CN111458005A - Dynamic balance standard force source based symmetric retransmission sensor field calibration device and method - Google Patents
Dynamic balance standard force source based symmetric retransmission sensor field calibration device and methodDownload PDFInfo
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- CN111458005A CN111458005ACN202010518845.5ACN202010518845ACN111458005ACN 111458005 ACN111458005 ACN 111458005ACN 202010518845 ACN202010518845 ACN 202010518845ACN 111458005 ACN111458005 ACN 111458005A
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- 238000005303weighingMethods0.000claimsabstractdescription144
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G23/00—Auxiliary devices for weighing apparatus
- G01G23/01—Testing or calibrating of weighing apparatus
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Abstract
Description
Technical Field
The invention relates to the technical field of detection, in particular to a dynamic balance standard force source based field calibration device and method for a symmetrical retransmission sensor.
Background
The weighing sensor is the most common sensor in industrial practice, is a matched product of the electronic scale, and is widely applied to various industries such as metallurgy, chemical engineering, pharmacy, feed and the like. However, due to the fact that the sensitivity of the weighing sensor is inconsistent and the mechanical connecting piece has loading errors after being newly installed, the weighing sensor needs to be calibrated after being loaded by a standard weight or a standard force source. Meanwhile, after the device is used for a period of time, creep deformation or change of a mechanical connecting piece can be caused, and the measurement precision of the device can be influenced. For this reason, it is often necessary to calibrate it after loading it with a weight or standard force source at regular intervals.
At present, along with the requirement of large-scale production, the tonnage of a weighing sensor matched with the batching hopper is larger and larger in engineering. Due to space and other factors, the calibration cannot be carried out on site by using the traditional weight. In order to meet the need of calibrating the scale, some manufacturers provide a standard force source consisting of a standard weighing sensor, a display instrument and a jack or a low-height hydraulic oil cylinder, and the electronic scale is calibrated by loading the weighing sensor. Due to the problems of mechanical creep of the jack after force is applied or chronic oil leakage of the hydraulic oil cylinder and the like, the force source acting on the standard weighing sensor is changed, and the data of the display instrument cannot be stable. Secondly, the manual operation has the defects of high labor intensity, complex process, low measurement reliability, incapability of realizing automatic calibration and the like. Therefore, the technical personnel in the field need to solve the problems of high precision, stable and reliable force source, simple operation and suitability for automatic programming and data recording.
Disclosure of Invention
In view of the above problems, the present invention provides a dynamic balance standard force source based sensor field calibration apparatus and method, which at least solves some of the above technical problems.
In a first aspect, an embodiment of the present invention provides a dynamic balance standard force source based field calibration apparatus for a symmetric retransmission sensor, including: gantry frame and cylinder part;
wherein:
the gantry frame is internally provided with the following components from bottom to top: a weighing sensor to be measured, a hydraulic oil cylinder jack and a standard weighing sensor; the centers of the weighing sensor to be measured, the hydraulic oil cylinder jack and the standard weighing sensor are all on the same vertical line; the standard weighing sensor and the weighing sensor to be measured are respectively connected with a sensitivity coefficient compensation junction box;
the oil cylinder part comprises: the oil pump is arranged on the oil cylinder; the outer shell cover is arranged on the upper part of the oil cylinder; the oil pump is arranged at the upper part of the oil cylinder and is positioned in the shell; the display assembly is positioned on the side surface of the oil cylinder; the display assembly is in control connection with the oil pump;
still include in the gantry frame: a main control MCU with a wireless module and a weighing sensor data port to be measured; one end of the data port of the weighing sensor to be measured is connected with the weighing sensor to be measured;
the master control MCU with the wireless module is connected with the standard weighing sensor and the data port of the weighing sensor to be measured;
the main control MCU with the wireless module is in communication connection with the display assembly;
the oil cylinder is connected with the hydraulic oil cylinder jack through a pipeline; the oil pump controls the flow of the pipeline.
In one embodiment, the cylinder assembly further comprises: fixing a bracket;
the fixed bracket is arranged on the oil cylinder; the oil pump is fixedly arranged on the fixed support.
