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Non-contact pavement weather condition sensor and application method thereof

A state sensor, non-contact technology, applied in the measurement of scattering characteristics, etc., can solve the problems of increasing the complexity and cost of the system, and achieve the effect of simple structure, reliable performance, and improved detection accuracy.

Inactive Publication Date: 2014-09-24
XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI +1
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

[0011] Such techniques require extensive polarization separation optics and detectors, adding to system complexity and cost

Method used

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  • Non-contact pavement weather condition sensor and application method thereof
  • Non-contact pavement weather condition sensor and application method thereof
  • Non-contact pavement weather condition sensor and application method thereof

Examples

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Embodiment 1

[0058] Such as Figure 4 As shown, the beam expander 2 and detector 3 are fixed together and kept parallel. Install both on the rail 6 again. In this embodiment, the incident angle of the light wave is the same as the receiving angle of the detector. The beam expander 2 and the detector 3 move on the guide rail 6, and the incident angle of the laser light and the receiving angle of the detector change accordingly. Measure the reflected light power-angle spectrum, and determine the meteorological state of the road surface according to the characteristics of the spectral lines.

Embodiment 2

[0060] Such as Figure 5 As shown, in this embodiment, the beam expander 2 is separated from the detector 3, and the detector is fixed at the normal position of the road surface to receive the forward reflected optical power. The beam expander moves on the guide rail 6, and the incident angle of the laser light changes accordingly. Measure the reflected light power-angle spectrum, and determine the meteorological state of the road surface according to the characteristics of the spectral lines.

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Abstract

The invention provides a non-contact sensor for judging the pavement weather condition by measuring the energy of the pavement diffuse reflection light. The sensor can effectively distinguish the dryness, ponding and icing of the pavement. The non-contact pavement weather condition sensor mainly comprises a laser, a data acquisition and analysis system and an arc guide rail positioned on the pavement to be measured, wherein a beam expander and a photoelectric detector are mounted on the arc guide rail; the light emitted by the laser irradiates the pavement to be measured through the beam expander; the photoelectric detector receives the energy of the pavement diffusion reflection light, converts the light signal into an electric signal and delivers into the data acquisition and analysis system; and the beam expander can move along the arc guide rail, or the beam expander and the photoelectric detector are relatively fixed and can move together along the arc guide rail. The non-contact pavement weather condition sensor provided by the invention is simple in structure, low in cost, comprehensive in function and reliable in performance and can be applied to the measurement of various highway pavement weather conditions to provide basis for the decision of the road traffic management department.

Description

technical field [0001] The invention relates to a non-contact road surface meteorological state sensor, which is used for judging whether the road surface is dry, wet or icy. Background technique [0002] In order to improve road traffic efficiency, it is necessary to obtain various information in real time. Considering that all kinds of vehicles rely on ground friction to drive and brake, road surface water and ice will significantly reduce the friction between tires and the ground, so road surface condition information is very closely related to road traffic efficiency and driving safety. Obtaining road surface condition information requires the use of road surface weather state sensors. According to different detection methods, road surface weather sensors are mainly divided into two types: contact type and non-contact type. [0003] Prior art one: [0004] Contact pavement weather sensor based on conductivity measurement. In the liquid phase of the water-salt (snow-me...

Claims

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Application Information

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IPC IPC(8): G01N21/47
Inventor 王允韬阮驰徐松松陶圣
Owner XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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