CN110662330A - Tunnel lamp dimming and color mixing method based on light induction and vehicle detection - Google Patents
Tunnel lamp dimming and color mixing method based on light induction and vehicle detection Download PDFInfo
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Abstract
The invention discloses a tunnel lamp dimming and color mixing method based on light induction and vehicle detection, which comprises an upper computer, a controller, a direct current amplifier, a brightness detector, an infrared camera detector, a color temperature detector and an LED tunnel lamp group, and specifically adopts the following steps to adjust the light color in a tunnel: s1 detecting the light environment outside the tunnel; s2, detecting vehicle information outside the tunnel: the vehicle information includes the train number and the vehicle speed; s3, the signals detected by the brightness detector, the color temperature detector and the infrared camera detector in the steps S1 and S2 are input into the controller through A/D conversion and a current amplifier; and the S4 controller outputs digital quantity according to the collected signals, and converts the digital quantity into direct-current voltage signals to regulate and control the LED tunnel lamp group. The invention reduces the loss of electric energy, prolongs the service life of the tunnel lamp, reduces the influence of the 'white hole' and 'black hole' effect on a driver and improves the driving safety.
Description
Technical Field
The invention relates to the technical field of highway tunnel lighting, in particular to a tunnel lamp dimming and color mixing method based on light induction and vehicle detection.
Background
At present, the high-pressure sodium lamp is mostly adopted for tunnel illumination in China, the high-pressure sodium lamp is the most used light source in the current highway tunnel illumination, the service life is long, the luminous efficiency is high, and the fog penetration performance is good, but the high-pressure sodium lamp belongs to a gas light source, the high-pressure sodium lamp needs time for turning on and off, a certain time is needed for turning on and off the high-pressure sodium lamp, and the high-pressure sodium lamp cannot be turned on and off too frequently. And the high-pressure sodium lamp has many defects in the aspects of color rendering property, radiation form, power specification, visual sensitivity, intelligent brightness control, energy conservation and the like. The high-pressure sodium lamp lighting system generally has only 3-5 level polar regulation, and the change of vehicle flow in the tunnel is large, and the brightness of the high-pressure sodium lamp cannot be frequently regulated, so that partial waste of energy is caused. In recent years, the intelligent energy-saving technology for the high-pressure sodium lamp is applied to a certain extent, such as an energy-saving controller for the high-pressure sodium lamp, a variable power adjusting method and the like, but practice proves that the methods have unobvious energy-saving effect, limited adjusting and controlling range, low cost performance and great improvement potential.
The tunnel lighting is not only related to indexes such as driving speed and traffic flow allowed by the tunnel, but also closely related to natural geographical conditions such as the position, the brightness outside the tunnel, the color temperature and the like of the tunnel, so that the tunnel lamp can provide the lighting brightness and the color temperature which are suitable for the tunnel, namely the lighting facility has the functions of dimming and color mixing, and therefore, an intelligent and effective adjusting mode of the brightness and the color temperature of the lamp in the tunnel is necessary.
Disclosure of Invention
The invention aims to provide a tunnel lamp dimming and color mixing method based on light induction and vehicle detection, which can solve one or more of the technical problems.
In order to achieve the purpose, the technical scheme provided by the invention is as follows:
the tunnel lamp dimming and color mixing method based on light induction and vehicle detection comprises an upper computer, a controller, a direct current amplifier, a brightness detector, an infrared camera detector, a color temperature detector and an LED tunnel lamp group,
the method specifically comprises the following steps of:
s1 detecting the light environment outside the tunnel: the illumination intensity in the daytime outside the tunnel is detected by a brightness detector, and the color temperature outside the tunnel is detected by a color temperature detector.
