527 results about "Microcomputer" patented technology

The invention relates to an expressway road condition monitoring system and method, and belongs to the field of expressway road condition monitoring, and the system comprises an ultrasonic sensor which is used for detecting whether branches grow into a guardrail of an expressway or not; the pressure sensor is arranged on the guardrail of the expressway and is used for detecting whether the guardrail of the expressway is bent or not; the image recognition module is used for detecting whether a traffic accident occurs in the target road section; the ESP32 single-chip microcomputer is connected with the temperature and humidity sensor, the ultrasonic sensor and the pressure sensor and gives an alarm when the branches grow into the guardrail of the expressway, whether the guardrail of the expressway is bent or not and a traffic accident happens to a target road section. According to the invention, through the strong operation processing capability and low power consumption characteristic of the ESP32, in combination with various sensors such as ultrasonic, pressure, temperature and humidity sensors of the image recognition module, complex road condition scenes can be accurately analyzed, and abnormal conditions such as traffic accidents can be timely captured, so that road condition monitoring is more comprehensive and meticulous.

An air conditioner includes a refrigerant circuit, a main board, and a backup board. The refrigerant circuit includes a shutoff valve that shuts off a refrigerant flow. The main board includes a microcomputer that controls the shutoff valve. The backup board supplies power from a capacitor to the main board. The backup board includes a charging circuit that receives power supply from an outside and charges the capacitor. The microcomputer detects whether the backup board is connected to the main board based on a voltage on the upstream side of the charging circuit.

The utility model discloses a semi-automatic straight pipe double-end spot welding machine, which relates to the technical field of spot welding machines and comprises a base, and a left terminal piece feeding mechanism and a right terminal piece feeding mechanism are arranged on two sides of the top of the base. A fixing piece direction rotating mechanism, a spot welding mechanism, a clamping mechanism, a two-color buzzer, a PLC microcomputer controller and a discharging mechanism are arranged in the center of the top of the base. According to the double-end spot welding machine, the servo motor power transmission component, the up-down air cylinder, the push-out air cylinder, the parallel opening and closing finger air cylinder, the fixed piece direction rotating component and the like are integrated, and automatic operation of a series of steps including heating pipe feeding, clamping, transferring, rotary centering, terminal piece processing, pushing, welding and the like is achieved. Compared with the prior art, manual participation links are greatly reduced, the requirement for the technical level of operators is lowered, basic operation can be conducted without technicians or operators, the range of the operators is expanded, and the training cost and the time cost are reduced.

The invention discloses a microcomputer misoperation-preventive locking system applied to a centralized control center power distribution system, which belongs to the technical field of centralized control center power distribution systems and comprises a construction module, a detection module, an unlocking request module, a microcomputer module and an unlocking module. The method comprises the following steps: shooting a face image of a worker before unlocking, comparing the shot face image of the worker with a pre-stored face image of a specific unlocking operator, and automatically triggering an unlocking request when the face image of the worker and the face image of the pre-stored specific unlocking operator exist; an image with a worker ID is shot before unlocking, any three numbers in the worker ID in the image are randomly selected to be randomly combined, after the combination with a current timestamp and the randomly combined numbers is used as an unlocking password to be sent and displayed, whether the input unlocking password is consistent or not is collected, and unlocking is conducted when the input unlocking password is consistent. The unlocking password is randomly generated, has uncertainty and cannot be cracked, stolen and copied through technical means, and the possibility of illegal unlocking is completely eradicated.

To properly execute re-energization control when a fuel injection valve is closed.SOLUTION: The fuel injection system includes a fuel injection valve 50 for injecting gas fuel, and a drive circuit for opening the fuel injection valve 50. The drive circuit includes a low-voltage power supply 64 and a boosting power supply 65. The microcomputer 61 of the ECU60 includes a re-energization control unit configured to be capable of executing first re-energization in which re-energization of the solenoid is executed by the low-voltage power source 64 and second re-energization in which re-energization of the solenoid is executed by the boost power source 65 during a valve closing operation of the valve body accompanying the end of injection of the fuel injection valve 50, and a parameter acquiring unit configured to acquire an influence parameter in which variation of a valve closing timing at which the valve body reaches a valve closing position at the time of closing of the fuel injection valve 50 affects an actual injection amount; The re-energization control unit selectively executes the first re-energization and the second re-energization based on the influence parameter acquired by the parameter acquisition unit.SELECTED DRAWING: Figure 1

