CN112858389B - Imaging dew point meter - Google Patents

Abstract

The invention relates to the technical field of dew condensation measurement, and provides an imaging dew point instrument which comprises a control system, a dew condensation system, a heat dissipation system and a photoelectric detection system, wherein the dew condensation system, the heat dissipation system and the photoelectric detection system are respectively connected with the control system, the dew condensation system comprises a mirror surface, and the photoelectric detection system comprises a photoelectric imaging device and a detection cover body; the detection cover body comprises a detection cavity and a detection upper cover arranged above the detection cavity, the photoelectric imaging device is arranged in the detection upper cover and comprises a light source and a camera, the camera is provided with a lens, the light source is arranged on one side of the detection upper cover, and the camera is arranged in the middle of the detection upper cover. The invention improves the photoelectric detection system, solves the problem of poor reliability and anti-interference performance of the dew point instrument and enables the dew point measurement value to be more accurate.

Description

Translated fromChinese

一种成像式露点仪An imaging dew point meter

技术领域technical field

本发明涉及结露测量技术领域，更具体地，涉及一种成像式露点仪。The present invention relates to the technical field of dew condensation measurement, in particular to an imaging dew point meter.

背景技术Background technique

现有的露点仪工作原理是：当被测气体进入结露室，并以一定的流速掠过镜面，镜面温度高于该气体的露点温度，干燥的镜面将光源的入射光近乎于全反射。露点仪进行测量时，首先根据光电检测器检测到的反射光的强度来控制制冷装置，使镜面温度下降，直至镜面结露或结霜，此时入射光在镜面上将会产生漫反射，反射光的强度则会相应改变，光电检测器感应到反射光信号的变化，锁定温度，此时的温度就是该气体的露点值。The working principle of the existing dew point meter is: when the gas to be measured enters the condensation chamber and passes over the mirror at a certain flow rate, the temperature of the mirror is higher than the dew point temperature of the gas, and the dry mirror almost totally reflects the incident light of the light source. When the dew point meter is used for measurement, the refrigeration device is first controlled according to the intensity of the reflected light detected by the photoelectric detector, so that the temperature of the mirror surface drops until the mirror surface condenses or frosts. The intensity of the light will change accordingly, and the photodetector senses the change of the reflected light signal and locks the temperature. The temperature at this time is the dew point value of the gas.

目前大部分露点仪采用的感光器件均采用单一的感光器件如光敏二极管、光敏电阻及光电管等对镜面反射光进行测量，该方法可靠性和抗干扰性较差，精度较低，再者，当镜面上有污物或划痕时，入射光在镜面会提前产生漫反射，导致光电检测器提前锁定温度，而此时的温度实际上并非该气体的露点值。At present, most of the photosensitive devices used in dew point meters use single photosensitive devices such as photodiodes, photoresistors and photoelectric tubes to measure the mirror reflected light. This method has poor reliability, anti-interference and low precision. Furthermore, When there is dirt or scratches on the mirror surface, the incident light will be diffusely reflected on the mirror surface in advance, causing the photodetector to lock the temperature in advance, and the temperature at this time is actually not the dew point value of the gas.

发明内容Contents of the invention

本发明旨在克服上述现有技术的至少一种缺陷(不足)，提供一种成像式露点仪，用于解决露点仪可靠性和抗干扰性差的问题，使得露点的测量值更加准确。The present invention aims at overcoming at least one defect (deficiency) of the above-mentioned prior art, and provides an imaging dew point meter, which is used to solve the problem of poor reliability and anti-interference of the dew point meter, so that the measured value of the dew point is more accurate.

本发明采取的技术方案是，提供一种成像式露点仪，包括控制系统、结露系统、散热系统、光电检测系统，所述结露系统、散热系统、光电检测系统分别与所述控制系统连接，所述结露系统包括镜面，所述光电检测系统包括光电成像装置和检测盖体；所述检测盖体包括检测腔和设置于所述检测腔上方的检测上盖，所述光电成像装置设置于检测上盖内；所述光电成像装置包括光源和摄像机，所述摄像机设置有镜头，所述光源设置于检测上盖的一侧，所述摄像机设置于检测上盖的中间；其中，所述控制系统通过控制所述摄像机使所述摄像机以固定时间间隔连续拍摄镜面图像，并将所述摄像机拍摄的图像传输给所述控制系统，所述控制系统对所述摄像机拍摄到的图像进行分析，进而控制所述结露系统，得出露点。The technical solution adopted by the present invention is to provide an imaging dew point meter, including a control system, a dew condensation system, a heat dissipation system, and a photoelectric detection system, and the dew condensation system, heat dissipation system, and photoelectric detection system are respectively connected to the control system , the dew condensation system includes a mirror, the photoelectric detection system includes a photoelectric imaging device and a detection cover; the detection cover includes a detection cavity and a detection upper cover arranged above the detection cavity, and the photoelectric imaging device is set In the detection upper cover; the photoelectric imaging device includes a light source and a camera, the camera is provided with a lens, the light source is arranged on one side of the detection upper cover, and the camera is arranged in the middle of the detection upper cover; wherein, the The control system controls the camera so that the camera continuously captures mirror images at fixed time intervals, and transmits the images captured by the camera to the control system, and the control system analyzes the images captured by the camera, Then control the dew condensation system to obtain the dew point.

本方案中，所述控制系统根据绝对值差分法，将摄像机按时间顺序拍摄的第1张摄像图像中的所有像素的亮度与第2张及以后的各摄像图像中的所有像素的亮度进行顺序比较，比较同一像素中亮度差的绝对值，将每张图像与第1张图像亮度差绝对值分解为256灰度，制作每张图像与第1张图像的灰度直方图，亮度差为0的像素忽略，根据分析灰度直方图的结果，控制系统控制结露系统调整温度，检测出露点值。In this solution, the control system sequentially compares the brightness of all pixels in the first captured image captured by the camera in chronological order with the brightness of all pixels in the second and subsequent captured images according to the absolute value difference method Compare, compare the absolute value of the brightness difference in the same pixel, decompose the absolute value of the brightness difference between each image and the first image into 256 gray levels, and make a gray histogram of each image and the first image, the brightness difference is 0 According to the results of analyzing the gray histogram, the control system controls the condensation system to adjust the temperature and detect the dew point value.

