145 results about "Phase point" patented technology

The invention relates to a method for carrying out online monitoring on an operating state of a transformer OLTC (on-load tap-changer) and belongs to the field of signal monitoring. The method comprises the following steps of: acquiring a mechanical vibrating signal of a box wall of a transformer in real time; carrying out phase space reconstruction on the vibrating signal x(t) by using a delay coordinate method; determining a designated area V of a reconstructed phase space; calculating density distribution of space phase points; calculating a correlation coefficient rho of a space density curve before and after the OLTC actuates; if the correlation coefficient rho is more than 0.8, judging that the operating state of the OLTC is normal; and if the correlation coefficient rho is less than 0.8, judging that the operating state of the OLTC is abnormal. By carrying out real-time monitoring on the vibrating signal in the actuating process of the OLTC, efficient and accurate judgment on the working state of the transformer OLTC can be implemented. The method can be widely used for the field of online monitoring and fault diagnosis of various transformer OLTCs.

Provided are a terminal device and a retransmission control method that make it possible to minimize increases in overhead in an uplink control channel (PUCCH), even if channel selection is used as the method to transmit response signals during carrier-aggregation communication using a plurality of downlink unit bands. On the basis of the generation status of uplink data and error-detection results obtained by a CRC unit (211), a control unit (208) in the provided terminal (200) uses response signal transmission rules to control the transmission of response signals or uplink control signals that indicate the generation of uplink data. If an uplink control signal and a response signal are generated simultaneously within the same transmission time unit, the control unit (208) changes the resources allocated to the response signal and/or the phase point of the response signal in accordance with the number and position of ACKs within the error-detection result pattern.

A Doppler Asymmetric Spatial Heterodyne (DASH) spectrometer includes an input aperture for receiving an input light; a collimating lens for collimating the input light into a collimated light; offset establishing means, including at least one grating, for i) receiving and splitting the collimated light into a first light wavefront in a first optical path and into a second light wavefront in a second optical path, ii) establishing an offset in a light wavefront path distance between the first and second optical path light wavefronts, and iii) diffracting and recombining the first and second optical path light wavefronts into an interference wavefront to form an interference image that includes a plurality of phase points of a heterodyned interferogram measured simultaneously over the path distance offset; and an output optics section comprising a detector for receiving the interference image and outputting an interference image pattern.

The invention is applicable to the railway electric locomotive field, and provides an automatic neural section passover control method of an electric locomotive, a device thereof, and the electric locomotive. An RF locator card is arranged on an overhead contact, an RFID location reader is arranged on a roof and used for identifying the RF locator card, a vehicle host computer calculates and calibrates distance between the locomotive and a front section card or a phase point prediction card according to location information of the RF locator card collected by the RFID location reader on the top and kilometer post data read by the vehicle host computer from a TAX box as well as current speed of the locomotive, and performs on/off blockout control with the location information of the RF locator card as main means and the kilometer post data as supplementary means in a neural section passover area so as to ensure optimal blockout position from calculation output and reduce speed loss, meanwhile, the dual locating technology also ensures safety and reliability of the automatic neural section passover of the electric locomotive, avoid missed neural neutral section detection, and provide convenient installation and maintenance.

The invention discloses a risk prediction evaluation method for wind power grid integration, comprising the following steps of: collecting original data of a wind power plant to obtain an initial wind power time sequence; performing phase space reconstruction on the initial wind power time sequence to obtain a phase point vector; performing K mean clustering computation on the phase point vector; introducing a weight vector to improve criterion for distance and trend of proximal points, and thereby obtaining a proximal point set; using the proximal point set as a training set of volterra self-adaptive filter to obtain wind power plant power prediction data. The risk prediction evaluation method for wind power grid integration provided by the invention eliminates the technical defect in the prior art which ignores different influence of the time sequence of own different coordinate components of the phase point on the prediction point and is prone to introducing false proximal points, effectively avoids the false proximal points, chooses the proximal point with distance and evolutionary trend both similar to the prediction point, and is thereby improved in computation accuracy and speed.

