Bridgewire Temperature Estimation Using a Constant Current Supply

L. Weinman

Introduction: A brief description is presented of a means of measuring the average temperature of a bridgewire during firing using a constant current source. Many functional tests of electroexplosive devices, such as electric matches, utilize a constant current power supply as part of the firing circuit, as this is the only way to comply with many specifications that call for functional testing to be done at a specified current. Frequently, if a constant voltage source is used, the change in resistance of the bridgewire during heating will put the current out of the specification tolerance. This is often the case when producing electroexplosive devices for the military and aerospace customers.

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Ref: JPyro, Issue 14, 2001, pp68-71
(J14_68)

© Journal of Pyrotechnics and CarnDu Ltd



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