191results about How to "Low working environment requirements" patented technology

The invention relates to the technical field of gas detection, and in particular relates to an MEMS gas sensor. The MEMS gas sensor comprises a monocrystalline silicon substrate, a porous silicon layer which is formed on the upper surface of the monocrystalline silicon substrate and has thickness downwards, a heat insulation trough formed on the lower surface of the monocrystalline silicon substrate in an inverse manner, a lower insulation layer, a heating layer, an upper insulation layer and a gas sensitive layer, wherein the bottom surface of the heat insulation trough is positioned just under the porous silicon layer; the heat insulation trough comprises one or multiple trench groups; the lower insulation layer covers the porous silicon layer and the upper surface of the monocrystalline silicon substrate and comprises a first silicon dioxide layer, a second silicon dioxide layer and a silicon nitride layer from bottom to top in sequence; the heating layer, the upper insulation layer and the gas sensitive layer are arranged above the lower insulation layer. The invention also correspondingly discloses a manufacturing method of the MEMS gas sensor. By virtue of the structures of porous silicon and the heat insulation trough, the heat insulation effect is enhanced; the lower insulation layer effectively prevents the heat insulation layer warping to break away from the heating layer at high temperature; meanwhile, under the supporting of the porous silicon layer, deformation and cracks, which are caused by non-uniform stress, of the lower insulation layer are prevented, and thus the service life of the gas sensor is prolonged.

The invention relates to a hydraulic (wind) turbine of door frame type, which has a novel design. The vanes of the turbine are designed like doors, grouped into a plurality of groups and arranged on the work arm, and the vanes are capable of closing and opening; thus, when the vanes of the hydraulic (wind) turbine rotate downstream for half turn, the gate leaf remains to be in an off state, and water (wind) utilization ratio is the greatest; whereas, when in the half turn of the rotation against the current, the gate leaf opens, and water (wind) can pass through smoothly with the lest resistance; the contradiction that the gate leaf of both sides of the axle can not rotate owing to being stressed simultaneously is solved successfully, and the working efficiency is also improved. The design of the power can be flexible, thus the practicability is high. The turbine can be used for seizing water power resources of rivers and ocean current, and can be also used for seizing wind energy resources; no matter how the direction of water (wind) changes, resources can be seized and used by the turbine. The turbine has the advantages of simple structure, light weight and wide application range. At the present when the energy demand is great, the hydraulic (wind) turbine of door frame type has broad prospect.

The invention discloses a full-tensor magnetic field gradiometer based on the giant magnetic impedance effect. The full-tensor magnetic field gradiometer comprises an X-Y-direction gradiometer body, a Z-direction gradiometer body and signal leads. The X-Y-direction gradiometer body comprises a cross-shaped substrate and a giant magnetic impedance thin film, the Z-direction gradiometer body comprises a rectangular substrate and a giant magnetic impedance thin film, a junction point at the input end and a junction point at the output end of an electric bridge are connected with the signal leads, and the signal leads are arrayed symmetric with the geometric center of the whole gradiometer as the three-dimensional center. The full-tensor magnetic field gradiometer has the advantages of being high in accuracy, minimized, low in cost, wide in frequency response, rich in information and the like. Due to the design of preparing a three-dimensional structure through planar thin films, the problem of space consistency of the full-tensor magnetic field gradiometer based on the giant magnetic impedance thin films is solved, and the magnetic field gradient measuring sensor with the size at the chip level is designed for the first time.

The invention discloses a device and method for testing a road surface peak attachment coefficient and belongs to the technical field of vehicle control. The method comprises the steps that 1, the car mass center accelerated speed ax, car speed v, wheel rotating speed wi, wheel cylinder pressure pi and driving torque Ti obtained by wheels are collected; 2, according to the accelerated speed ax, the state of a car is judged, the longitudinal force of the wheels is obtained, and the driving force or braking force of the wheels is calculated; 3, the slip rate of the wheels of the car is calculated according to car speed v and wheel rotating speed wi information; 4, the normal load of the wheels is calculated according to the accelerated speed ax; 5, the attachment coefficient (please see the formula in the description) is calculated according to the longitudinal force and normal load of the wheels; 6, according to the slip rate and attachment coefficient of the wheels, two approximate road surfaces R1 and R2 are selected from prestored calibration curves, and wheel attachment coefficients (please see the formula in the description) corresponding to the two approximate road surfaces and road surface peak coefficients mu1 and mu2 are obtained; 7, the approximation degree lambda of the approximate road surfaces is calculated; 8, the peak attachment coefficient mu max of the current road surface is calculated. The device and method are simple and effective, wide in application range and high in efficiency, and vehicles can be controlled well.

