Control methods, controllers, and pressure generators for pressure generators

Abstract

This application proposes a control method, controller, and pressure generator for a pressure generator. The pressure generator includes a signal detection module, a pressure output interface, and a pressure generation module. First, it receives a detection command for detecting a sensor under test. Then, it determines a target test mode based on the detection command. Based on the target test mode, it connects the signal detection module to the pressure output interface to generate a target pressure. When the target pressure is greater than or equal to a preset pressure value, the control signal detection module detects the sensor under test, obtaining the sensor's output signal. This application allows for flexible selection of the target test mode based on different detection commands, enabling diversified and precise sensor detection. Detection only occurs when the target pressure reaches a preset requirement, improving the accuracy and reliability of the detection results.

Description

Technical Field

[0001] This application relates to the field of pressure generator technology, and in particular to a control method, controller, and pressure generator for a pressure generator. Background Technology

[0002] In related technologies, pressure sensors are widely used in various equipment and systems across numerous industries and fields, including military, aviation, aerospace, power, petroleum, chemical, metallurgy, railway, metrology, food, and machinery manufacturing, for the precise measurement of pressure parameters. However, some high-precision pressure sensors cannot meet the requirements for accurately simulating subtle pressure changes, potentially leading to deviations in the test results and affecting the accurate evaluation of sensor performance. Summary of the Invention

[0003] This application aims to at least solve one of the technical problems existing in the prior art. To this end, this application proposes a control method, controller, and pressure generator for a pressure generator, aiming to improve the accuracy of sensor detection results.

[0004] In a first aspect, embodiments of this application provide a control method for a pressure generator, the pressure generator including a signal detection module, a pressure output interface, and a pressure generation module; the signal detection module includes a first detection device and a second detection device, wherein the first detection device includes a first standard sensor, and the second detection device includes a second standard sensor, the method comprising:

[0005] Receive detection commands for detecting the sensor under test;

[0006] The target test mode is determined according to the detection command, wherein the target test mode includes one of the following: pneumatic mode and hydraulic mode;

[0007] Based on the target test mode, the signal detection module is connected to the pressure output interface so that the pressure generation module generates the target pressure.

[0008] When the target pressure value is greater than or equal to the preset pressure value, the signal detection module is controlled to detect the sensor under test and obtain the output signal of the sensor under test.

[0009] The control of the signal detection module to detect the sensor under test includes:

[0010] When the target test mode is barometric mode, the first detection device is controlled to detect the sensor under test, and the range of the first standard sensor is greater than or equal to the first value and less than or equal to the second value.

[0011] When the target test mode is hydraulic mode, the second detection device is controlled to detect the sensor under test, and the range of the second standard sensor is greater than or equal to the third value and less than or equal to the fourth value.

[0012] The first value is less than the third value, and the second value is greater than the fourth value.

[0013] According to some embodiments of this application, the pressure generator is provided with a conversion device and a first adjustment device, and the pressure generation module includes a first pressure generation module; when the target test mode is a pneumatic mode, controlling the first detection device to detect the sensor under test includes:

[0014] Obtain the first real-time pressure value generated by the first pressure generation module under the air pressure mode;

[0015] The conversion device and the first adjustment device are controlled to adjust the first detection device, and the first target pressure is obtained through the first standard sensor;

[0016] When the pressure value of the first target pressure is within the first preset pressure range for a first preset time, the conversion device and the first adjustment device are controlled to shut down.

[0017] The first detection device is controlled to detect the sensor under test.

[0018] According to some embodiments of this application, the pressure generator is provided with a second adjustment device, the second adjustment device including a pressurizing device, a shut-off valve, and a fine-tuning device, and the pressure generation module includes a second pressure generation module; when the target test mode is hydraulic mode, controlling the second detection device to detect the sensor under test includes:

[0019] Obtain the second real-time pressure value generated by the second pressure generation module in the hydraulic mode;

[0020] The pressurizing device is controlled to pressurize the second detection device;

[0021] When the real-time pressure value is greater than or equal to the target pressure value, the shut-off valve is controlled to close.

[0022] The fine-tuning device is controlled to adjust the second detection device to obtain the second target pressure;

[0023] When the pressure value of the second target pressure is within the second preset pressure range for a second preset time, the fine-tuning device is controlled to turn off.

[0024] The second detection device is controlled to detect the sensor under test.

[0025] According to some embodiments of this application, the switching device includes a switching valve; controlling the switching device and the regulating device to regulate the first detection device includes:

[0026] The conversion device is controlled to adjust the pressure polarity of the first detection device, wherein the pressure polarity includes negative pressure and positive pressure;

[0027] When the pressure polarity is negative, the switching valve is controlled to be in a recessed state.

[0028] When the pressure polarity is positive, the switching valve is controlled to be in a convex state.

