CN2464697Y - Elevator safety check controller - Google Patents
Elevator safety check controller Download PDFInfo
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- CN2464697Y CN2464697Y CN 00227822 CN00227822U CN2464697Y CN 2464697 Y CN2464697 Y CN 2464697Y CN 00227822 CN00227822 CN 00227822 CN 00227822 U CN00227822 U CN 00227822U CN 2464697 Y CN2464697 Y CN 2464697Y
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Abstract
The utility model discloses a check controller for reinforcing elevator safety operation, which is composed of a multiplex level conversion circuit, a logic circuit, a switching circuit and a controlling relay, wherein, the multiplex input ends of the multiplex level conversion circuit are respectively input with multiplex contact signals to be checked, and the corresponding multiplex output ends of the multiplex level conversion circuit output logic signals which are respectively input into the multiplex input ends of the logic circuit so as to do logical operation. The output end of the logic circuit is connected with the input end of the switch circuit, and the output end of the switch circuit is connected with the controlling relay. If the contact signals to be checked are abnormal, the controlling relay begins to operate to stop the running of elevators and alarm people so as to avoid the occurrence of accidents.
Description
The utility model relates to a kind of detection controller that strengthens elevator safety operation.
What fault was maximum in the elevator is gate interlock control loop and band-type brake control loop, and in this two loop break down in any one loop, all can cause personnel casualty accidents.
In the past in the design-calculated loop, the gate interlock control loop is controlled with a contactless switch, still if contactless switch because of mechanical breakdown, or arcing causes that the contact burning is sticking, although this moment, elevator door left, computing machine is judged as elevator door, and oneself shuts, and starts the elevator operation then, if elevator door just in time clips the people, accident will cause casualties.If the gate interlock control loop adopts two contactless switchs to control, then safety factor is than adopting the much higher of a contactless switch.But, if the contact of one of them contactless switch is stuck, be difficult to be found for the moment, in case the contact of two contactless switchs all is stuck, too same accident can appear.
Another loop is the band-type brake control loop, similar with the gate interlock control loop, in design in the past, the band-type brake control loop is controlled with a contactless switch, improved mode is to adopt two contactless switchs to control, and is the same with the gate interlock control loop, even the band-type brake control loop that adopts two contactless switchs to control, still having may et out of order, causes elevator to slip the accident of car then.
The purpose of this utility model is in order to overcome the deficiencies in the prior art, proposes a kind of elevator safety and detects controller, in case the contact of contactless switch work mal, it can detect at once, sends control signal, stops elevator to start operation, and alarm.
The technical solution of the utility model is: this elevator safety detects controller and comprises the multichannel level shifting circuit, decision circuit, switch circuit and control relay.
Described multichannel level shifting circuit, have multi-channel input and corresponding multi-channel output, the multi-channel input of multichannel level shifting circuit is imported multichannel contact signal Vx1 to Vxn respectively, and corresponding multi-channel output exports that switching levels is the logical signal Ly1 to Lyn of the needs of adaptation logic circuit; Described multichannel contact signal Vx1 to Vxn is meant the contact signal more than two road or two tunnel, and in normal working conditions, move simultaneously these contacts, and is promptly closed simultaneously, disconnects simultaneously, and corresponding multichannel contact signal is consistent;
Described decision circuit, have multi-channel input and a mouth, the multi-channel input of decision circuit is connected with the multi-channel output of multichannel level shifting circuit respectively, and the multichannel logical signal Ly1 to Lyn from described multichannel level shifting circuit is carried out logic operation; The logical signal F of the mouth output of described decision circuit satisfies logical formula:
Wherein: Ly1Ly2 ... Lyn---from the multi-channel electric signal of described multichannel level shifting circuit output, promptly described logic
The multichannel logical signal of road input, high potential is a logical one, active potential is a logical zero;
The output logic signal of F---described decision circuit, high potential are logical one, and active potential is a logical zero;
That is to say: as long as the multichannel logical signal of described decision circuit input is identical, output logic signal is an active potential, as long as the multichannel logical signal of described decision circuit input has one the tunnel to be inequality, output logic signal is a high potential.
Described switch circuit is serially connected in after the described decision circuit, and the input end of switch circuit links to each other with the mouth of decision circuit, ends or conducting under the effect of the logic electric signal F that described decision circuit is exported;
Described control relay is connected with the mouth of described switch circuit, when the switch circuit conducting, starts described control relay action, stops elevator to start operation and alarm.
