CN114326369A - Safety loop circuit of platform door system - Google Patents
Safety loop circuit of platform door system Download PDFInfo
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- CN114326369A CN114326369A CN202111589885.XA CN202111589885A CN114326369A CN 114326369 A CN114326369 A CN 114326369A CN 202111589885 A CN202111589885 A CN 202111589885A CN 114326369 A CN114326369 A CN 114326369A
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Abstract
The embodiment of the application discloses a platform door system safety loop circuit, which comprises a first output end of a first solid-state relay, a second output end of the first solid-state relay, a first travel switch, a second travel switch and a DCU (direct current unit) input signal end, wherein the first output end of the first solid-state relay is connected with a safety loop signal input end; the other end of the first travel switch is connected with a DCU input signal end; the other end of the second travel switch is connected with a first input end of a second solid-state relay; and a second input end of the second solid-state relay is connected with a DCU input signal end, and a second output end of the second solid-state relay is connected with a safety circuit signal output end. The embodiment of the application can solve the problem of circuit instability and improve the stability of the safety loop circuit.
Description
Technical Field
The embodiment of the application relates to platform door system field especially relates to a platform door system safety circuit.
Background
The subway has become the main development direction of public transportation in modern cities due to the advantages of rapidness, punctuality, convenience, comfort and the like. The control of the rail platform door is a key component in the subway safety system, and is directly related to and influences the safety and reliability of the subway operation.
In the prior art, a safety loop is arranged to monitor the safety of platform doors of a subway, door closing locking switches are mounted on sliding doors, emergency doors and end doors, the door closing locking switches and necessary circuits form the safety loop, safety loop units of all door units are connected in series and return to a platform door controller to form a platform door control system closing locking safety loop.
The problem that the platform door cannot work normally due to the fact that a control circuit is unstable exists in the existing platform door safety loop design. The unstable control circuit that exists in the design of platform door safety circuit at present includes travel switch contact shake, travel switch contact asynchronous and single contact trouble lead to whole side safety circuit work unusual etc.. The contact jitter of the travel switch is that when the travel switch is not installed in place or is aged, signal jitter is easy to occur during the action of the travel switch, and once the travel switch shakes, the signal state of the whole safety circuit is unstable. When the contact of the travel switch shakes, the signal system detects the jump of the safe loop state of the platform door, the state of the platform door is judged to be unsafe, the train is not allowed to enter or exit, and the train can enter or exit only by manually operating the interlocking release equipment on the platform control panel. Moreover, the situation that the travel switch contacts are shaken is often in a flash, and the checking and the positioning are difficult. Under normal conditions, travel switch contacts are triggered synchronously, and when the travel switch is aged or is not installed in place and is located at a critical position, the contact groups of the travel switch are asynchronous. The existing design of the platform door safety loop is formed by connecting all platform door travel switch contacts in series, any group of travel switch faults such as contact damage, poor contact and the like on a main path cause the whole side safety loop to work abnormally, the sliding door safety loop is subjected to short circuit bypass after manual inspection, and the sliding door can be restored to normal work after maintenance.
Disclosure of Invention
The embodiment of the application provides a platform door system safety circuit, can solve the unstable problem of platform door safety circuit control circuit, promotes platform door safety circuit's stability.
In a first aspect, embodiments of the present application provide a platform door system safety loop circuit comprising a first solid state relay, a second solid state relay, a first travel switch and a second travel switch;
the first output end of the first solid-state relay is connected with a signal input end of a safety loop, the second output end of the first solid-state relay is connected with the first output end of the second solid-state relay, the first input end of the first solid-state relay is connected with one end of a first travel switch, and the second input end of the first solid-state relay is connected with one end of the second travel switch and a DCU input signal end;
the other end of the first travel switch is connected with a DCU input signal end;
the other end of the second travel switch is connected with a first input end of a second solid-state relay;
and a second input end of the second solid-state relay is connected with a DCU input signal end, and a second output end of the second solid-state relay is connected with a safety circuit signal output end.