S2, detecting vehicle information outside the tunnel: the vehicle information comprises the number of vehicles and the speed of the vehicles, the infrared camera detector is used for detecting the speed of the vehicles and the number of vehicles, and the method specifically comprises the following steps:
s21 preprocessing of vehicle image: graying the image, and then carrying out median filtering and denoising on the image to obtain a preprocessed image;
s22 detection and counting: judging whether a vehicle exists or not by adopting a background frame difference method, taking an image without the vehicle passing through as a background picture, carrying out difference on the current picture and the background picture, and calling a pixel matched with a background model as a background pixel bk(x, y), the unmatched pixels are called foreground pixels fk(x, y), dividing by a threshold value T to obtain a binary image of the target: dk(x,y)＝|fk(x,y)-bk(x,y)|，
Calculating the number of the traveling vehicles by adopting an adjacent frame difference method:
dn(x,y)＝|fn(x,y)-fn-1(x,y)|，
the counting result of the detection object in unit time is the number of the traveling vehicles passing through the detection point;
s23 vehicle speed calculation: the method comprises the following steps of calculating the traffic speed of a vehicle by adopting a video object extraction algorithm combining background difference and frame difference: selecting a group of feature points with unchanged shape in motion from one frame image, matching with the same type of feature points in the next adjacent frame, calculating the motion time of the vehicle according to the displacement of the feature points in the two adjacent frame images, and calculating the motion time of the vehicle according to the displacement Dn(x, y) and time t, the vehicle speed can be calculated as follows:
due to the displacement Dn(x,y)＝|In(x,y)-In-1(x, y) |, and thus vehicle speed
The vehicle information processed by the infrared camera detector in the step S2 is accurate and reliable, accurate adjustment information can be provided for a controller (PLC), and the processing steps are simple, the calculation amount is small, and the vehicle information can be provided more quickly. The processing method of the vehicle information is applied to the process of adjusting the color temperature and the brightness of the tunnel lamp for the first time, so that the light environment in the tunnel is adjusted more reasonably, intelligently and scientifically.
S3, the signals detected by the brightness detector, the color temperature detector and the infrared camera detector in the steps S1 and S2 are input into the controller through A/D conversion and a current amplifier;
and the S4 controller outputs digital quantity according to the collected signals, and converts the digital quantity into direct-current voltage signals to regulate and control the LED tunnel lamp group.
Further, in step S3, the controller receives the information of step S1 at a frequency of once every ten minutes. And the method is used for updating and adjusting the parameters of the tunnel lamp group in time.
Further, the controller is a PLC.
Furthermore, the tunnel lamp set is a color temperature-variable LED tunnel lamp set. Its colour temperature is the condition of the outer colour temperature of tunnel that detects according to the colour temperature detector and changes, and the colour temperature detector needs the outer colour temperature check value of tunnel to PLC transmission once every ten minutes, and when the outer colour temperature level of tunnel is lower when the lower fog of visibility, the light source of tunnel banks converts the low colour temperature light source of yellow type into, and the penetrability of reinforcing illumination light reduces the difference of the inside and outside colour temperature in tunnel and color rendering index, is favorable to driving to look and thinks, improves driving safety.
Further, the system also comprises an upper computer, and the upper computer is connected with the controller through the Ethernet for communication.
Further, the upper computer is a computer and/or a mobile phone.
The invention has the technical effects that:
the invention combines the detected vehicle information processed by the infrared camera detector, detects the environment information outside the tunnel through the brightness detector and the color temperature detector, and processes the acquired signals by taking the PLC as a core, thereby controlling the lighting equipment and finally realizing the intelligent control of lighting.
The adjusting method reduces the loss of electric energy, prolongs the service life of the tunnel lamp, reduces the influence of the 'white hole' and 'black hole' effect on a driver and improves the driving safety. In addition, the PLC is connected with the upper computer through the Ethernet, so that the remote intelligent regulation and control are realized.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention.
In the drawings:
fig. 1 is a hardware architecture diagram of a tunnel lamp dimming and toning method based on light sensing and vehicle detection according to the present invention.