Described multichannel contact signal wherein has one the tunnel can be the contact signal that detects relay, the contact of described detection relay only be used for detecting and in normal working conditions and other examined contact move simultaneously.After being provided with the detection relay, only be used for detecting because detect the contact of relay, the electric current that passes through is less, be difficult for causing burning and glue, so, even other examined contact is simultaneously because mechanical reason or arcing and can't disconnect the time, the utility model also can detect.
Principle of work of the present utility model is: when examined a plurality of contacts are in normal working, the multichannel contact signal of input is consistent, contact signal is through multichannel level shifting circuit switching levels, the corresponding multi-channel electric signal of output is sent into decision circuit and is carried out logic operation, the logical signal of output is an active potential, the switch circuit that control is serially connected in after the decision circuit ends, and is failure to actuate the elevator normal operation with the mouth bonded assembly control relay of switch circuit; When examined a plurality of contacts have work abnormal, the multichannel contact signal of input is inconsistent, then contact signal is through multichannel level shifting circuit switching levels, the corresponding multi-channel electric signal of output is sent into decision circuit and is carried out logic operation, the logical signal of output is a high potential, control is serially connected in the switch circuit conducting after the decision circuit, and the mouth bonded assembly control relay action of promotion and switch circuit stops elevator operation and alarm.
After the utility model has been installed, in case examined multichannel contact signal is inconsistent, illustrate that then examined contact mode of operation must have abnormal, by the utility model examined contact signal is carried out logic operation, the utility model can detect at once, and the start-up control actuating of relay stops elevator to start operation, and alarm, thereby avoid the generation of accident.
Below in conjunction with the drawings and specific embodiments the utility model is described in further details.
Fig. 1 is the circuit block diagram that the utility model elevator safety detects controller
Fig. 2 is the physical circuit figure that elevator safety detects controller detecting gate interlocking contacts of contactor mode of operation
Fig. 3 is that elevator safety detects the physical circuit figure that controller detects band-type brake contacts of contactor mode of operation
The circuit block diagram of the utility model elevator safety detection controller comprises multichannel level shifting circuit 1, decision circuit 2, switch circuit 3, control relay AJK as shown in Figure 1.
Described multichannel level shifting circuit 1 has multi-channel input and corresponding multi-channel output, the multi-channel input of multichannel level shifting circuit 1 is imported multichannel contact signal Vx1 to Vxn respectively, and corresponding multi-channel output exports that switching levels is the logical signal Ly1 to Lyn of the needs of adaptation logic circuit 2;
Described multichannel contact signal Vx1 to Vxn is meant the contact signal more than two road or two tunnel, and in normal working conditions, move simultaneously these contacts, and is promptly closed simultaneously, disconnects simultaneously, and corresponding multichannel contact signal Vx1 to Vxn is consistent;
Described decision circuit 2 has multi-channel input and a mouth, the multi-channel input of decision circuit 2 is connected with the multi-channel output of multichannel level shifting circuit 1 respectively, and the multi-channel electric signal Ly1 to Lyn from described multichannel level shifting circuit 1 is carried out logic operation; The output logic signal F of described decision circuit 2 satisfies logical formula:
Wherein: Ly1Ly2 ... Lyn---from the multi-channel electric signal of described multichannel level shifting circuit 1 output, promptly described logic
The multichannel logical signal of circuit 2 inputs, high potential is a logical one, active potential is a logical zero;
F---the output logic signal of described decision circuit 2, high potential are logical one, and active potential is a logic
0；
That is to say: as long as the multichannel logical signal Ly1 of described decision circuit 2 inputs, Ly2 ... Lyn is identical, and output logic signal F is an active potential, the multichannel logical signal Ly1 of described decision circuit 2 inputs, Ly2 ... as long as Lyn has one the tunnel to be inequality, output logic signal F is a high potential;
Described switch circuit 3 is serially connected in after the described decision circuit 2, and the input end of switch circuit 3 links to each other with the mouth of decision circuit 2, ends or conducting under the effect of the logic electric signal F that described decision circuit 2 is exported;
Described control relay AJK is connected with the mouth of described switch circuit 3, when described switch circuit 3 conductings, starts described control relay AJK action, stops elevator to start also alarm of operation.
Described multichannel contact signal Vx1 to Vxn wherein has one the tunnel can be the contact signal that detects relay, the contact of described detection relay only be used for detecting and in normal working conditions and other examined contact move simultaneously.After being provided with the detection relay, only be used for detecting because detect the contact of relay, the electric current that passes through is less, be difficult for causing burning and glue, so, even other examined contact is simultaneously because mechanical reason or arcing and can't disconnect the time, the utility model also can detect.
