Performance test of a mechanical impedance gauge based on strain measurement on a rod

✍ Scribed by K.G. Sundin

• Publisher: Elsevier Science
• Year: 1985
• Tongue: English
• Weight: 452 KB
• Volume: 102
• Category: Article
• ISSN: 0022-460X
• DOI: 10.1016/s0022-460x(85)80058-4

✦ Synopsis

An impedance gauge based on measurement of strains at two cross sections of a slender rod has been tested on practical objects. Sensitive semiconductor strain gauges are used and the impact force necessary for excitation is therefore low. Measurements were conducted with the gauge held in contact with the test objects by hand and excited by light strokes from a hammer. With this technique impedances in the transverse direction of beams were measured in the frequency range 20 Hz to 2 kHz. Similar measurements were also conducted with a conventional impedance head for comparison. From the results of the measurements it is concluded that the performance of the impedance gauge is good under the prevailing experimental conditions.