Proportional valve amplifier-based process diagnosis signal acquisition method
By improving the circuit of the Vickers EEA-PAM-535-D-32 proportional valve amplifier, the process data signal is directly drawn to the signal output port, solving the problems of inconvenient wiring and incomplete data, and achieving more convenient and complete process data acquisition.
Patent Information
- Application Number
- CN202510080537.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-20
- Publication Date
- 2025-02-28
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
When obtaining process control data, the existing Vickers EEA-PAM-535-D-32 proportional valve amplifier is inconvenient to wiring and lacks some process data, which affects the effectiveness of diagnostic monitoring.
The circuit of the comparative valve amplifier is improved, and the process data signals that need to be collected are directly output to the signal output port, so as to facilitate the acquisition of complete process data from the card interface.
It realizes the convenience and integrity of wiring, can obtain all necessary process data, and reduces the need to modify wiring during maintenance, just replace the modified proportional valve amplifier.
Smart Images
Figure CN119543852A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the field of testing technology, and in particular to a method for acquiring process diagnosis signals based on a proportional valve amplifier. Background Art
[0002] Vickers EEA-PAM-535-D-32 proportional valve amplifier is used to drive Vickers KF*G4V-5 series dual-control coil proportional valve, which is used to control the main steam regulating valve of steam turbine. Therefore, the reliability requirements of proportional valve amplifier and proportional valve are relatively high. With the development of equipment monitoring technology, it is possible to monitor proportional valve amplifier and proportional valve. This requires taking out some process control data from Vickers proportional valve amplifier for diagnosis and monitoring. These process control data include regulating valve oil motor position signal (MP4), command signal (MP3), pilot valve feedback, main valve feedback (MP2), solenoid 1 coil current, solenoid 2 coil current, PID controller output (MP5), PID controller integral output (MP6), and command signal after superimposing dead zone (MP1).
[0003] Although the Vickers EEA-PAM-535-D-32 proportional valve amplifier panel has reserved jacks for MP1-MP6 process data measurement, it has the following shortcomings when used for diagnostic monitoring and data acquisition: 1) The reserved jacks are inconvenient to wire, and the jacks are occupied after wiring, making it impossible to use a multimeter for temporary measurement, and also affecting the appearance; 2) Only MP1-MP6 signals are reserved, and three process data, namely, pilot valve feedback, solenoid 1 coil current, and solenoid 2 coil current, are missing. Summary of the invention
[0004] In view of the above problems, the present invention provides a process diagnostic signal acquisition method based on a proportional valve amplifier. By directly modifying the circuit on the proportional valve amplifier, the process data signal to be collected is directly led out to the signal output port, so that complete and comprehensive process data collection can be obtained from the card interface, and the wiring is convenient. Therefore, when the proportional valve is damaged and repaired, there is no need to change the wiring, and only the modified proportional valve amplifier needs to be replaced.
[0005] To achieve the above object, the present invention provides a method for obtaining a process diagnostic signal based on a proportional valve amplifier, comprising: For a proportional valve amplifier connected to the proportional valve, a process diagnosis circuit of the proportional valve amplifier is improved; Setting the preset circuit position of the proportional valve amplifier to a signal detection port, and connecting the signal detection port to a signal output port of the proportional valve amplifier; The process diagnostic data signal of the proportional valve is obtained through the signal output port.
[0006] In the above technical solution, preferably, the specific method for improving the process diagnosis circuit of the circuit of the proportional valve amplifier includes: For the proportional valve amplifier Vickers EEA-PAM-535-D-32, replace the 10KΩ resistors R98, R99 and R101 on the sub-board connected to the X10 chip and the X12 chip with 100Ω resistors; Connect the resistor R98 on the auxiliary board and the connecting end of the X10 chip to the 8th pin of the X3 chip with a flying wire; Remove the capacitor C79 connected to the JN4 chip on the main board, and connect the connecting end of the capacitor C79 and the JN4 chip to the connecting end of the resistor R101 and the X12 chip on the auxiliary board by flying wires; Remove the resistors N5 and N6 on the secondary board connected to the X4 chip; Remove the diode D7 on the mainboard, and connect the cathode end of the diode D7 to the connecting end of the resistor R26 on the mainboard and the operational amplifier U5D by flying wire; Connect the 22nd pin of the JN1 chip on the mainboard to the negative terminal of the diode D24 by means of a flying wire.
