CN105836154B - A kind of air bridge elevating safety monitoring system - Google Patents
A kind of air bridge elevating safety monitoring system Download PDFInfo
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- CN105836154B CN105836154B CN201610302671.2A CN201610302671A CN105836154B CN 105836154 B CN105836154 B CN 105836154B CN 201610302671 A CN201610302671 A CN 201610302671A CN 105836154 B CN105836154 B CN 105836154B
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 39
- 230000003028 elevating effect Effects 0.000 title claims abstract description 34
- 238000006073 displacement reaction Methods 0.000 claims abstract description 61
- 238000004891 communication Methods 0.000 claims description 19
- 238000001514 detection method Methods 0.000 claims description 13
- 230000007423 decrease Effects 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 8
- 238000012360 testing method Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 4
- 230000006378 damage Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
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- 239000007787 solid Substances 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64F—GROUND OR AIRCRAFT-CARRIER-DECK INSTALLATIONS SPECIALLY ADAPTED FOR USE IN CONNECTION WITH AIRCRAFT; DESIGNING, MANUFACTURING, ASSEMBLING, CLEANING, MAINTAINING OR REPAIRING AIRCRAFT, NOT OTHERWISE PROVIDED FOR; HANDLING, TRANSPORTING, TESTING OR INSPECTING AIRCRAFT COMPONENTS, NOT OTHERWISE PROVIDED FOR
- B64F1/00—Ground or aircraft-carrier-deck installations
- B64F1/30—Ground or aircraft-carrier-deck installations for embarking or disembarking passengers
- B64F1/305—Bridges extending between terminal building and aircraft, e.g. telescopic, vertically adjustable
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Aviation & Aerospace Engineering (AREA)
- Length Measuring Devices With Unspecified Measuring Means (AREA)
- Emergency Alarm Devices (AREA)
Abstract
The present invention provides a kind of air bridge elevating safety monitoring system, comprising: displacement sensor, controller and relay；The normally-closed contact of the relay is connected in the scram button circuit of the elevating control module of the air bridge；Institute's displacement sensors are set on air bridge, and for detecting the air bridge to the height on ground, the height is sent to the controller；The controller, for the height to be compared with predetermined normal level range, when the height exceeds the predetermined normal level range, the normally-closed contact for controlling the relay is disconnected, to cut off the general supply of the air bridge.Be able to detect the use state of air bridge, when uncontrolled decline occurs or rises, can and alarm prevent.To ensure aircraft and the safety of personnel.
Description
Technical field
The present invention relates to airline security device technical field more particularly to a kind of air bridge elevating safety monitoring systems.
Background technique
Air bridge is also known as empty bridge or connecting bridge, is the facility in a kind of airport building, extends to aircraft from landing gate
Cabin door facilitates passenger to pass in and out cabin.
Before air bridge appearance, passenger must walking and ground on high asphalt road, then climb up mobile boarding
Ladder, current such boarding method still use on world majority airport, but are all usually the airparks that can only accommodate baby plane.
Under any weather condition, passenger can be allowed to disembark without exposing to the sun and rain convenient for boarding using shelter bridge.Its head end is solid
The axis being scheduled at landing gate, the body of a bridge can then move left and right, head end and tail end all liftables and flexible, therefore be applicable to each
The different aircraft of kind.There is a control room at tail end to control the movement of the body of a bridge, in addition can extend outwardly there are also a vestibule diaphragm, snugly
It is connected cabin door, thus is protected from weather influences.
Currently, once occurring in air bridge use process because of air bridge control system logic error and guarantor
Situations such as protecting accident caused by deficiency to occur, such as causing aircraft damage and injury to personnel.
Therefore, those skilled in the art need to provide a kind of air bridge elevating safety monitoring system, are able to detect boarding
The use state of shelter bridge, when uncontrolled decline occurs or rises, can and alarm prevent.
Summary of the invention
In order to solve the above technical problem existing in the prior art, the present invention provides a kind of air bridge elevating safety prison
Control system is able to detect the use state of air bridge, when uncontrolled decline occurs or rises, can and alarm system
Only.To ensure aircraft and the safety of personnel.
