CN104803251B - The detection method and system of elevator malfunction - Google Patents
The detection method and system of elevator malfunction Download PDFInfo
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- CN104803251B CN104803251B CN201510232355.8A CN201510232355A CN104803251B CN 104803251 B CN104803251 B CN 104803251B CN 201510232355 A CN201510232355 A CN 201510232355A CN 104803251 B CN104803251 B CN 104803251B
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
- B66B5/02—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions
- B66B5/021—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions the abnormal operating conditions being independent of the system
- B66B5/024—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions the abnormal operating conditions being independent of the system where the abnormal operating condition is caused by an accident, e.g. fire
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B3/00—Applications of devices for indicating or signalling operating conditions of elevators
- B66B3/002—Indicators
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- Selective Calling Equipment (AREA)
- Maintenance And Inspection Apparatuses For Elevators (AREA)
- Indicating And Signalling Devices For Elevators (AREA)
- Elevator Control (AREA)
Abstract
The invention provides a kind of detection method of elevator malfunction and system.In embodiments of the present invention, according to the logical combination between the multiple detection signals for elevator exported from electric life controller, to detect whether the elevator is in oppressive state, wherein, the detection signal includes：Manned signal, door lock signal, fault-signal and maintenance signal；When it is determined that being in oppressive state, corresponding alarm signal is sent.The present invention can effectively solve the problem that the problem of elevator malfunction erroneous judgement.
Description
Technical field
The present invention relates to the detection method and system of detection technique, more particularly to elevator malfunction.
Background technology
Be typically provided with emergency call button on key panel in elevator, for when elevator occur it is abnormal when, terraced institute of powering
Personnel's call outside monitoring personnel of carrying, in the hope of the means of help.This is also the current conventional means for solving elevator malfunction.
However, many people and not knowing or emergency call button dare not be pressed；Or when people are in nervous and panic states
When, it can forget to press emergency call button；Also or, when emergency call button failure, outside monitoring can not be all notified in time
Personnel.
In order to solve the above problems, existing way be increase in escalator in detecting elevator whether the biography of someone
Sensor (such as infrared sensor).Although increase this kind of sensor can actively obtain in elevator whether the detection signal of someone,
But also there is following drawback：
1) security of elevator is influenceed, it is necessary to newly increase sensor on existing elevator, may be to existing stabilization
Electric wiring has an impact and installs complexity.
2) cost is higher, and the higher sensor of precision is expensive, it is difficult to promotes.
Therefore, it is necessary to be improved to the solution of existing elevator malfunction.
The content of the invention
It is of the prior art for solving it is an object of the invention to provide a kind of detection method of elevator malfunction and system
The problem of can not realize neither increases the electrical equipment of existing elevator, and and can automatic detection finds elevator malfunction.
In order to solve the above technical problems, embodiments of the present invention provide a kind of detection method of elevator malfunction, comprising：
It is described to detect according to the logical combination between the multiple detection signals for an elevator exported from electric life controller
Whether elevator is in oppressive state, wherein, the detection signal includes：Manned signal, door lock signal, fault-signal and maintenance letter
Number；When it is determined that being in oppressive state, corresponding alarm signal is sent.
Based on above-mentioned purpose, another embodiment of the invention provides a kind of detecting system of elevator malfunction, comprising：Inspection
Module is surveyed, for according to the logical groups between the multiple detection signals for an elevator exported from electric life controller
Close, to detect whether the elevator is in oppressive state, wherein, the detection signal includes：Manned signal, door lock signal, event
Hinder signal and maintenance signal；Alarm modules, for when it is determined that being in oppressive state, sending corresponding alarm signal.
Embodiment of the present invention in terms of existing technologies, by detecting manned signal, believe on door lock by lock signal, failure
Number and maintenance signal come determine in elevator whether someone, the problem of can effectively solve the problem that elevator malfunction erroneous judgement.
In addition, it is determined that the time that the elevator is in oppressive state exceeds default time threshold, then send corresponding
Alarm signal.Artificial maloperation can be prevented and cause the of short duration abnormal situation of elevator to occur.
In addition, when detecting that the detection elevator occurs/is not in oppressive state and changes, by current detection knot
Fruit is preserved, and determines whether alarm according to the testing result preserved.Be able to ensure that electric life controller occur power-off it is abnormal,
Or detection signal be when can not send, still can determine in elevator whether someone, and then alarm accurately and timely.