Further, the circuit further comprises: the safety circuit comprises a first normally open relay, a second normally open relay, a first normally closed relay, a second normally closed relay, a third travel switch and a fourth travel switch, wherein the first normally open relay is arranged between a safety circuit signal input end and a first output end of a first solid-state relay, and the second normally open relay is arranged between a second output end of a second solid-state relay and a safety circuit signal output end;
one end of the first normally open relay is connected with the signal input end of the safety loop, and the other end of the first normally open relay is connected with the first output end of the first solid-state relay; one end of the second normally open relay is connected with the second output end of the second solid state relay, and the other end of the second normally open relay is connected with the signal output end of the safety loop;
one end of the first normally closed relay is connected with a signal input end of the safety loop, and the other end of the first normally closed relay is connected with one end of the third stroke switch;
the other end of the third travel switch is connected with one end of a fourth travel switch;
the other end of the fourth travel switch is connected with one end of a second normally closed relay;
and the other end of the second normally closed relay is connected with a signal output end of the safety circuit.
Further, the circuit further comprises: the third solid-state relay is arranged between the second output end of the second solid-state relay and the second normally-open relay;
the first input end and the second input end of the third solid-state relay are connected with the first DCU control signal end, the first output end of the third solid-state relay is connected with the second output end of the second solid-state relay, and the second output end of the third solid-state relay is connected with one end of the second normally-open relay;
and the first DCU control signal end is used for controlling the conduction of the third solid-state relay after detecting that the conduction signals of the first travel switch and the second travel switch are stable.
Further, the circuit further comprises: and the first normally-open relay and the second normally-open relay are respectively connected with a second DCU control signal end.
Further, the circuit further comprises: and the first normally closed relay and the second normally closed relay are respectively connected with a third DCU control signal end.
Further, the circuit further comprises: the safety loop signal input end is connected with the safety loop signal output end of the last platform door;
and the safety loop signal output end is connected with the safety loop signal input end of the next platform door.
Furthermore, the first travel switch is a travel switch of the sliding door, and the second travel switch is a travel switch of the emergency door.
Furthermore, the third travel switch is a travel switch of the sliding door, and the fourth travel switch is a travel switch of the emergency door.
Further, the first solid-state relay, the second solid-state relay, and the third solid-state relay are dc solid-state relays.
An embodiment of the present application further provides an electronic device, including the platform door system safety loop circuit described above.
In the embodiment of the application, the first output end of the first solid-state relay is connected with the signal input end of the safety loop, the first input end of the first solid-state relay is connected with the first travel switch connected with the signal input end of the DCU, the first travel switch is controlled to be closed through the DCU signal, so that the first output end of the first solid-state relay is conducted with the second output end of the first solid-state relay, the safety loop signal is transmitted to the first output end of the second solid-state relay through the first output end of the first solid-state relay and the second output end of the first solid-state relay, the conduction of the first solid-state relay and the input of the DCU signal are triggered and input through the contact of the first travel switch, the safety loop signal input and the DCU signal input are the same input source, and the problem that the travel switch contacts of the safety loop signal input and the DCU signal input are not synchronous is solved, thereby improving the stability of the platform door safety loop circuit. In addition, the first output end of the second solid-state relay is connected with the second output end of the first solid-state relay, the first input end is connected with the second travel switch connected with the input signal end of the DCU, so as to control the second travel switch to be closed through the DCU signal to enable the first output end of the second solid-state relay and the second output end of the second solid-state relay to be conducted, so that the safety loop signal is transmitted to the safety loop signal output end through the first output end of the second solid-state relay and the second output end of the second solid-state relay, the conduction of the second solid-state relay and the DCU signal input are triggered and input through the contact of the second travel switch, the safety loop signal input and the DCU signal input are the same input source, therefore, the problem that the travel switch contact of the safety loop signal input and the DCU signal input are not synchronous is solved, and the stability of the safety loop circuit of the platform door is improved.
Drawings
Fig. 1 is a schematic circuit diagram of a first safety circuit for a platform door system according to an embodiment of the present invention;
figure 2 is a schematic diagram of a second safety circuit for a platform door system according to an embodiment of the present application;
fig. 3 is a schematic circuit diagram of a third safety circuit for a platform door system according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments.
