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[ pdf ] Inductively Coupled Sensor/Actuator System for Digital Closed-Loop

Inductively Coupled Sensor/Actuator System for Digital Closed-Loop Download
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times Topic under  Control Engineering
Source: www.imtek.de 
File size: 487.65 KB
File type: pdf
Last download on: Thu May 10, 2012 12:17:01 PM
Short Desciption:
Key-Words: - Power actuator, sensor, ratiometric measurement, high temperature ... hermetic seal, closed-loop control 1 Introduction ... Thus, only two precision components are required ...

Summary:
This paper presents a sensor/actuator system for high-temperature applications with the complete measurement electronics and sensors integrated into the actuator. The data transmission is implemented as point-to-point Power Line Communication (PLC), between the sensor/actuator system and its control unit. A separable transformer serves as an inductively coupled contactless connector for both power and bidirectional PLC-data, allowing for a perfect hermetic seal. We discuss the increased requirements for the measurement electronics at high operating temperatures and we present a special ratiometric self-calibration technique to eliminate temperature drifts that is also suitable for integration into an Application Specific Integrated Circuit (ASIC).
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