CN106744114A - Elevator running environment monitoring system - Google Patents
Elevator running environment monitoring system Download PDFInfo
- Publication number
- CN106744114A CN106744114A CN201611237144.4A CN201611237144A CN106744114A CN 106744114 A CN106744114 A CN 106744114A CN 201611237144 A CN201611237144 A CN 201611237144A CN 106744114 A CN106744114 A CN 106744114A
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- Prior art keywords
- chip
- bus
- circuit
- detection circuit
- room temperature
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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
- B66B5/0006—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
Abstract
The invention discloses a kind of elevator running environment monitoring system, belong to elevator Internet of Things field.The system includes monitoring device, serial server, signal transmission bus, computer room temperature detection circuit and/or pit water detection circuit；The serial server is connected with the signal transmission bus；The monitoring device is connected with the serial server；When the system includes that the computer room temperature detects circuit, two bus signals ends of first bus chip connect the signal transmission bus respectively；When the system includes pit water detection circuit, two bus signals ends of second bus chip connect the signal transmission bus respectively；Solve and elevator running environment is not monitored in the prior art, the problem of security incident easily occur, reached the effect of security when monitor in real time elevator running environment, raising elevator are run.
Description
Technical field
The present embodiments relate to elevator Internet of Things field, more particularly to a kind of elevator running environment monitoring system.
Background technology
With expanding economy, application of the elevator in life is increasingly popularized, there is accident in order to avoid elevator, it is necessary to
Periodically elevator is checked.
In the prior art, the environment to elevator examination primarily directed to elevator interior detects, such as：Detection elevator
Switch gate signal, safety signal, the humidity and temperature of elevator interior.
When actually used, elevator running environment also influences the operation safety of elevator, such as：Elevator pit ponding and computer room
Temperature, elevator running environment is not monitored cannot carry out early warning to elevator running environment in time, cause security incident occur, influence electricity
The normal operation of ladder.
The content of the invention
In order to solve problem of the prior art, one kind is the embodiment of the invention provides in elevator running environment monitoring system.
The technical scheme is as follows：
A kind of first aspect, there is provided elevator running environment monitoring system, the system includes monitoring device, serial port service
Device, signal transmission bus, computer room temperature detection circuit and/or pit water detection circuit；
The serial server is connected with the signal transmission bus；
The monitoring device is connected with the serial server；
The computer room temperature detection circuit includes temperature sensor, the first singlechip chip and the first signaling conversion circuit；
First singlechip chip includes the first serial input terminal, the first serial output terminal and the first input I/ outputs O ends, described the
One signaling conversion circuit includes the first bus chip；The I/O ends of the temperature sensor connect first singlechip chip
The first I/O ends, first serial input terminal connects the output end of first bus chip, first Serial output
The input of end connection first bus chip；
The pit water detection circuit includes ponding sensing cable, operational amplifier, second singlechip chip and second
Signaling conversion circuit；The second singlechip chip includes the second serial input terminal, the second serial output terminal and the 2nd I/O ends,
The secondary signal change-over circuit includes the second bus chip；The two ends of the ponding sensing cable are connected to the computing
The positive terminal and negative pole end of amplifier；The output end of the operational amplifier connects the 2nd I/O of the second singlechip chip
End, second serial input terminal connects the output end of second bus chip, the second output end connection described second
The input of bus chip；
When the system includes that the computer room temperature detects circuit, two bus signals ends of first bus chip
The signal transmission bus are connected respectively；
When the system includes pit water detection circuit, two bus signals ends difference of second bus chip
Connect the signal transmission bus.
Optionally, computer room temperature detection circuit also includes the first display circuit, and first display circuit includes the
One display chip；
The input of first display chip is connected with the 3rd I/O ends of first singlechip chip.
Optionally, computer room temperature detection circuit also includes the second display circuit, and second display circuit includes the
Two display chips；
The input of second display chip is connected with the 4th I/O ends of the second singlechip chip.
Optionally, when the quantity of the monitoring device is at least two, the monitoring device passes through routing device and institute
State serial server connection.
Optionally, first singlechip chip is also associated with reset circuit and clock circuit.