In addition, using the Dai Menqu signals, door lock signal, and the testing result preserved carries out logical combination and obtained
To manned signal, and the Dai Menqu signals are utilized, in door lock signal, and full signal, overload signal, command signal
At least one carries out logical combination and obtains manned signal, makes full use of the detection signal that electric life controller is provided to detect electricity
In ladder whether someone, and then help detect whether elevator is in oppressive state.Thus, it is possible to accurately, timely be in tired in elevator
Alarm is sent during people's state.
Brief description of the drawings
Fig. 1 is the flow chart of the detection method of the elevator malfunction of the first embodiment of the present invention.
Fig. 2 is the level logic schematic diagram that Dai Menqu signals are obtained in the present invention.
Fig. 3 is the level logic schematic diagram that manned signal is determined in the present invention.
Fig. 4 is to determine that elevator is in the level logic schematic diagram of oppressive state in the present invention.
Fig. 5 is the another level logic schematic diagram for determining manned signal in the present invention.
Fig. 6 is the detecting system structural representation of the elevator malfunction of third embodiment of the present invention.
Embodiment
To make the object, technical solutions and advantages of the present invention clearer, each reality below in conjunction with accompanying drawing to the present invention
The mode of applying is explained in detail.However, it will be understood by those skilled in the art that in each embodiment of the present invention,
In order that reader more fully understands the application and proposes many ins and outs.But even if without these ins and outs and base
Many variations and modification in following embodiment, each claim of the application technical side claimed can also be realized
Case.
As shown in figure 1, the first embodiment of the present invention is related to a kind of detection method of elevator malfunction.The detection method
Mainly performed by detecting system.Wherein, the detecting system is connected with electric life controller, in the electric life controller and building
Elevator correspond, each electric life controller can obtain all kinds of detection signals of corresponding elevator, and according to acquired inspection
Signal is surveyed to be controlled corresponding elevator.The electric life controller can also obtain all kinds of detection signals of each elevator in building.
For example, the electric life controller obtains elevator A maintenance home position signal, then elevator A is controlled to forbid responding each floor in building
On give an order.
The detecting system can obtain default or whole detection signal from the electric life controller, to carry out
The detection of elevator malfunction.
In step sl, the detecting system is according to the multiple inspections for an elevator exported from electric life controller
The logical combination surveyed between signal, to detect whether the elevator is in oppressive state, wherein, the detection signal includes：Carry
People's signal, door lock signal, fault-signal and maintenance signal.The manned signal includes：Full signal, overload signal, instruction letter
At least one of number.Wherein, the command signal refers in the set of at least one of call signal and floor selection signal
Give set, and the signal resetted when the call signal and the whole reset of floor selection signal.Wherein, the call signal is
Refer to user and press signal caused by the call button of elevator.The floor selection signal refers to floor choosing of the user in elevator
Select when a destination is selected on panel, press signal caused by number of floor levels button.
Preferably, the detection signal also includes Dai Menqu signals, enabling signal, elevator run signal.Wherein, the generation
Door area signal is used to represent that elevator is located at the signal exported during the position for the on-board and off-board that match, are available for floor.The generation door
Area's signal can directly be obtained by the electric life controller, can also according to enabling signal that the electric life controller is exported and
The logical combination of elevator run signal obtains the Dai Menqu signals.
For example, as shown in Fig. 2 the detecting system receives the enabling signal from the electric life controller by being set to again
The level change process of position, and the elevator run signal received is by resetting to the level change process of set, the then detection
System determines that the elevator is located at the Dai Menqu signals in door area and put since when enabling signal set and elevator run signal reset
Position, until being resetted when enabling signal reset and elevator run signal set.
Corresponding, the detecting system can utilize at least one in the full signal, overload signal, command signal
Kind, and the Dai Menqu signals and the logical combination of door lock signal and obtain the manned signal.
For example, the detecting system receives command signal, door lock signal, Dai Menqu signals, as shown in figure 3, then working as institute
State command signal set (floor signal that target arrival e.g., is shown in elevator), door lock signal set (i.e. door lock is locked), generation
When door area signal resets (i.e. elevator Bu Men areas), the detecting system determines manned home position signal (i.e. someone in elevator), directly
Resetted to the door lock signal and Dai Men areas home position signal just determines that the manned signal resets.
