106results about How to "Reduce location requirements" patented technology

The invention discloses an 'internet+' package bottle intelligent recovery system and method. The system comprises an intelligent recovery device, user terminal equipment and a cloud service which are connected through internet communication; the intelligent recovery device comprises a human-computer interactive system, an electromechanical control device, a package bottle transmitting and rotating device, a package bottle identifying device, a package bottle compressing and crushing device, and a machine cabinet. A user selects to start throwing a bottle through the human-computer interactive system or the user terminal equipment; the intelligent recovery device has the functions of identifying the bar code, the weight, the image and the material of the package bottle. If the intelligent recovery device fails to identify, the package bottle is rejected. If the package bottle is identified successfully, the package bottle is compressed and crushed, and is recovered and stored; meanwhile, the user gets rebate. The 'internet+' package bottle intelligent recovery system is convenient to operate and use; the interaction and data sharing of the user, the intelligent recovery device, internet cloud and a user terminal are realized by utilizing the internet; the popularization of an 'internet+' resource recycling development is strongly promoted.

The invention discloses a method for recognizing batch two-dimension code images. The method is used for carrying out extracting detection on one or more two-dimension code images in the same image and comprises the following sequential steps that a, a to-be-detected image including a plurality of two-dimension code image scenes is acquired; b, the background of the image to be detected is weakened or removed, and a binary image is acquired; c, the binary image is detected, and all feather points are acquired; d, the feature points are clustered, a plurality of feature point groups are acquired, the clustering radius and the clustering center of each feature point group are acquired, and each feature point group is a two-dimension code image; e, the feature point groups are split one by one, and a plurality of independent two-dimension code images are acquired; f, the two-dimension code images are recognized, integrity is verified, and two-dimension code information is acquired. The method has the advantages that the two-dimension code images in one image can be recognized at the same time, and the method is suitable for the application occasion of large-batch two-dimension code recognition.

The invention relates to a measurement and correction method of flatness of a large-diameter flange plane. The diameter of the flange plane is greater than 3 meters. And the method comprises the following steps that: the to-be-measured flange plane is cleaned to remove corrosion and paint; a laser planometer is utilized to measure flatness of the flange plane; data of the measured flange plane are obtained and are analyzed as well as a specific area that needs to be ground is indicated; a bowl plane grinder is utilized to carry out plane grinding; the laser planometer is utilized to carry out measurement and the measurement result is analyzed again so as to determine whether a precision requirement of the large-diameter flange plane is met; and grinding and measurement are carried out repeatedly until the ground large-diameter flange plane meets the designed precision requirement. According to the invention, the method can be used for measurement and correction on flatness of a large-diameter flange plane in fields like ocean engineering, ship construction, wind power generation and mechanical manufacturing and the like; it is beneficial to improve service life of the large-diameter flange plane, improve measurement precision of the flatness of the flange plane, shorten a construction period and reduce construction cost.

The invention discloses a field vibration load identification-based evaluation method and a system. The method comprises the steps of S1, obtaining the vibration acceleration time-domain data of to-be-tested equipment during the actual operation through the field test method; S2, subjecting the vibration acceleration time-domain data to mathematical treatment and obtaining the vibration acceleration frequency data of the equipment through calculating; S3, according to a pre-designed vibration simulation model of the to-be-tested equipment and a pre-determined main load exciting-force position of the to-be-tested equipment, inputting the vibration acceleration frequency data into the vibration simulation model, and obtaining the main load exciting force of the to-be-tested equipment through calculating; S4, subjecting the main load exciting force to mathematical treatment and obtaining the main exciting force load of the to-be-tested equipment through calculating. According to the technical scheme of the invention, based on the field vibration test and the simulated calculation, the actual vibration and force load environment for all parts and the sub-components of the equipment can be obtained according to limited and actually measured vibration data. The method and the system have the advantages of convenient operation, low testing risk, high evaluation accuracy and the like.

