| 摘要 |
PURPOSE:To convert displacement into an electric signal with simple constitution, by performing digital processing through prescribed arithmetic regarding two resonator outputs which vary in resonance frequency differing in direction mutually. CONSTITUTION:The 1st and 2nd energizing parts EX1 and EX2 that correspond to the 1st and 2nd resonators X1 and X2 equipped to elastic materials 3 and 4 coupled in a body generate resonance frequency outputs varying with the displacement of displacement force P in the opposite directions, and AND gates G1 and G2 are opened according to variation at the specific count terminal of ring counter CT to apply them to arithmetic part CA, generating positive and negative equal voltages, via alternate FETs Q1 and Q2. The positive and negative equal voltages supplied when the resonance frequency outputs outputted by the arithemtic part are in inverse proportion are integrated by output part CU and then processed by operational amplifier A to output an electric signal which is obtained by dividing the difference between both the resonance frequencies by the sum, free from an influence of the rate of variation due to temperature, and based upon the mean variation rate of the resonance frequencies corresponding to the displacement. The constitution of the converter is simplified because of said digital processing. |
