Title:
OPTICAL POSITION DETECTOR
Document Type and Number:
Japanese Patent JP3484499
Kind Code:
B2
Abstract:
PURPOSE: To remove the position detection error of a moving object caused by saturation of a receiving amplifier.
CONSTITUTION: Optical reflectors A1, A2, A3 arranged around a moving object are irradiated sequentially with light transmitted from an optical transmitter 3 at each measuring cycle. Reflected light is detected by a light receiver 4 and the output r1 therefrom is amplified by an amplifier 5. A position measuring unit 6 measures the distances up to respective reflectors A1, A2, A3 based on an output v1 from the amplifier and the position of the moving object on a horizontal plane is calculated at each measuring cycle. A variable transmittance filter 7 is disposed in front of the light receiver 4 and a controller 8 varies the transmittance of the filter 7 depending on the estimated distance up to the reflector A1, A2, A3 receiving the light.
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Inventors:
Nariyuki Ogata
Application Number:
JP9988294A
Publication Date:
January 06, 2004
Filing Date:
May 13, 1994
Export Citation:
Assignee:
Japan Aviation Electronics Industry Co., Ltd.
International Classes:
G01C15/00; G01S5/16; (IPC1-7): G01S5/16; G01C15/00
Domestic Patent References:
| JP666922A | ||||
| JP1287415A | ||||
| JP5967476A | ||||
| JP58122420A | ||||
| JP635532A | ||||
| JP354493A | ||||
| JP2161374A | ||||
| JP2161373A |
Attorney, Agent or Firm:
Kusano Taku (1 person outside)
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