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公开(公告)号：US3656096A
公开(公告)日：1972-04-11
申请号：US3656096D
申请日：1970-05-07
申请人： US NAVY
CPC分类号： G01S3/801 , G01S7/534 , G11C29/003
摘要： A digital delay time compression circuit (DELTIC) having a shift register to produce a 512 bit delay with an input from an AND-OR gating circuit to sample hydrophone data and recirculate this data in the shift register, or optionally through a one-bit flipflop delay, to produce delayed and compressed digital words of 512 or 513 bits on an output thereof for correlation with other hydrophone data, and enabling and blocking pulse means applied to the AND-OR gating circuits to pass test words to periodically test the DELTIC for proper operation.
摘要翻译： 具有移位寄存器的数字延迟时间压缩电路（DELTIC），用于产生与来自AND门控电路的输入相比512位延迟，以对水听器数据进行采样，并将该数据再循环在移位寄存器中，或者可选地通过一位翻转 在其输出上产生512或513位的延迟和压缩数字字，用于与其他水听器数据相关，并且使能和阻塞施加到AND-OR选通电路的脉冲装置通过测试字以周期性地测试DELTIC 为正确操作。
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公开(公告)号：US3585577A
公开(公告)日：1971-06-15
申请号：US3585577D
申请日：1969-06-12
申请人： SOUTHWEST RES INST
CPC分类号： G01S7/52003 , G01S7/534 , Y10S367/903
摘要： Simplified ultrasonic transceiving apparatus preferably incorporating transducer means coupling ultrasonic vibrations into a medium, said means being bidirectional in operation to also convert vibrations from the medium into electrical signals; an oscillatory signal applied to said transducer means for propagation into the medium, and means forming an output signal combining the oscillatory signal and vibrations received from within the medium into an electrical signal.
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63.发明授权Method and apparatus for increasing the angular definition of the direction indication in sonar systems 失效用于增加声纳系统中方向指示的角度定义的方法和装置
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64.发明授权Converter circuit multiplying slight difference frequency between at least two frequency components of single input 失效转换器电路在单个输入的至少两个频率分量之间乘以微小的差分频率
公开(公告)号：US3325739A
公开(公告)日：1967-06-13
申请号：US39679564
申请日：1964-09-04
申请人： HONEYWELL INC
CPC分类号： G01S15/52 , G01S7/534 , Y10S367/901
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公开(公告)号：US3296580A
公开(公告)日：1967-01-03
申请号：US41180464
申请日：1964-11-17
申请人： SMITH & SONS LTD S
发明人： ROY HOPKIN PETER
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公开(公告)号：US3202968A
公开(公告)日：1965-08-24
申请号：US13405861
申请日：1961-08-25
CPC分类号： G01S7/534 , G01S7/352 , Y10S367/901
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公开(公告)号：US2566858A
公开(公告)日：1951-09-04
申请号：US54279544
申请日：1944-06-29
申请人： SEBRING PAUL B
发明人： SEBRING PAUL B
CPC分类号： G01S7/534 , G01S1/72 , G01S7/529 , Y10S367/901
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68.发明公开公开(公告)号：US20240069182A1
公开(公告)日：2024-02-29
申请号：US17765349
申请日：2021-05-21
发明人： Liang CUI , Lei WANG , Yangbing LI , Yingzi WANG , Jiabin WANG , Yubo WANG , Yanling HAN
IPC分类号： G01S7/534
摘要： The disclosure provides an ultrasonic signal detection circuit including a sensing circuit, a unidirectional conduction circuit and a source follower circuit. The sensing circuit is connected to an input terminal of the source follower circuit through the unidirectional conduction circuit; the sensing circuit is configured to generate a piezoelectric signal according to a received ultrasonic echo signal and output the piezoelectric signal to the unidirectional conduction circuit. The piezoelectric signal is an alternating current signal; the unidirectional conduction circuit is configured to rectify the alternating current signal to only allow a forward or a reverse current portion thereof to pass through. The forward/reverse current portion charges/discharges the input terminal of the source follower circuit after passing through the unidirectional conduction circuit. The source follower circuit is configured to generate a detection signal according to a voltage at its input terminal and output the detection signal through its output terminal.
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公开(公告)号：US11914066B1
公开(公告)日：2024-02-27
申请号：US17182672
申请日：2021-02-23
摘要： Multiplexed phased array sonar systems and methods for consumer fishfinders are described herein. In one embodiment a single curved transmit transducer and an array of receive transducers are provided, and in an embodiment the signals from the receive transducers are multiplexed, which greatly reduces the data load, allowing for the achievement of the near real time, high resolution imagery in a size and price point that enables this technology to be employed in a consumer fish finder.
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公开(公告)号：US20240036195A1
公开(公告)日：2024-02-01
申请号：US18450248
申请日：2023-08-15
申请人： DENSO CORPORATION
发明人： Yu KOYAMA , Tetsuya AOYAMA
IPC分类号： G01S15/931 , G01S7/534
CPC分类号： G01S15/931 , G01S7/534
摘要： An object detection device includes a drive signal generator that generates a drive signal including frequency modulation, a first correlation filter that performs correlation detection between the reception signal and a first reference signal corresponding to the drive signal, a first determiner that determines, based on the correlation signal from the first correlation filter, whether the reception signal is a reflected wave of the probe wave transmitted from the transmitter, a second correlation filter that performs correlation detection between the reception signal and a second reference signal corresponding to a portion of the drive signal, a third correlation filter that performs correlation detection between the reception signal and a third reference signal corresponding to another portion of the drive signal having higher frequencies than the second reference signal, and a second determiner that determines whether there is an object within a detection region based on correlation signals from the second and third correlation filters.
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