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CN-122028248-A - Intelligent control system for inter-plant light supplementing lamp based on PWM dimming and wireless networking

CN122028248ACN 122028248 ACN122028248 ACN 122028248ACN-122028248-A

Abstract

The application discloses an inter-plant light supplementing lamp intelligent control system based on PWM light modulation and wireless networking, and relates to the technical field of plant light supplementing lighting control. The terminal utilizes the PWM driving unit to adjust the light intensity of the LED array and synchronously controls the active ventilation device to improve the microenvironment among plants. According to the application, through the deep integration of PWM dimming and wireless networking, the grid management and control of the greenhouse environment are realized, the photosynthetic efficiency of the middle and lower parts of plants is effectively improved, the gas diffusion rate is enhanced, the system wiring cost and the energy efficiency loss are reduced, and the accurate agricultural production is realized.

Inventors

  • LIU JIANMAO
  • LI JIAQIN
  • HE RIZHAN

Assignees

  • 深圳市朗文科技实业有限公司

Dates

Publication Date
20260512
Application Date
20260323

Claims (10)

  1. 1. The inter-plant light supplementing lamp intelligent control system based on PWM dimming and wireless networking is characterized by comprising a central management server, a wireless communication gateway, an environment data acquisition unit, a plurality of intelligent ventilation light supplementing terminals, a distributed power management unit and a mobile monitoring terminal; the environment data acquisition unit is configured to monitor environment parameters of the planting environment in real time, convert the environment parameters into digital environment messages and upload the digital environment messages to the central management server through the wireless communication gateway; The central management server is configured to store preset light formula data and generate pulse width modulation control instructions for each intelligent ventilation and light supplement terminal based on the digital environment message; The wireless communication gateway is configured to establish a transparent data transmission channel between the central management server and the intelligent ventilation light supplementing terminal and is responsible for managing network access authentication, topology structure updating and signal relay routing of each node; The intelligent ventilation and light supplementing terminal is internally integrated with a pulse width modulation driving unit, a light emitting diode array, an active ventilation device, a position sensor and a wireless communication module, dynamically adjusts the light output intensity by receiving a pulse width modulation control instruction, and synchronously adjusts the running state of the active ventilation device so as to improve the micro-environment circulation among plants; And the distributed power management unit is configured to provide electric energy for the system components and dynamically adjust the power output according to the load change of the intelligent ventilation light supplementing terminal.
  2. 2. The intelligent control system of the inter-plant light supplement lamp based on PWM dimming and wireless networking according to claim 1, wherein a processor cluster and a storage array are integrated in a central management server, and preset light formula data are stored in a form of a multi-dimensional index database, and comprise specific spectrum proportion, target luminous flux density and corresponding light period logic; The central management server is internally provided with an energy-saving prediction model, the energy-saving prediction model is configured to acquire weather forecast information in a specific future period through an external network interface, and predict the change trend of the natural illumination intensity in the future by combining a stored historical illumination curve, so that the output reference value in the pulse width modulation control instruction is adjusted in advance, and the overall power output of the system is reduced on the premise of ensuring that the total photosynthetic effective radiation accumulation amount of plants reaches a preset threshold value; the central management server also supports multi-user authority hierarchical management, different management accounts are divided according to geographic areas, and each account is given specific control authority to system components in the area to which the account belongs.
  3. 3. The intelligent control system of the inter-plant light supplement lamp based on PWM light modulation and wireless networking according to claim 1, wherein the wireless communication gateway has self-organizing network maintenance capability and fault self-healing logic; When the wireless communication gateway detects that the response losing time of a specific intelligent ventilation light supplementing terminal directly connected with the wireless communication gateway exceeds a preset time threshold, automatically triggering a network reconstruction request, instructing adjacent intelligent ventilation light supplementing terminals around to promote wireless transmitting power, and adjusting communication channel and time slot parameters according to a preset standby routing table so as to reestablish a communication link; a priority queue scheduling logic is operated in the wireless communication gateway, when the network load reaches a preset congestion threshold value, the issuing of a pulse width modulation control instruction is preferentially ensured, and a low-frequency environment state message is delayed in a time dimension; The wireless communication gateway also supports concurrent access of multiple heterogeneous network protocols and is provided with an interface for carrying out remote data synchronization with an external cloud platform.
  4. 4. The intelligent control system of the inter-plant light filling lamp based on PWM light modulation and wireless networking according to claim 1, wherein the environment data acquisition unit comprises a multi-point redundant sensing matrix, the multi-point redundant sensing matrix is composed of a plurality of sensing probes distributed on different space height layers of plants, and the sensing probes comprise an illumination intensity sensor, an air temperature sensor, an air humidity sensor and a carbon dioxide concentration sensor; After receiving the spatial data uploaded by the multipoint redundant sensing matrix, the central management server adopts weighted average logic to perform fusion processing so as to identify and remove abnormal sensor sampling caused by local shielding or local airflow disturbance; The environment data acquisition unit is configured to convert the acquired physical analog signals into digital environment messages with standard check bit and header formats, and periodically upload the digital environment messages according to a preset sampling frequency.
