CN201096626Y - Computer controlled CCD fourth wheel orientator - Google Patents

Computer controlled CCD fourth wheel orientator Download PDF

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Publication number
CN201096626Y
CN201096626Y CNU2007201222669U CN200720122266U CN201096626Y CN 201096626 Y CN201096626 Y CN 201096626Y CN U2007201222669 U CNU2007201222669 U CN U2007201222669U CN 200720122266 U CN200720122266 U CN 200720122266U CN 201096626 Y CN201096626 Y CN 201096626Y
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ccd
sensor
control circuit
imaging system
head
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Expired - Lifetime
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CNU2007201222669U
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Chinese (zh)
Inventor
温树斌
姜学武
夏朝辉
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Bosch Automotive Service Solution Suzhou Co Ltd
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Autoboss Tech Inc
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Abstract

The utility model proposes a CCD four-wheel alignment instrument controlled by a computer, comprising a data acquisition device and a data processing device; the data acquisition device comprises four sensor handpieces; the sensor handpiece comprises an optical imaging system with two linear array CCD sensors, a CCD drive control circuit, a double-shaft inclination angle sensor and a handpice main board control circuit with a RF transmitting/receiving module; the information collected by the CCD chip is processed by the CCD drive control circuit together with the double-shaft inclination angle sensor; the collected information is transmitted to the handpice main board control circuit for the former treatment, and then is transmitted to the computer by the RF transmitting/receiving module on the handpiece main board through the wireless mode. The CCD four-wheel alignment instrument adopts the CCD element which has good imaging technique in the optics field and the optical imaging system which can resist the environmental light interference, and has the advantages of accurate positioning, high accuracy and high efficiency.

