CN201233208Y - Automobile position auto-induction apparatus - Google Patents

Abstract

The utility model discloses an automatic automobile position-sensing device. The device comprises at least three automobile position sensors; wherein, the first automobile position sensor, the second automobile position sensor and the third automobile position sensor are respectively buried in the pavement before the detected automobile traveling into the station of a headlight detector; the first and the second automobile position sensors are mounted vertical to a left driving datum line and a right driving datum line; the distances between the first and the second automobile position sensors and a guideway of the automotive headlight detector are equal; the third automobile position sensor is located in front of or behind the first and the second automobile position sensors and mounted vertical to any one of the left and the right driving datum lines; and automobile position-sensing units are mounted on each automobile position sensor. The device can automatically sense the position of the detected automobile and automatically compute the deviation angle between the traveling direction of the detected automobile and the traveling datum lines of detection lines in order to correct headlight detection data, so that the error of the detection data can be greatly reduced. The structure of the device is simple, the occupied volume of the device is less, and the cost is greatly reduced.

Description

Automobile position auto-induction apparatus

Technical field:

The utility model relates to vehicle testing technique, refers in particular to a kind of being used on the vehicle safety performance detection line entering the automobile position auto-induction apparatus that position that headlamp detects the automobile of station is detected automatically.

Background technology:

In order to guarantee the safety of automobile night running, require car headlamp to possess enough luminous intensities and direction of illumination accurately, GB7258-2004 " motor vehicle security of operation technical conditions " has made clear and definite regulation to this, various places vehicle safety performance measuring station also detects the essential items for inspection of this project as automobile annual examination check.

Usually adopt the full automatic car headlamp aligner that car headlamp is detected.This instrument moves on exclusive guideway, seeks tested headlamp automatically, detects the luminous intensity and the light shaft offset amount of tested headlamp automatically.The guide rail of this instrument is vertical with reference row fare on the detection line, so this reference row fare datum line of detecting of headlamp just.In order to guarantee the accuracy of headlamp aligner measurement result, require tested automobile when arriving headlamp and detect station, its working direction (axis direction of body of a motor car) should with the reference row fare (headlamp detection reference line) consistent (as shown in Figure 1) of detection line.Because tested automobile by range estimation manual operations control, therefore error occurs by the driver unavoidably, does not reach above-mentioned requirement, (as shown in Figure 2), thus cause generation additive error when car headlamp light shaft offset amount detected, influence traffic safety.

Utility model patent 2005-20033317.1 provides a kind of automobile corrector, adopt tourelle and pneumatic pusher structure on the forward and backward correcting platform, tested automobile is set right, the direction of the vehicle body axis of tested automobile is overlapped with the direction of driving datum line, thereby the headlamp that is not just being brought of having avoided stopping detect additive error.But this automobile corrector is bulky, and heaviness is installed difficulty, and cost is higher, and need apply side force to wheel, has limited its application.

On January 19th, 2005, disclosed utility model patent 03131928.9 provided a kind of ccd video camera that adopts above the automobile of having parked automobile to be taken pictures, its image is handled by computing machine, obtain the direction of body of a motor car axis and the deviation of reference row fare direction, thereby the method to the testing result of automatic tester for vehicle headlamp is revised has solved above problem to a certain extent.But this method fails to solve tested vehicle color when close with the ground color, how to extract the problem of vehicle body image.And the part automobile is because body distortion, makes direction and the automobile actual travel direction of axis of its vehicle body image have deviation, equally also can cause error to the testing result of automatic tester for vehicle headlamp.

The utility model content:

The purpose of this utility model is to overcome the deficiencies in the prior art, provide a kind of when on the vehicle safety performance detection line, car headlamp being detected, respond to tested automobile position automatically, calculate the automobile position auto-induction apparatus of tested vehicle traveling direction (vehicle body axis direction) and detection line reference row fare (headlamp detection reference line) deviation angle automatically.

For achieving the above object, the technical scheme that the utility model provides is: automobile position auto-induction apparatus, this device includes at least three automobile position inductors, the first automobile position inductor wherein, the second automobile position inductor, the 3rd automobile position inductor buries respectively and is placed on tested running car and enters on the road surface before the headlamp aligner station, the first automobile position inductor and the second automobile position inductor are perpendicular to a left side, right lateral car datum line is installed, both should equate to the distance of the guide rail of automatic tester for vehicle headlamp, the 3rd automobile position inductor is equipped with a plurality of automobile position sensing units in the place ahead of the first automobile position inductor or the second automobile position inductor or rear and install perpendicular to the arbitrary driving datum line in the left and right sides on each automobile position inductor.

Described automobile position sensing unit can be mechanical switch mode, reflective photoelectric switch mode, correlation optoelectronic switch mode magnetic induction switch mode, near in on-off mode, pressure transducer mode, photoelectric cell or photoresistance mode, the ultrasonic sensor mode any one.

