关键词: 感应传感, 数字电感转换器, 串行外设接口

Abstract: Inductive sensing is a contactless, magnet-free sensing technology，it can precisely measure the position, motion, or composition of a metal or conductive target， also can detect the compression, extension, or twist of a spring. Now inductive measure method have limited in high power dissipation、lower accurate etc. In order to resolve this problem, A detection device was introduced, which based on two-channels inductance-to-digital converters LDC1612, used PCB coils as inductive sensor to detect metal, converted the sensor signals into digital signals, used an IIC interface connection to an ultra-low power MSP430F5529 in order to implement two-channels high-speed data transmission. The test results show that sub-micron resolution up to 28-bits in position-sensing applications, the device can be used in harsh environments, offered contactless sensing that is immune to nonconductive contaminants such as oil, water, dirt and dust, implemented two-channels contactless inductive sensor which has better performance, better reliability, greater flexibility, high performance and low power than existing sensing solutions.

Key words: Inductive sensor, Digital inductance converter, Serial peripheral interface