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1. 发明专利

JPH0882667A PASSIVE RANGING APPARATUS 失效
公开(公告)号：JPH0882667A
公开(公告)日：1996-03-26
申请号：JP21870794
申请日：1994-09-13
申请人： JAPAN TECH RES & DEV INST , OKI ELECTRIC IND CO LTD
发明人： HARADA SUMIO , FUJIMOTO OSAMU , IGARASHI MASAO
IPC分类号： G01S3/808 , G01S5/22
摘要： PURPOSE: To obtain a passive ranging apparatus by which a beam-forming processing amount is reduced and by which a computation resource is distributed effectively. CONSTITUTION: A target to be searched and its priority degree are designated by a search processing part 17. Selected received signals out of input signals are beam- formed for respective targets by beam-forming processing parts 11-A, 11-B, 11-C. An arrival time difference and a correlation function are computed by correlation-time- difference processing parts 12-a, 12-2. An S/N ratio is estimated by S/N-ratio-estimation processing parts 13-1, 13-2. When the S/N ratio is higher than a threshold value, the number of wave-receiver elements is reduced by a wave-receiver-element selection part 15 according to the priority degree, and the wave-receiver elements are selected so as to reduce a beam-forming processing amount. When the S/N ratio is lower than the threshold value, the wave-receiver elements are selected so as to increase the number of wave-receiver elements according to a beam-forming processing capability. The baseline length of a wave-receiver arrangement is computed by a wave- receiver-position computation part 16. The distance of the target is computed by a distance-estimation processing part 14 so as to be outputted to an output terminal 18.

2. 发明专利

JPH04250381A METHOD OF THREE-DIMENSIONAL PHASING 失效
公开(公告)号：JPH04250381A
公开(公告)日：1992-09-07
申请号：JP91091
申请日：1991-01-09
申请人： OKI ELECTRIC IND CO LTD
发明人： YANAI SHINJI , IGARASHI MASAO
IPC分类号： G01S3/82 , G01S7/523
摘要： PURPOSE:To reduce the error of a phasing result in an allowable range without largely increasing the amount of horizontal phasing process of a previous step, when a face array is formed into cylindrical shape, and when a plurality of sensors that form the face array are arranged irregularly. CONSTITUTION:The vertical (elevation/depression) phasing direction of vertical phasing device groups 30-1 to 30-P of a rear step are divided into a plurality of groups, and a representative upward/downward phasing direction is determined for each group. The phasing of horizontal phasing device groups 20-1 to 20M of a previous step is carried out for each group in consideration of the representative vertical phasing direction. The phasing in the vertical direction determined for each group is then carried out in the vertical phasing device groups 30-1 to 30-P of the rear step for the aforementioned group by using the horizontal phasing result of the group. The vertical phasing may be carried out in a previous step, while the horizontal phasing may be carried out in a rear step.

3. 发明专利

JPH0499981A RECEIVING METHOD FOR WIDE BAND SIGNAL OF PASSIVE SONAR 失效
公开(公告)号：JPH0499981A
公开(公告)日：1992-03-31
申请号：JP21836690
申请日：1990-08-20
申请人： OKI ELECTRIC IND CO LTD
发明人： YANAI SHINJI , IGARASHI MASAO
IPC分类号： G10K11/34 , G01S3/808
摘要： PURPOSE:To reduce the omission of the power data of a wide-band signal by detecting a pulse-like signal at every beam and frequency using the time series data of instantaneous power and controlling an integration constant on the basis of said signal. CONSTITUTION:A received wide-band signal is divided into narrow-band components at every multibeams of a beam former 5 by frequency analysers 111 - 11N and instantaneous power densities are calculated at every frequencies by instantaneous power density calculators 121 - 12N and, further, pulse-like signals are detected at every beams and frequencies by pulse detectors 131 - 13N using the time series data of the instantaneous power densities. Integration constants for calculating long-time integration powers are set at every frequencies used in pulse detection by integration constant setting devices 141 - 14N and the integration to the instantaneous power densities is performed at every divided frequencies by integrators 151 - 15N using the set integration constants and the intergrated power densities are added at every beams within a frequency region by power calculators 161 - 16N to output long-time integration powers. By this method, the effect of a pulse signal is removed and the power of the wide-band signal can be continuously obtained without being omitted.

