30results about How to "Have the effect of repelling birds" patented technology

An intelligent laser bird-repelling system for substations mainly comprises at least one rotary head, a laser emitter and a comprehensive controller with an intelligent video detection unit. The intelligent video detection unit mainly comprises an industrial high-definition intelligent camera and an automatic collection and detection module capable of automatically collecting activities of birds in a substrate region. The industrial high-definition intelligent camera and the laser emitter are installed on one or respective ones of the rotary heads. The industrial high-definition intelligent camera is connected with a comprehensive console through the automatic collection and detection module connected to the rear of the industrial high-definition intelligent camera. The laser emitter is connected with the comprehensive console through a connecting line. The intelligent video detection unit is simple in structure, convenient and reliable to use, capable of combining video monitoring and laser emission to effectively repel birds and the like.

The invention relates to an acoustooptical bird dispelling device. The acoustooptical bird dispelling device comprises a windmill and a box body, wherein the windmill is provided with a light-emitting lens and is arranged on a windmill shaft; a first reduction gear is arranged on the upper part of the windmill shaft positioned in the box body; the lower part of the windmill shaft is connected with a bearing; the first reduction gear is meshed with a second reduction gear; a convex shaft is arranged below the second reduction gear; a shifting fork is arranged on one side of the convex shaft; a sounding barrel is arranged nearby the shifting fork; a charge control module and a lithium battery are also arranged in the box body; the charge control module is connected with the lithium battery; a solar panel is arranged on one side above the box body and is connected with the charge control module; a light perception flash apparatus is arranged on the other side above the box body and is connected with the lithium battery. Wind power is used for reflecting light and sound, solar energy is used to charge, and red and white flash is performed at night, so that a bird is not hurt but can be dispelled, bird damage is effectively avoided, and power supply reliability is improved.

The invention provides a forest fire prevention wireless alarm device and relates to the technical field of forest fire prevention. The forest fire prevention wireless alarm device comprises a rod body, the periphery of the rod body is fixedly connected with a solar energy generating device, a bird repelling device is fixedly mounted at the left end of the rod body, the top of the rod body is rotatably connected with a rotary table, the top of the rotary table is rotatably connected with a camera, a first bevel gear is fixedly mounted at the bottom of the rotary table, a second bevel gear is meshed at the periphery of the first bevel gear, and the right end of the second bevel gear is fixedly connected with a motor. The forest fire prevention wireless alarm device provided by the inventioncan repel birds, avoids the birds from nesting on the wireless alarm device and influencing normal operation of the wireless alarm device and can clean the outside of a glass cover in a process thatthe camera rotates, so that image acquisition definition of the camera is improved, and sensitivity of the wireless alarm device is improved.

The invention discloses an electric bird repelling device capable of self-generating electricity and with electromagnetic-controlled extending and retraction, and belongs to the technical field of electric power. The electric bird repelling device includes a housing, a magnetic block I is fixedly connected in the middle of the housing, and two magnetic plates symmetrical to each other are fixedlyconnected to the positions, close to the top of the magnetic block I, of the inner wall of the housing; the top of the housing is rotatably connected to a rotating block, a coil is movably connected to the position, close to the middle parts of the two magnetic plates, of the bottom of the rotating block, a rotating groove is formed in the outer side of the rotating block, and the inner wall of the right side of the housing is movably connected with a slider; and the left side of the slider is fixedly connected with a limiting block adapted to the rotating groove. According to the electric bird repelling device capable of self-generating electricity and with electromagnetic-controlled extending and retraction, through the cooperative use of the coil and the magnetic plates, when wind blows, a reflector rotates under the action of the wind power so as to drive the coil at the bottom of the rotating block to rotate, so that the coil cuts magnetic induction lines of the magnetic plates all the time, according to the principle of magnetic power generation, the effect of generating electricity by using wind power is achieved, renewable resources are effectively used, and power resourcesare saved.

The invention provides an anti-bird spacer, comprising a protective cover (1) having an arc face; the protective cover (1) is mounted on a base (4) through a spring (2). Birds are dispelled via shaking and voice of the protective cover. The anti-bird spacer is simple in structure, convenient to mount, energy efficient, and environmentally friendly.

