CN104470139A - Tunnel lighting closed-loop feedback control method and system - Google Patents
Tunnel lighting closed-loop feedback control method and system Download PDFInfo
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- CN104470139A CN104470139A CN201410772025.3A CN201410772025A CN104470139A CN 104470139 A CN104470139 A CN 104470139A CN 201410772025 A CN201410772025 A CN 201410772025A CN 104470139 A CN104470139 A CN 104470139A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
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Abstract
The invention discloses a tunnel lighting closed-loop feedback control method and system. The method includes the following steps that S1, brightness information, traffic flow information, vehicle speed information and vehicle existence information inside and outside a tunnel are collected; S2, according to the data information collected in S1 and road tunnel lighting design details, set brightness values needed for all road sections inside the tunnel are calculated; S3, an image of a road surface inside the tunnel is obtained through a camera, and actual illumination values of all points inside the tunnel and the illumination distribution condition of the whole road surface are calculated based on the grey scale of the image; S4, PID closed-loop feedback adjustment is performed according to the set brightness values and the actual illumination values, whether the actual output brightness of lamps inside the tunnel at the present meets the requirement or not is judged, if not, new brightness values are calculated, and the brightness values output after the PID closed-loop feedback adjustment are converted into control order information of brightness of the lamps inside the tunnel; S5, a dimming controller converts an order command signal of the brightness of the lamps into a corresponding pulse signal, and the output brightness values of the lamps inside the tunnel are adjusted through a PWM dimming mode.
Description
Technical field
The present invention relates to intraoral illumination control technology field, tunnel, particularly relate to a kind of tunnel illumination closed-loop feedback control method and control system.
Background technology
Existing tunnel illumination control mode, be all that the light fixture controlled in tunnel according to certain requirement provides certain brightness to tunnel, brightness symbol is undesirable can not be measured by real-time carrying out.
And in road lighting industry at home, the measurement of road lighting is mainly for the measurement of brightness, illumination, traditional brightness and illumination photometry method are point-to-point metering systems, be a certain size rectangular mesh by measured pavement section, the brightness at the summit place of each grid measured successively by the hand-held luminance meter of survey crew.Point-to-point method of measurement process is loaded down with trivial details, and can not have vehicular traffic in measuring process, and serious hinders normal traffic operation.And point-to-point measurement brightness (illumination) can only Timing measurement brightness (illumination), the requirement of measuring in real time can not be met.
In the actual operation process in tunnel, if tunnel lamp damages or tunnel brightness all can be caused not reach requirement due to reasons such as light decays, therefore, the actual illumination of Real-Time Monitoring tunnel internal, makes the illumination requirement of the satisfied reality that the illumination in tunnel can be real-time significant.
Summary of the invention
According to prior art Problems existing, the invention discloses a kind of tunnel illumination closed-loop feedback control method, comprise the following steps:
S1: inside and outside gathering Tunnel, monochrome information, information of vehicle flowrate, vehicle speed information and vehicle are with or without information;
S2: calculate the setting brightness value in Tunnel required for each section according to the data message collected in S1 and highway tunnel illumination design details;
S3: obtain tunnel internal pavement image by video camera, calculate the Illumination Distribution situation on the actual brightness value of tunnel internal each point and whole road surface based on gradation of image, simultaneous camera can also detect in hole information such as whether having in stoppage of vehicle or car accident, hole whether breaking out of fire;
S4: carry out the adjustment of PID closed loop feedback according to the brightness value set and actual brightness value, judge in current tunnel hole, whether the actual output brightness of light fixture satisfies the demands, if do not met, calculate the brightness value that makes new advances, convert the brightness value exported after PID closed loop feedback regulates in tunnel lamp brightness construction quality information;
S5: adopt light adjusting controller the brilliance control grade command signal of light fixture to be converted to corresponding pulse signal, by the output brightness value of light fixture in PWM dimming mode adjustment tunnel.
A kind of tunnel illumination closed-loop feedback control system, comprising: gathering vehicle speed information, information of vehicle flowrate, vehicle in tunnel has asemantic vehicle information collection unit;
Gather the environment information acquisition unit of visibility information inside and outside the luminance of outer caves information, hole monochrome information, hole in tunnel;
Real-time Obtaining tunnel internal pavement image, calculate the illumination Real-Time Monitoring unit of the Illumination Distribution situation on the actual brightness value of tunnel internal each point and whole road surface based on gradation of image, described monitoring means can also detect in hole information such as whether having in stoppage of vehicle or car accident, hole whether breaking out of fire;
Receive the data message that described vehicle information collection unit, environment information acquisition unit and illumination Real-Time Monitoring unit transmit, and calculate the host computer of the brightness value set required for each section in hole according to the data message collected and highway tunnel illumination design details;
The actual brightness value that the brightness value set required for each section that host computer calculates and illumination Real-Time Monitoring unit calculate carries out the PID regulation unit of PID closed loop feedback adjustment, described PID regulation unit runs in host computer, and host computer converts the brightness value that PID regulation unit exports in tunnel lamp brightness construction quality information;
The light adjusting controller of lamp brightness construction quality information in the tunnel that reception host computer transmits, the brilliance control grade command signal of light fixture is converted to corresponding pulse signal by described light adjusting controller, by the output brightness value of light fixture in PWM dimming mode adjustment tunnel.
