CN-121985457-A - Layout position measuring and calculating method for vehicle detection equipment of tunnel intelligent dimming control system

CN121985457ACN 121985457 ACN121985457 ACN 121985457ACN-121985457-A

Abstract

The invention discloses a method for measuring and calculating the layout position of vehicle detection equipment for a tunnel intelligent dimming control system. The method comprises the steps of obtaining the driving speed of a vehicle in the process of approaching and entering a tunnel from the upstream of the tunnel, determining a first critical safe visual field distance which is not influenced by the dark environment of the tunnel entrance within the visual field range of a driver of the vehicle, obtaining the response time of an intelligent dimming control system, determining the response distance according to the driving speed and the response time, and determining the arrangement distance of the vehicle detection equipment from the tunnel entrance according to the first critical safe visual field distance and the response distance. The invention provides a layout position determining scheme of vehicle detection equipment, which can guide the layout of the vehicle detection equipment to assist intelligent dimming control of a tunnel, so that the driving safety and comfort of a driver are ensured, the energy consumption waste is avoided, and the energy-saving requirement and the safety requirement are effectively balanced.

Inventors

HU JIANGBI
WANG RONGHUA
ZHANG ZECHAO

Assignees

北京工业大学

Dates

Publication Date: 20260505
Application Date: 20260115

Claims (10)

1. The method for measuring and calculating the layout position of the vehicle detection equipment for the tunnel intelligent dimming control system is characterized by comprising the following steps of: s110, acquiring the driving speed of the vehicle in the process of approaching and driving into the tunnel from the upstream of the tunnel; S120, determining a first critical safe visual field distance which is not influenced by the dark environment of a tunnel portal in the visual field range of a vehicle driver in the driving process; s130, acquiring response time from detection of vehicle information to completion of preset illumination brightness adjustment of the intelligent dimming control system; s140, determining the response distance of the vehicle running in the response time according to the running speed and the response time, and And S150, determining the arrangement distance of the vehicle detection equipment from the tunnel portal according to the first critical safe visual field distance and the response distance.
2. The measuring method according to claim 1, wherein the step S120 includes: s121, collecting the running speed in real time at least in a tunnel brightness change influence region; s122, analyzing the change characteristic of the running speed to determine a first critical position where the running speed is reduced for the first time, and S123, determining the distance between the first critical position and the tunnel portal as the first critical safe visual field distance.
3. The method according to claim 2, wherein said step S121 includes S1211 of collecting said traveling speeds for a plurality of drivers, respectively; the step S122 includes: S1221, determining a mean value of running speeds of a plurality of different acquisition positions, wherein at least part of the acquisition positions are located in a tunnel brightness change influence region; S1222, constructing a relation curve between the position and the running speed according to the average value of the plurality of different acquisition positions and the running speed; s1223, a first critical position in the relation curve, in which the first occurrence of the reduction of the driving speed is recognized, wherein the first critical position corresponds to the first critical safety visual field distance.
4. The method according to claim 2, wherein said step S121 includes S1211 of collecting said traveling speeds for a plurality of drivers, respectively; the step S122 includes: S1221, determining a mean value of running speeds of a plurality of different acquisition positions, wherein at least part of the acquisition positions are located in a tunnel brightness change influence region; S1222, constructing a relation curve between the position and the running speed according to the average value of the plurality of different acquisition positions and the running speed; S1224, identifying two positions in the relation curve, wherein the driving speed of the two positions is reduced most obviously; s1225, determining a position far from the tunnel portal as a first critical position, and determining the other position as a second critical position, wherein the first critical position corresponds to the first critical safe visual field distance, and the second critical position corresponds to a second critical safe visual field distance which is not influenced by the lighting brightness jump environment of the portal in the visual field range of a driver.
5. The measuring method according to claim 1, wherein the step S120 includes: And S120', determining the first critical safe visual field distance according to the running speed through a relation model of the first critical safe visual field distance relative to the running speed, wherein the relation model of the first critical safe visual field distance relative to the running speed represents the relation of the first critical safe visual field distance changing with the running speed.
6. The method of measuring according to claim 5, wherein the first critical safe-view distance-to-travel-speed relationship model is represented by the following formula: L s =av+b Wherein L s is the first critical safe view distance, v is the travel speed, and a and b are constants.
7. The measuring method according to claim 5 or 6, wherein the step S120' includes: S121', respectively acquiring test running speed and corresponding test first critical safe visual field distance for a plurality of different test tunnels, and S122', constructing a relation model of the first critical safe visual field distance relative to the running speed through regression analysis according to the test running speeds acquired by the plurality of test tunnels and the corresponding first critical safe visual field distance; And S123', solving the first critical safe visual field distance through the relation model by using the driving speed.
8. The method according to claim 7, wherein said step S121' comprises, for each of a plurality of initial speeds in each test tunnel, S1211', collecting test running speed in real time at least in a tunnel brightness change influence interval; s1212' analyzing the variation characteristic of the test running speed to determine a test first critical position at which a first reduction of the test running speed occurs, and And S1213', determining the distance between the first critical position of the test and the tunnel portal of the test as the first critical safe visual field distance of the test.
9. The method according to claim 8, wherein the step S1211' includes collecting test running speeds for a plurality of drivers, respectively; the step S1212' includes: s12121', determining a mean value of test running speeds of a plurality of different acquisition positions, wherein at least part of the acquisition positions are located in a tunnel brightness change influence interval; S12122' constructing a relationship curve between the position and the test running speed based on the plurality of different acquisition positions and the average of the test running speed, and And S12123', identifying a first test critical position of the first occurrence of the reduction of the test running speed in the relation curve, wherein the first test critical position corresponds to a first critical safety visual field distance.
10. The method according to claim 8, wherein the step S1211' includes collecting test running speeds for a plurality of drivers, respectively; the step S1212' includes: s12121', determining a mean value of test running speeds of a plurality of different acquisition positions, wherein at least part of the acquisition positions are located in a tunnel brightness change influence interval; S12122', constructing a relation curve between the position and the test running speed according to the plurality of different acquisition positions and the average value of the test running speed; S12124', identifying two positions in the relation curve, wherein the reduction of the test running speed is most obvious; And S12125', determining a position far from the tunnel portal as a first test critical position, and determining the other position as a second test critical position, wherein the first test critical position corresponds to a first critical safe visual field distance, and the second test critical position corresponds to a second critical safe visual field distance which is not influenced by the illumination brightness jump environment of the tunnel portal in the visual field range of a driver.