Description

The CCD four-wheel position finder of computer control
Technical field
The utility model relates to a kind of four-wheel position finder that is used for Automobile Detection, auto repair, particularly a kind of CCD four-wheel position finder of computer control.
Background technology
Four-wheel position finder develops into the computermatic four-wheel position finder of today by early stage simple prenex chi, optics level orientator, backguy orientator.Computermatic four-wheel position finder adopts the sensor difference by it, mainly is divided into laser four-wheel position finder, PSD four-wheel position finder, CCD four-wheel position finder and three-dimensional camera shooting 3D four-wheel position finder again.
The laser measurement mode is a kind of older technology, is actually to change into photovalve and measure signal reading the chi mode, shows with computing machine.The measuring process of this measuring system is as follows:
1, reads total toe-in value;
2, adjust front-wheel to the total toe-in value of regulation that dispatches from the factory by factory data;
3, see on the trailing wheel scale, the vertical laser rays reading of left and right sides front-wheel, addition is divided by 2;
4, with about the prenex numerical value that calculates of adjusting to.
From top set-up procedure as can be seen, this measuring system is utilized the scale laser system, prenex benchmark adjustment according to thrust line, but owing to adopt range estimation to read the chi mode, precision is relatively poor, estimates about 0.2 degree.
This mode laser measurement narrow range, the artificial thrust line that calculates of uncompensated and needs, its measuring accuracy is lower, and detection speed is also slower.Because laser product has some infringements to human eyesight, thus safety certifications such as UL, CE be difficult to pass through, in the North America, Europe, Japanese market is difficult to see.At present, just on markets such as China and Southeast Asia, some application are arranged still.
PSD is a kind of photoelectric device, and it is a kind of non-Splittable device, can convert the light spot position on the photosurface to electric signal.When a branch of light is mapped on the photosurface of PSD, will have electric current between with the different electrodes on the one side and pass through, this voltage or electric current change along with light spot position and the phenomenon that changes is exactly semi-conductive lateral light electrical effect.
PSD metering system measurement range is relatively narrow, and is subjected to surround lighting and Temperature Influence bigger, if having other background light or light reflection, refraction to inject PSD, will export incorrect data so; The faint variation of environment temperature also can cause the variation of PSD output current, thereby influences the precision of systematic survey, and therefore, the precision of PSD product and less stable need often equipment to be proofreaied and correct.But because its technical requirement is not high, structure is simple relatively, and is with low cost, and at present, movement still adopts the PSD sensor in a large amount of Korea S of China.This is to cause the measurement of some orientator inaccurate, the main cause of poor repeatability.
The fundamental measurement principle of 3D metering system is to adopt image recognition technology, be contained in image information on the wheel reflector with the collection of CCD digital camera, to measure the relative accuracy of wheel, its crucial patent is to be placed on the lifting machine when vehicle, the artificial wheel that promotes moves forward and backward, this moment, the wheel rotation reached about half-turn, and the luminous point on the reflector marks a camber line in the space.The CCD camera captures the each point position, space in this camber line.Calculate the normal of space camber line, obtain its coordinate and angle.The advantage of 3D is to have replaced traditional sensor that the high-precision optical electronic installation is housed, and only makees target with a reflector.But loaded down with trivial details demarcation mode, very not fast measuring speed make the client be difficult to accept.There is the requirement of strict mechanical precision to cause its expensive price to lifting machine, rotation angle disk etc. simultaneously.
The utility model content
Technical problem to be solved in the utility model is: provide the CCD four-wheel position finder of a kind of computer control,, poor repeatability inaccurate with the measurement that solves existing four-wheel detent mechanism and mode, the problem that efficiency of measurement is low.
For this reason, the utility model proposes a kind of CCD four-wheel position finder of computer control, comprise data collector and data processing equipment; Described data collector comprises four sensor heads, comprises two head mainboard control circuits that have optical imaging system and CCD Drive and Control Circuit, a double-shaft tilt angle sensor of line array CCD sensor and have the RF transmit/receive module on the described sensor head;
Described optical imaging system comprises optical filter, convex mirror and line array CCD chip, and described ccd sensor is the Charge Coupled Device (CCD) CCD image sensor chip of linear array structure; Described convex mirror is located at the daylighting front end of CCD chip, and described optical filter is located at the front end of convex mirror again;
An optical imaging system that has the line array CCD sensor is respectively established at the end of described sensor head and middle part, at the middle part of sensor head a described double-shaft tilt angle sensor is installed also;
The information that the CCD chip collects is handled via the CCD Drive and Control Circuit, and be sent to described head mainboard control circuit together in conjunction with the information that double-shaft tilt angle sensor collects, carry out early stage and handle, again by the RF transmit/receive module on the head mainboard to the wireless transmission of host computer.
Preferably: described data processing equipment comprises host computer and radio frequency reception/emitter, and wherein radio frequency reception/emitter is that a radio frequency master launches receiving box.