Optionally, the second singlechip chip is also associated with reset circuit and clock circuit.
Optionally, the computer room temperature detection circuit also includes resistance；And/or, the pit water detection circuit is also wrapped
Include resistance and triode.
Computer room temperature is detected by computer room temperature observation circuit, and/or, the ponding of pit ponding electric circuit inspection elevator pit
Situation, and the data that will be detected are sent to monitoring device by signal transmission bus through serial server, realize transporting elevator
The monitoring of row environment, solves and elevator running environment is not monitored in the prior art, the problem of security incident easily occurs,
The effect of security when the real-time elevator running environment of monitor in real time, raising elevator are run is reached.
Brief description of the drawings
Technical scheme in order to illustrate more clearly the embodiments of the present invention, below will be to that will make needed for embodiment description
Accompanying drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for
For those of ordinary skill in the art, on the premise of not paying creative work, other can also be obtained according to these accompanying drawings
Accompanying drawing.
Fig. 1 is a kind of principle schematic of the elevator running environment monitoring system according to an exemplary embodiment；
Fig. 2 is a kind of electrical block diagram of the signaling conversion circuit according to an exemplary embodiment；
Fig. 3 is a kind of structural representation of the connection circuit of the temperature sensor according to an exemplary embodiment；
Fig. 4 is a kind of structural representation of the single chip circuit according to an exemplary embodiment；
A kind of structural representation of the connection circuit of ponding sensing cables of the Fig. 5 according to an exemplary embodiment；
Fig. 6 is a kind of schematic diagram of the display interface of the monitoring software according to an exemplary embodiment.
Specific embodiment
Here exemplary embodiment will be illustrated in detail, its example is illustrated in the accompanying drawings.Following description is related to
During accompanying drawing, unless otherwise indicated, the same numbers in different accompanying drawings represent same or analogous key element.Following exemplary embodiment
Described in implementation method do not represent and the consistent all implementation methods of the present invention.Conversely, they be only with it is such as appended
The example of the consistent apparatus and method of some aspects being described in detail in claims, of the invention.
Fig. 1 is a kind of principle schematic of the elevator running environment monitoring system according to an exemplary embodiment.Should
Elevator running environment monitoring system includes：Monitoring device 110, serial server 120, the inspection of signal transmission bus 130, computer room temperature
Slowdown monitoring circuit 140 and/or pit water detection circuit 150.
The elevator running environment monitoring system can only include computer room temperature detection circuit 140 or pit water detection circuit
150；Can also simultaneously include that computer room temperature detects circuit 140 and pit water detection circuit 150.
Computer room temperature detection circuit 140 is arranged at elevator(lift) machine room.Optionally, computer room temperature detection circuit 140 is arranged at electricity
Near switch board in terraced computer room.Computer room temperature detection circuit 140 is used to detect the temperature of elevator(lift) machine room.
Pit water detection circuit 150 is arranged in elevator pit.Pit water detection circuit 150 is used to detect elevator bottom
The pit ponding situation in hole.
When elevator running environment monitoring system includes that computer room temperature detects circuit 140, signal transmission bus 130 are used for will
The temperature signal that computer room temperature detection circuit 140 is detected is transmitted to monitoring device 110；When elevator running environment monitoring system bag
When including pit water detection circuit 150, signal transmission bus 130 are used for the ponding for detecting pit water detection circuit 150
Signal transmission is to monitoring device 110.
Monitoring device 110 is used to be detected by computer room temperature the computer room of the temperature signal monitoring elevator that circuit 140 is detected
Temperature；Monitoring device 110 is additionally operable to the pit product of the ponding signal monitoring elevator pit detected by pit ponding circuit 150
Regimen condition.The computer room temperature and/or pit ponding situation that monitoring device 110 is additionally operable to getting are shown, are stored and clear
Look at.
Optionally, when there is multiple elevator, monitoring device 110 can simultaneously monitor multiple elevator.
Optionally, the cell where monitoring device 110 is located at elevator, monitoring device 110 can be with the machine of direct access elevator
Room temperature and/or pit ponding situation.