[0007] In the above technical solution, preferably, the preset circuit position of the proportional valve amplifier is set as a signal detection port, and the signal detection port is connected to the signal output port of the proportional valve amplifier. The specific process includes: Connect the d24 terminal of the 44th pin of the JN4 chip on the mainboard to the signal output port, and use the output voltage signal as the position signal of the regulating valve oil motor; Connect the b20 terminal of the 26th pin of the JN4 chip on the mainboard to the signal output port, and use the output voltage signal as the command signal; Connect the z20 terminal of the 10th pin of the JN4 chip on the mainboard to the signal output port, and use the output voltage signal as the pilot valve feedback signal; Connect the z18 terminal of the 9th pin of the JN4 chip on the mainboard to the signal output port, and use the output voltage signal as the main valve feedback signal; Connect the d22 terminal of the 43rd pin of the JN4 chip on the mainboard to the signal output port, and calculate the first solenoid valve coil current signal according to the product of the output voltage signal and the coefficient 1; Connect the b12 terminal of the 22nd pin of the JN4 chip on the mainboard to the signal output port, and calculate the second solenoid valve coil current signal according to the product of the output voltage signal and the coefficient 1; Connect the d4 terminal of the 34th pin of the JN4 chip on the mainboard to the signal output port, and use the output voltage signal as the output signal of the PID controller; Connect the d16 terminal of the 40th pin of the JN4 chip on the mainboard to the signal output port, and use the output voltage signal as the integral output signal of the PID controller; The b18 terminal of the 24th pin of the JN4 chip on the mainboard is connected to the signal output port, and the output voltage signal is used as the command signal after the dead zone is superimposed.
[0008] In the above technical solution, preferably, the process diagnostic data signal of the proportional valve is obtained through the signal output port, and the specific process includes: The signal output port is connected to a diagnostic device, and the diagnostic device collects and diagnoses the process signals of each port.
[0009] Compared with the prior art, the beneficial effects of the present invention are as follows: by directly modifying the circuit on the proportional valve amplifier, the process data signal to be collected is directly led out to the signal output port, which facilitates the acquisition of complete and comprehensive process data collection from the card interface and facilitates wiring. Therefore, when the proportional valve is damaged and repaired, there is no need to change the wiring, and only the modified proportional valve amplifier needs to be replaced. BRIEF DESCRIPTION OF THE DRAWINGS
[0010] Figure 1 It is a schematic diagram of the overall flow of a method for obtaining a process diagnostic signal based on a proportional valve amplifier disclosed in an embodiment of the present invention; Figure 2 A schematic diagram of a comparative circuit before and after the resistors R98, R99 and R101 are replaced according to an embodiment of the present invention; Figure 3 A comparison diagram of a resistor R98 disclosed in an embodiment of the present invention before and after the flying wire connection with the 8th pin of the X3 chip; Figure 4 A comparison diagram of a capacitor C79 and a resistor R101 before being connected by flying wires according to an embodiment of the present invention; Figure 5 A comparative schematic diagram of a capacitor C79 and a resistor R101 after being connected by flying wires according to an embodiment of the present invention; Figure 6 A schematic diagram showing the comparison of the resistor N5 and the resistor N6 before and after removal according to an embodiment of the present invention; Figure 7 A comparison diagram of a diode D7 disclosed in an embodiment of the present invention before and after it is removed and connected to a resistor R26 by a flying wire; Figure 8A comparative schematic diagram of the 22nd pin of the JN1 chip disclosed in one embodiment of the present invention before being connected with the cathode end of the diode D24 by a flying wire; Fig. 9 A comparative schematic diagram of a JN1 chip pin 22 disclosed in an embodiment of the present invention and a cathode end of a diode D24 connected by a flying wire; Fig.10 A schematic diagram of setting a signal detection port at a preset circuit position of a proportional valve amplifier disclosed in an embodiment of the present invention. DETAILED DESCRIPTION
[0011] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0012] The present invention is further described in detail below in conjunction with the accompanying drawings: like Figure 1 As shown, a process diagnostic signal acquisition method based on a proportional valve amplifier provided by the present invention includes: For the proportional valve amplifier connected to the proportional valve, the process diagnosis circuit of the proportional valve amplifier is improved; Setting the preset circuit position of the proportional valve amplifier to a signal detection port, and connecting the signal detection port to a signal output port of the proportional valve amplifier; The process diagnostic data signal of the proportional valve is obtained through the signal output port.