  5. 5. The intelligent control system of the inter-plant light supplementing lamp based on PWM light modulation and wireless networking according to claim 1 is characterized in that the intelligent ventilation light supplementing terminal is provided with a physical shell, the physical shell is made of a metal material with high heat conducting property, and the outer surface of the physical shell is provided with densely arranged radiating fins; The radiating fins and the internal active ventilation device are coupled in physical space to form an air cooling circulation path, so that forced air cooling and heat dissipation are realized when air flows through the internal heating component; the protection grade of the physical shell accords with the preset greenhouse high-humidity environment standard, the surface of the internal circuit board is coated with a three-proofing coating, and all external connector parts are packaged through sealing rubber rings; The vertical both ends of intelligent ventilation light filling terminal are equipped with standardized physical interface, and physical interface has integrated electrical connection spare and mechanical locking piece for a plurality of intelligent ventilation light filling terminals realize through cascading the mode that mechanical splice and circuit switch on, form continuous light filling lamp area.
  6. 6. The intelligent control system of the inter-plant light supplementing lamp based on PWM dimming and wireless networking according to claim 1, wherein the light emitting diode array consists of a plurality of independently controlled light source channels, the light color energy distribution corresponding to each light source channel is different, and the light source channels comprise a red light chip, a blue light chip, a far-red light chip and a full-spectrum white light chip; The pulse width modulation driving unit is configured to independently adjust the current duty ratios of different light source channels so as to realize the dynamic recombination of the output spectrum components; The physical structure of the LED array is distributed at the lateral direction of the intelligent ventilation and light supplementing terminal, the outer layer of the LED array is covered with a directional aspheric lens, and the directional aspheric lens is configured to collect and refract light beams emitted by the light source to a preset angle range, so that the light beams are projected to the bottom and middle blade areas of adjacent plants; The LED array is mounted on the circuit substrate with high heat conductivity coefficient.
  7. 7. The intelligent control system of the inter-plant light compensating lamp based on PWM light modulation and wireless networking according to claim 1, wherein the active ventilation device is arranged in a shell cavity of the intelligent ventilation light compensating terminal and is connected with the external environment through an air guide channel; The inside of the air guide channel is provided with a rectification structure, and the rectification structure is configured to convert the rotating air flow into a laminar flow state so as to improve the penetration depth of the air flow in the plant canopy; The central management server sends a frequency conversion instruction to the active ventilation device according to the monitored temperature and humidity data and preset wind speed regulation logic, and drives the active ventilation device to generate directional airflow so as to destroy an air static layer at the bottom of the plant; The air inlet of the active ventilation device is provided with a filter screen curtain, the intelligent ventilation light supplementing terminal evaluates the blocking degree of the filter screen curtain by monitoring counter-induced electromotive force and current ripple of the fan motor, and sends out maintenance reminding when the blocking degree exceeds a preset threshold value.
  8. 8. The intelligent control system of the inter-plant light supplementing lamp based on PWM light modulation and wireless networking according to claim 1, wherein the pulse width modulation driving unit is electrically connected between a power input end and the light emitting diode array and internally comprises a high-speed optocoupler isolation circuit and a power field effect transistor driving circuit; The pulse width modulation driving unit is configured to receive the digital duty ratio instruction, switch the on state of the power element in microsecond level, set the working frequency in a preset high-frequency range to avoid visual flicker, and is provided with an electromagnetic compatibility filter to inhibit harmonic components generated by the high-frequency switch; the pulse width modulation driving unit has smooth starting and smooth shutting functions, and current rises or falls according to a preset time gradient in the brightness adjustment process so as to reduce electromagnetic impact on a power supply network and prevent light shock influence on plants caused by light intensity jump.
  9. 9. The intelligent control system of the inter-plant light supplement lamp based on PWM light modulation and wireless networking according to claim 1, wherein the distributed power management unit adopts a distributed architecture and internally comprises a switch conversion circuit, a voltage stabilizing protection circuit, a current detection circuit, an active power factor correction circuit and a surge protection circuit; the distributed power management unit is configured to monitor load fluctuation of each power supply branch in real time and dynamically adjust compensation characteristics of output current according to real-time power requirements of the intelligent ventilation light supplementing terminal; the distributed power management unit also has a multistage protection function, including overvoltage protection, overcurrent protection and short circuit cut-off function, when any one intelligent ventilation light supplementing terminal has circuit fault, the distributed power management unit is configured to execute logic cut-off in a preset time trace, and isolate the fault node from the power supply network.
  10. 10. The intelligent control system of the inter-plant light supplementing lamp based on PWM light modulation and wireless networking according to claim 1, wherein the intelligent ventilation light supplementing terminal is provided with a universal adjustment holder which allows the irradiation main shaft of the light emitting diode array to be finely adjusted in the horizontal direction and the vertical direction, and an angle locking device is arranged in the intelligent ventilation light supplementing terminal; The position sensor is integrated on a bracket structure of the intelligent ventilation and light supplementing terminal, is configured to sense the height of the lamp in the vertical direction and the horizontal distance relative to the plant trunk, and feeds back coordinate information to the central management server; the mobile monitoring terminal is configured with a visual interaction interface, the interaction interface comprises a lamp array dynamic chart based on a digital twin technology, and a user is allowed to select a specific lamp set through touch operation and conduct batch parameter configuration; The intelligent ventilation light supplementing terminal is also integrated with a fault self-diagnosis circuit, and is configured to monitor loop impedance of the light emitting diode array in real time and send fault location codes through a wireless network when an abnormal state is identified.

