312results about How to "Reduce drift" patented technology

The invention discloses a hilly slope irrigation control system based on artificial intelligence, and the system comprises a wind speed and wind direction detection module which is used for obtaining wind speed and wind direction data; the sprinkler head adjusting module is used for adjusting the angle and the spraying distance of a sprinkler head based on the wind speed and wind direction data; the soil humidity detection module is used for being connected with a soil humidity sensor and determining irrigation requirements according to data of the soil humidity sensor; the artificial intelligence control module is used for optimizing the irrigation time and the irrigation amount through an artificial intelligence algorithm; the sprinkling irrigation system control module is used for controlling the sprinkling irrigation system to irrigate according to the optimization result; the hilly slope irrigation control system based on artificial intelligence reduces the phenomenon of non-uniform growth of crops, facilitates healthy and uniform growth of the crops, and ensures that the crops can obtain a proper amount of water supply, so that normal growth and development of the crops are promoted, the yield and quality of the crops are improved, and the agricultural production benefits are further improved.

The invention relates to the technical field of digital printing machines, in particular to an intelligent ink droplet control method and system of a digital printing machine and the digital printing machine. The method comprises the steps of real-time data acquisition, multi-dimensional parameter modeling, real-time ink droplet behavior prediction, self-adaptive ink jet parameter adjustment, closed-loop feedback control, medium characteristic self-adaptive matching, intelligent multi-region optimization and environmental factor compensation. Ink droplet behaviors and environmental data are collected in real time through a high-speed camera and various sensors, a nonlinear model is constructed by using a deep learning technology, and a dynamic parameter optimization curve is generated. According to the method, the printing quality and efficiency are remarkably improved, and the method is suitable for various media and complex scenes.

The invention discloses a smart watch motion data real-time synchronous transmission system, relates to the technical field of data transmission, and solves the problems of data delay accumulation, signal packet loss, sensor data drift and the like through cooperation of a delay evaluation module, a data retransmission management module and a data calibration module. The delay evaluation module records the start time Tsta and the end time Tend of each transmission in real time, calculates an accumulation delay coefficient Llx and compares the accumulation delay coefficient Llx with a delay threshold value Lq so as to trigger a delay alarm; the data retransmission management module detects the packet loss number Dbz through a packet loss statistical calculation unit, and adaptively adjusts a retransmission strategy in combination with a retransmission evaluation unit to ensure the transmission integrity; the data calibration module calculates a sensor drift coefficient Spxs according to a temperature fluctuation factor Te, a noise interference factor En and a historical offset factor Ho, compares the sensor drift coefficient Spxs with a threshold drift Q, automatically adjusts reference parameters of the sensor, and ensures data precision and system stability.

The invention discloses energy-saving high-pressure cleaning equipment for square and rectangular pipes, and relates to the technical field of high-pressure cleaning, the energy-saving high-pressure cleaning equipment comprises a main body frame, a cleaning module is mounted above the main body frame, a rotational flow collaborative cleaning mechanism is arranged in the cleaning module, and the rotational flow collaborative cleaning mechanism is used for changing a water flow mode to ensure internal and external water flow collaborative high-pressure cleaning; the introduced air conveying bin only surrounds the outmost periphery of the nozzle, air flow flows along spiral water flow on the outmost periphery of the nozzle after being discharged in a vertical flowing mode, through the design, the peripheral water flow obtains additional momentum under the action of wind power, and then the momentum is transmitted to the internal water flow through collision among fluid molecules; according to the process, redistribution of energy is achieved, energy of internal water flow is supplemented, and water flow impact force borne by the peripheral square and rectangular pipes and the internal square and rectangular pipes is more balanced through the effect of wind power on the peripheral water flow and transmission of the energy to the internal water flow.

