US4280355A
Expired / Lapsed
US
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Fuze data quantizing system
Assignee: United States Department of the Army
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Filing: 1980-02-19
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Granted: 1981-07-28
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Expires: 2000-02-19
Abstract
Abstract The present invention discloses an in-flight testing of projectile and mor fuzes. A microminiature electronic circuitry in a cartridge form is designed to attach to any of the large caliber shell or mortar fuzes. The test-cartridge is a recoverable, reusable, high-g hardened device. The system for sampling and recording projectile fuzes during a period of target impact comprises: a power supply; a timing and control logic unit; an accelerometer; an amplitude encoder; a shift register; and an interface connector to transform stored information of the fuze functioning characteristics to a ground station readout unit.
Inventors
- 👤 William Donnally
- 👤 Chester L. Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 05:54
CPC Classifications
G; G01; G01P; G01P15/00; G01P15/02; G01P15/08; G01L; G01L5/00; G01L5/14
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
86 words
A fuze data quantizing system for sampling and recording projectile fuze data during a period of target impact and penetration, comprising: (a) a first channel for detecting and measuring a functional interval of said fuze during the impact; and (b) a second channel detecting and recording g-forces versus time; (c) shift register storage means for serially digitally storing information detected by said first and second channels; and (d) time interval counter means for timing the sampling and quantizing data processed by said first and second channels.
Claim 2
Dependent Claim
86 words
A fuze data quantizing system for sampling and recording projectile fuze data during a period of target impact and penetration, comprising: (a) a first channel for detecting and measuring a functional interval of said fuze during the impact; and (b) a second channel detecting and recording g-forces versus time; (c) shift register storage means for serially digitally storing information detected by said first and second channels; and (d) time interval counter means for timing the sampling and quantizing data processed by said first and second channels.
Claim 3
Dependent Claim
212 words
A fuze impact data-encoding system for sampling and recording a deceleration profile of a projectile at a plurality of discrete time intervals and for measuring and recording a time difference between initial impact time t 0 and a fuze detonation time t 1 of a fuze of said projectile, comprising: (a) a power source to energize said system; (b) a g-switch electrically coupled to power source, said switch being momentarily closed to initiate an operating sequence during first motion of said projectile's fuze time t 0 ; (c) a timing and control logic unit connected in combination with a time interval counter which is coupled in series with said g-switch to indicate a time difference t 1 -t 0 ; (d) accelerometer means for providing a voltage output proportional to a deceleration magnitude experienced in a fuze of said projectile; (e) an amplitude encoder electrically connected to the output of said accelerometer, said amplitude encoder generating a binary number representing the highest threshold exceeded during a particular sample time; (f) a shift-register electrically coupled to an output of said amplitude encoder, said shift register storing information in serially form; and (g) interface connector coupled to said shift-register to transform a stored information in said shift register to a ground station read-out unit.
Claim 4
Dependent Claim
212 words
A fuze impact data-encoding system for sampling and recording a deceleration profile of a projectile at a plurality of discrete time intervals and for measuring and recording a time difference between initial impact time t 0 and a fuze detonation time t 1 of a fuze of said projectile, comprising: (a) a power source to energize said system; (b) a g-switch electrically coupled to power source, said switch being momentarily closed to initiate an operating sequence during first motion of said projectile's fuze time t 0 ; (c) a timing and control logic unit connected in combination with a time interval counter which is coupled in series with said g-switch to indicate a time difference t 1 -t 0 ; (d) accelerometer means for providing a voltage output proportional to a deceleration magnitude experienced in a fuze of said projectile; (e) an amplitude encoder electrically connected to the output of said accelerometer, said amplitude encoder generating a binary number representing the highest threshold exceeded during a particular sample time; (f) a shift-register electrically coupled to an output of said amplitude encoder, said shift register storing information in serially form; and (g) interface connector coupled to said shift-register to transform a stored information in said shift register to a ground station read-out unit.
Claim 5
Dependent Claim
57 words
A fuze impact data-encoding system as recited in claim 2 including a time interval counter having an input electrically connected to said timing and control logic unit and an output electrically coupled to said shift register, said time interval counter transferring a binary signal in serial digital form representing said time interval t 1 -t 0 .
Claim 6
Dependent Claim
42 words
A fuze impact data-encoding system as recited in claim 3 further including an ionization switch operatively disposed in alignment with a fuze detonator assembly for detecting ionized gases generated when said detonator is fired at said fuze detonation time t 1 .
Claim 7
Independent Claim
211 words
A method for sampling projectile fuze data generated by a fuze of a projectile during a period of target impact and penetration, and recording a time difference between initial impact time t 0 and a fuze detonation time t 1 , comprising: (a) selectively energizing logic circuits and a transducer required to operate during sampling, processing and storage of data during a period of target impact and penetration; (b) resetting a timing and control logic unit, a time interval counter and a shift register to an initial state after said projectile is fired but prior to target impact; (c) initiating said time interval counter and an amplitude encoder at a time t 0 when the fuze first strikes a target, by a momentary closure of a g-switch; (d) providing timing and control for transfer of binary information in a logical format and in an ordered sequence; (e) deriving a logic pulse corresponding to the time of impact t 0 ; (f) deriving a logic indication at the time of fuze detonation t 1 by conduction of an ionization switch, and obtaining a binary count corresponding to a time interval t 1 -t 0 ; and (g) providing a central timing base reference for the deceleration and t 1 -t 0 measurements.
Claim 8
Independent Claim
211 words
A method for sampling projectile fuze data generated by a fuze of a projectile during a period of target impact and penetration, and recording a time difference between initial impact time t 0 and a fuze detonation time t 1 , comprising: (a) selectively energizing logic circuits and a transducer required to operate during sampling, processing and storage of data during a period of target impact and penetration; (b) resetting a timing and control logic unit, a time interval counter and a shift register to an initial state after said projectile is fired but prior to target impact; (c) initiating said time interval counter and an amplitude encoder at a time t 0 when the fuze first strikes a target, by a momentary closure of a g-switch; (d) providing timing and control for transfer of binary information in a logical format and in an ordered sequence; (e) deriving a logic pulse corresponding to the time of impact t 0 ; (f) deriving a logic indication at the time of fuze detonation t 1 by conduction of an ionization switch, and obtaining a binary count corresponding to a time interval t 1 -t 0 ; and (g) providing a central timing base reference for the deceleration and t 1 -t 0 measurements.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-07-27 | 1985-01-26 | 1985-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-07-27 | 1989-01-26 | 1989-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-07-27 | 1993-01-26 | 1993-07-28 | $7700.00 | Window Closed / Lapsed |