Overheating positioning detection device

CN114942085BActive Publication Date: 2026-05-26HANFANG (SHENZHEN) IND CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2022-05-31
Publication Date
2026-05-26

AI Technical Summary

Technical Problem

The existing technology lacks an over-temperature location detection device that can adapt to complex circuit environments and simultaneously monitor the temperature at multiple monitoring points, making it difficult to locate the over-temperature position.

Method used

The system employs a combination of optical signal transmitters, optical signal receivers, and bare optical fibers. It utilizes the deformation of the bare optical fiber when overheated, which causes the total internal reflection condition to be broken and visible light to leak out. The optical signal receiver determines the location of the overheating, and the electrical signal processing module determines the temperature change.

Benefits of technology

It enables accurate temperature monitoring of multiple monitoring points in complex circuit environments, reduces the amount of optical fiber used, saves manufacturing and usage costs, and improves response speed and accuracy.

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Abstract

This application provides an overheating positioning detection device, including an optical signal transmitter, an optical signal receiver, and a bare optical fiber. One end of the bare optical fiber is located at the optical signal transmitter and forms an optical transmission link with it, while the other end is located at the optical signal receiver and forms an optical transmission link with it. The overheating positioning detection device utilizes the fact that when the temperature of the location to be measured exceeds the glass transition temperature of the optical fiber, the fiber deforms due to overheating. The total internal reflection condition at the deformation point is disrupted, leading to the leakage of visible light. The location of this visible light leakage serves as a positioning indicator for the overheated point. Using a bare optical fiber allows for the detection of multiple locations to be measured with a single fiber. The presence of visible light leakage at the contact points between the bare fiber and each location determines whether the location is overheating, thus significantly reducing the amount of optical fiber used and saving on the manufacturing and usage costs of the overheating positioning detection device.
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Citation Information

Patent Citations

  • Optical delay optical fiber temperature sensor

    CN102494797A

  • Over-temperature positioning detection device

    CN218002739U

  • Optical module and assembly thereof

    JP1998339828A