Fig. 2 has provided the physical circuit figure of the gate interlock contacts of contactor mode of operation in elevator safety detection controller detecting gate interlocked control loop.
As shown in Figure 2, described multichannel level shifting circuit 1 is three road level shifting circuits, three input end X1 are arranged, X2, X3, comprise nine resistance R 1 to R9 and three aerotron N1, N2, N3, wherein one road level shifting circuit is by three resistance R 1, R4, R7 and an aerotron N1 form, and road contact signal Vx1 from one of them input end X1 is carried out level conversion, and an end of resistance R 1 links to each other with an input end X1, the other end links to each other with the base stage of aerotron N1, between the base stage of this aerotron N1 and the emitter and connect a resistance R 4, aerotron N1 grounded emitter, an end of the collecting electrode of aerotron N1 and a resistance R 7 links to each other, another termination+5V power supply of this resistance R 7, the collector output of aerotron N1 export one the tunnel can be for the level signal Ly1 of decision circuit 2 uses; Same connection mode, three resistance R 2 in addition, R5, R8 and an aerotron N2 constitute another road level shifting circuit, road contact signal Vx2 from another input end X2 is carried out level conversion, and the collector output of aerotron N2 is exported another road can be for the level signal Ly2 of decision circuit 2 uses; Three other again resistance R 3, R6, R9 and an aerotron N3 constitute one road level shifting circuit, and road contact signal Vx3 from another input end X3 is carried out level conversion, and the collector output of aerotron N3 exports one the tunnel can be for the level signal Ly3 of decision circuit 2 uses; In order to indicate and three input end X1 X2, the closure of three contacts that X3 links to each other, off-state, three input end X1 of described multichannel level shifting circuit 1, X2, X3 and three resistance R 1, R2, can also connect three LEDs 1 respectively between the R3, LED2, LED3, three LEDs 1, LED2, the anode of LED3 respectively with three input end X1, X2, X3 links to each other, three LEDs 1, LED2, the negative electrode of LED3 respectively with three resistance R 1, R2, R3 links to each other; Three input end X1 of described multichannel level shifting circuit 1, X2, X3, two input end X1 wherein, the contact DLR1 of X2 and two gate interlock contactless switchs, DLR2 link to each other, and another input end X3 links to each other with the contact JCZ1 of the detection relay that is in parallel with the gate interlock contactless switch.Two gate interlock contactless switch DLR1, DLR2 is the elevator safety standard-required, detecting relay J CZ1 needs to be provided with for detecting, two gate interlock contactless switch DLR1, DLR2 and a detection relay J CZ1 are in parallel at the gate interlock control loop, also be that they are switched on simultaneously, outage simultaneously, so these three contacts are consistent in normal operation, promptly closed simultaneously, disconnect simultaneously, after being provided with detection relay J KZ1, only be used for detecting because detect the contact of relay J CZ1, the electric current that passes through is less, is difficult for causing burning and glues, so, even two gate interlock contactless switch DLR1, the contact of DLR2 is simultaneously because mechanical reason or arcing and can't disconnect the time, the utility model also can detect.
As shown in Figure 2, by three resistance R 1, R4, R7 and aerotron N1 and LED 1 constitute one road level shifting circuit, contact signal Vx1 from the gate interlock contactless switch DLR1 of an input end X1 is carried out level conversion, working process is: when gate interlock contactless switch DLR1 does not move, corresponding contacts disconnects, input end X1 does not have signal voltage, LED 1 does not work, and the base stage of aerotron N1 is not because of there being signal voltage, and aerotron N1 ends, then collecting electrode output voltage Ly1 is a high level, and the counterlogic signal is 1; When gate interlock contactless switch DLR1 moves, the corresponding contacts closure, LED 1 is bright, power line voltage+24V is added to the base stage of aerotron N1 through resistance R 1 after the R4 dividing potential drop, aerotron N1 conducting, its collecting electrode output voltage Ly1 is a low level, and cooresponding logical signal is 0.As a same reason, by resistance R 2, R5, another road level shifting circuit that R8 and aerotron N2 and LED 2 constitute, contact signal Vx2 from the gate interlock contactless switch DLR2 of another input end X2 is carried out level conversion, output electric signal Ly2, the closure of the contact of LED 2 indication gate interlock contactless switch DLK2, off-state; By resistance R 3, R6, the road level shifting circuit that R9 and aerotron N3 and LED 3 constitute, contact signal Vx3 from the detection relay J CZ1 of another input end X3 is carried out level conversion, output electric signal Ly3, LED 3 indications detect the closure of the contact of relay J CZ1, off-state.By three road logical signal Ly1 of multichannel level shifting circuit 1 output, Ly2, Ly3 send into decision circuit 2.