The invention provides a detecting system for an incremental encoder. The detecting system comprises an upper computer, a controller, a subdivision driver, a stepping motor, a speed reducing device and an encoder to be detected. The upper computer is used for transmitting a signal including angular displacement to the controller, comparing the angular displacement and actual rotary angular displacement of the encoder to be detected and judging the accuracy of the encoder to be detected. The controller is used for converting the angular displacement into the number n of corresponding pulses, transmitting a pulse signal to the subdivision driver and transmitting the signal including the angular displacement to the upper computer. The subdivision driver is used for performing microstep driving, generating pulse current and transmitting the pulse current to the stepping motor. The stepping motor is used for performing rotation according to received pulse current and outputting torque to drive the speed reducing device to rotate. The speed reducing device is used for driving the encoder to be detected to rotate. The encoder to be detected is used for converting self angular displacement in actual rotation into the number of the pulses and feeding back the number of the pulses to the controller. Compared with the prior art, the utilization rate is improved.

The invention provides a wind generating set barring assembly which at least comprises a support beam, a first hydraulic cylinder, a first connection base and a second connection base. The support beam is provided with a connection portion used for being connected with a non-rotating part of a wind generator and a connection portion used for being fixedly connected with the first connection base. The first connection base is used for connecting one end of the first hydraulic cylinder to the support beam, and the second connection base is used for connecting the other end of the hydraulic cylinder to a rotor of the wind generator. The assembly is at least provided with a first state and a second state. The support beam, the first hydraulic cylinder, the first connection base and the second connection base are arranged in a separation mode under the first state. Under the second state, one end of the first hydraulic cylinder is connected onto the support beam through the first connection base, and the other end of the first hydraulic cylinder is connected onto the second connection base. A barring method is further provided. The assembly is simple in structure, low in cost, capable of being used repeatedly and good in economy.

The invention relates to a vacuum welding device and method, in particular to a low-voltage high-current-beam electron beam vacuum welding device and method. The low-voltage high-current-beam electron beam vacuum welding device and method are used for solving the problems that in the prior art, preparation before electron beam welding is complex and the operating cost is high. The low-voltage high-current-beam electron beam vacuum welding device comprises a hollow cathode, an anode, an accelerating electrode, an axial constraint magnetic field, a focusing mechanism, a discharging power supply, an accelerating power supply, a vacuum chamber, a welding platform and an insulating sleeve, wherein the axial constraint magnetic field, the insulating sleeve, the accelerating electrode, the focusing mechanism and the welding platform are arranged in the vacuum chamber in sequence from top to bottom, the hollow cathode is inserted into the axial constraint magnetic field, the anode is arranged between the hollow cathode and the accelerating electrode and located under the hollow cathode, a workpiece is placed on the working platform, the negative electrode of the discharging power supply is connected with the hollow cathode, the positive electrode of the discharging power supply and the negative electrode of the accelerating power supply are connected with the anode, and the accelerating power supply is connected with the accelerating electrode. The low-voltage high-current-beam electron beam vacuum welding device and method are used in the welding field.

The invention discloses a novel electric control cabinet comprising a cabinet door and a cabinet body. The cabinet body is of an enclosed structure, a partition board is vertically arranged in the cabinet body, and inner space of the cabinet body is divided into an equipment working region and a medium cooling and drying region by the partition board. An inner circulating fan is mounted at the upper end of the partition board, air flows from the equipment working region to the medium cooling and drying region, and a cool air inlet is arranged below the partition board. A cooling component is arranged on the outer wall of the cabinet body close to one side of the medium cooling and drying region. A heat-absorbing component is arranged in the medium cooling and drying region. The heat-absorbing component is connected with a compressor through a connecting pipeline, the compressor is connected with the cooling component through the connecting pipeline, and the cooling component is connected with the heat-absorbing component through the pipeline. The novel electric control cabinet has the advantages of constant temperature, cleanness, dryness and low noise; and working condition requirements on the electric control cabinet are reduced, working cost for cooling apparatus and equipment is saved, and energy consumption is saved.