In one embodiment, the number of the oil pumps is two; the pipe includes: an oil inlet pipeline and an oil outlet pipeline; the oil inlet pipeline consists of an oil inlet valve and an oil inlet pipe; the oil outlet pipeline consists of an oil outlet valve and an oil outlet pipe;
wherein, the oil inlet valve and the oil outlet valve are both one-way valves; the first oil pump controls the oil inlet valve to enable oil to pass through the oil inlet valve and the oil inlet pipe and to reach the hydraulic oil cylinder jack from the oil cylinder; the second oil pump controls the oil outlet valve to enable oil to flow from the oil outlet valve and the oil outlet pipe to the oil cylinder from the hydraulic oil cylinder jack.
In one embodiment, the display assembly comprises: the system comprises a wireless module, an MCU (micro control unit) and a display touch screen and/or input equipment;
the master control MCU with the wireless module is in communication connection with the wireless module;
the display touch screen is used for displaying data and receiving a touch action instruction; the input device is used for inputting parameter quality; and the MCU sends the data parameters corresponding to the touch action instruction to the master control MCU with the wireless module through the wireless module.
In one embodiment, the calibration device further comprises: an upper computer; and the upper computer is in communication connection with the master control MCU with the wireless module.
In one embodiment, the oil pump employs a PID algorithm.
In a second aspect, an embodiment of the present invention further provides a dynamic balance standard force source-based field calibration method for a weighing sensor, where the calibration device described in any one of the above embodiments is used to calibrate the weighing sensor to be measured;
the method comprises the following calibration steps:
s1: setting an operation instruction through the display component, and sending the operation instruction to a master control MCU with a wireless module; the operation instruction is as follows: opening a hydraulic oil cylinder jack to full range force and simultaneously acting on a standard weighing sensor and a weighing sensor to be measured;
s2: the oil pump controls the flow of the pipeline, and the upward movement of a jack of the hydraulic oil cylinder is realized; the method comprises the following steps that a main control MCU with a wireless module simultaneously obtains real-time return data of a data port of a standard weighing sensor and a data port of a weighing sensor to be measured;
s3: sending the real-time return data to a display component; until the pressure of the standard weighing sensor reaches a set value, the oil inlet speed and the oil outlet speed reach dynamic balance, and the pressure detected by the standard weighing sensor does not change; recording the voltage value of a data port of the weighing sensor to be measured; adjusting the sensitivity coefficients of the standard weighing sensor and the weighing sensor to be measured to be the same by adjusting a compensation potentiometer in the sensitivity coefficient compensation junction box;
s4: opening a jack of the hydraulic oil cylinder to a full range, and calibrating a weighing instrument of the weighing sensor to be measured according to the total acting force after the jack is stabilized;
s5: and in the maximum range, gradually loading or unloading the preset range value of the hydraulic oil cylinder jack, and checking whether the precision of the weighing sensor to be measured meets the requirement of the metering standard.
The dynamic balance standard force source based symmetrical weighing sensor field calibration device provided by the embodiment of the invention has the advantages that the device is miniaturized in size and convenient to carry to a field to calibrate a weighing sensor to be measured, and an oil pump is adopted to control the flow of a pipeline, so that dynamic control is realized; and a dynamic balance standard force source is adopted, so that the high measurement precision is ensured. And the data are transmitted back to the display component through the master control MCU with the wireless module, so that data visualization is realized, and the calibration accuracy is improved.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
fig. 1 is a structural diagram of a dynamic balance standard force source based on-site calibration device for a weighing sensor according to an embodiment of the present invention;
fig. 2 is a graph of recorded calibration data provided by an embodiment of the present invention.
In the drawings: 1-shell, 2-fixed bracket, 3-oil pump, 4-oil cylinder, 5-oil inlet valve, 6-oil outlet valve, 7-oil inlet pipe, 8-oil outlet pipe, 9-hydraulic cylinder jack, 10-fixed platform, 12-upper computer, 13-supporting platform, 15-standard weighing sensor, 16-weighing sensor to be measured, and 18-display component.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
Referring to fig. 1, an in-situ calibration apparatus for a symmetric retransmission sensor based on a dynamic balance standard force source according to an embodiment of the present invention includes: gantry frame and cylinder part;
wherein: the inside of the gantry frame is sequentially as follows from bottom to top: aweighing sensor 16 to be measured, a hydraulic oil cylinder jack 9 and astandard weighing sensor 15; the centers of theweighing sensor 16 to be measured, the hydraulic oil cylinder jack 9 and thestandard weighing sensor 15 are all on the same vertical line; thestandard weighing sensor 15 and theweighing sensor 16 to be measured are respectively connected with a sensitivity coefficient compensation junction box;
the hydro-cylinder part includes: theoil pump 3, the oil cylinder 4 and thedisplay component 18 are arranged on theshell 1; theshell 1 is covered on the upper part of the oil cylinder 4; theoil pump 3 is arranged at the upper part of the oil cylinder 4 and is positioned in theshell 1; theshell 1 plays a role in dust prevention and protection, the material of the shell is not limited in the invention, and the shell can be made of transparent glass material for the convenience of clearly seeing the internal structure.
