CN106081768B - Light curtain fault detection method and system - Google Patents
Light curtain fault detection method and system Download PDFInfo
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- CN106081768B CN106081768B CN201610648885.5A CN201610648885A CN106081768B CN 106081768 B CN106081768 B CN 106081768B CN 201610648885 A CN201610648885 A CN 201610648885A CN 106081768 B CN106081768 B CN 106081768B
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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
- B66B13/00—Doors, gates, or other apparatus controlling access to, or exit from, cages or lift well landings
- B66B13/24—Safety devices in passenger lifts, not otherwise provided for, for preventing trapping of passengers
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- Maintenance And Inspection Apparatuses For Elevators (AREA)
Abstract
The invention discloses a kind of light curtain fault detection method and system, the method includes：After elevator, which reaches current purpose floor, to open the door, if detecting, the light curtain of the elevator has obstacle to block and do not resetted in preset reset time, detects whether the elevator occurs to force to close the door；If occurring to force to close the door, the perseveration time that the light curtain corresponds to the current purpose floor is obtained, the perseveration time is to detect that the light curtain has obstacle to block the elevator and occurs to force the time at closing time；Fault detect is carried out to the light curtain according to the perseveration time.The present invention can active detecting go out light curtain exception, so that maintenance staff have found to handle in time, improve the reliability of elevator device.
Description
Technical field
The present invention relates to elevator safety detection technique fields, more particularly to a kind of light curtain fault detection method and system.
Background technology
Elevator light curtain is a kind of light formula safety protector of elevator door, is suitable for elevator, Cargo Lift, protects the peace of passenger
Entirely.By infrared transmitter and receiver, the power pack mounted on car top and Special flexible cable mounted on elevator cage door both sides
Four most of compositions.There is infrared transmitting tube in transmitter, under the control of MCU, transmit-receive tube is opened according to this, from top to bottom
Continuous scanning gate region forms an intensive infrared ray and protects light curtain.When any of which Ray Of Light is blocked, control
System exports enabling signal immediately, and gate, that is, phase down simultaneously inverts unlatching, until obstacle leaves elevator door after warning region
Can normal switching-off can avoid the generation of elevator clamping accident in this way to reach safeguard protection purpose.But light curtain is as light
Electrical integrated product, because being influenced by environmental factor and own characteristic influences, failure rate is relatively high.
In the prior art after light curtain failure occurs in elevator, just has technical staff and carry out in-situ processing.Namely until
After the above problem occurs in elevator, light curtain failure could be passive by feedback processing, promptness, reliability Shortcomings.
Invention content
Based on the above situation, the present invention proposes a kind of light curtain fault detection method and system, can active detecting go out respectively
Light curtain under kind state is abnormal, so that maintenance staff have found and handle in time, improves the reliability of elevator device.
To achieve the goals above, the embodiment of technical solution of the present invention is：
A kind of light curtain fault detection method, includes the following steps：
After elevator, which reaches current purpose floor, to open the door, if detecting, the light curtain of the elevator has obstacle to block and pre-
If resetting time does not reset, then detect whether the elevator occurs to force to close the door；
If occurring to force to close the door, the perseveration time that the light curtain corresponds to the current purpose floor is obtained, it is described
The perseveration time is to detect that the light curtain has obstacle to block the elevator and occurs to force the time at closing time；
Fault detect is carried out to the light curtain according to the perseveration time.
A kind of light curtain fault detection method, includes the following steps：
After elevator, which reaches current purpose floor, to open the door, if detecting, the light curtain of the elevator has obstacle to block and pre-
If resetting time does not reset, then detect whether the elevator occurs to force to close the door；
If occurring to force to close the door, the perseveration time that the light curtain corresponds to the current purpose floor is obtained, according to
The perseveration time carries out faults itself detection to the light curtain, and the perseveration time is to detect that the light curtain has
Obstacle blocks the elevator and occurs to force the time at closing time；
Detect whether the light curtain has obstacle to block in objective time interval, the objective time interval is that elevator arrival is worked as
The period that preceding purpose floor is closed the door to the elevator when starting operation after opening the door；
If no obstacle blocks, obtains the elevator and remember in the first load-carrying data of the current purpose floor and in advance
Record the elevator a upper purpose floor the second load-carrying data, in conjunction with the first load-carrying data and the second load-carrying number
Light curtain signal wire burn out detection is carried out according to the light curtain.
