Control system based on multi-channel feedback signals of switching equipment

Abstract

The present invention provides a control system based on a multi-channel feedback signal of a switching device, comprising: a micro switch, a signal processing device connected to an external system and the micro switch, and a motor control device connected to the signal processing device; the micro switch is used to sense the position of the moving contact of the switching device to generate a multi-channel feedback signal; the signal processing device receives the control signal of the external system and the multi-channel feedback signal, and generates a motor control instruction of the switching device according to the last feedback signal received in the multi-channel feedback signal and the control signal; the motor control device controls the motor of the switching device according to the motor control instruction, and the motor controls the closing and opening of the main contacts of the switching device. The motor control instruction of the switching device is generated according to the last feedback signal received in the multi-channel feedback signal and the control signal, so as to improve the complete effectiveness of all feedback signals of the switching device and improve the stability of the system.

Description

Technical Field

[0001] The present invention relates to the field of rail transportation, and in particular to a control system based on multi-path feedback signals of a switching device. Background Art

[0002] The position of the moving contact of the switch device is an important basis for the control system to control. With the development of rail transit technology and the increasing complexity of the power system on the vehicle, the moving contact of the switch device is required to have multiple feedback signals at the set position to meet various purposes. Multiple feedback signals can be indirectly generated by using an auxiliary contact at the set position to control other contacts, or multiple auxiliary contacts can be used to directly generate multiple feedback signals.

[0003] Among them, in applications where multiple feedback signals are directly generated by multiple auxiliary contacts, when the purpose of the multiple feedback signals includes controlling the movement state of the moving contacts of the switching device, the feedback signal used to control the movement state of the moving contact changes earlier than the feedback signal for other purposes, and the control system directly updates the control command of the movement state of the moving contact according to the feedback signal. When the new control command is to stop, the moving contact is stopped and the linkage structure stops, which may cause the state of the auxiliary contacts for other subsequent purposes to fail to change, the corresponding feedback signal cannot change, the multiple feedback signals are incomplete, the control system falsely reports a switching device failure, and affects the system stability. Summary of the invention

[0004] In view of this, the present invention provides a control system based on multi-path feedback signals of a switching device, which can at least partially solve the problems existing in the prior art.

[0005] In order to achieve the above object, the present invention adopts the following technical solution:

[0006] A control system based on multi-path feedback signals of a switching device, comprising: a micro switch, a signal processing device connected to an external system and the micro switch, and a motor control device connected to the signal processing device;

[0007] The micro switch is used to sense the position of the moving contact of the switch device to generate multiple feedback signals;

[0008] The signal processing device receives a control signal from an external system and the multiple feedback signals, and generates a motor control instruction for the switch device according to a feedback signal received last among the multiple feedback signals and the control signal;

[0009] The motor control device controls the motor of the switch device according to the motor control instruction, and the motor controls the closing and opening of the main contacts of the switch device.

[0010] The signal processing device can also be integrated with the motor control device, and the micro switch is directly used as a part of the motor control loop.

[0011] Further, the micro switch comprises: a retractable trigger rod and at least two auxiliary switches;

[0012] The retractable trigger rod is located on the moving path of the moving contact linkage structure of the switch device when in the extended state, and triggers the control ends of the auxiliary switches in sequence during the compression process.

[0013] Furthermore, the first end of the auxiliary switch is connected to the power supply end of the signal processing device, the second end is connected to a feedback signal input end of the signal processing device, and the second end is also connected to the power supply common end of the signal processing device through a load loop.

[0014] Further, the control system based on the multi-channel feedback signal of the switching device also includes: a relay;

[0015] A first end of one of the auxiliary switches is connected to a power supply end of the signal processing device, a second end is connected to a feedback signal input end of the signal processing device, and the second end is also connected to a power supply common end of the signal processing device through a load loop;

[0016] A first end of another auxiliary switch is connected to the power supply end of the signal processing device, and a second end is connected to the power supply common end of the signal processing device through a control coil of a relay. One end of the contact of the relay is connected to the power supply end of the signal processing device, and the other end is connected to a feedback signal input end of the signal processing device. In addition, the other end of the contact of the relay is also connected to the power supply common end of the signal processing device through a load circuit.

[0017] Further, the micro switch comprises: at least two retractable trigger rods and at least two auxiliary switches corresponding to the retractable trigger rods one by one;

[0018] The at least two retractable trigger rods are arranged side by side on the moving path of the moving contact linkage structure of the switch device when in an extended state. The moving contact linkage structure of the switch device compresses each retractable trigger rod in turn during the movement process, and the retractable trigger rod triggers the control end of the corresponding auxiliary switch during the compression process.

[0019] Furthermore, the first end of the auxiliary switch is connected to the power supply end of the signal processing device, the second end is connected to a feedback signal input end of the signal processing device, and the second end is also connected to the power supply common end of the signal processing device through a load loop.

[0020] Further, the retractable trigger rod comprises: a trigger head, a retractable structure connected to the trigger head, and a trigger rod;

[0021] The trigger head is arranged on the moving path of the moving contact linkage structure of the switch device.

[0022] Furthermore, there are at least two micro switches, at least one micro switch is arranged at the moving contact linkage structure position when the switch device is in the disconnected state, and is used to sense the disconnected state of the switch device, and at least one micro switch is arranged at the moving contact linkage structure position when the switch device is in the closed state, and is used to sense the closed state of the switch device.

