Insecticidal device and method based on hybrid LED array and dynamic spatiotemporal coupling

Abstract

The present application relates to the technical field of physical control of agricultural storage pests, and particularly relates to a kind of insecticidal device and method based on mixed LED array and dynamic spectrum space-time coupling. The specific technical scheme is: the insecticidal device based on mixed LED array and dynamic spectrum space-time coupling, including mixed LED unit, the mixed LED unit is provided with multiple, array formation mixed LED array board on substrate, the mixed LED unit includes three-wavelength LED, wavelength is 467nm, 550nm and 404nm respectively. The present application solves the technical problem of low fruit fly life cycle killing efficiency caused by single and fixed spectrum of existing blue light insecticidal lamp.

Description

Technical Field

[0001] This invention relates to the field of physical control technology for agricultural storage pests, specifically to an insecticidal device and method based on hybrid LED arrays and dynamic spectral spatiotemporal coupling. Background Technology

[0002] Fruit flies are boring pests. Adults lay eggs under the skin of blueberries, and the larvae feed inside the fruit. After maturing, they emerge from the blueberry to pupate. Their damage is insidious and difficult to detect. Fresh blueberries that are not sold immediately are sent to warehouses for short-term preservation. During storage, fruit flies are often difficult to find. At the same time, large-scale, concentrated storage of blueberries provides a rich food source for fruit flies. Conventional chemical pesticide spraying is very likely to cause excessive pesticide residues in blueberries, making it unsuitable for controlling fruit flies during storage. Physical methods such as sticky traps and sugar-vinegar solutions are only effective against adult fruit flies and cannot kill fruit fly larvae that have already burrowed into the blueberries.

[0003] Studies have found that specific wavelengths are effective in controlling fruit flies. Currently, the main blue light insecticidal technologies for controlling fruit flies in blueberry storage include:

[0004] (1) Fixed wavelength blue light insecticidal lamp: It adopts a planar array 467nm LED light source (wavelength error ±5nm), with 8-10 20W lamp beads per square meter, and maintains 800-1200μW / cm through a constant current drive circuit. 2 Light intensity. The insecticidal component is a surround-type high-voltage grid (2000V, 8mm grid spacing). In application scenarios, it is mainly suspended from the ceiling of storage spaces (1.5-2m from the shelves) to continuously irradiate and kill adult insects. However, fixed-wavelength lamps only achieve a 38% DNA damage rate to fruit fly eggs (>70% is required for effectiveness), while the larval survival rate is as high as 82%. The main reasons are: ① A single-wavelength LED array (e.g., 467nm) cannot excite photosensitive substances (e.g., riboflavin) within the fruit peel; ② The light source wavelength bandwidth is too wide (±5nm), deviating from the peak sensitivity of fruit fly rhodopsin (precisely requiring 467±1nm); ③ There is no auxiliary wavelength band (e.g., 404nm) to enhance light penetration, resulting in the light intensity under the fruit peel attenuating to 12% of the surface value.

[0005] (2) Dual-band combined insecticidal lamp: integrates 450nm+470nm dual-wavelength LED modules (each occupying 50% of the area), achieving alternating illumination through a mechanically rotating light-shielding plate. Equipped with a wind-suction insect-catching device (wind speed 2m / s, power 120W), the insect collection efficiency is approximately 65%. Its control method is based on a fixed working mode of a timer (turning on daily from 18:00 to 06:00). However, when the blueberry pile height is >1.5m, the killing efficiency of the dual-band lamp drops to 41% in the middle and lower layers. This is because: ① the planar light source is fixedly installed (elevation angle 0°), and the light cannot penetrate the densely stacked fruit; ② the high-voltage grid is located outside the lamp, which can only kill adult insects with a flight height >30cm; ③ there is no pile height detection module, and the light intensity gradient is not adjustable (surface layer 1200μW / cm). 2 →The bottom layer has only 180μW / cm 2 ).

[0006] (3) Broad-spectrum insect-attracting lamp: Uses white LED (color temperature 6500K) with a filter to generate a broad spectrum of 400-550nm, with uniform light intensity distribution (500-800μW / cm²). 2 The structure consists of a cylindrical lamp tube (15cm in diameter and 1m in length) covered with a shatterproof PC cover. Its insecticidal mechanism relies on insects' phototaxis to attract them to the sticky insect board at the bottom (replacement cycle 7 days). However, the energy consumption per insect killed by the broadband lamp is 0.8W / insect, three times that of chemical control. The reasons are: ① severe energy waste in the white LED spectrum (only 23% of the energy is distributed in the effective wavelength); ② continuous full-power operation (average daily energy consumption 2.2kW·h / m). 2 ) No pulse energy-saving mechanism; ③ The heat dissipation structure is simple (aluminum substrate thickness 1mm), resulting in light decay rate >15% / month.