The beneficial effects of the utility model: compared to existing technology, the utility model patent has adopted the good line array CCD element of optical field imaging technique and can resist the optical imaging system of ambient light interference, has accurate positioning, precision height, characteristics that efficient is high.
Description of drawings
Fig. 1 is the infrared C CD system instrumentation plan that relates to of the present utility model.
Fig. 2 is a signal transmission synoptic diagram.
Fig. 3 is the circuit diagram of CCD chip drives control circuit.
Fig. 4 is the circuit diagram of head mainboard control circuit.
Fig. 5 is an electrical installation schematic diagram of the present utility model.
Fig. 6 is the software function structured flowchart.
Embodiment
The utility model provides a kind of CCD four-wheel position finder of computer control, and this orientator mainly is made of data collector and data processing equipment.
Data collector is mainly four sensor heads.Comprise two head mainboard control circuits that have optical imaging system and CCD Drive and Control Circuit, a double-shaft tilt angle sensor of line array CCD sensor and have the RF transmit/receive module on the sensor head.
Referring to Fig. 1, there are bandpass filter 2, plano-convex cylindrical mirror 3, line array CCD chip 4 to form optical imaging system on the sensor head, and drive and control by IC circuit modules such as PIC.Wherein ccd sensor is the Charge Coupled Device (CCD) CCD image sensor chip of linear array structure.Plano-convex cylindrical mirror 3 is located at the daylighting front end of line array CCD chip 4, and bandpass filter 2 is located at the front end of plano-convex cylindrical mirror 3 again.
An optical imaging system that has the line array CCD sensor is respectively established at the end of sensor head and middle part, at the middle part of sensor head a double-shaft tilt angle sensor is installed also.The information that the CCD chip collects is handled the back via PIC and is transmitted to main frame by head mainboard RF transmit/receive module.
The information that the CCD chip collects is handled via the CCD Drive and Control Circuit, and be sent to head mainboard control circuit together in conjunction with the information that double-shaft tilt angle sensor collects, carry out early stage and handle, again by the RF transmit/receive module on the head mainboard to the wireless transmission of host computer.
Data processing equipment comprises host computer and radio frequency reception/emitter, and wherein radio frequency reception/emitter is that a radio frequency master launches receiving box.
The CCD element is in principle explanation of the present utility model.Charge Coupled Device (CCD) CCD image sensor (Charge Coupled Device) element is a digital element, and the CCD that is applied on the four-wheel position finder is a linear array structure.Several thousand quick unit of relatively independent picture distribute point-blank with 14 microns neighbor distance.Irradiate light produces signal charge to the quick unit of picture, signal charge externally under the effect of pulse the micro processor of direct input pickup handle, thereby calculate the angle and the prenex angle of incident light accurately.From left to right the long distance of 40mm is last for the CCD element, is arranging more than 2,000 pixel.With reference to figure 1, this figure is an infrared C CD system survey sheet, and it is the closed-loop system that eight emissions eight receive, and shows wheel data in real time, thus the high precision that measuring process is measured by the Computer Processing assurance, and its measuring accuracy can be in 0.02 degree.The quick cell distribution of picture is even because CCD goes up, and its linearity is good, and therefore, the measuring accuracy of this metering system is higher.Because the influence that CCD digital technology element is not changed by voltage, temperature etc., it is stable to make it have measuring accuracy, after software improves, can not be subjected to series of advantages such as interference, the cost of external light be relatively low.
The utility model utilizes line array CCD chip and Drive and Control Circuit, plano-convex cylindrical mirror, bandpass filter, CCD box etc. to be designed to the optical imaging system of infrared light spot, the data that this optical imaging system and obliquity sensor are collected, be wirelessly transmitted in the host computer with the RF transmitter module after the PIC single-chip microcomputer simple process on head mainboard control circuit, utilize self-built mathematical model to calculate, draw correct automotive wheel locator data, the principle of optical imaging system is referring to Fig. 1.Infrared emission tube 1 is by bandpass filter 2, and by bandpass filter 2 filtering environmental light, infrared ray impinges upon on the line array CCD chip 4 after the adjustment direction via 3 refractions of plano-convex cylindrical mirror.
Fig. 2 is a signal transmission synoptic diagram.The infrared ray light of optical imaging system after with filtration treatment is transported to line array CCD, and line array CCD converts light signal to digital signal and transfers to the line array CCD Drive and Control Circuit and handle.Via the BF transmit/receive module on the sensor head mainboard, the RF master who is wirelessly transmitted to host computer launches receiving box with the ccd signal that obtains for line array CCD chip drives and control circuit, flows to host computer by it and handles.
Line array CCD chip drives and control circuit schematic diagram are referring to Fig. 3.Among the figure, the high precision TCD1208 that line array CCD adopts Toshiba Corp to produce, pixel number 2160, pixel dimension 14um; The line array CCD chip is directly driven and control by PIC16F627A, has greatly simplified circuit, strengthens its job stability.Line array CCD chip drives and control circuit are wirelessly transmitted to the RF transmitting and receiving module of ccd signal on mainboard that obtains in the host computer.
Experimental test data and result in the utility model optical imaging system are as follows.Bandpass filter is 940 ± 40nm (centre wavelength 940nm) for the logical scope of band, 300-930nm wavelength light transmissivity≤0.5%; 950-1100nm wavelength light transmissivity≤0.5%, the logical wavelength light transmissivity of band: 13 ± 3%; The plano-convex cylindrical mirror is design wavelength: 940nm, focal length: 30mm ± 0.5%, and centre deviation: 1 minute, smooth finish: III.
