4655results about How to "No maintenance" patented technology

The invention provides a selective laser melting forming device of a medical magnesium alloy metal part, which comprises a control device, a powder delivering and spreading device, a laser transmission mechanism, an air purification device and a closed forming chamber, wherein the powder delivering and spreading device comprises a hopper and powder spreading brushes arranged on two sides below the hopper, the upper part of the hopper is arranged in a way of corresponding to a feeding opening on the upper part of the forming chamber, and the lower parts of the powder spreading brushes horizontally correspond to the upper surface of a forming cylinder; the laser transmission mechanism is arranged outside and above the forming chamber and is arranged in a way of corresponding to the forming cylinder; the side wall of the forming chamber is provided with an air inlet and an air outlet, and the air purification device is connected with the air inlet and the air outlet respectively; and the control device is connected with the powder delivering and spreading device, the laser transmission mechanism, the forming cylinder and the air purification device respectively. The invention also provides a selective laser melting forming method of the medical magnesium alloy metal part. The device and the method can manufacture parts which have complex shapes required in the medical field directly, and have the advantages of high forming efficiency and the like.

The invention discloses a vehicle flowrate and vehicle type identification system, which comprises one or a group of magnetic sensor for detecting the interference signal of vehicle to earth magnetic field in static state or in motion, a signal amplification unit, a filtering unit for filtering the amplified signal, a collection unit for converting the analog signal into digital signal, a signal processing unit for classified identification of digital signal according to vehicle type and automatic detection of vehicle flowrate and a display unit for displays the identification result. After experiment, it is proved that the invention is able to accurately identify different vehicle characteristics, precisely work out the identification result of vehicle type and vehicle flowrate, prevent the interference of climate and weather and ensure high identification rate.

Disclosed is an electroencephalogram signal processing method and device. Acquired electroencephalogram signals are subjected to amplification preprocessing, Kaiser Window processing is performed on digital electroencephalogram signals including alpha wave, beta wave, theta wave and delta wave, and index parameters of the electroencephalogram signals are obtained through amplitude analysis, time domain analysis and frequency domain analysis. The electroencephalogram signal processing device comprises an electrode sensor, a preprocessing device, an analog / digital (A / D) conversion unit, a digital signal processing unit, an output unit, a display control unit and a storage unit. The electroencephalogram signal processing device is combined with a computer software analyzing and processing device, and human-machine operation is utilized to achieve functions of result display, healthcare advice, voice prompt and the like. The electroencephalogram signal processing device is convenient, easy to use, low in cost, maintenance-free and capable of conveniently displaying the current mental state and electroencephalogram in real time for students, white-collar employees and mental workers.

The invention relates to an indoor environment safety intelligence control system which comprises an indoor environment detection apparatus which is connected with an input terminal of a center processor. An output terminal of the center processor is connected with an indoor environment adjusting device. The center processor is connected with a lighting device, a camera and a hard disk video recorder. When an indoor environment parameter detected by the indoor environment detection apparatus is not corresponding to a preset indoor environment parameter, the center processor adjusts an indoor environment through the indoor environment adjusting device. Simultaneously, the center processor starts the lighting device, the camera and the hard disk video recorder. The center processor can transmit video information in the hard disk video recorder and the indoor environment parameter detected by the indoor environment detection apparatus to a control center through a system communication module which employs a DL / T860 standard communication protocol. The invention has the advantages of compact structure, convenient usage, a high automation degree, good adaptability and capability of raising security and reliability of enclosed space.

An off-resonance photoacoustic spectrometric detection and analysis device consists of a photoacoustic spectrometric module (8). The photoacoustic spectrometric module (8) comprises a light source module (2-1), a photoacoustic signal generation module (2-2), an optical power measurement module (2-3) and a fault diagnostic analysis module (2-4). Optical signals generated by an infrared incoherence light source in the light source module (2-1) are focused by an ellipsoidal reflector to form a focused light beam, the focused light beam is modulated into light of specific frequency and wavelength by chopping blades of an optical chopper and optical filters and then transmitted to the photoacoustic signal generation module (2-2), and the fault diagnostic analysis module (2-4) calculates each gas concentration according to to-be-tested gas photoacoustic signals generated by irradiation, diagnoses faults and alarms. The off-resonance photoacoustic spectrometric detection and analysis device can be used for quantitative detection of gases such as SF6, CF4, SO2F2, SOF2, SO2, SF4 and H2O and is applicable to onsite online monitoring.

