Temperature-Based Phase Compensation Circuit for Magnetic Induction Imaging
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Magnetic induction imaging devices face accuracy issues due to temperature-induced phase differences in the measurement system, affecting the quality of imaging and measurement results.
Innovation Solution
A phase compensation circuit is introduced, comprising a phase difference voltage detection module, a compensation voltage adjustment module, and a compensation module, which processes detection and reference signals to calculate phase differences and compensates for temperature-induced phase errors by adjusting voltage based on ambient temperature parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If the magnetic induction imaging device operates for extended periods, then the measurement system generates heat, but this heat causes temperature changes that introduce additional phase differences and reduce measurement accuracy
Solution Approach 1:
The patent implements a feedback mechanism by continuously monitoring the temperature of the measurement system and using this information to dynamically adjust the phase compensation. The temperature detection module provides real-time temperature data, which is then used by the phase compensation module to correct phase differences, creating a closed-loop control system that maintains measurement accuracy during extended operation.
Solution Approach 2:
The patent changes the parameter being compensated from a fixed value to a temperature-dependent variable. By establishing a correspondence relationship between temperature and phase compensation parameters, the system dynamically adjusts compensation values based on actual temperature conditions, allowing accurate measurements even as temperature changes during operation.
2Measurement precision
If the phase compensation circuit is added to correct temperature-induced phase differences, then measurement accuracy is improved, but the device complexity increases
Solution Approach 1:
The patent introduces a temperature as an intermediary parameter that links the physical condition (heat generation) to the measurement error (phase difference). By measuring temperature and using it as a basis for compensation, the system creates an indirect but effective method for correcting phase errors without directly measuring or controlling the complex electromagnetic phase relationships.
Solution Approach 2:
The patent replaces direct phase measurement and correction mechanisms with a temperature-based compensation approach. Instead of directly measuring and correcting phase differences through complex electromagnetic methods, the system uses temperature sensing and corresponding phase adjustment, substituting a simpler thermal measurement approach for a more complex direct phase control system.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The phase compensation circuit enhances measurement accuracy and improves imaging quality by mitigating temperature-related phase differences, ensuring more reliable results in magnetic induction imaging.
Implementation Method 1
the phase difference voltage detection module is configured to process an inputted detection signal and an inputted reference signal, and calculate a magnitude ratio or a phase difference of the processed detection signal and reference signal
Implementation Method 2
the compensation voltage adjustment module is configured to collect an ambient temperature parameter, determine a first compensation voltage corresponding to the ambient temperature parameter according to a corresponding relationship between a preset temperature parameter and a compensation voltage, perform a voltage division on a voltage value according to the first compensation voltage
Implementation Method 3
the compensation module is configured to compensate for the first phase difference voltage signal according to the compensation voltage signal
Implementation Method 4
a magnetic induction imaging device is mainly used for the detection of brain function... based on a principle of measurement of an eddy current signal: an excitation coil is inputted to an alternating current to generate an alternating magnetic field, a conductor to be tested is placed in the alternating magnetic field, and a magnetic flux passing through the conductor to be tested is changed. The conductor to be tested is regarded as a closed loop circuit, therefore, an induced current, i.e., eddy current, is generated inside the conductor
Data Source
AI summary
A phase compensation circuit includes a phase difference voltage detection module configured to process an inputted detection signal and an inputted reference signal, calculate a magnitude ratio or a phase difference of the processed detection signal and reference signal, and then output a first phase difference voltage signal according to the amplitude ratio or the phase difference. A compensation voltage adjustment module is configured to collect an ambient temperature parameter, determine a first compensation voltage corresponding to the ambient temperature parameter according to a corresponding relationship between a preset temperature parameter and a compensation voltage, perform voltage division on a voltage value inputted from a voltage input terminal according to the first compensation voltage, and output a compensation voltage signal; and a A compensation module is configured to compensate for the first phase difference voltage signal according to the compensation voltage signal and output a second phase difference voltage signal.