290results about How to "Eliminate blind spots" patented technology

The invention discloses an underground moving target optical fingerprint positioning and tracking method based on visible light communication and belongs to an underground moving target positioning and tracking method for a coal mine. The method comprises the following steps: establishing an optical fingerprint database in an offline stage, and positioning and tracking a target in a fingerprint matching mode in an online stage; detecting a signal of an illuminating lamp base station through the carried receiver in the moving process of the moving target, and transmitting the calculated information to the illuminating lamp base station; receiving the user information through the illuminating lamp base station, calculating the direction information of the user signal, which is relative to the base station, and assembling the arrival angle information, the ID of the base station, the light signal intensity transmitted by the moving target, and the target ID into a positioning data packet which is transmitted to a positioning server; and calculating the position of the target through the positioning server. The moving direction of the target is tracked in real time through the illuminating lamp base station by utilizing the blind adaptive multi-light source detecting algorithm based on the receiving intensity, the accurate position of the target is obtained, and positioning tracking is realized. The method has the advantage that the position of the target can be accurately and effectively estimated.

The present invention provides the in-situ detection of product quality index in Chinese medicine production process and relates to one Chinese medicine producing shop, where relevant technological parameters and quality indexex are in-situ detected directly. The shop is equipped with in-situ detection system, which needs no any sample from the technological process. The system is equipped with one near infrared spectrometer and one industrial control comdputer and its in-situ real-time analysis system adopting least-square method and neural network method can be used in predicting the quality indexes in the production and providing analysis data. The method may be used in different Chinese medicine production shops.

The invention provides a GPS navigation system capable of automatically updating a map. The system comprises an electronic map data base, a navigation module, a road net data updating generation module, and a data comparison module, wherein the electronic map data base is used for storing the road net data of the electronic map of the system; the navigation module is used for finding out the navigation data guiding a navigation object to reach the set destination from the electronic map data base according to the current position information of the navigation object; the road net data updating generation module is used for recording the dynamic track of the moving navigation object according to the positioning information of the navigation object and taking the dynamic track as the current road net data; and the data comparison module is used for comparing the current road net data with the road net data of the electronic map in the electronic map data base and generating a data comparison result; and if the two groups of road net data are different, the currently updated road net data is stored in the electronic map data base so as to add the road net data information of the electronic map into the electronic map data base. When the navigation object moves, the system and the method can realize the automatic updating of the road net data of the electronic map and make the map show the actual road conditions more thoroughly, accurately and in detail so as to find out the best navigation route.

The invention relates to an infrared touch screen, wherein on at least on detection direction, an infrared emitter and two infrared receivers are deflected toward the center of a touch screen to inverse the directions of the infrared emitter and the infrared receivers to form crossed relation. The invention further provides a multipoint touch positioning method of the infrared touch screen, which comprises (a), respectively initializing the infrared receiver vertical with the infrared emitter and the infrared receiver inclined and opposite with the infrared emitter, (b), vertically scanning and detecting, comparing with vertical initialized value, (c), calculating the possible position coordinate of each touch point, (d), processing inclined scanning detection to be compared with inclined initialized value, (e), determining the relation expression between the real coordinates X, Y of the touch point, checking the possible coordinates calculated in the step (c) in the relation expression, and determining the position coordinate of each touch point. The invention has simple structure and low cost, which can realize accuracy multipoint touch positioning.

The invention discloses a digital passive infrared static human body detector which comprises an outer shell, a microcontroller and a PIR sensor and is characterized in that a Fresnel lens is arranged at the front end of the PIR sensor, a matched reflector is installed between the PIR sensor and the Fresnel lens, and the microcontroller is connected with a power source module, a drive motor and a detection switch. A detection method includes: a, background noise is learned, and a background noise sequence is formed; b, dynamic human body detection is carried out; c, delayed output is carried out; d, static detection is judged whether to be carried out or not; e, detection signals are acquired, and a detection signal sequence is formed; f, the digital mutual correlation calculation is carried out; and g, a static human body is judged whether to exist or not. According to the detector and the method, false assumption of a prior passive static human body detector and the defect that the human body under the static state can not be detected are abandoned and avoided, and the human body under the static state in a detection area can be effectively and accurately detected so that the static detection is achieved.