The utility model discloses microcomputer interlocking equipment for railway logistics, which comprises a control table, a monitoring machine, and an interlocking machine, a meter holding machine, an electric service maintenance machine, a power distribution cabinet and an interface frame which are arranged in a heat dissipation cabinet, and the heat dissipation cabinet is provided with an air outlet pipe and an air inlet pipe internally provided with a heat dissipation fan. The air outlet pipe and the air inlet pipe are both connected with an annular installation cover composed of a first cover body and a second cover body and communicate with an inner cavity of the annular installation cover, a rotating shaft is rotationally arranged at the axis position of the annular installation cover through a sealing bearing, the rotating shaft is fixedly sleeved with an inner ring in a sealed mode, and an outer ring is arranged on the periphery of the inner ring. The two side ends of the inner ring and the two side ends of the outer ring are each provided with an interception net, material storage gaps are formed between the two interception nets and the inner ring and between the two interception nets and the outer ring, and granular drying agents are arranged in the material storage gaps. According to the heat dissipation cabinet of the microcomputer interlocking equipment, the influence of moisture on the working efficiency of the equipment is reduced, and the dehumidification cost is also reduced.

The embodiment of the utility model provides a reversible micro host, which comprises a host body, the long side surface of which is provided with a USB interface, a display interface and a power supply interface; supporting legs are rotatably arranged on the short side face of the machine body. The supporting legs are perpendicular to the front face and the back face of the machine body after rotating by 90 degrees or 270 degrees. The rotatable supporting legs are arranged on the short side faces of the machine body, and the supporting legs are perpendicular to the front face and the back face of the machine body after rotating by 90 degrees or 270 degrees, so that the front face and the back face of the micro-host can be overturned and placed in the horizontal state. A user can flexibly adjust the placement direction of the host according to the actual space and the use scene, the host can be stably placed whether in the original vertical state or in the horizontal state after rotation, and the limitation of a traditional microcomputer in the placement mode is greatly broken through.

A vehicle control unit, including: a first control unit (2-1) with a microcomputer (15) that detects a state of an actuating switch (16) of an electrical component (3), monitors a signal indicating a state of an ignition key and controls the electrical component (3); and characterized by a second control unit (2-2) which is connected to the first control unit (2-1) via a vehicle-internal network (1a, 1b), where the microcomputer (15) when the actuating switch (16) of the electrical component (3) in the first control unit (2-1) is determined to be in an ON state for a longer period of time and the ignition key is determined to be in an OFF state, data transmission from the first control unit (2-1) to the second control unit (2-2) is interrupted, or the first control unit (2-1) is put into a receive-only mode, a driver of a vehicle is notified of a fault and performs a process to detect the cancellation of a longer-term on-state of the actuating switch (16), if the actuating switch (16) of the electrical component (3) is determined to be in the on-state for a longer period of time and the ignition key is determined to be in the on-state, and stores an error report in a memory device and interrupts the notification of the driver if the long-term on state of the actuating switch (16) persists continuously for a certain number of times or continuously for a certain period of time when the ignition key is in the off state after the process for detecting the cancellation of the long-term on state of the actuating switch (16).

A multispectral luminosity three-dimensional imaging system based on a nanocrystalline color conversion light source comprises a nanocrystalline light source module, an illumination control module, an image acquisition module and a three-dimensional reconstruction calculation module. The nanocrystalline light source module realizes multi-band accurate illumination; the illumination control module realizes independent lighting of a light source channel by channel based on a shift register and a single chip microcomputer, and outputs a synchronous trigger signal to a camera, so that each image corresponds to the unique light source direction; the image acquisition module acquires a multi-wavelength and multi-direction reflection image sequence, and uses a mask to limit an effective area; and the three-dimensional reconstruction calculation module estimates the light source direction, performs photometric stereo solution on each spectral channel, reconstructs a complete three-dimensional surface topography through cross-channel normal fusion and Poisson depth recovery, and generates a multispectral albedo graph and a pseudo-color normal graph. According to the invention, the stability and precision of normal estimation and depth recovery under a complex material surface are improved, and miniaturized, high-fidelity and multiband photometric three-dimensional imaging is realized.