The invention discloses a numerical analysis method for predicting speed distribution of downwash airflow of an unmanned aerial vehicle in a rice canopy based on a fluid-solid coupling method. The numerical analysis method comprises the following steps: measuring physical parameters of rice plants based on physiological characteristics of rice; establishing a three-dimensional rice plant model based on three-dimensional geometric modeling software; dividing a three-dimensional rice plant canopy grid based on grid division software; establishing a fluid-solid coupling model of the lower washing flow field of the unmanned aerial vehicle and the rice canopy; setting an initial boundary condition and performing spatial discretization; full-coupling finite element numerical simulation of the fluid-solid coupling model is carried out; performing post-processing on the numerical simulation result based on flow field post-processing software to obtain an evolution process and spatial distribution of the downward washing flow field of the unmanned aerial vehicle and dynamic behaviors of rice plants; and analyzing the influence of the dynamic behavior of the rice plant on the downwash airflow of the unmanned aerial vehicle, and determining the distribution rule of the downwash airflow speed in the rice canopy. The problems of high time consumption, influence of external conditions, difficulty in copying, limitation and the like are effectively solved.

The invention discloses a micro-channel jet reactor. The micro-channel jet reactor comprises a sample introduction unit, a main mixing unit and a reaction unit which are sequentially communicated, the main mixing unit comprises a first inner pipe and a first outer pipe arranged outside the first inner pipe in a sleeving manner; a first annular space is formed between the first inner pipe and the first outer pipe; the sample introduction unit is communicated with the first inner pipe; a second sample inlet is formed in the first annular space, and a plurality of through holes are formed in the first inner pipe; the reaction unit comprises a second inner pipe and a second outer pipe arranged outside the second inner pipe in a sleeving manner; a second annular space is formed between the second inner pipe and the second outer pipe; the first inner pipe is communicated with the second inner pipe; during use, condensate is arranged in the second annular space. The reactor can effectively improve the mixing uniformity degree of reaction liquid, meanwhile, the reaction temperature is controlled, and the reaction rate and selectivity are ensured.

The invention relates to the technical field of metal processing, and discloses a speed reducer gear and rotating shaft hot assembly device which comprises a fixing bottom plate, a transmission frame arranged at the top end of the fixing bottom plate and a clamping base, a fixing plate is installed at the top of the fixing bottom plate, the transmission frame and the clamping base are both installed at the top end of the fixing plate, and the clamping base is used for positioning and clamping a bearing. A pair of telescopic rods is installed at the top of the transmission frame, a limiting plate is installed at the top ends of the telescopic rods, an auxiliary positioning plate is arranged at the top end of the limiting plate, a clamping frame is arranged at the bottom of the limiting plate and used for limiting the reduction gear, a pair of sliding grooves are formed in the top end of the limiting plate, and the auxiliary positioning plate is movably clamped in the sliding grooves; the transmission wheel penetrates through the limiting plate; the clamping frame is mounted at the bottom of the transmission wheel; compared with the prior art, the overall assembly efficiency can be improved, and the situation that the temperature of the gear will be below the required temperature for expansion of the inner ring is reduced.

The invention discloses chip appearance detection equipment which comprises a marble carrying table, a chip carrier supply device, a chip visual detection device, a chip carrier output line and a chip carrier turnover device, wherein the chip carrier supply device, the chip visual detection device, the chip carrier output line and the chip carrier turnover device are arranged on the marble carrying table; the chip carrier supply device comprises a chip carrier bearing mechanism; the chip visual detection device comprises a detection bearing mechanism and an image acquisition mechanism, the detection bearing mechanism comprises a horizontal carrying table and a reset detection part, the image acquisition mechanism comprises an image carrying seat and a position degree monitoring sensor, and the image carrying seat is provided with a macro camera shooting end; the macro camera shooting end is connected with a correction module which is in communication connection with the location degree monitoring sensor; the chip carrier turnover device comprises a turnover mechanical arm. The micro-chip appearance micro-distance detection requirement is met, the detection image quality is ensured through correction of the relative position degree of the machine position and the platform, defect detection and recognition are accurate and comprehensive, the detection precision maintaining period is long, and frequent manual calibration is not needed. And automatic operation is efficient and smooth.