The invention, which relates to the technical field of the machine vision, discloses a machine-vision-based workpiece detection method and system. The workpiece detection method comprises: a contour of a workpiece in a target image is determined; a minimum circumscribed rectangle of the contour is determined; according to the minimum circumscribed rectangle and the target image, the direction of the workpiece in the target image is adjusted, so that the direction of the workpiece in the target image is consistent with the workpiece direction of a sample image; an HOG feature in the sample image is extracted and an SVM classifier is trained by using the HOG feature; and the target image is detected by using the trained SVM classifier to classify the workpiece in the target image. Accordingto the invention, a problem that the traditional industrial robot can not intelligently identify and locate the workpiece is solved; and with the machine vision algorithm, the workpiece is classifiedand located well. The method has no requirement on the attitude angle of the workpiece; and detection can be carried out continuously on the condition of shielding existence.

The invention provides a device for real-time power feedback of a high-power optical fiber laser. The device comprises a metal base, a double cladding optical fiber connected with a to-be-detected laser, a glass tube, a metal clamp and a photoelectric detector, wherein the metal base is provided with an optical fiber groove; the double cladding optical fiber is provided with a fusion welding point; an inner cladding on one side of the fusion welding point is subjected to corrosion and polishing to form abrasion parts; the glass tube is sleeved at the fusion welding point and the abrasion parts; the glass tube and the double cladding optical fiber are arranged in the optical fiber groove; the metal clamp is arranged on the metal base; and the photoelectric detector is arranged on the metal clamp, and used for detecting leakage light of the abrasion parts.

The invention belongs to dynamic video image fusion methods and discloses a coal mining fully mechanized excavation face dynamic video image fusion method. The coal mining fully mechanized excavation face dynamic video image fusion method comprises the steps that the camera placement axis is selected, and two or more megapixel network cameras are arranged around the camera axis and cover the whole coal mining fully mechanized excavation face; video frame images obtained by the adjacent cameras are required to have an overlapped area of about one third; then obtained coal mining fully mechanized excavation face dynamic videos are fused. The coal mining fully mechanized excavation face dynamic video image fusion method has the advantages that a cascade Hash feature matching algorithm uses two times of Hash mapping, and the feature matching precision and speed are ensured; a parallax tolerate transformation model uses a feature point growth rule and a dynamic programming algorithm, the video fusion speed is increased, the requirements for the positions of the cameras in the video fusion process are reduced, and a good dynamic video fusion effect can still be obtained for cameras with large parallax and large rotation. The coal mining working efficiency is improved, and the coal safe production is ensured.

The invention relates to a data center energy-saving cooling system based on the heat pipe technology. The data center energy-saving cooling system comprises an additionally-installed heat cabinet, an additionally-installed refrigerator, a heat pipe system, an air exhaust fan and a closed pipeline. The additionally-installed heat cabinet is connected to the back of a cabinet, the additionally-installed refrigerator is connected to the back of the additionally-installed heat cabinet, one end of the closed pipeline is communicated with the upper end of the additionally-installed refrigerator, the other end of the closed pipeline is communicated with an air conditioner system, the air exhaust fan is installed at the joint of the additionally-installed refrigerator and the closed pipeline, and a vent hole is formed in the bottom of the additionally-installed refrigerator and used for being communicated with a floor air supplying system. The heat pipe system comprises a plurality of heat pipes. Each heat pipe comprises an evaporating section and a cooling section, wherein the evaporating section is located in the additionally-installed heat cabinet, the cooling section is located in the additionally-installed refrigerator, and one end of the heat pipe is connected with the back wall of the cabinet. The temperature of hot air mass exhausted out of an outlet in the back of the cabinet can be further reduced, the overall heat dissipation efficiency of a machine room is improved, and the power consumption of a refrigeration device for cooling a server in the machine room is reduced.

