128 results about "Photoresistor" patented technology

The invention discloses a multi-energy coupling intelligent power generation device integrating wind power, photovoltaic energy and wave energy, and belongs to the technical field of distributed energy systems. Aiming at the problems of high intermittency, low coupling efficiency, structural redundancy and the like of a traditional system, three power generation units are integrated through a rack: a wave power generation unit adopts a multi-directional articulated shaft-connecting rod-bevel gear pair and spur gear-rack transmission to construct a double-cooperative power generation path, and is matched with a guide rail sliding block and a reset spring; wave multi-degree-of-freedom energy is efficiently captured, and the transmission precision is ensured; the wind power generation unit decelerates and increases torque by using a box-type planetary reducer; and the photovoltaic power generation unit dynamically follows light through the double-shaft holder and the photoresistor array in combination with an MPPT (maximum power point tracking) algorithm. According to the invention, wave energy is mainly used, wind / light is coordinated and complementary, when wind power or photovoltaic power is influenced, the wave energy continuously supplies power, the traditional bottleneck is broken through, stable and efficient energy supply in water areas such as islands and oceans is realized, and compared with a traditional scheme, the wave energy utilization rate and the power supply stability are remarkably improved.

The invention discloses a fresh agricultural product transportation quality monitoring system for in-transit logistics, and relates to the technical field of transportation monitoring. The fresh agricultural product transportation quality monitoring system comprises a multi-path signal acquisition unit, an edge calculation unit, a data processing module, a quality scoring module and a route selection module, the multi-path signal acquisition module integrated sensor comprises a temperature probe, a capacitive humidity sensor, a photoresistor and a high-resolution RGB camera in a carriage, and the sensor is responsible for acquiring the temperature T, humidity RH, illumination Lux and RGB images in the carriage and transmitting the images to the edge calculation module; according to the invention, an ARI MA-LSTM hybrid model is constructed in the quality scoring module, processing and modeling analysis are carried out by using historical temperature, humidity, illumination, chromatic aberration and real-time quality score multi-source information, high-precision prediction of the quality of agricultural products in the future 6 hours is realized, and a decision basis is provided for route selection based on dynamic comparison between a prediction result and a preset threshold value, so that the quality of the agricultural products can be accurately predicted. And the perspectiveness and reliability of quality prediction are effectively improved.

The invention discloses a crack detection device and detection method for cracking of a road lithiation agent material, and relates to the technical field of road crack detection. The crack detection device comprises a connecting mechanism, a detection mechanism and a filling mechanism; the detection mechanism comprises a first lifting frame and a mounting plate, a horizontal air pipe is mounted on the mounting plate, insertion pipes are uniformly mounted on the mounting plate and communicate with the horizontal air pipe, a detection frame is slidably mounted on the insertion pipes, the lower ends of the insertion pipes are sleeved with detection bowls, guide frames are arranged on the two sides of the interior of the detection frame, and connecting columns are arranged on the insertion pipes. A buckling frame is arranged on the first lifting frame, the connecting columns extend to the inner side of the buckling frame and are connected with lamp beads, and a photoresistor strip is arranged in the buckling frame. When a crack exists on the road surface, the detection bowl cannot be driven by airflow to float upwards, the lamp bead is normally on, position data of the crack is converted into a resistance value on the photoresistor strip, and the filling mechanism is controlled to fill the crack by combining the resistance value.

The utility model discloses a supporting device capable of automatically tracking a light source and automatically stretching, retracting and folding a photovoltaic panel, relates to the technical field of photovoltaic panel supporting devices, and solves the technical problems that a solar panel which is unfolded and folded according to the intensity of the light source does not exist in the growth environment of part of plants, and corresponding light source tracking measures are lacked. Comprising a mounting base, and the top of the mounting base is rotationally connected with a first arm, a second arm and a third arm in sequence; the end effector structure is mounted at the end of the third arm; according to the utility model, through the arrangement of the end effector structure, the photovoltaic power supply benefit can be effectively improved, the photoresistor sensing module is used for collecting light source position information, the light source position can be tracked in real time, and the photovoltaic panel can be automatically stretched or folded according to the light source intensity so as to collect solar energy as much as possible; a suitable environment can be provided for commercial crops needing light shielding, the position of a light source can be tracked in real time, shielding is provided in time, and economic benefits are ensured.