A kind of light curtain fault detection system, including：
Light curtain occlusion detection module, for after elevator reaches current purpose floor and opens the door, detecting the light curtain of the elevator
Whether there is obstacle to block；
Light curtain reset detection module, for when detecting that the light curtain has obstacle to block, detecting the light curtain pre-
If whether resetting time resets；
Shutdown detection module is forced, for when detecting the light curtain when preset reset time does not reset, detecting institute
State whether elevator occurs to force to close the door；
Perseveration time-obtaining module, for when detecting generation pressure at closing time, obtaining described in the light curtain correspondence
The perseveration time of current purpose floor, the perseveration time are described to detect that the light curtain has obstacle to block
Elevator occurs to force the time at closing time；
Light curtain fault detection module, for carrying out fault detect to the light curtain according to the perseveration time.
A kind of light curtain fault detection system, including：
Light curtain occlusion detection module, for after elevator reaches current purpose floor and opens the door, detecting the light curtain of the elevator
Whether there is obstacle to block；
Light curtain reset detection module, for when detecting that the light curtain has obstacle to block, detecting the light curtain pre-
If whether resetting time resets；
Shutdown detection module is forced, for when detecting the light curtain when preset reset time does not reset, detecting institute
State whether elevator occurs to force to close the door；
Perseveration time-obtaining module, for when detecting generation pressure at closing time, obtaining described in the light curtain correspondence
The perseveration time of current purpose floor, the perseveration time are described to detect that the light curtain has obstacle to block
Elevator occurs to force the time at closing time；
Light curtain faults itself detection module, for carrying out faults itself inspection to the light curtain according to the perseveration time
It surveys；
The light curtain occlusion detection module is additionally operable to detect whether the light curtain has obstacle to block in objective time interval, institute
It is that the elevator reaches the period closed the door when starting operation to the elevator after current purpose floor is opened the door to state objective time interval；
Load-carrying data acquisition module, for when no obstacle blocks the detection light curtain in objective time interval, obtaining
The elevator is in the first load-carrying data of the current purpose floor and the pre-recorded elevator in a upper purpose floor
Second load-carrying data；
Light curtain signal wire burn out detection module is used in conjunction with the first load-carrying data and the second load-carrying data to institute
It states light curtain and carries out light curtain signal wire burn out detection.
Compared with prior art, beneficial effects of the present invention are：Light curtain fault detection method of the present invention and system, work as elevator
After reaching current purpose floor enabling, if detecting, the light curtain of elevator has obstacle to block and do not have in preset reset time multiple
Position, then detect whether elevator occurs to force to close the door；If occurring to force to close the door, obtains light curtain and correspond to continuing for current purpose floor
Actuation time carries out faults itself detection according to the perseveration time to light curtain；Detect light curtain in objective time interval whether
There is obstacle to block, when no obstacle blocks detection light curtain in objective time interval, obtains elevator in the current purpose building
Layer the first load-carrying data and pre-recorded elevator a upper purpose floor the second load-carrying data, in conjunction with the first load-carrying data
Light curtain signal wire burn out detection is carried out to light curtain with the second load-carrying data, the present invention increases hardware cost without additional, actively examines
It is abnormal to measure light curtain under various states, so that maintenance staff can have found to handle in time, improve elevator device can
By property.
Description of the drawings
Fig. 1 is light curtain fault detection method flow chart one in one embodiment；
Fig. 2 is light curtain fault detection method flowchart 2 in one embodiment；
Fig. 3 is based on light curtain fault detection method flow chart in method one shown in Fig. 2 specific example；
Fig. 4 is light curtain fault detection system structural schematic diagram one in one embodiment；
Fig. 5 is light curtain fault detection system structural schematic diagram two in one embodiment.
Specific implementation mode
To make the objectives, technical solutions, and advantages of the present invention more comprehensible, with reference to the accompanying drawings and embodiments, to this
Invention is described in further detail.It should be appreciated that the specific embodiments described herein are only used to explain the present invention,
Do not limit protection scope of the present invention.