The invention discloses a measurement device for the swing angle of a multi-sling bridge crane. The multi-sling bridge crane comprises a bridge crane trolley provided with first lifting ropes. The measurement device for the swing angle of the multi-sling bridge crane is characterized in that the measurement device comprises a swing angle calculation and control computer, a fan-shaped plane infrared light emitter, a swing angle detection camera, lifting rope vertex markers and a video image processor; the fan-shaped plane infrared light emitter is used for emitting fan-shaped infrared light, and the light encounters one or more of the first lifting ropes, so that light spots are left; the swing angle detection camera is used for shooting images of the first lifting ropes; the video image processor is used for receiving the images of the first lifting ropes and finding the positions of the light spots and the lifting rope vertex markers; the swing angle calculation and control computer, the fan-shaped plane infrared light emitter and the video image processor are arranged on a second lifting rope, and the second lifting rope moves along with moving of the bridge crane trolley; and the swing angle calculation and control computer works out the position coordinates of the light spots and the lifting rope vertex markers, and thus a swing angle value is obtained. By adoption of the measurement device for the swing angle of the multi-sling bridge crane, the swing angle of the bridge crane can be detected accurately, and the measurement device has the advantages of being low in cost and high in antijamming capability.

The technical scheme of the invention relates to the field of spectrum, in particular to a method for conversion of spectrum into chromaticity, which comprises the steps of: collection and digital processing of a spectral image; preprocessing of the spectral image with a computer; identification of the horizontal ordinate, vertical ordinate and spectral curve in the spectral image via the computer, and extraction of spectral data from the spectral image; display of the spectral data on the computer, and drawing of a spectral curve according to the extracted data; approximation and interpolation of the spectral data; and calculation of the values of X, Y and Z via discrete summation according to the product of the spectral intensity and the tristimulus value, and display of the chromaticity (x and y) on the computer. By adopting the method, the defects of the prior art that the spectral curve cannot be identified rapidly, the spectral data cannot be rapidly extracted and automatically converted into the chromaticity can be overcome.

The invention provides a photonic crystal power generating device based on a longitudinal vibration band gap. The photonic crystal power generating device comprises a main beam and branched beams, wherein the strut beams are provided with piezoelectric materials and mass blocks for forming local-area vibrator units, and at least two rows of local-area vibrator units with the same structure are arranged on the main beam for forming a photonic crystal structure, the surface of each piezoelectric material on each local-area vibrator unit is vertical to the axis of the main beam, the structure that the at least two rows of local-area vibrator units with the same structure are arranged on the main beam is characterized in that the local-area vibrator units in the same row are distributed at equal intervals, the distance between the local-area vibrator units in each row are equal, and the local-area vibrator units of each row on the cross section of the main beam are distributed at equal intervals. Wideband efficient power generation in a vibrating environment is realized by adopting a photonic crystal technology. The photonic crystal power generating device is simple in integral structure and convenient to manufacture, and has lower requirement on the working environment. The longitudinal vibration power generation frequency band of a piezoelectric vibrating device is effectively widened, and active control is not needed. The photonic crystal power generating device can be used for energy supply of micro-electronics products, such as a wireless sensor.

The invention provides flexible cable artificial muscle. The flexible cable artificial muscle comprises a frame, a flexible cable driving device, a tension sensor and an encoder, wherein the flexible cable driving device comprises a motor, a first flexible cable, a first spring, a second spring, a spring parallel connection device and a second flexible cable, the upper end of the first spring and the upper end of the second spring are connected in parallel through the spring parallel connection device, and the lower end of the second spring is installed on the frame through a supporting plate; the motor is fixed to the frame, a flexible cable traction wheel is installed on an output shaft of the motor, one end of the first flexible cable is fixed to the flexible cable traction wheel, and the other end of the first flexible cable is connected with the lower end of the first spring; one end of the second flexible cable is connected with the upper end of the first spring, the tension sensor is installed on the frame, the second flexible cable penetrates through the tension sensor and makes contact with the tension sensor, and the encoder is installed on the motor. The flexible cable artificial muscle is simple in structure, light, easy to control, high in precision, high in flexibility, short in movement latent period, stable in performance and high in muscle bionic degree.