Optionally, the cell where monitoring device 110 is not located at elevator, monitoring device 110 can be obtained by reference address
The computer room temperature and/or pit ponding situation of power taking ladder.
Monitoring device 110 is connected with serial server 120, and serial server 120 is connected with signal transmission bus 130.
Because the signal of the transmission of signal transmission bus 130 is not the signal that monitoring device 110 is capable of Direct Recognition, therefore,
Need to add serial server 120 between monitoring device 110 and signal transmission bus 130, passed signal by serial server
The signal of defeated bus 130 is converted to the signal that monitoring device 110 is capable of Direct Recognition.
Optionally, when the quantity of monitoring device 110 is at least two, the monitoring of serial server 110 and at least two sets
Standby 110 are connected by routing device.Optionally, routing device is interchanger or router.
Computer room temperature detection circuit 140 is connected with signal transmission bus 130.
Computer room temperature detection circuit 140 includes the conversion of temperature sensor 141, the first singlechip chip 142 and the first signal
Circuit 143.Temperature sensor 141 is connected with the I/O ends of the first singlechip chip 142, and the first singlechip chip 142 and first is believed
Number change-over circuit 143 is connected.
Pit water detection circuit 150 is connected with signal transmission bus 130.
Pit water detection circuit 150 includes the big device 152 of ponding sensing cable 151, computing side, second singlechip chip
153 and secondary signal change-over circuit 154.Ponding sensing cable 151 is connected with operational amplifier 152, the big device 152 in computing side and the
Two singlechip chips 153 are connected, and second singlechip chip 153 is connected with secondary signal change-over circuit 154.
The corresponding elevator running environment system of one elevator includes that at least one computer room temperature detects circuit 140 and/or extremely
A few pit water detection circuit 150.Each can need the position for monitoring temperature that one computer room is set in elevator(lift) machine room
Temperature sensing circuit, and/or, in elevator pit, each needs the position for monitoring pit ponding situation to set a pit ponding inspection
Slowdown monitoring circuit.
Each computer room temperature detection circuit 140 includes a temperature sensor, a singlechip chip and a signal
Change-over circuit.Each pit water detection circuit 150 includes ponding sensing cable, operational amplifier, a list
Piece movement piece and a signaling conversion circuit.
Optionally, the letter in the signaling conversion circuit and pit water detection circuit 150 in computer room temperature detection circuit 140
Number change-over circuit is the same.
Optionally, the monolithic in the singlechip chip and pit water detection circuit 150 in computer room temperature detection circuit 140
Movement piece is the same.
The embodiment of the present invention is with the signaling conversion circuit and pit water detection circuit in computer room temperature detection circuit 140
Signaling conversion circuit in 150 is the same, singlechip chip and pit water detection circuit in computer room temperature detection circuit 140
Illustrated as a example by singlechip chip in 150 is the same.
Fig. 2 it is exemplary show a kind of electrical block diagram of signaling conversion circuit, signaling conversion circuit includes total
Core piece.The model MAX485 of bus chip in Fig. 2.
Computer room temperature detection circuit includes temperature sensor, the first singlechip chip and the first signaling conversion circuit.
Optionally, computer room temperature detection circuit also includes resistance.Connected mode of the resistance in computer room temperature detection circuit
As shown in Fig. 2, Fig. 3 and Fig. 4.
By taking the temperature sensor of model DS18B20 as an example, by taking first singlechip chip of model STC89C52 as an example,
Temperature sensor DS18B20 is by the first singlechip chip in circuit as shown in Figure 3 and circuit as shown in Figure 4
STC89C52 is connected.By taking first bus chip of model MAX485 as an example, shown in the first singlechip chip STC89C52 and Fig. 2
Circuit in the first bus chip MAX485 connection.
First singlechip chip includes the first serial input terminal RXD, the first serial output terminal TXD and an I/O ends P17.
The I/O ends of temperature sensor connect an I/O ends P17 of the first singlechip chip.
The output end RO of the first bus chip connects the first serial input terminal RXD of the first singlechip chip, the first bus
The input DI of chip connects the first serial output terminal TXD of the first singlechip chip.
When elevator running environment monitoring system includes that computer room temperature detects circuit, two buses letter of the first bus chip
Number end A, B connect signal transmission bus 130 respectively.