Description

Intelligent control system for inter-plant light supplementing lamp based on PWM dimming and wireless networking Technical Field The invention relates to the technical field of plant light filling illumination control, in particular to an inter-plant light filling lamp intelligent control system based on PWM dimming and wireless networking. Background With the crossing development of modern agricultural technology, plant illumination is used as a key link of intelligent agriculture, and has become a key means for overcoming the shortage of natural illumination and improving the yield and quality of crops. In a greenhouse planting environment, the LED artificial light source is utilized to simulate a specific spectrum required by plant growth, so that photosynthesis duration can be remarkably prolonged, and light energy conversion efficiency can be enhanced. The artificial auxiliary lighting system not only reduces the production energy consumption, but also realizes the transformation of crop production from natural environment dependence to industrial precise regulation and control through precise control of photoperiod. The inter-plant light supplementing technology is used as a subdivision direction for three-dimensional planting and long-stalk crops, and aims to solve the problem of uneven light intensity distribution by arranging light sources among plant layers. The intelligent control system can realize brightness adjustment and cooperative linkage of the large-scale lamp array by matching with the pulse width modulation technology and the wireless communication network. The development of the system is initially to provide a personalized light formula according to the real-time growth state of crops, so that a more balanced illumination environment is constructed in the vertical dimension, and the physiological metabolism of the whole plant is ensured to be at an optimal level. However, the inter-plant light supplementing scheme in the prior art still presents obvious limitations when dealing with complex plant forms, and the bottom illumination intensity still has difficulty in reaching a light compensation point due to the natural shading of the top leaves, so that the yield increasing potential of commercial crops is severely limited. Meanwhile, the existing lamp structure is mostly of a closed design, lacks ventilation functions interacting with plant microenvironments, leads to blocking of air circulation at the bottom of a plant and causes temperature and humidity unbalance, and further inhibits normal growth of roots and stems. In addition, the traditional control system has the defects in the aspects of stability of wireless networking and sensitivity of dimming response, and a flexible modularized connection mechanism is lacked among lamps, so that the system is complicated to install and deploy and high in later maintenance cost. Therefore, an intelligent control system for the inter-plant light supplement lamp based on PWM dimming and wireless networking is desired. Disclosure of Invention Aiming at the defects of the prior art, the invention provides an inter-plant light supplementing lamp intelligent control system based on PWM dimming and wireless networking, which solves the problems in the background art. The invention is realized by the following technical scheme that the inter-plant light supplementing lamp intelligent control system based on PWM dimming and wireless networking comprises a central management server, a wireless communication gateway, an environment data acquisition unit, an intelligent ventilation light supplementing terminal, a distributed power management unit and a mobile monitoring terminal, wherein: The central management server is configured to store preset light formula data required by plant growth, receive real-time environment parameters from the environment data acquisition unit, generate pulse width modulation control instructions for each intelligent ventilation light supplementing terminal through logic operation, and coordinate task scheduling and historical data records of the whole system. The wireless communication gateway is configured to establish a transparent data transmission channel between the central management server and the intelligent ventilation and light supplementing terminal, has self-organizing network maintenance capability and is responsible for managing network access authentication, topology structure updating and signal relay routing of each subordinate node. The environment data acquisition unit is configured to monitor the illumination intensity, the air temperature, the air humidity and the carbon dioxide concentration in the planting environment in real time, convert the acquired physical analog signals into digital environment messages, and periodically upload the digital environment messages to the central management server through the wireless communication gateway. The intelligent ventilation light filling terminal is u