CN107857180A - A kind of detecting system and method for accidental movement of elevator cage defencive function - Google Patents
A kind of detecting system and method for accidental movement of elevator cage defencive function Download PDFInfo
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- CN107857180A CN107857180A CN201711215184.3A CN201711215184A CN107857180A CN 107857180 A CN107857180 A CN 107857180A CN 201711215184 A CN201711215184 A CN 201711215184A CN 107857180 A CN107857180 A CN 107857180A
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- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000006073 displacement reaction Methods 0.000 claims abstract description 42
- 238000012360 testing method Methods 0.000 claims abstract description 22
- 238000001514 detection method Methods 0.000 claims abstract description 14
- 238000005259 measurement Methods 0.000 claims abstract description 14
- 230000009471 action Effects 0.000 claims abstract description 12
- 238000012544 monitoring process Methods 0.000 claims abstract description 7
- 238000006243 chemical reaction Methods 0.000 claims description 16
- 238000012545 processing Methods 0.000 claims description 10
- 230000001105 regulatory effect Effects 0.000 claims description 10
- 238000004891 communication Methods 0.000 claims description 8
- 230000005611 electricity Effects 0.000 claims description 4
- 230000001960 triggered effect Effects 0.000 claims description 3
- 230000001276 controlling effect Effects 0.000 claims description 2
- 238000013519 translation Methods 0.000 claims description 2
- 238000007689 inspection Methods 0.000 abstract description 15
- 230000000737 periodic effect Effects 0.000 abstract description 6
- 238000012423 maintenance Methods 0.000 abstract description 4
- 230000008569 process Effects 0.000 abstract description 3
- 238000011161 development Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 230000009466 transformation Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
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
- B66B5/0006—Monitoring devices or performance analysers
- B66B5/0018—Devices monitoring the operating condition of the elevator system
- B66B5/0031—Devices monitoring the operating condition of the elevator system for safety reasons
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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
- B66B5/04—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions for detecting excessive speed
- B66B5/06—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions for detecting excessive speed electrical
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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
- B66B5/16—Braking or catch devices operating between cars, cages, or skips and fixed guide elements or surfaces in hoistway or well
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Maintenance And Inspection Apparatuses For Elevators (AREA)
Abstract
The present invention proposes a kind of detecting system and method for accidental movement of elevator cage defencive function, and detecting system includes：Control system, speed displacement measurement subsystem, safety return circuit Monitor And Control Subsystem, brake control subsystem and handheld terminal, wherein, speed displacement measurement subsystem is connected with the control system；Protection device of the safety return circuit Monitor And Control Subsystem respectively with the control system and accidental movement of elevator cage is connected, for monitoring the action of the safety return circuit in the protection device；Brake circuit of the brake control subsystem respectively with the control system and elevator is connected, for controlling unlatching and the closure of elevator brake.The present invention controls above-mentioned multiple subsystems respectively by the control system; carry out the detection protection of accidental movement of elevator cage; with general, reasonable and security; the processes such as self-test, supervision and inspection, periodic inspection, maintenance, random checking are installed in elevator to can be used, there is larger practical value.
Description
Technical field
The invention belongs to special equipment to examine detection field, and in particular to a kind of accidental movement of elevator cage defencive function
Detecting system and method.
Background technology
As economy rapid development, city make rapid progress, miscellaneous skyscraper increasingly increases.Built installed in high level
Effect of the elevator played in people's life in building is also increasing, becomes the important vehicles of people's go off daily.
Meanwhile elevator is as a kind of mechanic-electrical special equipment, its is safe to use also increasingly to be paid attention to by people, wherein, lift car
Accidental movement be breakneck for passenger, once the consequence caused by occurring is also abnormal heavy.
