CN213750189U - Shield door system safety circuit fault diagnosis circuit and shield door system - Google Patents
Shield door system safety circuit fault diagnosis circuit and shield door system Download PDFInfo
- Publication number
- CN213750189U CN213750189U CN202022408101.6U CN202022408101U CN213750189U CN 213750189 U CN213750189 U CN 213750189U CN 202022408101 U CN202022408101 U CN 202022408101U CN 213750189 U CN213750189 U CN 213750189U
- Authority
- CN
- China
- Prior art keywords
- relay
- safety loop
- safety
- door system
- circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Power-Operated Mechanisms For Wings (AREA)
Abstract
The utility model provides a shield door system safety loop fault diagnosis circuit and a shield door system, in the shield door system safety loop fault diagnosis circuit and the shield door system provided by the utility model, a shield door system safety loop fault diagnosis sub-circuit is respectively arranged aiming at each safety loop relay in a shield door system safety loop, the front end wiring harness state of the safety loop relay is detected by a relay front end wiring harness detection unit, the switching state of the safety loop relay is detected by a relay switching state detection unit, the front end wiring harness states of a plurality of safety loop relays and the switching state of the safety loop relay can be detected and monitored in real time, the specific reason of the safety loop fault can be found in time by a detection signal, namely the front end wiring harness of the safety loop relay is disconnected or the safety loop relay is not closed, the specific position of the safety loop fault can be positioned in time by the detection signal, maintenance and troubleshooting time is greatly reduced.
Description
Technical Field
The utility model relates to an automatic technical field especially relates to a shield door system safety circuit fault diagnosis circuit and shield door system.
Background
The subway shield door system is a necessary facility of modern subway engineering, and a safety loop is added in the subway track in order to ensure the running safety of a train during design. The safety circuit of the shield door system is a ring circuit formed by a safety circuit relay in a control unit (DCU) of each sliding door and a PSC safety relay coil in series design, when all doors are closed and locked, all the sliding Door Control Units (DCUs) close the safety circuit relays, the logic relation value is 1, the logic relation value is transmitted to a PSC (central interface control panel), the PSC safety relays are triggered to be conducted, the logic relation value is 1, the command is transmitted to a signal system through a hard wire control cable, the signal system transmits the command to a train, the train can be safely dispatched only after receiving the command, otherwise, the train can be immediately braked to carry out fault troubleshooting, the train can run after the fault troubleshooting, the current train is influenced, and the follow-up trains can be delayed.
Therefore, the safety loop is an important component link for ensuring the safe operation of the screen door system, and the quick and intelligent fault diagnosis of the safety loop directly provides convenience for the operation of the subway rail; however, the current safety circuit fault diagnosis positioning can only detect whether a safety circuit relay of the current control unit is closed or not, and the disconnection of a connecting line between the control units cannot position the safety circuit relay, and the fault diagnosis efficiency is low because the fault diagnosis is manually checked.
SUMMERY OF THE UTILITY MODEL
In view of the above-mentioned shortcomings of the prior art, an object of the present invention is to provide a detection solution for a safety loop of a shield door system, which is used to solve the above technical problems.
For realize above-mentioned purpose and other relevant mesh, the utility model provides a shield door system safety circuit failure diagnosis circuit, shield door system safety circuit includes a plurality of safety circuit relays that establish ties in proper order, shield door system safety circuit failure diagnosis circuit includes a plurality of shield door system safety circuit failure diagnosis subcircuits, and is a plurality of shield door system safety circuit failure diagnosis subcircuits and a plurality of safety circuit relay one-to-one is connected, shield door system safety circuit failure diagnosis subcircuit includes:
the relay front end wire harness detection unit is connected with the safety loop relay, detects the front end wire harness state of the safety loop relay and outputs a first detection signal;
and the relay switching state detection unit is connected with the safety loop relay, detects the switching state of the safety loop relay and outputs a second detection signal.