[0007] Therefore, there is currently no effective solution to the problem of fruit fly control during storage. Once this problem is solved, it will provide reliable technical support for the preservation and storage of berries. Summary of the Invention

[0008] To address the shortcomings of existing technologies, this invention provides an insecticidal device and method based on hybrid LED arrays and dynamic spectral spatiotemporal coupling, which solves the technical problem of low killing efficiency of fruit flies throughout their entire life cycle caused by the single and fixed spectrum of existing blue light insecticidal lamps.

[0009] To achieve the above objectives, the present invention provides the following technical solution:

[0010] This invention discloses an insecticidal device based on hybrid LED array and dynamic spectral spatiotemporal coupling, including hybrid LED units. Multiple hybrid LED units are arranged in an array on a substrate to form a hybrid LED array plate. Each hybrid LED unit includes three-wavelength LEDs with wavelengths of 467nm, 550nm and 404nm, respectively.

[0011] Preferably, the hybrid LED unit includes two LEDs with a wavelength of 467nm, one LED with a wavelength of 404nm, and one LED with a wavelength of 550nm. Each hybrid LED unit is arranged in a 2×2 matrix, and each LED is electrically interconnected.

[0012] Preferably, a temperature sensor is provided on the back of each of the hybrid LED units.

[0013] Preferably, the LED surface with a wavelength of 467nm is covered with a hemispherical microlens with a curvature radius of 1.5mm and a diameter of 1mm; the LED surfaces with wavelengths of 404nm and 550nm are covered with asymmetric aspherical lenses to produce elliptical light spots with a major axis of 5mm and a minor axis of 3mm.

[0014] Preferably, the LEDs on the hybrid LED array board are driven by an FPGA time-division multiplexing control algorithm, and each hybrid LED unit is controlled by polling in 10ms time slices, and the turn-on timing of the three wavelength LEDs in each hybrid LED unit is controlled.

[0015] Preferably, the central area and the edge of the hybrid LED array board are covered with fans, and the speed of the fans is 3000 to 6000 rpm.

[0016] Correspondingly, the insecticidal method based on hybrid LED arrays and dynamic spectral spatiotemporal coupling includes the following steps:

[0017] (1) Adult killing stage

[0018] The hybrid LED array is driven by an FPGA time-division multiplexing control algorithm, and each hybrid LED unit is polled and controlled in 10ms time slices to ensure that the 467nm and 550nm bands are alternately activated.

[0019] (2) Larval extermination stage

[0020] The FPGA control logic shuts down all 550nm LEDs and enables LEDs with wavelengths of 467nm and 404nm, ensuring that the 404nm light intensity in each hybrid LED unit reaches 250μW / cm² from the blueberry surface to the bottom layer. 2 ~150μW / cm 2 The decay gradient.

[0021] Preferably, in step (1), only two LEDs with a wavelength of 467nm are allowed to operate at full power in each time slice, while one LED with a wavelength of 550nm is lit with a duty cycle of 30-50%.

[0022] Preferably, in step (2), two LEDs with a wavelength of 467nm are lit with an 80% duty cycle in each of the hybrid LED units, and one LED with a wavelength of 404nm is lit with a 25% duty cycle.

[0023] The present invention has the following beneficial effects:

[0024] This invention utilizes blue light lamps suspended in the storage environment to kill fruit fly eggs and larvae in blueberries, while simultaneously inhibiting adult fruit fly egg-laying. This method significantly delays blueberry rot caused by fruit flies in the storage environment, thereby increasing the commercial value of the fresh fruit. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the hybrid LED array board structure of the present invention. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] Unless otherwise specified, the technical means used in the implementation examples are conventional means well known to those skilled in the art.