Thedisplay component 18 is positioned on any side surface of the oil cylinder 4, so that the operator can conveniently check and operate the oil cylinder; thedisplay assembly 18 is in control connection with theoil pump 3.
Still include in the gantry frame: a main control MCU with a wireless module and a weighing sensor data port to be measured; the positions of the two are not limited in this embodiment; one end of the data port of the weighing sensor to be measured is connected with theweighing sensor 16 to be measured; the main control MCU with the wireless module is connected with thestandard weighing sensor 15 and a data port of the weighing sensor to be measured; the main control MCU with wireless module is connected with thedisplay component 18 in communication.
The oil cylinder 4 is connected with a hydraulic oil cylinder jack 9 through a pipeline; theoil pump 3 controls the flow rate of the pipe. As shown in fig. 1, the gantry frame is composed of a rectangular closed frame of sufficient mechanical strength and an upper top surface. For example, a main control MCU with a wireless module can be arranged on one side of the gantry frame; thefixed platform 10 between theweighing sensor 16 to be measured and the hydraulic oil cylinder jack 9 can be made of high-strength cast iron, and other high-strength materials can be used. The embodiment of the present disclosure is not limited as long as sufficient mechanical strength can be achieved and calibration of the load cell with a large measurement range can be completed.
A supportingplatform 13 is arranged on the hydraulic oil cylinder jack 9, and astandard weighing sensor 15 is arranged on the upper part of the supportingplatform 13. During the calibration process, the hydraulic jack 9 acts on the standard weighing sensor and the weighing sensor to be measured simultaneously and quantitatively. The weighing sensor data port to be measured arranged on the gantry frame is connected with the weighingsensor 16 to be measured, and the voltage value of the weighingsensor 16 to be measured is read.
The main control MCU with the wireless module is connected with thestandard weighing sensor 15 and a data port of the weighing sensor to be measured; and simultaneously reading the voltage values of the two. Namely: digital signals fed back by standard load cells under different force sources are measured. The main control MCU with the wireless module is in communication connection with thedisplay component 18; the oil cylinder 4 is connected with a hydraulic oil cylinder jack 9 through a pipeline; theoil pump 3 controls the flow rate of the pipe.
In the embodiment, the device is miniaturized in size and convenient to carry to the site to calibrate the weighing sensor to be measured; the device adopts the oil pump to control the flow of the pipeline, realizes dynamic control, and adopts the dynamic balance standard force source, guarantees the high accuracy of measurement. And the data are transmitted back to the display component through the main control MCU with the wireless module, so that data visualization is realized, and the interactivity with a user is enhanced. The parameters are also convenient to set, and the calibration accuracy is improved.
Further, in order to improve the stability of the oil pump, the oil cylinder component further comprises a fixing bracket 2 which is arranged on the oil cylinder 4, and then the oil pump is fixedly arranged on the fixing bracket 2.
In order to further optimize the above scheme, the number of the oil pumps is two, and the above pipeline includes: an oil inlet pipeline and an oil outlet pipeline; the oil inlet pipeline consists of anoil inlet valve 5 and an oil inlet pipe 7; the oil outlet pipeline consists of an oil outlet valve 6 and anoil outlet pipe 8;
one of the oil pumps is used for controlling theoil inlet valve 5, and theother oil pump 3 is used for controlling the oil outlet valve 6. Theoil inlet valve 5 and the oil outlet valve 6 are both one-way valves, and oil can only flow from the hydraulic cylinder 9 to the oil cylinder 4 through the oil outlet valve 6 and theoil outlet pipe 8; similarly, oil can only pass through theoil inlet valve 5 and the oil inlet pipe 7 from the oil cylinder 4 to the hydraulic oil cylinder jack 9.
Thedisplay assembly 18 includes: the system comprises a wireless module, an MCU (micro control unit) and a display touch screen and/or input equipment; the master control MCU with the wireless module is in communication connection with the wireless module; the display touch screen is used for displaying data and receiving touch action instructions, and the input equipment is used for inputting parameter quality. And the MCU sends the data parameters corresponding to the touch action instruction to a main control MCU with a wireless module through the wireless module.
