CN203587768U - Relay contact fault detection system - Google Patents
Relay contact fault detection system Download PDFInfo
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- CN203587768U CN203587768U CN201320782974.0U CN201320782974U CN203587768U CN 203587768 U CN203587768 U CN 203587768U CN 201320782974 U CN201320782974 U CN 201320782974U CN 203587768 U CN203587768 U CN 203587768U
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Abstract
The utility model relates to a relay contact fault detection system comprising a system high-voltage power supply, a internally-controlled low-voltage power supply, a load electrically connected with the system high-voltage power supply, a first relay electrically connected with the system high-voltage power supply, a second relay electrically connected with the load, a first control loop unit electrically connected with a first normally-closed contact of the first relay, and a second control loop unit electrically connected with a second normally-closed contact of the second relay. Therefore, normal operation of the first relay and the second relay can be effectively ensured; and whether abnormal complete suction or welding occurs at the first relay and the second relay can be detected at any time, so that the public security accident rate can be reduced beneficially.
Description
Technical field
The utility model relates to a kind of make and break contact detecting fault system, particularly relates to a kind ofly effectively guaranteeing that normal opened contact can disconnect and detect the relay tip detecting fault system of contact state.
Background technology
Relay (Relay) is a kind of Electronic Control Unit; conventionally be applied in automatic control circuit; it is actually a kind of " automatic switch " that removes to control larger electric current with less electric current, so can bring into play the effects such as automatic adjusting, safeguard protection, change-over circuit in circuit.
Consulting Fig. 1, is the control circuit figure of a kind of known use 2 relays 11,12 as changeover contact, and circuit running is as follows:
One control system 100 comprises an input control pin P5, and two output control pin P1, P2, the pin C1 of relay 11 is electrically connected to the output of this control system 100 and controls pin P1, the pin C1 of relay 12 is electrically connected to this output and controls pin P2, the input control pin P5 of control system 100 is electrically connected between two resistor R1, R2, and from internal system, controls low-tension supply VCC2 acquisition noble potential via the dividing potential drop effect of two resistance R 1, R2.
When this output is controlled pin P1 and is all electronegative potential with this output control pin P2, the normal opened contact NO1 of relay 11 contact COM1 conducting together, and the normal opened contact NO2 of relay 12 contact COM2 conducting together, now power supply 13 path conducting offered load 14 actions.
When the normal opened contact NO2 of relay 11 is together during contact COM2 conducting, make the power supply control pin P3 of relay 11 connect and be total to contact COM2 to internal system control low-tension supply VCC1 by normal opened contact NO2, the normal opened contact NO1 of relay 12 contact COM1 conducting together, makes the power supply control pin P4 of relay 12 connect and be total to contact COM1 to internal system control low-tension supply VCC1 by normal opened contact NO1.
When the normally closed contact NC2 of relay 11 contact COM2 conducting together, power supply control pin P4 is total to contact COM2 to internal system control low-tension supply VCC1 by the normally closed contact NC2 connection of relay 12, the normally closed contact NC1 of relay 12 contact COM1 conducting together, the power supply of relay 11 is controlled pin P3 and is connected and be total to contact COM1 to internal system control low-tension supply VCC1 by normally closed contact NC1.
When this output, control pin P1 and be all noble potential with this output control pin P2, under normal operation, the now normal opened contact NO1 of relay 11 contact COM1 disconnection together, the normal opened contact NO2 of relay 12 together contact COM2 disconnects, power supply 13 paths are disconnected, and load 14 cannot be moved.
When the normal opened contact NO1 of relay 11 is when contact COM1 occurs to inhale dead or welding together, the common contact COM2 of the normally closed contact NC2 of relay 11 and connected system internal control low-tension supply VCC1 disconnects, causing the power supply control pin P4 of relay 12 is electronegative potential, and internal system is controlled low-tension supply VCC1 disconnection.When the output control pin P2 of relay 12 is electronegative potential, relay 12 cannot move, and makes control system 100 can not have abnormal lower malfunction at relay 11.
When the normal opened contact NO1 of relay 11 is when contact COM1 occurs to inhale dead or welding together, only have the normal opened contact NO2 of relay 12 can normally discharge common contact COM2, power supply 13 paths that could interrupt load 14.When the normal opened contact NO2 of relay 12 together contact COM2 inhale dead or welding, pin P1 is controlled in this output and this output control pin P2 is all noble potential, release relay 11 and relay 12, the normal opened contact NO1 of relay 11 can normally discharge common contact COM1, has guaranteed power supply 13 paths of interrupt load 14.
When the normal opened contact NO2 of relay 12 together contact COM2 inhale dead or welding, because the normal opened contact NO1 that mechanism's interlock causes relay 12 together contact COM1 inhales dead, the common contact COM1 of the normally closed contact NC1 of relay 11 and connected system internal control low-tension supply VCC1 disconnects, the power supply control pin P3 that results in relay 11 is electronegative potential, and internal system is controlled low-tension supply VCC1 disconnection.When this output control pin P1 is electronegative potential, relay 11 cannot move, and makes control system 100 can not have abnormal lower malfunction at relay 12.
Temporary transient power supply supply when resistor R3, R4 and capacitor C1, C2 provide relay 11 and relay 12 to switch, resistor R3, R4 also provide the reference power source of electronegative potential, and limiting this output, to control pin P1 and this output control pin P2 be noble potential and can malfunction.
