DocumentCode :
2943683
Title :
A novel smart interface for voltage-generating sensors
Author :
Li, Xiujun ; Meijer, Gerard C M ; Schnitger, Erik J.
Author_Institution :
Fac. of Electr. Eng., Delft Univ. of Technol., Netherlands
Volume :
2
fYear :
1997
fDate :
19-21 May 1997
Firstpage :
1472
Abstract :
A novel low-cost smart interface for self-generating sensors, for instance thermopiles and thermocouples, has been presented. The proposed interface acts as an asynchronous converter for DC voltages or currents employing a relaxation oscillator which output is a period-modulated signal. A microcontroller is used to measure the output signal from the interface, process data and output the measured sensor signal. The system does not need the accurate A/D converter. Experimental results show that the interface is able to measure voltages in the range of 0~5 V, with an accuracy and resolution of ±64 ppm and 20 ppm, respectively. The measurement time is less than 100 ms
Keywords :
computerised instrumentation; electric sensing devices; intelligent sensors; peripheral interfaces; relaxation oscillators; signal processing equipment; thermocouples; thermopiles; voltage measurement; 0 to 5 V; 100 ms; A/D converter; DC currents; DC voltages; Martin relaxation oscillators; asynchronous converter; measurement time; microcontroller; period-modulated signal; self-generating sensors; smart interface; thermocouples; thermopiles; voltage-generating sensors; CMOS technology; Capacitors; Circuits; Intelligent sensors; Logic; Microcontrollers; Oscillators; Signal processing; Switches; Voltage measurement;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Instrumentation and Measurement Technology Conference, 1997. IMTC/97. Proceedings. Sensing, Processing, Networking., IEEE
Conference_Location :
Ottawa, Ont.
ISSN :
1091-5281
Print_ISBN :
0-7803-3747-6
Type :
conf
DOI :
10.1109/IMTC.1997.612444
Filename :
612444
Link To Document :
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