Platen monitoring circuit and method

Abstract

The present application relates to a pressure plate monitoring circuit and method. The pressure plate monitoring circuit includes a state acquisition circuit, a voltage acquisition circuit and a processor; the state acquisition circuit and the voltage acquisition circuit are respectively connected to the processor; the state acquisition circuit is used to acquire the insertion and withdrawal status of the outlet pressure plate; the voltage acquisition circuit is used to respectively acquire the first voltage at the first end of the outlet pressure plate and the second voltage at the second end of the outlet pressure plate; the processor is used to determine whether the outlet pressure plate is abnormal based on the insertion and withdrawal status, the first voltage and the second voltage. The present application accurately obtains the status information and voltage information of the outlet pressure plate through the state acquisition circuit and the voltage acquisition circuit, and then determines whether the outlet pressure plate is abnormal based on the status information and voltage information of the outlet pressure plate through the processor. The entire pressure plate monitoring process does not require manual on-site inspection, which avoids the low accuracy of monitoring the status of the outlet pressure plate in traditional methods, thereby improving the accuracy of monitoring the status of the outlet pressure plate.

Description

Technical Field

[0001] The present application relates to the technical field of substation equipment monitoring, and in particular to a pressure plate monitoring circuit and method. Background Art

[0002] In substation automation systems, protective pressure plates are a crucial component. The outlet pressure plate is a crucial component. If the outlet pressure plate experiences wiring breakage or poor contact, accidents can easily occur. In such cases, the circuit breaker cannot trip or close properly, preventing it from quickly isolating the fault. Therefore, monitoring the outlet pressure plate is an essential component of substation automation systems.

[0003] In conventional technology, manual inspections are usually performed on-site at intervals to determine whether the appearance of the outlet pressure plate is in a normal state, thereby determining whether the outlet pressure plate is in a correct state of engagement and withdrawal.

[0004] However, the accuracy of detecting and monitoring the status of the outlet pressure plate by manually inspecting the appearance of the outlet pressure plate on site is low. Summary of the Invention

[0005] Based on this, it is necessary to provide a pressure plate monitoring circuit and method that can accurately monitor the status of the outlet pressure plate in response to the above technical problems.

[0006] In a first aspect, the present application provides a pressure plate monitoring circuit. The pressure plate monitoring circuit includes a state acquisition circuit, a voltage acquisition circuit, and a processor; the state acquisition circuit and the voltage acquisition circuit are respectively connected to the processor;

[0007] Status acquisition circuit, used to collect the status of the outlet pressure plate;

[0008] A voltage acquisition circuit, used for respectively acquiring a first voltage at the first end of the outlet pressure plate and a second voltage at the second end of the outlet pressure plate;

[0009] The processor is used to determine whether the outlet pressure plate is abnormal according to the insertion and withdrawal state, the first voltage and the second voltage.

[0010] In one embodiment, the processor includes a data selector, and the voltage acquisition circuit includes a first sub-acquisition circuit and a second sub-acquisition circuit; a first input port of the data selector is connected to the state acquisition circuit, a second input port of the data selector is connected to the first sub-acquisition circuit, and a third input port of the data selector is connected to the second sub-acquisition circuit;

[0011] A data selector is used to output a status signal according to the launch / retraction state, the first voltage and the second voltage, wherein the status signal indicates whether the outlet pressure plate is abnormal;

[0012] A first sub-collection circuit, configured to collect a first voltage;

[0013] The second sub-collection circuit is used to collect the second voltage.

[0014] In one embodiment, the pressure plate monitoring circuit further includes a prompt device, and the output port of the data selector is connected to the prompt device;

[0015] The prompt device is used to provide corresponding prompts according to the status signal output by the data selector.

[0016] In one embodiment, the state acquisition circuit includes a first contact and a second contact, the first contact is connected to the first power supply terminal, and the second contact is connected to the first input port of the data selector;

[0017] The first contact point is connected to the second contact point when the outlet pressure plate is in the exit state.

[0018] In one embodiment, the pressure plate monitoring circuit also includes a tripping circuit, the first sub-acquisition circuit includes a first relay, the first input end of the first relay is connected to the first port of the tripping circuit, the second input end of the first relay is grounded, the first contact of the first relay is connected to the second input port of the data selector, and the second contact of the first relay is connected to the first power supply end.

[0019] In one embodiment, the trip circuit further includes a position contact and a trip coil; the position contact is connected to the first port of the trip circuit and the first end of the trip coil respectively; and the second end of the trip coil is connected to the second power supply end.

[0020] In one embodiment, the pressure plate monitoring circuit also includes a tripping circuit, the second sub-acquisition circuit includes a second relay, the first input end of the second relay is connected to the second port of the tripping circuit, and the second input end of the second relay is grounded; the first contact of the second relay is connected to the third input port of the data selector, and the second contact of the second relay is connected to the first power supply end.

