84 results about "Timing mark" patented technology

A disk drive is disclosed including a disk having a first and second set of time-based servo patterns. The first set of time-based servo patterns comprises a first cyclical pattern that repeats radially over the disk, and the second set of time-based servo patterns comprises a second cyclical pattern that repeats radially over the disk, wherein each cyclical pattern comprises a plurality of timing marks. One of the first cyclical patterns overlaps at least part of a first servo track, and one of the second cyclical patterns overlaps at least part of the first servo track. At least one of the first and second set of time-based servo patterns are demodulated by detecting first and second time intervals relative to the timing marks, and a control signal for actuating the head is generated in response to the first and second time intervals.

A magnetic recording disk drive has head positioning servo sectors with servo sector numbers (SSNs) that are not recorded on the disk. The SSNs are encoded through the use of multiple servo sector types that are arranged in a specific sequence around the data tracks. The different servo sector types are identified by unique types of servo timing marks (STMs), which are used to locate the servo sectors. The SSNs that are used to identify the servo sectors on the track form a set or code of m fixed n-bit patterns. A SSN is determined when the STM types read from n sequential servo sectors match one of the fixed SSN pattems. A set or code of m servo sectors, where each servo sector is identified by a unique SSN pattern having length n, is denoted as an (m,n,d) code, where d is referred to as the minimum Hamming distance of the code. The Hamming distance between two patterns refers to the number of locations that are different between the two pattems.

The invention discloses a synchronous displaying method and system of a tiled display screen. According to the method, when receiving synchronous answering signals, video output units start a timer by using a reference clock; the video output units generate timing marks at regular preset intervals through the timer; the video output units synchronously display received image blocks according to the timing marks. The synchronous answering signals are fed back to the video output units by a synchronous control unit which receives synchronous request signals sent by all video output units; the reference clock is acquired from the synchronous control unit after the synchronous control unit is powered on. The synchronous displaying method and system according to the technical scheme has the advantages that fault tolerance of the system is improved, and synchronous displaying accuracy of the system is improved.

The invention relates to a fixed type automatic volume measurement system and a measuring method of the fixed type automatic volume measurement system. The fixed type automatic volume measurement system is an automated measurement and calculation system based on multi-sensor integration. According to the system, multiple sensors are mainly used for synchronous control of a collector, a control tag reader and a high-speed laser scanner, and are in synchronous communication with an industrial personal computer to achieve data collection. Collected data are processed primarily by a controller to filter invalid data and transmitted to the industrial personal computer rapidly after being marked in a real-time mode with timing marks. A three-dimensional coordinate is computed through calculation processing software running in the industrial personal computer and by aid of the three-dimensional coordinate computational algorithm, vehicle-mounted material stack body modeling is carried out by combining the three-dimensional modeling algorithm, and then the volume of vehicle-mounted materials to be measured is calculated. Therefore, the fixed type automatic volume measurement system and the measuring method of the fixed type automatic volume measurement system have the advantages that a traditional method that a material transport vehicle is guarded all day long and recorded manually is replaced by a method that the material transport vehicle can be identified quickly and automatically, the volume of the vehicle-mounted materials can be measured quickly and accurately, and the material transport vehicle and the materials can be managed effectively.

Seamless handover of a communications signal from a first satellite to a second satellite is provided when the satellites are at orbital positions which coincide. Timing marks are inserted simultaneously in signals transmitted through the satellites, and signals received from the satellites compared to determine the difference in path length. Handover occurs when the path length difference is zero and the two signals are perfectly synchronized. Interference between the signals transmitted through the two satellites is avoided by using different transmission modes, such as different carrier frequencies, orthogonal senses of polarization, or digital signals with uncorrelated spreading codes. Using these different transmission modes in the right- and left-leaning orbits of a Cobra Teardrop system also permits overlaying multiple teardrop patterns, at longitudinal spacings comparable to the Basic Cobra system, as well as closer in-track spacing of satellites. The result is over an order of magnitude increase in global system capacity.

Methods and systems for training cognitive skills are disclosed. The methods and systems include: providing, via a computing device and user interface display, musical rhythm training comprising at least one trial comprising: displaying on the user interface display, via the user computing device, a rhythm track comprising at least one stationary beat timing mark and at least one moving beat timing mark repeatedly moving along the rhythm track at a uniform speed; receiving via a user interface input an indication from the user that the user perceives a moving beat timing mark to be coincident with a stationary beat timing mark; and providing, via the user interface, an indicator that the user is correct or not correct.

An apparatus and method for compensating for variation in sample rate in a disc drive having a rotating disc and a head that is positioned over the rotating disc is provided. The disc includes at least one track that has multiple consecutive sectors. A sample rate value between timing marks of each pair of consecutive sectors of the multiple consecutive sectors is computed to obtain a sequence of sample rate values. A sequence of timing error values is computed as a function of the sequence of sample rate values and a nominal sample rate value. Data related to the sequence of timing error values is utilized to compensate for variation in sample rate values.

The invention discloses a satellite time serving all-in-one machine and time serving method thereof. The remote end and the close end of a satellite for serving time are integrated into a whole body and interact a differential signal with time-served devices through cables; as the reliable transmission distance of the differential signal is larger than that of a single-end electric characteristicsignal, the effective transmission of a timing mark signal and time information can be guaranteed even if the transmission distance of the cables between the time-served devices is more than 10m; meanwhile, the timing mark signal error caused by the expansion of the transmission distance can be reduced through measuring time delay of the cables and correcting the time delay of the timing mark signal according to the measuring result, therefore, the timing mark signal can be guaranteed to be transmitted accurately; and moreover, as the remote end and the close end are integrated into a whole body, various problems caused by that the length of radio frequency cables between the remote end and the close end exceeds 100m are solved. Therefore, the invention can simultaneously guarantee the convenience for engineering installation and the time serving reliability.

