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1. 发明专利

JP2002122661A FM-CW RADAR OF 1 ANTENNA TIME SHARING CONTROL SYSTEM 失效
公开(公告)号：JP2002122661A
公开(公告)日：2002-04-26
申请号：JP2000312173
申请日：2000-10-12
申请人： FUJITSU TEN LTD
发明人： IKUNO MASAYOSHI
IPC分类号： G01S7/03 , G01S7/28 , G01S7/34 , G01S13/34
摘要： PROBLEM TO BE SOLVED: To prevent a transmission power from being leaked to a receiving system through a transmission/receiving changeover part by improving separation between the transmission and the receiving in a FM-CW radar of 1 antenna time sharing control system. SOLUTION: Amplifiers are provided in signal paths of the transmission system and the receiving system respectively and the amplifier provided in the transmission system and the amplifier provided in the receiving system are alternately operated according to the timing of the transmission and the receiving so as to change over between the transmission and the receiving. The amplifiers are operated by controlling the again of the amplifiers. The amplifiers are turned on/off by controlling the gain.

2. 发明专利

JP2000147087A GAIN CONTROL DEVICE AND METHOD FOR MILLIMETER-WAVE RADAR 失效
公开(公告)号：JP2000147087A
公开(公告)日：2000-05-26
申请号：JP32094398
申请日：1998-11-11
申请人： FUJITSU TEN LTD
发明人： KAJIOKA HIDEKI , IKUNO MASAYOSHI , KISHIDA MASAYUKI , YAMANO SHINICHI
IPC分类号： G01S7/285 , G01S13/34 , G01S13/93
摘要： PROBLEM TO BE SOLVED: To control gain with a simple means and to prevent saturation of waveforms of reception signals by a method, wherein when a reception level reaches a level in which a reception part saturates, a transmission output or a reception input is turned off. SOLUTION: After beat signals output from a mixer 9 are amplified by an amplifier 21, they pass though a filter 23 and are input into a decision circuit 24, and are input into a DSP(digital signal processor) and microcomputer 13. Receiving control signals a, b from the DSP and the microcomputer 13, ON-OFF drive signals SWT are fed from a transmission side drive control part 25 into Amp (T), and on-off drive signals SWR are fed from a reception side drive control part 26 into an Amp (R), respectively. OFF control signals c are fed from the DSP and microcomputer 13 into the transmission side drive control part 25 and reception side drive control part 26. When the reception part reaches a saturation level, one of the transmission output and reception input is turned off, thereby controlling the gain.

3. 发明专利

JPH06186323A RADAR FAULT DETECTION CIRCUIT 失效
公开(公告)号：JPH06186323A
公开(公告)日：1994-07-08
申请号：JP33567092
申请日：1992-12-16
申请人： FUJITSU LTD , FUJITSU TEN LTD
发明人： SHIRATORI HIDEKI , SUZUKI HIROSHI , IKUNO MASAYOSHI
IPC分类号： G01S7/40
摘要： PURPOSE:To provide a circuit for detecting fault of a radar that prevents misunderstanding of information due to fault, by detecting fault of a mixer which is a component of a radar. CONSTITUTION:A power source 15 applies a valiable voltage V1 to an active element 50 constituting a mixer of a radar, and at that time, current I1 flowing through the active element 50 is measured by a current measurement means 16. The reference current value 12 outputted, according to the variable voltage V1, from a reference current output means 17 by the supply of the variable voltage V1, and the previously measured measurement current value I1' are compared with each other in specified points by a comparison/decision means 18, and if no relationship is found, alarm signal S1 that reports abnormality in the active element 50 is outputted.

4. 发明专利

JP2009281882A Radar transceiver and radar device 审中-公开
标题翻译：雷达收发器和雷达装置
公开(公告)号：JP2009281882A
公开(公告)日：2009-12-03
申请号：JP2008134555
申请日：2008-05-22
申请人： Fujitsu Ten Ltd , Toyota Central R&D Labs Inc , Toyota Motor Corp , トヨタ自動車株式会社 , 富士通テン株式会社 , 株式会社豊田中央研究所
发明人： HONDA KANAKO , IKUNO MASAYOSHI , SAKAGUCHI MASAHIRO , OGAWA MASARU , YAMADA NAOYUKI
IPC分类号： G01S13/34
摘要： PROBLEM TO BE SOLVED: To provide a radar transceiver capable of sampling a frequency difference signal of a transmission/reception signal with a minimal configuration.
SOLUTION: The radar transceiver comprises: an antenna part for transmitting a radar signal as a transmission signal and receiving the transmission signal reflected on an object as a reception signal; a switching means for switching either the transmission signal or the reception signal by a switching frequency signal; a mixer for generating a first frequency difference signal of the radar signal and the reception signal; and a sampling part for sampling the first frequency difference signal in synchronization with the switching frequency and for detecting a second frequency difference signal of the radar signal and the reception signal. As the second frequency difference signal can be directly sampled from the first frequency difference signal, a mixer etc. for generating a frequency difference signal of the first frequency difference signal and the switching frequency signal can be omitted.
COPYRIGHT: (C)2010,JPO&INPIT
摘要翻译：要解决的问题：提供能够以最小配置对发送/接收信号的频差信号进行采样的雷达收发器。解决方案：雷达收发器包括：天线部分，用于发送雷达信号作为发送信号，并接收反射在对象上的发送信号作为接收信号; 切换装置，用于通过开关频率信号切换发送信号或接收信号; 用于产生雷达信号和接收信号的第一频差信号的混合器; 以及采样部，用于与开关频率同步地对第一频率差信号进行采样，并且用于检测雷达信号和接收信号的第二频差信号。由于可以从第一频差信号直接采样第二频差信号，所以可以省略用于产生第一频差信号和开关频率信号的频差信号的混频器等。版权所有（C）2010，JPO＆INPIT