与现有技术相比，通过分析镜面表面的图像，可以提高被测气体中露点的测量精度，并可以在短时间内对被测气体中的露点进行测量，再者，通过差分化处理，除去了镜面由于污垢或划痕而引起的测量误差，从而提高了结露系统的检测灵敏度，从而可以大幅度提高测量精度，同时，对于摄像机镜头上的污垢和划痕而引起的误差，也可以被避免，提高了露点仪的可靠性和抗干扰性。Compared with the existing technology, by analyzing the image of the mirror surface, the measurement accuracy of the dew point in the measured gas can be improved, and the dew point in the measured gas can be measured in a short time. It eliminates the measurement error caused by dirt or scratches on the mirror surface, thereby improving the detection sensitivity of the condensation system, which can greatly improve the measurement accuracy. At the same time, the error caused by dirt and scratches on the camera lens can also be avoided. , Improve the reliability and anti-interference of the dew point meter.

进一步的，所述摄像机外罩有透明罩，所述透明罩连接在检测上盖上。本方案中，通过在摄像机外设置透明罩，使相机与检测环境隔开，保护相机不受到检测气体及水雾等的伤害。Further, the camera is covered with a transparent cover, and the transparent cover is connected to the detection upper cover. In this solution, a transparent cover is set outside the camera to separate the camera from the detection environment and protect the camera from damage by detection gas and water mist.

进一步的，所述透明罩的上表面内侧与所述摄像机的镜头表面密封连接。本方案中，将透明罩上表面与摄像机镜头表面密封连接，防止透明罩与摄像机镜头表面之间的间隙产生水雾。Further, the inner side of the upper surface of the transparent cover is sealingly connected with the lens surface of the camera. In this solution, the upper surface of the transparent cover is sealed and connected to the surface of the camera lens to prevent water mist from being generated in the gap between the transparent cover and the surface of the camera lens.

进一步的，所述透明罩上表面外侧位于摄像机视野范围外的位置设有湿度传感器，用于检测透明罩上表面外侧湿度变化。Further, a humidity sensor is provided outside the upper surface of the transparent cover outside the field of view of the camera to detect changes in humidity outside the upper surface of the transparent cover.

进一步的，所述透明罩的一侧安装有驱动箱，所驱动箱内部安装有驱动件，所述驱动件连接有除雾杆，所述驱动件驱动所述除雾杆在透明罩上表面来回摆动，进行透明罩的除雾工作。Further, a driving box is installed on one side of the transparent cover, and a driving part is installed inside the driving box, and the driving part is connected with a demist rod, and the driving part drives the demist rod back and forth on the upper surface of the transparent cover. Swing to perform the defogging work of the transparent cover.

进一步的，所述除雾杆为L字型；其中，所述除雾杆的一端在所述驱动箱内与所述驱动件连接，另一端伸至所述透明罩上表面外侧。Further, the defogging rod is L-shaped; wherein, one end of the defogging rod is connected to the driving member in the driving box, and the other end extends outside the upper surface of the transparent cover.

进一步的，所述除雾杆非连接于所述驱动件的一端内侧设置有除雾垫，所述除雾杆与所述除雾垫胶接连接。Further, a defogging pad is provided inside the end of the demisting rod that is not connected to the driving member, and the demisting rod is glued to the defogging pad.

本方案中，当湿度传感器检测到透明罩上表面外侧湿度变化时，所述湿度传感器向控制系统发送信号，控制系统控制驱动件驱动除雾杆摆动，带动所述除雾垫擦拭透明罩上表面外侧，除去透明罩上表面外侧的雾气，保证摄像机所拍摄图像的质量。In this solution, when the humidity sensor detects changes in humidity outside the upper surface of the transparent cover, the humidity sensor sends a signal to the control system, and the control system controls the driving part to drive the defogging rod to swing, driving the defogging pad to wipe the upper surface of the transparent cover On the outside, the mist on the outside of the upper surface of the transparent cover is removed to ensure the quality of the image captured by the camera.

进一步的，所述摄像机和驱动箱上设置有散热片，使得摄像机和驱动件散发的热量及时散发出去。Further, the camera and the drive box are provided with cooling fins, so that the heat dissipated by the camera and the drive can be dissipated in time.

进一步的，所述结露系统还包括：测温计，用于检测温度；制冷片，其上表面为制冷面，下表面为散热面；导热结构，其下表面与所述制冷面连接，以将所述制冷面的冷量传递至所述导热结构的上表面，所述导热结构还连接与所述测温计；所述镜面，其下表面与所述导热结构上表面连接，以将所述导热结构上表面的冷量传递至所述镜面的上表面，使作业环境中的水蒸气结露于所述镜面的上表面；其中，所述测温计为铂电阻，且其外表面设有导热硅脂层或导热胶层；所述镜面为硅片，且其外表面设有铂层或金层或铑层。Further, the dew condensation system further includes: a thermometer for detecting temperature; a cooling plate whose upper surface is a cooling surface and whose lower surface is a heat dissipation surface; a heat conduction structure whose lower surface is connected to the cooling surface to Transfer the cold energy of the cooling surface to the upper surface of the heat conduction structure, and the heat conduction structure is also connected to the thermometer; the lower surface of the mirror surface is connected to the upper surface of the heat conduction structure, so that the The cold energy on the upper surface of the heat conduction structure is transferred to the upper surface of the mirror, so that the water vapor in the working environment is condensed on the upper surface of the mirror; wherein, the thermometer is a platinum resistance, and its outer surface is set There is a heat-conducting silicone grease layer or a heat-conducting adhesive layer; the mirror surface is a silicon wafer, and its outer surface is provided with a platinum layer, a gold layer, or a rhodium layer.