When controlling low-tension supply VCC2 by the dividing potential drop effect of two resistance R 1, R2 from internal system, input control pin P5 obtains noble potential, when the power supply control pin P4 of relay 12 is electronegative potential, by the diode D1 characteristic of conducting forward, make the noble potential of input control pin P5 reduce to electronegative potential; Or when the power supply of relay 11 is controlled pin P3 and is electronegative potential, input control pin P5 by diode D2 forward the characteristic of conducting also can become electronegative potential; Separately, when the power supply control pin P4 of relay 12 is noble potential, diode D1 is reverse disconnection, makes input control pin P5 maintain noble potential; When the power supply control pin P3 of relay 11 is noble potential, the reverse disconnection of diode D2, input control pin P5 maintains noble potential.
Yet because using on machinery is controlled, if while running into alert anxious situation, emergent stopping is quite important, and relay 11,12 is likely inhaled dead or welding, causes and cannot stop, and then easily cause causing public security danger.
Summary of the invention
The purpose of this utility model is to provide a kind of can effectively guarantee first and second relay energy normal operation, can detect contact state, and then more can contribute to reduce the relay tip detecting fault system of public security accident rate simultaneously.
The utility model relay tip detecting fault system, comprise a system high pressure power supply, an internal control low-tension supply, a load being electrically connected to this system high pressure power supply, first relay, second relay, a first control loop unit, and a second control loop unit.This first relay has first normal opened contact being electrically connected to this system high pressure power supply, one first contact, the first normally closed contact, a first coil contact and use and control pin with one first output of a control system and be electrically connected to altogether, and a second coil contact being electrically connected to this internal control low-tension supply; This second relay has second normal opened contact being electrically connected to this load, the second common contact, second normally closed contact, a first coil contact being electrically connected to this internal control low-tension supply being electrically connected to this first common contact, and one is controlled with one second output of this control system the second coil contact that pin is electrically connected to; This first control loop unit comprises that one in order to produce oscillatory circuit, this oscillatory circuit of electrical connection of a string ripple signal and to process the amplifying circuit of this string ripple signal, a transformer that is electrically connected to this amplifying circuit in order to amplification, and first normally closed contact that is electrically connected to this transformer and this first relay is also used so that this string ripple signal rectification forms the diode of positive half-wave signal; This second control loop unit comprises that one is electrically connected to the resistor of the second normally closed contact of this second relay, a photo-coupler that is electrically connected to this resistor, and an inverting integrator, this inverting integrator is electrically connected to an input control pin of this photo-coupler and this control system.
The utility model relay tip detecting fault system, also comprises a fuse being electrically connected between this system high pressure power supply and this load.
The utility model relay tip detecting fault system, comprise a system high pressure power supply, an internal control low-tension supply, a load being electrically connected to this system high pressure power supply, first relay, second relay, a first control loop unit, and 2 second control loop unit.This first relay has first normal opened contact being electrically connected to this system high pressure power supply, one first, and contact, first normally closed contact, first coil contact are used and are controlled pin with one first output of a control system and be electrically connected to, an and second coil contact being electrically connected to this internal control low-tension supply altogether, this second relay has second normal opened contact being electrically connected to this load, the second common contact, second normally closed contact, a first coil contact being electrically connected to this internal control low-tension supply being electrically connected to this first common contact, and one is controlled with one second output of this control system the second coil contact that pin is electrically connected to, this the first control loop unit comprises that one in order to produce the oscillatory circuit of a string ripple signal, an amplifying circuit that is electrically connected to this oscillatory circuit and processes this string ripple signal in order to amplify, a transformer that is electrically connected to this amplifying circuit, and a diode that is electrically connected to this transformer, this diode is also electrically connected to this first this second contact and with so that this string ripple signal rectification forms positive half-wave signal altogether of contact and this second relay altogether of this first relay, described the second control loop unit is electrically connected to respectively this first normally closed contact of this first relay, this second normally closed contact of this second relay, each second control loop unit comprises a resistor, a photo-coupler that is electrically connected to this resistor, an and inverting integrator that is electrically connected to this photo-coupler, respectively this resistor is electrically connected to respectively this first normally closed contact of this first relay, this second normally closed contact of this second relay, respectively this inverting integrator is also electrically connected to respectively a first input control pin and a second input control pin of this control system.
The utility model relay tip detecting fault system, also comprises a fuse being electrically connected between this system high pressure power supply and this load.
