Rotating mirror plant light supplement lamp

Abstract

The invention relates to the field of plant light supplement lamps, in particular to a rotating mirror plant light supplement lamp. The invention provides a rotating mirror plant light supplementing lamp. The rotating mirror plant light supplementing lamp comprises a light source, a driving motor and a multi-beam rotating mirror. The light sources are arranged near a plurality of focuses of the multi-beam rotating mirror, the driving motor is connected with the multi-beam rotating mirror, during working, the driving motor drives the multi-beam rotating mirror to rotate, and light emitted by the light sources is reflected and / or refracted by the multi-beam rotating mirror to form a plurality of rotating light beams for scanning illumination of an illuminated object. The irradiated object is a light guide device or a photoautotrophic organism. According to the device, a continuous light-emitting light source is converted into a scanning light source, pulse illumination light supplementing is conducted on plants, the light energy utilization rate of plant photosynthesis can be increased, and the light supplementing energy consumption cost is reduced.

Description

Technical Field

[0001] The invention relates to the field of agricultural plant supplementary lighting, and in particular to a rotating mirror plant supplementary lighting. Background Art

[0002] Agricultural lighting technology has been around since the 1960s. In winter and spring, rainy weather, and at night when there is insufficient light, artificial light supplementation for crops in greenhouses can effectively promote plant growth, increase yields, and improve economic benefits. Common plant lighting lamps in modern agriculture include agricultural high-pressure sodium lamps, metal halide lamps, and LED lighting lamps. Among them, agricultural high-pressure sodium lamps have the advantages of high luminous efficiency, high power of a single light source, and low equipment cost, and are suitable for lighting in open greenhouses. LED lighting lamps have the advantages of controllable spectrum and close-range lighting without burning plants. They are suitable as the main lighting source in vertical farms with compact planting space, or for inter-plant lighting of tall plants such as tomatoes in greenhouses.

[0003] The light intensity of agricultural supplementary lighting needs to exceed the photosynthesis compensation point of the plant so that the plant can accumulate organic matter and achieve the purpose of promoting growth. Within a certain range, the light intensity of artificial light supplementary lighting is proportional to the growth rate of the plant. However, in addition to the high cost of supplementary lighting equipment required in the early stage, the energy consumption cost in daily operation is also very high. Taking agricultural high-pressure sodium lamps as an example, the electricity cost of normal operation for one year is close to or even exceeds the equipment cost of the supplementary lighting in the early stage. Under the same supplementary lighting demand, the initial equipment cost investment of LED supplementary lighting is about 5 times higher than that of agricultural high-pressure sodium lamps, and the energy consumption level is not much different. Therefore, at this stage, agricultural supplementary lighting is still mainly based on agricultural high-pressure sodium lamps. Because agricultural supplementary lighting will significantly increase the cost of agricultural production, in actual production, supplementary lighting can only be carried out in greenhouses where higher-value crops are planted. The high cost limits the scope of application of agricultural supplementary lighting.

[0004] Photosynthesis consists of two mutually dependent reaction stages: light reaction and dark reaction. The light energy absorbed by the short-lived light reaction requires a long dark reaction to generate organic matter. The speed of the light reaction is at least one order of magnitude faster than the dark reaction. Therefore, under continuous light conditions, most of the light energy is not utilized by plants and is converted into fluorescence and heat. This is the main reason for the low efficiency of photosynthesis. If pulsed light is provided to plants, the light energy utilization rate of plants for photosynthesis under pulsed light conditions is higher than that under continuous light under the same total light energy input.

[0005] The plant supplementary lighting commonly used in existing greenhouses provides supplementary lighting in the form of continuous light, which has the problems of low light energy utilization, high light source power per unit area, and high energy consumption cost.

[0006] In order to achieve pulse light supplementary lighting, many scientific research teams have explored the use of LED pulse light as a plant supplementary light for many years, such as the technical solutions disclosed in patents such as CN110856316 and CN106538257. Although LED pulse light planting has achieved the goal of increasing the utilization rate of plant light energy and reducing energy consumption costs, there are problems such as more complex driving circuits and higher equipment costs, which offset the advantage of energy saving. In addition, under the premise of the same supplementary lighting area and plant growth effect, the rated power of the LED supplementary light for pulse light illumination and the LED for continuous lighting are the same, but the pulse light is emitted in a light and dark alternating manner with a lower average power. The rated power of the LED light source is proportional to the price, so the pulse light LED supplementary light cannot reduce the cost of the LED light source.

[0007] In addition to using the light source to directly emit pulsed light to illuminate the plants, pulsed light supplementary lighting can also be achieved by using a continuous light source to provide plants with pulsed light through mechanical motion scanning lighting.