The utility model relates to the technical field of robot track cleaning, and discloses a track robot track cleaning device which comprises a robot track, a machine frame, first limiting idler wheels, second limiting idler wheels, a cleaning brush, a driving mechanism and a dust collection mechanism. The two second limiting rollers are attached to the inner side and the outer side of the inner side wall of the rack, a cleaning brush is rotationally connected into the rack, a driving mechanism used for driving the second limiting rollers and the cleaning brush to rotate is installed on the rack, and a dust suction mechanism facing the cleaning brush is installed on the rack. Dust accumulated on the track can be cleaned conveniently, and the influence of the dust on walking of the robot on the track is prevented.

The invention relates to the technical field of composite materials, in particular to a long glass fiber reinforced plastic preparation process autonomous regulation and control method based on image vision, which comprises the following steps: judging the color difference interval of glass fiber and a standard sample, and judging whether floating fiber exists in colloidal particles or not according to the color difference interval; judging whether the floating fiber condition is in a first floating fiber degree or a second floating fiber degree according to the floating fiber ratio; in the first fiber floating degree, judging that the fiber floating reason is insufficient and non-uniform impregnation according to the diameter difference between the material diameters; judging whether the equipment parameters are in a preset range, and adjusting the equipment parameters; in the second floating fiber degree, the deviation condition is judged according to the diameter difference value of the materials; and judging whether the offset degree is a first category or a second category according to the offset, analyzing the offset trend, and adjusting the proportion or traction force of the polypropylene resin. By performing image view analysis on the colloidal particles prepared from the long glass fiber reinforced plastic, the reason of fiber floating is judged, and the preparation process is correspondingly regulated and controlled.

The invention relates to the technical field of machine vision, in particular to an image segmentation method and system for liquid crystal screen display. The method comprises the following steps: acquiring basic data of the liquid crystal screen; performing screen response characteristic analysis according to the basic data of the liquid crystal screen to obtain screen response characteristic data; performing multi-scale image acquisition according to the basic data of the liquid crystal screen to generate multi-scale image data; performing characteristic classification on the liquid crystal display according to the screen response characteristic data, and performing edge compensation analysis on the multi-scale image data to obtain edge characteristic compensation data; acquiring real-time data of the touch screen; and performing touch interference identification analysis on the real-time data of the touch screen according to the edge feature compensation data to generate touch interference mask data. By analyzing the screen response characteristics and performing edge compensation analysis, the phenomenon of edge blurring caused by liquid crystal response time limitation is reduced, and the accuracy of edge detection is improved.

The invention provides an intracranial pressure real-time monitoring and drainage adaptive control optimization system. The intracranial pressure real-time monitoring and drainage self-adaptive control optimization system comprises a hardware module, a software module and a mathematical model, the intracranial pressure is monitored in real time through a high-precision sensor, self-adaptive adjustment is carried out based on individual characteristics of a patient to optimize drainage control, and the hardware module comprises the high-precision pressure sensor used for monitoring the intracranial pressure in real time, and the software module is used for monitoring the intracranial pressure in real time; the drainage pipeline is connected into the patient valine and used for adjusting drainage of cerebrospinal fluid. By combining the high-precision pressure sensor, the artificial intelligence algorithm, the neural network and the fuzzy control strategy, the real-time response capability of the system to the intracranial pressure change is remarkably improved. The preferably adopted micro electro mechanical system sensor has the advantages of being high in precision and low in delay, intracranial pressure changes as small as 0.01 mmHg can be detected, and the drifting phenomenon of the sensor in long-term monitoring is reduced through the self-calibration function.