[0021] In one embodiment, the trip circuit further includes an action contact; the action contact is respectively connected to the second port and the third power supply terminal of the trip circuit.

[0022] In a second aspect, the present application provides a pressure plate monitoring method. The method is applied to the pressure plate detection circuit in any embodiment of the first aspect, and the method includes:

[0023] Collect the status of the outlet pressure plate;

[0024] respectively collecting a first voltage at a first end of the outlet pressure plate and a second voltage at a second end of the outlet pressure plate;

[0025] Determine whether the outlet pressure plate is abnormal based on the in / out state, the first voltage and the second voltage.

[0026] In one embodiment, the determining whether the outlet pressure plate is abnormal based on the insertion / retraction state, the first voltage, and the second voltage includes:

[0027] When the outlet pressure plate is in the engaged state, if the first voltage is at a high level and the second voltage is at a low level, or the first voltage is at a low level and the second voltage is at a high level, the outlet pressure plate is in an abnormal state.

[0028] In one embodiment, the determining whether the outlet pressure plate is abnormal based on the insertion / retraction state, the first voltage, and the second voltage includes:

[0029] When the outlet pressure plate is in the exit state, if the first voltage is at a high level and the second voltage is at a high level, or the first voltage is at a low level and the second voltage is at a high level, the outlet pressure plate is in an abnormal state.

[0030] The above-mentioned pressure plate monitoring circuit and method, the pressure plate monitoring circuit includes a state acquisition circuit, a voltage acquisition circuit and a processor; the state acquisition circuit and the voltage acquisition circuit are respectively connected to the processor; the state acquisition circuit acquires the insertion and withdrawal status of the outlet pressure plate; the voltage acquisition circuit respectively acquires the first voltage at the first end of the outlet pressure plate and the second voltage at the second end of the outlet pressure plate; the processor determines whether the outlet pressure plate is abnormal based on the insertion and withdrawal status, the first voltage and the second voltage. The present application accurately obtains the insertion and withdrawal status of the outlet pressure plate, the first voltage at the first end of the outlet pressure plate and the second voltage at the second end of the outlet pressure plate through the state acquisition circuit and the voltage acquisition circuit, and then determines whether the outlet pressure plate is abnormal based on the state information and voltage information of the above-mentioned outlet pressure plate through the processor. The entire pressure plate monitoring process uses the state information and voltage information of the outlet pressure plate to determine whether the outlet pressure plate is abnormal, without the need for manual on-site inspection, avoiding the situation where the outlet pressure plate's appearance appears normal when manually observed, but the circuit connecting the outlet pressure plate is not connected, resulting in low accuracy in monitoring the outlet pressure plate's state, thereby improving the accuracy of monitoring the outlet pressure plate's state. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 Schematic diagram of the structure of a pressure plate monitoring circuit in one embodiment;

[0032] Figure 2 is a connection diagram of a pressure plate monitoring circuit in one embodiment;

[0033] Figure 3 A schematic diagram of the connection between the state acquisition circuit and the voltage acquisition circuit in one embodiment;

[0034] Figure 4 A schematic diagram of the connection of a trip circuit in one embodiment;

[0035] Figure 5 Schematic diagram of the process of a pressure plate monitoring method in one embodiment. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solutions and advantages of this application more clear, the following further describes this application in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0037] In the substation automation system, the protection pressure plate is a very important component. Among them, the outlet pressure plate is an important component of the protection pressure plate. If the outlet pressure plate has broken wiring or poor contact, accidents are likely to occur. At this time, the circuit breaker cannot trip or close normally, resulting in the circuit breaker being unable to quickly isolate the fault. Therefore, monitoring the outlet pressure plate is an indispensable part of the substation automation system. In traditional technology, manual on-site inspections are usually used to check whether the appearance of the outlet pressure plate is in a normal state during intervals, so as to determine whether the outlet pressure plate is in the correct state. However, when manually inspecting the appearance of the outlet pressure plate on site, it is only possible to judge whether the circuit connected to the outlet pressure plate is normal based on the appearance of the outlet pressure plate. However, the normal appearance of the outlet pressure plate does not mean that the circuit connected to the outlet pressure plate is necessarily in the connected state. Therefore, manual on-site inspections of the appearance of the outlet pressure plate cannot monitor the actual situation of the outlet pressure plate, and the accuracy of detecting and monitoring the status of the outlet pressure plate is low.

[0038] Based on this, the present application provides a pressure plate monitoring circuit and method that can accurately monitor the status of the outlet pressure plate.