Light curtain fault detection method in one embodiment, as shown in Figure 1, including the following steps：
Step S101：After elevator, which reaches current purpose floor, to open the door, if detecting, the light curtain of the elevator has obstacle
It blocks and is not resetted in preset reset time, then detect whether the elevator occurs to force to close the door；
Here, the light curtain described in preset reset time does not reset, i.e., the light curtain described in preset reset time has always resistance
Block material blocks, and elevator door is constantly in opening state.When light curtain is normal, and the without hindrance block material of light curtain blocks, light curtain resets.
Step S102：If occurring to force to close the door, the perseveration that the light curtain corresponds to the current purpose floor is obtained
Time, the perseveration time be detect the light curtain have obstacle block the elevator occur to force at closing time when
Between；
Here, occur to force to close the door, i.e., passenger persistently presses door close button in lift car, until elevator door closes completely
It closes.
Step S103：Fault detect is carried out to the light curtain according to the perseveration time.
It is evidenced from the above discussion that light curtain fault detection method of the present invention, increases hardware cost, active detecting light without additional
Curtain is abnormal, so that maintenance staff can have found to handle in time, improves the reliability of elevator device.
Further include the accumulative pressure shutdown for updating the elevator if occurring to force to close the door in addition, in a specific example
Number；
It is more than deliberate action time threshold when the perseveration time, and the accumulative pressure shutdown number is more than default
When shutdown frequency threshold value, judge that the light curtain breaks down.
Whether the perseveration time t for comparing light curtain is more than deliberate action time threshold t0 (such as 3 minutes), adds up to force to close
Whether door number C is more than default shutdown frequency threshold value N (such as 10 times), if meeting this condition, judges that light curtain breaks down, and detects
As a result accurate, the failure is light curtain faults itself, is mainly had：Power supply damage, amplifier tube damage, luminous point damage, pcb board fracture
Deng.
Light curtain fault detection method in one embodiment, as shown in Fig. 2, including the following steps：
Step S201：After elevator, which reaches current purpose floor, to open the door, if detecting, the light curtain of the elevator has obstacle
It blocks and is not resetted in preset reset time, then detect whether the elevator occurs to force to close the door；
Here, the light curtain described in preset reset time does not reset, i.e., the light curtain described in preset reset time has always resistance
Block material blocks, and elevator door is constantly in opening state.
Step S202：If occurring to force to close the door, the perseveration that the light curtain corresponds to the current purpose floor is obtained
Time carries out faults itself detection according to the perseveration time to the light curtain, and the perseveration time is to detect
The light curtain has obstacle to block the time of the elevator generation pressure at closing time；
Here, light curtain faults itself mainly has：Power supply damage, amplifier tube damage, luminous point damage, pcb board fracture etc..
Step S203：Detect whether the light curtain has obstacle to block in objective time interval, the objective time interval is described
Elevator reaches the period closed the door when starting operation to the elevator after current purpose floor is opened the door；
Step S204：If no obstacle blocks, obtain the elevator the current purpose floor the first load-carrying number
According to the pre-recorded elevator a upper purpose floor the second load-carrying data, in conjunction with the first load-carrying data and described
Second load-carrying data carry out light curtain signal wire burn out detection to the light curtain.
It is evidenced from the above discussion that light curtain fault detection method of the present invention, increases hardware cost without additional, detects various
Light curtain under state is abnormal, so that maintenance staff can have found to handle in time, improves the reliability of elevator device.
Further include the accumulative pressure shutdown for updating the elevator if occurring to force to close the door in addition, in a specific example
Number；
It is more than deliberate action time threshold when the perseveration time, and the accumulative pressure shutdown number is more than default
When shutdown frequency threshold value, judge that faults itself occurs for the light curtain.
Whether the perseveration time t for comparing light curtain is more than deliberate action time threshold t0 (such as 3 minutes), adds up to force to close
Whether door number C is more than default shutdown frequency threshold value N (such as 10 times), if meeting this condition, judges that light curtain breaks down, and detects
As a result accurate.
In addition, in a specific example, in conjunction with the first load-carrying data and the second load-carrying data to the light
Curtain carry out light curtain signal wire burn out detection mode include：
The difference of the first load-carrying data and the second load-carrying data is calculated, the first load-carrying data are according to
Elevator determines that the second load-carrying data are according to the elevator in the building of a upper mesh in the output torque of the purpose floor
Layer output torque determine, the elevator the purpose floor output torque according to the elevator in the purpose floor
Output current and traffic direction are calculated, and the elevator exists in the output torque of a upper purpose floor according to the elevator
The output current and traffic direction of a upper purpose floor are calculated；
When the absolute value of the difference is more than preset difference value threshold value, judge that light curtain signal wire broken string occurs for the light curtain.