Further, in order to facilitate setting of parameters and improve convenience of interaction, the calibration apparatus further includes: anupper computer 12; after the configuration software with the same function as the configuration software built in thedisplay assembly 18 is installed, the communication connection with the master control MCU with the wireless module can be realized. Thedisplay assembly 18 or theupper computer 12 controls theoil pump 3 to adopt a PID algorithm.
In the calibration process, corresponding parameters are set on theupper computer 12, and the oil quantity passing through theoil inlet valve 5 and the oil outlet valve 6 is controlled by the two oil pumps, so that the force of the hydraulic oil cylinder jack 9 acting on the weighing sensor to be measured is controlled. The loading, unloading or dynamic balance of the oil cylinder is controlled by positive and negative rotation and flow of the oil pump. And the data wire of the weighing sensor to be measured is connected with the data port of the weighing sensor to be measured, and measures voltage signals fed back by the weighing sensor to be measured under different pressures.
The pressure of the weighing sensor to be measured is set on thedisplay component 18 or theupper computer 12, the main control MCU with the wireless module acquires the voltage signal of the data port of the weighing sensor to be measured and the voltage signal of thestandard weighing sensor 15 in real time, the voltage signals are sent to thedisplay component 18, theoil pump 3 is controlled by thedisplay component 18, the PID algorithm is adopted, and meanwhile, the pressure of the weighing sensor to be measured and the pressure of thestandard weighing sensor 15 are detected in real time.
When the pressure of reaction on thestandard weighing sensor 15 is stabilized at the set pressure, the voltage of thestandard weighing sensor 15 and the voltage value returned by the data port of the weighing sensor to be measured are recorded, and the voltage values are returned to thedisplay component 18 and theupper computer 12 through the wireless module to be recorded. And returning the voltage value of the data port of the weighing sensor to be measured to theupper computer 12 and thedisplay assembly 18 with the wireless module for recording. For example, at least 10 different pressure values are taken, the voltage of a data port of the weighing sensor to be measured is used as an independent variable, the pressure of thestandard weighing sensor 15 is used as a dependent variable, and a fitting curve is drawn to finish calibration.
The dynamic balance standard force source based on-site calibration device for the weighing sensor is small in size and convenient to carry to the site to calibrate the weighing sensor to be measured; two oil pumps are adopted to control the oil inlet valve and the oil outlet valve independently, the PID algorithm is adopted to carry out dynamic control, and a dynamic balance standard force source is adopted, so that the high measurement precision is ensured. In addition, the data are transmitted back to the upper computer and the display by the wireless module, the data are visualized, and the interactivity with a user is enhanced.
Based on the calibration device of the above embodiment, the invention further provides a calibration method, which includes the following steps:
s1: setting an operation instruction through the display component, and sending the operation instruction to a master control MCU with a wireless module; the operation instruction is as follows: opening a hydraulic oil cylinder jack to full range force and simultaneously acting on a standard weighing sensor and a weighing sensor to be measured;
s2: the oil pump controls the flow of the pipeline, and the upward movement of a jack of the hydraulic oil cylinder is realized; the method comprises the following steps that a main control MCU with a wireless module simultaneously obtains real-time return data of a data port of a standard weighing sensor and a data port of a weighing sensor to be measured;
s3: sending the real-time return data to a display component; until the pressure of the standard weighing sensor reaches a set value, the oil inlet speed and the oil outlet speed reach dynamic balance, and the pressure detected by the standard weighing sensor does not change; recording the voltage value of a data port of the weighing sensor to be measured; adjusting the sensitivity coefficients of the standard weighing sensor and the weighing sensor to be measured to be the same by adjusting a compensation potentiometer in the sensitivity coefficient compensation junction box;
s4: opening a jack of the hydraulic oil cylinder to a full range, and calibrating a weighing instrument of the weighing sensor to be measured according to the total acting force after the jack is stabilized;
s5: and in the maximum range, gradually loading or unloading the preset range value of the hydraulic oil cylinder jack, and checking whether the precision of the weighing sensor to be measured meets the requirement of the metering standard.
In this embodiment, theload cell 16 to be measured is connected to the load cell data port to be measured. Parameters are set through thedisplay component 18 with the wireless module or the parameters are set through theupper computer 12, and data are sent to the main control MCU with the wireless module through wireless communication. And theoil pump 3 is controlled by adopting a PID algorithm, so that the oil speed passing through theoil inlet valve 5 and the oil outlet valve 6 is controlled, the hydraulic oil cylinder jack 9 moves upwards, meanwhile, thestandard weighing sensor 15 and a data port of the weighing sensor to be measured return data to the MCU with the wireless module in real time, and the MCU with the wireless module sends the data to the weighingdisplay 18 with the wireless module and theupper computer 12.
