IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0671853
(1996-06-28)
|
발명자
/ 주소 |
- Lemelson, Jerome H.
- Pedersen, Robert
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
337 인용 특허 :
37 |
초록
▼
A system and method assists the driver of a motor vehicle in preventing accidents or minimizing the effects of same. In one form, a television camera is mounted on a vehicle and scans the roadway ahead of the vehicle as the vehicle travels. Continuously generated video picture signals output by the
A system and method assists the driver of a motor vehicle in preventing accidents or minimizing the effects of same. In one form, a television camera is mounted on a vehicle and scans the roadway ahead of the vehicle as the vehicle travels. Continuously generated video picture signals output by the camera are electronically processed and analyzed by an image analyzing computer, which generates codes that serve to identify obstacles. A decision computer mounted in the controlled vehicle receives such code signals along with code signals generated by the speedometer or one or more sensors sensing steering mechanism operation and generates control signals. Such code signals may be displayed, and a synthetic speech or special sound generating and warning means used, to warn the driver of the vehicle of approaching and existing hazards. The system may also use the control signals, particularly through application of fuzzy logic, to control the operation of the brakes and steering mechanism of the vehicle to avoid or lessen the effects of a collision. In a particular form, the decision computer may select the evasive action taken from a number of choices, depending on whether and where the detection device senses other vehicles or obstacles.
대표청구항
▼
A system and method assists the driver of a motor vehicle in preventing accidents or minimizing the effects of same. In one form, a television camera is mounted on a vehicle and scans the roadway ahead of the vehicle as the vehicle travels. Continuously generated video picture signals output by the
A system and method assists the driver of a motor vehicle in preventing accidents or minimizing the effects of same. In one form, a television camera is mounted on a vehicle and scans the roadway ahead of the vehicle as the vehicle travels. Continuously generated video picture signals output by the camera are electronically processed and analyzed by an image analyzing computer, which generates codes that serve to identify obstacles. A decision computer mounted in the controlled vehicle receives such code signals along with code signals generated by the speedometer or one or more sensors sensing steering mechanism operation and generates control signals. Such code signals may be displayed, and a synthetic speech or special sound generating and warning means used, to warn the driver of the vehicle of approaching and existing hazards. The system may also use the control signals, particularly through application of fuzzy logic, to control the operation of the brakes and steering mechanism of the vehicle to avoid or lessen the effects of a collision. In a particular form, the decision computer may select the evasive action taken from a number of choices, depending on whether and where the detection device senses other vehicles or obstacles. system, allows the use of a variety of call information protocols between the PBX's and the system, and between the system and the voice mail system, and further allows a variety of integration schemes which provide enhanced functionality to the voice mail system. n portion of said slit plate, calculates the correcting value for correcting the rotation detecting signal generated from the specified position, and corrects the rotation detecting signal with the correcting value. 6. The X-ray CT apparatus according to claim 1, wherein said rotation detecting means includes: a target section to be detected, which is mounted to any one of said rotary section and said stationary section to impart a periodic change in the magnetic flux in the circumferential direction of a circle coaxial with said rotary section; and rotation detecting means mounted to the other of the rotary section and the stationary section for detecting the change in the magnetic flux that is generated in said target section in accordance with rotation of said rotary section to generate an electric signal conforming with said change in the magnetic flux. 7. The X-ray CT apparatus according to claim 6, wherein said target section is formed of a gear, and said rotation detecting means includes a magnetic flux generating means for generating a magnetic flux and a magneto-resistance element generating an electric signal showing a change in the resistance corresponding to the change in said magnetic flux receiving the function by the rotation of said gear. 8. The X-ray CT apparatus according to claim 7, wherein the tooth tip of said gear has a sharpened shape. 9. The X-ray CT apparatus according to claim 1, wherein said correcting means corrects the rotation detecting signal during rotation of said rotary section excluding the accelerating period and the decelerating period of the rotary section rotation. 