The invention relates to a method for the on-line self-calibration of external parameters of cameras of a bionic landing system of an unmanned gyroplane. The method can solve the problem of a blind zone of stereoscopic vision in a descending process of a gyroplane and improve the landing precision of the unmanned gyroplane. The actual operating steps comprise: (1) calibration of internal parameters; (2) calibration of external parameters; and (3) on-line self-calibration of the external parameters. The method can realize the on-line self-calibration of the external parameters of double cameras carried in the unmanned gyroplane, obtain optical axis included angle information and height information of the cameras in real time, and effectively solve the problem of the blind zone of binocular stereoscopic vision, so that the automatic landing of the unmanned gyroplane is ensured, and the security of the system is improved.

The invention discloses a video monitoring intelligent early-warning system and a video monitoring intelligent early-warning method on the basis of target space relation constraint. The system comprises a video acquisition module, a target component intelligent analysis functional module, a video content visual analysis module, a general behavior rule sample database and an alarm module. On the basis of behavior comprehension on target components, aiming at spatial correlation between targets, the system carries out behavior characteristic analysis, evolution and classification, establishes a spatial correlation mode sample library, implements detection and identification on abnormal behaviors, can more effectively and accurately carry out identification and judgment on emergencies and can lock an abnormity trigger point to provide evidence for post-mordem forensics. The system introduces target space relation constraint, divides a video scene region to complete defining related concepts of the target components of a video, eliminates a certain fuzziness and faults in space semantic information, solves the problems of incompletion and inaccuracy in video content analysis and is more accurate and more efficient to detect abnormal events in a video monitoring range.

The invention relates to a method for field fixed point zero-dead-zone autonomous soft landing of a subminiature unmanned rotor aircraft. According to the method, a landing system is started and switched, a landing area is searched, an attitude sensor measures attitude positions of a small unmanned aircraft, and a visual sensor collects target information of a camera; the attitude position information and the target information undergo operation processing according to a set input relationship of eyeball compound motion after being subjected to corresponding A / D conversion and digital filtering, then, the relative deviation between a tracking object and the optical axis of the camera can be obtained, and corresponding scale conversion is carried out; the processed information serves as a control law of an airborne platform controller and respectively controls airborne platform motors, and therefore properties of the eyeball compound motion can be achieved. By means of the method, an airborne platform can be adjusted in real time and autonomous tracking on suspicious motion targets by the unmanned aircraft at a jolting environment can be achieved according to the position information of the tracked motion targets and the attitude information of the unmanned aircraft, and a certain stabilizing effect on tracking images can be achieved.

The invention relates to a method for reducing a fade zone by a twin camera monitoring system on a movement platform. When the movement platform loaded with the twin cameras generates the relative position changes with a target area, the method controls the angle and direction of the twin cameras based on the principle of the heterodromous motion of human eyeballs to cause that the target area is always in the public field of view of the twin cameras, thus obtaining the three dimensional depth information of the target area. In the method, after a sensor measures the movement parameters of the movement platform, A / D conversion, digital filtering, calibration conversion, and controlling operation are carried out on the parameters by a camera control unit, and then when a motor of a camera holder compensates the movement of the platform, the angle and direction needing to be rotated is obtained. A control signal drives the rotation of the motor of the camera holder on the movement platform by a serial port. By using the method for simple operation, the motor of the camera holder can be controlled to rotate according to a corresponding direction in a certain speed and the blind zone caused by the movement of the system loading with the camera platform is eliminated.

The invention relates to a pair of glasses for automobile driving. Cameras are installed at the roof of an automobile in all the directions, image signals are sent to a processor, a driver head posture detector is arranged in the automobile, a sensor and a miniature camera are arranged on the glasses, information is also transmitted to the processor, the processor judges the visual angle and the direction needed by a driver and processes visual angle images, and processed results are sent to the glasses, and the images are projected to the eyes of the driver through a projector located on the glasses. According to requirements of the driver, the wide-range visual angle and visual field can be provided, and even observation can be performed outside an automobile body, so that driving safety is improved, and an automobile dead zone is eliminated; conditions are provided for the improvement of the structure, the appearance and safety of the automobile, for example, the automobile and ambient conditions can be overlooked in the air, and the obtained images are as clear as pictures of an automobile game.

An infrared touch device consists of driving circuit, signal processing circuit, infrared emitting element, infrared receiving element and detection region. It features that there are infrared emitting element and also infrared receiving element on at least two side edges at periphery of detection region, infrared ray emitted by each infrared element is always received by multiple infrared receiving units.

