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公开(公告)号：JPH06161339A
公开(公告)日：1994-06-07
申请号：JP31195792
申请日：1992-11-20
Applicant: ADVANTEST CORP
Inventor： KITAYOSHI HITOSHI
Abstract: PURPOSE:To provide a hologram observation device which can display an image with high resolution. CONSTITUTION:Reference data obtained by a fixed sensor 1 and scan data at respective points which are obtained by a scanning sensor 2 scanning an observed surface 3 are converted into frequency spectrum, which are processed by relative vector operation to obtain hologram data; and a two-dimensional frequency analyzing means 5 takes the frequency analysis of those hologram data to obtain image data. In this hologram observation device, two cascaded frequency analyzing means 5A and 5B which constitute the two-dimensional frequency analyzing means 5 and analyze frequencies in an (x) and a (y) direction are so structured that the results of frequency analyses taken by fast Fourier transforming means 8A and 8B are weighted with the frequency analysis results of frequency analyzing means 7A and 7B operation according to a complexified maximum entropy method and then taken out.
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72.发明专利
公开(公告)号：JPH06160445A
公开(公告)日：1994-06-07
申请号：JP31195692
申请日：1992-11-20
Applicant: ADVANTEST CORP
Inventor： KITAYOSHI HITOSHI
Abstract: PURPOSE:To obtain highly accurate high-resolution analyzed results irrespective of the discrete frequency of Fourier transformation by estimating the true frequency, amplitude, and phase of a true line spectrum by calculation when a frequency spectrum obtained as a result of fast Fourier transformation is judged as the true line spectrum. CONSTITUTION:When three spectra are adjacent to each other and the phases of the upper and lower spectra fall with a permissible range among discrete frequency spctra obtained as a result of fast Fourier transformation 4, the frequency, amplitude, and phase of a true spectrum are found by performing interpolation discrimination 5 and interpolation processing 7 on the three spectra by regarding that the three spectra are dispersed from the true frequency. Then the spectrum data are accumulated 12 and, at the same time, the spectrum data are reversely converted into time base data by performing inverse Fourier transformation 8 on the data and the time base data are accumulated 9. A subtractor 11 subtracts the accumulated data from input data and the subtracted result in again inputted to a window function weighting means 3. Since the interpolated spectrum is displayed 6 as a line spectrum in a state where the residual energy is lowered, the accuracy and resolution of this frequency analyzing device can be improved.
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公开(公告)号：JPH0682502A
公开(公告)日：1994-03-22
申请号：JP23492492
申请日：1992-09-02
Applicant: ADVANTEST CORP
Inventor： KITAYOSHI HITOSHI
IPC: G01R27/26
Abstract: PURPOSE:To allow measurement in a short time through a single measuring circuit. CONSTITUTION:Both opposite ends of an electric double layer capacitor 11 to be measured is connected with a power supply 23 side and previously charged up to about a DC measuring voltage. Switches 21, 22 are then switched to the fixed contact (b) side to apply the DC measuring voltage from a power supply 24 and an AC voltage from an AC power supply 14 onto the capacitor 14 to be measured. AC voltage drop Vv across the capacitor 11 at that time is determined through a subtracting circuit 33 and AC current flowing through the capacitor 11 at that time is determined as a voltage Vi through a current/ voltage converting circuit 26. Output voltage VvXRf (Rf represents feedback resistance of the current/voltage converting circuit 26) from the substracting circuit 33 is then divided by the voltage Vi to determine an impedance having real part representative of DC resistance Rs of the capacitor 11 and imaginary part Im representative of the capacitance.
