Traffic flow metering device and method based on ultra-wide-band chaotic pulse

An ultra-broadband, traffic flow technology, applied in the traffic control system of road vehicles, traffic control systems, instruments, etc., can solve the problems of low accuracy, high cost, and difficult installation, and achieve convenient detection, low cost, The effect of low installation difficulty

Inactive Publication Date: 2013-12-25
重庆盖尔乐普科技发展有限公司
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Problems solved by technology

[0011] Aiming at the shortcomings of existing traffic flow detection equipment, such as difficulty in installation, low accuracy, and high cost, a traffic flow measurement system based on ultra-wideband chaotic pulses is proposed, which combines the good autocorrelation and cross-correlation characteristics of chaotic pulses, Effective combination of aperiodicity and aperiodicity and related detection, convenient detection of traffic flow

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  • Traffic flow metering device and method based on ultra-wide-band chaotic pulse
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  • Traffic flow metering device and method based on ultra-wide-band chaotic pulse

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Embodiment Construction

[0024] The implementation of the present invention will be further described below with reference to the accompanying drawings and specific examples.

[0025] The invention applies UWB to the detection technology in intelligent transportation, figure 1 Shown is the principle structure diagram of the traffic flow metering system based on the ultra-wideband chaotic pulse, which is distributed at the transmitter end and the receiver end. The chaotic signal generator produces a duration of T c The chaotic narrow pulse m(t) is then modulated by FM as the transmission signal s FM (t), to transmit signal frame length T s with chaotic narrow pulse duration T c difference (T s -T c ) triggers the timing switch to be turned on periodically, every T s time, the trigger timing switch is turned on, and the frequency modulation signal s FM (t) It is sent to the splitter through the timing switch and divided into two paths, one path is sent to the receiver through the power amplifier ...

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Abstract

The invention discloses a traffic flow metering device and method based on ultra-wide-band chaotic pulse and relates to the field of wireless communication; and aiming at the defects of large installation difficulty, low accuracy, higher cost and the like in the existing traffic flow detecting equipment, the invention provides the traffic flow metering device based on ultra-wide-band chaotic pulse. The metering method comprises the following steps of: effectively combining good self correlation, mutual correlation characteristic, wideband characteristic and aperiodicity of the chaotic pulse and the realizability of correlation detection, carrying out correlation processing on chaotic signals, estimating delayed time Delta t of a transmitting signal which is reflected by a vehicle body to reach a direct path of a receiver according to time delay amount of a template signal, calculating the height of the vehicle body, and then identifying the real-time traffic condition conveniently. According to the traffic flow metering device, not only can the interference of multiple lanes be resisted, but also the installation and the maintenance are easy, and the cost performance is higher.

Description

technical field [0001] The invention relates to the technical field of wireless communication, and relates to the application of the wireless communication technology, especially the chaotic pulse-based ultra-wideband technology in the field of intelligent transportation. Background technique [0002] With the acceleration of urbanization, automobile traffic has become one of the important symbols to measure urban modernization. While it brings people convenience and high-quality life, it also creates a series of social and environmental problems. Such as the contradiction between limited land resources and the increasing number of vehicles, the contradiction between the deterioration of the traffic environment and the demand for high-quality traffic service quality, the contradiction between the high-pollution traffic status and green environmental protection. [0003] In response to the current international energy issues, environmental protection issues, and the resulting...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B1/7163G08G1/065
Inventor 孔龙徐哲鑫龚帅王琳徐位凯
Owner 重庆盖尔乐普科技发展有限公司
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