Optionally, the screen door system includes a plurality of gate control units, each gate control unit includes one respectively the safety circuit relay, the safety circuit relay has first pair of contacts, first pair of contacts includes first normally open point, first common point and first normally closed point, and is a plurality of the safety circuit relay is established ties in proper order, and the latter the first normally open point of safety circuit relay connects the former the first common point of safety circuit relay, and is first the first normally open point of safety circuit relay connects operating voltage, and the last the first common point of safety circuit relay ground connection.
Optionally, relay front end pencil detecting element includes first resistance, second resistance and first opto-coupler, the first normal open point of safety circuit relay is through establishing ties in proper order first resistance with ground connection behind the second resistance, the input anodal of first opto-coupler connect first resistance with the common port of second resistance, the input negative pole ground connection of first opto-coupler, the anodal output of the output of first opto-coupler first detected signal, the output negative pole ground connection of first opto-coupler.
Optionally, the relay front end harness detection unit further includes a first capacitor, and the first capacitor is connected in parallel with the second resistor.
Optionally, the safety circuit relay further has a second pair of contacts including a second normally open point, a second common point, and a second normally closed point.
Optionally, the relay on-off state detection unit includes a second optocoupler and a third resistor, an input positive electrode of the second optocoupler is connected in series with the third resistor and then connected to the working voltage, an input negative electrode of the second optocoupler is connected to a second normally-on point of the safety circuit relay, a second common point of the safety circuit relay is grounded, an output positive electrode of the second optocoupler outputs the second detection signal, and an output negative electrode of the second optocoupler is grounded.
Optionally, the shielding door system safety loop fault diagnosis circuit further includes a processing unit, and the processing unit receives the first detection signal and the second detection signal, determines the state of the shielding door system safety loop, and outputs corresponding state information.
In addition, for realizing above-mentioned purpose and other relevant purposes, the utility model also provides a shield door system, including host computer and a plurality of gate unit, every the gate unit includes a safety circuit relay respectively, and is a plurality of the safety circuit relay is established ties in proper order, shield door system still includes above-mentioned shield door system safety circuit failure diagnosis circuit, the host computer is received status information.
Optionally, the safety circuit relay has a first pair of contacts, the first pair of contacts includes a first normally open point, a first common point and a first normally closed point, the plurality of safety circuit relays are sequentially connected in series, the first normally open point of the latter safety circuit relay is connected to the first common point of the former safety circuit relay, the first normally open point of the first safety circuit relay is connected to the working voltage, and the first common point of the last safety circuit relay is grounded; the positive pole of the coil of the safety loop relay is connected with the working voltage, and the negative pole of the coil of the safety loop relay is grounded.
Optionally, each gate control unit further includes a freewheeling diode, and in each gate control unit, an anode of the freewheeling diode is connected to a negative electrode of the coil of the safety circuit relay, and a cathode of the freewheeling diode is connected to a positive electrode of the coil of the safety circuit relay.
As described above, the utility model discloses a shield door system safety circuit fault diagnosis circuit has following beneficial effect:
the safety loop fault diagnosis sub-circuit of the screen door system is correspondingly arranged for each safety loop relay in a safety loop of the screen door system to detect, the front end wire harness state of the safety loop relay is detected through the relay front end wire harness detection unit, the opening and closing state of the safety loop relay is detected through the relay opening and closing state detection unit, so that the front end wire harness states of a plurality of safety loop relays and the opening and closing state of the safety loop relay can be detected and monitored in real time, specific reasons or types of safety loop faults can be found in time, specific positions of the safety loop faults can be located, and maintenance and troubleshooting time is greatly reduced.
Drawings
Fig. 1 shows a circuit diagram of a screen door system safety circuit.
Fig. 2 is a circuit diagram of an embodiment of the present invention, which illustrates a safety loop fault diagnosis sub-circuit of a shielded door system.
