44 results about "Cyclic number" patented technology

A packet switching system includes a forwarding processing unit determining a destination of an input packet by analyzing the input packet and outputting it as an output packet, the forwarding processing unit comprises an ingress interface card checking if the input packet has a sequential cyclic number and an egress interface card creating a sequential cyclic number and assigning it to the output packet.

The invention discloses a SiCf/SiC ceramic-based composite material with a composite interface. The SiCf/SiC ceramic-based composite material with the composite interface has the characteristic of comprising a CVD-SiC coating, a PIP-SiC matrix, the composite interface and SiC fiber, wherein the CVD-SiC coating is a silicon carbide coating which is prepared by using a chemical vapor deposition method and has a thickness of 100-500 [mu]m, the composite interface is formed through alternate cyclic overlapping of arbitrary two or three of a BN interface, a ZrO2 interface, a LaPO4 interface and a SiC interface, and the cyclic number is 3-5 times; and the PIP-SiC matrix is silicon carbide formed through in-situ pyrolysis of polycarbosilane, the volume of the SiC fiber accounts for 40-60% of thevolume of the composite material, and a pyrolytic carbon layer of 5-20 nm thick is formed on the surface. The preparation method comprises the steps: preparing the multi-layer composite interface on the surface of the silicon carbide fiber by using different preparation processes, then filling a SiC matrix by using a PIP method, and finally preparing a surface SiC coating by using a CVD method. The prepared SiCf/SiC ceramic-based composite material has high toughness, high oxidation resistance and a simple preparation process.

The invention relates to a five-path laser radar for a vehicle and a control method of the five-path laser radar. The five-path laser radar comprises a radar controller, and five paths of transceivers in fan-shaped arrangement, wherein each path of transceiver respectively comprises a laser emitting lens tube and a laser receiving lens tube, the center axes of the five paths of transceivers are all crossed at the same point on the same plane, and in addition, the included angle between the adjacent laser emitting lens tubes is identical. When the five-path laser radar is used, the five paths of transceivers are firstly controlled for sequentially emitting and receiving laser pulses, the interval time is identical, then, the passing time t between the emitting and the receiving of each path of laser pulses is calculated, next, the t is subjected to twice screening through a formula that t is greater than or equal to t<min> and smaller than or equal to 1mus and the variance, the threshold and the circulation number group, then, the qualified t average value in the cyclic number group is calculated, and finally, the region of obstacles, the distance between the obstacles and the vehicle and the relative speed are determined according to the average value, so obstacles are avoided. The design has the advantages that the scanning period is short, the structure is simple, in addition, the cost is lower, the anti-shock performance is higher, and the detection distance, the range and the precision can meet the vehicle requirements.

A computer-implemented method is designed for on-demand printing on digital printers of a coding pattern to code data on a surface. The coding pattern comprises a plurality of parallel number sequences which represent different rotations of a cyclic number sequence. The method could involve retrieving a digital representation of the coding pattern, and identifying the rotations therein to derive shift information which designates a phase difference between each rotation and the cyclic number sequence. In the printing operation, all the different rotations may be represented by the cyclic number sequence embodied as at least one code block image. This code block image is repeated in accordance with the shift information to form a printable image in the printer.

A method of providing a position code on a surface, which position code codes a plurality of positions on the surface. A cyclic number series is used, which has the characteristic that the position in the number series of each number sequence of a first predetermined length is determined unambiguously. The number series is printed out a plurality of times across the surface, different rotations of the first cyclic number series being used so that displacements arise between adjacent number series. The surface is divided into a plurality of code windows, which comprise at least three number series and have one number series overlapping one number series of adjacent code windows. The position of the code windows in the x-direction is coded by means of the displacements between the cyclic number series belonging to the code window. A second number series is used for coding in the y-direction. The invention also concerns a method and a device for determining the position, and a device and a computer program product for implementing the method.

The invention discloses a method for testing reciprocating seal wear life of an O-shaped rubber seal ring, comprising the following steps of: step 1, testing material property of a seal element, wherein the material property test comprises a hardness test, a swelling test, and a friction coefficient test; step 2, performing a determination test on the life of the seal ring to obtain the cycle number when the seal ring fails, and determining the wear amount of the failed seal ring; and step 3, performing the parameter modification test of a sealing life model, obtaining the change law of the wear amount of the seal ring with time based on the dynamic seal wear life test, determining the detection step period of the parameter correction test based on failed cycle number, separately exploringthe speed and load to achieve the correction of the parameter K under different materials.

A computer-implemented method is designed for on-demand printing on digital printers of a coding pattern to code data on a surface. The coding pattern comprises a plurality of parallel number sequences which represent different rotations of a cyclic number sequence. The method could involve retrieving a digital representation of the coding pattern, and identifying the rotations therein to derive shift information which designates a phase difference between each rotation and the cyclic number sequence. In the printing operation, all the different rotations may be represented by the cyclic number sequence embodied as at least one code block image. This code block image is repeated in accordance with the shift information to form a printable image in the printer.