Specifically, multiple detection signals of elevator are actively sent to the detecting system by the electric life controller；Or
The detecting system timing sends detection signal acquisition request to the electric life controller, and the electric life controller will be monitored
Each detection signal feed back to the detecting system.
Wherein, each detection signal is the level signal of simulation, then the detecting system will correspond to the use of an elevator
In representing manned signal, door lock signal, fault-signal and the level signal progress logical combination for overhauling signal, if meeting elevator hair
Raw oppressive situation, then perform step S2, conversely, then illustrating that elevator either normal operation or is not in oppressive state, not
Perform step S2.
For example, as shown in Figure 4.Manned home position signal, the fault-signal that the detecting system receives an elevator B1 are put
When position (break down) and maintenance signal are resetted (i.e. in auto state), detect the elevator B1 and meet that appearance is oppressive to patrol
Combination is collected, then step S2 is performed, conversely, then continuing to monitor.
In step s 2, the detecting system sends corresponding alarm signal when it is determined that being in oppressive state.
Here, the alarm signal includes but is not limited to：Audible and visible alarm, maintenance is informed in a manner of short message/emergency call
Personnel etc..
Preferably, the detecting system is when it is determined that the elevator is in oppressive state, incessantly or according to default
The continuous signal an alert of time interval, until receiving the message of personnel's confirmation, just stop alarm signal.
For example, the detecting system is provided with ACK button, when it is determined that the elevator is in oppressive state, sent out every 5 seconds
An audible and visible alarm is sent, until someone presses the ACK button, the detecting system presses letter according to the ACK button
Number stop audible and visible alarm.
It is further preferable that the detecting system it is determined that the time that the elevator is in oppressive state exceed the default time
Threshold value, then send corresponding alarm signal.Wherein, the time threshold is exemplified as：10s.
As second embodiment, unlike embodiment one, there are the feelings powered off particular for electric life controller
Condition, the detection method also include：When the manned signal changes, the detecting system is by corresponding in the elevator
Whether the information of someone is preserved.
Specifically, the manned signal that electric life controller described in the detecting system real-time reception is provided, when described manned
When saltus step occurs for the level of signal, according to the direction of hopping edge, by whether the information of someone is saved in the corresponding elevator
In non-volatile memory (such as flash storage).It is wherein, described that whether the information of someone can be someone mark
Position.
For example, when the manned signal by low transition into high level when, the detecting system is according to upper jump now
Along flag bit in memory is changed into 1 by 0, to represent someone in elevator B3.When the manned signal is changed into low electricity from high level
Usually, the flag bit in the memory is become 0 by the detecting system according to lower jump edge now by 1, to represent elevator B3
In nobody.
Whether it should be noted that being preserved in a manner of preserving flag bit in elevator citing is also only in the way of someone,
Rather than limitation of the present invention.In fact, can also directly be preserved in the memory in elevator whether the text information of someone.
Wherein, the detecting system can also utilize the Dai Menqu signals, door lock signal, and the electricity preserved
Whether the information of someone carries out logical combination and obtains the manned signal in ladder.
For example, as shown in figure 5, when to work as preserved flag be 1 (i.e. someone in elevator), the detecting system determines institute
Manned home position signal (i.e. someone in elevator) is stated, until the door lock signal resets (i.e. door lock disconnects) and Dai Menqu signals are put
Position (i.e. elevator is in Men Qu) just determines that the manned signal resets.
In this way, when powering-off state occurs for the electric life controller, the detecting system can not obtain any detection signal.
So detecting system moment monitor the electric life controller whether Power resumption.When the electric life controller restores electricity
When, the detecting system can according to preserved whether someone information and the electric life controller energization after provided
Each detection signal logical combination, determine whether the elevator is in oppressive state.
Specifically, when the electric life controller powers off, and restores electricity again, the electric life controller it is inevitable to
The detecting system exports current detection signal.Now, the detecting system can according to preserved whether the letter of someone
Cease and combine current each detection signal to determine whether to perform step S2.