The invention provides a current sensor easy to install and with a magneto-electric composite material. The current sensor comprises a magnet ring formed by assembling magnetic cores, and a sensitivecomponent composed of a magnetostrictive material layer and piezoelectric ceramic material layers arranged in the two sides of the magnetostrictive material layer respectively; an electrode in the endportions of the piezoelectric ceramic material layers is connected with the signal processing circuit via a lead; the signal processing circuit processes a voltage signal output by the piezoelectricceramic material layers and then sends the processed signal to external equipment for display, the bottom of the sensor is provided with a bearer which includes an elastic thin metal sheet which is bent to an arc shape; installation portions in the two ends of the bearer are provided with installation holes respectively; and the when the bearer bears a pressure, the arc-shaped thin metal sheet isdeformed, and thus, distance between the two installation holes is adjusted. The current sensor is high in stability and resolution, simple in operation and wide in suitable range.

The invention relates to a DLP display screen system and a splicing method thereof. The DLP display screen system comprises: a signal input end, an information transmission unit and a 16:9 DLP wide-screen display terminal, wherein the signal input end is connected with the information transmission unit which is connected with the 16:9 DLP wide-screen display terminal. The DLP display screen splicing method comprises the steps: installing 16:9 DLP single-screens in a frame one by one based on a 2 x N mode and installing 16:9 light-emitting machines above and / or below the 16:9 DLP display screen. The 16:9 DLP display screen system has good display effect, low use cost, low power consumption and small amount of heat dissipation, and is suitable for most long-time indoor display. By adopting the DLP display screen splicing method according to the invention, small splicing seam between screens is achieved, and the 16:9 light-emitting machines are arranged at the upper and lower ends of thespliced screen, so no space for maintenance is required in advance, which reduces the thickness of the screen.

The invention relates to a centralized intelligent electric meter. The electric meter comprises a plurality of electric energy sampling modules, wherein each electric energy sampling module is connected with a measuring module; the measuring module is connected with a signal selection module; the signal selection module is connected with a control processing unit; the control processing unit is connected with a display module; each electric energy sampling module acquires the electric quantity of each user and transmits the acquired signal to the measuring module; the measuring module converts the signal acquired by each electric energy sampling module into a frequency signal; the frequency signal passes through the signal selection module and is transmitted to the control processing unit; and the control processing unit processes the signal and transmits the processed signal to the display module for display. The electricity utilization data of a plurality of users is centralized on the same display screen for polling display, so that the requirement of the electric meter on an installation position is reduced, the meter reading efficiency of meter reading personnel is improved, and management and maintenance cost is reduced.

The present application relates to a transcatheter valve replacement system. The system includes a valve replacement prosthesis, a delivery catheter, a control handle and an anchoring device; the valve replacement prosthesis includes a valve stent, an artificial valve leaflet and an adaptive covered stent, the artificial valve leaflet is arranged in the valve stent, the adaptive covered stent is connected to the outer periphery of the valve stent, the valve replacement prosthesis is provided with an anchored unit, and the anchored unit is fixed to heart tissue by the anchoring device; and theanchoring device is arranged in the delivery catheter, the anchoring device includes an anchoring needle, an anchoring needle catheter, an anchoring needle push rod, and a controllable guiding device,the anchoring needle is pre-installed in the distal end of the anchoring needle catheter, the distal end part of the anchoring needle catheter has a flexible structure, one end of the controllable guiding device is detachably connected to the anchored unit, and the controllable guiding device can control the distal end part of the anchoring needle catheter to form a fixed bend angle in the radialdirection and make the distal end of the anchoring needle catheter adhered to the anchored unit.