Output signal of traditional light curtain under each state can be concluded such as table 1：
Output signal table of 1 light curtain of table under each state
| Output type | It is unobstructed | It blocks | Power supply breaks | Communication outages | Signal breaks |
| It is normally opened | High-impedance state | High level | High level | High level | High-impedance state |
| It is normally closed | High level | High-impedance state | High-impedance state | High-impedance state | High-impedance state |
As seen from the above table, when the output type of light curtain is normally opened, light curtain signal broken string, state is high-impedance state, possible quilt
System is mistakenly considered unobstructed situation, and elevator control system can not detect.The present invention is after elevator reaches purpose floor and opens the door, inspection
Surveying light curtain does not have obstacle to block, and when elevator door, which is closed, starts operation, the load-carrying of elevator changes, and judges that light curtain signal is disconnected
Line finds the light curtain failure of elevator in time, ensures elevator safety operation.
In addition, in a specific example, when detecting the light curtain and faults itself occurring or the detection light curtain signal
It when line breaks, alarms, records the information of the fault message and the elevator of the light curtain, and by the light curtain of record
The information of fault message and the elevator is sent to elevator monitoring center, and the fault message of the light curtain is that the light curtain occurs certainly
It dies barrier or light curtain signal wire broken string, the information of the elevator includes the model of elevator, work number and position, reminding passengers electricity
Ladder, which breaks down, not reuse the elevator, while maintenance personal being notified to be repaired in time to the elevator that light curtain failure occurs,
Improve elevator reliability of operation.
The application of the above method in order to better understand, a light curtain fault detection method of the present invention detailed below is real
Example.
As shown in figure 3, may comprise steps of：
After elevator, which reaches current purpose floor, to open the door, whether detection light curtain has obstacle to block, that is, whether detects light curtain
Action；
When detecting light curtain action, entry/exit car mark K1=1 is set, detection light curtain described in preset reset time is
No reset；
If detecting the light curtain not reset, detect whether the elevator occurs to force to close the door；
If occurring to force to close the door, the perseveration time that the light curtain corresponds to the current purpose floor is obtained, institute is updated
State the accumulative pressure shutdown number of elevator；The pressure is closed the door, that is, has passenger persistently to press door close button in lift car, until
Elevator door completely closes, and when elevator door positive closing, obtains the perseveration time t of light curtain, elevator forced shutdown counter C
Add 1, counter C is reset after light curtain acts and resets；The perseveration time t of the light curtain is to detect that the light curtain has resistance
Block material blocks the elevator forced time at closing time；
Whether the perseveration time t for comparing light curtain is more than deliberate action time threshold t0 (such as 3 minutes), and elevator adds up
Force whether shutdown number C is more than default shutdown frequency threshold value N (such as 10 times)；
If meeting this condition, judge that faults itself occurs for light curtain, the faults itself mainly has：Power supply damage, amplification
Pipe damage, luminous point damage, pcb board fracture etc.；It forces after the completion of closing the door, elevator can continue to run with；
Detect whether above-mentioned light curtain has obstacle to block in objective time interval, the objective time interval is that elevator arrival mesh is current
Floor open the door after to the elevator close the door start operation when period；
If no obstacle blocks, that is, detects light curtain and do not act, setting entry/exit car mark K1=0；
In default opening time T0, elevator forced shutdown, otherwise, when the opening time T of elevator is greater than or equal to default open
Door time T0, elevator automatic door-closing；When elevator, which is closed the door, starts operation, the elevator is obtained the of the current purpose floor
The second load-carrying data L0 of one load-carrying data L and a pre-recorded upper purpose floor, such as it is 5 that elevator, which reaches purpose floor,
Building, a purpose floor is 2 buildings on elevator, when elevator, which is closed the door, starts operation, obtains the load-carrying data and note in advance of 5 building, elevator
2 buildings load-carrying data of record；Elevator obtains in the following manner in 5 buildings load-carrying data：Output first according to elevator at 5 buildings
Electric current and traffic direction calculate output torque of the elevator at 5 buildings, and then the output torque according to elevator at 5 buildings obtains elevator 5
The load-carrying data L in building, elevator 2 buildings load-carrying data similarly；
Calculate elevator the purpose floor load-carrying data L and acquisition elevator a upper purpose floor load-carrying number