Fig. 2 is a flow chart of a tunnel lamp dimming and color-adjusting method based on light induction and vehicle detection according to the invention.
Detailed Description
The present invention will now be described in detail with reference to the drawings and specific embodiments, wherein the exemplary embodiments and descriptions are provided only for the purpose of illustrating the present invention and are not to be construed as unduly limiting the invention.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
As shown in fig. 1, a tunnel lamp dimming and color mixing method based on light induction and vehicle detection includes a controller (PLC), a dc current amplifier, a brightness detector, an infrared camera detector, a color temperature detector, and an LED tunnel lamp set (color temperature variable LED tunnel lamp set).
As shown in fig. 2, the system starts a self-check, and turns on a brightness detector for detecting the daytime illumination intensity outside the tunnel, a color temperature detector for detecting the color temperature outside the tunnel, and an infrared camera detector.
The brightness detector needs to transmit the detection value of the daytime illumination intensity outside the tunnel to a controller (PLC) every ten minutes for timely updating and adjusting the parameters of the tunnel lamp group.
The LED tunnel lamp set is a color temperature-variable LED tunnel lamp set, the color temperature of the LED tunnel lamp set is changed according to the condition of the external color temperature of the tunnel detected by the color temperature detector, and the color temperature detector also needs to transmit the detected value of the external color temperature of the tunnel to a controller (PLC) once every ten minutes.
If the colour temperature level is lower outside the tunnel during like the lower fog of visibility, the light source of tunnel banks converts the low colour temperature light source of yellow type into, and the penetrability of reinforcing illumination light reduces the difference of inside and outside colour temperature in tunnel and color rendering index, is favorable to driving to look at and thinks, improves driving safety.
The infrared camera detector is used for detecting whether a vehicle exists, the speed of the vehicle and the number of the vehicles. The infrared camera detector is arranged outside the tunnel portal and has a certain distance with the tunnel portal, and the image processing of the acquired video information by the infrared camera detector specifically comprises the following steps:
s21 preprocessing of vehicle image: graying the image, and then carrying out median filtering and denoising on the image to obtain a preprocessed image;
s22 detection and counting: judging whether a vehicle exists or not by adopting a background frame difference method, taking an image without the vehicle passing through as a background picture, carrying out difference on the current picture and the background picture, and calling a pixel matched with a background model as a background pixel bk(x, y), the unmatched pixels are called foreground pixels fk(x, y), dividing by a threshold value T to obtain a binary image of the target:
dk(x,y)＝|fk(x,y)-bk(x,y)|，
calculating the number of the traveling vehicles by adopting an adjacent frame difference method:
dn(x,y)＝fn(x,y)-fn-1(x,y)|，
the counting result of the detection object in unit time is the number of the traveling vehicles passing through the detection point;
s23 vehicle speed calculation: the method comprises the following steps of calculating the traffic speed of a vehicle by adopting a video object extraction algorithm combining background difference and frame difference: selecting a group of feature points with unchanged shape in motion from one frame image, matching with the same type of feature points in the next adjacent frame, calculating the motion time of the vehicle according to the displacement of the feature points in the two adjacent frame images, and calculating the motion time of the vehicle according to the displacement Dn(x, y) and time t, the vehicle speed can be calculated as follows:
due to the displacement Dn(x,y)＝|In(x,y)-In-1(x, y) |, and thus vehicle speed
The brightness detection, the color temperature detector and the infrared camera detector perform A/D conversion on detected signals, then the detected signals pass through the current amplifier and are input into the controller (PLC), and the controller (PLC) outputs digital quantity according to the collected signals and converts the digital quantity into direct-current voltage signals to perform electrodeless regulation and control on the LED lamp.
In addition, the tunnel lighting lamp group remote control system also comprises an upper computer (a computer and/or a mobile phone), wherein the upper computer is connected and communicated with the controller (PLC) through the Ethernet, so that the remote control of the lighting lamp group in the tunnel can be realized.