[0023] The control system based on the multi-channel feedback signal of the switch device provided by the present invention includes: a micro switch, a signal processing device connected to an external system and the micro switch, and a motor control device connected to the signal processing device; the micro switch is used to sense the position of the moving contact of the switch device to generate a multi-channel feedback signal; the signal processing device receives the control signal of the external system and the multi-channel feedback signal, and generates the motor control instruction of the switch device according to the last feedback signal received in the multi-channel feedback signal and the control signal; the motor control device controls the motor of the switch device according to the motor control instruction, and the motor controls the closing and opening of the main contact of the switch device. The control instruction of the switch device is generated according to the last feedback signal received in the multi-channel feedback signal and the control signal, so as to improve the complete effectiveness of all feedback signals of the switch device and improve the stability of the system.

[0024] In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the prior art descriptions. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0026] Figure 1 It is a structural block diagram of a control system based on multi-channel feedback signals of a switching device according to an embodiment of the present invention;

[0027] Figure 2 The first specific structure of the control system based on the multi-path feedback signal of the switching device according to the embodiment of the present invention is shown;

[0028] Figure 3 The second specific structure of the control system based on the multi-path feedback signal of the switching device according to the embodiment of the present invention is shown;

[0029] Figure 4The third specific structure of the control system based on the multi-path feedback signal of the switching device according to the embodiment of the present invention is shown;

[0030] Figure 5 The fourth specific structure of the control system based on the multi-path feedback signal of the switching device according to the embodiment of the present invention is shown;

[0031] Figure 6 A schematic diagram showing a retractable trigger rod of a micro switch in an embodiment of the present invention being compressed is shown. DETAILED DESCRIPTION

[0032] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0033] The detailed features and advantages of the present invention are described in detail in the following embodiments, and the contents are sufficient to enable any person skilled in the art to understand the technical content of the present invention and implement it accordingly, and according to the contents, claims and drawings disclosed in this specification, any person skilled in the art can easily understand the relevant purposes and advantages of the present invention. The following examples further illustrate the viewpoints of the present invention in detail, but do not limit the scope of the present invention in any viewpoint.

[0034] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0035] At present, in applications where multiple feedback signals are directly generated by multiple auxiliary contacts, when the purpose of the multiple feedback signals includes controlling the movement state of the moving contacts of the switching device, the feedback signal used to control the movement state of the moving contacts changes earlier than the feedback signals for other purposes. The control system directly updates the control command of the movement state of the moving contacts according to the feedback signal. When the new control command is to stop, the moving contacts are stopped and the linkage structure stops, which may cause the states of the auxiliary contacts for other subsequent purposes to fail to change, the corresponding feedback signals to fail to change, the multiple feedback signals to be incomplete, the control system to falsely report a switching device failure, and affect the system stability.

[0036] In order to at least partially solve the above-mentioned technical problems existing in the prior art, an embodiment of the present invention provides a control system based on multiple feedback signals of a switching device, which generates a control instruction for the switching device according to the last feedback signal received in the multiple feedback signals and the control signal, so as to improve the complete effectiveness of all feedback signals of the switching device and improve the system stability.

[0037] Figure 1 FIG. 1 is a structural block diagram of a control system based on multi-path feedback signals of a switching device according to an embodiment of the present invention. Figure 1 As shown, the control system based on the multi-channel feedback signal of the switching device includes: a micro switch 2, a signal processing device 3 connected to an external system 4 and the micro switch 2, and a motor control device 5 connected to the signal processing device 3;

[0038] It is worth noting that the external system 4 and the micro switch 2 can be connected to the signal processing device 3 by wire, specifically by wires, cables, optical fibers, etc.

[0039] The micro switch 2 is used to sense the position of the moving contact of the switch device 1 to generate a multi-channel feedback signal. Similarly, the motor control device 5 and the signal processing device 3 and the motor control device 5 and the switch device 1 can also be connected wirelessly or by wire.

[0040] The micro switch 2 is a mechanical switch.

[0041] The signal processing device 3 receives the control signal of the external system 4 and the multiple feedback signals, and generates the motor control instruction of the switching device 1 according to the last received feedback signal of the multiple feedback signals and the control signal;

[0042] The motor control device 5 controls the motor of the switch device 1 according to the motor control instruction, and the motor controls the closing and opening of the main contacts of the switch device.

[0043] The signal processing device can also be integrated with the motor control device, and the micro switch is directly used as a part of the motor control loop.

[0044] It is worth noting that after conducting extensive analysis and research on the false alarm of switch device failures in existing control systems, the applicant found that in the multi-channel feedback signals of the switch device, the changes in the states of different auxiliary contacts have a sequence, and this sequence is inevitable, predictable and fixed. There is a fixed sequence in the changes of multi-channel feedback signals. However, the use of multi-channel feedback signals in the existing design is not strictly designed according to the sequence of changes in the auxiliary contact states, resulting in false alarm of switch device failures.

[0045] However, the present application adopts the above-mentioned technical solution. When the moving contact of the switch device moves, it drives the linkage structure to move together. When it has not reached the set position, the state of the micro switch is normal. When the moving contact moves to the set position, the linkage structure triggers the state of the micro switch to the trigger state. The trigger state is opposite to the normal state, so that the micro switch feedbacks whether the moving contact of the switch device is at the set position. The micro switch is connected to the signal processing device, thereby causing the feedback signal to change, so as to perform corresponding processing according to the feedback signal, such as controlling the movement state of the moving contact of the switch device. Since multiple feedback signals are generated when the moving contact of the switch device moves to the set position, the control instruction of the switch device is generated according to the last feedback signal received in the multiple feedback signals and the control signal, so as to improve the complete effectiveness of all feedback signals of the switch device and improve the stability of the system.