The embodiment of the present invention provides a kind of air bridge elevating safety monitoring system, comprising: displacement sensor, controller and
Relay；
The normally-closed contact of the relay is connected in the scram button circuit of the elevating control module of the air bridge；
Institute's displacement sensors are set on air bridge, for detecting the air bridge to the height on ground, by institute
It states height and is sent to the controller；
The controller, for the height to be compared with predetermined normal level range, when the height exceeds institute
When stating predetermined normal level range, the normally-closed contact for controlling the relay is disconnected, to cut off the general supply of the air bridge.
Preferably, the controller is programmable logic controller (PLC) PLC；
Institute's displacement sensors export the height of analog signal to the PLC；
The predetermined normal level range is obtained ahead of time in the PLC.
Preferably, the predetermined normal level range are as follows: H+h1 > h > H-h2；
Wherein, h is height of the air bridge to ground of institute's displacement sensors detection；The H is the air bridge
Altitude datum value, the h1 are default lifting height value, and the h2 is default falling head value.
Preferably, institute's displacement sensors are arranged in each air bridge.
Preferably, at least two displacement sensors are arranged in each air bridge, and each institute's displacement sensors are corresponding
The normally-closed contact of one PLC and relay；The normally-closed contact of all relays is connected on the loading arcade
In the scram button circuit of the elevating control module of bridge.
Preferably, two institute's displacement sensors are arranged in each air bridge, and each institute's displacement sensors are one corresponding
The normally-closed contact of PLC and relay；The normally-closed contact of all relays is connected on the air bridge
In the scram button circuit of elevating control module.
Preferably, further includes: host computer and sound and light alarm module；
The controller is also used to when the height is beyond the predetermined normal level range, Xiang Suoshu host computer hair
Send warning information；
The host computer notifies the operator on duty of duty room after receiving the warning information；
The controller is also used to control alarm relay when the height is beyond the predetermined normal level range
Contact closure, so that the sound and light alarm module is alarmed；The contact of the sound and light alarm module and the alarm relay
Series connection.
Preferably, further includes: change-over switch；
The height detection of air bridge is carried out when the change-over switch is closed for starting the monitoring system；The conversion is opened
For stopping the monitoring system to the height detection of air bridge when shutdown is opened.
Preferably, the height is sent to the controller by wired communication mode by institute's displacement sensors.
Preferably, the first wireless communication module is arranged in the controller, and the second wireless communication module is arranged in the host computer,
The warning information is sent to second wireless communication module, institute by first wireless communication module by the controller
It states host computer and the warning information is received by second wireless communication module.
Compared with prior art, the present invention has at least the following advantages:
Air bridge can be aligned when normal with the cabin door height of aircraft, still, when the control system of air bridge goes out
When existing problem, air bridge uncontrolled may be risen or fallen.Therefore, the present embodiment can detecte air bridge pair
The absolute altitude on ground, when be more than normal range (NR) when, cutting control air bridge power supply, make air bridge stop rise or under
Drop, to ensure aircraft and the safety of personnel.
Detailed description of the invention
In order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The some embodiments recorded in application, for those of ordinary skill in the art, without creative efforts,
It can also be obtained according to these attached drawings other attached drawings.
Fig. 1 is one schematic diagram of air bridge elevating safety monitoring system embodiment provided by the invention；
Fig. 2 is two schematic diagram of air bridge elevating safety monitoring system embodiment provided by the invention；
Fig. 3 is three schematic diagram of air bridge elevating safety monitoring system embodiment provided by the invention；
Fig. 4 is air bridge elevating safety monitoring system example IV schematic diagram provided by the invention.
Specific embodiment
In order to enable those skilled in the art to better understand the solution of the present invention, below in conjunction in the embodiment of the present invention
Attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is only this
Invention a part of the embodiment, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art exist
Every other embodiment obtained under the premise of creative work is not made, shall fall within the protection scope of the present invention.
Embodiment one:
Referring to Fig. 1, which is one schematic diagram of air bridge elevating safety monitoring system embodiment provided by the invention.
