144results about How to "No dead zone" patented technology

The invention discloses a variable air volume room temperature control method based on fuzzy PID and a prediction control algorithm. The method comprises the steps that the temperature deviation between an expected room temperature and an actual room temperature is input to a fuzzy adaptive PID controller, PID parameter incremental quantity of the opening degree of a tail end air valve is obtained through calculation, and calibrated opening degree of the tail end air valve is output; the opening degree of the tail end air valve of the fuzzy adaptive PID controller is subtracted from the opening degree of the tail end air valve of a previous moment by utilizing a time delay link to obtain the variable quantity of the opening degree of the tail end air valve; the prediction control algorithm is adopted to obtain the actual opening degree of the tail end air valve through the variable quantity of the opening degree of the tail end air valve, and the room temperature is maintained at a set value and is kept unchanged. The control method combining the fuzzy PID with the prediction control algorithm is adopted to solve the technical problems that parameter setting difficulty is large, working condition adaptive capacity is poor, and adaptive ability is weak in an air conditioning system in the prior art.

The invention relates to an enclosed animal experiment operation box and aims to solve the problems that the conventional pharmacological animal experiment causes environmental pollution which causes damage to instruments and equipment and influences experimenters' health, the operation view is not clear, and the light is insufficient. The enclosed animal experiment operation box comprises a box body and an operational table assembled inside the box body and used for fixing an experimental animal, and is characterized in that the box body comprises a base, a frame, a front baffle, a back baffle, a left baffle, a right baffle and an erector, fixed limiting posts and adjustable limiting posts are arranged on the operational table and limited to the rails of the base, guiding rods and an adjusting screw rod used for controlling the erector to move are arranged on the base, and a magnifier is arranged in the picture frame of the erector. According to the invention, the enclosed animal experiment operation box has the advantages of being simple in operation, convenient to adjust and the like, and provides modern experimental equipment with a clean and excellent working environment; the view is clean and the light is sufficient when experiments are carried out; the accuracy and the success rate of the experiments are significantly improved, and the experimental appropriation expenditure is reduced.

The invention relates to a method and device for detecting water body in advance area of multi-aquifer arborescence directional drilling of top plate. According to the invention, a drilling geologicalguide directional drilling tool is used for carrying out arborescence directional drilling construction, the drilling trajectory is controlled to extend along the designed aquifer and the designed trajectory, and the water body is thinned after the holes are formed; the arborescence directional drilling is composed of a main hole and a plurality of upward arborescence holes, wherein the main holeextends along the lower aquifer for a long distance and is used for detecting the water body in the lower aquifer; the upward arborescence holes passe through the upper aquifer and is used for detecting the water body in the upper aquifer. According to the invention, the problems of low water body detecting efficiency, large detecting error, high treatment cost and the like when the number of thewater layers of the top plate of the coal layer is large is solved, the method has the advantages of high detection efficiency, small construction quantity, high detection precision, wide coverage area and the like, realizes the advanced detecting of the water body of multi-aquifer for once and ensures the safe and efficient coal mining.

The invention discloses a foreign object detecting system between a screen door and a train door of a subway station platform. The foreign object detecting system comprising a foreign object detectiondevice and an image processor is characterized in that the foreign object detection device comprises a first detection module which comprises a first lamp belt and a first camera; the first lamp beltand the first camera are disposed between the screen door and the train door of the platform; the first lamp belt is vertically arranged on one end of a to-be-detected platform segment; the first camera is arranged on the other end of the to-be-detected platform segment and faces the first lamp belt; the first camera acquires the image of the first lamp belt to be sent to the image processor; theimage processor is used for identifying the image of the first lamp belt and judging whether a foreign object exists by judging the integrity of the image of the first lamp belt. The foreign object detecting system can detect the foreign objects at the distance between the screen door and the train door of a subway and high-speed railway platform with no blind spots, and eliminating or reducing accidents of clamping people occurring between the screen door and the train door.

