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1.发明授权Echo-sounding apparatus using fourier transformation 失效ECHO-SOUNDING APPARATUS USING FOURIER TRANSFORMATION
公开(公告)号：US3803606A
公开(公告)日：1974-04-09
申请号：US27605172
申请日：1972-07-28
Applicant: CIT ALCATEL
Inventor： LEBAIL P , FAUGERAS A , CASTANET A
CPC classification number: G01S15/18 , G01S15/8977
Abstract: An echo sounding apparatus having a source of coherent waves and an array of detectors each providing an output signal significant of the phase and amplitude of that portion of a wave reflected from the target to which the coherent wave from the source is directed. Sampling circuitry samples the outputs of the detectors at periods delayed with respect to a sampling origin time by an amount proportional to the square of the distance from the sampled detector to a reference point in the array. A calculator is then provided for carrying out a Fourier transformation on each sample to provide an output signal representative of the target.
Abstract translation: 一种具有相干波源和一组检测器的回波探测设备，每个检测器提供显着的来自源的相干波的反射的波的该部分的相位和幅度的输出信号的输出信号。 采样电路将相对于采样原点时间延迟的周期的检测器的输出采样成与从采样检测器到阵列中的参考点的距离的平方成正比的数量。 然后提供一个计算器，用于对每个样本进行傅里叶变换，以提供代表目标的输出信号。
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公开(公告)号：US3852745A
公开(公告)日：1974-12-03
申请号：US35568473
申请日：1973-04-30
Applicant: CIT ALCATEL
Inventor： LEBAIL P
CPC classification number: G01S15/8977 , G01S1/02 , G01S7/6218
Abstract: Multiple sonde of the Fourier transformation type. The signals which are representative of the radiation received by detectors, coming from an irradiated object, by means of a coherent radiation, are sampled at two instants separated by a quarter of a period and the samples constitute the true and imaginary parts of the function to which the Fourier transformtion is applied, according to the coordinates of the detectors.
Abstract translation: 傅立叶变换类型的多个探头。 代表通过相干辐射来自被照射物体的检测器所接收的辐射的信号在两分之一时间间隔四分之一周期进行采样，并且样本构成函数的真和虚部， 根据检测器的坐标，进行傅里叶变换。
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公开(公告)号：SE377386B
公开(公告)日：1975-06-30
申请号：SE981472
申请日：1972-07-27
Applicant: CIT ALCATEL
Inventor： LEBAIL P , GAUGERS A-M , CASTANET A
Abstract: An echo sounding apparatus having a source of coherent waves and an array of detectors each providing an output signal significant of the phase and amplitude of that portion of a wave reflected from the target to which the coherent wave from the source is directed. Sampling circuitry samples the outputs of the detectors at periods delayed with respect to a sampling origin time by an amount proportional to the square of the distance from the sampled detector to a reference point in the array. A calculator is then provided for carrying out a Fourier transformation on each sample to provide an output signal representative of the target.
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公开(公告)号：GB1339093A
公开(公告)日：1973-11-28
申请号：GB3376972
申请日：1972-07-19
Applicant: CIT ALCATEL
Inventor： LEBAIL P , GAUGERS A-M , CASTANET A
Abstract: 1339093 Echo-sounding COMPAGNIE INDUSTRIELLE DES TELECOMMUNICATIONS CIT-ALCATEL 19 July 1972 [28 July 1971] 33769/72 Heading H4D In an echo-sounding system of the type in which waves reflected from a target are incident on an array of detectors, and in which the detector output signals are sampled and the resulting sampled instantaneous distribution of wave energy over the array is Fourier transformed to produce a representation of the target, allowance for curvatuve of the wavefronts is made by sampling the signals from the detectors at respective instants delayed with respect to a sampling time origin by amounts proportional to the squares of the respective distances of the detectors from a reference point in the array. In the Fig. 1 embodiment a detector array 6 receives pulsed ultrasonic waves reflected from a target 2. The detector outputs are amplified at A1-A1600, frequency-down-converted in mixers M1-M1600 and fed to first sampling circuits E1-E16 and second, similar sampling circuits G1-G16. Sampling circuits E1 and G1 are associated with the detectors located in a first of sixteen angular sectors centred on array point PO, circuits E2 and G2 are associated with the detectors in the second sector, and so on. In each sampling circuit E the outputs of all detectors of a sector are time-divisionmultiplexed by a switching circuit C, sampled and digitized by circuit K then de-multiplexed by addressing circuit T whose outputs are stored in signal memories V. The multiplexing and demultiplexing stages of all circuits E are synchronized by a clock H. A variable delay circuit 16 triggers the emission of pulses from clock H after a time interval, following the transmission of an ultrasonic pulse from transmitter 4, equal to the echo-time of the waves from a target at a given range. After a further time interval, equal to one quarter of the period of the signal at the output of mixers M1- M1600, a similar clock J is triggered to emit pulses for controlling multiplexers Q and demultiplexers U in the sampling circuits G1-G16. The outputs of demultiplexers U are stored in signal memories W. A predetermined number of clock pulses is required to produce each switching action in the circuits E and G; this number may be constant, e.g. unity, if the detectors are regularly arranged in array 6, or may be varied during the sampling cycle if the detectors are arranged irregularly, e.g. in pseudo-random manner. The pulse frequency of clocks H and J, and hence the sampling delay, is varied by device 26 so as to be proportional to target range. The complex Fourier transform of the contents of memories V and W is formed by a calculator TF and controls a display 12. Instead of sampling the detector outputs at mutually delayed instants, the detector outputs may be differently delayed as a function of the square of the detector distance from the array reference point and the delayed signals are then sampled simultaneously (Fig. 2, not shown).