Fig. 3 is a circuit diagram of the front end harness detecting unit of the relay in fig. 2.
Fig. 4 is a circuit diagram of the relay open/close state detecting unit of fig. 2.
Description of the reference numerals
C1-first capacitor, D1-D24-freewheeling diode, DCU 1-DCU 24-gate control unit, R1-first resistor, R2-second resistor, R3-third resistor, U1-first opto-coupler, U2-second opto-coupler, VCC-operating voltage, GND-ground, 1-coil positive electrode of safety circuit relay, 16-coil negative electrode of safety circuit relay, 13-first common point of safety circuit relay, 11-first normally closed point of safety circuit relay, 9-first normally open point of safety circuit relay, 4-second common point of safety circuit relay, 6-second normally closed point of safety circuit relay, 8-second normally open point of safety circuit relay, L0-L23-harness terminal, RelayA-first detection signal, RelayB-second detection signal, 21-first input terminal of U1, 22-first input terminal of opto-U1-first input terminal of U38 1-output terminal of U-opto-coupler, 24-the positive pole of the output end of the first optical coupler U1, 31-the positive pole of the input end of the second optical coupler U2, 32-the negative pole of the input end of the second optical coupler U2, 33-the negative pole of the output end of the second optical coupler U2, and 34-the positive pole of the output end of the second optical coupler U2.
Detailed Description
As mentioned in the background, as shown in fig. 1, the safety loop of the screen door system is a loop circuit formed by serially connecting the safety loop relay and the PSC safety relay coil in the gate control unit (DCU 1-DCU 24) of each sliding door, and the current safety loop fault diagnosis positioning can only detect whether the safety loop relay of the current gate control unit DCU is closed, but cannot position when the connection line between the gate control units DCU is opened, or can be manually checked, so that the fault diagnosis efficiency is low.
Based on this, the utility model provides a shield door system safety circuit fault diagnosis scheme to every safety circuit relay in the shield door system safety circuit, corresponds to be provided with shield door system safety circuit fault diagnosis sub-circuit and detects: firstly, the front-end wiring harness state of the safety circuit relay is detected through the relay front-end wiring harness detection unit, and secondly, the opening and closing state of the safety circuit relay is detected through the relay opening and closing state detection unit, so that the connection state of the front-end wiring harness in each gate control unit and the opening and closing state of the safety circuit relay are detected in real time.
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein. The present invention can also be implemented or applied through other different specific embodiments, and various details in the present specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention.
Please refer to fig. 1-4. It should be noted that the drawings provided in the present embodiment are only schematic and illustrative of the basic idea of the present invention, and only the electronic components related to the present invention are shown in the drawings rather than being drawn according to the types, numbers and layout of the components in actual implementation. The structural form, quantity and layout of the electronic components shown in the drawings attached to the present specification are only used to cooperate with the content disclosed in the specification, so that those skilled in the art can understand and read the electronic components, and the electronic components are not limited to the limit conditions that can be implemented by the present invention, so that the electronic components do not have technical essential meaning, and any modification or simple increase and decrease of the structural electronic components should still fall within the scope that can be covered by the technical content disclosed in the present invention without affecting the function that the present invention can produce and the purpose that can be achieved. Meanwhile, the terms "first" and "second" used in the present specification are for clarity of description, and are not used to limit the scope of the present invention, and the relative relationship between the terms may be changed or adjusted without substantial technical changes.
In detail, as shown in fig. 1, the screen door system of the subway track includes a plurality of gate control units (DCU 1-DCU 24), each gate control unit (DCU 1-DCU 24) includes a safety circuit relay, and the plurality of safety circuit relays are sequentially connected in series and then connected in series with a PSC safety relay coil to form a loop, which is a safety circuit of the screen door system. When all the safety loop relays are completely closed, the signal is transmitted back, the PSC safety relay is closed, and the safety loop signal is sent out.