The invention provides a piezoelectric-liquid-actuated elastic-membrane-position electric feedback two-stage servo valve and a control method thereof and belongs to the field of microfluid control. The servo valve and the control method solve the problem of poor reliability of an existing small flow and micro-flow control servo valve. The piezoelectric-liquid-actuated elastic-membrane-position electric feedback two-stage servo valve comprises a main valve body, a fixing damping hole, a balancing spring, a valve core, a guide valve body, two adjustable orifices, a piezoelectric-liquid-actuated elastic membrane component, a servo valve controller, a displacement sensor, five flow channels and a slide valve cavity. The method includes that the size and the direction of piezoelectric patch deformation are controlled by the aid of size and positive and negative control of piezoelectric patch input current of the piezoelectric-liquid-actuated elastic membrane component, so that the piezoelectric-liquid-actuated elastic membrane component generates small displacement, equivalent liquid resistance of the left adjustable orifice and the right adjustable orifice is changed, and further differential pressure is formed at two ends of the valve core until a displacement feedback signal of the valve core is equal to a given input signal. The servo valve and the method are applicable to small and microfluid control.

An adjustable-frequency resonance microwave reaction chamber with an open top belongs to the technical field of microwave energy application, and comprises an outer conductor (1), an inner conductor (2), a feeding coaxial body (3) and a pallet (4), wherein the top of the outer conductor (1) is open; the outer conductor (1) adopts a semi-sealed cylindrical metal cavity; the inner conductor (2) enters into the outer conductor (1) after penetrating a bottom hole (11); the feeding coaxial body (3) enters into the outer conductor (1) after penetrating a side hole (12); and the pallet (4) is fixed at the top end of the inner conductor (2). The reaction chamber manufactured by adopting the principle of a quarter-wave coaxial resonant cavity has the advantages that the frequency can be reconstructed in a wider range; and the frequency regulation method is continuous with no blind area; and the structure is simple. Therefore, the reaction chamber is suitable for the research and the application of wide-band microwave reaction, and has an application value in accurately cognizing the effect of frequency on microwave reaction and instructing related technology.

The invention relates to an automatic control system and method for a high-precision straightening machine and belongs to the field of automatic control. Through the automatic control system and method, the straightness (curvature) reaches over 0.3 mm/m according to the straightening precision of the high-precision straightening machine; a hardware structure and a software method of the automatic control system for the high-precision straightening machine are designed considering closed-loop control of oil source pressure and oil cylinder piston displacement of a hydraulic system of the high-precision straightening machine, continuous detection of straightening operation process data, stepless speed regulation control for calibrating transmission of all sets of straightening rollers and the like, the international advanced level of three-dimensional rotation straightening under high-precision automatic control is reached, consistency of roller gap precision in the straightening process, stability of evenly distributed and balanced straightening force and reliability of nonlinear variable gain automatic compensation can be guaranteed, the straightness is improved to 0.2 mm/m from 0.3 mm/m according to the straightening precision of the high-precision straightening machine, and the straightening target that straightened materials have no blind area or tiny crack or scratch or oval or bounce is achieved.

A transformer substation fiber perimeter security monitoring system disclosed by the present invention comprises a defence area unit and a central control system, the defence area unit is divided into a plurality of defence areas, and each defence area comprises a terminal unit, a vibration sensing optical cable, an alarm monitoring unit and a signal transmission optical cable which are connected orderly. The adjacent defence areas share one alarm monitoring unit, the signal transmission optical cables are connected with the central control system, and the central control system sends the alarm protocol data to the linkage devices via a network or an interface to configure an alarm linkage system. The transformer substation fiber perimeter security monitoring system of the present invention has the advantages of being low in signal detection loss, unit cost and laying cost, wide in monitoring range, good in concealment, high in security and automation degree, having no dead zone and electromagnetic radiation, having passive links, belonging to the active monitoring, etc., is specially suitable for the occasions of higher security levels, such as a transformer station, etc.