The invention discloses an analytical method of a rotor transient signal, which comprises the following steps: 1) two orthogonal current vortex displacement sensors are arranged on a rotor section to collect a vibration signal of a rotor relative to a bearing support, the direction of the sensor from X to Y is consistent with the rotation direction of the rotor, and an equal rotary speed signal is adopted for collection and a key phase signal is used for simultaneous complete alternation sampling; 2) signals collected are processed with anti-alias filtering, low-pass filtering and the like to remove unnecessary interference noise signals; 3) the computation of main vibration vector, vibration vector ratio, vibration vector angle and vector phase is conducted, complex FFT conversion is adopted and one-time FFT computation is utilized to obtain such characteristic parameters; 4) a relational graph of each parameter relative to rotation speed or other variables is drawn; and 5) a main vibration vector graph is used for expressing the vibration strength change of measuring points under a single frequency, a vibration vector ratio graph is used for expressing the ovality change of the single frequency vortex track of measuring points, a vibration vector angle graph is used for expressing the change of maximum vibrating direction, and a vector phase graph is used for expressing the change of a vibration vector and a reference phase point.

The invention discloses a data-driven information modeling method for a complex electromechanical system in the process industry. The data-driven information modeling method for the complex electromechanical system in the process industry is employed. The overall modeling process does not need prior knowledge of physical topology. In the modeling process, an information flow relationship is taken as a reference for analyses of coupling relations among different functional components of the system. By taking the anti-noise property and information loss into full consideration, a symbolization process of the system for monitoring time sequences is optimized. By binary coding and decimal decoding of symbolized phase points, the integration between the symbolization process with automated analyses and calculations is achieved. Therefore, the difficulty in building an information model of the complex electromechanical system in the process industry based on monitored data under the noise condition is resolved.

The invention discloses car carrying over split phase system, providing a system for car and vehicle passes the split phase stably and safely which not only can judge the position at front of the split phase point, but also can control the velocity of decreased current and upgraded current. The invention includes localizing system, primary control system, displaying system, primary controller procedure and localizing system procedure. The localizing system is made up of radio frequency identification system (RFID) and GPS localizing system. The localizing system procedure includes radio frequency identification system procedure and GPS localizing system procedure. The localizing system and the displaying system are connected to the primary control system through cables. The radio frequency identification system is made up of identifier and radio frequency card. The primary system includes a power, primary controller and external signal circuit, the external signal circuit is connected to the primary controller. The displaying system includes digital code tube, LED display, primary microchip and peripheral hardware circuit.

A phase searching detection method for a permanent-magnet planar motor by adopting a linear Hall array is characterized in that each coil corresponds to a Hall array and the Hall array is placed perpendicular to the horizontal output direction of each driving unit of the coil; linear Hall sensors in the Hall array are distributed in equal space in the even-multiple polar distance, are placed parallel with a permanent magnet array and are used for measuring the magnetic flux density component perpendicular to the movement direction of the planar motor; and the output signal of the Hall array is generated by adding all the signals of the linear Hall sensors in the Hall array. The output signal is basically changeless when the Hall array moves perpendicular to the horizontal thrust direction of the corresponding coil, and the signal carries out positive-negative alternation in the horizontal thrust direction of the corresponding coil and changes close to the sinusoidal waveform. The position relations between the coils and the permanent magnet array when the current in the coils of the driving units is zero (phase-change point) are determined. The phase searching detection of the permanent-magnet planar motor in two dimensions becomes superposition of two one-dimensional phase searching detection, thus realizing planar phase searching detection.