The invention relates to a vehicle side rear view mirror intelligent regulation control system and a vehicle side rear view mirror intelligent regulation control method. The vehicle side rear view mirror intelligent regulation control system comprises a central processing unit as well as an in-vehicle camera, a vehicle weighing sensor, a steering wheel corner sensor, a reverse gear sensor and a first driving circuit and a second driving circuit, which are connected with the central processing unit; the first driving circuit is connected with an upper motor and a lower motor of the vehicle side rear view mirror; the second driving circuit is connected with a left motor and a right motor of the vehicle side rear view mirror; and the in-vehicle camera is mounted in front of a driver's seat or mounted obliquely in front of the driver's seat. The control method is as follows: the angle of the vehicle side rear view mirror is timely regulated according to the space position change of the driver and the change of vehicle traveling state, as a result, the vehicle side rear view mirror is regulated to the optimal angle, blind zones and dead angles are eliminated, the driver always keeps the optimal driving view, and comfort and safety of the vehicle driving are improved.

Disclosed are an apparatus and a method for wet-processing (such as cleaning and etching) an object such as a semiconductor wafer or substrate, and a fluid diffusion plate and a barrel used therein. The wet-processing apparatus according to the invention comprises: a treatment bath that contains and treats objects; a plurality of object support pipes that are installed inside the treatment bath and able to rotate, wherein plural slots are formed on the surface of the support pipes and support the object by allowing the object to be vertically positioned at the bottom surface of the treatment bath; and a rotation unit that is connected to and rotates the support pipes to rotate the object in a circumferential direction. The support pipe comprises: a treatment fluid spray hole for spraying the treatment fluid on the object; and a treatment fluid flow path for supplying the treatment fluid to the spray hole. The invention removes a dead zone inside the treatment bath and enables the uniform and smooth flow of the treatment fluid. Therefore, treatment efficiency and uniformity can be improved.

The invention discloses an intelligent ground protection method and system for a neutral point of a power distribution network. When a power grid runs normally, the neutral point is not grounded in a system. When single phase grounding of a line in the power grid occurs, the system enables neutral point grounding according to the failure property and handles the failure. After the failure is solved, the neutral point is not grounded again in the system. According to the invention, advantages of three regular grounding methods including neutral point no-grounding, small resistor grounding and arc suppression coil grounding are kept and shortcomings of said three grounding methods are avoided, so that grounding failure diversity is allowed and smart protection is provided for different kinds of grounding failures in one-to-one correspondence. Especially, a blind area in high resistance grounding failure in the three grounding methods is eliminated and high resistance grounding failure can be judged accurately and preventive protection is provided, so that developing failure is prevented and a technical problem that protection cannot be provided for high resistance grounding failure in the regular grounding methods is solved. The invention has great significance in power supply safety and reliability of the power distribution system.

The invention discloses an automobile rearview mirror without a blind area. The automobile rearview mirror comprises protective covers, curved optical mirrors arranged in the protective cover, and a mirror regulating device driving the curved optical mirrors to rotate. The curved optical mirrors comprise a first mirror and a second mirror in hinge connection, the protective covers comprises a fixed cover and a movable cover matched with the fixed cover, the first mirror and the second mirror are arranged in the fixed cover and the movable cover respectively, the second mirror is connected with the movable cover, and the mirror regulating device is connected with the first mirror and the second mirror. The two curved optical mirrors are respectively controlled to rotate at different angles through the mirror regulating device so that an ideal automobile driving view angle can be obtained. Besides a basic view angle of an ordinary rearview mirror, an expanded outer side view angle of an automobile can also be obtained, so that the blind area is eliminated, and driving safety is improved. Meanwhile, the protective covers can provide real-time protection for the mirrors, and therefore, dust-prevention and rain-proof effects are achieved.

