Method for detecting the shape and/or dimensions of a wheel on vehicle repair workshop machines or the like
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
G01B-011/24
G01M-001/02
G01M-001/04
G01B-011/25
출원번호
US-0813374
(2011-08-01)
등록번호
US-9080860
(2015-07-14)
우선권정보
IT-MO2010A0222 (2010-07-30)
국제출원번호
PCT/IB2011/001770
(2011-08-01)
§371/§102 date
20130130
(20130130)
국제공개번호
WO2012/014062
(2012-02-02)
발명자
/ 주소
Montanari, Marco
Matteucci, Andrea
출원인 / 주소
SICAM S.R.L.
대리인 / 주소
Stein IP LLC
인용정보
피인용 횟수 :
0인용 특허 :
1
초록▼
A method for detecting the shape or dimensions of a wheel on vehicle repair workshop machines comprises the stages of: projection of a line of light onto the surface of a portion of a wheel (3) mounted rotating on a vehicle repair workshop machine; acquisition of at least a two-dimensional image of
A method for detecting the shape or dimensions of a wheel on vehicle repair workshop machines comprises the stages of: projection of a line of light onto the surface of a portion of a wheel (3) mounted rotating on a vehicle repair workshop machine; acquisition of at least a two-dimensional image of the projected line of light; processing the acquired image to determine the profile of the portion of the wheel; at least two stages of complete rotation of the wheel; and a distributed detection stage, wherein the projection stage and acquisition stage are performed in correspondence to first angular positions of the wheel during the first rotation stage, and in correspondence to second angular positions of the wheel during the second rotation stages, the first angular positions and the second angular positions being at least partially distinct the one from the other.
대표청구항▼
1. A method for detecting the shape or dimensions of a wheel on vehicle repair workshop machines, comprising the stages of: projecting a line of light onto the surface of at least a portion of a wheel mounted and rotating on a vehicle repair workshop machine, said line of light being generated by at
1. A method for detecting the shape or dimensions of a wheel on vehicle repair workshop machines, comprising the stages of: projecting a line of light onto the surface of at least a portion of a wheel mounted and rotating on a vehicle repair workshop machine, said line of light being generated by at least one light emitter;acquiring a two-dimensional image of said projected line of light, said acquisition stage being performed by at least one light sensor; andprocessing said acquired image to determine the profile of said portion of the wheel;said method including at least two stages of complete rotation of said wheel and a distributed detection stage, wherein said projection stage and acquisition stage are performed in correspondence to a group of first angular positions of said wheel during the first of said rotation stages, and in correspondence to a group of second angular positions of said wheel during the second of said rotation stages,wherein said group of first angular positions differs from said group of second angular positions inasmuch as at least one of said first angular positions is not present in said group of second angular positions or inasmuch as at least one of said second angular positions is not present in said group of first angular positions, andwherein said light sensor at every revolution of the wheel is not forced to detect images for each angular position of the wheel but only for a limited number of these positions, the acquisition in the other angular positions being done during the subsequent rotations. 2. The method according to claim 1, wherein said first angular positions and said second angular positions are all distinct the one from the other and pre-established. 3. The method according to claim 2, wherein said first angular positions and said second angular positions are pre-established according to the following indices: x=1, . . . , n/2, wherein x is a series of integer numbers;j=2x−1, wherein j is an odd number, andk=2x, wherein k is an even number,where n indicates the total number of the first and second angular positions. 4. The method according to claim 1, further comprising selecting said angular positions on a random basis. 5. The method according to claim 4, further comprising dividing said wheel into at least two sectors, and wherein said distributed detection stage continues until images have been acquired in each sector for a pre-established number of angular positions. 6. The method according to claim 1, further comprising processing the plurality of images acquired during said distributed detection stage to determine corresponding profiles of said portion of the wheel. 7. The method according to claim 6, further comprising storing said profiles and the corresponding angular positions of the wheel. 8. The method according to claim 6, further comprising calculating, starting with said determined profiles of the wheel, the characteristic dimensions of the wheel depending on the angular positions. 9. The method according to claim 6, further comprising calculating, starting with said determined profiles of the wheel, the position and diameter of the balancing planes of the wheel. 10. The method according to claim 9, further comprising selecting the balancing planes to be used among the calculated balancing planes. 11. The method according to claim 6, further comprising calculating, starting with said determined profiles of the wheel, the measurement of the eccentricity of the wheel. 12. The method according to claim 1, wherein said light emitter is composed of a laser device. 13. The method according to claim 1, wherein said projection stages comprise the generation of at least a blade of light, the lying plane of said generated blade of light being suitable for intercepting the profile of at least a portion of said wheel, so as to project said line of light onto the surface of said profile. 14. The method according to claim 1, wherein said projection stages comprise the generation of at least a straight light beam and the oscillation of said straight light beam between two extreme positions, so as to project said line of light onto the surface of said profile. 15. The method according to claim 1, wherein said light sensor comprises a camera with a matrix sensor. 16. The method according to claim 15, further comprising displaying said portion of the wheel by means of at least a display operatively associated with said light sensor. 17. The method according to claim 16, wherein said displaying stage comprises the graphic representation of the position for the application of at least a balancing weight to apply to the wheel. 18. The method according to claim 1, further comprising indicating, on the wheel, the position for the application of at least a balancing weight to apply by means of a straight light beam. 19. The method according to claim 1, wherein said processing stage comprises the determination of said profile starting from said acquired image and from the relative predefined position between said light emitter and said light sensor.
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이 특허에 인용된 특허 (1)
Downing Elizabeth A. (Sunnyvale CA) Rogers Steven W. (Conway AR) Titsworth Raymond (Conway AR) Christian Donald J. (Fremont CA) Baird Michael L. (Los Altos CA), Light scanning system for measurement of orientation and physical features of a workpiece.
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