The invention discloses a multi-target tracking method based on joint detection and feature embedding. The method comprises the following steps: acquiring different features of an input detection branch and an identity branch through a feature separation module; inputting the features of the identity branches to obtain finer feature expression through a multi-scale feature fusion module, and inputting the features of the detection branches to obtain a detection result of a t frame through a target detector; the data association module firstly matches a high-score detection frame with all existing tracks for the first time, and then matches unmatched tracks in the first stage with a low-score detection frame for the second time, so that a target in the low-score detection frame is correctly matched with the previous track and background interference is removed; and if the two times of matching are not successful, carrying out continuous hypothesis tracking, reserving target trajectory information and a feature x frame, and finally executing unified trajectory management. According to the method, the tracking precision and speed can still be kept under the conditions of camera shaking, local shielding and the like.

The invention discloses an environment-friendly construction dust suppression device and method, and relates to the technical field of environment-friendly construction. According to the environment-friendly construction dust suppression device, through the design of a composite mechanism, a suction fan is inserted into the outer side of an external connection disc, so that disassembly and assembly are facilitated, follow-up replacement and maintenance are facilitated, the suction fan is started, wind enters from the side, close to a flowing pipe, of the inner wall of a composite shell and flows towards the side of the suction fan, and therefore dust and smell on a site are absorbed; the situation that the site environment is too severe, personnel safety is affected, potential safety hazards are reduced, the flowing pipe is of a structure with the two wide ends and the middle narrow and small, according to the Bernoulli principle, the diameter of the pipeline is reduced, the flowing speed of gas is increased, and therefore the operation effect is improved, and the cleaning efficiency of the construction site is improved; dust and air flow enter the composite shell, harmful gas of the air flow is filtered and purified through the filtering mechanism, and therefore normal operation of equipment is kept.

The invention discloses a focal length high-precision detection device and method for a long-focal-length optical system. The problems that an existing focal length detection method is low in detection repetition precision, poor in precision and not suitable for the long-focal-length optical system are solved. According to the invention, a light spot of light returned by an optical system is focused on a detector with clear imaging by using a beam splitter prism to replace a conventional detection method for observing and aiming a Perot plate image, adjusting the deflection angle of a plane mirror, and respectively recording the movement position of the light spot and the deflection angle of the plane mirror; subsequently, the movement amount of the light spot is accurately calculated through image processing, and then the focal length of the optical system is calculated.

The invention discloses a registration method based on a three-dimensional retina OCT (Optical Coherence Tomography) image, which relates to the technical field of OCT image registration, and comprises the following steps of: in the registration process of the OCT image, firstly, carrying out preliminary registration by taking anatomical feature points of the retina as key references of basic alignment, and eliminating global mismatching errors; after the preliminary registration is completed, the OCT image is divided into a plurality of sub-regions in an equal area, and each sub-region is used as an independent analysis unit, thereby facilitating the subsequent precise analysis of the local optical characteristics of each analysis unit. According to the method, global errors are eliminated through initial registration of retina anatomical feature points, image division and abnormal signal extraction are combined, healthy and scar tissue areas are intelligently recognized through a machine learning model, weights are dynamically adjusted to preferentially depend on the healthy areas, interference of scars on registration is reduced, registration reliability is improved, clinical misjudgment is reduced, and the accuracy of registration is improved. And technical support is provided for accurate diagnosis and treatment of retinopathy.

The invention discloses a superconducting magnet device and a vector magnetic field loading method. The method comprises the following steps: step 1, determining the size and the direction of a vector magnetic field; the superconducting magnet device and the vector magnetic field loading method are provided. Under the same working magnetic field, the structure space is smaller, the magnetic field utilization rate is higher, the manufacturing cost can be remarkably reduced, meanwhile, the uniformity of the magnetic fields provided by the X coil and the Y coil is higher, meanwhile, the ultra-low vibration performance is achieved under the high magnetic field, the optical or magnetic measurement requirement with the very high vibration requirement can be met, and the application prospect is wide. The superconducting coil is cooled by using the flexible cold conduction belt, the vibration of the superconducting coil can be effectively reduced, the vibration stability of a magnetic field is improved, 0.5-1% of current is overshot when the magnetic field is loaded, and then the current is adjusted to be reduced to a target magnetic field, so that the magnetic field can be quickly stabilized, and the drift effect of the magnetic field is reduced.