The invention discloses a multifunctional driving monitoring early warning system based on a mobile terminal. According to the multifunctional driving monitoring early warning system, data are collected through four wide-angle cameras arranged on a front grating, a left side door mirror, a right side door mirror and a tail door of a vehicle respectively; then, the data are synthesized to form a complete image through the image processing technology; meanwhile, after electronic power-assisted steering data in an ECU of a vehicle and related working condition information of other vehicles are collected through an OBD2 port data collector which is connected to the ECU of the vehicle and comprises a main chip, namely, an eml327 chip, a 2.4 G module and other related circuits, the data are transmitted to a controller through the 2.4 G wireless technology; advancing trajectory prediction of the vehicle is calculated according to other data, including the axle base, the wheel tread and the like, of the vehicle; finally, the image where trajectory prediction is conducted is outputted to the mobile terminal device such as a mobile phone in a wireless mode, and the data are displayed through the mobile terminal device. According to the multifunctional driving monitoring early warning system, real-time image transmission and detection are achieved through a wireless communication method at a low cost.

The invention relates to a strong loop quick cooling chamber, comprising a wind cooling chamber which is composed by a outer shell, a feed port and a discharge port are arranged on the both ends of the wind cooling chamber, a horizontal production line is arranged between the feed port and the discharge port, a plurality of upcast ventilation pipes and downcast ventilation pipes are arranged inside the wind cooling chamber. The upcast ventilation pipes and downcast ventilation pipes are separately arranged at the upper side and the lower side of the horizontal production line, a plurality of top nozzles which can jet air down are arranged on the upcast ventilation pipes, a plurality of lower nozzles which can jet air up are arranged on the downcast ventilation pipes, a gas circulator is arranged in the wind cooling chamber, an air inlet opening of the gas circulator is communicated with the wind cooling chamber, an air outlet opening of the gas circulator is communicated with the interior of the upcast ventilation pipes and downcast ventilation pipes, a built-in heat exchanger is arranged at the air inlet opening of the gas circulator. By arranging ventilation pipes on the upward side and lower side of the horizontal production line, strong convection can be formed by the cold air which is jeted from the nozzles of the upcast ventilation pipes and the downcast ventilation pipes and the heat on the devices can be quickly removed.

The invention discloses a distributed type earthquake early warning cloud monitoring network system and method and relates to the field of earthquake early warning. The distributed type earthquake early warning cloud monitoring network system and method solve the problems that a traditional P-wave and S-wave early warning mode is high in cost, short in early warning time and not applicable to wide domestic consumers. The system is composed of an earthquake early warning network server, a household portable monitoring terminal and a public fixed type monitoring terminal. According to the method, all the terminals in the network are utilized for monitoring P waves, S waves and geographic positions generated after an earthquake happens in real time, the earthquake waves and the geographic position information are uploaded to the earthquake early warning network server in real time through wired and wireless networks, and therefore an earthquake wave dynamic real-time spreading figure based on a geographic information system is built. The distributed type earthquake early warning cloud monitoring network system and method have the advantages that the epicenter area range and the earthquake magnitude are determined, a large number of points are distributed in the network densely, a dead zone can be eliminated effectively, and the earthquake early warning time is prolonged effectively.

An on-board system and method for real time measurement of relative velocity and distance of separation between a subject vehicle and objects in its surroundings is disclosed. The present invention provides a system comprising a plurality of sensors that serve to detect, determine positions, measure the distances and relative velocities of objects around a subject vehicle and issue warnings to the driver about impending collisions and the path to be taken during different maneuvers.

A rapid treatment system for a soft soil foundation comprises a plurality of drainage plates vertically inserted into a soft soil stratum; the drainage plates are connected with a drainage pipe through hand-shaped joints; the drainage pipe is connected into a gas-liquid dispersion tank; a self-controlled drainage pump is arranged in the tank; above the tank, a vacuum-pumping pipeline system is connected with a high-vacuum pump; pressurization pipes are arranged in the soft soil stratum between the drainage plates; and the pressurization pipes are connected with a booster pump. According to the technology and a method adopted by the invention, adverse effects of well resistance and a smearing effect on drainage consolidation can be obviously reduced, blocking of a drainage channel is reduced, a dead zone of a traditional vacuum preloading drainage channel can be eliminated, dependence on sand resources in the traditional technology can be eliminated, vacuum-pumping time is shortened and vacuum-pumping units are reduced, and 100 percent of operation rate is realized; moreover, the drain pipe is recovered, so that power consumption is reduced, engineering cost is reduced, and the construction period is shortened.

