Valve test circuit

Abstract

The utility model provides a valve test circuit. The valve test circuit comprises a main control board and a valve driving module, wherein the valve driving module comprises a plurality of acquisition conditioning modules and a plurality of driving relay groups; the plurality of acquisition and conditioning modules are connected in parallel, a first end of each acquisition and conditioning module is correspondingly connected with one driving relay group, and a second end of each acquisition and conditioning module is electrically connected with the main control board; the driving relay group comprises a first relay and a second relay, and a first end of the acquisition conditioning module is electrically connected with the first relay and the second relay respectively; wherein the first relay and the second relay are used for switching the driving mode of the valve driving module; and the acquisition conditioning module is used for acquiring a working state signal of a valve to be tested in each driving mode, and transmitting the working state signal to the main control board for testing.

Description

TECHNICAL FIELD

[0001] The utility model relates to valve test field, concretely relates to a valve test circuit. BACKGROUND

[0002] The valve test circuit is used for electric valve electric performance test to ensure that the valve is safe and reliable.

[0003] In the related art, the valve test circuit adopts common positive electrode or common negative electrode driving mode, the driving mode is single, the flexibility is poor, and multiple driving modes cannot be compatible. Therefore, providing a valve test circuit capable of compatible multiple driving modes has become an urgent problem for those skilled in the art to solve. SUMMARY

[0004] In view of the technical problem that the sealed optical fiber connector cannot identify the existence of optical signal passing, the utility model adopts the technical scheme that:

[0005] The valve driving module includes a plurality of acquisition and conditioning modules and a plurality of driving relay groups. The plurality of acquisition and conditioning modules are connected in parallel, and the first end of each acquisition and conditioning module is connected to a driving relay group. The second end of each acquisition and conditioning module is electrically connected to the main control board. The driving relay group includes a first relay and a second relay. The first end of the acquisition and conditioning module is electrically connected to the first relay and the second relay.

[0006] The first relay and the second relay are used to switch the driving mode of the valve driving module. The acquisition and conditioning module is used to collect the working state signal of the valve to be tested in each driving mode and transmit the working state signal to the main control board for testing.

[0007] Specifically, the valve test circuit further includes a first transistor and a second transistor. The collector of the first transistor is connected to the first end of the first relay. The emitter of the first transistor and the second end of the first relay are respectively connected to the first end of the voltage acquisition module in the acquisition and conditioning module. The third end of the first relay is connected to the driving power supply.

[0008] The emitter of the second transistor is connected to the first end of the second relay. The collector of the first transistor and the second end of the second relay are respectively connected to the second end of the current acquisition module in the acquisition and conditioning module. The third end of the second relay is connected to the driving power supply.

[0009] Specifically, the valve driving module further includes a release resistance switching module. The release resistance switching module is electrically connected to the first end and the second end of the input end of the acquisition and conditioning module.

[0010] Further, the release resistance switching module comprises a first branch, a second branch, a third branch and a fourth branch; wherein the first branch, the second branch, the third branch and the fourth branch are electrically connected with two input ends of the acquisition and conditioning module respectively;

[0011] The first branch comprises a first switch, a first diode and a second diode connected in series;

[0012] The second branch comprises a second switch, a third diode and a first resistance connected in series;

[0013] The third branch comprises a third switch, a fourth diode and a second resistance connected in series;

[0014] The fourth branch comprises a fourth switch, a fifth diode and a third resistance connected in series.

[0015] Specifically, further comprising a matrix switching circuit; wherein the matrix switching circuit is electrically connected with an output end of the acquisition and conditioning module.

[0016] Further, the matrix switching module comprises a plurality of double-pole single-throw relays; wherein the plurality of double-pole single-throw relays are connected in parallel, and each double-pole single-throw relay is connected with a valve to be tested.