Fig. 1 is a schematic diagram showing a first platform door system safety circuit according to an embodiment of the present application, and referring to fig. 1, the platform door system safety circuit includes a first solid-state relay, a second solid-state relay, a first travel switch 3, and a second travel switch 4; the first output end 6 of the first solid-state relay is connected with the signal input end 5 of the safety loop, the second output end 10 of the first solid-state relay is connected with the first output end 11 of the second solid-state relay, and the signal input end 5 of the safety loop is connected with the signal output end 15 of the safety loop of the last platform door. A first input end 7 of the first solid-state relay is connected with one end of a first travel switch 3, and a second input end 8 of the first solid-state relay is connected with one end of a second travel switch 4 and a DCU (door control unit) input signal end 9; the other end of the first travel switch 3 is connected with a DCU input signal end 9; the other end of the second travel switch 4 is connected with a first input end 12 of a second solid-state relay; and a second input end 13 of the second solid-state relay is connected with a DCU input signal end 9, a second output end 14 of the second solid-state relay is connected with a safety loop signal output end 15, and the safety loop signal output end 15 is connected with a safety loop signal input end 5 of the next platform door. The first travel switch 3 is a travel switch of a sliding door, and the second travel switch 4 is a travel switch of an emergency door.
The first solid state relay, the second solid state relay, the first travel switch 3 and the second travel switch 4 form a main trunk, and when the main trunk is switched on after the platform door is electrified and a DCU input signal end completes self-checking, the first travel switch 3 and the second travel switch 4 are switched off, so that a safety loop signal is transmitted to a safety loop signal output end 15 from a safety loop signal input end 5 through the first solid state relay and the second solid state relay.
The first output end 6 of the first solid-state relay is connected with the signal input end 5 of the safety loop, the first input end 7 of the first solid-state relay is connected with the first travel switch 3 connected with the input signal end 9 of the DCU, the first travel switch 3 is controlled to be closed through the DCU signal, the first output end 6 of the first solid-state relay and the second output end 10 of the first solid-state relay are conducted, the safety loop signal is transmitted to the first output end 11 of the second solid-state relay through the first output end 6 of the first solid-state relay and the second output end 10 of the first solid-state relay, the conduction of the first solid-state relay and the input of the DCU signal are triggered and input through the contact of the first travel switch 3, the input of the safety loop signal and the input of the DCU signal are the same input source, and the problem that the input of the safety loop signal and the contact of the travel switch of the DCU signal are not synchronous is solved, thereby improving the stability of the platform door safety loop circuit. In addition, the first output end 11 of the second solid-state relay is connected with the second output end 10 of the first solid-state relay, the first input end is connected with the second travel switch 4 connected with the DCU input signal end 9, the second travel switch 4 is controlled to be closed through the DCU signal, the first output end 11 of the second solid-state relay and the second output end 14 of the second solid-state relay are conducted, the safety loop signal is transmitted to the safety loop signal output end 15 through the first output end 11 of the second solid-state relay and the second output end 14 of the second solid-state relay, the conduction of the second solid-state relay and the DCU signal input are triggered and input through the contact of the second travel switch 4, the safety loop signal input and the DCU signal input are the same input source, and the problem that the travel switch contact of the safety loop signal input and the DCU signal input are not synchronous is solved, thereby improving the stability of the platform door safety loop circuit.
Fig. 2 is a schematic diagram showing a second platform door system safety circuit according to an embodiment of the present application, and referring to fig. 2, the platform door system safety circuit includes a first normally open relay 1, a second normally open relay 2, a first solid state relay, a second solid state relay, a first travel switch 3, a second travel switch 4, a first normally closed relay 17, a second normally closed relay 18, a third travel switch 19, and a fourth travel switch 20; one end of the first normally open relay 1 is connected with a signal input end 5 of the safety loop, and the other end of the first normally open relay is connected with a first output end 6 of the first solid-state relay; a first input end 7 of the first solid-state relay is connected with one end of a first travel switch 3, a second input end 8 of the first solid-state relay is connected with one end of a second travel switch 4 and a DCU input signal end 9, and a second output end 10 of the first solid-state relay is connected with a first output end 11 of a second solid-state relay; the other end of the first travel switch 3 is connected with a DCU input signal end 9; the other end of the second travel switch 4 is connected with a first input end 12 of a second solid-state relay; a second input end 13 of the second solid-state relay is connected with the DCU input signal end 9, and a second output end 14 of the second solid-state relay is connected with one end of a second normally-open relay 2; the other end of the second normally open relay 2 is connected with a safety loop signal output end 15; one end of the first normally closed relay 17 is connected with the signal input end 5 of the safety loop, and the other end of the first normally closed relay is connected with one end of a third stroke switch 19; the other end of the third travel switch 19 is connected with one end of a fourth travel switch 20; the other end of the fourth travel switch 20 is connected with one end of a second normally closed relay 18; the other end of the second normally closed relay 18 is connected with the safety circuit signal output terminal 15. First normally open relay 1 with the second normally open relay 2 is connected with second DCU control signal end 16 respectively, first normally open relay 1 with the second normally open relay 2 connects the same DCU control signal end, perhaps first normally open relay 1 with the second normally open relay 2 is integrated in same relay, realizes first normally open relay 1 and second normally open relay 2's function through the closure of different contacts. The first normally closed relay 17 and the second normally closed relay 18 are respectively connected with a third DCU control signal end 21, the first normally closed relay 17 and the second normally closed relay 18 are connected with the same DCU control signal end, or the first normally closed relay 17 and the second normally closed relay 18 are integrated in the same relay, and the functions of the first normally closed relay 17 and the second normally closed relay 18 are realized through the closing of different contacts. Or the first normally open relay 1, the second normally open relay 2, the first normally closed relay 17 and the second normally closed relay 18 are integrated in the same relay, and the functions of the first normally open relay 1, the second normally open relay 2, the first normally closed relay 17 and the second normally closed relay 18 are realized through the closing of different contacts. The relay can be a double normally closed double normally open output type relay. The third travel switch 19 is a travel switch of a sliding door, and the fourth travel switch 20 is a travel switch of an emergency door.