A user interface assembly for a domestic appliance includes a control panel; a user interface board; a photoresistor attached to the user interface board, the photoresistor being configured to receive light signals; and a controller operably coupled with the digital image sensor, the controller being configured to perform an operation. The operation may include directing the photoresistor to capture a light signal from at least a portion of the second panel side or from a door of the domestic appliance; analyzing the captured light signal to determine a model identification of the control panel; and activating a predetermined operating software for the domestic appliance based on the determined model identification.

The utility model provides a socket with an indicating lamp brightness adjusting function, and relates to the technical field of sockets, the socket comprises an AC-to-DC module, a USB interface module and a photosensitive module, the input end of the AC-to-DC module is electrically connected with a live wire and a zero line, and the output end of the AC-to-DC module is electrically connected with the input end of the USB interface module; the photosensitive module comprises a photosensitive resistor, a resistor R18, a triode Q1 and an indicating lamp, the first end of the photosensitive resistor and the collector electrode of the triode Q1 are electrically connected with the output end of the USB interface module, the second end of the photosensitive resistor is electrically connected with the base electrode of the triode Q1, the emitter electrode of the triode Q1 is electrically connected with the positive electrode of the indicating lamp through the resistor R18, and the negative electrode of the indicating lamp is grounded. The triode and the photoresistor are additionally arranged on the indicating lamp, so that the brightness of the indicating lamp is controlled, the indicating lamp is normally lightened under high brightness in the daytime and is lightened under low power under low brightness at night, and the indicating lamp of the socket is not dazzling and does not influence sleeping at night.

The utility model relates to the technical field of electronic display, solves the technical problems that in the prior art, power consumption is large, and circuit elements are not protected, and particularly relates to an intelligent electronic table card system which comprises a display screen used for displaying table card content, a processing module used for inputting the display content to the display screen, a voltage transformation circuit and a power supply circuit. An energy-saving circuit used for reducing energy consumption of the display screen is arranged between the display screen and the voltage transformation circuit, the energy-saving circuit is composed of a self-adaptive circuit and a protection circuit, and the self-adaptive circuit is composed of a protection voltage, an adjusting resistor R2, a current-limiting resistor R3, a photoresistor R4, a fixed value resistor R5, a judging device and a self-adaptive voltage. Through the function of the self-adaptive circuit, the brightness of the table card can be automatically adjusted according to the ambient light intensity, the brightness adjustment of the display screen can be completed without manual adjustment, the convenience of a user is improved, and the table card system is more energy-saving and environment-friendly.

This application discloses a cleaning device for producing car floor mats, relating to the field of automotive maintenance equipment technology. It includes a housing, a cleaning component, a moving and rotating component, and a spin-drying component. The cleaning component is located in a cleaning chamber and is used to clean the floor mats. The moving and rotating component is located inside the housing and is used to drive the spin-drying component. The spin-drying component is connected to one side of a movable base and includes a spin-drying frame and a clamping plate. The spin-drying frame is connected to one side of the movable base and includes a photoresistor and an electromagnet. The clamping plate is hinged to one side of the spin-drying frame, and a torsion spring is provided on the hinge axis between the clamping plate and the spin-drying frame. The torsion spring causes the clamping plate and the spin-drying frame to form an angle. A permanent magnet is provided on the side of the clamping plate near the spin-drying frame. The clamping plate includes a lamp for illuminating the photoresistor. This device enables the floor mats to rotate at high speed along with the spin-drying frame, improving the spin-drying and dehydration effect.