The VCC ends connection power supply V of the first bus chip, the GND ends ground connection of the first bus chip；The VCC of temperature sensor
End connection power supply V, the GND ends ground connection of temperature sensor.
Optionally, ponding sensing cable is formed by 2 high density polyethylene (HDPE) wires of lightweight around the compacting of spiral axis.Should
Ponding sensor circuit has that detection sensitivity is high, reliable, the with low cost, reliability that is swift in response is high, from the quick dry and comfortable spy of water
Point.
Pit water detection circuit includes ponding sensing cable, operational amplifier, second singlechip chip and secondary signal
Change-over circuit.
Optionally, pit water detection circuit also includes resistance and triode.Resistance and triode are in pit water detection
Connected mode in circuit is as shown in Fig. 2, Fig. 4 and Fig. 5.
By taking the ponding sensing cable of model IVG-2L as an example, by taking first singlechip chip of model STC89C52 as an example,
Ponding sensing cable L is connected by circuit as shown in Figure 5 with the second singlechip chip STC89C52 in circuit as shown in Figure 4
Connect.By taking second bus chip of model MAX485 as an example, in the circuit shown in second singlechip chip STC89C52 and Fig. 2
Second bus chip MAX485 is connected.
Second singlechip chip includes the second serial input terminal RXD, the second serial output terminal TXD and the 2nd I/O ends P16.
The two ends of ponding sensing cable L are connected to the positive pole+end and negative pole-end of operational amplifier LM, ponding sensing
Cable do not have+hold and-end divide.
The output end P16 of operational amplifier LM connects the 2nd I/O ends P16 of second singlechip chip, second singlechip core
Second serial input terminal RXD of piece connects the output end RO of the second bus chip, the second Serial output of second singlechip chip
End TXD connects the input DI of the second bus chip.
When elevator running environment monitoring system includes pit water detection circuit, two buses letter of the second bus chip
Number end A, B connect signal transmission bus 130 respectively.
It should be noted that the second singlechip chip being connected with ponding sensing cable, and be connected with temperature sensor
First singlechip chip is not same singlechip chip；The second bus chip and computer room stabilization in pit water detection circuit
The first bus chip in detection circuit is not same bus chip.
The monitoring software for monitoring elevator running environment installed in monitoring device, Fig. 6 is according to an exemplary implementation
A kind of schematic diagram of the display interface of the monitoring software for exemplifying.
When button " start monitoring " 61 is clicked on, monitoring device by serial server to pit water detection circuit and/
Or computer room temperature detection circuit sends monitoring signals；Pit water detection circuit detects whether pit has product according to monitoring signals
Water, and/or, computer room temperature detects that circuit detects computer room temperature according to monitoring signals；Pit water detection circuit and/or computer room temperature
The degree detection signal that will detect of circuit is transmitted to serial server by signal transmission bus, then by serial server transmit to
Monitoring device.Monitoring cycle can be set by monitoring device.After button " starting monitoring " 61 is triggered, monitoring device is lasting
The signal that pit water detection circuit and/or computer room temperature detection circuit are uploaded is received, and will be included in monitoring after signal transacting
On the display interface of software.After button " stopping monitoring " 62 is triggered, monitoring device stops detection computer room temperature and pit product
Regimen condition.
Optionally, the monitoring software installed in monitoring device is by communication module, data acquisition and display module, alarm module
Composition.Communication module can carry out messaging parameter setting, realize being based on Ethernet, using the virtual serial communication device of ICP/IP protocol
Realize data penetration transmission.Data acquisition and display module realize resolve packet, obtain the data of needs and are displayed in display interface
On.There is red alarm signal when corresponding data is detected more than limitation in alarm module on interface, colleague drives monitoring device
Sound card send alarm.
When elevator pit has ponding, the operational amplifier output high level signal in pit water detection circuit works as electricity
When terraced pit does not have ponding, the operational amplifier output low level signal in pit water detection circuit；Connect with operational amplifier
The singlechip chip for connecing determines whether ponding according to high level signal or low level signal.