[0046] Figure 2 FIG. 1 shows a first specific structure of a control system based on a multi-path feedback signal of a switching device according to an embodiment of the present invention. Figure 2 As shown, the switch device SW includes: a motor M, a screw rod S, a nut N, a moving contact DC, static contacts SC1 and SC2, and a linkage structure L. The nut N, the moving contact DC, and the linkage structure L are fixed together, and the three have the same motion state. The rotation of the motor M drives the screw rod S to rotate, and the nut N drives the moving contact DC to move linearly. The moving contact DC has three motion states: stop, move close to the static contacts SC1 and SC2, and move away from the static contacts SC1 and SC2. The static contacts SC1 and SC2 are fixed. When the motor M stops, the moving contact DC stops; when the motor M rotates forward, the moving contact DC moves close to the static contacts SC1 and SC2; when the motor M rotates reversely, the moving contact DC moves away from the static contacts SC1 and SC2. The static contacts SC1 and SC2 serve as the main circuit terminals T1 and T2 of the switch device. The static contacts SC1 and SC2 are not connected. When the moving contact DC contacts the static contacts SC1 and SC2, the switch device SW is closed. When the moving contact DC is separated from the static contacts SC1 and SC2, the switch device SW is disconnected. There is elastic space in the structure when the moving contact DC contacts or separates from the static contacts SC1 and SC2.

[0047] The moving contact DC has two setting positions, the first setting position P1 is the corresponding position when the moving contact realizes the disconnection of the switch, and the second setting position P2 is the corresponding position when the moving contact realizes the closing of the switch device. There are at least two micro switches, at least one micro switch X1 is set at the moving contact linkage structure position when the switch device is disconnected, that is, the P1 position, which is used to sense the disconnection state of the switch device, and at least one micro switch X2 is set at the moving contact linkage structure position when the switch device is closed, that is, the P2 position, which is used to sense the closing state of the switch device. At least two feedback signals are designed for each setting position, and the moving contact DC can only move between the two setting positions P1 and P2.

[0048] The control system CTRU includes: micro switches X1 and Y1, a signal processing device SPU and a motor control device MDR. The micro switch X1 is set at a first setting position P1, and the micro switch Y1 is set at a second setting position P2.

[0049] The micro switch X1 includes a retractable trigger rod TRG11 and two auxiliary switches A11 and B11. The retractable trigger rod TRG11 can be retracted and maintained in an extended state by an elastic structure in the absence of external force. At this time, the auxiliary switch A11 is disconnected and the auxiliary switch B11 is closed (the state of the auxiliary switch when there is no external force on the retractable trigger rod can be configured according to actual needs, and this is just an example). The retractable trigger rod TRG11 will interfere with the linkage structure L in space when it is in the extended state. The retractable trigger rod is located on the moving path of the moving contact linkage structure of the switch device in the extended state, and the control end of each auxiliary switch is triggered in sequence during the compression process. When the motor M drives the moving contact DC and the linkage structure L to move to the first set position P1, the retractable trigger rod TRG11 will be compressed. During the process of the retractable trigger rod TRG11 changing from the extended state to the compressed state, the switch control end of the auxiliary switch A11 is first triggered, so that the state of the auxiliary switch A11 changes from open to closed, and then the switch control end of the auxiliary switch B11 is triggered, so that the state of the auxiliary switch B11 changes from closed to open, and the sequence is fixed.

[0050] The micro switch Y1 includes a retractable trigger rod TRG12 and two auxiliary switches A12 and B12. The retractable trigger rod TRG12 can be retracted and maintained in an extended state by an elastic structure in the absence of external force. At this time, the auxiliary switch A12 is in an open state and the auxiliary switch B12 is in a closed state (the state of the auxiliary switch when there is no external force on the retractable trigger rod can be configured according to actual needs, and this is just an example). The retractable trigger rod TRG12 will interfere with the linkage structure L in space when it is in an extended state. The retractable trigger rod is located on the moving path of the linkage structure of the moving contact of the switch device when it is in an extended state, and the control end of each auxiliary switch is triggered in sequence during the compression process. When the motor M drives the moving contact DC and the linkage structure L to move to the second set position P2, the retractable trigger rod TRG12 will be compressed. When the retractable trigger rod TRG12 changes from an extended state to a compressed state, the state of the auxiliary switch A12 changes from an open state to a closed state first, and then the state of the auxiliary switch B12 changes from a closed state to an open state, and the order is fixed.

[0051] One end of the auxiliary switch A11 is connected to the feedback signal input terminal SA11 of the signal processing device SPU, and is also connected to the power common terminal COM of the signal processing device SPU through the resistor RA11, and the other end is connected to the power terminal VCC of the signal processing device SPU. The feedback signal SA11 is used to detect whether the moving contact DC is in the first set position P1.

[0052] One end of the auxiliary switch B11 is connected to the feedback signal input terminal SB11 of the signal processing device SPU, and is also connected to the power common terminal COM of the signal processing device SPU through the resistor RB11, and the other end is connected to the power terminal VCC of the signal processing device SPU. The feedback signal SB11 is used to control the DC motion state of the moving contact during the disconnection process.

[0053] One end of the auxiliary switch A12 is connected to the feedback signal input terminal SA12 of the signal processing device SPU, and is also connected to the power common terminal COM of the signal processing device SPU through the resistor RA12, and the other end is connected to the power terminal VCC of the signal processing device SPU. The feedback signal SA12 is used to detect whether the moving contact DC is in the second set position P2.

[0054] One end of the auxiliary switch B12 is connected to the feedback signal input terminal SB12 of the signal processing device SPU, and is also connected to the power common terminal COM of the signal processing device SPU through the resistor RB12, and the other end is connected to the power terminal VCC of the signal processing device SPU. The feedback signal SB12 is used to control the DC motion state of the moving contact during the closing process.

[0055] Design description of two feedback signals during the SW disconnection process of the switching device.