And the oil inlet speed and the oil outlet speed reach dynamic balance until the pressure of the standard weighing sensor reaches a set value, and the pressure detected by thestandard weighing sensor 15 does not change. And returning the voltage value of the data port of the weighing sensor to be measured to theupper computer 12 and thedisplay component 18 for recording, and adjusting the sensitivity coefficient of the standard weighing sensor to be the same as that of the weighing sensor to be measured by adjusting a compensation potentiometer in the sensitivity coefficient compensation junction box. Opening a jack of the hydraulic oil cylinder to a full range, and calibrating a weighing instrument of the weighing sensor to be measured according to the total acting force after the jack is stabilized; and in the maximum range, gradually loading or unloading the preset range value of the hydraulic oil cylinder jack, and checking whether the precision of the weighing sensor to be measured meets the requirement of the metering standard.
The calibration method provided by the present invention is described in detail below by way of a complete example.
For example, a strain gauge weighing sensor to be measured with the maximum measuring range of 20KN is connected to a data port of the weighing sensor to be measured through a data line.
Inputting the maximum range at thehost computer 12 ordisplay assembly 18, for example, automatically measures 20 points of force by default, such as 1KN, 2KN, 3KN … 20 KN. And after the input is finished, pressing a key for calibration.
The MCU in thedisplay assembly 18 drives the oil pumps 3 which will work simultaneously, one for filling the hydraulic ram jacks 9 and one for pumping. The jack of the hydraulic oil cylinder moves upwards to extrude the weighing sensor to be measured and thestandard weighing sensor 15 mutually. The two generate acting force and reacting force, and simultaneously, the data returned by thestandard weighing sensor 15 is used as the standard, and the data returned by the weighing sensor to be measured is used as the data to be calibrated. The oil inlet and the oil outlet are controlled by using PID (proportion integration differentiation), namely the force given by a hydraulic oil cylinder jack is controlled by using PID, when the data returned by astandard weighing sensor 15 is a set value, the data of a data port of the weighing sensor to be measured at the moment is recorded, and then the data is sent back to anupper computer 12 or adisplay component 18 through a main control MCU (microprogrammed control unit) with a wireless module, as shown in figure 2, the calibration curve example is shown, wherein asensor 1 is a standard weighing sensor, and a sensor 2 is a weighing sensor to be calibrated. And finally, setting the fitting curve of thesensor 1 in the calibration curve to the weighing sensor to be measured to finish calibration. Namely: opening a jack of the hydraulic oil cylinder to a full range, and calibrating a weighing instrument of the weighing sensor to be measured according to the total acting force after the jack is stabilized; and in the maximum range, gradually loading or unloading the preset range value of the hydraulic oil cylinder jack, and checking whether the precision of the weighing sensor to be measured meets the requirement of the metering standard.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (7)
1. A dynamic balance standard force source based on-site calibration device for a weighing sensor is characterized by comprising: gantry frame and cylinder part;
wherein:
the gantry frame is internally provided with the following components from bottom to top: a weighing sensor (16) to be measured, a hydraulic oil cylinder jack (9) and a standard weighing sensor (15); the centers of the weighing sensor (16) to be measured, the hydraulic oil cylinder jack (9) and the standard weighing sensor (15) are all on the same vertical line; the standard weighing sensor (15) and the weighing sensor (16) to be measured are respectively connected with the sensitivity coefficient compensation junction box;
the oil cylinder part comprises: the oil pump comprises a shell (1), an oil pump (3), an oil cylinder (4) and a display assembly (18); the shell (1) is covered on the upper part of the oil cylinder (4); the oil pump (3) is arranged at the upper part of the oil cylinder (4) and is positioned in the shell (1); the display assembly (18) is positioned on the side surface of the oil cylinder (4); the display component (18) is in control connection with the oil pump (3);
still include in the gantry frame: a main control MCU with a wireless module and a weighing sensor data port to be measured; one end of the data port of the weighing sensor to be measured is connected with the weighing sensor (16) to be measured;
the master control MCU with the wireless module is connected with the standard weighing sensor (15) and the data port of the weighing sensor to be measured;
the main control MCU with the wireless module is in communication connection with the display component (18);
the oil cylinder (4) is connected with the hydraulic oil cylinder jack (9) through a pipeline; the oil pump (3) controls the flow of the pipeline.