To provide a battery monitoring system, a battery monitoring device, and a voltage measurement device that can reduce a synchronization shift in measurement timing.SOLUTION: A battery monitoring system according to an embodiment includes: a current measurement device that measures a current in a battery to output a current value; a voltage measurement circuit that measures a voltage in the battery; a first microcomputer that controls the voltage measurement circuit; a voltage measurement device including a first wireless communication unit that wirelessly outputs a measured voltage value; a second wireless communication unit that wirelessly communicates with the first wireless communication unit; and a battery monitoring device including a second microcomputer that receives the current value and the voltage value. The second microcomputer outputs a current measurement request signal to the current measurement device after the lapse of a first time based on an output signal from the second wireless communication unit. The first microcomputer exerts control such that the voltage measurement circuit measures the voltage after the lapse of a second time synchronized with the first time based on an output signal from the first wireless communication unit.SELECTED DRAWING: Figure 2B

The invention discloses a device and a method for automatically rescuing an elevator by adopting a new energy electric vehicle power supply, when the elevator is suddenly powered off and at the moment of power failure, an elevator microcomputer board sends acquired elevator state data to a remote monitoring system, and the remote monitoring system judges whether passengers or cargos are trapped in a lift car according to the elevator state data; when passengers or cargoes are trapped, the remote monitoring system automatically uploads rescue information to the cloud platform, the cloud platform issues the rescue information to enable the new energy electric vehicle to arrive at a designated parking space, an external discharge interface of the new energy electric vehicle is connected with an elevator emergency power supply interface, and a connection signal is given to the control cabinet; and after the elevator is powered on, automatic rescue operation is conducted to the nearest floor level position, the door is opened to release passengers, and rescue is completed. A new energy electric vehicle is adopted as an emergency rescue power supply after elevator power failure, and the emergency rescue power supply aims to deal with the situation that passengers or goods are trapped in a lift car due to sudden power failure of a power grid and the elevator is not provided with a power failure cabinet function during normal operation of the elevator, and rapid rescue is carried out.

The utility model relates to the technical field of color printing carton processing, in particular to an auxiliary fixing mechanism for color printing carton processing, which comprises two symmetrically arranged racks, two sliding rods parallelly mounted between the two racks, a plurality of pressing frames equidistantly mounted on the two sliding rods and rubber pressing rollers rotatably mounted on two sides of the lower ends of the pressing frames. And a transverse frame is fixedly connected between the middle parts of the upper ends of the two racks. According to the automatic correction device, an original auxiliary fixing mechanism is scientifically and reasonably improved, and the transverse frame, the rotating rod, the transmission connecting rod, the transmission sliding column, the servo motor, the image acquisition module and the microcomputer controller are arranged between the rack and the two sliding rods, so that automatic correction operation can be carried out on a color printing paperboard in the auxiliary fixing process; according to the auxiliary fixing mechanism, the color printing paperboards can be quickly adjusted to be in a regular state, the problems of deviation, dislocation and the like in the conveying process of the color printing paperboards are effectively reduced, and therefore the functionality and the machining stability of the auxiliary fixing mechanism are improved.

The utility model relates to a kind of double-finned double-air duct microcomputer heat pipe radiator of staggered layout, be equipped in CPU chip on mini PC, including heat dissipation blower and the heat dissipation device that is attached on the heat dissipation blower, the heat dissipation device includes heat dissipation copper sheet group, heat pipe group, fin group and chip radiator baseplate.The chip radiator baseplate is attached on CPU chip, and the heat generated by CPU chip is quickly conducted to the heat pipe group, the heat dissipation copper sheet group and the fin group, realizes the quick conduction of heat, and the heat dissipation blower is provided with double air duct, and the air outlet of each air duct is provided with fin, and the design of double fin increases the heat dissipation area of the radiator, reduces the wind speed flowing through the fin under the condition that the total air volume of the heat dissipation blower is unchanged, reduces the noise of the heat dissipation blower, and ensures the heat dissipation effect of equipment.