According to the difference of L0；Calculate elevator 5 buildings load-carrying data and acquisition elevator 2 buildings load-carrying data difference；
When the absolute value of the difference is more than preset difference value threshold value, entry/exit car mark K2=1 is set, is otherwise arranged
Entry/exit car mark K2=0；Preset difference value threshold value is arranged according to calculating error of the elevator in purpose floor load-carrying data is calculated,
When elevator is small in the difference of the load-carrying data of a upper purpose floor in the load-carrying data of the purpose floor and the elevator of acquisition
When preset difference value threshold value, it is believed that elevator loading does not change, and when above-mentioned difference is more than preset difference value threshold value, illustrates electricity
Terraced load-carrying changes；
The data splitting of K1, K2 are as shown in table 2：
The data splitting table of table 2K1, K2
As K1=0 and K2=1, illustrate that light curtain attonity, load-carrying change, if from the data in table 1, it can be seen that light curtain signal wire is disconnected
Line, light curtain signal are consistent with state of light curtain when unobstructed, i.e. light curtain attonity, so work as K1=0, and K2=1, i.e. light
Curtain attonity, load-carrying change, judgement light curtain signal wire broken string.Elevator keeps opening the door after reaching purpose floor leveling opening, electricity
Ladder is in run-stopping status.Elevator can be made to close the door, elevator by Continued depression car door close button to continue to run with passenger
Operation can be started.
When detecting the light curtain generation faults itself or light curtain signal wire breaks, alarms, record the light curtain
The information of fault message and the elevator, and the information of the fault message of the light curtain of record and the elevator is sent to electricity
The fault message of terraced monitoring center, the light curtain is that faults itself or light curtain signal wire broken string, the elevator occur for the light curtain
Information include elevator model, work number and position, reminding passengers elevator failure not reuse the elevator, notify simultaneously
Maintenance personal in time repairs the elevator that light curtain failure occurs, and ensures elevator safety operation.
It is evidenced from the above discussion that the present embodiment is after elevator reaches current purpose floor and opens the door, if detecting the light of elevator
Curtain has obstacle to block and do not resetted in preset reset time, then detects whether elevator occurs to force to close the door；If forcing
It closes the door, then obtains light curtain and correspond to the perseveration time of current purpose floor, and update the accumulative shutdown number of elevator, according to institute
The accumulative shutdown number for stating perseveration time and elevator carries out faults itself detection to light curtain；Light curtain is detected in objective time interval
Whether there is obstacle to block, when no obstacle blocks detection light curtain in objective time interval, obtains elevator in the current mesh
Floor the first load-carrying data and pre-recorded elevator a upper purpose floor the second load-carrying data, in conjunction with the first load-carrying
Data and the second load-carrying data carry out light curtain signal wire burn out detection to light curtain, and the present invention increases hardware cost, inspection without additional
It is abnormal to measure light curtain under various states, so that maintenance staff can have found to handle in time, improve elevator device can
By property.
Light curtain fault detection system in one embodiment, as shown in figure 4, including：
Light curtain occlusion detection module 401, for after elevator reaches current purpose floor and opens the door, detecting the light of the elevator
Whether curtain has obstacle to block；
Light curtain reset detection module 402 exists for when detecting that the light curtain has obstacle to block, detecting the light curtain
Whether preset reset time resets；
Shutdown detection module 403 is forced, for when detecting the light curtain when preset reset time does not reset, detecting
Whether the elevator occurs to force to close the door；
Perseveration time-obtaining module 404, for when detecting generation pressure at closing time, obtaining the light curtain and corresponding to institute
State the perseveration time of current purpose floor, the perseveration time is detects that the light curtain has obstacle to block institute
Elevator is stated to occur to force the time at closing time；
Light curtain fault detection module 405, for carrying out fault detect to the light curtain according to the perseveration time.
As shown in figure 4, in a specific example, the light curtain fault detection system further includes the accumulative update of shutdown number
Module 406, for when detecting generation pressure at closing time, updating the accumulative pressure shutdown number of the elevator；
It is more than deliberate action time threshold when the perseveration time, and the accumulative pressure shutdown number is more than default
When shutdown frequency threshold value, the light curtain fault detection module 405 judges that the light curtain breaks down.