[0008] The technical solution disclosed in patent CN 102318522 is that the light source is fixed on a trolley, and the trolley moves back and forth on the guide rail above the planting rack. As the trolley moves, the range of the fixed light source also moves, and scanning lighting is performed between different planting areas. The disadvantage is that only low-frequency pulse light illumination can be achieved, and the effect of improving light energy utilization is not obvious.

[0009] Japanese patent JPA 2016077264 discloses a solution for using laser scanning technology to supplement plant lighting. The disadvantage of this solution is that it is only applicable to point-shaped laser light sources and the cost of laser equipment is too high.

[0010] Patent CN 201911209799.4 filed by the applicant in 2019 discloses a plant supplementary light solution, in which the large-angle light emitted by the artificial light source is converged into a nearly parallel light beam through a spotlight cover, and the nearly parallel light beam is reflected by a moving multi-faceted mirror / galvanometer mirror and transformed into a scanning light beam to scan and illuminate the plants, so that the plants receive pulsed light illumination. The defect of this solution is that the large-angle light emitted by the artificial light source cannot be simultaneously converted into multiple scanning light beams. Summary of the invention

[0011] Based on the above-mentioned defects of the prior art, the present invention intends to provide a new type of plant fill light lamp, which can convert the wide-angle light emitted by a continuously luminous artificial light source into multiple scanning light beams, so that plants can obtain pulsed light illumination, improve the utilization rate of light energy for photosynthesis, and save fill light energy consumption.

[0012] In order to solve the above technical problems, the present invention provides a rotating mirror plant fill light, comprising: a light source, a driving motor and a multi-beam rotating mirror; the light source is arranged near multiple focal points of the multi-beam rotating mirror, and the driving motor is connected to the multi-beam rotating mirror; when working, the driving motor drives the multi-beam rotating mirror to rotate, and the light emitted by the light source is reflected and / or refracted by the multi-beam rotating mirror to form multiple rotating light beams to perform scanning illumination on the object to be illuminated, and the object to be illuminated is a light guiding device or a photosynthetic autotrophic organism.

[0013] The present invention realizes the conversion of large-angle light emitted by a continuously luminous artificial light source into multiple scanning light beams to perform scanning illumination on an illuminated object, so that the illuminated object obtains pulse light illumination.

[0014] Compared with the comparative scheme of application number CN201911209799.4, the functional differences of the present invention are: 1. forming multiple scanning beams at the same time, 2. no device is required to convert into a near-parallel beam before forming the scanning beam, 3. a larger scanning lighting angle can be achieved, 4. during operation, the angle of the moving optical surface relative to the light source remains unchanged.

[0015] Compared with the technical solution of patent CN 102318522, the present invention can easily achieve a scanning frequency of more than 100 Hz. The moving parts are the drive motor and the multi-beam rotating mirror. Compared with the solution in which the entire trolley is the moving part, the energy consumption is lower.

[0016] Compared with the technical solution of Japanese patent JPA 2016077264, the present invention is suitable for common agricultural supplementary lighting sources such as agricultural high-pressure sodium lamps and LED lamps. The light source cost is lower and the spectrum is more suitable for plant growth requirements.

[0017] After searching, there are no other technical solutions similar to the present invention in the field of agricultural supplementary lighting. In the field of navigation technology, the optical principle of lighthouses and mechanical flashing siren lights are similar to the optical structure of the present invention, but they are in different technical fields, solve different technical problems, and have different objects to be illuminated, so they are not considered as conflicting technical solutions.

[0018] The light source may be a gas discharge light source, an incandescent lamp or an LED, etc. Depending on the type of the light source, the light source is powered by a ballast, an electronic ballast, a constant current drive circuit or a pulse drive circuit.

[0019] The driving motor can be an AC motor, a DC motor, a brushed motor, a brushless motor, a hollow motor, an outer rotor motor, etc. The rotor of the driving motor can be directly connected to the edge or rotating shaft of the multi-beam rotating mirror, or it can be indirectly connected. The rotor of the motor is connected to the multi-beam rotating mirror through a transmission device or a speed change device such as a coupling, a magnetic coupling or a gear belt.

[0020] The multi-beam rotating mirror can transform the light from the light source into multiple beams. The multi-beam rotating mirror is composed of multiple focusing devices arranged around the rotation axis with the focus facing the light source. The light emitted by the light source passes through the multi-beam rotating mirror and is respectively gathered into multiple beams by the multiple focusing devices, which irradiate outward along their respective optical axes. When the multi-beam rotating mirror rotates, multiple beams rotate simultaneously to achieve scanning illumination of the object being illuminated.

[0021] The light guide device refers to an optical device that transmits light to the photosynthetic autotrophic organisms for illumination by reflection, refraction, scattering, total reflection, etc. The light guide device can be a light guide plate, with the light inlet facing the multi-beam rotating mirror and the light outlet surface close to the photosynthetic autotrophic organisms. It can also be a light guide, a combined reflector, and other devices. Photosynthetic autotrophic organisms include microalgae, photosynthetic bacteria, protozoa with photosynthetic pigments, plants, etc.