The utility model belongs to the technical field of safety warning devices, and relates to a civil construction safety warning indicator which comprises a control box, a single chip microcomputer, a warning tape, a photoresistor, a human body infrared sensor and a power supply module. The single-chip microcomputer is installed in the control box, and a stand column is fixed to the top face of the control box. One end of the warning tape is fixed to the stand column, a traction column used for tensioning the warning tape is arranged at the other end of the warning tape, and an LED lamp strip extending in the length direction of the warning tape is fixed to the front surface of the warning tape. The photoresistor and the human body infrared sensor are fixedly installed on the outer side wall of the top of the stand column. The power supply module, the photoresistor, the human body infrared sensor and the LED lamp strip are all electrically connected with the single-chip microcomputer. According to the warning indicator, pedestrians can be sensed through the human body infrared sensor at night, the LED lamp strip can be controlled to emit light to warn the pedestrians, and the warning effect at night can be enhanced.

According to the stretching and fixing device and method for aging detection of the polyethylene gas pipeline, polyethylene pipes with different diameters are clamped through an inner clamping plate and an outer clamping plate, and the adaptability of the device is effectively improved; the slippage phenomenon of a pipeline in the stretching process is detected through the covering effect of the polyethylene pipe on the array type light dependent resistor, the array type light dependent resistor calculates the slippage distance of the polyethylene pipe by detecting the change of the length of the array type light dependent resistor irradiated by the lamp strip, and therefore on one hand, the clamping force is enhanced by increasing the current of the electromagnetic pad; and on the other hand, compensation is carried out by adjusting the movement length of the sliding seat to be equal to the slippage distance, so that the pressure load borne by the pipeline is kept unchanged, and the accuracy of experimental parameters is ensured.

The invention provides an induction type intelligent illuminating lamp. The induction type intelligent illuminating lamp comprises a microprocessor, an infrared inductor, an ultrasonic inductor, a photoresistor sensor, a WIFI module, a storage module and an LED light source. The WIFI module, the infrared sensor, the ultrasonic sensor and the photoresistor sensor are respectively connected to a signal input end of the microprocessor; the signal output end of the microprocessor is connected to the LED light source; the photosensitive sensor is used for monitoring the intensity of ambient light; the infrared sensor and the ultrasonic sensor are used for detecting human body movement conditions; the temperature sensor is used for measuring the indoor temperature.

The invention provides a zoom type optical signal gain regulator and a circuit, the zoom type optical signal gain regulator comprises a support, the support is provided with a light-emitting part, a convex lens, a photoresistor and an adjusting part, the convex lens is arranged between the light-emitting part and the photoresistor, and the adjusting part is arranged between the light-emitting part and the photoresistor. The light emitting part is used for emitting parallel light to the convex lens and irradiating the parallel light on the photoresistor, the adjusting part is used for adjusting the distance between the photoresistor and the convex lens, and the focus of the convex lens is located between the photoresistor and the convex lens. According to the optical principle of focusing of the convex lens, the distance between the photoresistor and the convex lens is precisely changed through the adjusting piece, so that the light intensity irradiated on the photoresistor is continuously changed, the resistance value of the photoresistor is changed smoothly and is wide in range through the adjusting mode based on geometrical optics, stepless continuous gain adjustment is achieved, and the precision of the light intensity is improved. The adjusting precision is high.

This invention provides an automatic dimming lighting power supply, relating to the field of lighting power supply technology. The automatic dimming lighting power supply includes a main body with a placement groove on its surface. Considering the problems of lighting power supplies, this invention incorporates a linked combination structure of a photoresistor, a microcontroller, and an LED lighting module on one side of the main body. First, the photoresistor detects the external light intensity. As the light intensity changes, the detected signal is transmitted to the microcontroller on one side for analysis and processing. Second, the microcontroller controls the output voltage to adjust the output power of the LED lighting module, thereby ultimately controlling the light intensity of the LED lighting module, achieving an automatic adjustment effect. This automatic dimming power supply technology can automatically adjust the brightness of the lighting fixture according to changes in the brightness of the environment, achieving both energy saving and lighting comfort.

