A device for measuring the direction sensitivity of a geophone to receive elastic waves

Abstract

The invention discloses a device for measuring sensitivity of a wave detector in a reception direction of elastic waves. The device comprises a water tank filled with water, wherein a shock absorption material is stuck at the inner side of the wall of the water tank; a support device is arranged on the water tank; rotating shafts at two ends of the support device are respectively connected with corresponding walls of the water tank; a universal joint is arranged at the middle position of the support device; a wave detector is arranged in the universal joint; the universal joint is connected with a counter weight through a connecting rod I; an electric spark emission probe is arranged at the position of the central line of the support device which is located at the upper side of the support device and below a water body; and a dial is arranged at the outside of the wall of the water tank. Due to the universal joint and the counter weight in the invention, a receiving surface of the wave detector is guaranteed to always keep horizontal when the rotating shafts are rotated for different angles; as the water tank and the support device are coated by rubber, the problem of reflected waves is solved; a lower cross rod is protruded out towards the electric spark emission probe to reduce interference from the reflected waves of the rod to the wave detector. The device for measuring sensitivity of the wave detector in the reception direction of elastic waves, disclosed by the invention, has an advantage of measuring sensitivity of the wave detector in the reception direction of elastic waves.

Description

technical field [0001] The invention relates to a device for receiving directivity, in particular to a device for measuring the direction sensitivity of a wave detector for receiving elastic waves. Background technique [0002] The geophone is a sensing element that receives elastic waves during elastic wave detection, also known as a vibration pickup, and is called a probe in the field of acoustic wave measurement. The directional characteristic refers to the response of the geophone to different directions, which is expressed by sensitivity. When detecting direction sensitivity, it is usually measured by the magnitude of the amplitude measured by the geophone for the same energy source and detector. The directional sensitivity measurement of the geophone lacks effective means and special devices. At present, the measurement of the characteristic curve of the geophone response uses a vibration table, the geophone is fixed on the vibration table, and the vibration frequency ...

AI Technical Summary

Problems solved by technology

So far, there have been no reports on the method of measuring the response sensitivity of the geophone to different directions and related devices

Images