Pressure measurement assembly simulation device and simulation method

Abstract

The invention discloses a pressure measurement assembly simulation device and a simulation method. The device comprises a pressure leading port pressure transmitter simulation unit, a discharge port pressure transmitter simulation unit, a pressure leading stop valve simulation unit and a discharge stop valve simulation unit. The circuit part of each pressure leading port pressure transmitter simulation unit and the circuit part of each discharge port pressure transmitter simulation unit comprise a power conversion circuit, an MCU, an RS485 and a display screen. The MCU receives a signal of an upper computer through the RS485, analyzes the signal and displays a pressure value on the display screen through the SPI interface; each pressure drawing stop valve simulation unit and each release stop valve simulation unit respectively comprise a needle-shaped stop valve and a simulation stop valve circuit, the needle-shaped stop valves replace valve cores with potentiometers, the potentiometers are connected with valve handles, and the valve handles rotate to drive the resistance values of the potentiometers to change. The device has the advantages of simple structure, simplicity and convenience in operation and the like.

Description

Technical Field

[0001] The present invention mainly relates to the technical field of pressure transmitters, and in particular to a pressure measurement component simulation device and a simulation method. Background Art

[0002] With the rapid development of modern industry, the requirements for product quality, performance and reliability are getting higher and higher. In the process of product design, development, production and testing, it is necessary to accurately simulate and analyze various complex physical phenomena and processes. As an important technical means, simulation devices can simulate various actual working conditions in laboratory environments and provide reliable data support for product development and testing.

[0003] The development of simulation devices involves knowledge and technology from multiple disciplines, such as physics, mechanics, and electronic engineering. Interdisciplinary integration has brought new opportunities and challenges to the development of simulation devices. By integrating the advantages of different disciplines, more advanced and efficient simulation devices can be developed, providing more effective technical means for solving complex practical problems.

[0004] Simulators are also widely used in the fields of training and teaching. For new employees, direct contact with the actual system may be risky, and the operation and maintenance of the actual system also requires certain experience and skills. Simulators can provide a safe and controllable learning environment, allowing new employees to learn and master relevant knowledge and skills in simulated scenarios. For example, in the training of pressure transmitters, simulators can simulate different fault conditions, allowing new employees to learn how to diagnose and troubleshoot faults, and improve their practical operation and emergency handling capabilities.

[0005] The existing pressure transmitter assembly senses the pressure signal through the pressure sensor, and the signal processing circuit amplifies, filters, linearizes, and processes the electrical signal output by the pressure sensor. The housing, connecting parts, and shut-off valves protect the internal components and connect external devices. The pressure transmitter assembly needs to circulate pressure media such as air, water, and hydraulic pressure, and there are high temperature, high pressure, and hazardous gases in the environment, which increases the risk in the training process of new employees. Summary of the invention

[0006] In view of the technical problems existing in the prior art, the present invention provides a pressure measurement component simulation device and a simulation method with simple structure and easy operation.

[0007] In order to solve the above technical problems, the technical solution proposed by the present invention is:

[0008] A pressure measurement component simulation device, comprising a pressure inlet pressure transmitter simulation unit, a discharge outlet pressure transmitter simulation unit, a pressure inlet stop valve simulation unit and a discharge stop valve simulation unit;

[0009] The circuit part of each of the pressure inlet pressure transmitter simulation unit and the discharge outlet pressure transmitter simulation unit includes a power conversion circuit, an MCU, an RS485 and a display screen; the MCU receives the signal from the host computer through the RS485, and after the MCU analyzes it, displays the pressure value on the display screen through the SPI interface; the power conversion circuit is used to provide power for each component;

[0010] Each of the pressure-inducing stop valve simulation unit and the relief stop valve simulation unit includes a needle stop valve and a simulated stop valve circuit. The needle stop valve uses a potentiometer to replace the valve core. The potentiometer is connected to the valve handle. The rotation of the valve handle drives the change of the potentiometer resistance. The potentiometer resistance is related to the number of valve rotations and the switch state of the valve. Information demodulation and transmission are performed through the simulated stop valve circuit.

[0011] Preferably, the analog stop valve circuit includes a power conversion circuit, an MCU, an RS485 and a potentiometer demodulation circuit; the MCU collects the resistance value of the potentiometer demodulation circuit through an analog-to-digital conversion unit, and parses the resistance value into the number of turns and the switch state of the valve. After analysis, the MCU sends the valve information to the host computer through the RS485 interface.

[0012] Preferably, the interfaces of the pressure inlet pressure transmitter simulation unit, the discharge port pressure transmitter simulation unit, the pressure inlet stop valve simulation unit and the discharge stop valve simulation unit are power supply and RS485, the power supply voltage level is 24VDC, the four power supply interfaces are connected in parallel, and the four RS485 interfaces form an RS485 bus interface in a daisy chain manner.