5. 发明专利

JP2004294092A Fm-cw radar apparatus shared for transmission and reception 有权
标题翻译： FM-CW雷达设备共享传输和接收
公开(公告)号：JP2004294092A
公开(公告)日：2004-10-21
申请号：JP2003083083
申请日：2003-03-25
申请人： Fujitsu Ten Ltd , 富士通テン株式会社
发明人： IKUNO MASAYOSHI
IPC分类号： G01S13/34 , G01S7/03 , G01S7/28 , G01S7/34 , G01S13/60 , G01S13/93
CPC分类号： G01S7/034 , G01S7/34 , G01S13/345
摘要： PROBLEM TO BE SOLVED: To provide an FM-CW radar shared for transmission and reception and capable of appropriately detecting a target without having to enlarging the dynamic range of a reception part and appropriately processing reception signals according to the distance to the target. SOLUTION: The FM-CW radar apparatus shared for transmission and reception changes over between transmission and reception by time shared control. Signal paths of a transmission system and a reception system are each provided with an amplifier. By controlling the gain of the amplifier provided for the signal path of the reception system or the gain of the amplifier provided for the signal path of the transmission system, gains at front end parts in reception timing sections or front end parts in transmission timing sections are controlled. COPYRIGHT: (C)2005,JPO&NCIPI
摘要翻译：要解决的问题：提供共享用于发送和接收的FM-CW雷达，并且能够适当地检测目标，而不必扩大接收部分的动态范围，并根据到目标的距离适当地处理接收信号。解决方案：通过时间共享控制，在发送和接收之间传输和接收共享的FM-CW雷达装置发生变化。传输系统和接收系统的信号路径均设有放大器。通过控制为接收系统的信号路径提供的放大器的增益或为传输系统的信号路径设置的放大器的增益，发送定时部分中的接收定时部分或前端部分的前端部分的增益是受控。版权所有（C）2005，JPO＆NCIPI

6. 发明专利

JPH09211112A FM-CW RADAR 失效
公开(公告)号：JPH09211112A
公开(公告)日：1997-08-15
申请号：JP1661596
申请日：1996-02-01
申请人： FUJITSU TEN LTD
发明人： TAKAMASA NOBUO , IKUNO MASAYOSHI
IPC分类号： G01S13/34
摘要： PROBLEM TO BE SOLVED: To provide the radar, which can correct the modulation characteristics with a simple constitution. SOLUTION: A modulating-wave oscillator 1 is constituted of a pulse oscillator 11 and an integrator 12. The pulse oscillator 11 oscillates the pulses, wherein at least one of the duty ratio, the amplitude or the period is changed so that the modulating characteristic of a transmitting-wave oscillator 2 becomes linear. A correcting modulation wave is formed by integrating the pulses in the integrator 12. The oscillating frequency of the transmitting wave oscillator 2, which is modulated by using the correcting modulation wave, is transmitted from a transmitting antenna 3. The reflected wave reflected from a target is received by a receiving antenna 4 and converted into the beat signal, wherein the reflected wave and the transmitted wave branched and outputted from a directional coupler 5 are mixed in a mixer 6. In an operating device 7, the range or the relative speed is operated based on the beat signal.

7. 发明专利

JPH08327728A FM-CW RADAR EQUIPMENT 失效
公开(公告)号：JPH08327728A
公开(公告)日：1996-12-13
申请号：JP13524295
申请日：1995-06-01
申请人： FUJITSU TEN LTD
发明人： IKUNO MASAYOSHI
IPC分类号： G01S13/34 , G01S7/282
摘要： PURPOSE: To realize the FM-CW radar, which outputs the transmitting signal more approximate to a triangular wave with the simple constitution. CONSTITUTION: A modulating-signal generating means 1, which generates the triangular-wave shaped modulating signal, an transmitting device 2, which outputs the frequency-modulated high-frequency signal in accordance with the modulating signal, and a transmitting antenna 3, which transmits the high-frequency signal, are provided. Furthermore, a receiving antenna 4, which receives the reflected signal from a target body, a directional coupler 5, which separates a part of the high-frequency signal outputted to the transmitting antenna 3 from the originating device 2, and a mixer 6, which mixes the separated high-frequency signal and the reflected signal and outputs the beat signal, are provided. This is the FM-CW radar equipment, which has these parts and computes the distance to the target body based on the changes in frequency of the beat signal and in frequency synchronized with the modulating signal. A correcting means 7, which corrects the modulating signal outputted from the modulating-signal generating means 1 so that the frequency of the high-frequency signal outputted from the transmitting device 2 is changed into the triangular wave shape, is provided.

