Lamp control method and system used in tunnel

Abstract

The invention provides a lamp control method and system used in a tunnel, and the method comprises the steps: obtaining the basic information of lamps in the tunnel through broadcasting, and carrying out the channel detection according to the basic information of the lamps, and obtaining the relative distance between the lamps in the tunnel; and in response to the fact that a sensor of the current lamp detects a vehicle, a lighting event of the current lamp is triggered, induction signals are sent to surrounding lamps, the surrounding lamps execute a lighting task with gradually-changed brightness based on the distance between the surrounding lamps and the current lamp, the lighting events of the lamps are mutually independent, and the lighting task is executed with the maximum brightness in the lighting events of the lamps. According to the lamp control method, the lamp can achieve intelligent dimming according to the vehicle position, brightness gradual change provides comfortable visual experience, multi-signal comprehensive processing ensures the optimal brightness, a reliable and stable system is constructed through integrated design, the lighting effect is effectively improved, energy is saved, consumption is reduced, driving safety is guaranteed, installation and maintenance are convenient, and the system is suitable for popularization and application. And the intelligent level and the comprehensive performance of tunnel illumination are greatly improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of tunnel lighting, and in particular relates to a lighting control method and system for use in a tunnel. Background Art

[0002] Tunnel lighting plays a vital role in ensuring driving safety. In a tunnel environment, light conditions are relatively complex, and a good lighting system can ensure that drivers can clearly identify road conditions, traffic signs, and other vehicles, thereby effectively reducing the risk of accidents. However, most traditional tunnel lighting systems currently use a fixed lighting mode, that is, regardless of the traffic flow in the tunnel or the driving position of the vehicle, the lamps emit light at a constant brightness. This method not only causes a large amount of energy waste, but also has many inconveniences in practical applications.

[0003] The existing tunnel lighting control scheme, based on the traditional wired control method, has the following problems: the wiring is complex and costly, and a large number of cables need to be laid in the tunnel to connect the various lamps and control devices, which not only increases the difficulty and cost of construction, but also makes subsequent maintenance more cumbersome. Once a cable fails, troubleshooting and repair work often requires a lot of manpower and time. Poor flexibility. Since the control of lamps depends on fixed wiring, rewiring is almost required when adjusting the layout of lamps or upgrading their functions, which limits the scalability and adaptability of the lighting system.

[0004] Some are based on simple sensing control methods, and the lighting control is single: the lighting of the lamps is determined only by whether the vehicle is approaching, and it is impossible to achieve precise brightness adjustment according to the vehicle's position. For example, when a vehicle is driving in the middle of a tunnel, the lamps near the entrance may still maintain a high brightness, resulting in energy waste. Lack of regional collaborative control: effective collaborative work between lamps cannot be achieved, each lamp responds to vehicle sensing independently, and intelligent dimming cannot be performed according to the overall traffic conditions, resulting in uneven lighting effects, and some areas may be too bright or too dark. Summary of the invention

[0005] In order to solve the above problems in the prior art, the present application provides a lighting control method and system for use in a tunnel to solve the above technical defects.

[0006] According to one aspect of the present invention, a method for controlling lighting in a tunnel is provided, comprising:

[0007] Obtain basic information of lamps in the tunnel through broadcasting, and perform channel detection based on the basic information of the lamps to obtain the relative distance between the lamps in the tunnel;

[0008] In response to the sensor of the current lamp detecting a vehicle, the current lamp's lighting event is triggered and a sensing signal is sent to surrounding lamps. The surrounding lamps perform a lighting task with gradual brightness change based on the distance from the current lamp. The lighting events of the lamps are independent of each other and the lighting task is performed with the maximum brightness in their own lighting events.

[0009] In a specific embodiment, the lamps in the tunnel include two groups of lamps corresponding to the bidirectional lanes. The two groups of lamps are configured by dialing codes. The lamps in the same lane have the same dialing code, while the lamps in different lanes have different dialing codes. This configuration method enables the system to clearly distinguish the lamps in different lanes, making it easier to independently control the lamps in different lanes.

[0010] In a specific embodiment, the basic information includes the lamp type and lamp ID, and BLE channel detection is performed on lamps of the same type to obtain the relative distance between lamps. This setting enables the lamp to timely transmit its own working status information to surrounding lamps, and the surrounding lamps can respond accordingly based on the received broadcast information.

