An electric actuator potentiometer performance detection device and method

Abstract

The present invention relates to a potentiometer performance detection device and method for an electric actuator, comprising: a control unit for generating a debugging control signal; a debugging unit connected to the control unit for driving the electric actuator to rotate according to the debugging control signal so as to drive a potentiometer arranged on the electric actuator to rotate; a detection unit for detecting a voltage signal generated during the rotation of the potentiometer and processing the voltage signal to output a current signal. This potentiometer performance detection device can accurately control the action of the potentiometer in the electric actuator and detect its performance during the action process according to the output current signal, ensuring the accuracy and reliability of the control of the electric actuator.

Description

Technical Field

[0001] The present invention relates to the technical field of potentiometers, and more particularly, to a performance detection device and method for a potentiometer of an electric actuator. Background Art

[0002] Electric actuators are widely used in important systems of nuclear power plants, mainly for automatically regulating the opening and closing of valve pipelines. Their availability is directly related to nuclear safety and is an important guarantee for nuclear safety. According to the control method, nuclear power electric actuators are mainly divided into two categories: on-off valve electric actuators and regulating valve electric actuators. The former controls the full opening and closing of the valve after receiving an instruction, and the latter can control any opening degree (i.e., any valve position) of the valve under the DCS command. Among them, the core component for displaying or controlling the valve position is the potentiometer. Therefore, it is necessary to perform performance inspection on the potentiometer to ensure the accuracy and reliability of the control of the electric actuator.

[0003] Currently, the existing relevant test tools mainly drive the change of the potentiometer resistance value by a high-precision stepper motor, output pulses by a data acquisition platform to drive the motor to move in a specific step, and collect and process signals. However, the existing test tools cannot truly restore the change of the potentiometer resistance value during the movement of the electric actuator and cannot truly achieve the performance inspection of the potentiometer. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a performance detection device and method for a potentiometer of an electric actuator.

[0005] The technical solution adopted by the present invention to solve its technical problem is to construct a performance detection device for a potentiometer of an electric actuator, including:

[0006] A control unit for generating a debugging control signal;

[0007] A debugging unit connected to the control unit for driving the electric actuator to rotate according to the debugging control signal to drive the potentiometer arranged on the electric actuator to rotate;

[0008] A detection unit for generating a voltage signal during the rotation of the potentiometer and processing the voltage signal to output a current signal.

[0009] In the performance detection device for a potentiometer of an electric actuator according to the present invention, the debugging unit includes: a driving module and a contactor;

[0010] The driving module is connected to the control unit for outputting a driving signal according to the debugging control signal;

[0011] The contactor is connected to the drive module and is used to drive the electric actuator to rotate according to the drive signal.

[0012] In the electric actuator potentiometer performance detection device of the present invention, the contactor is a forward and reverse contactor; the electric actuator rotates back and forth in a forward and reverse manner according to the drive of the forward and reverse contactor, so as to drive the potentiometer to rotate back and forth.

[0013] In the electric actuator potentiometer performance detection device of the present invention, the detection unit includes: a voltage conversion module, a test module, and a display module;

[0014] The input end of the voltage conversion module is connected to the external power input port, the output end of the voltage conversion module is connected to the power supply input end of the test module, and the test module is respectively connected to the potentiometer and the display module;

[0015] The voltage conversion module is used to convert the power supply voltage accessed by the external power input port into a working voltage and send the working voltage to the test module;

[0016] The test module is used to provide a working current to the potentiometer and collect the voltage signal generated by the potentiometer during rotation, and process the voltage signal to output the current signal;

[0017] The display module is used to display the current signal.

[0018] In the electric actuator potentiometer performance detection device of the present invention, the voltage conversion module includes: a transformer;

[0019] The input end of the transformer is connected to the external power input port, and the output end of the transformer is connected to the power supply input end of the test module.

[0020] In the electric actuator potentiometer performance detection device of the present invention, the test module includes: a measurement voltage circuit, a voltage-current conversion circuit, and an output current circuit;

[0021] The voltage-current conversion circuit is connected to the voltage conversion module and the potentiometer, and is used to perform conversion processing on the working voltage output by the voltage conversion module to obtain a power supply voltage and the working current, and send the working current to the potentiometer;

[0022] The measurement voltage circuit is connected to the potentiometer and is used to collect the voltage signal generated by the potentiometer during rotation;

[0023] The output current circuit is connected to the measurement voltage circuit and is configured to process the voltage signal to output the current signal.

[0024] In the potentiometer performance detection device of the electric actuator according to the present invention, it further includes: a switch module disposed between the debugging unit and the external power input port;

[0025] The switch module is used to control the power supply circuit of the debugging unit.