The invention discloses an unmanned plane undercarriage control system which comprises a control mechanism, a drive part, a control part, a sensor part, an undercarriage arm and a damper rod, wherein, the control mechanism has a worm wheel and worm structure, one end of the rocker of the control mechanism is fixedly connected with the worm wheel and the other end is connected with one end of the damper rod, the other end of the damper rod is connected with the upper part of the undercarriage arm through a pin roll, one end of the worm is connected with the drive part, the sensor part is arranged in the upper limit hole and the lower limit hole of the control mechanism, the control mechanism is fixedly arranged on the load-carrying structure of the plane body, the upper end of the undercarriage arm is connected with the plane body through a load-carrying rotating shaft on the plane body and the lower end of the undercarriage arm is connected with the front wheel of the plane, the control part is arranged on the avionics frame of the plane and respectively abutted with the drive part and the drive part through cables. The invention uses the simple mechanical structure, the simple electric drive apparatus and the spring-type damper rod and needs no supplementary structures or power-assisted devices for support, having a small volume and occupying little space. The invention can realize locking of the undercarriage up and down stations under the coordination of the worm wheel and worm structure, the crank link mechanism and the brushless motor static brake resistance.

The invention discloses an efficient wireless meter reading method for an automatic network router. The router comprises a concentrator serving as a primary node and a collector serving as a secondary node. Firstly, one communication network can have only one primary node, and each primary node may have 255 secondary nodes; in the same wireless network, each node has an unique communication address of which value ranges from 0 to 255; the primary node ID is 0, while the secondary node ID ranges from 1 to 255; secondly, wireless data transmission modules arranged on the primary node and the secondary node are provided with a plurality of optional channels, a communication channel is required to be adjusted under both two conditions; and thirdly, the primary node acquires all communicable secondary nodes by an automatic route method, and acquires relay paths to all secondary node so as to realize the wireless meter reading. The invention can improve the application performance of a meter reading system and fulfill the aims of convenient construction, free debugging and less maintenance.

A wood-plastics shuttering board for building engineering is composed of at least two basic wood-plastic ply layers made of the filler (vegetative fibers, glass fibers and plastics) and assistant (calcium carbonate, modifier, coupling agent and lubricant), and at least one lattice material layer between two basic wood-plastic ply layers and with two adhesive layers coated on its both surfaces. Its manufacture technology is also disclosed.

A regulatable supporter is composed of top plate, top seat, ball hinge, screw piles, locking nuts, base of screw pile, locking screw and base, and can be regulated vertically and horizontally in stepless mode. Its advantages are less compression and high precision.

The tightly closed space of the stator consists of the stator chassis, the non-magnetic stainless steel isolated sleeve, the tightly closed end cap and the pressuring ring. The cooling loop consists of the liquid-lead groove between the stator core sections, the stator winding / stator end winding, the stator vaporizing space and the air condenser (AC). Via the gas entering tube and the liquid returning tube, AC connects to the stator chassis to form a main cooling circle loop. The heat produced due to the consumption of the stator components transfers to the vaporization cooling media (VCM) to raise its temperature. When the temperature reaches the saturation value based on inner pressure, VCM in the capacitor vaporize and occur phase-changing decalescence, then cool down by AC and finally liquidize. The invention causes stator core temperature distributing evenly. Features are: safe and reliable, simple structure, small volume, and large power density.

The invention discloses a super-capacitor-based DC voltage sag suppression device and a super-capacitor-based DC voltage sag suppression method thereof, which belong to the technical field of power equipment. The device consists of a super capacitor array (CS), a Buck / Boost type bidirectional power conversion circuit and a contactor (KD). When a voltage sag suppressor is powered on and run, the super capacitor array (CS) is charged by the Buck / Boost type bidirectional power conversion circuit; and when a DC bus has voltage sag due to a failure of an AC system, the super capacitor array (CS) provides energy to realize boosting by the Buck-Boost type bidirectional power conversion circuit to support the voltage of the DC bus. The invention has the characteristics of simple structure, high reliability, low loss, long service life, no maintenance, no environmental pollutions and the like.

