技术领域technical field
本实用新型涉及次声学领域，具体涉及到一种可调压力腔室体积的次声实验系统。The utility model relates to the field of infrasonics, in particular to an infrasound experiment system with an adjustable pressure chamber volume.
背景技术Background technique
次声是频率低于20Hz的人类不可听声波，对人类的心理和生理均会产生影响。人体各部位都存在细微而有节奏的脉动，这种脉动频率一般为2～16Hz，如内脏为4～6Hz，头部为8～12Hz等。人体的这些固有频率正好在次声波的频率范围内，一旦大功率的次声波作用于人体，就会引起人体强烈的共振，从而造成极大的伤害。人长期暴露在较强的次声环境中会导致各器官功能异常、病变，甚至造成严重伤害，如失衡、神经系统紊乱、脏器损坏、死亡等。Infrasound is an inaudible sound wave with a frequency lower than 20Hz, which can affect human psychology and physiology. There are subtle and rhythmic pulsations in every part of the human body, and the pulsation frequency is generally 2-16 Hz, such as 4-6 Hz for internal organs and 8-12 Hz for the head. These natural frequencies of the human body are just within the frequency range of infrasonic waves. Once high-power infrasound waves act on the human body, it will cause strong resonance in the human body, causing great harm. Long-term exposure to a strong infrasound environment can lead to abnormal function of various organs, pathological changes, and even serious injuries, such as imbalance, nervous system disorders, organ damage, and death.
为了定量研究不同频率、强度和暴露时间的次声对人体的影响及其机制，需要研制一种次声实验系统，在排除闻阈噪声的干扰下(闻阈声是频率为20Hz～20kHz的人类可听声波)，对不同环境的次声进行室内模拟，并使所模拟的次声环境具有可控制性和可重复性。In order to quantitatively study the influence of infrasound of different frequencies, intensities and exposure times on the human body and its mechanism, it is necessary to develop an infrasound experimental system, under the exclusion of the interference of hearing threshold noise (auditory threshold sound is the frequency of 20Hz ~ 20kHz human audible sound waves), to simulate indoor infrasound in different environments, and make the simulated infrasound environment controllable and repeatable.
现有专利名称为《次声发生器》，专利号为99206766.9的实用新型专利，该专利是基于赫姆霍茨谐振器的基本原理设计的次声发生器，该专利存在下列缺陷：The existing patent name is "Infrasound Generator", and the patent number is a utility model patent of 99206766.9. This patent is an infrasound generator designed based on the basic principle of a Helmholtz resonator. This patent has the following defects:
一、该专利中次声压力腔室的体积是固定的。次声实验系统的次声压力腔室体积应与实验对象相适宜。压力腔室体积过小，则无法进行实验，或者即使可以实验也对实验对象产生“压迫感”，影响实验对象的生理检测指标或主观评价；压力腔室体积过大，会引起压力腔室四周腔壁变形加大，影响室内的共振特性、输出的最大次声声压级以及幅频特性、室内声压级的空间分布均匀性。分别制造不同体积的次声压力腔室则造成浪费，并导致使用不便。1. The volume of the infrasonic pressure chamber in this patent is fixed. The volume of the infrasonic pressure chamber of the infrasound experimental system should be suitable for the experimental object. If the volume of the pressure chamber is too small, the experiment cannot be carried out, or even if the experiment is possible, it will produce a "oppressive feeling" to the subject, which will affect the physiological detection index or subjective evaluation of the subject; if the volume of the pressure chamber is too large, it will cause pressure around the pressure chamber. The deformation of the cavity wall increases, which affects the resonance characteristics of the room, the maximum output infrasound sound pressure level and amplitude-frequency characteristics, and the spatial distribution uniformity of the sound pressure level in the room. Manufacturing infrasonic pressure chambers of different volumes separately causes waste and causes inconvenience in use.
二、该专利中的次声发生器没有声压误差主动控制设备。由于诸多因素的作用，次声压力腔室内的次声幅频、相频和次声声压级不稳定，存在较大误差。该专利中的设备不能实现快速、准确的主动调节声压误差。2. The infrasound generator in this patent does not have sound pressure error active control equipment. Due to the effects of many factors, the infrasonic amplitude frequency, phase frequency and infrasonic sound pressure level in the infrasonic pressure chamber are unstable, and there are large errors. The device in this patent cannot realize fast and accurate active adjustment of sound pressure error.
三、该专利中的次声发生器只能通过改变调节管的长度和直径两个变量来改变次声压力腔室内声场的共振频率，且调节管不是组合式的，在1～20Hz内需要加工制造很多调节管。3. The infrasound generator in this patent can only change the resonance frequency of the sound field in the infrasonic pressure chamber by changing the two variables of the length and diameter of the adjustment tube, and the adjustment tube is not combined, and needs to be processed within 1-20Hz Make a lot of regulator tubes.
四、采用钢结构框架，钢板作为箱体壁板，箱体质量大，使用不轻便；钢板在次声压力波动下腔壁变形大，影响谐振腔内的声压特性。4. The steel structure frame is adopted, and the steel plate is used as the box wall. The box is heavy and not easy to use; the steel plate deforms greatly under the fluctuation of infrasonic pressure, which affects the sound pressure characteristics in the resonant cavity.
