1819results about How to "Low environmental requirements" patented technology

The invention relates to a multiturn absolute rotary encoder based on a rotary transformer, which is characterized in that: a sensor is displaced by taking the rotary transformer as a shaft angle; a shaft angle decoding circuit can be formed by adopting DSP as a core processor; a sine wave which can be controlled by frequency and phase in the method that the circuit is synthesized by direct digital frequency for the numerical control of an oscillator; and the sine wave is directly taken as an excitation rotary transformer signal via a power amplifier and a filter circuit; the rotary transformer signal is transferred to A/D converter after being run through a matching circuit of electronic transformer; after sampling, digital filtering and digital signal processing, the sine and cosine value for the actual angle of two channels is generated; the angle error change is tracked dynamically by the PI algorithm; the mechanical displacement of the rotating object is converted into digital shaft angle position and speed. The multiturn absolute rotary encoder based on a rotary transformer has the advantages of high tracking speed, high conversion accuracy, high reliability, simple structure, sensitive movement, low environmental condition, strong anti-interference capability, high measuring accuracy and speed voltage output.

The invention discloses a multi-rotor unmanned aerial vehicle self-adaptive landing method and system. When an unmanned aerial vehicle takes off, a ground control station (such as a tablet computer, a cell phone or other control equipment) chooses an approximately proper area for the unmanned aerial vehicle to land in. When the unmanned aerial vehicle receives the order to land, it starts the landing mode and waits the landing action to take place. The landing face of the landing area is then checked to see if it is suitable for the unmanned aerial vehicle to land or not. If it is suitable, the unmanned aerial vehicle begins to land and the landing mode ends; if it is not suitable, the pose of the unmanned aerial vehicle is changed for continued landing. According to the invention, it is possible to realize safe and reliable self-landing of an unmanned aerial vehicle even at a place where the landform is complex.

The invention relates to a metamaterial structure for modulating a terahertz wave, comprising a central medium layer, an upper surface grid layer and a lower surface grid layer. The central medium layer is made of a polyethylene materials transparent to the terahertz wave and has a thickness smaller than the one-tenth wavelength of an incident terahertz wave; the upper surface grid layer adopts metal material and comprises a series of parallel grids periodically distributed on the upper surface of the central medium layer; each grid and gaps at both sides of the grid form a period, and the thickness of each grid is smaller than the width thereof; the lower surface grid layer adopts a metal material and comprises a series of parallel grids periodically distributed on the lower surface of the central medium layer; each grid and gaps at both sides of the grid form a period,, and the thickness of each grid is smaller than the width thereof; and the grids of the upper surface grid layer and the lower surface grid layer are symmetrically distributed in a mirror mode. The invention has the advantage that the modulation range of the terahertz wave is widened by a modulator because the transmission of the terahertz wave is constantly enhanced by a surface plasma wave.

The invention discloses an AGV trolley hybrid laser navigation method, which belongs to the technical field of AGV trolley navigation. The purpose is to provide an AGV trolley hybrid laser navigation method that adapts to the working environment where the terminal positioning accuracy is high and the running path has no fixed lines. The method includes the following steps: Step 1 constructs a two-dimensional map of the environment; In laser navigation mode without reflector, AGV car path navigation is carried out, and AGV car walks according to the navigation path; step 4 AGV car detects the laser reflector plate, enters laser precise positioning mode of reflector plate, performs precise navigation of AGV car, and completes AGV car reservation work. The invention is reliable, stable, portable, flexible, and accurate enough to realize AGV material pulling and transportation, has low environmental requirements for application sites, and has wide applicability. The present invention can not only be used in the industrial AGV application field, but also can be used in other application occasions, such as service robot navigation and the like.

The embodiment of the invention provides a method for pairing an unmanned aerial vehicle and a remote controller, a server, the remote controller and a system, wherein the system at least comprises the server, the remote controller and the unmanned aerial vehicle, wherein the server is used for judging that the remote controller is bound with the unmanned aerial vehicle in need of being paired, obtaining a pairing parameter corresponding to a pairing request, and returning the pairing parameter to the remote controller; the remote controller is used for generating the pairing request, sending the pairing request to the server, and performing communication configuration of the remote controller according to the pairing parameter; and the unmanned aerial vehicle is used for obtaining the pairing parameter from the server or the remote controller, and performing communication configuration of the unmanned aerial vehicle according to the pairing parameter. By means of the embodiment of the invention, the pairing accuracy rate of the unmanned aerial vehicle and the remote controller can be increased; and environmental requirements in the pairing process can be reduced.