The invention discloses a pedestrian navigation method based on relative pose measurement, and relates to the field of navigation and location. The method comprises the following steps: (1) respectively mounting three groups of relative pose measurement equipment at a left foot and a right foot of a pedestrian; (2) determining navigation coordinate systems; (3) utilizing electronic switches mounted at a left sole and a right sole to detect contact of the left foot and the right foot of the pedestrian with the ground respectively; (4) utilizing a multi-target ranging circuit and an optical camera to respectively measure the relative poses of the left foot coordinate system and the right foot coordinate system, further respectively measuring the relative pose when the left foot and the right foot are in contact with the group for two times, and utilizing 9-axis inertial measurement units on the left foot and the right foot to respectively measure the relative pose when the left foot and the right foot are in contact with the ground for two times; (5) fusing the data of the three groups of pose measurement, and continuously repeating the pose measurement process from the step (3) to the step (5); (6) determining the relative position and the relative pose, corresponding to the navigation coordinate system, of the left foot coordinate system and the right foot coordinate system respectively; (7) displaying the marching paths and the pose of the left foot and the right foot.

The invention discloses a method for omnibearing detection of the defect of a PET bottle cap antitheft ring. The method comprises a PET bottle to be detected goes through the front light detection station I and the front light detection station II of a first detection cabinet and the back light detection station I and the back light detection station II of a second detection cabinet, a bottle cap top positioning, equalization processing, defect feature extraction and defect judging technology is adopted to realize prepositioned light image processing, an adaption ring positioning, defect feature extraction and defect judging technology is adopted to realize back light image processing, and non-blind area detection of defects in different positions of the bottle cap antitheft ring is carried out. The method has the advantages of low cost and high detection precision.

The invention relates to an electromagnetic furnace with turbine fan, which comprises a micro-crystal plate, a coil disc, a heat radiation plate, the electric devices on the circuit board, and two turbine fans on one end of the bottom. Wherein, the wind outlet of one turbine fan is opposite to the heat radiation plate; the wind outlet of another turbine fan is opposite to the electric devices. The invention uses eccentric diversion while the output airflow is smooth and centralized with less onflows and without blind section. The invention has many blades; therefore, the total projection area on the wind flowing area is larger than the wind flowing area. And via the eccentric effect, it can supply larger wind pressure than the axial flow fan. The better heat radiation system can make the working condition of electromagnetic reach best. The invention can prolong the service life of electromagnetic furnace and reduce the noise.

The invention belongs to the technical field of optical fiber sensing, and particularly relates to a distributed sensing system based on a Michelson-Sagnac optical fiber interferometer. According to the system, two arms of a Michelson optical fiber interferometer are used as sensing arms, and the two sensing arms are distinguished through adoption of a signal analysis algorithm; and the two interferometers detect the same time-varying disturbance at the same time, add and subtract the demodulated phases to obtain two paths of signals with time delay, and obtain the time delay related to the disturbance position through cross-correlation, so that the disturbance position information can be calculated. The maximum detection distance of the system can reach 140 km, and no blind area exists. According to the system provided by the invention, the Michelson-Sagnac hybrid optical fiber interferometer is utilized to realize distributed optical fiber sensing and positioning, the sensitivity andpositioning precision of long-distance distributed sensing are improved, the frequency response range of a distributed optical fiber sensing system is expanded, and the problem that positioning cannot be achieved when a traditional scheme is applied to buried optical cable positioning is solved.