2. The dynamic balance standard force source based sensor field calibration device as claimed in claim 1, wherein said cylinder assembly further comprises: a fixed bracket (2);
the fixed support (2) is arranged on the oil cylinder (4); the oil pump (3) is fixedly arranged on the fixed support (2).
3. The dynamic balance standard force source based sensor field calibration device as claimed in claim 1, wherein the number of the oil pumps (3) is two; the pipe includes: an oil inlet pipeline and an oil outlet pipeline; the oil inlet pipeline consists of an oil inlet valve (5) and an oil inlet pipe (7); the oil outlet pipeline consists of an oil outlet valve (6) and an oil outlet pipe (8);
wherein, the oil inlet valve (5) and the oil outlet valve (6) are both one-way valves; the first oil pump controls the oil inlet valve (5) to enable oil to pass through the oil inlet valve (5) and an oil inlet pipe (7) and to flow from the oil cylinder (4) to the hydraulic oil cylinder jack (9); the second oil pump controls the oil outlet valve (6) to enable oil to flow from the oil outlet valve (6) and the oil outlet pipe (8) to the oil cylinder (4) from the hydraulic oil cylinder jack (9).
4. The dynamic balance standard force source based sensor for field calibration as recited in claim 1, wherein the display assembly (18) comprises: the system comprises a wireless module, an MCU (micro control unit) and a display touch screen and/or input equipment;
the master control MCU with the wireless module is in communication connection with the wireless module;
the display touch screen is used for displaying data and receiving a touch action instruction; the input device is used for inputting parameter quality; and the MCU sends the data parameters corresponding to the touch action instruction to the master control MCU with the wireless module through the wireless module.
5. The dynamic balance standard force source based sensor field calibration device as claimed in claim 1, wherein said calibration device further comprises: an upper computer (12); the upper computer (12) is in communication connection with the master control MCU with the wireless module.
6. A dynamic balance standard force source based symmetrical weight sensor field calibration device as claimed in any one of claims 1-5, wherein the oil pump (3) adopts PID algorithm.
7. A dynamic balance standard force source based on-site calibration method for a weighing sensor is characterized in that the calibration device according to any one of claims 1 to 6 is adopted to calibrate the weighing sensor to be measured;
the method comprises the following calibration steps:
s1: setting an operation instruction through a display component (18), and sending the operation instruction to a master control MCU with a wireless module; the operation instruction is as follows: opening the jack of the hydraulic oil cylinder to full range force and simultaneously acting on the standard weighing sensor (15) and the weighing sensor (16) to be measured;
s2: the oil pump (3) controls the flow of the pipeline to realize the upward movement of the hydraulic oil cylinder jack (9); the method comprises the following steps that a main control MCU with a wireless module simultaneously obtains real-time return data of a standard weighing sensor (15) and a data port of a weighing sensor to be measured;
s3: sending the real-time return data to a display component (18); until the pressure of the standard weighing sensor (15) reaches a set value, the oil inlet speed and the oil outlet speed reach dynamic balance, and the pressure detected by the standard weighing sensor (15) does not change; recording the voltage value of a data port of the weighing sensor to be measured; adjusting the sensitivity coefficients of the standard weighing sensor and the weighing sensor to be measured to be the same by adjusting a compensation potentiometer in the sensitivity coefficient compensation junction box;
s4: opening the hydraulic oil cylinder jack (9) to a full range, and calibrating a weighing instrument of the weighing sensor (16) to be measured according to the total acting force after the hydraulic oil cylinder jack is stabilized;
s5: and (3) gradually increasing the preset range value of the hydraulic oil cylinder jack (9) in the maximum range, loading or unloading, and checking whether the precision of the weighing sensor (16) to be measured meets the requirement of the metering standard.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112033517A (en)* | 2020-08-26 | 2020-12-04 | 河南省计量科学研究院 | Dynamic calibration method for checkweigher |
| CN112857552A (en)* | 2021-03-08 | 2021-05-28 | 苏州龙双电子科技有限公司 | Weighing sensor calibration system and weighing sensor calibration method |
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| CN112857552A (en)* | 2021-03-08 | 2021-05-28 | 苏州龙双电子科技有限公司 | Weighing sensor calibration system and weighing sensor calibration method |
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