Adaptive load impedance detection system and method

An adaptive load and impedance detection technology, applied in the measurement of resistance/reactance/impedance, measurement device, measurement of electrical variables, etc., can solve problems such as difficulty in implementation, small input signal strength range, etc., to achieve the effect of impedance matching

Active Publication Date: 2019-06-07
FUJIAN JIANGXIA UNIV
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  • Abstract
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Problems solved by technology

This technology needs to use a reflectometer circuit to obtain the incident signal and reflected signal, and the reflectometer circuit can only achieve high-frequency narrow-band characteristics, especially difficult to achieve in low-frequency bands
At the same time, the internal structure of the AD8302 used in this technology is as follows Image 6 As shown, because no gain negative feedback technology is used, the allowable range of input signal strength is small

Method used

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  • Adaptive load impedance detection system and method
  • Adaptive load impedance detection system and method
  • Adaptive load impedance detection system and method

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Embodiment Construction

[0022] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0023] It should be pointed out that the following detailed description is exemplary and is intended to provide further explanation to the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0024] It should be noted that the terminology used here is only used to describe specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and / or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and / or combi...

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Abstract

The invention relates to an adaptive load impedance detection system and method. The system comprises an input terminal SPO, an input terminal SI1, an input terminal SI2, an output terminal SNO, an output terminal So1, an output terminal So2, a current-to-voltage conversion unit ICV, a first variable gain amplifier VA1, a second variable gain amplifier VA2, a first amplitude-to-voltage conversionunit AD1, a second amplitude-to-voltage conversion unit AD2, a comparison control unit CCU, a phase discriminator PHD and an output calculation unit OCU. The system provided by the invention can adaptively adjust a circuit state to adapt to different input signal strengths without using a radio frequency direction finder and has the advantages of the simple circuit structure, easy implementation and accurate detection.

Description

technical field [0001] The invention relates to the field of load impedance detection, in particular to an adaptive load impedance detection system and method. Background technique [0002] How to robustly and adaptively detect the load state of the circuit system is an important link in the field of radio frequency technology. Currently disclosed technologies lack a load impedance detection method that can achieve low cost, wide frequency spectrum, and wide input intensity range. [0003] The techniques proposed in the reference "Impedance Measurement and Characteristic Analysis of Narrowband Low-Voltage Power Line Channels" (Electronic Measurement Technology, Volume 35, Issue 3, 2013) are as follows: image 3 and Figure 4 shown. It is an impedance measurement technique based on the FRA impedance measurement adapter. This technology needs to provide the input sinusoidal signal, and uses the quadrature local oscillator frequency mixing method to realize the measurement o...

Claims

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Application Information

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IPC IPC(8): G01R27/02
Inventor 张利红
Owner FUJIAN JIANGXIA UNIV
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