CN115307817A - Pressure sensor batch test system and method thereof - Google Patents
Pressure sensor batch test system and method thereof Download PDFInfo
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- CN115307817A CN115307817A CN202211243594.XA CN202211243594A CN115307817A CN 115307817 A CN115307817 A CN 115307817A CN 202211243594 A CN202211243594 A CN 202211243594A CN 115307817 A CN115307817 A CN 115307817A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L25/00—Testing or calibrating of apparatus for measuring force, torque, work, mechanical power, or mechanical efficiency
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
- B07C5/00—Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
- B07C5/34—Sorting according to other particular properties
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L27/00—Testing or calibrating of apparatus for measuring fluid pressure
Abstract
The invention discloses a system and a method for testing pressure sensors in batches, and belongs to the technical field of pressure sensor batch testing. The method aims to solve the problems that in the prior art, the environment influence is large, the test environment cannot be accurately controlled, and the test result is inaccurate; the product can not be pre-detected, so that the problem that the product is easy to have surface flaws is caused. According to the batch test system and the method for the pressure sensors, accurate positioning is realized, products to be tested are ensured to stay in the area to be tested in the test process, the efficiency of primary test is ensured, products with defective outer pipes are selected out, the products are primarily detected, the quality of the products is improved, temperature and pressure adjustment is effectively achieved by matching with test software, the requirement of test environment adjustment is met, the test accuracy is improved, multiple tests are effectively performed, the performance of finished products of the pressure sensors is improved, and the quality of the pressure sensors is ensured.
Description
Technical Field
The invention relates to the technical field of pressure sensor batch testing, in particular to a pressure sensor batch testing system and a pressure sensor batch testing method.
Background
The sensor technology is one of the high and new technologies and industries which develop fastest internationally;
the pressure sensor needs to be tested in batch in the production process;
the publication number is CN209841279U an absolute pressure sensor's batch test system, the metal test chamber that is used for holding batch test fixture, the pressure controller that is used for controlling the pressure in the metal test chamber, the signal acquisition system that is used for data acquisition and processing and the signal keysets that is used for carrying on the electrical signal to draw forth, the metal test chamber of this system no longer adopts the aviation plug to draw forth the electrical signal, sealing performance is good, can realize the pressurization test simultaneously in batches, the system can work reliably for a long time.
The above system has the following disadvantages in batch testing:
1. in the test, the environmental influence is large, the test environment cannot be accurately controlled, and the test result is inaccurate;
2. the product can not be pre-detected, so that the product is easy to have the problem of surface flaws, and the detection efficiency is influenced due to the fact that the product can not be accurately positioned.
Disclosure of Invention
The invention aims to provide a batch test system and a method for pressure sensors, which effectively realize accurate positioning, ensure that a product to be tested stays in a region to be tested in the test process, ensure the efficiency of primary test, pick out a product with a defective outer pipe, carry out primary test on the product, improve the quality of the product, effectively realize the temperature and pressure adjustment by matching with test software, meet the requirement of test environment adjustment, improve the test accuracy, effectively carry out multi-aspect test, improve the performance of a finished product of the pressure sensor, ensure the quality of the pressure sensor and solve the problems in the prior art.
In order to achieve the purpose, the invention provides the following technical scheme: a pressure sensor batch test system comprises a detection center, wherein the detection center is formed by combining seven subsystems, namely a product moving and transporting module, a positioning system module, a preliminary flaw detection module, an internal test system module, a test environment control module, a multi-path data acquisition module and a virtual instrument hardware module, and the product moving and transporting module is matched with the positioning system module and used for accurately positioning a to-be-tested product when the to-be-tested product moves to a test area;
the primary flaw detection module is used for detecting and selecting the sizes of the products and flaws on the outer pipe, and is matched with the product moving and transporting module to sort in the moving process;
the internal test system module is used for carrying out various tests on a product to be tested, the tests are all completed in the test environment control module, and the test environment control module is matched with the internal test system module for regulation and control so as to ensure that the test environment is normally allocated;
the multi-channel data acquisition module is used for acquiring signals of products to be tested through multiple channels when a plurality of groups of products to be tested are tested;
the virtual instrument hardware module realizes the functions of the instrument by utilizing hardware and software resources of a computer, and realizes a plurality of groups of testing and control functions by software programming, wherein the virtual instrument hardware module comprises a computer module and an instrument hardware module, and the computer module is used for managing internal resources of the instrument hardware module and providing real-time data processing.