[0013] Preferably, the pressure inlet pressure transmitter simulation unit, the discharge outlet pressure transmitter simulation unit, the pressure inlet stop valve simulation unit and the discharge stop valve simulation unit are all located on the bottom plate.

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

[0015] The pressure-inducing stop valve simulation unit is rotated, and the valve turns and switch status information are uploaded to the host computer in real time through the RS485 bus;

[0016] The upper computer sends the pressure value to the pressure transmitter simulation unit at the pressure inlet through the RS485 bus according to the valve turns and switch status of the pressure cut-off valve simulation unit;

[0017] Rotate the relief stop valve simulation unit, and the valve turns and switch status information are uploaded to the host computer in real time through the RS485 bus;

[0018] The upper computer sends the pressure value to the discharge port pressure transmitter simulation unit through the RS485 bus according to the valve turns and switch status of the discharge stop valve simulation unit;

[0019] The pressure guide stop valve simulation unit and the relief stop valve simulation unit display the pressure value transmitted by the RS485 bus in real time on the display screen.

[0020] Preferably, the RS485 bus adopts Modbus RTU protocol with a baud rate of 38400bps, and the device IDs of the transmitter and the stop valve can be modified through software.

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

[0022] System initialization: including initialization of system clock, serial port, timer, DMA, SPI and watchdog;

[0023] Serial port receiving: receiving data sent by the host computer through the serial port;

[0024] Protocol processing: According to the MODBUS communication protocol, analyze the pressure display value sent by the host computer;

[0025] Screen display: The pressure data is displayed on the screen through the SPI interface.

[0026] Preferably, the working process of the pressure-inducing stop valve simulation unit and the relief stop valve simulation unit is as follows:

[0027] System initialization: including initialization of system clock, serial port, timer, DMA, ADC and watchdog;

[0028] Serial port receiving: receiving data sent by the host computer through the serial port;

[0029] Data acquisition: The built-in ADC of the microcontroller is used as an analog-to-digital converter to collect the potentiometer signal;

[0030] Serial port output: According to the MODBUS communication protocol, the valve rotation number and valve switch status information are sent to the host computer.

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

[0032] The present invention realizes a pressure transmitter assembly simulation device for training new employees without real medium circulation by modifying the mechanical structure and electronic circuit of the pressure transmitter and stop valve in the pressure transmitter assembly. From the functional aspect, the pressure transmitter assembly simulation device performs system testing and debugging before the actual installation, which can discover possible problems in the system in advance, avoid safety risks caused by failures in actual operation, and save time and cost; from the technical aspect, the stability of the simulation device can ensure the consistency of test results for a long time, and provide reliable guarantee for product quality control; from the operational and safety aspects, the simple operation method and no medium circulation can reduce training costs, improve work efficiency and operational safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a structural schematic diagram 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 the present invention.

[0035] Figure 3 This is a working flow chart of the pressure transmitter simulation unit in the present invention.

[0036] Figure 4 This is a topological diagram of the simulated stop valve circuit in the present invention.

[0037] Figure 5 It is the working flow chart of the simulated stop valve in the present invention.

[0038] Figure 6 This is a working flow chart of the pressure measurement component simulation device in the present invention.

[0039] Legend: 1. Pressure transmitter at the pressure inlet; 2. Pressure transmitter at the discharge outlet; 3. Pressure cut-off valve; 4. Discharge cut-off valve; 5. Bottom plate. DETAILED DESCRIPTION

[0040] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0041] like Figure 1 As shown, the existing pressure measurement assembly is integrated with two pressure transmitters (pressure transmitter 1 for the pressure inlet and pressure transmitter 2 for the discharge port), one pressure cut-off valve 3, one discharge cut-off valve 4 and one base plate 5. In actual system operation, the pressure cut-off valve 3 controls the medium to flow into the pressure transmitter, the discharge cut-off valve 4 controls the medium to be discharged, and the two pressure transmitters respectively measure the pressure values ​​of the pressure inlet and the discharge port for local display and data upload.

[0042] The pressure measurement component simulation device of the present invention transforms the pressure transmitter, the pressure-inducing stop valve, and the discharge stop valve. The outer structure of the transmitter remains unchanged, and the internal circuit is customized to display and upload the pressure value; the pressure-inducing stop valve and the discharge stop valve are both needle-type stop valves, and the floating valve core is replaced with a circuit module while keeping the outer structure unchanged, and the switch state of the valve is fed back through an electrical signal without the flow of the medium; in the simulation device, the switch state of the stop valve is associated with the display value of the pressure transmitter, and the associated state is controlled by the host computer, and the stop valve and the pressure transmitter exchange information with the host computer through the RS485 bus.

