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335 results about "Declination" patented technology

In astronomy, declination (abbreviated dec; symbol δ) is one of the two angles that locate a point on the celestial sphere in the equatorial coordinate system, the other being hour angle. Declination's angle is measured north or south of the celestial equator, along the hour circle passing through the point in question.

Power control method of battery management system

ActiveCN103683391ASolve the problem that the charging and discharging power cannot be carried out according to the original look-up table valueSolve the problem that cannot be performed according to the original table lookup valueBatteries circuit arrangementsElectric powerInternal resistanceState of charge
The invention relates to a power control method of a battery management system. The power control method includes the following steps: establishing a two-dimensional power list of temperature and SOC (state of charge); detecting current temperature and an SOC value, looking up the list and estimating a current maximum allowable discharging power value according to a linear interpolation method; performing self-adaptive power correction; if abnormity of the system is detected, finding out related parameter values of abnormity of the system, and setting maximum allowable target discharging power at the time according to the related parameter values; smoothing the power value; transmitting the set maximum allowable target discharging power to a whole vehicle controller, and performing corresponding control by the whole vehicle controller. Compared with the prior art, the power control method has the advantages that the method can automatically adapt to environment and changing of circumstances of declination of actual battery capacity or increase of internal battery resistance and the like to correct allowable power values, and flexibility is high; smoothing is adopted, so that abrupt changing of the power value can be effectively prevented, influence caused by abrupt changing can be reduced, and comfortableness in the process of driving can be improved.
Owner:HUIZHOU EPOWER ELECTRONICS

Integrated docking and adding device and docking method

The invention discloses an integrated docking and adding device. The integrated docking and adding device comprises a driving part and a driven part, and a layout form of a center and a periphery in a circle is adopted; a center rod is flexible, and after soft docking is realized, three groups of rigid rods uniformly distributed at the periphery are in rigid connection; when the initial docking of the flexible center rod is completed, and declination of two spacecrafts in the pitching/yaw direction is corrected, declination of the spacecrafts at lateral (radial) positions is corrected; when the initial docking of three side rods is completed, the rotating declination of the two spacecrafts is corrected, and the rigidities of the two connected spacecrafts are provided; the center rod has functions of limitation and control in extending movements and retracting movements, and after the center rod extends in place, a feedback signal is provided by a Hall proximity switch; the center rod and peripheral rods are unlocked by electromagnets. According to the integrated docking and adding device, the Hall proximity switch is arranged at the top end of the flexible rod, so that an erroneous judgment of locking is prevented, and a driven end is guaranteed to be passive.
Owner:BEIJING INST OF SPACECRAFT SYST ENG

Cascade connection networking method based on xWDM wavelength-division multiplex RF far-drawing unit

The present invention discloses a cascade network building method based on the wavelength division multiplexing (xWDM) radio frequency remote unit, and mainly comprises the following steps: 1, the wavelength division multiplex (xWDM) is used in a radio frequency remote type BTS system for the cascade radio frequency remote unit RRU; 2, the wavelength division multiplex (xWDM) and the time division multiplex (TDM) are compounded and then used in the radio frequency remote type system, and different wavelengths are adopts to form the logical star connection between the BTS and different RRUs; 3, the wavelength division multiplex (xWDM) is used in the RRU of the cascade radio frequency remote type BTS system and in the base station system BTS; 4, the wavelength division multiplex (xWDM) is used in the cascade optical transmission system from the one-point main equipment to the multi-point auxiliary equipment. The network building method greatly saves the transmission resources of the system, enlarges the transmission capacity of the system, prevents the problem of gradual declination of the clocks which are restored and transmitted step by step in the TDM multiplexing mode, simplifies the problems in the estimation of time delay between the cascade systems, and is suitable for the base station system of multi-mode communication modes.
Owner:SUPERXON (CHENGDU) TECH LTD

Positioning system based on multi-directional polarized light navigation sensor and positioning method of positioning system

The invention discloses a positioning system based on a multi-directional polarized light navigation sensor. The positioning system comprises a fixed frame and an upper computer, wherein polarized light angle sensors for measuring the maximum polarization direction of incident light are installed on any two planes respectively, a level sensor and a direction sensor are installed on a datum plane of the fixed frame, and an astronomical calendar query module and a geomagnetic information query module are arranged in the upper computer. According to the system, a polarized light navigation technology and astronomical knowledge are combined, measured values of the level sensor, the polarized light angle sensor and the direction sensor on the fixed frame are obtained, geomagnetic declination data information is queried through the geomagnetic information query module in the upper computer, sun declination delta values at certain moments and true sun time differences on certain days are queried through the astronomical calendar query module, and the longitude and the latitude of a carrier are obtained through calculation by using an algorithm disclosed in the invention according to the data information.
Owner:DALIAN UNIV OF TECH