[0026] In the potentiometer performance detection device of the electric actuator according to the present invention, the switch module includes: a circuit breaker;

[0027] The circuit breaker is disposed between the external power input port and the debugging unit.

[0028] In the potentiometer performance detection device of the electric actuator according to the present invention, the control unit includes: a PLC controller;

[0029] The PLC controller is configured to generate the debugging control signal and send the debugging control signal to the debugging unit.

[0030] The present invention also provides a method for detecting the performance of a potentiometer of an electric actuator, including the following steps:

[0031] The control unit outputs a debugging control signal;

[0032] The debugging unit receives the debugging control signal and drives the electric actuator to rotate according to the debugging control signal, so as to drive the potentiometer disposed on the electric actuator to rotate;

[0033] During the rotation of the potentiometer, the detection unit adopts the voltage signal generated during the rotation of the potentiometer and processes the voltage signal to output a current signal.

[0034] Implementing the potentiometer performance detection device and method of the present invention has the following beneficial effects: including: a control unit, the control unit is configured to generate a debugging control signal; a debugging unit, the debugging unit is connected to the control unit and is configured to drive the electric actuator to rotate according to the debugging control signal to drive the potentiometer disposed on the electric actuator to rotate; a detection unit, the detection unit is configured to generate a voltage signal during the rotation of the potentiometer and process the voltage signal to output a current signal. This potentiometer performance detection device can accurately control the action of the potentiometer in the electric actuator and detect its performance during the action according to the output current signal, ensuring the accuracy and reliability of the control of the electric actuator. Description of the Drawings

[0035] The present invention will be further described below in conjunction with the accompanying drawings and embodiments. In the drawings:

[0036] Figure 1 is a schematic block diagram of a potentiometer performance detection device for an electric actuator of the present invention;

[0037] Figure 2 is a schematic circuit diagram of a potentiometer performance detection device for an electric actuator of the present invention;

[0038] Figure 3 is a flowchart of a potentiometer performance detection method for an electric actuator of the present invention. Specific Embodiments

[0039] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0040] Figure 1 An embodiment of a potentiometer performance detection device for an electric actuator provided by the present invention is shown. The potentiometer performance detection device for an electric actuator can drive the electric actuator to drive the potentiometer installed on the electric actuator to rotate, collect signals during the rotation of the potentiometer, and perform data processing based on the collected signals, truly restoring the change in resistance value of the potentiometer during the movement of the electric actuator, and can simulate the entire process of the DCS system from control to collection of valve position signals to the greatest extent.

[0041] Specifically, as Figure 1 shown, the potentiometer performance detection device for an electric actuator includes: a control unit 10, a debugging unit 20 connected to the control unit 10, and a detection unit 30 connected to the debugging unit 20. Among them, the control unit 10 is used to generate a debugging control signal; the debugging unit 20 is used to drive the electric actuator to rotate according to the debugging control signal to drive the potentiometer installed on the electric actuator to rotate; the detection unit 30 is used to generate a voltage signal during the rotation of the potentiometer and process the voltage signal to output a current signal.

[0042] In this embodiment, the control unit 10 inputs the test parameters set by the user into the control unit 10, or pre-stores the test parameters in the control unit 10. When it is necessary to perform the performance detection of the potentiometer of the electric actuator, the control unit 10 generates corresponding debugging control signals according to the test parameters, and sends the debugging control signals to the debugging unit 20 to control the debugging unit 20 to drive the electric actuator to rotate according to the debugging control signals. Thus, the potentiometer arranged thereon is driven to rotate by the rotation of the electric actuator, and during the rotation of the potentiometer, the detection unit 30 performs real-time signal detection, and performs conversion processing on the obtained voltage signal to obtain the real-time resistance value of the potentiometer and convert it into a corresponding current signal, so as to detect the performance of the potentiometer according to the output current signal.

[0043] Optionally, in this embodiment, the control unit 10 includes: a PLC controller; the PLC controller is used to generate debugging control signals and send the debugging control signals to the debugging unit 20. Specifically, corresponding test parameters are set according to the action conditions of the electric actuator on site, and the set test parameters are input into the PLC controller or pre-stored inside the PLC controller, and then the PLC controller generates corresponding debugging control signals according to the test parameters.

[0044] In this embodiment, the debugging unit 20 includes: a driving module and a contactor. Among them, the driving module is connected to the control unit 10 and is used to output driving signals according to the debugging control signals; the contactor is connected to the driving module and is used to drive the electric actuator to rotate according to the driving signals.

[0045] Further, in this embodiment, the contactor is a forward and reverse contactor. The electric actuator rotates back and forth in a forward and reverse manner according to the drive of the forward and reverse contactor to drive the potentiometer to rotate back and forth in a forward and reverse manner.

