Design of vehicle velocity detection radar and signal processing method

A vehicle speed, high-speed digital signal technology, applied in the field of signal processing, can solve problems such as speeding vehicles running out, and achieve the effect of low price, small size, and positive social significance

Active Publication Date: 2012-06-27
嘉兴聚速电子技术有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The speed data given by the radar often requires some additional processing, so that the time delay of giving the speed data reaches more than 0.3 seconds
This time delay can cause severe speeding vehicles to run out of the range of conventional video cameras and cameras to obtain a clear digital image of the license plate

Method used

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  • Design of vehicle velocity detection radar and signal processing method
  • Design of vehicle velocity detection radar and signal processing method
  • Design of vehicle velocity detection radar and signal processing method

Examples

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Embodiment Construction

[0028] as an example, figure 1 shows the monitoring of 3 lanes using 3 single-lane radars, and it is assumed that these three radars are installed on the cross branches of the roadside trunk. If there is a road crossing, the radar can be installed on the crossing for each lane respectively. The horizontal and vertical beamwidths of the antenna are denoted as θ and φ, respectively. The angle between the radar beam axis and the ground is denoted as α. Using the commonly used radar installation height and speed measuring distance, as well as the typical lane width, the limit of single lane detection requirement on the horizontal beam width θ can be easily calculated. Specifically, θ is required to be less than 10° or less.

[0029] figure 2 In the overall design block diagram of the radar, 1 is the transmitting array antenna, 2 is the receiving array antenna, and 3 is the transceiver microstrip circuit. For the specific realization of the transceiver microstrip circuit see ...

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Abstract

A vehicle speed detection radar design and signal processing method is embodied by a radar design proposal for achieving the comprehensive aims of low price, high performance and small size. A radar is composed of two parts of a radar front end and a high-speed digital signal processor; and the front end of the radar is composed of a transmitting micro-band array antenna, a receiving micro-band array antenna, a voltage control microwave source with a frequency stabilization circuit, a dual-line balanced mixer, a dual-channel Doppler signal amplification-filter circuit and a dual-channel analog-digital conversion circuit. The front end of the radar uses the integrated design on the structure and the electricity, and the high-speed digital signal processor uses the fast discrete Fourier transform and the orthogonal signal processing methods to obtain the target speed value. The micro-band array antenna of the invention has good direction, so the radar can respectively monitor each lane;a radar system has fast response time and can detect the vehicles which excessively exceed the speed limit; the radar system simultaneously has thinner size, good anti-interference performance, low material cost and low processing cost.

Description

technical field [0001] The invention relates to the fields of electronic information and traffic safety, and proposes a design scheme for detecting vehicle speed radar and a signal processing method for the scheme. technical background [0002] Traffic safety management requires limiting the speed of vehicles traveling on the road. Microwave speed measuring radar has a series of advantages such as high measurement accuracy, all-weather, high reliability, etc., and has been widely used. The speed radar can be used to form a vehicle speed warning sign to prompt overspeeding and slow vehicles; it can be combined with a digital camera or video camera to form a speeding capture system. In order to ensure the accuracy of capturing law enforcement, the radar beam is required to be narrow enough to illuminate only one lane at the speed measuring position. For multi-lane situations, each lane needs to be configured with a speed radar, see figure 1 schematic diagram. Radars that i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S13/58G01S7/28G01S7/36
Inventor 邹谋炎
Owner 嘉兴聚速电子技术有限公司
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