[0043] like Figure 2 As shown in the figure, the circuit part of the pressure transmitter simulation unit includes power conversion circuit, MCU, RS485 and display screen; the pressure transmitter receives the signal of the host computer through RS485, inputs it into MCU through UART, and after MCU analyzes it, it displays the pressure value on the display screen through the SPI interface. The device address of the pressure transmitter simulation unit can be modified by the debugging device through the RS485 interface, or by the buttons on the display screen. The power conversion circuit converts 24VDC into 5VDC and 3.3VDC to power the MCU, RS485 and display screen.

[0044] like Figure 3 As shown in the figure, the working process of the pressure transmitter simulation unit is as follows:

[0045] a. System initialization: including initialization of system clock, serial port, timer, DMA, SPI and watchdog;

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

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

[0048] d. Screen display: Through the SPI interface, the pressure and other data are displayed on the screen.

[0049] The existing pressure-inducing stop valve and the relief stop valve are needle-shaped stop valves, which are controlled by rotating the valve handle, and usually rotate 4 to 5 times to reach a fully open or closed state. The pressure-inducing stop valve simulation unit and the relief stop valve simulation unit of the present invention use a potentiometer to replace the valve core, and the potentiometer is connected to the valve handle. The rotation of the valve handle drives the change of the potentiometer resistance value. The potentiometer resistance value is related to the number of valve rotations and the valve switch state, and information demodulation and transmission are performed through the circuit part.

[0050] like Figure 4As shown in the figure, the analog stop valve circuit includes a power conversion circuit, MCU, RS485 and a potentiometer demodulation circuit. The MCU of the analog stop valve collects the resistance value of the potentiometer demodulation circuit through the analog-to-digital conversion unit, and resolves the resistance value into the number of valve rotations and the switch state. After the MCU resolves the information, it sends the valve information to the host computer through the RS485 interface. The device address of the analog stop valve can be modified through the RS485 interface using a debugging device. The power conversion circuit converts 24VDC into 5VDC and 3.3VDC to power the MCU, RS485 and display.

[0051] like Figure 5 As shown in the figure, the stop valve working process is as follows:

[0052] a. System initialization: including initialization of system clock, serial port, timer, DMA, ADC and watchdog;

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

[0054] c. Data acquisition: Use the built-in ADC of the microcontroller as an analog-to-digital converter to collect the potentiometer signal;

[0055] d. Serial port output: According to the MODBUS communication protocol, the valve rotation number and valve switch status information are sent to the host computer.

[0056] like Figure 6 As shown, the interfaces of the pressure transmitter simulation unit for the inlet, the pressure transmitter simulation unit for the discharge port, the pressure cut-off valve simulation unit and the discharge cut-off valve simulation unit are power supply and RS485, the power supply voltage level is 24VDC, the four power supply interfaces are connected in parallel, and the four RS485 interfaces form an RS485 bus interface in a daisy chain manner. The power supply and RS485 of the pressure transmitter and the cut-off valve are integrated together to become the only external electrical interface of the pressure measurement component simulation device.

[0057] The pressure measurement assembly simulator works as follows:

[0058] (1) The pressure-inducing stop valve simulation unit is rotated, and the valve rotation number and switch status information are uploaded to the host computer in real time through the RS485 bus;

[0059] (2) The host computer sends the pressure value to the pressure transmitter simulation unit at the pressure inlet through the RS485 bus according to the number of turns and switch status of the pressure cut-off valve;

[0060] (3) The valve simulation unit is rotated to upload the valve number of turns and switch status information to the host computer in real time via the RS485 bus;

[0061] (4) The host computer sends the pressure value to the discharge port pressure transmitter simulation unit through the RS485 bus according to the number of turns and switch status of the discharge stop valve simulation unit;

[0062] (5) The pressure-inducing stop valve simulation unit and the relief stop valve simulation unit display the pressure value transmitted by the RS485 bus in real time on the display screen;

[0063] (6) The RS485 bus uses the Modbus RTU protocol with a baud rate of 38400bps. The device ID of the transmitter and stop valve can be modified through software.

[0064] The present invention realizes a pressure transmitter assembly simulation device for training new employees without real medium circulation by modifying the mechanical structure and electronic circuit of the pressure transmitter and stop valve in the pressure transmitter assembly. From the functional aspect, the pressure transmitter assembly simulation device performs system testing and debugging before the actual installation, which can discover possible problems in the system in advance, avoid safety risks caused by failures in actual operation, and save time and cost; from the technical aspect, the stability of the simulation device can ensure the consistency of test results for a long time, and provide reliable guarantee for product quality control; from the operational and safety aspects, the simple operation method and no medium circulation can reduce training costs, improve work efficiency and operational safety.