The utility model relay tip detecting fault system; comprise a system high pressure power supply, an internal control low-tension supply, a load being electrically connected to this system high pressure power supply, first relay, second relay, a first control loop unit, two the second control loop unit, first power switch, a second source switch, a first protection circuit units, and one second protection circuit units.This first relay has first normal opened contact being electrically connected to this system high pressure power supply, a first common contact, first normally closed contact, a first coil contact, and a second coil contact being electrically connected to internal control low-tension supply, this second relay has second normal opened contact being electrically connected to this load, the second common contact, second normally closed contact, a first coil contact being electrically connected to this internal control low-tension supply being electrically connected to this first common contact, and a second coil contact, this the first control loop unit comprises that one in order to produce the oscillatory circuit of a string ripple signal, an amplifying circuit that is electrically connected to this oscillatory circuit and processes this string ripple signal in order to amplify, a transformer that is electrically connected to this amplifying circuit, and a diode that is electrically connected to this transformer, this diode is also electrically connected to this first this second contact and with so that this string ripple signal rectification forms positive half-wave signal altogether of contact and this second relay altogether of this first relay, described the second control loop unit is electrically connected to respectively this first normally closed contact of this first relay, this second normally closed contact of this second relay, each second control loop unit comprises a resistor, a photo-coupler that is electrically connected to this resistor, an and inverting integrator that is electrically connected to this photo-coupler, respectively this resistor is electrically connected to respectively this first normally closed contact of this first relay, this second normally closed contact of this second relay, respectively this inverting integrator is also electrically connected to respectively a first input control pin and a second input control pin of this control system, this first power switch is electrically connected to the second coil contact of this first relay, this second source switch is electrically connected to the first coil contact of this second relay, this the first protection circuit units comprise first mutual exclusion or door, one be electrically connected to the first time delay electronegative potential bolt-lock of this first mutual exclusion or door, a first anti-phase level converter that is electrically connected to this first time delay electronegative potential bolt-lock and this second source switch, an and second anti-phase level converter being electrically connected to this first coil contact of this first relay, one first output of this control system is controlled pin and is electrically connected to this second anti-phase level converter and this first mutual exclusion or door, and the first input control pin of this control system is electrically connected to this first mutual exclusion or door, this the second protection circuit units comprise second mutual exclusion or door, one be electrically connected to the second time delay electronegative potential bolt-lock of this second mutual exclusion or door, a 3rd anti-phase level converter that is electrically connected to this second time delay electronegative potential bolt-lock and this first power switch, and a 4th anti-phase level converter being electrically connected to this second coil contact of this second relay, one second output of this control system is controlled pin and is electrically connected to the 4th anti-phase level converter and this second mutual exclusion or door, and the second input control pin of this control system is electrically connected to this second mutual exclusion or door.
The utility model relay tip detecting fault system, also comprises a fuse being electrically connected between this system high pressure power supply and this load.
The utility model relay tip detecting fault system, also includes two capacitors, is electrically connected to respectively this second coil contact of this first relay, this first coil contact of this second relay.
The beneficial effects of the utility model are: can effectively guarantee the first relay, the second relay energy normal operation, use is on machinery is controlled, can detect at any time the first relay, the second relay whether abnormal inhale dead or welding occur, the situation that while avoiding occurring alert anxious situation, machinery but cannot emergent stopping, thereby can also contribute to reduce public security accident rate.
Accompanying drawing explanation
Fig. 1 is that 2 relays of a kind of known use are as the main contact control circuit figure of changeover contact;
Fig. 2 is a circuit box schematic diagram, and the first preferred embodiment of the utility model relay tip detecting fault system is described;
Fig. 3 is a circuit box schematic diagram, and the second preferred embodiment of the utility model relay tip detecting fault system is described; And
Fig. 4 is a circuit box schematic diagram, and the 3rd preferred embodiment of the utility model relay tip detecting fault system is described.
Embodiment
Below in conjunction with drawings and Examples, the utility model is elaborated.
Before the utility model is described in detail, be noted that in the following description content, similarly assembly is to represent with identical numbering.
Consult Fig. 2, the first preferred embodiment for the utility model relay tip detecting fault system, comprise a system high pressure power supply 31, a load being electrically connected to this system high pressure power supply 31 32, one first relay 33, one second relay 34, one first control loop unit 35, one second control loop unit 36, and an internal control low-tension supply VCC1.In addition, the utility model relay tip detecting fault system also comprises a fuse 37 that is electrically connected on 32 of this system high pressure power supply 31 and this loads.And this preferred embodiment is applicable to a control system 5, it has, and pin 51 is controlled in one first output, pin 52 is controlled in one second output, and one first input control pin 53.
This first relay 33 has first normal opened contact (NO) being electrically connected to this system high pressure power supply 31 331, one first and is total to contact 332, one first normally closed contact (NC) 333, a first coil contact (C1) 334 being electrically connected to the first output control pin 51 of this control system 5, and one second coil contact (C2) 335.This second relay 34 has second normal opened contact (NO) being electrically connected to this load 32 341, the second common contact (COM) 342, one second normally closed contact (NC) 343, the first coil contact (C1) 344 being electrically connected to this internal control low-tension supply VCC1 being electrically connected to this first common contact (COM) 332, and one controls with the second output of this control system 5 the second coil contact (C2) 345 that pin 52 is electrically connected to.
And this first control loop unit 35 comprises that one is electrically connected to this oscillatory circuit 351 and processes the amplifying circuit 352 of this string ripple signal, the transformer 353 of this amplifying circuit 352 of electrical connection in order to amplify in order to produce the oscillatory circuit 351, of a string ripple signal, and the diode 354 of this transformer 353 of electrical connection.
This second control loop unit 36 comprises that one is electrically connected to the resistor 361 of second normally closed contact (NC) 343 of this second relay 34, the photo-coupler 362 of this resistor 361 of electrical connection via a contact state feedback pin 346, and an inverting integrator 363.The input end of inverting integrator 363 is electrically connected to this photo-coupler 362, and the output terminal of inverting integrator 363 is electrically connected to the first input control pin 53 of this control system 5 via a contact state detecting pin 364.
