Abstract：Seismic signals are excited by a controlling vibration system for sweeping signals in vibroseis seismic exploration. It is very common that there exists distortion between swept signals and output signals. For the technology for vibrator distortion correction, the hardware solution is realized by real-time control of a servo valve to obtain the correction amount through nonlinear quadratic fitting of hammer signals and plate signals, so as to improve response accuracy and reduce distortion. The software solution is realized by using the difference fitting between plate signals and hammer signals. This paper introduces a method to calibrate swept signals with the difference between force signals and preset swept signals in harmonic domain. The difference function is directly obtained by analyzing the harmonic component of the force signals and the preset swept signals. The harmonic interference is harmonic, so the algorithm reflects the changes caused by harmonic distortions more directly. It is realized by software correction,and it is convenient and fast, and has a good initial application effect.
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