The invention discloses a testing device. The testing device comprises a working platform, wherein a scanning recognizing mechanism, a testing mechanism and a manipulator are arranged on the working platform; the scanning recognizing mechanism is used for scanning a recognizing code on a workpiece in order to obtain workpiece information; the testing mechanism is used for acquiring testing information based on the workpiece information and testing the workpiece based on the testing information; a clamping mechanism, comprising a first clamping head, a second clamping head and at least one spacing adjusting assembly, is arranged at the end part of the manipulator; the spacing adjusting assembly penetrates the first clamping head and the second clamping head and is used for adjusting the spacing between the first clamping head and the second clamping head. According to the testing device, the scanning recognizing mechanism, the testing mechanism and the manipulator are arranged, so thatthe workpiece can be automatically fed and discharged and automatically tested; the spacing adjusting assembly is arranged and is used for adjusting the spacing between the two clamping heads to a position where the workpiece with required size can be clamped, and thus the workpieces with different sizes can be clamped.

The invention belongs to the technology of fiber optic gyroscopes, and particularly relates to a testing method of a closed-loop fiber optic gyroscope threshold value. The method comprises the following steps: firstly determining a fiber optic gyroscope invalid area, separately performing positive threshold value testing and negative threshold value testing of the linearity near a gyroscope zero output position of the invalid area, and then taking a testing value in a position of half of the width of the invalid area as a positive threshold value and a negative threshold value. According to the method, the linearity near the gyroscope zero output position in the gyroscope invalid area is used for evaluating the threshold value of a gyroscope, a zero output method is clear in gyroscope threshold value evaluation mechanism, and the closed-loop fiber optic gyroscope threshold value is truly evaluated in terms of the mechanism. Meanwhile, the method only requires finding out the invalid area near the gyroscope zero output position, and the requirements on the positional accuracy of a rotary table and the geometric tolerance of a testing fixture are low, so that testing schemes are convenient to flexibly formulate.

The embodiment of the invention provides a detection system, method and device and a computer readable storage medium. The system comprises a computer, an industrial camera and a driving device of a to-be-detected display device. The industrial camera and the driving device of the display device to be tested are electrically connected with the computer; The computer is used for controlling the driving device of the to-be-tested display device to drive the to-be-tested display device to display the target image the industrial camera is controlled to obtain a target image displayed by the to-be-tested display device; image resampling and transformation are carried out on the target image according to the conversion model to obtain a target image after image registration; brightness mapping on the target image is carried out after image registration to obtain a standard target image consistent with the resolution of the to-be-tested display device; The pixel defect of the to-be-tested display device corresponding to the standard target image is determined. The system can reduce the detection difficulty and improve the detection efficiency.

The invention discloses a cloud broadcasting system, a mixed broadcasting system and a cloud broadcasting method. The cloud broadcasting system comprises a local broadcasting control system, a material server and a cloud server, wherein the local broadcasting control device is used for controlling pushing programs and program materials; the material server is used for providing the program materials to be broadcasted; the cloud server is connected with the local broadcasting device and the material server, receives the pushed programs and the program materials and sends program materials to a designated position after processing the program materials. According to the cloud broadcasting method, the programs and the program materials are pushed to the cloud server from the local; the cloud server processes the received program materials to a TS (transport stream); and the TS is sent to the designated place. The cloud broadcasting system, the mixed broadcasting system and the cloud broadcasting method have improvements in aspects of construction cost, cycle, operation maintenance, upgrade, safety and the like, conveniently achieve heterogeneous and remote broadcasting which can be achieved basically through machine rooms with the Internet and necessary video equipment.

The invention discloses a welding gun angle adjusting device which comprises a first welding gun assembly and a second welding gun assembly. The first welding gun assembly is installed on a first pitching adjusting device, and the first pitching adjusting device is arranged on a first front-back adjusting device. The first front-back adjusting device is connected with a sliding plate of a first lead screw sliding table. The second welding gun assembly is mounted on a second pitching adjusting device, and the second pitching adjusting device is arranged on a second front-back adjusting device.The second front-back adjusting device is connected with a sliding plate of a second lead screw sliding table, the second lead screw sliding table is connected with a sliding plate of a third lead screw sliding table, the first lead screw sliding table is fixedly arranged at one end of a fourth lead screw sliding table, and the third lead screw sliding table is arranged on a sliding plate of the fourth lead screw sliding table. According to the welding gun angle adjusting device, the welding angles of two welding guns can be adjusted in any direction, distance adjustment between three dimensions ca be carried out on the two welding guns, and the adjusting requirement of double-wire flat angle welding for the angles of the welding guns can be met.