[0029] According to some embodiments of this application, the detection command is obtained through at least one of the following steps:

[0030] Receive the user's voice information and determine the detection command based on the voice information;

[0031] Receive information entered by the user on the control panel or remote terminal, and determine the detection instruction based on the entered information.

[0032] According to some embodiments of this application, the output signal of the sensor under test includes at least one of the following: the current value of the sensor under test, and the switching quantity of the sensor under test.

[0033] Secondly, embodiments of this application provide a controller, including: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the control method for the pressure generator described in the first aspect when running the computer program.

[0034] Thirdly, embodiments of this application provide a pressure generator, including a signal detection module, a pressure output interface, a pressure generation module, a conversion device, a first adjustment device, a second adjustment device, and a controller as described in the second aspect above. The signal detection module includes a first detection device and a second detection device. The first detection device includes a first standard sensor, and the second detection device includes a second standard sensor. The pressure generation module includes a first pressure generation module and a second pressure generation module. The second adjustment device includes a pressurizing device, a shut-off valve, and a fine-tuning device. The conversion device includes a conversion valve.

[0035] According to the technical solution of this application embodiment, at least the following beneficial effects are achieved: First, the pressure generator of this application embodiment includes a signal detection module, a pressure output interface, and a pressure generation module. First, it receives a detection command for detecting the sensor under test; then, it determines a target test mode based on the detection command; based on the target test mode, it controls the signal detection module to connect to the pressure output interface so that the pressure generation module generates a target pressure; when the pressure value of the target pressure is greater than or equal to a preset pressure value, it controls the signal detection module to detect the sensor under test and obtain the output signal of the sensor under test. This application embodiment can flexibly select the target test mode according to different detection commands, achieving diversified and precise detection of sensors. Simultaneously, detection is only performed when the target pressure reaches the preset requirement, effectively improving the accuracy and reliability of the detection results, optimizing the sensor detection process, and improving detection efficiency.

[0036] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0037] The accompanying drawings are used to provide a further understanding of the technical solutions of this application and constitute a part of the specification. They are used together with the embodiments of this application to explain the technical solutions of this application and do not constitute a limitation on the technical solutions of this application.

[0038] Figure 1 This is a schematic diagram of the structure of a pressure generator provided in one embodiment of this application;

[0039] Figure 2 This is a flowchart of a control method for a pressure generator provided in one embodiment of this application;

[0040] Figure 3 This is a flowchart illustrating the detection of the sensor under test according to one embodiment of this application;

[0041] Figure 4 This is a flowchart of a detection process performed by a first detection device according to an embodiment of this application;

[0042] Figure 5 This is a flowchart of a detection process performed by a second detection device according to an embodiment of this application;

[0043] Figure 6 This is a flowchart of adjusting the first detection device according to one embodiment of this application;

[0044] Figure 7 This is a schematic diagram of a controller for performing a control method for a pressure generator according to an embodiment of this application. Detailed Implementation

[0045] The embodiments of this application are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0046] In the description of this application, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0047] In the description of this application, "several" means one or more, "more than" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0048] In the description of this application, unless otherwise expressly defined, terms such as "setup," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this application in conjunction with the specific content of the technical solution.

[0049] In various industries and fields, including military, aviation, aerospace, power, petroleum, chemical, metallurgy, railway, metrology, food, and machinery manufacturing, pressure sensors are widely used in various equipment and systems for the precise measurement of pressure parameters. However, some high-precision pressure sensors cannot meet the requirements for accurately simulating subtle pressure changes, which may lead to deviations in the detection results and affect the accurate evaluation of sensor performance.

[0050] The various embodiments of the pressure generator of this application will be further described below with reference to the accompanying drawings.

[0051] like Figure 1 As shown, Figure 1 This is a schematic diagram of the structure of a pressure generator provided in one embodiment of this application.

[0052] In one embodiment, the pressure generator 1000 includes a signal detection module 1100, which includes a first detection device 1110 and a second detection device 1120. The first detection device 1110 is used for pressure detection in pneumatic mode and includes a first standard sensor 1111. The range of the first standard sensor 1111 covers the test range of pneumatic mode (e.g., -85kPa to 600kPa) with an accuracy of ±0.05% FS. The second detection device 1120 is used for pressure detection in hydraulic mode and includes a second standard sensor 1121. The range of the second standard sensor 1121 covers the test range of hydraulic mode (e.g., 0kPa to 48000kPa) with an accuracy of ±0.05% FS as well.

[0053] In one embodiment, the pressure generator 1000 includes a pressure output interface 1200.

[0054] In one embodiment, the pressure generation module 1300 includes a first pressure generation module 1300 and a second pressure generation module 1300. The first pressure generation module 1300 is used to generate a target pressure in pneumatic mode, and the second pressure generation module 1300 is used to generate a target pressure in hydraulic mode.