For example, detecting system testing result for being preserved before electric life controller power-off is someone in elevator
In, i.e., described manned home position signal.In the electric life controller Power resumption, door lock signal set (the i.e. door lock that is exported
Closure), fault-signal set (breaking down) and maintenance signal reset (i.e. in auto state), then the detecting system
Determine that the manned signal, door lock signal, fault-signal and maintenance signal meet default oppressive logic, perform step S2.
And for example, the testing result that the detecting system is preserved before electric life controller power-off is someone in elevator
In, i.e., described manned home position signal.In the electric life controller Power resumption, door lock signal set (the i.e. door lock that is exported
Closure), fault-signal reset (not breaking down) and maintenance signal reset (i.e. in auto state), then it is described detection be
System determines that the manned signal, door lock signal, fault-signal and maintenance signal do not meet default oppressive logic, not performs step
Rapid S2.
As shown in fig. 6, third embodiment of the present invention is related to a kind of detecting system of elevator malfunction.The detecting system
1 is connected with electric life controller, and the electric life controller can obtain all kinds of detection signals of each elevator in building, and according to being obtained
The detection signal taken is controlled to corresponding elevator.For example, the electric life controller obtains elevator A maintenance home position signal, then
Control elevator A forbid respond building in each floor on give an order.
The detecting system 1 includes：Detection module 11 and alarm modules 12.
The detection module 11 can obtain default or whole detection signal from the electric life controller, to enter
The detection of row elevator malfunction.
Specifically, the detection module 11 be used for according to from electric life controller exported for the multiple of elevator
Logical combination between detection signal, to detect whether the elevator is in oppressive state, wherein, the detection signal includes：
Manned signal, door lock signal, fault-signal and maintenance signal.The manned signal includes：Full signal, overload signal, instruction
At least one of signal.Wherein, the command signal refers in the set of at least one of call signal and floor selection signal
When give set, and the signal resetted when the call signal and floor selection signal all reset.Wherein, the call signal
Refer to that user presses signal caused by the call button of elevator.The floor selection signal refers to floor of the user in elevator
When a destination is selected on Selection Floater, signal caused by number of floor levels button is pressed.
Preferably, the detection signal also includes Dai Menqu signals, enabling signal, elevator run signal.Wherein, the generation
Door area signal is used to represent that elevator is located at the signal exported during the position for the on-board and off-board that match, are available for floor.The generation door
Area's signal can directly be obtained by the electric life controller, can also according to enabling signal that the electric life controller is exported and
The logical combination of elevator run signal obtains the Dai Menqu signals.
For example, as shown in Fig. 2 the detection module 11 receives the enabling signal from the electric life controller by being set to
The level change process of reset, and the elevator run signal received is by resetting to the level change process of set, the then inspection
Survey module 11 and determine that the elevator be located at the Dai Menqu signals in door area from being opened when enabling signal set and the reset of elevator run signal
Beginning set, until being resetted when enabling signal reset and elevator run signal set.
Corresponding, the detection module 11 can utilize at least one in the full signal, overload signal, command signal
Kind, and the Dai Menqu signals and the logical combination of door lock signal and obtain the manned signal.
For example, the detection module 11 receives command signal, door lock signal, Dai Menqu signals, as shown in figure 3, then when
The command signal set (floor signal that target arrival e.g., is shown in elevator), door lock signal set (i.e. door lock is locked),
When Dai Menqu signals reset (i.e. elevator Bu Men areas), the detection module 11 determines that manned home position signal (has in elevator
People), until the door lock signal resets and Dai Men areas home position signal just determines that the manned signal resets.
Specifically, multiple detection signals of elevator are actively sent to the detection module 11 by the electric life controller；Or
Person, the timing of detection module 11 send detection signal acquisition request to the electric life controller, and the electric life controller will
Each detection signal monitored feeds back to the detection module 11.
Wherein, each detection signal is the level signal of simulation, then the detection module 11 is by a corresponding elevator
For representing manned signal, door lock signal, fault-signal and the level signal progress logical combination for overhauling signal, if meeting elevator
Oppressive situation occurs, then performs the alarm modules 12, conversely, then illustrating that elevator either normal operation or is not in being stranded
People's state, not perform the alarm modules 12.