Preferably, the product moving and transporting module comprises a transporting belt for transporting the pressure sensor, the transporting belt is driven to move by the driving unit, so that the products to be tested on the transporting belt can move, and the controller of the driving unit is in butt joint with the positioning system module through the single chip microcomputer module;
be provided with infrared induction module in the positioning system module, infrared induction module sets up in treating the detection area, and is connected with single chip module through signal transmission module, is provided with trigger circuit in the single chip module, thereby triggers the drive product through the signal and removes the transportation module operation.
Preferably, the preliminary flaw detection module comprises a photographing module, a transmission module, a processing module, a comparison module and a selection module, wherein the photographing module is used for photographing a product to be tested, the transmission module is used for transmitting picture data into the comparison module to be compared, the comparison module feeds a comparison result back to the processing module, and the processing module controls the selection module to select whether the flaw product is selected according to feedback information.
Preferably, the internal test system module is directed at testing input impedance, output impedance, insulation resistance, zero output and pressure detection to the product to be tested, wherein the instrument required for the above-mentioned test includes universal meter, insulation resistance tester and standard pressure source, and in the test process, the above-mentioned test is all accomplished in the test environment that test environment control module adjusted.
Preferably, the test environment control module comprises a temperature detection module, a temperature control module, a serial port bus and an environment simulation equipment module, wherein during testing, the temperature detection module is used for detecting the temperature in the test environment, the temperature control module is used for controlling the temperature in the environment, and the temperature control module is butted with the internal test system module through the serial port bus and is adjusted according to the test requirement and the standard temperature source;
the temperature detection modules are arranged in multiple groups and are uniformly distributed in an area which can be controlled by a test environment, and the temperature detection modules are connected with the temperature control module in series;
the environment simulation equipment module comprises standard pressure source equipment and standard temperature source equipment, a core component of the standard pressure source equipment is a GY-600 pressure automatic control calibrator, and accurate control over pressure can be achieved through a serial port.
Preferably, the multi-channel data acquisition module comprises a multi-channel matrix switch module, a multiplexer module, an integrated controller module and a digital multimeter module, and the multi-channel matrix switch module build a set of multi-channel data acquisition system for acquiring data when testing a plurality of groups of products to be tested;
the integrated control ware module is used for controlling multichannel matrix switch module, multiplexer module and digital multimeter module, and every group awaits measuring the test product and docks with the multiplexer module through single passageway in the multichannel matrix switch module, and the digital multimeter module docks with virtual instrument hardware module.
Preferably, the instrument hardware module mainly refers to a plurality of interface devices, an instrument driver and a communication module, the interface devices are used for receiving data, the instrument driver drives the instrument to perform detection and analysis, and the detected data is transmitted to the computer module through the communication module.
Preferably, the instrument hardware module can be used for checking instrument communication, setting instrument parameters, modifying operation and realizing instrument functions, and the computer directly participates in the generation of test signals and the analysis of measurement characteristics to complete data input, storage, comprehensive analysis and output.
