CN113498238A - Tunnel illumination detection system and method - Google Patents
Tunnel illumination detection system and method Download PDFInfo
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Abstract
The invention discloses a tunnel illumination detection system and a method, wherein the system comprises a program-controlled light source and a brightness meter, wherein the program-controlled light source is used for simulating the change of the brightness outside a tunnel, realizing preset brightness output and acquiring, storing and outputting brightness data; the system overcomes the defects of the prior art, does not need manual stationing, reduces the interference of measuring personnel to the field environment, and has the characteristics of high measuring speed, low labor intensity, convenient data recording and processing and good safety.
Description
Technical Field
The invention relates to the technical field of tunnel illumination detection, and particularly belongs to a tunnel illumination detection system and method.
Background
The responsivity of the tunnel brightness adjustment system is of concern. The responsivity of the tunnel brightness adjusting system is too sensitive, light in the tunnel can be dim, driving can be affected, potential traffic safety hazards can be generated, and meanwhile, the service life of the lamp can be shortened due to frequent change of the brightness; if the responsivity of the tunnel brightness adjusting system is too slow, the illumination in the tunnel is not adjusted timely, unnecessary energy waste can be caused, and even traffic accidents can not be caused by the fact that necessary brightness is not achieved. Therefore, the tunnel brightness adjustment system in the tunnel needs to be detected to avoid the influence of the lighting system on driving.
The original industry standard is to measure and calculate by adopting a point-by-point illumination method. The manual point distribution method comprises a four-point method and a center method, and the specific measurement method is to divide grids in a measurement section and then measure the illumination of the relevant points one by using a handheld illuminometer. If the four-point method is adopted, measurement is carried out at four corners of each grid, and the center rule sets the measuring point at the center of each rectangular grid.
The system needs manual stationing, the working strength is high, the measuring process is complicated and time-consuming, the interference of measuring personnel to the field environment is large, and the measuring error is large.
Disclosure of Invention
The invention aims to provide a tunnel illumination detection system and a tunnel illumination detection method, which overcome the defects of the prior art.
In order to solve the problems, the technical scheme adopted by the invention is as follows:
a tunnel illumination detection system, comprising:
the program-controlled light source is used for simulating the change of the brightness outside the tunnel, realizing the preset brightness output, and acquiring, storing and outputting the brightness data;
the luminance instrument comprises a luminance measuring unit and a signal processing circuit, and the signal processing circuit can convert a luminance analog signal of the luminance measuring unit into a digital signal;
the detection equipment is connected with the brightness meter, is in wireless communication with the program-controlled light source, can set the sampling period and time of the brightness meter, and displays and stores the brightness value acquired by the brightness meter.
The program-controlled light source comprises an MCU module, a man-machine interaction module, a brightness detection unit, a standard source driving circuit, a real-time clock and a Lora wireless communication module, wherein the man-machine interaction module is connected with a surface light source, the power module supplies power to the program-controlled light source, the man-machine interaction module is used for displaying a measurement result and operating the program-controlled light source, the standard source driving circuit is used for adjusting the brightness of the surface light source, the surface light source is used for emitting light, the real-time clock is used for timing, the brightness detection unit is used for measuring the light emitting brightness of the surface light source, and the Lora wireless communication module is used for communicating with detection equipment.
The brightness detection unit comprises a brightness measurement unit and a signal processing circuit, and the signal processing circuit can convert a brightness analog signal of the brightness measurement unit into a digital signal.
The MCU module adopts an STM32 singlechip, the STM32 singlechip is embedded with a FLASH memory, and the FLASH memory can store the measurement data of the brightness detection unit.
The detection device comprises an MCU module, a human-computer interaction module, a real-time clock, a brightness meter interface, a USB storage module, a Lora wireless communication module and a power management module, wherein the human-computer interaction module, the real-time clock, the brightness meter interface, the USB storage module and the Lora wireless communication module are connected with the MCU module, the power management module is used for supplying power to the detection device, the human-computer interaction module is used for displaying a measuring result and operating the detection device, the brightness meter interface is used for connecting the brightness meter, the USB storage module is used for storing a testing result, and the Lora wireless communication module is used for communicating with a program control light source.