In the use, the string ripple signal that this oscillatory circuit 351 produces, through amplifying circuit 352, amplify after processing, by transformer 353, signal is coupled to secondary side, relends and by diode 354, string ripple signal is rectified into first normally closed contact (NC) 333 of positive half-wave signal feed-in the first relay 33.
When the first coil contact (C1) 334 of the first relay 33 and the second coil contact (C2) 345 of the second relay 34 are noble potential, first normally closed contact (NC) 333 of the first relay 33 and first altogether contact (COM) 332 is connected, and second normally closed contact (NC) 343 of the second relay 34 and second altogether contact (COM) 342 is connected, the contact state feedback pin 336 of the first relay 33 and the contact state feedback pin 346 of the second relay 34 can make described positive half-wave signal by the first relay 33, the second relay 34, and input this second control loop unit 36.
If now the first coil contact (C1) 334 of the first relay 33 or the second coil contact (C2) 345 of the second relay 34 are noble potential, first normal opened contact (NO) 331 of the first relay 33 and first altogether contact (COM) 332 disconnects, and second normal opened contact (NO) 341 of the second relay 34 and second altogether contact (COM) 342 disconnects, and then system high pressure power supply 31 paths also can be disconnected, cause load 32 to move.
If the second coil contact (C2) 345 of the first coil contact (C1) 334 of the first relay 33 or the second relay 34 is electronegative potential; first normal opened contact (NO) 331 of the first relay 33 and first altogether contact (COM) 332 is connected; and second normal opened contact (NO) 341 of the second relay 34 and second altogether contact (COM) 342 is connected; make the 31 path conductings of system high pressure power supply; now load 32 can be moved, and provides overload protection by 37 pairs of loads 32 of fuse simultaneously.And first normally closed contact (NC) 333 of the first relay 33 and first is total to contact (COM) 332 for disconnecting, second normally closed contact (NC) 343 of the second relay 34 and second altogether contact (COM) 342 is also disconnection, the contact state feedback pin 336 that is now connected in 333 of the diode 354 of the first control loop unit 35 and first normally closed contacts (NC) of the first relay 33 is for without signal, and to be connected in the resistor 361 of the second control loop unit 36 be without signal with the contact state feedback pin 346 of 343 of second normally closed contacts (NC) of the second relay 34.
In addition, when the first coil contact (C1) 334 of the first relay 33 or the second coil contact (C2) 345 of the second relay 34 are noble potential, and first normal opened contact (NO) 331 of the first relay 33 and first altogether contact (COM) 332 does not disconnect but is and inhale extremely or welding, or 341 pairs second of second normal opened contacts (NO) of the second relay 34 altogether contacts (COM) 342 does not disconnect but is and inhale extremely or welding, causing contact state feedback pin 336 is without signal, and then make photo-coupler 362 input ends for without signal, because photo-coupler 362 input sides are light emitting diode, without signal, cannot change into light signal, and the outgoing side of photo-coupler 362 is light NPN transistor and is output as a direct current level noble potential, by inverting integrator 363, make contact state detecting pin 364 for electronegative potential, and input to this control system 5 to carry out interpretation and to give the alarm via the first input control pin 53.
As shown in Figure 3, the second preferred embodiment for the utility model relay tip detecting fault system, this preferred embodiment is roughly the same with the first preferred embodiment, and different places is that second of the diode 354 of the first control loop unit 35 and the first common contact (COM) 332 of this first relay 33 and this second relay 34 is total to contact (COM) 342 and is electrically connected to; In addition, the relay tip detecting fault system of the present embodiment includes two the second control loop unit 36,38.And the applicable control system 5 of this preferred embodiment also has one second input control pin 54.
The circuit framework of described the second control loop unit 36,38 is identical, wherein this second control loop unit 36 is that the contact state feedback pin 346 being connected by the second normally closed contact (NC) 343 with the second relay 34 is electrically connected to this resistor 361 equally, and the output terminal of the inverting integrator 363 of this second control loop unit 36 is also by this contact state detecting pin 364, to be electrically connected to the first input control pin 53 of this control system 5.This second control loop unit 38 is that the contact state feedback pin 336 being connected by the first normally closed contact (NC) 333 with the first relay 33 is electrically connected to this resistor 381.In addition, the output terminal of the inverting integrator 383 of this second control loop unit 38 is electrically connected to the second input control pin 54 of this control system 5 by a contact state detecting pin 384.
In the use, the string ripple signal being produced by oscillatory circuit 351, through amplifying circuit 352, carry out after signal amplification, relend by transformer 353 signal is coupled to secondary side, and then be rectified into the first common contact (COM) 332 of positive half-wave signal feed-in the first relay 33 and the second common contact (COM) 342 of this second relay 34 by diode 354.