A method for using a pressure sensor batch test system comprises the following steps: :
s1: the detection device comprises a conveying belt, a driving unit, an infrared induction module, a signal transmission module, a singlechip module, a signal trigger module and a continuous movement instruction, wherein a product to be detected is placed on the conveying belt, the driving unit drives the conveying belt to move, so that the product to be detected on the conveying belt moves, the infrared induction module detects the product to be detected in a region to be detected, when an object is sensed, the infrared induction module is connected with the singlechip module through the signal transmission module, the product movement conveying module is driven to stop moving through signal trigger in the singlechip module, and when the object is not detected, the continuous movement instruction is triggered;
s2: the photographing module photographs a product to be tested, the transmission module transmits and puts photograph data into the comparison module, a product standard data value is stored in the comparison module, whether the product is qualified or not is judged according to comparison of the data values, the judgment structure is fed back to the processing module, and then the processing module controls the selection module to select the product;
s3: detecting whether a circuit of the sensor is correct or not, using an ohmic gear of a multimeter, measuring impedance between input ends and impedance between output ends, if the impedance is infinite, indicating that the sensor has a problem or a pin is not correctly defined, using a voltage gear of the multimeter to detect zero point deviation of the sensor according to zero point output of the sensor under the condition of no pressure application, using a standard pressure source to apply pressure to the sensor, and calibrating the sensor according to the magnitude of the pressure and the variation of an output signal;
s4: the test environment control module is used for providing accurate and standard temperature and pressure rings for batch test of the pressure sensors, and is accessed to a computer and test software through a serial port bus;
s5: the interface equipment is used for butt joint between the detection equipment and the computer and between the detection equipment and the signal acquisition equipment, the test equipment is driven through an instrument driving program and used for testing the pressure sensor to be detected, a detection result is transmitted into the computer, and the computer completes data input, storage, comprehensive analysis and output.
Preferably, the instrument driver consists of a central controller, a test and drive circuit, an instrument, an interface bus, a device to be tested and the like, wherein the central controller is responsible for controlling the whole test process, the test and drive circuit mainly completes the relation between the central controller and the object to be tested and transmits information, and the interface bus organically connects various instrument devices.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention relates to a pressure sensor batch test system and a method thereof, wherein in the prior art, products cannot be pre-detected, so that the problem that the products are easy to have surface defects is caused, the products cannot be accurately positioned, and the detection efficiency is influenced.
2. The invention relates to a batch test system and a method for pressure sensors, wherein the system has low detection efficiency and limited test items in the prior art, the system is adjusted according to the test requirement and aims at a standard temperature source, a plurality of groups of temperature detection modules are arranged and are uniformly distributed in an area which can be controlled by a test environment, the temperature detection modules are all connected with the temperature control module in series, the accurate control of pressure can be realized through a serial port, whether a circuit of the sensor is correct or not is detected, the impedance between input ends and the impedance between output ends are measured by using an ohmic gear of a multimeter, if the impedance is infinite, the problem of the sensor is indicated or the definition of a pin is not judged to be correct, a voltage gear of the multimeter is used for detecting the zero point deviation of the sensor according to the zero point output of the sensor under the condition that no pressure is applied, the zero point output of the sensor is judged, the pressure of the sensor is provided by using a standard pressure source, the sensor is calibrated according to the size of the pressure and the variable quantity of an output signal, so that various tests can be effectively carried out, the finished product performance of the pressure sensor can be improved, and the quality of the pressure sensor can be ensured.
3. The core component of the standard pressure source equipment is a GY-600 pressure automatic control calibrator, and the test environment control module is used for providing accurate and standard temperature and pressure rings for the batch test of the pressure sensors, and is connected with a computer and test software through a serial bus, so that the temperature and pressure adjustment can be effectively realized by matching with the test software, the requirement of the test environment adjustment can be met, and the test accuracy can be improved.
4. The invention relates to a pressure sensor batch test system and a method thereof, wherein in the prior art, a product cannot be tested in multiple items, so that the product quality is poor, the invention utilizes an ohm shift of a universal meter, measures the impedance between input ends and the impedance between output ends, if the impedance is infinite, the problem of the sensor is shown or the definition of a pin is not judged correctly, the voltage shift of the universal meter is used for detecting the zero point deviation of the sensor under the condition of no pressure application according to the zero point output of the sensor, the pressure of the sensor is given by a standard pressure source, the sensor is calibrated according to the pressure and the variation of an output signal, the multi-aspect test is effectively carried out, the finished product performance of the pressure sensor is improved, and the quality of the pressure sensor is ensured.