Wherein, the MCU module adopts STM32 singlechip.
A tunnel illumination detection method comprises the following steps:
A. responsivity measurement
(1) Standing the detection equipment in a measurement interval of a tunnel entrance section, connecting a brightness meter with the detection equipment, turning on a power supply of the detection equipment, arranging a programmable light source beside a brightness sensor of a tunnel brightness adjusting system outside the tunnel, and turning on the power supply of the programmable light source;
(2) setting a sampling period and time on detection equipment, setting a mode of the detection equipment into responsiveness detection, processing measurement setting information of the detection equipment by an MCU module of the detection equipment, sending the processed measurement setting information to a program-controlled light source by a Lora wireless communication module, receiving the measurement setting information sent by the detection equipment by the Lora wireless communication module of the program-controlled light source, analyzing by the MCU module, obtaining the measurement mode and the sampling storage period, simultaneously outputting a periodic sawtooth wave by the program-controlled light source and sending a response signal for starting detection to the detection equipment, and starting to measure the brightness value of a surface light source by a brightness detection unit and storing the brightness value in a FLASH memory by the MCU module;
(3) after receiving a response signal of the programmed light source for starting detection, the Lora wireless communication module of the detection device starts to record, display and store a sampling value of the brightness meter through analysis of the MCU module of the detection device;
(4) after the measurement is finished, the detection equipment sends a finishing signal to the program control light source, and the program control light source sends the data stored in the FLASH memory to the detection equipment;
(5) the detection equipment collects data collected by the program-controlled light source and data collected by the detection equipment in the same coordinate system; and calculating the response degree of the tunnel lighting control system according to the phase difference of the wave crests.
B. Luminance distribution detection
(1) Standing the detection equipment in a measurement interval of a tunnel entrance section, connecting a brightness meter with the detection equipment, turning on a power supply of the detection equipment, arranging a programmable light source beside a brightness sensor of a tunnel brightness adjusting system outside the tunnel, and turning on the power supply of the programmable light source;
(2) setting the brightness value and brightness value of the surface light source light emission of the programmed light source and the threshold value, sampling period and time of the actual surface light source light emission brightness on the detection equipment, then setting the mode of the detection equipment as brightness distribution detection, processing the measurement setting information of the detection equipment by an MCU module of the detection equipment, sending the processed measurement setting information to the programmed light source by the Lora wireless communication module, receiving the measurement setting information sent by the detection equipment by the Lora wireless communication module of the programmed light source, analyzing the measurement setting information by the MCU module to obtain the measurement mode and sampling storage period, outputting stable brightness by the surface light source of the programmed light source, starting to measure the brightness value of the surface light source by the brightness detection unit, and generating a detection start signal to the detection equipment when the brightness measurement difference value between the brightness of the surface light source and the set brightness is smaller than the threshold value by the brightness detection unit, the MCU module of the program-controlled light source sends a response signal for starting detection to the detection equipment through the Lora wireless communication module, and simultaneously stores the brightness value of the surface light source detected by the brightness detection unit in the FLASH memory;
(3) after receiving a response signal of the programmed light source for starting detection, the Lora wireless communication module of the detection device analyzes the response signal by the MCU module of the detection device, the detection device starts to record, display and store a sampling value of the brightness meter, the motor vehicle starts to run at a constant speed and passes through a detection interval, and the detection device collects, displays and stores the brightness in the tunnel;
(4) after the measurement is finished, the detection equipment sends a measurement stop signal to the program control light source, and the program control light source sends the data stored in the FLASH memory to the detection equipment;
(5) the detection equipment collects data collected by the program-controlled light source and data collected by the detection equipment in the same coordinate system, and indexes such as average brightness, total brightness uniformity, vertical center line height uniformity and the like of a measurement section can be obtained according to the collected data.