五、箱体框架及壁板均采用焊接等永久固定形式，制造工序繁琐，不易组装和拆卸，也不能调节。5. The frame and wall panels of the box body are permanently fixed by welding. The manufacturing process is cumbersome, and it is not easy to assemble and disassemble, nor can it be adjusted.
六、采用一个玻璃观察窗和一扇门，用来观察实验对象和方便人员出入，观察视野易受窗子所限，且同时安装玻璃观察窗和门，使箱体结构复杂。且箱体下方没有安装万向轮等能使箱体灵活移动的装置。6. A glass observation window and a door are used to observe the experimental object and facilitate personnel to enter and exit. The observation field of view is easily limited by the window, and the glass observation window and door are installed at the same time, which makes the structure of the box complex. And there is no device such as universal wheels installed below the box body that can make the box body move flexibly.
实用新型内容Utility model content
本实用新型为解决现有次声发生器由于次声压力腔室体积固定导致的不能灵活用于不同尺寸的实验对象、不能使室内的次声特性达到最优，同时由于压力腔室内的次声幅频、相频和次声声压级不稳定，导致存在较大误差等问题；提供一种可调压力腔室体积的次声实验系统。The utility model aims to solve the problem that the existing infrasound generator cannot be flexibly used for experimental objects of different sizes due to the fixed volume of the infrasonic pressure chamber, and the infrasonic characteristics in the chamber cannot be optimized. The amplitude frequency, phase frequency and infrasonic sound pressure level are unstable, resulting in large errors and other problems; an infrasonic experimental system with adjustable pressure chamber volume is provided.
可调压力腔室体积的次声实验系统，包括箱体、声源驱动设备和声压检测设备，所述箱体包括扬声器室和经封闭处理的谐振腔、腔壁上的共振腔管和腔壁夹层间的吸声材料构成的次声压力腔室；所述扬声器室与声源驱动设备连接，声源驱动设备与声压检测设备连接；还包括声压误差主动控制设备，所述声压误差主动控制设备分别与声源驱动设备和声压检测设备连接；所述次声压力腔室的体积可调，所述共振腔管由调节管和法兰组成；所述调节管为两端开口的可伸缩组合套管，具有不同直径并插入法兰的孔径形成过盈配合；所述箱体壁由碳纤维壁板固定在箱体框架上围成，通过调节次声压力腔室的高度改变所述声压力腔室的体积。Infrasound experiment system with adjustable pressure chamber volume, including box body, sound source drive equipment and sound pressure detection equipment, said box body includes speaker room and sealed resonant cavity, resonant cavity tube and cavity on cavity wall An infrasonic pressure chamber made of sound-absorbing materials between the wall interlayers; the speaker chamber is connected to the sound source driving device, and the sound source driving device is connected to the sound pressure detection device; it also includes sound pressure error active control equipment, and the sound pressure The error active control equipment is respectively connected with the sound source drive equipment and the sound pressure detection equipment; the volume of the infrasonic pressure chamber is adjustable, and the resonance cavity tube is composed of an adjustment tube and a flange; the adjustment tube is open at both ends The telescopic combined sleeve has different diameters and is inserted into the flange to form an interference fit; the box wall is fixed on the box frame by carbon fiber wall panels, and the height of the infrasonic pressure chamber is changed by adjusting the height of the infrasonic pressure chamber. Describe the volume of the acoustic pressure chamber.
本发明所述的箱体框架包括四根主立柱、四根副立柱、两根横梁、四根顶梁、一根加强横梁、三根加强底梁、四根底梁和门柱，四根主立柱的顶端通过角件组合分别固定四根顶梁，下端通过角件组合分别固定四根底梁；所述顶梁和底梁在箱体透明玻璃门处设有一根门柱，所述门柱的两端通过角件组合连接顶梁和底梁，门柱用于连接透明玻璃门。所述底梁的内侧通过角件组合连接三根加强底梁，所述四根主立柱内侧分别固定四根副立柱，两根横梁分别通过角件组合与副立柱连接，所述两个横梁通过角件组合连接在加强横梁上。移动两个横梁与副立柱间的角件组合，通过改变横梁与加强横梁平面在副立柱上的高度位置，改变谐振腔的体积。所述扬声器室底部的带孔碳纤维壁板固定在两个横梁和加强横梁上，所述带孔碳纤维壁板上设有圆孔A，用于固定扬声器，带孔碳纤维壁板的四角设有开口，用于配合副立柱的端面尺寸，使横梁、加强横梁和带孔碳纤维壁板组合后在副立柱的高度方向上移动，改变谐振腔的体积；The box frame of the present invention includes four main columns, four auxiliary columns, two beams, four top beams, a reinforced beam, three reinforced bottom beams, four bottom beams and door posts, and four main columns Four top beams are respectively fixed at the top by corner fittings, and four bottom beams are respectively fixed at the lower end by corner fittings; the top beam and bottom beam are provided with a door post at the transparent glass door of the box, and the two ends of the door post are The top beam and the bottom beam are connected through the combination of corner pieces, and the door post is used to connect the transparent glass door. The inner side of the bottom beam is connected with three reinforced bottom beams through corner fittings, four auxiliary columns are respectively fixed inside the four main columns, two beams are respectively connected with the auxiliary columns through corner fittings, and the two beams are connected through corners. The combination of parts is connected to the reinforcing beam. The combination of corners between the two beams and the auxiliary column is moved, and the volume of the resonant cavity is changed by changing the height position of the plane of the beam and the reinforced beam on the auxiliary column. The perforated carbon fiber wall plate at the bottom of the speaker room is fixed on the two beams and the reinforcing beam, the perforated carbon fiber wall plate is provided with a round hole A for fixing the speaker, and the four corners of the perforated carbon fiber wall plate are provided with openings , which is used to match the size of the end face of the auxiliary column, so that the beam, the reinforced beam and the carbon fiber wall plate with holes are combined to move in the height direction of the auxiliary column to change the volume of the resonant cavity;
所述次声压力腔室的箱体框架的内侧固定碳纤维壁板，形成具有双层箱体壁及底板的封闭谐振腔，副立柱内侧固定的两个左右侧碳纤维壁板的高度需配合横梁在副立柱上的高度位置。The inner side of the box frame of the infrasonic pressure chamber is fixed with carbon fiber wall panels to form a closed resonant cavity with double-layer box walls and bottom plates. The height position on the secondary upright.
