地震计线性误差精确测试

利用同步测试标准地震数据采集器标定电流的地震计线性误差测试方法，避免了标定信号输出电流波动对地震计线性误差测试的影响，按DB/T 21—2007规定的方法进行数据处理，并判定结果是否符合DB/T 22—2007的要求。实际测试表明，该方法测试精度可以达到0.000 5%，满足测试线性偏差小于0.01%的需要，且操作简单，无额外设备要求，可行性高，可在固定地震台站、野外等条件下使用，具有较大的应用价值。

Precise determination of linearity error for seismometer

In this paper, a method for precise determination of linearity error of a seismometer with a standard seismic digitizer is proposed. The calibration current and the output of the seismometer are measured synchronously in this method, so the influence of current fluctuation of the calibration signal will be avoided. The data procession and conclusion are gotten according to DB/T 21-2007 to know if they are satisfied with regulation in DB/T 22-2007. This method is an implementation of the method for measurement of linearity error given in DB/T 22-2007. The tests show that the precision of the method can be as high as 0.000 5%, this meets the requirement of DB/T 22-2007 for the precision of 0.01%. The test will be operated easily with this method, no extra instruments are needed. This method is highly reliable, and may be used at a seismic station, even at a wild field temporary station.