[0056] The control system CTRU receives the disconnection instruction of the switch device SW from the upper system (i.e., the external system) SPVR, and the signal processing device SPU detects the feedback signals SA11 and SB11. If SA11 is at a high level and SB11 is at a low level, it is considered that the switch device SW is already in the disconnected state, and the moving contact DC is directly controlled to stop moving; otherwise, the motor control device MDR controls the motor M to reverse, and the moving contact DC moves away from the static contacts SC1 and SC2 until the linkage structure L compresses the retractable trigger rod TRG1 of the micro switch X1 at the first set position P1. 1. First, the state of the auxiliary switch A11 changes from open to closed, the feedback signal SA11 changes from low level to high level, and the signal processing device SPU receives that the moving contact DC of the switch device SW is in the first set position P1. At this time, the motor M continues to reverse, and the moving contact DC continues to move away from the static contacts SC1 and SC2; then the state of the auxiliary switch B11 changes from closed to open, the feedback signal SB11 changes from high level to low level, the signal processing device SPU updates the moving contact DC movement state to stop, the motor control device MDR controls the motor M to stop, and the moving contact DC stops. Both feedback signals are complete and valid, and the operation of disconnecting the switch device SW is completed.

[0057] Design description of two feedback signals during the closing process of the switching device SW.

[0058] The control system CTRU receives the closing instruction of the switch device SW from the upper system SPVR, and the signal processing device SPU detects the feedback signals SA12 and SB12. If SA12 is high and SB12 is low, it is considered that the switch device SW is already in the closed state, and the moving contact DC is directly controlled to stop; otherwise, the motor control device MDR controls the motor M to rotate forward, and the moving contact DC moves close to the static contacts SC1 and SC2 until the linkage structure L compresses the retractable trigger rod TRG12 of the micro switch Y1 at the second set position P2, and the first First, the state of the auxiliary switch A12 changes from open to closed, the feedback signal SA12 changes from low level to high level, and the signal processing device SPU receives that the moving contact DC of the switch device SW is in the second set position P2. At this time, the motor M continues to rotate forward, and the moving contact DC continues to move close to the static contacts SC1 and SC2. Then, the state of the auxiliary switch B12 changes from closed to open, and the feedback signal SB12 changes from high level to low level. The signal processing device SPU updates the moving contact DC movement state to stop, and the motor control device MDR controls the motor M to stop, and the moving contact DC stops. Both feedback signals are complete and valid, and the closing operation of the switch device SW is completed.

[0059] Figure 3 FIG. 2 shows a second specific structure of a control system based on a multi-path feedback signal of a switching device according to an embodiment of the present invention. Figure 3As shown, the structure of the switch device SW is Figure 2 The structures of the switch devices SW shown are the same and will not be described in detail here.

[0060] The control system CTRU includes: two micro switches, a signal processing device SPU and a motor control device MDR, one of the micro switches is set at the setting position P1, and is composed of micro switches X21 and X22; the other micro switch is set at the setting position P2, and is composed of micro switches Y21 and Y22.

[0061] The micro switch X21 includes a retractable trigger rod TRGX21 and an auxiliary switch A21. The retractable trigger rod TRGX21 can be retracted and maintained in an extended state by an elastic structure in the absence of external force. At this time, the auxiliary switch A21 is disconnected (the state of the auxiliary switch when there is no external force on the retractable trigger rod can be configured according to actual needs, and this is just an example). The retractable trigger rod TRGX21 will interfere with the linkage structure L in space when it is in the extended state. When the motor M drives the moving contact DC and the linkage structure L to move to the first set position P1, the retractable trigger rod TRGX21 will be compressed, and the retractable trigger rod TRGX21 will change from the extended state to the compressed state, and the state of the auxiliary switch A21 will change from the open state to the closed state.

[0062] The micro switch X22 includes a retractable trigger rod TRGX22 and an auxiliary switch A22. The retractable trigger rod TRGX22 can be retracted and maintained in an extended state by an elastic structure in the absence of external force. At this time, the auxiliary switch A22 is in a closed state (the state of the auxiliary switch when there is no external force on the retractable trigger rod can be configured according to actual needs, and this is just an example). The retractable trigger rod TRGX22 will interfere with the linkage structure L in space when it is in an extended state. When the motor M drives the moving contact DC and the linkage structure L to move to the first set position P1, the retractable trigger rod TRGX22 will be compressed, and the retractable trigger rod TRGX22 will change from an extended state to a compressed state, and the state of the auxiliary switch A22 will change from closed to open.

[0063] When the moving contact DC moves away from the stationary contacts SC1 and SC2 (the switching device is disconnected) to the first set position P1, X21 is triggered first and then X22 is triggered.

[0064] The micro switch Y21 includes a retractable trigger rod TRGY21 and an auxiliary switch B21. The retractable trigger rod TRGY21 can be retracted and maintained in an extended state by an elastic structure in the absence of external force. At this time, the auxiliary switch B21 is disconnected (the state of the auxiliary switch when there is no external force on the retractable trigger rod can be configured according to actual needs, and this is just an example). The retractable trigger rod TRGY21 will interfere with the linkage structure L in space when it is in the extended state. When the motor M drives the moving contact DC and the linkage structure L to move to the second set position P2, the retractable trigger rod TRGY21 will be compressed, and the retractable trigger rod TRGY21 will change from the extended state to the compressed state, and the state of the auxiliary switch B21 will change from the open state to the closed state.

[0065] The micro switch Y22 includes a retractable trigger rod TRGY22 and an auxiliary switch B22. The retractable trigger rod TRGY22 can be retracted and maintained in an extended state by an elastic structure in the absence of external force. At this time, the auxiliary switch B22 is in a closed state (the state of the auxiliary switch when there is no external force on the retractable trigger rod can be configured according to actual needs, and this is just an example). The retractable trigger rod TRGY22 will interfere with the linkage structure L in space when it is in an extended state. When the motor M drives the moving contact DC and the linkage structure L to move to the second set position P2, the retractable trigger rod TRGY22 will be compressed, and the retractable trigger rod TRGY22 will change from an extended state to a compressed state, and the state of the auxiliary switch B22 will change from closed to open.