The invention relates to the technical field of hailstone prevention for grapes, in particular to an openable-type hailstone-proof device for grape planting. The device aims at solving the technical problems that since hailstone-proof nets can block sunlight, unfruiting or parthenocarpic fruiting of grapes is caused when the grapes lack sunlight, coloring during a mature period is not great, and the sugar degree is lowered. In order to solve the technical problems above, the openable-type hailstone-proof device for grape planting includes four bases, the bottoms of the four bases are all fixedly connected with an anti-skid base, height increasing mechanisms are fixedly connected to the tops of the four bases respectively, an auxiliary power mechanism is arranged on the outer side wall of each height increasing mechanism, and an openable display mechanism is fixedly connected to the tops of the four height increasing mechanisms. Through the openable arrangement, the grapes can be protected from hitting of hailstones and can receive sufficient sunlight, and the labor efficiency of orchard workers is greatly improved.

The invention discloses a fuse on-line monitoring system. The fuse on-line monitoring system comprises a fuse, a monitoring terminal, a communication terminal and a system main station, wherein the monitoring terminal is arranged in a monitoring box in which a bird repelling device is further arranged, the bird repelling device is arranged on the periphery of the monitoring terminal and comprises a spiral structure formed by winding a corrugated plate and bird repellent arranged on the corrugated plate in a coating mode, and a ventilation opening is formed in the monitoring box and corresponds to the spiral structure in position. Running data and the work state of the fuse can be collected in real time, the performance and the quality of the fuse can be conveniently judged, the opening and closing state of the fuse and the power failure and power-on state of loads on the fuse can be known in time, condition-based maintenance can be achieved according to running parameters of a circuit where the fuse is located and running parameters of the loads on the fuse, the bird repellent can be supported due to the arrangement of the corrugated plate and the spiral structure, the coating amount and the diffusing area of the bird repellent are also increased, the diffusing concentration of the bird repellent is guaranteed, a good bird repelling effect is achieved, and installation cost is saved.

The invention provides an energy-saving and environment-friendly bird repelling device for atractylodes macrocephala planting. The device comprises a mounting frame, wherein a wind power mechanism is mounted at the top of the mounting frame, a driving assembly matching the wind power mechanism is mounted inside the mounting frame, the driving assembly comprises a vertical shaft, a conical disc and a rotating ring, a transverse shaft is mounted inside the mounting frame and below the conical disc, reflector sets are installed at the end of the transverse shaft, a noise assembly is connected to the bottom of the rotating ring, and a detection assembly is installed on the transverse shaft. The rotating shaft drives the vertical shaft and the rotating ring to rotate in a differential mode through a speed regulating gear set, the conical disc drives a conical sleeve to rotate and deflect up and down, the reflector sets at the two ends of the transverse shaft swing up and down along with rotation of the transverse shaft, then light reflection areas of the reflector sets are enlarged, the reflector sets can horizontally rotate along with a support base, the light bird repelling effect is improved, the transverse shaft moves a pendulum back and forth and hits a noise plate to make noise, a sound bird repelling function is achieved, and the device is simple in structure, low in use cost, capable of saving energy, environmentally friendly and convenient to use.

The invention discloses an optical cable hanger device for 5G base station construction. The device comprises a mounting plate, two supporting columns are symmetrically and fixedly connected to the lower end of the mounting plate, a first mounting cavity is formed in the mounting plate, a wind wheel is mounted at the upper end of the mounting plate, and a rotating shaft of the wind wheel extends into the first mounting cavity and is provided with a first bevel gear; and a rotating rod is horizontally arranged in the first mounting cavity. According to the device, a worker can conveniently and rapidly install an optical cable through the fixing mechanism, an anti-skid protection pad on the device can ensure that the optical cable is not damaged during installation, a bird repelling mechanism can make a connecting ball make a sound in windy days, the bird repelling effect is achieved, the bird repelling effect is achieved to a certain extent due to the design of the connecting ball when no wind exists, and the bird is avoided from pecking the optical cable. And a reinforcing mechanism can be started in a strong wind environment, so that the fixing effect on the optical cable is improved, and the situation that the shaking amplitude of the optical cable is too large in the strong wind environment, and consequently the device is damaged is avoided.

