SELF-CALIBRATING LINEAR VOLTAGE DIFFERENTIAL TRANSFORMER DEMODULATOR
First Claim
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1. A calibration system comprising:
- an excitation module that introduces an excitation signal to a primary coil of a differential transformer;
a measurement module that measures, at a first phase shift, a positive value of an induced signal, the induced signal being created in a secondary coil of the differential transformer due to the excitation signal;
a calculation module that compares the positive value to a last positive value to form a compared positive value; and
a calibration module that changes the first phase shift based on the compared positive value.
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Abstract
A calibration system includes an excitation module that introduces an excitation signal to a primary coil of a differential transformer, a measurement module that measures, at a first phase shift, a positive value of an induced signal. The induced signal is caused by the excitation signal on a secondary coil of the differential transformer. The system further includes a calculation module that compares the positive value to a last positive value to form a compared positive value, and a calibration module that changes the first phase shift based on the compared positive value.
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Citations
15 Claims
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1. A calibration system comprising:
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an excitation module that introduces an excitation signal to a primary coil of a differential transformer; a measurement module that measures, at a first phase shift, a positive value of an induced signal, the induced signal being created in a secondary coil of the differential transformer due to the excitation signal; a calculation module that compares the positive value to a last positive value to form a compared positive value; and a calibration module that changes the first phase shift based on the compared positive value. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A calibration method comprising:
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introducing an excitation signal to a primary coil of a differential transformer; measuring, at a first phase shift, a positive value of an induced signal, the induced signal being created in a secondary coil of the differential transformer due to the excitation signal; comparing the positive value to a last positive value to form a compared positive value; and changing the first phase shift based on the compared positive value.
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- 8. The method of 7, wherein the first phase shift is increased if the positive value is less than the last positive value and is decreased if the positive value is greater than the last positive value.
Specification