[0046] Specifically, the driving module is the power circuit of the debugging unit 20. The forward and reverse contactors are driven through this power circuit to control the forward and reverse rotation of the electric actuator, and during the forward and reverse rotation, the potentiometer arranged on the electric actuator rotates following the electric actuator. During the forward and reverse rotation of the electric actuator, the internal forward and reverse limit switches of the electric actuator will be triggered, thereby cutting off the power circuit to achieve the function of controlling the switch.

[0047] In this embodiment, the detection unit 30 includes: a voltage conversion module 31, a test module 32, and a display module 33. The input end of the voltage conversion module 31 is connected to the external power input port, the output end of the voltage conversion module 31 is connected to the power supply input end of the test module 32, and the test module 32 is respectively connected to the potentiometer and the display module 33.

[0048] Specifically, the voltage conversion module 31 is used to convert the power supply voltage input from the external power supply input port into a working voltage and send the working voltage to the test module 32; the test module 32 is used to supply a working current to the potentiometer and collect the voltage signal generated during the rotation of the potentiometer, and process the voltage signal to output a current signal; the display module 33 is used to display the current signal. Optionally, in this embodiment, the display module 33 can be an oscilloscope.

[0049] In this embodiment, the test module 32 includes: a voltage measurement circuit, a voltage-current conversion circuit, and an output current circuit; the voltage-current conversion circuit is connected to the voltage conversion module 31 and the potentiometer, and is used to perform conversion processing on the working voltage output by the voltage conversion module 31 to obtain a power supply voltage and a working current, and send the working current to the potentiometer; the voltage measurement circuit is connected to the potentiometer and is used to collect the voltage signal generated during the rotation of the potentiometer; the output current circuit is connected to the voltage measurement circuit and is used to process the voltage signal to output a current signal.

[0050] Furthermore, in this embodiment, the potentiometer performance detection device of the electric actuator further includes: a switch module 40 disposed between the debugging unit 20 and the external power supply input port; the switch module 40 is used to control the power supply circuit of the debugging unit 20.

[0051] In a specific embodiment, as Figure 2 shown, the control unit 10 is a PLC controller, and the voltage conversion module 31 is a transformer. Among them, the input end of the transformer is connected to the external power supply input port, and the output end of the transformer is connected to the power supply input end of the test module 32. The switch module 40 includes: a circuit breaker; the circuit breaker is disposed between the external power supply input port and the debugging unit 20.

[0052] As Figure 2 shown, the test module 32 is an STT1 card. Among them, pin 1 and pin 4 of the STT1 card are respectively connected to I+ and I- of the potentiometer, and the STT1 card supplies a working current to the potentiometer through pin 1 and pin 4. In this embodiment, the STT1 card can supply a current of up to 500 mA to the potentiometer. Pin 2 and pin 3 of the STT1 card are respectively connected to U+ and U- of the potentiometer, and the voltage signal generated during the rotation of the potentiometer is collected through pin 2 and pin 3. The voltage collected through pin 2 and pin 3 is compared with the working current provided by pin 1 and pin 4 to obtain the corresponding resistance value of the potentiometer, and is converted into a current of 4 - 20 mA (current signal) according to a ratio, and then the current is displayed through the display module 33. Of course, the voltage collected by pin 2 and pin 3 can also be displayed in real time through the display module 33.

[0053] The potentiometer performance detection device for the electric actuator provided by the present invention can accurately control the action of the potentiometer in the nuclear power electric actuator and detect its performance during the action process, truly restore the change of the resistance value of the potentiometer during the movement of the electric actuator, can simulate the whole process from control to acquisition of the valve position signal by the DCS system to the greatest extent, and can test the performance change of the potentiometer circuit through frequent forward and reverse actions.

[0054] Reference Figure 3 , the present invention provides a method for detecting the performance of a potentiometer of an electric actuator. Among them, the method for detecting the performance of the potentiometer of the electric actuator can be implemented based on the potentiometer performance detection device disclosed in the embodiments of the present invention.

[0055] Specifically, as Figure 3 shown, the method for detecting the performance of the potentiometer of the electric actuator includes the following steps:

[0056] Step S301, the control unit 10 outputs a debugging control signal.

[0057] Step S302, the debugging unit 20 receives the debugging control signal and drives the electric actuator to rotate according to the debugging control signal to drive the potentiometer arranged on the electric actuator to rotate.

[0058] Step S303, during the rotation of the potentiometer, the detection unit 30 adopts the voltage signal generated during the rotation of the potentiometer and processes the voltage signal to output a current signal.

[0059] In this specification, each embodiment is described in a progressive manner. The key point of each embodiment is to describe the differences from other embodiments. The same or similar parts among the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the description of the method part.