When the first coil contact (C1) 334 of the first relay 33 or the second coil contact (C2) 345 of the second relay 34 are noble potential, first normally closed contact (NC) 333 of the first relay 33 and first altogether contact (COM) 332 is connection, second normally closed contact (NC) 343 of the second relay 34 and second altogether contact (COM) 342 is also connected, the contact state feedback pin 336 of the first relay 33 and the contact state feedback pin 346 of the second relay 34 are further passed to positive half-wave signal the first common contact (COM) 332 of the first relay 33 and the second common contact (COM) 342 of the second relay 34, the first normal opened contact (NO) 331 and the first common contact (COM) 332 of the first relay 33 are disconnected, second normal opened contact (NO) 341 of the second relay 34 and second altogether contact (COM) 342 is disconnected, cause system high pressure power supply 31 paths to disconnect, load 32 cannot be moved.
When the first coil contact (C1) 334 of the first relay 33 or the second coil contact (C2) 345 of the second relay 34 are electronegative potential, 341 pairs second of second normal opened contacts (NO) of first normal opened contact (NO) 331 of the first relay 33 and the first common contact (COM) 332 and the second relay 34 are total to 342 of contacts (COM) and can connect, make the 31 path conductings of system high pressure power supply, now load 32 can be moved, by 37 pairs of loads 32 of fuse, provide overload protection simultaneously, and first normally closed contact (NC) 333 of the first relay 33 and first is total to contact (COM) 332 for disconnecting, second normally closed contact (NC) 343 of the second relay 34 and second altogether contact (COM) 342 also disconnects, 346 of the contact state feedback pin 336 of the first relay 33 and the contact state feedback pins of the second relay 34 are without signal.
When the first coil contact (C1) 334 of the first relay 33 and the second coil contact (C2) 345 of the second relay 34 are noble potential, first normal opened contact (NO) 331 of the first relay 33 and first altogether contact (COM) 332 is inhaled dead or welding, to cause the contact state feedback pin 336 of the first relay 33 without signal, photo-coupler 382 input sides that make this second control loop unit 38 of corresponding connection are without signal, cannot change into light signal, causing photo-coupler 382 outgoing sides is a direct current level noble potential, by inverting integrator 383, make contact state detecting pin 384 for electronegative potential, and input to this control system 5 to carry out interpretation and to give the alarm via this second input control pin 54.
Now, there is to inhale dead or welding in first normal opened contact (NO) 331 of cause the first relay 33 and first altogether contact (COM) 332, and second normal opened contact (NO) 341 of the second relay 34 and second is total to contact (COM) the 342nd, while normally disconnecting, because circuit serial connection still can regular event, cause system high pressure power supply 31 paths to disconnect, load 32 cannot be moved, and second normally closed contact (NC) 343 of the second relay 34 and the second contact (COM) 342 conductings altogether, make positive half-wave signal can pass through the contact state feedback pin 346 of the second relay 34, and then change into light signal by the photo-coupler 362 positive half-wave signals of this second control loop unit 36 of corresponding connection, by the photistor as photo-coupler 362 output terminals, receive and become square-wave signal again, by inverting integrator 363, making this contact state detecting pin 364 is noble potential, and input to this control system 5 via the first input control pin 53, 5 judgement contact state detecting pins 364 of this control system are normal, but because there is to inhale dead or welding in the first relay 33, the contact state detecting pin 384 that causes the first relay 33 is electronegative potential, make whole control system 5 enter alarm, startup next time cannot be carried out.
When the first coil contact (C1) 334 of the first relay 33 and the second coil contact (C2) 345 of the second relay 34 are noble potential, 341 pairs second of second normal opened contacts (NO) of the second relay 34 are total to contact (COM) 342 and inhale dead or welding, to cause the contact state feedback pin 346 of the second relay 34 without signal, and corresponding photo-coupler 362 is without signal, as aforementioned, by inverting integrator 363, the contact state detecting pin 364 that makes to connect the second relay 34 of this inverting integrator 363 is electronegative potential, and input to these control system 5 interpretations for abnormal and give the alarm via the first input control pin 53, startup next time cannot be carried out.Now, because the first relay 33 does not damage, 331 pairs first of the first normal opened contacts (NO) are total to contact (COM) 332 and normally disconnect, make to cause system high pressure power supply 31 paths to disconnect, load 32 cannot be moved, and the contact state feedback pin 336 of the first relay 33 can make positive half-wave signal pass through, as above-mentioned, can make corresponding photo-coupler 382 change into light signal, by the photistor as output terminal, receive and become square-wave signal, by corresponding inverting integrator 383, and then the contact state detecting pin 384 that makes to connect the first relay 33 of this inverting integrator 383 is noble potential, and input to this control system 5 via the second input control pin 54, 5 judgement contact state detecting pins 384 of this control system are normal, but because there is to inhale dead or welding in the second relay 34, the contact state detecting pin 364 that causes the second relay 34 is electronegative potential, make control system 5 enter alarm, startup next time cannot be carried out.
As shown in Figure 4; the 3rd preferred embodiment for the utility model relay tip detecting fault system; this preferred embodiment is roughly the same with the second preferred embodiment; different places is also to comprise first power switch 41 of the second coil contact (C2) 335 of this first relay 33 of an electrical connection, the second source switch of the first coil contact (C1) 344 of this second relay 34 of electrical connection 42, one first is protected circuit units 39, and one second protection circuit units 30.In addition, also include two capacitors 43,44, be electrically connected to respectively the second coil contact (C2) 335 of this first relay 33, the first coil contact (C1) 344 of this second relay 34.
