B3.3 - Calibration or Testing of High-g Shock Accelero¬meters to 100,000 g and Higher
- SENSOR+TEST Conferences 2011
2011-06-07 - 2011-06-09
- Proceedings SENSOR 2011
- B3 - Mechanical Sensors I
- M. Mende, M. Brucke - SPEKTRA Schwingungstechnik und Akustik GmbH Dresden (Germany)
- 261 - 266
SPEKTRA has developed a wide range of Hopkinson Bar shock exciters providing shocks from 20 gn (200 m/s2) up to 200,000 gn (2,000,000 m/s2) for calibration and testing purposes. Although shock testing up to 10,000 gn (100,000 m/s2) is commonly performed and well understood, the development of shock exciters for the high shock range required some new ideas to overcome obstacles related to these extreme amplitudes.
The discussion will include basic aspects of the theory of a Hopkinson Bar and the application of the theory for development of a high-g shock exciter. It will also address the extreme dynamic parameters of high shock, such as the high forces generated and their impact on the mounting of the devices under test.
Furthermore, the traceable calibration of such high-g shock calibration systems will be examined. What are appropriate reference sensors and how can they be calibrated over the whole amplitude range? Results of measurements performed on SPEKTRA CS18 HS high shock and CS18 VHS very high shock calibration systems will illustrate the issues mentioned above and show that the development was successful.