[0055] In one embodiment, the pressure generator 1000 further includes a switching device 1400, a first regulating device 1500, and a second regulating device 1600. The switching device 1400 includes a switching valve 1410 for switching pressure polarity (positive / negative pressure). The first regulating device 1500 is used for precise pressure regulation in pneumatic mode, and the second regulating device 1600 is used for pressure regulation in hydraulic mode. The second regulating device 1600 includes a pressurizing device 1610, a shut-off valve 1620, and a fine-tuning device 1630. The pressurizing device 1610 can provide high-pressure output to achieve rapid pressure increase. The shut-off valve 1620 is used to cut off the pressure source after the pressure reaches the target value to maintain stable system pressure. The fine-tuning device 1630 is used to perform fine pressure regulation after the shut-off valve 1620 is closed to ensure that the pressure is stable within the target range.

[0056] Based on the hardware structure of the pressure generator in the above embodiments, the following presents various embodiments of the control method of the pressure generator of this application.

[0057] like Figure 2 As shown, Figure 2 This is a flowchart of a control method for a pressure generator provided in one embodiment of this application; the control method for the pressure generator may include, but is not limited to, steps S210, S220, S230 and S240.

[0058] Step S210: Receive a detection command for detecting the sensor under test;

[0059] Step S220: Determine the target test mode according to the detection instruction;

[0060] Step S230: Connect the target test mode control signal detection module to the pressure output interface so that the pressure generation module generates the target pressure;

[0061] Step S240: When the target pressure value is greater than or equal to the preset pressure value, the control signal detection module detects the sensor under test and obtains the output signal of the sensor under test.

[0062] In one embodiment, after receiving a detection command for testing the sensor under test, the system determines the target test mode based on the detection command. The detection command includes information such as sensor type, detection standard, and performance test requirements. The system matches the corresponding target test mode from a preset library of multiple test modes based on this information. The system sends a control signal to the pressure generation module according to the parameter requirements of the target test mode. The pressure generation module adjusts its own working state according to the control signal to generate a target pressure that meets the requirements. The sensor under test will only be tested if the target pressure value is greater than or equal to a preset pressure value, and finally the output signal of the sensor under test is obtained.

[0063] In one embodiment, the user inputs a testing command through the operating interface of the testing device. The command includes information such as the model of the pressure sensor, the testing standard, and the pressure range to be tested. After receiving the testing command, the command receiving module matches it in a preset test mode library based on the information in the testing command. Since the testing command requires testing a specific pressure range, the mode determination module determines the target test mode as a segmented pressure test mode. This mode will gradually increase the pressure according to a certain pressure gradient. After obtaining the target test mode, the control signal detection module establishes a connection with the pressure output interface according to the requirements of the target test mode and sends a control signal to the pressure generation module. After receiving the control signal, the pressure generation module begins to gradually generate the target pressure according to the parameter requirements of the segmented pressure test mode. When the target pressure value generated by the pressure generation module reaches the preset pressure value, the signal detection module begins to test the pressure sensor under test. The signal detection module collects the output signals of the sensor at different pressure values ​​and transmits these signals to the data processing module for analysis and processing, thereby obtaining the performance evaluation result of the pressure sensor.

[0064] It should be noted that the preset pressure value is set in advance based on factors such as the sensor's rated working pressure and detection standards. Detection will only be performed when the target pressure reaches or exceeds the preset pressure value to ensure the reliability of the detection results.

[0065] It is worth noting that the embodiments of this application can flexibly select the target test mode according to different detection instructions, realize diversified and accurate detection of the sensor, and at the same time, the detection is only performed when the target pressure reaches the preset requirements, which effectively improves the accuracy and reliability of the detection results, optimizes the sensor detection process, and improves the detection efficiency.

[0066] In one embodiment, the target test mode includes one of the following: pneumatic mode and hydraulic mode.

[0067] It should be noted that the pneumatic mode can perform pressure tests on various gases or light fluid media such as air and fuel. The pressure range covers a wide range of pressure testing from -85kPa to 600kPa, which can simulate various working conditions from vacuum environment to medium pressure environment. Moreover, the pressure value can be continuously adjusted within the above range to meet the diverse testing needs of different sensors under test. At the same time, the pressure control accuracy reaches ±0.05% FS (full scale accuracy), ensuring a high-precision pressure testing environment throughout the entire testing range.

[0068] It should be noted that the hydraulic mode is suitable for liquid media such as hydraulic oil and can test sensors related to hydraulic systems. It can output an ultra-wide pressure range of 0 kPa to 42000 kPa, which can meet the testing requirements of high-pressure hydraulic system sensors. The pressure value can be accurately adjusted within the above range through manual adjustment. Users can slowly increase or decrease the pressure according to the testing requirements. The pressure control accuracy also reaches ±0.05% FS, ensuring the testing accuracy under high-pressure environment.