Compared with the prior art, the invention has the following implementation effects:
the detection equipment and the brightness meter are installed on the motor vehicle for vehicle-mounted detection, so that the acquisition and storage of the tunnel illumination brightness can be realized; the system is convenient to install and recover, can be recovered after the system is finished, does not need to be permanently and fixedly installed in a tunnel, is convenient for maintaining equipment and prolongs the service life of instruments; the system takes the road surface brightness value as a direct measurement quantity, does not need illumination as intermediate quantity conversion, and improves the measurement accuracy to a certain extent; the detection equipment of the system can be connected with 5 brightness meters at most, and a sampling channel is arranged according to the actual situation of the tunnel and the measurement requirement, so that a plurality of measuring points on the same cross section of a tunnel detection section are sampled simultaneously; meanwhile, the collected brightness values can be stored in real time, text documents can be generated and stored in a U disk, and data analysis is facilitated.
The system does not need manual stationing, can sample according to the sampling cycle interval that sets up, and what this system measured is the luminance value of minimum area, measure the average brightness of circle promptly, can record a plurality of measurement circles of the same section in tunnel simultaneously, not only can carry out quick continuous measurement, can also reduce the measurement risk, reduce survey crew and to the site environment interference, have that measuring speed is fast, low in labor strength, data record and processing are convenient, the characteristics that the security is good.
Drawings
Fig. 1 is a schematic view of measurement by a four-point method and a center method.
Fig. 2 is a schematic structural diagram of a programmed light source.
Fig. 3 is a schematic structural diagram of the detection apparatus.
FIG. 4 is a schematic diagram of the operation of responsivity measurement.
Fig. 5 is a schematic view of a working process of the programmable light source.
Fig. 6 is a schematic workflow diagram of the detection apparatus.
FIG. 7 is a schematic diagram of the system of the present invention during testing.
Fig. 8 is a schematic diagram illustrating the operation of the luminance distribution detection.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The manual dotting method includes a four-point method and a center method, as shown in fig. 1, the four-point method is to measure at four corners of each grid, and the center method is to set measuring points in the center of each rectangular grid.
The tunnel illumination detection system of the present invention comprises: the program-controlled light source is used for simulating brightness change outside a tunnel, can realize preset brightness output, and collects, stores and outputs brightness data, as shown in fig. 2. The program-controlled light source system comprises an MCU module, a human-computer interaction module, a brightness detection unit, a standard source driving circuit, a real-time clock and a Lora wireless communication module, wherein the human-computer interaction module is connected with the MCU module, the standard source driving circuit is connected with a surface light source, and the real-time clock is an embedded unit of the MCU module.
The MCU module of the program control light source system adopts an STM32 single chip microcomputer, an STM32 single chip microcomputer is embedded with a FLASH memory, a standard source driving circuit is used for adjusting the brightness of a surface light source, the MCU module is used for receiving data of a human-computer interaction module, a brightness detection unit, a real-time clock and a Lora wireless communication module and processing the data, processed result data are sent to the human-computer interaction module, the standard source driving circuit and the Lora wireless communication module, the brightness detection unit is used for measuring the brightness of the surface light source and feeding the brightness value of the surface light source back to the MCU module, and the MCU module can store the actual brightness value of the surface light source and store the actual brightness value into the FLASH memory; the man-machine interaction module is used for inputting sampling period, time and setting brightness of the surface light source, the man-machine interaction module comprises a display panel and a function key, the display panel can display real-time brightness of the system, the function key is used for inputting sampling period, time, preset surface light source brightness and a threshold value of a difference value between the allowed surface light source actual brightness and the preset surface light source brightness, the MCU module sends a signal to the standard source drive circuit according to the difference value between the actual brightness measured by the brightness detection unit and the set output brightness, regulates and controls the brightness of the surface light source to realize PID closed-loop control, wherein the period of ADC conversion and PID adjustment of the program-controlled light source is 0.5s, the sampling period of the program-controlled light source system is 1.0s, but can be set between 0.1 s and 9s according to the needs, the period of ADC conversion and PID adjustment of the program-controlled light source and the sampling period of the program-controlled light source system are timed by a timer embedded in the MCU module. The brightness detection unit comprises a brightness measurement unit and a signal processing circuit, the signal processing circuit can convert the brightness analog signal of the brightness measurement unit into a digital signal, namely ADC conversion, and the brightness detection unit adopts a brightness meter.