This first protection circuit units 39 comprises that the first time delay electronegative potential bolt-lock 392, that one first mutual exclusion or door 391, are electrically connected to this first mutual exclusion or door 391 is electrically connected to the first anti-phase level converter 393 of this first time delay electronegative potential bolt-lock 392 and this second source switch 42, and a second anti-phase level converter 394 being electrically connected to this first coil contact (C1) 334 of this first relay 33.The first output of this control system 5 is controlled pin 51 and is controlled pin 338 by a low-voltage and is electrically connected to this second anti-phase level converter 394 and this first mutual exclusion or door 391, and 383 of the inverting integrators of this second control loop unit 38 are to be electrically connected to this first mutual exclusion or door 391 by this contact state detecting pin 384.
This second protection circuit units 30 comprises that the second time delay electronegative potential bolt-lock 302, that one second mutual exclusion or door 301, are electrically connected to this second mutual exclusion or door 301 is electrically connected to the 3rd anti-phase level converter 303 of this second time delay electronegative potential bolt-lock 302 and this first power switch 41, and a 4th anti-phase level converter 304 being electrically connected to this second coil contact (C2) 345 of this second relay 34.The second output of this control system 5 is controlled pin 52 and is controlled pin 347 by a low-voltage and is electrically connected to the 4th anti-phase level converter 304 and this second mutual exclusion or door 301.And be electrically connected to this second relay 34 the second control loop unit 36 inverting integrator 363 and by this contact state detecting pin 364, be electrically connected to these second mutual exclusions or door 301.
In the use, the string ripple signal being produced by oscillatory circuit 351, through amplifying circuit 352, carry out after signal amplification, relend by transformer 353 signal is coupled to secondary side, and then be rectified into the first common contact (COM) 332 of positive half-wave signal feed-in the first relay 33 and the second common contact (COM) 342 of this second relay 34 by diode 354.
When the first coil contact (C1) 334 of the first relay 33 or the second coil contact (C2) 345 of the second relay 34 are noble potential or disconnect with internal control low-tension supply VCC1, first normally closed contact (NC) 333 of the first relay 33 and first altogether contact (COM) 332 is connection, second normally closed contact (NC) 343 of the second relay 34 and second altogether contact (COM) 342 is also connected, positive half-wave signal is by the contact state feedback pin 336 of the first relay 33 and the contact state feedback pin 346 of the second relay 34, the first normal opened contact (NO) 331 and the first common contact (COM) 332 of the first relay 33 are disconnected, second normal opened contact (NO) 341 of the second relay 34 and second altogether contact (COM) 342 is disconnected, cause system high pressure power supply 31 paths to disconnect, load 32 cannot be moved.
When the first coil contact (C1) 334 of the first relay 33 or the second coil contact (C2) 345 of the second relay 34 are electronegative potential, and connect this internal control low-tension supply VCC1, 341 pairs second of second normal opened contacts (NO) of first normal opened contact (NO) 331 of the first relay 33 and the first common contact (COM) 332 and the second relay 34 are total to 342 of contacts (COM) and can connect, make the 31 path conductings of system high pressure power supply, now load 32 can be moved, by 37 pairs of loads 32 of fuse, provide overload protection simultaneously, and first normally closed contact (NC) 333 of the first relay 33 and first is total to contact (COM) 332 for disconnecting, second normally closed contact (NC) 343 of the second relay 34 and second altogether contact (COM) 342 also disconnects, 346 of the contact state feedback pin 336 of the first relay 33 and the contact state feedback pins of the second relay 34 are without signal.
When the contact state feedback pin 336 of the first relay 33 is received positive half-wave signal, the electric current passing through by resistor 381 restrictions, positive half-wave signal arrives photo-coupler 382, the secondary side that signal is further coupled to photo-coupler 382 is again after inverting integrator 383, and the contact state detecting pin 384 that makes the first relay 33 is noble potential.When the contact state feedback pin 336 of the first relay 33 is without signal, cause photo-coupler 382 without signal, the outgoing side of photo-coupler 382 is direct current level noble potential, by inverting integrator 383, making this contact state detecting pin 384 is electronegative potential, and inputs to this control system 5 via the second input control pin 54, and 5 judgement contact state detecting pins 384 of this control system are abnormal, make whole control system 5 enter alarm, next startup cannot be carried out.
When the contact state feedback pin 346 of this second relay 34 is received positive half-wave signal, by resistor 361 restricted passage electric currents, signal arrives photo-coupler 362, and then signal is coupled to outgoing side, through inverting integrator 363, making this contact state detecting pin 364 is noble potential.When the contact state feedback pin 346 of the second relay 34 is without signal, as aforementioned, cause photo-coupler 362 without signal, by inverting integrator 363, the contact state detecting pin 364 that makes the second relay 34 is electronegative potential, and input to this control system 5 via the second input control pin 54, and these control system 5 interpretations are for abnormal and give the alarm, and next startup cannot be carried out.