The invention discloses a traffic state prediction method based on the chaos theory and a device thereof. The traffic state prediction method comprises the steps that data stream of traffic roads are acquired so that time sequences of multiple traffic parameters are obtained; multi-parameter phase space reconstruction is performed according to the time sequences of the traffic parameters and multi-parameter phase space is obtained, and optimal fusion of phase points is performed through combination of the Bayes estimation theory in the multi-parameter phase space so that fused phase space corresponding to the multiple traffic parameters is obtained; chaos analysis is performed on the time sequences in the fused phase space, and chaos prediction is performed on the traffic roads through combination of an RBF neural network when the time sequences of the fused phase space present chaos characteristics through analysis. Compared with a conventional single-parameter time sequence prediction method, a better prediction effect can be acquired by the traffic state prediction method so that predictability and precision of the traffic state prediction method are relatively high.

In an interpolation synchronous detection method in a radio communication system in which a pilot symbol whose phase point is known is periodically inserted in an information signal to allow interpolation synchronous detection on a receiving side, synchronous detection of the information between the pilot symbols is performed by linearly interpolating a transfer function estimated from the pilot symbols respectively located before and after the information signal, and a reception sampling point timing used for the synchronous detection is updated at the middle point between the pilot symbols respectively located before and after the information signal. A radio communication system is also disclosed.

This invention provides a development platform of the application software, and it includes business kind module which is used to store at least one business and containing working element of group; phase fellow module which is used to found and store at least one phase fellow; phase point founding module which is used to judge the corresponding working element of the operation and sets the working element the phase point of the phase fellow; migrating relation founding module which is used to found the migrating relation between the phase point according to the working element property of all phase point in the phase fellow; coding module which is used to code the phase fellow to phase profile. This invention also provides the formation method of application software, running platform and running method. By this invention, self equipment can execute many business fellows which are independent, and the adjusting and updating can be done to the corresponding module, the updating is convenient and the other module and business can not be affected.

A method for performing four-dimensional virtual endoscopy, includes capturing a heart image sequence of a patient by an imaging equipment and a electrocardiagram signal displaying a cardiac cycle of the heart. The electrocardiagram signal is used to select images to derive the corresponding three-dimensional view successively in the corresponding cardiac cycle with the corresponding heart image in the common and selected phase point of each corresponding cardiac cycle.

This invention is related to a terminal apparatus that can normally transmit an upstream response signal. A response signal generating unit (212); generates response signals on the basis of a setting rule in which pattern candidates of success or failure in the reception of downstream allocation control information and downstream data are associated with the phase points of response signals and further in which the phase point of one response signal associated with an arbitrary pattern of success or failure in the reception during the second communication has been set to be identical with the phase points of two response signals associated with pattern candidates for which the pattern of success or failure in the reception at PCC during the first communication is identical with the arbitrary pattern and for which all of the receptions of downstream allocation control information have been failed at SCC.

The invention provides a new method for preparing a phosphorus-nitrogen-carbon trinity intumescent flame retardant with hexamethylolmelamine, melamine and phosphorus halide as the main raw materials and an inert organic solvent as the reaction medium. The reaction of methylol melamine and phosphorus halide in an inert organic solvent to obtain an esterification product; then adding water to the esterification product for hydrolysis, after the organic phase and the aqueous phase are separated, the organic phase is separated to obtain a hydrolyzate solution; the hydrolyzate Melamine is added to the solution to form a salt, and a white precipitate is produced to obtain hexamethylol melamine phosphate melamine salt. The compound molecule contains three elements of phosphorus, nitrogen and carbon, that is, an intumescent flame retardant of the trinity of phosphorus, nitrogen and carbon. Since an inert organic solvent is used as the reaction medium, the preparation method is convenient to operate and is conducive to realizing industrial production. Excellent combustion performance.

