Electrochemical response test system using sample-and-hold offset balancing
The electrothermal response (ETR) test provides a means of evaluating the thermal coupling at the interface between the bridgewire and the explosive in an electroexplosive device (EED). A current pulse applied to the bridgewire increases its temperature and resistance. The resistance change, which is small compared to the initial resistance, is indicative of the condition of the interface. The test system described here separates the voltage due to the thermal heating from the total response (cold resistance and thermal resistance) by using a differential amplifier. The resultant signal represents the thermal response of the bridgewire. In this system the current pulse is synchronized with the sampling of the waveform recorder. The test chassis contains internal calibration and simulation modules. It can be operated manually from front panel controls or remotely through a computer.
- Research Organization:
- Sandia National Labs., Albuquerque, NM (USA); Ktech Corp., Albuquerque, NM (USA)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC04-76DP00789
- OSTI ID:
- 5951781
- Report Number(s):
- SAND85-2424; ON: DE86009560
- Country of Publication:
- United States
- Language:
- English
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