The invention discloses a dynamic sliding window optimization method for a 3D laser radar inertial SLAM system, relates to the technical field of SLAM, and aims to improve the precision of pose estimation of an existing laser inertial SLAM system in a complex motion state of a robot. According to the method, the key frame is selected according to the displacement difference and the rotation difference, the key frame is further divided into the strong key frame and the weak key frame, when the window slides, a multi-slide-in and multi-slide-out dynamic optimization strategy of the strong and weak key frames is designed, and the dynamic optimization of the strong and weak key frames is realized in combination with double standards of whether the window meets optimization conditions or not. And the SLAM system is endowed with the capability of dynamically adjusting the window size according to different motion states of the robot. Besides, a two-time optimization scheme of key frame optimization in the sliding window and local common frame optimization in the sliding window is designed, a relatively accurate optimization reference can be provided for common frame optimization after key frame optimization, and more reliable marginalized prior information can be provided for next key frame optimization after common frame optimization. Therefore, the pose estimation precision of the SLAM system in the complex motion state of the robot is improved.

The utility model relates to a stacking machine tray position detection mechanism, and relates to the field of stacking machines, the stacking machine tray position detection mechanism comprises two positioning seats fixedly installed on the ground, and a placing groove used for placing a tray is formed between the two positioning seats; the two positioning seats are fixedly connected with driving parts respectively, the driving ends of the driving parts are fixedly connected with positioning plates respectively, the two positioning plates are arranged on the positioning seats in a sliding mode, and the two positioning plates extend into inserting grooves in the two sides of trays at the bottom of a tray pile respectively; and a tray sensing module, a position detection module, a signal processing module and a buzzer. Position detection can be carried out on the to-be-stacked trays, and the situation that due to deviation of the tray pile, the tray pile collapses in the carrying process is reduced.

The invention discloses a liquid crystal display gray scale dynamic adjustment method conforming to human eye brightness perception. The method comprises the following steps that S1, an electro-optical characteristic curve of a liquid crystal display is obtained; s2, determining an optimal gray scale voltage range of the liquid crystal display; s3, acquiring ambient light brightness in real time; s4, determining brightness distribution of the liquid crystal display; s5, determining a human eye brightness sensitivity index range; s6, dynamically adjusting the gray scale index range of the liquid crystal display; and S7, performing gray scale driving on the liquid crystal display. By determining the optimal gray scale voltage range and dynamically adjusting the gray scale index, the gray scale offset phenomenon under different visual angles can be effectively reduced, and the human eye brightness sensitivity index can be matched with the gray scale index of the liquid crystal display under the condition of different ambient light brightness and liquid crystal display brightness, so that the human eye brightness sensitivity index can be matched with the gray scale index of the liquid crystal display. And a display effect conforming to human eye brightness perception is realized.

The automatic conveying device for grinding ball production comprises a roller device, the roller device comprises a roller, and the roller can rotate with the axis of the roller as the rotation axis; the spiral conveying pipes are fixed to the inner wall of the roller, grinding ball conveying grooves are formed between adjacent sections of the spiral conveying pipes located on the same side of the roller, air suction hole sets are formed in the side walls of the spiral conveying pipes, and the spiral conveying pipes are heat conduction pipes; the air suction assembly is connected with one end of the spiral conveying pipe and used for sucking an inner cavity of the spiral conveying pipe; and the heat exchange facility is arranged in the spiral conveying pipe, the heat exchange facility can transfer heat to the spiral conveying pipe, and the heat is transferred to the inner cavity of the roller through the spiral conveying pipe, or the heat exchange facility can absorb the heat in the inner cavity of the roller through the spiral conveying pipe. The cooling speed and temperature of the grinding balls can be accurately controlled in the conveying process, quenching node temperature fluctuation caused by environment temperature changes is reduced, and therefore the quality consistency of the grinding balls is improved.

