Traveling speed self-adaptive non-inductive dimming method and system based on multi-sensor fusion

Abstract

The invention belongs to the technical field of intelligent lighting control, and relates to a traveling speed self-adaptive non-inductive dimming method and system based on multi-sensor fusion, the method comprises the steps that a lighting node detects a target, judges the target condition and the walking speed of the target and outputs different dimming control instructions, and the system comprises a sensor layer, a communication layer and a control layer. Through complementary detection of the infrared sensor and the millimeter-wave radar sensor, the misjudgment problem of a single sensor (for example, radar penetrates through clothes to interfere, and infrared rays are blocked and fail) is solved; the self-adaptive dynamic illumination control aiming at the advancing speeds of different crowds gives consideration to energy-saving and non-inductive experience; the BLE Mesh network is adopted, each lighting node is independently arranged and communicates with each other, and the situation that dynamic dimming of lighting cannot be met in time due to the fact that a certain lighting node breaks down is avoided.

Description

Technical Field

[0001] The present invention relates to the field of intelligent lighting control technology, and in particular to a traveling speed adaptive sensorless dimming method and system based on multi-sensor fusion. Background Art

[0002] Traditional office building lighting systems typically rely on voice control, but these systems currently suffer from the following issues: 1. Relying on a single sensor (such as infrared) results in a high false trigger rate and is unable to distinguish crowd characteristics (such as walking speed and height), resulting in energy waste from "one person turning on all lights" or "lights remaining on after a person leaves." 2. Fixed brightness or simple zone control systems struggle to adapt to diverse scenarios (e.g., elderly people moving slowly need to turn on lights in advance, while tall people with long strides require a quick response). 3. Traditional Bluetooth or WiFi networks have limited coverage, making them difficult to support large-scale sensor node collaboration.

[0003] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present invention, and therefore may include information that does not constitute prior art known to ordinary technicians in this field. Summary of the Invention

[0004] The purpose of the present invention is to solve the technical problems existing in the background technology. To this end, a travel speed adaptive and non-sensing dimming method and system based on multi-sensor fusion is provided, which can realize adaptive lighting control for different travel speeds of people, taking into account both energy saving and non-sensing experience.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is as follows: The traveling speed adaptive sensorless dimming method based on multi-sensor fusion includes the following steps: Step S1: Arrange multiple lighting nodes in a set lighting travel area, where each lighting node includes multiple lamps; Step S2: The lighting node obtains and processes target information through the infrared sensor and radar sensor respectively to determine whether there is a target; Step S3: If no target is detected, the lighting node outputs a dimming control instruction for minimum illumination; If a target is detected, the adjacent lighting nodes are informed that a target has entered. At the same time, the lighting nodes determine whether any of the following conditions exist: the target is an elderly person, the target contains an elderly person; Step S4: If yes, the lighting node outputs a dimming control instruction for maximum illumination; if no, the lighting node identifies the target's walking speed and determines whether the target's walking speed exceeds a threshold; Step S5: If the target's walking speed exceeds the threshold, the lighting node outputs a dimming control instruction for illumination mode 1; if the target's walking speed does not exceed the threshold, the lighting node outputs a dimming control instruction for illumination mode 2; Step S6: When the target reaches the next lighting node, the previous lighting node outputs a dimming control instruction for minimum illumination, and the next lighting node repeats steps S2-S5 until the target leaves the lighting travel area; Step S7: When the target leaves the illuminated area, all lighting nodes output a dimming control instruction for minimum illumination.

[0006] The following is a technical solution further limited by the method of the present invention. In step S1, if the illuminated travel area is an area that does not require illumination during the day, the system is not started; if the illuminated travel area is an area that requires illumination during the day, the system is started.

[0007] The following is a technical solution further defined by the method of the present invention, in which the minimum illumination output by the lighting node is 10%-20%, wherein the minimum illumination output by the lighting node in the lighting travel area when the system is started during the day is 10%, and the minimum illumination output by the lighting node in the lighting travel area when the system is started at night is 20%.

[0008] The following is a technical solution further defined by the method of the present invention, where the maximum illumination output by the lighting node is 100%.