In more detail, as shown in fig. 1, the safety circuit relay has a first pair of contacts including a first normally-open point 9, a first common point 13 and a first normally-closed point 11, the plurality of safety circuit relays are connected in series in sequence, the first normally-open point 9 of the latter safety circuit relay is connected to the first common point 13 of the former safety circuit relay (the first normally-open point 9 of the second safety circuit relay is connected to the first common point 13 of the first safety circuit relay via a harness terminal L1, the first normally-open point 9 of the third safety circuit relay is connected to the first common point 13 of the second safety circuit relay via a harness terminal L2, and so on …, the first normally-open point 9 of the last safety circuit relay is connected to the first common point 13 of the next to last safety circuit relay via a harness terminal L23), the first normally-open point 9 of the first safety circuit relay is connected to the operating voltage VCC via a harness terminal L0, the first common point 13 of the last safety loop relay is grounded GND; meanwhile, the positive pole 1 of the coil of the safety loop relay is connected with the working voltage VCC, and the negative pole 16 of the coil of the safety loop relay is grounded GND.
More specifically, as shown in fig. 1, each gate control unit (DCU1 to DCU24) further includes a freewheeling diode, and in each gate control unit DCUi (i is an integer of 1 to 24), an anode of the freewheeling diode Di is connected to the negative coil electrode 16 of the safety circuit relay, and a cathode of the freewheeling diode Di is connected to the positive coil electrode 1 of the safety circuit relay: the gate control unit DCU1 comprises a freewheeling diode D1, in the gate control unit DCU1, the anode of the freewheeling diode D1 is connected with the coil cathode 16 of the safety loop relay, and the cathode of the freewheeling diode D1 is connected with the coil anode 1 of the safety loop relay; the gate control unit DCU2 comprises a freewheeling diode D2, in the gate control unit DCU2, the anode of the freewheeling diode D2 is connected with the coil cathode 16 of the safety loop relay, and the cathode of the freewheeling diode D2 is connected with the coil anode 1 of the safety loop relay; by analogy, …; the gate control unit DCU24 includes a freewheeling diode D24, and in the gate control unit DCU24, the anode of the freewheeling diode D24 is connected to the coil cathode 16 of the safety circuit relay, and the cathode of the freewheeling diode D24 is connected to the coil anode 1 of the safety circuit relay.
In this embodiment, the utility model provides a shield door system safety circuit failure diagnosis circuit, this shield door system safety circuit failure diagnosis circuit include a plurality of independent shield door system safety circuit failure diagnosis sub-circuits, and a plurality of shield door system safety circuit failure diagnosis sub-circuits are connected with a plurality of safety circuit relay one-to-one in the shield door system safety circuit, as shown in fig. 2, shield door system safety circuit failure diagnosis sub-circuit includes:
the relay front end wire harness detection unit is connected with the safety loop relay, detects the front end wire harness state of the safety loop relay and outputs a first detection signal RelayA;
and the relay on-off state detection unit is connected with the safety loop relay, detects the on-off state of the safety loop relay and outputs a second detection signal RelayB.
Next, a specific circuit structure and an operation principle of the shielded gate system safety loop fault diagnosis sub-circuit are described in detail by taking the shielded gate system safety loop fault diagnosis sub-circuit corresponding to the gate control unit DCU1 as an example.
In detail, as shown in fig. 2 to 3, in the shielded door system safety circuit fault diagnosis sub-circuit corresponding to the door control unit DCU1, the relay front end harness detection unit includes a first resistor R1, a second resistor R2 and a first optical coupler U1, a first normally open point 9 (a terminal L0) of the safety circuit relay is grounded to GND through a first resistor R1 and a second resistor R2 which are sequentially connected in series, an input end positive electrode 21 of the first optical coupler U' is connected to a common end of the first resistor R1 and the second resistor R2, an input end negative electrode 22 of the first optical coupler U1 is grounded to GND, an output end positive electrode 23 of the first optical coupler U1 outputs a first detection signal RelayA, and an output end 23 of the first optical coupler U1 is grounded to GND.