本实用新型的有益效果：本实用新型提供可调压力腔室体积的次声实验系统，用于次声对人体和动物影响的实验研究。Beneficial effects of the utility model: the utility model provides an infrasound experiment system with an adjustable pressure chamber volume, which is used for experimental research on the influence of infrasound on human body and animals.
一、依据副立柱上的刻度系列调节连接横梁与4个副立柱的角件组合位置，能根据实验对象的尺寸调节次声压力腔室体积从而使室内的次声特性最优，安装对应的系列调节管使该系统能灵活适用于豚鼠、猿猴和人类等不同实验对象，进行次声对人体和动物影响的实验研究；1. According to the scale series on the auxiliary column, adjust the combined position of the connecting beam and the corner pieces of the four auxiliary columns, and adjust the volume of the infrasonic pressure chamber according to the size of the experimental object to optimize the infrasonic characteristics in the room. Install the corresponding series The adjustment tube makes the system flexible and applicable to different experimental objects such as guinea pigs, apes and humans, and conducts experimental research on the effects of infrasound on humans and animals;
二、该系统设计了声压误差主动控制设备，将声压检测设备输出的次声幅频、相频和次声声压级等信号输入PC机和信号监测单元，PC机根据信号监测单元确定的声压信号误差，控制增益系数选择单元确定适宜的增益系数，主动控制功率放大器，使谐振腔内的测量点获得自适应调节的精确、稳定的理想声压；2. The system is designed with sound pressure error active control equipment. The infrasound amplitude frequency, phase frequency and infrasound sound pressure level signals output by the sound pressure detection equipment are input into the PC and the signal monitoring unit. The PC determines the signal according to the signal monitoring unit. The sound pressure signal error, control the gain coefficient selection unit to determine the appropriate gain coefficient, actively control the power amplifier, so that the measurement point in the resonant cavity can obtain an accurate and stable ideal sound pressure for adaptive adjustment;
三、本实用新型所述的次声实验系统可以通过在副立柱的高度方向上下移动连接横梁和副立柱的角件组合，改变压力腔室的体积。因此，该系统在副立柱高度方向上刻有刻度标记，以确定不同系列的压力腔室的体积，从而根据实验中的不同频率配套加工出不同系列的调节管。通过改变压力腔室的体积、调节管的长度和直径等三个变量实现次声频共振，减少了调节管系列；同时，调节管做成可伸缩的组合套管，极大降低了调节管系列数目；3. The infrasound experiment system described in the utility model can change the volume of the pressure chamber by moving the corner piece combination connecting the beam and the auxiliary column up and down in the height direction of the auxiliary column. Therefore, the system is engraved with scale marks in the height direction of the auxiliary column to determine the volume of different series of pressure chambers, so that different series of regulating tubes can be processed according to different frequencies in the experiment. Infrasonic resonance is realized by changing the volume of the pressure chamber, the length and diameter of the adjusting tube, and the number of adjusting tube series is reduced; at the same time, the adjusting tube is made into a telescopic combined sleeve, which greatly reduces the number of adjusting tube series ;
四、本实用新型所述的箱体使用铝合金型材框架、碳纤维壁板等轻量化材料组装，使用轻便，便于移动；刚度大，在次声压力波动下腔壁变形小，次声压力腔室的体积变化小，能获得理想的谐振腔最大声压级的幅频特性曲线；4. The box body described in the utility model is assembled with lightweight materials such as aluminum alloy profile frame and carbon fiber wallboard, which is easy to use and easy to move; the rigidity is large, and the deformation of the cavity wall is small under the fluctuation of infrasonic pressure, and the infrasonic pressure chamber The volume change is small, and the ideal amplitude-frequency characteristic curve of the maximum sound pressure level of the resonator can be obtained;
五、本实用新型的箱体框架采用铝合金型材，通过角件、角栓和六角法兰螺母(或者角件、螺栓和T型螺母)连接组装而成，组装简单、拆卸方便；5. The box frame of the present invention is made of aluminum alloy profile, which is assembled by connecting corner pieces, corner bolts and hexagonal flange nuts (or corner pieces, bolts and T-shaped nuts), which is simple to assemble and easy to disassemble;
六、箱体安装透明玻璃门，较之于同时安装玻璃观察窗和门，使箱体结构简单、观察视野更广；6. The transparent glass door is installed on the box body, which makes the box body structure simple and the observation field of view wider than that of installing glass observation windows and doors at the same time;
七、箱体的四个主立柱下端安装万向轮，便于箱体灵活移动，实验时将万向轮锁死，避免实验过程中晃动；7. Universal wheels are installed at the lower ends of the four main columns of the box to facilitate the flexible movement of the box. During the experiment, the universal wheels are locked to avoid shaking during the experiment;
八、本实用新型借助于赫姆霍茨谐振器的放大作用使谐振腔产生共振增益放大，可以减小声源驱动设备的功率输出，降低腔内次声波的失真，用较小的电功率获得较高的声压级；同时在次声频段内谐振腔的低频共振增益比高频大的特性，还可部分补偿扬声器低频频响特性差的不利因素。8. The utility model uses the amplification effect of the Helmholtz resonator to amplify the resonance gain of the resonant cavity, which can reduce the power output of the sound source driving equipment, reduce the distortion of the infrasonic wave in the cavity, and obtain higher At the same time, in the infrasound frequency band, the low-frequency resonance gain of the resonator is larger than the high-frequency characteristic, which can also partially compensate for the unfavorable factors of the poor low-frequency frequency response characteristics of the speaker.
