45 results about "Be star" patented technology

An electric leakage detection system having: a detection point forming circuit which forms a detection point being connected through three resistors which are star-connected to a three-phase output line of an AC generator; a voltage detection circuit which detects a voltage across the detection point and ground; an electric leakage detecting part which detects existence of the electric leakage from a period of the voltage detected by the voltage detection circuit; and electric leakage occurrence position determination means which determines an occurrence position of the electric leakage from a period of the voltage across the detection point and ground, and detecting the electric leakage at a position apart from the generator without laying around a grounding conductor which grounds a neutral point of the generator.

A structure layout parameter determination method of an agile satellite comprises two parts of solar panel layout parameter optimization and star sensor layout parameter optimization. An optimization goal of the solar panel layout parameter optimization is set as an energy generation value of each track of a solar panel, bounded variables of the optimization goal are track parameters, attitude parameters and solar panel effective charging conditions, and variable parameters are solar panel installation angles. Optimal values of the solar panel installation angles are determined by mathematical solution. An optimization goal of the star sensor layout parameter optimization is set as a star sensor available time period, bounded variables of the optimization goal are track parameters and attitude parameters, and variable parameters are star sensor installation angles. The star sensor installation angles are iteratively computed by mathematical solution, and an available time period optimal value of each track of a star sensor can be obtained. The structure layout parameter determination method can maximumly improve application effectiveness of the agile satellite under the premise of satisfaction of a working mode of the agile satellite and a satellite mission application mode.

The invention discloses a new truss-type satellite main structure public platform, which consists of a star-shaped central load-bearing frame (1), a bottom plate (2), a pair of ±Y-directed side plates (3) parallel to each other, and a pair of ±X-directed The side plate (4) is composed of; the star-shaped central bearing frame (1) includes the star-arrow docking ring (11), one X-direction W-shaped plane truss (12) and two symmetrically distributed Y-direction W-shaped plane trusses (13 ); 3 W-shaped plane trusses are star-shaped, i.e. distributed in a * shape, connected as a whole and connected to the side plates respectively; 3 W-shaped plane trusses are connected to the star arrow docking ring (11) through the bottom outer joint (129); The bottom plate (2) is connected with the star arrow docking ring (11) at the position of the opening in the middle. The platform of the present invention meets the satellite layout requirements while ensuring a reasonable force transmission path, can carry various types of payload compartments (or modules), and is suitable for use when the weight of the entire satellite exceeds 6 tons and the diameter of the storage tank is greater than 1 meter.

The invention relates to an air conditioner, especially a motor pad with better damping property and noise adsorption, wherein it is made from the rubber whose axial center has through hole and longitudinal section is 8-shape; the invention is characterized in that: said central through hole is star shape whose inward protrusion forms the diameter equal to the bolt; and the star radial protrusion forms the diameter of external round is less than the diameter of thin waist of motor pad.

The invention discloses an improved HVDC transmission line traveling wave protection method, aiming at the problem that the HVDC transmission line is prone to the transient fault, and further improving the stability of the whole HVDC transmission system through the improved line traveling wave protection method. The protection method mainly comprises the following steps: acquiring voltage and current fluctuation signals on both poles of a DC system in real time and eliminating signal impurities; at that time of the data reach the starting threshold, the fault identification unit is star; the fault identification unit analyzes and identifies fault types based on the improved fault parameter criteria. This method can overcome the problem that it is difficult to distinguish the internal faultfrom the external fault when the fault resistance is high and the fault distance is long in the traditional traveling wave protection. The detection accuracy is higher, which provides reliable protection action basis for the subsequent fault control and elimination.

The invention relates to a star sensor in-orbit measurement low-frequency error analysis method and device and a storage medium, and the method comprises the following steps: determining an in-orbit measurement error of an included angle of optical axes of two star sensors according to the difference between the included angle of the optical axes of the two star sensors in in-orbit measurement in an inertial system and the included angle of the optical axes of the two star sensors in installation in a satellite body system, wherein the two star sensors are star sensors on the same target satellite; performing spectral analysis on the gyro constant drift on-orbit estimation data of the target satellite, and extracting periodic characteristics of a star sensor on-orbit measurement low-frequency error term of the target satellite; according to the in-orbit measurement error and the periodic characteristic of the optical axis included angle, constructing a fine fitting model of the in-orbit measurement low-frequency error of the star sensor through a constant term and a periodic basis function; determining the constant term by the on-orbit measurement error, wherein the fine fitting model is used for determining the on-orbit low-frequency error of the star sensor. By adopting the scheme, the purpose of high-precision analysis of the low-frequency error in the in-orbit measurement of the star sensor is achieved.