5. The invention relates to a pressure sensor batch test system and a method thereof, wherein a clear result cannot be known in the prior art, a computer of the invention directly participates in the generation of test signals and the analysis of measurement characteristics to complete the input, storage, comprehensive analysis and output of data, an instrument driving program consists of a central controller, a test and driving circuit, an instrument, an interface bus, a tested device and the like, the central controller is responsible for controlling the whole test process, the test and driving circuit mainly completes the connection and the information transmission between the central controller and the tested object, the interface bus organically connects various instrument devices to complete the exchange and transmission tasks of various information in the system, the interface device is used for butting between a detection device and a computer and a signal acquisition device, the test device is driven by the instrument driving program to be used for testing a pressure sensor to be tested, the detection result is transmitted into the computer, and the computer completes the input, storage, comprehensive analysis and output of data, and the clear and direct result can be known.
Drawings
FIG. 1 is a block diagram of a PCB soldering processing center according to the present invention;
FIG. 2 is a block diagram of the mobile transport module, the positioning system module and the preliminary defect detection module according to the present invention;
FIG. 3 is a block diagram of the internal test system module and the test environment control module according to the present invention;
FIG. 4 is a block diagram of the multi-channel data acquisition module of the present invention;
FIG. 5 is a diagram illustrating the hardware module structure of the virtual instrument according to the present invention;
FIG. 6 is a flow chart of the operation of the system of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, an embodiment of the present invention: a pressure sensor batch test system comprises a detection center, wherein the detection center is formed by combining seven subsystems, namely a product moving and transporting module, a positioning system module, a preliminary flaw detection module, an internal test system module, a test environment control module, a multi-path data acquisition module and a virtual instrument hardware module, and the product moving and transporting module is matched with the positioning system module and used for accurately positioning a to-be-tested product when the to-be-tested product moves to a test area;
the primary flaw detection module is used for detecting and selecting the sizes of the products and flaws on the outer pipe, and is matched with the product moving and transporting module to sort in the moving process;
the internal test system module is used for carrying out various tests on a product to be tested, the tests are all completed in the test environment control module, and the test environment control module is matched with the internal test system module for regulation and control to ensure normal allocation of the test environment;
the multi-channel data acquisition module is used for acquiring signals of a product to be tested through multiple channels when a plurality of groups of products to be tested are tested;
the virtual instrument hardware module realizes the functions of the instrument by utilizing hardware and software resources of a computer and realizes a plurality of groups of testing and controlling functions by software programming, wherein the virtual instrument hardware module comprises a computer module and an instrument hardware module, and the computer module is used for managing internal resources of the instrument hardware module and providing real-time data processing.
Referring to fig. 2, the product moving and transporting module includes a transporting belt for transporting a pressure sensor, the transporting belt is driven by a driving unit to move, so as to move a product to be tested on the transporting belt, a controller of the driving unit is connected with a positioning system module through a single chip module, an infrared sensing module is arranged in the positioning system module, the infrared sensing module is arranged in a region to be tested and connected with the single chip module through a signal transmission module, a trigger circuit is arranged in the single chip module, the product moving and transporting module is driven to operate through signal trigger, the preliminary flaw detection module includes a photographing module, a transmission module, a processing module, a comparison module and a selection module, the photographing module is used for photographing the product to be tested, picture data is transmitted into the comparison module through the transmission module for comparison, and the comparison module feeds back the comparison result to the processing module, the processing module controls the selection module to pick out defective products or not according to the feedback information, test products to be detected are placed on the conveyer belt, the driving unit drives the conveyer belt to move, so that the test products to be detected on the conveyer belt move, the infrared sensing module detects the test products to be detected in the region to be detected, when objects are sensed, the infrared sensing module is connected with the single chip microcomputer module through the signal transmission module, the single chip microcomputer module triggers through signals to drive the product moving and transporting module to stop moving, when objects are not detected, a command of continuous moving is triggered, the photographing module photographs the test products to be detected, the transmission module conveys and brings photograph data into the comparison module, the comparison module stores standard data values of the products, whether the products are qualified or not is judged according to data value comparison, and the judgment structure is fed back to the processing module, and then, the processing module is used for controlling the selection module to select products, so that accurate positioning is realized, the products to be tested are ensured to stay in the detection area in the detection process, the efficiency of preliminary detection is ensured, the products with defective outer pipes are selected, the products are preliminarily detected, and the product quality is improved.
