Title:
【発明の名称】スター・スキャナ
Document Type and Number:
Japanese Patent JP2871117
Kind Code:
B2
Abstract:
PURPOSE:To dispense with the complex identification processing of the star detection signal in an attitude control system by preventing the output of the star detection pulse to the noise signal generated when radioactive particles are inputted to photo-detecting elements. CONSTITUTION:The light energy of a star S is collected by an optical lens 1, crosses detectors 2a, 2b in sequence in response to the spin of an artificial satellite, and star detection current signals S1, S3 are outputted. The signal S3 is inputted to a timing detecting circuit 6, and a star detection timing signal S4 is generated and inputted to an AND circuit 8. The signal S1 is inputted to a timing detecting/wave-form shaping delay circuit 7, it is wave-form-shaped to surround the signal S4 time-wise, and the signal S2 is outputted. The signal S2 and the signal S4 are inputted to the AND circuit 8, and the start detection pulse is outputted. Even when radioactive particles are inputted to the detector 2b and electric charges are generated and outputted from the circuit 6, no signal by the radioactive particles is outputted from the detector 2a.
Inventors:
HAMADA AKIHIKO
Application Number:
JP629691A
Publication Date:
March 17, 1999
Filing Date:
January 23, 1991
Export Citation:
Assignee:
NIPPON DENKI KK
International Classes:
B64G1/36; G01C1/00; G01C17/34; G01C21/24; (IPC1-7): G01C17/34; B64G1/36; G01C1/00; G01C21/24
Domestic Patent References:
| JP3267714A | ||||
| JP3226624A | ||||
| JP2141614A | ||||
| JP2126113A | ||||
| JP62220807A |
Attorney, Agent or Firm:
Naoki Kyomoto (2 outside)