The present invention relates to damping controller for suspended tuning mass damper used for tower type building structure. The damping controller has rigid suspending rod, rather than flexible wire, for supporting balance weight to avoid its torsion and jitter; cross universal hinge for connecting the main structure and the rigid suspending rod and makes it possible to control the vibrations in different directions; and friction damping fin, rather than piston type damper, mounted in the cross bearing site to provide damping. The present invention can perform damping and vibration controlling stably and effectively, and has convenient regulation of three control parameters and no need of maintenance.

The invention relates to a friction damper which comprises a plunger and a restraint cylinder, wherein the plunger is at least locally arranged in the restraint cylinder. The friction damper is characterized in that at least one group of combined expansion rings is arranged on the surface of the plunger; the combined expansion rings are formed by matching outer circular rings with inner conical surfaces and inner circular rings with outer conical surfaces; an inner wall of the restraint cylinder is tightly contacted with the surfaces of the outer circular rings; or a wear-resistant and rust-proof layer or a wear-resistant and rust-proof sleeve is arranged between the restraint cylinder and the outer circular rings. The friction damper is simple in structure, stable in property, long in service life, very environment-friendly and better in engineering practicability, does not require maintenance basically, can continue to be used after repair, has the renewable characteristic and a wide market application prospect, can adjust damping parameters conveniently, and can optimize and adjust the damping parameters of a product according to engineering practice in a field.

The invention discloses a fast steering mirror. An upper support frame is sequentially connected with an auxiliary mirror bracket and a main mirror bracket by an elastic bracing frame, and the main mirror bracket and the auxiliary mirror bracket are respectively fixed with a main mirror and an auxiliary mirror; four linear voice coil motors are symmetrically arranged on the surface of the upper bracing frame, and the center is provided with a through hole; a semiconductor laser, a position sensitive detector and a spectroscope tilting 45 degrees are respectively arranged under the upper bracing frame, wherein, laser emitted from the semiconductor laser passes through the spectroscope and the through hole and reaches the auxiliary mirror, the auxiliary mirror reflects the laser back to the spectroscope, and then the spectroscope reflects the laser to the position sensitive detector. The fast steering mirror has the advantages of compact structure, high angle control precision, no friction loss and high resonance frequency, can be widely used in the fields such as space optical communication, adaptive optical compensation, laser processing, laser radar and the like.

The invention discloses a self-powered wireless two-way communication sensor which comprises a microcontroller unit 9, a power supply management control unit 7 connected with the microcontroller unit 9, and a wireless signal transceiving unit 11 connected with the microcontroller unit 9, as well as soft magnet 1, a conductive coil 2, a permanent magnet 3 and a reset spring 4, wherein the wireless signal transceiving unit 11 can realize two-way communication and one-way receiving or transmitting; the positions of the conductive coil 2, the permanent magnet 3 and the reset spring 4 are fixed relatively; the conductive coil 2 is sheathed on the soft magnet 1, the fulcrum of the soft magnet 1 in the conductive coil 2 is fixed relative to the conductive coil 2, two ends of the soft magnet 1 can do certain vertical displacement around the fulcrum, and the displacement can not exceed the height of inside space at two ends of the permanent magnet 3; one end of the soft magnet 1 is connected with the reset spring 4; and the soft magnet, the coil 2, the permanent magnet 3 and the reset spring 4 forms a self-powered energy collection unit 20. According to the invention, no wiring, batteries or maintenance is required, and microniaturization can be achieved.