附图说明Description of drawings
图1为本实用新型所述的可调压力腔室体积的次声实验系统去掉箱体盖后的轴测示意图；Fig. 1 is the axonometric schematic diagram after removing the casing cover of the infrasonic experimental system of the adjustable pressure chamber volume described in the utility model;
图2为本实用新型所述的可调压力腔室体积的次声实验系统中箱体框架与碳纤维壁板连接示意图；Fig. 2 is a schematic diagram of the connection between the box frame and the carbon fiber wallboard in the infrasound experimental system with adjustable pressure chamber volume described in the utility model;
图3为本实用新型所述的可调压力腔室体积的次声实验系统中次声压力腔室夹层与吸声材料布置示意图；Fig. 3 is a schematic diagram of the layout of the infrasonic pressure chamber interlayer and sound-absorbing material in the infrasonic experiment system with adjustable pressure chamber volume described in the present invention;
图4为本实用新型所述的可调压力腔室体积的次声实验系统中箱体框架组装示意图；Fig. 4 is the assembly schematic diagram of box frame in the infrasound experiment system of adjustable pressure chamber volume described in the utility model;
图5为本实用新型所述的可调压力腔室体积的次声实验系统中次声压力腔室内左右侧碳纤维壁板与扬声器布置示意图；Fig. 5 is a schematic diagram of the layout of carbon fiber wall panels and loudspeakers on the left and right sides of the infrasonic pressure chamber in the infrasonic experimental system with adjustable pressure chamber volume according to the utility model;
图6为本实用新型所述的可调压力腔室体积的次声实验系统中角件组合连接关系示意图。Fig. 6 is a schematic diagram of the combined connection relationship of the corner fittings in the infrasonic experimental system with adjustable pressure chamber volume according to the present invention.
具体实施方式Detailed ways
具体实施方式一、结合图1至图6说明本实施方式，可调压力腔室体积的次声实验系统，包括箱体、声源驱动设备和声压检测设备，所述箱体包括扬声器室11和经封闭处理的谐振腔1、腔壁上的共振腔管2和腔壁夹层间的吸声材料3构成的次声压力腔室；所述扬声器室11与声源驱动设备连接，声源驱动设备与声压检测设备连接；还包括声压误差主动控制设备，所述声压误差主动控制设备分别与声源驱动设备和声压检测设备连接；所述次声压力腔室的体积可调，DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 1. This embodiment is described in conjunction with FIGS. 1 to 6. The infrasound experiment system with adjustable pressure chamber volume includes a cabinet, sound source drive equipment and sound pressure detection equipment. The cabinet includes a speaker chamber 11 An infrasonic pressure chamber composed of the sealed resonant cavity 1, the resonant cavity tube 2 on the cavity wall and the sound-absorbing material 3 between the cavity wall interlayer; the speaker chamber 11 is connected with the sound source driving equipment, and the sound source drives The device is connected to the sound pressure detection device; it also includes a sound pressure error active control device, and the sound pressure error active control device is respectively connected to the sound source driving device and the sound pressure detection device; the volume of the infrasonic pressure chamber is adjustable,
所述声源驱动设备包括正弦信号发生器6、功率放大器5和扬声器4；所述声压检测设备，包括传声器10、次声滤波器和声级计9和PC机8；所述声压误差主动控制设备为信号监测单元和增益系数选择单元7；Described sound source driving equipment comprises sinusoidal signal generator 6, power amplifier 5 and loudspeaker 4; Described sound pressure detection equipment comprises microphone 10, infrasonic filter and sound level meter 9 and PC 8; Described sound pressure error The active control device is a signal monitoring unit and a gain factor selection unit 7;
所述系统的声源驱动设备、声压检测设备和声压误差主动控制设备工作方式如下。所述系统由PC机8控制正弦信号发生器6，产生1～20Hz的单频信号，通过功率放大器5对信号进行放大，然后供给扬声器4，通过选定频率和调节功放可以控制谐振腔1的次声频率和声压级；根据不同的实验对象尺寸，移动连接副立柱12-2和横梁12-3的角件组合，确定压力腔室的体积，并安装调节对应的调节管2-1，通过调节压力腔室的体积、调节管的长度和直径等三个变量来使谐振腔1的共振频率与扬声器4输出的基频正弦信号相吻合，从而使压力腔室产生次声共振，达到最大声压级；置于压力腔室内部的传声器10，可以根据测量位置的需要而布置在不同测量点，并连接次声滤波器和声级计9，声级计9输出次声幅频、相频和次声声压级等信号给PC机8存储，便于以后的信号处理、观察；PC机8输出到信号监测单元和增益系数选择单元7，并根据信号监测单元确定的声压信号误差控制增益系数选择单元确定适宜的增益系数，主动控制功率放大器5，使谐振腔1内的测量点获得自适应调节的精确、稳定的理想声压。