[0039] In one embodiment, Figure 1 As shown, Figure 1 This is a structural diagram of a pressure plate monitoring circuit in an embodiment. The present application provides a pressure plate monitoring circuit 100, which includes a state acquisition circuit 110, a voltage acquisition circuit 120 and a processor 130; the state acquisition circuit 110 and the voltage acquisition circuit 120 are respectively connected to the processor 130; the state acquisition circuit 110 is used to collect the insertion and withdrawal status of the outlet pressure plate; the voltage acquisition circuit 120 is used to collect the first voltage at the first end of the outlet pressure plate and the second voltage at the second end of the outlet pressure plate respectively; the processor 130 is used to determine whether the outlet pressure plate is abnormal based on the insertion and withdrawal status, the first voltage and the second voltage.

[0040] In the embodiment of the present application, the pressure plate monitoring circuit 100 includes a state acquisition circuit 110, a voltage acquisition circuit 120, and a processor 130. The state acquisition circuit 110 is connected to the processor 130 to acquire the deployment and withdrawal status of the outlet pressure plate and transmit the deployment and withdrawal status of the outlet pressure plate to the processor 130. The voltage acquisition circuit 120 is connected to the processor 130 to respectively acquire a first voltage at the first end of the outlet pressure plate and a second voltage at the second end of the outlet pressure plate, and transmit the first voltage at the first end of the outlet pressure plate and the second voltage at the second end of the outlet pressure plate to the processor 130. The processor 130 receives the deployment and withdrawal status, the first voltage, and the second voltage, and determines whether the outlet pressure plate is abnormal based on the deployment and withdrawal status, the first voltage, and the second voltage.

[0041] The above embodiment provides a pressure plate monitoring circuit, which includes a state acquisition circuit, a voltage acquisition circuit and a processor; the state acquisition circuit acquires the insertion and withdrawal status of the outlet pressure plate; the voltage acquisition circuit respectively acquires the first voltage at the first end of the outlet pressure plate and the second voltage at the second end of the outlet pressure plate; the processor determines whether the outlet pressure plate is abnormal based on the insertion and withdrawal status, the first voltage and the second voltage. The embodiment of the present application accurately obtains the insertion and withdrawal status of the outlet pressure plate, the first voltage at the first end of the outlet pressure plate and the second voltage at the second end of the outlet pressure plate through the state acquisition circuit and the voltage acquisition circuit, and then determines whether the outlet pressure plate is abnormal based on the state information and voltage information of the above-mentioned outlet pressure plate through the processor. The entire pressure plate monitoring process uses the state information and voltage information of the outlet pressure plate to determine whether the outlet pressure plate is abnormal, without the need for manual on-site inspection, avoiding the situation where the outlet pressure plate's appearance appears normal when manually observed, but the circuit connecting the outlet pressure plate is not connected, resulting in low accuracy in monitoring the outlet pressure plate's state, thereby improving the accuracy of monitoring the outlet pressure plate's state.

[0042] In one embodiment, Figure 2 As shown, Figure 2 The figure is a connection diagram of a pressure plate monitoring circuit in one embodiment. The processor 130 includes a data selector 132, and the voltage acquisition circuit 120 includes a first sub-acquisition circuit 122 and a second sub-acquisition circuit 124. The first input port of the data selector 132 is connected to the status acquisition circuit 110, the second input port of the data selector 132 is connected to the first sub-acquisition circuit 122, and the third input port of the data selector 132 is connected to the second sub-acquisition circuit 124. The data selector 132 is used to output a status signal based on the input and output status, the first voltage, and the second voltage. The status signal indicates whether the outlet pressure plate is abnormal. The first sub-acquisition circuit 122 is used to collect the first voltage. The second sub-acquisition circuit 124 is used to collect the second voltage.

[0043] In an embodiment of the present application, the processor 130 includes a data selector 132, which may be an 8-to-1 data selector 74LS151 with complementary outputs, as shown in Table 1, which is a truth table of the data selector 74LS151 in the pressure plate monitoring circuit.

[0044] Table 1

[0045]

[0046] The first input port of the data selector 132 is connected to the state acquisition circuit 110, the second input port of the data selector 132 is connected to the first sub-acquisition circuit 122, and the third input port of the data selector 132 is connected to the second sub-acquisition circuit 124. The data selector 132 selects an output state signal based on the in / out state, the first voltage, and the second voltage. For example, if the outlet pressure plate is in the in / out state, and the first voltage is high and the second voltage is low, the data selector selects to output that the outlet pressure plate is in an abnormal state. If the outlet pressure plate is in the in / out state, and the first voltage is low and the second voltage is high, the data selector selects to output that the outlet pressure plate is in an abnormal state. If the outlet pressure plate is in the in / out state, and the first voltage is high and the second voltage is high, the data selector selects to output that the outlet pressure plate is in an abnormal state. If the outlet pressure plate is in the in / out state, and the first voltage is low and the second voltage is high, the data selector selects to output that the outlet pressure plate is in an abnormal state.

[0047] The voltage acquisition circuit 120 includes a first sub-acquisition circuit 122 and a second sub-acquisition circuit 124. The first sub-acquisition circuit 122 acquires the first voltage, while the second sub-acquisition circuit 124 acquires the second voltage. For example, the first and second voltages can be acquired using a voltmeter, or by determining whether voltage exists at both ends of the outlet pressure plate based on the state of the normally open contacts in the trip circuit.