When this low-voltage, controlling pin 338 is electronegative potential with this low-voltage control pin 347, first normal opened contact (NO) 331 of the first relay 33 and first altogether contact (COM) 332 is inhaled dead or welding, to cause the contact state feedback pin 336 of the first relay 33 without signal, make photo-coupler 382 without signal, its outgoing side is that a direct current level is by inverting integrator 383, the contact state detecting pin 384 that makes the first relay 33 is electronegative potential, and as the low-voltage of aforementioned the first relay 33 control pin 338 is also electronegative potential, thereby the output voltage of two signals that make to control pin 338 via contact state detecting pin 384 and low-voltage by the first mutual exclusion or door 391 is electronegative potential over 0.2 second, make the output voltage of the first time delay electronegative potential bolt-lock 392 keep electronegative potential, by the first anti-phase level converter 393, to control second source switch 42, disconnect with internal control low-tension supply VCC1, the second relay 34 cannot be moved, 341 pairs second contact (COM) 342 disconnections altogether of the second normal opened contact (NO) of the second relay 34, system high pressure power supply 31 paths are disconnected, cause load 32 to move.
When this low-voltage, controlling pin 338 is electronegative potential with this low- voltage control pin 347, 341 pairs second of second normal opened contacts (NO) of the second relay 34 are total to contact (COM) 342 and inhale dead or welding, to cause the contact state feedback pin 346 of the second relay 34 without signal, make photo-coupler 362 without signal, with above-mentioned, its outgoing side is that a direct current level is by inverting integrator 363, now the contact state detecting pin 364 of the second relay 34 is electronegative potential, because of the low-voltage of the second relay 34, controlling pin 347 is electronegative potential, thereby the output voltage of two signals that make to control pin 347 via contact state detecting pin 364 and low-voltage by the second mutual exclusion or door 301 is that electronegative potential surpasses 0.2 second, make the output voltage of this second time delay electronegative potential bolt-lock 302 can keep electronegative potential, by the 3rd anti-phase level converter 303, and then control the first power switch 41 disconnects with internal control low-tension supply VCC1, the first relay 33 cannot move, 331 pairs first contact (COM) 332 disconnections altogether of the first normal opened contact (NO) of the first relay 33, system high pressure power supply 31 paths are disconnected, cause load 32 to move.
When this low-voltage, controlling pin 338 and this low-voltage controls pin 347 and switches to the conversion instant electric potential of noble potential conversion electronegative potential or electronegative potential conversion noble potential when instantaneous, because of the first relay 33 and the second 34 switching times of relay, make the output voltage of the first mutual exclusion or door 391 and the output voltage of the second mutual exclusion or door 301 be all electronegative potential, in 0.2 second, the first relay 33 and the second 34 switching times of relay, the output voltage that makes the first mutual exclusion or door 391 output voltage and the second mutual exclusion or 301 all transition is noble potential, the output voltage of the first time delay electronegative potential bolt-lock 392 and the second time delay electronegative potential bolt-lock 302 is all noble potential, when the first power switch 41 and 42 couples of internal control low-tension supply VCC1 of second source switch disconnect a bit of time, and connected in 0.2 second, now capacitor 43, 44 use as buffered sources.
Design whereby; make first and second protection circuit units 39,30 can be mutual holding circuit; as controlling this internal control low-tension supply VCC1 power-off; to realize when single failure occurs double relay (i.e. the first relay 33, the second relay 34); can cut off the internal control low-tension supply VCC1 of another group, and then system high pressure power supply 31 also can be disconnected.
In sum, the utility model relay tip detecting fault system 2 designs by foregoing circuit, can detect at any time the first relay 33 or the second relay 34 whether abnormal inhale dead or welding occur, the situation that while avoiding occurring alert anxious situation, machinery but cannot emergent stopping, thereby more can contribute to reduce public security accident rate.
Claims (7)
1. a relay tip detecting fault system, is characterized in that: comprise:
A system high pressure power supply;
An internal control low-tension supply;
A load, is electrically connected to this system high pressure power supply;
First relay, there is first normal opened contact being electrically connected to this system high pressure power supply, one first contact, the first normally closed contact, a first coil contact and use and control pin with one first output of a control system and be electrically connected to altogether, and a second coil contact being electrically connected to this internal control low-tension supply;
Second relay, there is second normal opened contact being electrically connected to this load, the second common contact, second normally closed contact, a first coil contact being electrically connected to this internal control low-tension supply being electrically connected to this first common contact, and one is controlled with one second output of this control system the second coil contact that pin is electrically connected to;
A first control loop unit, comprise that one in order to produce oscillatory circuit, this oscillatory circuit of electrical connection of a string ripple signal and to process the amplifying circuit of this string ripple signal, a transformer that is electrically connected to this amplifying circuit in order to amplification, and first normally closed contact that is electrically connected to this transformer and this first relay is also used so that this string ripple signal rectification forms the diode of positive half-wave signal; And
A second control loop unit, comprise that one is electrically connected to the resistor of the second normally closed contact of this second relay, a photo-coupler that is electrically connected to this resistor, and an inverting integrator, this inverting integrator is electrically connected to an input control pin of this photo-coupler and this control system.
2. relay tip detecting fault system according to claim 1, is characterized in that: this relay tip detecting fault system also comprises a fuse being electrically connected between this system high pressure power supply and this load.