The first normally open relay 1, the second normally open relay 2, the first solid state relay, the second solid state relay, the first travel switch 3 and the second travel switch 4 form a trunk circuit, and the first normally closed relay 17, the second normally closed relay 18, the third travel switch 19 and the fourth travel switch 20 form a standby branch circuit. When the platform door is in a power-off state or the main road has an abnormal state, the safety loop signal is output through the standby branch road. When the main line is detected to be abnormal, the first normally-open relay 1 and the second normally-open relay 2 are disconnected by stopping the second DCU control signal terminal 16 from outputting DCU control signals, so that the main line is in an open-circuit state. And, the third travel switch 19 and the fourth travel switch 20 are closed, so that the standby branch is conducted, and the safety loop signal is transmitted to the safety loop signal output terminal 15 through the safety loop signal input terminal 5, the first normally closed relay 17, the third travel switch 19, the fourth travel switch 20 and the second normally closed relay 18. According to the embodiment of the application, the main-standby switching mode is adopted, when power is off or a main trunk circuit fails, the standby branch circuit works, the stability of the platform door safety circuit is greatly improved, and the problem that the whole side safety circuit works abnormally due to single contact failure is solved.
Fig. 3 is a schematic diagram of a third platform door system safety circuit according to an embodiment of the present invention, and referring to fig. 3, the platform door system safety circuit includes a first normally open relay 1, a second normally open relay 2, a first solid state relay, a second solid state relay, a first travel switch 3, a second travel switch 4, a first normally closed relay 17, a second normally closed relay 18, a third travel switch 19, a fourth travel switch 20, and a third solid state relay, and the third solid state relay is disposed between the second output terminal 14 of the second solid state relay and the second normally open relay 2.
One end of the first normally open relay 1 is connected with a signal input end 5 of the safety loop, and the other end of the first normally open relay is connected with a first output end 6 of the first solid-state relay; a first input end 7 of the first solid-state relay is connected with one end of a first travel switch 3, a second input end 8 of the first solid-state relay is connected with one end of a second travel switch 4 and a DCU input signal end 9, and a second output end 10 of the first solid-state relay is connected with a first output end 11 of a second solid-state relay; the other end of the first travel switch 3 is connected with a DCU input signal end 9; the other end of the second travel switch 4 is connected with a first input end 12 of a second solid-state relay; the second input end 13 of the second solid-state relay is connected with the input signal end 9 of the DCU, and the second output end 14 of the second solid-state relay is connected with the first output end 22 of the third solid-state relay; the first input end 23 of the third solid-state relay and the second input end 24 of the third solid-state relay are connected with the first DCU control signal end 25, and the second output end 26 of the third solid-state relay is connected with one end of the second normally-open relay 2; the other end of the second normally open relay 2 is connected with a safety loop signal output end 15. The first DCU control signal terminal 25 is used for controlling the conduction of the third solid-state relay after detecting that the conduction signals of the first travel switch 3 and the second travel switch 4 are stable. The first solid state relay, the second solid state relay, and the third solid state relay are direct current type solid state relays. One end of the first normally closed relay 17 is connected with the signal input end 5 of the safety loop, and the other end of the first normally closed relay is connected with one end of a third stroke switch 19; the other end of the third travel switch 19 is connected with one end of a fourth travel switch 20; the other end of the fourth travel switch 20 is connected with one end of a second normally closed relay 18; the other end of the second normally closed relay 18 is connected with the safety circuit signal output terminal 15. First normally open relay 1 with the second normally open relay 2 is connected with second DCU control signal end 16 respectively, first normally open relay 1 with the second normally open relay 2 connects the same DCU control signal end, perhaps first normally open relay 1 with the second normally open relay 2 is integrated in same relay, realizes first normally open relay 1 and second normally open relay 2's function through the closure of different contacts. The first normally closed relay 17 and the second normally closed relay 18 are respectively connected with a third DCU control signal end 21, the first normally closed relay 17 and the second normally closed relay 18 are connected with the same DCU control signal end, or the first normally closed relay 17 and the second normally closed relay 18 are integrated in the same relay, and the functions of the first normally closed relay 17 and the second normally closed relay 18 are realized through the closing of different contacts. Or the first normally open relay 1, the second normally open relay 2, the first normally closed relay 17 and the second normally closed relay 18 are integrated in the same relay, and the functions of the first normally open relay 1, the second normally open relay 2, the first normally closed relay 17 and the second normally closed relay 18 are realized through the closing of different contacts. The relay can be a double normally closed double normally open output type relay.