4. 发明专利

JPH0311668B2 失效
公开(公告)号：JPH0311668B2
公开(公告)日：1991-02-18
申请号：JP6454983
申请日：1983-04-14
申请人： OKI ELECTRIC IND CO LTD
发明人： IGARASHI MASAO , NITORI KAZUHIKO
IPC分类号： G01S7/526 , G01S3/48 , G01S7/02 , G01S7/285 , G01S7/292 , G01S13/36 , G01S13/42 , H03D3/00

5. 发明专利

JPS6348461B2 失效
公开(公告)号：JPS6348461B2
公开(公告)日：1988-09-29
申请号：JP311882
申请日：1982-01-12
申请人： OKI ELECTRIC IND CO LTD
发明人： IGARASHI MASAO
IPC分类号： H04L25/497 , G01S7/52 , G01S7/526 , H04B11/00 , H04L27/00

6. 发明专利

JPS628082A TRACKING SYSTEM IN SONAR 失效
公开(公告)号：JPS628082A
公开(公告)日：1987-01-16
申请号：JP14720285
申请日：1985-07-03
申请人： OKI ELECTRIC IND CO LTD
发明人： NISHIMURA HIROSHI , IGARASHI MASAO
IPC分类号： G01S15/66 , G01S3/807
摘要： PURPOSE:To increase an estimation accuracy by estimating the azimuth of a target sound source by the beam output of an adaptive beam former (queuing ABF) with a high S/N ratio. CONSTITUTION:A signal from a target sound source is received by a receiver array 10 and a queuing beam is formed by a nonadaptive beam former (queuing CBF) for the output signal of the receiver array 10. An approximate azimuth of the target sound source is obtained using a queuing beam output. Since the queuing beam is formed by a queuing waiting ABF 70 with a high S/N ratio at a beam output only in the minimum azimuths necessary for an interpolation using the information of the azimuth of the target sound source thus obtained whereby the azimuth of the target sound source is estimated, the accurate azimuth of the target sound source can be estimated.

7. 发明专利

JPS61254869A SYSTEM FOR CORRECTING DIRECTION ESTIMATING ERROR 失效
公开(公告)号：JPS61254869A
公开(公告)日：1986-11-12
申请号：JP9607185
申请日：1985-05-08
申请人： OKI ELECTRIC IND CO LTD
发明人： IGARASHI MASAO
IPC分类号： G01S3/80 , G01S3/805 , G01S3/82
摘要： PURPOSE:To make a device for eliminating direction estimating errors smaller in size and simpler in constitution, by analytically calculating the errors from the difference in previously given phase responses, positional coordinates of an array element, weighting coefficient of a beam former, and a power spectrum in the vicinal direction of a signal source. CONSTITUTION:Signals from a signal source are received by arrays 11-1M composed of plural wave receivers arrayed in a space and added to each other after they are compensated for time delay and weighted by means of a beam former 4 after passing through amplifiers 2 and filters 3. On the other hand, a direction cosine error calculator 21 calculates a direction estimating error from outputs of registers 22-25, which respectively store power spectra L1-LK in the vicinity of a signal source direction alpha0, positional coordinates P1-PM of the array elements, weighting coefficients b1-bM of the beam former 4, and differences in the phase response of the array elements, and an array constant register 26. The direction estimating error thus calculated is eliminated by subtracting it at an adder 20.

8. 发明专利

JPS59210384A Reception system for low frequency signal 失效
标题翻译：低频信号接收系统
公开(公告)号：JPS59210384A
公开(公告)日：1984-11-29
申请号：JP8402883
申请日：1983-05-16
申请人： Oki Electric Ind Co Ltd
发明人： IGARASHI MASAO
IPC分类号： G01S7/523 , G01S7/02 , G01S7/28
CPC分类号： G01S7/2813
摘要： PURPOSE:To improve the S/N of a low frequency receiving signal by using an adaptive noise canceler that receives a beam output having a minimum point of beam sensitivity in a desired signal source direction as a reference input. CONSTITUTION:Outputs signals of elements 211-21M and 221-22M in a circular sensor array 20 are inputted to multiplexers 111 and 112. The multiplexers 111 and 112 select outputs with the output of a controller 17, and the selected signals are processed by the subtraction of an adder 12, whose output is inputted to the adaptive noise canceler 30 through an amplifier 132 and a band-pass filter 142. The output signal of a sensor 10 for low frequency reception, on the other hand, is inputted to the noise canceler 30 through an amplifier 131 and a band-pass filter 141. The adaptive noise canceler 30 has an adaptive filter 31 and an adder 32, and an output signal having an improved S/N ratio appears at an output terminal 40.
摘要翻译：目的：通过使用自适应噪声消除器来提高低频接收信号的S / N，该自适应噪声消除器在期望的信号源方向上接收具有最小光束灵敏度点的光束输出作为参考输入。构成：将圆形传感器阵列20中的元件211-21M和221-22M的信号输出输入到多路复用器111和112.复用器111和112用控制器17的输出选择输出，所选择的信号由加法器12的减法，其输出通过放大器132和带通滤波器142输入到自适应噪声消除器30.另一方面，用于低频接收的传感器10的输出信号被输入到噪声消除器30通过放大器131和带通滤波器141.自适应噪声消除器30具有自适应滤波器31和加法器32，并且具有改善的S / N比的输出信号出现在输出端子40处。