The invention discloses a brushless direct current motor counter electromotive force phase point detecting method. The method comprises the following steps of: connecting three stator windings of a motor onto a control power supply to apply a voltage to the three stator windings of the motor to ensure that one winding is connected to the positive electrode of the control power supply after the reversing is carried out every time; connecting a second winding to the negative electrode of the control power supply; ensuring that a third winding is in a power-losing state; detecting voltages Va, Vb and Vc at the grounding ends of the three stator windings to ensure that the counter electromotive force E is equal to (Va+Vb+Vc)-3Vd<c/2>; judging a zero crossing point of the counter electromotive force of a brushless direct current motor according to the change of the positive electrode and the negative electrode of the counter electromotive force; and delaying an electric angle of 30 degrees from the zero crossing point of the counter electromotive force of the brushless direct current motor to obtain a phase change point. The brushless direct current motor counter electromotive force phase point detecting method has the advantages of low cost and high detection reliability, an external comparator is not needed, and the safety reliability of operation of the motor is improved.

A communication system (30) includes a transmitter (32) which generates transmit phase points (54) defined to be the vector sum of two or more QPSK signals (76, 78). Forward error correction encoding (48) is performed independently for the QPSK signals. In a receiver (34) alternate hypotheses are formed about the potential values that might have been transmitted for at least one of the QPSK signals, and offset phase points (68) are defined for each hypothesis. Each offset phase point has the effect of cancelling at least one of the two or more QPSK signals from the combined communication signal (36). Branch metrics (70) are responsive to Euclidean distances between all offset phase points (68) and all noise-free phase points that correspond to the QPSK signal about which no hypotheses are formed. A decoder (72) is configured to accept and reject the hypotheses in addition to counteracting noise.

The invention discloses an online dynamic balance correction method of a large-size draught fan impeller, belonging to the field of equipment overhauling, and aiming at reducing impeller assembling and disassembling procedures and shortening an overhauling period. The online dynamic balance correction method comprises the following steps: A, connecting one end of a vibration detection balancing apparatus with a driving end of the draught fan impeller on line and connecting the other end of the vibration detection balancing apparatus with a driven end of the draught fan impeller; marking a vibration starting phase point on a wheel disc of the impeller; B, starting the vibration detection balancing apparatus and detecting an original vibration amplitude and an original phase of a bearing bush at the driving end of the draught fan impeller; C, calculating balance counter weight needing to be added and a phase of the added balance counter weight; and D, adding the balance counter weight to the back surface of the impeller. According to the online dynamic balance correction method of the large-size draught fan impeller, after the balance counter weight and the mounting position of the balance counter weight are measured in a large-size draught fan installation site by utilizing the vibration detection balancing apparatus, the balance counter weight is mounted on the impeller and the draught fan impeller does not need to be assembled and disassembled, so that the impeller assembling and disassembling procedures are reduced and the overhauling period is shortened.

The invention discloses an aortic valve semi-automatic segmentation method based on a CTA dynamic image, and the method comprises the steps: obtaining CT angiography image data under electrocardio gating, carrying out the division of 20 time phases, and carrying out the following steps for an image of each time phase point: step A, segmenting Valsalva sinus according to the upper and lower boundaries of the root of an aorta; and step B, segmenting the aortic valve from the Valsalva sinus. According to the method, the feature extraction range in the CTA image is expanded, so that more completeanatomical details are presented, and the working efficiency and safety during an operation are further improved.

The invention relates to a method for positioning an assembly phase point of a balancing shaft. The method is characterized by comprising the following steps that: two ends of the balancing shaft are supported on special tool equipment in a laying mode in order that an axial lead of the balancing shaft is horizontal; a balance weight of the balancing shaft is positioned in a free overhanging state; when the balancing shaft is in static balancing, the balancing shaft is fixed; a process hole is processed on the upper part of the balance weight on the end face of a fluted disc of the balancing shaft in order that the process hole is positioned in a vertical plane which passes through the center of gravity of the balance weight; with an axial centre as a centre and the process hole as a benchmark, a marker is marked on a set angle position of the fluted disc end face of the balancing shaft in the clockwise direction or counterclockwise direction; and the marker is the assembly phase point of the balancing shaft. The assembly phase point of the balancing shaft determined by the method is not influenced by the foundry process, manufacturing error and uneven materials. The vibration of an engine after the balancing shaft is assembled is obviously reduced.