[0048] The above embodiment uses the state acquisition circuit, the first sub-acquisition circuit, and the second sub-acquisition circuit to accurately acquire the outlet pressure plate's engagement and withdrawal status, the first voltage at the outlet pressure plate's first end, and the second voltage at the outlet pressure plate's second end. The data selector then determines whether the outlet pressure plate is abnormal based on this outlet pressure plate state information and voltage information. The entire pressure plate monitoring process uses this outlet pressure plate state information and voltage information to determine whether the outlet pressure plate is abnormal, eliminating the need for manual on-site inspections. This avoids the situation where manual observation of the outlet pressure plate's appearance appears normal, but the circuit connecting the outlet pressure plate is not connected, resulting in low accuracy in monitoring the outlet pressure plate's status. This improves the accuracy of outlet pressure plate status monitoring.

[0049] In one embodiment, combined Figure 2 As shown, the pressure plate monitoring circuit 100 further includes a prompt device 140 , and the output port of the data selector 132 is connected to the prompt device 140 ; ​​the prompt device 140 is used to provide corresponding prompts according to the status signal output by the data selector 132 .

[0050] In the embodiment of the present application, the pressure plate monitoring circuit 100 further includes a prompting device 140. Optionally, prompting device 140 may be at least one of a red / green indicator light, a buzzer, a hazard warning light, and other prompting devices, which are not limited herein. The output port of the data selector 132 is connected to prompting device 140. Prompting device 140 is configured to provide a corresponding prompt based on the status signal output by the data selector 132, i.e., whether the outlet pressure plate is in an abnormal state.

[0051] In the above-described embodiment, the pressure plate monitoring circuit further includes a prompt device, and the output port of the data selector is connected to the prompt device so as to provide a corresponding prompt based on the status signal output by the data selector. In this embodiment, the prompt device is connected to the output port of the data selector, thereby providing a corresponding prompt based on the status signal output by the data selector to determine whether the outlet pressure plate is abnormal.

[0052] In one embodiment, Figure 2 As shown, the state acquisition circuit 110 includes a first contact FW1 and a second contact FW2. The first contact FW1 is connected to the first power supply terminal V1, and the second contact FW2 is connected to the first input port C pin of the data selector 132. The first contact FW1 and the second contact FW2 are connected when the outlet pressure plate is in the exit state.

[0053] In the embodiment of the present application, the state acquisition circuit 110 includes a first contact FW1 and a second contact FW2. The first contact FW1 is connected to the first power supply terminal V1, and the second contact FW2 is connected to the first input port C pin of the data selector 132. Optionally, the first power supply terminal V1 is usually +5V to +7V, which is not limited in this application. Figure 3 As shown, Figure 3 The figure is a connection diagram of the state acquisition circuit and the voltage acquisition circuit in one embodiment. By setting a first contact FW1 and a second contact FW2 at both ends of the exit position of the outlet pressure plate, when the outlet pressure plate is in the exit state, the outlet pressure plate will press the two end contacts of the exit position, and the first contact FW1 and the second contact FW2 can be connected. At this time, the loop from the first power supply terminal V1 to the first input port C pin of the data selector 132 is turned on, and the first input port C pin inputs positive electricity.

[0054] In the above embodiment, the state acquisition circuit includes a first contact and a second contact. The first contact FW1 is connected to the first power supply terminal, and the second contact is connected to the first input port of the data selector. The first and second contacts are connected when the outlet pressure plate is in the withdrawn state. This embodiment determines whether the outlet pressure plate is in the withdrawn state through the first and second contacts of the state acquisition circuit, thereby collecting the outlet pressure plate status information. This collected outlet pressure plate status information is then input into the data selector, laying the foundation for the data selector to subsequently accurately detect whether the outlet pressure plate is abnormal.

[0055] In one embodiment, combined Figure 2 and Figure 3 As shown, the pressure plate monitoring circuit 100 also includes a tripping circuit 150, and the first sub-acquisition circuit 122 includes a first relay J1, a first input end of the first relay J1 is connected to the first port 152 of the tripping circuit 150, a second input end of the first relay J1 is grounded, a first contact of the first relay J1 is connected to the second input port of the data selector 132, and a second contact of the first relay J1 is connected to the first power supply end.