8. 发明专利

JPH0818343A CORRECTING CIRCUIT FOR IMPROVING MODULATION CHARACTERISTIC AND MODULATOR AND RADAR EQUIPMENT USING THIS CIRCUIT 失效
公开(公告)号：JPH0818343A
公开(公告)日：1996-01-19
申请号：JP17471594
申请日：1994-07-04
申请人： FUJITSU LTD , FUJITSU TEN LTD
发明人： SUZUKI HIROSHI , IKUNO MASAYOSHI
IPC分类号： G01S13/34 , G01S7/40 , H03B1/00 , H03B5/18 , H03C3/02 , H03C3/08 , H03C3/22
摘要： PURPOSE:To provide the correcting circuit, which equivalently corrects the differential gain characteristic of a modulator, and the modulator and the radar equipment which use this circuit. CONSTITUTION:A correcting circuit 1 is connected to the preceding stage of a voltage controlled oscillator 2, which has the oscillation frequency controlled by a control voltage, and corrects the differential gain of this voltage controlled oscillator 2. This correcting circuit 1 includes a first resistor R1, which is connected in series to the input side of the voltage controlled oscillator 2, and the series connection of a second resistor R2 and a first diode D1 which is connected in parallel to the input side of the voltage controlled oscillator 2. A first bias power source E1 which gives a bias in the forward direction is connected to the first diode D1.

9. 发明专利

JPH0643236A INPUT ABNORMALITY PROTECTIVE CIRCUIT FOR ON-VEHICLE RADAR EQUIPMENT 失效
公开(公告)号：JPH0643236A
公开(公告)日：1994-02-18
申请号：JP13655492
申请日：1992-05-28
申请人： FUJITSU LTD , FUJITSU TEN LTD
发明人： NAKANO YOSHIAKI , SUZUKI HIROSHI , IKUNO MASAYOSHI
IPC分类号： B60R21/00 , B60W30/00 , G01S7/28
摘要： PURPOSE:To protect an FET used for a low-noise amplifier from deterioration or breakage and report an abnormality of an on-vehicle radar equipment to a driver in the input abnormality protective circuit of the on-vehicle radar device having the countermeasure to protect the on-vehicle radar device against a too-large input or a too-small input. CONSTITUTION:When an abnormal input judging means judges a too-large input, a protective means 3 takes an action to protect an on-vehicle radar device. The drain voltage of an FET is practically decreased by a drain voltage decreasing means 3a to reduce the gain of the FET, or the transmission side output of the on-vehicle radar device is decreased by a transmission output decreasing means 3b. When the abnormal input means 2 judges a too-small input, a reporting means 4 reports an abnormality of the on-vehicle radar to a driver.

10. 发明专利

JP2004286555A Fm-cw radar apparatus shared for transmission and receiving 有权
公开(公告)号：JP2004286555A
公开(公告)日：2004-10-14
申请号：JP2003078246
申请日：2003-03-20
申请人： Fujitsu Ten Ltd , 富士通テン株式会社
发明人： IKUNO MASAYOSHI
IPC分类号： G01S7/35 , G01S13/34 , G01S13/58 , G01S13/93
CPC分类号： G01S7/034 , G01S7/352 , G01S7/354 , G01S13/345 , G01S13/584 , G01S13/931 , G01S2007/356
摘要： PROBLEM TO BE SOLVED: To reduce an FM (frequency modulation)-AM conversion noise, in an FM-CW (constant wave) radar apparatus shared for transmission and receiving.
SOLUTION: The apparatus, including a plurality of mixers for downconverting an IF signal, a plurality of switches respectively provided to the input side of the plurality of mixers, and a switch control part for controlling the plurality of switches to be turned on/off in different modes, selects the IF signal by the plurality of switches in the different modes, and supplies it to each of the plurality of mixers. The apparatus, including the plurality of mixers for downconverting the IF signal, the plurality of switches for controlling the duty ratios or the phases of respective local signals of the plurality of mixers, and the switch control part for controlling the plurality of switches to be turned on and off in the different modes, in which each of the plurality of mixers downconverts the IF signal by the local signal in the different modes.
COPYRIGHT: (C)2005,JPO&NCIPI

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