CT-1地震计传递函数测试仪的设计

DESIGN OF CT-1 TRANSFER FUNCTION TEST SYSTEM OF SEISMOMETER

将计算机控制技术应用到甚宽频带地震计的传递函数测试中。讨论了基本的测试方法和原理 ,阐述了传递函数测试系统的软、硬件设计 ,给出了测试系统的应用实例。该测试系统具有正弦波自动扫频、阶跃信号法和脉冲信号法等标定方法 ,满足了甚宽频带地震计的传递函数测试在观测频带。

After analyzing traditional test methods, this paper describes athe basic principle, especially hardware and software system based on automatic frequency scanning and step or impulse response methods for testing a seismometer under the control of a computer.Using a D/A converter and on A/D converter of high precision,the transfer function test system can automatically test amplitude response, phase response, step or impulse response of a seismometer. It succeeds in testing praclically the transfer function of the Very Broadband Seismograph.