[0009] The following is a technical solution further defined by the method of the present invention, and illumination mode 1 includes: the front and rear lighting nodes of the target use an exponential decay function to control the brightness, wherein the lighting node at the target location has the highest brightness; the lighting node in front of the target gradually increases in brightness as the distance to the target decreases, and the lighting node behind the target gradually decreases in brightness as the distance to the target increases.

[0010] The following is a technical solution further defined by the method of the present invention, and illumination mode two includes: the brightness of the lamps in front and behind the target at the current lighting node is controlled by an exponential decay function, wherein the brightness of the lamp at the target position is the highest and the moving speed of the lamp with the highest brightness is the same as the moving speed of the target, the brightness of the lamp in front of the target gradually increases as the distance from the target decreases, and the brightness of the lamp behind the target gradually decreases as the distance from the target increases, and the distance between the lamp and the target is related to the moving speed of the target.

[0011] The traveling speed adaptive sensorless dimming system based on multi-sensor fusion is used to implement the above-mentioned traveling speed adaptive sensorless dimming method based on multi-sensor fusion, including: The sensor layer includes infrared sensors and radar sensors to detect the presence, height, and walking speed of the target; The communication layer uses BLE Mesh network communication, relay nodes dynamically optimize signal paths, and lighting nodes connect to the cloud management platform; At the control layer, the central controller of each lighting node runs a multi-sensor data fusion algorithm to process target information and calculate the target position, speed and dimming strategy in real time.

[0012] The following is a technical solution further defined by the system in the present invention, in which each lighting node has an independent central controller for independent settings, and the lighting nodes can communicate directly with each other without the need for indirect communication through a cloud management platform.

[0013] Compared with the prior art, the present invention has the following technical effects: This invention solves the problem of single sensor misjudgment (such as radar interference due to penetration of clothing and infrared failure due to obstruction) through complementary detection of infrared sensors and millimeter-wave radar sensors; adaptive dynamic lighting control for different crowd speeds takes into account both energy saving and a seamless user experience; and using a BLE Mesh network, each lighting node is independently configured and communicates with each other, avoiding the failure of a lighting node to meet the dynamic dimming requirements in a timely manner.

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0016] Figure 1 It is a flow chart of the method of the present invention. DETAILED DESCRIPTION

[0017] To make the above-mentioned objects, features, and advantages of the present invention more readily apparent, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings. The following description sets forth numerous specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0018] This embodiment provides a speed-adaptive sensorless dimming system based on multi-sensor fusion, including: The sensor layer, including infrared and millimeter-wave radar sensors, is deployed in each lighting node to detect target presence, height, and walking speed. The lighting node integrates a BLE 5.3 master-slave module, infrared sensors, and radar sensors, supporting dynamic dimming and data relay.

[0019] The communication layer uses BLE Mesh network communication. The BLE Mesh network adopts the "flood-management routing" mechanism. The relay nodes dynamically optimize the signal path. The lighting nodes (each lighting node is set independently and can communicate directly with each other without indirect communication through the cloud management platform) are connected to the cloud management platform.

[0020] At the control layer, the central controller (embedded AI chip) of each lighting node runs a multi-sensor data fusion algorithm to process target information and calculate the target position, speed and dimming strategy in real time.

[0021] The BLE Mesh network supports the following key features: 1. Multipath communication: Data can be transmitted along paths between different lighting nodes. 2. Self-healing network: If a lighting node fails, the system automatically selects paths through other lighting nodes to maintain communication. 3. Hierarchical address management: Efficient message distribution is achieved through group addresses, unicast addresses, and virtual addresses. Specifically, lighting nodes calculate the physical distance between each relay node and the target light tube, prioritizing the closest node to minimize signal attenuation. Relay nodes continuously monitor the signal strength (RSSI) of neighboring lighting nodes and prioritize the node with the strongest signal as the next hop. When signal strength is weak, the broadcast cycle interval is reduced to improve the success rate of transmission. Lighting nodes measure the workload of their own forwarding tasks. If the current lighting node's light tube load exceeds a threshold, it suspends relay participation and allows other idle nodes to take over. When the load exceeds the threshold, the broadcast cycle interval is reduced to improve the real-time performance of broadcasts. The cloud management platform records the stability data of each lighting node's path (such as the packet loss rate over the past 24 hours) and regularly pushes optimal path recommendations to the proxy node. Abnormal lamp current (such as fluctuations exceeding ±15%) provides early warning of potential failures, guiding relay nodes to avoid high-risk paths. Additional relay nodes are activated only when signal instability is detected (such as RSSI fluctuations exceeding ±10dBm), maintaining the basic path at other times. When a lighting node detects that the packet loss rate on a certain path exceeds 15% (such as 2 heartbeats lost in 10), it immediately triggers path switching and transmits data through the backup relay node. All lighting nodes send a heartbeat packet every 1 second. If a lighting node does not respond for 3 consecutive times, it is marked as a faulty node, and the network automatically bypasses this node and reselects a new path. The number of hops for flooding messages is controlled (such as a maximum of 3 hops). Messages that exceed the range are discarded to avoid network congestion.