本方案中，所述测温计通过检测导热结构的温度，间接测量出镜面的温度，从而测量出水汽的温度。所述制冷片通过热电制冷原理，其制冷面形成冷量作用于导热结构，其散热面形成热量作用于连接该散热面的部件。所述导热结构用于将来自制冷片的冷量传递至所述镜面。所述镜面的上表面为结露的场所。所述镜面设置为硅片，其表面平整光亮且导热效率较高。In this solution, the thermometer indirectly measures the temperature of the mirror surface by detecting the temperature of the heat conducting structure, thereby measuring the temperature of the water vapor. The refrigerating sheet adopts the principle of thermoelectric refrigeration, the cooling surface forms cold energy to act on the heat conduction structure, and the heat dissipation surface forms heat to act on the components connected to the heat dissipation surface. The heat conduction structure is used to transfer the cold energy from the cooling sheet to the mirror surface. The upper surface of the mirror is a place for dew condensation. The mirror surface is set as a silicon wafer, the surface of which is flat and bright and has high heat conduction efficiency.

本方案中，所述制冷片的制冷面所产生的冷量通过所述导热结构传递到所述镜面的上表面，以使作业环境中的水蒸气结露到镜面的上表面，再通过测温计检测出导热结构的温度，从而间接检测出镜面的温度，即检测出气体的露点温度，从而获得气体中的湿度。In this solution, the cold generated by the cooling surface of the cooling sheet is transferred to the upper surface of the mirror through the heat conduction structure, so that the water vapor in the working environment condenses on the upper surface of the mirror, and then the temperature is measured The meter detects the temperature of the heat-conducting structure, thereby indirectly detecting the temperature of the mirror surface, that is, detecting the dew point temperature of the gas, thereby obtaining the humidity in the gas.

本方案中，在镜面的外表面设有铂层或金层或铑层，舍弃了常规的镜面为铜且铜的外表面设有金层的技术，从而使得本方案能够提高镜面的抗污能力，且使得所述镜面不易被划损，避免检测精度受到不利影响。In this solution, a platinum layer, a gold layer, or a rhodium layer is provided on the outer surface of the mirror surface, and the conventional technology that the mirror surface is copper and the copper outer surface is provided with a gold layer is abandoned, so that this solution can improve the anti-pollution ability of the mirror surface , and make the mirror surface not easy to be scratched, so as to prevent the detection accuracy from being adversely affected.

进一步的，所述控制系统包括控制转接板、电气针、远程控制主机；所述散热系统包括散热座，所述散热座设有腔体；其中，所述控制转接板位于所述腔体内并连接于所述远程控制主机；所述电气针插装于所述腔体内且电连接所述控制转接板，所述电气针与所述散热座绝缘连接；其中，所述电气针还电连接于光电检测系统、结露系统；所述制冷片设有的散热面连接于所述散热座。Further, the control system includes a control adapter board, electrical needles, and a remote control host; the heat dissipation system includes a heat sink, and the heat sink is provided with a cavity; wherein, the control adapter plate is located in the cavity and connected to the remote control host; the electrical needle is inserted into the cavity and electrically connected to the control adapter board, and the electrical needle is insulated and connected to the heat sink; wherein, the electrical needle is also electrically It is connected to the photoelectric detection system and the dew condensation system; the heat dissipation surface provided by the cooling plate is connected to the heat dissipation seat.

本方案中，所述散热座用于将所述制冷结构的散热面产生的热量散发出去。所述电气针与所述散热座绝缘连接，避免散热座对露点检测器的正常使用产生影响。所述腔体用于容纳所述控制转接板，且所述电气针插装于所述腔体内且电连接于所述控制转接板，以使得所述露点检测器的线路集中位于所述散热座的腔体内，避免线路露出露点检测器外界，从而影响检测效果并对线路造成损坏。In this solution, the heat dissipation seat is used to dissipate the heat generated by the heat dissipation surface of the refrigeration structure. The electrical needle is insulated and connected to the heat sink to prevent the heat sink from affecting the normal use of the dew point detector. The cavity is used to accommodate the control adapter board, and the electrical needle is inserted into the cavity and electrically connected to the control adapter board, so that the circuit of the dew point detector is concentrated on the In the cavity of the heat sink, prevent the circuit from being exposed to the outside of the dew point detector, thereby affecting the detection effect and causing damage to the circuit.

与现有技术相比，本发明的有益效果为：本发明设置了光电成像装置，通过拍摄、分析结露系统镜面表面的图像，得出露点值，可以提高被测气体中露点的测量精度，并可以在短时间内对被测气体中的露点进行测量，再者，通过差分化处理，除去了镜面由于污垢或划痕而引起的测量误差，从而提高了结露系统的检测灵敏度，从而可以大幅度提高测量精度，同时，对于摄像机镜头上的污垢和划痕而引起的误差，也可以被避免，提高了露点仪的可靠性和抗干扰性，在摄像机外设置透明罩和除雾装置，保护了摄像机的同时，也保证了摄像机所拍摄图像的质量，进而确保了露点的测量精度。Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention is provided with a photoelectric imaging device, and the dew point value can be obtained by taking and analyzing the image of the mirror surface of the dew condensation system, which can improve the measurement accuracy of the dew point in the measured gas, And it can measure the dew point in the measured gas in a short time. Moreover, through differential treatment, the measurement error caused by dirt or scratches on the mirror surface is removed, thereby improving the detection sensitivity of the dew condensation system, which can greatly The range improves the measurement accuracy, and at the same time, the errors caused by dirt and scratches on the camera lens can also be avoided, which improves the reliability and anti-interference performance of the dew point meter. A transparent cover and defogging device are installed outside the camera to protect While improving the camera, it also ensures the quality of the image captured by the camera, thereby ensuring the measurement accuracy of the dew point.

附图说明Description of drawings

图1为本发明的爆炸图。Figure 1 is an exploded view of the present invention.

图2为本发明的剖面图。Fig. 2 is a sectional view of the present invention.

图3为本发明A部仰视图。Fig. 3 is a bottom view of part A of the present invention.

图4为本发明结露系统爆炸图。Fig. 4 is an exploded view of the dew condensation system of the present invention.

图5为本发明A部放大图。Fig. 5 is an enlarged view of part A of the present invention.

