Subway shield door gauge area intelligent anti-clip detection warning device and methodTechnical field
The present invention relates to metro safety technical field, more particularly to a kind of subway shield door gauge area intelligent anti-clip detection reportAlarm device and method.
Background technology
Subway shield door is the subject such as item collection building, machinery, material, electronics and information in the high-tech product of one,It is used in subway platform.Shield door separates platform and train operation region, controls its automatic opening by control system, mainlyEnsure safety when train, passenger are out of the station.Slit between subway shield door and train door is known as gauge area, this gauge areaBe ensure subway train safe operation necessary to.Once folder people, which occurs, for the limit within battery limit between shield door and train door presss from both sides thing,If train travel can cause great security incident at this time, therefore very necessary searching one kind can detect subway shield door and rowWithin battery limit is limited between car door the method that folder people presss from both sides thing occurs.
What subway system mainly used at present has three kinds of schemes, infrared exoelectron fence, light bar observation and installation anti-pinch baffle.Wherein for infrared exoelectron fence mainly using infrared emission pipe to detecting whether that someone or thing block infrared light, this method is mainIt is related with the infrared emission pipe mode installed to be limited to its detection resolution, and the program is not suitable for crescent platform, withVibrations when subway train operation cause the deviation of infrared emission pipe to cause very high false alarm rate.Light bar observation method is mainlyOne straight LED lamp band is installed in shield door lower edge, by observation of the train driver to light bar to determine whether there is folder peoplePrinciple condition is pressed from both sides, this method is mainly the subjective judgement by driver, adds the mental burden of driver, and this method is notSuitable for crescent platform.Install additional anti-pinch baffle method, can only test limit battery limit (BL) bottom space detection, for backpack strip thisKind press from both sides principle shape higher than the folder people of height of baffle plate and can not detect, and baffle can cause it is certain invade boundary, the safety to train is transportedRow leaves hidden danger.
The content of the invention
In view of this, the present invention propose a kind of accuracy of detection is high, false alarm rate is low, to straight line platform and crescent platform allThe subway shield door gauge area intelligent anti-clip detection warning device and method that can be used.
The technical proposal of the invention is realized in this way：On the one hand, the present invention provides a kind of subway shield door gauge areaIntelligent anti-clip detects warning device, it includes laser emitting module, laser detection module and analysis processor, laser emitting moduleIncluding laser, collimation lens and linear optical generator, laser detection module includes convergent lens, narrow band pass filter and photoelectricityDetector, wherein,
Laser, falls in the focus of collimation lens primary optical axis, sends laser；
Collimation lens, is converted into a shaped laser spot by incident laser and is emitted；
Linear optical generator, is converted into wire hot spot by incidence point shaped laser spot and is incident upon gauge area；
Convergent lens, focuses on the wire hot spot reflected through barrier in gauge area；
Photodetector, is arranged at the focal plane position of convergent lens；
Narrow band pass filter, is arranged in the light path between convergent lens and photodetector；
Analysis processor, is connected with photo detector signal, and the signal of photodetector collection is analyzed, calculates limitThe real-time range of within battery limit barrier and laser emitting module, and real-time range and the difference of pre-determined distance are calculated, when the differenceAlarm signal is sent when value is beyond the threshold value of setting, otherwise provides traffic safety signal.
On the basis of above technical scheme, it is preferred that laser is semiconductor laser；Collimation lens is aspherical standardStraight lens or spherical lens；Linear optical generator is Bao Weier lens, cylindrical lens or wave lens.
On the basis of above technical scheme, it is preferred that the laser emitting module is fixed on screen door topTrain door centre position, the wire hot spot of linear optical generator projection fall on the center line on gauge area ground.
On the other hand, the present invention provides a kind of subway shield door gauge area intelligent anti-clip to detect alarm method, it is usedSubway shield door gauge area intelligent anti-clip detection warning device described in first aspect present invention, analysis processor detection subway rowThe signal that car and shield door close the door and open the door, after the signal that subway train and shield door are closed the door is received, laser sends sharpLight pulse, analysis processor detect and calculate the time difference Δ t that laser sends through laser, is received by a photoelectric detector again,And the distance of barrier and laser emitting module in gauge area is calculated according to time difference Δ t.