The sound source drive equipment, sound pressure detection equipment and sound pressure error active control equipment of the system work in the following manner. The system controls the sinusoidal signal generator 6 by the PC 8 to generate a single-frequency signal of 1-20 Hz, amplifies the signal through the power amplifier 5, and then supplies it to the speaker 4, and the frequency of the resonant cavity 1 can be controlled by selecting the frequency and adjusting the power amplifier. Infrasonic frequency and sound pressure level; according to the size of different experimental objects, move the combination of corner fittings connecting the auxiliary column 12-2 and the beam 12-3, determine the volume of the pressure chamber, and install and adjust the corresponding adjustment tube 2-1, By adjusting three variables such as the volume of the pressure chamber, the length and diameter of the adjustment tube, the resonant frequency of the resonant cavity 1 is consistent with the fundamental frequency sinusoidal signal output by the speaker 4, so that the pressure chamber produces infrasonic resonance and reaches the maximum Sound pressure level; the microphone 10 placed inside the pressure chamber can be arranged at different measurement points according to the needs of the measurement position, and connect the infrasound filter and the sound level meter 9, and the sound level meter 9 outputs the infrasound amplitude frequency, phase The signals such as frequency and infrasound sound pressure level are stored in PC 8, which is convenient for signal processing and observation in the future; PC 8 is output to signal monitoring unit and gain coefficient selection unit 7, and is controlled according to the sound pressure signal error determined by signal monitoring unit The gain coefficient selection unit determines an appropriate gain coefficient and actively controls the power amplifier 5 so that the measuring point in the resonant cavity 1 can obtain an adaptively adjusted accurate and stable ideal sound pressure.
所述共振腔管2由调节管2-1和法兰2-2组成；所述调节管2-1为两端开口的可伸缩组合套管，具有不同直径并插入法兰2-2的孔径形成过盈配合；The resonance cavity tube 2 is composed of an adjustment tube 2-1 and a flange 2-2; the adjustment tube 2-1 is a telescopic combined sleeve with two ends open, with different diameters and inserted into the aperture of the flange 2-2 form an interference fit;
结合图1至图5说明本实施方式，所述箱体由碳纤维壁板14用螺栓或螺钉固定在箱体框架12上围成。所述箱体由固定扬声器4的带孔碳纤维壁板11-1隔离为两部分，下部为次声压力腔室、上部为扬声器室11。所述次声压力腔室的箱体框架12内侧需固定碳纤维壁板14，形成具有双层箱体壁及底板的封闭谐振腔1，谐振腔1的左壁空腔1-1、前壁空腔1-2、右壁空腔1-3、后壁空腔1-4和底板空腔1-5填充吸声材料3，其顶部加强横梁12-5中央安装有日光灯11-7。所述扬声器室11底部带孔碳纤维壁板11-1的均布圆孔A11-2上共固定四个扬声器4，其上端有碳纤维箱盖11-4，所述碳纤维箱盖11-4前部安装有箱盖锁11-6，后部通过三个箱盖合页11-5固定在箱体框架12上。所述箱体安装有透明玻璃门13，透明玻璃门13一侧装有门锁13-1、另一侧通过三个门合页13-2固定在箱体框架12中的门柱12-9上。所述箱体在箱体框架12的四根主立柱12-1下端面分别安装有万向轮12-10。This embodiment is described with reference to FIGS. 1 to 5 . The box body is surrounded by carbon fiber wall plates 14 fixed on the box body frame 12 with bolts or screws. The box body is separated into two parts by the perforated carbon fiber wall plate 11 - 1 that fixes the speaker 4 , the lower part is the infrasonic pressure chamber, and the upper part is the speaker chamber 11 . The inner side of the box frame 12 of the infrasound pressure chamber needs to fix the carbon fiber wall plate 14 to form a closed resonant cavity 1 with a double-layer box wall and a bottom plate. The left wall cavity 1-1 of the resonant cavity 1, the front wall cavity Cavities 1-2, right wall cavities 1-3, rear wall cavities 1-4 and floor cavities 1-5 are filled with sound-absorbing material 3, and a fluorescent lamp 11-7 is installed in the center of the top reinforcing beam 12-5. A total of four loudspeakers 4 are fixed on the evenly distributed round holes A11-2 of the carbon fiber wall plate 11-1 with holes at the bottom of the speaker chamber 11, and a carbon fiber box cover 11-4 is arranged on the upper end thereof, and the front part of the carbon fiber box cover 11-4 A case cover lock 11-6 is installed, and the rear portion is fixed on the casing frame 12 by three case cover hinges 11-5. Described box body is equipped with transparent glass door 13, and door lock 13-1 is equipped with on one side of transparent glass door 13, and the door post 12-9 in box frame 12 is fixed on the other side by three door hinges 13-2. superior. The box is provided with universal wheels 12-10 on the lower end faces of the four main columns 12-1 of the box frame 12, respectively.