The temperature sensor of model DS18B20 has low small volume, hardware spending, strong antijamming capability, high precision
Feature.Detection range is -55 DEG C to+125 DEG C, and the preference temperature of elevator(lift) machine room is+5 DEG C to+40 DEG C, the detection of temperature sensor
Scope covers the preference temperature of elevator(lift) machine room.
In sum, elevator running environment monitoring system provided in an embodiment of the present invention, by computer room temperature observation circuit
Detection computer room temperature, and/or, the ponding situation of pit ponding electric circuit inspection elevator pit, and the data that will be detected are by letter
Number transfer bus are sent to monitoring device through serial server, realize the monitoring to elevator running environment, solve prior art
In elevator running environment is not monitored, easily there is the problem of security incident, reached monitor in real time elevator running environment,
Improve the effect of security when elevator runs.
Optionally, singlechip chip is also associated with reset circuit and clock circuit.As shown in figure 4, singlechip chip also connects
It is connected to reset circuit 41 and clock circuit 42.Reset circuit 41 is made up of button, resistor R, capacitor C；Clock circuit 42 by
Capacitor C and crystal are constituted.
First singlechip chip is connected with reset circuit and clock circuit, second singlechip chip be connected with reset circuit and
Clock circuit.
Optionally, computer room temperature detection circuit also includes the first display circuit, and the first display circuit includes the first display core
Piece.Such as：The model LCD1602 of the first display chip.
The input of the first display chip is connected with the 3rd I/O ends of the first singlechip chip.The quantity at the 3rd I/O ends with
The quantity of the input of the first display chip is identical.Such as：The quantity of the input of the first display chip is 8, the 3rd I/O ends
Quantity also be 8.
Optionally, pit water detection circuit also includes the second display circuit, and the second display circuit includes the second display core
Piece.Such as：The model LCD1602 of the second display chip.
The input of the second display chip is connected with the 4th I/O ends of second singlechip chip.The quantity at the 4th I/O ends with
The quantity of the input of the second display chip is identical.Such as：The quantity of the input of the second display chip is 8, the 4th I/O ends
Quantity also be 8.
The embodiments of the present invention are for illustration only, and the quality of embodiment is not represented.
The foregoing is only presently preferred embodiments of the present invention, be not intended to limit the invention, it is all it is of the invention spirit and
Within principle, any modification, equivalent substitution and improvements made etc. should be included within the scope of the present invention.
Claims (7)
1. a kind of elevator running environment monitoring system, it is characterised in that the system includes monitoring device, serial server, letter
Number transfer bus, computer room temperature detection circuit and/or pit water detection circuit；
The serial server is connected with the signal transmission bus；
The monitoring device is connected with the serial server；
The computer room temperature detection circuit includes temperature sensor, the first singlechip chip and the first signaling conversion circuit；It is described
First singlechip chip includes the first serial input terminal, the first serial output terminal and the first input I/ output O ends, first letter
Number change-over circuit includes the first bus chip；The I/O ends of the temperature sensor connect the described of first singlechip chip
First I/O ends, first serial input terminal connects the output end of first bus chip, and first serial output terminal connects
Connect the input of first bus chip；
The pit water detection circuit includes ponding sensing cable, operational amplifier, second singlechip chip and secondary signal
Change-over circuit；The second singlechip chip includes the second serial input terminal, the second serial output terminal and the 2nd I/O ends, described
Secondary signal change-over circuit includes the second bus chip；The two ends of the ponding sensing cable are connected to the operation amplifier
The positive terminal and negative pole end of device；The output end of the operational amplifier connects the 2nd I/O ends of the second singlechip chip, institute
The output end that the second serial input terminal connects second bus chip is stated, second output end connects second total core
The input of piece；
When the system includes that the computer room temperature detects circuit, two bus signals ends difference of first bus chip
Connect the signal transmission bus；
When the system includes pit water detection circuit, two bus signals ends of second bus chip connect respectively
The signal transmission bus.
2. system according to claim 1, it is characterised in that the computer room temperature detection circuit also includes the first display electricity
Road, first display circuit includes the first display chip；
The input of first display chip is connected with the 3rd I/O ends of first singlechip chip.