Referring to fig. 3, the internal test system module performs tests for input impedance, output impedance, insulation resistance, zero output and pressure detection of a product to be tested, wherein the instruments required for the tests include a multimeter, an insulation resistance tester and a standard pressure source, the tests are all completed in a test environment adjusted by the test environment control module during the test process, the test environment control module includes a temperature detection module, a temperature control module, a serial bus and an environment simulation equipment module, during the test, the temperature detection module is used for detecting the temperature in the test environment, the temperature control module is used for controlling the temperature in the environment, the temperature control module is butted with the internal test system module through the serial bus, the standard temperature source is adjusted according to the test requirements, and the temperature detection modules are provided with a plurality of groups, evenly distributed is in the region that test environment can be controlled, and multiunit temperature detection module all establishes ties with temperature control module, the accurate control to pressure is realized to the accessible serial ports, detect whether the circuit of sensor is correct, utilize the ohm shelves of universal meter, measure the impedance between the input end, and the impedance between the output, if the impedance is infinity, it is correct that the definition that explains that the sensor has the problem or the pin does not judge, voltage shelves with the universal meter, detect under the condition that does not exert pressure, output according to the zero point of sensor, judge the zero point deviation of sensor, with the pressure source of standard, give sensor pressure, according to the size of pressure and the variable quantity of output signal, calibrate the sensor, effectively carry out many-sided test, improve pressure sensor finished product performance, ensure pressure sensor's quality.
The environment simulation equipment module comprises standard pressure source equipment and standard temperature source equipment, the core component of the standard pressure source equipment is a GY-600 pressure automatic control calibrator, the test environment control module is used for providing accurate and standard temperature and pressure rings for batch test of the pressure sensors, and the test environment control module is accessed into a computer and test software through a serial port bus, so that temperature and pressure adjustment can be effectively achieved by matching with the test software, the requirement of test environment adjustment is met, and the test accuracy is improved.
Referring to fig. 4, the multi-channel data acquisition module includes a multi-channel matrix switch module, a multiplexer module, an integrated controller module and a digital multimeter module, wherein a multi-channel data acquisition system is built by the multi-channel matrix switch module and is used for acquiring data when testing a plurality of groups of products to be tested, the integrated controller module is used for controlling the multi-channel matrix switch module, the multiplexer module and the digital multimeter module, each group of products to be tested is in butt joint with the multiplexer module through a single channel in the multi-channel matrix switch module, the digital multimeter module is in butt joint with a virtual instrument hardware module, during data acquisition, a test signal of each sensor is transmitted to batch test equipment, and is selected by a multi-channel switch, the signals are routed to a test end of the digital multimeter as losslessly as possible, the digital multimeter reads the signals and transmits the signals to an upper computer, the digital multimeter realizes a/D conversion function of the test signals, and the multi-channel matrix switch module has low on resistance and can ensure that the signals are transmitted as losslessly as possible.
Referring to fig. 5, the instrument hardware module mainly refers to a plurality of interface devices, an instrument driver and a communication module, the interface devices are used for receiving data, the instrument driver drives an instrument to perform detection and analysis, the detected data is transmitted to the computer module through the communication module, the instrument hardware module can be used for checking instrument communication, setting instrument parameters, modifying operation and realizing instrument functions, the computer directly participates in generation of test signals and analysis of measurement characteristics, and completes input, storage, comprehensive analysis and output of data, the instrument driver is composed of a central controller, a test and drive circuit, an instrument meter, an interface bus, a tested device and the like, the central controller is used for controlling the whole test process, the test and drive circuit mainly completes the connection and transmission of information between the central controller and a tested object, the interface bus connects various instrument devices together, completes the exchange and transmission tasks of various information inside the system, the interface devices are used for butt-joint between the detection device and the computer and the signal acquisition device, the instrument driver drives the test device to test the pressure sensor to be detected, the detection result is transmitted to the computer, the computer completes the input of the comprehensive analysis and the comprehensive analysis of the data, and the observation and the direct understanding of the result.
