为了解决地震计正弦标定应用中存在的问题，引入了叠加正弦标定方法。当采用此方法测试地震计时，响应信号是连续的，而且瞬态响应仅在整个响应信号的开始部分出现，几乎整个响应信号都能被用来分析；在进行数据处理时，只需避开整个响应信号开始部分的瞬态响应，容易用软件实现数据自动处理。本文介绍了叠加正弦标定的基本原理、实验步骤、数据处理方法以及采用此方法对地震计进行测试的实验。实验发现此方法测试的相对误差小于1%。

Electrical calibration can be used to get the amplitude response of the seismometer. Among seismometers used in China, the most widely used electrical calibration method is sine calibration. But sine calibration has two problems in application：only part of the response signal can be used for analysis and it is not easy to implement the function of automatic data processing with the software. In order to solve the problems above，we introduce a new calibration method called overlapped sine calibration. In the test of the seismometer with this method，the response signal is continuous，and the transient response is only at the beginning of the whole response signal. Thus almost the entire response signal can be used to analyze. When processing the data, we only need to avoid the transient response at the beginning of the whole response signal. Therefore，it is easy to implement the function of automatic data processing with the software. This paper introduces the basic theory，the experimental procedure and the data processing method of the overlapped sine calibration. We also introduce an experiment using this method to test the seismometer. From the experiment，we find that the relative error of this method is less than 1%.

国家科技支撑项目课题“强震宽频带地震计研制”(2012BAF14B12-02)和国家科技支撑项目课题“低噪声超宽频带地震计研制”(2012BAF14B12-01)联合资助