The program-controlled light source system is powered by the power module, the power module uses a storage battery, and certainly, an external power supply can be used for supplying power. The human-computer interaction module is used for displaying a measurement result and operating the program control light source system, the standard source driving circuit provides 0-5V regulated voltage, the brightness of the surface light source is controlled, the surface light source is powered by the power supply module, the real-time clock is used for timing, the Lora wireless communication module is used for communicating with the detection equipment, and the brightness value data stored in the FLASH memory can be sent to the detection equipment.
The tunnel illumination detection system further comprises a detection device connected with the program-controlled light source through a Lora wireless communication module, as shown in fig. 3, the detection device comprises an MCU module, a human-computer interaction module connected with the MCU module, a real-time clock, a luminance meter interface, a USB storage module, a Lora wireless communication module and a power management module for supplying power to the detection device, the power management module is an external power supply, and the human-computer interaction module is used for displaying a measurement result and carrying out parameter setting on the detection device. The MCU module of check out test set also adopts STM32 singlechip, USB storage module is used for saving the test result, USB storage module uses the USB flash disk, Lora wireless communication module is used for communicating with programme-controlled light source, the luminance appearance interface is used for connecting the luminance appearance, check out test set and aviation plug connection for the luminance appearance, 5 luminance appearance can be connected to a check out test set, the luminance appearance includes luminance measuring unit and signal processing circuit, signal processing circuit can convert luminance analog signal of luminance measuring unit into digital signal, ADC conversion promptly.
The sampling period and time of the brightness meter can be set through the human-computer interaction module of the detection device, the human-computer interaction module can display the brightness value collected by the brightness meter, and the collected brightness value is stored in the USB storage module.
When the tunnel illumination detection system is used for tunnel illumination detection, the responsivity and the brightness distribution can be detected. Wherein, the responsivity measurement is shown in figures 4-6, and the steps are as follows:
(1) standing the detection equipment in a measurement interval of a tunnel entrance section, connecting a brightness meter with the detection equipment, installing the brightness meter on a motor vehicle through a support, turning on a power supply of the detection equipment, arranging a program-controlled light source beside a brightness sensor of a tunnel brightness adjusting system outside the tunnel, and turning on the power supply of the program-controlled light source;
(2) setting a sampling period and time on detection equipment, setting a mode of the detection equipment into responsiveness detection, processing measurement setting information of the detection equipment by an MCU module of the detection equipment, sending the processed measurement setting information to a program-controlled light source by a Lora wireless communication module, receiving the measurement setting information sent by the detection equipment by the Lora wireless communication module of the program-controlled light source, analyzing by the MCU module, obtaining the measurement mode and the sampling storage period, simultaneously outputting a periodic sawtooth wave by the program-controlled light source and sending a response signal for starting detection to the detection equipment, and starting to measure the brightness value of a surface light source by a brightness detection unit and storing the brightness value in a FLASH memory by the MCU module;
(3) after receiving a response signal of the programmed light source for starting detection, the Lora wireless communication module of the detection device starts to record, display and store a sampling value of the brightness meter through analysis of the MCU module of the detection device;
(4) after the measurement is finished, the detection equipment sends a finishing signal to the program control light source, and the program control light source sends the data stored in the FLASH memory to the detection equipment;
(5) the detection equipment collects data collected by the program-controlled light source and data collected by the detection equipment in the same coordinate system; and calculating the response degree of the tunnel lighting control system according to the phase difference of the wave crests.