An LED indicating device for X-ray detection comprises a transparent protective layer, a transparent conductive layer, an LED chip layer, an optical resistance layer, a back electrode layer, an outer electrode lead and a core electrode. The LED light source is characterized in that the LED chip layer is composed of LED chips, the LED chip layer is tightly clamped between the transparent conducting layer and the light resistance layer, and the back electrode layer or the core electrode is loaded behind the light resistance layer; 3-12V alternating current and direct current are loaded on the transparent conducting layer, the back electrode layer or the core electrode, the LED chip layer emits light, the resistance of the photoresistance layer changes when X-rays irradiate, and the luminous intensity of the LED chip changes accordingly.

The invention discloses a hardware part machining and welding device. The hardware part machining and welding device comprises a gap alignment assembly, a self-adaptive fixing structure, a rotary drum, a movable welding assembly, a main body motor support, a main body driving motor and an equipment base. The invention belongs to the technical field of motor shell welding. The motor shell edge seam detection device is designed according to the electrical principle of the ultraviolet photoresistor and the ultraviolet laser beam emitter, when ultraviolet laser emitted by the ultraviolet laser beam emitter can penetrate through the side seam of the motor shell to be emitted to the ultraviolet photoresistor, the side plate is turned over to clamp the motor shell from the outside, and then the position of the side seam of the motor shell is determined; and when the ultraviolet laser emitted by the ultraviolet laser beam emitter is not emitted to the ultraviolet photosensitive resistor, the ultraviolet laser does not pass through the side seam of the motor shell at the moment, and the overturning side plate can overturn by virtue of the hinge shaft without limiting the rotation of the motor shell along with the rotary drum, so that automatic control is realized.

The invention relates to the technical field of photovoltaic panel cleaning, and particularly discloses a solar photovoltaic power generation automatic control device which comprises a support, the outer surface of the support is fixedly connected with a photovoltaic panel, the center position of the support is fixedly connected with a photoresistor, and a water pumping pipe is adopted to directly utilize water pressure to push a sliding block to slide, so that the photovoltaic panel can be automatically controlled. When water is supplied to the cleaning pipe, the sliding body is driven to slide along the guide groove under pulling of the first traction rope and the second traction rope, then the driving wheel transmits power to drive the cleaning pipe to rotate, the photovoltaic panel is cleaned through bristles on the surface of the cleaning pipe, and the cleaning efficiency of the photovoltaic panel can be greatly improved; when dust on the surface of the photovoltaic panel is accumulated to a certain degree, the photoresistor can generate voltage conversion to transmit an electric signal to the water pump to control the water pump to pump water, and through mutual cooperation of the structures, flushing can be achieved, and the photovoltaic panel can be effectively cleaned in time.

The application discloses a wireless laser charging method and system based on a UAV, relates to the technical field of UAV charging, and comprises the following steps: collimating divergent light beams into parallel light beams through a laser emitter device and expanding the diameter of the input light beams; converting the laser charging signals into electric energy through a photovoltaic array, and charging the UAV through a constant current circuit; monitoring the current and voltage in the charging process in real time through the charging control, and judging whether the charging current needs to be adjusted according to the monitored data. The application charges the UAV wirelessly without connecting a power line, judges the central position of the battery panel light spot by comparing the intensity of the laser light source and the output voltage of the photoresistor, thereby realizing accurate control of the charging process, avoiding energy waste and overcharging of the battery in the charging process, charging the UAV through a constant current circuit, avoiding the battery short circuit hidden danger caused by overcharging, and thereby ensuring the stability and safety of the UAV charging.