Fig. 4 is the circuit diagram of head mainboard control circuit.CON5 is the obliquity sensor interface among the figure, and CON7 is that the interface CON9 of CCD module is the RF module interface.The control chip of motherboard circuit adopts PIC16F876A model single-chip microcomputer.This figure bottom is divided into power circuit, is used for converting 9V lithium piezoelectric voltage to the 5V operating voltage.
Fig. 5 is an electrical installation schematic diagram of the present utility model.
Part of data acquisition is four sensor heads.An optical imaging system that has the line array CCD sensor is respectively adorned at the end of each sensor head and middle part, and sensor head middle part is equipped with a double-shaft tilt angle sensor (the survey sensor head is at direction angle of inclination, all around).The line array CCD sensor is handled image that obtains and double-shaft tilt angle sensor measurement data through single-chip microcomputer, radio to computer system by radiofrequency launcher, is handled by computer system.Because line array CCD sensor and double-shaft tilt angle sensor measurement data have reflected the mutual relationship of the infrared transmitting tube on himself and the corresponding sensor head, and the sensor head links to each other with automobile rim by four anchor clamps, so can calculate the mutual relationship of four wheel rims by eight line array CCD sensors and double-shaft tilt angle sensor measurement data, thereby determine the positional parameter of wheel; Eight line array CCD sensors form the right angle quadrilateral of a sealing, can realize the full four-wheel positioning measurement of vehicle.In actual applications, eight line array CCD sensors on four sensor heads, the optical filter that its camera lens is adorned previously is in order to eliminate the interference of visible light to the infrared-emitting diode bright spot.
Data processing division is divided into the four-wheel position finder main frame, mainly comprises computer control system, power-supply system and an interface system.Its effect is to realize the instruction manipulation of user to four-wheel position finder, the data of sensor is gathered, is handled, and show with former factory design parameter, and guides user is adjusted automobile simultaneously, prints corresponding form at last.
Part of data acquisition and data processing section carry out wireless transmission by radio-frequency transmissions/receiver.
Because four-wheel position finder need compare testing result and the accurate data of former emblem mark, and regulates according to the comparing result guides user.So the complete of location database is a key factor of decision four-wheel position finder practicality.So the utility model four-wheel position finder contains the four-wheel locator data of multiple vehicle, the utility model orientator of testing contains the four-wheel locator data of more than 20,000 kind of vehicle.The user also can oneself import the four-wheel locator data of new model simultaneously, and the standard setting database is expanded.
Fig. 6 is the software function structured flowchart, and is as follows for each software module specification among the figure.
System management: comprise functions such as managing user information, data edition inquiry, transducer calibration.
Quick detection and localization: realize quick detection and localization operation.
Standard setting detects: realizing the detection and localization operation of standard, is the major part of this software.
Subscriber data: the essential information data that is used for preserving, revising the user.
Client's data: be used for checking vehicle data and data with prelocalization.
Transducer calibration: be used for sensor is demarcated.
Model data: the standard setting data that are used for inquiring about, safeguarding automobile.
System is provided with: be used for selecting measurement pattern, background music and voice are set.
Select vehicle: standard setting data and the data of determining to want positioned vehicle.
The parameter adjustment of forward and backward axle is measured: dynamically show forward and backward axle positional parameter.
Step is provided with: the operation steps when selecting the four-wheel assignment test.
Prepare before measuring: need the preliminary work of carrying out before telling the user to measure.
Eccentricity compensation: reduce because steel ring, the distortion of tire and the error that clamping causes.
Stub is measured before adjusting: carry out the measurement of reverse caster and Kingpin inclination.
Measure before adjusting: mainly measure toe-in, flare and the axle thrust angle, back of front and back wheel, and show together.
Form before adjusting: measure and the stub measuring process through before adjusting, test result all shows in an interface, for checking and printing.
Front-wheel is adjusted: dynamically show the front axle positional parameter.
Trailing wheel is adjusted: dynamically show the rear axle positional parameter.
Adjusting the back stub measures: through adjusting the back test, the result all shows in an interface.
Printing reports: the form of automobile correlation parameter before and after printing/preservation four-wheel location is adjusted.
The software function system also uses following functional module except module listed above, these modules can incorporate the function that realizes in the system separately flexibly.
Vehicle inquiry: check, select production firm and vehicle.
Vehicle normal data: the standard setting data that show selected vehicle.
From adding, revising vehicle: allow user oneself add, revise the standard setting parameter of vehicle.
Counterweight information: BMW etc. is required the vehicle of counterweight, show the requirement of counterweight and fuel tank fuel quantity.
Vehicle body horizontal adjustment information: benz is waited the vehicle that has the vehicle body level to require, obtain the corresponding standard locator data according to levelness.
Adjustment information: the adjustment animation that concrete vehicle is provided.
Lifting is adjusted: wheel is adjusted after unsettled.
Prenex steady state value is measured: have the car of requirement to measure AUDI A6 etc. to prenex change curve.
Failure message: show failure messages such as communication abnormality, light be unusual in real time.
Adjust sensor head level: show the horizontal situation of sensor head in real time.
The sensor accuracy misalignment: whether the real-time judge sensor needs is demarcated again.

