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US3798644A
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Vector velocity system
Assignee: CONSTANT ARGEREY 1603 DANBURY DRIVE CLAREMONT CA 91711
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Filing: 1972-08-07
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Granted: 1974-03-19
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Expires: 1992-08-07
Abstract
Abstract Apparatus and method for measuring the angular velocity of an object in a single illumination utilizing a coherent system such as is utilized in a conventional doppler radar for radial velocity measurements. Apparatus and method for selecting specific frequency and bandwidth signals in the echo from the object illuminated by the coherent system, with the selected signal providing the data for subsequent computation to produce an output corresponding to the angular velocity of the object.
Inventors
- 👤 J Constant
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:20
CPC Classifications
G; G01; G01S; G01S13/00; G01S13/02; G01S13/50; G01S13/58; G01S13/589
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
179 words
In a coherent vector velocity system having a transmitter operating at wavelength lambda , a receiver and an antenna of beam width angle theta for illuminating an object, with the receiver output including the sum of steady in time and time varying frequency components produced by the echo from the illuminated object, the improvement for measuring the angular velocity of the object in a single illumination, including in combination: a data processor having first sorting means and second computation means, said first means including a plurality of selecting circuits connected in parallel, each of said circuits selecting from the input thereto, a signal of a specific center frequency fmn and a specific bandwidth Bmn, and providing an output signal identifying the circuit when an input signal is selected, said second means having the output signals of said selecting circuits as an input and including means for computing the angular velocity VA of the object illuminated for a specific selecting circuit output signal; and circuit means for connecting the receiver output as an input to each of said selecting circuits.
Claim 2
Dependent Claim
179 words
In a coherent vector velocity system having a transmitter operating at wavelength lambda , a receiver and an antenna of beam width angle theta for illuminating an object, with the receiver output including the sum of steady in time and time varying frequency components produced by the echo from the illuminated object, the improvement for measuring the angular velocity of the object in a single illumination, including in combination: a data processor having first sorting means and second computation means, said first means including a plurality of selecting circuits connected in parallel, each of said circuits selecting from the input thereto, a signal of a specific center frequency fmn and a specific bandwidth Bmn, and providing an output signal identifying the circuit when an input signal is selected, said second means having the output signals of said selecting circuits as an input and including means for computing the angular velocity VA of the object illuminated for a specific selecting circuit output signal; and circuit means for connecting the receiver output as an input to each of said selecting circuits.
Claim 3
Dependent Claim
25 words
A system as defined in claim 1 wherein said means for computing angular velocity includes means for calculating Bmn (2/ lambda )VA . theta .
Claim 4
Dependent Claim
26 words
A system as defined in claim 1 wherein said second means also includes means for computing the angle phi of the path of the object illuminated.
Claim 5
Dependent Claim
25 words
A system as defined in claim 3 wherein said means for computing path angle includes means for calculating tan phi mn fmn/Bmn . theta .
Claim 6
Dependent Claim
25 words
A system as defined in claim 4 wherein said means for computing angular velocity includes means for calculating Bmn (2/ lambda )VA . theta .
Claim 7
Dependent Claim
24 words
A system as defined in claim 1 wherein said second means also includes means for computing the radial velocity VR of the object illuminated.
Claim 8
Dependent Claim
22 words
A system as defined in claim 6 wherein said means for computing radial velocity includes means for calculating fmn (2/ lambda )VR.
Claim 9
Dependent Claim
24 words
A system as defined in claim 6 wherein said second means also includes means for computing the vector velocity V of the object illuminated.
Claim 10
Dependent Claim
28 words
A system as defined in claim 1 wherein said second means also includes means for computing the distance x between the object and the antenna line of sight.
Claim 11
Dependent Claim
47 words
A system as defined in claim 9 wherein said means for computing distance x includes means for calculating fmn'' 2/ lambda VA . x/R, where R is the distance between the object and the antenna, and fmn'' is the angle doppler frequency component of the receiver output.
Claim 12
Dependent Claim
13 words
A system as defined in claim 1 wherein said selecting circuits comprise correlators.
Claim 13
Dependent Claim
14 words
A system as defined in claim 1 wherein said selecting circuits comprise matched filters.
Claim 14
Dependent Claim
15 words
A system as defined in claim 1 wherein said selecting circuits comprise pulse compression filters.
Claim 15
Dependent Claim
15 words
A system as defined in claim 1 wherein said transmitter operates as a pulsed transmitter.
Claim 16
Dependent Claim
17 words
A system as defined in claim 1 wherein said transmitter operates as a continuous wave (CW) transmitter.
Claim 17
Independent Claim
118 words
A method of measuring the angular velocity VA of an object in a singLe illumination by a coherent vector velocity system having a transmitter operating at wavelength lambda , a receiver, and an antenna of beamwidth angle theta , including the steps of: illuminating the object and receiving an echo from the object as it moves along a path at angle phi and velocity V, with the receiver output including a time varying signal of frequency fmn and bandwidth Bmn produced by the echo from the illuminated object; generating a selection signal corresponding to the specific frequency and bandwidth in the receiver output; and calculating the angular velocity VA of the object for such specific frequency and bandwidth.
Claim 18
Independent Claim
118 words
A method of measuring the angular velocity VA of an object in a singLe illumination by a coherent vector velocity system having a transmitter operating at wavelength lambda , a receiver, and an antenna of beamwidth angle theta , including the steps of: illuminating the object and receiving an echo from the object as it moves along a path at angle phi and velocity V, with the receiver output including a time varying signal of frequency fmn and bandwidth Bmn produced by the echo from the illuminated object; generating a selection signal corresponding to the specific frequency and bandwidth in the receiver output; and calculating the angular velocity VA of the object for such specific frequency and bandwidth.
Claim 19
Dependent Claim
15 words
The method of claim 16 including performing the calculation Bmn (2/ lambda )VA. theta .
Claim 20
Dependent Claim
24 words
The method of claim 16 including the step of calculating the path angle phi of the object for such specific frequency and band width.
Claim 21
Dependent Claim
16 words
The method of claim 18 including performing the calculation tan phi mn fmn/Bmn . theta .
Claim 22
Dependent Claim
16 words
The method of claim 19 including performing the calculation Bmn (2/ lambda )VA . theta .
Claim 23
Dependent Claim
18 words
The method of claim 16 including the step of calculating the radial velocity VR of the object illuminated.
Claim 24
Dependent Claim
13 words
The method of claim 21 including performing the calculation fmn (2/ lambda )VR.
Claim 25
Dependent Claim
18 words
The method of claim 21 including the step of calculating the vector velocity V of the object illuminated.
Claim 26
Dependent Claim
22 words
The method of claim 16 including the step of calculating the distance x between the object and the antenna line of sight.
Claim 27
Dependent Claim
38 words
The method of claim 24 including performing the calculation fmn'' 2/ lambda VA . x/R, where R is the distance between the object and the antenna, and fmn'' is the angle doppler frequency component of the receiver output.
References Cited (Backward Citations)
US2617093A
Cited
US2848713A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-03-18 | 1977-09-17 | 1978-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-18 | 1981-09-17 | 1982-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-18 | 1985-09-17 | 1986-03-19 | $7700.00 | Window Closed / Lapsed |