[0013] In this embodiment, by directly modifying the circuit on the proportional valve amplifier, the process data signal to be collected is directly led out to the signal output port, which facilitates the acquisition of complete and comprehensive process data collection from the card interface and facilitates wiring. Therefore, when the proportional valve is damaged and repaired, there is no need to change the wiring, and only the modified proportional valve amplifier needs to be replaced.
[0014] Specifically, the circuit of the Vickers EEA-PAM-535-D-32 proportional valve amplifier is partially modified, and the required process control data (control valve oil motor position signal (MP4), command signal (MP3), pilot valve feedback, main valve feedback (MP2), solenoid 1 coil current, solenoid 2 coil current, PID controller output (MP5), PID controller integral output (MP6), command signal after superimposing dead zone (MP1)) is led out to the signal output terminal of the Vickers EEA-PAM-535-D-32 proportional valve amplifier, so as to facilitate the acquisition of process data signals of the proportional valve amplifier and the proportional valve.
[0015] like Figures 2 to 9 As shown, in the above embodiment, preferably, the specific method for improving the process diagnosis circuit of the proportional valve amplifier circuit includes: For the proportional valve amplifier Vickers EEA-PAM-535-D-32, replace the 10KΩ resistors R98, R99 and R101 on the sub-board connected to the X10 chip and the X12 chip with 100Ω resistors; Connect the connecting end of resistor R98 on the auxiliary board and the X10 chip to the 8th pin of the X3 chip with a flying wire; Remove the capacitor C79 connected to the JN4 chip on the main board, and connect the connecting end of the capacitor C79 and the JN4 chip to the connecting end of the resistor R101 and the X12 chip on the auxiliary board with flying wires; Remove the resistors N5 and N6 on the secondary board that are connected to the X4 chip; Remove the diode D7 on the mainboard, and connect the cathode end of the diode D7 to the connecting end of the resistor R26 on the mainboard and the operational amplifier U5D with a flying wire; Connect the 22nd pin of the JN1 chip on the mainboard to the negative terminal of the diode D24 with a flying wire.
[0016] like Fig.10 As shown, in the above embodiment, preferably, the preset circuit position of the proportional valve amplifier is set to the signal detection port, and the signal detection port is connected to the signal output port of the proportional valve amplifier. The specific process includes: Connect the d24 terminal of the 44th pin of the JN4 chip on the mainboard to the signal output port, and use the output voltage signal as the position signal of the regulating valve oil motor; Connect the b20 terminal of the 26th pin of the JN4 chip on the mainboard to the signal output port, and use the output voltage signal as the command signal; Connect the z20 terminal of the 10th pin of the JN4 chip on the mainboard to the signal output port, and use the output voltage signal as the pilot valve feedback signal; Connect the z18 terminal of the 9th pin of the JN4 chip on the mainboard to the signal output port, and use the output voltage signal as the main valve feedback signal; Connect the d22 terminal of the 43rd pin of the JN4 chip on the mainboard to the signal output port, and calculate the first solenoid valve coil current signal according to the product of the output voltage signal and the coefficient 1; Connect the b12 terminal of the 22nd pin of the JN4 chip on the mainboard to the signal output port, and calculate the second solenoid valve coil current signal according to the product of the output voltage signal and the coefficient 1; Connect the d4 terminal of the 34th pin of the JN4 chip on the mainboard to the signal output port, and use the output voltage signal as the output signal of the PID controller; Connect the d16 terminal of the 40th pin of the JN4 chip on the mainboard to the signal output port, and use the output voltage signal as the integral output signal of the PID controller; Connect the b18 terminal of the 24th pin of the JN4 chip on the mainboard to the signal output port, and use the output voltage signal as the command signal after superimposing the dead zone.