As shown in Figure 2, described decision circuit 2 is by three three input nand gate Q1, Q2, Q3 and four not gate Q4, Q5, Q6, Q7 forms, three aerotron N1 of described multichannel level shifting circuit 1, N2, three tunnel level signal Ly1 of the collector output output of N3, Ly2, Ly3 is three input ends of input nand gate Q1 respectively, while this three tunnel level signal Ly1, Ly2, Ly3 are respectively through not gate Q4, Q5, after Q6 is anti-phase, distinguish three input ends of input nand gate Q2 again, the input end of the logical signal F1 input nand gate Q3 of NAND gate Q1 output, two input ends of the logical signal F2 input nand gate Q3 of NAND gate Q2 output, the logical signal F3 of NAND gate Q3 output output control switch circuit 3 through not gate Q7 is anti-phase after ends or the logical signal F of conducting.
According to the structure of decision circuit 2, its truth table can be derived by following logic operation formula:
Then truth table is:
| Ly1 | Ly2 | Ly3 | F1 | F2 | F3 | F |
| 0 | 0 | 0 | 1 | 0 | 1 | 0 |
| 0 | 0 | 1 | 1 | 1 | 0 | 1 |
| 0 | 1 | 0 | 1 | 1 | 0 | 1 |
| 0 | 1 | 1 | 1 | 1 | 0 | 1 |
| 1 | 0 | 0 | 1 | 1 | 0 | 1 |
| 1 | 0 | 1 | 1 | 1 | 0 | 1 |
| 1 | 1 | 0 | 1 | 1 | 0 | 1 |
| 1 | 1 | 1 | 0 | 1 | 1 | 0 |
Can draw thus, as the logical signal Ly1 of 2 three input end inputs of described decision circuit, Ly2, when Ly3 is identical, also be contact DLR1, DLR2, JCZ1 all is operated in normal condition, promptly or full adhesive, or discharge the output logic signal F=0 of decision circuit 2 entirely, be active potential, as three input logic signal Ly1 of described decision circuit, Ly2 is when Ly3 is incomplete same, also be contact DLR1, DLR2, among the JCZ1 one or two burn because of mechanical reason or arcing cause sticking, contact DLR1, DLR2, the state of JCZ1 is inconsistent, and the output logic signal F=1 of decision circuit 2 is high potential.
As shown in Figure 2, described switch circuit 3 is by resistance R 7, capacitor C 1, aerotron N4 forms, one end of resistance R 7 links to each other with the mouth of described decision circuit 2, and the other end links to each other with the base stage of aerotron N4, connects capacitor C 1 between the base stage of aerotron N4 and the ground, the grounded emitter of aerotron N4, the collecting electrode output switching signal.The end of described control relay AJK links to each other with the collecting electrode of aerotron N4, the other end links to each other with direct supply, described control relay AJK two ends diode D1 in parallel, the anode of diode D1 connects the collecting electrode of aerotron N4, and negative electrode links to each other with direct supply.Their principle of work is: the logical signal F of decision circuit 2 outputs is through the base stage of resistance R 7 input aerotron N4, work as F=0, be contact DLR1, DLR2, JCZ1 all is operated in normal condition, aerotron N4 ends and aerotron N4 collecting electrode bonded assembly control relay AJK is failure to actuate, and elevator normally moves.Work as F=1, i.e. contact DLR1, DLR2; one or two among the JCZ1 breaks down, and the base stage of aerotron N4 obtains high potential and conducting, drives and aerotron N4 collecting electrode bonded assembly control relay AJK action; AJK has two often to open and two normally closed contacts, and normally closed contact disconnects, and cuts off converter power supply contactless switch loop; contactless switch is disconnected, and frequency converter is not worked, simultaneously the open contact closure; alarm on the one hand; feed signals is given computer on the one hand, makes computer send halt instruction, and elevator is out of service.At this moment, just can resume work after having only artificial trouble-shooting.Thereby avoided the generation of accident.