[0069] In one embodiment, when the mode determination module determines the target test mode to be pneumatic mode based on the detection command, the connection control module's control signal detection module establishes a connection with the pneumatic output interface, and sends a control signal to the pneumatic pressure generation module according to the specific pressure requirements in the detection command. The pneumatic pressure generation module, based on the control signal, generates a pneumatic pressure environment of the target pressure value by adjusting the operating state of the air compressor or vacuum pump. When the target test mode is manual hydraulic mode, the connection control module's control signal detection module connects to the hydraulic output interface and provides manual operation instructions to the user. The user gradually increases or decreases the pressure of the hydraulic system by adjusting the handle or knob of the hydraulic pump.

[0070] like Figure 3 As shown, Figure 3This is a flowchart of the detection of the sensor under test provided in one embodiment of this application; the detection of the sensor under test by the control signal detection module in step S220 may include, but is not limited to, steps S310 and S320.

[0071] Step S310: When the target test mode is barometric mode, control the first detection device to detect the sensor to be tested, wherein the range of the first standard sensor is greater than or equal to the first value and less than or equal to the second value.

[0072] Step S320: When the target test mode is hydraulic mode, control the second detection device to detect the sensor under test, wherein the range of the second standard sensor is greater than or equal to the third value and less than or equal to the fourth value; wherein the first value is less than the third value and the second value is greater than the fourth value.

[0073] In one embodiment, when the mode determination module determines the target test mode as the air pressure mode according to the detection command, the system first automatically switches to the first detection device and performs initial calibration on the first detection device. During the calibration process, the system checks the working status of the first standard sensor to ensure that it is within the normal working range. Then, the connection control module controls the first detection device to establish a connection with the sensor under test, and sends a control signal to the air pressure generation module according to the specific pressure requirements in the detection command. The air pressure generation module generates the target pressure and transmits it to the sensor under test and the first standard sensor through the pressure pipeline. After the pressure stabilizes, the signal detection module simultaneously collects the output signals of the sensor under test and the first standard sensor. Since the measurement range of the first standard sensor (greater than or equal to the first value and less than or equal to the second value) matches the test range of the air pressure mode, it can accurately measure the current air pressure value.

[0074] In one embodiment, when the target test mode is hydraulic mode, the system automatically switches to the second detection device, initializes and calibrates the second detection device, checks the working status of the second standard sensor to ensure that it can work normally under high pressure, connects the control module to control the second detection device to establish a connection with the sensor under test, adjusts the hydraulic pump to generate the target pressure in the hydraulic system, and the target pressure acts on both the sensor under test and the second standard sensor. Since the pressure value of hydraulic mode is usually high, the range of the second standard sensor (greater than or equal to the third value and less than or equal to the fourth value) is specifically optimized for high pressure environment. For example, the third value is 0 kPa and the fourth value is 42000 kPa, which can cover the entire test range of hydraulic mode.

[0075] like Figure 4 As shown, Figure 4This is a flowchart of a detection process performed by a first detection device according to an embodiment of this application; the above step S310, which controls the first detection device to detect the sensor under test, may include, but is not limited to, steps S410, S420, S430, and S440.

[0076] Step S410: Obtain the first real-time pressure value generated by the first pressure generation module under the air pressure mode;

[0077] Step S420: The control conversion device and the first adjustment device adjust the first detection device to obtain the first target pressure through the first standard sensor;

[0078] Step S430: When the pressure value of the first target pressure is within the first preset pressure range within a first preset time, the control conversion device and the first adjustment device are turned off.

[0079] Step S440: Control the first detection device to detect the sensor under test.

[0080] In one embodiment, after the system starts, the pressure generation module begins to work, generating air pressure within the target pressure range through an air compressor or vacuum pump. The system acquires the first real-time pressure value generated by the first pressure generation module in real time and feeds it back to the control system. The acquisition frequency of the first real-time pressure value can be set according to system requirements. The control system compares the first real-time pressure value with the target pressure value and calculates the pressure deviation value. Based on the pressure deviation value, the control system controls the conversion device to switch to the corresponding adjustment mode. The control system can precisely adjust the working state of the first adjustment device through a PID (Proportional-Integral-Derivative) control algorithm. During the adjustment process, the first standard sensor measures the current pressure value in real time and inputs it as a feedback signal to the control system. Based on the feedback from the first standard sensor, the control system continuously adjusts the output of the first adjustment device, forming a closed-loop control loop to ensure that the pressure value approaches the first target pressure. When the pressure stability condition is met, the control system issues a command to shut down the conversion device and the first adjustment device to maintain the current pressure state. If the pressure value exceeds the preset range within a preset time, the system will restart the adjustment process. Once the pressure stabilizes, the control system triggers the first detection device to detect the sensor under test. During the detection process, the system simultaneously collects the output signals of the sensor under test and the first standard sensor. Then, the system processes the collected signals, calculates various performance indicators of the sensor under test, and records the detection data after the detection is completed.