[0022] Preferably, the light source is a type of light source that is more suitable for agricultural supplementary lighting, such as agricultural high-pressure sodium lamps, metal halide lamps or LED light sources.

[0023] These types of light sources have achieved good agricultural lighting effects through long-term practice. The multi-beam rotating mirror of the present invention can convert this type of large-angle emitting light source into multiple scanning light beams.

[0024] Preferably, the arrangement of the multiple condenser lenses can be located on the same side of the light source, with multiple focal points facing the light source or around the light source, or pointing to the direction of the virtual image of the light source, and the multiple condenser lenses are arranged in a disc, ring, or bowl shape around the rotation axis, and the multiple condenser lenses are arranged in one or more circles along the radial direction of the rotation axis. The arrangement of the condenser lenses can also be around the light source, with multiple focal points facing the rotation axis where the light source is located, and the multiple condenser lenses are arranged in a tube or barrel shape around the rotation axis, and the multiple condenser lenses are arranged in one or more circles along the axial direction of the rotation axis.

[0025] The focusing device can be a focusing lens, a focusing surface mirror, or a hybrid focusing device, and the focusing device realizes focusing by refraction and / or reflection. The focusing lens includes a convex lens, a convex cylindrical lens, a Fresnel lens, and a microlens array. Among them, the convex lens includes a convex aspheric mirror, a convex free-form surface lens, and the Fresnel lens is equivalent to a convex lens and a convex cylindrical lens. The focusing surface mirror includes a spherical mirror and an aspheric mirror, and the aspheric mirror includes a parabolic mirror, a free-form surface reflector, and the hybrid focusing device is composed of a focusing lens and a focusing surface mirror. The multi-beam rotating mirror composed of a focusing lens can also function as a lampshade to protect the light source.

[0026] The material of the focusing lens can be K9 glass, ultra-white glass, quartz glass, acrylic and other light-transmitting materials. The processing method of the multi-beam rotating mirror composed of the focusing lens can be integral mold forming, hot bending welding, or injection molding. The inner and outer walls of the focusing lens have anti-reflection films to increase the transmittance, and the inner wall can also have an infrared reflection film to reflect the infrared rays of the gas discharge light source back to the light source to further increase the luminous efficiency.

[0027] Preferably, the multi-beam rotating mirror is formed by combining a plurality of convex lenses and / or convex cylindrical lenses into a disc shape, a tube shape or a barrel shape, and the plurality of convex lenses and / or convex cylindrical lenses are arranged in one or more circles around the rotation axis.

[0028] Preferably, the multi-beam rotating mirror is composed of an array Fresnel lens equivalent to a plurality of convex lenses and / or convex cylindrical lenses, the array Fresnel lens has a disc-shaped, tubular or barrel-shaped shape, and the array Fresnel lens is arranged in one or more circles around the rotation axis.

[0029] The multi-beam rotating mirror designed with array Fresnel lenses can greatly reduce the materials required to make the multi-beam rotating mirror, reduce the weight and driving motor power, and also reduce the size of the multi-beam rotating mirror.

[0030] Preferably, the sawtooth convex surface of the array Fresnel lens faces the light source.

[0031] The sawtooth convex surface of the exposed array Fresnel lens is relatively fragile, easily contaminated with dust, and difficult to clean. The sawtooth convex surface is placed on the inside facing the light source, and the smooth surface is placed on the outside. In this way, the inside is closed to the outside environment and is not easy to touch, while the outside is smooth, dust is not easily deposited, and it is easy to clean. In addition, the sawtooth convex surface is facing the direction of the light source, so the internal reflection loss of the light in the medium is low, and there is less stray light.

[0032] Preferably, the sawtooth convex surface of the array Fresnel lens faces away from the light source and outwards.

[0033] Preferably, the multi-beam rotating mirror is formed by combining a plurality of focusing mirrors to form a pyramidal shape, a turbofan shape or a wind wheel shape, and the plurality of focusing mirrors are arranged in one or more circles around the rotation axis.

[0034] With the focusing mirror solution, the light emitted by the light source only needs to be reflected once at least to obtain multiple scanning beams. With the existing material level, the reflection loss is significantly lower than the transmission loss of the focusing lens, so the light energy loss is lower.

[0035] Preferably, the focusing mirror is a parabolic mirror, and the light emitted by the light source is reflected by a plurality of rotating parabolic mirrors to form a plurality of rotating light beams to perform scanning illumination on the object to be illuminated.

[0036] The material of the focusing mirror can be a one-piece aluminum-containing material polished on the reflective surface to form a focusing mirror. It can also be composed of a reflector base of metal or composite material plus a reflective surface. The reflective surface can be a mirror surface polished with aluminum or silver-containing materials, or a high reflectivity material such as a dielectric film can be attached to the reflector base.