The invention provides a modularized box type charging and battery swapping station used for replacing a battery of an electric car. The charging and battery swapping station comprises a central monitoring room 1, a battery swapping robot 2 and a charging and battery swapping box 3, wherein the central monitoring room 1 is used for monitoring the charging and battery swapping station, the battery swapping robot 2 is located between the charging and battery swapping circuit 3 and the electric cars provided with batteries to be replaced, and the battery between the electric cars provided with batteries to be replaced can be replaced; and a battery storage rack 301, a battery charger cabinet 302, a monitoring cabinet 303, a distribution cabinet 304, a temperature control system 305 and an access path 306 are arranged in the charging and battery swapping box 3. The modularized box type charging and battery swapping station, provided by the invention, has the advantages of strong adaptability, flexible configuration and expansibility, small floor space, high working efficiency, short construction period, benefit for large-scale popularization and construction, high automation degree, smaller device maintenance amount, simple structure and low fault rate.

The present invention relates to a dry high-voltage capacitor core used in the high-voltage electric appliance of electric power system and the method thereof. The capacitor mandrel includes the carrying conductor, the insualting layer, the capacitor shroud, the gronding end shroud, the leading-out wire for measure and the outer insualting layer. Said inner insualting layer is formed by means of winding the insulating tows or band which is impregnated with binding solidified material. Said capacitor shroud is formed by means of uniformly winding the riband or two semiconducting material oral carbon fiber which is impregnated with binding solidified material and said capacitor shroud and said insulating layer are alternately winded together and are solidified into the concentric round in-series capacity voltage-sharing structure of multi-layer pure solid without interface.

The invention relates to an aircraft (1), preferably an unmanned aircraft (UAV), drone, or unmanned aerial system (UAS), comprising a rigid wing (2), which enables aerodynamic horizontal flight, and at least four rotors (4, 4'), which are driven by means of controllable electric motors (5) and which can be pivoted between a vertical starting position and a horizontal flight position by means of a pivoting mechanism (7), wherein all electric motors (5) and rotors (4) are arranged on the wing (2).

The invention discloses a gas-liquid two-phase flow uniform distribution device, which mainly comprises a main distributor pipe, a hydrocyclone, a rectifier, critical nozzles and branch distributor pipes, wherein the hydrocyclone and the rectifier are sequentially arranged in the main distributor pipe; the critical nozzles are arranged on the wall of the main distributor pipe at the downstream of the rectifier; and the rear part of each critical nozzle is connected with a branch distributor pipe; gas-liquid two-phase flow is subjected to the action of the hydrocyclone and the rectifier, so the unsymmetrical flow patterns, such as stratified flow, wave flow and incomplete annular flow are rectified into an annular flow pattern that the thickness of the liquid film is uniformly distributed, which ensures that branch pipes at the downstream have an equal chance to contact the gas-liquid phase; the gas-liquid two-phase mixture in the critical flow nozzles is accelerated to be in the state of critical flow; and the changes of parameters such as downstream pressure and the like are not delivered to the upstream, so the defect of the phase separation caused by the inconsistent resistance characteristics of the branch pipes at the downstream is overcome and the uniform distribution is realized. Compared with the prior art, the gas-liquid two-phase flow uniform distribution device is not affected by the fluctuation of the downstream parameters of the branch pipes of the distributor, does not need human intervention, can carry out self-adaptive adjustment, and has the advantages of small volume, compact structure, no moving parts, no maintenance, good environmental adaptability.

The invention provides an intelligent battery cycle charge-discharge testing device. The device is a secondary battery automatic charge-discharge testing device with low price, high precision and good stability. The device can test main parameters of a secondary battery, has safe and reliable performance and has wide application prospect. The device comprises a power supply module, an electronic load, an acquisition control module, a PC machine and a charge-discharge module, wherein an output of the power supply module is connected with the electronic load and the charge-discharge module; a battery to be tested is connected with the electronic load by the charge-discharge module; a signal acquisition end of the acquisition control module is connected with the battery to be tested, while a control end thereof is connected with the charge-discharge module; and the acquisition control module is on-line with the PC machine by a USB data wire.