In order to improve the accuracy of technique scheme measured automobiles position, can increase by a cover Laser emission receiving trap 17,18 on its first automobile position inductor 1 and the second automobile position inductor 2 respectively.

The utility model can be realized responding to automatically tested automobile position, calculate tested vehicle traveling direction (vehicle body axis direction) and detection line reference row fare (headlamp detection reference line) deviation angle automatically by technique scheme, thereby can detect data correction to headlamp, the error that detects data is reduced greatly.It is simple in structure, the shared volume of equipment is less, cost reduces greatly.

Description of drawings:

Fig. 1, Fig. 2 are the prior art structural representation;

Fig. 3 is the utility model structural representation;

Fig. 4 is for adopting the automobile position sensing unit structural representation of mechanical switch mode;

Fig. 5 is for adopting the automobile position sensing unit structural representation of reflective photoelectric switch mode;

Fig. 6 is for adopting the automobile position sensing unit structural representation of correlation optoelectronic switch mode;

Fig. 7 is for adopting the automobile position sensing unit structural representation of magnetic induction switch mode;

Fig. 8 is for adopting the automobile position sensing unit structural representation near on-off mode;

Fig. 9 is the automobile position sensing unit structural representation of adopts pressure sensor mode;

Figure 10 is for adopting the automobile position sensing unit structural representation of photoelectric cell or photoresistance mode;

Figure 11 is for adopting the automobile position sensing unit structural representation of ultrasonic sensor mode.

Embodiment:

See shown in the accompanying drawing 3, present embodiment is made up of three automobile position inductors, the first automobile position inductor 1 wherein, the second automobile position inductor 2, the 3rd automobile position inductor 3 buries respectively and is placed on tested running car and enters on the road surface before the headlamp aligner station, and the structure of three automobile position inductors all is the same.The first automobile position inductor 1 and the second automobile position inductor 2 are installed perpendicular to left and right driving datum line 14,15, both should equate to the distance of the guide rail 16 of automatic tester for vehicle headlamp, the 3rd automobile position inductor 3 is installed perpendicular to left lateral car datum line 14 in a distance, the place ahead of the first automobile position inductor 1, a plurality of automobile position sensing units 4 are installed on each automobile position inductor, the structure of each automobile position sensing unit all is identical, and it act as the position of detecting automotive wheel and triggers constantly.

The course of work of the present utility model is: when tested automobile keeps certain orientation to drive into headlamp detecting station with low speed (about 5km/h) on detection line, during front-wheel process automobile position inductor 3, start automobile position auto-induction apparatus and enter the surveying work state.Drive in the process of automobile position inductor at automobile back wheel, if the automobile working direction is toward left avertence, then off hind wheel 11 at first contacts certain the automobile position sensing unit 4 on the automobile position inductor 2, left rear wheel 12 touches certain the automobile position sensing unit 4 on the automobile position inductor 1 thereafter again, its mistiming is multiplied by automobile driving speed and just equals line segment A among Fig. 3, and the speed of automobile is tried to achieve by formula (1):

$V=\frac{L1}{T}$ Meter per second ... (1)

In the formula: V---car speed

Distance between L1---inductive vehicle device 1 and the inductive vehicle device 3

T---automobile left rear wheel 12 is through the time interval between automobile position inductor 1 and the automobile position inductor 3.

Line segment A is tried to achieve by formula (2):

A=Δ T * V rice ... (2)

In the formula: A---side-play amount

The time interval between △ T---automobile off hind wheel 11 contact automobile position inductors 2 and the automobile left rear wheel 12 contact automobile position inductors 1

V---car speed

In addition, after left rear wheel 12 and off hind wheel 11 were all pressed automobile position inductor 1 and automobile position inductor 2, according to the quantity and the position of the probe 5 of the automobile position sensing unit that is depressed on automobile position inductor 1 and 2, can obtain the wheelspan L of left rear wheel 12 and off hind wheel 11.Can try to achieve the angle α of tested automobile hind axle and driving datum line perpendicular line 10 by formula (3):

$\mathrm{\α}=\mathrm{arctg}\frac{A}{L}\·\·\·\·\·\·\left(3\right)$

According to automobile theory, the rear axle of automobile is vertical with the automobile working direction, and therefore the α that obtains in (3) formula is equal to the automobile working direction and the deviation angle of the datum line of driving a vehicle.In view of the above the measurement result of automatic tester for vehicle headlamp is revised, can be drawn the correct measurement result of car headlamp light shaft offset amount.

In addition, as shown in Figure 3,, can on automobile position inductor 1 and vehicle position sensor 2, install Laser emission receiving trap 17,18 more respectively additional, be used for the △ T of accurate measurement (2) formula in order to improve the accuracy of measured automobiles position.

Aforesaid process control and calculating just can be realized by general single-chip computer control system.

