Optics: measuring and testing – Velocity or velocity/height measuring – With light detector
Patent
1993-05-13
1997-12-09
Buczinski, Stephen C.
Optics: measuring and testing
Velocity or velocity/height measuring
With light detector
327557, G01P 336, H03B 100
Patent
active
056965788
ABSTRACT:
This invention has as its object to provide a frequency tracking method, a frequency control apparatus (tracking apparatus) using this method, and a Doppler velocity meter using the same, which easily and quickly allow the center frequency of a band pass filter to coincide with the frequency of an input signal even when an input signal suffers from a large level drift. A tracking method for a center frequency of a band-pass filter relates to a method including the deviation information detection step of detecting deviation information of the frequency of a signal to be input to the band-pass filter or a signal output from the band-pass filter with respect to the center frequency of the band-pass filter, the deviation information detection step including at least the step of detecting the deviation direction, and the changing step of changing the center frequency of the band-pass filter on the basis of a detection result in the detection step of detecting the deviation information including the deviation direction, thereby adjusting the center frequency of the band-pass filter to coincide with the frequency of a signal to be filtered through the band-pass filter.
REFERENCES:
patent: 3714588 (1973-01-01), Deboo et al.
patent: 4101837 (1978-07-01), Clayton et al.
patent: 4154669 (1979-05-01), Goetz
patent: 4307398 (1981-12-01), Ward
patent: 4610540 (1986-09-01), Mossey
patent: 5300838 (1994-04-01), Elizondo
Ashiwa Jun
Ishida Yasuhiko
Kadowaki Hidejiro
Kato Shigeki
Takamiya Makoto
Buczinski Stephen C.
Canon Kabushiki Kaisha
LandOfFree
Frequency tracking method and apparatus, and Doppler velocity me does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Frequency tracking method and apparatus, and Doppler velocity me, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Frequency tracking method and apparatus, and Doppler velocity me will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1611615