The brightness distribution detection is shown in fig. 5-8, and includes the following steps:
(1) standing the detection equipment in a measurement interval of a tunnel entrance section, connecting a brightness meter with the detection equipment, turning on a power supply of the detection equipment, arranging a programmable light source beside a brightness sensor of a tunnel brightness adjusting system outside the tunnel, and turning on the power supply of the programmable light source;
(2) setting the brightness value and brightness value of the surface light source light emission of the programmed light source and the threshold value, sampling period and time of the actual surface light source light emission brightness on the detection equipment, then setting the mode of the detection equipment as brightness distribution detection, processing the measurement setting information of the detection equipment by an MCU module of the detection equipment, sending the processed measurement setting information to the programmed light source by the Lora wireless communication module, receiving the measurement setting information sent by the detection equipment by the Lora wireless communication module of the programmed light source, analyzing the measurement setting information by the MCU module to obtain the measurement mode and sampling storage period, outputting stable brightness by the surface light source of the programmed light source, starting to measure the brightness value of the surface light source by the brightness detection unit, and generating a detection start signal to the detection equipment when the brightness measurement difference value between the brightness of the surface light source and the set brightness is smaller than the threshold value by the brightness detection unit, the MCU module of the program-controlled light source sends a response signal for starting detection to the detection equipment through the Lora wireless communication module, and simultaneously stores the brightness value of the surface light source detected by the brightness detection unit in the FLASH memory;
(3) after receiving a response signal of the programmed light source for starting detection, the Lora wireless communication module of the detection device analyzes the response signal by the MCU module of the detection device, the detection device starts to record, display and store a sampling value of the brightness meter, the motor vehicle starts to run at a constant speed and passes through a detection interval, and the detection device collects, displays and stores the brightness in the tunnel;
(4) after the measurement is finished, the detection equipment sends a measurement stop signal to the program control light source, and the program control light source sends the data stored in the FLASH memory to the detection equipment;
(5) the data collected by the program-controlled light source and the data collected by the detection equipment are gathered in the same coordinate system, and the indexes of average brightness, total brightness uniformity, longitudinal uniformity of the centerline height and the like of the measurement section can be obtained according to the collected data.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. A tunnel illumination detection system, comprising:
the program-controlled light source is used for simulating the change of the brightness outside the tunnel, realizing the preset brightness output, and acquiring, storing and outputting the brightness data;
the luminance instrument comprises a luminance measuring unit and a signal processing circuit, and the signal processing circuit can convert a luminance analog signal of the luminance measuring unit into a digital signal;
the detection equipment is connected with the brightness meter, is in wireless communication with the program-controlled light source, can set the sampling period and time of the brightness meter, and displays and stores the brightness value acquired by the brightness meter.
2. The system according to claim 1, wherein the program-controlled light source comprises an MCU module, a human-computer interaction module connected to the MCU module, a brightness detection unit, a standard source driving circuit connected to the surface light source, a real-time clock, a Lora wireless communication module, and a power module for supplying power to the program-controlled light source, the human-computer interaction module is configured to display a measurement result and operate the program-controlled light source, the standard source driving circuit is configured to adjust brightness of the surface light source, the surface light source is configured to emit light, the real-time clock is configured to time, the brightness detection unit is configured to measure luminance of the surface light source, and the Lora wireless communication module is configured to communicate with the detection device.
3. The system of claim 2, wherein the brightness detection unit comprises a brightness measurement unit and a signal processing circuit, and the signal processing circuit converts the brightness analog signal of the brightness measurement unit into a digital signal.
4. The tunnel illumination detection system of claim 2, wherein the MCU module adopts an STM32 single chip microcomputer, the STM32 single chip microcomputer is embedded with a FLASH memory, and the FLASH memory can store the measurement data of the brightness detection unit.
5. The tunnel illumination detection system of claim 1, wherein the detection device comprises an MCU module, a human-computer interaction module, a real-time clock, a luminance meter interface, a USB storage module, a Lora wireless communication module and a power management module, wherein the human-computer interaction module, the real-time clock, the luminance meter interface, the USB storage module and the Lora wireless communication module are connected with the MCU module, the power management module is used for supplying power to the detection device, the human-computer interaction module is used for displaying a measurement result and operating the detection device, the luminance meter interface is used for being connected with a luminance meter, the USB storage module is used for storing a test result, and the Lora wireless communication module is used for communicating with a program control light source.
