科研之友
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摘要
In view of the difficulties in the construction and data acquisition of seismic mciro-VSP uphole instruments, several improved methods are proposed to improve the quality of data acquisition and the function of the instrument. The digital geophone is designed by employing MEMS acceleration sensor combined with multi-channel parallel processing, and the integrated gesture detection technology is used to realize the calibration function of the horizontal Component data directly, so as to ensure the data calibration quality of the system. An automatic control technology of distributed bus based on Ethernet-RS485 is proposed, which can realize the random combination of the probe at all levels. Meanwhile, the electric mode is used to control the operation of the probe in order to improve the degree of integration of the system. In this paper, the method of using the gesture detection technology to realize the calibration of horizontal component data is discussed in detail. The determination of the random combination control and the vibrator shot orientation is also addressed in this work. The single probe supports three components parallel acquisition with effective resolution of 18 bits. The parameters can be remotely configured, with fast display of probe gesture and support of remote control function, which is suitable for engineering exploration under the complex environment. The whole system can realize the full digital operation and only need four core cables to interconnect, thus reducing the volume and weight of the equipment, and reducing the complexity of the wiring.
