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1. 发明专利

JPH0868841A RADIO WAVE INCOMING DIRECTION DETECTOR 失效
公开(公告)号：JPH0868841A
公开(公告)日：1996-03-12
申请号：JP22860494
申请日：1994-08-30
申请人： NEC CORP
发明人： MIYAMOTO KATSUO
IPC分类号： G01S3/18 , G01S3/12 , G01S3/24 , G01S3/66 , G01S7/285 , G01S7/38
摘要： PURPOSE: To detecting the incoming direction of a radio wave having narrow pulse width. CONSTITUTION: Delay lines 8a-8f having delays, corresponding at least to the switching time difference of a switch 6, is inserted between the output terminals of directive antennas 7a-7f and the corresponding input terminals of the switch 6, respectively. The timing selected at each switching input terminal of the switch 6 and the receiving time of incoming signal are then adjusted. Consequently, even when the pulse width of radio wave is too narrow to be neglected as compared with the switching time of the switch 6, the switch 6 can switch the signal received by any directive antenna surely without causing extinction thereof and can deliver the signal to a pulse amplitude detector 5. Consequently, the incoming direction of radio wave having narrow pulse width can be detected accurately.

2. 发明专利

JPH0854454A RADIO DETECTOR 失效
公开(公告)号：JPH0854454A
公开(公告)日：1996-02-27
申请号：JP21211794
申请日：1994-08-12
申请人： NEC CORP
发明人： KOBAYASHI YUKIHIKO
IPC分类号： G01S3/18 , G01S7/285 , G01S7/38
摘要： PURPOSE:To realize a radio detector having a high system receiving-sensitivity in all receiving direction by a single receiving processing system. CONSTITUTION:Signal detecting circuits (2-1 to 2-4) and signal delay circuits (3-1 to 3-4) are provided in one to one correspondence at the outputs of a multi- beam antenna 1 having a plurality of directional beams. A receiving beam discriminator 4 discriminates a beam receiving a predetermined radio wave from the detected results of the plurality of the circuits 2-1 to 2-4 and gives its receiving number to a signal switching circuit 5 and a receiving processor 6. The signal switching circuit 5 selects the outputs of the circuits 3-1 to 3-4 indicated by a received beam number, and gives it to the receiving processor 6. That is, the signal received by the directional beam is given directly to the processor 6. Accordingly, a radio detector having high system receiving sensitivity (signal detecting sensitivity, radio data measuring sensitivity and signal processing sensitivity) can be realized.

3. 发明专利

JPS6447906A EVALUATING APPARATUS OF GLOBE SENSOR 失效
公开(公告)号：JPS6447906A
公开(公告)日：1989-02-22
申请号：JP20568887
申请日：1987-08-19
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： KIMURA MICHIO
IPC分类号： G01C1/00 , B64G1/36 , B64G7/00 , G01J1/00 , G01M11/00 , G01S3/18 , G02B26/04
摘要： PURPOSE:To obtain an evaluating apparatus, which can examine a globe sensor simply, by providing an electric control means of a shutter, which can set the intermittent time width of infrared rays and the repeating period of the time width arbitrarily. CONSTITUTION:A period counter 5 counts clock pulses (k). Every time the number of the pulses corresponding to the period for the counted value is counted, a pulse signal (a) having the width of the pulse corresponding to the period is generated. The signal (a) is added to a code width counter 6. The pulses (k) are further added. Until the time the specified number of the pulses (k) is counted from the rise-up time of the pulse, a pulse signal (b) having the width of the pulse corresponding to the period is generated. When, the signal (b) is applied to a shutter driver 3, an electromagnetic shutter 2 is opened during the time corresponding to the width of a globe code. The shutter 2 is closed for the other time. Therefore, infrared rays at a black body plate 1 can be made to be intermittently lighted and inputted into the globe sensor. When the counted values of the counters 5 and 6 are changed, the repeating period and the width of the intermittent time of the infrared rays can be change.

4. 发明专利

JPS6385473A METHOD FOR ARRANGING ANTENNA UNIT FOR RADIO DIRECTION FINDING AND RADIO DIRECTION FINDER USING ITS METHOD 失效
公开(公告)号：JPS6385473A
公开(公告)日：1988-04-15
申请号：JP23301386
申请日：1986-09-30
申请人： KODEN ELECTRONICS CO LTD
发明人： HOSHIKO YOSHISABURO , MIWA KATSUJI , NOMOTO KENJI
IPC分类号： G01S3/18
摘要： PURPOSE:To measure the arrival direction of a radio wave by arranging many directional antennas which differ in directivity in a linear or optionally curved beltlike zone. CONSTITUTION:The zone between border lines 1a and 1b is the contour of the linear or curved beltlike zone 3. Antennas A1, A2, A3, A4, A7 and A8 form an antenna group having directivity as shown by arrows and have their arrangement center on a line 2 which runs through the beltlike zone 3 almost in the center, and the respective antennas are placed away from disturbing interference installed bodies 4a and 4b which are sited outside the border lines 1a and 1b and disturb the propagation of a radio wave or interfere with the respective antennas directly. A switching circuit 11 switches and connects antenna output signals 1C-8C in the order determined with a switching signal 12a to obtain a switching detection signal, which is supplied to a sampling circuit 16 and an A/D converting circuit 17 through the receiving and amplifying circuit 13 and AM detecting circuit 14 of the next stage. An azimuth component data signal 17a is outputted as an azimuth position signal by a processing circuit 18 and displayed on a display circuit 19.