Claims (2)

1, a kind of CCD four-wheel position finder of computer control comprises data collector and data processing equipment; Described data collector comprises four sensor heads, it is characterized in that:
Comprise two head mainboard control circuits that have optical imaging system and CCD Drive and Control Circuit, a double-shaft tilt angle sensor of line array CCD sensor and have the RF transmit/receive module on the described sensor head;
Described optical imaging system comprises optical filter, convex mirror and line array CCD chip, and described ccd sensor is the Charge Coupled Device (CCD) CCD image sensor chip of linear array structure; Described convex mirror is located at the daylighting front end of CCD chip, and described optical filter is located at the front end of convex mirror again;
An optical imaging system that has the line array CCD sensor is respectively established at the end of described sensor head and middle part, at the middle part of sensor head a described double-shaft tilt angle sensor is installed also;
The information that the CCD chip collects is handled via the CCD Drive and Control Circuit, and be sent to described head mainboard control circuit together in conjunction with the information that double-shaft tilt angle sensor collects, carry out early stage and handle, again by the RF transmit/receive module on the head mainboard to the wireless transmission of host computer.
2, the CCD four-wheel position finder of computer control according to claim 1, it is characterized in that: described data processing equipment comprises host computer and radio frequency reception/emitter, wherein radio frequency reception/emitter is that a radio frequency master launches receiving box.
CNU2007201222669U 2007-08-14 2007-08-14 Computer controlled CCD fourth wheel orientator Expired - Lifetime CN201096626Y (en)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101382471B (en) * 2008-10-16 2010-11-17 深圳市元征科技股份有限公司 Method and system for detecting four-wheel positioning for automobile
CN101893425A (en) * 2010-07-09 2010-11-24 清华大学 Visual full-parameter wheel alignment detection system and method based on linear array images
CN102257354A (en) * 2008-12-19 2011-11-23 罗伯特·博世有限公司 Method for chassis measurement and a device for measuring the chassis geometry of a vehicle
CN104316334A (en) * 2014-09-16 2015-01-28 深圳市元征软件开发有限公司 Method for detecting lifting of four-wheel position finder
CN105091794A (en) * 2015-08-19 2015-11-25 深圳科澳汽车科技有限公司 Device and method for detecting vehicle tyre camber angle and toe-in angle
CN108204787A (en) * 2016-12-19 2018-06-26 弗兰克公司 The sensing of the position based on optical sensor of radio frequency imaging device
CN109489994A (en) * 2018-12-27 2019-03-19 吉林大学 Bicyclic dynamic analog stub monomer calibrating apparatus for four-wheel positioning instrument

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101382471B (en) * 2008-10-16 2010-11-17 深圳市元征科技股份有限公司 Method and system for detecting four-wheel positioning for automobile
CN102257354A (en) * 2008-12-19 2011-11-23 罗伯特·博世有限公司 Method for chassis measurement and a device for measuring the chassis geometry of a vehicle
US8578765B2 (en) 2008-12-19 2013-11-12 Robert Bosch Gmbh Method for wheel suspension measurement and a device for measuring the wheel suspension geometry of a vehicle
CN102257354B (en) * 2008-12-19 2014-08-13 罗伯特·博世有限公司 Method for chassis measurement and a device for measuring the chassis geometry of a vehicle
CN101893425A (en) * 2010-07-09 2010-11-24 清华大学 Visual full-parameter wheel alignment detection system and method based on linear array images
CN101893425B (en) * 2010-07-09 2012-06-27 清华大学 Visual full-parameter wheel alignment detection system and method based on linear array images
CN104316334A (en) * 2014-09-16 2015-01-28 深圳市元征软件开发有限公司 Method for detecting lifting of four-wheel position finder
CN104316334B (en) * 2014-09-16 2017-02-01 深圳市元征软件开发有限公司 Method for detecting lifting of four-wheel position finder
CN105091794A (en) * 2015-08-19 2015-11-25 深圳科澳汽车科技有限公司 Device and method for detecting vehicle tyre camber angle and toe-in angle
CN108204787A (en) * 2016-12-19 2018-06-26 弗兰克公司 The sensing of the position based on optical sensor of radio frequency imaging device
CN109489994A (en) * 2018-12-27 2019-03-19 吉林大学 Bicyclic dynamic analog stub monomer calibrating apparatus for four-wheel positioning instrument
CN109489994B (en) * 2018-12-27 2024-02-13 吉林大学 Double-ring dynamic simulation master pin single four-wheel aligner calibrating device

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ASS Succession or assignment of patent right

Owner name: BOSCH AUTOMOTIVE SERVICE TECHNOLOGY (SUZHOU) CO.,

Free format text: FORMER OWNER: SHENZHEN AUTOBOSS TECH. INC.

Effective date: 20150119

C41 Transfer of patent application or patent right or utility model
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Free format text: CORRECT: ADDRESS; FROM: 518000 SHENZHEN, GUANGDONG PROVINCE TO: 215129 SUZHOU, JIANGSU PROVINCE

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Effective date of registration: 20150119

Address after: Huashan Suzhou high tech Zone Fengqiao Town Road Suzhou City, Jiangsu province 215129 No. 158

Patentee after: Bosch Automotive Service Technology (Suzhou) Co., Ltd.

Address before: Shenzhen Futian District City, Guangdong province 518000 Xing Lu Industrial Zone step 304 on the 5 floor

Patentee before: AUTOBOSS TECH. INC.

CX01 Expiry of patent term

Granted publication date: 20080806

CX01 Expiry of patent term