[0037] Preferably, a reflective curved surface and / or lens with a fixed position relative to the light source should also be provided in the front light path and / or rear light path of the multi-beam rotating mirror, and its function is to change the light intensity distribution of the front light path and / or rear light path of the multi-beam rotating mirror.

[0038] The reflective curved surface and / or lens in the optical path in front of the multi-beam rotating mirror converges the light emitted by the light source at angles beyond the range of the multi-beam rotating mirror into the range of the multi-beam rotating mirror by reflection and / or refraction, thereby reducing the light wasted at angles and ranges that do not require illumination. The light intensity distribution of the light source at different illumination angles within the range of the multi-beam rotating mirror can also be controlled to achieve more uniform illumination of the illumination plane where the illuminated object is located. The reflective curved surface and / or lens in the optical path behind the multi-beam rotating mirror can correct the illumination angles of the multiple scanning light beams generated by the multi-beam rotating mirror, change the light intensity distribution at different illumination angles, change the scanning illumination range, and form multiple illumination areas. The lens in the optical path behind the multi-beam rotating mirror also has the function of a lampshade.

[0039] The reflective curved surface may be a reflective lampshade, a reflective cup, a total reflective curved surface in a lens, etc. The lens may be an LED focusing lens, a collimating lens, an array microlens, a Fresnel lens, etc.

[0040] For gas discharge light sources that emit light at multiple angles, such as agricultural high-pressure sodium lamps, the reflective surface can be set on the side of the light source facing away from the illuminated object to reflect the light from the light source to the same side to narrow the light angle of the light source. It can also be set at both ends of the long axis direction of the light source to reflect the light irradiated by the light source in the long axis direction and emit it radially from the light source. The shape of the reflective surface can be a semi-circular tube, a dish, a bowl or other reflector shapes in the prior art. It can also be a parabolic reflector, a reflective cup or a combination of a reflective cup and a focusing lens with the light source placed at the focus to converge the light from the light source to one side. For light sources such as LEDs, whose light emission angles are generally within 180 degrees, the reflective surface and / or lens can be set in front of the light source to narrow the light emission angle of the LED light source and change the light intensity distribution. The lens can contain a total reflection surface or an array of microlenses.

[0041] Preferably, the multi-beam rotating mirror has a connecting end located at the edge or the rotating axis, the rotor of the driving motor is connected to the connecting end of the multi-beam rotating mirror and drives the multi-beam rotating mirror to rotate, and the stator of the driving motor is installed on a lamp holder or a bracket.

[0042] The connection end is a structure or device arranged at the edge, periphery or rotating axis of the multi-beam rotating mirror to facilitate connection with the motor. The bracket is used to fix multiple relatively stationary components or as a mounting bracket.

[0043] Preferably, the multi-beam rotating mirror has a connecting end located at the edge or the rotating axis, the driving motor is a hollow motor, the rotor of the hollow motor is connected to the connecting end of the multi-beam rotating mirror and drives the multi-beam rotating mirror to rotate, and the middle through hole of the hollow motor serves as a light through hole or a light source wiring hole.

[0044] The middle through hole serving as the light source wiring hole can be sealed after assembly is completed to achieve dust and moisture-proof effects on the light source and the inner side of the multi-beam rotating mirror.

[0045] Preferably, the multi-beam rotating mirror and the light source are both in the same light-transmitting cover. The light-transmitting cover prevents the light source and the multi-beam rotating mirror from being exposed, plays a protective and dust-proof role, and is easier to clean.

[0046] The light-transmitting cover is at least partially made of transparent material to allow the scanning beam to be emitted for external illumination, and the area where the scanning beam is not emitted may be made of non-transparent material. The transparent material of the light-transmitting cover may be glass, ultra-clear glass, quartz, optical glass, acrylic, etc.

[0047] Preferably, the multi-beam rotating mirror and the light source are both in the same sealed light-transmitting cover, and the air pressure in the sealed light-transmitting cover is lower than the atmospheric pressure or is filled with a gas with an average molecular weight lower than 28.

[0048] The sealed light-transmitting cover is evacuated to create a low pressure or vacuum environment, or filled with a gas with a molecular weight lower than that of air, which can reduce the air resistance when the multi-beam rotating mirror is working. The sealed light-transmitting cover can also be provided with a gas valve to achieve vacuuming or inflation operation.

[0049] Preferably, before the light source starts to emit light stably, the drive motor is started in advance to drive the multi-beam rotating mirror to rotate.

[0050] Preferably, after the light source is turned off, the drive motor continues to work for a period of time and then stops.

[0051] Preferably, the number of focusing devices constituting the multi-beam rotating mirror is greater than 3.

[0052] Preferably, in a cross section perpendicular to the rotation axis, the number of focusing devices constituting the multi-beam rotating mirror is less than 30.

[0053] Preferably, in a cross section perpendicular to the rotation axis, the number of focusing devices constituting the multi-beam rotating mirror is less than 16.

