Signal processing and compensating method of four-channel atmosphere polarization information detection sensor
A sensor signal, atmospheric polarization technology, applied in the direction of polarization influence characteristics, etc., can solve the problems of electrical signal additive drift error component, atmospheric polarization mode information uncertain random noise, multiple channel signal mismatch, etc.
Inactive Publication Date: 2009-05-27
HEFEI UNIV OF TECH
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However, in the patent specification with application number 200610040467.4, and in the existing photoelectric model-based atmospheric polarization information detection device and equipment polarization information acquisition and processing method, the signal response characteristics of the physical devices in the actual detection device are not considered Inconsistency and other situations have caused the problem of signal mismatch between multiple channels, which makes there are serious errors and noises in the actual detection signal
In addition, in the existing detection devices and equipment, most of the high-sensitivity photoelectric conversion devices are used. Due to the emphasis on the sensitivity of the photoelectric conversion device, the variability of the detection environment and the sensitivity of optical information are not fully considered, and they are not used in signal processing. Targeted and effective compensation methods, which affect the accuracy and reliability of atmospheric polarization information detection results
[0006] On the one hand, since the signal response characteristics of the physical devices in the polarized light perception and conversion units of the four channels cannot be completely consistent, the transmission characteristics of the four signal channels are different, resulting in an additive drift error component of the electrical signal after operation and amplification. On the other hand, since the transmission characteristics of the two circuits of operation and amplification circuits cannot be exactly the same, there will be multiplicative amplitude errors in the electrical signals after operation and amplification; finally, the physical devices of each channel in the detection device also have thermal noise, Physical noise such as component noise, as well as ambient light noise in different environments, these noises will cause uncertain random noise in the atmospheric polarization mode information obtained by the detection device
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[0057] see figure 1 , the process of the four-channel atmospheric polarization information detection sensor signal processing and compensation method in this embodiment is as follows:
[0058] Using the four-channel atmospheric polarization information detection sensor, the polarized light signals of the four channels are P 11 ,P 12 ,P 21 and P 22 ,Have:
[0059] P 11 =n 11 I(1+d cos 2(φ-φ 11 )) (1)
[0060] P 12 =n 12 I(1+d cos 2(φ-φ 12 )) (2)
[0061] P 21 =n 21 I(1+d cos 2(φ-φ 21 )) (3)
[0062] P 22 =n 22 I(1+d cos 2(φ-φ 22 )) (4)
[0063]n in formula (1), formula (2), formula (3) and formula (4) 11 , n 12 , n 21 and n 22 are the transmission response coefficients of the polarization sensor of the four channels in the sensor to light in a specific band, I is the normalized light intensity coefficient, d is the degree of polarization information in the atmospheric polarization mode, and φ is the polarization direction inf...
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A four-channel atmospheric polarization information testing sensor signal processing and compensating method, characterized in utilizing a method of step by-step signal processing, comprises: performing step by-step processing to real-time dynamic testing data from the four-channel atmospheric polarization information testing sensor, in the step by-step processing process, through two classifying compensation method of hard compensation and soft compensation, performing signal compensation and matching to error and noise of sensor step by-step signal, so as to obtain effective coherence compensation and suspension to drift error component and amplitude error of each channel signal of the sensor caused by different signal response and transmission characteristics of each channel step by-step physical device, and the random noise caused by the physical noise and environment optical noise of the sensor, therefore effective sensor output is obtained. Through performing atmospheric polarization mode information processing to the obtained digital electric signal, therefore the accurate, reliable atmospheric polarization mode information is obtained.
Description
technical field [0001] The invention belongs to the technical field of intelligent information acquisition and processing and bionic robot navigation, and relates to a signal processing method of a measuring device for atmospheric polarization information, in particular to a signal processing and compensation method of a four-channel atmospheric polarization information detection sensor. Background technique [0002] Sunlight itself is a natural light source, but it is scattered and reflected by particles in the atmosphere during atmospheric transmission, such as by O 2 and N 2 molecules, which produce correspondingly polarized light. Sunlight with different polarization directions and different polarization intensities forms a specific atmospheric polarization mode. Atmospheric polarization mode information mainly includes parameter information such as atmospheric polarization degree and polarization direction. Atmospheric polarization mode is closely related to geograph...
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IPC IPC(8): G01N21/21
Inventor 高隽范之国胡翊潘登凯范宁生
Owner HEFEI UNIV OF TECH
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