Referring to fig. 6, a method for using a batch test system for pressure sensors includes the following steps:
s1: the detection device comprises a conveying belt, a driving unit, an infrared induction module, a signal transmission module, a singlechip module, a signal trigger module and a continuous movement instruction, wherein a product to be detected is placed on the conveying belt, the driving unit drives the conveying belt to move, so that the product to be detected on the conveying belt moves, the infrared induction module detects the product to be detected in a region to be detected, when an object is sensed, the infrared induction module is connected with the singlechip module through the signal transmission module, the product movement conveying module is driven to stop moving through signal trigger in the singlechip module, and when the object is not detected, the continuous movement instruction is triggered;
s2: the photographing module photographs a product to be tested, the transmission module transmits and puts photograph data into the comparison module, a product standard data value is stored in the comparison module, whether the product is qualified or not is judged according to comparison of the data values, the judgment structure is fed back to the processing module, and then the processing module controls the selection module to select the product;
s3: detecting whether a circuit of the sensor is correct or not, using an ohmic gear of a multimeter, measuring impedance between input ends and impedance between output ends, if the impedance is infinite, indicating that the sensor has a problem or a pin is not correctly defined, using a voltage gear of the multimeter to detect zero point deviation of the sensor according to zero point output of the sensor under the condition of no pressure application, using a standard pressure source to apply pressure to the sensor, and calibrating the sensor according to the magnitude of the pressure and the variation of an output signal;
s4: the test environment control module is used for providing accurate and standard temperature and pressure rings for batch test of the pressure sensors, and is accessed to a computer and test software through a serial port bus;
s5: the interface equipment is used for butt joint between the detection equipment and the computer and between the detection equipment and the signal acquisition equipment, the test equipment is driven through an instrument driving program and used for testing the pressure sensor to be detected, a detection result is transmitted into the computer, and the computer completes data input, storage, comprehensive analysis and output.
In summary, the present invention provides a batch test system and method for pressure sensors, wherein a product to be tested is placed on a conveyor belt, a driving unit drives the conveyor belt to move, thereby moving the product to be tested on the conveyor belt, an infrared sensing module detects the product to be tested appearing in the area to be detected, when sensing an object, the infrared sensing module is connected with a single chip module through a signal transmission module, the single chip module triggers a signal to stop moving the product moving and transporting module, when the object is not detected, a command of continuous movement is triggered, a photographing module photographs the product to be tested, a transmission module conveys and picks up photograph data into a comparison module, the comparison module stores a standard data value of the product, compares the data value to determine whether the product is qualified, feeds back a determination structure to a processing module, and controls the selection module to select the product through the processing module, realize accurate positioning, ensure that the product to be tested stays in the area to be detected in the detection process, ensure the efficiency of the initial detection, pick out the product with the defect on the outer pipe, perform the initial detection on the product, improve the product quality, adjust the standard temperature source according to the test requirement, arrange a plurality of groups of temperature detection modules which are uniformly distributed in the area which can be controlled by the test environment, and connect the temperature detection modules in series, realize the accurate control on the pressure through a serial port, detect whether the circuit of the sensor is correct, utilize the ohm gear of a universal meter, measure the impedance between input ends and the impedance between output ends, if the impedance is infinite, indicate that the sensor has problems or the definition of pins is not correct, use the voltage gear of the universal meter to detect under the condition that no pressure is applied, the method comprises the steps of judging the zero point deviation of a sensor according to the zero point output of the sensor, using a standard pressure source to provide pressure for the sensor, calibrating the sensor according to the magnitude of the pressure and the variation of an output signal, effectively testing in multiple aspects, improving the performance of a finished product of the pressure sensor, ensuring the quality of the pressure sensor, providing an accurate and standard temperature and pressure ring for batch testing of the pressure sensor by a core component of standard pressure source equipment, connecting a computer and test software through a serial port bus, effectively adjusting the temperature and the pressure by matching with the test software, meeting the requirement of adjusting the test environment, improving the testing accuracy, utilizing the ohmic contact of a universal meter, the impedance between