The invention discloses a portable pipeline interior washing device. The portable pipeline interior washing device comprises a first power working device, a second power working device, a brush head used for pipe interior washing and two sections of steel wire ropes connected with the two sides of the brush head, wherein the first power working device and the second power working device are arranged at the two ends of a pipeline; one ends of the two sections of steel wire ropes are connected to the first power working device and the second power working device, and the other ends of the two sections of steel wire ropes are connected with the two ends of the brush head; the structure of the first power working device and the structure of the second power working device are the same, the steel wire ropes are wound through a gear motor, the brush head is pulled to do back-and-forth motion in the pipeline, and therefore the pipeline washing work is done; and the installation positions of a brush bristle barrel and a brush bristle body are changed so that pipelines with different diameters can be washed. The portable pipeline interior washing device is simple in structure, easy to disassemble and maintain and low in environmental requirement; the brush head is adopted for washing, damage to a pipeline inner bore is avoided, and meanwhile washing of the pipelines with different diameters can be completed.

The invention relates to a pollution-free gas drying agent which has high dehumidifying efficiency, slow dissolving speed and no pollution after dissolution, and can be directly dissolved in water to be exhausted to the environment, and a drying method thereof. The method comprises the steps that: wet air enters through an inlet which is positioned in the center of the bottom of a dryer container, so that the compressed air is uniformly distributed and flows upwards through the uniform diversion of a splitter plate, and the air is fully contacted with a moisture-absorbing agent layer; the wetair is firstly contacted with the moisture-absorbing agent layer in a reaction zone, and the moisture-absorbing agent absorbs plenty of water in the wet air, so that the moisture-absorbing agent undergoes chemical reaction; the wet air enters a drying zone of the moisture-absorbing agent layer, and the moisture-absorbing agent further dries the wet air, so that the dew point of the wet air reaches the required dew point; and finally, the fully dried compressed air is exhausted through an air outlet at the upper end of the container by passing through a preparation area of the moisture-absorbing agent. The dryer of the invention overcomes the defect that the conventional dryer has complex structure, high energy consumption, and environmental pollution, and has the advantages of stable performance, low energy consumption, low cost, no pollution, and low requirement on the working environment.

The invention provides a full-field lens assembling method which comprises the following steps: measuring wavefront of a measured lens at different full-field positions; processing the information ofthe wavefront at different positions to obtain various aberrations; and integrating the obtained aberrations, and adjusting the assembling position of the measured lens according to the integrated result. The invention further provides a full-field lens assembling device for realizing the method. The assembling device comprises a light source, a reticle, a telescope system and a wavefront sensor,wherein the wavefront sensor is used for receiving wavefront formed by parallel beams exiting from the telescope system and measuring the actual wavefront information; and the wavefront comprises an on-axis wavefront and an off-axis wavefront, and is used for adjusting the measured lens by comprehensively considering the full-field wavefont condition. The assembly mode for wavefront measurement replaces the traditional MTF-based assembling manner, the assembling accuracy and efficiency are improved, and large-scale production of a high-performance lens is realized.

The invention aims at providing a local resonance type photonic crystal vibration damping gear. The local resonance type photonic crystal vibration damping gear comprises a gear ring and a wheel hub, local resonance type photonic crystal rods are mounted on an arm of a wheel, two ends of each local resonance type photonic crystal rod are connected with the gear ring and the wheel hub in an interference manner, a welded manner or a screw fastening manner, the local resonance type photonic crystal rods comprise support rods, cladding layers and vibrators, and the cladding layers and the vibrators are mounted on the support rods from inside to outside. The local resonance type photonic crystal vibration damping gear is simple in structure and convenient to manufacture, is enabled to have good damping and noise reducing effects in a low and medium frequency area by converting torsional waves of the gear into bending waves of the support rods, is reliable to use and low in requirements on working environments, and can be used for reducing vibrating noise of a gear box under a low-and-medium-load working condition, improving working environments of workers and the like.