The utility model discloses a magnetic resonance energy transfer wireless charging device, comprising a transmitting module comprising a rectification filter circuit, a transmitting circuit and a transmitting coil, the rectification filter circuit is configured to be used for converting power frequency alternating current into pulse direct current, the transmitting circuit is configured to be used for converting the pulse direct current into electromagnetic wave signals, and the transmitting coil is configured to be used for transmitting the electromagnetic wave signals; the transmitting coil is configured to be used for transmitting an electromagnetic wave signal; the receiving module comprises a receiving circuit, a receiving coil, a single chip microcomputer and lighting equipment, the receiving coil is configured to be used for receiving electromagnetic wave signals, and the receiving circuit is configured to convert the electromagnetic wave signals into pulse direct current to supply power to the lighting equipment; the single-chip microcomputer is configured to be used for realizing PWM dimming and / or switch control of the lighting equipment.

To provide a centrifuge in which over-rotation of a rotor is doubly monitored by software and an electric circuit, and a protection mechanism for maintaining a door lock state during rotation of the rotor is also doubled.SOLUTION: In addition to a function of monitoring over-rotation of a rotor 11 by software executed by a microcomputer 50, speed monitoring is performed by a rotation signal processing circuit 51 realized by a circuit configuration. When the over-rotation of the rotor is generated, an over-rotation signal for stopping the rotation of the motor 13 is transmitted to a motor driving circuit by an over-rotation detecting circuit 60. The set value of the monitoring speed is set in the data output holding circuit 53, and can be arbitrarily set from the control device 50. Further, a door lock control circuit 70 is provided to maintain the locked state of the door lock 20 until the rotor 11 stops. Even if the operation of the software falls into an abnormal state, the rotation signal processing circuit 51 ensures the protection function from overspeed and the maintenance of the door lock state during the rotation of the rotor 11.SELECTED DRAWING: Figure 2

The utility model provides a test fixture for a circuit board of a lifting table, which comprises a bottom table, the bottom table is a hollow box body, and a microcomputer controller is connected in the bottom table. The top surface of the bottom table is connected with a circuit board fixing plate through a spring sliding mechanism, and the top surface of the bottom table is connected with a probe. A pressing device is arranged on the upper side of the circuit board fixing plate and connected to the top face of the bottom table. The top surface of the bottom table is connected with a simulation lifting mechanism; and the simulation lifting mechanism is electrically connected with the microcomputer controller. The device detects the functions of the circuit board of the lifting table, simulates the working state of the lifting table, monitors the working current, the working voltage, the remote control module power supply and the signal power supply, verifies the key functions of the limit switch logic, the operation mode switching and the like, ensures that the lifting table stops in time when reaching the limit position, and evaluates the reliability and the safety of the circuit board.

To enhance the gaming appeal. 【Solution】On the front door 23, normal buttons 40 and lever buttons 42 that can be operated by the player are provided. The effect control microcomputer 121 can execute a character voice preview in which the movable body LEDs 55LL and 55RL of the on-board movable body 55k emit light in the special figure variation effect. In the character voice preview, during the operation valid period, the main character image G200 is displayed on the display unit 50a in response to the operation of the normal button 40 or the lever button 42. When the normal button 40 is operated, the main character image G200 is displayed as a moving image, and when the lever button 42 is operated, the main character image G200 is displayed as a still image.

To provide a gaming machine that contributes to enhancing the enjoyment of the game through the performance. 【Solution means】The game control microcomputer 101 can execute a big win game based on the result of the big win determination. The performance control microcomputer 121 can stop and display the left performance symbol EZ1 and the right performance symbol EZ3 at the reach target in the special figure variation performance, and can execute a reach symbol action notice accompanied by the actions of the left performance symbol EZ1 and the right performance symbol EZ3 when the reach target is displayed. In the reach symbol action notice, the left performance symbol EZ1 and the right performance symbol EZ3 constituting the reach target may be enlarged.

To enhance the enjoyment of games. [Solution] The game board 1 is provided with a specific lamp device 54T and a non-specific lamp device 54H as board lamps 54. The performance control microcomputer 121 can execute a stop notification in which the specific lamp device 54T lights up and the non-specific lamp device 54H blinks when the special symbol is stopped, and can execute a lamp off notification in which the specific lamp device 54T turns off and the non-specific lamp device 54H lights up when the special symbol is changed. In the lamp off notification, the specific lamp device 54T may remain off until the timing when a reach is established, or until the timing when the special symbol change performance ends.

1. The name of the design product: charger shell (high-power microcomputer intelligent electronic type). 2. The use of the design product: for charger shell. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view.

