Differential Inductive Sensor-to-Microcontroller Interface Circuit

被引：0

作者：

Kokolanski, Zivko ^{[1
]}

Gasulla, Manel ^{[2
]}

Reverter, Ferran ^{[2
]}

机构：

[1] Ss Cyril & Methodius Univ Skopje, Fac Elect Engn & Informat Technol, Rugjer Boskovic 18, Skopje 1000, North Macedonia

[2] Univ Politecn Cataluna, BarcelonaTech, Dept Elect Engn, Esteve Terradas 7,C4, Castelldefels 08860, Barcelona, Spain

来源：

2019 IEEE INTERNATIONAL INSTRUMENTATION AND MEASUREMENT TECHNOLOGY CONFERENCE (I2MTC) | 2019年

关键词：

differential sensor; displacement sensor; inductive sensor; microcontroller; sensor interface electronics;

D O I：

10.1109/i2mtc.2019.8826880

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

This paper proposes a low-cost interface circuit for differential inductive sensors where the sensor is directly connected to a microcontroller unit (MCU) without any active intermediate electronics in between. The timer embedded into the MCU is employed to measure the discharging or charging time interval of two passive 111, networks formed by each sensor coil and an external resistor. Two topologies of the circuit are presented, evaluating their advantages and drawbacks. One of the topologies is implemented using a low-cost 8-bit MCU (Atmel ATmega328P) and its transfer characteristics is evaluated when measuring a commercial displacement inductive sensor. Experimental results show that, in a range of +/- 25 mm, the non-linearity error is smaller than 1%, and the resolution is 9 bits for an overall measuring time of a few milliseconds.

引用

页码：1202 / 1206

页数：5

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