The fluidic vibrating string accelerometer

✍ Scribed by W.K. Clark; W. Lederman; M.F. Smith

• Book ID: 102990568
• Publisher: Elsevier Science
• Year: 1970
• Tongue: English
• Weight: 692 KB
• Volume: 6
• Category: Article
• ISSN: 0005-1098
• DOI: 10.1016/0005-1098(70)90004-x

✦ Synopsis

A fluidic vibrating string accelerometer can be built with a direct digital output, to operate with an accuracy of better than ___0.5 per cent over a wide range of environmental conditions. Summary--A fluidic accelerometer with a direct digital output has been designed. A siesmic mass is suspended by two fine wires which are excited pneumatically and caused to vibrate in a transverse mode. Acceleration increases the tension and frequency in one wire and decreases the tension and frequency in the other wire. Fluidic techniques are used to obtain a beat frequency proportional to acceleration. This frequency is obtained without resorting to analog to digital conversion techniques which limit the aecelerometer accuracy. The device can be used as a velocity indicator by accumulating the total number of pulses in a given time period in a fluidic counter. A zero g condition is indicated by a steady output pressure, aeutally zero frequency. Laboratory tests and analysis indicate that this device is capable of 0.1 per cent accuracy over a wide range in operating temperature, pressure, and vibration level.