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Patent Agency Ranking
公开(公告)号：BE786437A
公开(公告)日：1973-01-19
申请号：BE786437D
Applicant: CIT ALCATEL
Inventor： LEBAIL P , GAUGERS A-M , CASTANET A
Abstract: An echo sounding apparatus having a source of coherent waves and an array of detectors each providing an output signal significant of the phase and amplitude of that portion of a wave reflected from the target to which the coherent wave from the source is directed. Sampling circuitry samples the outputs of the detectors at periods delayed with respect to a sampling origin time by an amount proportional to the square of the distance from the sampled detector to a reference point in the array. A calculator is then provided for carrying out a Fourier transformation on each sample to provide an output signal representative of the target.
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公开(公告)号：FR2147469A5
公开(公告)日：1973-03-09
申请号：FR7127668
申请日：1971-07-28
Applicant: CIT ALCATEL
Inventor： LEBAIL P , GAUGERS A-M , CASTANET A
Abstract: An echo sounding apparatus having a source of coherent waves and an array of detectors each providing an output signal significant of the phase and amplitude of that portion of a wave reflected from the target to which the coherent wave from the source is directed. Sampling circuitry samples the outputs of the detectors at periods delayed with respect to a sampling origin time by an amount proportional to the square of the distance from the sampled detector to a reference point in the array. A calculator is then provided for carrying out a Fourier transformation on each sample to provide an output signal representative of the target.
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公开(公告)号：NL7210331A
公开(公告)日：1973-01-30
申请号：NL7210331
申请日：1972-07-27
Applicant: CIT ALCATEL
Inventor： LEBAIL P , GAUGERS A-M , CASTANET A
Abstract: An echo sounding apparatus having a source of coherent waves and an array of detectors each providing an output signal significant of the phase and amplitude of that portion of a wave reflected from the target to which the coherent wave from the source is directed. Sampling circuitry samples the outputs of the detectors at periods delayed with respect to a sampling origin time by an amount proportional to the square of the distance from the sampled detector to a reference point in the array. A calculator is then provided for carrying out a Fourier transformation on each sample to provide an output signal representative of the target.
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公开(公告)号：NL160100C
公开(公告)日：1979-09-17
申请号：NL7210331
申请日：1972-07-27
Applicant: CIT ALCATEL
Inventor： LEBAIL P , GAUGERS A-M , CASTANET A
Abstract: An echo sounding apparatus having a source of coherent waves and an array of detectors each providing an output signal significant of the phase and amplitude of that portion of a wave reflected from the target to which the coherent wave from the source is directed. Sampling circuitry samples the outputs of the detectors at periods delayed with respect to a sampling origin time by an amount proportional to the square of the distance from the sampled detector to a reference point in the array. A calculator is then provided for carrying out a Fourier transformation on each sample to provide an output signal representative of the target.
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公开(公告)号：NL160100B
公开(公告)日：1979-04-17
申请号：NL7210331
申请日：1972-07-27
Applicant: CIT ALCATEL
Inventor： LEBAIL P , GAUGERS A-M , CASTANET A
Abstract: An echo sounding apparatus having a source of coherent waves and an array of detectors each providing an output signal significant of the phase and amplitude of that portion of a wave reflected from the target to which the coherent wave from the source is directed. Sampling circuitry samples the outputs of the detectors at periods delayed with respect to a sampling origin time by an amount proportional to the square of the distance from the sampled detector to a reference point in the array. A calculator is then provided for carrying out a Fourier transformation on each sample to provide an output signal representative of the target.
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