Full-automatic verification system for air pressure sensor

Abstract

The invention provides a full-automatic verification system for an air pressure sensor, and relates to the technical field of sensor verification. The system comprises an automatic operation control device, a conveying platform, a verification platform, an automatic grabbing device, a communication interface automatic butt joint / disconnection device, a gas path automatic connection / disconnection device, an automatic pressure control device, a sensor information acquisition device, a gas path device and a verification standard device, wherein the automatic operation control device is connected with a main control computer and a multi-path serial port communication device. And the automatic operation control device is connected with the conveying platform, the automatic grabbing device and the communication interface automatic butt joint / disconnection device. And the main control computer sends a verification instruction and collects a verification result of the to-be-tested baroceptor. The automatic grabbing device is used for grabbing the air pressure sensor to be detected from the conveying platform to the verification platform. The automatic pressure control device controls air pressure output according to a pressure regulating instruction, and the air path device ensures air circulation. The system solves the problem of low calibration efficiency of the air pressure sensor in the prior art.

Description

Technical Field

[0001] The present invention relates to the technical field of sensor verification, and in particular to a full-automatic verification system for an air pressure sensor. Background Art

[0002] In order to avoid the impact caused by the reduction of measurement accuracy of the air pressure sensor during long-term use, it is generally necessary to perform periodic calibration on the air pressure sensor regularly.

[0003] At present, the solution used in China to calibrate air pressure sensors is generally a traditional method. For example, for the PTB330 air pressure sensor, manual wiring and air path connection are required each time. This is acceptable for small batches of air pressure sensors, but for large batches of air pressure sensors, it requires a lot of manpower and time, which is a certain distance from the high-quality goal of full automation. Not only is the workload of the calibrators huge, but the calibration efficiency is also very low. Summary of the Invention

[0004] In order to overcome the deficiencies of the prior art, the purpose of the present invention is to provide a fully automatic calibration system for an air pressure sensor, which solves the problem of low calibration efficiency of air pressure sensors in the prior art.

[0005] To achieve the above object, the present invention provides the following solutions:

[0006] A fully automatic calibration system for an air pressure sensor, comprising:

[0007] A main control computer, a multi-channel serial port communication device and an automatic operation control device connected to the multi-channel serial port communication device, a conveying platform, a calibration platform, an automatic component grabbing device, a communication interface automatic docking / disconnection device, an automatic gas line connection / disconnection device, an automatic pressure control device, a sensor information acquisition device, a gas line device, and a calibration standard;

[0008] The automatic operation control device is connected to the conveying platform, the automatic gripping device and the communication interface automatic docking / disconnection device; the gas line automatic connection / disconnection device is connected to the automatic pressure control device, the calibration standard and the sensor to be tested; the conveying platform is connected to the calibration platform;

[0009] The main control computer is used to issue calibration instructions, pressure adjustment instructions and collect the calibration results of the air pressure sensor to be tested, and output a calibration report. The automatic operation control device is used to receive the calibration instructions sent by the multi-channel serial port communication device and control the automatic grabbing device, the automatic docking / disconnection of the communication interface, the conveying platform, and the automatic air path connection / disconnection device to perform automatic operation according to the calibration instructions. The conveying platform is used to transmit the air pressure sensor to be tested to the calibration platform. The automatic grabbing device is used to grab the air pressure sensor to be tested on the conveying platform to the calibration platform. The communication interface automatic docking / disconnection device is used to automatically connect and disconnect the electrical connection of the air pressure sensor during the calibration process. The air path automatic connection / disconnection device is used to ensure the smoothness of the air path. The automatic pressure control device is used to control the output of the air pressure according to the pressure adjustment instruction. The sensor information acquisition device is used to collect the performance parameters of the air pressure sensor to be tested and transmit them to the main control computer through the multi-channel serial port communication device. The calibration standard is used to provide an air pressure detection standard. The air path device is used to achieve air pressure communication between the automatic pressure control device, the calibration standard, and the air pressure sensor to be tested.

[0010] Preferably, the performance parameters include:

[0011] Sensor model, factory serial number, and manufacturer.

[0012] Preferably, the automatic grabbing device comprises:

[0013] Instrument gripping mechanisms, sensor positioning devices and guide rails;

[0014] The instrument grabbing mechanism is used to grab the air pressure sensor to be tested on the conveying platform to the calibration platform, or to grab the air pressure sensor to be tested on the calibration platform to the conveying platform after the calibration is completed. The sensor positioning device is used to sense the position of the air pressure sensor to be tested, and the guide rail is used for the left and right movement of the instrument grabbing mechanism.