The invention discloses a coaxial lighting AOI light source device. The device comprises a coaxial light fixed plate, a diffusion plate, a semi-permeable mirror, four groups of LED lamp panels, an upper cover, a middle cover and a lower cover, wherein the four groups of the LED lamp panels are a first group of the LED lamp panels, a second group of the LED lamp panels, a third group of the LED lamp panels and a fourth group of the LED lamp panels respectively from top to bottom in turn; the diffusion plate, the semi-permeable mirror and the first group of the LED lamp panels are respectively arranged on the coaxial light fixed plate; the semi-permeable mirror has an inclined mirror body; the first group of the LED lamp panels are positioned on one side of the semi-permeable mirror; the diffusion plate is arranged between the semi-permeable mirror and the first group of the LED lamp panels for separating; distance between the diffusion plate and the semi-permeable mirror forms an epi-illumination area; the second, the third and the fourth groups of the LED lamp panels are respectively arranged on the upper, the middle and the lower covers respectively; and the upper, the middle and the lower covers are arranged below the epi-illumination area sequentially from the top to the bottom. The coaxial lighting AOI light source device has the advantages of providing an all-angle lighting environment, and better displaying image characteristics in an AOI detection field, along with rational structure.

The present invention provides a path planning system and method for a vehicle model. The system comprises: a map generating unit for generating a grid map available for path planning; a sensing unitfor sensing and detecting obstacle information around the vehicle model; a fusion positioning unit for positioning the vehicle model; a global path generating unit for generating a global path from aninitial point to a target point and consisting of a series of path points which can be integrated together to form a path; a local path following unit for tracking the global path and outputting thespeed parameter corrected value of the vehicle model, wherein the speed parameter at least includes the front wheel declination angle, driving linear velocity, and acceleration of the vehicle model; and a vehicle model motion control unit for controlling the motion of the vehicle model by using the output speed parameter corrected value as an input.

The invention discloses a data processing method and device. The method comprises the steps: obtaining original data; carrying out the filtering of the original data, so as to obtain tendency data, wherein the tendency data is used for representing the tendency of a signal of original data; carrying out the dividing of the tendency data, so as to obtain a training data set; training a plurality ofmachine learning models through the training data set, wherein each machine learning model is used for predicting the tendency of the signal; and determining a combined prediction model based on theplurality of trained machine learning models the training data set. The method can achieve the processing of original data, and obtain the meaningful data information.

An adaptive surrounding view monitoring apparatus and a method thereof are disclosed, in which the apparatus uses a steerable camera set to take horizontal images while sending the horizontal images to a control unit where they are combined into an image of 180-degree or 360-degree surrounding view. It is noted that the surrounding view image maybe an image of front surrounding view, an image of rear surrounding view or an image of ambient surrounding view relating to a vehicle, and using that, visual blind spot of a driver driving the vehicle can be eliminated and the field of vision is widened, and thereby, the probability of accident occurring is reduced.

The invention provides an automobile pillar A display system which comprises a blind area camera, a display screen, an image processing and display output unit, and a control unit, wherein the blind area camera is arranged in a position close to a front windshield inside an automobile and is connected with the image processing and display output unit; the image processing and display output unit is arranged close to the console inside the automobile and is connected with the display screen; the control unit is arranged close to the console inside the automobile and is connected with the blindarea camera; the display screen is arranged on the inner surface inside an automobile pillar A; the area of the display screen is not greater than that of the inner surface of the pillar A; the imageprocessing and display output unit is used for outputting images acquired by using the blind area camera to the display screen. The automobile pillar A display system can be adaptive to different running states of the automobile, different adaptive images can be displayed on the pillar A, and thus relatively high driving security can be achieved; the units are compactly arranged inside the automobile, the response speed and the precision of the system can be improved, and the driving comfort can be improved.

The invention discloses an elevator door safety protection device. The elevator door safety protection device comprises an elevator car door, a drive mechanism, a first transmission mechanism and a controller. The elevator car door is provided with a transmitter and a receiver. The elevator door safety protection device further comprises a second transmission mechanism connected with the drive mechanism. The transmitter and the receiver are in sliding connection with the elevator car door. The elevator car door is provided with sliding grooves. The transmitter and the receiver are in sliding connection with the sliding grooves through sliding blocks. The moving distance of the sliding grooves in the length direction of the elevator car door is larger than or equal to the distance between adjacent infrared transmitting pipes in the transmitter. Moving of the elevator car door, the transmitting end and the receiving end can be achieved only by using one drive mechanism, and a power source is saved; the sliding grooves are arranged in a sine curve manner, the sliding blocks can drive the transmitting end and the receiving end to move in the moving direction of the elevator car door and the length direction of the elevator car door, and the purpose of blind area eliminating is achieved; and a transparency detection sensor can detect transparent obstacles, the problem that infrared rays cannot detect the transparent obstacles is solved, and the elevator safety is improved.

