349results about How to "No moving parts" patented technology

A method of and apparatus for determining and controlling the inertial attitude of a spinning artificial satellite without using a suite of inertial gyroscopes. The method and apparatus operate by tracking three astronomical objects near the Earth's ecliptic pole and the satellite's and/or star tracker's spin axis and processing the track information. The method and apparatus include steps and means for selecting preferably three astronomical objects using a histogram method and determining a square of a first radius (R₁²) of a track of a first astronomical object; determining a square of a second radius (R₂²) of a track of a second astronomical object; determining a square of a third radius (R₃²) of a track of a third astronomical object; determining the inertial attitude of the spin axis using the squares of the first, second, and third radii (R₁², R₂², and R₃²) to calculate pitch, yaw, and roll rate; determining a change in the pitch and yaw of the artificial satellite; and controlling on-board generated current flow to various orthogonally-disposed current-carrying loops to act against the Earth's magnetic field and to apply gyroscopic precession to the spinning satellite to correct and maintain its optimum inertial attitude.

A method of and apparatus for determining and controlling the inertial attitude of a spinning artificial satellite without using a suite of inertial gyroscopes. The method and apparatus operate by tracking three astronomical objects near the Earth's ecliptic pole and the satellite's and/or star tracker's spin axis and processing the track information. The method and apparatus include steps and means for selecting preferably three astronomical objects using a histogram method and determining a square of a first radius (R₁²) of a track of a first astronomical object; determining a square of a second radius (R₂²) of a track of a second astronomical object; determining a square of a third radius (R₃²) of a track of a third astronomical object; determining the inertial attitude of the spin axis using the squares of the first, second, and third radii (R₁², R₂², and R₃²) to calculate pitch, yaw, and roll rate; determining a change in the pitch and yaw of the artificial satellite; and controlling on-board generated current flow to various orthogonally-disposed current-carrying loops to act against the Earth's magnetic field and to apply gyroscopic precession to the spinning satellite to correct and maintain its optimum inertial attitude.

The invention provides an electric car power battery thermal management system. The electric car power battery thermal management system comprises a thermoelectric plate heat exchanger, a radiator, a fan, a battery pack, a kettle, a first circulating water pump, a second circulating water pump and connecting pipelines. The thermoelectric plate heat exchanger comprises a first fluid channel, a second fluid channel, a first fluid inlet, a second fluid inlet, a first fluid outlet, a second fluid outlet, a thermoelectric module, a positive electrode and a negative electrode. One closed and independent fluid circulating system is formed by the thermoelectric plate heat exchanger, the battery pack, the kettle, the first circulating water pump and one connecting pipeline. The other closed and independent fluid circulating system is formed by the thermoelectric plate heat exchanger, the radiator, the fan, the second circulating water pump and the other connecting pipeline. The two closed and independent fluid circulating systems can circulate two kinds of fluid at different temperatures to cool or heat a power battery. The thermoelectric plate heat exchanger is adopted for heating and refrigerating the battery pack, a heating mode or a refrigeration mode can be switched only by switching the positive electrode and the negative electrode of a power source of the thermoelectric plate heat exchanger, and the electric car power battery thermal management system is of a practical and reliable heat management structure.

The invention discloses an ejecting-type jet flow cavitation generator and a cavitation cell disruption device. The cavitation generator comprises a nozzle, a suction chamber, a throat pipe, a diffuser and an outlet pipe. The nozzle is connected in the suction chamber in a sleeved manner, and a suction pipe is arranged on the side of the suction chamber. The cavitation cell disruption device comprises a container, a high-pressure centrifugal pump and the above cavitation generator, wherein the container is used for storing cells to be disrupted, the high-pressure centrifugal pump is connected with the container through a water pipe, and the cavitation generator is connected with the high-pressure centrifugal pump through the pipe. Valves are respectively arranged on an entrance of the nozzle, the suction pipe and the outlet pipe to control degree of cavitation. In the cavitation cell disruption device, high-pressure liquid sucks up low-pressure liquid to cause cavitation to happen in the tail end of the suction chamber and the throat pipe, cells are disrupted by microjet and shock waves produced from bubble collapse, and drastic shearing actions between the other two fluids can also have tearing effect to the cells. The ejecting-type jet flow cavitation generator and the cell disruption device for cavitation cells are simple in structure, low in cost, free of moving components, reliable in operating, strong in cavitation transport, high in crushing efficiency, and thereby applicable to mass application.

