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US3673552A
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Method and apparatus for compiling measured values of a variable parameter
Assignee: Fried Krupp AG
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Filing: 1970-03-30
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Granted: 1972-06-27
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Expires: 1990-03-30
Abstract
Abstract A method and apparatus primarily intended for commercial fishing craft for compiling at an observation station measured values of a variable parameter existing at one or more measuring locations spaced from the observation station by producing a signal which is a function of the instantaneous value of the variable parameter, feeding it to a pulse duration modulator, to produce a modulated pulse whose duration is a function of the instantaneous value of the variable parameter, and controlling the initiation of the modulated pulses by a system which emits a train of spaced wave pulses through one or more acoustical transducers, so that the initiation of the modulated pulses is in a fixed time relation with the wave pulses. A suitable short-interval range recording device is disposed at the observation station, and is connected for receiving the modulated pulses and recording their duration along with the echose of the wave pulses. When a plurality of measured value generators is used, a programmed switch mechanism may be employed to connect the individual generators with their respective wave pulse generators.
Inventors
- 👤 Siegfried Mross
- 👤 Hans Grossheim
- 👤 Michel Aubert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:05
CPC Classifications
G; G01; G01S; G01S7/00; G01S7/003
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
180 words
An apparatus for compiling at an observation location measured values of a variable parameter existing at a measuring location spaced from the observation location, comprising, in combination: a. transmission means connected between the measuring location and the observation location; b. a measuring value generator disposed at the measuring location for producing a signal which is a function of the instantaneous value of the variable parameter; c. a pulse duration modulator connected to the output of said measuring value generator to receive the signal fed out therefrom for producing a modulated pulse the duration of which is a function of the instantaneous value of the variable parameter; d. a clock pulse generator connected to said pulse duration modulator for controlling the initiation of such modulated pulses; e. means emitting a train of spaced wave pulses and connected to said clock pulse generator for causing the modulated pulses to be produced in a fixed time relation with the wave pulses; and f. short-interval range recording means disposed at the observation location and connected for receiving the modulated pulses and recording their duration.
Claim 2
Independent Claim
180 words
An apparatus for compiling at an observation location measured values of a variable parameter existing at a measuring location spaced from the observation location, comprising, in combination: a. transmission means connected between the measuring location and the observation location; b. a measuring value generator disposed at the measuring location for producing a signal which is a function of the instantaneous value of the variable parameter; c. a pulse duration modulator connected to the output of said measuring value generator to receive the signal fed out therefrom for producing a modulated pulse the duration of which is a function of the instantaneous value of the variable parameter; d. a clock pulse generator connected to said pulse duration modulator for controlling the initiation of such modulated pulses; e. means emitting a train of spaced wave pulses and connected to said clock pulse generator for causing the modulated pulses to be produced in a fixed time relation with the wave pulses; and f. short-interval range recording means disposed at the observation location and connected for receiving the modulated pulses and recording their duration.
Claim 3
Dependent Claim
46 words
An apparatus as defined in claim 1, further comprising means connected to the output of said pulse duration modulator to emit an artificial echo pulse which is adapted to the transmission characteristics of said transmission channel at the end of the Duration of the modulated pulse.
Claim 4
Dependent Claim
39 words
An apparatus as defined in claim 2 wherein said means to emit an echo pulse includes a monostable multivibrator connected with the output of said pulse duration modulator, and an oscillator connected to the output of said monostable multivibrator.
Claim 5
Dependent Claim
33 words
An apparatus as defined in claim 3 wherein said train of spaced wave pulses has a carrier frequency and the frequency of said oscillator corresponds to the carrier frequency of the wave pulses.
Claim 6
Dependent Claim
51 words
An apparatus as defined in claim 4, wherein said means emitting a train of wave pulses includes means to receive the echo of the wave pulses, and further including short-interval range recording means for measuring and indicating the travel time of the wave pulses and the duration of the modulated pulses.
Claim 7
Dependent Claim
64 words
An apparatus as defined in claim 5, further including means disposed at the observation location for varying the timing of the train of spaced wave pulses, and means disposed at said measuring location connected to said means for varying the timing of the train of spaced wave pulses to adjust said pulse duration modulator as a function of the spacing of the wave pulses.
Claim 8
Dependent Claim
23 words
An apparatus as defined in claim 6, wherein said means for varying the spacing of the wave pulses is a measuring range selector.
Claim 9
Dependent Claim
37 words
An apparatus as defined in claim 7, wherein said means for adjusting said pulse duration modulator is a counting and gating circuit which varies said pulse duration modulator inversely proportional to the spacing of the wave pulses.
Claim 10
Dependent Claim
32 words
An apparatus as defined in claim 8 wherein said clock pulse generator is an adjustable clock pulse generator varying its frequency so that it corresponds with the spacing of the wave pulses.
Claim 11
Dependent Claim
40 words
An apparatus as defined in claim 9 further including a battery disposed at the measuring location to be a current source and which is connected with means disposed at the observation location to connect and disconnect it to the system.
Claim 12
Dependent Claim
73 words
An apparatus as defined in claim 10, further including switching means disposed at said measuring location and connected in series with said battery, and timing means disposed at said measuring location and connected to said switch means to control said switch means, so that said switch means connects said battery into the system when wave pulses are being emitted and disconnects said battery from the system when no wave pulses are being emitted.
Claim 13
Dependent Claim
34 words
An apparatus as defined in claim 11, further including a water-pressure sensitive switch connected in series with said battery for connecting the battery into the system when a predetermined minimum pressure has been exceeded.
Claim 14
Dependent Claim
39 words
An apparatus as defined in claim 1, wherein a plurality of measuring value generators are disposed at at least one measuring location, and wherein each generator is connected to a respective one of a plurality of pulse duration modulators.
Claim 15
Dependent Claim
25 words
An apparatus as defined in claim 13, further including means to distinguish the measured value signals of the respective measuring value generators from one another.
Claim 16
Dependent Claim
20 words
An apparatus as defined in claim 14 further including switching means which can interrogate said plurality of measuring value generators.
Claim 17
Dependent Claim
15 words
An apparatus as defined in claim 15, wherein said switching means is a shift register.
Claim 18
Dependent Claim
54 words
An apparatus as defined in claim 16 wherein said means for emitting a train of spaced wave pulses is a plurality of acoustical transducers each sending out pulses in a different sounding direction, and wherein said plurality of measuring value generators are each connected to a respective one of said plurality of acoustical transducers.
Claim 19
Dependent Claim
32 words
An apparatus as defined in claim 17 wherein said switching means switches said measured value generators to correspond to the acoustical transducers, and wherein said switching means is a programmed switching mechanism.
Claim 20
Dependent Claim
61 words
An apparatus as defined in claim 18 further including a towed fishing net, and wherein there are two measuring locatioNs and the variable parameter is temperature, a first measuring location being disposed at a temperature measuring location at the top of said net and a second measuring location being disposed at a temperature measuring location at the bottom of said net.
References Cited (Backward Citations)
DE1157976B
Cited
US3444510A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-27 | 1975-12-27 | 1976-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-27 | 1979-12-27 | 1980-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-27 | 1983-12-27 | 1984-06-27 | $7700.00 | Window Closed / Lapsed |