Whether the perseveration time t for comparing light curtain is more than deliberate action time threshold t0 (such as 3 minutes), adds up to force to close
Whether door number C is more than default shutdown frequency threshold value N (such as 10 times), if meeting this condition, judges that light curtain breaks down, and detects
As a result accurate, the failure is light curtain faults itself, is mainly had：Power supply damage, amplifier tube damage, luminous point damage, pcb board fracture
Deng.
It is evidenced from the above discussion that light curtain fault detection system of the present invention, increases hardware cost, active detecting light without additional
Curtain is abnormal, so that maintenance staff can have found to handle in time, improves the reliability of elevator device.
Light curtain fault detection system in one embodiment, as shown in figure 5, including：
Light curtain occlusion detection module 501, for after elevator reaches current purpose floor and opens the door, detecting the light of the elevator
Whether curtain has obstacle to block；
Light curtain reset detection module 502 exists for when detecting that the light curtain has obstacle to block, detecting the light curtain
Whether preset reset time resets；
Shutdown detection module 503 is forced, for when detecting the light curtain when preset reset time does not reset, detecting
Whether the elevator occurs to force to close the door；
Perseveration time-obtaining module 504, for when detecting generation pressure at closing time, obtaining the light curtain and corresponding to institute
State the perseveration time of current purpose floor, the perseveration time is detects that the light curtain has obstacle to block institute
Elevator is stated to occur to force the time at closing time；
Light curtain faults itself detection module 505, for the light curtain die certainly according to the perseveration time
Barrier detection；
The light curtain occlusion detection module 501 is additionally operable to detect whether the light curtain has obstacle screening in objective time interval
Gear, the objective time interval be the elevator reach after current purpose floor is opened the door to the elevator close the door when starting operation when
Section；
Load-carrying data acquisition module 506, for when no obstacle blocks the detection light curtain in objective time interval, obtaining
Take the elevator in the first load-carrying data of the current purpose floor and the pre-recorded elevator in a upper purpose floor
The second load-carrying data；
Light curtain signal wire burn out detection module 507, in conjunction with the first load-carrying data and the second load-carrying data
Light curtain signal wire burn out detection is carried out to the light curtain.
As shown in figure 5, in a specific example, the light curtain fault detection system further includes the accumulative update of shutdown number
Module 508, for when detecting generation pressure at closing time, updating the accumulative pressure shutdown number of the elevator；
It is more than deliberate action time threshold when the perseveration time, and the accumulative pressure shutdown number is more than default
When shutdown frequency threshold value, the light curtain faults itself detection module 505 judges that faults itself occurs for the light curtain.
Whether the perseveration time t for comparing light curtain is more than deliberate action time threshold t0 (such as 3 minutes), adds up to force to close
Whether door number C is more than default shutdown frequency threshold value N (such as 10 times), if meeting this condition, judges that light curtain breaks down, and detects
As a result accurate.
As shown in figure 5, in a specific example, the light curtain signal wire burn out detection module 507 includes：
Load-carrying difference computational unit 5071, the difference for calculating the first load-carrying data and the second load-carrying data
Value, the first load-carrying data are according to the elevator in the output torque determination of the purpose floor, the second load-carrying data
According to the elevator in the output torque determination of a upper purpose floor, output torque of the elevator in the purpose floor
Output current and traffic direction according to the elevator in the purpose floor are calculated, and the elevator is in a upper purpose
Output current and traffic direction of the output torque of floor according to the elevator in a upper purpose floor are calculated；
Light curtain signal wire burn out detection unit 5072 is used for when the absolute value of the difference is more than preset difference value threshold value,
Judge that light curtain signal wire broken string occurs for the light curtain.
As shown in Table 1, when the output type of light curtain is normally opened, light curtain signal broken string, state is high-impedance state, may is
System is mistakenly considered unobstructed situation, and elevator control system can not detect.The present invention is after elevator reaches purpose floor and opens the door, detection
Light curtain does not have obstacle to block, and when elevator, which is closed, starts operation, the load-carrying of elevator changes, judgement light curtain signal broken string, and
The light curtain failure of Shi Faxian elevators ensures elevator safety operation.