a quantity input end and the impedance between output ends, and if the impedance is infinite, the problem of the sensor is shown or the definition of the pin is not judged correctly, the voltage level of the multimeter is used for detecting under the condition of no pressure, the zero point deviation of the sensor is judged according to the zero point output of the sensor, the pressure is given to the sensor by using a standard pressure source, the sensor is calibrated according to the magnitude of the pressure and the variation of an output signal, the multi-aspect test is effectively carried out, the finished product performance of the pressure sensor is improved, the quality of the pressure sensor is ensured, a computer directly participates in the generation of a test signal and the analysis of the measurement characteristic, the input, the storage, the comprehensive analysis and the output of data are completed, an instrument driving program comprises a central controller, a test and driving circuit, an instrument, an interface bus, a tested device and the like, the central controller is responsible for controlling the whole test process, the test and driving circuit mainly completes the relation and the information transmission between the central controller and the tested object, the interface bus organically connects various instruments and equipment to complete the exchange and transmission tasks of various information in the system, the interface equipment is used for butt joint between the detection equipment and the computer and between the detection equipment and the signal acquisition equipment, the test equipment is driven by an instrument driving program and used for testing the pressure sensor to be detected, the detection result is transmitted into the computer, and the computer completes the input, storage, comprehensive analysis and output of data, so that the result is clearly and intuitively understood.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. A pressure sensor batch test system comprises a detection center and is characterized in that the detection center is formed by combining seven subsystems including a product moving and transporting module, a positioning system module, a preliminary flaw detection module, an internal test system module, a test environment control module, a multi-path data acquisition module and a virtual instrument hardware module, wherein the product moving and transporting module is matched with the positioning system module and used for accurately positioning a to-be-tested product when the to-be-tested product moves to a test area;
the primary flaw detection module is used for detecting and selecting the sizes of the products and flaws on the outer pipe, and is matched with the product moving and transporting module to sort in the moving process;
the internal test system module is used for carrying out various tests on a product to be tested, the tests are all completed in the test environment control module, and the test environment control module is matched with the internal test system module for regulation and control to ensure normal allocation of the test environment;
the multi-channel data acquisition module is used for acquiring signals of a product to be tested through multiple channels when a plurality of groups of products to be tested are tested;
the virtual instrument hardware module realizes the functions of the instrument by utilizing hardware and software resources of a computer and realizes a plurality of groups of testing and controlling functions by software programming, wherein the virtual instrument hardware module comprises a computer module and an instrument hardware module, and the computer module is used for managing internal resources of the instrument hardware module and providing real-time data processing.
2. The batch test system of pressure sensors of claim 1, wherein: the product moving and transporting module comprises a transporting belt for transporting the pressure sensor, the transporting belt is driven to move by the driving unit, a product to be tested on the transporting belt is moved, and a controller of the driving unit is in butt joint with the positioning system module through the single chip microcomputer module;
be provided with infrared induction module in the positioning system module, infrared induction module sets up in treating the detection area, and is connected with single chip module through the signal transmission module, is provided with trigger circuit in the single chip module, triggers the operation of drive product removal transport module through the signal.
3. The batch test system of pressure sensors of claim 2, wherein: the preliminary flaw detection module comprises a photographing module, a transmission module, a processing module, a comparison module and a selection module, wherein the photographing module is used for photographing a product to be tested, the transmission module is used for transmitting picture data to the comparison module to be compared, the comparison module feeds comparison results back to the processing module, and the processing module controls the selection module to select whether the flaw product is picked out or not according to feedback information.
4. The batch test system of pressure sensors of claim 3, wherein: the internal test system module carries out input impedance, output impedance, insulation resistance, zero output and pressure detection to the product to be tested and tests, wherein the instrument that the test needs includes universal meter, insulation resistance tester and standard pressure source, and the test procedure all accomplishes in the test environment that test environment control module group adjusted.