[0015] Preferably, the communication interface automatic docking / disconnection device includes:

[0016] Communication interface docking mechanism and communication interface disconnection mechanism;

[0017] The communication interface docking mechanism is used to automatically connect the wiring plug on the calibration platform and the wiring socket of the air pressure sensor before the calibration begins, and the communication interface disconnection mechanism is used to disconnect the wiring plug and the wiring socket of the air pressure sensor after the calibration is completed.

[0018] Preferably, the gas path automatic connection / disconnection device comprises:

[0019] Gas circuit opening device, gas circuit closing device, gas circuit docking device and gas circuit disconnecting device;

[0020] The air circuit opening device is used to open the corresponding air circuit on the air circuit pipeline before the calibration begins. The air circuit automatic docking device is used to dock with the air nozzle of the positioned air pressure sensor before the calibration begins. The air circuit closing device is used to disconnect the air circuit pipeline from the air nozzle of the air pressure sensor to be tested after the calibration is completed. The air circuit closing device is used to close the corresponding air circuit on the air circuit pipeline after the calibration is completed.

[0021] Preferably, the automatic operation control device is installed in a control cabinet.

[0022] The present invention discloses the following technical effects:

[0023] The present invention provides a fully automatic calibration system for an air pressure sensor, comprising:

[0024] A main control computer, a multi-channel serial port communication device and an automatic operation control device connected to the multi-channel serial port communication device, a conveying platform, a calibration platform, an automatic grasping device, a communication interface automatic docking / disconnecting line device, an air path automatic connecting / disconnecting device, an automatic pressure control device, a sensor information acquisition device, an air path device, and a calibration standard; the fully automatic calibration system for air pressure sensors can complete operations such as automatic acquisition of information of batch air pressure sensors, automatic transmission and grasping, automatic docking and removal of signal lines, automatic docking and disconnection of air paths, and automatic opening and closing of air paths according to the automatic control device, and complete full-range automatic calibration of air pressure sensors according to the automatic calibration control program of the main control computer. The entire process from placing the air pressure sensor on the calibration platform to conveying the air pressure sensor to the designated area after the calibration does not require manual intervention, and is fully capable of realizing fully automated batch calibration of air pressure sensors, greatly improving calibration efficiency and greatly reducing the workload of calibration personnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0026] Figure 1 A schematic diagram of the structure of a fully automatic calibration system for an air pressure sensor provided by an embodiment of the present invention;

[0027] Figure 2 A fully automatic calibration system for an air pressure sensor provided by an embodiment of the present invention is integrated into a schematic diagram of a robot structure. DETAILED DESCRIPTION

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0029] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0030] like Figure 1 As shown, the present invention provides a fully automatic calibration system for an air pressure sensor, comprising:

[0031] A main control computer, a multi-channel serial port communication device and an automatic operation control device connected to the multi-channel serial port communication device, a conveying platform, a calibration platform, an automatic component grabbing device, a communication interface automatic docking / disconnection device, an automatic gas line connection / disconnection device, an automatic pressure control device, a sensor information acquisition device, a gas line device, and a calibration standard;

[0032] The automatic operation control device is connected to the conveying platform, the automatic gripping device and the communication interface automatic docking / disconnection device; the gas line automatic connection / disconnection device is connected to the automatic pressure control device, the calibration standard and the sensor to be tested; the conveying platform is connected to the calibration platform;

[0033] The main control computer is used to issue calibration instructions, pressure adjustment instructions and collect the calibration results of the air pressure sensor to be tested, and output a calibration report. The automatic operation control device is used to receive the calibration instructions sent by the multi-channel serial port communication device and control the automatic grabbing device, the automatic docking / disconnection of the communication interface, the conveying platform, and the automatic air path connection / disconnection device to perform automatic operation according to the calibration instructions. The conveying platform is used to transmit the air pressure sensor to be tested to the calibration platform. The automatic grabbing device is used to grab the air pressure sensor to be tested on the conveying platform to the calibration platform. The communication interface automatic docking / disconnection device is used to automatically connect and disconnect the electrical connection of the air pressure sensor during the calibration process. The air path automatic connection / disconnection device is used to ensure the smoothness of the air path. The automatic pressure control device is used to control the output of the air pressure according to the pressure adjustment instruction. The sensor information acquisition device is used to collect the performance parameters of the air pressure sensor to be tested and transmit them to the main control computer through the multi-channel serial port communication device. The calibration standard is used to provide an air pressure detection standard. The air path device is used to achieve air pressure communication between the automatic pressure control device, the calibration standard, and the air pressure sensor to be tested.