[0028] This invention proposes a blue light insecticidal technology based on a hybrid LED array and dynamic spectral spatiotemporal coupling. By integrating three-wavelength LEDs on the same planar substrate through differentiated optical design and intelligent dimming algorithms, it overcomes the technical bottleneck of traditional insecticidal lamps that only target adult insects. Specifically, it includes:

[0029] (1) Multi-wavelength synergistic killing mechanism

[0030] The system is constructed based on the biological principles of specific spectra: 467nm blue light serves as the core killing band, stimulating the activity of cytochrome P450 enzymes in fruit flies, inducing reactive oxygen species (ROS) concentrations to exceed 8 mmol / kg within 20 minutes, leading to mitochondrial membrane potential collapse and cell membrane lipid peroxidation; the 404nm ultraviolet-blue light band, with its high photon energy, penetrates the blueberry epidermis 0.5–1.2 mm, activating photosensitive substances such as riboflavin inside the fruit, generating hydroxyl radicals (·OH) that target the chitinous layer of larvae, causing osmotic pressure imbalance and death; the 550nm yellow-green light band utilizes the sensitivity difference of the fruit fly compound eye opsin OP3 to the 550–570nm spectrum, creating a repulsion effect during the active period of adults, driving more than 85% of individuals to the preset high-intensity blue light killing area. These three bands work synergistically in time and space to precisely target the biological weaknesses of eggs, larvae, and adults.

[0031] (2) Dynamic spectral coupling technology

[0032] This system achieves intelligent spectral adaptation based on a time-division multiplexing (TDDM) control algorithm. Its core incorporates a dual control mechanism: firstly, FPGA hardware polls and controls the activation sequence of three-wavelength LEDs in 10ms time slices, dynamically adjusting the intensity ratio of 467nm to 550nm to 22.5:1 during the adult stage (17:00-20:00). (This ratio is based on irradiance (μW / cm²). 2 ): 467nm LED full power output (750μW / cm² per LED) 2 Two of them together have a total of 1500 μW / cm 2 550nm LEDs have a duty cycle of 30%-50% (40-66.7μW / cm² per LED). 2 The value is 66.7 μW / cm³ when the median is 50% of the median. 2 Therefore, 1500:66.7 ≈ 22.5:1. During the larval stage (22:00-04:00), the light intensity is switched to a 6:1 ratio of 467nm and 404nm, with a spectral switching delay of less than 1ms. On the other hand, millimeter-wave radar scans the shelf stack height data in real time, automatically constructing a three-layer light intensity gradient (surface layer 1500-2500μW / cm²) when the blueberries are stacked above 2m. 2 Middle layer 800-1200μW / cm 2 500-800μW / cm at the bottom layer 2 In conjunction with temperature rise feedback from a temperature sensor (such as an infrared temperature sensor), the instantaneous light intensity at 467nm is increased to 2500μW / cm² in pulse mode. 2 To enhance the thermal effect, the larval metabolic rate was increased by 3.2 times, and the time of epidermal oxidative damage was shortened to 35% of that under normal conditions.

[0033] A three-layer light intensity gradient is constructed: a hybrid LED array panel is suspended from the top of the warehouse, 0.5-1m above the blueberry stacks, with a 2m x 2m spacing between the panels covering the entire warehouse area. The three-layer light intensity gradient is constructed through a zoned control strategy using the hybrid LED array panel; the system automatically builds three layers of light intensity gradient based on the blueberry stack height. For example, the surface light intensity is 1500-2500 μW / cm². 2 The light intensity is achieved through the full-power operation of the central 4×4 unit of the array plate, covering the surface area of ​​the blueberry pile and ensuring that the 467nm light intensity peak penetrates the fruit skin; the light intensity in the middle layer (800-1200μW / cm²) is also sufficient. 2 The LEDs in the central ring area operate at a 60% duty cycle, creating a transitional light field that adapts to the activity depth of larvae in the middle layer of the fruit; the light intensity at the bottom layer is 500-800 μW / cm². 2 The edge LEDs are illuminated with a 30% duty cycle to maintain the minimum kill threshold for the underlying blueberries, while reducing light energy waste at the edges. The light intensity of each layer is dynamically adjusted via FPGA to ensure a balance between light field penetration and energy consumption optimization.

[0034] Temperature sensors are integrated on the back of the hybrid LED unit (one per unit) to directly monitor the LED chip temperature, with the aim of providing real-time feedback on the center temperature of the light spot (10cm from the LED surface).

