32results about How to "Free from interference from external factors" patented technology

The invention discloses an active ring resonator-based single longitudinal mode low noise narrow band column vector fiber laser. The single longitudinal mode low noise narrow band column vector fiber laser comprises a pumping source, a wavelength division multiplexer, a gain fiber, an isolator, a coupler, a seed source, a first optical circulator, a second optical circulator, a single-mode fiber, a few-mode fiber engraved with a grating, a first polarization controller and a second polarization controller which are connected with one another in a closed end-to-end manner through a fiber coupling way to form a ring optical fiber resonator. The components of the single longitudinal mode low noise narrow band column vector fiber laser adopts an all-fiber coupling mode; the structure is compact, the polarization purity of output column vector laser is high, the coherence is well, a single longitudinal mode working manner is realized, and the spectrum stability is high.

The invention discloses a robot chess opening arranging method and system based on target outline and skeleton characteristics. In the method, a chess piece positioning and identifying method of primary coarse positioning, region segmentation, secondary accurate positioning and extraction based on the target outline and skeleton characteristics combined with a SVM multi-classifier part is provided, and the automatic arranging function at the opening stage of an intelligent chess robot is achieved. The system is formed by a common Chinese-chess chessboard, chess pieces, a uArm four-degree-of-freedom mechanical arm, a sucking disc, a camera, a light source, a control system based on a PC and the like; the whole system is simple in structure and easy and convenient to operate, the full-automatic arranging function of the robot can be completed before man-machine chess playing is conducted, and the system has the good stability in the relatively-complex environment.

The present invention provides a strategy sending and receiving method and device, and a controller. The sending method comprises: determining a control strategy of a controller controlling a hierarchical network where the controller is located according to a network resource in a control area of the controller; and sending the determined control strategy to the controller. According to the invention, the problem is solved that a controller is low in operation efficiency in the prior art, and an effect of improvement of the operation efficiency of the controller is achieved.

The invention discloses a double front axle commercial vehicle kingpin caster angle and kingpin inclination angle matching method. The double front axle commercial vehicle kingpin caster angle and kingpin inclination angle matching method is characterized in that active aligning torques and negative aligning drag torques of a first axle and a second axle are established, and according to the phase equilibrium of the active aligning torques and the negative aligning drag torques of the first axle and the second axle in a steering process, the relation of a residue steering angle related to a first axle kingpin inclination angle, a first axle kingpin caster angle, a second axle kingpin inclination angle and a second axle kingpin caster angle is established to obtain the relation of a residue yaw velocity related to the first axle kingpin inclination angle, the first axle kingpin caster angle, the second axle kingpin inclination angle and the second axle kingpin caster angle; the first axle kingpin inclination angle, the first axle kingpin caster angle, the second axle kingpin inclination angle and the second axle kingpin caster angle are taken as design variables, a proper change interval is selected, an optimization target is set, and a complex method is applied to looking for an optimal solution to constrain an optimization problem. The double front axle commercial vehicle kingpin caster angle and kingpin inclination angle matching method is simple, rapid and high in precision, and the designing and the adjustment of the double front axle commercial vehicle kingpin caster angles and main kingpin inclination angles can be effectively guided.

The invention discloses a method for synthesizing a zinc ferrite spherical nano material by premixed flame. According to the method, Zn(NO3)2.6H2O and Fe(NO3)3.9H2O are adopted as precursors, stable high-temperature plane flame is formed by adjusting the flow of premixed gas of carrier gas, combustible gas and oxygen and adjusting the distance between a base plate and a nozzle, the atomized precursors are brought into the formed high-temperature flame surface through the carrier gas, and finally the ZnFe2O4 spherical nano material is successfully prepared. The method has the advantages of simple operation steps, low cost, one-step rapid synthesis and good product reproducibility, the prepared product has good crystallinity and no impurity phase, the product morphology is spherical particles with uniform dispersion, the particle size is 300-400nm, and the product is assembled by a large number of small particles with a particle size of about 10nm.

