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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Ramadoss, N. George, B. |
| Copyright Year | 2015 |
| Description | Author affiliation: Dept. of Electr. Eng., Indian Inst. of Technol. Madras, Chennai, India (Ramadoss, N.; George, B.) |
| Abstract | This paper presents a simple digitizer suitable for differential variable inductive/reluctance sensors. The proposed scheme uses two digital I/O pins, a counter and a comparator of a microcontroller and obtains a digital output directly proportional to the measurand which is sensed using a differential variable inductive/reluctance sensor possessing either a linear or an inverse transfer characteristic. The scheme uses a ratio-metric approach in the computation and hence the output is less sensitive to variation in the parameters such as excitation voltage, reference voltage, offset of the comparator, etc. A prototype of the proposed system has been built and tested using standard variable inductors that emulated a differential inductive sensor following an inverse characteristic. The output recorded was linear across the full range and worst-case error noted was less than 0.3 %. For the prototype developed, the time taken to complete a measurement was 200 μs. The prototype digitizer has been interfaced with a commercially available LVDT and tested. The worst-case error observed in this test was 0.77%. Also, the same digitizer has been employed to get a digital readout from a differential variable reluctance based displacement sensor. The worst-case error was less than 0.83%. The test results establish the efficacy of, the simple and cost effective, scheme developed. |
| Starting Page | 148 |
| Ending Page | 153 |
| File Size | 1608933 |
| Page Count | 6 |
| File Format | |
| ISBN | 9781479961146 |
| DOI | 10.1109/I2MTC.2015.7151256 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2015-05-11 |
| Publisher Place | Italy |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Digitizer Microcontrollers Radiation detectors Inductors Differential inductive sensor Microcontroller interface Timer-counter Resistance Inductance DVRT Prototypes LVDT Linearization |
| Content Type | Text |
| Resource Type | Article |
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