The utility model discloses a reflective photoelectric detection device, relates to the technical field of switch control circuits, and overcomes the defect that passenger safety and obstacle recognition accuracy cannot be considered at the same time in the prior art. According to the utility model, the mirror surface reflective photoelectric sensor which is small in size and stronger in anti-interference capability is matched with the photoresistor, so that tiny objects or transparent and semitransparent objects can be detected. According to the utility model, the emitter is matched with the reflective mirror, so that a light source of the emitter forms multiple paths of light to be identified by the receiver after passing through the reflective mirror, and the receiver changes the self resistance value based on the intensity of the light so as to further control the on-off of the photoelectric switch, further change the input signal of the PLC and further change the opening and closing state of the shielding door. The sensor provided by the utility model can respond to environmental changes more quickly, ensures that the opening and closing operation of the shielding door is more timely, and is helpful for preventing unnecessary waiting or potential safety hazards caused by response lag.

The present application relates to a kind of light control calibration tool and light control dynamic calibration method.The light control calibration tool of the present application particularly includes controllable photoresistor branch, and by means of known resistance branch and voltage measurement branch, the controllable resistance value of controllable photoresistor branch can be accurately calculated, then using the characteristics that the resistance of photoresistor in controllable photoresistor branch is controllable under illumination, and its own resistance is stable, any required accurate resistance value for calibration is provided, without frequently replacing standard resistance sheet, avoid the damage of calibration instrument to improve safety, while also with high flexibility, the test of different range resistance value of the equipment to be measured can be completed, finally realizing the high safety, flexible and accurate dynamic calibration of the equipment to be measured.

The utility model discloses a flapping wing mechanism of a miniature bionic flapping wing aircraft, which comprises a fixed base, a brushless motor is fixedly arranged outside the fixed base, and a rotating shaft is arranged at the output end of the brushless motor; the reduction gear set comprises a small gear, a large gear, a transmission gear and a crank gear, and an arc-shaped notch is formed in the outer portion of the crank gear; a transmission shaft is fixedly connected outside the large gear, and a transmission gear is fixedly connected outside the transmission shaft. A bidirectional self-maintaining push-pull type electromagnet is arranged at the rear end of the fixed base, and a first photoresistor and a second photoresistor are arranged at the lower end of the fixed base in parallel; and wing rotating shafts are rotationally connected outside the fixed bases. The dihedral angle of the flapping wing mechanism of the miniature bionic flapping wing aircraft can be fixed, the flapping wing mechanism can rapidly switch the wing flapping state and the wing fixing state, the dihedral angle of the wing is fixed through the locking structure, and therefore the flight efficiency of the bionic flapping wing aircraft is improved.

The utility model discloses a dimming circuit of a self-adaptive silkworm breeding system. The dimming circuit comprises a photoresistor, a double-voltage comparator, a bidirectional analog switch, an optical coupler and a constant-current light-emitting circuit, wherein the input end of the double-voltage comparator is coupled with the photoresistor; the control end of the bidirectional analog switch is coupled with the output end of the double-voltage comparator, the output end of the bidirectional analog switch is coupled with a light-emitting source of the optical coupler, and a light receiver of the optical coupler is coupled with the constant-current light-emitting circuit. According to the dimming circuit of the self-adaptive silkworm breeding system, an original photoresistor and a double-voltage comparator are reserved, and a bidirectional analog switch, an optical coupler and a constant-current light-emitting circuit are added. The double-voltage comparator compares and guides the bidirectional analog switch and then switches on the constant-current light-emitting circuit through the optical coupler, and the constant-current light-emitting circuit carries out constant-current adjustment on the input current, so that accurate adjustment of the light brightness is realized.

The invention discloses a dual-bus self-switching display interface and a non-inductive backlight adjusting method and system, which integrate automatic identification of dual-bus MIPI DSI and LVDS, IOVDD level self-adaptive configuration, level self-switching matching and an integral non-inductive backlight adjusting method based on image acquisition, and realize plug and play and automatic compatibility of the display interface. The display module with different power supply levels and communication protocols can be adapted without manual intervention, electrical compatibility of reset, IC, interrupt and other signals under different IOVDD is ensured through the level self-switching circuit, the system robustness is improved, the ambient brightness is analyzed by using a camera image, real non-inductive backlight adjustment is realized, and the display quality is improved. The problem that a traditional photoresistor is prone to being affected by shielding or aging is avoided, the hardware cost and BOM complexity are reduced through the overall scheme, and meanwhile user experience and product universality are improved.

