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Multi-lane non-contact axle number automatic calculation method and system

A non-contact, automatic calculation technology, applied in calculation, complex mathematical operations, computer parts, etc., can solve problems such as high cost and difficult equipment maintenance

Pending Publication Date: 2022-02-01
COSCO SHIPPING TECH CO LTD
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Problems solved by technology

[0008] In view of the existing dynamic calculation technology of the number of axles, which can only be analyzed for a single lane and requires embedded sensors, there are problems such as difficulty in equipment maintenance and high cost, the invention provides a non-contact automatic calculation of the number of axles in multiple lanes Method, based on the lidar data, using the principle of diffuse reflection on the surface of the traveling vehicle irradiated on the lane, calculate the height and lateral coordinates of the traveling vehicle at each rotation angle, and then construct the three-dimensional model of the vehicle, extract the single vehicle data, and realize the calculation of the number of vehicle axles. Improve the accuracy of vehicle classification

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  • Multi-lane non-contact axle number automatic calculation method and system
  • Multi-lane non-contact axle number automatic calculation method and system
  • Multi-lane non-contact axle number automatic calculation method and system

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Embodiment 1

[0068] The trigger time of the vehicle passing the second laser sensor is 2021-10-20 12:30:200, the trigger time of the vehicle passing the first laser sensor is 2021-10-20 12:30:500, and the distance between the laser trigger lines is 6m. Calculate the vehicle The driving speed V=20m / s, the number of times the vehicle is scanned by the first laser sensor is 16 times, and the calculated vehicle length VL=6.4 meters. According to Table 1, it is preliminarily judged that the vehicle type may be a bus, a medium-sized truck or a large truck, and the number of axles may be 2-axis or 3-axis, when acquiring laser radar data, when the rotation angle of the first laser sensor is 30 degrees, and the distance between the data point where the vehicle body is located and the first laser sensor is 5m, according to the formula (1), the coordinates of the point where the vehicle body is located are respectively x 0 =2.5m,y 0 = 4.33m, if the installation height of the first laser sensor is 6m...

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Abstract

The invention provides a multi-lane non-contact axle number automatic calculation method and system. The method comprises a laser sensor setting scanning step, a laser radar data acquisition step, a single vehicle data separation step and an axle number calculation step. Specifically, based on laser radar data, the height and transverse coordinates of a traveling vehicle at each rotation angle are calculated by using the principle of diffuse reflection of the surface of the traveling vehicle irradiated to a lane, and then a vehicle three-dimensional model is constructed; single vehicle data is extracted, automatic calculation of the number of vehicle axles on multiple lanes is achieved under the non-contact condition, and the accuracy of vehicle type classification is improved.

Description

technical field [0001] The invention relates to the technical field of road traffic investigation equipment, in particular to a method and system for automatically calculating the number of multi-lane non-contact axles based on laser radar data. Background technique [0002] In the "Guiding Opinions on Strengthening the Technical Management of Highway Traffic Situation Investigation Equipment", it is stipulated that the technical index data uploaded by traffic situation investigation equipment (hereinafter referred to as "interchange equipment") includes: vehicle classification, traffic flow, vehicle speed at location, headway, Seven kinds of traffic parameters such as distance between vehicles, time occupancy rate, following vehicle percentage, etc. The classification of vehicle types is based on the "Notice on Adjusting the Classification and Conversion Coefficients of Vehicle Types in the Survey of Highway Traffic Situation", see Table 1, and the relative error of single-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/10G06F17/16G06F30/15G06T17/00G06K9/62G01D21/02
CPCG06F17/10G06F17/16G06T17/00G06F30/15G01D21/02G06F18/241
Inventor 王军群刘俊袁彬杨东烨
Owner COSCO SHIPPING TECH CO LTD
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