A Hardened, Self-Recording Instrumentation Device for Explosives Storage Safety Research
Abstract
The product of this development effort was the Hardened Data Acquisition System, or HDAS. The basic HDAS module is a miniature, solid-state device containing an instrumentation amplifier, an auxiliary gain amplifiers, an 11-bit flash analog-to-digital converter, a 128 kiloword (16-bit word) memory, and an output interface. The module is encapsulated in an epoxy/glass microbead matrix to provide shock hardening. Together with a shock-hardened 10.5-volt battery power supply, the complete unit measures only 15 cm long, 6.5 cm wide and 4 cm thick. The data sample rate is adjustable from 1 MHz down to less than 10 kHz, with associated recording times of 120 msec to 12 seconds, respectively. The recorder can be activated either by a small, expendable cable connection, or by an internal shock-sensitive switch. Data is recorded in a continuous loop mode after the device is activated. The internal battery allows the data to be stored for five months or more. After the unit is recovered following a test, it can be connected to a portable computer and a plotter to immediately produce finished plots of the data record. Filtering, baseline correction, and single and double integration can also be performed within a very few minutes, as desired.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 1992
- Accession Number
- ADA530353
Entities
People
- L. K. Davis