The accidental movement of lift car is a kind of state of extreme danger, is the main inducing of the accidents such as shearing, extruding, directly
Connect the life security for having influence on passenger.Therefore, using the device monitoring car on elevator operation conditions and whether detect it
Generation accidental movement, it is an important safeguard measure above elevator in time by associated components come stop car.GB7588-
2003《Elevator manufactures and installation safety standard》In No. 1 amendment, the bar that accidental movement of elevator cage protection requires is added
Money, detection industry is examined to propose new requirement in elevator.TSG T7001-2009《Elevator surveillance is examined and periodic inspection rule
Then-traction and forcibly driving elevator》In No. 2 amendment, inspection content and the requirement of correlation are also given：" 1. car is in well
Road top is unloaded, up and trigger stop part with the test speed given by type approval test certificate, using only stop part energy
Stop elevator, the displacement of car is in the range of type approval test certificate provides；2. if elevator is internal superfluous using existing
Remaining brake then when brake lifts either release failure or brake force deficiency, should close sedan-chair as stop part
Door and layer door and prevent the normal startup of elevator.”
At present in elevator industry, the detection method of car accidental movement defencive function is still determined by each manufacturer, deposited
It is not unified enough in method, it is impossible to the shortcomings that conveniently being detected.For example, a kind of common detection method is confirmed at lift car
In unloaded unmanned state, elevator is reached into a certain stop and flat bed stops, now car door usually would turn off, can be according to elevator
Manufactory's presentation mode, elevator door lock loop is set to be in Disconnected mode, loop of the door lock situation during simulating car accidental movement,
Then by inspection operation or other modes, elevator is made slowly to run up or down.When car leaves original stop position
When putting, prevent the detection means in car accidental movement safeguard measure from should respond in good time, and trigger brake action, stop car
Only.There is larger difference in the Test condition of this method and the real hazard situation of accidental movement of elevator cage, and car is moved
Dynamic distance also lacks effective measurement.In summary, a kind of general, reasonable, safe lift car there is no surprisingly to move at present
The detection method of dynamic defencive function, to facilitate in elevator installs the inspection such as self-test, supervision and inspection, periodic inspection, random checking
Use.
The content of the invention
The present invention is in view of the shortcomings of the prior art, it is proposed that a kind of detecting system of accidental movement of elevator cage defencive function
And method, there is general, reasonable and security, taken out in elevator installation self-test, supervision and inspection, periodic inspection, maintenance, supervision
The process such as look into can be used, there is larger practical value, the transformation of scientific and technical result of special equipment inspection detection industry can be promoted,
Industrial competition is improved, promotes quality supervision career development, to ensureing public safety, protecting the life of the people and property to have great meaning
Justice.
In order to solve the above technical problems, the technical scheme that the present invention takes is：
The present invention proposes a kind of detecting system of accidental movement of elevator cage defencive function, including：
Control system；
Speed displacement measures subsystem, and it is connected with the control system, for measuring the speed and distance of lift car movement；
Safety return circuit Monitor And Control Subsystem, its protection device respectively with the control system and accidental movement of elevator cage are connected,
For monitoring the action of the safety return circuit in the protection device；
Brake control subsystem, its brake circuit respectively with the control system and elevator is connected, for controlling elevator
The unlatching of brake and closure.
Further, the control system includes：Controller, radio communication circuit, charging and power supply circuit, A/D conversions
Device and signal conversion circuit, wherein, the radio communication circuit is connected with the controller, and the charging and power supply circuit are with filling
Battery connects, and the input of the controller is connected with the charging and power supply circuit and A/D converter respectively, the signal
Translation circuit is connected with the input of the A/D converter.
Further, the speed displacement measurement subsystem includes：Speed displacement processing module, test the speed rubber tire and rotation volume
Code device, wherein, the speed displacement processing module is connected with the signal conversion circuit, the speed limit of test the speed rubber tire and the elevator
Wheel is connected, and main shaft of the rotary encoder respectively with the speed displacement processing module and the rubber tire that tests the speed is connected, by electricity
The displacement signal and rate signal of ladder are sent to the control system.
Further, the safety return circuit Monitor And Control Subsystem includes：Monitor elevator safety loop on-off system, respectively with institute
State safety return circuit with signal conversion circuit to be connected, the make-and-break signal of the safety return circuit is sent to the control system.