[0081] It should be noted that the pressure stabilization condition is that the pressure value of the first target pressure is within the first preset pressure range within the first preset time period. Only when the pressure value of the first target pressure remains within the first preset pressure range during this time period is the pressure considered to have reached a stable state.

[0082] In one embodiment, the target pressure value is 200 kPa, the first preset pressure range is 199.8 kPa to 200.2 kPa (±0.1%), and the first preset time is 30 seconds. The system first adjusts the air pressure to a level close to 200 kPa, and then continuously fine-tunes it through closed-loop control to stabilize the pressure value within the range of 199.8 kPa to 200.2 kPa. When the pressure value remains within this range for 30 seconds, the system determines that the pressure is stable and begins to detect the sensor under test. Through precise pressure control and stability judgment mechanisms, the accuracy and reliability of sensor detection can be effectively improved.

[0083] like Figure 5 As shown, Figure 5 This is a flowchart of a second detection device provided in one embodiment of this application; the above step S320 of controlling the second detection device to detect the sensor under test may include, but is not limited to, steps S510, S520, S530, S540, S550 and S560.

[0084] Step S510: Obtain the second real-time pressure value generated by the second pressure generation module in hydraulic mode;

[0085] Step S520: Control the pressurizing device to pressurize the second detection device;

[0086] Step S530: When the real-time pressure value is greater than or equal to the target pressure value, control the shut-off valve to close;

[0087] Step S540: Control the fine-tuning device to adjust the second detection device to obtain the second target pressure;

[0088] Step S550: When the pressure value of the second target pressure is within the second preset pressure range within the second preset time, the fine-tuning device is turned off.

[0089] Step S560: Control the second detection device to detect the sensor under test.

[0090] In one embodiment, after the system starts, the second pressure generating module begins operation, supplying hydraulic oil to the hydraulic system. A pressure sensor installed in the hydraulic pipeline collects the second real-time pressure value output by the second pressure generating module in real time and transmits the data to the control system at a preset sampling frequency. The control system then drives the pressurization device to rapidly increase the hydraulic system pressure based on the difference between the target pressure value and the real-time pressure value.

[0091] It should be noted that the pressurization device can operate in a stepped or ramp-type pressurization mode. For lower pressure requirements (such as 0-5000kPa), ramp-type pressurization is used, gradually increasing the pressure at a rate of 100Pa / s - 500kPa / s. For higher pressure requirements (such as above 5000kPa), segmented stepped pressurization is used, pausing for 0.5-2 seconds after each pressure step (such as 5000kPa, 10000kPa) to prevent pressure overshoot. During the pressurization process, the real-time pressure value is continuously fed back to the control system, forming a dynamic adjustment of open-loop control.

[0092] In one embodiment, when the second real-time pressure value reaches or exceeds the target pressure value, the control system immediately sends a command to control the shut-off valve installed in the hydraulic main circuit to close quickly, cutting off the main pressurization oil circuit. The shut-off valve closing response time is less than 100ms, effectively preventing pressure overshoot. At the same time, the system automatically switches to the fine-tuning control mode to prepare for pressure fine-tuning. The fine-tuning device is connected to the hydraulic system and the pressure is finely adjusted through PID or fuzzy control algorithms.

[0093] In one embodiment, the control system drives a servo motor to rotate at a low speed of 0.01-0.1 rpm based on the deviation between the real-time pressure and the target pressure, precisely adjusting the opening of the pressure regulating mechanism so that the pressure approaches the second target pressure value at a rate of 110 kPa / s-10 kPa / s. During this process, a second standard sensor (with a range covering 0-50000 kPa and an accuracy of ±0.05% FS) continuously monitors the pressure changes, providing high-precision feedback for fine-tuning control.

[0094] It should be noted that the second preset pressure range can be set to ±0.2% of the target pressure value, and the second preset time can be set to 45 seconds. When the second target pressure value remains within the preset range within this time window, the control system determines that the pressure is stable and sends a command to shut down the fine-tuning device. When pressure fluctuations exceed the range, the system automatically restarts the fine-tuning control program until the stability condition is met.

[0095] In one embodiment, after the pressure stabilizes, the control system triggers the second detection device to start the detection program, filters and amplifies the output signals of the second standard sensor and the sensor under test, and synchronously acquires data through a high-speed ADC at a sampling rate of 10-100kHz. The data processing module uses algorithms such as least squares method and Fourier transform to calculate the performance indicators of the sensor under test, such as nonlinear error, hysteresis error, and repeatability error. After the detection is completed, a detection report is obtained.