[0056] In an embodiment of the present application, the pressure plate monitoring circuit 100 further includes a tripping circuit 150. The first sub-collection circuit 122 includes a first relay J1. The first input terminal of the first relay J1 is connected to the first port 152 of the tripping circuit 150, and the second input terminal of the first relay J1 is grounded. The first relay J1 includes a first normally open contact SJ. Optionally, a first diode T1 may be connected between the first relay J1 and the first port 152 of the tripping circuit 150. The first contact of the first relay J1 is connected to the second input port A pin of the data selector 132, and the second contact of the first relay J1 is connected to the first power supply terminal V1. By connecting a voltage-type relay in parallel to the first end of the outlet pressure plate, that is, connecting the first relay J1 to the first port 152 of the tripping circuit 150, when a voltage is present at the first port 152 of the tripping circuit 150, that is, when a voltage is present at the first end of the outlet pressure plate, the relay is activated, the first normally open contact SJ is closed, and the circuit from the first power supply terminal V1 to the second input port A pin of the data selector 132 is conductive, and the second input port A pin is input with a positive voltage.

[0057] In the above embodiment, the pressure plate monitoring circuit also includes a trip circuit, and the first sub-acquisition circuit includes a first relay, a first input end of the first relay is connected to the first port of the trip circuit, a second input end of the first relay is grounded, a first contact of the first relay is connected to the second input port of the data selector, and a second contact of the first relay is connected to the first power supply end. This embodiment determines whether there is voltage at the first end of the outlet pressure plate through the circuit connection of the voltage acquisition circuit and the state of the first normally open contact SJ, thereby collecting the first voltage information of the outlet pressure plate, and inputting the collected first voltage information of the outlet pressure plate into the data selector, laying the foundation for the subsequent data selector to accurately detect whether the outlet pressure plate is abnormal.

[0058] In one embodiment, Figure 4 As shown, Figure 4 Schematic diagram of the connection of the tripping circuit 150 in one embodiment. The tripping circuit 150 also includes a position contact QF and a tripping coil 156. The position contact QF is connected to the first port of the tripping circuit 150 and the first end of the tripping coil 156 respectively. The second end of the tripping coil 156 is connected to the second power supply terminal V2.

[0059] In an embodiment of the present application, the tripping circuit 150 further includes a position contact QF and a tripping coil 156. The position contact QF is connected to the first port of the tripping circuit 150 and the first end of the tripping coil 156, respectively, and the second end of the tripping coil 156 is connected to the second power supply terminal V2. The first port of the tripping circuit 150 is the first end 152 of the outlet pressure plate, and the tripping coil 156 is used to close the tripping circuit 150 by pressing the opening and closing button in the closing indication state, so that the coil is energized to realize the tripping action. Optionally, in this embodiment, the voltage of the second power supply terminal V2 is -55V. A circuit breaker refers to a switching device that can close, carry and disconnect currents under normal circuit conditions and can close, carry and disconnect currents under abnormal circuit conditions within a specified time. The circuit breaker includes a position contact QF and an action contact TJ. When the circuit breaker is in the closed position, the position contact QF is closed. At this time, if the outlet pressure plate is in a normal state, the voltage at the first end of the outlet pressure plate should be -55V; when the circuit breaker is in the open position, the position contact QF is disconnected. At this time, if the outlet pressure plate is in a normal state, the voltage at the first end of the outlet pressure plate should be 0V.

[0060] In the above embodiment, the trip circuit further includes a position contact and a trip coil; the position contact is connected to the first port of the trip circuit and the first end of the trip coil, respectively; and the second end of the trip coil is connected to the second power supply terminal. This embodiment uses the position contact and the trip coil of the trip circuit and their connection relationship to determine whether the first end of the outlet pressure plate is in an abnormal state, laying the foundation for the subsequent data selector to accurately detect whether the outlet pressure plate is abnormal.

[0061] In one embodiment, combined Figure 2 and Figure 3 As shown, the pressure plate monitoring circuit 100 also includes a tripping circuit 150, and the second sub-acquisition circuit 124 includes a second relay J2, a first input end of the second relay J2 is connected to the second port 154 of the tripping circuit 150, and a second input end of the second relay J2 is grounded; a first contact of the second relay J2 is connected to the third input port of the data selector 132, and a second contact of the second relay J2 is connected to the first power supply end.

[0062] In the embodiment of the present application, the pressure plate monitoring circuit 100 further includes a tripping circuit 150, and the second sub-acquisition circuit 124 includes a second relay J2. The first input terminal of the second relay J2 is connected to the second port 154 of the tripping circuit 150, and the second input terminal of the second relay J2 is grounded. The second relay J2 includes a second normally open contact XJ. Optionally, a second diode T2 may be connected between the second relay J2 and the second port 154 of the tripping circuit 150. The first contact of the second relay J2 is connected to the third input port B pin of the data selector 132, and the second contact of the second relay J2 is connected to the first power supply terminal V1. By connecting a voltage-type relay in parallel to the second end 154 of the outlet pressure plate, that is, connecting the second relay J2 to the second port 154 of the tripping circuit 150, when there is voltage at the second port 154 of the tripping circuit 150, that is, there is voltage at the second end 154 of the outlet pressure plate, the relay operates and the second normally open contact XJ closes. At this time, the loop from the first power supply terminal V1 to the third input port B pin of the data selector 132 is connected, and the third input port B pin inputs positive electricity.