Air bridge elevating safety monitoring system provided in this embodiment, comprising: displacement sensor 101,102 and of controller
Relay 103；
The normally-closed contact of the relay 103 is connected on the scram button circuit of the elevating control module of the air bridge
In；
Institute's displacement sensors 101 are set on air bridge, for detecting the air bridge to the height on ground, are incited somebody to action
The height is sent to the controller 102；
It is understood that the detection of displacement sensor 101 is absolute altitude of the air bridge to ground, current displacement
Sensor 101 can be with the analog signal of outputting standard range, for example, the height current signal representation of output, then electric current is believed
Number range ability be 4mA-20mA；Corresponding height is 0-1460mm.
The specific category of unlimited positioning displacement sensor 101 in the present embodiment, for example, can be the displacement of magnetostriction principle
Sensor, or the displacement sensor realized using Principles of Laser, or the displacement sensor that Principles of Radar are realized.
For example, using mangneto displacement sensor when, the displacement sensor include five pins, two of them pin connection
Power supply, as output signal, that is, the height for the analog signal that will test exports two pins, another pin ground connection.
The controller 102, for the height to be compared with predetermined normal level range, when the height exceeds
When the predetermined normal level range, the normally-closed contact for controlling the relay 103 is disconnected, to cut off the total of the air bridge
The hydraulic system of power supply, air bridge stops working, and freezes uncontrolled movement.
It should be noted that the normally-closed contact that controller 102 controls relay 103 disconnects, specifically, controller 102 is defeated
On-off model out, control relay 103 coil obtain it is electric, thus make the corresponding normally-closed contact of relay 103 disconnect.
It is understood that air bridge corresponds to a height value to the height on ground when normal, for example, working as loading arcade
Height when bridge is aligned with the cabin door of aircraft is set as air bridge altitude datum value, when displacement sensor detects air bridge
Height in the altitude datum value when floating up and down in range, when being defaulted as the height of air bridge and being in safe range, but
It is, when the height of the air bridge of displacement sensor detection, which exceeds, floats up and down range, then it is assumed that the height of air bridge goes out
Existing problem.
Such as: the predetermined normal level range are as follows: H+h1 > h > H-h2；
Wherein, h is height of the air bridge to ground of institute's displacement sensors detection；The H is the air bridge
Altitude datum value, the h1 are default lifting height value, and the h2 is default falling head value.
Wherein, h1 and h2 can be equal, can also be unequal.
In the present embodiment, preferably h1 and h2 are unequal.For example, setting h1 is 10cm, setting h2 is 20cm.
I.e. when air bridge has been increased beyond 10cm than altitude datum value, judgement goes wrong.Or, working as air bridge ratio
When altitude datum value has decrease beyond 20cm, judgement goes wrong.
It is understood that it is because of when passenger's boarding or loading that the range that floats up and down why is arranged in the present embodiment
When object, air bridge can sink.Therefore, air bridge can float up and down with passenger's boarding.
It should be noted that air bridge can be aligned when normal with the cabin door height of aircraft, still, work as air bridge
Control system when something goes wrong, air bridge uncontrolled may rise or fall.Therefore, the present embodiment can be examined
Air bridge is surveyed to the absolute altitude on ground, when being more than normal range (NR), the power supply of cutting control air bridge makes air bridge
Stopping rises or falls, to ensure aircraft and the safety of personnel.
Embodiment two:
Referring to fig. 2, which is two schematic diagram of air bridge elevating safety monitoring system embodiment provided by the invention.
It should be noted that the controller in monitoring system provided by the invention can be microprocessor, such as single-chip microcontroller
Or DSP etc., or programmable logic controller (PLC) PLC.
It is introduced so that the controller is PLC as an example in the present embodiment.For example, can be using Siemens S7300 series
PLC.
It should be noted that including memory inside PLC, altitude datum value can be saved in memory, be detected every time
The height of air bridge can also save in memory.
Institute's displacement sensors 101 export the height of analog signal to the PLC102；
The predetermined normal level range is obtained ahead of time in the PLC102.
Specifically, the predetermined normal level range is obtained ahead of time in PLC102 are as follows: when the cabin door of air bridge and aircraft
When alignment, this is highly sent to PLC102, PLC102 will be received at this time by the height of the air bridge of displacement sensor detection at this time
The height arrived is as altitude datum value.
