Controlling Firing Characteristics of Hot-Wire Devices with the Use of Electrothermal Response Parameter Screening

摘要

Many hot-wire components that are manufactured for the Department of Energy have, as part of the acceptance criteria, the requirement that the units be screened for the bridgewire thermal conductance factor. The screening has reduced the data scatter for no-fire results and helped raise the no-fire level of a given population by removing units with poor conductance. The bridgewire geometry and location can be verified by monitoring the thermal conductance. The control of the bridgewire leads to better uniformity of the loaded component. The all-fire level for a particular component is largely controlled by the pyrotechnic compacted around it. The density of the pyrotechnic can be monitored by measuring the thermal conductance of the wire-powder surface. (ERA citation 12:029181)