[0017] Specifically, the main control board comprises an FPGA controller, an isolation circuit and a digital circuit;

[0018] Wherein, the output end of the FPGA controller is electrically connected with the input end of the isolation circuit, for generating a digital control signal of the valve driving module, and transmitting the digital control signal to the isolation circuit;

[0019] The output end of the isolation circuit is electrically connected with the input end of the digital circuit, for isolating the digital control signal, and transmitting the isolated digital control signal to the digital circuit.

[0020] Further, the valve driving module further comprises a control signal circuit;

[0021] Wherein, the output end of the control signal circuit is electrically connected with the driving relay group, and the input end of the control signal circuit is electrically connected with the digital circuit, for receiving the isolated digital control signal transmitted by the digital circuit, and transmitting the isolated digital control signal to the driving relay group.

[0022] Specifically, the valve driving module further comprises an acquisition output circuit;

[0023] The input end of the acquisition output circuit is connected with the output end of the acquisition and conditioning module; and the working state signal is received.

[0024] Specifically, the acquisition and conditioning module comprises a voltage measuring device, a current measuring device and a resistance measuring device; the first measuring end of the voltage measuring device is electrically connected with the first measuring end of the resistance measuring device through a first bidirectional switch; the second measuring end of the voltage measuring device is electrically connected with the first measuring end of the current measuring device; and the second measuring end of the current measuring device is electrically connected with the second measuring end of the resistance measuring device through a second bidirectional switch.

[0025] The utility model has at least the following technical effects: every drive relay group in the valve drive module is equipped with first relay and second relay, and they are single knife double fixed switch. Single knife double fixed switch has one moving end (namely "knife") connected with power supply incoming line, and two immobile ends connected with electric equipment. For first relay and second relay, when the moving end of first relay is connected with different immobile end (namely the collector of above-mentioned first tetrode, or acquisition and conditioning module), and the moving end of second relay is also connected with different immobile end (namely the emitter of above-mentioned second tetrode, or acquisition and conditioning module), a plurality of connection combinations are generated. For example, the moving end of first relay is connected with immobile end A, and the moving end of second relay is connected with immobile end C, corresponding to one drive mode. If the moving end of first relay is switched to immobile end B, and the moving end of second relay is still in immobile end C, another drive mode is formed. In this way, through the different position combinations of two single knife double fixed relays, a plurality of connection modes can be realized, laying a solid hardware foundation for compatible multiple drive modes.

[0026] The valve test circuit can be compatible with multiple drive modes, can meet the test requirements of different types of electric valves, greatly improves the universality and adaptability of the test circuit, and enables the test circuit to cope with more complex and diverse valve test scenarios. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or related technologies, the drawings needed to be used in the embodiment or related technology description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without creating any creative labor.

[0028] Figure 1 The utility model provides a kind of valve test circuit's structural schematic diagram;

[0029] Figure 2The utility model provides a kind of valve test circuit's release resistance switching module's principle schematic diagram is provided.

[0030] Figure 3 The utility model provides a kind of valve test circuit's matrix switching module's principle schematic diagram. DETAILED DESCRIPTION

[0031] To make the technical problems, technical solutions and advantages to be solved by the utility model more clear, the technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model.

[0032] In the description of the utility model, it should be explained that the orientation or position relationship indicated by the terms "upper", "lower", "inner", "outer" and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, so it cannot be understood as a limitation on the utility model. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0033] In addition, in the description of the utility model, unless otherwise explicitly limited, the terms "mounting", "connection", "connection", "connection" should be broadly understood. For example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or indirectly connected through an intermediate medium; it can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood in combination with specific circumstances.

[0034] As Figure 1 The utility model discloses an embodiment provides a kind of valve test circuit, comprising: main control board 100 and valve drive module 200;

[0035] Among them, the valve drive module 200 includes: a plurality of acquisition conditioning module 250 and a plurality of drive relay group 220.

[0036] The plurality of acquisition conditioning modules are connected in parallel, and the first end of each acquisition conditioning module is connected to one drive relay group, and the second end of each acquisition conditioning module is electrically connected to the main control board.