First normally open relay 1, the relay 2 is normally opened to the second, first solid state relay, second solid state relay, third solid state relay, first travel switch 3 and second travel switch 4 constitute the trunk way, after platform door circular telegram, DCU input signal end 9 and the 16 self-checking backs of second DCU control signal end are accomplished, 16 output control signal enable signal relay coils of second DCU control signal end, make first normally open relay 1 and the normally open relay 2 of second close, thereby make the trunk way switch on. When the main trunk is switched on, the first travel switch 3 and the second travel switch 4 are closed, and the first normally-opened relay 1 and the second normally-opened relay 2 are closed, so that the safety circuit signal is transmitted to the first output end 22 of the third solid-state relay from the safety circuit signal input end 5 through the first solid-state relay and the second solid-state relay. The first DCU control signal terminal 25 is configured to output a corresponding control signal to the third solid-state relay after detecting that the first travel switch 3 and the second travel switch 4 are stable in conduction signal, so that the third solid-state relay is turned on, and thus the safety circuit signal is transmitted to the safety circuit signal output terminal 15 from the first output terminal 22 of the third solid-state relay through the second output terminal 26 of the third solid-state relay. The embodiment of the application controls the third solid-state relay to be switched on after detecting that the first travel switch 3 and the second travel switch 4 are switched on and signals are stable through controlling the first DCU control signal end 25 by software, so that the software and hardware combined output control is realized, the third solid-state relay is controlled to be switched on to transmit the safety circuit signals to the safety circuit signal output end 15 after waiting for the first travel switch 3 and the second travel switch 4 to be switched on and signals are stable, the problem that the safety circuit signal state caused by the shaking of the travel switches is unstable is solved, and the stability of the platform door safety circuit is improved.
As mentioned above, the first output terminal 6 of the first solid-state relay is connected with the first normally open relay 1, the first input terminal 7 is connected with the first travel switch 3 connected with the DCU input signal terminal 9, so as to control the first travel switch 3 to be closed through the DCU signal, so that the first output terminal 6 of the first solid-state relay and the second output terminal 10 of the first solid-state relay are conducted, so that the safety loop signal is transmitted to the first output terminal 11 of the second solid-state relay through the first output terminal 6 of the first solid-state relay and the second output terminal 10 of the first solid-state relay, so that the conduction of the first solid-state relay and the DCU signal input are triggered and input through the contact of the first travel switch 3, thereby realizing that the safety loop signal input and the DCU signal input are the same input source, and solving the problem that the travel switch contact of the safety loop signal input and the DCU signal input is not synchronous, thereby improving the stability of the platform door safety loop circuit. In addition, the first output end 11 of the second solid-state relay is connected with the second output end 10 of the first solid-state relay, the first input end is connected with the second travel switch 4 connected with the DCU input signal end 9, the second travel switch 4 is controlled to be closed through the DCU signal, the first output end 11 of the second solid-state relay and the second output end 14 of the second solid-state relay are conducted, the safety loop signal is transmitted to the safety loop signal output end 15 through the first output end 11 of the second solid-state relay and the second output end 14 of the second solid-state relay, the conduction of the second solid-state relay and the DCU signal input are triggered and input through the contact of the second travel switch 4, the safety loop signal input and the DCU signal input are the same input source, and the problem that the travel switch contact of the safety loop signal input and the DCU signal input are not synchronous is solved, thereby improving the stability of the platform door safety loop circuit.