The invention relates to a super-large trolley type gas heat treatment furnace. The gas heat treatment furnace is characterized in that a fixed rear wall of the conventional furnace body is changed into a movable rear wall, a steel member of the movable rear wall is fixed on a travelling mechanism, and a lining is arranged on the lateral surface of the steel member; and a sealing mechanism is arranged on each of the upper, lower, left and right parts of the movable rear wall, so that the movable rear wall, the lining of the furnace body and a trolley are sealed. Moreover, a furnace door dropping preventing device is added in a furnace door and a lifting mechanism and drives a safety pin by means of a reset force of a spring, once the furnace door drops due to loss of pull, the safety pin quickly extends out, and the furnace door is clamped on upright posts on two sides of the furnace door, so that the furnace door is prevented from continuously dropping. The using efficiency of the super-large heat treatment furnace is effectively improved; energy waste caused by ineffective combustion in the redundant space is avoided; the sealing mechanisms of the movable rear wall are reasonable in structure, easy and convenient to operate and convenient to maintain, and can achieve good sealing performance and increase the overall energy-saving effect of the heat treatment furnace; and thefurnace door dropping preventing device promotes the running safety of the furnace body.

The embodiment of the invention provides a database maintenance method and device. The problem that in the prior art, a database maintenance mode is low in efficiency is solved. A database maintained through the database maintenance method comprises multiple standard questions and multiple expansion question sets, wherein each standard question corresponds to one expansion question set. The method particularly comprises the steps that data to be stored in a the database is input to a standard classification model to obtain the matched standard questions, wherein the standard classification model is established on the basis of multiple natural language statements and the standard questions corresponding to the natural language statements respectively; the data to be stored in the database is stored in the expansion question sets, corresponding to the matched standard questions, of the database.

A steering column assembly of a vehicle has a rocker-arm lock device for locking an adjustable steering housing and co-extending steering shaft to a stationary bracket or chassis. For driver convenience and comfort, the steering housing and shaft are together adjustable with respect to the bracket. The rocker-arm lock device has a slot in at least one of the housing and bracket and a carrier for longitudinal movement through the slot that is substantially perpendicular to a rotation axis of the steering shaft. An indexing apparatus of the device has first and second indexing rails carried by at least one of the housing and the bracket having the first slot and a carriage engaged rigidly to the carrier. A rocker arm of the apparatus is supported pivotally to the carriage about a rocker axis disposed substantially perpendicular to the carrier. The rocker arm carries first and second pads spaced diametrically outward from one another with respect to the rocker axis and facing laterally toward respective first and second indexing rails for selective engagement of at least one of the first and second pads to the respective first and second indexing rails.

The invention relates to a plate type variable friction damper, which is primarily used in the field of wind resistance and shock resistance of structures and equipments. The invention makes use of the variation of the friction factor of a friction surface to provide a linear damping variable friction damping device. The plate-type variable friction damper primarily consists of two cover boards, a sliding panel, a pre-tightening bolt, a disk spring and a packing strip. The friction surface of the cover board is divided into three equal parts; the friction factor between the middle friction surface and the friction surface of the sliding panel is smaller than the friction factors between the friction surfaces of the two parts on both sides and the friction surface of the sliding panel. The plate-type variable friction damper avoids the defects of high cost, being maintained intricately and oil leakiness of the traditional linear damping device, such as the oil damper, and overwhelms the problem that the constant friction damper can not keep the same control under different loads. The invention has simple structure, and is produced easily with low cost. The invention is applicable for both large structures and small structures and equipments, and is suitable to be promoted and used in the field of shock resistance of structures and equipments.

The invention discloses a vehicle-mounted unit of a 5.8 GHz electronic toll collection (ETC) system, comprising a primary processor unit, a 5.8 GHz wireless communication module, an IC (integrated circuit) card interactive module, an information displaying module, a power management module, a JTAG (joint test action group) debugging interface and an anti-dissembling module, wherein the 5.8 GHz wireless communication module is connected with the primary processor unit to realize DSRC (dedicated short range communications) short distance wireless communication which meets the Chinese national standards of the ETC; the IC card interactive module carries a double-interface CPU (central processing unit) card and can be compatible with an artificial semi-automatic charging way; and the power management module utilizes a solar battery to charge a lithium battery. The 5.8 GHz wireless communication module of the vehicle-mounted unit receives arousal signals and data which are transmitted from a RSU (rate-sensor unit) and sends to the primary processor unit; and the primary processor unit reads and writes the double-interface CPU card according to the received data and transmits vehicle / trade information to the RSU, so as to realize electronic toll collection.