9. 发明专利

JPS59116564A Position error measuring system for array element 失效
标题翻译：阵列元件的位置误差测量系统
公开(公告)号：JPS59116564A
公开(公告)日：1984-07-05
申请号：JP22590782
申请日：1982-12-24
申请人： Oki Electric Ind Co Ltd
发明人： IGARASHI MASAO
IPC分类号： H01Q3/26 , G01B17/00 , G01S7/40 , G01S7/52 , G01S7/523
CPC分类号： G01S3/82
摘要： PURPOSE:To eliminate preliminary information by calculating position errors using an estimated value of a signal source position corresponding to a measured value and compensation of time or phase difference between array elements after delayed compensation and a constant of the array determined by geometrical shape of the array and loads of respective elements. CONSTITUTION:Signals are received with array elements 111...11M and undergo a delayed compensation with delay compensators 211...21M and then, after totalized with a totalizer 22, converted into an envelop signal with an envelop detector 23 to be outputted as estimated value from a signal source position estimating device 24. Delays DELTAdelta2(k)...DELTAdeltaM(k) are measured and inputted into delay errors calculators 262...26M. A constant of the array determined by a load pertaining to geometrical shape of the array and a load is used to calculate delay errors DELTAtau2(k)...DELTAtauM(k) caused by position errors difference DELTAP2,1...DELTAPM,1. Registers 272...27M memorize calculated values of delay errors at k=1, 2 and 3 to form a delay error vector which is inputted into position errors calculator 312...31M.
摘要翻译：目的：通过使用对应于测量值的信号源位置的估计值和延迟补偿后的阵列元件之间的时间或相位差的补偿以及由阵列的几何形状确定的阵列的常数来计算位置误差来消除初步信息和各个元件的负载。构成：使用阵列元件111 ... 11M接收信号，并用延迟补偿器211 ... 21M进行延迟补偿，然后在用积分器22累加后，用包络检测器23转换为包络信号，作为来自信号源位置估计装置24的估计值。延迟DELTAdelta2（k）... DELTAdeltaM（k）被测量并输入到延迟误差计算器262 ... 26M。由与阵列的几何形状和负载相关的负载确定的阵列的常数用于计算由位置误差差DELTAP2,1 ... DELTAPM，1引起的延迟误差DELTAtau2（k）... DELTAtauM（k）。寄存器272 ... 27M存储在k = 1,2和3处的延迟误差的计算值，以形成输入到位置误差计算器312 ... 31M的延迟误差向量。

10. 发明专利

JPH07239376A TARGET MOTION ANALYSIS METHOD 失效
公开(公告)号：JPH07239376A
公开(公告)日：1995-09-12
申请号：JP2929394
申请日：1994-02-28
申请人： OKI ELECTRIC IND CO LTD
发明人： OKITA YOSHIO , IGARASHI MASAO
IPC分类号： G01S3/808 , G01S7/52
摘要： PURPOSE:To obtain correct distance information and to shorten the converging time to obtain the result of motion analysis without maneuvering and changing speed of a sailing body. CONSTITUTION:An arrival time difference tau1, 3(k) between signals from a target to a heading array and a towing array is determined by a propagation time difference calculating section 32 in addition to an observation value at an azimuth obtained from an output signal of a receiver sensor array of the heading array, the towing array or the like. An azimuth information calculating section 33 calculates a straight line connecting the center of the axis linking the acoustic center of the heading array and the acoustic center of the towing array and a target and an azimuth psi1, 3(k) of an axis connecting the acoustic center of the heading array and the acoustic center of the towing array. With no maneuvering of a sailing body, a distance is determined by a range calculating section 34 between the sailing body and the target. The position of the target and the momentum of speed thereof are calculated by an observation vector generating section 22, a trajectory calculating section 23 and a square error calculating section 24 and the like based on the distance and the azimuth thus obtained.

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