For example, as shown in Figure 4.The detection module 11 receives an elevator B1 manned home position signal, fault-signal
When set (break down) and maintenance signal are resetted (i.e. in auto state), detecting the elevator B1, to meet appearance oppressive
Logical combination, then the alarm modules 12 are performed, conversely, then continuing to monitor.
The alarm modules 12 are used for when it is determined that being in oppressive state, send corresponding alarm signal.
Here, the alarm signal includes but is not limited to：Audible and visible alarm, maintenance is informed in a manner of short message/emergency call
Personnel etc..
Preferably, the alarm modules 12 are when it is determined that the elevator is in oppressive state, incessantly or according to pre-
If the continuous signal an alert of time interval, until receiving the message of personnel's confirmation, just stop alarm signal.
For example, the alarm modules 12 are provided with ACK button, when it is determined that the elevator is in oppressive state, every 5 seconds
An audible and visible alarm is sent, until someone presses the ACK button, the pressing according to the ACK button of alarm modules 12
Lower signal stops audible and visible alarm.
It is further preferable that the alarm modules 12 are when it is determined that the time that the elevator is in oppressive state exceeds default
Between threshold value, then send corresponding alarm signal.Wherein, the time threshold is exemplified as：10s.
As the 4th kind of embodiment, unlike embodiment three, occur what is powered off particular for electric life controller
Situation, the detection module 11 are additionally operable to when the manned signal changes, detecting system electricity by corresponding to
Whether the information of someone is preserved in ladder.
Specifically, the manned signal that electric life controller described in the real-time reception of detection module 11 is provided, when the load
When saltus step occurs for the level of people's signal, according to the direction of hopping edge, by whether the information of someone preserves in the corresponding elevator
Into non-volatile memory (such as flash storage).It is wherein, described that whether the information of someone can be someone mark
Position.
For example, when the manned signal by low transition into high level when, the detection module 11 is upper according to now
Jump along flag bit in memory is changed into 1 by 0, to represent someone in elevator B3.When the manned signal is changed into low from high level
During level, the flag bit in the memory is become 0 by the detection module 11 according to lower jump edge now by 1, to represent electricity
In terraced B3 nobody.
Whether it should be noted that being preserved in a manner of preserving flag bit in elevator citing is also only in the way of someone,
Rather than limitation of the present invention.In fact, can also directly be preserved in the memory in elevator whether the text information of someone.
Wherein, the detection module 11 can also utilize the Dai Menqu signals, door lock signal, and be preserved described
Whether the information of someone carries out logical combination and obtains the manned signal in elevator.
For example, as shown in figure 5, when to work as preserved flag be 1 (i.e. someone in elevator), the detection module 11 determines
The manned home position signal (i.e. someone in elevator), until the door lock signal resets (i.e. door lock disconnects) and Dai Menqu signals
Set (i.e. elevator is in Men Qu) just determines that the manned signal resets.
In this way, when powering-off state occurs for the electric life controller, the detection module 11 can not obtain any detection letter
Number.So moment of detection module 11 monitor the electric life controller whether Power resumption.When the electric life controller recovers
During power supply, the detection module 11 can according to preserved whether someone information and the electric life controller energization after
The logical combination of each detection signal provided, determines whether the elevator is in oppressive state.Specifically, when the elevator control
Device processed powers off, and when restoring electricity again, the electric life controller is inevitable to export current inspection to the detection module 11
Survey signal.Now, the detection module 11 can according to preserved whether someone information and combine current each detection and believe
Number determine whether to perform the alarm modules 12.
For example, the detection module 11 testing result for being preserved before electric life controller power-off is someone in elevator
In, i.e., described manned home position signal.In the electric life controller Power resumption, door lock signal set (the i.e. door lock that is exported
Closure), fault-signal set (breaking down) and maintenance signal reset (i.e. in auto state), then the detection module
11 determine that the manned signal, door lock signal, fault-signal and maintenance signal meet default oppressive logic, perform the police
Report module 12.
And for example, the testing result that the detection module 11 is preserved before electric life controller power-off is someone in elevator
In, i.e., described manned home position signal.In the electric life controller Power resumption, door lock signal set (the i.e. door lock that is exported
Closure), fault-signal resets (not breaking down) and maintenance signal reset is (i.e. in auto state), then the detection mould
Block 11 determines that the manned signal, door lock signal, fault-signal and maintenance signal do not meet default oppressive logic, not performs
The alarm modules 12.