Further, the brake control subsystem includes：Power supply, voltage regulating module and switch controller, wherein, it is described
Voltage regulating module is connected with the power supply, the switch controller respectively with the signal conversion circuit, voltage regulating module and elevator
Brake circuit is connected.
Further, in addition to：Handheld terminal, it is connected by the radio communication circuit with the control system, is led to
The man-machine interface for crossing the handheld terminal is controlled, and realizes information exchange.
Further, the power supply is 220V.
In another aspect of this invention, it is proposed that one kind is using foregoing detecting system to accidental movement of elevator cage
The method that defencive function is detected, comprises the following steps：
（1）Elevator brake is controlled to open by handheld terminal, car slipping occurs in elevator；
（2）When car slipping speed reaches the action threshold value of the protection device of accidental movement of elevator cage, the protection device is triggered
Action, the safety return circuit in the protection device is disconnected, the signal of disconnection is monitored by safety return circuit Monitor And Control Subsystem, described
Safety return circuit Monitor And Control Subsystem sends the signal of the disconnection to the control system；
（3）The control system controls the brake control subsystem to stop the voltage that output supports elevator brake to open,
The elevator brake is acted and closed, stop elevator；
（4）During elevator stopping, displacement signal and rate signal are sent at the control system by speed displacement measurement subsystem
After reason, lift car displacement is shown by handheld terminal, when lift car displacement is when in the range of examination criteria displacement,
The defencive function of elevator meets standard requirement.
Further, in addition to：When the protection device fails, speed displacement measures subsystem and is by lift car
Shi Sudu is sent to the control system, is matched with default rated speed of lift in the control system, is when described
When Shi Sudu reaches the 150% of the rated speed of lift, the control system control elevator brake release, stop elevator, enter
Row protection.
Beneficial effects of the present invention include：The detecting system of accidental movement of elevator cage defencive function of the present invention and
Method, has general, reasonable and security, and self-test, supervision and inspection, periodic inspection, maintenance, random checking are installed in elevator
It can be used etc. process, there is larger practical value, special equipment can be promoted to examine the transformation of scientific and technical result of detection industry, carried
High industrial competition, quality supervision career development is promoted, to ensureing public safety, protecting the life of the people and property to be of great importance.
Brief description of the drawings
Fig. 1 is the structured flowchart of detecting system of the present invention.
Fig. 2 is the theory diagram of detecting system of the present invention.
Fig. 3 is the flow chart of detection method.
Fig. 4 is the measurement display interface schematic diagram of the present invention.
Embodiment
In order that those skilled in the art more fully understand technical scheme, with reference to specific embodiment to this
Invention is described in further detail.The embodiments described below is exemplary, is only used for explaining the present invention, without being understood that
For limitation of the present invention.Unreceipted particular technique or condition in embodiment, according to the skill described by document in the art
Art or condition are carried out according to product description.
According to an embodiment of the invention, Fig. 1 is the structured flowchart of detecting system of the present invention, and Fig. 2 is detecting system of the present invention
Theory diagram, with reference to shown in Fig. 1 and 2, detecting system of the present invention includes：Control system, speed displacement measurement subsystem,
Safety return circuit Monitor And Control Subsystem, brake control subsystem and handheld terminal, wherein, according to some embodiments of the present invention, sheet
It is common control system to invent the control system, can be included：Microprocessor system or PLC control system, the present invention is preferably
For microprocessor system.
According to some embodiments of the present invention, microprocessor system of the present invention is the core of whole detecting system
Point, for the control of whole detecting system, more specifically：Information exchange is realized with the handheld terminal；To the speed displacement
The data-signal that sends over of measurement subsystem is handled, wherein, data-signal of the present invention be preferably rate signal and
Displacement signal；The make-and-break signal sended over to the safety return circuit Monitor And Control Subsystem is handled；The brake is controlled
Subsystem carries out the operation of switch controller, the break-make in control elevator brake loop, completes the unlatching of elevator brake and closes
The action of conjunction.
