US4779075A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for absolute displacement determination
Assignee: Siemens AG
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Filing: 1986-12-05
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Granted: 1988-10-18
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Expires: 2006-12-05
Abstract
Abstract To make possible a technically uncomplicated and reliable absolute displacement determination--in particular for the position determination of robot drives--a cyclic position transmitter (L) and a revolution transmitter (U) rigidly coupled therewith are provided, the sum signal of which indicates the displacement. As revolution transmitter there is used a transmitter (U) which makes use of the Wiegend effect.
Inventors
- 👤 Walter Zagelein
- 👤 Dieter Rechinger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:49
CPC Classifications
G; G05; G05B; G05B19/00; G05B19/02; G05B19/18; G05B19/19; G05B19/21; F; F02; F02P; F02P7/00; F02P7/06; F02P7/067; F02P7/0672; G01; G01D; G01D5/00; G01D5/12; G01D5/244; G01D5/245; G01D5/2454; G01D5/2455; G01D5/2457; G01P; G01P3/00; G01P3/42; G01P3/44; G01P3/48; G01P3/481; G01P3/4815; G01D2205/00; G01D2205/20; G01D2205/26
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
238 words
A device for determining absolute displacement comprising: a revolution transmitter for generating a revolution signal including a predetermined number of voltage pulses having amplitudes independent of a velocity of rotation of said revolution transmitter, said revolution transmitter including signal generating means for generating said voltage pulses by making use of a Weingand or Large-Barkhausen effect; said revolution transmitter comprising a first sensor means, a second sensor means and a reference sensor means for generating corresponding first, second and reference pulses; a pulse evaluating circuit receiving said first, second and reference pulses and including first and second memory elements, each having a set and a reset state, said memory elements being reset by said reference signal, said first memory element being set by said first pulse to indicate a counterclockwise rotation, and said second memory element being set by said second pulse to indicate a clockwise rotation, and counting means including an up/down counter having an up-count input coupled to said first memory element and a down-count input connected to said second memory element for indicating a current number of full revolutions corresponding to a respective absolute displacement; a position transmitter rigidly coupled to said revolution transmitter which executes a plurality of revolutions over a given path for generating in each instance a position signal corresponding to its angular position, said position signal being generated independently of said revolution signal; and means for superimposing said revolution and position signals.
Claim 2
Independent Claim
238 words
A device for determining absolute displacement comprising: a revolution transmitter for generating a revolution signal including a predetermined number of voltage pulses having amplitudes independent of a velocity of rotation of said revolution transmitter, said revolution transmitter including signal generating means for generating said voltage pulses by making use of a Weingand or Large-Barkhausen effect; said revolution transmitter comprising a first sensor means, a second sensor means and a reference sensor means for generating corresponding first, second and reference pulses; a pulse evaluating circuit receiving said first, second and reference pulses and including first and second memory elements, each having a set and a reset state, said memory elements being reset by said reference signal, said first memory element being set by said first pulse to indicate a counterclockwise rotation, and said second memory element being set by said second pulse to indicate a clockwise rotation, and counting means including an up/down counter having an up-count input coupled to said first memory element and a down-count input connected to said second memory element for indicating a current number of full revolutions corresponding to a respective absolute displacement; a position transmitter rigidly coupled to said revolution transmitter which executes a plurality of revolutions over a given path for generating in each instance a position signal corresponding to its angular position, said position signal being generated independently of said revolution signal; and means for superimposing said revolution and position signals.
Claim 3
Dependent Claim
42 words
The device of claim 1 further comprising first time delay means for resetting said second memory element by said first pulse, and a second time delay means for resetting said first memory element by said second pulse, after a preset time delay.
Claim 4
Dependent Claim
73 words
The device of claim 1 wherein said first and second sensor means are disposed in corresponding first and second adjacent sectors for generating a first identifying signal when a reference point (M) on said revolution transmitter is disposed in said first sector and a second identifying signal when said reference point is disposed in said second sector, said first and second memory elements being set respectively by said first and second identifying signals.
Claim 5
Dependent Claim
32 words
The device of claim 3 wherein said first and second identifying signals are time-delayed by said second and first time delay means respectively to reset said second and first memory elements respectively.
Claim 6
Dependent Claim
51 words
The device of claim 3 further comprising supply voltage monitoring means for monitoring supply voltage for said position transmitter, said monitoring means generating a monitor signal when said supply voltage is at a preset level, said first and second identifying signals being generated only upon the presence of said monitor signals.
Claim 7
Dependent Claim
25 words
The device of claim 1 further comprising an uninterruptable power supply for providing power to said position transmitter, said revolution transmitter and said counting means.
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) | 1991-10-18 | 1992-04-18 | 1992-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-10-18 | 1996-04-18 | 1996-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-10-18 | 2000-04-18 | 2000-10-18 | $7700.00 | Window Closed / Lapsed |