The image alignment device of the driver's video monitoring system being controlled based on circuitTechnical field
The invention belongs to driver's video monitoring system technical field, more particularly to a kind of driving based on circuit controlThe image alignment device of member's video monitoring system and alignment methods.
Background technology
With government department, the attention of road traffic safety management is constantly strengthened and car networking technology, Vehicular intelligent safetyThe continuous lifting of level, driver's video monitoring system has been widely used for passenger train, freight, bus, carriage of special cargoOn the various such as vehicle.This system mainly gathers driver's face-image by camera, and application image treatment technology comesRealize fatigue driving detection, driver attention's state-detection, smoking, dial the/monitoring content such as answering cell phone, by drivingWhen member drives, the supervision of unlawful practice, can prevent and treat traffic accident, guarantee driving safety effectively.
During the rigging up and debugging of driver's video monitoring system, an important step is driver's facial imageAcquisition be aligned, that is, driver's facial image necessarily be in the effective of guarantee IMAQ in the middle part of the visual field of monitoring cameraProperty and follow-up identification accuracy.At this stage, what Image Acquisition be aligned was commonly used is the method that externally connected with display screen checks image,Connect extra display screen and carry out video frequency output in the equipment of installation, by whether observing facial image in display screen centerTo judge whether camera position is aligned, this method undoubtedly increases the installation complexity of equipment, to whole systemPopularization and application create impact.The present invention is therefore.
Content of the invention
Multiple for checking that image carries out the installation operation that this conventional method of camera position adjustment brings by display screenMiscellaneous, extras need to be assembled, the problems such as manpower and materials expend big, the present invention is proposed and a kind of is regarded based on the driver of circuit controlThe image alignment device of frequency monitoring system and alignment methods, enormously simplify the installation and debugging process of equipment, even if not having specialtyIn particular cases, driver can also oneself be adjusted installation personnel according to demand.This modular construction is simple, low cost,And do not interfere with equipment overall appearance, there is high application value.
The technical scheme is that
A kind of image alignment device of the driver's video monitoring system based on circuit control, including driver's video monitoring systemWith the camera being connected electrically, described camera is connected support by universal regulating mechanism, and described camera passes through solidFixed rack is arranged on driver's cabin front end, and the processor signal output end of described driver's video monitoring system is by control circuit evenSending and receiving optical diode, described processor is used for judging the facial image of camera shooting whether in the middle part of camera visual field, describedControl circuit is used for for image alignment being converted to high/low two kinds of level signals, if facial image is in the middle part of camera visual field,Control circuit output high level signal, light emitting diode does not light；Otherwise, control circuit output high level signal, light-emitting diodesPipe is luminous.
Preferably, described control circuit includes a triode, and the colelctor electrode of described triode is connected by light emitting diodeCollector voltage, the grounded emitter of described triode, base stage connects the processor signal output of driver's video monitoring systemEnd, described processor signal output end connects pull down resistor.
Preferably, described camera and driver's video monitoring system are encapsulated in inside the shell, and described shell passes through universal tuneSection mechanism is connected support, and described case surface is provided with a cavity, and described cavity is used for being embedded in light emitting diode.
Preferably, described light emitting diode is as prior-warning device, when driver's video monitoring system monitors that driver depositsVision early warning is provided in dangerous driving behavior.
The invention also discloses a kind of image registration methods of the image alignment device of the use present invention, walk including followingRapid:
S01: camera is fixed on predeterminated position, upper electricity collection facial image；
S02: if facial image is not in the middle part of camera visual field, control circuit output low level signal, lumination of light emitting diode, adjustSection universal regulating mechanism, when light emitting diode extinguishes, the fixing firm part of fixed support.
Compared with prior art, the invention has the advantage that
1st, image alignment is converted to high/low two kinds of different level signals by the present invention, sending out by varying level signalSend the light on and off controlling light emitting diode.The light on and off that installation personnel only need to observe light emitting diode can determine whether whether camera is rightQuasi- face, then angle adjustment is carried out to camera by camera governor motion.