[0011] In a specific embodiment, the lighting event of a lamp is executed based on the lighting logic table of the lamp itself, which includes the distance parameter, brightness parameter and enable state of the current lamp and its surrounding lamps, and the enable state is represented by whether the sensor of the current lamp detects a vehicle. The control method based on the logic table makes the collaborative work between lamps more orderly and efficient, and can adjust the lighting state in real time according to the dynamic changes of the vehicle.

[0012] In a specific embodiment, in response to the sensor of the current lamp detecting a vehicle, the lamp periodically broadcasts ADV via BLE and performs a countdown task, updates the enable state of the current lamp to yes, and stops broadcasting and updates the enable state of the current lamp to no in response to the countdown task ending.

[0013] In a specific embodiment, the sensor of the current lamp repeatedly detects the vehicle and resets the countdown task. In tunnel traffic, the vehicle may stop briefly or drive slowly in a certain area. In this case, resetting the countdown task can prevent the lamp from mistakenly changing the lighting state due to the end of the countdown, ensuring the lighting system's accurate response to vehicle dynamics and improving the reliability and stability of lighting control.

[0014] In a specific embodiment, surrounding lamps receive signals from the current lamp and perform lighting tasks with decreasing brightness from near to far based on the distance from the current lamp. This gradual brightness lighting method simulates the changing law of natural light, reduces the stimulation of sudden changes in light to the driver's vision, and helps to improve the driver's visual comfort and driving safety.

[0015] In a specific embodiment, in response to the lamp receiving vehicle sensing information from multiple lamps, the brightness in the lighting logic table is updated based on the corresponding maximum brightness in the vehicle sensing information of the multiple lamps, and the lighting task is executed based on the brightness. This setting can ensure that the area always has sufficient lighting brightness to meet driving safety requirements, while avoiding energy waste caused by excessive lighting.

[0016] According to another aspect of the present invention, a lighting control system for use in a tunnel is proposed, comprising lamps arranged at intervals in the tunnel, the lamps being provided with a main controller, a vehicle sensing module and a BLE module for executing the lighting control method as described above.

[0017] In a specific embodiment, the tunnel includes a first lane and a second lane arranged in both directions, the lamps inside the first lane have the same dial code, the lamps inside the second lane have the same dial code, and the lamps between the first lane and the second lane are configured with different dial codes.

[0018] Compared with the prior art, the beneficial results of the present invention are:

[0019] The lighting control method and system for tunnels of the present invention can accurately obtain the relative distance of lamps through BLE channel detection, and can distinguish lanes by dialing codes, so that lighting control is accurate and flexible. Based on the lighting logic table and dynamic broadcasting mechanisms, the lamps can be intelligently dimmed according to the vehicle position, and the brightness gradient provides a comfortable visual experience. The multi-signal comprehensive processing ensures the optimal brightness. The integrated design builds a reliable and stable system, effectively improving the lighting effect, saving energy and reducing consumption, ensuring driving safety, and facilitating installation and maintenance, which greatly improves the intelligence level and comprehensive performance of tunnel lighting. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings are included to provide a further understanding of the embodiments and are incorporated into and constitute a part of this specification. The accompanying drawings illustrate the embodiments and together with the description are used to explain the principles of the present invention. Other embodiments and many expected advantages of the embodiments will be readily appreciated as they become better understood by reference to the following detailed description. Other features, objects and advantages of the present application will become more apparent by reading the detailed description of the non-limiting embodiments made with reference to the following drawings:

[0021] Figure 1 is a flow chart of a method for controlling lights in a tunnel according to an embodiment of the present invention;

[0022] Figure 2 is a schematic diagram of the layout of lamps in a tunnel according to a specific embodiment of the present invention;

[0023] Figure 3 It is a schematic diagram of the logical structure of a lamp according to a specific embodiment of the present invention. DETAILED DESCRIPTION

[0024] The present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the relevant invention, rather than to limit the invention. It should also be noted that, for ease of description, only the parts related to the relevant invention are shown in the accompanying drawings.

[0025] The present invention proposes a lighting control method and system for use in a tunnel. Figure 1 FIG. 4 shows a flow chart of a method for controlling lights in a tunnel according to an embodiment of the present invention. Figure 1 As shown, the lighting control method for a tunnel includes:

[0026] S1: Obtain basic information of lamps in the tunnel through broadcasting, and perform channel detection based on the basic information of the lamps to obtain the relative distance between the lamps in the tunnel.