Owing to have employed technique scheme, a kind of tunnel illumination closed-loop feedback control system method provided by the invention and control system, by gather brightness inside and outside hole, vehicle flowrate, the speed of a motor vehicle, vehicle with or without etc. information, according to each section of brightness settings in existing proper calculation hole; The illumination real-time monitoring system of the composition of illuminance meter in video camera and hole is utilized to measure actual illumination in tunnel in real time.Then adopt a kind of control method of closed loop feedback, brightness adjustment is carried out to all light fixtures in tunnel, make the illumination in tunnel can meet the demand of actual illumination, optimize the safe operation of illuminator.
Tunnel illumination closed-loop feedback control method provided by the invention, utilize video camera to carry out Real-Time Monitoring to the illumination in tunnel, PID is utilized to regulate the lighting illumination intensity controlled in real time in tunnel, make the illumination requirement of the satisfied reality that the illumination in tunnel can be real-time, optimize the safe operation of illuminator, avoid the illumination decay that damage and light decay due to light fixture bring, thus reduce the generation of traffic accident.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present application or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, the accompanying drawing that the following describes is only some embodiments recorded in the application, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the flow chart of a kind of tunnel illumination closed-loop feedback control method in the present invention;
Fig. 2 is the flow chart of a kind of tunnel illumination closed-loop feedback control method in the present invention
Fig. 3 is the simulation schematic diagram of the tunnel illumination supervisory control system of building in the present invention;
Fig. 4 is the structural representation of a kind of tunnel illumination closed-loop feedback control system in the present invention;
Fig. 5 is the schematic diagram of planting embodiment in the tunnel illumination closed-loop feedback control system course of work in the present invention.
Embodiment
For making technical scheme of the present invention and advantage clearly, below in conjunction with the accompanying drawing in the embodiment of the present invention, clear complete description is carried out to the technical scheme in the embodiment of the present invention:
A tunnel illumination closed-loop feedback control method as depicted in figs. 1 and 2, comprises the following steps:
S1: inside and outside gathering Tunnel, monochrome information, information of vehicle flowrate, vehicle speed information and vehicle are with or without information;
S2: calculate the setting brightness value in Tunnel required for each section according to the data message collected in S1 and highway tunnel illumination design details;
S3: obtain tunnel internal pavement image by video camera, calculate the Illumination Distribution situation on the actual brightness value of tunnel internal each point and whole road surface based on gradation of image, simultaneous camera can also detect in hole information such as whether having in stoppage of vehicle or car accident, hole whether breaking out of fire;
S4: carry out the adjustment of PID closed loop feedback according to the brightness value set and actual brightness value, judge in current tunnel hole, whether the actual output brightness of light fixture satisfies the demands, if do not met, calculate the brightness value that makes new advances, convert the brightness value exported after PID closed loop feedback regulates in tunnel lamp brightness construction quality information;
S5: adopt light adjusting controller the brilliance control grade command signal of light fixture to be converted to corresponding pulse signal, by the output brightness value of light fixture in PWM dimming mode adjustment tunnel.
Highway tunnel illumination design details is: on July 14th, 2014, Department of Transportation of the People's Republic of China (PRC) issued, and " the highway tunnel illumination design details JTG/T D70/2-01-2014 " that implement on August 1st, 2014.
Embodiment: above-mentioned a kind of tunnel illumination closed-loop feedback control method specific implementation process is:
S1, the luminance of outer caves L can be directly detected by the luminance of outer caves meter, Infrared Detectors, coil vehicle detector
20(S), vehicle flowrate, the speed of a motor vehicle, vehicle are with or without information.By the information gathered according to proper calculation brightness value.
S2, according to highway tunnel illumination design details, entrance is divided into two illumination stage, and the computing formula of brightness corresponding is with it:
Wherein k is entrance brightness reduction coefficient, and the value of k can according to table 4.1.1 value in " highway tunnel illumination design details JTG/T D70/2-01-2014 ".
