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Noise removal algorithm of road surface state detection device

A detection device and road surface state technology, which is applied in the direction of measurement devices, complex mathematical operations, and material analysis through optical means, can solve problems such as inaccurate detection accuracy, achieve accurate detection data, and improve driving safety.

Pending Publication Date: 2021-11-05
武汉致腾科技有限公司
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Problems solved by technology

However, in practical applications, the intensity of emitted light is greatly affected by the ambient temperature, so the detection device that uses light-emitting diodes and photodiodes will cause inaccurate detection accuracy due to the influence of ambient temperature

Method used

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  • Noise removal algorithm of road surface state detection device
  • Noise removal algorithm of road surface state detection device
  • Noise removal algorithm of road surface state detection device

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Embodiment Construction

[0013] In order to further explain the technical solution of the present invention, the present invention will be described in detail below through specific examples.

[0014] A noise removal algorithm for a road surface state detection device is implemented through the following steps:

[0015] Step 1: Input a plurality of operating currents I with a linear proportional relationship to the light-emitting diode at a specific wavelength i (i=1, 2,..., n), the photodiode operates according to multiple operating currents I i Correspondingly, multiple reflected light intensities P i (i=1, 2, ..., n); that is, n groups of sample observations (I 1 , P 1 ), (I 2 , P 2 ),..., (I n , P n );

[0016] Step 2, utilize mathematical statistical method to a plurality of operating current I of step 1 i Multiple reflected light intensities P corresponding to i Do linear regression to get the mathematical structural formula as P i =β·I i +ε i (i=1, 2,..., n), where the slope β of ...

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Abstract

The invention discloses a noise removal algorithm of a road surface state detection device, which is implemented through the steps of 1, inputting a plurality of working currents Ii with a linear proportional relation to a light-emitting diode under a specific wavelength, and correspondingly obtaining a plurality of reflected light intensities Pi; 2, performing linear regression on the plurality of working currents Ii and the plurality of corresponding reflected light intensities Pi in the step 1 by using a mathematical statistical method to obtain Pi = beta * Ii + epsilon i (i = 1, 2,..., n); 3, calculating a regression coefficient beta by using a least square method; and 4, calculating the current reflectivity by using the reflected light intensity coefficient beta in the step 3. Compared with the prior art, the noise removal algorithm has the advantages that noise is removed in a least square calculation mode, the calculated reflected light intensity coefficient is a true value and is free of noise doping, the calculated reflectivity is more accurate when the reflected light intensity coefficient is used for calculating the reflectivity, detection data of the road surface state detection device is more accurate, and the driving safety is greatly improved.

Description

technical field [0001] The invention relates to the field of traffic road detection, in particular to a noise removal algorithm of a road surface state detection device. Background technique [0002] The detection devices of the existing road surface state (such as dry road surface, water-logged road surface, icy road surface, snow-covered road surface, sewage road surface and sandy soil road surface) are used differently. The inventor has developed a combination of light-emitting diode and photodiode. The detection device to realize the detection result, the principle is that the light-emitting diode at a specific wavelength emits emission light, and the emission light is reflected into the photodiode by the covering on the road surface state, and the photodiode measures the number of photons received by the reflected light of a specific wavelength , to reflect the reflected light intensity, and use this reflected light intensity to calculate the reflectance of a specific w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/552G06F17/15
CPCG01N21/552G06F17/15
Inventor 王华全威郭慕瑶田进保魏志超满永兴
Owner 武汉致腾科技有限公司
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