[0054] Preferably, the rotation speed of the multi-beam rotating mirror is greater than 1000 revolutions per minute.

[0055] Preferably, the rotation speed of the multi-beam rotating mirror is greater than 1800 revolutions per minute.

[0056] The area illuminated by the beams emitted by the multi-beam rotating mirror is the light zone, and the area between the multiple beams is dark zone with no light or weak light. There are multiple light zones and dark zones. When the multi-beam rotating mirror rotates, the beams follow the rotation, and the light zone and the dark zone alternate. Both the light zone and the dark zone are within the scanning illumination range. The number of times that the illuminated object at the same point is in the light zone and receives scanning illumination per second is the pulse light frequency. The ratio of the time that the illuminated object at the same point is in the light zone to the unit time in unit time is the duty cycle.

[0057] Preferably, within the scanning irradiation range of the multi-beam rotating mirror, the pulse frequency of the scanning illumination obtained by the illuminated object at the same point is greater than 100 Hz.

[0058] Preferably, within the scanning irradiation range of the multi-beam rotating mirror, the pulse frequency of the scanning illumination obtained by the illuminated object at the same point is greater than 300 Hz.

[0059] Preferably, within the scanning irradiation range of the multi-beam rotating mirror, the duty cycle of the scanning illumination obtained by the illuminated object at the same point is less than 25%.

[0060] Similar optical application solutions in other fields, such as lighthouses and siren lights, emit pulsed light at a lower frequency to facilitate human eye recognition. The purpose of the rotating mirror plant supplementary light of the present invention is to increase the utilization rate of light energy for photosynthesis, and the pulse frequency required to be achieved is greater than 100Hz, which exceeds the 24Hz range of the human eye's perception of stroboscopic light.

[0061] According to different application requirements, there may also be supporting devices and technical means commonly used in the technical field, such as lamp holders, wiring devices, heat dissipation devices and switches. BRIEF DESCRIPTION OF THE DRAWINGS

[0062] Figure 1 This is a schematic diagram of a plant fill light that is an agricultural high-pressure sodium lamp and a barrel-shaped lens with a multi-beam rotating mirror.

[0063] Figure 2 This is a schematic diagram of a plant light that uses a parabolic reflector cup with a disk-shaped lens and a multi-beam rotating mirror.

[0064] Figure 3 This is a schematic diagram of a plant light that uses an LED light source with a tubular array Fresnel lens and a multi-beam rotating mirror.

[0065] Figure 4 It is a cross-sectional schematic diagram of a plant light that uses an LED light source with a tubular array Fresnel lens and a multi-beam rotating mirror.

[0066] Figure 5 The cross-sectional diagram of a plant light that is an agricultural high-pressure sodium lamp and a wind wheel-shaped parabolic mirror with a multi-beam rotating mirror. Implementation Example

[0067] A plant light supplementary lamp with an agricultural high-pressure sodium lamp and a barrel-shaped lens multi-beam rotating mirror. The lamp comprises a ballast, a lamp holder 11, an agricultural high-pressure sodium lamp light source 10, a motor 20, a barrel-shaped lens multi-beam rotating mirror 32, and a bracket 23. Figure 1 As shown, the agricultural high-pressure sodium lamp light source 10 is fixed on the lamp holder 11, powered by the ballast to emit light, the barrel-shaped lens multi-beam rotating mirror 32 is composed of 8 convex lenses arranged symmetrically around the center of the rotation axis, the focal length of the convex lens is slightly smaller than the radius of the cross section of the barrel-shaped lens multi-beam rotating mirror 32, the luminous ceramic tube of the agricultural high-pressure sodium lamp light source 10 is located near the 8 focal points of the barrel-shaped lens multi-beam rotating mirror 32, and the motor 20 is connected to the connection end of the barrel-shaped lens multi-beam rotating mirror 32 away from the bottom center of one end of the lamp holder, and is driven to rotate by the motor 20. When working, the power supply is connected, and the power supply includes a ballast for powering the agricultural high-pressure sodium lamp 10 and a driving circuit for powering the motor 20. The light emitted by the agricultural high-pressure sodium lamp 10, after being refracted by the barrel-shaped lens multi-beam rotating mirror 32, forms 8 separated light beams to illuminate the outside, and the light beams form rotating light beams as the barrel-shaped lens multi-beam rotating mirror 32 rotates, and the external illuminated object is scanned and illuminated, and the illuminated object obtains pulse light illumination with alternating light and dark.

[0068] A variation is that a reflective curved surface can be provided at both ends of the axial direction of the agricultural high-pressure sodium lamp light source 10. The reflective curved surface is a ring-shaped curved reflector, which reflects the light beams emitted by the agricultural high-pressure sodium lamp light source 10 to both ends of the axial direction that are not directly irradiated to the optical curved surface of the barrel-shaped lens multi-beam rotating mirror 32 onto the optical curved surface of the barrel-shaped lens multi-beam rotating mirror 32.

