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介绍比较法振动传感器幅相特性测量技术的基本原理和传统实现方法。详细描述了一种新型的基于虚拟仪器技术的比较法相位型振动校准系统,它将绝对法振动校准中正弦逼近的算法运用于比较法,通过对参考传感器和被校传感器两路信号的采集和处理,能够在宽频带范围内实现加速度传感器复合灵敏度的精确校准,在小相位差的测量上实现了与相位标准同等级的精确测量。运用虚拟仪器技术,还能够实现信号频谱分析及失真度的精确计算。
This paper introduces the basic principle and the traditional method of measuring the amplitude and phase characteristics of the vibration sensor. A new phase-based vibration calibration system based on virtual instrument technology is introduced in detail. It applies the sinusoidal approximation algorithm in absolute method to the comparison method. Through the acquisition of two signals of the reference sensor and the sensor being calibrated, Processing, accurate calibration of acceleration sensor compound sensitivity over a wide frequency band, and accurate measurement of the same level as the phase standard in the measurement of small phase difference. The use of virtual instrument technology, but also to achieve signal spectrum analysis and accurate distortion calculation.