所述次声压力腔室的侧面1/3高度左右开一个圆孔B1-6，圆孔B1-6外侧通过螺栓同心固定一个法兰2-2，法兰2-2可以有不同孔径系列，以配合不同直径调节管2-1,调节管2-1为两端开口的可伸缩组合套管，可以调节长度，也可以具有不同直径，并可以插入法兰2-2的孔径形成过盈配合。通过改变压力腔室的体积、调节管2-1的长度和直径等三个变量来调节次声压力腔室内次声共振频率大小，需要根据实验所用的频率和次声压力腔室体积的不同组合制作出系列调节管2-1。A circular hole B1-6 is opened on the left and right of the side of the infrasonic pressure chamber at 1/3 height, and a flange 2-2 is concentrically fixed on the outer side of the circular hole B1-6 by bolts. The flange 2-2 can have different aperture series, Adjusting tube 2-1 with different diameters, the adjusting tube 2-1 is a telescopic combined sleeve with openings at both ends, can adjust the length, can also have different diameters, and can be inserted into the aperture of the flange 2-2 to form an interference fit . Adjust the infrasonic resonance frequency in the infrasonic pressure chamber by changing the volume of the pressure chamber, the length and diameter of the adjustment tube 2-1, etc., depending on the frequency used in the experiment and the different combinations of the volume of the infrasonic pressure chamber A series of regulating tubes 2-1 were produced.
本实施方式所述的箱体框架12是由4040系列和4080系列工业铝合金型材通过角件组合连接组装而成的长方体结构；所述箱体框架12的四根主立柱12-1采用4080系列工业铝合金型材，其余均采用4040系列工业铝合金型材；所述四根主立柱12-1内侧通过螺栓连接分别固定四根副立柱12-2，其顶端通过角件组合分别固定四根顶梁12-4，其下端通过角件组合分别固定四根底梁12-8，其上端截面处分别安装有端盖12-6。所述顶梁12-4和底梁12-8在箱体透明玻璃门13处，设有一根门柱12-9，并通过角件组合连接顶梁12-4和底梁12-8，门柱12-9上用螺钉固定三个门合页13-2，连接透明玻璃门13。正对箱体前门侧的顶梁12-4上表面用螺钉固定三个箱盖合页11-5，连接碳纤维箱盖11-4。所述底梁12-8的内侧设立三根加强底梁12-7，并通过角件组合连接。所述副立柱12-2在箱体两侧面处，通过角件组合连接副立柱12-2和横梁12-3。所述两个横梁12-3分别通过角件组合连接在加强横梁12-5上。上下移动横梁12-3与副立柱12-2间的四个角件组合，可以改变横梁12-3和加强横梁12-5平面在副立柱12-2上的高度位置，从而改变谐振腔1的体积。The box frame 12 described in this embodiment is a cuboid structure assembled from 4040 series and 4080 series industrial aluminum alloy profiles through corner fittings; the four main columns 12-1 of the box frame 12 adopt 4080 series Industrial aluminum alloy profiles, the rest are made of 4040 series industrial aluminum alloy profiles; the inner sides of the four main columns 12-1 are respectively fixed by bolts to four auxiliary columns 12-2, and the top ends are respectively fixed by corner fittings to four top beams 12-4, its lower end fixes four bottom beams 12-8 respectively through the combination of corner fittings, and end caps 12-6 are respectively installed at its upper end section. The top beam 12-4 and the bottom beam 12-8 are provided with a door post 12-9 at the transparent glass door 13 of the box body, and are connected to the top beam 12-4 and the bottom beam 12-8 through corner fittings, and the door Fix three door hinges 13-2 with screws on the post 12-9, and connect the transparent glass door 13. Three case cover hinges 11-5 are fixed with screws on the top beam 12-4 upper surface of the front door side of the casing, and the carbon fiber case cover 11-4 is connected. Three reinforced bottom beams 12-7 are set on the inner side of the bottom beam 12-8, and are combined and connected by corner pieces. The secondary column 12-2 is connected to the secondary column 12-2 and the crossbeam 12-3 through corner fittings at both sides of the box. The two beams 12-3 are respectively connected to the reinforcing beam 12-5 through corner pieces. Moving up and down the combination of four corners between the beam 12-3 and the auxiliary column 12-2 can change the height position of the plane of the beam 12-3 and the reinforced beam 12-5 on the auxiliary column 12-2, thereby changing the resonant cavity 1 volume.
本实施方式所述的副立柱4-2上设置刻度标记系列，使其满足利用压力腔室的体积、调节管2-1的长度和直径等三个变量确定共振频率时的压力腔室的体积值系列。所述双层箱体壁中的左右侧碳纤维壁板1-7安装在箱体框架12内侧，在上下移动横梁12-3与副立柱12-2间的四个角件组合时会与横梁12-3干涉，其高度需配合横梁12-3在副立柱12-2上的高度位置，在一定高度范围内需更换一个近似高度的左右侧碳纤维壁板1-7，只需根据刻度标记系列制作几组不同高度的左右侧碳纤维壁板1-7作为更换。The auxiliary column 4-2 described in this embodiment is provided with a series of scale marks, so that it meets the volume of the pressure chamber when the resonance frequency is determined by using three variables such as the volume of the pressure chamber and the length and diameter of the regulating tube 2-1. value series. The left and right side carbon fiber wall panels 1-7 in the double-layer box body wall are installed on the inside of the box body frame 12, and when the four corner pieces between the crossbeam 12-3 and the auxiliary column 12-2 are moved up and down, they will be combined with the crossbeam 12. -3 interference, its height needs to match the height position of the beam 12-3 on the auxiliary column 12-2, within a certain height range, it is necessary to replace a left and right side carbon fiber wall plate 1-7 of approximate height, only need to make a few according to the scale mark series Group the left and right side carbon fiber wall panels 1-7 of different heights as replacements.