The invention discloses a multifunctional side-turning medical bed. The medical bed comprises a bed body, a side-turning mechanism, a leg lifting mechanism and a back lifting mechanism, the bed body comprises a bed frame, an upper bed plate, a lower bed plate and a bed foot rest, and the side-turning mechanism comprises a side-turning upper plate, a side-turning middle plate, a side-turning lowerplate, a side-turning tail plate and side-turning guardrails; the side-turning guardrails are arranged at two sides of the side-turning mechanism in a rib row shape, the side-turning mechanism can bedriven to turn over, and the side-turning mechanism and the side-turning guardrails can cross each other during turning over and form a body placing area; the back lifting mechanism is used for controlling the upper bed plate to be lifted, and the upper bed plate can drive the side-turning upper plate to be lifted when being lifted; and the leg lifting mechanism is used for controlling the liftingof the side-turning lower plate and the side-turning tail plate. The medical bed provided by the invention integrates the functions of side turning, back lifting, stool and urine receiving and leg lifting into a whole, has higher reliability and better comfort, and can better meet the nursing requirements of bedridden people.

The invention discloses a solar power station, which comprises a plurality of concentrated solar cell monomer modules which are electrically connected. Each monomer module comprises a condensing lens, a solar cell semiconductor chip, a horizontal and pitching rotation driving mechanism for driving the monomer module to carry out horizontal and pitching motion by following the sun. The plurality of concentrated solar cell monomer modules form module arrays which are arranged in mutually-spaced L distance along the horizontal direction, and the L meets a relational expression that L is equal to W / cosine alpha, wherein in the formula, W is the width of the concentrated solar cell monomer modules, and alpha is a solar azimuth determined by the latitude theta of a mounting site of the power station. The power station has low requirement on the mounting site and position, is not easy to damage under strong wind, and is convenient to mount and maintain; and the arrangement structure of the concentrated solar cell monomer modules in the power station and the distance of mutual intervals are reasonable, the occupied area is small, and the monomer modules are not mutually affected during working and can absorb sunlight more effectively so as to achieve maximum generating efficiency.

A hydraulic module having a cylinder (2) which accommodates a piston (3) which delimits a chamber (4) which receives the brake fluid. The piston (3) is connected to the electric motor (5) of the module (1) by way of a recirculating ball spindle (6), the core (61) of which is connected fixedly to the piston (3) which itself is guided by way of needles (21) which are parallel to the axis (xx) of thepiston (3) and with which notches (351) on the circumference of the piston (3) interact. The piston (3) is a piece which is formed from a cylindrical body (32) made from anodized aluminium and an outer ring (35) which is made from steel, is positively mounted on the edge (34) of the piston and is provided with notches (351) with a cross section which corresponds to the useful cross section of theneedles (21).

The invention provides an organic fertilizer prepared from antiviral granule medicine dregs and a preparation method thereof. In the organic fertilizer converted from antiviral granule traditional Chinese medicine dregs, the organic content is higher than 70 wt%, and the total content of nitrogen, phosphorus and potassium is higher than 5.0 wt%. The preparation method has the characteristics of high industrialization degree, short production cycle, complete fermentation, stable product quality and the like, and is simple to operate. The fermentation process does not comprise the drying step, thereby greatly saving the cost. The drying time is short, and the geographical position requirement is low, so the organic fertilizer can be widely used. By adding the pulverizing and screening steps, the organic fertilizer finished product has proper granular size, so that the sufficiently fermented components can be conveniently separated from the insufficiently fermented components, thereby enhancing the quality of the organic fertilizer finished product; and the granules incapable of passing through the screen are returned to continue fermentation treatment, so that the traditional Chinese medicine dregs are completely utilized, thereby conforming to the idea of environmental protection.

