Patent ID: 9164063
Filing Date: 2015-10-20
Classification: G01N

Abstract:
1. A sensing device to be connected to one of a plurality different kinds of piezoelectric resonators for sensing a target substance in a sample fluid based on oscillation frequency of the connected piezoelectric resonator, wherein the connected piezoelectric resonator comprising: a piezoelectric piece; an electrode disposed on the piezoelectric piece; and an adsorbing layer located on the electrode, the adsorbing layer adsorbing the target substance in the sample fluid, wherein the connected piezoelectric resonator is configured to change a natural frequency of the connected piezoelectric resonator by adsorbing the target substance, wherein the sensing device comprises: an oscillator circuit commonalized for the plurality different kinds of piezoelectric resonators having different crystal impedance values, and configured to be driven with voltages for the plurality different kinds of piezoelectric resonators, so that each of the corresponding voltages is corresponding to the crystal impedance value of the connected piezoelectric resonator, wherein the connected piezoelectric resonator is connected to the oscillator circuit; a voltage supply unit configured to supply a DC drive voltage to the oscillator circuit, so that the oscillator circuit is driven with the DC drive voltage corresponding to the crystal impedance value of the connected piezoelectric resonator; an information obtaining unit configured to obtain a type-information of the connected piezoelectric resonator; and a voltage adjusting unit configured to adjust the DC drive voltage to a voltage corresponding to the connected piezoelectric resonator based on the type-information obtained by the information obtaining unit.