[0063] In the above embodiment, the pressure plate monitoring circuit also includes a trip circuit, and the second sub-collection circuit includes a second relay, wherein the first input terminal of the second relay is connected to the second port of the trip circuit, and the second input terminal of the second relay is grounded; the first contact of the second relay is connected to the third input port of the data selector, and the second contact of the second relay is connected to the first power supply terminal. This embodiment determines whether there is voltage at the second end of the outlet pressure plate through the circuit connection of the voltage collection circuit and the state of the second normally open contact XJ, thereby collecting the second voltage information of the outlet pressure plate, and inputting the collected second voltage information of the outlet pressure plate into the data selector, laying the foundation for the subsequent data selector to accurately detect whether the outlet pressure plate is abnormal.

[0064] In one embodiment, Figure 4 As shown, the tripping circuit 150 further includes an action contact TJ; the action contact TJ is connected to the second port and the third power supply terminal V3 of the tripping circuit 150 respectively.

[0065] In the embodiment of the present application, the trip circuit 150 further includes an actuating contact TJ, which is connected to the second port of the trip circuit 150 and the third power supply terminal V3, respectively. The second port of the trip circuit 150 is the second end 154 of the outlet pressure plate. The trip coil 156 is used to close the trip circuit 150 when the opening / closing button is pressed in the closing indication state, thereby energizing the coil and achieving a tripping action. Optionally, in this embodiment, the voltage of the third power supply terminal V3 is +55V. The circuit breaker includes a position contact QF and an actuating contact TJ. When the circuit breaker is in the closed position, the actuating contact TJ is closed. At this time, if the outlet pressure plate is in a normal state, the voltage at the second end of the outlet pressure plate should be +55V. However, in actual operation, the closed state of the actuating contact TJ only lasts for a few milliseconds at most, so the closed state of the actuating contact TJ can be ignored. When the circuit breaker is in the open position, the actuating contact TJ is open. At this time, if the outlet pressure plate is in a normal state, the voltage at the second end of the outlet pressure plate should be 0V.

[0066] In the above embodiment, the trip circuit further includes an actuating contact connected to the second port and the third power supply terminal of the trip circuit, respectively. This embodiment uses the actuating contact of the trip circuit and its connection relationship to determine whether the second end of the outlet pressure plate is in an abnormal state, laying the foundation for the subsequent data selector to accurately detect whether the outlet pressure plate is abnormal.

[0067] In one embodiment, Figure 5 As shown, a pressure plate monitoring method is provided, which is described by taking the method applied to the pressure plate monitoring circuit of the above embodiment as an example, and includes the following steps:

[0068] Step 520: Collect the status of the outlet pressure plate.

[0069] Specifically, the outlet pressure plate's engagement and withdrawal status is represented by whether the outlet pressure plate is in a closed or disconnected state, i.e., if the outlet pressure plate is closed, it represents that the outlet pressure plate is in an engaged state, and if the outlet pressure plate is disconnected, it represents that the outlet pressure plate is in a withdrawn state. In the embodiment of the present application, the state acquisition circuit 110 in the pressure plate monitoring circuit 100 collects the outlet pressure plate's engagement and withdrawal status information.

[0070] Step 540 : respectively collecting a first voltage at the first end of the outlet pressure plate and a second voltage at the second end of the outlet pressure plate.

[0071] In the embodiment of the present application, the voltage acquisition circuit 120 in the pressure plate monitoring circuit 100 acquires a first voltage at the first end of the outlet pressure plate and a second voltage at the second end of the outlet pressure plate. The first voltage is acquired by a first sub-acquisition circuit 122, and the second voltage is acquired by a second sub-acquisition circuit 124.

[0072] Step 560: Determine whether the outlet pressure plate is abnormal based on the in / out state, the first voltage, and the second voltage.

[0073] Specifically, the processor 130 receives the aforementioned launch and retraction status, the first voltage, and the second voltage, and determines whether the outlet pressure plate is in an abnormal state based on the aforementioned launch and retraction status, the first voltage, and the second voltage. In the embodiment of the present application, the data selector 132 receives the aforementioned launch and retraction status, the first voltage, and the second voltage, and determines whether the outlet pressure plate is in an abnormal state based on the aforementioned launch and retraction status, the first voltage, and the second voltage.