[0034] Specifically, the main control computer serves as the operation control terminal of the fully automatic calibration and is installed with an automatic calibration control program and operation interface. The control program can control the automatic operation control device to perform fully automatic operations on the conveying platform, automatic grabbing device, communication interface automatic docking / disconnection device, gas line automatic connection / disconnection device, and gas line automatic opening / closing device, that is, the conveying platform automatically transports the air pressure sensor, grabs the air pressure sensor from the conveying platform and places it on the calibration platform, automatically connects and docks the air source, and automatically removes the wires and separates the air source after the calibration is completed and transports it to the designated area; it can also control the automatic pressure control device to adjust and control the pressure value according to the calibration procedures, automatically read the calibration standard and the pressure value corresponding to the sensor being tested at each calibration point through the multi-channel serial communication device, automatically calculate the error value, and finally output the calibration record sheet and calibration results.

[0035] Furthermore, the performance parameters include:

[0036] Sensor model, factory serial number, and manufacturer.

[0037] Specifically, the conveying platform is composed of an automatic conveying device, the air pressure sensor is placed on the conveying platform, the air pressure sensor calibration program is started, the automatic conveying device transports the air pressure sensor to the designated area, and the air pressure sensor information reading device automatically reads the sensor model, factory number, manufacturer and other parameter information in turn. After the main control computer program receives the first sensor information, it is transmitted to the automatic operation control device to control the automatic conveying device to move in sequence until the last air pressure sensor information is collected. The automatic conveying device transports the air pressure sensor to the calibration area. After the above operations are completed, the air pressure sensor calibration program automatically selects the calibration plan.

[0038] After the main control computer reads the air pressure sensor parameter information and the calibration plan, the sensor positioning device on the automatic gripping device senses the arrival of an instrument in the calibration area. The automatic operation control device controls the automatic gripping device to complete the gripping of the air pressure sensor onto the calibration platform. The automatic operation control device then controls the communication interface automatic docking / disconnection device and the gas line automatic connection / disconnection device to complete the wiring and gas line connection operations of the air pressure sensor. After the first air pressure sensor completes the connection operation, the automatic operation control device controls the automatic gripping device, the communication interface automatic docking / disconnection device, and the gas line automatic connection / disconnection device to move in the opposite direction (opposite to the direction of the transmission platform) until the sensor positioning device senses the air pressure sensor. The above operation is repeated to complete the connection of the second air pressure sensor. The operation is repeated until the connection of the last air pressure sensor is completed. The automatic operation control device controls the above devices to return to the starting point, that is, the position corresponding to the first air pressure sensor.

[0039] After the main control computer completes the above operations, it controls the automatic pressure control device to perform automatic calibration according to the selected calibration plan, and automatically reads the air pressure values corresponding to the calibration standard and the sensor being tested at each calibration point and automatically calculates the error value. After the calibration is completed, it automatically outputs the calibration record sheet and calibration results.

[0040] After the main control computer completes the calibration task, it transmits a command to the automatic operation control device to control the communication interface automatic docking / disconnection device and the gas line automatic connection / disconnection device to remove the wires and disconnect the gas line of the first air pressure sensor. The automatic grasping device then grabs the air pressure sensor and places it on the conveying platform. After the first air pressure sensor is disassembled, the automatic operation control device controls the automatic grasping device, the communication interface automatic docking / disconnection device, and the gas line automatic connection / disconnection device to move in the opposite direction (opposite to the direction of the conveying platform) until the sensor positioning device senses the air pressure sensor. The above operation is repeated to complete the disassembly of the second air pressure sensor. The operation is continued until the last air pressure sensor is disassembled. The automatic operation control device then controls the above devices to return to the starting position, which is the position corresponding to the first air pressure sensor. The automatic operation control device controls the automatic conveying system to transport the air pressure sensor to the designated area.

[0041] Furthermore, the automatic grabbing device includes:

[0042] Instrument gripping mechanisms, sensor positioning devices and guide rails;

[0043] The instrument grabbing mechanism is used to grab the air pressure sensor to be tested on the conveying platform to the calibration platform, or to grab the air pressure sensor to be tested on the calibration platform to the conveying platform after the calibration is completed. The sensor positioning device is used to sense the position of the air pressure sensor to be tested, and the guide rail is used for the left and right movement of the instrument grabbing mechanism.

