A pressure measurement assembly simulation device and simulation method

Abstract

The application discloses a pressure measurement assembly simulation device and simulation method, the device comprises a pressure inlet pressure transmitter simulation unit, a pressure outlet pressure transmitter simulation unit, a pressure inlet stop valve simulation unit and a pressure outlet stop valve simulation unit; the circuit part of each pressure inlet pressure transmitter simulation unit and pressure outlet pressure transmitter simulation unit comprises a power conversion circuit, an MCU, an RS485 and a display screen; the MCU receives signals of an upper computer through the RS485, and displays pressure values on the display screen through an SPI interface after analysis; each pressure inlet stop valve simulation unit and pressure outlet stop valve simulation unit comprises a needle-shaped stop valve and a simulation stop valve circuit, the needle-shaped stop valve uses a potentiometer to replace a valve core, the potentiometer is connected with a valve handle, and rotation of the valve handle drives change of the resistance value of the potentiometer. The application has the advantages of simple structure, simple operation and the like.

Description

Technical Field

[0001] This invention relates to the field of pressure transmitter technology, specifically to a pressure measurement component simulation device and simulation method. Background Technology

[0002] With the rapid development of modern industry, the requirements for product quality, performance, and reliability are becoming increasingly stringent. Accurate simulation and analysis of various complex physical phenomena and processes are necessary during product design, research and development, production, and testing. Simulation devices, as an important technological means, can simulate various real-world working conditions in a laboratory environment, providing reliable data support for product research and testing.

[0003] The development of simulation devices involves knowledge and technologies from multiple disciplines, such as physics, mechanics, and electrical engineering. This interdisciplinary integration brings both new opportunities and challenges to the development of simulation devices. By integrating the strengths of different disciplines, more advanced and efficient simulation devices can be developed, providing more effective technical means to solve complex practical problems.

[0004] Simulation devices also have wide applications in training and education. For new employees, direct contact with actual systems can pose certain risks, and the operation and maintenance of real systems require experience and skills. Simulation devices can provide a safe and controlled learning environment, allowing new employees to learn and master relevant knowledge and skills in simulated scenarios. For example, in pressure transmitter training, simulation devices can simulate different fault conditions, enabling new employees to learn how to diagnose and troubleshoot faults, improving their practical operational skills and emergency response capabilities.

[0005] Existing pressure transmitter assemblies sense pressure signals through pressure sensors. Signal processing circuits amplify, filter, and linearize the electrical signals output by the pressure sensors. The housing, connecting parts, and shut-off valves protect the internal components and connect to external equipment. Pressure transmitter assemblies need to circulate pressure media such as air, water, and hydraulic fluid, and operate in environments with high temperatures, high pressures, and hazardous gases, increasing the risks during new employee training. Summary of the Invention

[0006] To address the technical problems existing in the prior art, the present invention provides a pressure measurement component simulation device and simulation method that are simple in structure and easy to operate.

[0007] To solve the above-mentioned technical problems, the technical solution proposed by this invention is as follows:

[0008] A pressure measurement component simulation device includes a pressure transmitter simulation unit for the pressure inlet, a pressure transmitter simulation unit for the pressure outlet, a pressure shut-off valve simulation unit for the pressure inlet, and a pressure shut-off valve simulation unit for the pressure outlet.

[0009] The circuit portion of each pressure transmitter simulation unit at the pressure inlet and pressure transmitter simulation unit at the pressure outlet includes a power conversion circuit, an MCU, an RS485 interface, and a display screen. The MCU receives signals from the host computer via RS485, and after parsing, displays the pressure value on the display screen via the SPI interface. The power conversion circuit provides power to each component.

[0010] Each of the pressure-pressurizing shut-off valve simulation units and the relief shut-off valve simulation units includes a needle-type shut-off valve and a simulated shut-off valve circuit. The needle-type shut-off valve uses a potentiometer instead of a valve core. The potentiometer is connected to the valve handle. The rotation of the valve handle causes a change in the resistance of the potentiometer. The resistance of the potentiometer is related to the number of rotations of the valve and the opening and closing state of the valve. Information demodulation and transmission are performed through the simulated shut-off valve circuit.