[0069] There is also a variant, in which the connection end of the barrel-shaped lens multi-beam rotating mirror 32 is close to the lamp holder 11, the driving motor is an annular hollow motor, the stator of the annular hollow motor is fixedly connected to the lamp holder, the rotor is connected to the connection end of the barrel-shaped lens multi-beam rotating mirror 32, and the end of the barrel-shaped lens multi-beam rotating mirror 32 away from the lamp holder is a blind end and is closed. Under this design, the bracket 23 can be eliminated. Example

[0070] A plant light supplementary lamp with a parabolic reflector cup and a disk-shaped lens multi-beam rotating mirror. It includes a lamp holder 11, a metal halide light source 10, a parabolic reflector cup 13, a hemispherical reflector cup 12, a ring-shaped hollow motor, and a disk-shaped lens multi-beam rotating mirror 30. Figure 2As shown, the metal halide lamp light source 10 is installed on the lamp holder 11, and the reflective curved surfaces are the parabolic reflector cup 13 and the hemispherical reflector cup 12. The metal halide lamp light source 10 is arranged at the focus of the parabolic reflector cup 13 and the hemispherical reflector cup 12, and the hemispherical reflector cup 12 is arranged in the direction of the metal halide lamp light source 10 facing away from the lamp holder 11. The parabolic reflector cup 13 and the hemispherical reflector cup 12 are reflective curved surfaces of the light path in front of the multi-beam rotating mirror. A disk-shaped lens multi-beam rotating mirror 30 is arranged at the opening of the parabolic reflector cup 13. The disk-shaped lens multi-beam rotating mirror 30 is formed by 12 convex cylindrical lenses intersecting and splicing with the optical axis radially intersecting. The outer periphery of the disk-shaped lens multi-beam rotating mirror 30 is a connecting end, which is connected to the rotor 22 of the annular hollow motor, and the stator 21 of the annular hollow motor is fixedly installed on the outer edge of the parabolic reflector cup 13. When working, the power supply is connected, and the power supply supplies power to the annular hollow motor and the metal halide lamp light source 10. The disk-shaped lens multi-beam rotating mirror 30 rotates under the drive of the annular hollow motor. The light emitted by the metal halide lamp light source 10 to multiple angles under the drive of the ballast is transformed into a parallel light beam or a small-angle light beam after being reflected by the parabolic reflector cup 13, or after being reflected by the hemispherical reflector cup 12 and the parabolic reflector cup 13, and then emitted from the opening of the parabolic reflector cup. The light beam is refracted by the rotating disk-shaped lens multi-beam rotating mirror 30 to form a rotating radial light spot, and the illuminated object is scanned and illuminated. The small-angle light beam refers to a light beam with a light-emitting angle less than 180 degrees. The disk-shaped lens multi-beam rotating mirror 30 can be replaced by a turbofan-shaped multi-beam rotating mirror composed of multiple parabolic mirrors. The light beam emitted from the opening of the parabolic reflector cup is reflected by the turbofan-shaped multi-beam rotating mirror to form a rotating radial light spot. The parabolic reflector cup 13 and the hemispherical reflector cup 12 can also be replaced by an equivalent collimating lens.

[0071] A variation, if the light source is a large-area LED light source that emits light evenly at a large angle, then a reflective cup may not be needed or only a shallower reflective cup or lens is needed. The lens multi-beam rotating mirror is a bowl-shaped mirror with a protruding center. The edge of the bowl is connected to the rotor 22 of the annular hollow motor, and the stator 21 of the annular hollow motor is fixed on the plane where the LED substrate is located.

[0072] There is another variation, the connection end of the disk-shaped lens multi-beam rotating mirror 30 is located inside or outside the rotating shaft, the rotor of the driving motor is coaxially connected to the connection end, the stator of the driving motor is fixed to the parabolic reflective cup 13 of the lamp body through a bracket or a truss, and the rotor at the center of the driving motor is fixed to the rotating shaft of the disk-shaped lens multi-beam rotating mirror 30. The driving motor can also be set on a non-coaxial axis with the disk-shaped lens multi-beam rotating mirror 30, and the driving motor rotor drives the disk-shaped lens multi-beam rotating mirror 30 to rotate in the form of a gear set or a transmission belt. Example

