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    • 29. 发明授权
    • Device for measuring the average value of pulse signals
    • 用于测量脉冲信号平均值的装置
    • US5416798A
    • 1995-05-16
    • US965272
    • 1993-08-20
    • Masaaki HiroseKazuo KatohYutaka UekiYohei HirakosoMitsunori SatohTakashi Kosuge
    • Masaaki HiroseKazuo KatohYutaka UekiYohei HirakosoMitsunori SatohTakashi Kosuge
    • G01R19/00G01R29/08G01R29/26H04B3/46H04B17/00
    • G01R19/003G01R29/0892G01R29/26
    • The device of the present invention is used to measure the intensity of a disturbing wave and measures an average value of impulsive noise. The invention permits accurate and short-time measurements. Impulsive noise, which is input via a variable attenuator, a frequency converter, an intermediate-frequency amplifier and a band-pass filter of a 9 or 120 kHz pass frequency, is provided to a linear detector. The detected output is applied to a low-pass filter which is composed of CR elements and whose cut-off frequency is tens of kilohertz. By the low-pass filter, the peak value of the detected output is lowered and its width is increased. The filter output is converted by an A-D converter to a digital signal. Digital values at respective sample points in the digital signal of one frame are added by an arithmetic circuit, and the added value is divided by the number of samples to obtain an average value, which is displayed.
    • PCT No.PCT / JP92 / 00677 Sec。 371日期:1993年8月20日 102(e)日期1993年8月20日PCT提交1992年5月26日PCT公布。 第WO92 / 21984号公报 日本1992年12月10日。本发明的装置用于测量干扰波的强度并测量脉冲噪声的平均值。 本发明允许精确和短时间的测量。 通过可变衰减器,频率转换器,中频放大器和9或120kHz通过频率的带通滤波器输入的脉冲噪声被提供给线性检测器。 检测到的输出被施加到由CR元件组成并且截止频率为几十赫兹的低通滤波器。 通过低通滤波器,检测输出的峰值降低,其宽度增加。 滤波器输出由A-D转换器转换为数字信号。 通过算术电路将一帧的数字信号中的各采样点的数字值相加,并将该相加值除以采样数,得到显示的平均值。