The invention discloses a two-dimensional perovskite single crystal, slurry, a preparation method of the two-dimensional perovskite single crystal and application of the two-dimensional perovskite single crystal and the slurry in an integrated X-ray detector, and belongs to the technical field of X-ray detection. A two-dimensional perovskite single crystal and slurry are successfully prepared through a simple preparation process, the chemical structural formula of the two-dimensional perovskite single crystal is [M (O3S-(CH2) 2-NH3) 2] PbX4, M is Cu, Zn, Ni, Co or Cd, and X is Cl or Br, meanwhile, integration of a two-dimensional perovskite active material and a functional array panel is realized, and the two-dimensional perovskite single crystal with high sensitivity, high sensitivity, high sensitivity, high sensitivity, high sensitivity, high sensitivity, high sensitivity and high stability is successfully prepared. The integrated X-ray detector is excellent in imaging quality and stable in work. The detector is low in preparation cost and can be used in the fields of industrial flaw detection and the like.

The utility model relates to a detection device, in particular to a camera incoming material detection device, which comprises a carrier, the carrier comprises a locking piece, a reinforcing assembly, a first carrier plate and a second carrier plate, and the first carrier plate is movably connected with the second carrier plate; an accommodating groove and a sliding hole are formed in the first carrier plate, the accommodating groove is used for placing a to-be-tested camera, and the sliding hole is communicated with the accommodating groove; the second carrier plate and the first carrier plate clamp a to-be-tested camera located in the accommodating groove; a through hole is formed in the second carrier plate, the cross section of the through hole is smaller than that of the opening of the containing groove, the through hole communicates with the containing groove, and the through hole and the sliding hole are formed in the two opposite sides of the containing groove; the reinforcing assembly comprises an elastic piece, the elastic piece is arranged in the sliding hole, and the elastic piece stretches out and draws back in the first direction; the locking piece is used for clamping the to-be-tested camera located in the containing groove between the second carrier plate and the first carrier plate and locking the first carrier plate and the second carrier plate. The camera incoming material detection device provided by the utility model can adapt to the existing detection process.

The invention discloses an SLAM real-time positioning optimization system based on an OSM map. The SLAM real-time positioning optimization system comprises a priori OSM map preprocessing module, an SLAM positioning data processing module, a data alignment module and an SLAM positioning map optimization module. According to the method, the map environment information of the Open Street Map type map, the topological information and semantic information of the prior map are extracted and are aligned with the positioning information of the SLAM in real time, so that the SLAM can adjust positioning based on the OSM map information, drift is reduced, and the positioning accuracy is improved.

The invention relates to the technical field of civil aviation, in particular to a vehicle and aircraft anti-collision method and system based on 5G AeroMACS communication, and the method mainly comprises the steps: building an aircraft position data analysis and processing model on a cloud intelligent analysis and processing server; performing real-time analysis and calculation on position data predicted in a plurality of time ranges at present and in the future in the running process of the aircraft and the vehicle through an aircraft position data analysis and processing model in combination with the first basic data and the second basic data; according to the system, the conditions of impending or potential collision risks and the like are analyzed to obtain a result whether the collision risks exist or not, and a disposal or route adjustment scheme is generated, so that the system can guarantee the airport operation safety to the maximum extent, and the safety management requirements of vehicles are guaranteed; in particular, collisions between ground vehicles and obstacles, in particular aircraft, are prevented.

The utility model discloses a limiting mechanism of a film cutting machine, which comprises a base, a cutting knife and a limiting assembly, a support is arranged on the base, a sliding seat is arranged on the support, the cutting knife is detachably arranged on the sliding seat, and the limiting assembly is arranged on the side wall of the sliding seat. The limiting assembly comprises a pressing rod and an elastic piece, the elastic piece is arranged on the side wall of the sliding base, and the pressing rod is arranged on the elastic piece. The utility model belongs to the technical field of limiting mechanisms, and particularly relates to a limiting mechanism of a film cutting machine.

