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A self-adaptive adjustment device for power amplifier of well logging instrument

A technology of self-adaptive adjustment and logging instrument, applied in the direction of instrument, electric variable adjustment, control/regulation system, etc., can solve problems such as unfavorable power amplifier circuit and system stability, temperature rise, etc., so as to increase hardware difficulty and reduce power supply Loss, the effect of reducing system power consumption

Active Publication Date: 2018-06-15
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since logging instruments generally work in harsh high-temperature environments, after the electrical energy is converted into heat, the temperature will rise accordingly, which is extremely unfavorable to the stability of the power amplifier circuit and the system itself

Method used

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  • A self-adaptive adjustment device for power amplifier of well logging instrument
  • A self-adaptive adjustment device for power amplifier of well logging instrument
  • A self-adaptive adjustment device for power amplifier of well logging instrument

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Embodiment 1

[0035] The embodiment of the present invention provides a self-adaptive adjustment device for the power amplifier power supply of the logging instrument, such as figure 2 shown, including:

[0036] General power supply 1, used to provide power input for the entire adjustment device.

[0037] The first MOS transistor combination switch 2 controls whether the main power supply 1 provides power input for the switching power supply 9 by turning on / off.

[0038] The second MOS tube combination switch 3 controls whether the main power supply 1 directly provides power input for the power amplifier 10 of the logging tool by turning on / off.

[0039] The RMS amplitude detector 4 is used to detect the effective value of the amplitude of the signal transmitted by the logging tool, and convert the transmitted signal from the effective value signal of the amplitude into a DC voltage signal.

[0040] The low-pass filter 5 is used for filtering and rectifying the DC voltage signal.

[004...

Embodiment 2

[0055] The embodiment of the present invention provides a method for self-adaptive adjustment of the power amplifier power supply of the logging instrument, such as Image 6 shown, including the following steps:

[0056] S1. Detect the effective value of the amplitude of the signal transmitted by the logging tool, and convert the transmitted signal from the effective value signal of the amplitude into a DC voltage signal.

[0057] S2. Perform analog-to-digital conversion on the filtered and rectified DC voltage signal, convert the DC voltage signal into an 8-bit binary digital signal H1, and output it to 8 parallel IO ports.

[0058] S3. Perform a NAND operation on the highest two bits of the digital signal H1. If the operation result is low level, proceed to step S4, otherwise proceed to step S5.

[0059] S4. Control the second MOS tube combination switch to be turned on, and the first MOS tube combination switch to be turned off, the main power supply provides power input f...

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Abstract

The invention discloses an adaptive adjustment device for the power amplifier power supply of a well logging instrument. By detecting the magnitude of the transmitted signal amplitude in real time, the effective value of the transmitted signal amplitude is converted into a DC voltage, and then an 8-bit parallel-port ADC sampling module performs sampling and analog-to-digital conversion. Finally, the parallel port output is realized, and the analog quantity of the transmitted signal amplitude is converted into an 8-bit binary digital quantity, which is reflected on the output voltage value of the switching power supply. Through reasonable circuit parameter matching, the non-linear error of switching power supply and power amplifier output is eliminated, so that the change of the transmitted signal is linearly proportional to the input voltage of the power amplifier, that is, the output voltage of the switching power supply, and the power amplifier always works in a state close to full load output. It reduces the heat loss of the power supply, improves the efficiency of the power amplifier, and reduces the power consumption of the system. At the same time, the present invention can automatically select whether the power amplifier is powered by the switching power supply or by the total system power supply according to the size of the transmitted signal.

Description

technical field [0001] The invention belongs to the technical field of power amplifier energy saving and consumption reduction, and in particular relates to the design of an adaptive adjustment device for a power amplifier power supply of a well logging instrument. Background technique [0002] At present, the power amplifier types of logging tools usually include Class A, Class B, Class AB, Class D, etc. Different types of power amplifiers have different advantages and disadvantages, and various power amplifiers have different related applications. Among them, class A power amplifier has the lowest efficiency, but has good linearity and simple design; class B power amplifier has higher efficiency than class A, but has more serious crossover distortion and poor linearity; class AB is between the two, and its efficiency is in the middle. The linearity is better than Class B; Class D power amplifier has the highest efficiency and good linearity, but due to device limitations (...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05F1/56
CPCG05F1/561
Inventor 管国云聂在平孙向阳
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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