5. The batch test system of pressure sensors of claim 4, wherein: the test environment control module comprises a temperature detection module, a temperature control module, a serial port bus and an environment simulation equipment module, wherein during testing, the temperature detection module is used for detecting the temperature in the test environment, the temperature control module is used for controlling the temperature in the environment, the temperature control module is butted with the internal test system module through the serial port bus, and a standard temperature source is adjusted according to the test requirement;
the temperature detection modules are arranged in a plurality of groups and are uniformly distributed in an area which can be controlled by a test environment, and the temperature detection modules are all connected with the temperature control module in series;
the environment simulation equipment module comprises standard pressure source equipment and standard temperature source equipment, a core component of the standard pressure source equipment is a GY-600 pressure automatic control calibrator, and pressure can be accurately controlled through a serial port.
6. The batch test system of pressure sensors of claim 5, wherein: the multichannel data acquisition module comprises a multichannel matrix switch module, a multiplexer module, an integrated controller module and a digital multimeter module, and the multichannel matrix switch module build a multichannel data acquisition system for acquiring data when a plurality of groups of products to be tested are tested;
the integrated controller module is used for controlling the multi-channel matrix switch module, the multiplexer module and the digital multimeter module, each group of products to be tested is in butt joint with the multiplexer module through a single channel in the multi-channel matrix switch module, and the digital multimeter module is in butt joint with the virtual instrument hardware module.
7. The batch test system of pressure sensors of claim 6, wherein: the instrument hardware module comprises various interface devices, an instrument driving program and a communication module, wherein the interface devices are used for receiving data, the instrument driving program drives the instrument to perform detection and analysis, and the detected data are transmitted to the computer module through the communication module.
8. The batch test system of pressure sensors of claim 7, wherein: the instrument hardware module is used for checking instrument communication, setting instrument parameters, modifying operation and realizing instrument functions, and the computer directly participates in the generation of test signals and the analysis of measurement characteristics to complete data input, storage, comprehensive analysis and output.
9. A method for batch testing pressure sensors, which is implemented based on the batch testing system for pressure sensors in any one of claims 1-8, and comprises the following steps:
s1: the detection device comprises a conveying belt, a driving unit, an infrared induction module, a signal transmission module, a singlechip module, a signal trigger module and a continuous movement instruction, wherein a product to be detected is placed on the conveying belt, the driving unit drives the conveying belt to move so as to enable the product to be detected on the conveying belt to move, the infrared induction module detects the product to be detected in a region to be detected, when an object is sensed, the infrared induction module is connected with the singlechip module through the signal transmission module, the product is driven to move through signal trigger in the singlechip module so as to stop moving, and when the object is not detected, the continuous movement instruction is triggered;
s2: the photographing module photographs a product to be tested, the transmission module transmits the photograph data to the comparison module, the comparison module stores a product standard data value, whether the product is qualified is judged according to the comparison of the data values, the judgment structure is fed back to the processing module, and the processing module controls the selection module to select the product;
s3: detecting whether a circuit of the sensor is correct or not, using an ohmic gear of a multimeter, measuring impedance between input ends and impedance between output ends, if the impedance is infinite, indicating that the sensor has a problem or a pin is not correctly defined, using a voltage gear of the multimeter to detect zero point deviation of the sensor according to zero point output of the sensor under the condition of no pressure application, using a standard pressure source to apply pressure to the sensor, and calibrating the sensor according to the magnitude of the pressure and the variation of an output signal;
s4: the test environment control module is used for providing accurate and standard temperature and pressure rings for batch test of the pressure sensors, and is accessed to a computer and test software through a serial port bus;
s5: the interface equipment is used for butt joint between the detection equipment and the computer and between the detection equipment and the signal acquisition equipment, the test equipment is driven through an instrument driving program and used for testing the pressure sensor to be detected, a detection result is transmitted into the computer, and the computer completes data input, storage, comprehensive analysis and output.
10. The method of using a batch test system of pressure sensors of claim 9, wherein: the instrument driving program consists of a central controller, a test and driving circuit, an instrument, an interface bus and a tested device, wherein the central controller is responsible for controlling the whole test process, the test and driving circuit completes the connection between the central controller and the tested object and transmits information, and the interface bus connects various instrument devices.
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Application publication date: 20221108 |