[0066] When the moving contact DC moves close to the stationary contacts SC1 and SC2 (the switching device is closed) to the second set position P2, Y21 is triggered first and then Y22 is triggered.

[0067] It is worth noting that the retractable trigger rods of each micro switch included in a micro switch are arranged side by side on the moving path of the moving contact linkage structure of the switch device when in the extended state. During the movement of the moving contact linkage structure of the switch device, each retractable trigger rod is compressed in turn, and the retractable trigger rod triggers the control end of the corresponding auxiliary switch during the compression process.

[0068] One end of the auxiliary switch A21 is connected to the feedback signal input terminal SA21 of the signal processing device SPU, and is also connected to the power common terminal COM of the signal processing device SPU through the resistor RA21, and the other end is connected to the power terminal VCC of the signal processing device SPU. The feedback signal SA21 is used to detect whether the moving contact DC is in the first set position P1.

[0069] One end of the auxiliary switch A22 is connected to the feedback signal input terminal SA22 of the signal processing device SPU, and is also connected to the power common terminal COM of the signal processing device SPU through the resistor RA22, and the other end is connected to the power terminal VCC of the signal processing device SPU. The feedback signal SA22 is used to control the DC motion state of the moving contact during the disconnection process.

[0070] One end of the auxiliary switch B21 is connected to the feedback signal input terminal SB21 of the signal processing device SPU, and is also connected to the power common terminal COM of the signal processing device SPU through the resistor RB21, and the other end is connected to the power terminal VCC of the signal processing device SPU. The feedback signal SB21 is used to detect whether the moving contact DC is in the second set position P2.

[0071] One end of the auxiliary switch B22 is connected to the feedback signal input terminal SB22 of the signal processing device SPU, and is also connected to the power common terminal COM of the signal processing device SPU through the resistor RB22, and the other end is connected to the power terminal VCC of the signal processing device SPU. The feedback signal SB22 is used to control the DC motion state of the moving contact during the closing process.

[0072] Design description of two feedback signals during the SW disconnection process of the switching device.

[0073] The control system CTRU receives the disconnection instruction of the switch device SW from the upper system SPVR, and the signal processing device SPU detects the feedback signals SA21 and SA22. If SA21 is at a high level and SA22 is at a low level, it is considered that the switch device SW is already in the disconnected state, and the moving contact DC is directly controlled to stop moving; otherwise, the motor control device MDR controls the motor M to reverse, and the moving contact DC moves away from the static contacts SC1 and SC2 until the linkage structure L first compresses the retractable trigger rod TRGX21 of the micro-switch X21 at the first set position P1, and the state of the auxiliary switch A21 changes from disconnected to closed. The feedback signal SA21 changes from low level to high level, and the signal processing device SPU receives that the moving contact DC of the switch device SW is in the first set position P1. At this time, the motor M continues to reverse, and the moving contact DC continues to move away from the static contacts SC1 and SC2; then the linkage structure L compresses the retractable trigger rod TRGX22 of the micro-switch X22 at the first set position P1, and the state of the auxiliary switch A22 changes from closed to open, and the feedback signal SA22 changes from high level to low level. The signal processing device SPU updates the moving contact DC movement state to stop, and the motor control device MDR controls the motor M to stop, and the moving contact DC stops. Both feedback signals are complete and valid, and the operation of disconnecting the switch device SW is completed.

[0074] Design description of two feedback signals during the closing process of the switching device SW.

[0075] The control system CTRU receives the closing instruction of the switch device SW from the upper system SPVR, and the signal processing device SPU detects the feedback signals SB21 and SB22. If SB21 is at a high level and SB22 is at a low level, it is considered that the switch device SW is already in the closed state, and the moving contact DC is directly controlled to stop; otherwise, the motor control device MDR controls the motor M to rotate forward, and the moving contact DC moves close to the static contacts SC1 and SC2 until the linkage structure L first compresses the retractable trigger rod TRGY21 of the micro switch Y21 at the second set position P2, and the state of the auxiliary switch B21 changes from open to closed. The feedback signal SB21 changes from low level to high level, and the signal processing device SPU receives that the moving contact DC of the switch device SW is in the second set position P2. At this time, the motor M continues to rotate forward, and the moving contact DC continues to move close to the static contacts SC1 and SC2; then the linkage structure L compresses the retractable trigger rod TRGY22 of the micro-switch Y22 at the second set position P2, and the state of the auxiliary switch B22 changes from closed to open, and the feedback signal SB22 changes from high level to low level. The signal processing device SPU updates the moving contact DC movement state to stop, and the motor control device MDR controls the motor M to stop, and the moving contact DC stops. Both feedback signals are complete and valid, and the closing operation of the switch device SW is completed.

[0076] Figure 4 FIG. 3 shows a third specific structure of a control system based on multi-path feedback signals of a switching device according to an embodiment of the present invention. Figure 4 As shown, the structure of the switch device SW is Figure 2 The structure of the switch devices SW shown is the same and will not be described in detail here.

[0077] The control system CTRU includes: micro switches X3 and Y3, relays Q31 and Q32, a signal processing device SPU and a motor control device MDR. The micro switch X3 is set at the first setting position P1, and the micro switch Y3 is set at the second setting position P2.