The invention relates to a glass curtain wall aluminum alloy wall frame. The frame comprises a longitudinal rod, a transverse rod, clamping devices, first suction devices and second suction devices, wherein the longitudinal rod is connected with the transverse rod in a bolt connection mode, the clamping devices are symmetrically mounted at the front end and the rear end of the middle of the transverse rod, the first suction devices are symmetrically arranged on the upper side of the front end of the transverse rod, and the second suction devices are symmetrically arranged on the lower side ofthe front end of the transverse rod. According to the frame, the problems that when an existing glass curtain wall is installed, glass is prone to influence by external factors such as wind during airtransportation, so that conveying deviation occurs, the glass collides with a hard material so as to be broken in the serious case, a certain gap always exists between an existing skeleton and the glass, due to the fact that the glass is in direct contact with the outside so as to be prone to influence of severe weather such as large wind and large rain, and the situation of shaking is prone to occur after installation are solved.

The invention discloses oxyhemoglobin saturation measuring equipment, method and device. The oxyhemoglobin saturation measuring equipment comprises a shell, protective glass, a light emitting unit, aprime lens, a focusing lens, an image sensor and a control unit, wherein an accommodating space is formed in the shell, a first light transmission hole communicating with the accommodating space is formed in the shell, and the protective glass is arranged in the first light transmission hole; the light-emitting unit is arranged in the accommodating space and is provided with a second light transmission hole; the prime lens, the focusing lens and the image sensor are arranged in the accommodating space and are sequentially arranged on a light propagation path; the control unit is electrically connected with the light-emitting unit and the image sensor; and the light-emitting unit alternately emits blue light and green light. The measuring equipment collects human tissue surface microcirculation videos under the irradiation of blue light and green light, and the oxyhemoglobin saturation value can be calculated through the human tissue surface microcirculation videos under the irradiationof the blue light and the green light.

The invention discloses an automatic crawling spraying machine and a spraying method thereof. The automatic crawling spraying machine comprises a climbing system, an adsorption system and a spraying system, wherein the adsorption system and the spraying system are both arranged on the climbing system; the climbing system is composed of an upper climbing frame, a lower climbing frame and a pushing assembly; and the upper climbing frame and the lower climbing frame are connected through the pushing assembly and can be pushed. The automatic crawling spraying machine can be suitable for all bridge concrete faces and is wide in application range.

The invention relates to a train integrity detection method and device based on pressure monitoring in train air ducts, wherein the method comprises the following steps: when the integrity test needsto monitor the train tail pipe pressure and the integrity test needs to monitor the head pipe pressure, if the pressure in the train air ducts meets the requirement A in sequence, determining a fact that the train has integrity; or when the integrity test does not need to monitor the tail pipe pressure of the train and the integrity test needs to monitor the head pipe pressure, if the pressure inthe train air duct meets the requirement B in sequence, considering a fact that the train has the integrity. The device comprises a train air duct and a head air pressure switch, an equalizing cylinder, an emergency exhaust valve and a train tail air pressure switch, wherein the train air duct, the head air pressure switch, the equalizing cylinder, the emergency exhaust valve and the train tail air pressure switch are respectively installed in the train air duct. Compared with the prior art, the present invention has the advantages of high efficiency, strong real-time performance, and being not influenced by the external environment and the like.

The invention discloses a real-time collection device and method for VSCs gas released on an aeration dynamic water surface, and relates to the technical field of sewage treatment. Comprising a box body system, a gas collecting system and a gas measuring system, the box body system comprises a gas collecting box, the gas collecting box is sleeved with a foam floater, a gas sample collecting opening is formed in the bottom of the gas collecting box, a gas outlet is formed in the side wall of the gas collecting box, and a connecting pipe is arranged at the gas outlet; and the Suma tank is communicated with the gas collecting box through a connecting pipe. According to the real-time collection device and method for the volatile sulfide gas, the VSCs gas naturally released from the aeration dynamic liquid level of a sewage treatment plant can be collected in real time, and the situation that natural release of the VSCs gas on the liquid level is interfered due to pressure change is avoided; meanwhile, a polytetrafluoroethylene connecting pipe-Suma tank inert collecting system reduces the situation that VSCs gas with active chemical properties is adsorbed by the device in the collecting process, and gas release rate, release flux, water discharge per ton and daily discharge parameters are accurately measured.