The invention discloses a power battery SOH estimation method considering multi-factor influence. The method includes taking 25 DEG C, 0.3 C and SOC as standard working conditions at 40-60%, and performing a charging and discharging test under the working conditions so that the number of cycle life cycLife0 under the standard working conditions can be obtained; performing the charging and discharging test under different SOC ranges, different temperatures and different magnification conditions so that the number of the cycle life under different working condition environments can be obtained,and comparing the cycLife0 with the number of the cycle life under different SOC ranges, different temperatures and different magnification conditions so that ratio tables (sTable, tTable and iTable)can be obtained; during the running of an automobile, equivalently converting the number of the cycles under current temperatures, magnification and SOC into the number of the cycles under the standard working conditions according to the ratio tables (sTable, tTable and iTable); and utilizing a cyclic number conversion algorithm to calculate SOH under the equivalent standard working conditions. The method is simple in algorithm and high in calculating precision, and can calculate the SOH of all single cells, and therefore, management on the cells can be realized.

The invention relates to a material cyclic hardening behavior testing method in welding process. The testing method comprises the following steps: 1) mounting a test sample on a high-temperature fatigue testing machine, heating the test sample to set temperature in a certain heating speed by using an annular infrared heating furnace, and preserving the heat of the test sample; 2) performing multi-stage load cyclic tensile-compression test by adopting strain control; 3) drawing a stress-strain curve graph of the cyclic tensile-compressive test, establishing a relation of the maximum tensile stress and cyclic number under the set temperature, and determining a strain hardening characteristic based on the maximum tensile stress change tendency; 4) computing the relative internal stress according to the cyclic stress-strain curve of the cyclic tensile-compressive test; and 5) taking a relative internal stress mean of the temperature under a test sample material mechanics melting point as the proportion of the test sample material follow-up hardening model according to the relation curve of the relative internal stress and the test temperature. Compared with the prior art, the testing method disclosed by the invention has the advantages of qualitatively evaluating the cyclic hardening characteristic and quantitatively determining the proportion of the follow-up hardening model.

The invention discloses an operation method for stepping constant torque control on a permanent magnet brushless direct current motor, and relates to a motor control technology. A DSP (digital signal processing) control module in a device used in the method calculates a current vector required by control according to a set cyclic number of beats bH, a number of advancing steps k, a given electromagnetic torque T* and an amplitude value of a current vector (is) corresponding to different space positions and converts the current vector required by control into a logic level pulse width modulation signal by a current control method so as to control on and off of a switching tube of a three-phase bridge type inversion circuit in a power circuit, so that stepping constant-torque control on the permanent magnet brushless direct current motor is realized. According to the method, a stator current vector synthesized by three-phase current is dispersed at an electric angle space position according to a certain cyclic number of beats so as to obtain a dispersed current vector for controlling operation of the motor; by increase of the cyclic number of beats, a smaller stepping angle can be obtained, and the position resolution is improved; therefore, the positioning precision of the permanent magnet brushless direct current motor can be improved under the condition of guaranteeing the loading capacity.

The invention discloses an operation method for stepping dispersion control on a permanent magnet brushless direct current motor, and relates to a motor control technology. A device used in the method comprises a DSP (digital signal processing) control module, a power circuit, the permanent magnet brushless direct current motor, an encoder position detection module and an input power module. For the common three-phase permanent magnet brushless direct current motor, a stator current vector synthesized by three-phase current is dispersed and subdivided, and a dispersion positioning position in a space is obtained according to a certain cyclic number of beats, so that positioning control on the motor can be realized by controlling the space position of a stator magnetic field, and the positioning precision of the motor is improved; furthermore, the stator current vector synthesized by the three-phase current is dispersed at an electric angle space position according to a certain cyclic number of beats so as to obtain a dispersed current vector for controlling operation of the motor; by increase of the cyclic number of beats, a smaller stepping angle can be obtained, and the position resolution is improved; therefore, the positioning precision of the permanent magnet brushless direct current motor can be improved under the condition of guaranteeing the loading capacity.

A delay circuit includes: a cyclic number control circuit that generates a third signal based on first and second signals generated based on a trigger signal; a loop circuit in which a plurality of delay elements are electrically connected in series, one output of outputs of the plurality of delay elements is fed back to form a loop, and the third signal is input to the delay element at an initial stage; and a latch circuit that latches output values of the plurality of delay elements as latch signals. The second signal is one output among the outputs of the plurality of delay elements. The loop circuit stops the feedback when a cyclic number of loops reaches a prescribed cyclic number.

The invention relates to a machine vision equipment communication verification method based on PLC serial communication. The method includes the following aspects: 1) a PC side which performs cyclic numbering on each picture of an object to be detected which is obtained by a camera, encodes a detection result of each picture and the encoded detection results are pressed into a detection result stack from a rear end according to a time sequence, a detection result sending thread being developed; and 2) a PLC side which performs cyclic numbering on each photographing signal, and establishes a removal moment stack.