Shown in Figure 3 is that elevator safety detects the physical circuit figure that controller detects band-type brake contacts of contactor mode of operation.Three input end X1 of described multichannel level shifting circuit 1, X2, X3, two input end X1 wherein, the contact R UN1 of X2 and two band-type brake contactless switchs, RUN2 link to each other, and another input end X3 links to each other with the contact JCZ2 of the detection relay that is in parallel with the band-type brake contactless switch.The principle of work that elevator safety shown in Figure 3 detects controller detection band-type brake contacts of contactor mode of operation is the same with the principle of work that elevator safety shown in Figure 2 detects the circuit diagram of controller detecting gate interlocking contacts of contactor mode of operation, no longer repeats herein.
Two cover elevator safeties as shown in Figures 2 and 3 have been installed have been detected controller, just can the gate interlock loop and the brake loop of elevator be detected, in case any one loop or this two equal et out of orders in loop in these two loops, elevator safety detects controller and can both detect at once, sends control signal, directly cut off converter power supply, alarm, subsequent signal is given computing machine, makes computer send halt instruction, thereby make elevator out of service, avoid the generation of accident.
Whether this elevator safety can also to be used to detect the contact work of other contactless switch normal if detecting controller.
Claims (9)
1. an elevator safety detects controller, it is characterized in that: comprising: multichannel level shifting circuit (1), decision circuit (2), switch circuit (3), control relay (MK);
Multichannel level shifting circuit (1), have multi-channel input and corresponding multi-channel output, the multi-channel input of multichannel level shifting circuit (1) is imported multichannel contact signal (Vx1 to Vxn) respectively, corresponding multi-channel output output multichannel logical signal Ly1 to Lyn;
Decision circuit (2) has multi-channel input and a mouth, and the multi-channel input of decision circuit (2) is connected with the multi-channel output of multichannel level shifting circuit (1) respectively, and logical formula is satisfied in the mouth output of decision circuit (2):
Output logic signal F;
Switch circuit (3) is serially connected in described decision circuit (2) afterwards, and the input end of switch circuit (3) links to each other with the mouth of decision circuit (2);
Control relay (AJK) is connected with the mouth of described switch circuit (3).
2. detection controller according to claim 1, it is characterized in that, described multichannel contact signal (Vx1 to Vxn), wherein have one the tunnel to be the contact signal that detects relay, the contact of described detection relay only be used for detecting and in normal working conditions and other examined contact move simultaneously.
3. detection controller according to claim 1, it is characterized in that, described multichannel level shifting circuit (1) is three road level shifting circuits, three input end (X1 are arranged, X2, X3), comprise nine resistance (R1 to R9) and three aerotron (N1, N2, N3), wherein (R1, R4 R7) form with an aerotron (N1) one road level shifting circuit by three resistance, road contact signal (Vx1) from one of them input end (X1) is carried out level conversion, one end of resistance (R1) links to each other with an input end (X1), and the other end links to each other with the base stage of aerotron (N1), between base stage of this aerotron (N1) and the emitter and connect a resistance (R4), aerotron (N1) grounded emitter, the collecting electrode of aerotron (N1) links to each other with an end of a resistance (R7), and another termination+5V power supply of this resistance (R7), the collector output of aerotron (N1) export one the tunnel can be for the level signal (Lv1) of decision circuit (2) use; Same connection mode, three resistance (R2 in addition, R5, R8) and an aerotron (N2) constitute another road level shifting circuit, road contact signal (Vx2) from another input end (X2) is carried out level conversion, and the collector output of aerotron (N2) is exported another road can be for the level signal (Ly2) of decision circuit (2) use; Three other again resistance (R3, R6, R9) and an aerotron (N3) constitute one road level shifting circuit, road contact signal (Vx3) from another input end (X3) is carried out level conversion, and the collector output of aerotron (N3) exports one the tunnel can be for the level signal (Ly3) of decision circuit (2) use.
4. detection controller according to claim 3 is characterized in that, three input end (X1 of described multichannel level shifting circuit (1), X2, X3) and three resistance (R1, R2 can also connect three light-emitting diode (LED1 respectively between R3), LED2, LED3), three light-emitting diodes (LED1, LED2, LED3) anode respectively with three input end (X1, X2 X3) links to each other three light-emitting diode (LED1, LED2, LED3) (R1, R2's negative electrode R3) link to each other with three resistance respectively, be used to indicate the closure of the contact that links to each other with input end, off-state.
5. according to claim 3 or 4 described detection controllers, it is characterized in that, three input end (X1 of described multichannel level shifting circuit (1), X2, X3), wherein two input ends (X1, X2) and the contact (DLR1 of two gate interlock contactless switchs, DLR2) link to each other, another input end (X3) links to each other with the contact (JCZ1) of the detection relay that is in parallel with the gate interlock contactless switch.
