一前言在由拾振传感器、放大继电控制停车仪、停车报警器等组成的接触疲劳试验的自动控制停车系统中,拾振传感器是核心部分。因为它与被控试验机直接接触,它能不能真实地把被测控的试验机的振动变化情况,按恒定的关系将电讯号输给控制仪器,在很大程度上决定着控制效果的好坏。拾振传感器的性能,主要取决于合理的设计和压电晶体的选择。在接触疲劳试验过程中,要得到准确、可靠的试验数据,凭经验探测是无法胜任的,而且劳动强度较大。为了改变此 A foreword The pickup sensor is the core part in the automatic control parking system of contact fatigue test consisting of pick-up sensor, amplified relay control parking meter and parking alarm. Because it is in direct contact with the controlled testing machine, can it really put the testing machine under test vibration changes, in a constant relationship will lose the signal to the control equipment, to a large extent determine the control effect is good or bad . Pickup vibration sensor performance, mainly depends on the rational design and piezoelectric crystal selection. In the contact fatigue test process, to get accurate and reliable test data, based on empirical exploration is incompetent, and labor-intensive. In order to change this