The invention provides a bismuth bronze-steel composite bimetal bearing material and a manufacturing method thereof, and in particular relates to a bismuth bronze-steel composite bimetal bearing material formed by sintering a bismuth bronze alloy on the surface of a carbon steel material and a manufacturing method thereof. The bismuth bronze-steel composite bimetal bearing material has a laminated structure, the base layer is the carbon steel material, the surface is the bismuth bronze alloy, and the bismuth bronze alloy is sintered on the surface of the bismuth bronze alloy material. The method for manufacturing the bismuth bronze-steel composite bimetal bearing material adopts the powder metallurgy sintering method principle to sinter the bismuth bronze alloy on the surface of the bismuth bronze alloy so as to form the bismuth bronze-steel composite bimetal bearing material.

The present invention relates to outer wall paint, and is especially one kind of high performance nanometer outer wall paint and its preparation process. The nanometer outer wall paint has introduced organosilicon and fluoro resin to result in watertight coating with high permeation resistance and breathing function, water-thinned resin, nanometer titania particle, dispersing assistant and other assistants to make the paint possess well dispersed nanometer titania particle and excellent photocatalytic self-cleaning function.

The invention relates to a surface treatment process for stainless steel, in particular to a stainless steel passivation process. The process comprises the following steps of: dipping a stainless steel workpiece in an alkali degreasing solution for 10-30 seconds under a normal temperature condition; washing the workpiece by using water at the normal temperature; acid washing: acid washing the workpiece for 50-60 seconds by using a nitric acid solution at the normal temperature; washing the workpiece by using water at the normal temperature; soaking the workpiece in a passivation solution for 40-50 seconds at the normal temperature, wherein the passivation solution contains nitric acid and sodium dichromate; washing the workpiece by using water at the normal temperature; heating purified water to be higher than 75 DEG C, and putting and soaking the passivated and cleaned workpiece into the purified water for 4-5 seconds; taking out the workpiece and airing. The invention greatly saves the time for passivating the stainless steel workpiece, reduces the production requirements of the workpiece and ensures that the process is more suitable for practical production.

The invention relates to a polarization controlling encoding method, an encoder and a quantum key dispatching system. The invention is characterized in that the interior of the encoder adopts a polarization-maintaining light path or a ninety-degree Faraday rotation reflector reflection to cause output optical pulse polarization state to be the same; the optical pulse output by the sending terminalof the quantum key dispatching system taking the polarization controlling encoder as the core is passed to the receiving terminal thereof by a quantum channel in a uni-directional way; according to the superposition interference results of the optical pulse and distributorship agreement of the quantum key, the quantum key dispatching is realized. The polarization controlling encoder causes the whole system (comprising a sending set, a reception unit and the quantum channel) to have the interference free capability. The outlet of the sending set and the inlet of the receiving set of the systemare added with a reversal photon separation detection unit, thus preventing the invasion of the modulation information and carrying the photon to get off the reception unit of Trojan photon. The quantum key dispatching system can realize unconditional secure assignment of the key.

The invention relates to a centralization remote power feeding system including a primary device machine room arranged with wireless primary devices and power supply primary devices, which include an inverter and a transmission primary device for converting the external electricity 380 V industrial electricity into the -48 to 24 V DC to access to the wireless primary devices to cause the wireless primary devices operate normally; the -48 to 24 V DC is converted to the 220-380V AC through the inverter of the power supply primary devices, then the power is transmitted to the farend unit of the farend covering system of the base station part newly built through the common rod transmission mode of the power transmission line and the optical fiber transmission line, providing the stable power to the farend unit, thereby completing the construction of the whole base station. The invention reduces the building size of the base station, saves the project invest and advances the net operation safety reliability, which is applied in the signal covering of the road, the subway , the tunnel of the city and the small countryside base station.