[0044] Specifically, the automatic gripping device includes an instrument gripping mechanism, a sensor positioning device, and a guide rail. The instrument gripping mechanism grabs the air pressure sensor on the conveyor platform and moves it to the calibration platform. After calibration, the sensor is moved back to the conveyor platform. The sensor positioning device accurately senses the position of the air pressure sensor, and the guide rail allows the instrument gripping mechanism to move left and right.

[0045] Furthermore, the communication interface automatic docking / disconnection device includes:

[0046] Communication interface docking mechanism and communication interface disconnection mechanism;

[0047] The communication interface docking mechanism is used to automatically connect the wiring plug on the calibration platform and the wiring socket of the air pressure sensor before the calibration begins, and the communication interface disconnection mechanism is used to disconnect the wiring plug and the wiring socket of the air pressure sensor after the calibration is completed.

[0048] Specifically, the automatic communication interface docking / disconnection device includes a communication interface docking and disconnecting mechanism. Before calibration begins, the sensor positioning device secures and positions the air pressure sensor. The communication interface docking mechanism automatically connects the wiring plug on the calibration platform to the wiring socket of the air pressure sensor, and so on, completing the wiring of all sensors. After calibration is completed, the communication interface disconnection mechanism disconnects the wiring plug from the wiring socket of the air pressure sensor, and so on, completing the removal of all sensors.

[0049] Furthermore, the gas path automatic connection / disconnection device includes:

[0050] Gas circuit opening device, gas circuit closing device, gas circuit docking device and gas circuit disconnecting device;

[0051] The air circuit opening device is used to open the corresponding air circuit on the air circuit pipeline before the calibration begins. The air circuit automatic docking device is used to dock with the air nozzle of the positioned air pressure sensor before the calibration begins. The air circuit closing device is used to disconnect the air circuit pipeline from the air nozzle of the air pressure sensor to be tested after the calibration is completed. The air circuit closing device is used to close the corresponding air circuit on the air circuit pipeline after the calibration is completed.

[0052] Specifically, the automatic gas circuit connection / disconnection device includes a gas circuit opening / closing device and a gas circuit automatic docking / disconnecting device. Before the calibration begins, the gas circuit opening device opens the corresponding gas circuit on the gas circuit pipeline, and the automatic gas circuit docking device docks with the positioned air pressure sensor's air nozzle. This process continues, completing the gas circuit docking of all sensors. After the calibration is completed, the automatic gas circuit disconnection device disconnects the gas circuit pipeline from the air pressure sensor's air nozzle, and the gas circuit closing device closes the corresponding gas circuit on the gas circuit pipeline. This process continues, completing the gas circuit disconnection of all sensors.

[0053] Furthermore, the automatic pressure control device is an automatic pressure generating device;

[0054] The automatic pressure generating device is used to control the generation of positive / negative air source according to the pressure regulation instruction so that the air pressure reaches the calibration point and stabilizes.

[0055] Specifically, the automatic pressure control device includes an automatic pressure generating device, a positive air source, and a negative air source. The automatic pressure generating device controls the generation of positive / negative air sources according to the calibration point set by the main control computer calibration program so that the air pressure reaches the calibration point and stabilizes. The output air path of the automatic pressure generating device is connected to the calibration standard and the air pressure sensor through the air path device. The calibration standard communicates with the main control computer, and its output value is used to determine whether the air pressure sensor is qualified. The calibration standard is placed on the calibration platform at the same height as the air pressure sensor to eliminate errors caused by height differences during the calibration process.

[0056] The multi-channel serial port communication device is respectively connected to the main control computer, the automatic operation control device, the transmission platform, the automatic grasping device, the communication interface automatic docking / disconnection device, the gas line automatic connection / disconnection device, the automatic pressure control device, the sensor information acquisition device, the calibration standard, and the sensor being tested to achieve information exchange.

[0057] The gas circuit device is respectively connected with the automatic pressure control device, the calibration standard and the air pressure sensor to realize gas circuit communication.

[0058] The main control computer is installed on the operating table, the automatic operation control device is installed in the control cabinet, the automatic gripping device, the communication interface automatic docking / disconnection device, and the gas line automatic connection / disconnection device are installed on the guide rail, and the automatic pressure control device, multi-channel serial port communication device, calibration standard, and gas line device are installed on the calibration platform.