A surveillance method monitors a monitored area using a monitoring station. The monitoring station in electronic communication with an actuator, an image capture device, and a plurality of motion sensors. The presence of motion in the monitored area is detected in real-time using the motion sensors. When the motion is detected, a target region in the monitored area where the motion is detected is determined, and a control signal is sent to the actuator according to the target region to control the image capture device to aim at the target region using the actuator. Real-time images of the target region are captured, and stored in a storage system of the monitoring station.

The invention belongs to the field of laser machining, and provides a three-dimensional laser marking method and device and three-dimensional laser machining equipment. The method includes the steps that a curved surface model of an object to be machined is obtained, and the object to be machined is installed on a numerical control rotary worktable; a specific two-dimensional planar texture is mapped to the curved surface model to obtain a mapped curved surface model; a three-dimensional texture mathematic model is obtained after the curved surface model is extracted from the mapped curved surface model; the three-dimensional texture mathematic model is segmented to obtain multiple texture model blocks; the numerical control rotary worktable and the texture model blocks are controlled to rotate by the same angle in the same direction, so that the texture model blocks are sequentially located in a laser machining area of a three-dimensional galvanometer system, and curved surfaces, matched with the texture model blocks, in the laser machining area are sequentially machined. By means of the three-dimensional laser marking method and device and the three-dimensional laser machining equipment, the aim that the curved surfaces in areas of any angle can be machined through lasers can be achieved.

The invention provides an earthquake cloud monitoring and early-warning network system based on mobile phones and belongs to the field of earthquake monitoring and early warning. The earthquake cloud monitoring and early-warning network system is composed of an earthquake early-warning network server, monitoring mobile phone user terminals and ordinary mobile phone user terminals. By the utilization of the random dense-distributed measuring nodes of the earthquake monitoring and early-warning network constituted by multiple monitoring mobile phone user terminals, data that location, shaking and the terrestrial magnetism continuously changes along with time is transmitted by the multiple monitoring mobile phone user terminals and received by the earthquake early-warning network server so that whether an earthquake takes place can be comprehensively analyzed and judged. When an earthquake is judged by the earthquake early-warning network server, earthquake early-warning information are transmitted to each monitoring mobile phone user terminal and each ordinary mobile phone user terminal accessed to the system. The earthquake cloud monitoring and early-warning network is constituted by utilization of the wide distribution of mobile users, greatly reduces the construction cost, effectively eliminates dead zones, assists professional seismic stations to complete the earthquake early-warning works, and improves the early-warning accuracy and time.

The invention discloses a divergent cold light source vertical microalgae culture photoreactor and belongs to the field of biotechnology. The invention adopts a technical scheme that: the divergent cold light source vertical microalgae culture photoreactor comprises a photobioreactor (1), a divergent cold light source (2), a reflecting material (3) and other parts, and is characterized in that: the photobioreactor (1) is an ellipsoidal container made of a transparent material, the bottom of the photobioreactor (1) is in a circular arc shape, and the photobioreactor (1) is used for culturing microalgae; the divergent cold light source (2) is a power-driven electric storage light source, can emit light around uniformly, and after being placed in the photobioreactor (1), performs irregular motion due to constant impact on the wall of the reactor in a motion process or moves along a preset track under the control of an internal program in the light source; and the reflecting material (3) is paved at the bottom of the photobioreactor (1), a new light source can be formed after reflection, and thus, the utilization rate of light is increased. The photobioreactor adopts a spherical light source capable of emitting light around, the light source can move to any part in the reactor to make sure the light intensity and illumination time in the reactor are consistent and eliminate dead corners of illumination; the motion of the spherical light source in the reactor realizes the stirring of microalgae culture water, ensures the culture solution and bacterial distribution in the reactor is uniform, contributes to the balanced absorption of nutrients by the microalgae, reduces wall growth of cells and greatly improves the efficiency of microalgae culture; and the bottom of the reactor is covered with the reflective material, the utilization rate of light is improved, and the energy consumption is lowered.