Optionally, as shown in fig. 2 to 3, the relay front end harness detecting unit further includes a first capacitor C1, and the first capacitor C1 is connected in parallel with the second resistor R2.
In more detail, as shown in fig. 2 to 3, the relay front end harness detecting unit operates as follows: when the front end wire harness of the gate control unit DCU1 is normal (i.e., not disconnected), the wire harness terminal L0 is at high level, so that the first optocoupler U1 is turned on, and the first detection signal RelayA is pulled down to the ground GND, that is, the front end wire harness of the gate control unit DCU1 is normal when the first detection signal RelayA is at low level.
In detail, as shown in fig. 1-2, the safety circuit relay also has a second pair of contacts comprising a second normally open point 8, a second common point 4 and a second normally closed point 6.
In detail, as shown in fig. 2 and 4, in the sub circuit of the safety loop fault diagnosis of the shielded door system corresponding to the gate control unit DCU1, the relay on-off state detection unit includes a second optical coupler U2 and a third resistor R3, an input end positive electrode 31 of the second optical coupler U2 is connected to the operating voltage VCC through the serially connected third resistor R3, an input end negative electrode 32 of the second optical coupler U2 is connected to the second normally open point 8 of the safety loop relay, the second common point 4 of the safety loop relay is grounded GND, an output end positive electrode 34 of the second optical coupler U2 outputs a second detection signal RelayB, and an output end negative electrode 33 of the second optical coupler U2 is grounded GND.
More specifically, as shown in fig. 2 and 4, the relay open/close state detection means operates in the following manner: when the safety loop relay in the gate control unit DCU1 is closed, the second normally open point 8 of the safety loop relay is connected to the second common point 4, i.e. the negative pole 32 of the input terminal of the second optocoupler U2 is grounded to GND, so that the second optocoupler U2 is turned on, and the second detection signal relaayb is pulled down to the ground GND, that is, the safety loop relay in the gate control unit DCU1 is closed when the second detection signal RelayB is at a low level.
Optionally, the shield door system safety circuit fault diagnosis circuit further includes a processing unit (such as a single chip microcomputer), and the processing unit receives the first detection signal RelayA and the second detection signal RelayB, determines the state of the shield door system safety circuit accordingly, and outputs corresponding state information: if the first detection signal RelayA is at a low level, the front-end wire harness is normal, otherwise, the wire harness is abnormally disconnected; and if the second detection signal RelayB is at a low level, the safety loop relay is closed, otherwise, the safety loop relay is not closed.
Meanwhile, each safety loop relay in the safety loop of the shielded door system is respectively provided with a shielded door system safety loop fault diagnosis sub-circuit for detection, the front end wire harness states of the safety loop relays and the opening and closing states of the safety loop relays are detected and monitored in real time, the processing unit receives a first detection signal RelayA and a second detection signal RelayB corresponding to the safety loop relays, the fault reason (the front end wire harness of the safety loop relays is disconnected or the safety loop relays are not closed) can be found in time, the specific position of the fault (which one or more door control units are specific) can be positioned, and the maintenance and troubleshooting time is greatly reduced.
Furthermore, in this embodiment, the utility model provides a shield door system still, this shield door system includes host computer (not shown in the figure) and a plurality of gating unit (DCU1 ~ DCU24), every gating unit (DCUi) includes a safety circuit relay respectively, as shown in FIG. 1, a plurality of safety circuit relays establish ties in proper order, this shield door system still includes above-mentioned shield door system safety circuit failure diagnosis circuit, receive the state information of processing unit judgement back output through the host computer, can more conveniently discover the trouble and fix a position the trouble with the help of forms such as chart or document directly perceivedly, be convenient for maintain and investigation.