3. system according to claim 1, it is characterised in that the computer room temperature detection circuit also includes the second display electricity
Road, second display circuit includes the second display chip；
The input of second display chip is connected with the 4th I/O ends of the second singlechip chip.
4. according to any described system of claims 1 to 3, it is characterised in that when the quantity of the monitoring device is at least two
When individual, the monitoring device is connected by routing device with the serial server.
5. system according to claim 1 and 2, it is characterised in that first singlechip chip is also associated with the electricity that resets
Road and clock circuit.
6. the system according to claim 1 or 3, it is characterised in that the second singlechip chip is also associated with the electricity that resets
Road and clock circuit.
7. according to any described system of claims 1 to 3, it is characterised in that
The computer room temperature detection circuit also includes resistance；
And/or,
The pit water detection circuit also includes resistance and triode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611237144.4A CN106744114A (en) | 2016-12-28 | 2016-12-28 | Elevator running environment monitoring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611237144.4A CN106744114A (en) | 2016-12-28 | 2016-12-28 | Elevator running environment monitoring system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106744114A true CN106744114A (en) | 2017-05-31 |
Family
ID=58925287
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611237144.4A Pending CN106744114A (en) | 2016-12-28 | 2016-12-28 | Elevator running environment monitoring system |
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| Country | Link |
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| CN (1) | CN106744114A (en) |
Citations (8)
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|---|---|---|---|---|
| CN201077702Y (en) * | 2007-06-16 | 2008-06-25 | 重庆永旺科技发展有限公司 | Elvator safety operation dynamic monitoring management system terminal |
| CN201406235Y (en) * | 2009-03-27 | 2010-02-17 | 北京市朝阳区特种设备检测所 | Dynamic intelligent monitoring device for elevator |
| CN202152243U (en) * | 2011-03-28 | 2012-02-29 | 江苏通用电梯有限公司 | Wireless sensor network (WSN) sensor node device of elevator machine room |
| CN202880594U (en) * | 2012-05-29 | 2013-04-17 | 上海江燕电梯配件研究所 | Real-time monitoring device for elevators |
| JP2014504243A (en) * | 2010-12-14 | 2014-02-20 | コネ コーポレイション | Interface unit and transfer system and method |
| CN104860140A (en) * | 2015-05-29 | 2015-08-26 | 四川省特种设备检验研究院 | Waterproof elevator control system and method based on water sense sensor |
| CN205045638U (en) * | 2015-10-15 | 2016-02-24 | 北京中海物业管理有限公司 | Automatic alarm for elevator fault |
| CN206336870U (en) * | 2016-12-28 | 2017-07-18 | 江苏省特种设备安全监督检验研究院 | Elevator running environment monitoring system |
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2016
- 2016-12-28 CN CN201611237144.4A patent/CN106744114A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201077702Y (en) * | 2007-06-16 | 2008-06-25 | 重庆永旺科技发展有限公司 | Elvator safety operation dynamic monitoring management system terminal |
| CN201406235Y (en) * | 2009-03-27 | 2010-02-17 | 北京市朝阳区特种设备检测所 | Dynamic intelligent monitoring device for elevator |
| JP2014504243A (en) * | 2010-12-14 | 2014-02-20 | コネ コーポレイション | Interface unit and transfer system and method |
| CN202152243U (en) * | 2011-03-28 | 2012-02-29 | 江苏通用电梯有限公司 | Wireless sensor network (WSN) sensor node device of elevator machine room |
| CN202880594U (en) * | 2012-05-29 | 2013-04-17 | 上海江燕电梯配件研究所 | Real-time monitoring device for elevators |
| CN104860140A (en) * | 2015-05-29 | 2015-08-26 | 四川省特种设备检验研究院 | Waterproof elevator control system and method based on water sense sensor |
| CN205045638U (en) * | 2015-10-15 | 2016-02-24 | 北京中海物业管理有限公司 | Automatic alarm for elevator fault |
| CN206336870U (en) * | 2016-12-28 | 2017-07-18 | 江苏省特种设备安全监督检验研究院 | Elevator running environment monitoring system |
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Application publication date: 20170531 |