A high-precision multi-channel signal calibration method and device
A calibration method and multi-channel technology, which is applied in the field of high-precision multi-channel signal calibration methods and devices, can solve the problems that digital signals cannot be aligned on the time axis, and achieve the effect of eliminating principle errors
Active Publication Date: 2022-06-17
GIGA FORCE ELECTRONICS CO LTD
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Problems solved by technology
[0003] In order to solve the problem in the prior art that the number of analog / digital converters (ADC) is less than the number of channels of the signal, because each signal needs to be converted to analog / digital in turn, the signal needs to be processed in pairs, because the signal path and analog / digital The time delay of the conversion causes the above-mentioned problems that the digital signal cannot be aligned on the time axis. Now a method is proposed to propose a time delay for the polling and sampling of the sensor, the filter amplifier circuit, the multiplex switch, and the ADC. Calibrate together to align the signals on the time axis, eliminate an important principle error, and achieve high-precision measurement methods and devices
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[0054] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.
[0055] It should be noted that the embodiments of the present invention and the features of the embodiments may be combined with each other under the condition of no conflict.
[0056] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but it is not intended to limit the present invention.
[0057] The present invention includes a high-precision multi-channel signal cali...
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The present invention provides a high-precision multi-channel signal calibration method and device, which are suitable for calibrating the processing timing of paired signals in a signal sampling device. The signal sampling device includes a multi-channel signal sampling channel and a multi-channel signal processing unit. The number of signal sampling channels is greater than the number of signal processing units; including: providing at least one pair of calibration signals that meet the preset conditions; sampling the at least one pair of calibration signals for at least one cycle to obtain the sampling results of each calibration signal; the sampling results The offset is performed on the time axis of the sampling period to obtain the best time offset value between the sampling results, which is used as the time axis calibration value of the signal sampling device. The beneficial effect of the technical solution is that the sensor, the filter amplifier circuit, the multi-way selector switch, and the time delay of the ADC sampling in turn are integrated together for calibration, so that the signals are aligned on the time axis and an important principle error is eliminated. Thereby realizing the method of high-precision measurement.
Description
technical field [0001] The invention relates to the technical field of communications, and in particular, to a high-precision multi-channel signal calibration method and device. Background technique [0002] With the development of digital signal processing technology, in the products that measure physical quantities, the signal input loop mostly adopts such as figure 1 In the structure shown, after the physical signal passes through the sensor, the filter amplifier circuit, and the digital / analog converter (ADC), complex digital signal processing is performed in the DSP or MCU. The sensor converts the physical signal into an electrical signal 1 (voltage or current), and the filter amplifying circuit converts the electrical signal 1 into an electrical signal 2 suitable for the ADC input range. After the ADC converts the electrical signal 2 into a digital signal, it is calculated by DSP or MCU Then, the measured value or characteristic signal of the physical quantity is obta...
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IPC IPC(8): G01D18/00
CPCG01D18/00
Inventor 江红郑朝晖倪卫华
Owner GIGA FORCE ELECTRONICS CO LTD