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Automated Method of Verifying Heat Pipe Connection to Base

IP.com Disclosure Number: IPCOM000241220D
Publication Date: 2015-Apr-06
Document File: 4 page(s) / 60K

Publishing Venue

The IP.com Prior Art Database

Abstract

Described is a quick and reliable method of testing heat pipe contact in heat sinks. Heat pipe contact to a heat dissipating surface is an essential component of heat sink function, the failure of which can lead to critical failures.

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Automated Method of Verifying Heat Pipe Connection to Base

This invention provides a quick and reliable way to make sure the heat pipe in a heat sink is well connected to the base of the heat sink. Heat pipe connection to the base is an important component of heat sink function, the failure of which can lead to critical failures. The current way to check overall heat sink function is to simply generate a resistance curve by heating the heat sink, flowing air over it, and measuring temperatures. This is the most reliable measure of the heat sink's ability to function but is highly process-intensive. The current way to check only the heat pipes' connection to the heat sink base is to take an X-ray image and visually detect contact issues. However, this is also process-intensive.

    This invention measures sound wave propagation along a single heat pipe and/or electrical conductivity between heat pipes to check whether the heat pipes have sufficient contact with the heat sink base. For the wave propagation, a sound generator can be placed at one end of the heat pipe, and a receiver at the other. The receiver can compare the frequency of the noise it receives with the frequency transmitted along a "known good" heat pipe. Based on characteristics of the received signal, conclusions can be drawn about the heat pipe's viability.

    To measure sound wave propagation, the heat pipe is attached to a generator and receiver. The generator sends a waveform at some frequency and amplitude, where it propag...