Shielded EM Stress Test Chamber for Coupled Reliability Evaluation
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Solution Overview
Problem
There is a lack of a dedicated test apparatus for coupling a complicated electromagnetic and stress environment, necessitating the development of a reliability test apparatus that can simulate both environments to assess the stress performance of electronic devices and materials under realistic conditions.
Innovation Solution
A reliability test apparatus is developed, comprising a shielding compartment with a microwave absorption layer and shielding layer, an electromagnetic simulation system, a stress application system, a data collection system, and a control system, which can simulate and apply electromagnetic and stress conditions independently or together, allowing for comprehensive testing of samples under various conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a climatic chamber is used to change temperature, humidity, pressure, and atmosphere, then the treatment can be carried out under different climatic conditions, but the pressure applied is gas pressure perpendicular to the device surface, resulting in diverse stress directions that do not match real-world single-direction stress conditions
Solution Approach 1:
The stress application system is segmented into independent components: a loading device for applying force, a connecting rod for force transmission, and a sample fixture for securing the tested object. This segmentation allows the stress to be applied in a controlled single direction along the connecting rod axis, resolving the contradiction by enabling precise stress direction control while maintaining climatic testing versatility
Solution Approach 2:
A connecting rod is introduced as an intermediary component between the loading device and the sample fixture. This intermediary transmits the applied force in a controlled manner along its axial direction, ensuring that the stress is applied in a single consistent direction regardless of the climatic conditions inside the chamber, thus resolving the stress direction control issue
2Adaptability or versatility
If a vibrator is installed in the chamber to simulate mechanical vibration, then additional mode stirring can be achieved, but this adds device complexity and does not provide controlled unidirectional stress application
Solution Approach 1:
The vibration simulation function is extracted from the climatic chamber and implemented as a separate, dedicated loading device. This extraction reduces the complexity of the chamber itself while maintaining the capability to simulate vibration and apply controlled stress, as the loading device can be configured independently with appropriate actuators
Solution Approach 2:
The loading device is designed with multi-functionality, capable of providing both static stress application and dynamic vibration simulation through controlled actuation. This universal component serves multiple testing purposes without requiring separate specialized equipment, thereby reducing overall device complexity while maintaining versatility
3Device complexity
If there is no dedicated test apparatus for coupling electromagnetic and stress environment, then existing separate testing methods can be used, but this lacks the capability to assess stress performance under realistic combined electromagnetic and stress conditions
Solution Approach 1:
The electromagnetic simulation system and stress application system are merged into a single integrated testing apparatus. The electromagnetic simulation system generates controlled electromagnetic environments within the chamber, while the stress application system simultaneously applies mechanical stress to the sample. This combination enables reliable stress performance testing under realistic combined electromagnetic and stress conditions that cannot be achieved with separate testing methods
Solution Approach 2:
The integrated apparatus creates a simplified copy of real-world operating conditions where electronic devices experience both electromagnetic environments and mechanical stress simultaneously. By replicating these combined conditions in a controlled laboratory setting, the system enables accurate assessment of device reliability without requiring actual field testing
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 apparatus provides a rapid, reliable, and stable test environment for evaluating the electromagnetic reliability of electronic devices and materials, enhancing test accuracy and flexibility, and promoting the electromagnetic environment simulation technology in material reliability testing.
Implementation Method 1
an inner side of the shielding compartment is provided with a microwave absorption layer and a shielding layer
Implementation Method 2
an inner side of the shielding compartment is provided with a microwave absorption layer and a shielding layer
Data Source
Figure 1
Figure 2
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AI summary
A reliability test apparatus coupling an electromagnetic environment and a stress environment comprises a shielding compartment (2), an electromagnetic simulation system, a stress application system, a data collection system, and a control system, wherein the electromagnetic simulation system is used for emitting electromagnetic waves in the shielding compartment (2), so as to simulate an electromagnetic environment; the stress application system is used for fixing a sample to be tested (9) in the shielding compartment (2), and applying stress to the sample to be tested (9); the data collection system is used for collecting electromagnetic environment data in the shielding compartment (2) and acting force data of the sample to be tested (9) after the application of stress thereto; and the control system is used for controlling, according to a preset test program and the data collected by the data collection system, the electromagnetic simulation system and the stress application system to execute reliability test on the sample to be tested (9). By means of the test apparatus, the stress performance of a sample to be tested (9) can be tested in a complex electromagnetic environment, providing a rapid, reliable and stable test apparatus for the electromagnetic reliability of an electronic device and a material.