The invention provides a substrate, a preparation method thereof and a mass spectrometric analysis detection method for metabolic molecules, and belong to the field of material synthesis and mass spectrometry. A zinc oxide substrate is synthesized by a hydrothermal method with sodium hydroxide and zinc acetate as raw materials, conditions are easy to control, the time consumed is short, and the operation is simple. The prepared zinc oxide substrate is star-shaped nanoparticles assembled by sword-shaped nanorods with sizes of less than 2 microns, particle sizes are uniform, and the substrate has good ultraviolet absorption properties, thereby having good properties being helpful of ionization analysis the a sample molecular. Compared with a spherical nano-zinc oxide substrate, the star-shaped zinc oxide substrate has smaller background noise, can remove the background interference and hot spot effect of traditional substrates, meanwhile, has better salt-tolerant and protein-resistant properties, and can be used for complex biological sample systems such as serums and the like. Simultaneously, sample pretreatment operations such as enrichment, separation and the like are not requiredin the detection process, and the efficient and rapid detection of the metabolic molecules is achieved.

The invention discloses a carbon-fiber fabric composite material complete vehicle frame. The carbon-fiber fabric composite material complete vehicle frame is prepared from a three-dimensional frame, which is prepared by splicing carbon-fiber fabric composite material honeycomb tubes supported by carbon-fiber fabric composite materials in an annular shape; interior supports of the honeycomb tubes are star-like supports; annular supporting frames are in honeycomb holes of the star-like supports in the honeycomb tubes; and the annular supporting frames consist of winding tubes or weaving tubes. According to the carbon-fiber fabric composite material complete vehicle frame, tubular structural parts of the honeycomb-like supports prepared by using the carbon-fiber fabric composite materials arespliced with joints to form the complete vehicle frame; therefore, when the vehicle frame is stressed, the stress on the vehicle frame can be distributed to each branch of the honeycomb shape and canbe uniformly distributed on the structural part to enhance the integral stress level of the structural part; and as the support of the structural part is honeycomb-shaped, the material and weight ofthe structural part are reduced when being compared with the material and weight of a solid structural part, the cost is saved, and the structural part realizes stronger stress capability when being compared with the solid structural part.

The invention discloses a star-shaped ground body of a nanometer conductive anticorrosion coating. The star-shaped ground body of the nanometer conductive anticorrosion coating comprises a cone-equipped star-shaped ground body of the nanometer conductive anticorrosion coating. The cross section of a star-shaped steel rod (1) is star-shaped; the surface of the star-shaped steel rod (1) is coated by the nanometer conductive anticorrosion coating (2); the upper end of the star-shaped steel rod (1) is welded with a wiring terminal (3) coated by the nanometer conductive anticorrosion coating; and the star-shaped cone end (4) of the nanometer conductive anticorrosion coating is inserted into a ground layer. According to the invention, the shape of the ground body is well designed, so that the contact area of the ground body can be effectively improved, the metal material consumption of the ground body is reduced, and the cost is saved.

The invention discloses a non-stop air compressor. The non-stop air compressor comprises a main compressor, two sets of air inlet systems, two sets of oil-air separation systems and two sets of oil-air cooling systems sharing an oil-air cooler. The non-stop air compressor is provided with a power frequency and frequency conversion dual-control system. A main motor achieves star connection through a first contactor and achieves triangular connection through a third contactor. Starting of the air compressor is star-triangular switching starting. The main motor is connected with the output end of a frequency converter through a second contactor. The input end of the frequency converter is connected to a three-phase power source. The main motor is connected to the three-phase power source through a fourth contactor. The input end of a control power source is connected to the three-phase power source through a transformer. Due to the facts that the non-stop air compressor is provided with two sets of systems (double oil filters, double oil-air barrel systems and the double air inlet systems) and the power frequency and frequency conversion dual-control system is adopted, when one set of systems is in fault or needs maintenance, operation can be switched to the other set of systems, and thus normal operation of the air compressor is ensured.

A reactive power compensator for an electric power transmission or distribution network comprising reactive components (9) for compensating reactive power and an autotransformer (6) with pairs of primary windings (5) and secondary windings (7), the primary windings for connecting the autotransformer (6) to power lines (3) and the secondary windings (7) for connecting the autotransformer (6) to second poles (9b) of the reactive components (9), the primary windings (5) being star-connected to form a star-point (8) and the secondary windings (7) being connected to the star-point (8) of the autotransformer (6).