本实施方式所述的带孔碳纤维壁板11-1上均布四个圆孔A11-2来安装扬声器4，并通过螺栓或螺钉固定在两个横梁12-3和加强横梁12-5上，其四角有40×40mm的开口11-3配合四根副立柱12-2的端面尺寸，使两个横梁12-3、加强横梁12-5和带孔碳纤维壁板11-1的组合能在四根副立柱12-2高度方向上移动，从而实现谐振腔1的体积系列。The perforated carbon fiber wall plate 11-1 in this embodiment is evenly distributed with four round holes A11-2 to install the loudspeaker 4, and is fixed on the two beams 12-3 and the reinforcing beam 12-5 by bolts or screws. Its four corners have openings 11-3 of 40×40mm to match the end face dimensions of four auxiliary columns 12-2, so that the combination of two beams 12-3, reinforced beams 12-5 and carbon fiber wall panels with holes 11-1 can The root auxiliary column 12-2 moves in the height direction, so as to realize the volume series of the resonant cavity 1 .
本实施方式中所述的角件组合是由角件A、六角法兰螺母B和角栓C组成。所述角件组合用来连接两个工业铝合金型材，角件A的两个直角端面分别接触两个铝合金型材，角栓C通过其中一个铝合金型材的端面进入滑槽D并穿过角件A上的通孔E，拧上六角法兰螺母B，将角件A和这个铝合金型材固定；同样，可将所述的另一个铝合金型材与角件A固定。所述角件组合通过沿滑槽D移动角栓C，可以移动角件组合，进而改变其中一个铝合金型材在另一个铝合金型材上的位置，即为本箱体中调节横梁12-3与副立柱12-2间的四个角件组合在副立柱12-2上高度位置的方法，进而作为本箱体调节压力腔室体积的手段。The corner fitting assembly described in this embodiment is composed of corner fitting A, hexagonal flange nut B and corner bolt C. The corner fitting combination is used to connect two industrial aluminum alloy profiles. The two right-angled end faces of the corner fitting A contact the two aluminum alloy profiles respectively. The corner bolt C enters the chute D through the end face of one of the aluminum alloy profiles and passes through the corner Screw the hex flange nut B on the through hole E on the part A to fix the corner part A and this aluminum alloy profile; similarly, the other aluminum alloy profile and the corner part A can be fixed. By moving the corner bolt C along the chute D, the corner fitting combination can move the corner fitting combination, and then change the position of one aluminum alloy profile on the other aluminum alloy profile, that is, adjust the crossbeam 12-3 and The method in which the four corner fittings between the secondary columns 12-2 are combined at the height position on the secondary column 12-2 is used as a means for adjusting the volume of the pressure chamber of the box.
具体实施方式二、本实施方式为采用具体实施方式一所述的可调压力腔室体积的次声实验系统测试次声对人体和动物影响的实验方法：Embodiment 2. This embodiment is an experimental method for testing the influence of infrasound on human body and animals by adopting the infrasound experimental system with adjustable pressure chamber volume described in Embodiment 1:
次声对人和动物生理功能的影响是多方面的，主要包括次声对神经系统、心血管系统、内分泌系统、对前庭和听觉系统等的影响。实验研究的关键因素主要由次声暴露频率、暴露强度、暴露时间和次声对人和动物影响结果信息的获取。The impact of infrasound on the physiological functions of humans and animals is multifaceted, mainly including the impact of infrasound on the nervous system, cardiovascular system, endocrine system, and vestibular and auditory systems. The key factors of the experimental research are mainly the acquisition of infrasound exposure frequency, exposure intensity, exposure time and the results of infrasound effects on humans and animals.