In addition, in a specific example, the light curtain fault detection system further includes light curtain exception processing module, is used for
When detecting the light curtain and faults itself occurring or when the detection light curtain signal breaks, alarms, record the light curtain
The information of fault message and the elevator, and the information of the fault message of the light curtain of record and the elevator is sent to electricity
The fault message of terraced monitoring center, the light curtain is that faults itself or light curtain signal broken string, the electricity occur for the light curtain
The information of ladder includes model, work number and the position of elevator, and the failure of reminding passengers elevator not reuse the elevator, lead to simultaneously
Know that maintenance personal in time repairs the elevator that light curtain failure occurs, improves elevator reliability of operation.
It is evidenced from the above discussion that light curtain fault detection system of the present invention, increases hardware cost without additional, detects various
Light curtain under state is abnormal, so that maintenance staff can have found to handle in time, improves the reliability of elevator device.
Each technical characteristic of embodiment described above can be combined arbitrarily, to keep description succinct, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, it is all considered to be the range of this specification record.
Several embodiments of the invention above described embodiment only expresses, the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the protection of the present invention
Range.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (6)
1. a kind of light curtain fault detection method, which is characterized in that include the following steps：
After elevator, which reaches current purpose floor, to open the door, if detecting, the light curtain of the elevator has obstacle to block and default multiple
The position time does not reset, then detects whether the elevator occurs to force to close the door；
If occurring to force to close the door, obtains the light curtain and correspond to the perseveration time of the current purpose floor, and update institute
The accumulative pressure shutdown number of elevator is stated, the perseveration time is to detect that the light curtain has obstacle to block the electricity
Ladder occurs to force the time at closing time；
It is more than deliberate action time threshold when the perseveration time, and the accumulative pressure shutdown number is more than default close the door
When frequency threshold value, judge that the light curtain breaks down.
2. a kind of light curtain fault detection method, which is characterized in that include the following steps：
After elevator, which reaches current purpose floor, to open the door, if detecting, the light curtain of the elevator has obstacle to block and default multiple
The position time does not reset, then detects whether the elevator occurs to force to close the door；
If occurring to force to close the door, obtains the light curtain and correspond to the perseveration time of the current purpose floor, and update institute
The accumulative pressure shutdown number of elevator is stated, the perseveration time is to detect that the light curtain has obstacle to block the electricity
Ladder occurs to force the time at closing time；It is more than deliberate action time threshold, and the accumulative pressure when the perseveration time
When shutdown number is more than default shutdown frequency threshold value, judge that faults itself occurs for the light curtain；
Detect whether the light curtain has obstacle to block in objective time interval, the objective time interval is that the elevator reaches current mesh
Floor open the door after to the elevator close the door start operation when period；
If no obstacle blocks, the elevator is obtained in the first load-carrying data of the current purpose floor and pre-recorded
The elevator a upper purpose floor the second load-carrying data, in conjunction with the first load-carrying data and the second load-carrying data pair
The light curtain carries out light curtain signal wire burn out detection.
3. light curtain fault detection method according to claim 2, which is characterized in that in conjunction with the first load-carrying data and institute
State the second load-carrying data includes to the mode of light curtain progress light curtain signal wire burn out detection：
The difference of the first load-carrying data and the second load-carrying data is calculated, the first load-carrying data are according to the elevator
Determine that the second load-carrying data are according to the elevator in a upper purpose floor in the output torque of the purpose floor
Output torque determine, the elevator the purpose floor output torque according to the elevator the purpose floor output
Electric current and traffic direction are calculated, the elevator a upper purpose floor output torque according to the elevator described
The output current and traffic direction of a upper purpose floor are calculated；
When the absolute value of the difference is more than preset difference value threshold value, judge that light curtain signal wire broken string occurs for the light curtain.
4. a kind of light curtain fault detection system, which is characterized in that including：
Light curtain occlusion detection module, for after elevator reaches the enabling of current purpose floor, detect the elevator light curtain whether
There is obstacle to block；
Light curtain reset detection module, for when detecting that the light curtain has obstacle to block, detecting the light curtain default multiple
Whether the position time resets；
Shutdown detection module is forced, for when detecting that the light curtain when preset reset time does not reset, detects the electricity
Whether ladder occurs to force to close the door；
Perseveration time-obtaining module, for when detect generation force at closing time, obtain the light curtain corresponds to it is described currently
The perseveration time of purpose floor, the perseveration time are to detect that the light curtain has obstacle to block the elevator
Occur to force the time at closing time；
Shutdown number adds up update module, for when detecting generation pressure at closing time, the accumulative pressure for updating the elevator to be closed
Door number；
Light curtain fault detection module is held for carrying out fault detect to the light curtain according to the perseveration time when described
Continuous actuation time is more than deliberate action time threshold, and accumulative the pressures shutdown number is more than when presetting shutdown frequency threshold value,
The light curtain faults itself detection module judges that faults itself occurs for the light curtain.