The invention is suitable for the spectral imaging technical field, and provides a coded aperture spectral imaging system which comprises a preposition imaging system, a digital micro-mirror, a collimation system, a reflection raster, a microlens array and a detector. The microlens array comprises a plurality of microlenses; the filtering bands of the filtering layer on each microlens are different; the preposition imaging system images an object to be measured on the digital micro-mirror; the image after coded modulation is incident on the reflection raster through the collimation system to perform light splitting; a space spectrum mixing image is obtained after light splitting; a plurality of images are obtained through the microlens array with a filtering function; the detector simultaneously receives the plurality of images, and performs fusion decoding on the plurality of images to obtain the spectral information of the object to be measured. The coded aperture spectral imaging system can maintain system single rapid measurement, and meanwhile substantially improve system spatial resolution.

The invention discloses a method and a device for measuring accumulated liquid of a natural gas pipeline. The method comprises the following steps of: vertically transmitting high-frequency ultrasonic wave into the pipeline by an ultrasonic probe coupled to the outer wall of the measured pipeline, wherein the energy of reflection echo has great difference due to different properties of gas and liquid media; judging that the pipe inner wall is contacted with gas or liquid at the position of the probe according to the characteristic of echo received by the ultrasonic probe and reflected by the pipe inner wall; gradually adjusting the measurement position of the ultrasonic probe on the pipe outer wall along the circumferential direction; and recording a circumferential angle of the ultrasonic probe by a circumferential angle ruler when the echo has mutation, and further calculating the height of the accumulated liquid. The method is a non-intrusive accumulated liquid measurement method, does not change the structure of the conventional pipeline, has no medium leakage risk, does not affect the operation such as cleaning the pipeline and the like, meanwhile is not affected by the composition of gas and liquid phase media in the pipeline and parameters such as temperature, pressure and the like, overcomes the defect that the conventional ultrasonic technology needs complex sound velocity correction, and is particularly suitable for measuring the accumulated liquid inside the pipeline for conveying corrosive and toxic media.

The invention discloses an optical fiber dot mode liquid level sensor, and belongs to photoelectric sensors. The optical fiber dot mode liquid level sensor is used for alarming, indication and the like for the upper limit and the lower limit of the liquid level. The liquid level height is measured mainly through sensitivity of an optical fiber probe to light intensity and different scattering conditions of light of the optical fiber probe in air and liquid. The optical fiber dot mode liquid level sensor is composed of optical fiber bundles and a signal processing circuit. The optical fiber bundles comprise the transmitting optical fiber bundle and the receiving optical fiber bundles. The wedge-shaped end faces of the optical fiber bundles form a detection end face. Sensitivity of liquid level detection can be improved and liquid drop adhesion can be prevented through the wedge-shaped end faces. The signal processing circuit is installed at the other ends of the transmitting optical fiber bundle and the receiving optical fiber bundles, and the structure in which the circuit and the probe are integrated is formed. The sensor and an upper computer are in data communication in communication modes such as RS485 or CAN or the industrial Ethernet. The optical fiber dot mode liquid level sensor is small in size, low in weight, integrated, convenient to install and maintain, light in appearance space, high in sensitivity, simple in signal processing, free of movable accessories and high in reliability.