[0074] In the above-mentioned pressure plate monitoring method, the insertion and withdrawal status of the outlet pressure plate is collected; the first voltage at the first end of the outlet pressure plate and the second voltage at the second end of the outlet pressure plate are collected respectively; and whether the outlet pressure plate is abnormal is determined based on the insertion and withdrawal status, the first voltage and the second voltage. The present application accurately obtains the insertion and withdrawal status of the outlet pressure plate, the first voltage at the first end of the outlet pressure plate and the second voltage at the second end of the outlet pressure plate through the status acquisition circuit and the voltage acquisition circuit, and then determines whether the outlet pressure plate is abnormal based on the status information and voltage information of the above-mentioned outlet pressure plate through the processor. The entire pressure plate monitoring process uses the status information and voltage information of the outlet pressure plate to determine whether the outlet pressure plate is abnormal, and there is no need for manual on-site inspection, which avoids the situation where manual observation shows that the appearance of the outlet pressure plate is normal, but the circuit connecting the outlet pressure plate is not connected, resulting in low accuracy in monitoring the status of the outlet pressure plate, thereby improving the accuracy of monitoring the status of the outlet pressure plate.

[0075] In one embodiment, the process of monitoring whether the outlet pressure plate is abnormal based on the engagement / disengagement state, the first voltage, and the second voltage may include: when the outlet pressure plate is in the engagement state, if the first voltage is high and the second voltage is low, or the first voltage is low and the second voltage is high, then the outlet pressure plate is in an abnormal state; and when the outlet pressure plate is in the disengagement state, if the first voltage is high and the second voltage is high, or the first voltage is low and the second voltage is high, then the outlet pressure plate is in an abnormal state.

[0076] Specifically, by analyzing the outlet pressure plate's in-and-out state, the first voltage at the outlet pressure plate's first end, and the second voltage at the outlet pressure plate's second end in the pressure plate monitoring circuit 100, it can be determined that when the outlet pressure plate is in the in-and-out state, if the first voltage is high and the second voltage is low, or if the first voltage is low and the second voltage is high, the outlet pressure plate is in an abnormal state. When the outlet pressure plate is in the out-and-out state, if the first voltage is high and the second voltage is high, or if the first voltage is low and the second voltage is high, the outlet pressure plate is in an abnormal state. Furthermore, it can be determined that when the outlet pressure plate's in-and-out state, the first voltage at the outlet pressure plate's first end, and the second voltage at the outlet pressure plate's second end are in different states, the outlet pressure plate is in different states, as shown in Table 2. Table 2 shows the different states that the outlet pressure plate may be in.

[0077] Table 2

[0078]

[0079] The three state quantities of the outlet pressure plate's insertion and withdrawal state, the first voltage at the first end of the outlet pressure plate, and the second voltage at the second end of the outlet pressure plate are used as the three input quantities of the data selector 132. The output results obtained by analysis are shown in Table 3. Table 3 is a logical truth table obtained by inputting the above-mentioned outlet pressure plate's state information and voltage information into the data selector 132.

[0080] Table 3

[0081]

[0082] As shown in Table 2, when connecting the circuit, D0, D3, D4, and D6 should be connected to the first power supply terminal V1 to indicate that the outlet pressure plate is in a normal state; and D1, D2, D5, and D7 should be grounded to indicate that the outlet pressure plate is in an abnormal state. Subsequently, the data selector 132 and the prompt device 140 can output whether the outlet pressure plate is abnormal.

[0083] In this embodiment, when the outlet pressure plate is in the engaged state, if the first voltage is high and the second voltage is low, or the first voltage is low and the second voltage is high, then the outlet pressure plate is in an abnormal state. When the outlet pressure plate is in the withdrawn state, if the first voltage is high and the second voltage is high, or the first voltage is low and the second voltage is high, then the outlet pressure plate is in an abnormal state. The present application accurately obtains the engaged and withdrawn state of the outlet pressure plate, the first voltage at the first end of the outlet pressure plate, and the second voltage at the second end of the outlet pressure plate through a state acquisition circuit and a voltage acquisition circuit, and then determines whether the outlet pressure plate is abnormal based on the above-mentioned state information and voltage information of the outlet pressure plate through a processor. The entire pressure plate monitoring process uses the state information and voltage information of the outlet pressure plate to determine whether the outlet pressure plate is abnormal, eliminating the need for manual on-site inspection, avoiding the situation where manual observation of the outlet pressure plate's appearance appears normal, but the circuit connecting the outlet pressure plate is not connected, resulting in low accuracy in monitoring the outlet pressure plate's state, thereby improving the accuracy of monitoring the outlet pressure plate's state.

[0084] It should be understood that, although the steps in the flowcharts of the above embodiments are shown in sequence as indicated by the arrows, these steps are not necessarily performed in the order indicated by the arrows. Unless otherwise specified herein, there is no strict order restriction on the execution of these steps, and these steps can be performed in other orders. Moreover, at least a portion of the steps in the flowcharts of the above embodiments may include multiple steps or multiple stages, and these steps or stages are not necessarily performed at the same time, but can be performed at different times. The execution order of these steps or stages is not necessarily to be performed in sequence, but can be performed in turn or alternately with other steps or at least a portion of steps or stages in other steps.

[0085] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0086] The above embodiments merely illustrate several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art may make various modifications and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present application. Therefore, the scope of protection of the present application shall be determined by the appended claims.