The invention discloses a control system and method of an online detection device for magnetic shoes. A PC in the control system comprises a first numbering unit used for cyclic numbering when a firstphotoelectric sensor senses the magnetic shoes, an analysis unit used for acquiring a judgment result according to magnetic shoe information acquired by a 3D contourgraph, a first sending unit used for sending serial numbers of the magnetic shoes and the judgment result to a PLC, and a first receiving unit used for receiving the serial numbers, sent from the PLC, of the magnetic shoes; and the PLC comprises a second numbering unit used for numbering when the first photoelectric sensor senses the magnetic shoes, a second sending unit used for sending serial numbers, numbered by the second numbering unit, of the magnetic shoes to the PC, a second receiving unit used for receiving the serial numbers of the magnetic shoes and the judgment result sent from the PC, and an output unit used for controlling a sorting device to work according to the received serial numbers of the magnetic shoes and the judgment result when a second photoelectric sensor senses the magnetic shoes. According to the control system and method, sequential control is conducted on the online detection device for the magnetic shoes, equipment which operates abnormally is diagnosed and corrected, configuration requirements are lowered, and qualified products and unqualified products are accurately sorted.

The invention provides a rendering acceleration method and device for an H5 list, equipment and a medium. The method comprises the steps of obtaining the screen height and the virtual dom height value of each piece of data; sequentially obtaining the actual data height and the actual data number of the first screen and the second screen through a cyclic data height accumulation method, recording the actual data height and the actual data number, and putting the data of the first screen and the second screen into a virtual cache; when the page triggers pull-up scrolling, loading data of a subsequent screen to the virtual cache one by one through the cyclic data height accumulation method; or when the page triggers pull-down scrolling, loading the historical data to the virtual cache screen by screen, however, the data of the three screens, namely the data of the current screen, the data of the previous screen and the data of the next screen, are only reserved in the virtual cache in each time of loading. According to the invention, the number of virtual caches of the screen is obtained by accumulating the data heights one by one, and rendering is optimized, so that the problems of unsmooth screen rolling and screen jamming caused by the problem of the data content height are solved.

The invention discloses a constant force device of a watch. The constant force device comprises a constant power part and an anti-sway part, wherein the constant power part is in engaged connection with an anti-sway gear shaft of the anti-sway part through a driving wheel sheet; and the anti-sway part is used for preventing a positioning wheel sheet of the constant power part from rotation when the torque required by a main spring is smaller than the torque required by a middle spring so as to stop the watch from swinging. The invention has the advantages that: an arresting device is added onthe constant force device, the watch can stop swinging as earlier as possible when a brake wheel is free from the control of a fork tile, namely the middle spring cannot reach the upper limit of preload, the unchanged preload cyclic number of the middle spring is ensured when the watch is wound up again, so relative constant torque corresponding to the elastic force of the middle spring can be ensured to be transmitted to an escape wheel. The structure is simple, the running is stable, and the technique is good, so the constant force device can stably and reliably work.

The invention discloses an SOE information management method and a storage device thereof. The method comprises the steps of storing SOE information in a cyclic data storage area, the storage contentof each piece of SOE information comprises time scale information and a flipping character, the flipping character represents the number of times that the cyclic data storage area is covered, and thelength of the space occupied by the flipping character is smaller than the length of the space occupied by the time scale information; and traversing the SOE information according to an address sequence from a starting address to an ending address of the cyclic data storage area, searching different flipping symbols, and determining the SOE information stored at the earliest time. The embodiment of the invention at least has the following beneficial effects: the calculation amount and the space occupation during comparison are reduced, the CPU processing time is reduced, and the processing efficiency is improved, so that the safe and effective operation of the low-performance power grid equipment is ensured.

A display device and an operation method. The display device comprises a display panel and a display panel control module. The display panel control module ranks required two-dimensional images in sequence according to a cyclic number sequence formed by a preset number sequence, and each two adjacent numbers in the preset number sequence represent two adjacent angles of view. The display panel control module also replaces a two-dimensional image to which at least a number corresponds in the preset number sequence with a mixed image containing two-dimensional images of at least two different angles of view, synthesizes image data of a three-dimensional image accordingly, and controls a display panel to display the three-dimensional image on the basis of the image data of the three-dimensional image, wherein image data of each mixed image contains part of image data of the two-dimensional images of angles of view to which at least two numbers correspond in the preset number sequence.

The invention provides a method for determining the minimum number of times of a rapid fatigue test. The method specifically comprises the steps of 1, determining the reliability R of a part under thespecified service life; selecting a logarithm value lg(sigma) of the load sigma and a logarithm value lg(NR) of the fatigue life NR with the corresponding reliability R, forming a double logarithm straight line between the logarithm value lg(sigma) of the load sigma and the logarithm value lg(NR) of the fatigue life NR, and converting the load spectrum into the total equivalent cycle number of the single-stage load of the maximum-stage load, namely, the minimum number of times of the rapid fatigue test. The minimum number of times of the rapid fatigue test obtained by the method does not needto be multiplied by a multiple t like the number of times of fatigue calculated according to the current theory, and t is an empirical value obtained by long-term exploration and can be used as the minimum number of times of the rapid fatigue test. Therefore, for parts made of novel materials, the time cost spent on long-term exploration for obtaining t is greatly saved.