[0073] A plant light supplementary lamp with an LED light source and a tubular array Fresnel lens multi-beam rotating mirror. Figure 3 , Figure 4 As shown, it includes a driving circuit, a bracket 23, a hollow motor, a tubular array Fresnel lens multi-beam rotating mirror 31, a bearing 24, a light source substrate 14, a heat sink 15, an LED light source 16, and a collimating lens 17. The circuit connecting the LED light source 16 and the hollow motor is arranged in the inner cavity of the bracket 23, one end of the bracket 23 is connected to the stator 21 of the hollow motor, and the other end is connected to the outer ring of the bearing 24. The nozzles at both ends of the tubular array Fresnel lens multi-beam rotating mirror 31 each have a connecting end, and the two connecting ends are respectively connected to the rotor 22 of the hollow motor and the inner ring of the bearing 24. A plurality of LED light sources 16 are arranged on the long strip light source substrate 14, arranged in a row, and a collimating lens 17 is arranged in front of each LED light source. The long strip light source substrate 14 extends into the cavity of the tubular array Fresnel lens multi-beam rotating mirror 31. A heat sink 15 is arranged on the back of the long strip light source substrate 14, and the heat sink 15 is a heat sink fin. Each grid on the outer surface of the tubular array Fresnel lens multi-beam rotating mirror 31 represents a Fresnel lens equivalent to a convex cylindrical mirror or a convex lens. When working, driven by the driving circuit, the hollow motor drives the tubular array Fresnel lens multi-beam rotating mirror 31 to rotate, and the light emitted by each LED light source 16 is refracted and reflected by the collimating lens 17 to form a small-angle light beam 00, which is irradiated on the partial array Fresnel lens of the tubular array Fresnel lens multi-beam rotating mirror 31 facing the side of the object to be illuminated, and refracted to form multiple scanning light beams 01 to scan and illuminate the light receiving surface 04 where the object is located. The area being illuminated by the scanning light beam 01 is the light area 02, and the area not illuminated is the dark area 03. As the scanning light beam 01 moves, the light area 02 and the dark area 03 change alternately, and the object to be illuminated at the same position obtains alternating light and dark pulse light illumination.

[0074] In a variant, the heat dissipation device is a combination of a heat pipe and a radiator. The long strip heat pipe is close to the long strip light source substrate 14, and the extended end of the heat pipe extends from the central axis cavity 25 of the hollow motor to connect to an external radiator, which can be an air-cooled radiator or a liquid-cooled radiator. The central axis cavity 25 of the hollow motor can be filled with material to be sealed, and the end of the tubular array Fresnel lens multi-beam rotating mirror 31 connected to the bearing is also sealed, so as to prevent dust from entering the interior.

[0075] There is also a variation, in which a tubular light-transmitting protective cover is provided, which is made of a fully transparent material and is fixed to the bracket 23, completely wrapping the tubular array Fresnel lens multi-beam rotating mirror 31 and maintaining a certain distance to protect the outer surface of the rotating tubular array Fresnel lens multi-beam rotating mirror 31. Example

[0076] The utility model relates to a plant supplementary lighting lamp which is composed of an agricultural high-pressure sodium lamp and a wind wheel-shaped parabolic mirror and a multi-beam rotating mirror. Figure 5It is a cross-sectional schematic diagram perpendicular to the rotation axis. Arranged from the inside to the outside are the light source 10, the wind wheel-shaped parabolic mirror multi-beam rotating mirror 34, and the fixed Fresnel lens 40. The light source 10 is the light-emitting core of the agricultural high-pressure sodium lamp, and the outer circle of the light source 10 represents the glass bulb of the agricultural sodium lamp. The wind wheel-shaped parabolic mirror multi-beam rotating mirror 34 is composed of 10 parabolic reflectors, and the 10 parabolic reflectors are fixed at the same connection end and connected to the drive motor. The parabolic reflector is composed of a substrate facing away from the light source and a parabolic mirror reflecting surface 341 obliquely facing the light source but with the focus at the light source. The function of the substrate is to support the parabolic mirror reflecting surface 341. The fixed Fresnel lens 40 belongs to the lens of the optical path behind the multi-beam rotating mirror, which is divided into two symmetrical half circles, each half circle is equivalent to a convex lens, and its function is to divide the scanning light beam emitted by the wind wheel-shaped parabolic mirror multi-beam rotating mirror 34 outward 360° into two upper and lower lighting areas, narrow the range of scanning lighting, change the light intensity distribution, and perform scanning lighting on the plants on the light receiving surface 04 of the lighting area on both sides. When working, the power supply is connected to the light source 10 and the driving motor. The light source 10 obtains power to emit light at a large angle of 360°, and the driving motor drives the wind wheel-shaped parabolic mirror multi-beam rotating mirror 34 to rotate. The light emitted by the light source 10 is reflected by the 10 parabolic mirror reflective surfaces 341 of the wind wheel-shaped parabolic mirror multi-beam rotating mirror 34 to form 10 scanning light beams 01. The scanning light beam 01 is refracted by the fixed Fresnel lens 40 to form a corrected scanning light beam 011. The corrected scanning light beam 011 performs scanning lighting on the plants on the light receiving surface 04.