[0037] Specifically, the first end and the second end of the acquisition conditioning module are both input ends. With reference to Figure 1As shown, the first end of the output end of the acquisition and conditioning module is electrically connected with the isolation switch of the positive electrode channel (i.e., channel 1+); and the second end of the output end of the acquisition and conditioning module is electrically connected with the isolation switch of the negative electrode channel (i.e., channel 1-).

[0038] The driving relay group includes a first relay k1 and a second relay k2, and the first end of the acquisition and conditioning module is electrically connected with the first relay and the second relay, respectively.

[0039] Specifically, the first branch of the first end of the acquisition and conditioning module is electrically connected with the first relay, and the second branch of the first end of the acquisition and conditioning module is electrically connected with the second relay.

[0040] The first relay and the second relay are used to switch the driving mode of the valve driving module; the acquisition and conditioning module is used to acquire the working state signal of the valve under test in each driving mode and transmit the working state signal to the main control board for testing.

[0041] Specifically, the valve test circuit further includes a display 130, a controller 140, a power module 110 and a device power supply 120.

[0042] Further, the main control board is electrically connected with the device power supply 120 for powering the main control board; the device power supply is electrically connected with the power module 110 for powering the device power supply, the controller and the display. The output end of the controller is electrically connected with the serial port and the network port of the main control board for sending control instructions to the main control board. The output end of the display is electrically connected with the input end of the controller for displaying the working state signal of the valve under test.

[0043] Further, the first relay and the second relay can modify the driving mode of the valve driving module based on the working mode of the valve under test. For example, when the working mode of the valve under test is the common positive electrode mode, the first relay and the second relay modify the driving mode of the valve driving module to the common positive electrode mode.

[0044] Further, after acquiring the working state signal, the acquisition and conditioning module can transmit the working state signal to the main control board through the second end of the input end.

[0045] Specifically, the valve test circuit further includes a first triode Q1-N and a second triode Q1-P; the collector of the first triode is connected with the first end of the first relay, the emitter of the first triode and the second end of the first relay are respectively connected with the first end of the voltage acquisition module in the acquisition and conditioning module, and the third end of the first relay is connected with the driving power supply.

[0046] The emitter of the second transistor is connected with the first end of the second relay, the collector of the first transistor and the second end of the second relay are respectively connected with the second end of the voltage acquisition module in the acquisition and conditioning module, and the third end of the second relay is connected with the driving power supply 210.

[0047] Further, the emitter of the first transistor and the second end of the first relay are both connected with a diode.

[0048] Further, the base of the first transistor is electrically connected with the output end of the control signal circuit 230, and the base of the second transistor is electrically connected with the output end of the control signal circuit 230.

[0049] Specifically, the valve driving module further comprises a release resistance switching module 240, and the release resistance switching module is electrically connected with the first end and the second end of the input end of the acquisition and conditioning module.

[0050] Further, the release resistance switching module comprises a first branch, a second branch, a third branch and a fourth branch, wherein the first branch, the second branch, the third branch and the fourth branch are respectively electrically connected with the two input ends of the acquisition and conditioning module.

[0051] The first branch comprises a first switch KS1, a first diode and a second diode RS1 connected in series.

[0052] The second branch comprises a second switch KS2, a third diode and a first resistance RS2 connected in series.

[0053] The third branch comprises a third switch KS3, a fourth diode and a second resistance RS3 connected in series.

[0054] The fourth branch comprises a fourth switch KS4, a fifth diode and a third resistance RS4 connected in series.

[0055] Specifically, in order to meet the requirements of different models of driving circuits for release resistance, the release resistance in the driving circuit can be adjusted to four levels through the four branches of the release resistance switching module.

[0056] For example, referring to Figure 2 Fig. 1 is a schematic diagram of the principle of the release resistance switching module provided for the embodiment of the utility model, wherein the resistance value of the first branch is 0Ω; the resistance value of the first resistance is 10Ω, that is, the resistance value of the second branch is 10Ω; the resistance value of the second resistance is 20Ω, that is, the resistance value of the third branch is 20Ω; the resistance value of the third resistance is 50Ω, that is, the resistance value of the fourth branch is 50Ω.