2nd, image registration methods of the present invention enormously simplify the installation and debugging process of equipment, even if not having qualified installation personIn particular cases, driver can also oneself be adjusted according to demand.This modular construction is simple, low cost, and will not shadowRing equipment overall appearance, reduce the installation cost of monitoring kind equipment, there is high application value.This device also can produceUse during product follow-up maintenance, provide facility for after-sale service.
Brief description
Below in conjunction with the accompanying drawings and embodiment the invention will be further described:
Fig. 1 is a kind of structural representation of the image alignment device of the driver's video monitoring system based on circuit control of the present inventionFigure；
Fig. 2 is the circuit diagram of the control circuit of the present invention；
Fig. 3 is a kind of workflow of the image registration methods of the driver's video monitoring system based on circuit control of the present inventionFigure.
Specific embodiment
For making the object, technical solutions and advantages of the present invention of greater clarity, with reference to specific embodiment and joinAccording to accompanying drawing, the present invention is described in more detail.It should be understood that these descriptions are simply exemplary, and it is not intended to limit thisBright scope.Additionally, in the following description, eliminate the description to known features and technology, to avoid unnecessarily obscuring thisThe concept of invention.
Embodiment:
Below in conjunction with the accompanying drawings, presently preferred embodiments of the present invention is described further.
A kind of image alignment device of the driver's video monitoring system based on circuit control, including driver's video monitoringSystem and the camera being connected electrically, camera passes through universal regulating mechanism and is connected support, and camera passes through fixing propping upFrame is arranged on driver's cabin front end, and the processor signal output end of driver's video monitoring system connects luminous two by control circuitPole pipe.
Processor is used for judging the facial image of camera shooting whether in the middle part of camera visual field, control circuit is used for willImage alignment is converted to high/low two kinds of level signals, if facial image is in the middle part of camera visual field, control circuit output is highLevel signal, light emitting diode does not light；Otherwise, control circuit output high level signal, lumination of light emitting diode.
Give a kind of preferred embodiment as shown in Figure 1, camera 11 and driver's video monitoring system encapsulate outsideIn shell 10, shell 10 is connected support 14 by universal regulating mechanism 13, and shell 10 is provided with a cavity, and cavity is used for embeddingDress light emitting diode 12.
As shown in Fig. 2 control circuit includes a triode, the colelctor electrode of triode connects colelctor electrode by light emitting diodeVoltage, the grounded emitter of triode, base stage connects the processor signal output end of driver's video monitoring system, and processor is believedNumber output end connects pull down resistor.
Preferably, light emitting diode is also used as prior-warning device, when driver's video monitoring system monitors driverExist fatigue driving, dispersion attention, smoking, dial/dangerous driving behavior such as answering cell phone when vision early warning is provided, light twoThe light on and off frequency of pole pipe can be adjusted.
Using magnetic universal adjustment structure or there is the corresponding mechanism adjusting the free degree as calibration apparatus, this structure design letterSingle, flexible operation, easily can carry out pitching and left rotation and right rotation etc. to camera according to image conditions in convex reflecting mirror and freely adjustSection.
As shown in figure 3, the image be aligned adjusting process of driver's video monitoring system is as follows:
(1) supervising device is fixed on installation site set in advance by installation personnel, and human pilot keeps normal driving sitting posture；
(2) system electrification, camera gathers driver's facial image；
(3) when camera successfully be detected face, camera passes through control circuit and sends height to light emitting diode controlling switchLevel signal, light emitting diode is in OFF state, shows that now camera position is adjusted；
(4) when camera fails to detect face, it is low to the transmission of light emitting diode controlling switch that camera passes through control circuitLevel signal, lumination of light emitting diode, show that now camera position is not adjusted, installation personnel passes through camera governor motionAdjust the camera angle of pitch and left and right angle, until when light emitting diode extinguishes, adjustment completes；
(5) after the completion of camera position adjustment, by firm part fixing camera position.
It should be appreciated that the above-mentioned specific embodiment of the present invention is used only for exemplary illustration or explains the present invention'sPrinciple, and be not construed as limiting the invention.Therefore, that is done in the case of without departing from the spirit and scope of the present invention is anyModification, equivalent, improvement etc., should be included within the scope of the present invention.Additionally, claims purport of the present inventionCovering the whole changes falling in scope and border or the equivalents on this scope and border and repairChange example.