[0011] Preferably, the analog shut-off valve circuit includes a power conversion circuit, an MCU, an RS485 interface, and a potentiometer demodulation circuit. The MCU acquires the resistance value of the potentiometer demodulation circuit through an analog-to-digital conversion unit and resolves the resistance value into the number of rotations and the switching state of the valve. After resolution, the MCU sends the valve information to the host computer through the RS485 interface.

[0012] Preferably, the interfaces of the pressure transmitter simulation unit at the pressure inlet, the pressure transmitter simulation unit at the pressure outlet, the pressure shut-off valve simulation unit at the pressure inlet, and the shut-off valve simulation unit at the pressure outlet are power supply and RS485. The power supply voltage is 24VDC. The four power supply interfaces are connected in parallel, and the four RS485 interfaces are daisy-chained to form an RS485 bus interface.

[0013] Preferably, the pressure transmitter simulation unit at the pressure inlet, the pressure transmitter simulation unit at the pressure outlet, the pressure shut-off valve simulation unit at the pressure inlet, and the pressure shut-off valve simulation unit at the pressure outlet are all located on the base plate.

[0014] The present invention also discloses a simulation method based on the pressure measurement component simulation device described above, comprising the following steps:

[0015] The valve rotation simulation unit transmits the valve's rotation count and on / off status information to the host computer in real time via RS485 bus.

[0016] The host computer sends the pressure value to the pressure transmitter simulation unit via RS485 bus based on the number of valve turns and the on / off status of the pressure shut-off valve simulation unit.

[0017] The valve rotation simulation unit transmits the valve's rotation count and on / off status information to the host computer in real time via RS485 bus.

[0018] The host computer sends the pressure value to the pressure transmitter simulation unit at the venting port via RS485 bus, based on the number of valve turns and the on / off status of the venting shut-off valve simulation unit.

[0019] The pressure-inducing shut-off valve simulation unit and the pressure-relieving shut-off valve simulation unit display the pressure value transmitted via RS485 bus in real time on the display screen.

[0020] Preferably, the RS485 bus adopts the Modbus RTU protocol with a baud rate of 38400bps, and the device IDs of the transmitters and shut-off valves can be modified via software.

[0021] Preferably, the working process of the pressure transmitter simulation unit is as follows:

[0022] System initialization: This includes initialization of the system clock, serial port, timers, DMA, SPI, and watchdog timer, etc.

[0023] Serial port reception: Receive data sent by the host computer via the serial port;

[0024] Protocol processing: Parse the pressure display value sent by the host computer according to the MODBUS communication protocol;

[0025] Screen display: Pressure data is displayed on the screen via the SPI interface.

[0026] Preferably, the specific workflow of the pressure-tapping shut-off valve simulation unit and the relief shut-off valve simulation unit is as follows:

[0027] System initialization: This includes initialization of the system clock, serial port, timers, DMA, ADC, and watchdog timer, etc.

[0028] Serial port reception: Receive data sent by the host computer via the serial port;

[0029] Data acquisition: The potentiometer signal is acquired using the microcontroller's built-in ADC as an analog-to-digital converter;

[0030] Serial port output: According to the MODBUS communication protocol, the number of valve rotations and valve on / off status information are sent to the host computer.

[0031] Compared with the prior art, the advantages of the present invention are as follows:

[0032] This invention modifies the mechanical structure and electronic circuitry of the pressure transmitter and shut-off valve in a pressure transmitter assembly to create a pressure transmitter assembly simulation device for new employee training, without actual media flow. Functionally, the simulation device allows for system testing and debugging before physical installation, enabling early detection of potential system problems and avoiding safety risks caused by malfunctions during actual operation, thus saving time and costs. Technically, the simulation device's stability ensures consistent test results over long-term use, providing reliable assurance for product quality control. Operationally and safely, the simple operation and absence of media flow reduce training costs, improve work efficiency, and enhance operational safety. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the structure of an existing pressure measurement component in an embodiment.

[0034] Figure 2 This is a circuit topology diagram of the pressure transmitter simulation unit in this invention.

[0035] Figure 3 This is a flowchart illustrating the operation of the pressure transmitter simulation unit in this invention.

[0036] Figure 4 This is a circuit topology diagram of the simulated shut-off valve in this invention.

