| 摘要 |
PROBLEM TO BE SOLVED: To soundly induce oscillations in circular direction in a liquid to be measured in a liquid testing apparatus by amplifying bending oscillations of piezoelectric diaphragms and transmitting them to an oscillating shaft and the liquid testing apparatus. SOLUTION: In this liquid testing apparatus, a plurality of the bending and oscillating piezoelectric diaphragms 19 are axially symmetrically arranged so as to bend and oscillate in axial directions with respect to the oscillating shaft 1. A lower oscillating end 14 of each diaphragm 19 is rigidly connected (oscillation-suppressingly connected) to an oscillation suppressing member 13. The inner end of an upper oscillating end 15 is rigidly connected (oscillaingly connected) to the oscillating shaft 1. The inner edge of each diaphragm 19 except the oscillating connected part 17 is made free to the oscillating shaft 1, and the bending oscillations of the lower oscillating end 14 of each diaphragm 19 is suppressed on the side of the oscillation-suppressing connected part 16 to amplify the bending oscillations of the upper oscillating end 15. The amplified bending oscillations of the upper oscillating end 15 are provided for the oscillating shaft 1 and the liquid testing device 3 provide for the lower end of the oscillating shaft 1 via the oscillating connected part 17 and are made to oscillate in circular direction in the liquid to be measured 2. COPYRIGHT: (C)2004,JPO
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