[0057] Here, gear shifting can be realized by controlling 4 relays KS1, KS2, KS3 and KS4. For example, when KS1 is controlled to be closed and KS2, KS3 and KS4 are controlled to be opened, the release resistance is switched to 0Ω gear at this time; when KS2 is controlled to be closed and KS1, KS3 and KS4 are controlled to be opened, the release resistance is switched to 10Ω gear at this time.

[0058] Specifically, the valve test circuit further comprises a matrix switching circuit 150, wherein the matrix switching circuit is electrically connected with the output end of the acquisition and conditioning module.

[0059] Further, the matrix switching module comprises a plurality of double-break single-position relays, wherein the plurality of double-break single-position relays are connected in parallel, and each double-break single-position relay is connected with a valve to be tested.

[0060] Further, referring to Figure 3 Fig. 1, which is a principle schematic diagram of the matrix switching module provided for the embodiment of the utility model, wherein the output end of the digital circuit 160 of the main control board is electrically connected with the input end of the matrix switching module, and the control signal circuit 230 in the valve driving module 200 is electrically connected with the input end of the matrix switching module.

[0061] Here, the control signal circuit is connected with valve 1 driving +, valve 1 driving -, valve 2 driving + and valve 2 driving -, for controlling the matrix switching module to complete the switching of the driving positive end and the driving negative end (i.e. the switching of the driving mode) by using double-break single-position relays, and the matrix switching module comprises 32 test channel switching paths in total, wherein valves 1 to 16 share test channel 1, and valves 17 to 32 share test channel 2.

[0062] When the number of valves to be tested is less than or equal to 2, the valves can be directly tested through the test interface of the front panel, and the two test interfaces of the front panel are independent of each other and can meet the requirement that two valves to be tested are driven at the same time. When a plurality of valves to be tested need to be tested, all the valves to be tested can be connected to the patrol test interface, and automatic patrol test of all the valves to be tested can be realized by controlling the relays in the matrix switching module through the main control board.

[0063] Specifically, the main control board comprises an FPGA controller 170, an isolation circuit 180 and a digital circuit 160.

[0064] The output end of the FPGA controller is electrically connected with the input end of the isolation circuit, for generating the digital control signal of the valve driving module and transmitting the digital control signal to the isolation circuit.

[0065] The output end of the isolation circuit is electrically connected with the input end of the digital circuit, for isolating the digital control signal and transmitting the isolated digital control signal to the digital circuit.

[0066] Further, the digital control signal is generated by the FPGA controller, and then the control of the valve driving module, i.e. the control of the driving relay group, is completed based on the isolated digital control signal processed by the isolation circuit.

[0067] Here, the digital circuit also sends a matrix switching control signal to the matrix switching module to control the matrix switching module, complete the relay switching of the matrix switching module to realize the automatic inspection test of all valves.

[0068] Specifically, the valve driving module further comprises a control signal circuit.

[0069] The output end of the control signal circuit is electrically connected with the driving relay group, and the input end of the control signal circuit is electrically connected with the digital circuit, for receiving the isolated digital control signal transmitted by the digital circuit and transmitting the isolated digital control signal to the driving relay group.

[0070] Further, the control signal circuit can control the first relay and the collector of the first triode, or be connected with the first end of the voltage acquisition module in the acquisition and conditioning module; can control the second relay and the emitter of the second triode, or be connected with the first end of the current acquisition module in the acquisition and conditioning module.

[0071] Specifically, the valve driving module further comprises an acquisition output circuit 260.

[0072] The input end of the acquisition output circuit is connected with the output end of the acquisition and conditioning module; for receiving the working state signal.