[0027] In a specific embodiment, by collecting the ADV broadcast of the lamps, the basic information of the lamps including the lamp type and the lamp ID is obtained, and the BLE channel detection is performed on the lamps of the same type to obtain the relative distance between the lamps. The BLE wireless radio frequency module in the lamp sends the detection signal according to certain rules. These signals contain specific coding or identification information so that the receiving end can identify and distinguish the signals sent by different lamps. When a lamp (transmitter) sends a signal, the surrounding lamps (receivers) will receive the signal. The receiving end obtains the distance-related information between the transmitting end and the receiving end by detecting parameters such as the received signal strength, signal arrival time or signal phase change. In this application, technologies such as RRT (Round-TripTime) or PBR (Phase-Based Ranging) are used to improve the accuracy of ranging. Taking RRT technology as an example, the transmitting end sends a signal, and the receiving end immediately returns a response signal to the transmitting end after receiving the signal. The transmitter calculates the round-trip distance of the signal based on the time difference (round-trip time) between sending the signal and receiving the response signal, combined with the propagation speed of the signal in the air (a known constant), and thus obtains the straight-line distance between the transmitter and the receiver. This can achieve high-precision ranging, with the error controlled within ±0.5m.

[0028] Compared with the traditional ranging method based on signal strength (RSSI), the accuracy of BLE channel detection ranging technology has been significantly improved. In tunnel lighting control, accurate distance measurement is essential to achieve accurate dimming of lamps. For example, by accurately knowing the distance between the vehicle and each lamp, the system can adjust the brightness of the lamps close to the vehicle according to the preset brightness adjustment strategy, so that the lamps far from the vehicle provide higher brightness, while the lamps far from the vehicle appropriately reduce the brightness, thereby achieving a more energy-saving and reasonable lighting effect. BLE channel detection ranging technology is relatively less affected by environmental electromagnetic conditions and transmission media. In the tunnel environment, although there is a certain amount of electromagnetic interference, BLE technology can effectively resist these interferences and ensure the stability of the ranging results through reasonable channel selection and signal processing algorithms. This enables the distance information between lamps to always remain accurate and reliable, providing stable input data for the lighting control system and ensuring the stable operation of the entire system. Even in complex situations such as large traffic flow and frequent vehicle entry and exit in the tunnel, the ranging system can still work normally, and there will be no distance measurement errors or fluctuations caused by interference, thereby avoiding abnormal lighting control.

[0029] S2: In response to the sensor of the current lamp detecting a vehicle, the lighting event of the current lamp is triggered and a sensing signal is sent to the surrounding lamps. The surrounding lamps perform a lighting task with gradual brightness change based on the distance from the current lamp. The lighting events of the lamps are independent of each other and the lighting task is performed with the maximum brightness in their own lighting events.

[0030] In a specific embodiment, the lighting event of a lamp is executed based on the lighting logic table of the lamp itself. The lighting logic table includes the distance parameters, brightness parameters and enablement status of the current lamp and its surrounding lamps. The enablement status is represented by whether the sensor of the current lamp detects a vehicle. In response to the sensor of the current lamp detecting a vehicle, the lamp periodically broadcasts ADV to the outside through BLE and executes a countdown task, updates the enablement status of the current lamp to yes, and in response to the countdown task ending, stops broadcasting and updates the enablement status of the current lamp to no. The sensor of the current lamp repeatedly detects the vehicle and resets the countdown task. The surrounding lamps receive the signal of the current lamp and execute the lighting task with decreasing brightness from near to far based on the distance to the current lamp. In response to the lamp receiving the vehicle sensing information of multiple lamps, the brightness in the lighting logic table is updated based on the corresponding maximum brightness in the vehicle sensing information of the multiple lamps, and the lighting task is executed based on the brightness. When a vehicle approaches a lamp, the lamp and its surrounding lamps can realize brightness gradient according to a preset algorithm. For example, the lamps closest to the vehicle light up at the highest brightness (such as 100%), and the lamps farther away gradually reduce their brightness according to the distance. For example, if the distance increases by 10 meters, the brightness decreases by 10%. This can form a bright and naturally transitional lighting area on the vehicle's driving path, avoiding local over-brightness or over-darkness, providing the driver with a clear line of sight and improving driving safety. As the vehicle moves in the tunnel, the lamps continuously update the lighting status according to the new position relationship. The lamps in front of the vehicle light up and adjust their brightness in turn, while the lamps behind gradually reduce their brightness or go out. The lighting area always follows the dynamic changes of the vehicle, achieving precise lighting control, effectively reducing energy waste, and improving the energy efficiency of the lighting system.

