US3728026A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means for measuring distance when it is considered probable that foreign objects or particles are between the measuring instrument and the object to which the distance is to be measured
Assignee: ABB Norden Holding AB
•
Filing: 1971-11-08
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Granted: 1973-04-17
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Expires: 1991-11-08
Abstract
Abstract An arrangement for measuring distance under conditions when disturbances of various types may be expected to occur between the measuring instrument and the object to which the distance is to be measured comprises an emitter unit arranged to emit a series of electro-magnetic pulses in the direction of the object and a receiver unit, which only registers the very first echo from each single pulse emitted, and the echo which of all those registered has covered the longest distance is considered to comprise a measurement of the distance to the object in question.
Inventors
- 👤 E Idestrom
- 👤 B Ling
- 👤 A Persson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:29
CPC Classifications
G; G01; G01S; G01S13/00; G01S13/02; G01S13/06; G01S13/08; G01S13/10; G01S13/103
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
85 words
Means for measuring distance comprising a signal member including an emitter unit and a receiver unit, said emitter unit including means to emit a series of high frequency pulses towards an object, said receiver unit including means to register only the first echo of each pulse emitted, and means associated with the receiver unit to give an output signal proportional to that echo which of all those registered has covered the longest distance, thereby comprising a measurement of the distance to the object in question.
Claim 2
Dependent Claim
85 words
Means for measuring distance comprising a signal member including an emitter unit and a receiver unit, said emitter unit including means to emit a series of high frequency pulses towards an object, said receiver unit including means to register only the first echo of each pulse emitted, and means associated with the receiver unit to give an output signal proportional to that echo which of all those registered has covered the longest distance, thereby comprising a measurement of the distance to the object in question.
Claim 3
Dependent Claim
15 words
Means according to claim 1, in which said emitter unit comprises a pulsed semi-conductor laser.
Claim 4
Dependent Claim
64 words
Means according to claim 1, in which said receiver unit comprises a time-measuring device including means to measure the time which passes between the emission of a pulse from said emitter unit and the receipt of the first echo generated by said pulse, and to emit an output signal in the form of a time pulse which comprises a measurement of the Time measured.
Claim 5
Dependent Claim
58 words
Means according to claim 3, in which said receiver unit comprises an output device to which said time pulse is transmitted and which includes means to emit an output signal constituting a measurement of the longest of the time pulses transmitted to the output device, this pulse constituting a measurement of the distance to the object in question.
Claim 6
Dependent Claim
30 words
Means according to claim 1, which includes means responsive to the first echo of each pulse to render the receiver unit inoperative to receive any further echoes of such pulse.
References Cited (Backward Citations)
US3503680A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-04-16 | 1976-10-16 | 1977-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-16 | 1980-10-16 | 1981-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-16 | 1984-10-16 | 1985-04-17 | $7700.00 | Window Closed / Lapsed |