[0078] The micro switch X3 includes a retractable trigger rod TRG31 and two auxiliary switches A31 and B31. The retractable trigger rod TRG31 can be retracted and maintained in an extended state by an elastic structure in the absence of external force. At this time, the auxiliary switch A31 is in an open state, and the auxiliary switch B31 is in an open state (the state of the auxiliary switch when there is no external force on the retractable trigger rod can be configured according to actual needs, and this is just an example). The retractable trigger rod TRG31 will interfere with the linkage structure L in space when it is in an extended state. The retractable trigger rod is located on the moving path of the linkage structure of the moving contact of the switch device when it is in an extended state, and the control end of each auxiliary switch is triggered in sequence during the compression process. When the motor M drives the moving contact DC and the linkage structure L to move to the first set position P1, the retractable trigger rod TRG31 will be compressed. When the retractable trigger rod TRG31 changes from an extended state to a compressed state, the auxiliary switch A31 changes from an open state to a closed state first, and then the auxiliary switch B31 changes from an open state to a closed state, and the order is fixed.

[0079] The micro switch Y3 includes a retractable trigger rod TRG32 and two auxiliary switches A32 and B32. The retractable trigger rod TRG32 can be retracted and maintained in an extended state by an elastic structure in the absence of external force. At this time, the auxiliary switch A32 is disconnected and the auxiliary switch B32 is disconnected (the state of the auxiliary switch when there is no external force on the retractable trigger rod can be configured according to actual needs, which is just an example here). The retractable trigger rod TRG32 will interfere with the linkage structure L in space when it is in the extended state. The retractable trigger rod is located on the moving path of the linkage structure of the switch device moving contact when it is in the extended state, and the control end of each auxiliary switch is triggered in sequence during the compression process. When the motor M drives the moving contact DC and the linkage structure L to move to the second set position P2, the retractable trigger rod TRG32 will be compressed. When the retractable trigger rod TRG32 changes from the extended state to the compressed state, the auxiliary switch A32 changes from open to closed first, and then the auxiliary switch B32 changes from open to closed, and the order is fixed.

[0080] One end of the auxiliary switch A31 is connected to the feedback signal input terminal SA31 of the signal processing device SPU, and is also connected to the power common terminal COM of the signal processing device SPU through the resistor RA31, and the other end is connected to the power terminal VCC of the signal processing device SPU. The feedback signal SA31 is used to detect whether the moving contact DC is in the first set position P1.

[0081] One end of the auxiliary switch B31 is connected to one end of the control coil CL1 of the relay Q31, and the other end is connected to the power supply terminal VCC of the signal processing device SPU. The other end of the control coil CL1 of the relay Q31 is connected to the power supply common terminal COM of the signal processing device SPU. One end of the contact C31 of the relay Q31 is connected to the feedback signal input terminal SC31 of the signal processing device SPU, and is also connected to the power supply common terminal COM of the signal processing device SPU through the resistor RC31, and the other end is connected to the power supply terminal VCC of the signal processing device SPU. When the auxiliary switch B31 is disconnected, the control coil CL1 of the relay Q31 loses power and the contact C31 is closed. When the auxiliary switch B31 is closed, the control coil CL1 of the relay Q31 is energized and the contact C31 is disconnected. The feedback signal SC31 is used to control the DC motion state of the moving contact during the disconnection process.

[0082] One end of the auxiliary switch A32 is connected to the feedback signal input terminal SA32 of the signal processing device SPU, and is also connected to the power common terminal COM of the signal processing device SPU through the resistor RA32, and the other end is connected to the power terminal VCC of the signal processing device SPU. The feedback signal SA32 is used to detect whether the moving contact DC is in the second set position P2.

[0083] One end of the auxiliary switch B32 is connected to one end of the control coil CL2 of the relay Q32, and the other end is connected to the power supply terminal VCC of the signal processing device SPU. The other end of the control coil CL2 of the relay Q32 is connected to the power supply common terminal COM of the signal processing device SPU. One end of the contact C32 of the relay Q32 is connected to the feedback signal input terminal SC32 of the signal processing device SPU, and is also connected to the power supply common terminal COM of the signal processing device SPU through the resistor RC32, and the other end is connected to the power supply terminal VCC of the signal processing device SPU. When the auxiliary switch B32 is disconnected, the control coil CL2 of the relay Q32 loses power, and the contact C32 is closed. When the auxiliary switch B32 is closed, the control coil CL2 of the relay Q32 is energized, and the contact C32 is disconnected. The feedback signal SC32 is used to control the DC motion state of the moving contact during the closing process.

[0084] Design description of two feedback signals during the SW disconnection process of the switching device.

[0085] The control system CTRU receives the disconnection instruction of the switch device SW from the upper system SPVR, and the signal processing device SPU detects the feedback signals SA31 and SC31. If SA31 is at a high level and SC31 is at a low level, it is considered that the switch device SW is already in the disconnected state, and the moving contact DC is directly controlled to stop moving; otherwise, the motor control device MDR controls the motor M to reverse, and the moving contact DC moves away from the static contacts SC1 and SC2 until the linkage structure L compresses the retractable trigger rod TRG31 of the micro switch X3 at the first set position P1. First, the state of the auxiliary switch A31 changes from The state of the switch SW is changed from open to closed, the feedback signal SA31 changes from low level to high level, and the signal processing device SPU receives that the moving contact DC of the switch device SW is in the first set position P1. At this time, the motor M continues to reverse, and the moving contact DC continues to move away from the static contacts SC1 and SC2; then the state of the auxiliary switch B31 changes from open to closed, the control coil CL1 of the relay Q31 is energized, the contact C31 is open, the feedback signal SC31 changes from high level to low level, the signal processing device SPU updates the moving contact DC movement state to stop, the motor control device MDR controls the motor M to stop, and the moving contact DC stops. Both feedback signals are complete and valid, and the operation of disconnecting the switch device SW is completed.

[0086] Design description of two feedback signals during the closing process of the switching device SW.