[0031] Combine the following Figure 2 and Figure 3 The above method is described in detail by the following specific embodiments:

[0032] Figure 2 FIG. 4 shows a schematic diagram of the layout of lamps in a tunnel according to a specific embodiment of the present invention. Figure 2 As shown, lamps are installed at intervals in a bidirectional tunnel, and each lamp has Figure 3 The logical structure of the lamp shown in the figure includes the main control MCU, BLE wireless RF module, vehicle sensing module (using microwave sensing technology) and LED lamp driver module. The main control MCU is electrically connected to the other three modules to ensure the normal interaction of data transmission and control signals. After the lamp is installed, it is powered on. After power-on, the main control MCU first initializes each module, including the communication parameter setting of the BLE wireless RF module, the sensitivity calibration of the vehicle sensing module, and the initial brightness setting of the LED lamp driver module.

[0033] Using BLE channel detection and ranging technology, each lamp begins to collect ADV broadcasts from nearby lamps of the same type to obtain the lamp type and lamp ID. Taking a certain lamp (such as the first lamp at the entrance of the first lane) as an example, after collecting the broadcast information of nearby lamps, select lamps of the same type with unknown distances one by one for BLE channel detection. Taking the nearest lamp as an example, accurate distance measurement is performed through RRT technology. After a series of signal transmission and calculation, the accurate distance between the two lamps is obtained, and this distance information is recorded in its own storage unit. In the same way, all lamps in the tunnel complete mutual distance measurement and establish a distance relationship network between lamps.

[0034] The lamps of the two-way lanes are configured by dialing. For the lamps of the first lane, the dial is set to a unified code (for example, 001); for the lamps of the second lane, a different code (for example, 010) is set. The lamps of different lanes are distinguished by dialing, laying the foundation for the subsequent lane differentiation control.

[0035] In a specific embodiment, when a vehicle enters a tunnel, for example, a vehicle enters from the entrance of the first lane, the vehicle sensing module (microwave sensing) on ​​the lamp at the entrance of the first lane detects the approach of the vehicle, and the lamp immediately lights up and sends vehicle sensing information in the lamp group of the first lane through the BLE module. The information contains information such as the lamp's own ID, position (which can be determined based on the pre-set correspondence between the lamp number and the position), and vehicle detection time. Due to the difference in the dial configuration, the lamp in the second lane will not receive the vehicle sensing information sent by the lamp in the first lane, thereby achieving the independence of the two-way lane lighting control and avoiding unnecessary lighting and energy waste. The lamps in the two lanes are distinguished by the dial code, and the vehicle sensing information or control signal sent by the lamp on one lane will not interfere with the other lane, effectively preventing problems such as the lamp being mistakenly lit or dimmed incorrectly due to signal crossing, ensuring that the lighting system of each lane operates stably and reliably, providing the driver with a clear and consistent visual environment, and reducing traffic safety hazards that may be caused by abnormal lighting.

[0036] In a specific embodiment, each lamp creates a lighting logic table when initialized, which contains the distance parameters, brightness parameters and enable status of the current lamp and its surrounding lamps. In the initial state, the enable status of all lamps is no, indicating that no vehicle is detected. Taking the lamp (set as lamp A) that detects a vehicle on the first lane as an example, after lamp A lights up, it periodically broadcasts ADV_NONCONN_IND trigger notification to the outside through the BLE wireless radio frequency part, and the broadcast carries the type and ID of this lamp. At the same time, lamp A starts the countdown task. During the countdown, lamp A continuously updates the enable status in its own lighting logic table to yes, and sets the current brightness to the highest brightness (for example, 100%). After receiving the broadcast information of lamp A, the lamps around lamp A (for example, lamp B and lamp C on the left side, lamp D and lamp E on the right side, etc., which are closer to lamp A in the same lane) process it according to the information in its own lighting logic table. First, the left lamps B and C and the right lamps D and E update the record corresponding to lamp A in the lighting logic table, set its enable state to yes, and calculate their own brightness according to the distance from lamp A. The left lamps B and C and the right lamps D and E light up according to the calculated brightness. For example, the left lamp B performs the brightness at 80%, the lamp C at 60%, the right lamp D at 80%, and the lamp E at 60%, achieving a gradual brightness effect, that is, the closer the lamp is to the vehicle, the brighter it is, and the farther the lamp is from the vehicle, the lower its brightness gradually becomes.

[0037] In a specific embodiment, for the lighting logic of multi-signal processing, if during the driving process of a vehicle, lamp B receives vehicle sensing information from other lamps (such as lamp F) in the same lane within a certain period of time. Lamp B compares the information of lamp F with the information of lamp A, calculates the brightness corresponding to lamp F according to the distance, compares the brightness values ​​corresponding to lamp A and lamp F, selects the larger brightness as its own final lighting brightness, and updates the brightness parameters in the lighting logic table. No matter how many vehicle sensing information the lamp receives, it always lights up at the maximum brightness that can ensure the lighting effect, ensuring that there is enough lighting brightness in the tunnel to meet driving safety requirements.