[0037] Figure 5 This is a flowchart illustrating the operation of the simulated shut-off valve in this invention.

[0038] Figure 6 This is a flowchart illustrating the operation of the pressure measurement component simulation device in this invention.

[0039] Legend: 1. Pressure transmitter at the pressure inlet; 2. Pressure transmitter at the pressure outlet; 3. Pressure shut-off valve at the pressure inlet; 4. Pressure shut-off valve at the pressure outlet; 5. Base plate. Detailed Implementation

[0040] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0041] like Figure 1 As shown, the existing pressure measurement assembly consists of two pressure transmitters (pressure transmitter 1 at the pressure inlet and pressure transmitter 2 at the pressure outlet), one pressure shut-off valve 3, one pressure shut-off valve 4, and one base plate 5. In actual system operation, pressure shut-off valve 3 controls the flow of medium into the pressure transmitters, while pressure shut-off valve 4 controls the release of medium. The two pressure transmitters measure the pressure values ​​at the pressure inlet and pressure outlet respectively for local display and data upload.

[0042] The pressure measurement component simulation device of this invention modifies the pressure transmitter, pressure tapping shut-off valve, and relief shut-off valve. The transmitter's external structure remains unchanged, but its internal circuitry is customized to display and upload pressure values. Both the pressure tapping shut-off valve and the relief shut-off valve are needle valves; while maintaining their external structure, the floating valve core is replaced with a circuit module, allowing the valve's on / off status to be fed back via electrical signals when no medium is flowing. In the simulation device, the on / off status of the shut-off valve is correlated with the pressure transmitter's displayed value; this correlation is controlled by a host computer. The shut-off valve and pressure transmitter interact with the host computer via an RS485 bus.

[0043] like Figure 2 As shown, the circuitry of the pressure transmitter simulation unit includes a power conversion circuit, an MCU, an RS485 interface, and a display screen. The pressure transmitter receives signals from the host computer via RS485 and inputs them to the MCU via UART. After parsing, the MCU displays the pressure value on the display screen via the SPI interface. The device address of the pressure transmitter simulation unit can be modified using a debugging device via the RS485 interface or via buttons on the display screen. The power conversion circuit converts 24VDC to 5VDC and 3.3VDC to power the MCU, RS485 interface, and display screen.

[0044] like Figure 3 As shown, the specific workflow of the pressure transmitter simulation unit is as follows:

[0045] a. System initialization: This includes initialization of the system clock, serial port, timers, DMA, SPI, and watchdog timer, etc.

[0046] b. Serial port reception: Receive data sent by the host computer via the serial port;

[0047] c. Protocol processing: Parse the pressure display value sent by the host computer according to the MODBUS communication protocol;

[0048] d. Screen display: Pressure and other data are displayed on the screen via the SPI interface.

[0049] Existing pressure-pressing and relief shut-off valves are needle-type shut-off valves, which control the opening and closing of the valve by rotating the valve handle. Typically, 4-5 rotations are required to achieve a fully open or closed state. The pressure-pressing and relief shut-off valve simulation units of this invention use potentiometers instead of valve cores. The potentiometer is connected to the valve handle, and the rotation of the valve handle causes a change in the potentiometer's resistance. The potentiometer resistance is correlated with the number of valve rotations and the valve's open / closed state, and this information is demodulated and transmitted through the circuitry.

[0050] like Figure 4As shown, the analog shut-off valve circuit includes a power conversion circuit, an MCU, an RS485 interface, and a potentiometer demodulation circuit. The MCU of the analog shut-off valve acquires the resistance value from the potentiometer demodulation circuit through an analog-to-digital converter and interprets this resistance value as the number of valve rotations and the on / off state. After interpretation, the MCU sends the valve information to the host computer via the RS485 interface. The device address of the analog shut-off valve can be modified using a debugging device via the RS485 interface. The power conversion circuit converts 24VDC to 5VDC and 3.3VDC to power the MCU, RS485 interface, and display screen.

[0051] like Figure 5 As shown, the specific working process of the shut-off valve is as follows:

[0052] a. System initialization: This includes initialization of the system clock, serial port, timers, DMA, ADC, and watchdog timer, etc.