There is provided a Quantum system for a centralized and cloud-based, real-time merchandise inventory monitoring system. This system comprises multiple layers or shells αp, αa, αd, αe, αc, and αc1 represent perception, analog signals, digital signals, Ethernet processing, the cloud database, and client apps and processes, respectively. Connections βpa, βad, βde, βec and βcc1 represent (1) analog signal generation, (2) analog signal-to-digital signal conversion, (3) signal processing and real-time inventory data generation in the Ethernet, (4) data transferred from the Ethernet space to the cloud database, and (5) client apps and processes sending requests for data and services to the cloud database through the public API. These connections are represented from lower to higher levels, respectively. A node comprises ap, da and ad. The multiple layers or shells perform as a quantum structure working for data generation and communications. One embodiment of a shelving system comprised by individual tracks with photoresistors is used to show the system monitoring the real-time on shelf merchandise inventory.

The invention discloses a spark-gap-based power transmission line discharge detection device carried by an unmanned aerial vehicle, and belongs to the technical field of discharge detection, the spark-gap-based power transmission line discharge detection device comprises an external combination, a storage combination and a detection combination, and the detection combination comprises an induced electric breakdown module which enables a non-uniform electric field induced voltage to form a relatively high potential difference to cause air gap breakdown; the invention relates to an electric field sensor which is composed of four electrodes with balls at the tail ends, the distances from each electrode to the other three electrodes are the same, and when an electric field is not uniform, the potential difference between the electrodes is possibly too high, so that air breakdown is caused. The light acquisition module is used for acquiring the brightness of electric sparks caused by breakdown, consists of a photoresistor and an operational amplifier, and is used for monitoring whether the induced electric breakdown module is broken down or not in real time, measuring the illumination intensity caused by breakdown and judging the strength of breakdown; and the buzzing light alarm module is used for emitting harsh sound. The spark gap-based power transmission line discharge detection device carried by the unmanned aerial vehicle is high in detection speed and high in detection efficiency.

The invention discloses an automatic real-time monitoring device for building foundation settlement, and particularly relates to a ground and a foundation, the foundation is installed in the ground, a monitoring cavity is formed between the ground and the foundation, and a transverse monitoring mechanism used for monitoring horizontal deviation of the foundation is arranged in the monitoring cavity; and a longitudinal monitoring mechanism for monitoring the vertical settlement of the foundation is arranged in the monitoring cavity. According to the automatic real-time monitoring device for building foundation settlement, through the designed transverse monitoring mechanism, when a foundation deviates in the horizontal direction due to the load effect and the geological condition change, due to the deviation of the foundation, light beams emitted by a laser generator will deviate from light holes formed in a box body at the moment, and the settlement of the foundation is monitored in real time; the light beam emitted by the laser generator cannot irradiate the surface of the photoresistor, the resistance value of the photoresistor is increased, the power supply in the alarm is in a disconnected state, and the alarm is turned off, so that building personnel are reminded of horizontal deviation of the foundation, and horizontal deviation monitoring of the foundation is realized.

This utility model discloses a makeup mirror capable of automatic fill light adjustment. Its structure includes a mirror shell and a support base. The bottom of the mirror shell is fixedly connected to the support base. Light-transmitting films are installed on both sides of the front end of the mirror shell, and a control button is located at the bottom of the front end. The mirror shell includes a control circuit board located at its inner bottom. Dimming devices are located on both sides of the interior of the mirror shell, and a display screen is installed in the center of the interior. This utility model utilizes the dimming device in conjunction with a photoresistor to detect light. When the detected light brightness is too bright or too dim, a servo motor drives a gear to mesh with the bottom of a light guide tube, causing it to rotate. This allows light-blocking coatings of different thicknesses on the end face of the light guide tube to block the light, achieving different light intensities and realizing the fill light and dimming effect on the face during makeup application.