According to some embodiments of the present invention, microprocessor system of the present invention includes：Microprocessor, radio communication electricity
Road, charging and power supply circuit, A/D converter and signal conversion circuit, wherein, the radio communication circuit and the microprocessor
Be connected, the charging and power supply circuit are connected with rechargeable battery, the input of the microprocessor respectively with the charging and confession
Circuit is connected with A/D converter, and the signal conversion circuit is connected with the input of the A/D converter.
Shown referring to Figures 1 and 2 according to some embodiments of the present invention, speed displacement of the present invention measures subsystem
Including：Speed displacement processing module and speed measuring device, wherein, the speed displacement processing module and the microprocessor system
The signal conversion circuit is connected, and the speed measuring device includes：Test the speed rubber tire and rotary encoder, wherein, the rubber tire that tests the speed
Be connected with the speed limited wheel of elevator, the rotary encoder respectively with the speed displacement processing module and the master of the rubber tire that tests the speed
Axle is connected, and for measuring the speed and distance of lift car movement, and the displacement signal of elevator and rate signal is sent into institute
Microprocessor system is stated, more specifically, the edge of the rubber tire that tests the speed and the speed limited wheel EDGE CONTACT of the elevator, by described
The rubber tire that tested the speed described in the speed limited wheel drive of elevator rotates, and measures.
It is shown referring to Figures 1 and 2 according to some embodiments of the present invention, safety return circuit Monitor And Control Subsystem of the present invention
Including：Elevator safety loop on-off system and signal conversion circuit are monitored, wherein, the monitoring elevator safety loop on-off system
One end be connected with the safety return circuit of the protection device of the accidental movement of elevator cage, the other end passes through its signal conversion circuit
It is connected with the signal conversion circuit of the microprocessor system, for monitoring the action of the safety return circuit, and by the peace of elevator
The make-and-break signal of full loop is sent to the microprocessor system.
It is shown referring to Figures 1 and 2 according to some embodiments of the present invention, brake control subsystem bag of the present invention
Include：220V power supplys, voltage regulating module and switch controller, wherein, the voltage regulating module is connected with the 220V power supplys, the switch
The brake circuit of the controller signal conversion circuit with the microprocessor system, voltage regulating module and elevator respectively is connected, and uses
Unlatching and closure in control elevator brake.
According to some embodiments of the present invention, voltage regulating module of the present invention is AC/DC voltage regulating modules.
It is understood that shown in reference picture 2, the protection device of elevator of the present invention and the brake circuit of elevator are set
Put in the elevator control cabinet.
According to some embodiments of the present invention, handheld terminal of the present invention passes through the radio communication circuit and the microprocessor
Device system is connected, and is controlled by the man-machine interface of the handheld terminal, realizes information exchange.
In another aspect of this invention, it is proposed that a kind of method detected using foregoing detecting system, Fig. 3
For the flow chart of detection method, Fig. 4 is the measurement display interface schematic diagram of the present invention, shown in reference picture 3 and Fig. 4, tool
Body comprises the following steps.
（1）Testing staff wirelessly sends a command to the microprocessor system, micro- place by handheld terminal
The switch controller that device system controls the brake control subsystem is managed, connects the brake circuit of elevator, system is supported in output
The voltage of dynamic device switch, and open it, there is car slipping phenomenon because both sides weight is uneven in unloaded elevator.
（2）When car slipping speed reaches the action threshold value of the protection device of accidental movement of elevator cage, the protection is triggered
Device action, the safety return circuit in the protection device being disconnected, the signal of disconnection is monitored by safety return circuit Monitor And Control Subsystem,
The safety return circuit Monitor And Control Subsystem sends the signal of the disconnection to the microprocessor system.
（3）The microprocessor system controls the switch controller of the brake control subsystem, cuts off the system of elevator
Dynamic device loop, stop the voltage that output supports elevator brake to open, the elevator brake is acted and closed, stop elevator.