[0073] Further, the acquisition and conditioning module comprises a voltage measuring device, a current measuring device and a resistance measuring device; wherein the first measuring end of the voltage measuring device is electrically connected with the first measuring end of the resistance measuring device through a first bidirectional switch, the second measuring end of the voltage measuring device is electrically connected with the first measuring end of the current measuring device, and the second measuring end of the current measuring device is electrically connected with the second measuring end of the resistance measuring device through a second bidirectional switch.

[0074] Further, the current measuring device is used for measuring the valve current in the valve switching process, is realized by using a Hall device, is used for converting the current signal into a voltage signal, the input valve dynamic current is converted into a -5V-5V voltage through the Hall sensor, the input end of the Hall sensor is completely isolated from the rear-end circuit, and the output signal is input to the AD acquisition module 190 of the main control board for high-speed acquisition.

[0075] Further, the resistance acquisition device adopts a 24-bit high-precision AD conversion chip to acquire the resistance signal, adopts a four-wire resistance wiring mode, and adopts a constant current source measurement circuit, the resistance measurement precision of the resistance measurement device is preferably within ±0.1Ω, the resistance measurement range is 0-200Ω, the measurement frequency can reach 100Hz, and the resistance measurement resistance also outputs the measured resistance signal to the AD acquisition module of the main control board for high-speed acquisition.

[0076] The working principle of the valve test circuit provided by the embodiment of the utility model is as follows: each drive relay group in the valve drive module is equipped with a first relay and a second relay, and they are both single-blade double-position switches. The single-blade double-position switch has one moving end (i.e. "blade") connected with the power supply incoming line, and two stationary ends connected with the electric equipment. For the first relay and the second relay, when the moving end of the first relay is connected with different stationary ends (i.e. the collector of the above-mentioned first third tube, or the acquisition and conditioning module), and the moving end of the second relay is also correspondingly connected with different stationary ends (i.e. the emitter of the above-mentioned second third tube, or the acquisition and conditioning module), a plurality of connection combinations will be generated. For example, the moving end of the first relay is connected with stationary end A, and the moving end of the second relay is connected with stationary end C, corresponding to one driving mode; if the moving end of the first relay is switched to stationary end B, and the moving end of the second relay is still in stationary end C, another driving mode is formed. In this way, through different position combinations of the two single-blade double-position relays, a plurality of connection modes can be realized, which lays a solid hardware foundation for the compatibility of a plurality of driving modes.

[0077] The valve test circuit can be compatible with a plurality of driving modes by virtue of the design, can meet the test requirements of different types of electric valves, greatly improves the universality and adaptability of the test circuit, and enables the test circuit to cope with more complex and diverse valve test scenes.

[0078] And, the plurality of acquisition conditioning modules are connected in parallel, and each acquisition conditioning module corresponds to a driving relay group. Since the first relay and the second relay are single-pole double-throw switches, when testing different types of valves, the positions of the two single-pole double-throw relays in the driving relay group corresponding to each acquisition conditioning module can be flexibly adjusted according to the characteristics of the valve. For example, for a complex valve that requires simultaneous acquisition of multiple signals, the positions of the relays in the relay groups corresponding to the plurality of acquisition conditioning modules can be adjusted to allow different acquisition conditioning modules to acquire different position or type of working state signals of the valve, and the plurality of driving relay groups can switch between different positions to achieve different driving modes, thereby meeting the testing requirements. Each acquisition conditioning module and its corresponding driving relay group can work independently without interfering with each other.

[0079] The flexibility of the valve test circuit is improved, which can flexibly cope with diversified test scenarios, effectively improves the test efficiency and test effect, reduces the test cost, and enhances the practicality and convenience of the test circuit in actual application.

[0080] Although some specific embodiments of the utility model have been described in detail through examples, those skilled in the art should understand that the above examples are only for illustration, and are not intended to limit the scope of the utility model. Those skilled in the art should also understand that various modifications can be made to the embodiments without departing from the scope and spirit of the utility model. The scope disclosed by the utility model is defined by the appended claims.