Description

Layout position measuring and calculating method for vehicle detection equipment of tunnel intelligent dimming control system Technical Field The invention relates to the technical field of highway tunnel illumination, in particular to a method for measuring and calculating the layout position of vehicle detection equipment for a tunnel intelligent dimming control system. Background Currently, in order to achieve the purpose of tunnel illumination energy saving, more and more tunnels use intelligent dimming control systems, wherein the intelligent dimming control systems integrate brightness detection equipment, vehicle detection equipment, illumination lamps with dimming functions and corresponding control algorithms, and perform tunnel illumination control by adopting an on-demand illumination strategy. However, although related researches are performed on functional requirements, system construction and the like of the intelligent dimming control system in the prior art, researches on a layout scheme of vehicle detection equipment in the intelligent dimming control system are seldom seen. Accordingly, there is still room for improvement in this field. Currently, the prior art is mainly focused on research on intelligent dimming control systems or lighting control methods. Chinese patent CN116056275A discloses a submarine tunnel intelligent dimming system based on 5G transmission, including monitor platform, still include 5G basic station, 5G signal receiver, single lamp controller, the control box that adjusts luminance, 5G signal receiver installs in lighting fixture and the control box that adjusts luminance, single lamp controller installs in lighting fixture, realizes 0% -100% electrodeless dimming of lighting fixture according to the control box command that adjusts luminance, the control box that adjusts luminance passes through 5G signal connection with monitor platform, be provided with the controller that gathers every terminal equipment signal in the submarine tunnel in the control box that adjusts luminance to upload the acquisition signal to monitor platform. The Chinese patent CN104470139A discloses a tunnel illumination closed-loop feedback control method, which comprises the following steps of S1, collecting brightness information, traffic flow information, vehicle speed information and vehicle presence information inside and outside a tunnel, S2, calculating set brightness values required by each road section inside the tunnel according to the data information and highway tunnel illumination design rules collected in S1, S3, obtaining an image of the road surface inside the tunnel by a camera, calculating actual illuminance values of each point inside the tunnel and illuminance distribution conditions of the whole road surface based on image gray scales, S4, carrying out PID closed-loop feedback adjustment according to the set brightness values and the actual illuminance values, judging whether the actual output brightness of a lamp inside the tunnel meets the requirements or not, if not, calculating a new brightness value, converting the brightness value output after PID closed-loop feedback adjustment into brightness control level information of the lamp inside the tunnel, S5, converting a brightness control level command signal of the lamp into a corresponding pulse signal by adopting a dimming controller, and adjusting the output brightness value of the lamp inside the tunnel in a PWM dimming mode. The description of the background art is only for the purpose of facilitating an understanding of the relevant art and is not to be taken as an admission of prior art. Disclosure of Invention Accordingly, embodiments of the present invention aim to provide a solution that can at least partially solve the above-described problems. In a first aspect, an embodiment of the present invention provides a method for measuring and calculating a layout position of a vehicle detection device for a tunnel intelligent dimming control system, which may include: s110, acquiring the driving speed of the vehicle in the process of approaching and driving into the tunnel from the upstream of the tunnel; S120, determining a first critical safe visual field distance which is not influenced by the dark environment of a tunnel portal in the visual field range of a vehicle driver in the driving process; s130, acquiring response time from detection of vehicle information to completion of preset illumination brightness adjustment of the intelligent dimming control system; s140, determining the response distance of the vehicle running in the response time according to the running speed and the response time, and And S150, determining the arrangement distance of the vehicle detection equipment from the tunnel portal according to the first critical safe visual field distance and the response distance. In some embodiments, the step S120 includes: s121, collecting the running speed in real time at least in a tunnel brigh