According to highway tunnel illumination design details, changeover portion is divided into three illumination stage according to gradual change principle of successively decreasing, and brightness calculation formula corresponding is with it:
The brightness of illumination of interlude is determined jointly by factors such as tunnel single-direction and dual-direction, road speed, vehicle flowrates.
According to highway tunnel illumination design details, outlet section is divided into two illumination stage, and brightness calculation formula corresponding is with it:
S3, as shown in Figure 5: adopt the illumination method of real-time of camera video image process to calculate road illumination actual value in hole in real time in specific implementation process.Need before measuring to demarcate CCD digital camera, calibrated the conversion relational expression of gradation of image and actual illumination by formula.When practical application, video camera is arranged on tunnel internal, tunnel internal pavement image is obtained by shooting, the digital picture input computer obtained is obtained grey scale pixel value, gray value is brought into the relational expression obtained, the brightness value of road surface each point and the Illumination Distribution situation on road surface can be obtained.
S4, the actual brightness value calculated in the setting brightness value calculated in S2 and S3 is carried out the adjustment of PID closed loop feedback by PID adjustment module, judge in current tunnel hole, whether the actual output brightness of light fixture satisfies the demands, and judged result is sent to host computer in real time.
First the difference of actual brightness value that brightness settings and video camera calculate and the size in dead band is judged.
If difference is between the two less than dead band, then do not need to carry out brightness regulation; If difference is between the two greater than dead band, then need to regulate brightness, after choosing suitable p, i, d parameter, utilize formula below to control.
con＝pv+p×e[k]+i×e[k-1]+d×e[k-2]
Wherein, pv is the actual brightness value that video camera calculates; E [k] refers to now brightness settings and video camera and calculates the difference of actual brightness value; E [k-1] refers to the difference that last brightness settings and video camera calculate actual brightness value; E [k-2] refers to the difference that large last brightness settings and video camera calculate actual brightness value; Con is new control brightness value.
S5, computer are the light adjusting controller that corresponding dimming commands passes in tunnel according to formula the control brightness transition obtained, and instruction transformation becomes corresponding pulse signal to be adjusted the brightness of each light fixture by PWM dimming mode by light adjusting controller.Thus, achieve the closed loop feedback control that tunnel illumination controls, ensure that the intrinsic brilliance in tunnel meets illumination requirement.Above-mentioned light adjusting controller comprises 4 ports, and each port can control at most 64 light fixtures, and each light adjusting controller can link at most 256 lamps.
As shown in Figure 3 and Figure 4: a kind of tunnel illumination closed-loop feedback control system comprises: vehicle information collection unit 1, environment information acquisition unit 2, illumination Real-Time Monitoring unit 3, host computer 5, PID regulation unit 4 and light adjusting controller 6.
In order to solve tunnel illumination energy-saving safety control problem, the present invention builds tunnel illumination supervisory control system according to Fig. 5, comprise the vehicle information collection unit 1 be made up of infrared sensor device, coil vehicle detector, the environment information acquisition unit 2 of visibility meter, the luminance of outer caves meter composition inside and outside hole, the illumination Real-Time Monitoring unit 3 that in hole, in illumination instrument, hole, video camera forms; Vehicle detection group primary responsibility gathers vehicle flowrate, the speed of a motor vehicle, vehicle with or without information; Whether infrared sensor primary responsibility detects has vehicle to pass through, and for statistical vehicle flowrate information; The main measurement of vehicle speed of coil vehicle detector; Inside and outside hole, visibility meter is responsible for gathering visibility information inside and outside hole; The luminance of outer caves meter is responsible for gathering the luminance of outer caves information; In hole, in illumination instrument and hole, video camera forms illumination real-time monitoring system in hole, is responsible for illumination in Real-Time Monitoring hole.
Vehicle information collection unit 1 gathers vehicle speed information in tunnel, information of vehicle flowrate, vehicle with or without information.Environment information acquisition unit 2 gathers visibility information inside and outside the luminance of outer caves information in tunnel, hole monochrome information, hole.Illumination Real-Time Monitoring unit 3 Real-time Obtaining tunnel internal pavement image, calculate the Illumination Distribution situation on the actual brightness value of tunnel internal each point and whole road surface based on gradation of image, described illumination Real-Time Monitoring unit 3 can also detect in hole information such as whether having in stoppage of vehicle or car accident, hole whether breaking out of fire.Host computer 5 receives the data message that described vehicle information collection unit 1, environment information acquisition unit 2 and illumination Real-Time Monitoring unit 3 transmit, and calculates according to the data message collected and highway tunnel illumination design details the brightness value set required for each section in hole.PID regulation unit 4 runs in host computer 5.The actual brightness value that the brightness value set required for each section that PID regulation unit 4 calculates according to host computer 5 and illumination Real-Time Monitoring unit 3 calculate carries out the adjustment of PID closed loop feedback.The brightness value that PID regulation unit 4 exports is converted to lamp brightness construction quality information in tunnel by host computer 5.Described host computer 5 receives the data message that PID regulation unit 4 transmits, and the actual output brightness that the pulse signal that command signal is converted to correspondence by the light adjusting controller controlled in tunnel in real time adjusts multiple light fixture in Tunnel by PWM dimming mode reaches actual demand.PWM dimming mode refers to the light-dimming method of pulse width modulation, namely carries out digitally coded method to analog signal level, is wherein 0 ~ 255 adjustable to the light adjusting grade of light fixture.