The invention relates to a phase hunting detection method for a permanent magnet planar motor adopting a switch Hall array. The method is characterized in that: a Hall array consists of M (M is an odd number and more than or equal to 3) switch Hall sensors, wherein the Hall array is vertical to the horizontal force direction of a driving unit where the coil is positioned; the switch Hall sensors in the Hall array are arranged at equal intervals which is an even number times the pole pitch, are parallel to a permanent magnet array and used for measuring the component of the magnetic flux density in the direction vertical to the movement direction of the planar motor. All the switch Hall sensor signals in the Hall array are added up and then an judgment is made to determine whether the sum is greater than M/2 so as to acquire an output signal 0 or 1; the output signal is kept unchanged when the Hall array moves in the direction vertical to the horizontal thrust direction of the corresponding coil; the output signals 0 and 1 are alternated when the Hall array moves in the horizontal thrust direction of the corresponding coil; and the current zero-crossing point (phase shifting point) in the driving coil is determined. The method changes the phase hunting detection of the permanent magnet planar motor in two dimension into superposition of two one-dimensional phase hunting detections to realize the planar phase hunting detection.

The invention provides a PSK receiver and a receiving method thereof, a PSK demodulating circuit and a communication apparatus, which can restrain the increase of the circuit scale and perform demodulation on phase modulated signals. As a solving means, an in-phase component (I) and an quadrature component (Q) contained in a reveived signal are converted to a 1-bit digital signal by 1-bit A/D converters (107, 108) respectively, when a phase point distance I-axes determined by the in-phase component (I) and the quadrature component (Q) is used as a predetermined region, a BPSK demodulator (110a) demoluates the received signal only according to the in-phase component (I), and when a phase point distance Q-axes determined by the in-phase component (I) and the quadrature component (Q) is used as a predetermined region, the BPSK demodulator (110a) demoluates the received signal only according to the quadrature component (Q).

The invention relates to high performance leadless piezoelectric ceramics and its preparation technology, the preparation technology comprises the following steps: burdening titanium dioxide, barium carbonate and stannic oxide according to stoichiometric ratio of 0.89: 1: 0.11, ball milling, pre-burning, performing secondary ball milling, granulation granulating and molding, covering by a crucible finally, putting in a sintering furnace, heating to the temperature of 500 DEG C by a speed of 2 DEG C/min, insulating for 2 hours and dumping, then heating to the temperature of 1400 DEG C at the speed of 4 DEG C/min and insulating for 4 hours, and then cooling in furnace to the room temperature to obtain the required leadless piezoelectric ceramics. The leadless piezoceramic material has high dielectric and piezoelectric performance at quasi four-phase point, the relative dielectric constant of the material can reach 75000 which is 6-7 times of the dielectric constant of pure barium titanate at the Curie temperature, the piezoelectric coefficient d33 can reach 697pC/N which is 5 times of the room temperature piezoelectric coefficient of the pure barium titanate, and the data can be the highest data in that of the leadless piezoceramic material.

The invention relates to a method for determining corresponding relation of a phase sequence of a stator winding of a brushless direct current motor and an encoder and a detecting device. The method determines the phase sequence of the stator winding according to a zero crossing point of voltage among the stator windings based on the potential zero crossing point of a counter electromotive force and a commutation point (rising edge and descending edge of an output signal of the encoder); and determines the corresponding relation between an interface of the encoder and the stator winding according to the corresponding relation of the zero crossing point of the stator winding and the rising edge and descending edge of an output signal of the encoder. The device provided by the invention uses a microprocessor system as an operational processing unit, combines a periphery hardware detection unit to detect the zero crossing point of voltage among the stator windings and the rising edge and descending edge of the output signal of the encoder so as to judge the phase at one time and determine the corresponding relation between the windings of phases and the interface of the encoder. The invention avoids the problem caused by delay of an electric angle, has the advantages of intuitive and accurate steps and simple structure of the detection device, and is appropriate for detection and judgment of the brushless direct current motor.