Large-travel zero-adjustment system for broadband seismometer

Abstract

The invention discloses a large-stroke zero setting system of a wide-frequency-band seismometer. The large-stroke zero setting system comprises a zero position detection and control circuit, a power unit and a transmission mechanism, wherein a swing body of the seismometer is in pivot joint with a frame, the zero position detection and control circuit comprises a capacitor displacement detection unit for detecting a zero position state of the seismometer, the signal output end of the zero position detection and control circuit is connected with the control end of the power unit, and the output end of the power unit is connected with the swing body through the transmission mechanism. When the capacitor displacement detection unit detects that the seismometer is in a non-zero-position state, zero setting is conducted on the seismometer through adjustment. The large-stroke zero setting system adopts an overall posture adjustment mode, drives the transmission mechanism to adjust the position of the swing body through the power unit, achieve zero setting of the seismometer through adjustment, widens a zero position adjustment range, improves the working environment adaptability of the seismometer and reduces the instrument installing difficulty.

Description

technical field [0001] The invention relates to a zero-setting mechanism of a seismometer, in particular to a large-stroke zero-setting system of a broadband seismometer. Background technique [0002] Seismometer is a commonly used instrument in the field of earthquake observation. It mainly includes seismometers in three directions: east-west, north-south, and vertical, and a circuit structure for converting ground motion into electrical signals, which can detect ground vibration signals. . [0003] Before the seismometer works, it needs to be zeroed to make it in normal working condition. The traditional zero-adjustment method of existing seismometers is to manually adjust the bottom corner screw of the seismometer casing to adjust the level bubble to a centered position, and then fine-tune the center of mass position of the counterweight or the tension of the leaf spring to adjust the seismometer. to zero. This method of zero adjustment has a small adjustable range (ab...

AI Technical Summary

Problems solved by technology

This method of zero adjustment has a small adjustable range (about 0.1 degrees), so it has strict requirements on the working environment of the seismometer and is difficult to install. It is difficult for the station staff to install and debug the seismometer.

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