6. A tunnel lighting detection system of claim 5, wherein the MCU module adopts STM32 singlechip.
7. Method for detection with a tunnel lighting system according to any one of claims 1 to 6, characterized in that it comprises the following steps:
A. responsivity measurement
(1) Standing the detection equipment in a measurement interval of a tunnel entrance section, connecting a brightness meter with the detection equipment, turning on a power supply of the detection equipment, arranging a programmable light source beside a brightness sensor of a tunnel brightness adjusting system outside the tunnel, and turning on the power supply of the programmable light source;
(2) the method comprises the steps that a sampling period and time are set on detection equipment, then, the mode of the detection equipment is set to be responsiveness detection, then measurement setting information of the detection equipment is processed by an MCU module of the detection equipment, a Lora wireless communication module sends the processed measurement setting information to a program-controlled light source, the Lora wireless communication module of the program-controlled light source receives the measurement setting information sent by the detection equipment, the MCU module analyzes the measurement setting information to obtain the measurement mode and the sampling storage period, the program-controlled light source simultaneously outputs periodic sawtooth waves and sends a response signal for starting detection to the detection equipment, and a brightness detection unit starts to measure the brightness value of a surface light source and is stored in a FLASH memory by the MCU module.
(3) After receiving a response signal of the programmed light source for starting detection, the Lora wireless communication module of the detection device starts to record, display and store a sampling value of the brightness meter through analysis of the MCU module of the detection device;
(4) after the measurement is finished, the detection equipment sends a finishing signal to the program control light source, and the program control light source sends the data stored in the FLASH memory to the detection equipment;
(5) the detection equipment collects data collected by the program-controlled light source and data collected by the detection equipment in the same coordinate system; and calculating the response degree of the tunnel lighting control system according to the phase difference of the wave crests.
B. Luminance distribution detection
(1) Standing the detection equipment in a measurement interval of a tunnel entrance section, connecting a brightness meter with the detection equipment, turning on a power supply of the detection equipment, arranging a programmable light source beside a brightness sensor of a tunnel brightness adjusting system outside the tunnel, and turning on the power supply of the programmable light source;
(2) setting the brightness value and brightness value of the surface light source light emission of the programmed light source and the threshold value, sampling period and time of the actual surface light source light emission brightness on the detection equipment, then setting the mode of the detection equipment as brightness distribution detection, processing the measurement setting information of the detection equipment by an MCU module of the detection equipment, sending the processed measurement setting information to the programmed light source by the Lora wireless communication module, receiving the measurement setting information sent by the detection equipment by the Lora wireless communication module of the programmed light source, analyzing the measurement setting information by the MCU module to obtain the measurement mode and sampling storage period, outputting stable brightness by the surface light source of the programmed light source, starting to measure the brightness value of the surface light source by the brightness detection unit, and generating a detection start signal to the detection equipment when the brightness measurement difference value between the brightness of the surface light source and the set brightness is smaller than the threshold value by the brightness detection unit, the MCU module of the program-controlled light source sends a response signal for starting detection to the detection equipment through the Lora wireless communication module, and simultaneously stores the brightness value of the surface light source detected by the brightness detection unit in the FLASH memory.
(3) After receiving a response signal of the programmed light source for starting detection, the Lora wireless communication module of the detection device analyzes the response signal by the MCU module of the detection device, the detection device starts to record, display and store a sampling value of the brightness meter, the motor vehicle starts to run at a constant speed and passes through a detection interval, and the detection device collects, displays and stores the brightness in the tunnel;
(4) after the measurement is finished, the detection equipment sends a measurement stop signal to the program control light source, and the program control light source sends the data stored in the FLASH memory to the detection equipment;
(5) the data collected by the program-controlled light source and the data collected by the detection equipment are gathered in the same coordinate system, and the indexes of average brightness, total brightness uniformity, longitudinal uniformity of the centerline height and the like of the measurement section can be obtained according to the collected data.
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| WO2024051605A1 (en) * | 2022-09-05 | 2024-03-14 | 深圳比特微电子科技有限公司 | Brightness measurement method and apparatus, control method and apparatus for photographic apparatus, and medium |
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