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公开(公告)号：JPH02190771A
公开(公告)日：1990-07-26
申请号：JP1173389
申请日：1989-01-19
Applicant: ADVANTEST CORP
Inventor： KITAYOSHI HITOSHI
Abstract: PURPOSE:To accurately measure the voltage across a body to be measured without damaging an element for measurement by detecting conduction between 1st and 3rd contactors and 2nd and 4th contactors, and detecting whether or not there is a potential difference between specific contactors. CONSTITUTION:When the resistance between the 1st and 3rd contactors 13 and 18 decreases, a large current flows to the secondary side of a transformer 32, and consequently the potential at the contact 38 rises and the output of an inverter 39 varies from high level to low level. Similarly, when the resistance between the 2nd and 4th contactors 16 and 19 decreases, the output of an inverter 46 varies to the low level as well. Consequently, the conduction between the respective contactors is detected. Further, when there is any potential difference between at least two of the contactors 13, 16, 18, and 19 coming into contact with electrodes 12 and 15 of the body 1 to be measured, the potential at a contact point 61 rises and a transistor 62 turns on the cause variation of the output of the inverter 62 from the low level to the high level, so a high voltage developed between contactors can be detected before four-terminal contacting, and a signal source 14, a current-voltage converter 17, buffer amplifiers 21 and 22 for voltage detection, etc., are prevented from damaging.
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公开(公告)号：JPH02190770A
公开(公告)日：1990-07-26
申请号：JP1173289
申请日：1989-01-19
Applicant: ADVANTEST CORP
Inventor： KITAYOSHI HITOSHI
IPC: G01R27/02
Abstract: PURPOSE:To eliminate a system noise, and to attain an accurate measurement by providing a device in which currents come from a 1st, 2nd signal generators of direct frequency combining type (generators) and from an object to be measured are combined and vector-detected. CONSTITUTION:An output of the 1st generator consisting of a phase accumulator 43, sinewave memory 46, latch circuits 51, 52, D/A converter 53, and LPE 54, is supplied to the object to be measured from a terminal 61 through a transformer, and at the same time a current flowing in the object is conducted from the transformer. Then, this current and an output of the 2nd generator level- adjusted 64 are converted to voltages and combined by a combining circuit 65, and also an output of the object is inputted to a differential amplifier 85 from terminals 81, 82. Next, outputs of the circuit 65 and the amplifier 85 are changed-over by a switch 94 and multiplied with sinewave/cosinewave for outputs of the latch circuits 89, 91 and D/A converter 92, 93, then integrated 97, 98 and subjected to sample and hold 99, 101 with a Q output of FF 49. These outputs are changed-over by a switch 102, and converted 103, calculated 104 and displayed 105.
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Patent Agency Ranking
公开(公告)号：JP2000356661A
公开(公告)日：2000-12-26
申请号：JP16648599
申请日：1999-06-14
Applicant: ADVANTEST CORP
Inventor： KITAYOSHI HITOSHI
Abstract: PROBLEM TO BE SOLVED: To enable high-speed observation and stable observation to be performed. SOLUTION: Antenna elements A1-A24 of a ring array antenna are distributed and connected sequentially to switch-mounted power combiners SH1, SH2, SH3. When a direct wave arrives from the direction of A5 and a reflected wave arrives from the direction of A3, A2, A5 and A8 in the SH2 are selected and reception signals thereof are inputted into a receiver Rr and Sr(2+5+8, f) is obtained as an output, and each antenna element of the SH1 and the SH3 is selected sequentially and reception signals are inputted into a receiver Rm and Sm(1, f), Sm(3, f),... are obtained as outputs, and outputs of Rr and Rm are made to interfere with each other by an interferer 11 and an interference output is detected to obtain data E(K, L). A3, A4, A6 and A7 are selected and reception signals thereof are inputted into Rr, and each antenna element of the SH2 is selected sequentially and reception signals are inputted into Rm, and data E(K, L) are obtained in the same way, and a performance function is operated relative to the obtained E(K, L) and hologram regeneration is executed.