6. according to claim 3 or 4 described detection controllers, it is characterized in that, three input end (X1 of described multichannel level shifting circuit (1), X2, X3), wherein two input ends (X1, X2) and the contact (RUN1 of two band-type brake contactless switchs, RUN2) link to each other, another input end (X3) links to each other with the contact (JCZ2) of the detection relay that is in parallel with the band-type brake contactless switch.
7. detection controller according to claim 1, it is characterized in that, described decision circuit (2) is by three three input nand gate (Q1, Q2, Q3) and four not gate (Q4, Q5, Q6, Q7) form three aerotrons (N1, N2 of described multichannel level shifting circuit (1), three tunnel level signal (Ly1 of collector output output N3), Ly2, Ly3) three input ends of difference input nand gate (Q1), this three tunnel level signal (Ly1 simultaneously, Ly2, Ly3) respectively through not gate (Q4, Q5, Q6) anti-phase after, distinguish three input ends of input nand gate (Q2) again, an input end of logical signal (F1) input nand gate (Q3) of NAND gate (Q1) output, two input ends of logical signal (F2) input nand gate (Q3) of NAND gate (Q2) output, the logical signal (F3) of NAND gate (Q3) output output control switch circuit (3) through not gate (Q7) is anti-phase after end or the logical signal (F) of conducting.
8. detection controller according to claim 1, it is characterized in that, described switch circuit (3) is by resistance (R7), electric capacity (C1), aerotron (N4) is formed, and an end of resistance (R7) links to each other with the mouth of described decision circuit (2), the other end links to each other with the base stage of aerotron (N4), connect electric capacity (C1) between the base stage of aerotron (N4) and the ground, the grounded emitter of aerotron (N4), collecting electrode output switching signal.
9. detection controller according to claim 1, it is characterized in that, one end of described control relay (AJK) links to each other with the collecting electrode of aerotron (N4), the other end links to each other with direct supply, described control relay (AJK) two ends diode (D1) in parallel, the anode of diode (D1) connects the collecting electrode of aerotron (N4), and negative electrode links to each other with direct supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00227822 CN2464697Y (en) | 2000-04-11 | 2000-04-11 | Elevator safety check controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00227822 CN2464697Y (en) | 2000-04-11 | 2000-04-11 | Elevator safety check controller |
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| Publication Number | Publication Date |
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| CN2464697Y true CN2464697Y (en) | 2001-12-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00227822 Expired - Fee Related CN2464697Y (en) | 2000-04-11 | 2000-04-11 | Elevator safety check controller |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100455501C (en) * | 2004-02-26 | 2009-01-28 | 三菱电机株式会社 | Sefety device of elevator and its operation testing method |
| CN104192664A (en) * | 2014-08-07 | 2014-12-10 | 江苏蒙哥马利电梯有限公司 | Safety protective device for elevator door lock loop |
| CN105793182A (en) * | 2013-11-28 | 2016-07-20 | 株式会社日立制作所 | Elevator safety system |
| CN106526477A (en) * | 2016-12-29 | 2017-03-22 | 重庆市渝展电气有限公司 | Multi-path switch state monitoring circuit |
| CN113526287A (en) * | 2021-08-05 | 2021-10-22 | 广东卓梅尼技术股份有限公司 | Electronic safety control module of elevator device |
-
2000
- 2000-04-11 CN CN 00227822 patent/CN2464697Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100455501C (en) * | 2004-02-26 | 2009-01-28 | 三菱电机株式会社 | Sefety device of elevator and its operation testing method |
| CN105793182A (en) * | 2013-11-28 | 2016-07-20 | 株式会社日立制作所 | Elevator safety system |
| CN105793182B (en) * | 2013-11-28 | 2018-04-24 | 株式会社日立制作所 | The security system of elevator |
| CN104192664A (en) * | 2014-08-07 | 2014-12-10 | 江苏蒙哥马利电梯有限公司 | Safety protective device for elevator door lock loop |
| CN106526477A (en) * | 2016-12-29 | 2017-03-22 | 重庆市渝展电气有限公司 | Multi-path switch state monitoring circuit |
| CN106526477B (en) * | 2016-12-29 | 2023-05-12 | 重庆市渝展电气有限公司 | Multi-way switch state monitoring circuit |
| CN113526287A (en) * | 2021-08-05 | 2021-10-22 | 广东卓梅尼技术股份有限公司 | Electronic safety control module of elevator device |
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