[0022] like Figure 1 As shown, a traveling speed adaptive sensorless dimming method based on multi-sensor fusion is provided, comprising the following steps: Step S1: Arrange multiple lighting nodes in the set lighting travel area, where one lighting node includes multiple lamps; if the lighting travel area is an area that does not require lighting during the day, do not start the system; if the lighting travel area is an area that requires lighting during the day, start the system.

[0023] Step S2: The lighting node obtains target information through infrared sensors and radar sensors respectively and processes the target information based on the travel speed classification model to determine whether there is a target.

[0024] Based on the radar Doppler frequency shift and infrared trigger timing, stride length and frequency features were extracted, and the SVM classifier was used to distinguish tall people (>1.2 steps / second), short people (0.8-1.2 steps / second), and the elderly / disabled (<0.8 steps / second).

[0025] Step S3: If no target is detected, the lighting node outputs a dimming control instruction for minimum illumination; the minimum illumination output by the lighting node is 10%-20%, wherein the minimum illumination output by the lighting node in the lighting travel area when the system is started during the day is 10%, and the minimum illumination output by the lighting node in the lighting travel area when the system is started at night is 20%.

[0026] If a target is detected, the adjacent lighting nodes are informed that a target has entered. At the same time, the lighting nodes determine whether any of the following conditions exist: the target is an elderly person, or the target contains an elderly person.

[0027] Step S4: If yes, the lighting node outputs a dimming control instruction of maximum illumination, and the maximum illumination output by the lighting node is 100%. If no, the lighting node identifies the walking speed of the target and determines whether the walking speed of the target exceeds the threshold; Step S5: If the target's walking speed exceeds the threshold, the lighting node outputs a dimming control instruction for illumination mode 1. Illumination mode 1 includes: the front and rear lighting nodes of the target use an exponential decay function to control the brightness, wherein the lighting node at the target's location has the highest brightness; the lighting node in front of the target gradually increases in brightness as the distance to the target decreases, and the lighting node behind the target gradually decreases in brightness as the distance to the target increases.

[0028] If the target's walking speed does not exceed the threshold, the lighting node outputs the dimming control instruction of illumination mode 2; illumination mode 2 includes: the brightness of the lamps in front and behind the target at the current lighting node is controlled by an exponential decay function, wherein the lamp at the target's position has the highest brightness and the moving speed of the lamp with the highest brightness is the same as the target's travel speed, the brightness of the lamp in front of the target gradually increases as the distance to the target decreases, and the brightness of the lamp behind the target gradually decreases as the distance to the target increases, and the distance between the lamp and the target is related to the target's travel speed.

[0029] The exponential decay function formula is as follows:

[0030] Where d is the distance from the current lighting node, k is the attenuation coefficient, which controls the attenuation speed, and Lmax is the maximum initial light intensity at d=0 after the light is turned on.

[0031] Step S6: When the target reaches the next lighting node, the previous lighting node outputs a dimming control instruction for minimum illumination, and the next lighting node repeats steps S2-S5 until the target leaves the lighting travel area; Step S7: When the target leaves the illuminated area, all lighting nodes output a dimming control instruction for minimum illumination.

