US3787845A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Collision alarming system
Assignee: Furuno Electric Co Ltd
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Filing: 1972-10-17
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Granted: 1974-01-22
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Expires: 1992-10-17
Abstract
Abstract A collision alarm system for detecting the course of an object and producing an alarm should its course indicate the possibility of a collision with the vehicle carrying the system. It includes a transmitter for transmitting pulses and a receiver for receiving reflected pulses. The reflected pulses are detected at at least two successive points in time with the information first detected being stored and then fed out at a predetermined later time related to the sweep rate of the transmitted pulses. The fed out pulses and the pulses detected at the second time point are compared and an alarm is sounded when a coincidence is detected.
Inventors
- 👤 H Kubota
- 👤 T Suzuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 07:05
CPC Classifications
G; G01; G01S; G01S13/00; G01S13/88; G01S13/93; G01S13/937
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
137 words
A collision alarm system comprising a transmitting and receiving device for emitting a directive periodic pulse wave which sweeps a predetermined space in a predetermined period, and receiving a reflected wave thereof, first sampling means for sampling said received reflected wave at a first time point within the pulse interval of said pulse wave, second sampling means for sampling said received reflected wave at a second time point within said pulse interval, storing means for storing the sample signal sampled by said first sampling means and feeding out said signal at every cycle of said sweep, comparing means for comparing the output signal of said storing means with the sample signal sampled by said second sampling means and producing an output when the both coincide, and an alarm device driven by said output of said comparing means.
Claim 2
Dependent Claim
137 words
A collision alarm system comprising a transmitting and receiving device for emitting a directive periodic pulse wave which sweeps a predetermined space in a predetermined period, and receiving a reflected wave thereof, first sampling means for sampling said received reflected wave at a first time point within the pulse interval of said pulse wave, second sampling means for sampling said received reflected wave at a second time point within said pulse interval, storing means for storing the sample signal sampled by said first sampling means and feeding out said signal at every cycle of said sweep, comparing means for comparing the output signal of said storing means with the sample signal sampled by said second sampling means and producing an output when the both coincide, and an alarm device driven by said output of said comparing means.
Claim 3
Dependent Claim
64 words
A collision alarm system according to claim 1 wherein said storing means is arranged so that the memory content is fed out at respective time points before, at and after the completion of said sweep cycle, and said comparing means is arranged so that an output is produced when either one of said outputs coincides with said sample signal of said second sampling means.
Claim 4
Dependent Claim
55 words
A collision alarm system according to claim 1 Wherein said first and second sampling means are arranged to effect a plurality of samplings at said first and second time points respectively, whereby the output is produced from said comparing means when the sample signals at each sampling of both time points coincide with each other.
Claim 5
Dependent Claim
35 words
A collision alarm system according to claim 1 wherein said storing means is a shift register including a plurality of serial flip-flops driven by a clock pulse which is synchronous with said period of sweeping.
Claim 6
Dependent Claim
252 words
A collision alarm system comprising a transmitting and receiving system for emitting a directive periodic pulse wave which sweeps a predetermined space in a predetermined period, and receiving a reflected wave thereof, first sampling means for sampling said received reflected wave at a first time point within the pulse interval of said pulse wave, second sampling means for sampling said received reflected wave at a second time point within said pulse interval, first storing means for storing the sample signal by said first sampling means and feeding it out during each cycle of sweep as first, second and third output signals at respective time points before, at and after the completion of said cycle of sweep, second storing means for storing the sample signal sampled by said second sampling means for a time period corresponding to said period of sweep and feeding it out as first, second and third output signals at respective time points before, at and after the completion of said cylcle of sweep, first comparing means for comparing said first and second output signals of said first and second storing means and producing an output when both first outputs are absent and both second outputs are present, second comparing means for comparing said second and third output signals of said first and second storing means and producing an output when both second outputs are present and both third outputs are absent, and first and second alarm devices driven by the outputs of said first and second comparing means respectively.
Claim 7
Dependent Claim
252 words
A collision alarm system comprising a transmitting and receiving system for emitting a directive periodic pulse wave which sweeps a predetermined space in a predetermined period, and receiving a reflected wave thereof, first sampling means for sampling said received reflected wave at a first time point within the pulse interval of said pulse wave, second sampling means for sampling said received reflected wave at a second time point within said pulse interval, first storing means for storing the sample signal by said first sampling means and feeding it out during each cycle of sweep as first, second and third output signals at respective time points before, at and after the completion of said cycle of sweep, second storing means for storing the sample signal sampled by said second sampling means for a time period corresponding to said period of sweep and feeding it out as first, second and third output signals at respective time points before, at and after the completion of said cylcle of sweep, first comparing means for comparing said first and second output signals of said first and second storing means and producing an output when both first outputs are absent and both second outputs are present, second comparing means for comparing said second and third output signals of said first and second storing means and producing an output when both second outputs are present and both third outputs are absent, and first and second alarm devices driven by the outputs of said first and second comparing means respectively.
Claim 8
Dependent Claim
65 words
A collision alarm system according to claim 5 wherein each of said first and second storing means is a shift register including a plurality of serial flip-flops driven by a clock pulse which is synchronous with said period of sweep, and said first, second and third outputs are respectively fed out from the second flip-flop from the last, the last flip-flop and the first flip-flop.
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) | 1977-01-21 | 1977-07-23 | 1978-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-21 | 1981-07-23 | 1982-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-21 | 1985-07-23 | 1986-01-22 | $7700.00 | Window Closed / Lapsed |