Load detection method based on tyre pressure, and bus passenger flow volume computing method and device based on tyre pressure detection

A detection method and technology for buses, applied in the field of transportation, can solve the problems of inability to accurately detect the passenger flow on and off buses, low measurement accuracy, and high system reliability and adaptability

Active Publication Date: 2014-11-05
肖峰
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Problems solved by technology

[0022] The technical problem to be solved by the present invention is to provide a load detection method based on tire pressure in view of the complex problem of tire pressure and load model establishment in the prior art, and to calculate the tire internal pressure and radial The functional relationship of the load; further, in view of the complex problem that the existing technology cannot accurately detect the passenger flow of the bus, the present invention also establishes a method and device for calculating the passenger flow of the bus based on tire pressure detection, based on the tire pressure and load. Functional relationship, more accurate estimation of changes in passenger flow of buses, helps to optimize bus dispatching and rational planning of bus resources, achieve the effect of energy saving and emission reduction, and solve the traditional problems of bus IC cards and active infrared counters in the prior art. The measurement accuracy is not high, and the cost is relatively low, and the system reliability and adaptability are high

Method used

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  • Load detection method based on tyre pressure, and bus passenger flow volume computing method and device based on tyre pressure detection
  • Load detection method based on tyre pressure, and bus passenger flow volume computing method and device based on tyre pressure detection
  • Load detection method based on tyre pressure, and bus passenger flow volume computing method and device based on tyre pressure detection

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Experimental program
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Effect test

Embodiment 1

[0177] Embodiment 1: A load detection method based on tire pressure includes:

[0178] Step 1: Assume that the cross section of the experimental tire inner tube is a circular regular ring, R is the outer radius of the experimental tire inner tube, and r is the inner radius of the experimental tire inner tube; the ground contact surface formed by the experimental tire inner tube and the ground contact part after loading, the ground contact surface It is a rectangle with length l and width w, where w is assumed to be the width of the tire (that is, it is assumed that the width of the tire is completely grounded), and the angle formed between the center of the experimental tire and the two edges of the rectangle length l is α. According to the principle of action force and reaction force, the internal pressure of the tire and the support force of the bottom surface of the tire, that is, the load:

[0179] M=PC(1);

[0180] At the same time C = lw (2);

[0181] Wherein, P is the...

Embodiment 2

[0211] Embodiment two: in step 2 The calculation process is:

[0212] Step 2.1: Set the angle between the two edges of the contact length between the inner tube of the experimental tire and the ground at no-load to be α 0 , the area of ​​the triangle formed by the inner tube of the experimental tire is The fan-shaped area of ​​the corresponding experimental tire inner tube before loading is Therefore, the volume change of the tire when no load is:

[0213] V 0 = V ‾ - ( α 0 R 2 2 - R 2 2 sin α 0 ) w

[0214] In the same way, when there a...

Embodiment 3

[0216] Embodiment three: in the step 2 The calculation process is:

[0217] Step 2.2: In the case of passengers, the angle α between the two edges of the contact length between the inner tube of the experimental tire and the ground is α 1 , the area of ​​the triangle formed by the inner tube of the experimental tire is The fan-shaped area of ​​the corresponding experimental tire inner tube before loading is Therefore, the volume change of the tire when there are passengers:

[0218] V 1 = V ‾ - ( α 1 R 2 2 - R 2 2 sin α 1 ) w

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Abstract

The invention relates to the technical field of traffic transportation, in particular to a load detection method based on tyre pressure, and a bus passenger flow volume computing method and device based on tyre pressure detection. The bus passenger flow volume computing method and device based on tyre pressure detection solve the complex problem that the volume of passengers getting on and getting off a bus can not be accurately detected in the prior art, changes of the passenger flow volume are estimated more accurately on the basis of the functional relation between tyre pressure and a load, optimized dispatching of the bus and reasonable programming of bus resources are facilitated, and the effects of energy conservation and emission reduction are achieved. The relation between the gas volume change and the pressure intensity change is obtained by analyzing stress on tyres of the bus and the ground, the relation between the load delta M and the current tyre pressure P1 is solved finally, then a model of the relation between the carrying capacity and the passenger capacity of the bus is built, and consequently the relation between the tyre pressure change and the passenger capacity change is obtained.

Description

technical field [0001] The invention relates to the technical field of transportation, in particular to a tire pressure-based load detection method, a tire pressure detection-based bus passenger flow calculation method and a device. Background technique [0002] The focus of the Chinese patent CN201010220948.X is on the load analysis of trucks, mainly through the analysis of the truck's center of gravity and the change of tire pressure to realize the estimation of the truck's load. The function model in this patent is a simple model in which the internal pressure of the tire and the radial load approximately have a linear relationship, the accuracy is not high, and it is mainly aimed at the load of the truck. There is no effective model establishment for the bus load. There is also no relationship model between the number of passengers and the load of the bus. [0003] Buses are an important means of public transportation for people to travel. Through the statistics of bus...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01G19/02
Inventor 肖峰沈旻宇涂雯雯郑梦雷
Owner 肖峰
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