[0035] (3) Basic structure of hybrid LED array board

[0036] refer to Figure 1 As shown, the system includes multiple hybrid LED units arranged in an array on a substrate to form a hybrid LED array board. Each hybrid LED unit includes three-wavelength LEDs with wavelengths of 467nm, 550nm, and 404nm. Specifically, each hybrid LED unit includes two 467nm LEDs, one 404nm LED, and one 550nm LED. Each hybrid LED unit is arranged in a 2×2 matrix, and each LED is electrically interconnected.

[0037] Furthermore, the LED surface with a wavelength of 467nm is covered with a hemispherical microlens with a curvature radius of 1.5mm and a diameter of 1mm; the LED surfaces with wavelengths of 404nm and 550nm are covered with asymmetric aspherical lenses to produce elliptical light spots with a major axis of 5mm and a minor axis of 3mm.

[0038] More specifically: The substrate and hybrid LED unit layout utilize high thermal conductivity aluminum nitride ceramic material with a thermal conductivity ≥180W / m·K. The substrate size is 60cm×60cm×3mm, and it is precision-machined into 64 independent units in an 8×8 array. Each unit is arranged in a 2×2 matrix with a horizontal and vertical spacing of 10mm. Each unit integrates two Cree XLamp XP-E3 type 467nm LEDs (peak wavelength 465~469nm), one Nichia NS6L083AT type 404nm LED (peak wavelength 402~406nm), and one Osram Oslon SSL type 550nm LED (peak wavelength 548~552nm). Electrical interconnection is achieved through gold wire bonding technology to ensure the accuracy and stability of wavelength combination.

[0039] The optical system is optimized through differentiated microlens design and multilayer coating technology. For the 467nm LED, a hemispherical microlens with a curvature radius of 1.5mm and a diameter of 1mm is used to cover the surface, increasing the vertical light intensity by 40%. For the 404nm and 550nm LEDs, asymmetric aspherical lenses are used, and the elliptical spot design with a major axis of 5mm and a minor axis of 3mm expands the lateral coverage by 60%. The bottom of the substrate employs a ten-layer TiO2 / SiO2 alternating coating process (total thickness 1.2μm), achieving a band isolation of >45dB within a 10nm spectral bandwidth, while maintaining a reflectivity of >98% for non-target bands, significantly reducing stray light energy loss.

[0040] The cooling system employs an intelligent zone control strategy and a real-time temperature feedback mechanism. Two sets of axial fans are configured in the central area and around the perimeter of the hybrid LED array board (three sets cover the central 4×4 unit area, with even distribution in the edge areas). The specific layout is as follows: Central fan group: Covering a 30cm diameter circular area in the center of the array board, vertically mounted on the heat sink fins on the back of the substrate, responsible for core cooling. Edge fan groups: Two sets are installed on each of the four sides of the array board at a 45° angle, balancing heat dissipation and airflow guidance.

[0041] Specifically: Three Delta AFB0612VHD axial fans operate within a variable speed range of 3000–6000 rpm. The fan covering the central 4×4 unit area dynamically adjusts its speed (4000–6000 rpm) according to the heat load, while the edge areas maintain a base speed of 3000 rpm to control noise ≤45dB@1m. Each hybrid LED unit integrates a DS18B20 digital temperature sensor on its back, and real-time data is monitored via I... 2 The C-bus transmits data to the main control chip, and when the local temperature exceeds 70°C, it triggers power reduction protection to ensure long-term stable operation of the system in an environment ranging from -20°C to 50°C.

[0042] (4) Blue light insecticidal process

[0043] 1. Adult insect extermination stage (17:00-20:00)

[0044] Step 1: Spectral Activation

[0045] During the adult insect eradication phase (17:00-20:00), the system (the system controlling the LED array) drives the hybrid LED array through an FPGA time-division multiplexing control algorithm. Each hybrid LED unit is polled in 10ms time slices to ensure alternating activation of the 467nm and 550nm bands without spectral crosstalk; that is, only two 467nm LEDs are allowed to operate at full power (750μW / cm² per LED) within each time slice. 2 Total light intensity 1500μW / cm 2 Simultaneously, a 550nm LED is lit at a 30% duty cycle (single LED luminous intensity 40μW / cm²). 2 Total light intensity 120μW / cm 2 This design avoids wasted energy by precisely isolating the 404nm band during timing, while maintaining the synergistic effect of the sensitive bands for adult insects.