The utility model provides a carbon black iodine absorption value measuring device which comprises a rotating wheel disc, a magnetic stirrer, a transmission filtering device and a reaction tank, a plurality of sample cups can be placed on the rotating wheel disc, after a mixed liquid sample is stirred by the magnetic stirrer, an iodine solution and a sodium thiosulfate solution are extracted by a plunger pump, and the iodine absorption value of the carbon black is measured. In the extraction process, carbon black in the iodine solution is filtered through the filter pipe, filtrate is added into the reaction tank and chemically reacts with the sodium thiosulfate, and the iodine ion electrode in the reaction tank can judge the end point of the reaction by detecting the electron exchange capacity of the iodine solution and the sodium thiosulfate in the reaction tank when the iodine solution and the sodium thiosulfate are subjected to oxidation-reduction reaction. And meanwhile, the measured current data is transmitted to a microcomputer for automatic processing, so that accurate carbon black iodine absorption value data is obtained. The problems that manual operation is low in efficiency and the precision is greatly influenced by human factors are solved, and the advantages of high efficiency and high precision are achieved.

The protection of the secondary battery is performed without the secondary battery losing the capacity that it originally has, and the unnecessary power consumption of the secondary battery is suppressed at the time of output short circuit and at the time of storage. A voltage conversion circuit that converts the voltage of the secondary battery into a backup voltage required for a semiconductor memory is provided, a voltage monitoring circuit that monitors the output voltage is provided on the output side of the voltage conversion circuit, and in the case where the result of the voltage monitoring is a state of short circuit or a state close to short circuit, the operation of the voltage conversion circuit is stopped.

The utility model relates to the field of microcomputer temperature and humidity detectors, in particular to a handheld structure of a microcomputer temperature and humidity detector. Comprising a detector, a button, a protective cover and a connecting assembly, wherein the detector is formed by combining a built-in chip and an external display screen, a handheld column fixedly connected to the bottom end of the shell and a sensor mounted at the top end of the shell and connected with the chip; a button connected with a chip in the shell is installed on the handheld column, a protective cover is arranged on the front side of the button, and a connecting assembly is installed on the protective cover and the handheld column. According to the utility model, the conventional microcomputer temperature and humidity detector is improved, the protective cover is additionally arranged on the front side of the button, and the button is limited, so that the button is protected, the phenomenon that the button is mistakenly touched when the handheld microcomputer temperature and humidity detector is carried and moved is avoided, and meanwhile, the protective cover is fixed on the detector through the connecting assembly.

The invention discloses a busbar differential protection test workbench, which relates to the technical field of test devices and specifically comprises a base plate and an upper cover plate, a microcomputer protection tester is placed in the upper cover plate, and a scissor type lifting mechanism is arranged between the base plate and the upper cover plate. The base plate and the upper cover plate can be separated for expansion or close for storage under adjustment of the scissor type lifting mechanism, side baffles are arranged outside the two sides of the base plate and the two sides of the upper cover plate, and semi-open sliding grooves are formed in the side baffles. According to the multifunctional detection platform, in the using process, flexible expansion and automatic limiting can be carried out through the arranged base plate, the upper cover plate, the first supporting rod, the second supporting rod and other structures, the detection supporting requirement is met, in the transferring process, the multifunctional detection platform can carry out storage adjustment of maximum limiting, and the practicability is high. And the occupied area is reduced, and meanwhile the flexibility in the transferring process can be fully improved.

The utility model discloses a kind of multi-posture lower limbs exoskeleton rehabilitation training devices, including bed-chair conversion mechanism, double scissor lifting mechanism, hip plate support mechanism, flexible lower limbs exoskeleton mechanism and power device.Bed-chair conversion mechanism is matched with tripod through electric push rod, realizes the conversion of lying, sitting posture and standing posture;Double scissor lifting mechanism adopts scissor structure and electric push rod to realize lifting, bottom is equipped with trundle;Hip plate support mechanism is matched with support rod by spring shaft, provides stable support under different postures;Flexible lower limbs exoskeleton mechanism includes hip joint and knee joint structure, hip joint is driven in parallel by Bowden cable and spring, knee joint is driven by electric push rod.The device is also provided with control handle, integrated rocker, OLED display, voice control and STM32 single-chip microcomputer, to facilitate patient flexible control.The utility model can realize the switching of multiple rehabilitation postures, improve rehabilitation training effect.