On the basis of above technical scheme, it is preferred that calculate the distance of barrier and laser emitting module in gauge areaFormula is as follows,
Wherein, c is the light velocity in air, and D is limited the distance of within battery limit barrier and laser emitting module.
On the basis of above technical scheme, it is preferred that before each Train Stopping opens the door, calculate in gauge area barrier withThe distance of laser emitting module as pre-determined distance, in gauge area the real-time range of barrier and laser emitting module with it is lastMeasure obtained pre-determined distance to be compared and calculate the difference of the two, alarm is sent when threshold value of the difference beyond settingSignal, otherwise provides traffic safety signal.
The subway shield door gauge area intelligent anti-clip detection warning device and method of the present invention is not only suitable for subway shieldDoor, is also applied for the safety detection of elevator door.
The subway shield door gauge area intelligent anti-clip detection warning device and method of the present invention has relative to the prior artFollowing beneficial effect：
(1) laser emitting module, laser detection module and analysis processor are set, realized using laser ranging to gauge areaDetection, without mechanical gyro unit, improve system stability；
(2) Train Stopping demarcates gauge area before opening the door every time, updates pre-determined distance, corrects train operation automaticallyRanging offset caused by Shi Zhendong causes ranging offset influences, precision higher；
(3) rung using narrow band pass filter filter background shadow, the veiling glare of passenger in compartment and luggage are excluded automaticallyAlert outside region, false alarm rate is low；
(4) the configuration of the present invention is simple, it is cheap, detection alarm is completed using algorithm, reduces artificial maintenance and detectionHardware device, has the advantages of accuracy of detection is high, and false alarm rate is low, and detection alarm can be also realized for minimum obstacle target, rightStraight line platform and crescent platform can use.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existingThere is attached drawing needed in technology description to be briefly described, it should be apparent that, drawings in the following description are only thisSome embodiments of invention, for those of ordinary skill in the art, without creative efforts, can be withOther attached drawings are obtained according to these attached drawings.
Fig. 1 is the testing principle schematic diagram that subway shield door gauge area intelligent anti-clip of the present invention detects warning device.
Embodiment
Below in conjunction with the attached drawing in embodiment of the present invention, the technical solution in embodiment of the present invention is carried out clearChu, be fully described by, it is clear that described embodiment only a part of embodiment of the present invention, rather than whole realitiesApply mode.Based on the embodiment in the present invention, those of ordinary skill in the art institute without making creative workThe every other embodiment obtained, belongs to the scope of protection of the invention.
The subway shield door gauge area intelligent anti-clip detection warning device of the present invention, as shown in Figure 1, it includes Laser emissionModule 1, laser detection module 2 and analysis processor 3.
Laser emitting module 1, sends wire hot spot and is incident upon gauge area.Specifically, it includes laser 11, collimation thoroughlyMirror 12 and linear optical generator 13.
Laser 11, falls in the focus of 12 primary optical axis of collimation lens, sends laser pulse.Specifically, laser 11 canUsing semiconductor laser, it is preferred to use the infrared semiconductor laser of eye-safe.
Collimation lens 12, is collimated into a shaped laser spot by the point-like laser pulse of laser 11 and is emitted, laser 11 falls in standardIn the focus of 12 primary optical axis of straight lens.Specifically, collimation lens 12 is aspheric collimation lens or spherical lens.
Linear optical generator 13, is converted into wire hot spot by incidence point shaped laser spot and is incident upon gauge area.Specifically, throughThe point shaped laser spot for crossing the outgoing of collimation lens 12 falls on the center of linear optical generator 13.Linear optical generator 13 isBao Weier lens, cylindrical lens or wave lens.