The invention provides a quick near-infrared measuring device and method for milk ingredients and relates to the technical field of near-infrared spectroscopic analysis. The device comprises a constant current driving unit, an LED (Light Emitting Diode) component unit, a sample pool unit, a photoelectric detection unit, a signal processing and control unit, a man-machine interface unit, and the like. A diffuse transmission measuring mode is adopted, sample absorbance values of sixteen short-wave near-infrared absorbing wavelengths are utilized and a prediction model in the device is used, thereby simultaneously measuring the indexes in the milk, such as fat, protein, milk sugar, non-fat milk solid, total milk solid, water, and the like. The quick near-infrared measuring device has the advantages that sixteen short-wave near-infrared absorbing wavelengths are used for quickly measuring the main ingredients of milk, thereby being small in data volume, high in measuring speed and suitable for on-site application. The device is small in volume, low in power consumption, light in weight and convenient in carrying, thereby being capable of meeting the requirement for quickly on-site analyzing the main ingredients of a milk sample.

The invention discloses a self-adaptive differential absorption spectrum measuring method of concentration of flue gas pollutants and a device. The method comprises the following steps: using empirical mode decomposition (EMD) to combine a 3 sigma criterion to determine decomposition scale and threshold value of gaseous pollutants absorbance, fully remaining own non-stationary characteristics of differential absorbance, effectively reducing background spectrum interference caused by dusts, establishing equation sets about concentration C1, C2 until Cn of gaseous pollutants to n types of pollutant gases (SO2, NOx) to be measured according to the differential absorbance after reducing noise and eliminating trend terms, and adopting a linear least square algorithm to obtain the concentration of the gaseous pollutants to be measured. The self-adaptive differential absorption spectrum measuring device of concentration of flue gas pollutants comprises a light source, an optical fiber coupler, an optical fiber spectrometer, a computer and an optical system consisting of a collimating lens, a beam splitter, a reference beam lens, a reflecting lens, a converging lens, a light baffle, an optical fiber coupler, a cross reticle, a sighting eyepiece, a lassenite window and an angle reflecting lens.

The invention discloses a device using panoramic view zone imaging lenses to realize stereoscopic imaging and a method thereof. The optical line emitted by an object point is formed on the image surface through the first panoramic view zone imaging lens, and the formed image is a first zone; the other optical line emitted by the object point is also formed on the same image surface through the second panoramic view zone imaging lens, and the formed image is a second zone; by changing the curvatures of all the surfaces in the first panoramic view zone imaging lens and all the surfaces in the second panoramic view zone imaging lens, the outside diameter of a first zone is smaller than the inside diameter of a second zone. By utilizing two panoramic view ring-shaped lenses positioned on the same optical axis, the invention forms the image of the same object point in the zone object space on the two noverlapping image points positioned on the same image surface; as the two images points obtain the information of the same object point from different visual angles, the steric information of the object point can be obtained, thus only one optical system can be used for realizing the stereoscopic imaging of panoramic view zone space.

The invention relates to a fracturing pulse sand filling system with ultrahigh flow conductivity. The fracturing pulse sand filling system comprises an external control unit, an internal controlled unit, an external fracturing pump truck unit, a sand mixing truck and a fluid storage tank. Fracturing sand-mixed fluid is accommodated in the sand mixing truck, fracturing base fluid is accommodated in the fluid storage tank, the external control unit controls the internal controlled unit, so that the sand-mixed fluid in the sand mixing truck and the base fluid in the fluid storage are alternately pumped into the external fracturing pump truck unit at intervals, and the sand-mixed fluid and the base fluid are finally alternately pumped into underground exploitation cracks at intervals by the external fracturing pump truck unit. The fracturing pulse sand filling system has the advantages that propping agent slugs added with fibers can be injected in a pulse manner under the control of the system, the flow conductivity of the prop cracks is greatly improved, a lag effect due to continuous opening and closing of an existing sand mixing truck is prevented, damage to the sand mixing truck is reduced, and pressure building during propping agent injection can be effectively prevented by the system.

