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A self-adaptive adjustment method of transmission power of induction logging tool

A self-adaptive adjustment and induction logging technology, which is applied in the directions of measurement, earthwork drilling and production, borehole/well components, etc., to achieve the effect of simple circuit design and optimized circuit structure

Active Publication Date: 2021-06-08
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to propose a self-adaptive adjustment method for the transmission power of the induction logging tool in view of the deficiencies in the self-adaptive setting of the transmission power of the traditional logging tool

Method used

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  • A self-adaptive adjustment method of transmission power of induction logging tool
  • A self-adaptive adjustment method of transmission power of induction logging tool
  • A self-adaptive adjustment method of transmission power of induction logging tool

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Embodiment 1

[0045] An embodiment of the present invention provides an adaptive adjustment device for the transmission power of an induction logging tool, such as figure 1 As shown, it includes an 8-bit parallel port AD analog-to-digital converter 1 , a first subtractor 2 , a second adder-subtractor 3 , a control word status latch 4 , an analog switch resistor network 5 and a DDS digital frequency synthesizer 6 .

[0046] The input terminal of the first subtractor 2 inputs 8 ideal value signals and the 8 measured value signals produced by the 8-bit parallel port AD analog-to-digital converter 1 respectively, and its output terminal is connected with the input terminal of the second adder-subtractor 3; The output end of the second adder-subtractor 3 is connected with the input end of the control word state latch 4; the output end of the control word state latch 4 is respectively connected with the second adder-subtractor 3 and the analog switch resistance network 5, And its control port con...

Embodiment 2

[0098] An embodiment of the present invention provides a method for adaptively adjusting the transmission power of an induction logging tool, such as Figure 9 As shown, the following steps S1-S10 are included:

[0099] S1. Conditioning, amplifying and filtering the signal output from the receiving coil of the induction logging tool, collecting the conditioning, amplified and filtered measurement signal through an 8-bit parallel port AD analog-to-digital converter, and converting it into an 8-bit measured value signal and inputting it into the first subtraction device.

[0100] The conditioning, amplifying and filtering circuit for conditioning, amplifying and filtering the output signal of the receiving coil is provided by the induction logging instrument itself. In the embodiment of the present invention, only the measurement signal needs to be introduced.

[0101] S2. In the first subtractor, the set 8-bit ideal value signal is used as the minuend, and the 8-bit measuremen...

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Abstract

The invention discloses a method for self-adaptive adjustment of transmission power of an induction well logging instrument, which realizes automatic adjustment entirely through hardware circuits without configuring software or burning programs. The invention automatically calculates and adjusts the transmission power according to the signal size collected by the AD analog-to-digital converter, so as to ensure that the signal size finally received by the induction logging tool is always in the best state, so that the received signal will not be too large and saturated, and will not be too small As a result, the measurement accuracy is not enough, and finally the power consumption of some systems is reduced, the artificial setting error is reduced, and the measurement accuracy and measurement efficiency are improved. At the same time, because the present invention adopts the design of the whole hardware circuit for adjustment, it does not need the participation of program software, and greatly improves the reliability of the system.

Description

technical field [0001] The invention belongs to the technical field of transmission power automatic control, and in particular relates to the design of a self-adaptive adjustment method for the transmission power of an induction logging tool. Background technique [0002] With the rapid development of induction logging technology, most of the instrument systems in the field of well logging currently configure the transmission power artificially through the host computer interface in advance, or realize the transmission power by manually calculating the setting parameters many times during the measurement process. Configuration. After setting the transmission power, the instrument always measures according to the fixed transmission power, which inevitably has some disadvantages. If the transmission power is set too high in advance, there will be waste of transmission power, increased power consumption, low efficiency, and also It may cause the receiving circuit signal to be ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B47/00E21B47/12
CPCE21B47/00E21B47/12
Inventor 管国云聂在平孙向阳
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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