振动与冲击传感器的校准方法 第11部分:激光干涉法作主要的振动校准

[中文适用范围]： 本部分规定了绝对法校准直线加速度计(带放大器或不带放大器)的仪器设备和操作程序，以及采 用稳态正弦振动和激光干涉测量法获得加速度计复灵敏度的幅值和相移的方法。 本部分适用的频率范围为1 Hz～10 kHz，动态范围(幅值)为0．1 m／s～1 000 m／s(依频率 而定)。 本部分第3章规定的测量不确定度覆盖了上述范围。若校准频率低于1 Hz(如：其他国际标准中 的参考频率为0．4 Hz)和加速度幅值小于0．1 m／s(如：1 Hz时为0．004 m／s)，可选用一个合适的低 频振动台，并采用本部分中规定的方法3。 方法l(条纹计数法)适川于频率范围为1 Hz一800 Hz的灵敏度幅值校准。特殊条件下，可用于较 高频率段(见第8章)。方法2(最小点法)适用于频率范围为800 Hz～10 kHz的灵敏度幅值校准(见第 9章)。方法3(正弦逼近法)适用于频率范围为1 Hz一10 kHz的灵敏度幅值和相移的校准(见 第10章)。 方法1及方法3规定在不同频率点、固定的加速度幅值下进行校准。方法2则要求在固定的位移 幅值进行校准(其加速度幅值随频率变化)。 [外文原描述]： This part of ISO 16063 specifies the instrumentation and procedure to be used for primary vibration calibration of rectilinear accelerometers (with or without amplifier) to obtain magnitude and phase lag of the complex sensitivity by steady-state sinusoidal vibration and laser interferometry. It is applicable to a frequency range from 1 Hz to 10 kHz and a dynamic range (amplitude) from 0,1 m/s2 to 1 000 m/s2 (frequency-dependent). These ranges are covered with the uncertainty of measurement specified in clause 2. Calibration frequencies lower than 1 Hz (e.g. 0,4 Hz, which is a reference frequency used in other International Standards) and acceleration amplitudes smaller than 0,1 m/s2 (e.g. 0,004 m/s2 at 1 Hz) can be achieved using Method 3 specified in this part of ISO 16063, in conjunction with an appropriate low-frequency vibration generator. Method 1 (fringe-counting method) is applicable to sensitivity magnitude calibration in the frequency range 1 Hz to 800 Hz and, under special conditions, at higher frequencies (cf. clause 7). Method 2 (minimum-point method) can be used for sensitivity magnitude calibration in the frequency range 800 Hz to 10 kHz (cf. clause 8). Method 3 (sine-approximation method) can be used for magnitude of sensitivity and phase calibration in the frequency range 1 Hz to 10 kHz (cf. clause 9). Methods 1 and 3 provide for calibrations at fixed acceleration amplitudes at various frequencies. Method 2 requires calibrations at fixed displacement amplitudes (acceleration amplitude varies with frequency).