The invention discloses a sandy land photovoltaic platform, and relates to the technical field of photovoltaic panels. The photovoltaic panel comprises a stand column, a connecting support is fixed to the upper end of the stand column, photovoltaic panel bodies are installed on the connecting support and arranged in a rectangular array, a cleaning mechanism is arranged on the connecting support and comprises connecting columns installed on the photovoltaic panel bodies, cleaning brushes are fixed to the connecting columns, and the photovoltaic panel bodies are arranged on the connecting columns. The cleaning brush is in contact with the photovoltaic panel body, and the connecting support is provided with a driving structure used for driving the cleaning brush to move. When the photovoltaic panel needs to be cleaned, a signal is sent to the controller through remote control, the controller controls the driving motor to work, the driving motor drives the cleaning brush to move and enables the cleaning brush to rotate, the surface of the photovoltaic panel is cleaned through the rotary reciprocating cleaning brush, the whole cleaning effect is good, cleaning is convenient, and the cleaning efficiency is high. Cleaning equipment does not need to be installed during cleaning each time, and convenience is improved.

The utility model discloses a dust-proof device for powder blanking, which belongs to the technical field of powder blanking, aims at solving the problems that the powder is easy to fly around, some economic losses are caused and the body health of workers is influenced, and comprises a conveyor belt, a box body mechanism, a lifting mechanism, a clamping mechanism and a closing mechanism, the box body mechanism is arranged above the conveying belt, the lifting mechanism is arranged in the box body mechanism, the clamping mechanism is arranged in the lifting mechanism, the closing mechanisms are symmetrically arranged in the box body mechanism, the blade is fixedly installed on the lower middle portion of the interior of the discharging box, and a discharging port is formed in the bottom face of the discharging box. Bagged powder is punctured and clamped through the arranged clamping mechanism, then the powder is driven by the lifting mechanism to move downwards until the blade in the discharging box cuts a bag and leaks out the powder in the bag, discharging is completed, and the phenomenon that the powder drifts away is reduced.

The invention discloses a gas sensor, and a temperature control system and method for the gas sensor, relates to the technical field of gas sensors, and aims to solve the problem that when the ambient temperature around the gas sensor is reduced, the change of the ambient temperature causes drifting of an output signal of the gas sensor, resulting in errors of a measurement result of the gas sensor. According to the gas sensor, a window is formed in a shell, and a window material used for allowing gas to penetrate through and blocking liquid or solid is arranged at the window. The shell is arranged on the base, and a containing cavity is formed between the shell and the base. The base pin penetrates through the base in the direction from the window to the base. The gas sensor chip is arranged on the first surface of the base; the gas sensor chip is electrically connected with the pins; the heating structure is arranged on the second surface of the base and is electrically connected with the pins; and the heating structure is used for heating the gas sensor chip and the base. The temperature measuring structure is arranged on the first surface of the base, is positioned in the accommodating cavity and is used for measuring the actual temperature around the gas sensor chip.

The invention relates to a band-gap reference voltage circuit based on channel length modulation effect compensation. The circuit comprises a Zener voltage stabilization source module which is used for carrying out preliminary step-down on external input voltage to generate primary reference voltage; the linear voltage stabilization source module is coupled to the Zener voltage stabilization source module and is used for generating a linear voltage stabilization source; the first-order band-gap reference circuit module is coupled to the linear voltage stabilization source module and is used for generating a first current subjected to first-order temperature compensation; the lambda modulation effect high-order compensation circuit module is respectively coupled to the Zener voltage stabilization source module and the linear voltage stabilization source module, and the lambda modulation effect high-order compensation circuit module generates a second current with a high-order nonlinear temperature coefficient through a channel length modulation effect; and the starting circuit module is used for providing starting voltage and driving current in the power-on process of the band-gap reference voltage circuit. According to the invention, the reference voltage with an ultralow temperature coefficient can be realized.