Motion detector and analyzer
Abstract
Method and apparatus are provided for deriving positive and negative Doppler spectrum to enable analysis of objects in motion, and particularly, objects having rotary motion. First and second returned radar signals are mixed with internal signals to obtain an in-phase process signal and a quadrature process signal. A broad-band phase shifter shifts the quadrature signal through 90/degree/ relative to the in-phase signal over a predetermined frequency range. A pair of signals is output from the broad-band phase shifter which are then combined to provide a first side band signal which is functionally related to a negative Doppler shift spectrum. The distinct positive and negative Doppler spectra may then be analyzed for the motion characteristics of the object being examined.
- Inventors:
- Issue Date:
- Research Org.:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- OSTI Identifier:
- 7042189
- Patent Number(s):
- 6029033
- Assignee:
- TIC; EDB-88-179313
- Patent Classifications (CPCs):
-
G - PHYSICS G03 - PHOTOGRAPHY G03G - ELECTROGRAPHY
- DOE Contract Number:
- W-7405-ENG-36
- Resource Type:
- Patent
- Resource Relation:
- Other Information: Portions of this document are illegible in microfiche products
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 47 OTHER INSTRUMENTATION; 42 ENGINEERING; RADAR; DESIGN; DOPPLER EFFECT; ELECTRONIC CIRCUITS; FLOWSHEETS; INVENTIONS; NUMERICAL DATA; DATA; DIAGRAMS; INFORMATION; MEASURING INSTRUMENTS; RANGE FINDERS; 440300* - Miscellaneous Instruments- (-1989); 420800 - Engineering- Electronic Circuits & Devices- (-1989)
Citation Formats
Unruh, W P. Motion detector and analyzer. United States: N. p., 1987.
Web.
Unruh, W P. Motion detector and analyzer. United States.
Unruh, W P. Mon .
"Motion detector and analyzer". United States.
@article{osti_7042189,
title = {Motion detector and analyzer},
author = {Unruh, W P},
abstractNote = {Method and apparatus are provided for deriving positive and negative Doppler spectrum to enable analysis of objects in motion, and particularly, objects having rotary motion. First and second returned radar signals are mixed with internal signals to obtain an in-phase process signal and a quadrature process signal. A broad-band phase shifter shifts the quadrature signal through 90/degree/ relative to the in-phase signal over a predetermined frequency range. A pair of signals is output from the broad-band phase shifter which are then combined to provide a first side band signal which is functionally related to a negative Doppler shift spectrum. The distinct positive and negative Doppler spectra may then be analyzed for the motion characteristics of the object being examined.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Mon Mar 23 00:00:00 EST 1987},
month = {Mon Mar 23 00:00:00 EST 1987}
}