In summary, in the circuit for diagnosing fault of safety loop of screen door system and the screen door system provided by the present invention, each safety loop relay in the safety loop of the shielded gate system is respectively provided with a fault diagnosis sub-circuit of the safety loop of the shielded gate system, the front-end wire harness state of the safety loop relay is detected by the relay front-end wire harness detection unit, the open-close state of the safety loop relay is detected by the relay open-close state detection unit, the front-end wire harness states of a plurality of safety loop relays and the open-close state of the safety loop relay can be detected and monitored in real time, the specific reason that the fault of the safety loop can be found in time through the detection signal is that the front-end wire harness of the safety loop relay is disconnected or the safety loop relay is not closed, the specific position of the safety circuit fault can be timely positioned through the detection signal, and the maintenance and troubleshooting time is greatly reduced.
The above embodiments are merely illustrative of the principles and effects of the present invention, and are not to be construed as limiting the invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (10)
1. The utility model provides a shield door system safety circuit fault diagnosis circuit, shield door system safety circuit includes a plurality of safety circuit relays that establish ties in proper order, a serial communication port, shield door system safety circuit fault diagnosis circuit includes a plurality of shield door system safety circuit fault diagnosis subcircuits, and is a plurality of shield door system safety circuit fault diagnosis subcircuit is connected with a plurality of safety circuit relay one-to-one, shield door system safety circuit fault diagnosis subcircuit includes:
the relay front end wire harness detection unit is connected with the safety loop relay, detects the front end wire harness state of the safety loop relay and outputs a first detection signal;
and the relay switching state detection unit is connected with the safety loop relay, detects the switching state of the safety loop relay and outputs a second detection signal.
2. The barrier door system safety loop fault diagnosis circuit of claim 1, wherein the barrier door system comprises a plurality of gate control units, each gate control unit comprises one of the safety loop relays, the safety loop relay has a first pair of contacts, the first pair of contacts comprises a first normally open point, a first common point and a first normally closed point, the plurality of safety loop relays are connected in series, the first normally open point of the latter safety loop relay is connected with the first common point of the former safety loop relay, the first normally open point of the first safety loop relay is connected with an operating voltage, and the first common point of the last safety loop relay is connected with a ground.
3. The barrier door system safety loop fault diagnosis circuit of claim 2, wherein the relay front end wiring harness detection unit comprises a first resistor, a second resistor and a first optical coupler, a first normally open point of the safety loop relay is grounded after passing through the first resistor and the second resistor which are sequentially connected in series, an input end anode of the first optical coupler is connected with a common end of the first resistor and the second resistor, an input end cathode of the first optical coupler is grounded, an output end anode of the first optical coupler outputs the first detection signal, and an output end cathode of the first optical coupler is grounded.
4. The shielded door system safety loop fault diagnostic circuit of claim 3, wherein the relay front end harness detection unit further comprises a first capacitor connected in parallel with the second resistor.
5. The shielded door system safety loop fault diagnostic circuit of claim 4, wherein the safety loop relay further has a second pair of contacts comprising a second normally open point, a second common point, and a second normally closed point.
6. The barrier door system safety circuit fault diagnosis circuit according to claim 5, wherein the relay on-off state detection unit includes a second optical coupler and a third resistor, an input terminal anode of the second optical coupler is connected to the operating voltage after passing through the third resistor in series, an input terminal cathode of the second optical coupler is connected to a second normally open point of the safety circuit relay, a second common point of the safety circuit relay is grounded, an output terminal anode of the second optical coupler outputs the second detection signal, and an output terminal cathode of the second optical coupler is grounded.
7. The shielded door system safety loop fault diagnosis circuit of claim 6, further comprising a processing unit, wherein the processing unit receives the first detection signal and the second detection signal, determines the state of the shielded door system safety loop, and outputs corresponding state information.