[0046] Step 2: Light Field Construction

[0047] A hemispherical microlens (3mm focal length) on the surface of a 467nm LED focuses light onto the blueberry skin, forming a high-intensity light spot with a diameter of 50cm; the aspherical lens of a 550nm LED generates a fan-shaped light field with a diffusion angle of ±30°, covering the flight path of the adult insects. Millimeter-wave radar monitors the insect population density in real time, and when the number of adult insects in a local area exceeds 5 per m², the detection method is used. 3 At that time, the duty cycle at 550nm is automatically increased to 50% (light intensity 200μW / cm²). 2 This enhances the avoidance effect. The spectral sensor (AS7265x) simultaneously detects the spectral purity at 467nm. If the purity falls below 85% due to coating aging, a self-test procedure is immediately triggered and the light field is calibrated.

[0048] The self-test program is designed to switch the FPGA to diagnostic mode and test the wavelength offset of each LED individually (with a tolerance of ±1nm). Offset LEDs automatically reduce their power to 50% and mark the fault location (displayed on the host computer). Then, the duty cycle of adjacent units is adjusted to compensate for the light intensity, maintaining overall uniformity (error <5%) to achieve light field calibration.

[0049] Step 3: Environmental Interaction

[0050] Three axial fans in the central area are accelerated to 5000 rpm, creating a centripetal airflow of 1.5 m / s to guide adult insects to gather in the core area of ​​the light spot; the edge fans maintain a base speed of 3000 rpm to avoid airflow turbulence interfering with the storage temperature control system. An infrared temperature sensor (MLX90614) monitors the temperature at the center of the light spot in real time. When a local temperature rise exceeding 12°C is detected, a 5-second ultra-strong pulse mode is triggered—instantly increasing the 467nm light intensity to 2500 μW / cm². 2 (The 550nm LED is turned off to eliminate interference), and the photosensitive cells of adult insects are destroyed by short-term high thermal light pressure. This synergistic mechanism increases the mortality rate of adult insects to 91% within 20 minutes after exposure to the light field, while reducing energy consumption by 37% compared to the continuous high light intensity mode.

[0051] The center of the light spot refers to the optical focal point of each hybrid LED unit, formed by focusing by microlenses (5cm from the LED surface). During the adult insect extermination stage, the central 4×4 unit light spots overlap to form a high-intensity core area (50cm in diameter).

[0052] 2. Larval extermination stage (22:00-04:00)

[0053] Step 1: Spectrum Switching

[0054] During the larval eradication phase (22:00-04:00), the system uses FPGA control logic to shut down all 550nm LEDs and activate a combined 467nm and 404nm spectrum. Within each hybrid LED unit, two 467nm LEDs operate at 80% duty cycle (single LED intensity 600μW / cm²). 2 Total light intensity 1200μW / cm 2 A single 404nm LED is lit at a 25% duty cycle (single LED luminous intensity 66.7μW / cm²). 2 Total light intensity 200μW / cm 2 The fuzzy PID algorithm dynamically adjusts the output ratio of each hybrid LED unit to ensure that the 404nm light intensity reaches 250μW / cm² from the surface to the bottom of the blueberry. 2 ~150μW / cm 2 The attenuation gradient is adapted to the distribution characteristics of larvae within the fruit.

[0055] Step 2: Pulse irradiation

[0056] The system operates with a pulse cycle of 5 seconds on / 10 seconds off (duty cycle 0.3). The 467nm microlens is adjusted to diffusion mode (focal length 5mm), increasing the light transmission depth from 8mm to 10mm, directly reaching the core activity area of ​​the larva. The wavelength isolation coating reflects 404nm diffused light, improving secondary utilization by 18%. The surface light intensity gradient is set to 467nm (1200μW / cm²). 2) and 404nm (250μW / cm 2 The coordinated distribution of the transmission depth was verified to be >95% by optical coherence tomography (OCT).

[0057] Step 3: Synergistic effect of thermal stimulation

[0058] Under low-temperature storage conditions (4℃), an axial fan maintained a base speed of 3000 rpm to avoid cold interference, while a PTC heating film was activated, raising the blueberry surface temperature to 15℃ within 2 hours. 404nm light excited the riboflavin in the fruit peel to produce reactive oxygen species (·OH concentration > 5 μmol / g), which, combined with the temperature rise effect, reduced the chitinase activity in the larvae's epidermis by 72%, leading to osmotic pressure imbalance and death. Verification by the Guizhou Provincial Botanical Garden showed that the larval mortality rate reached 95% within 12 hours, and the time for epidermal oxidative damage was shortened to 35% of that under normal conditions.