PID regulation unit 4 judges whether the actual output brightness of light fixture meets the demands, if do not met, PID adjustment is carried out to it, and the new brightness value after being regulated by PID is real-time transmitted to host computer 5, new brightness value is converted to the brilliance control grade (0 ~ 255) of light fixture by host computer 5 by formula, lamp brightness construction quality command signal is converted to corresponding pulse signal by the light adjusting controller 6 in real-time control tunnel, by the actual output brightness of multiple light fixture in PWM dimming mode adjustment Tunnel.
PID regulation unit 4 have employed incremental timestamp, not only can reflect the deviation signal of control system timely, reduces deviation, and by after integral control action, can eliminate static difference, the precision of system is increased substantially.By feedback effect, can revise signal, thus accelerate the response speed of system, reduce regulating time.
Tunnel illumination closed-loop feedback control method of the present invention and control system, video camera is utilized to carry out Real-Time Monitoring to the illumination in tunnel, PID is utilized to regulate the lighting illumination intensity controlled in real time in tunnel, what make that the illumination in tunnel can be real-time follows actual illumination requirement, optimize the safe operation of illuminator, avoid the illumination decay that damage and light decay due to light fixture bring, decrease the generation of traffic accident.
The above; be only the present invention's preferably embodiment; but protection scope of the present invention is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the present invention discloses; be equal to according to technical scheme of the present invention and inventive concept thereof and replace or change, all should be encompassed within protection scope of the present invention.
Claims (2)
1. a tunnel illumination closed-loop feedback control method, is characterized in that: comprise the following steps:
S1: inside and outside gathering Tunnel, monochrome information, information of vehicle flowrate, vehicle speed information and vehicle are with or without information;
S2: calculate the setting brightness value in Tunnel required for each section according to the data message collected in S1 and highway tunnel illumination design details;
S3: obtain tunnel internal pavement image by video camera, calculate the Illumination Distribution situation on the actual brightness value of tunnel internal each point and whole road surface based on gradation of image, in simultaneous camera detection hole, whether have whether breaking out of fire information in stoppage of vehicle or car accident, hole;
S4: carry out the adjustment of PID closed loop feedback according to the brightness value set and actual brightness value, judge in current tunnel hole, whether the actual output brightness of light fixture satisfies the demands, if do not met, calculate the brightness value that makes new advances, convert the brightness value exported after PID closed loop feedback regulates in tunnel lamp brightness construction quality information;
S5: adopt light adjusting controller the brilliance control grade command signal of light fixture to be converted to corresponding pulse signal, by the output brightness value of light fixture in PWM dimming mode adjustment tunnel.
2. a tunnel illumination closed-loop feedback control system, is characterized in that comprising: gathering vehicle speed information, information of vehicle flowrate, vehicle in tunnel has asemantic vehicle information collection unit;
Gather the environment information acquisition unit of visibility information inside and outside the luminance of outer caves information, hole monochrome information, hole in tunnel;
Real-time Obtaining tunnel internal pavement image, calculate the illumination Real-Time Monitoring unit of the Illumination Distribution situation on the actual brightness value of tunnel internal each point and whole road surface based on gradation of image, in described monitoring means detection hole, whether have whether breaking out of fire information in stoppage of vehicle or car accident, hole;
Receive the data message that described vehicle information collection unit, environment information acquisition unit and illumination Real-Time Monitoring unit transmit, and calculate the host computer of the brightness value set required for each section in hole according to the data message collected and highway tunnel illumination design details;
The actual brightness value that the brightness value set required for each section that host computer calculates and illumination Real-Time Monitoring unit calculate carries out the PID regulation unit of PID closed loop feedback adjustment, described PID regulation unit runs in host computer, and host computer converts the brightness value that PID regulation unit exports in tunnel lamp brightness construction quality information;
The light adjusting controller of lamp brightness construction quality information in the tunnel that reception host computer transmits, the brilliance control grade command signal of light fixture is converted to corresponding pulse signal by described light adjusting controller, by the output brightness value of light fixture in PWM dimming mode adjustment tunnel.
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