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在冲击脉冲峰值测量中,常用这样的测量系统:在加速度计和电荷放大器后直接连以振子作为记录装置(图1)。为了满足脉冲高频分量要求,记录往往选用高频振子。如FC-5000或FC-10000。它们的工作频率范围和允许电流都较大,但电流灵敏度较低。使用时一旦忽视匹配问题,就会给脉冲波形幅值测量带来显著的方法误差。在冲击台调试中,曾多次遇见这样的情况:用2626电荷放大器,后接FC-5000振子,或DHF-3电荷放大器配以FC-10,000振子,测量冲击峰值。为使记录波形清晰,将脉冲峰
In the shock pulse peak measurement, commonly used measurement system: the accelerometer and charge amplifier directly connected to the vibrator as a recording device (Figure 1). In order to meet the requirements of high-frequency pulse, recording often use high-frequency oscillator. Such as FC-5000 or FC-10000. Their operating frequency range and allowable current are large, but the current sensitivity is low. Ignoring the matching problem when using it can introduce significant methodological errors in pulse waveform amplitude measurements. In impact table setups, there have been times when the impact peak was measured using a 2626 charge amplifier followed by a FC-5000 oscillator or a DHF-3 charge amplifier with a FC-10,000 oscillator. To make the recording waveform clear, the pulse peak will be