Automatic calibration method for use in electronic compass
An electronic compass and azimuth technology, applied to compass, measuring device, surveying and navigation, etc., can solve the problem of not being able to update calibration data
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[0036] Now, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same or similar elements are denoted by the same reference numerals even if they are depicted in different drawings.
[0037] Figure 4 is a block diagram illustrating the control module of the electronic compass of the present invention.
[0038] see Figure 4, the minimum and maximum calibration valid times T1 and T2 required by the system containing the controller are predetermined by the control module within the electronic compass. The minimum calibration valid time T1 is the minimum time during which the calibration data can be considered valid, and the maximum calibration valid time T2 is the maximum time during which the calibration data can be considered valid. In order to perform a valid calibration operation, the calibration duration must be longer than the minimum calibration valid time T1 and shorter than the m...
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