（4）During elevator stopping, displacement signal and rate signal are sent to the microprocessor by speed displacement measurement subsystem
After the processing of device system, lift car displacement is shown by handheld terminal, when lift car displacement is in examination criteria displacement（In advance
If safety standard displacement）In the range of when, that is, meet industry examination criteria requirement, the defencive function of elevator meets standard requirement.
According to some embodiments of the present invention, when the protection device does not have normal work, car accidental movement protection work(
When can fail, speed displacement measurement subsystem sends the instantaneous velocity of lift car to the microprocessor system, and described
Default rated speed of lift is matched in microprocessor system, when the instantaneous velocity reaches the rated speed of lift
When 150%, the microprocessor system sends a signal to the switch controller of brake control subsystem, cuts off the braking of elevator
Device loop, discharges elevator brake, stop elevator, is protected.When the protection device of accidental movement of elevator cage is without just
Often work, causing the present invention, testing result is unqualified in detection, now, lift car may proceed to it is up, so as to cause pair
Lift facility produces damage danger in itself, in order to be protected in itself to lift facility, by the detecting system of the present invention, to this
Preventative measure is made.
According to some embodiments of the present invention, rated speed of lift of the present invention inputs the hand when starting test
Hold terminal.
Inventor has found, according to the detecting system and method for accidental movement of elevator cage defencive function of the present invention,
With general, reasonable and security, waited in elevator installation self-test, supervision and inspection, periodic inspection, maintenance, random checking
Cheng Jun can be used, and have larger practical value, and special equipment can be promoted to examine the transformation of scientific and technical result of detection industry, improve row
Industry competitiveness, quality supervision career development is promoted, to ensureing public safety, protecting the life of the people and property to be of great importance.
In the present invention, unless otherwise clearly defined and limited, the term such as term " connected ", " connection " should do broad sense reason
Solution, for example, it may be fixedly connected or be detachably connected, or integrally；Can be mechanical connection or electricity
Connection；Can be joined directly together, can also be indirectly connected by intermediary, can be two element internals connection or two
The interaction relationship of element.For the ordinary skill in the art, above-mentioned term can be understood as the case may be
Concrete meaning in the present invention.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or the spy for combining the embodiment or example description
Point is contained at least one embodiment or example of the present invention.In this manual, to the schematic representation of above-mentioned term not
Identical embodiment or example must be directed to.Moreover, specific features, structure, material or the feature of description can be any
Combined in an appropriate manner in individual or multiple embodiments or example.In addition, in the case of not conflicting, the technology of this area
Different embodiments or example and the feature of different embodiments or example described in this specification can be combined by personnel
And combination.
Although embodiments of the invention have been shown and described above, it is to be understood that above-described embodiment is example
Property, it is impossible to limitation of the present invention is interpreted as, one of ordinary skill in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, changed, replacing and modification, meanwhile, for those of ordinary skill in the art, the think of according to the application
Think, in specific embodiments and applications there will be changes.
Claims (9)
- A kind of 1. detecting system of accidental movement of elevator cage defencive function, it is characterised in that including：Control system；Speed displacement measures subsystem, and it is connected with the control system, for measuring the speed and distance of lift car movement；Safety return circuit Monitor And Control Subsystem, its protection device respectively with the control system and accidental movement of elevator cage are connected, For monitoring the action of the safety return circuit in the protection device；Brake control subsystem, its brake circuit respectively with the control system and elevator is connected, for controlling elevator The unlatching of brake and closure.
- 2. detecting system according to claim 1, it is characterised in that the control system includes：Controller, radio communication Circuit, charging and power supply circuit, A/D converter and signal conversion circuit, wherein, the radio communication circuit and the controller Be connected, the charging and power supply circuit are connected with rechargeable battery, the input of the controller respectively with the charging and power supply Circuit is connected with A/D converter, and the signal conversion circuit is connected with the input of the A/D converter.