An embodiment of the present application further provides an electronic device, including the platform door system safety loop circuit described above.
In the description of the present application, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the present application.
In this application, unless expressly stated or limited otherwise, the terms "disposed," "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integral to one another; they may be mechanically coupled, directly coupled, or indirectly coupled through intervening agents, both internally and/or in any other manner known to those skilled in the art. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
It should be noted that in this application, unless explicitly stated or limited otherwise, a first feature "on" or "under" a second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
The above description is only for the preferred embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present application, and equivalent alternatives or modifications according to the technical solutions and the application concepts of the present application, which are within the technical scope of the present application.
Claims (10)
1. A platform door system safety loop circuit, comprising: the relay comprises a first solid-state relay, a second solid-state relay, a first travel switch and a second travel switch;
the first output end of the first solid-state relay is connected with a signal input end of a safety loop, the second output end of the first solid-state relay is connected with the first output end of the second solid-state relay, the first input end of the first solid-state relay is connected with one end of a first travel switch, and the second input end of the first solid-state relay is connected with one end of the second travel switch and a DCU input signal end;
the other end of the first travel switch is connected with a DCU input signal end;
the other end of the second travel switch is connected with a first input end of a second solid-state relay;
and a second input end of the second solid-state relay is connected with a DCU input signal end, and a second output end of the second solid-state relay is connected with a safety circuit signal output end.
2. A platform door system safety loop circuit according to claim 1, further comprising: the safety circuit comprises a first normally open relay, a second normally open relay, a first normally closed relay, a second normally closed relay, a third travel switch and a fourth travel switch, wherein the first normally open relay is arranged between a safety circuit signal input end and a first output end of a first solid-state relay, and the second normally open relay is arranged between a second output end of a second solid-state relay and a safety circuit signal output end;
one end of the first normally open relay is connected with the signal input end of the safety loop, and the other end of the first normally open relay is connected with the first output end of the first solid-state relay; one end of the second normally open relay is connected with the second output end of the second solid state relay, and the other end of the second normally open relay is connected with the signal output end of the safety loop;
one end of the first normally closed relay is connected with a signal input end of the safety loop, and the other end of the first normally closed relay is connected with one end of the third stroke switch;
the other end of the third travel switch is connected with one end of a fourth travel switch;
the other end of the fourth travel switch is connected with one end of a second normally closed relay;
and the other end of the second normally closed relay is connected with a signal output end of the safety circuit.
3. A platform door system safety loop circuit according to claim 2, wherein the circuit further comprises: the third solid-state relay is arranged between the second output end of the second solid-state relay and the second normally-open relay;
the first input end and the second input end of the third solid-state relay are connected with the first DCU control signal end, the first output end of the third solid-state relay is connected with the second output end of the second solid-state relay, and the second output end of the third solid-state relay is connected with one end of the second normally-open relay;
and the first DCU control signal end is used for controlling the conduction of the third solid-state relay after detecting that the conduction signals of the first travel switch and the second travel switch are stable.
4. A platform door system safety loop circuit according to claim 2, wherein the circuit further comprises: and the first normally-open relay and the second normally-open relay are respectively connected with a second DCU control signal end.
5. A platform door system safety loop circuit according to claim 2, further comprising: and the first normally closed relay and the second normally closed relay are respectively connected with a third DCU control signal end.
6. A platform door system safety loop circuit according to claim 1, further comprising: the safety loop signal input end is connected with the safety loop signal output end of the last platform door;
and the safety loop signal output end is connected with the safety loop signal input end of the next platform door.
7. A platform door system safety loop circuit as claimed in claim 1, wherein the first travel switch is a travel switch for a sliding door and the second travel switch is a travel switch for an emergency door.
8. A platform door system safety loop circuit as claimed in claim 2, wherein the third travel switch is a travel switch for a sliding door and the fourth travel switch is a travel switch for an emergency door.
9. A platform door system safety loop circuit according to claim 3, wherein the first, second and third solid state relays are dc type solid state relays.
10. An electronic device comprising a platform door system safety loop circuit as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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