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Construction, diagnosis method and system of safety evaluation model for continuous longitudinal slope section

A technology for safety evaluation and road section, applied in character and pattern recognition, data processing application, prediction, etc.

Active Publication Date: 2022-06-21
SICHUAN DEPT OF TRANSPORTATION HIGHWAY PLANNING PROSPECTING & DESIGN RES INST
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  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to solve the problem that there is no mature technology in the prior art to detect and evaluate the safety of the two slope sections, and propose a continuous longitudinal slope section safety evaluation model construction, diagnosis method and system, combined with the driver's visual load Strength model, to test the design safety of the straight slope section and the curved slope section of the longitudinal slope section

Method used

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  • Construction, diagnosis method and system of safety evaluation model for continuous longitudinal slope section
  • Construction, diagnosis method and system of safety evaluation model for continuous longitudinal slope section
  • Construction, diagnosis method and system of safety evaluation model for continuous longitudinal slope section

Examples

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Embodiment 1

[0032] Both the gradient and length of the straight slope section of the continuous longitudinal slope section have an impact on the driver's vision. The present invention is based on the driver's visual load intensity model of the continuous longitudinal slope section, and analyzes the relationship between the slope, the slope length of the straight slope section and the driver's visual load intensity. , to establish a model of the relationship between the straight-slope segment alignment and the driver's visual load intensity, which provides a reference for the straight-slope segment alignment design and safety evaluation of continuous longitudinal slopes. To this end, this example provides a method for building a safety evaluation model for a continuous longitudinal slope section, including the following steps:

[0033] Step 1. Select training data and construct a training set.

[0034] In this example, the radius of the horizontal curve is 1000m as the critical value, and ...

Embodiment 2

[0067] The driver's visual load intensity model can be calculated from the driver's visual load intensity model in different road alignment environments. The visual load intensity can represent the driver's psychological stress level. When the road alignment environment is complex and the driver's psychological stress level increases, The corresponding visual load intensity will also increase. Therefore, the driver's visual load intensity can reflect the influence of the road alignment environment on the driver's psychology, thus reflecting the natural guiding ability of the road alignment to the driver, and then reflecting the safety level of the road section. Based on the above theory, this example provides a safety evaluation and diagnosis method for a continuous longitudinal slope section, and constructs the safety evaluation model of the continuous longitudinal slope section in Example 1, which is applied to the linear safety evaluation of the continuous longitudinal slope...

Embodiment 3

[0078] This example provides a safety evaluation system for a continuous longitudinal slope road section, including the safety evaluation model for the continuous longitudinal slope road section in Embodiment 1. The system adopts the safety evaluation and diagnosis method of the continuous longitudinal slope road section provided in the embodiment 2 to realize the linear safety evaluation of the continuous longitudinal slope road section.

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Abstract

The invention relates to a safety evaluation model construction and diagnosis method and system for a continuous longitudinal slope road section. The invention provides a method for constructing a safety evaluation model of a continuous longitudinal slope road section, selects training data, and constructs a training set; divides a continuous longitudinal slope road section into a straight slope section and a curved slope section; constructs a straight slope section regression model and a curved slope section regression model; For straight slopes, select the regression model for straight slopes, take the driver’s visual load intensity as output, and use the slope and length of straight slopes as input, and stop training until the prediction performance reaches the preset value; for curved slopes, Select the regression model of the curved slope section to take the driver's visual load intensity as the output, input the slope of the curved slope section and the angle change rate of the curved section, and stop the training until the prediction performance reaches the preset value; then the safety evaluation of the continuous longitudinal slope section The model building is complete. The relationship model between the driver's visual load intensity and the road alignment index is established to realize the safety evaluation of slope linearity.

Description

technical field [0001] The invention belongs to the field of road safety detection, and in particular relates to a safety evaluation model construction, diagnosis method and system of a continuous longitudinal slope road section. Background technique [0002] Restricted by terrain conditions, mountain expressways are generally faced with the decision-making needs of continuous longitudinal slope design. Many scholars have studied the design safety of continuous longitudinal slope sections. In order to evaluate the driving safety, in the prior art, the change rate of the driver's pupil area, the duration of fixation, and the ratio of the number of fixations and the number of blinks were studied when the driver was driving on a continuous longitudinal slope, and the three drivers' visual The three indicators are comprehensively simplified by the principal component analysis method, and the driver's visual load intensity model of the continuous longitudinal slope section is es...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06Q10/06G06Q10/04G06Q50/26G06K9/62
Inventor 何云勇高建平何恩怀窦浩然孙璐杨昌凤李松青周玉萍
Owner SICHUAN DEPT OF TRANSPORTATION HIGHWAY PLANNING PROSPECTING & DESIGN RES INST
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