The invention discloses a distributed oil and gas pipeline leakage monitoring system. Oil and gas leakage is monitored online by monitoring the temperature change of an oil and gas pipeline in real time. The system comprises a distributed optical fiber Raman temperature sensor (11), a sensing optical fiber (12), a warning device (13), a fire-fighting equipment interface (14) and a remote communication interface (15). The sensing optical fiber (12) is laid together with the oil and gas pipeline along the pipeline and is connected with the distributed optical fiber Raman temperature sensor (11), temperatures of all points of the oil and gas pipeline are measured by the distributed optical fiber Raman temperature sensor in real time, the difference between the temperature value of a leakage point when oil and gas leakage occurs and the normal temperature value is obvious, when the temperature difference exceeds a warning value set by the system, the system starts the warning device (13), sound and light signals are emitted for warning, meanwhile, fire-fighting equipment is started by the aid of the fire-fighting equipment interface (14), and a remote warning signal is emitted by the aid of the remote communication interface (15). Thus, the safety guarantee is provided for normal operation of the oil and gas pipeline.

The invention belongs to an adiabatic spontaneous combustion triangle method for comprehensive evaluation and identification of coal spontaneous combustion risk. The method mainly comprises the steps of: (1) determining a led spontaneous combustion period by a small coal amount and constant temperature difference led oxidation method, with a coal sample amount less than 200g and the temperature control in accord with the condition of: furnace temperature=coal temperature +leading temperature difference; (2) determining an adiabatic spontaneous combustion period by a hyperbolic fit empirical formula method; (3) comprehensively evaluating the spontaneous combustion risk, spontaneous combustion tendentiousness and ignition difficulty of coal through an adiabatic spontaneous combustion triangle method, and identifying the spontaneous combustion risk grade of coal with the adiabatic spontaneous combustion period as the only index. The technical problem that the invention aims to solve is to provide an adiabatic spontaneous combustion period determination technology which can employ a small coal amount and raise the temperature from normal temperature and can control an experiment period as well as ensure test repeatability, and to construct an adiabatic spontaneous combustion triangle for comprehensive evaluation and identification of coal spontaneous combustion risk, as well as to overcome the abuse of unilateral emphasis of spontaneous combustion tendentiousness in home and abroad.

The invention relates to a precooling method before unloading of an LNG (Liquefied Natural Gas) tank wagon. The precooling method comprises the steps of opening a first liquid inlet control valve of a storage tank, opening a self-pressurization gaseous phase and liquid inlet pipeline communicating valve of an unloading deck, opening a second upper liquid inlet control valve of a liquid-unloading storage tank to form an included angle of 25-35 degrees to precool a liquid inlet pipeline, opening the second upper liquid inlet control valve of the liquid-unloading storage tank to form an included angle of 55-65 degrees after 4-6min, completely opening the second upper liquid inlet control valve of the liquid-unloading storage tank after 4-6min again, opening a gaseous phase control valve of a self-pressurization system, a self-pressurization gaseous phase control valve of the tank wagon and a first gaseous phase control valve of the tank wagon, opening a self-pressurization liquid phase control valve of the unloading deck, opening a self-pressurization liquid phase control valve of the tank wagon to form an included angle of 10-20 degrees, pressurizing the tank wagon, opening a first self-pressurization gaseous phase and BOG (Boil Off Gas) system communicating valve of the unloading deck after the pressure is increased to be 0.5-0.6MPa, opening the self-pressurization gaseous phase and liquid inlet pipeline communicating valve of the unloading deck, enlarging the opening degree of the self-pressurization liquid phase control valve of the tank wagon to form an included angle of 60-90 degrees after the pressure of the tank wagon is reduced to be 0.3-0.4MPa, and completely opening after 4-5min. The pipe network can be well precooled, the precooling speed is high, and the precooling effect is thorough without blind areas.

The invention relates to the technical field of car-mounted monitoring devices, and discloses a compass car-mounted terminal capable of automatically reading an electronic number plate and a using method of the compass car-mounted terminal capable of automatically reading the electronic number plate. The compass car-mounted terminal comprises a processor module, an RFID reader, a storage module, a compass module, a GSM module and a power supply module; the RFID reader, the storage module, the compass module, the GSM module and the power supply module are respectively and electrically connected with the processor module. The using method of the compass car-mounted terminal capable of automatically reading the electronic number plate includes the following steps: starting the power supply module, and respectively initializing a failure warning module, the processor module and the RFID reader, wherein after the failure warning module and the processor module are sequentially initialized, the RFID reader is initialized, and self detection is carried out to determine whether abnormities exist or not. By means of the compass car-mounted terminal, the satellite location technology and the RFID technology are combined, full-road-section real-time locating monitoring can be achieved, and it is guaranteed that no blind area exists during locating monitoring; the RFID electronic number plate can be easily read. When the compass car-mounted terminal or the RFID electronic number plate breaks down or is damaged, direct replacement can be achieved, and binding setting of a monitoring center is not needed.