10. An X-ray CT apparatus, comprising: a gantry including a substantially cylindrical rotary section and a stationary section rotatably holding the rotary section; rotation detecting means for detecting the rotation of the rotary section to generate a rotation detecting signal, said rotation detecting means including a target section to be detected, which is mounted to one of said rotary section and said stationary section to impart a periodic change in the magnetic flux in the rotating direction of the rotary section, and a rotation detecting sensor mounted to the other of the rotary section and the stationary section with a gap provided between said target section to detect the change in the magnetic flux generated in the target section in accordance with rotation of the rotary section and to generate a rotation detecting signal in accordance with detection of the change in the magnetic flux; a sensor for detecting a reference position of the rotary section to generate a reference position detecting signal; calculating means for calculating at least one of the rotating position and the rotating speed of the rotary section on the basis of said detection signal, said calculating means calculating the rotating position of the rotary section on the basis of the reference position signal generated from a position sensor and the rotating speed of the rotary section and also calculating a correction amount conforming with the position from said rotation detecting signal; and moving means for slightly moving said rotation detecting sensor relative to said target section in accordance with said correcting amount to maintain constant the gap between the target section and the rotation detecting sensor. 11. The X-ray CT apparatus according to claim 10, wherein a correcting value is calculated based on the detecting signal obtained from said rotation detecting signal by rotating said target section to allow said target section to make at least one complete rotation, and the moving amount of said rotation detecting sensor is calculated on the basis of said correcting value. 12. The X-ray CT apparatus according to claim 10, wherein said calculating means calculates the moving amount conforming with the accuracy of said electric signal that is fluctuated by the rotating speed of said rotary section. 13. The X-ray CT apparat us according to claim 11, wherein said calculating means sets the scanogram photographing mode and rotates said rotary section to allow said rotary section to make at least one complete rotation for the photographing in the scanogram photographing mode. 14. An X-ray CT apparatus, comprising: a gantry including a substantially cylindrical rotary section and a stationary section rotatably holding the rotary section; rotation detecting means for detecting the rotation of the rotary section to generate a rotation detecting signal, said rotation detecting means including a ring-like target section to be detected, which is mounted to any one of said rotary section and said stationary section and having a periodic slit pattern formed therein, and an optical sensor mounted to the other of said rotary section and said stationary section in a manner to face said target section to detect the light ray passing through the slit pattern of the target section in accordance with rotation of the rotary section and, thus, to generate a detection signal; correcting means for correcting the rotation detecting signal; and calculating means for calculating at least one of the rotating position and the rotating speed of the rotary section on the basis of a corrected detecting signal from said correcting means. 15. The X-ray CT apparatus according to claim 14, wherein said optical sensor is a transmission photo interrupter. 16. The X-ray CT apparatus according to claim 14, further comprising means for removing dust attached to said slit pattern. 17. The X-ray CT apparatus according to claim 14, wherein said gantry includes a magnet mounted to said rotary section and a winding mounted to said stationary section, and said rotation calculating means includes rotation driving means for supplying an electric current to said winding. 18. An X-ray CT apparatus comprising: a gantry including a substantially cylindrical rotary section and a stationary section rotatably holding the rotary section; detectable means, mounted on one of the rotary section and the stationary section, for applying a periodical change on a magnetic flux generated in a circumferential space which is coaxially defined around said rotary section; detecting means, mounted on the another of the rotary section and the stationary section, for detecting the change of the magnetic flux which is produced due to the rotation of the rotary section, to generate a rotation detecting signal; and calculating means for calculating at least one of the rotating position and the rotating speed of the rotary section on the basis of the detecting signal from said detecting means, wherein said detectable means includes a gear having tooth tips, and wherein said detecting means includes means for applying the magnetic flux in the circumferential space, and a magneto-resistance element for producing a change in the resistance corresponding to the change in said magnetic flux to generate an electric signal. 19. The X-ray CT apparatus according to claim 18, wherein the tooth tip of said gear has a sharpened shape. 20. An X-ray CT apparatus comprising: a gantry including a substantially cylindrical rotary section and a stationary section rotatably holding the rotary section; motor for directly driving the rotary section to rotate the rotary section; ring-shaped detectable section mounted on one of the rotary section and the stationary section and having a plurality of slits periodically arranged on said section; detecting means, mounted on the another of the rotary section and the stationary section, for detecting light rays passing through the slit to generate a rotation detecting signal; and means for generating an encoded signal based on the rotation detecting signal from said detecting means. METHOD OF MANUFACTURING AN OPTICAL DISK
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