The invention discloses an orchard bird repelling device based on the agricultural internet of things, belongs to the technical field of orchard bird repelling devices, and solves the problems that bird repelling equipment in the prior art needs to be started for a long time to achieve the bird repelling effect, but under many conditions, no bird exists around an orchard, electric energy is wasted easily when the bird repelling equipment is started for a long time, and the effective working time of the bird repelling equipment is shortened. The orchard bird repelling device comprises a control end, a bird repelling end controlled by the control end to repel birds, and an Internet of Things terminal used for enabling the control end to control the bird repelling end to be started; and the bird repelling end comprises a support, bird repelling devices arranged on the support and distributed in different areas, ultrasonic ranging modules arranged on the bird repelling devices and used for measuring the distance between obstacles in the air, and a judgment module used for judging whether the ultrasonic ranging modules are within a given range or not, and after judgment, and the bird repelling devices work or are still in a standby state according to the feedback result of the judgment module. The orchard bird repelling device is used for repelling birds in orchards.

The invention discloses an anti-toppling telegraph pole with a correction function. The anti-toppling telegraph pole comprises a telegraph pole body fixedly inserted in a foundation, a top frame is fixed at the top of the telegraph pole body, insulators for lapping electric wires are mounted at the bottoms of two sides of the top frame, and the anti-toppling telegraph pole further comprises a supporting mechanism for supporting the telegraph pole body, the supporting mechanism comprises a plurality of spherical hinge seats fixed to the surface of the foundation, the spherical hinge seats are distributed in a circumferential array mode relative to the axis of the telegraph pole body, a fixing plate is fixed to the outer wall of the telegraph pole body, and supporting rods are rotationally connected between the outer wall of the fixing plate and the spherical hinge seats. According to the anti-toppling telegraph pole with the correction function, through cooperation of the structures, the situation that the telegraph pole body is broken from the middle due to the fact that wind power is too large can be prevented, the anti-toppling effect is achieved, meanwhile, after the strong wind weather, the correction effect of automatic righting can be achieved, and the safe circulation performance of a circuit is improved.

The invention discloses a multi-angle bird repelling device for power supply construction. The multi-angle bird repelling device comprises a box body, wherein a hollow rod rotationally connected with the box body is arranged on the side wall of the upper end of the box body in a penetrating mode, three hollow cross rods are installed on the outer wall of the hollow rod, the other ends of the three hollow cross rods are fixedly connected with connecting rods, the other ends of the three connecting rods are fixedly connected with wind cups, a plurality of short pipes are mounted at the bottom of each hollow cross rod, a rotatable bird repelling light reflecting part is mounted at the bottom of each hollow cross rod, a bird repelling agent supply box and a bird repelling agent volatilization box are arranged in the box body, and the bird repelling agent supply box and the bird repelling agent volatilization box are connected through an electromagnetic valve. According to the multi-angle bird repelling device for power supply construction, a bird repelling agent can be automatically added, meanwhile, the rotating speed of the hollow rods can be controlled, stable rotation of the hollow rods can be guaranteed, the bird repelling agent is dispersed in air in a rotating mode, and the bird repelling range can be widened.

The invention discloses a portable rainfall measuring device for meteorological monitoring, which comprises a base, the top of the base is fixedly provided with a rain collecting cylinder, the top of the rain collecting cylinder is fixedly provided with a rain collecting cover, the rain collecting cover is internally and fixedly provided with a filter screen, the inner wall of the right side of the rain collecting cylinder is provided with a water outlet hole, and the water outlet hole is internally provided with a plug cock in a threaded manner; a groove is formed in the bottom of the base, a motor is fixedly installed on the inner wall of the top of the groove, a threaded column is fixedly installed at the output shaft end of the motor, and the threaded column is sleeved with a lifting plate in a threaded mode. The device is reasonable in design and good in practicability, the device can be automatically and stably fixed to the ground, fixation of the device is conveniently relieved, manual operation is not needed, carrying and use are convenient, the effective bird repelling effect can be achieved, birds are prevented from flying to the device to have a rest, and the device is worthy of popularization. Excrement of birds is prevented from dropping on the equipment to cause smudginess and corrosion on the surface of the equipment to aggravate damage of the equipment.