附图标记：检测上盖11、检测腔12、光源13、摄像机14、气孔121、透明罩21、驱动箱22、除雾杆23、除雾垫231、镜面31、密封圈32、导热结构33、测温计34、制冷片35、散热座41、航空接头42、散热尾盖43、腔体411、电气针51、控制转接板52。Reference signs: detectionupper cover 11,detection cavity 12,light source 13,camera 14,air hole 121,transparent cover 21,drive box 22,defogging rod 23,defogging pad 231,mirror surface 31,sealing ring 32,heat conduction structure 33 ,Thermometer 34,refrigeration sheet 35,heat sink 41,aviation connector 42, heatdissipation tail cover 43,cavity 411,electrical needle 51,control adapter plate 52.

具体实施方式detailed description

本发明附图仅用于示例性说明，不能理解为对本发明的限制。为了更好说明以下实施例，附图某些部件会有省略、放大或缩小，并不代表实际产品的尺寸；对于本领域技术人员来说，附图中某些公知结构及其说明可能省略是可以理解的。The accompanying drawings of the present invention are only for illustrative purposes, and should not be construed as limiting the present invention. In order to better illustrate the following embodiments, some components in the drawings will be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, some known structures and their descriptions in the drawings may be omitted. understandable.

实施例Example

如图1所示，本实施例提供一种成像式露点仪，包括控制系统、结露系统、散热系统、光电检测系统，所述结露系统、散热系统、光电检测系统分别与所述控制系统连接。As shown in Figure 1, this embodiment provides an imaging dew point meter, including a control system, a dew condensation system, a heat dissipation system, and a photoelectric detection system, and the dew condensation system, heat dissipation system, and photoelectric detection system are respectively connected with the control system connect.

具体地，所述结露系统包括镜面31，所述光电检测系统包括光电成像装置和检测盖体，所述检测盖体包括检测腔12和设置于所述检测腔12上方的检测上盖11，所述光电成像装置设置于检测上盖11内，所述光电成像装置包括光源13和摄像机14，所述摄像机14设有镜头，所述光源13设置于检测上盖11的一侧，所述摄像机14设置于检测上盖11的中间，其中，所述控制系统通过控制所述摄像机14使所述摄像机14以固定时间间隔连续拍摄镜面31图像，并将所述摄像机14拍摄的图像传输给所述控制系统，控制系统接收到图像后根据绝对值差分法，将摄像机14按时间顺序拍摄的第1张摄像图像中的所有像素的亮度与第2张及以后的各摄像图像中的所有像素的亮度进行顺序比较，比较同一像素中亮度差的绝对值，将每张图像与第1张图像亮度差绝对值分解为256灰度，制作每张图像与第1张图像的灰度直方图，亮度差为0的像素忽略，根据分析灰度直方图的结果，控制系统控制结露系统调整温度，检测出露点值。Specifically, the dew condensation system includes amirror 31, the photoelectric detection system includes a photoelectric imaging device and a detection cover, and the detection cover includes adetection cavity 12 and a detectionupper cover 11 arranged above thedetection cavity 12, The photoelectric imaging device is arranged in the detectionupper cover 11, the photoelectric imaging device includes alight source 13 and acamera 14, thecamera 14 is provided with a lens, thelight source 13 is arranged on one side of the detectionupper cover 11, and thecamera 14 is arranged in the middle of the detectionupper cover 11, wherein the control system controls thecamera 14 to make thecamera 14 continuously capture images of themirror surface 31 at fixed time intervals, and transmit the images captured by thecamera 14 to the Control system, after the control system receives the image, according to the absolute value difference method, the brightness of all pixels in the first captured image taken by thecamera 14 in time sequence and the brightness of all pixels in the second and subsequent captured images Perform sequential comparison, compare the absolute value of the brightness difference in the same pixel, decompose the absolute value of the brightness difference between each image and the first image into 256 gray levels, and make a gray histogram of each image and the first image, the brightness difference The pixels that are 0 are ignored. According to the result of analyzing the gray histogram, the control system controls the dew condensation system to adjust the temperature and detect the dew point value.

在本实施例中，所述光源13采用LED发射光源，摄像机14拍摄镜面31照片的时间间隔为1/20秒。In this embodiment, thelight source 13 is an LED emitting light source, and the time interval for thecamera 14 to take pictures of themirror surface 31 is 1/20 second.

如图2、图5所示，所述摄像机14外罩有透明罩21，所述透明罩21连接在检测上盖11上。As shown in FIG. 2 and FIG. 5 , thecamera 14 is covered with atransparent cover 21 , and thetransparent cover 21 is connected to the detectionupper cover 11 .

为避免摄像机14受到被测气体及水雾的损坏，所述透明罩21的上表面内侧与所述摄像机14的镜头表面密封连接。In order to prevent thecamera 14 from being damaged by the measured gas and water mist, the inside of the upper surface of thetransparent cover 21 is sealed with the lens surface of thecamera 14 .

进一步地，所述透明罩21上表面外侧位于摄像机14视野范围外的位置设有湿度传感器，用于检测透明罩21上表面外侧湿度变化。Further, a humidity sensor is provided outside the upper surface of thetransparent cover 21 outside the field of view of thecamera 14 to detect changes in humidity outside the upper surface of thetransparent cover 21 .

如图3所示，所述透明罩21的一侧安装有驱动箱22，所驱动箱22内部安装有驱动件，所述驱动件连接有除雾杆23，所述驱动件驱动所述除雾杆23在透明罩21上表面来回摆动，进行透明罩21的除雾工作。As shown in Figure 3, adriving box 22 is installed on one side of thetransparent cover 21, and a driving member is installed inside thedriving box 22, and the driving member is connected with adefogging rod 23, and the driving member drives thedefogging rod 23 Therod 23 swings back and forth on the upper surface of thetransparent cover 21 to perform the defogging work of thetransparent cover 21 .

具体地，所述除雾杆23为L字型；其中，所述除雾杆23的一端在所述驱动箱22内与所述驱动件连接，另一端伸至所述透明罩21上表面外侧。Specifically, thedefogging rod 23 is L-shaped; wherein, one end of thedefogging rod 23 is connected to the driving member in thedrive box 22, and the other end extends to the outside of the upper surface of thetransparent cover 21 .