The invention provides a continuously moving-type control rod hydraulic drive device of a nuclear reactor, which comprises a drive cylinder barrel, an internal sleeve, a runner sleeve, a lower end cover, a piston, a hollow piston rod, a servo tube, a leading screw, a shift-stopping assembly and a power source (a motor and a water pump). The control rod hydraulic drive device takes a refrigerant (water) in a pressure container of the nuclear reactor as a working substance, and the refrigerant (water) flows along a flowing channel formed internally therein after being pressurized by a water pump; the motor and the auxiliary moving servo tube of screw transmission are used for changing the width of a changeable choke formed between the end surface of the servo tube and the inner bottom surface of the hollow piston rod so as to change the pressure at two sides of the piston and drag a control rod fixedly connected with the outer end of the hollow piston rod to move. The control rod hydraulic drive device has the advantages that since no electron device required for solenoid drive exists, the requirement on working environment is not high; the continuous movement of the control rod can be realized; the drive device has simple structure and convenient processing and is easy for operation and programmed control; the limitation change range of the pressure and flow of working water is relatively wide, and the drive device has good safety and stability.

The invention relates to the field of silica-based micro-hotplates, and discloses an MEMS (micro electro mechanical system) silica-based micro-hotplate provided with thermal insulation channels and a processing method of the MEMS silica-based micro-hotplate. The MEMS silica-based micro-hotplate comprises a monocrystal silicon substrate, the thermal insulation channels, a lower insulation layer, a heating layer and an upper insulation layer, wherein one or more groups of thermal insulation channels with certain depths are formed in the upper surface of the monocrystal silicon substrate, and each group of channels comprises a plurality of parallel straight channels; the thermal insulation channels and the upper surface of the monocrystal silicon substrate are covered with the lower insulation layer; and the heating layer and the upper insulation layer are arranged above the lower insulation layer. According to the micro-hotplate, a film on the lower insulation layer as well as the heating layer and the upper insulation layer above the film on the lower insulation layer can be stably supported by the thermal insulation channels, and the heating layer is prevented from falling off due to the fact that the lower insulation layer deforms and warps during high-temperature work of a device; and meanwhile, the surfaces of the thermal insulation channels are covered with the silicon dioxide film, the silicon dioxide film can have a better thermal insulation effect, the detection sensitivity of the micro-hotplate is increased, and the service life is prolonged.

The invention discloses a floor turnover machine which comprises a frame body, wherein at least two belt wheels are mounted on the frame body in parallel; a belt is arranged on each belt wheel and is used for conveying floors; driving blocks are arranged on each belt at a certain distance; a floor turning device is arranged on the frame body and is positioned above the belts; the floor turning device at least comprises two floor turning grabbing hooks; the floor turning grabbing hooks control to turn over the floor by an air cylinder; the floor on the belt passes through a sensor before reaching the turning device; after the sensor receives signals transmitted by the floor, the signals are transmitted to a PLC (Programmable Logic Controller); the PLC filters the signals and feeds the spaced signals to the air cylinder, so that the air cylinder controls the floor turning grabbing hooks to turn the floor. According to the floor turnover machine disclosed by the invention, the automation of floor turning is realized, so that a large amount of human resources are saved; besides, the working efficiency is greatly improved.

The invention provides a generalized photonic crystal acoustic shield which comprises a generalized photonic crystal column shell and a generalized photonic crystal semispherical shell connected with the generalized photonic crystal column shell. An annular boss is arranged at the bottom end of the generalized photonic crystal column shell, threaded holes are formed in the annular boss in the circumferential direction, the annular boss is connected with a base, and the generalized photonic crystal column shell and the generalized photonic crystal semispherical shell are at least provided with two cycle components from inside to outside. Each cycle component is composed of a nonmetal layer and a metal layer in sequence from inside to outside, wherein the nonmetal layer and the metal layer are attached to each other. The cycle components are attached mutually. The generalized photonic crystal acoustic shield has the advantages of being high in sound insulation, easy to mount, demount and transport, low in design and manufacturing cost and the like, and the generalized photonic crystal acoustic shield has the good vibration reduction effect on vibration within a band gap range.

The invention discloses a path planning method, a vehicle and a computer readable medium. The path planning method is applied to automatic driving of the vehicle. The path planning method comprises the following steps: obtaining a preprocessing result corresponding to preset request data; obtaining coarse search data of preset planning data according to the preprocessing result; and performing path optimization on the coarse search data to realize path planning. According to the method, a steering switching penalty term and a steering penalty term which are added in a traditional hybrid A* algorithm are improved, and an RS curve heuristic algorithm is adopted, so that extremely high solving capacity is achieved, and the calculation efficiency is improved; meanwhile, it is guaranteed that the planning result can meet the kinematics constraint of the vehicle in the optimization process of the rough search result, the difference of vehicle response characteristics in different full-load and no-load states and the response characteristics of an executing mechanism of a mining dump vehicle are fully considered, and the method is more suitable for a real application scene; and the requirement on the working environment is low, and the adaptability is higher.