It should be noted that under normal circumstances, an air bridge can only be set since displacement sensor is not easy to damage
The detection that a displacement sensor completes height is set, height is will test and issues controller, the peace to air bridge can be completed
Full monitoring.But good displacement sensor can also break down quality with the lengthening for using the time again.
Therefore, in order to improve the reliability of the monitoring system, the present embodiment can increase displacement sensor and the number of PLC
Mesh installs one in the left and right sides of air bridge, often for example, an air bridge is correspondingly arranged two displacement sensors respectively
A displacement sensor is correspondingly arranged a PLC.
In this way, working as one of displacement sensor or PLC or transmission line when something goes wrong, the displacement of other side is passed
Sensor and PLC can be with the height of effective monitoring air bridge.
That is, at least two displacement sensors are arranged in each air bridge, each institute's displacement sensors are one corresponding
The normally-closed contact of PLC and relay；The normally-closed contact of all relays is connected on the air bridge
In the scram button circuit of elevating control module.
Specifically it may refer to Fig. 2, which carries out by taking corresponding two displacement sensors of an air bridge and two PLC as an example
It introduces.
That is, the air bridge height that the first displacement sensor 101a will test is sent to the first PLC102a, second displacement is passed
The air bridge height that sensor 101b will test is sent to the 2nd PLC102b.For example, the 2nd PLC102b failure, first
PLC102a is normal, then host computer 104 still can receive the height of air bridge, and the first PLC102a can control the second relay
The normally-closed contact of device 103a disconnects, therefore, when air bridge height when something goes wrong, still be able to realize alarm and protection.
Monitoring system provided in this embodiment improves the reliability of monitoring system, when one of them by Redundancy Design
When something goes wrong, another way still may be implemented to protect the route of monitoring height.It is of course also possible to it is more than two-way, such as one
A air bridge is correspondingly arranged three displacement sensors.Generally two displacement sensors of setting, because of displacement sensor
Reliability comparotive it is high.
Embodiment three:
Referring to Fig. 3, which is three schematic diagram of air bridge elevating safety monitoring system embodiment provided by the invention.
In addition, air bridge elevating safety monitoring system provided in this embodiment, further includes: host computer 104 and acousto-optic report
Alert module 105；
The controller 102 is also used to when the height is beyond the predetermined normal level range, Xiang Suoshu host computer
104 send warning information；
The host computer 104 notifies the operator on duty of duty room after receiving the warning information；
The controller 102 is also used to when the height is beyond the predetermined normal level range, control alarm relay
The contact closure of device makes the sound and light alarm module 105 alarm；The sound and light alarm module 105 and the alarm relay
The contact series of device.It should be noted that being the switch exported by PLC with the concatenated alarm relay of sound and light alarm module 105
Signal is measured to control.For example, PLC exports on-off model control when the height exceeds the predetermined normal level range
The coil of alarm relay processed obtains contact closure that is electric, and then making alarm relay, and sound and light alarm module 105 is alarmed.
It should be noted that the first PLC102a controls the first sound-light alarm when height exceeds predetermined normal level range
Module 105a alarms, and the 2nd PLC102b controls the second sound and light alarm module 105b and alarms.
It is understood that host computer 104 is alarmed for controlling sound and light alarm module 105, while can also notify
Failure is discharged in the reason of operator on duty of duty room, reaches fault in-situ as early as possible, finds out air bridge failure.
In addition, monitoring system provided in this embodiment, can also include: change-over switch 106；
The height detection of air bridge is carried out when the change-over switch 106 is closed for starting the monitoring system；Described turn
When changing the disconnection of switch 106, stop the monitoring system to the height detection of air bridge.
That is, when change-over switch 106 disconnects, even if the height for the air bridge that displacement sensor will test is sent to PLC,
PLC is not also compared judgement highly to this.Only when change-over switch 106 is closed, PLC is just to the height of displacement sensor transmission
Degree is compared judgement, exports the result of judgement.
It is understood that PLC exports high level when the height of air bridge exceeds predetermined normal level range, from
And it is electric to obtain the coil of corresponding relay, corresponding sound and light alarm module starts to alarm.
It should be noted that the alarm signal of sound and light alarm module can be released when change-over switch 106 disconnects.