The invention discloses a cosmetic container. The cosmetic container comprises a bottle body, a pump head and an elastic sucking disc, the bottle body is internally provided with a sucking pipe, the sucking pipe is internally provided with a first one-way valve, the pump head comprises a head seat and a vertical pump pipe, and the lower end of the vertical pump pipe is provided with an inner piston; the inner piston is located on the upper portion of the first one-way valve, the vertical pump pipe is internally provided with a second one-way valve, the bottle body is provided with a balance one-way valve, and the balance one-way valve can be passed from the internal to the bottle body; the sucking pipe is internally provided with a lower jacking spring and a limiting ring, the upper end ofthe lower jacking spring is in contact with the top portion in the bottle body, the lower end of the lower jacking spring is in contact with the upper end of the inner piston, and the lower end of the inner piston is in contact with the limiting ring. The cosmetic container has the advantages that the fluid-shaped cosmetics can be effectively stored, the cosmetic container can locate itself, thelocating operation is simple and convenient, the requirement of the locating position is low, the adaptation is strong, the cosmetic container is not slipped easily when being taken, the stability inthe process of the use is good, the problem that the cosmetics fall into the surrounding area caused by being slipped when being taken can be avoided, the waste can be avoided, and surrounding articles can be protected.

The invention provides a consumable chip, a printing consumable, a packing material, equipment and a communication method. The consumable chip comprises a power supply module, a control circuit and a photoelectric conversion module; the power supply module is used for supplying power to the control circuit; the photoelectric conversion module is connected with the signal input end of the control circuit, and the photoelectric conversion module is used for receiving an optical communication signal and converting the optical communication signal into an electric communication signal; and the control circuit is used for receiving the electric communication signal and updating data stored in the control circuit according to the electric communication signal. According to the consumable chip, the information input of the consumable chip is realized through an optical signal, a larger window does not need to be formed in the packing material, and the sealing performance of the packing material is ensured. Besides, the optical signal can be transmitted for a long distance, and light spots of the optical signal are large, so that accurate alignment is not needed during information input, and the position requirement of the consumable chip in the packing material is reduced.

It is a method to access CIS image from real-time on-line printing board verifier. This method substitutes CIS image sensor for OCD image sensor to be used as components of image access and to constitute the printing board verifier. This method is featured with low cost and simple process by employing such printing board verifier.

The invention relates to a DLP display screen system and a splicing method thereof. The DLP display screen system comprises: a signal input end, an information transmission unit and a 16:9 DLP wide-screen display terminal, wherein the signal input end is connected with the information transmission unit which is connected with the 16:9 DLP wide-screen display terminal. The DLP display screen splicing method comprises the steps: installing 16:9 DLP single-screens in a frame one by one based on a 2 x N mode and installing 16:9 light-emitting machines above and / or below the 16:9 DLP display screen. The 16:9 DLP display screen system has good display effect, low use cost, low power consumption and small amount of heat dissipation, and is suitable for most long-time indoor display. By adopting the DLP display screen splicing method according to the invention, small splicing seam between screens is achieved, and the 16:9 light-emitting machines are arranged at the upper and lower ends of thespliced screen, so no space for maintenance is required in advance, which reduces the thickness of the screen.