[0059] Furthermore, the present invention also provides another embodiment, such as Figure 2 As shown, the automatic grasping device, the communication interface automatic docking / disconnection device, the air path automatic connection / disconnection device and the sensor information acquisition device are integrated on the robot's robotic arm, and the control program of the main control computer sends commands to the robot to realize operations such as obtaining information from the air pressure sensor, grasping the air pressure sensor to the calibration platform, automatically connecting and disconnecting the air pressure sensor communication interface, automatically opening and closing the air path interface, and automatically docking and disconnecting the air pressure sensor air path.

[0060] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0061] This document uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. At the same time, those skilled in the art will find that the specific implementation methods and application scopes may vary based on the concept of the present invention. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims

1. A fully automatic calibration system for air pressure sensors, characterized in that: include: A main control computer, a multi-channel serial port communication device and an automatic operation control device connected to the multi-channel serial port communication device, a conveying platform, a calibration platform, an automatic component grabbing device, a communication interface automatic docking / disconnection device, an automatic gas line connection / disconnection device, an automatic pressure control device, a sensor information acquisition device, a gas line device, and a calibration standard; The automatic operation control device is connected to the conveying platform, the automatic gripping device and the communication interface automatic docking / disconnection device; the gas line automatic connection / disconnection device is connected to the automatic pressure control device, the calibration standard and the sensor to be tested; the conveying platform is connected to the calibration platform; The main control computer is used to issue calibration instructions, pressure adjustment instructions and collect the calibration results of the air pressure sensor to be tested, and output a calibration report. The automatic operation control device is used to receive the calibration instructions sent by the multi-channel serial port communication device and control the automatic grabbing device, the automatic docking / disconnection of the communication interface, the conveying platform, and the automatic air path connection / disconnection device to perform automatic operation according to the calibration instructions. The conveying platform is used to transmit the air pressure sensor to be tested to the calibration platform. The automatic grabbing device is used to grab the air pressure sensor to be tested on the conveying platform to the calibration platform. The communication interface automatic docking / disconnection device is used to automatically connect and disconnect the electrical connection of the air pressure sensor during the calibration process. The air path automatic connection / disconnection device is used to ensure the smoothness of the air path. The automatic pressure control device is used to control the output of the air pressure according to the pressure adjustment instruction. The sensor information acquisition device is used to collect the performance parameters of the air pressure sensor to be tested and transmit them to the main control computer through the multi-channel serial port communication device. The calibration standard is used to provide an air pressure detection standard. The air path device is used to achieve air pressure communication between the automatic pressure control device, the calibration standard, and the air pressure sensor to be tested.

2. The fully automatic calibration system for air pressure sensors according to claim 1, characterized in that: The performance parameters include: Sensor model, factory serial number, and manufacturer.

3. The fully automatic calibration system for air pressure sensors according to claim 1, characterized in that: The automatic grabbing device comprises: Instrument gripping mechanisms, sensor positioning devices and guide rails; The instrument grabbing mechanism is used to grab the air pressure sensor to be tested on the conveying platform to the calibration platform, or to grab the air pressure sensor to be tested on the calibration platform to the conveying platform after the calibration is completed. The sensor positioning device is used to sense the position of the air pressure sensor to be tested, and the guide rail is used for the left and right movement of the instrument grabbing mechanism.

4. The fully automatic calibration system for air pressure sensors according to claim 1, characterized in that: The communication interface automatic docking / disconnection device includes: Communication interface docking mechanism and communication interface disconnection mechanism; The communication interface docking mechanism is used to automatically connect the wiring plug on the calibration platform and the wiring socket of the air pressure sensor before the calibration begins, and the communication interface disconnection mechanism is used to disconnect the wiring plug and the wiring socket of the air pressure sensor after the calibration is completed.

5. The fully automatic calibration system for air pressure sensors according to claim 4, characterized in that: The gas path automatic connection / disconnection device comprises: Gas circuit opening device, gas circuit closing device, gas circuit docking device and gas circuit disconnecting device; The air circuit opening device is used to open the corresponding air circuit on the air circuit pipeline before the calibration begins. The air circuit automatic docking device is used to dock with the air nozzle of the positioned air pressure sensor before the calibration begins. The air circuit closing device is used to disconnect the air circuit pipeline from the air nozzle of the air pressure sensor to be tested after the calibration is completed. The air circuit closing device is used to close the corresponding air circuit on the air circuit pipeline after the calibration is completed.

6. The fully automatic calibration system for air pressure sensors according to claim 4, characterized in that: The automatic operation control device is installed in the control cabinet.

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