Measurement of low shock pressures with piezoresistive carbon gauges
Abstract
A new sensitive technique which permits the detection of small pressures in shock waves down to 5 bars with good time resolution has been developed. It consists of a pulsed double-compensated Wheatstone bridge in conjunction with piezoresistive carbon gauge transducers. It is shown that the advantages of piezoresistive gauges, such as short rise time, small dimensions, and in-material stress measurement, may be utilized for low shock pressure recording even in explosive environments, an area previously dominated by piezoelectric gauges. Comparative data for the two types of sensors are presented for shock tube side-on and head-on collision experiments and underwater explosions. This new development opens the possibility of PRG applications in classical fields of low shock pressure recording such as gas dynamics and underwater explosions.
- Publication:
-
Review of Scientific Instruments
- Pub Date:
- October 1978
- DOI:
- 10.1063/1.1135291
- Bibcode:
- 1978RScI...49.1477K
- Keywords:
-
- Piezoresistive Transducers;
- Pressure Sensors;
- Shock Wave Propagation;
- Circuit Diagrams;
- Collision Parameters;
- High Resolution;
- Underwater Explosions;
- Volt-Ampere Characteristics;
- Wheatstone Bridges;
- Instrumentation and Photography;
- 47.40.-x;
- 07.35.+k;
- Compressible flows;
- shock waves;
- High-pressure apparatus;
- shock tubes;
- diamond anvil cells