5. a kind of light curtain fault detection system, which is characterized in that including：
Light curtain occlusion detection module, for after elevator reaches the enabling of current purpose floor, detect the elevator light curtain whether
There is obstacle to block；
Light curtain reset detection module, for when detecting that the light curtain has obstacle to block, detecting the light curtain default multiple
Whether the position time resets；
Shutdown detection module is forced, for when detecting that the light curtain when preset reset time does not reset, detects the electricity
Whether ladder occurs to force to close the door；
Perseveration time-obtaining module, for when detect generation force at closing time, obtain the light curtain corresponds to it is described currently
The perseveration time of purpose floor, the perseveration time are to detect that the light curtain has obstacle to block the elevator
Occur to force the time at closing time；
Shutdown number adds up update module, for when detecting generation pressure at closing time, the accumulative pressure for updating the elevator to be closed
Door number；
Light curtain faults itself detection module, for carrying out faults itself detection to the light curtain according to the perseveration time,
It is more than deliberate action time threshold when the perseveration time, and the accumulative pressure shutdown number is more than default shutdown number
When threshold value, the light curtain faults itself detection module judges that faults itself occurs for the light curtain；
The light curtain occlusion detection module is additionally operable to detect whether the light curtain has obstacle to block in objective time interval, the mesh
The mark period is that the elevator reaches the period closed the door when starting operation to the elevator after current purpose floor is opened the door；
Load-carrying data acquisition module, for when detecting the light curtain no obstacle blocking in objective time interval, described in acquisition
Elevator is in the first load-carrying data of the current purpose floor and the pre-recorded elevator the second of a upper purpose floor
Load-carrying data；
Light curtain signal wire burn out detection module is used in conjunction with the first load-carrying data and the second load-carrying data to the light
Curtain carries out light curtain signal wire burn out detection.
6. light curtain fault detection system according to claim 5, which is characterized in that the light curtain signal wire burn out detection mould
Block includes：
Load-carrying difference computational unit, the difference for calculating the first load-carrying data and the second load-carrying data, described
Output torque of the one load-carrying data according to the elevator in the purpose floor determines that the second load-carrying data are according to the electricity
Ladder a upper purpose floor output torque determine, the elevator the purpose floor output torque according to the electricity
Ladder is calculated in the output current and traffic direction of the purpose floor, output of the elevator in a upper purpose floor
Output current and traffic direction of the torque according to the elevator in a upper purpose floor are calculated；
Light curtain signal wire burn out detection unit is used for when the absolute value of the difference is more than preset difference value threshold value, described in judgement
Light curtain signal wire broken string occurs for light curtain.
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| CN108059068B (en) * | 2017-12-12 | 2019-07-12 | 日立楼宇技术（广州）有限公司 | Light curtain detection threshold value generation method, device and system |
| CN109969892A (en) * | 2019-04-01 | 2019-07-05 | 日立楼宇技术（广州）有限公司 | A kind of processing method and relevant device based on elevator light curtain |
| CN112693987B (en) * | 2020-12-15 | 2022-12-06 | 日立楼宇技术（广州）有限公司 | Method for cleaning elevator and robot |
| CN112758795A (en) * | 2021-01-06 | 2021-05-07 | 上海新时达电气股份有限公司 | Elevator control method, elevator, and storage medium |
| CN113624450B (en) * | 2021-06-21 | 2022-07-12 | 广州安协科技股份有限公司 | Testing method and system for correlation light curtain |
| CN116183181B (en) * | 2023-04-13 | 2023-07-04 | 伟龙意程智能科技(江苏)有限公司 | Elevator light curtain beam testing method and device |
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| CN202988507U (en) * | 2012-11-30 | 2013-06-12 | 广州日滨科技发展有限公司 | Light curtain control system |
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