[0077] The scanning direction of the modified scanning beam 011 is the same as the rotation direction of the wind wheel-shaped parabolic mirror multi-beam rotating mirror 34. The area being illuminated by the modified scanning beam 011 is the light area 02, and the area not illuminated is the dark area 03. The light area 02 and the dark area 03 are in the same scanning illumination range and are alternately changed, so that each plant is illuminated by pulsed light. When the rotation speed of the wind wheel-shaped parabolic mirror multi-beam rotating mirror 34 is 1800 revolutions per minute, the frequency of the pulsed light generated by the scanning illumination is 300 Hz, and when the average width ratio of the light area 02 and the dark area 03 in the scanning direction is 1:4, the duty cycle of the pulsed light is 20%.

[0078] In one variant, the wind wheel parabolic mirror multi-beam rotating mirror 34 can be replaced by an array Fresnel lens multi-beam rotating mirror. In another variant, if the internal space of the fixed Fresnel lens 40 is sealed and filled with nitrogen or evacuated, the glass bulb of the agricultural sodium lamp light source 10 can be eliminated, further reducing light energy loss.

[0079] As another variation, the fixed Fresnel lens 40 can also be designed to be equivalent to a plurality of convex lenses, so as to divide the scanning illumination range into a plurality of illumination areas.

[0080] The implementation modes of the present invention are not limited to the above-mentioned specific embodiments. Those skilled in the art can design a variety of variants within the scope of the technical solution protected by the present invention, or use similar technical means to achieve the same technical effect of the present invention.

Claims

1. A rotating mirror plant fill light, characterized in that: include: Light source, drive motor and multi-beam rotating mirror; The light source is arranged near a plurality of focal points of the multi-beam rotating mirror, and the driving motor is connected to the multi-beam rotating mirror; During operation, the driving motor drives the multi-beam rotating mirror to rotate, and the light emitted by the light source is reflected and / or refracted by the multi-beam rotating mirror to form multiple rotating light beams to perform scanning illumination on the object to be illuminated, which is a light guide device or a photosynthetic autotrophic organism.

2. According to claim 1, a rotating mirror plant supplementary light, characterized in that: The multi-beam rotating mirror is formed by combining a plurality of convex lenses and / or convex cylindrical lenses to form a disk shape, a tube shape or a barrel shape, and the plurality of convex lenses and / or convex cylindrical lenses are arranged in one or more circles around the rotation axis.

3. According to claim 1, a rotating mirror plant supplementary light, characterized in that: The multi-beam rotating mirror is formed by combining a plurality of focusing mirrors to form a pyramidal shape, a turbofan shape or a wind wheel shape, and the plurality of focusing mirrors are arranged in one or more circles around the rotation axis.

4. The rotating mirror plant supplementary light according to claim 3, characterized in that: The focusing mirror is a parabolic mirror, and the light emitted by the light source is reflected by a plurality of rotating parabolic mirrors to form a plurality of rotating light beams to perform scanning illumination on the illuminated object.

5. The rotating mirror plant supplementary light according to claim 1, characterized in that: The multi-beam rotating mirror is composed of array Fresnel lenses equivalent to multiple convex lenses and / or convex cylindrical lenses. The array Fresnel lenses are in a dish, tube or barrel shape and are arranged in one or more circles around the rotation axis.

6. A rotating mirror plant supplementary light according to any one of claims 1 to 5, characterized in that: The multi-beam rotating mirror has a connecting end located at the edge or the rotating axis, the rotor of the driving motor is connected to the connecting end of the multi-beam rotating mirror and drives the multi-beam rotating mirror to rotate, and the stator of the driving motor is installed on a lamp holder or a bracket.

7. A rotating mirror plant supplementary light according to any one of claims 1 to 5, characterized in that: The multi-beam rotating mirror has a connecting end located at the edge or the rotating axis, and the driving motor is a hollow motor. The rotor of the hollow motor is connected to the connecting end of the multi-beam rotating mirror and drives the multi-beam rotating mirror to rotate, and the middle through hole of the hollow motor serves as a light through hole or a light source wiring hole.

8. A rotating mirror plant supplementary light according to any one of claims 1 to 5, characterized in that: A reflective curved surface and / or lens fixed relative to the light source should also be provided in the front light path and / or rear light path of the multi-beam rotating mirror, and its function is to change the light intensity distribution of the front light path and / or rear light path of the multi-beam rotating mirror.

9. The rotating mirror plant supplementary light according to claim 6, characterized in that: A reflective curved surface and / or lens fixed relative to the light source should also be provided in the front light path and / or rear light path of the multi-beam rotating mirror, and its function is to change the light intensity distribution of the front light path and / or rear light path of the multi-beam rotating mirror.

10. A rotating mirror plant supplementary light according to any one of claims 1 to 5, characterized in that: The multi-beam rotating mirror and the light source are both in the same sealed light-transmitting cover, and the air pressure in the sealed light-transmitting cover is lower than the atmospheric pressure or is filled with a gas with an average molecular weight lower than 28.

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