Claims

1. A pressure plate monitoring circuit, characterized in that: The pressure plate monitoring circuit includes a state acquisition circuit, a voltage acquisition circuit and a processor; the state acquisition circuit and the voltage acquisition circuit are respectively connected to the processor; the processor includes a data selector; The state acquisition circuit is used to acquire the insertion and withdrawal status of the outlet pressure plate; the state acquisition circuit includes a first contact and a second contact, the first contact is connected to the first power supply terminal, and the second contact is connected to the first input port of the data selector; the first contact and the second contact are connected when the outlet pressure plate is in the withdrawal state; The voltage acquisition circuit is used to determine whether there is voltage at both ends of the outlet pressure plate according to the state of the normally open contact on the opening circuit in the pressure plate monitoring circuit, so as to respectively acquire a first voltage at the first end of the outlet pressure plate and a second voltage at the second end of the outlet pressure plate; The processor is configured to determine whether the outlet pressure plate is abnormal based on the engagement / disengagement state, the first voltage, and the second voltage; wherein, when the outlet pressure plate is in the engagement state, if the first voltage is high and the second voltage is low, or the first voltage is low and the second voltage is high, the data selector selects to output that the outlet pressure plate is in an abnormal state; and when the outlet pressure plate is in the disengagement state, if the first voltage is high and the second voltage is high, or the first voltage is low and the second voltage is high, the data selector selects to output that the outlet pressure plate is in an abnormal state. The voltage acquisition circuit includes a first sub-acquisition circuit and a second sub-acquisition circuit; the first input port of the data selector is connected to the state acquisition circuit, the second input port of the data selector is connected to the first sub-acquisition circuit, and the third input port of the data selector is connected to the second sub-acquisition circuit; The data selector is used to output a status signal according to the launch / retraction state, the first voltage, and the second voltage, wherein the status signal indicates whether the outlet pressure plate is abnormal; The first sub-collection circuit is used to collect the first voltage; The second sub-collection circuit is used to collect the second voltage.

2. The circuit according to claim 1, wherein: The pressure plate monitoring circuit further includes a prompt device, and the output port of the data selector is connected to the prompt device; The prompt device is used to provide corresponding prompts according to the status signal output by the data selector.

3. The circuit according to claim 1, wherein: The pressure plate monitoring circuit also includes a tripping circuit, and the first sub-acquisition circuit includes a first relay, a first input end of the first relay is connected to the first port of the tripping circuit, a second input end of the first relay is grounded, a first contact of the first relay is connected to the second input port of the data selector, and a second contact of the first relay is connected to the first power supply end.

4. The circuit according to claim 3, characterized in that The trip circuit further includes a position contact and a trip coil; the position contact is connected to the first port of the trip circuit and the first end of the trip coil respectively; the second end of the trip coil is connected to the second power supply end.

5. The circuit according to claim 1, wherein: The pressure plate monitoring circuit also includes a tripping circuit, and the second sub-acquisition circuit includes a second relay, the first input end of the second relay is connected to the second port of the tripping circuit, and the second input end of the second relay is grounded; the first contact of the second relay is connected to the third input port of the data selector, and the second contact of the second relay is connected to the first power supply end.

6. The circuit according to claim 5, characterized in that The opening circuit further includes an action contact; the action contact is respectively connected to the second port and the third power supply end of the opening circuit.

7. A pressure plate monitoring method, characterized in that: Applied to the pressure plate detection circuit according to any one of claims 1 to 6, the method comprises: Collect the status of the outlet pressure plate; respectively collecting a first voltage at the first end of the outlet pressure plate and a second voltage at the second end of the outlet pressure plate; According to the engagement and disengagement status, the first voltage and the second voltage, determine whether the outlet pressure plate is abnormal; wherein, when the outlet pressure plate is in the engagement state, if the first voltage is high and the second voltage is low, or the first voltage is low and the second voltage is high, then output that the outlet pressure plate is in an abnormal state; when the outlet pressure plate is in the disengagement state, if the first voltage is high and the second voltage is high, or the first voltage is low and the second voltage is high, then output that the outlet pressure plate is in an abnormal state.

8. The method according to claim 7, characterized in that The determining whether the outlet pressure plate is abnormal according to the in / out state, the first voltage, and the second voltage includes: When the outlet pressure plate is in the engaged state, if the first voltage is at a high level and the second voltage is at a low level, or the first voltage is at a low level and the second voltage is at a high level, it is output that the outlet pressure plate is in an abnormal state.

9. The method according to claim 7, characterized in that The determining whether the outlet pressure plate is abnormal according to the in / out state, the first voltage, and the second voltage includes: When the outlet pressure plate is in the exit state, if the first voltage is at a high level and the second voltage is at a high level, or the first voltage is at a low level and the second voltage is at a high level, it is output that the outlet pressure plate is in an abnormal state.

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