It is noted that each module and unit involved in present embodiment is logic module and logic list
Member, in actual applications, a logic unit can be a parts for a physical location or a physical location,
It can also be realized with the combination of multiple physical locations.In addition, in order to protrude the innovative part of the present invention, in present embodiment not
Have and introduce the unit less close with solving technical problem relation proposed by the invention, but this is not intended that present embodiment
In other units are not present.
It will be understood by those skilled in the art that the respective embodiments described above are to realize the specific embodiment of the present invention,
And in actual applications, can to it, various changes can be made in the form and details, without departing from the spirit and scope of the present invention.
Claims (6)
1. a kind of detection method of elevator malfunction, it is characterised in that include：
According to the logical combination between the multiple detection signals for an elevator exported from electric life controller, to detect
Whether the elevator is in oppressive state, wherein, the detection signal includes：Manned signal, door lock signal, fault-signal and inspection
Repair signal；
When it is determined that being in oppressive state, signal an alert；
Wherein, the manned signal obtains in the following manner：
Using at least one of full signal, overload signal, command signal, and Dai Menqu signals and door lock signal, carry out
Obtained from logical combination；
When the manned signal changes, by whether the information of someone is preserved in the corresponding elevator；
Wherein, when the electric life controller occurs to power off and restore electricity again, the manned signal is also in the following manner
Obtain：
Using Dai Menqu signals, door lock signal, and preserved whether someone information carry out logical combination obtained from.
2. the detection method of elevator malfunction according to claim 1, it is characterised in that described it is determined that being in oppressive state
When, the mode of signal an alert includes：It is determined that the time that the elevator is in oppressive state exceed default time threshold,
Then signal an alert.
3. the detection method of elevator malfunction according to claim 1, it is characterised in that the Dai Menqu signals is according to institutes
State the signal that the logical combination of enabling signal that electric life controller exported and elevator run signal obtains.
4. the detection method of elevator malfunction according to claim 1, it is characterised in that also include：Monitor the elevator control
Whether device processed powers off, and after energization is monitored, according to preserved whether someone information and lead in the electric life controller
The logical combination of each detection signal provided after electricity, determines whether the elevator is in oppressive state.
5. a kind of detecting system of elevator malfunction, it is characterised in that include：
Detection module, for according to patrolling between the multiple detection signals for an elevator exported from electric life controller
Combination is collected, to detect whether the elevator is in oppressive state, wherein, the detection signal includes：Manned signal, door lock letter
Number, fault-signal and maintenance signal；
Alarm modules, for when it is determined that being in oppressive state, signal an alert；
Wherein, the detection signal also includes Dai Menqu signals；
The detection module is additionally operable to utilize at least one of full signal, overload signal, command signal, and the generation door
Area's signal and door lock signal carry out logical combination and obtain the manned signal；
The detection module is additionally operable to when the manned signal changes, by the corresponding elevator whether the letter of someone
Breath is preserved；
The detection module is additionally operable to, when the electric life controller occurs to power off and restore electricity again, using Dai Menqu believe
Number, door lock signal, and preserved whether someone information carry out logical combination and obtain the manned signal.
6. the detecting system of elevator malfunction according to claim 5, it is characterised in that the detection module is additionally operable to monitor
Whether the electric life controller powers off, and after energization is monitored, according to the testing result preserved and in the elevator controlling
The logical combination for each detection signal that device is provided after being powered, determines whether the elevator is in oppressive state.
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| CN201510232355.8A CN104803251B (en) | 2015-05-08 | 2015-05-08 | The detection method and system of elevator malfunction |
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| CN201510232355.8A CN104803251B (en) | 2015-05-08 | 2015-05-08 | The detection method and system of elevator malfunction |
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| CN109368435A (en) * | 2018-12-21 | 2019-02-22 | 深圳技术大学（筹） | Monitoring method and device for elevator trapped fault |
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| CN113233276B (en) * | 2021-05-13 | 2022-10-25 | 上海江菱机电有限公司 | Auxiliary analysis method and system for monitoring failure of trapped image of elevator car |
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| CN104803251A (en) | 2015-07-29 |
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