[0038] In a specific embodiment, when the vehicle leaves the sensing range of lamp A and the countdown task of lamp A ends, it stops sending trigger broadcasts periodically, updates the enable state in its own lighting logic table to no, and reduces the brightness to the initial state (e.g., 0%). When the surrounding lamps such as lamp B, lamp C on the left and lamp D, lamp E on the right do not receive the trigger information of lamp A for a period of time, they also set the enable state of lamp A in its lighting logic table to no, and adjust the brightness according to the information of other lamps in their own lighting logic table. If lamps B, lamp C on the left and lamp D, lamp E on the right do not receive the vehicle sensing information from other lamps at this time, they will also gradually reduce the brightness to the initial state. The whole process realizes intelligent collaborative control between lamps, dynamically adjusts the lighting state according to the actual position of the vehicle in the tunnel, and provides an efficient, energy-saving and comfortable lighting environment.

[0039] Through the above-mentioned implementation process, the tunnel lighting control method of the present application based on the tunnel lighting system of BLE channel detection can realize intelligent collaborative lighting control between lamps according to the actual position of the vehicle, provide efficient, energy-saving and comfortable lighting effects, and ensure the stability and reliability of the system.

[0040] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the present application is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the above invention concept. For example, the above features are replaced with the technical features with similar functions disclosed in this application (but not limited to) by each other to form a technical solution.

Claims

1. A method for controlling lighting in a tunnel, characterized in that: include: Acquire basic information of the lamps in the tunnel through broadcasting, and perform channel detection according to the basic information of the lamps to acquire relative distances between the lamps in the tunnel; In response to the sensor of the current lamp detecting a vehicle, a lighting event of the current lamp is triggered and a sensing signal is sent to surrounding lamps. The surrounding lamps perform a lighting task with gradual brightness change based on the distance from the current lamp. The lighting events of the lamps are independent of each other and the lighting task is performed with the maximum brightness in their own lighting events.

2. A method for controlling lighting in a tunnel according to claim 1, characterized in that: The lamps in the tunnel include two groups of lamps corresponding to the two-way lanes. The two groups of lamps are configured by dialing codes respectively. The lamps in the same lane have the same dialing codes, while the lamps in different lanes have different dialing codes.

3. A method for controlling lighting in a tunnel according to claim 1, characterized in that: The basic information includes the lamp type and the lamp ID, and BLE channel detection is performed on lamps of the same type to obtain the relative distance between the lamps.

4. A method for controlling lighting in a tunnel according to claim 1, characterized in that: The lighting event of the lamp is executed based on the lighting logic table of the lamp itself, and the lighting logic table includes distance parameters, brightness parameters and enabling states of the current lamp and surrounding lamps, and the enabling state is represented by whether the sensor of the current lamp detects a vehicle.

5. A method for controlling lights in a tunnel according to claim 4, characterized in that: In response to the sensor of the current lamp detecting a vehicle, the lamp periodically broadcasts ADV via BLE and performs a countdown task, updates the enable state of the current lamp to yes, and stops broadcasting and updates the enable state of the current lamp to no in response to the countdown task ending.

6. A method for controlling lights in a tunnel according to claim 5, characterized in that: The sensor of the current lamp detects the vehicle repeatedly, resetting the countdown task.

7. A method for controlling lights in a tunnel according to claim 4, characterized in that: The surrounding lamps receive the signal from the current lamp and perform lighting tasks with decreasing brightness from near to far based on the distance from the current lamp.

8. A method for controlling lights in a tunnel according to claim 7, characterized in that: In response to the lamp receiving vehicle sensing information from multiple lamps, the brightness in the lighting logic table is updated based on the corresponding maximum brightness in the vehicle sensing information from the multiple lamps, and the lighting task is executed based on the brightness.

9. A lighting control system for a tunnel, characterized in that: The invention comprises lamps arranged at intervals in a tunnel, wherein the lamps are provided with a main controller, a vehicle sensing module and a BLE module, and are used to execute the lamp control method according to any one of claims 1 to 8.

10. A lighting control system for use in a tunnel according to claim 9, characterized in that: The tunnel comprises a first lane and a second lane arranged in both directions, the lamps inside the first lane have the same dial code, the lamps inside the second lane have the same dial code, and the lamps between the first lane and the second lane are configured with different dial codes.

Images