[0096] like Figure 6 As shown, Figure 6This is a flowchart of adjusting the first detection device according to an embodiment of this application; the adjustment of the first detection device by the control conversion device and the first adjustment device in step S420 may include, but is not limited to, steps S610, S620 and S630.

[0097] Step S610: The control conversion device adjusts the pressure polarity of the first detection device, wherein the pressure polarity includes negative pressure and positive pressure;

[0098] Step S620: When the pressure polarity is negative, the control switching valve is in a recessed state;

[0099] Step S630: When the pressure polarity is positive, the control switching valve is in the convex state.

[0100] In one embodiment, the system determines the required pressure polarity type (negative or positive) based on the parameters in the detection command. The control system sends a control signal to the conversion device to initiate the pressure polarity adjustment process. When the pressure polarity is set to negative, the control system controls the conversion valve to switch to the concave state. In the concave state, the conversion valve connects the sensor under test to the vacuum source, creating a negative pressure environment. The conversion valve connects the vacuum pump output of the pressure generation module to the detection pipeline by changing the connection method of the internal flow channel, while simultaneously disconnecting from the positive pressure source. The system monitors the negative pressure value in real time through a pressure sensor and adjusts the working state of the vacuum pump through closed-loop control to ensure that the negative pressure value is stable within the target range. When the pressure polarity is set to positive, the control system controls the conversion valve to switch to the convex state. In the convex state, the conversion valve connects the sensor under test to the positive pressure source, creating a positive pressure environment. The conversion valve connects the air compressor output of the pressure generation module to the detection pipeline, while simultaneously disconnecting from the vacuum source. The system also monitors the positive pressure value in real time through a pressure sensor and adjusts the output pressure of the air compressor to ensure that the positive pressure value is stable within the target range.

[0101] It should be noted that when switching pressure polarity, the system first releases the current pressure environment to atmospheric pressure to ensure a safe switch. Then, it switches the state of the switching valve according to the above steps and re-establishes the target pressure environment. During the switching process, the system will perform multiple pressure calibrations and verifications to ensure the accuracy and reliability of the pressure polarity switching.

[0102] It is worth noting that the system can quickly and accurately switch the pressure polarity according to the type of sensor under test and the testing requirements. For differential pressure sensors that need to be tested in both positive and negative pressure environments, the system can first test its positive pressure performance in positive pressure mode, and then switch to negative pressure mode to test its negative pressure performance, which effectively improves the detection efficiency and comprehensiveness.

[0103] In one embodiment, the detection command is obtained through at least one of the following steps:

[0104] Receive user voice information and determine detection instructions based on the voice information;

[0105] It receives information entered by the user on the control panel or remote terminal and determines the detection instructions based on the entered information.

[0106] In one embodiment, regarding voice command acquisition and processing, the system is equipped with a high-sensitivity microphone array, capable of accurately capturing user voice information in noisy environments. The microphone supports omnidirectional sound pickup and noise reduction processing, effectively suppressing environmental noise interference. The received voice signal is first enhanced by a preamplifier, and then converted into a digital signal by an analog-to-digital converter. The digital voice signal is transmitted to the voice recognition engine for processing. This embodiment employs a deep learning-based voice recognition algorithm, supporting the recognition of multiple dialects and accents. After the voice recognition engine converts the voice signal into text information, the system parses the text using Natural Language Processing (NLP) technology. The NLP module contains a pre-trained domain model, capable of accurately identifying user intent, extracting key parameters (such as test mode, pressure value, sensor type, etc.), and converting them into executable detection commands. The converted detection commands undergo grammatical and logical verification to ensure their validity. After successful verification, the system provides confirmation information to the user in voice or text form, such as "Confirm execution of barometric pressure test, target pressure 200 kPa".

[0107] In one embodiment, the system acquires and processes commands from the control panel or remote terminal. Users can input detection parameters via the touchscreen or physical buttons on the local control panel, or remotely via a network connection using a remote terminal (such as a computer, tablet, or mobile phone). Both the control panel and the remote terminal provide intuitive graphical interfaces, supporting functions such as parameter setting and historical record query. After receiving the information entered by the user, the system performs format verification and parameter parsing. For example, after the user selects "barometric pressure mode," enters "target pressure 200 kPa," and selects "sensor model XXX" on the interface, the system combines this information and converts it into an internal detection command format. For information entered via the remote terminal, the system performs identity verification and permission checks to ensure that only authorized users can send valid commands. Simultaneously, the system verifies the range of the entered parameters to prevent system malfunctions due to incorrect input.

[0108] In one embodiment, the present application also includes multimodal command fusion technology, which simultaneously receives information from voice and control panel input and performs cross-validation. While the user issues detection commands via voice, the user also confirms parameters on the control panel. The system integrates the two types of input information to improve the accuracy and reliability of the commands.