The invention discloses an agricultural bird repelling device with good wind resistance, which comprises a fixed seat and an induced draft plate, wherein the outer wall of the top of the fixed seat isprovided with a vertical rod; the outer wall of the fixed seat is provided with a through hole; the inner wall of the through hole is inserted with a fixed pile; the outer walls of the two ends of the induced draft plate are provided with threaded holes; the inner wall of the threaded holes is connected with a locking screw through threads; the outer wall of the locking screw, which is close to the top end, is connected with a locking nut through the threads; the outer walls of the induced draft plate, which are close to the two ends, are provided with air passing holes; the outer wall of thetop of the upright rod is provided with a storage box; the outer wall of the top of the storage box is provided with a solar cell panel. According to the agricultural bird repelling device with goodwind resistance, the induced draft plate and the air passing holes are arranged; when a large wind force is encountered, the wind force is guided to the two sides by the induced draft plate; the air passing holes are formed in the fixed position of the two sides of the induced draft plate, the wind guided by the induced draft plate is discharged through the air passing holes, so that the impact ofthe bird repelling device is reduced, and the safety performance of the device is improved.

The invention relates to the technical field of base station communication, in particular to a communication base station utilizing the 5G network slicing technology. The communication base station comprises a support, wherein an overhaul platform is correspondingly arranged at the top of the support, a protective fence is correspondingly arranged on the upper surface of the overhaul platform, a supporting column is correspondingly arranged at the center of the upper surface of the overhaul platform, a mounting platform is correspondingly arranged on the outer side of the supporting column, a generator set is correspondingly arranged on the upper surface of the mounting platform, the generator set comprises a fixing frame, wind wheels, a generator, a direction adjusting device and a speed limiting safety mechanism, the fixing frame is correspondingly arranged on the upper surface of the mounting platform, the generator is correspondingly arranged in the fixing frame, and multiple sets of wind wheels are correspondingly arranged at the top of the fixing frame. Compared with an existing communication base station utilizing the 5G network slicing technology, the overall safety, economical efficiency and practicability of the communication base station utilizing the 5G network slicing technology can be improved through design.

The invention discloses a fuse online monitoring system, which includes a fuse, a monitoring terminal, a communication terminal and a system master station. The monitoring terminal is arranged in a monitoring box, and a bird repelling device is arranged in the monitoring box, and the bird repelling device is arranged in the monitoring terminal. On the periphery, the bird repelling device includes a spiral structure formed by winding corrugated plates and a bird repellent coated on the corrugated plates. There are vents on the monitoring box, and the vents correspond to the position of the spiral structure. It can not only collect the operating data and working status of the fuse in real time, but also conveniently judge the performance and quality of the fuse itself, grasp the opening and closing status of the fuse and the power-off status of the load in time, and according to the line where the fuse is located and the load it carries operating parameters to achieve state-of-the-art maintenance, and the setting of the corrugated plate and spiral structure not only supports the bird repellent, but also increases the coating amount and divergence area of ​​the bird repellent to ensure the divergent concentration of the bird repellent, which plays a good role The effect of repelling birds saves installation costs.

The invention discloses a dual-mode energy-storage adjustable-voltage electric-shock bird repelling device, and relates to a bird repelling device. The dual-mode energy-storage adjustable-voltage electric-shock bird repelling device is provided with a solar photovoltaic module and a wind power direct-current generator, the output end of the solar photovoltaic module and the output end of the wind power direct-current generator are connected with the input end of a booster circuit after being connected with the positive pole and the negative pole of a battery in parallel, the output end of the booster circuit is connected with an electric-shock network through an IGBT, and a high-voltage electric-shock main loop is formed; a gravity sensor is arranged below the electric-shock network, the output of the gravity sensor is connected with the signal input end of a microprocessor, the signal output end of the microprocessor is connected with the control end of the booster circuit and the control end of the IGBT, and a control loop is formed. The dual-mode energy-storage adjustable-voltage electric-shock bird repelling device has the advantages that dual-mode electricity generation is achieved by the adoption of solar energy and fans, parallel-connected energy storage is achieved, and stability of a working power source is guaranteed; the microprocessor controls the booster circuit according to the weights and sizes of birds, the magnitude of an electric-shock current is adjusted, powering-on and powering-off of the IGBT are controlled at the same time, the length of electric-shock time is adjusted, and safe and reliable bird-repelling is achieved.