High-accuracy geomagnetic vector measurement method and device

A high-accuracy geomagnetic vector measurement method is characterized in that a vertical additional magnetic field and a horizontal additional magnetic field which have the same intensity but different directions are added to the position of a probe of a high-accuracy total-field magnetometer; a geomagnetic field without additional magnetic fields and a resultant magnetic field with an additional forward magnetic field and an additional reversed magnetic field are measured respectively; and then, each component, including a vertical component Z, a horizontal component H, a geomagnetic inclination I and a declination D, of a geomagnetic vector can be computed, and the method is suitable for fast and high-accuracy geomagnetic vector measurement outdoors or in a fixed station. According to the method, the geomagnetic vector measuring accuracy is in positive correlation with the accuracy of the matched magnetometer, and the high-accuracy total-field magnetometer is superior to a fluxgate three-component magnetometer with 10 nT of measuring errors. A high-accuracy geomagnetic vector field measurement device comprises one group or two groups of field coils and a tripod, the field coils are added to the outside of the high-accuracy total-field magnetometer probe, and the field measurement device is matched with the high-accuracy total-field magnetometer and used for rapidly measuring each component of the geomagnetic vector outdoors or in the fixed station.
Owner:高建东

Wall type arranged horizontal rich-lean direct current combustion device

A wall-mount horizontal bias direct-flow combustion device relates to a horizontal bias direct-flow combustion device. The invention solves the problems of the prior direct-flow combustor, such as four-corner tangential arrangement, different air supply conditions of coal flows on two sides, high risk of slag deposition due to declination and corrosion at high temperature. First dense/dilute air jet ports and a second air jet port (3) are formed on the water-cooled wall (6) of a furnace cavity (5) and combined to form a group of combustors (7). The central line (31) of the second air jet port and the central line (21) of the first dilute air jet port (2) are positioned in the fire-facing side direction, and have the included angles of alpha 1 and alpha 2 with relative to the water-cooled wall (6), on which the jet ports are positioned. The included angle between the central line (11) of the first dense air jet port and the central line (21) of the first dilute air jet port (2) is alpha 3. After-burn air jet ports (4) are arranged on the water-cooled wall (6) or at each corner of the furnace cavity (5). The After-burn air jet ports (4) are positioned above the combustors (7). The wall-mount horizontal bias direct-flow combustion device realizes reasonable combination of coal particles and air, prevents the deflection of coal flow, and ensures stable combustion, low load and low NOx discharge of boilers.
Owner:HARBIN INST OF TECH

Optical coherence domain polarization measurement device with optical path scanning position and speed correction function

The invention provides an optical coherence domain polarization measurement device with an optical path scanning position and speed correction function. The optical coherence domain polarization measurement device comprises a wide-spectrum light source, a polarization device to be measured, an optical path correlator, an optical path scanning correction device and an interference signal detecting and processing device. The optical coherence domain polarization measurement device is characterized in that the added optical path scanning correction device is composed of a laser light source, an optical fiber 3*3 coupler, a movable reflection mirror in the optical path scanning device, a faraday rotating mirror and a photoelectric detector, the optical fiber 3*3 coupler conducts phase shifting on an interference signal to complete passive signal modulation of a Michelson type optical fiber interferometer, the faraday rotating mirror is used for eliminating polarization declination of the interferometer, and high-precision and rapid measurement of the optical path scanning position and the optical path scanning speed is achieved on the basis of a dual-detector correction algorithm. According to the device, precision and uniformity of optical path scanning are improved, and the device has the advantages of being small in size, high in measurement accuracy, capable of being easily combined with an existing application structure, and the like, and is widely applied to interference optical path scanning and testing for measuring the remote distance on the basis of white light interference.
Owner:HARBIN ENG UNIV

Clothes pattern identification method based on contour curvature feature points and support vector machine

ActiveCN106384126AFacilitate subsequent morphological processingSmooth no-slope garment contoursCharacter and pattern recognitionFeature vectorEuclidean vector
The present invention relates to a clothes pattern identification method based on the contour curvature feature points and a support vector machine. The method comprises: obtaining clothes contour through preprocessing of the clothes image, extracting the contour curvature feature points of the clothes contour as feature vectors, and identifying the clothes patterns based on the support vector machine. The preprocessing of the clothes image comprises clothes image segment, edge detection, declination correction and the contour curve smoothing; the extracted contour curvature feature points taken as the feature vectors is that the set of big parts is extracted from the clothes contour curve to represent the main features of the contour shape and perform arrangement according to a certain sequence to form feature vectors; the clothes pattern identification based on the support vector machine is that the support vector machine classification method is employed to classify the clothes patterns. The clothes pattern identification method can allow the accuracy of the identification of the clothes patterns to reach up to more than 86%, and the identification of each sample is short in time consumption and is rapid and accurate.
Owner:DONGHUA UNIV
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