[0109] In one embodiment, the output signal of the sensor under test includes at least one of the following: the current value of the sensor under test, and the switching quantity of the sensor under test.

[0110] In one embodiment, for a current output sensor, the system is equipped with a high-precision current acquisition circuit. The circuit uses a low-noise operational amplifier and a precision resistor network to convert the current signal output by the sensor into a voltage signal with a conversion accuracy of ±0.01%. The converted voltage signal is then processed by filtering, amplification, and other conditioning processes to remove noise interference and adjust the signal amplitude to the input range of the ADC (analog-to-digital converter). The conditioned analog signal is then converted into a digital signal by the high-precision ADC. The system restores the current value to the digital signal according to a preset conversion formula and performs linear correction and temperature compensation.

[0111] In one embodiment, for a switch output sensor, the system provides a dedicated switch signal acquisition interface. This interface supports multiple voltage levels (such as TTL, CMOS, relay contacts, etc.) and features opto-isolation protection to prevent external interference from affecting system stability. The system monitors the state changes of the switch signal in real time, recording parameters such as the time point, frequency, and duration of the switch action. For pulse-type switch signals, the system can also measure parameters such as frequency and duty cycle. The data processing module determines whether the state of the switch signal meets expectations based on preset thresholds and logic rules. For example, for a pressure switch sensor, the system detects whether the switch operates at a set pressure value and records parameters such as the operating pressure and return pressure to evaluate the reliability and accuracy of the switch.

[0112] In one embodiment, for a composite sensor that simultaneously outputs current signals and switching signals, the system can simultaneously acquire and process the two signals. Through multi-channel acquisition technology, the system can acquire multiple output parameters of the sensor during the same test process, thereby achieving comprehensive performance evaluation.

[0113] Based on the control methods of the pressure generators described in the above embodiments, the following presents various embodiments of the controller, computer-readable storage medium, and computer program product of this application.

[0114] like Figure 7 As shown, Figure 7 This is a schematic diagram of a controller for executing a control method for a pressure generator according to an embodiment of this application. The controller 700 implemented in this application includes: a processor 710, a memory 720, and a computer program stored in the memory 720 and executable on the processor 710, wherein... Figure 7 The example uses a processor 710 and a memory 720.

[0115] The processor 710 and memory 720 can be connected via a bus or other means. Figure 7 Taking the example of a connection between China and Israel via a bus.

[0116] Memory 720, as a non-transitory computer-readable storage medium, can be used to store non-transitory software programs and non-transitory computer-executable programs. Furthermore, memory 720 may include high-speed random access memory, and may also include non-transitory memory, such as at least one disk storage device, flash memory device, or other non-transitory solid-state storage device. In some embodiments, memory 720 may optionally include remotely located memories 720 relative to processor 710, which can be connected to controller 700 via a network. Examples of such networks include, but are not limited to, the Internet, intranets, local area networks, mobile communication networks, and combinations thereof.

[0117] Those skilled in the art will understand that Figure 7 The device structure shown does not constitute a limitation on the controller 700 and may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0118] exist Figure 7 In the controller 700 shown, the processor 710 can be used to call the fast communication program stored in the memory 720, thereby implementing the pressure generator control method described above. Specifically, the non-transient software program and instructions required to implement the pressure generator control method of the above embodiment are stored in the memory 720, and when executed by the processor 710, the pressure generator control method of the above embodiment is executed.

[0119] It is worth noting that since the controller 700 of this application embodiment can execute the control method of the pressure generator of any of the above embodiments, the specific implementation and technical effects of the controller 700 of this application embodiment can be referred to the specific implementation and technical effects of the control method of the pressure generator of any of the above embodiments.

[0120] Furthermore, one embodiment of this application provides a computer-readable storage medium storing computer-executable instructions for performing the aforementioned control method for a pressure generator. Exemplarily, the above-described method is executed... Figures 2 to 6 The methods and steps in the text.

[0121] It is worth noting that, since the computer-readable storage medium of this application embodiment is capable of executing the control method of the pressure generator of any of the above embodiments, the specific implementation and technical effects of the computer-readable storage medium of this application embodiment can be referred to the specific implementation and technical effects of the control method of the pressure generator of any of the above embodiments.

[0122] Furthermore, one embodiment of this application also provides a computer program product, including a computer program or computer instructions, which are stored in a computer-readable storage medium. A processor of a computer device reads the computer program or computer instructions from the computer-readable storage medium and executes the computer program or computer instructions, causing the computer device to perform the aforementioned pressure generator control method. Exemplarily, the above-described method is performed... Figures 2 to 6 The methods and steps in the text.

