Borehole clinometer probe

Abstract

The invention discloses a declinator probe for boring, which includes a bushing and two joints connected at the two ends of the bushing by screw thread. The probe is characterized in that the upper and lower ends in the bushing are respectively provided with a fixing frame and a measuring frame. The fixing frame is provided with an input-output interface, a power supply, a control circuit and a stepper motor. The measuring frame is provided with an obliquity sensor and an orientation sensor; the two ends of the measuring frame are provided with rotary shafts; one joint is provided with a bearing seat; the fixing frame is fixedly connected with the inner wall of the bushing; one end of the measuring frame is supported on the bearing seat by the rotary shaft; the rotary shaft arranged at the other end is connected with the stepper motor through a shaft joint. The invention has reasonable design and simple structure. The declinator probe adopts the technology of obliquity sensing which avoids the accurate measuring of the orientation and obliquity being affected caused by that an imbalance block is not in place, thus ensuring the precision of measuring with the advantages of convenient debugging and being free from maintenance after installation when the obliquity of boring is smaller than 3 degrees.

Description

technical field [0001] The invention relates to a geological survey instrument, in particular to a drilling inclinometer probe. Background technique [0002] At present, the instruments used for inclinometers in geological boreholes generally use a weighted block inclinometer, which consists of a probe and a ground display. The frame is equipped with a bias weight, an orientation sensor, and an inclination sensor. The upper and lower thimbles can make the frame rotate more sensitively when the probe tube is tilted or the orientation changes. During detection, it slides the probe along the borehole wall to the detection point. When the probe pipe is tilted or its orientation changes, the frame will be deflected to a preset position under the action of the bias weight. At this time, the orientation sensor and Inclination sensors record and transmit measurements of the azimuth and inclination of the borehole. The measurement accuracy of the inclinometer has a great relationsh...

AI Technical Summary

Problems solved by technology

The measurement accuracy of the inclinometer has a great relationship with the setting of the bias weight. When the inclination of the drilling hole is less than or equal to 3°, it will affect the bias weight to deflect the frame to the preset position. At this time, the measured data error will be relatively large. Therefore, the inclination angle of the borehole must be greater than 3° when the existing weight-type inclinometer is used, otherwise the accuracy of the measurement data cannot be guaranteed

In addition, the upper and lower thimbles will increase their rotation resistance due to wear and tear, which will reduce the sensitivity of the frame rotation, and the frame is connected to the power supply and output interface with wires. The contact between the wires and the frame will increase the friction of the frame rotation. If it is shallow, it will affect the output signal, thereby affecting the measurement accuracy of the instrument

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