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    • 7. 发明公开
    • Periphery monitoring system
    • Umgebungsüberwachungssystem
    • EP1683693A1
    • 2006-07-26
    • EP06001342.2
    • 2006-01-23
    • Mazda Motor CorporationCircuit Design Inc.
    • Nakagawa, Makoto Mazda Motor CorporationOkada, Hideyuki Mazda Motor CorporationFujiwara, Michihide Mazda Motor CorporationMizutani, Noriaki
    • B60R25/10G08B13/16
    • G08B13/1627B60R25/1004B60R25/1009G01S13/56
    • In a periphery monitoring system for monitoring movements of a mobile object around an installation location of a Doppler sensor 1, a signal output from the Doppler sensor 1 is subjected to an FFT analysis, and a total sum of the frequency levels of all of the frequency bands obtained through the FFT analysis is calculated at predetermined time intervals. A reference level and abnormal level are set based on the calculated total sum. If the calculated total sum exceeds the abnormal level and falls to or below the abnormal level before a first set period passes since the exceeding of the abnormal level, the periphery status is determined to be abnormal. If the total sum exceeds the abnormal level but does not fall to or below the abnormal level even after the first set period passes since the exceeding of the abnormal level, the periphery status is determined to be normal, and the reference level is updated to a new reference level set based on total sums calculated during the first set period.
    • 在用于监测移动物体围绕多普勒传感器1的安装位置的运动的外围监视系统中,从多普勒传感器1输出的信号经受​​FFT分析,并且所有频率的频率水平的总和 以预定的时间间隔计算通过FFT分析获得的频带。 基于计算的总和设置参考水平和异常水平。 如果计算出的总和超过异常水平,则在超过异常水平之前经过第一设定周期之前,超过异常水平并且下降到或低于异常水平,则外围状态被确定为异常。 如果总和超过异常水平,即使在超过异常水平的第一设定期间过去之后也不会下降到或低于异常水平,则外围状态被确定为正常,并且将参考水平更新为 基于在第一个设定期间计算的总和的新参考水平设定。
    • 8. 发明公开
    • Wireless microphone with UHF band FM transmitter
    • Drahtloses Mikrofon mit FM-Sender im UHF-band
    • EP0905912A2
    • 1999-03-31
    • EP98117509.4
    • 1998-09-22
    • Circuit Design Inc.
    • Koike, Yukinaga
    • H04B1/04H03C3/09
    • H04B1/034
    • A wireless microphone use UHF band carrier FM transmitter adopting a PLL system, which has a voltage controlled crystal oscillation type modulator (VCXO) for performing FM modulation on an oscillation frequency of a crystal oscillation circuit by an input of a modulation signal AF of an acoustic signal and which uses an FM modulated signal f r obtained from the VCXO as a reference signal V r to be input to an analog phase comparator (PC) of a PLL circuit 60. The PC performs a phase comparison operation at a high speed (10 MHz or more), therefore a cutoff frequency of a loop filter (62) may be a high band frequency of about 100 KHz to 1 MHz so that the cutoff frequency considerably higher than the highest audible frequency 20 KHz can be selected. The filter output moves at an inaudible frequency and therefore there is no audible noise generated even due to vibration, feedback, etc. It is also possible to make the charge pump circuit and other steps for shielding against interference and steps for giving resistance to vibration superfluous without adopting the loop filter switching system, therefore a reduction of size and a lowering of cost can be realized.
    • 无线麦克风使用采用PLL系统的UHF频带载波FM发射机,其具有电压控制晶体振荡型调制器(VCXO),用于通过声学的调制信号AF的输入对晶体振荡电路的振荡频率执行FM调制 信号,并且使用从VCXO获得的FM调制信号fr作为参考信号Vr输入到PLL电路60的模拟相位比较器(PC).PCC以高速(10MHz或 更多),因此环路滤波器(62)的截止频率可以是约100KHz至1MHz的高频带频率,使得可以选择明显高于最高可听频率20KHz的截止频率。 滤波器输出以不可听见的频率移动,因此即使由于振动,反馈等原因也不会产生可听见的噪声。还可以使电荷泵电路和其他步骤进行屏蔽以防止干扰,并提供抵抗振动的步骤多余 不采用环路滤波器切换系统,因此可以实现尺寸的减小和成本的降低。
    • 10. 发明公开
    • Wireless microphone apparatus and transmitter device for wireless microphone
    • Drahtloser Mikrofon und Senderfürdrahtlosen Mikrofon
    • EP1113582A2
    • 2001-07-04
    • EP00309595.7
    • 2000-10-31
    • Circuit Design Inc.
    • Koike, Yukinaga
    • H04B1/04H04R25/00
    • H04B1/04H04R2420/07
    • The present invention provides a compact and lightweight wireless microphone (31, 21) wherein the transmitter device for wireless microphone comprises connector means (40) for making connection to a microphone (31) from which a voice signal is received, low-frequency amplification means (41) for amplifying the voice signal, surface acoustic wave oscillation means (46) for outputting a high-frequency oscillation signal, modulation means (45) for performing frequency modulation of the high-frequency oscillation signal by the amplified voice signal, high-frequency amplification means (41) for amplifying a high-frequency modulation signal modulated, antenna means for radiating a high-frequency output signal amplified by radio waves, and power source means (49, 50) for supplying electric power of a predetermined voltage.
    • 本发明提供一种紧凑且重量轻的无线麦克风(31,21),其中用于无线麦克风的发射机装置包括用于连接到接收语音信号的麦克风(31)的连接器装置(40),低频放大装置 (41),用于放大语音信号,用于输出高频振荡信号的表面声波振荡装置(46),用于通过放大的语音信号对高频振荡信号进行频率调制的调制装置(45) 用于放大高频调制信号调制的高频放大装置(41),用于辐射由无线电波放大的高频输出信号的天线装置;以及用于提供预定电压的电力的电源装置(49,50)。