Patent ID: 7716000
Filing Date: 2010-05-11
Classification: G01D

Abstract:
1. A sensor apparatus comprising: a sense circuit to convert inputted physical quantity to electrical signal, an analog signal processing unit having an amplification circuit and an A/D converter, the amplification circuit amplifying an analog signal outputted from the sense circuit, and the A/D converter converting the output signal of the amplifier to digital data, a sensing interval setup unit to set a sensing interval for the sense circuit, a power supply unit to supply electric power to the sense circuit and the analog signal processing unit, a power supply control unit to control the power supply unit, a storage unit to store the digital data outputted from the A/D converter every sensing interval of the sensing interval, a data value change judgment unit to change the setup of the sensing interval by the sensing interval setup unit, the data value change judgment unit changing the control mode of the power supply control unit in response to judgment of value change between a plural number of digital data designated from the digital data being stored in the storage unit, an offset adjustment unit to adjust the offset voltage of the amplification circuit, a sensitivity adjustment unit to adjust the amplification degree of the amplification circuit, a program memory to store an adjustment program to adjust the offset voltage and the sensitivity of the amplification circuit, and an adjustment processing unit to control the offset adjustment unit and the sensitivity adjustment unit based on the adjustment program stored in the program memory.