It is understood that the warning information can be sent on described by the controller by wired communication mode
Position machine.The warning information mode can also be sent to the host computer by wireless communication by the controller；
When mode is communicated by wireless communication between the controller and host computer, the controller setting first
The second wireless communication module is arranged in wireless communication module, the host computer, and the controller passes through first radio communication mold
The warning information is sent to second wireless communication module by block, and the host computer passes through second wireless communication module
Receive the warning information.
Example IV:
Referring to fig. 4, which is air bridge elevating safety monitoring system example IV schematic diagram provided by the invention.
It is understood that the monitoring system that above embodiments provide can be applied on all air bridges on airport.
However, it is possible to share a host computer.
As shown in figure 4, the first displacement sensor 101a corresponds to an air bridge, second displacement sensor 101b corresponding one
A air bridge.N-th displacement sensor 101n corresponds to an air bridge.
The height that first displacement sensor 101a will test is sent to the first PLC102a, and the first PLC102a is tied according to judgement
Fruit controls corresponding relay (not shown).
The height that second displacement sensor 101b will test is sent to the 2nd PLC102b, and the 2nd PLC102b is tied according to judgement
Fruit controls corresponding relay (not shown).
The height that n-th displacement sensor 101n will test is sent to the n-th PLC102n, and the n-th PLC102n is according to judging result
Control corresponding relay (not shown).
But all PLC share a host computer 104.
Host computer 104 is managed collectively the safety of all air bridges, when the air bridge having when something goes wrong, Ke Yixian
Show the information such as the number of corresponding air bridge, while notifying the operator on duty of duty room.
The above described is only a preferred embodiment of the present invention, being not intended to limit the present invention in any form.Though
So the present invention has been disclosed as a preferred embodiment, and however, it is not intended to limit the invention.It is any to be familiar with those skilled in the art
Member, without departing from the scope of the technical proposal of the invention, all using the methods and technical content of the disclosure above to the present invention
Technical solution makes many possible changes and modifications or equivalent example modified to equivalent change.Therefore, it is all without departing from
The content of technical solution of the present invention, according to the technical essence of the invention any simple modification made to the above embodiment, equivalent
Variation and modification, all of which are still within the scope of protection of the technical scheme of the invention.
Claims (8)
1. a kind of air bridge elevating safety monitoring system characterized by comprising displacement sensor, controller and relay；
The normally-closed contact of the relay is connected in the scram button circuit of the elevating control module of the air bridge；
Institute's displacement sensors are set on air bridge, for detecting the air bridge to the height on ground, by the height
Degree is sent to the controller；
The controller, for the height to be compared with predetermined normal level range, when the height is beyond described pre-
When determining normal level range, the normally-closed contact for controlling the relay is disconnected, to cut off the general supply of the air bridge；
Wherein, the controller is programmable logic controller (PLC) PLC；
Institute's displacement sensors export the height of analog signal to the PLC；
The predetermined normal level range is obtained ahead of time in the PLC；
The predetermined normal level range are as follows: H+h1 > h > H-h2；
Wherein, h is height of the air bridge to ground of institute's displacement sensors detection；The H is the air bridge height
A reference value, the h1 are default lifting height value, and the h2 is default falling head value；The air bridge altitude datum value is
The height when air bridge is aligned with the cabin door of aircraft.
2. air bridge elevating safety monitoring system according to claim 1, which is characterized in that each air bridge setting
One institute's displacement sensors.
3. air bridge elevating safety monitoring system according to claim 1, which is characterized in that each air bridge setting
At least two displacement sensors, each institute's displacement sensors correspond to the normal of PLC and relay
Closed contact；The normally-closed contact of all relays is connected on the scram button circuit of the elevating control module of the air bridge
In.
4. air bridge elevating safety monitoring system according to claim 3, which is characterized in that each air bridge setting
Two institute's displacement sensors, the normally closed touching of the corresponding PLC and relay of each institute's displacement sensors
Point；The normally-closed contact of all relays is connected in the scram button circuit of the elevating control module of the air bridge.
