Vibroseis counterforce real-time adjusting system and adjusting method thereof

Abstract

The invention belongs to the technical field of seismic source generators and relates to a vibroseis counterforce real-time adjusting system and an adjusting method thereof. The vibroseis counterforcereal-time adjusting system comprises a seismic source servo mechanism and a seismic source counterforce mechanism which is used for providing counterforce for the seismic source servo mechanism; theseismic source servo mechanism comprises a shock excitation plate; the seismic source counterforce mechanism comprises an air spring fixedly connected to the upper portion of the shock excitation plate, a pressing plate connected to the upper end of the air spring and a seismic source counterforce oil cylinder connected to the upper portion of the pressing plate; and an electric control overflow valve is installed on the oil inlet pipe of the seismic source counterforce oil cylinder. Oil pressure in the oil inlet pipe is controlled through the electric control overflow valve; an acting force applied to the pressing plate by the seismic source counterforce oil cylinder is equal to the product of the oil pressure and the sectional area of the cylinder body of the seismic source counterforceoil cylinder, so that the acting force applied to the pressing plate can be changed by changing the oil pressure, and therefore, the seismic source counterforce oil cylinder can provide counterforcesof different magnitudes to adapt to shock excitation forces of different magnitudes.

Description

technical field [0001] The invention relates to the technical field of seismic source generators, in particular to a real-time adjustment system and an adjustment method for a vibrator reaction force. Background technique [0002] The use of vibrator to artificially excite seismic waves is an important method for seismic exploration. Vibrator has super anti-interference ability. Since large-scale vibroseis and other vehicle-mounted vibrators cannot enter complex surface areas such as islands and jungles, according to actual application needs And a remote control self-propelled vibrator developed, because of the small size of the car body, small turning radius, and flexible maneuverability, it is very suitable for islands and jungle operations. Safety. [0003] In the existing seismic source generator, a total of four reversible legs are arranged at the front and rear ends of the vehicle frame. When the source of vibration needs to be generated, the four outriggers are rota...

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Problems solved by technology

[0004] The above-mentioned existing technical solutions have the following defects: in this technical solution, the lifting cylinder exerts downward pressure to provide a reaction force for the seismic source servo mechanism, so that the seismic source servo mechanism will not be unable to reach the vibration source due to upward recoil during the vibration process. the goal of

However, in actual use, according to different geological conditions, the vibration source servo mechanism will be selected to generate different excitation forces. When the reaction force provided by the lifting cylinder is much greater than the excitation force, the vibration source will not be generated.

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