进一步地，所述除雾杆23非连接于所述驱动件的一端内侧设置有除雾垫231，所述除雾杆23与所述除雾垫231胶接连接。Further, adefogging pad 231 is provided inside the end of thedefogging rod 23 that is not connected to the driving member, and thedefogging rod 23 is glued to thedefogging pad 231 .

当湿度传感器检测到透明罩21上表面外侧湿度变化时，所述湿度传感器向控制系统发送信号，控制系统控制驱动件驱动除雾杆23摆动，带动所述除雾垫231擦拭透明罩21上表面外侧，除去透明罩21上表面外侧的雾气，保证了摄像机所拍摄图像的质量。When the humidity sensor detects that the humidity outside the upper surface of thetransparent cover 21 changes, the humidity sensor sends a signal to the control system, and the control system controls the driver to drive thedefogging rod 23 to swing, driving thedefogging pad 231 to wipe the upper surface of thetransparent cover 21 On the outside, the mist outside the upper surface of thetransparent cover 21 is removed to ensure the quality of the image captured by the camera.

进一步地，所述摄像机14和驱动箱22上设置有散热片。Further, heat sinks are arranged on thecamera 14 and thedriving box 22 .

如图4所示，所述结露系统包括镜面31、密封圈32、导热结构33、测温计34、制冷片35。所述结露系统安装于所述散热系统上。所述结露系统的具体工作过程为：制冷片35通过热电制冷原理产生冷量，制冷片35产生的冷量通过所述导热结构33传递到镜面31的上表面，以使作业环境中的水蒸气结露到镜面31的上表面，形成冷凝物。所述结露系统再通过测温计34检测出导热结构33的温度，从而间接检测出镜面31的温度，由此可间接获得气体的湿度。As shown in FIG. 4 , the dew condensation system includes amirror 31 , a sealingring 32 , aheat conduction structure 33 , athermometer 34 , and acooling plate 35 . The dew condensation system is installed on the heat dissipation system. The specific working process of the dew condensation system is as follows: the refrigeratingplate 35 generates cooling energy through the principle of thermoelectric refrigeration, and the cooling energy generated by the refrigeratingplate 35 is transferred to the upper surface of themirror surface 31 through theheat conducting structure 33, so that the water in the working environment The vapor condenses on the upper surface of themirror surface 31 to form condensate. The dew condensation system detects the temperature of theheat conducting structure 33 through thethermometer 34, thereby indirectly detecting the temperature of themirror surface 31, thereby indirectly obtaining the humidity of the gas.

具体地，制冷片35具有制冷面和散热面，制冷片35的上表面为制冷面，其下表面为散热面。详细地，制冷片35可以为具有三层结构，但不仅限于三层结构。Specifically, the coolingsheet 35 has a cooling surface and a cooling surface, the upper surface of thecooling sheet 35 is a cooling surface, and the lower surface of thecooling sheet 35 is a cooling surface. In detail, therefrigeration sheet 35 may have a three-layer structure, but is not limited to a three-layer structure.

在本实施例中，制冷片35采用具有三层结构的制冷片，制冷片35最上层的结构的横截面积小于其它层的结构的横截面积。In this embodiment, the coolingsheet 35 is a cooling sheet with a three-layer structure, and the cross-sectional area of the uppermost layer of thecooling sheet 35 is smaller than that of other layers.

具体地，导热结构33用于传递来自于制冷片35的制冷面的冷量。详细地，导热结构33具有上表面和下表面，导热结构33的下表面与所述制冷面连接，以将所述制冷面的冷量传递至所述导热结构33的上表面。详细地，为了减小导热结构33的体积，导热结构33大体呈长方体状。详细地，为了减小所述结露系统的体积，对导热结构105作进一步的改进，导热结构33由侧面、上表面、下表面向内部凹陷以去除部分结构形成开放区域，所述测温计34嵌入所述开放区域中。详细地，所述开放区域大体呈长方体状。详细地，导热结构33可以由导热金属制成，优选为铜。Specifically, theheat conduction structure 33 is used for transferring cold energy from the cooling surface of thecooling sheet 35 . In detail, theheat conduction structure 33 has an upper surface and a lower surface, and the lower surface of theheat conduction structure 33 is connected to the cooling surface, so as to transfer the cold energy of the cooling surface to the upper surface of theheat conduction structure 33 . In detail, in order to reduce the volume of theheat conduction structure 33 , theheat conduction structure 33 is substantially in the shape of a cuboid. In detail, in order to reduce the volume of the dew condensation system, the heat conduction structure 105 is further improved. Theheat conduction structure 33 is recessed from the side, upper surface, and lower surface to form an open area by removing part of the structure. 34 embedded in the open area. In detail, the open area is generally in the shape of a cuboid. In detail, theheat conducting structure 33 can be made of heat conducting metal, preferably copper.

在本实施例中，所述为了进一步容纳所述测温计34，导热结构33作进一步改进，所述导热结构33由其外壁向内部凹陷形成凹槽，测温计34嵌入于凹槽内并与凹槽匹配。In this embodiment, in order to further accommodate thethermometer 34, theheat conduction structure 33 is further improved, the outer wall of theheat conduction structure 33 is recessed inwardly to form a groove, and thethermometer 34 is embedded in the groove and Match the groove.

具体地，镜面31为所述结露系统的结露场所。镜面31的下表面与所述导热结构33上表面连接，以将所述导热结构33上表面的冷量传递至所述镜面31的上表面，使作业环境中的水蒸气结露于所述镜面31的上表面形成冷凝物。详细地，为了提高导热效率，镜面31为硅片，所述硅片的截面大体上呈正方形状。详细地，为了提高镜面31的抗污能力，且使得所述镜面31不易被划损，在镜面31的外表面上设有铂层或金层或铑层，进一步地，所述铂层或金层或铑层设置于镜面31的上表面，进一步地，所述镜面31上设置有疏水材料层。Specifically, themirror surface 31 is the dew condensation place of the dew condensation system. The lower surface of themirror 31 is connected to the upper surface of theheat conducting structure 33, so as to transfer the cold energy from the upper surface of theheat conducting structure 33 to the upper surface of themirror 31, so that the water vapor in the working environment condenses on the mirror Condensate forms on the upper surface of 31. In detail, in order to improve the heat conduction efficiency, themirror surface 31 is a silicon chip, and the cross-section of the silicon chip is generally square. In detail, in order to improve the anti-fouling ability of themirror surface 31 and make themirror surface 31 not easily scratched, a platinum layer or a gold layer or a rhodium layer is provided on the outer surface of themirror surface 31, further, the platinum layer or gold layer A rhodium layer or a rhodium layer is disposed on the upper surface of themirror surface 31 , further, a hydrophobic material layer is disposed on themirror surface 31 .