The invnetion discloses a distributed fiber sensing system and technical scheme and provides a high earth-rockfill dam deformation monitoring fiber sensing technology and system. Integrated online remote measurement of three components of internal deformation of all particulate dam material areas (including upstream rockfills of a core-wall dam) of a core-wall earth-rockfill dam and a concrete-faced dam, panel dam perimeter joint-vertical joint deformation, panel flexibility-disengagement joints and concrete-faced bidirectional strain can be realized; large-scope time-space full coverage is realized; three uniquely molded fiber packaging structures are provided, a three-dimensional Euler elastic beam is formed, and force-light direct conversion of fibers is realized; three arrangement modes of the sensing system in a horizontal direction, a vertical direction and a dam slope direction, an integrated application method and a fiber laying technology are brought forward, integration of multiple functions of fiber monitoring is realized, construction is facilitated, the fiber survival rate is guaranteed, and an engineering application value is demonstrated. An optical demodulation instrument employs a high-precision PPP-BOTDA or Brillouin-Rayleigh synthesis system, can realize multiple purposes through one machine with other monitoring projects including seepage and the like and facilitates updating and upgrading of a safety monitoring system.

The invention discloses a refrigerating system with a Knudsen compressor as the core. The refrigerating system is composed of the Knudsen compressor (1), a high-temperature heat source (2), a condenser (3), a storage device (4), a throttling valve (5), an evaporator (6) and a dryer (7). The refrigerating system has the advantages that movement parts do not exist, lubricating oil is not needed, operation is safe and reliable, noise is avoided, pollution of the compressor to refrigerants is prevented, and the service life of the refrigerating system can be effectively prolonged; the refrigerating system is directly driven by heat energy, waste heat on some devices can be recycled, and the energy use ratio is improved; the environment-friendly novel energy, namely the solar energy, is directly used in the refrigerating system.

The invention belongs to the technical field of energy and discloses a heat pump system utilizing latent heat of solidification. The heat pump system utilizing latent heat of solidification aims at effectively utilizing the latent heat of solidification of water contained in a water source and reducing water consumption of a system to the greatest extent, and the problem of water shortage is further solved by additionally arranging a cooling tower to carry out ice melting under the specific temperature condition. The heat pump system utilizing latent heat of solidification is composed of a heat pump unit, a heat exchange device, a cyclone sand remover and an ejector, and the heat pump unit, the heat exchange device, the cyclone sand remover and the ejector are connected in a communicating mode through a tail end water supply pipe, a tail end water return pipe, a medium water supply pipe, a medium water return pipe, a water source water supply pipe, a water source water return pipe, a water source drainage pipe and a water source water inlet pipe. By utilizing the character that heat of solidification is released when water becomes ice, the inner wall of the heat exchanger is frozen through a low-temperature heat exchange medium, meanwhile, the inner wall of the heat exchanger is deiced through the impact and collision effects of a sand and water mixture, operation is carried out in cycle, and heat is released ceaselessly. The heat pump system utilizing latent heat of solidification is suitable for a water source heat pump system.

The present invention provides a fiber type ice coating sensor that pertains to a photoelectric sensor and that is used for detecting the degree of the ice coating on the surface of the object. The aim of the present invention reside in making the sensor more subminiature, more light, and making a minimal sensitivity and a best lower limit performance, and making a low cost, a simple signal processing without using sensitive material. The emitting fiber beam and the receiving fiber beam in the present invention are combined to from an integrated fiber beam: the end surface of the integrated fiber beam forms the end surface of the detecting head; the other end of the emitting fiber beam is provided with an emitting circuit; the other end of the receiving fiber beam is provided with a signal detecting circuit consists of a photorectifier and a amplifying preampcircuit which are connected in series. The fiber type ice coating sensor which is suitable for detecting the degree of the ice coating on the surface of the object is small, light and in a multiple-point distribution. The fiber type ice coating sensor without detachable accessories also has a good electromagnetic compatibility, a high reliability and a simple processing of signals.