[0053] b. Serial port reception: Receive data sent by the host computer via the serial port;

[0054] c. Data acquisition: The potentiometer signal is acquired using the microcontroller's built-in ADC as an analog-to-digital converter;

[0055] d. Serial port output: According to the MODBUS communication protocol, the number of valve rotations and valve on / off status information are sent to the host computer.

[0056] like Figure 6 As shown, the interfaces of the pressure transmitter simulation unit at the pressure input port, the pressure transmitter simulation unit at the pressure output port, the pressure shut-off valve simulation unit at the pressure input port, and the pressure shut-off valve simulation unit are power supply and RS485. The power supply voltage is 24VDC. The four power supply interfaces are connected in parallel, and the four RS485 interfaces are daisy-chained to form an RS485 bus interface. The power supply and RS485 of the pressure transmitter and shut-off valve are integrated into one, becoming the only external electrical interface of the pressure measurement component simulation device.

[0057] The pressure measurement component simulation device operates as follows:

[0058] (1) Rotate the pressure-sensing shut-off valve simulation unit, and the valve's number of turns and switch status information are uploaded to the host computer in real time via RS485 bus;

[0059] (2) The host computer sends the pressure value to the pressure transmitter simulation unit via RS485 bus according to the number of turns and the on / off status of the pressure shut-off valve.

[0060] (3) Rotate the discharge shut-off valve simulation unit, and the valve's number of turns and switch status information are uploaded to the host computer in real time via RS485 bus;

[0061] (4) The host computer sends the pressure value to the pressure transmitter simulation unit of the venting port via RS485 bus according to the number of turns and the switching status of the venting shut-off valve simulation unit.

[0062] (5) The pressure-inducing shut-off valve simulation unit and the pressure-relieving shut-off valve simulation unit display the pressure value transmitted by RS485 bus on the display screen in real time.

[0063] (6) The RS485 bus adopts the Modbus RTU protocol with a baud rate of 38400bps. The device IDs of transmitters and shut-off valves can be modified through software.

[0064] This invention modifies the mechanical structure and electronic circuitry of the pressure transmitter and shut-off valve in a pressure transmitter assembly to create a pressure transmitter assembly simulation device for new employee training, without actual media flow. Functionally, the simulation device allows for system testing and debugging before physical installation, enabling early detection of potential system problems and avoiding safety risks caused by malfunctions during actual operation, thus saving time and costs. Technically, the simulation device's stability ensures consistent test results over long-term use, providing reliable assurance for product quality control. Operationally and safely, the simple operation and absence of media flow reduce training costs, improve work efficiency, and enhance operational safety.

[0065] This invention belongs to the field of simulation devices. By modifying a mechanical shut-off valve into an integrated electromechanical shut-off valve and a customized pressure transmitter, a pressure transmitter component simulation device is realized. This device is used to simulate some dangerous or difficult-to-achieve scenarios, such as high temperature and high pressure environments, so that people can understand and deal with these special situations under safe conditions.

[0066] This invention combines mechanical and electronic engineering technologies, utilizes potentiometer linkage with valve handle to design a simulated shut-off valve, customizes the pressure transmitter circuit, and designs and completes a pressure transmitter component simulation device.

[0067] This invention combines practical engineering applications, applying mechanical and electronic technologies to a pressure transmitter assembly simulation device. Compared to actual pressure transmitter assemblies, the simulation device is less expensive than manufacturing the actual product. It significantly reduces safety risks in high-risk applications, improves testing efficiency and resource utilization, and offers good repeatability. This invention aims to create a pressure transmitter assembly simulation device by modifying a mechanical shut-off valve into a mechatronic shut-off valve and modifying the pressure transmitter. This device is used to train new employees in the industrial sector to simulate the use of pressure transmitter assemblies in pipelines carrying pressure media such as gas, water, and hydraulic fluid.

[0068] The above are merely preferred embodiments of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of the present invention should be considered within the scope of protection of the present invention.