[0060] Those skilled in the art can further realize that the units and algorithm steps of each example described in combination with the embodiments disclosed in this article can be implemented by electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described according to functions in the above description. Whether these functions are executed in a hardware or software manner depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but this implementation should not be considered to exceed the scope of the present invention.

[0061] The steps of the methods or algorithms described in connection with the embodiments disclosed herein may be implemented directly in hardware, in software modules executed by a processor, or in a combination thereof. The software modules may be placed in a random access memory (RAM), internal memory, read-only memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.

[0062] The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly, and cannot limit the protection scope of the present invention. All equivalent changes and modifications made in accordance with the scope of the claims of the present invention shall fall within the scope covered by the claims of the present invention.

Claims

1. An electric actuator potentiometer performance detection device, characterized in that, it includes: A control unit, which is used to generate a debugging control signal according to test parameters, wherein the test parameters are set according to the action conditions of the on-site electric actuator; A debugging unit, which is connected to the control unit and is used to drive the electric actuator to rotate according to the debugging control signal so as to drive the potentiometer arranged on the electric actuator to rotate; the debugging unit includes: a driving module and a contactor; the driving module is connected to the control unit and is used to output a driving signal according to the debugging control signal; the contactor is connected to the driving module and is used to drive the electric actuator to rotate according to the driving signal; the contactor is a forward and reverse contactor; the electric actuator rotates back and forth in a forward and reverse manner according to the drive of the forward and reverse contactor to drive the potentiometer to rotate back and forth in a forward and reverse manner; the driving module is the power circuit of the debugging unit; A detection unit, which is used to generate a voltage signal during the rotation of the potentiometer and process the voltage signal to output a current signal.

2. The electric actuator potentiometer performance detection device according to claim 1, characterized in that, the detection unit includes: a voltage conversion module, a test module and a display module; The input end of the voltage conversion module is connected to an external power input port, the output end of the voltage conversion module is connected to the power supply input end of the test module, and the test module is respectively connected to the potentiometer and the display module; The voltage conversion module is used to convert the power supply voltage accessed by the external power input port into a working voltage and send the working voltage to the test module; The test module is used to provide a working current to the potentiometer and collect the voltage signal generated by the potentiometer during rotation, and process the voltage signal to output the current signal; The display module is used to display the current signal.

3. The electric actuator potentiometer performance detection device according to claim 2, characterized in that, the voltage conversion module includes: a transformer; The input end of the transformer is connected to the external power input port, and the output end of the transformer is connected to the power supply input end of the test module.

4. The electric actuator potentiometer performance detection device according to claim 2, characterized in that, the test module includes: a voltage measurement circuit, a voltage-current conversion circuit and an output current circuit; The voltage-current conversion circuit is connected to the voltage conversion module and the potentiometer, and is used to perform conversion processing on the working voltage output by the voltage conversion module to obtain a power supply voltage and the working current, and send the working current to the potentiometer; The voltage measurement circuit is connected to the potentiometer and is used to collect the voltage signal generated by the potentiometer during rotation; The output current circuit is connected to the voltage measurement circuit and is used to process the voltage signal to output the current signal.

5. The electric actuator potentiometer performance detection device according to claim 2, It is characterized in that further comprising a switch module disposed between the debugging unit and the external power input port The switch module is used to control the power supply circuit of the debugging unit 6. The potentiometer performance detection device for an electric actuator according to claim 5 It is characterized in that The switch module includes: a circuit breaker The circuit breaker is disposed between the external power input port and the debugging unit 7. The potentiometer performance detection device for an electric actuator according to any one of claims 1-6 It is characterized in that The control unit includes: a PLC controller The PLC controller is used to generate the debugging control signal and send the debugging control signal to the debugging unit 8. A method for detecting the performance of a potentiometer of an electric actuator It is characterized in that comprising the following steps The control unit outputs a debugging control signal; the control unit generates the debugging control signal according to test parameters, wherein the test parameters are set according to the action conditions of the electric actuator on site The debugging unit receives the debugging control signal and drives the electric actuator to rotate according to the debugging control signal, so as to drive the potentiometer disposed on the electric actuator to rotate; the debugging unit includes: a driving module and a contactor; the driving module is connected to the control unit and is used to output a driving signal according to the debugging control signal; the contactor is connected to the driving module and is used to drive the electric actuator to rotate according to the driving signal; the contactor is a forward and reverse contactor; the electric actuator rotates forward and backward according to the drive of the forward and reverse contactor, so as to drive the potentiometer to rotate forward and backward; the driving module is the power circuit of the debugging unit During the rotation of the potentiometer, the detection unit uses the voltage signal generated during the rotation of the potentiometer and processes the voltage signal to output a current signal

Images