具体地，所述测温计34用于测温。详细地，测温计34大体呈长方体状，且测温计34与所述开放区域匹配。详细地，所述测温计34为铂电阻，为了进一步增大热量传导面积，所述铂电阻的外表面设有导热硅脂层或导热胶层，以使测温计34和导热结构33无间隙贴紧。Specifically, thethermometer 34 is used for temperature measurement. In detail, thethermometer 34 is generally in the shape of a cuboid, and thethermometer 34 matches the open area. In detail, thethermometer 34 is a platinum resistance. In order to further increase the heat conduction area, the outer surface of the platinum resistance is provided with a heat-conducting silicone grease layer or a heat-conducting glue layer, so that thethermometer 34 and the heat-conductingstructure 33 have no The gap is tight.

具体地，为了避免水汽通过结露系统渗入到露点传感器内部，本申请实施例采用了密封圈32进行密封。所述密封圈32具有连通上下表面的容纳腔，详细地，密封圈32大体为梯形台状，所述梯形台侧面沿导热结构33围绕形成一个框架体，并包裹住镜面31的周边。详细地，导热结构33、镜面31、测温计34均围蔽于密封圈32内，即导热结构33、镜面31、测温计34均位于所述容纳腔内。详细地，密封圈32的上表面与其下表面之间具有一定的距离，密封圈32的下端部围蔽于制冷片35的上端部。详细地，密封圈32的下端部包裹于制冷片35最上层结构的外围。详细地，为了将结露于镜面31上表面的水汽位于镜面31的上表面所在区域内，密封圈32的上表面与所述镜面31的上表面具有一定距离，且所述密封圈104的上表面高于所述镜面31的上表面。详细地，为了进一步提高所述结露系统的气密性，所述密封圈32与镜面31紧密连接，密封圈32可以为橡胶密封圈。Specifically, in order to prevent water vapor from infiltrating into the dew point sensor through the dew condensation system, the embodiment of the present application adopts a sealingring 32 for sealing. The sealingring 32 has a receiving cavity connecting the upper and lower surfaces. In detail, the sealingring 32 is generally trapezoidal platform, and the side of the trapezoidal platform is surrounded by theheat conduction structure 33 to form a frame body, and wraps around the periphery of themirror surface 31 . In detail, theheat conduction structure 33 , themirror surface 31 and thethermometer 34 are all enclosed in the sealingring 32 , that is, theheat conduction structure 33 , themirror surface 31 and thethermometer 34 are all located in the accommodating chamber. In detail, there is a certain distance between the upper surface and the lower surface of the sealingring 32 , and the lower end of the sealingring 32 is enclosed by the upper end of the coolingplate 35 . In detail, the lower end of the sealingring 32 wraps around the outermost structure of the coolingplate 35 . In detail, in order to locate the water vapor condensed on the upper surface of themirror 31 in the area where the upper surface of themirror 31 is located, the upper surface of the sealingring 32 has a certain distance from the upper surface of themirror 31, and the upper surface of the sealing ring 104 The surface is higher than the upper surface of themirror 31 . In detail, in order to further improve the airtightness of the dew condensation system, the sealingring 32 is closely connected with themirror surface 31, and the sealingring 32 may be a rubber sealing ring.

具体地，所述检测盖体安装于所述散热系统上后，所述结露系统位于所述检测腔12内。详细地，为了方便将光电成像装置、透明罩21、除雾杆23、驱动箱22安装于检测上盖11上端部，所述检测上盖11可拆卸地与检测腔12连接。具体地，所述结露系统位于所述检测腔12内。所述检测腔12侧壁上设有气孔121。Specifically, after the detection cover is installed on the heat dissipation system, the dew condensation system is located in thedetection cavity 12 . In detail, for convenience, the photoelectric imaging device, thetransparent cover 21 , thedefogging rod 23 , and thedriving box 22 are installed on the upper end of the detectionupper cover 11 , which is detachably connected with thedetection cavity 12 . Specifically, the dew condensation system is located in thedetection chamber 12 . Air holes 121 are provided on the side wall of thedetection chamber 12 .

其中，所述控制系统包括电气针51、控制转接板52、航空接头42、远程控制主机。Wherein, the control system includes anelectrical needle 51, acontrol adapter board 52, anaviation connector 42, and a remote control host.

具体地，电气针51用于电传导。详细地，电气针51由导电金属构成，且其设有若干根。电气针51的大小可以设置相同，也可以设置不相同。具体地，航空接头42还连接于远程控制主机，以便于远程控制主机与所述控制转接板52进行信息交互。所述控制转接板52，可通过远程控制主机设有的屏幕对当前检测状态和对应的参数进行观察，并通过远程控制主机对检测参数进行设置。详细地，电气针51可以通过焊接的方式与控制转接板52进行连接。另外，电气针51还可通过电缆电连接于光电检测系统、结露系统。Specifically,electrical needles 51 are used for electrical conduction. In detail, theelectrical needle 51 is made of conductive metal, and several of them are provided. The sizes of theelectrical needles 51 can be set to be the same or different. Specifically, theaviation connector 42 is also connected to the remote control host, so as to facilitate information exchange between the remote control host and thecontrol adapter board 52 . Thecontrol adapter board 52 can observe the current detection status and corresponding parameters through the screen provided by the remote control host, and set the detection parameters through the remote control host. In detail, theelectrical pin 51 can be connected to thecontrol adapter board 52 by welding. In addition, theelectrical needle 51 can also be electrically connected to the photoelectric detection system and the dew condensation system through cables.

