These accelerometers are small, lightweight, easy to install and can take shocks up to 200,000g’s.
Our piezoresistive shock accelerometers are essential in measuring accurate Shock Response Spectrum. As a result, they are frequently specified for applications involving weapons testing, explosions and missile penetration studies.
|TYPICAL APPLICATIONS||REPRESENTATIVE MODELS|
|Weapons and rocket testing||7270A, 7280A, 7274, 136, 7250A|
|High shock data recorders||74, 75|
|Pyroshock testing||7255A, 7280A, 7280AM4, 7284|
|Fuze/safe and arm||72|
|Mechanical shock and impact||7270A, 7280A, 2255B, 2225M5A, 133|
Data recorders for military weapons testing typically require accelerometers with both high g ranges and high sampling rates. The sensors must be easily mounted in a small package and integrated with the recording device.
The Model 75 family of triaxial accelerometers features three sensors in a mutually orthogonal arrangement in a leadless chip carrier (LCC) package that supports mounting by surface mount technology (SMT), re-flow soldering (with epoxy underfil) or adhesive mounting (with hand soldering).
For each axis, the sensor is sculptured from a single chip of silicon, which includes the inertial mass and strain gauges arranged in a four-active-arm Wheatstone bridge circuit.
There are several different pyroshock standards but a common one derived from MIL-STD-810G, Method 517 for near-field pyroshock has frequencies greater than 10,000 Hz and peak amplitudes greater than 10,000 G’s.
The miniature, tubular-shaped, piezoelectric 7255A has an integral stud for mounting. The flat, low profile piezoresistive 7280A has two holes for screw mounting while 7280AM4 is hexagon-shaped and stud mounted. The higher profile, rectangular-shaped 7284 is a triaxial accelerometer.
Miniature pressure sensors are used for studies of structural loading by shock waves resulting from blast explosions. The model 8511A piezoresistive pressure transducer has a 3/8-inch mounting thread and is available in ranges from 5000 to 20 000 psig.
For harsh environments, where there is particle impingement, an optional version is available with a protective screen and a black silicone grease coating which further reduces photoflash sensitivity and provides an effective thermal barrier for short duration, high temperature service.