Claims

1. A pressure measurement component simulation device, characterized in that, It includes a pressure transmitter simulation unit for the pressure inlet, a pressure transmitter simulation unit for the pressure outlet, a pressure shut-off valve simulation unit for the pressure inlet, and a pressure shut-off valve simulation unit for the pressure outlet. The circuit portion of each pressure transmitter simulation unit at the pressure inlet and pressure transmitter simulation unit at the pressure outlet includes a power conversion circuit, an MCU, an RS485 interface, and a display screen. The MCU receives signals from the host computer via RS485, and after parsing, displays the pressure value on the display screen via the SPI interface. The power conversion circuit provides power to each component. Each of the pressure-pressurizing shut-off valve simulation units and the relief shut-off valve simulation units includes a needle-type shut-off valve and a simulated shut-off valve circuit. The needle-type shut-off valve uses a potentiometer instead of a valve core. The potentiometer is connected to the valve handle. The rotation of the valve handle causes a change in the resistance of the potentiometer. The resistance of the potentiometer is related to the number of rotations of the valve and the opening and closing state of the valve. Information demodulation and transmission are performed through the simulated shut-off valve circuit.

2. The pressure measurement component simulation device according to claim 1, characterized in that, The simulated shut-off valve circuit includes a power conversion circuit, an MCU, an RS485 interface, and a potentiometer demodulation circuit. The MCU acquires the resistance value of the potentiometer demodulation circuit through the analog-to-digital conversion unit and resolves the resistance value into the number of rotations and the on / off state of the valve. After resolution, the MCU sends the valve information to the host computer through the RS485 interface.

3. The pressure measurement component simulation device according to claim 1, characterized in that, The interfaces of the pressure transmitter simulation unit at the pressure inlet, the pressure transmitter simulation unit at the pressure outlet, the pressure shut-off valve simulation unit at the pressure inlet, and the shut-off valve simulation unit at the pressure outlet are power supply and RS485. The power supply voltage is 24VDC. The four power supply interfaces are connected in parallel, and the four RS485 interfaces are daisy-chained to form an RS485 bus interface.

4. The pressure measurement component simulation device according to claim 1, 2, or 3, characterized in that, The pressure transmitter simulation unit at the pressure inlet, the pressure transmitter simulation unit at the pressure outlet, the pressure shut-off valve simulation unit at the pressure inlet, and the pressure shut-off valve simulation unit at the pressure outlet are all located on the base plate.

5. A simulation method based on the pressure measurement component simulation device according to any one of claims 1-4, characterized in that, Including the following steps: The valve rotation simulation unit transmits the valve's rotation count and on / off status information to the host computer in real time via RS485 bus. The host computer sends the pressure value to the pressure transmitter simulation unit via RS485 bus based on the number of valve turns and the on / off status of the pressure shut-off valve simulation unit. The valve rotation simulation unit transmits the valve's rotation count and on / off status information to the host computer in real time via RS485 bus. The host computer sends the pressure value to the pressure transmitter simulation unit at the venting port via RS485 bus, based on the number of valve turns and the on / off status of the venting shut-off valve simulation unit. The pressure-inducing shut-off valve simulation unit and the pressure-relieving shut-off valve simulation unit display the pressure value transmitted via RS485 bus in real time on the display screen.

6. The simulation method according to claim 5, characterized in that, The RS485 bus uses the Modbus RTU protocol with a baud rate of 38400bps. The device IDs of transmitters and shut-off valves can be modified via software.

7. The simulation method according to claim 5 or 6, characterized in that, The specific workflows of the pressure transmitter simulation unit at the pressure inlet and the pressure transmitter simulation unit at the pressure outlet are as follows: System initialization: includes initialization of system clock, serial port, timers, DMA, SPI, and watchdog timer; Serial port reception: Receive data sent by the host computer via the serial port; Protocol processing: Parse the pressure display value sent by the host computer according to the MODBUS communication protocol; Screen display: Pressure data is displayed on the screen via the SPI interface.

8. The simulation method according to claim 5 or 6, characterized in that, The specific workflows of the pressure-sensing shut-off valve simulation unit and the relief shut-off valve simulation unit are as follows: System initialization: includes initialization of system clock, serial port, timers, DMA, ADC and watchdog timer; Serial port reception: Receive data sent by the host computer via the serial port; Data acquisition: The potentiometer signal is acquired using the microcontroller's built-in ADC as an analog-to-digital converter; Serial port output: According to the MODBUS communication protocol, the number of valve rotations and valve on / off status information are sent to the host computer.

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