Claims

1. A valve test circuit, characterized by, The valve test circuit comprises a main control board and a valve driving module; the valve driving module comprises a plurality of acquisition and conditioning modules and a plurality of driving relay groups; the plurality of acquisition and conditioning modules are connected in parallel, and the first end of each acquisition and conditioning module is connected to one driving relay group, and the second end of each acquisition and conditioning module is electrically connected to the main control board; the driving relay group comprises a first relay and a second relay, and the first end of the acquisition and conditioning module is electrically connected to the first relay and the second relay respectively. The first relay and the second relay are used to switch the driving mode of the valve driving module; the acquisition and conditioning module is used to acquire the working state signal of the valve to be tested in each driving mode and transmit the working state signal to the main control board for testing. The valve test circuit further comprises a first transistor and a second transistor; the collector of the first transistor is connected to the first end of the first relay, the emitter of the first transistor and the second end of the first relay are respectively connected to the first end of the voltage acquisition module in the acquisition and conditioning module, and the third end of the first relay is connected to the driving power supply.

2. The valve testing circuit of claim 1, wherein, The emitter of the second transistor is connected to the first end of the second relay, the collector of the first transistor and the second end of the second relay are respectively connected to the second end of the current acquisition module in the acquisition and conditioning module, and the third end of the second relay is connected to the driving power supply. The valve driving module further comprises a release resistance switching module; the release resistance switching module is electrically connected to the first end and the second end of the input end of the acquisition and conditioning module.

3. The valve testing circuit of claim 1, wherein, The release resistance switching module comprises a first branch, a second branch, a third branch and a fourth branch; the first branch, the second branch, the third branch and the fourth branch are respectively electrically connected to the two input ends of the acquisition and conditioning module.

4. The valve test circuit of claim 3, wherein, The first branch comprises a first switch, a first diode and a second diode connected in series; The second branch comprises a second switch, a third diode and a first resistor connected in series; The third branch comprises a third switch, a fourth diode and a second resistor connected in series; The fourth branch comprises a fourth switch, a fifth diode and a third resistor connected in series. Further comprising:

5. The valve testing circuit of claim 1, wherein, A matrix switching circuit; the matrix switching circuit is electrically connected to the output end of the acquisition and conditioning module. The matrix switching module comprises a plurality of double-pole single-throw relays; the plurality of double-pole single-throw relays are connected in parallel, and each double-pole single-throw relay is connected to one valve to be tested.

6. The valve test circuit of claim 5, wherein, The main control board comprises an FPGA controller, an isolation circuit and a digital circuit; 7. The valve testing circuit of claim 1, wherein, The output end of the FPGA controller is electrically connected to the input end of the isolation circuit, and is used to generate a digital control signal of the valve driving module and transmit the digital control signal to the isolation circuit; The output end of the isolation circuit is electrically connected to the input end of the digital circuit, and is used to isolate the digital control signal and transmit the isolated digital control signal to the digital circuit. ​ 8. The valve test circuit of claim 7, wherein, The valve driving module further comprises a control signal circuit; The output end of the control signal circuit is electrically connected with the driving relay group, the input end of the control signal circuit is electrically connected with the digital circuit, and the control signal circuit is used for receiving the isolated digital control signal transmitted by the digital circuit and transmitting the isolated digital control signal to the driving relay group.

9. The valve testing circuit of claim 1, wherein, The valve driving module further comprises a collection output circuit; The input end of the collection output circuit is connected with the output end of the collection conditioning module; and the collection output circuit is used for receiving the working state signal.

10. The valve testing circuit of claim 1, wherein, The collection conditioning module comprises a voltage measuring device, a current measuring device and a resistance measuring device; the first measuring end of the voltage measuring device is electrically connected with the first measuring end of the resistance measuring device through a first bidirectional switch; the second measuring end of the voltage measuring device is electrically connected with the first measuring end of the current measuring device; and the second measuring end of the current measuring device is electrically connected with the second measuring end of the resistance measuring device through a second bidirectional switch.

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