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

[0066] The present invention combines mechanical and electronic engineering technologies, utilizes a potentiometer to link a valve handle, designs a simulated stop valve, customizes a pressure transmitter circuit, and designs and completes a pressure transmitter component simulation device.

[0067] The present invention applies mechanical and electronic technologies to a pressure transmitter assembly simulation device in combination with actual engineering applications. Compared to the pressure transmitter assembly, the pressure transmitter assembly simulation device has a lower cost than the actual product manufacturing cost, which can greatly reduce safety risks for high-risk application scenarios, improve test efficiency and resource utilization, and have good repeatability. The present invention aims to realize a pressure transmitter assembly simulation device by transforming a mechanical stop valve into a mechanical electronic stop valve and transforming a pressure transmitter, which is used to train new employees in the industrial field to simulate the use of pressure transmitter assemblies on pipelines that circulate pressure media such as air, water, and hydraulics.

[0068] The above are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should be regarded as the protection scope 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 discharge port, a pressure stop valve simulation unit and a discharge stop valve simulation unit; The circuit part of each of the pressure inlet pressure transmitter simulation unit and the discharge outlet pressure transmitter simulation unit includes a power conversion circuit, an MCU, an RS485 and a display screen; the MCU receives the signal from the host computer through the RS485, and after the MCU analyzes it, displays the pressure value on the display screen through the SPI interface; the power conversion circuit is used to provide power for each component; Each of the pressure-inducing stop valve simulation unit and the relief stop valve simulation unit includes a needle stop valve and a simulated stop valve circuit. The needle stop valve uses a potentiometer to replace the valve core. The potentiometer is connected to the valve handle. The rotation of the valve handle drives the change of the potentiometer resistance. The potentiometer resistance is related to the number of valve rotations and the switch state of the valve. Information demodulation and transmission are performed through the simulated stop valve circuit.

2. The pressure measurement component simulation device according to claim 1, characterized in that: The analog stop valve circuit includes a power conversion circuit, an MCU, an RS485 and a potentiometer demodulation circuit; the MCU collects the resistance value of the potentiometer demodulation circuit through an analog-to-digital conversion unit, and parses the resistance value into the number of turns and the switch state of the valve. After the MCU parses the resistance value, it 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 for the inlet pressure, the pressure transmitter simulation unit for the discharge port, the pressure stop valve simulation unit and the discharge stop valve simulation unit are power supply and RS485, the power supply voltage level is 24VDC, the four power supply interfaces are connected in parallel, and the four RS485 interfaces form an RS485 bus interface in a daisy chain manner.

4. The pressure measurement component simulation device according to claim 1, 2 or 3, characterized in that: The pressure inlet pressure transmitter simulation unit, the discharge outlet pressure transmitter simulation unit, the pressure inlet stop valve simulation unit and the discharge stop valve simulation unit are all located on the bottom plate.

5. A simulation method based on the pressure measurement component simulation device according to any one of claims 1 to 4, characterized in that: Includes steps: The pressure-inducing stop valve simulation unit is rotated, and the valve turns and switch status information are uploaded to the host computer in real time through the RS485 bus; The upper computer sends the pressure value to the pressure transmitter simulation unit at the pressure inlet through the RS485 bus according to the valve turns and switch status of the pressure cut-off valve simulation unit; Rotate the relief stop valve simulation unit, and the valve turns and switch status information are uploaded to the host computer in real time through the RS485 bus; The upper computer sends the pressure value to the discharge port pressure transmitter simulation unit through the RS485 bus according to the valve turns and switch status of the discharge stop valve simulation unit; The pressure guide stop valve simulation unit and the relief stop valve simulation unit display the pressure value transmitted by the RS485 bus in real time on the display screen.

6. The simulation method according to claim 5, characterized in that: The RS485 bus adopts Modbus RTU protocol with a baud rate of 38400bps. The device IDs of the transmitter and the stop valve can be modified through software.

7. The simulation method according to claim 5 or 6, characterized in that: The working process of the pressure transmitter simulation unit is as follows: System initialization: including initialization of system clock, serial port, timer, DMA, SPI and watchdog; Serial port receiving: receiving data sent by the host computer through the serial port; Protocol processing: According to the MODBUS communication protocol, analyze the pressure display value sent by the host computer; Screen display: The pressure data is displayed on the screen through the SPI interface.

8. The simulation method according to claim 5 or 6, characterized in that: The working process of the pressure cut-off valve simulation unit and the relief cut-off valve simulation unit is as follows: System initialization: including initialization of system clock, serial port, timer, DMA, ADC and watchdog; Serial port receiving: receiving data sent by the host computer through the serial port; Data acquisition: The built-in ADC of the microcontroller is used as an analog-to-digital converter to collect the potentiometer signal; Serial port output: According to the MODBUS communication protocol, the valve rotation number and valve switch status information are sent to the host computer.

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