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Road icing condition inspection method based on terahertz wave

An inspection method, terahertz technology, is applied in the field of road icing condition inspection based on terahertz waves, which can solve problems such as accurate measurement and inability to

Active Publication Date: 2022-03-25
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Claims
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Problems solved by technology

In addition, the rough particle size on the surface of the ice layer is on the order of millimeters or submillimeters, and it is impossible to use a millimeter wave for accurate measurement

Method used

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  • Road icing condition inspection method based on terahertz wave
  • Road icing condition inspection method based on terahertz wave
  • Road icing condition inspection method based on terahertz wave

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Embodiment Construction

[0030] The specific technical solutions of the present invention are described in conjunction with the examples.

[0031] Such as figure 1 As shown, the terahertz radar mainly includes antenna, transmitter, receiver and power meter. Terahertz radar is different from microwave and millimeter-wave radars. The transmitter of terahertz radar can emit terahertz signals and feed them to the antenna, and then radiate to the icy road through the antenna. The antenna can be a horn antenna, a Cassegrain antenna, or an antenna array. After road scattering, the backscattered signal is collected by the same antenna, and after passing through the transceiver switch, it is sent to the power meter through the receiver

[0032] Such as figure 2 As shown, this embodiment applies the terahertz radar to the icy road surface. It can be installed inside the lights when radar is used for road detection. The radar can be used to transmit terahertz signals. After the signal interacts with the ic...

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Abstract

The present invention provides a terahertz wave-based inspection method for road icing conditions. The terahertz radar is installed on the front end of the vehicle lamp or on the street light poles on both sides of the road, and the incident angle θ 1 Transmit a terahertz signal to the icy road surface, after the signal interacts with the icy road surface, the backscattered signal returns to the terahertz radar and is received by it; the received signal is transmitted to the power meter, and the signal is measured by the power meter , so as to obtain the interaction information between the signal and the icy road surface. The terahertz radar of the present invention is more sensitive to the smoothness of the road surface, and the use of the terahertz radar with smaller size and lighter volume can reduce the system volume and improve the system integration. Terahertz radars are less affected by most types of pollution, occlusions, and harsh weather particles outdoors; this makes them suitable for road detection when optical sensing fails in harsh weather such as snow, rain, fog, and smog demand.

Description

technical field [0001] The invention belongs to the technical field of road surface detection, and in particular relates to a method for inspecting road icing conditions based on terahertz waves. Background technique [0002] Road surface conditions, such as smoothness, ice and snow thickness, etc., have always been important factors affecting driving safety. By mastering the road conditions, the vehicle or driver can judge the quality of the road conditions in real time, so as to control the driving speed and lighting mode in time. In the cold season, rain and snow often cause ice layers of different thicknesses to appear on the road surface, affecting driving speed and safety. [0003] The wavelength of microwave signals is on the order of meters, so microwave radar is often used to detect the thickness of ice layers in areas such as straits and glaciers. In 1998, Torgny Vinje, a member of the Polar Research Institute of Norway, successfully applied microwave radar to th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E01C23/01
CPCE01C23/01
Inventor 马建军李沛安
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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