其中，所述散热系统包括散热座41、散热尾盖43。Wherein, the heat dissipation system includes aheat dissipation seat 41 and a heatdissipation tail cover 43 .

具体地，散热座41大体呈圆柱状。散热座41的上表面与所述结露系统的制冷结构107的散热面连接，以便将所述散热面所产生的热量通过散热座41散发出去。具体地，为了便于散热，散热座41可以由金属材料构成。详细地，散热座41下端部设有腔体411。Specifically, theheat sink 41 is substantially cylindrical. The upper surface of theheat dissipation seat 41 is connected to the heat dissipation surface of the cooling structure 107 of the dew condensation system, so as to dissipate the heat generated by the heat dissipation surface through theheat dissipation seat 41 . Specifically, in order to facilitate heat dissipation, theheat sink 41 may be made of metal material. In detail, acavity 411 is provided at the lower end of theheat sink 41 .

具体地，所述散热尾盖43上由下往上依次安装有航空接头42、控制转接板52，且航空接头42与控制转接板52连接。详细地，散热尾盖43安装于散热座41的下端部，散热尾盖43可以通过螺纹的方式连接于散热座41。Specifically, anaviation joint 42 and acontrol adapter plate 52 are installed on the heatdissipation tail cover 43 in sequence from bottom to top, and theaviation joint 42 is connected to thecontrol adapter plate 52 . In detail, the heatdissipation tail cover 43 is installed on the lower end of theheat dissipation seat 41 , and the heatdissipation tail cover 43 can be connected to theheat dissipation seat 41 through threads.

当散热尾盖43与散热座41完成安装，航空接头42、控制转接板52均位于所述腔体411内。详细地，所述航空接头42还可连接于电气针51。详细地，电气针51插装于所述腔体411内且电连接所述控制转接板52，所述电气针51与所述散热座41绝缘连接。电气针51可以由散热座41上端向下插装至所述腔体411。When the heatdissipation tail cover 43 and theheat dissipation seat 41 are installed, theaviation connector 42 and thecontrol adapter plate 52 are located in thecavity 411 . In detail, theaviation connector 42 can also be connected to theelectrical pin 51 . In detail, theelectrical pin 51 is inserted into thecavity 411 and electrically connected to thecontrol adapter board 52 , and theelectrical pin 51 is insulated and connected to theheat sink 41 . Theelectrical needle 51 can be inserted into thecavity 411 from the upper end of theheat sink 41 downward.

其中，为了防止水蒸气和空气进入对露点检测器内部电路和元器件造成损坏、避免有毒气体通过腔体411泄露到外界、避免电气针51和散热座41导电、避免电气针51和控制转接板52之间连接产生错位，本申请实施例在腔体411内填充有密封剂。所述密封剂可以为胶水，详细地，灌胶于所述腔体411内，胶水密封所述腔体411。Among them, in order to prevent water vapor and air from entering to cause damage to the internal circuit and components of the dew point detector, to avoid the leakage of toxic gas to the outside through thecavity 411, to prevent theelectric needle 51 and theheat sink 41 from conducting, and to avoid theelectric needle 51 and the control transfer Dislocation occurs in connection between theboards 52 , and in the embodiment of the present application, thecavity 411 is filled with a sealant. The sealant may be glue, in detail, the glue is poured into thecavity 411 , and the glue seals thecavity 411 .

在本实施例中，为避免电气针51和散热座41导电，可以在所述腔体411内壁设置绝缘垫，所述绝缘垫可以为橡胶垫。In this embodiment, in order to avoid electrical conduction between theelectrical pin 51 and theheat sink 41 , an insulating pad can be provided on the inner wall of thecavity 411 , and the insulating pad can be a rubber pad.

在本实施例中，可以通过玻璃烧结工艺固定电气针51和控制转接板52。In this embodiment, theelectrical needle 51 and thecontrol adapter plate 52 can be fixed by glass sintering process.

在本实施例中，可以通过玻璃烧结工艺实现电气针51和散热座41之间密封耐气体压力。In this embodiment, the sealing and resistance to gas pressure between theelectrical needle 51 and theheat sink 41 can be achieved through a glass sintering process.

所述露点仪的具体工作过程为：光电成像装置中的摄像机14在露点仪开始工作前，拍下第一张图像，并以1/20秒的时间间隔连续地拍摄镜面31上的图像，每拍摄一张图像立即传至控制系统进行分析，作业环境中的水蒸气通过检测腔12时掠过镜面31的上表面。当镜面31的上表面的温度高于该气体的露点温度时，镜面31的上表面呈干燥状态。此时，在控制系统的控制下，光电成像装置通过转接控制板52和航空接头42发射信号至远程控制主机，并接收来自远程控制主机的反馈信号，所述反馈信号再经控制回路比较、放大后，使驱动制冷片35进行制冷。当镜面31的上表面的温度降至气体的露点温度以下时，镜面31的上表面开始结露，形成冷凝物，这时光电成像装置继续通过转接控制板52和航空接头42发射信号至远程控制主机，并接收来自远程控制主机的反馈信号，根据反馈信号的变化，再将所述反馈信号经控制回路比较、放大后调节制冷片35激励电流，改变制冷片35的制冷功率，使镜面31的上表面的温度与气体的露点温度一致。此时，通过测温计34，可以检测出镜面31的温度，从而获得气体中的露点或霜点。The specific work process of the dew point meter is: thecamera 14 in the photoelectric imaging device takes the first image before the dew point meter starts to work, and takes the images on themirror surface 31 continuously with the time interval of 1/20 second, every time An image is captured and immediately transmitted to the control system for analysis, and the water vapor in the working environment passes through thedetection chamber 12 and skims over the upper surface of themirror 31 . When the temperature of the upper surface of themirror surface 31 is higher than the dew point temperature of the gas, the upper surface of themirror surface 31 is in a dry state. At this time, under the control of the control system, the photoelectric imaging device transmits a signal to the remote control host through thetransfer control board 52 and theaviation connector 42, and receives a feedback signal from the remote control host, and the feedback signal is compared by the control loop. After amplifying, drive therefrigeration sheet 35 to refrigerate. When the temperature of the upper surface of themirror 31 dropped below the dew point temperature of the gas, the upper surface of themirror 31 began to condense and form condensate. At this time, the photoelectric imaging device continued to send signals to the remote through thetransfer control board 52 and theaviation connector 42. Control the host, and receive the feedback signal from the remote control host, according to the change of the feedback signal, then compare and amplify the feedback signal through the control loop to adjust the excitation current of thecooling sheet 35, change the cooling power of thecooling sheet 35, and make themirror surface 31 The temperature of the upper surface is consistent with the dew point temperature of the gas. At this time, the temperature of themirror surface 31 can be detected by thethermometer 34, so as to obtain the dew point or frost point in the gas.