The invention discloses a high-voltage fuse with an online monitoring function. The system comprises a fuse, a monitoring terminal, a communication terminal and a system main station; the monitoring terminal is arranged in the monitoring box; a bird repelling device is arranged in the monitoring box; the bird repelling device is arranged on the periphery of the monitoring terminal; the bird repelling device comprises a spiral structure formed by winding a corrugated plate and a bird repelling agent which coats the corrugated plate; a ventilation opening is formed in the monitoring box; and theventilation opening corresponds to the spiral structure in position. According to the high-voltage fuse with the online monitoring function of the invention, the operation data and working state of the fuse can be collected in real time; the performance and quality of the fuse can be judged conveniently; the opening and closing states of the fuse and the power-off and power-on states of a load carried by the fuse are mastered in time; state maintenance is achieved according to a line where the fuse is located and the operation parameters of the load carried by the fuse; due to the arrangementof the corrugated plate and the spiral structure, a supporting effect on the bird repellent is achieved, and the coating amount and disperse area of the bird repelling agent are increased; and therefore, the disperse concentration of the bird repelling agent is guaranteed, a good bird repelling effect is achieved, and installation cost is saved.

The invention provides a forest fire prevention wireless alarm device, which relates to the technical field of forest fire prevention. The forest fire prevention wireless alarm device includes a rod body, the outer periphery of the rod body is fixedly connected with a solar power generation device, the left end of the rod body is fixedly installed with a bird repelling device, and the top of the rod body is rotatably connected with a turntable. The top end is rotatably connected with a camera, the bottom end of the turntable is fixedly equipped with a first bevel gear, the periphery of the first bevel gear meshes with a second bevel gear, and the right end of the second bevel gear is fixedly connected with a motor. The wireless alarm device for forest fire prevention can drive away birds, avoiding the impact on the normal operation of the wireless alarm device due to birds nesting on the wireless alarm device, and can prevent the glass cover from being affected during the rotation of the camera. The outer side is cleaned to improve the clarity of the image captured by the camera, thereby improving the sensitivity of the wireless alarm device.

The invention discloses a bird repelling device for high-voltage power transmission. The bird repelling device for high-voltage power transmission comprises a box body, an air pump and an air bottle are installed in the box body, the air pump and the air bottle are provided with the same air inlet pipe, an installation pipe is arranged in the box body, the installation pipe and the air bottle are provided with the same air outlet pipe, and an action mechanism is arranged in the installation pipe; the action mechanism comprises a moving block and an annular plate, the sliding moving block is installed in the installation pipe in a sliding and sealing mode, and the annular plate is fixedly installed on the inner wall of the installation pipe. According to the bird repelling device for high-voltage power transmission, through the arrangement of the action mechanism, a colored elastic air bag can be moved out of the installation pipe in time and expanded to cause large visual impact on birds, so that a good bird repelling effect is achieved, meanwhile, the colored elastic air bag can be stored in the installation pipe again after the action is finished, and the installation pipe plays a certain role in protecting the colored elastic air bag, so that the service life of the colored elastic air bag is prolonged to a certain extent.

The invention belongs to the technical field of forest fire prevention, and particularly relates to a forest resource fire prevention monitoring device. The device comprises an electricity storage base, an outer cylinder, an inner cylinder and a height adjusting mechanism, the outer cylinder is fixedly connected to the inner side of the electricity storage base, the height adjusting mechanism is movably connected to the inner side of the outer cylinder, the inner cylinder is movably connected to the inner side of the outer cylinder, the bottom of the inner cylinder is movably connected with the height adjusting mechanism, and the height adjusting mechanism is used for adjusting the horizontal height of the device; the monitoring camera is fixedly connected to the top of the inner cylinder, the height of the monitoring camera can be conveniently adjusted during installation or maintenance, the bird repelling assembly can continuously achieve the bird repelling effect, and the situation that birds nest on the device or bird droppings cover the device when the birds approach the device is avoided; the auxiliary frame mechanism can enable the functionality of the device to be higher, and the arranged electricity storage base can achieve the effect of supplying energy when the device is powered off.