The automobile position sensing unit can be mechanical switch mode, reflective photoelectric switch mode, correlation optoelectronic switch mode magnetic induction switch mode, near in on-off mode, pressure transducer mode, photoelectric cell or the modes such as photoresistance mode, ultrasonic sensor mode any one.The specific constructive form of various switches is as follows:

Mechanical switch mode (seeing shown in Figure 4):

By position probe 5, spring 6, bearing 7, the mechanical contact-type switch constitutes, and is installed on the cover plate 9 of automobile position inductor.When the automobile process was pressed in probe 5, probe 5 moved down, and the contact mechanical switch makes the moving contact action of switch, output signal.

Reflective photoelectric switch mode (as shown in Figure 5):

The automobile position sensing unit is by position probe 5, spring 6, and bearing 7, reflective photoelectric switch constitutes, and is installed on the cover plate 9 of automobile position inductor.The Infrared that reflective switch sends projects on the probe 5.When automobile when being pressed in probe 5, probe 5 moves down, its distance with reflective photoelectric switch reduces, and the reflection of switch is increased, the receiving end of optoelectronic switch detects the variation of incident light, makes optoelectronic switch move output signal.

Correlation optoelectronic switch mode (as shown in Figure 6):

The automobile position sensing unit is by position probe 5, spring 6, and bearing 7, correlation optoelectronic switch 8 constitutes, and is installed on the cover plate 9 of automobile position inductor.Probe 5 blocks the Infrared transmitting terminal of correlation switch 8 under the normal condition.When the automobile process was pressed in probe 5, probe 5 moved down, and at this moment probe 5 can not block the Infrared transmitting terminal of correlation switch 8.The receiving end of optoelectronic switch detects infrared ray, makes the optoelectronic switch action, output signal.(probe 5 also can not block the Infrared transmitting terminal of correlation switch 8 under the normal condition, blocks the Infrared transmitting terminal of correlation switch when probe 5 moves down.Its principle is the same)

Magnetic induction switch mode (as shown in Figure 7):

The automobile position sensing unit is by position probe 5, spring 6, and bearing 7, magnetic induction switch 8 constitutes, and is installed on the cover plate 9 of automobile position inductor.When the automobile process was pressed in probe 5, probe 5 moved down, and the distance of magnet on the probe 5 and magnetic induction switch 8 reduces, and magnetic induction switch 8 detects the variation in magnetic field, makes switch motion, output signal.

Near on-off mode:

The automobile position sensing unit is by position probe 5, spring 6, and bearing 7, inductance approach switch 8 constitutes, and is installed on the cover plate 9 of automobile position inductor.When automobile when being pressed in probe 5, probe 5 moves down, probe 5 reduces with distance near switch, inductance approach switch 8 detects the variation in magnetic field, makes switch motion, output signal.

Pressure transducer mode (as shown in Figure 8):

The automobile position sensing unit is by position probe 5, spring 6, and bearing 7, pressure transducer 8 constitutes, and is installed on the cover plate 9 of automobile position inductor.When the automobile process was pressed in probe 5, probe 5 moved down, and drove descent of piston, and air pressure inside is changed, and pressure transducer 8 detects the variation of pressure, output signal.

Photoelectric cell or photoresistance mode (as shown in figure 10):

The automobile position sensing unit is by incidence window, and photoelectric cell or photoresistance 8 constitute.Be installed on the cover plate 9 of automobile position inductor.Block incident ray when the automobile process, photoelectric cell or photoresistance 8 detect the variation of light, output signal.

Ultrasonic sensor mode (as shown in figure 11):

The automobile position sensing unit is formed by going into ultrasonic sensor 8.Be installed on the cover plate 9 of automobile position inductor.When automobile produces reflection through out-of-date wheel to ultrasound wave.Ultrasonic sensor 8 detects the variation of ultrasonic reflections time, output signal.

Claims (3)

1, automobile position auto-induction apparatus, this device includes at least three automobile position inductors, it is characterized in that: the first automobile position inductor (1) wherein, the second automobile position inductor (2), the 3rd automobile position inductor (3) buries respectively and is placed on tested running car and enters on the road surface before the headlamp aligner station, the first automobile position inductor (1) and the second automobile position inductor (2) are perpendicular to a left side, right lateral car datum line (14,15) install, both should equate to the distance of the guide rail (16) of automatic tester for vehicle headlamp, the 3rd automobile position inductor (3) is in the place ahead of the first automobile position inductor (1) or the second automobile position inductor (2) or rear and perpendicular to the arbitrary driving datum line (14 in the left and right sides, 15) install, a plurality of automobile position sensing units (4) are installed on each automobile position inductor.

2, a kind of automobile position auto-induction apparatus according to claim 1 is characterized in that: the automobile position sensing unit (4) of installation can be mechanical switch mode, reflective photoelectric switch mode, correlation optoelectronic switch mode magnetic induction switch mode, near in on-off mode, pressure transducer mode, photoelectric cell or photoresistance mode, the ultrasonic sensor mode any one.

3, a kind of automobile position auto-induction apparatus according to claim 1 can increase a cover Laser emission receiving trap (17), (18) respectively on its first automobile position inductor (1) and the second automobile position inductor (2).

Images