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公开(公告)号：JPH11326483A
公开(公告)日：1999-11-26
申请号：JP12877098
申请日：1998-05-12
Applicant: ADVANTEST CORP
Inventor： KITAYOSHI HITOSHI
Abstract: PROBLEM TO BE SOLVED: To accurately specify a radio wave emitting source such as an illegal radio station, and to objectively evaluate transmission electric power of the radio wave emitting source. SOLUTION: The arrival direction of a radio wave is observed by plural sensor stations A to C (Step 101), and a position of an observation point is decided on the basis of data in the arrival direction of the radio wave (Step 102). Next, the observation point is commanded to a radiophotograph observing car 13 (Step 103), and the radiophotograph observing car 13 is moved to the commanded observation point (Step 104). A radiophotograph is acquired by observing a radio wave hologram at the commanded observation point by the radiophotograph observing car 13 (Step 105) to specify a radio wave emitting source. Transmission electric power in the radio wave emitting source is estimated from brightness of an image in the radiophotograph and a distance value up to the radio wave emitting source (Step 106).
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公开(公告)号：JPH11326480A
公开(公告)日：1999-11-26
申请号：JP13046098
申请日：1998-05-13
Applicant: ADVANTEST CORP
Inventor： KITAYOSHI HITOSHI
Abstract: PROBLEM TO BE SOLVED: To accurately specify positions of plural radio wave emission sources operated in the same frequency zone, and monitor the utilization state of the radio wave, by using only one sensor station. SOLUTION: In a sensor station where radio wave hologram observation is executed, one or more scanning antennas 23 scanning along a prescribed route, plural fixed antennas 21 having different directions or positions, an interferer 30 by which signals received by the scanning antennas 23 and signals received by the fixed antennas 21 are made to interfere with each other, a detector 31 by which the interfering signals are detected in the complex system and changed to detection outputs, and respective detection outputs formed by combining the scanning antennas 23 with the fixed antennas 21, are stored temporarily as a complex scanning data matrix. Then, a buffer and an operation part 32 are installed and a complex weighted addition process is executed to the complex scanning data matrix, to thereby reproduce a facial distribution of radio wave emission sources.
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公开(公告)号：JPH11149240A
公开(公告)日：1999-06-02
申请号：JP31741897
申请日：1997-11-18
Applicant: ADVANTEST CORP
Inventor： KITAYOSHI HITOSHI
Abstract: PROBLEM TO BE SOLVED: To provide a multidimensional hologram data processor with easy algorism easily formed into hard ware and digital signal processing(DSP), and an extracting method for plural peak points and their occupying areas in multidimensional hologram data. SOLUTION: This multidimensional hologram data processor is composed of a N-dimensional data array memory 1, a N-dimensional flag array memory 2, a N-dimensional array address producing part 3, and a digital signal processing part 4. N-dimensional array data are written in the N-dimensional data array memory 1, flag values of N-dimensional array are written in the N-dimensional flag array memory 2, addresses of N-dimensional array data are produced in the N-dimensional array address producing part 3, the digital signal processing part 4 controls the N dimensional array address producing part 3 and performs algorism to output peak point detection values and area detection values.
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公开(公告)号：JPH10239364A
公开(公告)日：1998-09-11
申请号：JP3910797
申请日：1997-02-24
Applicant: ADVANTEST CORP
Inventor： KITAYOSHI HITOSHI
Abstract: PROBLEM TO BE SOLVED: To cancel the effect of an offset amount of a phase lock loop produced in the change-over of observation frequency by using the correlation value of the same surge signal with a plurality of measuring systems. SOLUTION: Observation signals SH(f), SV(f) of horizontal and vertical polarization components in an optional point on a hologram observation surface 11 received by a scanning antenna 12 and one of observation signals SR(f) outputted from a fixed antenna 3 and selected by a change-over switch 17 are inputted through a filtering part 15 to a multiplication means 24, and the signal SR(f) are inputted through a filter ring part 16 to the multiplication means 24. The output of the multiplication means 24 is inputted to an SFL vector detector 26 through a narrow band pass filter 25 of the center frequency f0 to perform the composite Fourier integration and obtain three kinds of vector detecting output values AR, AH, AV corresponding to the correlated value. Interference observation data CH, CV for the horizontal and vertical components calculated by a interference calculation section 27 cancel the effect of an offset amount of a phase lock loop caused by the change-over of an ovservation frequency.
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