The invention discloses a reflection gain type high-power laser device and relates to the fields such as industrial cutting, military science and the like with higher requirements on the power of the laser device. The laser device comprises a quartz tube (1), an internal tube wall gain coating (2), a totally reflecting mirror (31), a partially reflecting mirror (32) and a pumping source (4); and the internal tube wall gain coating (2) is made from rare earth ions. The internal tube wall gain coating (2) can be used for totally reflecting generated laser signals. The totally reflecting mirror (31) can be used for totally reflecting the generated laser signals. The reflectivity of the partially reflecting mirror (32) to the generated laser signals is 4-96%. The pumping source (4) can be used for directly irradiating the quartz tube (1) from the lateral side. The shape of the cross section of the quartz tube (1) is characterized in that both the internal wall and the external wall are circular or rectangular, or the internal wall is star-shaped and the external wall is circular. The reflection gain type high-power laser device disclosed by the invention is beneficial to solving of the problem of concentration quenching resulting from overhigh doped concentration in the high-power rare earth ion doped laser device.

The invention discloses a low power consumption power capacitor fast discharge device, and relates to the technical field of power grid alternating current power reactive compensation. The device comprises circuit units. Each circuit unit comprises a choke coil, a discharge resistor and an RC resistance-capacitance overvoltage absorber. Each choke coil is connected in parallel with a RC resistance-capacitance overvoltage absorber, and then is connected in series with a discharge resistor. Each RC resistance-capacitance overvoltage absorber comprises an absorption capacitor and an absorption resistor. Each absorption capacitor is connected in series with an absorption resistor, and then is connected in parallel with both ends of a choke coil. Three sets of circuit units are star-connected with A/B/C ports of a three-phase capacitor, wherein the neutral point is impending. Each absorption capacitor uses a ceramic capacitor with the rated voltage of 630V, and the capacity is 0.1uF. Each absorption resistor uses a carbon resistor with the powder of 1W. Each choke coil uses an EI type single winding transformer coil, and the input rated voltage is AC 250V. The device provided by the invention has the advantages of small running power consumption, stable operation without maintenance, low cost and short discharge time, and each set is less than 15 yuan.

The invention relates to an electrostatic dust suppression device of a belt conveyor. The electrostatic dust suppression device comprises a metal barrel, a circulating fan, a rapping device fixed on the metal barrel (7) and a plurality of mutually connected cathode electrodes (3) distributed on different parts in a sealed cavity, wherein the metal barrel covers the upper portion of a belt (8) and forms the sealed cavity together with a belt conveying frame (1). High voltage is applied between the cathode electrodes and the metal barrel (7) serving as an anode and used for electrostatic adsorption of raised dust. The circulating fan (5) is used for disturbing dust-containing air flow in the sealed cavity. The rapping device is used for dropping accumulated dust from the cathode electrodes (3) and the inner wall of the metal barrel (7). The cathode electrodes (3) are star-shaped. The invention also provides a method for controlling the electrostatic dust suppression device. The electrostatic dust suppression device has the advantages of being good in dust suppression effect and saving energy.

An automatic detection and tracking method for lung tumors based on global optical flow method comprises the following steps: 1) preprocessing X-ray shooting video, processing image including enhancement, etc. to improve pathological discrimination of lung; 2) setting a preparation time for that doctor to manually align the lungs of the patient first, and star global optical flow detection after the alignment; 3) when that detection of the optical flow method is star, the continuous images collect by the X-ray photographing equipment are estimated, and the optical flow values of each moving object are compare; 4) frame selection is carried out for the local flow field with the largest optical flow value, and the tumor frame is selected by a polygon frame with variable size and continuous approximation, and is used as a tracking target in the whole operation process; 5) tracking the selected target, namely tumor, by optical flow estimation; 6) tracking the histogram distribution of thetarget area by using the mean shift as the tracker of the target motion. The invention has strong robustness, low error and high sensitivity.

The invention relates to the field of servo control, in particular to a linkage energy-saving control device for a common bus servo controller. The linkage energy-saving control device for the common bus servo controller comprises an alternating current servo motor (1), servo controllers (2), a velocity sensor (31) and a brake resistor (6). The linkage energy-saving control device for the common bus servo controller is characterized in that the device further comprises a voltage transducer (32) and a master controller (4), buses (7) of the servo controllers (2) are mutually connected, communication lines (5) of the servo controllers (2) are mutually connected, the topological relation of the connection of the communication lines (5) of the servo controllers (2) is star connection, bus connection or ring connection, and a microcomputer or a single chip microcomputer is selected as the master controller (4). The rotating speed of the alternating current servo motor which is in a generator state is adjusted, so that the busbar voltage can be indirectly adjusted, and the linkage energy-saving effect can be achieved. The linkage energy-saving control device for the common bus servo controller is simple in structure, rapid in response, accurate in controlling, safe and reliable.