The invention discloses a rotating arm crane pipe for loading hydrochloric acid and belongs to the technical field of crane pipes. The rotating arm crane pipe comprises a supporting frame component, a rotating arm component, a hydraulic cylinder, a vertical pipe, a sealing cap, an extensible pipe, a liquid level meter, a gas-phase hose and a liquid-phase hose, the supporting frame component comprises an upright, a support, a bracket, a supporting column, a rotary supporting seat, a first rotating joint and a first pneumatic motor, the rotating arm component comprises a first elbow, an inner arm, a second elbow, a second rotating joint, a second pneumatic motor, a vertical arm, a third elbow and an outer arm, polytef is lined in the vertical pipe, and the extensible pipe which downwards penetrates the sealing cap and is made by polypropylene is arranged in the vertical pipe in a sleeved manner. The rotating joints are driven to rotate through the pneumatic motors, so that accuracy in alignment is realized, rotating angle of the hoses is reduced, and service lives of the hoses are prolonged; the polytef is lined in the vertical pipe and used for making the liquid-phase hose and the gas-phase hose, so that the circumstance that a rubber pipe is prone to embrittlement and breaking leading to acid leakage when being corroded by the acid for a long time is avoided.

The invention provides a screen color difference compensation method, device and system, electronic equipment and a storage medium, and relates to the technical field of image processing. The screen color difference compensation method comprises the following steps: acquiring relative position information between shooting equipment and a shot screen; performing color difference compensation on theto-be-played image according to the relative position information and a pre-stored color compensation relationship to obtain a compensated image; transmitting the compensated image to the screen. According to the method disclosed in the embodiment of the invention, the relative position information between the photographing equipment and the photographed screen is obtained in real time, the corresponding color difference compensation of an output image of the screen is carried out through the pre-stored corresponding relation between different relative position information between the photographing equipment and the photographed screen and color deviation data; the compensated image is finally obtained, so that compensation can be performed in time according to the position change of theshooting equipment, the position requirement on the shooting equipment is reduced, and the video recording quality is improved.

The invention discloses a power generation system which comprises a high pressure air system, a channel switching system, a gas-liquid mixing system, a fluid-power power generation system and a control system. The high pressure air system, the gas-liquid mixing system and the fluid-power power power generation system are connected through the channel switching system and are controlled by the control system; the control system changes operating states of the power generation system; the operating states of the power generation system are divided into an energy storage state and a power generation state: when at the energy storage state, the power generation system absorbs new energy electric energy from a power grid and converts the new energy electric energy into compressed air which is stored in the high pressure air system; and when at the power generation state, under the function of the control system, air energy is converted into electric energy through the high pressure air system, the gas-liquid mixing system the fluid-power power power generation system and the channel switching system. According to the power generation system provided by the invention, the phenomena of wind curtailment, light curtailment and water curtailment can be alleviated, and the problem of low consumption proportion of renewable energy sources caused by difficult renewable energy source grid-connection and difficult consumption after grid-connection is solved.

The invention discloses an electronic expansion valve, and belongs to the technical field of expansion valves. The electronic expansion valve comprises a valve seat and a sleeve, wherein the valve seat is arranged on a valve body, and the sleeve is fixed on the valve seat; a first channel and a second channel are formed in the valve body, and the valve seat is provided with a circulation channel located between the first channel and the second channel and a valve port; a valve needle and a rotor assembly used for driving the valve needle to move back and forth are arranged in the sleeve, a guide hole matched with the valve needle is formed in the valve seat, and the valve needle is opened or closed when the valve needle moves back and forth along the guide hole; and an upper valve cavity communicating with the interior of the sleeve is arranged on one side of the valve seat, a lower valve cavity communicating with the second channel is arranged on other side of the valve seat, and a balance hole for communicating the upper valve cavity with the lower valve cavity is formed between the upper valve cavity and the lower valve cavity. According to the electronic expansion valve, the balance hole for communicating the upper valve cavity with the lower valve cavity is formed; and under the action of the balance hole, the pressure in the upper valve cavity and the pressure in the lower valve cavity are consistent, and the pressure difference formed by the upper valve cavity and the first channel on the valve needle and the pressure difference formed by the first channel and the lower valve cavity on the valve needle are counteracted by each other.