Permanent Magnet Failure Temperature Measurement via Laser Heating
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Solution Overview
Problem
Current methods for measuring the failure temperature of permanent magnet materials, especially large magnets, are inefficient and unsafe, as they require lengthy processes and cannot be performed on-site, posing risks due to the inability to quickly assess magnet performance variations in mass production.
Innovation Solution
A rapid measuring device integrating laser heating, infrared thermal imaging, and surface magnetic field measurement using a vacuum Hall probe, allowing for accurate and efficient determination of failure temperature by monitoring temperature and magnetic field changes in real-time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional BH tester or VSM devices are used to measure failure temperature, then measurement accuracy can be maintained, but measurement time becomes excessively long and large magnets cannot be measured
Solution Approach 1:
The patent replaces traditional mechanical measurement systems (BH tester, VSM) with a non-contact optical measurement system consisting of laser heating device, infrared thermal imager, and vacuum Hall probe. This substitution enables rapid scanning and measurement of large magnets without physical contact, reducing measurement time from hours to minutes while maintaining measurement accuracy through precise optical detection of magnetic field changes and temperature distribution.
Solution Approach 2:
The patent introduces spatial dimensionality by using infrared thermal imaging to capture two-dimensional temperature distribution across the magnet surface simultaneously, rather than measuring at single points sequentially. The vacuum Hall probe scans the magnetic field in multiple spatial positions, enabling comprehensive measurement of large magnets in a single testing session, thus dramatically reducing measurement time.
2Volume of stationary object
If traditional measurement devices are used, then small pieces or powders can be measured, but large magnets in motors cannot be measured
Solution Approach 1:
The patent creates a universal measurement system that can handle magnets of any size by using non-contact optical methods. The infrared thermal imager captures the entire magnet surface regardless of dimensions, and the vacuum Hall probe can scan magnets from small samples to large motor magnets. This multi-functional system eliminates the size limitation of traditional devices, making the same equipment applicable to both small research samples and large industrial magnets.
Solution Approach 2:
By replacing mechanical contact-based measurement systems with optical fields (laser, infrared), the system removes physical size constraints. The optical methods can penetrate and detect properties across large volumes without physical contact, enabling measurement of entire large magnets including those in motors, whereas traditional mechanical systems could only measure small samples.
3Productivity
If mass production magnets are produced with varying performance, then quantity increases, but traditional measurement cannot assess each magnet, causing safety risks
Solution Approach 1:
The patent enables continuous measurement of magnets in production lines through rapid non-contact testing. The laser heating and infrared detection can operate continuously without interruption, measuring each magnet as it passes through the testing station. This continuous measurement capability ensures every magnet is assessed for quality and safety without slowing down production, maintaining both high productivity and reliability.
Solution Approach 2:
The rapid optical measurement system reduces testing time from hours to minutes per magnet, enabling throughput that matches mass production rates. This speed increase allows comprehensive quality control of every magnet in large quantities, ensuring safety and reliability without compromising productivity.
4Ease of operation
If on-site measurement is required, then rapid assessment is needed, but no existing device can perform quick measurement
Solution Approach 1:
The patent replaces complex mechanical measurement equipment with portable optical devices (laser pointer, infrared camera, Hall probe) that can be easily transported and set up on-site. These optical instruments provide rapid measurement within minutes without requiring laboratory conditions or complex sample preparation, enabling quick field assessment of magnet performance while maintaining measurement accuracy.
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
This solution significantly reduces measurement time, enhances accuracy, and ensures safety by enabling quick on-site assessment of permanent magnet failure temperatures, improving quality control in mass production and extending applicability to various fields.
Implementation Method 1
a laser heating device configured to accurately control laser output energy for locally and accurately heating the permanent magnet sample
Implementation Method 2
an infrared thermal imager configured to monitor and record temperature changes of a permanent magnet sample in real time
Implementation Method 3
a vacuum Hall probe configured to accurately measure magnetic field changes of the permanent magnet sample during heating
Data Source
AI summary
The present disclosure discloses a rapid measuring device and a measuring method for permanent magnet failure temperature. The device includes a measurement system (1), an infrared thermal imager (2), a vacuum Hall probe (3) and a laser heating device (4). A permanent magnet (5) is used as a sample. These components work together to achieve rapid and accurate measurement of the failure temperature of the permanent magnet sample (5). The present disclosure uses light heating, infrared thermal imaging and surface magnetic field measurement. The heating speed is fast, the temperature measurement is accurate, and the failure temperature measurement of large permanent magnet materials can be achieved.