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Vehicle speed measuring method

A technology of vehicle speed and vehicle detectors, applied in traffic control systems, instruments, traffic control systems of road vehicles, etc., can solve problems such as inaccurate results and large errors

Active Publication Date: 2013-11-06
中山市路讯智能交通科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problems of large errors and inaccurate results encountered by wireless vehicle detectors in measuring vehicle speed in the prior art, the present invention provides a vehicle speed measurement system that uses the relative time method to accurately measure vehicle speed

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Embodiment Construction

[0013] The wireless vehicle detector provided by the present invention will be further described below in conjunction with the accompanying drawings. It should be pointed out that the technical solution and design principle of the present invention will be described in detail below only with an optimized technical solution.

[0014] The wireless vehicle detector used in the vehicle speed measurement system provided in this embodiment is a geomagnetic vehicle detector, which measures the existence of the vehicle by detecting the disturbance of the earth's magnetic field by the vehicle. refer to figure 1 , the structural block diagram of the wireless vehicle detector, the wireless vehicle detector 100 includes a controller 10, a switch control circuit 20, a geomagnetic sensor 30, an acceleration sensor 40, a power supply 50, a first RF communication module 61, and a second RF communication module 62 and USB / light module 70. Among them, the on / off circuit 20 is used for an optio...

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Abstract

The invention relates to a vehicle speed measuring system, which comprises two wireless vehicle detectors and a base station, wherein the two wireless vehicle detectors are arranged at a distance; each wireless vehicle detector comprises a controller, a geomagnetic sensor, a power supply and at least one radio frequency (RF) communication module; and the base station is arranged within the effective wireless communication distance of the two wireless vehicle detectors and is used for receiving data sent by the two wireless vehicle detectors and processing the data. In the vehicle speed measuring system, the base station as common equipment is fully utilized, and a relative time method is utilized to convert the measured time of a vehicle passing the two wireless vehicle detectors into the time of the vehicle relative to the base station, thereby, the time revision when the speed is measured by the two wireless vehicle detectors is avoided, measuring errors are reduced, and the vehicle speed measuring accuracy is improved.

Description

technical field [0001] The invention relates to a vehicle speed measurement technology, in particular to a vehicle speed measurement system including a wireless vehicle detector and a measurement method thereof. Background technique [0002] Vehicle detectors are usually used in multiple intelligent transportation systems such as intelligent signal light control systems, traffic flow detection systems, electronic police systems, urban entrance and exit management, and urban traffic guidance systems to detect the presence and speed of vehicles. [0003] The traditional ground induction coil vehicle detector detects the vehicle by digging a wire slot on the road surface and winding a coil inside, and the data is then excavated and the wire slot is connected to the roadside control cabinet by wire to detect the slotting area of ​​the coil Usually 1.2*0.8 meters, and the length of communication trunking can reach hundreds of meters, so the construction is complex, labor is expen...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G08G1/052G08G1/042
Inventor 杨多猛
Owner 中山市路讯智能交通科技有限公司