The invention provides an all-inorganic light-emitting device based on a perovskite thin film and a preparation method thereof, and belongs to the technical field of semiconductor light-emitting devices. The all-inorganic light-emitting device is composed of an ITO glass substrate, a ZnO electron transmission layer, an inorganic perovskite CsPbX3 thin film light-emitting layer, an NiO hole transmission layer and an Au and Al anode electrode layer which are laminated in turn from the bottom to the top, wherein the ZnO electron transmission layer is prepared on the ITO conductive film of the ITOglass substrate, the ITO conductive film acts as a cathode electrode layer, and X is Cl, Br or I element. The surface of the perovskite CsPbX3 thin film is flat without pinhole, and the grain size issmall and efficient radiation composite luminescence can be easily realized so that the luminescence purity is high and the luminescence range is adjustable by adjusting and controlling the doping proportion of the halogen atoms. The inorganic material ZnO / NiO of stable property is used as the electron / hole transmission layer of the device so that the requirement of the working environment of thedevice is ensured to be low and the performance is stable.

The invention belongs to the technical field of automation engineering and relates to a capsule robot in a three-dimensional closed unstructured space and a relative positioning method of an object tobe tested. The method comprises wirelessly transmitting real-time images obtained when a capsule robot is hovering at spot and is subjected to attitude adjustment to a human-computer interaction interface, carrying out image processing on the acquired images to identify and extract target feature points, and transforming a distance between the object area to a camera into a distance between the optic center of the camera to a specific feature point according to a monocular vision ranging principle. The method is a positioning method for determining the positions of the capsule robot and the object to be tested relative to the reference position in the area to be detected through changing a magnetic vector axis direction to drive a capsule camera to carry out feature target search in the area to be detected in situ, determining a spatial distance of the capsule robot and the object to be tested relative to the reference position according to the camera images, combining pitch angle andside swing angle information of the capsule robot when acquiring the target features in two processes and using the spatial geometric relationship of the capsule robot and the object to be tested relative to the reference positions.

The invention discloses a bag cultured edible fungus liquid spawn full automatic inoculation machine and an operation process thereof, which is mainly used in the automatic inoculation production of edible fungus liquid spawn. The bag cultured edible fungus liquid spawn full automatic inoculation machine comprises a roller conveyor, an inoculation purification working cavity, a to-be-inoculated cultivation bag frame input buffer area, a double station multipoint automatic inoculation sealing part, an inoculated cultivation bag frame output buffer area, an automatic controller and the like; and can full-automatically accomplish operations of inoculation work environment purification, cultivation bag frame input and output, cultivation bag automatic quantitative inoculation and seal and the like. The bag cultured edible fungus liquid spawn full automatic inoculation machine of the invention has high degree of automation, is unlikely to generate pollution, has greatly reduced requirement on the machine sterile work environment, has simple and compact structure, is suitable for batch inoculation productions of the masses of farmers and medium-sized and small enterprises, and has great popularization and application value.

The invention discloses a lens diopter Moire measuring device and a measuring method based on the device. The measuring device comprises a light source, a beam expanding lens, a diopter compensating lens, a first optical grating, a second optical grating, a strip receiving unit, a strip collecting unit and a strip analyzing unit. The measuring method comprises steps of measuring device adjustment, image acquisition and image processing. In the measuring device, a semiconductor laser with a larger divergence angle outputs the light source in a manner of optical coupling, thereby improving quality of optical beams. The measuring device is simple in structure, lower in cost, firmer and simpler to operate and maintain, and requires less on working environment. In the measuring method, the lens diopter compensating mechanism is added in front of a to-be-measured lens, so while the identification precision of Moire strips is ensured, diopter measuring range of the measuring device is extended.