The invention relates to a reconfigurable task processing system, a scheduler and a task scheduling method. The system comprises the scheduler, a layout and a resource manager, wherein the scheduler is used for extracting space-time attribute parameters of a received task, calculating the slackness of the task, generating a potential layout time table PPTL of a task layout, sending the PPTL to the layout, scheduling tasks in a queue to be scheduled according to a received layout result fed back by the layout, and sending resource state update information to the resource manager according to the scheduling result; the layout is used for performing a layout research on the resource provided by the resource manager according to each time in the PPTL after receiving the PPTL, obtaining a start time and a corresponding resource of the task and feeding back the layout result to the scheduler; and the resource manager is used for updating a resource state in a task layout area when receivingthe resource state update information sent by the scheduler, and providing a three-dimensional search space for the layout so as to improve the scheduling efficiency of the task.

The present invention discloses a kind of piston energy storage device. It includes the following several portions: cylinder, cylinder cap, piston, end cover and charging valve connected on the cylinder cap. The described cylinder cap is fixed on the top end of the cylinder, the end cover is fixed in bottom end of said cylinder, said piston is positioned between cylinder cap and end cover and can be used for dividing the cylinder interior into air cavity and oil cavity. It is characterized by that between the end portion of piston closed to the end cover and inner wall of said cylinder a ring groove is formed, in said ring groove, a sealing ring is mounted.

The invention discloses a searching method and searching device based on text. The searching method based on text includes: step 1, acquiring feature words included in text streams which are sent by users, step 2, acquiring a feature probability of every business, which corresponds to every feature word from a pre-built feature probability lexicon, step 3, calculating a joint probability of every business, which corresponds to the text streams, according to the feature probability of every business, which corresponds to every feature word and step 4, outputting final matching business according to the joint probability acquired by calculating, storing every feature word in the feature probability lexicon and updating the corresponding feature probability of the feature word in the feature probability lexicon. According to the searching method and searching device based on text, the searching efficiency can be increased and operating costs can be reduced.

The invention discloses a solid particle damper device, and relates to the technical field of dampers. The solid particle damper device comprises a damper cylinder and a damping rod. The damper cylinder comprises a first cavity and a second cavity. A piston is arranged between the first cavity and the second cavity. A spring device is arranged in the first cavity. One end of the spring device is fixed to the inner wall of the damper cylinder. The other end of the spring device is fixed to the piston. A plurality of solid spherical particles are arranged in the second cavity. The damping rod sequentially penetrates through the spring device of the first cavity and the piston to enter the second cavity and is connected with the solid spherical particles in a friction mode. The solid particle damper device can be suitable for the application fields of shock insulation of high-rise buildings, shock absorption of large bridges, collision buffering of high-speed vehicles, braking of new-concept weapons and the like, and is a novel damper which has the advantages of being large in bearing power, low in cost, high in efficiency, free of maintenance, high in reliability and the like.

An embedded type wireless strain / emergency / temperature sensor testing platform includes a spherical brittle shell and a rigid shell arranged in the brittle shell; a spherical joint is hinged with the rigid shell; the lower end of the spherical joint is provided with a dowel; an emergency instrument is arranged at the bottom part of the dowel and is fixedly connected with two linear metal emergency bars; a permanent magnet is arranged on the opposite side of the spherical joint in the rigid shell; besides, an electric device is arranged on the permanent magnet; a faraday first piezoelectric recycling device is arranged between the electric device and the emergency instrument. The invention adopts completely-inserting and wireless modes and has no requirements on the arrangement of circuits; the detected strain and emergency fields are not affected by wires; a small force-magnetism-piezoelectric energy device with low energy consumption is used, thus being capable of converting the mechanical vibration energy caused by traffic or vibration into the power of a chargeable battery so as to prolong the service life of a system; the MEMS / IT technology and the integration function are adopted which almost needs no maintenance; therefore, the total cost is lower.