The invention relates to a pipe-end induction-based magnetic particle flaw detector. The pipe-end induction-based magnetic particle flaw detector is characterized in that the bottom of a magnetic yoke support is fixed on two inclined support plates of an upper support; a device enabling the magnetic yoke support to move to the front, the back, the left or the right is arranged under the upper support; a speed reducer is arranged at the top of the magnetic yoke support; an output end of the speed reducer is connected to the top of a screw; a nut arranged at a right side surface of a ram is connected to the screw; a left side surface of the ram is fixed with a magnetic yoke bridge; a front side surface and a back side surface of the magnetic yoke bridge are fixed respectively with two pairs of rotatable upper and lower magnetic yoke arms, and two cylinder racks; a right angle-shaped magnetic yoke probe is arranged at another end of each one pair of the rotatable upper and lower magnetic yoke arms; each one of the rotatable upper and lower magnetic yoke arms is provided with a magnetic yoke coil; each one of the two cylinder racks is provided with a magnetic yoke retractable cylinder piston rod; and extension ends of the magnetic yoke retractable cylinder piston rods are connected respectively with the rotatable upper and lower magnetic yoke arms. The pipe-end induction-based magnetic particle flaw detector adopts a compositely rotary magnetization device, and thus making a tubular workpiece needing to be tested have a stable, uniform and high-intensity longitudinal magnetic field and a circular magnetic field in the same state.

The invention relates to an oil-water interface measuring device, which comprises an optical sensing probe, a light source, a photoelectric detection device and a warning device, wherein the optical sensing probe comprises a pentaprism structure, an incident end optical fiber, an exit end optical fiber, a first collimator arranged on the incident end optical fiber, and a second collimator arranged on the exit end optical fiber; and the pentaprism structure comprises a closed pentagon surrounded by a first reflection edge, a second reflection edge, a third reflection edge, a fourth reflection edge and a fifth reflection edge, wherein the fifth reflection edge is a horizontal edge. The oil-water interface measuring device solves the technical problems that the accuracy for measurement of the existing oil-water interface is low and the normal operation of production cannot be ensured, the multipoint distribution oil-water interface measurement is realized, and the detection accuracy for the oil-water interface is improved.

The invention provides an optoelectronic data collection device of a mechanical pointer counter. The optoelectronic data collection device comprises a pointer, a pointer shaft key, a pointer output shaft, a dial, dial circles, dial marks, a positioning screw, a positioning hole, a positioning threaded hole, a counter gear box, a pointer position photoelectric sensing device, a serial communicator and a singlechip system, wherein the pointer position photoelectric sensing device comprises a light emission plate and a light receiving plate, as well as a diaphragm plate and a fan-shaped shade sheet located between the light emission plate and the light receiving plate. The pointer position photoelectric sensing device transfers the detected position of the pointer to the singlechip system; and the singlechip system processes the detected position via a singlechip procedure to obtain reading data of the counter and sends the reading data to the outside via the serial communicator. And meanwhile, the invention further provides a data processing method of the optoelectronic data collection device of the mechanical pointer counter. According to the device and the method, the requirement on the manufacturing process is low and the reading has no dead zone. The device and the method are applied to the instruments having the counter used for instruments such as water meters and gas meters in displaying, storing and sending the data to the outside.