5. 发明专利

JPS58103675A DETECTING DEVICE FOR ARRIVAL BEARING OF DETECTED RADIO WAVE 失效
公开(公告)号：JPS58103675A
公开(公告)日：1983-06-20
申请号：JP20292281
申请日：1981-12-15
申请人： MITSUBISHI ELECTRIC CORP
发明人： KIJIMA TAKESHI
IPC分类号： G01S3/18
摘要： PURPOSE:To obtain a detecting device for detected radio wave arrival bearing which is capable of executing an exact and stable bearing display, without being influenced by a variation of a signal level of radio waves, by smoothing a receiving level at every antenna before calculating a bearing data. CONSTITUTION:Digital signal level receiving at each bearing through directional antennas 1a-1d which are switched in order by a controlling circuit 4, and a receiver 2, etc. are stored in registers 5a-5d corresponding to the antennas 1a-1d, respectively. This stored contents are smoothed with time division by smoothing circuits 7a-7d on a basis of a specified equation to apply to a bearing calculating circuit 6, and to display a radio wave arrival bearing on an indicator 8. By this smoothing system, even if a level of an arrival radio wave is varied while the receiving system is switched and connected to the antenna, its variation is eliminated to obtain a detected radio wave arrival bearing detector which is capable of displaying the arrival radio wave bearing exactly and stably.

6. 发明专利

JPS5818178A DIRECTION FINDER 失效
公开(公告)号：JPS5818178A
公开(公告)日：1983-02-02
申请号：JP11514481
申请日：1981-07-24
申请人： KODEN ELECTRONICS CO LTD
发明人： TANAKA ISOICHI , SATOU NOBUO , MIWA KATSUJI
IPC分类号： G01S3/48 , G01S3/04 , G01S3/18 , G01S3/54
摘要： PURPOSE:To store azimuth even when azimuth signals are interrupted and to instant aneously correspond to a new azimuth signal, by controlling a recording storage circuit with low impedance charging and high impedance interruption characteristics in accordance with the presence/absence of the azimuth signals. CONSTITUTION:Reception signals from 4 dipole antennas in the north, east, south and west sequentially switched are detected at an azimuth component detecting circuit 4, DC-converted and integrated at an integration circuit 10N via an analog switch 20 of a gate circuit 9N opened with a signal corresponding to antenna switching, and becomes an azimuth detection output with the north antenna or the like. This output is applied to a storage capacitor 25 of a time constant circuit with a prescribed time constant with low impedance charge and hig himpedance interruption of a storage circuit 12N. Thus, even with the absence of an azimuth signal, the preceeding information can stab and surely be stored and the new azimuth information can instantaneously be corresponded, allowing to constitute a direction finder with less error.

7. 发明专利

JPS52155091A AUTOMATIC DIRECTION FINDER 失效
公开(公告)号：JPS52155091A
公开(公告)日：1977-12-23
申请号：JP7205776
申请日：1976-06-18
申请人： JAPAN RADIO CO LTD
发明人： UCHIDA TOYOKI
IPC分类号： G01S3/18

9. 发明专利

JP3523041B2 Azimuth measurement processing unit 失效
公开(公告)号：JP3523041B2
公开(公告)日：2004-04-26
申请号：JP859898
申请日：1998-01-20
申请人：株式会社東芝
发明人：鎮男秋山
IPC分类号： G01S3/18

10. 发明专利

JP2002323548A METHOD AND SYSTEM FOR SURVEYING DIRECTION OF SPACE WAVE NOISE 失效
公开(公告)号：JP2002323548A
公开(公告)日：2002-11-08
申请号：JP2001130951
申请日：2001-04-27
申请人： NOISE LAB CO LTD
发明人： EGUCHI TSUGIO
IPC分类号： G01R29/08 , G01S3/18 , H01Q9/16 , H01Q21/28
摘要： PROBLEM TO BE SOLVED: To provide a method and system for surveying a direction of space wave noise capable of facilitating a survey of a generating direction of the space wave noise in a field. SOLUTION: The system includes first and second antenna groups 11, 12 having a pair of antennas for receiving the space wave noise, a waveform measuring means 20 for measuring the space wave noise received by the respective antennas of the first and second antenna groups 11, 12, a waveform direction calculating means 35 for taking in waveform data measured by the waveform measuring means 20, calculating an incoming direction and angle from a time difference from the waveform data of the first antenna group 11, and calculating the incoming direction from the time difference from the waveform data of the second antenna group 12, and a generating direction determining means 37 for determining the generating direction of the space wave noise from the incoming direction and the angle calculated by the waveform direction calculating means 35.

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