首先，选定人或动物等实验对象，根据实验对象尺寸，依据副立柱12-2上的标记刻度系列来移动连接副立柱12-2和横梁12-3的角件组合，选择合适的压力腔室体积；根据次声压力腔室的体积和实验要求的次声暴露频率安装相应的共振腔管2，并通过调节压力腔室的体积、调节管2-1的长度和直径等三个变量使压力腔室产生次声共振，达到最大声压级；First of all, select the test object such as human or animal, according to the size of the test object, move the corner fitting combination connecting the auxiliary column 12-2 and the beam 12-3 according to the marked scale series on the auxiliary column 12-2, and select a suitable pressure chamber chamber volume; according to the volume of the infrasonic pressure chamber and the infrasound exposure frequency required by the experiment, the corresponding resonant cavity pipe 2 is installed, and three variables such as the volume of the pressure chamber and the length and diameter of the regulating pipe 2-1 are used to make the The pressure chamber produces infrasonic resonance, reaching the maximum sound pressure level;
然后，根据实验要求的次声暴露频率，由PC机8控制正弦信号发生器6产生相应的单频信号，传输给功率放大器5；根据实验要求的次声暴露强度，PC机8通过信号监测和增益系数选择单元7控制功率放大器5对信号进行放大，然后供给扬声器4，使谐振腔1内达到实验要求的次声暴露强度；置于压力腔室内部的可移动传声器10，将测量信号输出到次声滤波器和声级计9，声级计输出次声幅频、相频和次声声压级等信号给PC机8存储，便于以后的信号处理、观察；Then, according to the infrasound exposure frequency required by the experiment, the sinusoidal signal generator 6 is controlled by the PC 8 to generate a corresponding single-frequency signal, which is transmitted to the power amplifier 5; according to the infrasound exposure intensity required by the experiment, the PC 8 monitors and The gain coefficient selection unit 7 controls the power amplifier 5 to amplify the signal, and then supplies it to the speaker 4, so that the infrasound exposure intensity required by the experiment can be reached in the resonant cavity 1; the movable microphone 10 placed inside the pressure chamber outputs the measurement signal to Infrasonic filter and sound level meter 9, the sound level meter outputs signals such as infrasound amplitude frequency, phase frequency and infrasound sound pressure level to PC 8 for storage, which is convenient for future signal processing and observation;
PC机8输出信号到信号监测和增益系数选择单元7，并根据信号监测单元确定的声压信号误差控制增益系数选择单元确定适宜的增益系数，主动控制功率放大器5，使谐振腔1内的测量点获得自适应调节的精确、稳定的理想声压。The PC 8 outputs signals to the signal monitoring and gain coefficient selection unit 7, and controls the gain coefficient selection unit to determine a suitable gain coefficient according to the sound pressure signal error determined by the signal monitoring unit, actively controls the power amplifier 5, and makes the measurement in the resonant cavity 1 Accurate and stable ideal sound pressure with self-adaptive adjustment.
本实施方式所述的次声实验系统放置于隔声室内，按照实验要求调节好暴露频率和暴露强度后，将选定的人或动物等实验对象放进谐振腔1内，打开日光灯11-7，锁上透明玻璃门13和碳纤维箱盖11-4，按照实验要求的次声暴露时间进行实验，待次声暴露结束后立即对实验对象进行检测，获取结果信息。The infrasound experiment system described in this embodiment is placed in a soundproof room, after adjusting the exposure frequency and exposure intensity according to the experiment requirements, put the selected human or animal and other experimental objects into the resonant cavity 1, and turn on the fluorescent lamp 11-7 , lock the transparent glass door 13 and the carbon fiber box cover 11-4, conduct the experiment according to the infrasound exposure time required by the experiment, and immediately detect the test object after the infrasound exposure is over, and obtain the result information.
本实施方式中检测的指标是电生理项目和血液及常规内容，考虑到所有的信息在次声暴露结束后消失的快慢程度，检测次序一般为：首先测量反应内分泌及交感神经变化的醛固酮、皮脂醇、胰岛素、游离T3、T4、血糖等，以及反应常规指标的血压和脉博等，这些需要在2min内完成；其次测量心电图来反应心血管系统的变化，在2min内完成；然后测量脑电图，反应神经系统的变化，在10min内完成；最后测量脑干诱发电位图，反应听觉系统的变化，在35min内完成；所有测量任务累计需要50min左右。The indicators detected in this embodiment are electrophysiological items, blood and routine content. Considering the speed at which all information disappears after infrasound exposure, the detection sequence is generally as follows: first, measure aldosterone and sebum that reflect changes in endocrine and sympathetic nerves. Alcohol, insulin, free T3, T4, blood sugar, etc., as well as blood pressure and pulse that reflect conventional indicators, etc., which need to be completed within 2 minutes; secondly, the electrocardiogram is measured to reflect changes in the cardiovascular system, which is completed within 2 minutes; then the EEG is measured The graph, reflecting the changes of the nervous system, was completed within 10 minutes; the final measurement of the brainstem evoked potential map, reflecting the changes of the auditory system, was completed within 35 minutes; all measurement tasks took about 50 minutes in total.
其中，实验时通过透明玻璃门观察实验对象的主观反应。实验对象为人时，进行主观问答记录实验对象主观感受，从而保证对受试者不构成长远的生理不可逆损害的同时获得有效实验结果。Among them, the subjective reactions of the subjects were observed through the transparent glass door during the experiment. When the subject of the experiment is a human being, subjective questions and answers are conducted to record the subjective feelings of the subject, so as to ensure that no long-term irreversible physiological damage is caused to the subject while obtaining effective experimental results.
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520534993.0UCN204813955U (en) | 2015-07-22 | 2015-07-22 | Infrasonic sound experimental system of adjustable pressure cavity volume |
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520534993.0UCN204813955U (en) | 2015-07-22 | 2015-07-22 | Infrasonic sound experimental system of adjustable pressure cavity volume |
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| CN204813955Utrue CN204813955U (en) | 2015-12-02 |
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| CN201520534993.0UWithdrawn - After IssueCN204813955U (en) | 2015-07-22 | 2015-07-22 | Infrasonic sound experimental system of adjustable pressure cavity volume |
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| Date | Code | Title | Description |
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| AV01 | Patent right actively abandoned | Granted publication date:20151202 Effective date of abandoning:20171117 |