显然，本发明的上述实施例仅仅是为清楚地说明本发明技术方案所作的举例，而并非是对本发明的具体实施方式的限定。凡在本发明权利要求书的精神和原则之内所作的任何修改、等同替换和改进等，均应包含在本发明权利要求的保护范围之内。Apparently, the above-mentioned embodiments of the present invention are only examples for clearly illustrating the technical solution of the present invention, rather than limiting the specific implementation manner of the present invention. Any modification, equivalent replacement and improvement made within the spirit and principle of the claims of the present invention shall be included in the protection scope of the claims of the present invention.

Claims (9)

1. An imaging dew point instrument comprises a control system, a dew condensation system, a heat dissipation system and a photoelectric detection system, wherein the dew condensation system, the heat dissipation system and the photoelectric detection system are respectively connected with the control system, the dew condensation system comprises a mirror surface (31), and the photoelectric detection system comprises a photoelectric imaging device and a detection cover body; the detection cover body comprises a detection cavity (12) and a detection upper cover (11) arranged above the detection cavity (12), and the photoelectric imaging device is arranged in the detection upper cover (11);

the photoelectric imaging device is characterized by comprising a light source (13) and a camera (14), wherein the camera (14) is provided with a lens, the light source (13) is arranged on one side of the detection upper cover (11), and the camera (14) is arranged in the middle of the detection upper cover (11);

the control system controls the camera (14) to enable the camera (14) to continuously shoot images of a mirror surface (31) at fixed time intervals, the images shot by the camera (14) are transmitted to the control system, the control system analyzes the images shot by the camera (14), and then the control system controls the condensation system to obtain a dew point;

the dew condensation system further comprises:

a thermometer (34) for detecting a temperature;

the upper surface of the refrigeration sheet (35) is a refrigeration surface, and the lower surface of the refrigeration sheet is a heat dissipation surface;

the lower surface of the heat conduction structure (33) is connected with the refrigerating surface so as to transfer the cold energy of the refrigerating surface to the upper surface of the heat conduction structure (33), the heat conduction structure (33) is also connected with the temperature measurer (34), the heat conduction structure (33) is internally sunken from the outer wall of the heat conduction structure to form a groove, and the temperature measurer (34) is embedded in the groove and matched with the groove;

the sealing ring (32) is roughly in a trapezoid table shape, the side face of the trapezoid table surrounds along the heat conducting structure (33) to form a frame body, the frame body wraps the periphery of the mirror face (31), and the upper surface of the sealing ring is higher than that of the mirror face (31);

the lower surface of the mirror surface (31) is connected with the upper surface of the heat conduction structure (33) so as to transfer cold energy on the upper surface of the heat conduction structure (33) to the upper surface of the mirror surface (31) and enable water vapor in a working environment to be condensed on the upper surface of the mirror surface (31);

the thermometer (34) is a platinum resistor, and the outer surface of the thermometer is provided with a heat-conducting silicone layer or a heat-conducting adhesive layer; the mirror surface (31) is a silicon wafer, and a platinum layer, a gold layer or a rhodium layer is arranged on the outer surface of the mirror surface;

the upper surface of the sealing ring (32) and the lower surface of the sealing ring have a certain distance, and the lower end part of the sealing ring encloses the upper end part of the refrigerating sheet (35).

2. An imaging dew point meter as claimed in claim 1, characterised in that the camera (14) is covered by a transparent cover (21), the transparent cover (21) being connected to the upper detection cover (11).

3. An imaging dew point meter as claimed in claim 2, characterised in that the inside of the upper surface of the transparent cover (21) is sealingly connected to the surface of the lens of the camera (14).

4. An imaging dew point meter as claimed in claim 3, characterised in that a humidity sensor is provided outside the upper surface of the transparent cover (21) outside the field of view of the camera (14) for detecting changes in humidity outside the upper surface of the transparent cover (21).

5. An imaging dew point instrument as claimed in claim 2, wherein a driving box (22) is installed on one side of the transparent cover (21), a driving member is installed inside the driving box (22), the driving member is connected with a defogging rod (23), and the driving member drives the defogging rod (23) to swing back and forth on the upper surface of the transparent cover (21) to perform a defogging operation on the transparent cover (21).

6. An imaging dew point meter as claimed in claim 5, characterised in that the defogging bars (23) are L-shaped;

one end of the defogging rod (23) is connected with the driving piece in the driving box (22), and the other end of the defogging rod extends to the outer side of the upper surface of the transparent cover (21).

7. An imaging dew point meter as claimed in claim 6, wherein a defogging pad (231) is disposed inside an end of the defogging rod (23) not connected to the driving member, and the defogging rod (23) is connected to the defogging pad (231) by adhesive bonding.

8. An imaging dew point meter as claimed in claim 4, characterised in that cooling fins are provided on the camera (14) and the drive housing (22).

9. An imaging dew point meter as claimed in claim 1, characterised in that the control system comprises a control adapter plate (52), an electrical pin (51), a remote control host;

the heat dissipation system comprises a heat dissipation seat (41), and the heat dissipation seat (41) is provided with a cavity (411);

wherein the control adapter plate (52) is positioned in the cavity (411) and connected to the remote control host; the electric needle (51) is inserted into the cavity (411) and electrically connected with the control adapter plate (52), and the electric needle (51) is in insulated connection with the heat dissipation seat (41);

the electric needle (51) is also electrically connected with a photoelectric detection system and a condensation system; the cooling surface that refrigeration piece (35) was equipped with connect in heat-radiating seat (41).

Images