[0087] The control system CTRU receives the closing instruction of the switch device SW from the upper system SPVR, and the signal processing device SPU detects the feedback signals SA32 and SC32. If SA32 is high and SC32 is low, it is considered that the switch device SW is already in the closed state, and the moving contact DC is directly controlled to stop; otherwise, the motor control device MDR controls the motor M to rotate forward, and the moving contact DC moves close to the static contacts SC1 and SC2 until the linkage structure L compresses the retractable trigger rod TRG32 of the micro switch Y3 at the second set position P2. First, the state of the auxiliary switch A32 changes from The state of the switch SW changes from open to closed, the feedback signal SA32 changes from low level to high level, and the signal processing device SPU receives that the moving contact DC of the switch device SW is in the second set position P2. At this time, the motor M continues to rotate forward, and the moving contact DC continues to move close to the static contacts SC1 and SC2; then the state of the auxiliary switch B32 changes from open to closed, the control coil CL2 of the relay Q32 is energized, the contact C32 is open, and the feedback signal SC32 changes from high level to low level. The signal processing device SPU updates the moving contact DC movement state to stop, and the motor control device MDR controls the motor M to stop, and the moving contact DC stops. Both feedback signals are complete and valid, and the operation of closing the switch device SW is completed.

[0088] Among them, by setting up relays, functions such as signal inversion and signal strength adjustment can be realized, which increases the flexibility and stability of the control system.

[0089] In addition, in the control system provided by the embodiment of the present invention, the state of multiple micro switches can be directly triggered to change when the moving contact of the switch device moves to the set position, and the control system directly selects the feedback signal that changes last in the multiple feedback signals to control the movement state of the moving contact of the switch device. It can also be: the state of multiple micro switches is directly triggered to change when the moving contact of the switch device moves to the set position, and the micro switch that changes last controls other contacts to indirectly generate other feedback signals, and the control system selects the indirectly generated feedback signal to control the movement state of the moving contact of the switch device. That is: the feedback signal whose state changes first is used for other purposes, and the feedback signal whose state changes last is used directly or indirectly to control the movement state of the moving contact of the switch device, so as to improve the complete effectiveness of all feedback signals of the switch device and improve the stability of the system.

[0090] Figure 5 FIG. 4 shows a fourth specific structure of a control system based on a multi-path feedback signal of a switching device according to an embodiment of the present invention. Figure 5 As shown, the structure of the switch device SW is Figure 3 The structure of the switch devices SW shown is the same and will not be described in detail here.

[0091] The control system CTRU includes: two micro switches, a signal processing unit SPU and a double-pole double-throw switch DP, one of which is set at the setting position P1 and consists of micro switches X21 and X22; the other micro switch is set at the setting position P2 and consists of micro switches Y21 and Y22. The characteristics of the micro switch are the same as those of the second specific structure, and will not be repeated here.

[0092] When the switch device SW needs to be disconnected, the signal processing device SPU controls the moving contacts d21 and d22 of the double-pole double-throw switch DP to be connected to the first group of stationary contacts d11 and d12. When the switch device SW needs to be closed, the signal processing device SPU selects the moving contacts d21 and d22 of the double-pole double-throw switch DP to be connected to the second group of stationary contacts d31 and d32. The moving contacts d21 and d22 of the double-pole double-throw switch DP must be connected to the first group of stationary contacts d11 and d12 or the second group of stationary contacts d31 and d32. The moving contacts d21 and d22 of the double-pole double-throw switch DP are also connected to the power ports n and p of the motor M. The first group of static contacts d11 is connected to the power supply VCC, the first group of static contacts d12 is connected to one end of the auxiliary switch A22, the other end of the auxiliary switch A22 is connected to the power common terminal COM, the second group of static contacts d32 is connected to the power supply VCC, the second group of static contacts d31 is connected to one end of the auxiliary switch B22, and the other end of the auxiliary switch B22 is connected to the power common terminal COM.

[0093] The signal processing unit SPU is responsible for controlling the connection between the moving contacts d21 and d22 of the double-pole double-throw switch DP and the first group of stationary contacts d11 and d12 or the second group of stationary contacts d31 and d32, and does not control the on and off of the power supply of the motor M. The on and off of the power supply of the motor M is controlled by the corresponding auxiliary switch.

[0094] Design description of the operation of motor M and feedback signal during the disconnection process of switching device SW.

[0095] The control system CTRU receives the disconnection instruction of the switch device SW from the upper system SPVR, and the signal processing device SPU controls the moving contacts d21 and d22 of the double-pole double-throw switch DP to connect with the first group of static contacts d11 and d12. The power forms a loop through the double-pole double-throw switch DP, the motor M and the auxiliary switch A22. At this time, the power supply to the motor M is negative. The signal processing device SPU detects the feedback signal SA21 at the same time. If the auxiliary switch A22 is in the open state, the power supply circuit of the motor M is disconnected by the auxiliary switch A22, and the motor M stops; otherwise, the closed auxiliary switch A22 applies a negative polarity power supply to the motor M, the motor M reverses, and the moving contact DC moves away from the static contacts SC1 and SC2, until the linkage structure L first compresses the retractable trigger rod TRGX21 of the micro-switch X21 at the first setting position P1, the state of the auxiliary switch A21 changes from open to closed, the feedback signal SA21 changes from low level to high level, and the signal processing device SPU receives that the moving contact DC of the switch device SW is in the first setting position P1, at which time the motor M continues to reverse, and the moving contact DC continues to move away from the static contacts SC1 and SC2; then the linkage structure L compresses the retractable trigger rod TRGX22 of the micro-switch X22 at the first setting position P1, the state of the auxiliary switch A22 changes from closed to open, the power supply circuit of the motor M is disconnected by the auxiliary switch A22, and the motor M stops. The control of the motor M is completed, the feedback signal SA21 is complete and effective, and the operation of disconnecting the switch device SW is completed.