The invention relates to a thermotropic phase-change thermal-control skin based on near-field thermal radiation and an application thereof in a spacecraft. The thermotropic phase-change thermal-control skin comprises a substrate, an inner-layer film system, an outer-layer film system and a protective layer from bottom to top, a spacer is arranged between the inner-layer film system and the outer-layer film system, and a vacuum gap with the interval of micro-nano magnitude is formed between the inner-layer film system and the outer-layer film system; and the inner-layer film system comprises athermotropic phase-change film layer composed of a thermotropic phase-change material; and the protective layer has high infrared emissivity or high infrared emissivity and low solar spectrum absorption rate. On one hand, the thermotropic phase-change thermal-control skin has good space environment adaptability, the problem of performance degradation caused by direct exposure of the phase-change material to the space environment is solved, and on the other hand, a large emissivity adjusting range in a narrow-temperature region can be provided, and the thermotropic phase-change thermal-controlskin can be applied to the spacecraft.

The invention relates to a thermoelectric generation module utilizing LNG cold energy, and a preparation method thereof. The preparation method comprises the following steps that: a mirror-polished quartz SiO2 glass sheet or polyurethane is taken as a base film; mixed crystals of Te, Bi and Sb are subjected to magnetron sputtering deposition according to the molar ratio of Pb to Bi to Sb being (0.1-0.3):6:1 and Te to Bi to Sb being (0.05-0.2):6:1 respectively so as to prepare a P-type nano-film sheet and an N-type nano-film sheet; and the P-type and the N-type nano-film sheets in series connection are inlaid into insulating ceramics and connected so as to form a main structure of the thermoelectric generation module used at low temperature. The LNG cold energy can be utilized better by use of the thermoelectric generation module. The module adopts a full-static thermoelectric-material thermoelectric generation mode, is simple in structure, can conveniently perform series or parallel combination, and is a way with great prospects to realize thermoelectric generation through LNG cold energy at low temperature.

The invention relates to a plasma-based aircraft aerodynamic characteristic analysis method. According to the method, the lift coefficient is improved and the drag coefficient is reduced based on the dielectric barrier discharge (DBD) plasma control technology. The lift-drag ratio of an aircraft is improved and the aerodynamic characteristic performance of the aircraft is improved. Furthermore, in the dielectric barrier discharge (DBD) plasma condition, the aerodynamic characteristics of the surface of the aircraft can be analyzed and obtained.

A refrigeration low-temperature system of heat sound magnetic includes a feedback tube (1), a elastic membrane (7), a room temperature terminal heat-exchange facility (2), a heat regenerator (3), a heat regenerator (4), a heat buffer tube (5), a room temperature terminal heat-exchange facility (6), a resonating tube (8) at the three-way, and also includes a pulse-tube refrigerator jointing to the resonating tube (8) by branch path form and a magnetic refractor jointing to the resonating tube (8) by branch path form, two refractor system is placed in the vacuum hood (32) with high vacuum.

The invention discloses a wearable air conditioning suit based on a bionic honeycomb structure. A throttling device of the wearable air conditioning suit is respectively connected with a condenser and an evaporator; a miniature compressor is respectively connected with the condenser and the evaporator; the evaporator is also connected with a miniature water pump and a honeycomb structural pipeline, and the miniature water pump is connected with the honeycomb structural pipeline through a small water storage tank; a lithium ion battery pack is connected with a controller; the throttling device adopts a capillary pipe with the diameter of 0.5-0.8mm; a wearing assembly is divided into a plurality of layers; a comfortable layer, a breathable layer, a heat insulation layer and a surface layer are sequentially arranged from inside to outside; the evaporator adopts a plate heat exchanger; a pipe network of a water cooling system is distributed in a net shape by using a honeycomb structure; the condenser adopts a parallel flow heat exchanger; and a small fan is parallel to the parallel flow heat exchanger. By using the wearable air conditioning suit, the temperature of a microenvironment in the suit is maintained within the range of +/-1.5 DEG C based on the temperature set by a user, and therefore, a comfortable microenvironment inside the suit is provided for a human body.