[0032] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Any person skilled in the art can utilize the methods and technical contents disclosed above to make many possible variations and modifications to the technical solutions of the present invention without departing from the scope of the technical solutions of the present invention, or modify them into equivalent embodiments with equivalent variations. Therefore, any equivalent variations made in accordance with the shape, structure, and principles of the present invention without departing from the content of the technical solutions of the present invention should be included in the scope of protection of the present invention.

Claims

1. A speed-adaptive sensorless dimming method based on multi-sensor fusion, characterized in that: The following steps are involved: Step S1: Arrange multiple lighting nodes in a set lighting travel area, where each lighting node includes multiple lamps; Step S2: The lighting node obtains and processes target information through the infrared sensor and radar sensor respectively to determine whether there is a target; Step S3: If no target is detected, the lighting node outputs a dimming control instruction for minimum illumination; If a target is detected, the adjacent lighting nodes are informed that a target has entered. At the same time, the lighting nodes determine whether any of the following conditions exist: the target is an elderly person, the target contains an elderly person; Step S4: If yes, the lighting node outputs a dimming control instruction for maximum illumination; if no, the lighting node identifies the target's walking speed and determines whether the target's walking speed exceeds a threshold; Step S5: If the target's walking speed exceeds the threshold, the lighting node outputs a dimming control instruction for illumination mode 1; if the target's walking speed does not exceed the threshold, the lighting node outputs a dimming control instruction for illumination mode 2; Step S6: When the target reaches the next lighting node, the previous lighting node outputs a dimming control instruction for minimum illumination, and the next lighting node repeats steps S2-S5 until the target leaves the lighting travel area; Step S7: When the target leaves the illuminated area, all lighting nodes output a dimming control instruction for minimum illumination.

2. The method for adaptive speed-sensing dimming based on multi-sensor fusion according to claim 1, characterized in that: In step S1 , if the illuminated area is an area that does not require illumination during the day, the system is not activated; if the illuminated area is an area that requires illumination during the day, the system is activated.

3. The method for adaptive speed-sensing dimming based on multi-sensor fusion according to claim 1, wherein: The minimum illumination output by the lighting node is 10%-20%, among which the minimum illumination output by the lighting node in the lighting travel area when the system is started during the day is 10%, and the minimum illumination output by the lighting node in the lighting travel area when the system is started at night is 20%.

4. The method for adaptive speed-sensing dimming based on multi-sensor fusion according to claim 1, wherein: The maximum illumination output by a lighting node is 100%.

5. The method for adaptive speed-sensing dimming based on multi-sensor fusion according to claim 1, wherein: Illumination mode 1 includes: the front and rear lighting nodes of the target use an exponential decay function to control the brightness, among which the lighting node at the target location has the highest brightness; the lighting node in front of the target gradually increases in brightness as the distance to the target decreases, and the lighting node behind the target gradually decreases in brightness as the distance to the target increases.

6. The method for adaptive speed-sensing dimming based on multi-sensor fusion according to claim 1, wherein: Illumination mode 2 includes: the brightness of the lamps in front and behind the target at the current lighting node is controlled by an exponential decay function, wherein the lamp at the target position has the highest brightness and the moving speed of the lamp with the highest brightness is the same as the target's travel speed. The brightness of the lamp in front of the target gradually increases as the distance to the target decreases, and the brightness of the lamp behind the target gradually decreases as the distance to the target increases. The distance between the lamp and the target is related to the target's travel speed.

7. A travel speed adaptive sensorless dimming system based on multi-sensor fusion, used to implement the travel speed adaptive sensorless dimming method based on multi-sensor fusion according to any one of claims 1 to 6, characterized in that: include: The sensor layer includes infrared sensors and radar sensors to detect the presence, height, and walking speed of the target; The communication layer uses BLE Mesh network communication, relay nodes dynamically optimize signal paths, and lighting nodes connect to the cloud management platform; At the control layer, the central controller of each lighting node runs a multi-sensor data fusion algorithm to process target information and calculate the target position, speed and dimming strategy in real time.

8. The speed-adaptive sensorless dimming system based on multi-sensor fusion according to claim 7, characterized in that: Each lighting node has an independent central controller for independent settings, and lighting nodes can communicate directly with each other without the need for indirect communication through a cloud management platform.

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