The invention discloses a fluid bed reactor sound-wave monitoring device and method, where the device includes receiving device, amplifying device, signal collecting device and signal processing device; the method includes the following steps: a, receiving sound signal transmitted in the fluid bed reactor; b, analyzing the sound signal, to select the parameters like frequency f, amplitude A, energy E, energy partition Pi in each frequency segment, etc; the practice proves that it has characters of sensitivity, safety and environmental protection, facility and shortcut, etc, can in time and accurately make on-line analysis on the information in the fluid bed (fluid situation, reaction situation, particle size distribution, flow pattern distribution, etc) during the producing practice, and can control production parameters by analyzing result.

The battery is composed of the packaging bag made from aluminum-plastic complex film, positive and negative pole pieces, diaphragms, pole ears and electrolyte. The preparing method includes following technical procedures: forming the container for battery core, preparing and shaping positive and negative pole pieces, charging electrolyte, sealking etc. Under general environment, the method can manufacture batteries with different thickness and shapes in low cost and easy operations. The battery possesses the features of high density, lightweight, small size, large discharging current and good periodicity etc.

The invention provides a virtual sample house wandering system based on body sense control. The system comprises a body sensing device, a body sensing device intermediate, a processing system, a virtual reality engine and a display system. The body sensing device is used for acquiring image and depth information of a scene in which a user is. The body sensing device intermediate is used for converting image and depth information acquired by the body sensing device into information readable for a computer. The processing system is used for matching the information readable for the computer with preset template information, triggering corresponding instruction information according to matching results, and transmitting the instruction information to the virtual reality engine. The virtual reality engine is used for bearing virtual models, and controlling positions and facing directions of a virtual camera to allow objects in a virtual space to perform response interaction according to instructions transmitted by the processing system. The display system is used for outputting images rendered by the virtual reality engine in real time. By the body sensing device and the processing system, virtual wandering can be controlled by natural body languages, interaction with virtual objects can be performed by moving hands, and empathy of a user is high.

The invention discloses an optical phase delay precision measuring method and a system thereof. The system of the invention comprises a laser, a polarizer, a photo-modulator, a modulation signal source, a measuring phase retarder, a phase compensator, a polarization analyzer, an optical detector and a result output unit. The method of the invention is as follows that the optical modulator is added into a light path for optical modulation of detection polarized light and then modulation polarized light is generated; a result display unit realizes conversion from measurement of direct current zero point to measurement of alternate current zero point after conducting filtering process of the received signal, therefore, the position of an extreme point can be determined accurately and the measuring precision can be improved. The measurement of the invention is simple and convenient and the result is accurate and reliable, meanwhile, the precision is up to lambada/300; the invention is suitable for production of a wave plate and other optical delay devices and detection of the product in the sales department.

The invention relates to a solar net plate, in particular to a polyimide solar net plate. The polyimide solar net plate comprises a net frame and a polyester wire net. The polyester wire net is tied to the bottom of the net frame. A silk screen printing hole is formed in the center of the polyester wire net, and the polyester wire net is in a concentric square shape. A stainless steel wire net anda polyimide film are further included. The polyimide film is fixed to the bottom face of the stainless steel wire net. A high-temperature glue layer is arranged between the polyimide film and the stainless steel wire net. The polyimide film is provided with a plurality of wire grooves, and a printing pattern is composed of the wire grooves. The top face of the stainless steel wire net is fixed tothe polyester wire net. The stainless steel wire net is larger than the silk screen printing hole and covers the silk screen printing hole, and a hot melt glue layer is arranged between the stainlesssteel wire net and the polyester wire net. The net plate manufacturing technology is simple, the manufacturing cost is low, the yield is high, the service life of the net plate is long, and frictionresistance and cross section sharpness are obviously improved; and the service life reaches 100,000 times or more, and the purchasing cost of printing net plates is reduced for battery piece manufacturers.

A method for detecting reactor of fluidized bed includes analyzing sound emission signal received from internal of fluidized bed reactor; selecting characteristic parameter of sound wave signal to confirm material level height in fluidized bed, initial fluidizing speed, initial turbulent flow fluidizing speed and flow mode of particles in fluidized bed; analyzing confirmed items by computer for defining fault coefficient of particle agglomeration and setting threshold of fault coefficient; judging that caking is occurred in fluidized bed when fault coefficient is greater than set threshold.