- 3. detecting system according to claim 2, it is characterised in that the speed displacement measurement subsystem includes：Speed Displacement processing module, test the speed rubber tire and rotary encoder, wherein, the speed displacement processing module and the signal conversion circuit Be connected, the rubber tire that tests the speed is connected with the speed limited wheel of elevator, the rotary encoder respectively with the speed displacement processing module It is connected with the main shaft of the rubber tire that tests the speed, the displacement signal of elevator and rate signal is sent to the control system.
- 4. detecting system according to claim 2, it is characterised in that the safety return circuit Monitor And Control Subsystem includes：Monitoring Elevator safety loop on-off system, it is connected respectively with the safety return circuit and signal conversion circuit, by the logical of the safety return circuit Break signal is sent to the control system.
- 5. detecting system according to claim 2, it is characterised in that the brake control subsystem includes：Power supply, tune Die block and switch controller, wherein, the voltage regulating module is connected with the power supply, the switch controller respectively with the letter Number translation circuit, voltage regulating module are connected with the brake circuit of elevator.
- 6. detecting system according to claim 2, it is characterised in that also include：Handheld terminal, it passes through the channel radio Letter circuit is connected with the control system, is controlled by the man-machine interface of the handheld terminal, realizes information exchange.
- 7. detecting system according to claim 5, it is characterised in that the power supply is 220V.
- 8. a kind of detecting system using any one of claim 1-7 is carried out to accidental movement of elevator cage defencive function The method of detection, it is characterised in that comprise the following steps：（1）Elevator brake is controlled to open by handheld terminal, car slipping occurs in elevator；（2）When car slipping speed reaches the action threshold value of the protection device of accidental movement of elevator cage, the protection device is triggered Action, the safety return circuit in the protection device is disconnected, the signal of disconnection is monitored by safety return circuit Monitor And Control Subsystem, described Safety return circuit Monitor And Control Subsystem sends the signal of the disconnection to the control system；（3）The control system controls the brake control subsystem to stop the voltage that output supports elevator brake to open, The elevator brake is acted and closed, stop elevator；（4）During elevator stopping, displacement signal and rate signal are sent at the control system by speed displacement measurement subsystem After reason, lift car displacement is shown by handheld terminal, when lift car displacement is when in the range of examination criteria displacement, The defencive function of elevator meets standard requirement.
- 9. according to the method for claim 8, it is characterised in that also include：When the protection device fails, speed displacement Measurement subsystem sends the instantaneous velocity of lift car to the control system, with default elevator volume in the control system Constant speed degree is matched, when the instantaneous velocity reaches the 150% of the rated speed of lift, the control system control electricity Terraced brake release, stop elevator, is protected.
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| CN201711215184.3A CN107857180A (en) | 2017-11-28 | 2017-11-28 | A kind of detecting system and method for accidental movement of elevator cage defencive function |
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| CN201711215184.3A CN107857180A (en) | 2017-11-28 | 2017-11-28 | A kind of detecting system and method for accidental movement of elevator cage defencive function |
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| CN201711215184.3A Pending CN107857180A (en) | 2017-11-28 | 2017-11-28 | A kind of detecting system and method for accidental movement of elevator cage defencive function |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109534120A (en) * | 2018-12-12 | 2019-03-29 | 广东省特种设备检测研究院（广东省特种设备事故调查中心） | A kind of accidental movement of elevator cage protective device apparatus safe property checking device and detection method |
| CN110002312A (en) * | 2019-04-30 | 2019-07-12 | 广东省特种设备检测研究院珠海检测院 | One kind is based on pressure sensing anti-shearing elevator cage door system and shearing prevention method |
| CN111532917A (en) * | 2020-03-30 | 2020-08-14 | 广东省特种设备检测研究院中山检测院 | Detection method, tester and detection system for elevator car accidental movement protection device |
| CN111874771A (en) * | 2020-08-11 | 2020-11-03 | 广东省特种设备检测研究院 | Elevator car accidental movement protection device testing system and method |
| CN111908283A (en) * | 2020-08-11 | 2020-11-10 | 广东省特种设备检测研究院 | Response time detection device and method for elevator car accidental movement protection device |
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