[0059] The PTC heating film is integrated into the edge of the hybrid LED array panel, spaced 10cm away from the blueberry pile to avoid direct contact. The heated surface temperature is ≤35℃, and the blueberry contact surface temperature is ≤15℃. Temperature control is achieved through linkage with an infrared temperature sensor. Furthermore, it is activated only during the larval stage, with a single heating cycle of ≤2 hours to prevent heat damage.

[0060] Following the above method, experiments were conducted on the two main fruit flies that currently harm blueberries: the spotted-winged fruit fly and the black-bellied fruit fly. The results showed that dynamic superposition irradiation of the three bands of 467nm, 404nm, and 550nm can significantly inhibit the hatching rate of fruit fly eggs, the survival rate of larvae, and the number of eggs laid by adults, as shown in Table 1 below.

[0061] Table 1. Effects of dynamic superposition of 467+404+550nm wavelengths on fruit flies.

[0062]

[0063] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A method for an insecticidal device based on hybrid LED arrays and dynamic spectral spatiotemporal coupling, characterized in that: Includes the following steps: (1) Adult killing stage The hybrid LED array is driven by an FPGA time-division multiplexing control algorithm, and each hybrid LED unit is polled and controlled in 10ms time slices to ensure that the 467nm and 550nm bands are alternately activated. (2) Larval extermination stage The FPGA control logic shuts down all 550nm LEDs and enables LEDs with wavelengths of 467nm and 404nm, ensuring that the 404nm light intensity in each hybrid LED unit reaches 250μW / cm² to 150μW / cm² from the blueberry surface to the bottom layer. 2 The decay gradient.

2. The method of the insecticidal device based on hybrid LED array and dynamic spectral spatiotemporal coupling according to claim 1, characterized in that: In step (1), only two LEDs with a wavelength of 467nm are allowed to operate at full power in each time slice, while one LED with a wavelength of 550nm is lit with a duty cycle of 30-50%.

3. The method of the insecticidal device based on hybrid LED array and dynamic spectral spatiotemporal coupling according to claim 1, characterized in that: In step (2), two LEDs with a wavelength of 467nm are lit with an 80% duty cycle in each of the hybrid LED units, and one LED with a wavelength of 404nm is lit with a 25% duty cycle.

4. The method of the insecticidal device based on hybrid LED array and dynamic spectral spatiotemporal coupling according to claim 1, characterized in that: The insecticidal device includes a hybrid LED unit, and multiple hybrid LED units are arranged in an array on a substrate to form a hybrid LED array plate. The hybrid LED unit includes three-wavelength LEDs with wavelengths of 467nm, 550nm and 404nm respectively.

5. The method of the insecticidal device based on hybrid LED array and dynamic spectral spatiotemporal coupling according to claim 4, characterized in that: The hybrid LED unit includes two LEDs with a wavelength of 467nm, one LED with a wavelength of 404nm, and one LED with a wavelength of 550nm. Each hybrid LED unit is arranged in a 2×2 matrix, and each LED is electrically interconnected.

6. The method of the insecticidal device based on hybrid LED array and dynamic spectral spatiotemporal coupling according to claim 4, characterized in that: A temperature sensor is located on the back of each of the hybrid LED units.

7. The method of the insecticidal device based on hybrid LED array and dynamic spectral spatiotemporal coupling according to claim 4, characterized in that: LEDs with a wavelength of 467nm are covered with hemispherical microlenses with a curvature radius of 1.5mm and a diameter of 1mm; LEDs with wavelengths of 404nm and 550nm are covered with asymmetric aspherical lenses to produce elliptical light spots with a major axis of 5mm and a minor axis of 3mm.

8. The method of the insecticidal device based on hybrid LED array and dynamic spectral spatiotemporal coupling according to claim 4, characterized in that: The LEDs on the hybrid LED array board are driven by an FPGA time-division multiplexing control algorithm, and each hybrid LED unit is controlled by polling in 10ms time slices, and the turn-on timing of the three wavelength LEDs in each hybrid LED unit is controlled.

9. The method of the insecticidal device based on hybrid LED array and dynamic spectral spatiotemporal coupling according to claim 4, characterized in that: The central area and the edges of the hybrid LED array board are covered with fans, and the fans rotate at a speed of 3000 to 6000 rpm.

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