[0017] In the above implementation, preferably, the process diagnostic data signal of the proportional valve is obtained through the signal output port, and the specific process includes: The signal output port is connected to the diagnostic device, and the diagnostic device collects and diagnoses the process signals of each port.
[0018] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.
Claims
1. A process diagnostic signal acquisition method based on a proportional valve amplifier, characterized in that: include: For a proportional valve amplifier connected to the proportional valve, a process diagnosis circuit of the proportional valve amplifier is improved; Setting the preset circuit position of the proportional valve amplifier to a signal detection port, and connecting the signal detection port to a signal output port of the proportional valve amplifier; The process diagnostic data signal of the proportional valve is obtained through the signal output port.
2. The process diagnostic signal acquisition method based on proportional valve amplifier according to claim 1 is characterized in that: The specific method for improving the process diagnosis circuit of the proportional valve amplifier circuit includes: For the proportional valve amplifier Vickers EEA-PAM-535-D-32, replace the 10KΩ resistors R98, R99 and R101 on the sub-board connected to the X10 chip and the X12 chip with 100Ω resistors; Connect the resistor R98 on the auxiliary board and the connecting end of the X10 chip to the 8th pin of the X3 chip with a flying wire; Remove the capacitor C79 connected to the JN4 chip on the main board, and connect the connecting end of the capacitor C79 and the JN4 chip to the connecting end of the resistor R101 and the X12 chip on the auxiliary board with a flying wire; Remove the resistors N5 and N6 on the secondary board connected to the X4 chip; Remove the diode D7 on the mainboard, and connect the cathode end of the diode D7 to the connecting end of the resistor R26 on the mainboard and the operational amplifier U5D by flying wire; Connect the 22nd pin of the JN1 chip on the mainboard to the negative terminal of the diode D24 by means of a flying wire.
3. The process diagnostic signal acquisition method based on proportional valve amplifier according to claim 2 is characterized in that: The preset circuit position of the proportional valve amplifier is set as a signal detection port, and the signal detection port is connected to the signal output port of the proportional valve amplifier. The specific process includes: Connect the d24 terminal of the 44th pin of the JN4 chip on the mainboard to the signal output port, and use the output voltage signal as the position signal of the regulating valve oil motor; Connect the b20 terminal of the 26th pin of the JN4 chip on the mainboard to the signal output port, and use the output voltage signal as the command signal; Connect the z20 terminal of the 10th pin of the JN4 chip on the mainboard to the signal output port, and use the output voltage signal as the pilot valve feedback signal; Connect the z18 terminal of the 9th pin of the JN4 chip on the mainboard to the signal output port, and use the output voltage signal as the main valve feedback signal; Connect the d22 terminal of the 43rd pin of the JN4 chip on the mainboard to the signal output port, and calculate the first solenoid valve coil current signal according to the product of the output voltage signal and the coefficient 1; Connect the b12 terminal of the 22nd pin of the JN4 chip on the mainboard to the signal output port, and calculate the second solenoid valve coil current signal according to the product of the output voltage signal and the coefficient 1; Connect the d4 terminal of the 34th pin of the JN4 chip on the mainboard to the signal output port, and use the output voltage signal as the output signal of the PID controller; Connect the d16 terminal of the 40th pin of the JN4 chip on the mainboard to the signal output port, and use the output voltage signal as the integral output signal of the PID controller; The b18 terminal of the 24th pin of the JN4 chip on the mainboard is connected to the signal output port, and the output voltage signal is used as the command signal after the dead zone is superimposed.
4. The process diagnostic signal acquisition method based on proportional valve amplifier according to claim 2 is characterized in that: The process diagnostic data signal of the proportional valve is obtained through the signal output port, and the specific process includes: The signal output port is connected to a diagnostic device, and the diagnostic device collects and diagnoses the process signals of each port.