The invention relates to a hydroelectric power generation device with a bird repelling function. The hydroelectric power generation device with the bird repelling function comprises a base, a fixed box, a fixed plate, a power generation mechanism and a bird repelling mechanism, wherein the power generation mechanism comprises a power generation assembly and an adjusting assembly, and the bird repelling mechanism comprises a locating plate, a gong, a bird repelling assembly and a return assembly. According to the hydroelectric power generation device with the bird repelling function, adjusting for a rotating plate is realized through buoyancy of water, one side of the rotating plate is located in the water, the upper portion of the rotating plate makes contact with air, therefore resistance above the rotating plate is reduced, and the power generation efficiency is increased, water flow enters the fixed box through a water inlet groove, and then cooling for a power generator is realized; meanwhile, the heat dissipation effect is improved through the flowing water flow, birds are repelled through sound made by an impact rod and the gong, the rotation of the rotating plate and the heat dissipation of the power generator are realized through impact force of water conservancy; and meanwhile, the operation of the bird repelling mechanism can be realized, and the use practicability is improved.

The invention belongs to the technical field of electric towers, and particularly discloses a high-voltage electric tower which comprises a tower body, the top of the tower body is fixedly connected with one ends of a plurality of fixing rods, the fixing rods are horizontally arranged, the other ends of the fixing rods are jointly connected with a connecting sleeve located in the center of the top of the tower body, and a main shaft rotationally matched with the connecting sleeve penetrates through the connecting sleeve; the lower end of the main shaft is connected with a wind power driving structure, the upper end of the main shaft is connected with a connecting block, the connecting block is fixedly connected with one ends of a plurality of rotating rods, the rotating rods are horizontally arranged, each fixing rod is provided with a sound production mechanism, each sound production mechanism comprises a castanet, and the bottom of each castanet is vertically and fixedly connected with the top surface of the corresponding fixing rod; one side of the bottom of the castanet is rotatably connected with the lower end of a knocking rod through a connecting shaft, and the upper end of the knocking rod is fixedly connected with one end of a spring.

The invention discloses a protection mechanism of a wind direction sensor for a wharf based on a sponge city. The protection mechanism comprises a wind direction sensor body. An anti-pulling mechanismis arranged on the upper side of the wiring end of the wind direction sensor body. A disc base is fixedly mounted at the lower end of the wind direction sensor body; a leveling mechanism is installedat the lower end of the disc base, wind power transmission mechanisms are arranged on the periphery of the disc base, a bird repelling mechanism is arranged in the center of the lower end of the discbase, a connecting mechanism is fixedly installed at the upper end of the left side of the disc base, and a cleaning mechanism is arranged on the right side of the upper end of the connecting mechanism. The cleaning mechanism is arranged, when a conical gear ring in the cleaning mechanism rotates, the brush bristles are driven to rub a gap at the joint of the wind indicator rotating shaft of thewind direction sensor body and the base so that the impurities in the gap can be brushed off to keep the gap clean, the impurities cannot be left in the gap to interfere with the rotation of the windindicator, and the detection precision of the device cannot be affected.

The invention provides a monsoon wind direction recording and detecting device based on wind power generation. The monsoon wind direction recording and detecting device based on wind power generationcomprises a main rod structure, wherein a mounting structure is arranged at the position, close to the top end, of the main rod structure; a support structure is arranged on the mounting structure ina connecting mode; an air plate structure is arranged on the support structure; an auxiliary structure is arranged at the tail end of the support structure; an adjusting structure is fixed to the bottom of the support structure; the main rod structure comprises a main supporting rod, an anemometer and a wind indicator; the anemometer and the wind indicator are respectively and rotatably arranged at the top end of a main support; the anemometer is arranged at the lower end of the wind indicator; an open slot is formed in a spoon opening in the anemometer; wind direction recording and detectingare performed uninterruptedly for a long time; and in order to avoid bird nesting in seasons such as spring and summer, the open slot is formed in the anemometer, so that the anemometer can make a sound through the fluidity of wind speed in the rotating process, and a certain bird repelling effect is achieved.

The invention discloses a bird prevention device for power transmission poles and towers, which comprises a base and a bracket arranged under the base. Bending to form a leg, the lower end of the base is provided with a flange, the flange is sleeved on the bracket and can slide along the length direction of the bracket, and one end of the two brackets passes through the beam are connected to each other, a return spring is arranged on the crossbeam, the flanges are connected to each other through a crossplate, crossbars are respectively arranged on both sides of the base, and blades are respectively arranged on the crossbars, Ventilation holes are provided on the base. The present invention can move the overall structure under the action of wind through the movable base structure. During the reset process of the base structure through the return spring, amplified sound waves are formed, and the rotatable The blades cooperate to play the effect of repelling birds.