The invention discloses a novel elastic device body compacting device, which comprises a compression screw, a gland, a shell and an elastic washer, wherein the compression screw is arranged on a bracket through a release nut, the elastic washer is arranged in the shell, the gland is arranged on the elastic washer, the bottom of the compression screw is abutted to the gland, the gland is in a concave shape with an upper edge, the central concave inner diameter of the gland is matched with the compression screw, the concave outer diameter is matched with the inner diameter of the shell, the outer diameter of the upper edge is larger than the inner diameter of the shell, the center of the concave bottom is provided with a through hole, the outer side of the gland is provided with a positioning hole, the lower part of the compression screw is provided with a running-through T-shaped through hole along the axis and the diameter, the T-shaped through hole and the through hole in the bottom of the gland constitute an air flue, the side part of the shell is provided with a positioning cavity, and when the gland is contacted with the shell, positioning pins can be arranged in the positioning cavity and the positioning hole; and the bottom of the shell is provided with an oil hole. According to the device disclosed by the invention, because a compaction stroke limit is set, the compression force is better controlled, the compaction state can be maintained, the installation is facilitated, a region of bypassed oil does not exist, and air blockage can not be produced.

The invention discloses a high-altitude atmosphere density online detection and calculation method which uses continuous lasers as a light emitting source, utilizes a photographing machine to receive the laser echo signals from the atmosphere, and analyzes and processes the laser echo images to obtain the atmosphere density information. The device adopted by the method of the invention is light, has a high space-time resolution, and possesses the advantages of rapid detection, continuous operation day and light, high automation, blind area exemption and easy mobility. Therefore, the method could be used by most military and civil aviation vehicles to measure atmosphere density.

The invention discloses an installation structure for an automobile radiator. The installation structure comprises an upper installation plate (1), a lower installation plate (4), a left bracket (5) and a right bracket (2). The upper end and the lower end of the left bracket (5) and the upper end and the lower end of the right bracket (2) are connected with the left end and the right end of the upper installation plate (1) and the left end and the right end of the lower installation plate (4) respectively. The lower middle portion of the left bracket (5) and the lower middle portion of the right bracket (2) are connected with a left engine compartment boundary beam and a right engine compartment boundary beam. The bottom face of the radiator (3) is assembled on the lower installation plate (4), and the top face of the radiator (3) is connected with the upper installation plate (1). The installation structure is characterized by further comprising an engine compartment boundary beam left front sealing plate (11) and an engine compartment boundary beam right front sealing plate (9), and the lower middle portion of the left bracket (5) and the lower middle portion of the right bracket (2) are connected with the left engine compartment boundary beam and the right engine compartment boundary beam respectively through the engine compartment boundary beam left front sealing plate (11) and the engine compartment boundary beam right front sealing plate (9). According to the installation structure for the automobile radiator, the radiator can be placed and assembled from top to bottom, installation is easier, and no dead zones exist.

The invention discloses a longitudinal magnetization moving coil device for plain shaft and crank shaft magnetic particle inspection. The longitudinal magnetization moving coil device comprises a plurality of longitudinal magnetization coils, a moving mechanism and a guide rail, wherein each longitudinal magnetization coil has a round integral structure; the guide rail is positioned on the front side of the longitudinal magnetization coils; the moving mechanism comprises a motor, a support, two guide rods, a screw rod, a connecting rod, coil connecting frames and a coil moving frame; the support is positioned on the back side of the longitudinal magnetization coils; the motor is connected with the left end of the screw rod through a driving device; an upper shaft sleeve and a lower shaft sleeve are arranged on the coil connecting frames, and are respectively sleeved on the two guide rods which are positioned on the support; the quantity of the coil connecting frames is the same as that of the longitudinal magnetization coils; a coil trough is formed on each coil connecting frame; the back sides of the longitudinal magnetization coils are buckled in the troughs of the back sides; coil troughs and a guide wheel are arranged on the coil moving frame; the front sides of the longitudinal magnetization coils are buckled in the coil troughs; and the guide wheel of the coil moving frame is positioned on the guide rail.