The invention relates to a heat pipe steam compression composite type refrigeration system for air conditioners and provided with an ejector. The outlet of a variable frequency compressor is divided into two paths, one path passes through a flow regulating valve and then is connected with the inlet of a nozzle of the ejector, the outlet of the ejector is connected with the inlet of an evaporator; the other path passes through a solenoid valve and then is connected with the inlet of a condenser, the outlet of the condenser is connected with the inlet of a liquid storage device, the outlet of the liquid storage device is divided into two paths, one path passes through an electronic expansion valve and then is connected with the inlet of the evaporator, the other path is connected with the ejection inlet of the ejector; the outlet of the evaporator is divided into two paths, one path is connected with the inlet of the variable frequency compressor, the other path passes through the flow regulating valve and then is connected with the inlet of the condenser; the system comprises two working modes including a compression refrigeration mode and a heat pipe cooling mode. Addition of mechanical devices is not needed, the refrigerant forced circulation of the heat pipe loop in the heat pipe cooling mode is achieved, the reliability of cooling of an outdoor natural cold source is ensured, and the development of the data center/communication base station (or machine room) air conditioner energy-saving technology is actively promoted.

The invention discloses a portable fruit internal-quality detection device using an optical detector. The device has a box body structure, and the side face of a case is provided with a displayer. A single-chip microcomputer, a fan, a power supply, a division plate, a fruit support table and the optical detector are arranged in the case. The optical detector completely integrates a light source, a light collecting element and an electronic element, is put just below the support table and can directly detect a near infrared spectrum of fruits. The device has the advantages of simple structure, small size, good stability and convenience and fastness in detection, collects spectra in a diffuse reflection mode, and is suitable for rapid non-destructive detection on site.

The invention relates to an on-line sampling device for multi-phase flow liquid. The device comprises a container which is uprightly installed, wherein the lateral surface of the upper end of the container is provided with a hole which is connected with an inlet pipeline, a spiral passage with a downward spiral angle is arranged in the container, and the inlet pipeline is connected with an inlet of the spiral passage; and the inner wall of the lower part of the container is welded with an annular liquid storage bin, 'L'-shaped diversion baffle plates are uniformly distributed on the inner wall of the container between the liquid storage bin and an outlet of the spiral passage, the upper end of the container is connected with a gas discharging pipeline, the lower end of the container is connected with a discharging pipeline of a process system, and the bottom of the liquid storage bin is connected into a liquid sampling and discharging pipeline. The device has the advantages of novel design, simple structure, elimination of movable component, high safety and reliability, convenience in installation, low cost, good applicability, high sampling quantity and high sampling accuracy and has obvious significance for reducing the product cost of a multi-phase metering product and improving the measurement accuracy of the phase division rate.

A simple, inexpensive, reliable and maintenance-free dispenser in which the stored products are offered automatically on the outside of the dispenser where they can be grasped by a hand without further manipulation. The dispenser includes housings in which the products, stacked in a column, are stored and moved by gravity and, at the base of each housing in front of the first product of the column, outlet orifices are closed by a closing membrane with slits. A slope is provided, in the lower rear part of each housing, to automatically advance the first product a predetermined distance through the outlet orifice so that the product partially emerges and can be grasped by hand on the outside of the dispenser. The dispenser can be used to automatically dispense consumable products, such as drinks, without prepayment, and for all types of industrial, commercial, home and other applications.

The invention relates to a method for exciting and controlling gas flow of the stator blade end wall of an axial-flow compressor by the aid of plasmas, which is characterized by including the steps: laying a plasma pneumatic exciter on the stator blade passage end wall of the axial-flow compressor, wherein the front edge and the tail edge of an electrode of the plasma pneumatic exciter are level to the front edge and the tail edge of a stator blade respectively, and the direction of the electrode is parallel to a mean camber line of the stator blade; when an engine controller detects flow instability indication, loading electric signals to the electrode of the plasma pneumatic exciter by employing a pulse plasma power source; and when the engine controller detects disappearance of flow instability indication, sending out control signals, and closing the plasma pneumatic exciter. The control method is capable of effectively suppressing stator blade angle area flow separation of the axial-flow compressor, short in exciting response time and wide in bandwidth, and has an important role in reduction of stator blade wake pitot loss and improvement on stability and efficiency of the compressor.