The utility model discloses a motorcycle handlebar automatic steering experiment device, which comprises an air compressor, an air source processor, a microcomputer processor and an electromagnetic valve, the input end of the air source processor is connected with the air compressor, the output end of the air source processor is connected with the electromagnetic valve, the electromagnetic valve is connected with a moving mechanism, and the microcomputer processor is electrically connected with the electromagnetic valve. The motorcycle handlebar is driven to steer through the moving mechanism, an operator does not need to steer manually, the labor intensity of the operator is reduced, and the physical and psychological health of the operator is facilitated.

To provide an internal combustion engine control device capable of improving injection accuracy of a fuel injection valve.SOLUTION: The engine control device 150 includes the drive circuit 157 that switches between the energized state and the non-energized state of the solenoid coil 13b that opens and closes the injector 13, and the microcomputer 152, the electric signal indicating that the application voltage applied to the solenoid coil 153a has reached the timing of executing the interruption processing is input to input port 13b, and the microcomputer 152 derives the valve-opening response delay length with respect to the valve-opening command based on the electric signal input to input port 153a while the valve-opening command for opening the injector 13 is being outputted to the drive circuit 157. The valve-opening response delay length is a length of time from when the microcomputer 152 outputs the valve-opening command to when the application voltage reaches a predetermined value while increasing, and the application voltage is detected based on the current supplied to the solenoid coil 13b.SELECTED DRAWING: Figure 6

In this invention, a device has been designed to accurately measure the circumference and weight of a radial tire bead. The goal of this innovation is to increase the accuracy, speed, and efficiency of the quality control process for tires produced in the country's tire manufacturing industry. The main problem with traditional methods, which are performed using templates and traditional scales, is low accuracy, operator dependency, and high error rates. The device is designed using digital image processing technology, which includes a Raspberry Pi camera and the SimpleBlobDetector algorithm in the OpenCV library, to calculate the diameter of the bead with an error of less than 1%. Also, using four load cell sensors equipped with the HX711 module, the weight of the bead is measured with high accuracy (error of 0.35% to 3.18%). The data is processed by the Raspberry Pi minicomputer and the results are displayed instantly on the LCD touch screen. This integrated system increases production efficiency by automating the measurement process and using cost-effective components, making it ideal for tire production lines and quality control laboratories.

The utility model relates to the field of microcomputer protection, and discloses a microcomputer protection device convenient to install, which comprises an installation plate installed on the surface of a wall, the lower surface of the installation plate is fixedly connected with a supporting plate, the upper surface of the supporting plate is slidably provided with a moving plate, and the upper surface of the moving plate is provided with a shell. A fixing assembly is arranged on the outer wall of the supporting plate, an unlocking assembly is arranged on the outer wall of the supporting plate, protruding blocks are arranged at the positions, close to the front end, of the left end and the right end of the movable plate, the left end and the right end of the movable plate are each rotationally connected with a set of sliding blocks, a sliding groove is formed in the inner wall of the supporting plate, and the sliding blocks slide on the inner wall of the sliding groove. The protruding blocks are inserted into the inner walls of the sliding grooves. According to the utility model, the shell is supported by using the moving plate, when a new line needs to be installed, the moving plate can be pulled firstly to enable the convex block of the moving plate to be separated from the sliding groove, and when the sliding block moves to the movable foremost end, the moving plate can be rotated to be in a vertical state.

The present application belongs to the field of analytical detection technology, and particularly relates to a water quality detection circuit and a water quality analyzer. The water quality detection circuit is used for detecting chlorophyll in water quality, and comprises: a single-chip microcomputer; a light source control circuit unit, comprising a light source constant current driving circuit module and a light source, and the light source constant current driving circuit module is used for driving the light source; a light source feedback circuit unit, used for feeding back intensity variation of the light source to the single-chip microcomputer; the single-chip microcomputer adjusts a driving voltage of the light source according to the feedback of the intensity variation of the light source, so that the light intensity of the light source is in a target interval; and a fluorescence detection circuit unit, used for detecting fluorescence generated after the light source irradiates a sample to be detected and performing ambient light compensation, so as to obtain a chlorophyll concentration. The present application detects and compensates the light source, maintains the light intensity of the light source unchanged, makes the fluorescence excited by the chlorophyll more stable, additionally, compensates ambient light such as sunlight and lamp light, avoids interference of external light sources, and effectively improves the precision of chlorophyll detection.