A light-driven frequency-band tunable electromagnetic shielding device is provided. The device includes photodiodes, photoresistors, square graphite felt films, polyvinylidene fluoride films, nickel-cobalt alloy films, a grounding metal layer, and a silicon substrate layer. The photodiodes are disposed in holes of the square graphite felt films and around the electromagnetic shielding device. Ends of the photodiodes are directly connected to ends of the photoresistors, and other ends of the photodiodes are connected to the square graphite felt films. Other ends of the photoresistors are connected to the grounding metal layer. The polyvinylidene fluoride films are adhered with the square graphite felt films, and the square graphite felt films are adhered with the nickel-cobalt alloy films. The polyvinylidene fluoride films are adhered to the grounding metal layer, and the grounding metal layer is adhered to the silicon substrate layer.

The application discloses a kind of light-driven frequency band adjustable electromagnetic shielding devices, belong to electromagnetic wave antenna design and electromagnetic compatibility design technical field, including: photodiode, photoresistor, square graphite felt film, polybisfluoroethylene film, nickel-cobalt alloy film, ground metal layer and silicon substrate layer;Photodiode is arranged in the hole of square graphite felt film and the periphery of electromagnetic shielding device, one end of photodiode is directly connected with one end of photoresistor, and the other end is connected with square graphite felt film;The other end of photoresistor is connected with ground metal layer;Polybisfluoroethylene film is pasted with square graphite felt film, square graphite felt film is pasted with nickel-cobalt alloy film;Polybisfluoroethylene film is pasted on ground metal layer, and ground metal layer is pasted on silicon substrate layer.The application does not need radio frequency drive, and the dynamic adjustment of super-structured space electromagnetic suppression structure operating frequency is realized by the pressure difference of photodiode and photoresistor, and electromagnetic shielding is completed.

The utility model relates to the technical field of railway bird repelling, and discloses a railway bird repelling device based on multi-sensor fusion, which comprises a box body, the box body is at least provided with a first surface, a second surface and a third surface which are continuously connected, and the first surface, the second surface and the third surface respectively face different directions. The first surface and the third surface are both provided with microwave radars, the second surface is provided with an infrared radar and a photoresistor, the photoresistor is electrically connected with the microwave radars and the infrared radar, and the photoresistor is used for detecting daytime and night environments so as to start the microwave radars and the infrared radars in daytime. According to the bird repelling device, the infrared radar device detects birds, the birds are repelled through voice, ultrasonic waves or a strong light LED lamp, the photosensitive resistor is electrically connected with the microwave radar and the pyroelectric induction radar, the device works in the daytime and avoids disturbing residents, and through cooperation of microwave radar detection and the pyroelectric induction radar, the detection accuracy is improved, and the birds are accurately repelled.

The utility model provides a light supplementing device for a handle focus fixing frame of handheld laser equipment. The light supplementing device comprises an annular circuit board, an LED lamp, an adjusting resistor, a photoresistor, a bridging terminal P1, a bridging terminal P2 and a bridging terminal P3. The annular circuit board is provided with an LED lamp, an adjusting resistor, a photoresistor, a bridging terminal P1, a bridging terminal P2 and a bridging terminal P3; the LED lamp, the adjusting resistor and the photoresistor form a brightness adjusting circuit; the adjusting resistor manually calibrates the circuit voltage; the photoresistor can change the resistance value according to the surrounding brightness so as to automatically adjust the brightness. Compared with the prior art, the utility model has the following beneficial effects: on one hand, the light supplementing device is installed at one side of the exhaust fan to supplement light for a marking area without influencing the smoke discharge of the exhaust fan, so that the marking process can be more intuitively felt, and the use experience and the operation flexibility of an operator are improved; and on the other hand, wire harnesses around the field lens are integrated into the field lens, so that the safety is enhanced, and the aesthetic property of the equipment is improved.