5. air bridge elevating safety monitoring system according to claim 1, which is characterized in that further include: host computer and
Sound and light alarm module；
The controller is also used to when the height is beyond the predetermined normal level range, and Xiang Suoshu host computer sends police
It notifies breath；
The host computer notifies the operator on duty of duty room after receiving the warning information；
The controller is also used to control the touching of alarm relay when the height is beyond the predetermined normal level range
Point closure, makes the sound and light alarm module alarm；The contact series of the sound and light alarm module and the alarm relay.
6. air bridge elevating safety monitoring system according to claim 1-5, which is characterized in that further include:
Change-over switch；
The height detection of air bridge is carried out when the change-over switch is closed for starting the monitoring system；The change-over switch is disconnected
For stopping the monitoring system to the height detection of air bridge when opening.
7. air bridge elevating safety monitoring system according to claim 1, which is characterized in that institute's displacement sensors are logical
It crosses wired communication mode and the height is sent to the controller.
8. air bridge elevating safety monitoring system according to claim 5, which is characterized in that controller setting the
The second wireless communication module is arranged in one wireless communication module, the host computer, and the controller is wirelessly communicated by described first
The warning information is sent to second wireless communication module by module, and the host computer passes through second radio communication mold
Block receives the warning information.
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| CN201610302671.2A CN105836154B (en) | 2016-05-09 | 2016-05-09 | A kind of air bridge elevating safety monitoring system |
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| CN201610302671.2A CN105836154B (en) | 2016-05-09 | 2016-05-09 | A kind of air bridge elevating safety monitoring system |
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| CN110134058B (en) * | 2019-05-16 | 2021-02-02 | 深圳市捷赛机电有限公司 | Boarding bridge test operation detection system and method |
| CN114913677A (en) * | 2022-06-08 | 2022-08-16 | 北京千尧新能源科技开发有限公司 | Control method of marine telescopic corridor bridge and related equipment |
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| CN2292072Y (en) * | 1996-12-16 | 1998-09-23 | 深圳天达空港设备有限公司 | Electromechanicl type lifting/lowering synchronous automatic corrector for passenger loading bridge |
| JP4106155B2 (en) * | 1999-06-11 | 2008-06-25 | 新明和工業株式会社 | Anti-collision device for boarding bridge |
| CN202935588U (en) * | 2012-10-15 | 2013-05-15 | 蒂森克虏伯机场系统(中山)有限公司 | Synchronous aerobridge lifting detection system |
| CN203172891U (en) * | 2013-01-14 | 2013-09-04 | 蒂森克虏伯机场系统(中山)有限公司 | Plane door protection control device based on SIL 2 security level |
| CN205574300U (en) * | 2016-05-09 | 2016-09-14 | 北京永华控制技术有限公司 | Shelter bridge lift safety monitoring system boards |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101549759B (en) * | 2008-04-01 | 2012-02-01 | 中国国际海运集装箱(集团)股份有限公司 | Aerobridge control system |
-
2016
- 2016-05-09 CN CN201610302671.2A patent/CN105836154B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2292072Y (en) * | 1996-12-16 | 1998-09-23 | 深圳天达空港设备有限公司 | Electromechanicl type lifting/lowering synchronous automatic corrector for passenger loading bridge |
| JP4106155B2 (en) * | 1999-06-11 | 2008-06-25 | 新明和工業株式会社 | Anti-collision device for boarding bridge |
| CN202935588U (en) * | 2012-10-15 | 2013-05-15 | 蒂森克虏伯机场系统(中山)有限公司 | Synchronous aerobridge lifting detection system |
| CN203172891U (en) * | 2013-01-14 | 2013-09-04 | 蒂森克虏伯机场系统(中山)有限公司 | Plane door protection control device based on SIL 2 security level |
| CN205574300U (en) * | 2016-05-09 | 2016-09-14 | 北京永华控制技术有限公司 | Shelter bridge lift safety monitoring system boards |
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| CN105836154A (en) | 2016-08-10 |
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Denomination of invention: A boarding bridge lifting safety monitoring system Effective date of registration: 20231121 Granted publication date: 20190315 Pledgee: Zhongguancun Branch of Bank of Beijing Co.,Ltd. Pledgor: BEIJING YONGHUA CONTROL TECHNIQUE Co.,Ltd. Registration number: Y2023110000486 |
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