By setting laser 11, collimation lens 12 and linear optical generator 13, laser 11 launches a laserPulse, a narrow light belt is expanded into after collimation lens 12 and linear optical generator 13 and is radiated at gauge area.Specifically, the laser emitting module 1 is fixed on the train door centre position on screen door top, and linear optical generator 13 projectsWire hot spot fall on the center line on gauge area ground.
Laser detection module 2, detects the laser pulse reflected through barrier.It includes convergent lens 21, narrow band pass filter22 and photodetector 23.22 main filtration of narrow band pass filter falls the interference of bias light.
Photodetector 23, is arranged at the focal plane position of convergent lens 21；
Narrow band pass filter 22, is arranged in the light path between convergent lens 21 and photodetector 23；
Analysis processor 3, is connected with 23 signal of photodetector, and the signal gathered to photodetector 23 is analyzed,The real-time range of barrier and laser emitting module 1 in gauge area is calculated, and calculates real-time range and the difference of pre-determined distance, whenAlarm signal is sent when the difference is beyond the threshold value of setting, otherwise provides traffic safety signal.In this way, in the barrier of limit within battery limitHinder thing to laser pulse reflection echo signal after the convergence of convergent lens 21, done by eliminating bias light after narrow band pass filter 22Disturb, into photodetector 23, the laser pulse reflection echo signal received is converted into electric signal by photodetector 23When amplification, shaping through oversampling circuit, mirror and the processing of the when of survey draws the time difference Δ t for receiving signal and launching signal, utilizes airMiddle light velocity c is constant, and barrier can be calculated from 1 distance D of laser emitting module using time-of-flight：
Specifically, analysis processor 3 detects the signal that subway train and shield door close the door and open the door, subway row are being receivedAfter the signal that car and shield door are closed the door, laser 11 sends laser pulse, and analysis processor 3 detects and calculates laser through laserThe 11 time difference Δ t for sending, being received again by photodetector 23, and according to time difference Δ t calculate in gauge area barrier withThe distance of laser emitting module 1.
In this way, nobody and object by when, the barrier is limited battery limit (BL) ground, and pre-determined distance and real-time range are equalBe limited battery limit (BL) ground and the distance of laser emitting module 1, and pre-determined distance is less than threshold value, analysis processor 3 with real-time range differenceProvide traffic safety signal；When someone or object by when, the barrier is limited the people or object that within battery limit passes through, preset away fromWith a distance from be limited battery limit (BL) ground and laser emitting module 1, real-time range is limited people that within battery limit passes through or object is sent out with laserThe distance of module 1 is penetrated, pre-determined distance is more than threshold value with real-time range difference, and analysis processor 3 provides alarm signal and gives train controlSystem processed, prompts limit within battery limit to have barrier, avoids train door and shield door from carrying out door-closing operation by force, prevent from crushing passenger andForbid train travel, improve subway circulation security.
The vibrations occurred in train operation can cause pre-determined distance to shift, so as to cause to calculate analysis appearance partiallyDifference.Therefore, iron shield thresholding battery limit (BL) intelligent anti-clip detection alarm method of the invention, before each Train Stopping opens the door, calculates limitThe distance of within battery limit barrier and laser emitting module 1 is used as pre-determined distance, barrier and laser emitting module 1 in gauge areaReal-time range is compared with the pre-determined distance that last measurement obtains and calculates the difference of the two, when the difference is beyond settingThreshold value when send alarm signal；Otherwise traffic safety signal is provided.
In this way, before the analysis processor 3 has the function of that intelligence learning, each Train Stopping are opened the door, obstacle in gauge areaThing is limited battery limit (BL) ground, the distance of barrier and laser emitting module 1 in gauge area is calculated as pre-determined distance, so as to eliminate rowThe vibrations that occur can cause pre-determined distance to shift caused accuracy error when car is run.
The foregoing is merely the better embodiment of the present invention, it is not intended to limit the invention, it is all the present invention'sWithin spirit and principle, any modification, equivalent replacement, improvement and so on, should all be included in the protection scope of the present invention.