The invention discloses a self-heating desk and chair with lifting function, including a desk and a chair, first telescopic legs are symmetrically arranged on both sides of the desk, the top end of the first telescopic leg is fixedly connected with the desk through a bolt, the chair is symmetrically provided with a second telescopic leg on both sides, the first telescopic leg and the second telescopic leg are both composed of a first leg and a second leg. The first leg and the second leg are provided with a plurality of through holes, the second bolt penetrates through the through holes, the desk and the chair are provided with a heating pad, the inside of the desk and the bottom of the chair are provided with a battery module, one side of the desk and one side of the chair are provided with a switch mechanism, and the switch mechanism is electrically connected with the battery module. The invention has the advantages of providing a heat source through a heating pad, solving the problem that the hands and feet of the students are cold in class in the cold season, improving the learning efficiency of the students in winter, solving the inconvenience caused to the students due to theproblems of height and sitting posture through the first telescopic leg and the second telescopic leg, and improving the comfort feeling of the desks and chairs to the students.

The invention discloses a novel man-hour monitoring method. By utilizing a principle that required instantaneous fuel consumption data is different since an engine has different works under differentstates, the instantaneous fuel consumption is zero when engineering machinery is in downtime; the instantaneous fuel consumption is extremely stable and the fluctuation is small when the engineering machinery is standby; and the instantaneous fuel consumption is large in fluctuation when the engineering machinery is at work. By utilizing the principle, a working state of the engineering machineryis judged by computing a fluctuation variance yield of the instantaneous fuel consumption, and the monitoring precision is improved; a man-hour monitoring way of the monitoring method disclosed by theinvention cannot be affected by external factors, and is high in reliability and suitable for the engineering machinery such as an excavator, a loader, a bulldozer, a crane and like different varieties.

The invention discloses a sketch drawing board for software design, relates to the field of software design, and provides the following scheme aiming at the problems that part of existing sketch drawing boards do not have an adjusting function, do not have a light supplementing function and cannot protect sketches: the sketch drawing board comprises a board body, and a placing groove is formed in the board body; a placing groove is formed in the plate body, an iron sheet is installed in the placing groove, a lamp bead is installed at the top end in the plate body, a connecting block is installed on the side face of the plate body, a rotating shaft is installed on the connecting block, a plate cover is installed on the side, away from the connecting block, of the rotating shaft, a reinforcing plate is installed on the surface of the plate cover, and a visual window is installed on the surface of the plate cover. The drawing board is novel in structure, drawings can be fixed and more stable, the labor amount of a user is reduced, meanwhile, light can be supplemented into the board body, the situation that drawing work is affected by too dark light is avoided, the height of the drawing board can be further adjusted, and the drawings are protected against interference of external factors.

The invention discloses a rearview mirror fixing frame applied to a truck, and the rearview mirror fixing frame comprises: a fixing support which comprises a fixing rod and a connecting seat disposedat one end of the fixing rod, wherein the connecting seat comprises a connecting column and first interval protrusions evenly distributed in the circumferential direction of the connecting column, anda first interval groove is formed between every two adjacent first interval protrusions; and a positioning assembly, wherein the positioning assembly comprises a first shell, a transverse pressing piece with one end embedded into the first shell, and a first reset piece connected with the transverse pressing piece. The connecting seat is embedded into the first shell; the transverse pressing piece comprises a sliding rod, a driving head fixed to the outer end of the sliding rod and a limiting head fixed to the inner end of the sliding rod; and a first positioning bulge matched with the firstspacing groove is arranged on the limiting head. According to the rearview mirror, the angle and orientation of the rearview mirror can be conveniently adjusted, the orientation and state of the rearview mirror can be locked after adjustment, the stable state of the rearview mirror is maintained, and interference of external factors is avoided.