The invention discloses a precise rotary table bearing with time grating detection and control, which comprises a precise rotary table. The precise rotary table consists of a second moving coil (1), a static coil (3), a first moving coil (4), a first group of cylindrical rollers (5), a second groups of cylindrical rollers (6) and a third groups of cylindrical rollers (8), wherein the second moving coil is installed on the upper end surface of the first moving coil, the static coil is installed among the lower end surface of the second moving coil, the thrust rolling track surface of the first moving coil and the external diameter rolling track of the first coil, the first groups of cylindrical rollers are installed between the lower end surface of the static coil and the thrust rolling track surface of the first moving coil, the second groups of cylindrical rollers are installed between the external diameter rolling track of the first coil and an inner diameter of the static coil, the third groups of cylindrical rollers are installed between the upper end surface of the static coil and the lower end surface of the second moving coil, and division teeth are arranged on the external circle of the second moving coil. The upper end surface of the static coil is provided with a time grating sensor (2) which transmits detected clock pulse signals to a microprocessor, so that high-precision detection, control and positioning for the precise rotary table are achieved through a control system, and rotating angles or moving radians of the precise rotary table can be detected and controlled in time.

This invention discloses optical s / n ratio monitor method of WDM and its device relating to an optical s / n ratio monitor technology of WDM and OADM transmission system. The device has an independent type, a type of wave synthesizer composed of signals, noise separation / noise filter module, WDM channel optical power monitor, photoelectric detecting diode / log amplified circuit, monolithic device and its data collection interface, optical coupler, an optical divider, a OADM and a optical synthesizer. The signal, noise separation / noise filter module in types of front end, rear mount and parallel is composed of a film optical filter plate / fiber grating filter.

The invention discloses a floor turnover device for wood floor processing. The floor turnover device comprises a plank feeding mechanism (2) and a plank discharging mechanism (7) symmetric with the plank feeding mechanism (2). A transmission shaft (11) is arranged between the plank feeding mechanism (2) and the plank discharging mechanism (7). The two ends of the transmission shaft (11) are provided with rotary discs (5). A plurality of supporting rods (4) are evenly distributed on each rotary disc (5) in the circumferential direction. A driven gear (6) is disposed at one end of the transmission shaft (11) and connected with a driving gear (8) through a chain (9). The driving gear (8) is arranged on a drive motor (10). By means of the floor turnover device for wood floor processing, floors can be automatically turned over, and a large number of human resources are saved; meanwhile work efficiency is substantially improved.

The invention relates to a biped walking movement mechanism which comprises a static platform (C), a movable platform (F), two connecting rods (B and D), two push rods (A and E) and eight cardan joints (G, H, I, J, K, L, M and N), wherein the movable platform and the static platform are connected with the connecting rods and the push rods through the cardan joints, and the connecting rods are mutually parallel to the push rods. Under the driving of a motor (34), the mechanism can realize that two movement platforms alternately move ahead up and down. Under the driving of a motor (61), the mechanism can realize transverse movement. When the two push rods extend or shorten at the same time, the movement platform in the air can rotate around a self rotary shaft. The mechanism can realize three degrees of freedom of movement and a function of detecting posture adjustment, solves the problem that a simple four-rod movement mechanism cannot realize a function of direction-changed movement, also avoids the condition that the motors are loaded into the two movement platforms at the same time, and therefore achieves the effect of saving space.

The invention discloses a direct current controlled underwater test tree. The direct current controlled underwater test tree mainly comprises two parts, namely, a connector and a safety valve, whereinthe connector consists of a movable pushing ring, a ball locking mechanism, a cable channel, a wet connector and a hollow shaft motor; and the safety valve consists of a movable pushing ring, a hollow shaft motor, a cable channel, a ball valve mechanism, a gear-rack device and a buffering device. The connector controls the ball locking mechanism thereof to work through the hollow shaft motor so as to realize the disconnection or connection of a test tubular pipe; and two ball valves are distributed up and down in the safety valve and are both controlled to rotate by the cooperation of the hollow shaft motor and a gear-rack so as to realize blocking, shearing or starting. According to the direct current controlled underwater test tree, the control of the connector and the safety valve in the underwater test tree is realized through the hollow shaft motor; the overall control and response speed is improved; the disadvantage of hydraulic control is overcome; the requirement on the safetycontrol of the tubular pipe of deep water oil and gas testing operation is met; and the safety of operating ship, personnel, equipment and environment in an emergency situation is ensured.