The invention combines the indexes of the tunnel lighting, the driving speed, the traffic flow and the like allowed by the tunnel, and also combines the information related to the natural geographic conditions such as the orientation of the tunnel, the brightness outside the tunnel, the color temperature and the like, and provides an effective and intelligent adjusting method of the tunnel lighting system, so that the tunnel lamp set can provide the lighting brightness and the color temperature which are adaptive to the information, the loss of electric energy is reduced, the service life of the tunnel lamp is prolonged, the influence of the white hole effect and the black hole effect on a driver is reduced, and the driving safety is improved.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. The tunnel lamp dimming and color mixing method based on light induction and vehicle detection is characterized by comprising a controller, a direct current amplifier, a brightness detector, an infrared camera detector, a color temperature detector and an LED tunnel lamp group,
the method specifically comprises the following steps of:
s1 detecting the light environment outside the tunnel: detecting the illumination intensity outside the tunnel in the daytime by using a brightness detector, and detecting the color temperature outside the tunnel by using a color temperature detector;
s2, detecting vehicle information outside the tunnel: the vehicle information comprises the number of vehicles and the speed of the vehicles, the infrared camera detector is used for detecting the speed of the vehicles and the number of vehicles, and the method specifically comprises the following steps:
s21 preprocessing of vehicle image: graying the image, and then carrying out median filtering and denoising on the image to obtain a preprocessed image;
s22 detection and counting: judging whether a vehicle exists or not by adopting a background frame difference method, taking an image without the vehicle passing through as a background picture, carrying out difference on the current picture and the background picture, and calling a pixel matched with a background model as a background pixel bk(x, y), the unmatched pixels are called foreground pixels fk(x, y), dividing by a threshold value T to obtain a binary image of the target: dk(x,y)＝|fk(x,y)-bk(x,y)|，
Calculating the number of the traveling vehicles by adopting an adjacent frame difference method:
dn(x,y)＝|fn(x,y)-fn-1(x,y)|，
the counting result of the detection object in unit time is the number of the traveling vehicles passing through the detection point;
s23 vehicle speed calculation: the method comprises the following steps of calculating the traffic speed of a vehicle by adopting a video object extraction algorithm combining background difference and frame difference: selecting a group of feature points with unchanged shape in motion from one frame image, matching with the same type of feature points in the next adjacent frame, calculating the motion time of the vehicle according to the displacement of the feature points in the two adjacent frame images, and calculating the motion time of the vehicle according to the displacement Dn(x, y) and time t, the vehicle speed can be calculated as follows:
due to the displacement Dn(x,y)＝|In(x,y)-In-1(x, y) |, and thus vehicle speed
S3, the signals detected by the brightness detector, the color temperature detector and the infrared camera detector in the steps S1 and S2 are input into the controller through A/D conversion and a current amplifier;
and the S4 controller outputs digital quantity according to the collected signals, and converts the digital quantity into direct-current voltage signals to regulate and control the LED tunnel lamp group.
2. The light sensing and vehicle detection based tunnel lamp dimming and toning method according to claim 1, wherein in step S3, the controller receives the information of step S1 at a frequency of once every ten minutes.
3. The light sensing and vehicle detection based tunnel lamp dimming and toning method according to claim 1, wherein the controller is a PLC.
4. The light sensing and vehicle detection based tunnel lamp dimming and color adjusting method according to claim 1, wherein the tunnel lamp set is a color temperature changing LED tunnel lamp set.
5. The light sensing and vehicle detection based tunnel lamp dimming and color adjusting method according to claim 1, further comprising an upper computer, wherein the upper computer is in communication with the controller through an Ethernet connection.
6. The light sensing and vehicle detection based tunnel lamp dimming and color adjusting method according to claim 5, wherein the upper computer is a computer and/or a mobile phone.
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