8. A shielded gate system, comprising an upper computer and a plurality of gate control units, wherein each gate control unit comprises a safety loop relay, the safety loop relays are sequentially connected in series, the shielded gate system further comprises the shielded gate system safety loop fault diagnosis circuit of claim 7, and the upper computer receives the state information.
9. The screen door system of claim 8, wherein the safety loop relay has a first pair of contacts, the first pair of contacts including a first normally open point, a first common point, and a first normally closed point, a plurality of the safety loop relays being connected in series, the first normally open point of the latter safety loop relay being connected to the first common point of the former safety loop relay, the first normally open point of the first safety loop relay being connected to the operating voltage, and the first common point of the last safety loop relay being connected to ground; the positive pole of the coil of the safety loop relay is connected with the working voltage, and the negative pole of the coil of the safety loop relay is grounded.
10. The barrier door system of claim 9, wherein each gate control unit further comprises a freewheeling diode, wherein an anode of the freewheeling diode is connected to a negative terminal of the coil of the safety circuit relay and a cathode of the freewheeling diode is connected to a positive terminal of the coil of the safety circuit relay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022408101.6U CN213750189U (en) | 2020-10-26 | 2020-10-26 | Shield door system safety circuit fault diagnosis circuit and shield door system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022408101.6U CN213750189U (en) | 2020-10-26 | 2020-10-26 | Shield door system safety circuit fault diagnosis circuit and shield door system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213750189U true CN213750189U (en) | 2021-07-20 |
Family
ID=76852984
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022408101.6U Active CN213750189U (en) | 2020-10-26 | 2020-10-26 | Shield door system safety circuit fault diagnosis circuit and shield door system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213750189U (en) |
-
2020
- 2020-10-26 CN CN202022408101.6U patent/CN213750189U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109541457A (en) | Power battery high-voltage relay control circuit and method for diagnosing faults | |
| CN100353642C (en) | Method and device of realizing hot plug for power distribution singleboard | |
| EP4033263A1 (en) | Method for testing the relay failure of a three-phase grid-connected inverter | |
| CN105934885B (en) | Load driving circuits | |
| CN215706376U (en) | DC110V digital quantity acquisition card based on CPCI bus | |
| CN108321769B (en) | A kind of electric machine control system failure protecting device and method based on CPLD and DSP | |
| CN110987488A (en) | EMUs reconnection experiment simulation monitoring device | |
| CN109292571A (en) | A kind of synchronous and asynchronous elevator functional universal safe circuit board | |
| CN103643851A (en) | Door control unit of rail transit shielding door control system | |
| CN110336250A (en) | A kind of soft protection circuit of the hardware of IGBT multiplexing functions | |
| CN210714273U (en) | Subway shielded door monitoring devices | |
| CN213750189U (en) | Shield door system safety circuit fault diagnosis circuit and shield door system | |
| CN106532692A (en) | Static state safety analysis method and apparatus for regional power grid considering backup power automatic switching | |
| CN109995004A (en) | A kind of residual current acting tripper | |
| CN109687396B (en) | A kind of IGBT short-circuit protection circuit and its implementation | |
| CN205911734U (en) | Prevent protection device of quick earthing switch mistake combined floodgate | |
| CN114487759A (en) | Shield door system safety circuit fault diagnosis circuit and shield door system | |
| CN1192549C (en) | Method for realizing long distance controlled loopback of communication equipment | |
| CN115877200B (en) | Broken wire detecting system | |
| CN205665555U (en) | Regulator cubicle door fault indication device | |
| CN215108294U (en) | Platform door central control system | |
| CN115407175A (en) | MOSFET open circuit and short circuit detection device and method used in excitation coil control scene | |
| CN206992801U (en) | A kind of distribution power automation terminal is remotely controlled faulty action preventing circuit | |
| CN105187049B (en) | The dynamic acquisition circuit of fault-safety principle and the device of fault-safety principle | |
| CN210109608U (en) | Transformer substation's electric box cabinet door open-close state detecting system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |