245 results about "Opening height" patented technology

The invention discloses an irregularly-shaped display panel and a display device. The display area of the irregularly-shaped display panel is provided with an irregularly-shaped boundary, the display panel comprises low-brightness pixels and conventional pixels, the pixels form a plurality of pixel rows and a plurality of pixel lines, the pixel rows or the pixel lines comprise pixel groups, the pixel groups comprise first pixel groups and second pixel groups, the number of pixels adjacent to the regularly-shaped boundary in the first pixel groups is greater than that of pixels adjacent to the irregularly-shaped boundary in the second pixel groups, and the number of the low-brightness pixels in the first pixel groups is greater than or equal to that of the low-brightness pixels in the second pixel groups; the routing direction of a data line is a second direction, the pixels comprise at least three sub-pixels, and in the second direction, the opening heights of the sub-pixels inside the low-brightness pixels are smaller than those of the sub-pixels inside the conventional pixels; the irregularly-shaped boundary faces the direction of the display area, and the opening area of the low-brightness pixels is gradually increased. According to the irregularly-shaped display panel and the display device disclosed by the invention, the irregularly-shaped display phenomenon of a sawtooth is improved.

The invention discloses an electronic type pulse width modulation (PWM) intermittence spray type variable spraying controller. The controller is composed of a power source, a control panel, a PWM signal generator, a phase inverter, an electromagnetic valve drive circuit, electromagnetic valves, a proportional overflow valve and a proportional overflow valve control circuit. The electromagnetic valves are placed in front end pipelines of all spray heads in series. One end of the proportional overflow valve is connected with a spray rod main pipeline, and the other end of the proportional overflow valve is connected with a liquid medicine jar. The PWM signal generator can output multichannel PWM signals which are same in frequency, and independent and adjustable in duty ratio, and the frequency and the duty ratio can be adjusted through rotary knobs on the control panel. The proportional overflow valve control circuit adjusts the opening height of the proportional overflow valve according to set spray pressure, machine set operating speed and the total number of electromagnetic valves which are opened at present, and keeps system spray pressure stable. The controller is convenient to use, and can be used for controlling application dosages of a spray rod type spraying machine due to the fact that a driver can adjust the spray pressure and application dosages of each spray head on line through the rotary knobs on the control panel.

The invention discloses an electric opening and closing system for an automotive tail door. The electric opening and closing system for the automotive tail door comprises a lead screw nut sleeve, a lead screw nut and a lead screw, wherein the lead screw nut sleeve is movably connected to an automobile body, and the lead screw nut is fixed in the lead screw nut sleeve; the first end of the lead screw is movably connected to a movable door of the automotive tail door, the second end of the lead screw is arranged in the lead screw nut matched with the lead screw in a sleeved mode, and the lead screw is driven by a motor to make helical movement in the lead screw nut so as to drive the movable door of the automotive tail door to rotate by 0-150 degrees compared with the movable door in the closed state. According to the electric opening and closing system for the automotive tail door, a control system and supporting rod electric execution and mechanical transmission are integrated, both hands of an automobile owner are completely liberated, and the requirement for comfort of the automobile owner is met. In order to meet the requirements of automobile owners at different heights for the opening heights of the tail door, the electric opening and closing system for the automotive tail door has the memory function, the door opening anti-pinching function and the door closing anti-pinch function. In consideration of possible power loss of an automobile, the system can be adapted to the situation that the electric starting mode is started after the tail door is closed manually, and accordingly, response of the system is not available.

The invention discloses a multifunctional safety valve verification device which includes: a safety valve verification test unit, a measurement and control unit, and a safety protection unit. The safety valve verification test unit comprises a high-pressure needle-valve, a gas tank, a manual pressure-regulating valve, a high pressure filter, a proportional pressure-reducing valve, an electrical proportional valve, a first solenoid valve, a second solenoid valve, a normally closed pneumatic control ball valve, a normal open pneumatic control ball valve, and a safety verification station. The safety verification station is used for installing the safety valve to be tested. The measurement and control unit comprises a controller, a pressure sensor, a flow meter, and a displacement sensor. The safety protection unit is used for automatic pressure release in an experiment process. The multifunctional safety valve verification device can carry out multiple tests such as a set-pressure deviation test, a sealing test, a discharge pressure test, an on-off differential pressure test, an open height test, and a displacement and displacement coefficient test. The automation degree is high. The function is comprehensive. The multifunctional safety valve verification device is safe and reliable. The maintenance is convenient. The operation is simple, and the test counting is accurate.

The invention provides a launcher sublevel recovery method. The launcher sublevel recovery method comprises the steps that 1, an installation platform is designed and installed between an upper half section and a lower half section of an inter-level section of a sublevel, two stabilizing parachutes, two deceleration parachutes and three main parachutes are installed on the installation platform, and the lower portion of an inter-level section cabin of a launcher and the lower portion of a rear transition section cabin of the sublevel of the launcher are each provided with a buffering air bag; 2, when the sub-level falls to the parachute-opening height, the two stabilization parachutes are horizontally popped, the sublevel is vertically stabilized under the action of the stabilization parachutes, the stabilization parachutes are separated from the sublevel, the two deceleration parachutes are pulled out by the stabilization parachutes, the deceleration parachutes are inflated to decelerate the sublevel, the upper half section and the lower half section of the inter-level section of the sublevel are separated, the three main parachutes are pulled out during separation, after the main parachutes are pulled straight, the deceleration parachutes carry the upper half section of the inter-level section to enable the upper half section of the inter-level section to be separated from the main parachutes, the sublevel is decelerated steadily under the action of the main parachutes, a hung sling is pulled out from one side wall of the sublevel after the sublevel is decelerated steadily, and vertical hanging of the sublevel is converted into horizontal hanging of the sublevel; 3, the buffering air bags are opened before the sublevel lands, and then recovering is completed.

The invention relates to a parachute opening device of an unmanned aerial vehicle. The parachute opening device of the unmanned aerial vehicle comprises a parachute barrel and a parachute which is embedded in the parachute barrel. The parachute opening device of the unmanned aerial vehicle further comprises a gas generator which is arranged in the parachute barrel and positioned under the parachute. When the parachute needs to be opened, the gas generator instantaneously releases a large amount of high pressure gas, the parachute is pushed out of the parachute barrel by the instantaneously released high pressure gas and reaches an appropriate parachute opening height. Compared with the traditional spring pushing mode, the parachute opening device of the unmanned aerial vehicle has the advantages that the parachute can be pushed to the safe parachute opening height because the energy of the high pressure gas instantaneously released by the gas generator is higher so that a parachute cord is effectively prevented from being wound by a propeller and the parachute is guaranteed to be smoothly opened. The invention further relates to the unmanned aerial vehicle using the parachute opening device.

The invention provides a pilot-operated safety valve with modulation characteristic, which comprises a main valve and a modulation type guide valve, wherein a valve seat of the modulation type guide valve is fixed in the lower part of a cavity of a guide valve body; a guide valve piston is arranged above the cavity in the guide valve body and the valve seat of the guide valve; the middle upper part of a guide valve shaft is installed in the guide valve piston, and the lower part thereof is arranged in the valve seat of the guide valve; the connecting part between the upper part of the guide valve shaft and the guide valve piston is provided with an inlet sealing ring; and the connecting part between the lower part of the guide valve shaft and the valve seat of the guide valve is provided with an outlet sealing ring. The pilot-operated safety valve can be used for effectively controlling the pressure of an air chamber of the main valve, leads the pressure of the air chamber to be slowly reduced along with the augment of overpressure value, and ensures the opening height of the main valve to be gradually changed along with the overpressure value, thus guaranteeing the circulation area to be changed along with the demand of release quantity; and the discharge capacity can be adjusted according to the actual demand of the system for overpressure protection.

A feeder device for feeding a unit of media from a stack of media to a receiving apparatus is provided. The feeder device comprises a drive mechanism for driving the media in a feed direction through an opening defined by a gate apparatus. The opening extends from a first to a second edge of the gate apparatus and defines a fixed height greater than the thickness of the media. A flexible blade member is fixedly engaged with the gate apparatus at a fixed end and is cantilevered with respect to the gate apparatus. The blade member defines a length and extends from the first edge toward the second edge to reduce the opening height. The blade member is further configured to have an adjustable flexibility to allow the feeder device to feed media of varying thickness to the printing apparatus. An associated method is also provided.

The invention relates to the technical field of hydraulic drive, in particular to a hydraulic hatchcover opening device applied to a large ship, comprising an active hatchcover, a follower hatchcover and an installation seat arranged at the side of a hatchway, wherein the installation seat is hinged with a turning cover which is fixedly connected with one side end of the active hatchcover, and the other side end of the active hatchcover is hinged with the rear side end of the follower hatchcover; the front side end of the follower hatchcover is provided with a hatchcover idler wheel, and an idler wheel moving rail is correspondingly arranged at the periphery of the hatchway; a first oil cylinder and a second oil cylinder which are provided with oil by a double oil cylinder hydraulic control device are connected between the installation seat and the turning cover; the lower ends of the first oil cylinder and the second oil cylinder are coaxially hinged to the installation seat, and the lower end parts of piston rods of the first oil cylinder and the second oil cylinder are respectively hinged with different connected parts on the turning cover so that the turning cover turns outwards or inwards under the matching action of the double oil cylinders. The device not only lowers the opening height of the hatchcover, but also has little occupation area of the opened hatchcover, compact structure and good use effect.

The invention discloses a layered water-taking water-temperature observation device of a reservoir stop log gate and an observation method of the same, which belong to the technical field of water resources and hydropower engineering. The device comprises a water inlet, wherein a trash rack, a stop log gate and an electricity-generation water inlet horn mouth section are disposed at the water inlet, the trash rack is located in front of the water inlet, the stop log gate is located in the water inlet, the electricity-generation water inlet horn mouth section is located on the downstream side of the water inlet, a before-dam water temperature and water level observation device is disposed on the upstream side of the water inlet, and an after-dam electricity-generation tail water water-temperature observation device is disposed on the downstream side. In the technical scheme, the stop log gate is disposed at the water inlet to realize layered water taking, reservoir surface water enters a water taking duct from the top of the stop log gate of the water inlet, and an opening height of the stop log gate is controlled according to changes of a reservoir water level, so that the water taking from the reservoir surface and electricity generation can be ensured, lower-layer water in a reservoir is avoided from flowing towards the downstream direction and generating harmful influences to a downstream ecological environment, unit independent water supply is realized, and running operations become flexible.

The invention provides an induction tail door closing device. The induction tail door closing device comprises an electric tail door control ECU and an induction device, wherein the induction device comprises an induction sensor and an induction ECU, the induction ECU comprises an induction chip and a master control MCU, the induction sensor is connected with the induction chip, and the master control MCU is connected with the electrical tail door control ECU. The structure of the induction tail door closing device is simple and feasible. A high automobile tail door still can be easily opened or closed by a short person. The opening height of the automobile tail door does not need to be set or adjusted according to the different heights of different people, the use of people with different heights is adapted, and the condition that when people with different heights use an automobile trunk, some people feel that the tail door is too low to open and hit but some people feel that the tail door is too high to open or close is avoided. Fully-automatic induction door opening or closing is realized. The problem of high manufacture cost resulting from the die manufacture and design requirement of the existing electric button for controlling the automatic opening and closing of the electric tail door is solved. The use effect is great.

A battery body (27) has positive and negative battery electrodes (29, 30), which are provided in two accommodation spaces (32, 33) surrounded by an insulating wall portion (27a) that is an outer wall thereof, and also has terminal insertion openings (32a, 33a) adapted to permit only battery terminals, which correspond to the battery electrodes (29, 30) accommodated in the accommodation spaces (32, 33), respectively, to be fitted thereto. Each of the battery terminals (24, 25) has a connecting flat plate portion (24a, 25a) that has a transversal section of a predetermined shape and can be fitted into a corresponding one of the terminal insertion opening (32a, 33a). One of the terminal insertion openings (32a) has a nearly rectangular opening having an opening width (a1), which is wider than an opening width (c1) of the other terminal insertion opening (33a), and also having an opening height (b1), which is lower than an opening height (d1) of the latter terminal insertion opening (33a).

The invention discloses a method for discriminating the blocking type of a window dam in a debris flow interception process and application thereof. According to the method, the blocking type of the window dam is discriminated according to the type of debris flow, the grain size d 95 of debris flow solid matter, the opening width b of the window dam, the opening height h of the window dam, the total area S0 of the cross sections of the openings of the window dam, the cross section area S below the effective height of the window dam within channel width. The method can be used for verifying the blocking type of the window dam or guiding the opening design of the window dam. Compared with the prior art, the opening width, the opening height and the total opening area are taken into consideration, the influences of the opening width, the opening height and the total opening area on the blocking type of the window dam are reflected completely, and the blocking type of the window dam can be distinguished reasonably. Further, the method for discriminating the blocking type of the window dam in the debris flow interception process supplies basis to window dam design and meets the actual engineering demands.

The invention relates to a method for preparing a silk material used for the reinforcement and protection of rotten silk art treasure. The method comprises the following steps: firstly, non-degummed mulberry silk fiber with a denier of 13 / 15D is selected, and subjected to package rewinding under a certain condition; secondly, the mulberry silk fiber is twisted to between 2 and 22T / cm; thirdly, the mulberry silk fiber is subjected to shaping in a steaming box at a temperature of between 30 and 70 DEG C for 20 to 90 minutes; fourthly, the mulberry silk fiber is subjected to warping and quilling; fifthly, under the conditions of a reed number of between 6 and 30, a shed opening height of between 0.2 and 0.6cm and warp gaiting tension of 50 and 150cN, the mulberry silk fiber is woven according to plain weave, wherein the warp density of textile fabric is between 130 and 310 / 10cm, and the weft density of textile fabric is between 150 and 350 / 10cm; sixthly, the obtained textile fabric is soaked in fresh water at a temperature of 40 and 100 DEG C for 10 to 60 minutes and subjected to tentering drying to obtain a finished product. The method has the advantages that chemical auxiliary agents are not used; and, the silk material prepared has the advantages of good transparency, softness and smoothness and proper rigidity, and is quite suitable for the reinforced protection of rotten silk art treasures.

The invention discloses a prediction method for a transient opening height of a one-way valve for a multiphase mixing transmission pump. The method comprises the following steps of (1) building a CFDtransient model of the opening height of the one-way valve under a frequency change oil-gas mixing transportation condition, and providing initial data for GPR experience modeling; (2) classifying M sets of samples provided by the CFD transient model, namely, classifying each set of CFD simulation data into L sample subsets; separately performing learning and training for each sample subset, and building GPR prediction sub-models of the transient opening height of the one-way valve; and (3) performing online assessment on the GPR prediction models and the CFD transient model, and selecting themost proper GPR and CFD models according to the online assessment, thereby realizing online and offline prediction of an input sample set defined in the specification.

The invention discloses a method and system for controlling a vehicle electric rear tail door and belongs to the technical field of vehicle electronics. The method comprises the steps that a vehicle-mounted terminal displays a setting interface and obtains the opening height, of the electric rear tail door of a vehicle, set in the setting interface by a user; the vehicle-mounted terminal sends the opening height to a PLGM through a controller local area network CAN bus; the PLGM receives the opening height through the CAN bus and stores the opening height; when the PLGM detects that the electric rear tail door is opened, the PLGM obtains the opening height; and according to the opening height, the PLGM controls the electric rear tail door to rises to the opening height. The system comprises the vehicle-mounted terminal and the electric rear tail door controller PLGM. According to the method and system, the vehicle-mounted terminal obtains the opening height, of the electric rear tail door, set by the user, and the PLGM controls the electric rear tail door to rises to the opening height, so that the efficiency of controlling the electric rear tail door is improved.

The invention relates to an automatic control device for canal discharge. The automatic control device is characterized in that a status display is arranged on a box body; an upper-half part of the box body is a semi-closed box body, and a gate at the lower-half part of the box body is embedded into a concave gate sliding chute and a bottom sealing groove; a lifting motor and a descending motor are fixed on a thickening steel plate at the top of the box body; one end of a steel cable is connected with the lifting motor, and bypasses a top plate pulley, a middle steel plate main pulley and a middle steel plate auxiliary pulley; the other end of the steel cable is connected with the descending motor; a gate opening / closing pivot and a gate motion stabilizing pivot are arranged in the middle of the gate and are positioned in a gate sliding stabilizing groove on a back plate of the box body; a controller with signal receiving and transmitting functions and a gate opening height sensor are arranged on the top thickening steel plate; and the controller is arranged on the back plate of the box body and is connected with the status display, the lifting motor and the descending motor. The automatic control device disclosed by the invention has the advantages of timely opening / closing the gate, accurately adjusting the gate height and calculating the canal discharge; and field irrigation can be controlled more accurately, and the utilization efficiency of agricultural water resources is effectively improved.

A feeder device for feeding a unit of media from a stack of media to a receiving apparatus is provided. The feeder device comprises a drive mechanism for driving the media in a feed direction through an opening defined by a gate apparatus. The opening extends from a first to a second edge of the gate apparatus and defines a fixed height greater than the thickness of the media. A flexible blade member is fixedly engaged with the gate apparatus at a fixed end and is cantilevered with respect to the gate apparatus. The blade member defines a length and extends from the first edge toward the second edge to reduce the opening height. The blade member is further configured to have an adjustable flexibility to allow the feeder device to feed media of varying thickness to the printing apparatus. An associated method is also provided.

The invention relates to a triple-spring safety valve, which solves the problem of poor reliability of an existing spring safety valve. The maximum rigidity of a spring of the triple-spring safety valve at the specified opening height is lambda=0.9 / hX(pi / 4Xd02pdr rhoh-pi / 4D2mps), wherein the h refers to the opening height mm of a valve clack, the do refers to the diameter mm of a flow channel, the Dm refers to the medium diameter mm of a sealing surface of the valve clack, the pdr refers to rated discharge pressure Mpa, the rho refers to the lift coefficient of the valve clack when the triple-spring safety valve is lifted to the h, and rho=Qs / pi / 4Xd02p. The spring parameter is lambda=Gd4 / 8D3n, wherein the G refers to shearing modulus, the d refers to the diameter of the spring, the D refers to the medium diameter of the spring, and the n refers to effective coil number. A valve body is made of WCB, CF8 and CF3M, a slope is manufactured on the inner side of a surfaced alloy ring of a valve seat, and an included angle between the slope and a center line is 30 degrees. The triple-spring safety valve has the advantages that standard internationalization, type serialization and specification universalization can be realized while opening, lifting, reseating and closing with fine sealing are completed in the same action, and the performance is extremely reliable.

The invention provides a sand making system using a high-frequency sieve under strong wind conditions. The sand making system comprises a dewatering sieve, a sand dust recovery station, a water tank, a slurry processing device, a finished product collecting device, a pisolite sieve, a fast sand dust separator and a sewage processing device. A sand making method for the sand making system adopts the following steps that: (1) stone dust features of stone used by rough material sources are analyzed; (2) the water spraying intensity and the specific installing position of a spraying pipe are determined; (3) the overflowing opening height of the fast sand dust separator is adjusted; (4) the hole diameter of a sieve net of the high-frequency sieve and the sewage discharging quantity of the slurry processing device are regulated; and (5) equipment is started for sand making. The sand making system and the sand making method have the advantages that through the modes of high-frequency sieve spraying, precipitation sand collection and overflow dust removal, the problem of conflict between dust extinguishing and screening percentage can be effectively solved; the dust-free production is realized; the operation environment is improved; and the occupational health harm caused by dust is avoided.

The invention belongs to the technical field of separation equipment and relates to an oil-water separation device. The main body of the oil-water separation device comprises an enclosed first tank, the top of the first tank is provided with an oil-water mixture inlet, several separator plates are arranged in the first tank and divides the first tank into several compartments, a liquid transport pipe is arranged between each two adjacent compartments and is used for communicating the two compartments. An output pipe communicated with the external environment is arranged in the last compartment. Inlets of the liquid transport pipes and the output pipe are close to the bottoms of the compartments. Outlets of the liquid transport pipes and the output pipe are close to the top of the first tank. The first compartment communicated with the oil-water mixture inlet is provided with a first oil outlet for oil discharge. The opening height of the first oil outlet is larger than the inlet height of the liquid transport pipe in the first compartment. The oil-water separation device has a simple design, a low cost, good oil-water separation effects and high efficiency, is convenient for waste oil centralized recovery and water recovery and recycle, and can be operated conveniently and fast. The oil-water separation device realizes zero discharge of COD in water.

The invention discloses a control system for surface air speed of a fume hood. The control system comprises a displacement sensor, a PID (proportion, integration and differentiation) controller, an air valve driver, a speed reducer, a butterfly valve, a micro-control unit, an input keyboard, a display device and a warning device, electric signals inputted by the displacement sensor are compared with preset surface air speed parameters corresponding to the opening height of a surface window, required air exhaust speed data for maintaining the negative pressure in the fume hood are generated, transmitted to the micro-control unit and converted into control signals, the control signals are transmitted to a control signal input end of the air valve driver via a signal output end, and the air valve driver drives the butterfly valve via the speed reducer to regulate the exhaust air rate in an exhaust pipeline. By the aid of the control system, the opening size of the surface window and the surface air inlet speed are regulated in a linkage manner. The invention further discloses a control method implemented by the aid of the control system.

The invention discloses a small direct-driven type all-metal sealing piezoelectric proportional valve. A piezoelectric direct-driven mode is adopted, an amplified structure does not need to be adopted, and accordingly the advantages, of a piezoelectric actuator, of large output force and high positioning precision are guaranteed; the positioning precision of the piezoelectric actuator can reach an nm order, and compared with other valves, the proportional valve designed in this way can be used for performing high-precision and high-resolution proportional flow control within a wide pressure range; and in addition, since the direct-driven mode is adopted, the seal passing diameter can also be increased, accordingly the required opening height is decreased so as to further decrease the length of the piezoelectric actuator, and miniaturization of the valve is achieved.

An automatic stovetop fire suppressor providing a gradual release of a fire suppressing agent in a desired distribution pattern and method of gradual and spatial agent release are provided herein. A plastic cone shaped lid seals on the bottom of a can and forms a closed container. The closed container is filled with a fire suppressing agent. An initiator charge breaks a designed breaking point of a reduced horizontal cross sectional area when fuse activated. The bottom lid drops down exposing a radial opening. Fire suppressing agent flows out of the radial opening, suppressing a stovetop fire with minimal or no splashing of cooking oil. An initiator housing is affixed to a top wall of the can and serves as the welding point for securing the plastic lid. A travel limiting member attached to the bottom lid catches on a shoulder of the initiator housing to limit the radial opening height.

The invention provides a stator stamping and a motor. The stator stamping is provided with an annular yoke and a plurality of teeth, the teeth are outwardly extended from the yoke along the radial direction of the stator stamping, a notch is formed between each two neighboring teeth, moreover, the middle of the stator stamping is provided with an inner round hole, wherein the notches are shallow notches and deep notches, which are arranged alternately, and the opening height of the deep notch is greater than the total height of the shallow notch. The motor is provided with a stator and a rotor, the stator is provided with a stator core made of the laminated stator stampings and coils wound on the stator core, the coils are a plurality of inner coils and a plurality of outer coils, each inner coil is wound between two deep notches, and each outer coil is wound between two shallow notches. The invention can decrease the difficulty of the coil-winding process; moreover, the coils are not overlapped spatially, so that the requirement on the insulation of the coils is decreased, and thereby the production cost of the motor is reduced; moreover, when the motor operates, the magnetic density is more uniform, and operation is more stable.

The invention relates to an intelligent garbage can. The intelligent garbage can comprises a garbage can body and further comprises a water storage tank and a cigarette end collecting box; the water storage tank is arranged below the garbage can body, the cigarette end collecting box is arranged on one side of the garbage can body and is communicated with the water storage tank; a plurality of drain holes are formed in the bottom part of the garbage can body and are communicated with the garbage can body and a drain tank; an opening is formed in the top part of the cigarette end collecting box, a turnover cover is arranged in a box body, a pipeline communicated with the water storage tank is arranged at the bottom part of the box body; the pipeline extends to the bottom part of the water storage tank, the opening leading to the cigarette end collecting box is higher than the bottom part of the water storage tank; the cigarette end collecting box is further provided with an air exhausting device, wherein the air exhausting device in the cigarette end collecting box forms the negative pressure in the cigarette end collecting box, the waste water is absorbed from the water storage tank and extinguishes the fire of a cigarette end, even if no waste water exists, the cigarette end collecting box forms a near vacuum space, the cigarette end is also easily extinguished, and the intelligent garbage can is simple in structure, is environmentally friendly, and is effective.

The invention discloses an eye opening and closing detection method of an infrared image. The method includes the steps of S1, acquiring a face infrared image, and acquiring positions of eyes using Adaboost; S2, performing Gamma correction on the eye image to overcome the lighting influence; S3, removing shadow interference caused by non-uniform lighting by using multi-scale Retinex transform; S4, binarizing the image by an iterative threshold method so as to acquire the eye region more accurately; and S5, judging the state of the eyes by a judgment method fused with information on the opening angle of corners of the eyes and the opening height of the eyes.

An automatic wheel hub cover opening height detection mechanism is composed of a linear encoder (1), an air cylinder (2), a guide rail (3), a stand column (12), a base (13), a sliding block (14), a lifting movable base (15), an air cylinder connecting plate (16), a detection head (17), a detection head installation plate (18), a detection head lifting guiding block (19) and a locking screw rod (20). The automatic wheel hub cover opening height detection mechanism is characterized in that the detection head lifting guiding block (19) is arranged on the detection head installation plate (18), the linear encoder (1) is connected to the upper portion of the detection head lifting guiding block (19), the detection head (17) is arranged at the lower portion of the detection head lifting guiding block (19), and the detection head (17) can move up and down along with the detection head lifting guiding block (19). According to the automatic wheel hub cover opening height detection mechanism, the air cylinder pushes the detection head to descend; after the detection head touches the wheel hub cover opening height, the high-precision linear encoder detects stroke data, and the wheel hub cover opening height is obtained through calculation of the stroke data.

The invention discloses a lifting mechanism for a valve plug of a solenoid valve. The lifting mechanism comprises a supporting plate arranged above a valve cap, wherein the upper end of a lifting rod of a main valve plug penetrates through the supporting plate; a rack extending along the length direction of the lifting rod is arranged on the lifting rod; a connector I is arranged on the upper surface of the supporting plate; a transmission shaft is rotatably arranged on the connector I; a gear which is engaged with the rack is arranged on one end of the transmission shaft; a ratchet wheel is arranged on the other end of the transmission shaft; the lifting rod is vertically arranged on the upper surface of the supporting plate; a long lever which is horizontally distributed is rotatably connected on the upper end of the supporting rod; the connection point of the supporting rod and the long lever deviates from the centre in the length direction of the long lever; the long lever is arranged above the ratchet wheel; and a pawl which is matched with the ratchet wheel is fixedly arranged on the long lever. The invention further discloses a pilot-operated type solenoid valve for a gas well wellhead adopting the valve plug lifting mechanism. The pilot-operated type solenoid valve for the gas well wellhead and the valve plug lifting mechanism can greatly increase the opening height of the solenoid valve main valve plug, increases the yield and prevents throttling.