3. a relay tip detecting fault system, is characterized in that: comprise:
A system high pressure power supply;
An internal control low-tension supply;
A load, is electrically connected to this system high pressure power supply;
First relay, contact, first normally closed contact, first coil contact are used and are controlled pin with one first output of a control system and be electrically connected to, an and second coil contact being electrically connected to this internal control low-tension supply altogether to have first normal opened contact being electrically connected to this system high pressure power supply, one first;
Second relay, there is second normal opened contact being electrically connected to this load, the second common contact, second normally closed contact, a first coil contact being electrically connected to this internal control low-tension supply being electrically connected to this first common contact, and one is controlled with one second output of this control system the second coil contact that pin is electrically connected to;
A first control loop unit, comprise that one in order to produce the oscillatory circuit of a string ripple signal, an amplifying circuit that is electrically connected to this oscillatory circuit and processes this string ripple signal in order to amplify, a transformer that is electrically connected to this amplifying circuit, and a diode that is electrically connected to this transformer, this diode is also electrically connected to this first this second contact and with so that this string ripple signal rectification forms positive half-wave signal altogether of contact and this second relay altogether of this first relay; And
Two the second control loop unit, be electrically connected to respectively this first normally closed contact of this first relay, this second normally closed contact of this second relay, each second control loop unit comprises a resistor, a photo-coupler that is electrically connected to this resistor, an and inverting integrator that is electrically connected to this photo-coupler, respectively this resistor is electrically connected to respectively this first normally closed contact of this first relay, this second normally closed contact of this second relay, respectively this inverting integrator is also electrically connected to respectively a first input control pin and a second input control pin of this control system.
4. relay tip detecting fault system according to claim 3, is characterized in that: this relay tip detecting fault system also comprises a fuse being electrically connected between this system high pressure power supply and this load.
5. a relay tip detecting fault system, is characterized in that: comprise:
A system high pressure power supply;
An internal control low-tension supply;
A load, is electrically connected to this system high pressure power supply;
First relay, has first normal opened contact being electrically connected to this system high pressure power supply, a first common contact, first normally closed contact, a first coil contact, and a second coil contact being electrically connected to internal control low-tension supply;
Second relay, there is second normal opened contact being electrically connected to this load, the second common contact, second normally closed contact, a first coil contact being electrically connected to this internal control low-tension supply being electrically connected to this first common contact, and a second coil contact;
A first control loop unit, comprise that one in order to produce the oscillatory circuit of a string ripple signal, an amplifying circuit that is electrically connected to this oscillatory circuit and processes this string ripple signal in order to amplify, a transformer that is electrically connected to this amplifying circuit, and a diode that is electrically connected to this transformer, this diode is also electrically connected to this first this second contact and with so that this string ripple signal rectification forms positive half-wave signal altogether of contact and this second relay altogether of this first relay;
Two the second control loop unit, be electrically connected to respectively this first normally closed contact of this first relay, this second normally closed contact of this second relay, each second control loop unit comprises a resistor, a photo-coupler that is electrically connected to this resistor, an and inverting integrator that is electrically connected to this photo-coupler, respectively this resistor is electrically connected to respectively this first normally closed contact of this first relay, this second normally closed contact of this second relay, respectively this inverting integrator is also electrically connected to respectively a first input control pin and a second input control pin of this control system,
First power switch, is electrically connected to the second coil contact of this first relay;
A second source switch, is electrically connected to the first coil contact of this second relay;
One first protection circuit units, comprise first mutual exclusion or door, a first time delay electronegative potential bolt-lock that is electrically connected to this first mutual exclusion or door, a first anti-phase level converter that is electrically connected to this first time delay electronegative potential bolt-lock and this second source switch, an and second anti-phase level converter being electrically connected to this first coil contact of this first relay, one first output of this control system is controlled pin and is electrically connected to this second anti-phase level converter and this first mutual exclusion or door, the second input control pin of this control system is electrically connected to this first mutual exclusion or door, and
One second protection circuit units, comprise second mutual exclusion or door, a second time delay electronegative potential bolt-lock that is electrically connected to this second mutual exclusion or door, a the 3rd anti-phase level converter that is electrically connected to this second time delay electronegative potential bolt-lock and this first power switch, and a 4th anti-phase level converter being electrically connected to this second coil contact of this second relay, one second output of this control system is controlled pin and is electrically connected to the 4th anti-phase level converter and this second mutual exclusion or door, the first input control pin of this control system is electrically connected to this second mutual exclusion or door.
6. relay tip detecting fault system according to claim 5, is characterized in that: this relay tip detecting fault system also comprises a fuse being electrically connected between this system high pressure power supply and this load.
7. relay tip detecting fault system according to claim 6, it is characterized in that: this relay tip detecting fault system also includes two capacitors, be electrically connected to respectively this second coil contact of this first relay, this first coil contact of this second relay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320782974.0U CN203587768U (en) | 2013-12-02 | 2013-12-02 | Relay contact fault detection system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320782974.0U CN203587768U (en) | 2013-12-02 | 2013-12-02 | Relay contact fault detection system |
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| Publication Number | Publication Date |
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| CN203587768U true CN203587768U (en) | 2014-05-07 |
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| CN201320782974.0U Expired - Fee Related CN203587768U (en) | 2013-12-02 | 2013-12-02 | Relay contact fault detection system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113945836A (en) * | 2021-09-29 | 2022-01-18 | 龙口矿业集团有限公司 | Relay comprehensive utilization maintenance platform |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113945836A (en) * | 2021-09-29 | 2022-01-18 | 龙口矿业集团有限公司 | Relay comprehensive utilization maintenance platform |
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