[0096] Design description of the operation of motor M and feedback signal during the closing process of switching device SW.

[0097] The control system CTRU receives the closing command of the switch device SW from the upper system SPVR, and the signal processing device SPU controls the moving contacts d21 and d22 of the double-pole double-throw switch DP to connect with the second group of static contacts d31 and d32. The power forms a loop through the double-pole double-throw switch DP, the motor M and the auxiliary switch B22. At this time, the power supply to the motor M is positive. The signal processing device SPU detects the feedback signal SB21 at the same time. If the auxiliary switch B22 is in the open state, the power supply circuit of the motor M is disconnected by the auxiliary switch B22, and the motor M stops; otherwise, the closed auxiliary switch B22 applies positive polarity power to the motor M, the motor M rotates forward, and the moving contact DC moves close to the static contacts SC1 and SC2, until the linkage structure L first compresses the retractable trigger rod TRGY21 of the micro-switch Y21 at the second setting position P2, the state of the auxiliary switch B21 changes from open to closed, the feedback signal SB21 changes from low level to high level, and the signal processing device SPU receives that the moving contact DC of the switch device SW is in the second setting position P2, at which time the motor M continues to rotate forward, and the moving contact DC continues to move close to the static contacts SC1 and SC2; then the linkage structure L compresses the retractable trigger rod TRGY22 of the micro-switch Y22 at the second setting position P2, the state of the auxiliary switch B22 changes from closed to open, the power supply circuit of the motor M is disconnected by the auxiliary switch B22, and the motor M stops. The control of the motor M is completed, the feedback signal SB21 is complete and effective, and the operation of closing the switch device SW is completed.

[0098] In an alternative embodiment, see Figure 6 , the retractable trigger rod comprises: a trigger head G1, a retractable structure G2 connected to the trigger head and a trigger rod G3;

[0099] The trigger head G1 is arranged on the moving path of the movable contact linkage structure of the switch device.

[0100] In addition, the telescopic structure can be realized by using a spring.

[0101] The present invention uses specific embodiments to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

[0102] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, commodity or device including the elements.

[0103] Each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0104] The above is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A control system based on multi-path feedback signals of a switching device, characterized in that: It includes: a micro switch, a signal processing device connected to an external system and the micro switch, and a motor control device connected to the signal processing device; the signal processing device is integrated with the motor control device, and the micro switch serves as a part of the motor control loop; The micro switch is used to sense the position of the moving contact of the switch device to generate multiple feedback signals; The signal processing device receives a control signal from an external system and the multiple feedback signals, and generates a motor control instruction for the switching device according to a feedback signal received last among the multiple feedback signals and the control signal; The motor control device controls the motor of the switch device according to the motor control instruction, and the motor controls the closing and opening of the main contacts of the switch device.

2. The control system based on multi-path feedback signals of switching devices according to claim 1, characterized in that: The micro switch comprises: a retractable trigger rod and at least two auxiliary switches; The retractable trigger rod is located on the moving path of the moving contact linkage structure of the switch device when in the extended state, and triggers the control ends of the auxiliary switches in sequence during the compression process.

3. The control system based on multi-path feedback signals of switching devices according to claim 2, characterized in that: The first end of the auxiliary switch is connected to the power supply end of the signal processing device, the second end is connected to a feedback signal input end of the signal processing device, and the second end is also connected to the power supply common end of the signal processing device through a load loop.

4. The control system based on multi-path feedback signals of switching devices according to claim 2, characterized in that: Also includes: Relay; A first end of one of the auxiliary switches is connected to a power supply end of the signal processing device, a second end is connected to a feedback signal input end of the signal processing device, and the second end is also connected to a power supply common end of the signal processing device through a load loop; A first end of another auxiliary switch is connected to the power supply end of the signal processing device, and a second end is connected to the power supply common end of the signal processing device through a control coil of a relay. One end of the contact of the relay is connected to the power supply end of the signal processing device, and the other end is connected to a feedback signal input end of the signal processing device. In addition, the other end of the contact of the relay is also connected to the power supply common end of the signal processing device through a load circuit.

5. The control system based on multi-path feedback signals of switching devices according to claim 1, characterized in that: The micro switch comprises: at least two retractable trigger rods and at least two auxiliary switches corresponding to the retractable trigger rods one by one; The at least two retractable trigger rods are arranged side by side on the moving path of the moving contact linkage structure of the switch device when in an extended state. The moving contact linkage structure of the switch device compresses each retractable trigger rod in turn during the movement of the retractable trigger rod, and the retractable trigger rod triggers the control end of the corresponding auxiliary switch during the compression process.

6. The control system based on multi-path feedback signals of switching devices according to claim 5, characterized in that: The first end of the auxiliary switch is connected to the power supply end of the signal processing device, the second end is connected to a feedback signal input end of the signal processing device, and the second end is also connected to the power supply common end of the signal processing device through a load loop.

7. The control system based on multi-path feedback signals of a switching device according to any one of claims 2 to 6, characterized in that: The retractable trigger rod comprises: a trigger head, a retractable structure connected to the trigger head and a trigger rod; The trigger head is arranged on the moving path of the movable contact linkage structure of the switch device.

8. The control system based on multi-path feedback signals of a switching device according to any one of claims 1 to 6, characterized in that: There are at least two micro switches, at least one micro switch is arranged at the moving contact linkage structure position when the switch device is in the disconnected state, and is used to sense the disconnected state of the switch device, and at least one micro switch is arranged at the moving contact linkage structure position when the switch device is in the closed state, and is used to sense the closed state of the switch device.

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