[0123] It is worth noting that, since the computer program product of this application embodiment can execute the control method of the pressure generator of any of the above embodiments, the specific implementation method and technical effect of the computer program product of this application embodiment can refer to the specific implementation method and technical effect of the control method of the pressure generator of any of the above embodiments.

[0124] It will be understood by those skilled in the art that all or some of the steps and systems in the methods disclosed above can be implemented as software, firmware, hardware, and suitable combinations thereof. Some or all of the physical components can be implemented as software executed by a processor, such as a central processing unit, digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as an application-specific integrated circuit. Such software can be distributed on a computer-readable medium, which can include computer storage media (or non-transitory media) and communication media (or transient media). As is known to those skilled in the art, the term computer storage media includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information (such as computer-readable instructions, data structures, program modules, or other data). Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technologies, CD-ROM, digital versatile disc (DVD) or other optical disc storage, magnetic cartridges, magnetic tape, disk storage or other magnetic storage devices, or any other medium that can be used to store desired information and is accessible to a computer. Furthermore, as is known to those skilled in the art, communication media typically include computer-readable instructions, data structures, program modules, or other data in modulated data signals such as carrier waves or other transmission mechanisms, and may include any information delivery medium.

[0125] The above is a detailed description of the preferred embodiments of this application. However, this application is not limited to the above embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of this application. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. A control method for a pressure generator, characterized in that, The pressure generator includes a signal detection module, a pressure output interface, and a pressure generation module; the signal detection module includes a first detection device and a second detection device, wherein the first detection device includes a first standard sensor, and the second detection device includes a second standard sensor; the pressure generator is further provided with a conversion device, a first adjustment device, and a second adjustment device; the pressure generation module includes a first pressure generation module; the second adjustment device includes a pressurizing device, a shut-off valve, and a fine-tuning device; the pressure generation module includes a second pressure generation module; the method includes: Receive detection commands for detecting the sensor under test; The target test mode is determined according to the detection command, wherein the target test mode includes one of the following: pneumatic mode and hydraulic mode; Based on the target test mode, the signal detection module is connected to the pressure output interface so that the pressure generation module generates the target pressure. When the target pressure value is greater than or equal to the preset pressure value, the signal detection module is controlled to detect the sensor under test and obtain the output signal of the sensor under test. The control of the signal detection module to detect the sensor under test includes: Obtain the first real-time pressure value generated by the first pressure generation module under the air pressure mode; The conversion device and the first adjustment device are controlled to adjust the first detection device, and the first target pressure is obtained through the first standard sensor; When the pressure value of the first target pressure is within the first preset pressure range for a first preset time, the conversion device and the first adjustment device are controlled to shut down. The first detection device is controlled to detect the sensor under test; the range of the first standard sensor is greater than or equal to -85 kPa and less than or equal to 600 kPa. Obtain the second real-time pressure value generated by the second pressure generation module in the hydraulic mode; The pressurizing device is controlled to pressurize the second detection device; When the real-time pressure value is greater than or equal to the target pressure value, the shut-off valve is controlled to close. The fine-tuning device is controlled to adjust the second detection device to obtain the second target pressure; When the pressure value of the second target pressure is within the second preset pressure range for a second preset time, the fine-tuning device is controlled to turn off. The second detection device is controlled to detect the sensor under test; the range of the second standard sensor is greater than or equal to 0 kPa and less than or equal to 42000 kPa.

2. The method according to claim 1, characterized in that, The switching device includes a switching valve; controlling the switching device and the adjusting device to adjust the first detection device includes: The conversion device is controlled to adjust the pressure polarity of the first detection device, wherein the pressure polarity includes negative pressure and positive pressure; When the pressure polarity is negative, the switching valve is controlled to be in a recessed state. When the pressure polarity is positive, the switching valve is controlled to be in a convex state.

3. The method according to claim 1, characterized in that, The detection command is obtained through at least one of the following steps: Receive the user's voice information and determine the detection command based on the voice information; Receive information entered by the user on the control panel or remote terminal, and determine the detection instruction based on the entered information.

4. The method according to claim 1, characterized in that, The output signal of the sensor under test includes at least one of the following: the current value of the sensor under test, and the switching quantity of the sensor under test.

5. A controller, characterized in that, include: The device includes a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor, when executing the computer program, performs a control method for a pressure generator as described in any one of claims 1 to 4.

6. A pressure generator, characterized in that, The device includes a signal detection module, a pressure output interface, a pressure generation module, a conversion device, a first adjustment device, a second adjustment device, and a controller as described in claim 5. The signal detection module includes a first detection device and a second detection device; the first detection device includes a first standard sensor; the second detection device includes a second standard sensor; the pressure generation module includes a first pressure generation module and a second pressure generation module; the second adjustment device includes a pressurizing device, a shut-off valve, and a fine-tuning device; and the conversion device includes a conversion valve.

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