Patterned discrete track magnetic media compatible with the constraints imposed by the use of self-assembly technology are described in which the PES servo portion of each servo sector has at least one offset segment used for the position error signal (PES). The downtrack length of the PES offset segment systematically varies according to the track position to encode information about the track position usable by the servo system. The downtrack length of the offset segment and, therefore, the time between the corresponding signal shifts is systematically varied from the inner diameter (ID) to the outer diameter (OD) according to the track position to provide coarse information to the servo system even if part of the track ID code cannot be read. Alternative embodiments include a preamble timing mark formed by another offset segment. A self-servo writing method is described using the preamble timing marks.

A method and apparatus are provided for implementing improved phase alignment in a direct access storage device (DASD). A reference clock input is received for providing a system clock. Locking to a synchronization field of a readback signal is performed by adjusting the phase of the system clock. A timing mark is detected and then the adjusted phase of the system clock is held. Responsive to the detected timing mark, a reference delay of a predefined number and fraction of system clock periods is identified. At an end of the reference delay, a write circuit accepts data and generates write signals for a write operation. The phase of the system clock is adjusted corresponding to a predefined fractional delay and is used to run a programmable counter that counts the predefined number of system clock periods corresponding to the reference delay.

The invention relates to a time information detection method of an output signal of a satellite synchronization time service device. The method comprises the following steps of: setting output opening time T of a pulse signal output end (4) of a controllable timing mark signal source (1) and setting the output opening time T as an on-time trigger mode; outputting a pulse initiation 1pps synchronous to a satellite at a given time T (27) in cooperation with the controllable timing mark signal source (1); and triggering an oscilloscope (2) to capture the output signal of the satellite synchronization time service device (3) so as to finish the time information detection of a serial message of the satellite synchronization time service device and the detection of the correctness of B code time information of the satellite synchronization time service device. The method is a detection method which can more comprehensively test the technical performance of the satellite synchronization time service device of a power network sub-station, thus the time synchronization accuracy of secondary equipment can be ensured better.

Embodiments of the present invention provide a technique to correct timing mark position error in self-servo write (SSW). In one embodiment, a method of correcting a timing mark position error of a SSW pattern of a disk drive comprises writing a plurality of timing mark bursts over a plurality of steps on a disk, the plurality of timing mark bursts including at least one misaligned burst having an intentional misalignment in a first step with respect to a corresponding burst in a neighboring second step; reading the misaligned burst and the corresponding burst at a seam between the first step and the second step to obtain a measured burst amplitude; and using the measure burst amplitude to obtain a timing mark position error, which may involve comparing the measured burst amplitude and an expected burst amplitude computed based on the intentional misalignment between the misaligned burst and the corresponding burst to obtain a timing mark position error.

The present invention belongs to the field of computer synchronication technology, in particular, it relates to a synchronous processing method and its equipment. Said method includes: synchronous processing method, program driver drive method of L structure CPU and program drive method of L structure CPU after the synchronous processing device is added, and said equipment includes N timing marks, input buffer storage register, output buffer storage register, busy/idle marks of input/output buffer storage registers and operation/control component.

An ignition timing device for measuring ignition timing that includes a focused light source, a securing member, an ignition indication sensor, and a control box. The focused light source permanently or removably attaches to an engine or engine compartment in close proximity to a rotating portion of the engine having marks that, when aligned with fixed timing marks or a reflection point, indicate ignition timing. The ignition timing device flashes the focused light source in response to receiving ignition detection signals from the ignition indication sensor. The control box has a capability to advance or retard the flashing of the focused light source in response to the ignition signal to allow advance or retard of engine ignition timing through, for example, adjustment to the distributor of the engine.

The invention discloses an optical engine timing mechanism, an optical engine and an optical engine timing method. A flywheel assembly is introduced into a cylinder body of the optical engine, the flywheel assembly is connected with a crankshaft and a power measurer, the plane outer of the flywheel assembly is provided with a 0-360-degree crankshaft rotary angle scale plate; a crankshaft positioning pointer is used for pointing timing indicator scale position on the scale plate to determine an upper stop point position of the piston, and is matched with a cam shaft, the timing gear and a corresponding timing indicator position on the cylinder to realize selecting an optical engine timing position, so that the timing position determination of the optical engine is realized in a relatively visual, convenient and precise mode, and the dismounting and mounting efficiency of the optical engine is improved.

The invention provides a delay detection device and a detection method of the delay detection device. The delay detection device and the detection method are based on automatic transmitting and automatic receiving. The detection method includes the steps that a starting module receives external control to trigger spread spectrum transmitting signals, a set of signals coded in a spread spectrum mode through pseudo-random codes are generated, and a timing mark is generated; signals generated in the mode that the spread spectrum signals are coupled through a radio-frequency channel module are transmitted to an A/D conversion circuit, A/D conversion is carried out on the signals through the A/D conversion circuit, then the signals are transmitted to a digital correlator, and the digital correlator completes signal capturing and generates a correlation peak; time between the starting mark and the correlation peak is calculated in real time through a calculating circuit, and delay of the signals flowing through the modules is calculated. The delay detection device and the detection method can be widely applied to systems, such as a burst communication system, with delay estimation, delay detection has the advantages of being automatic, adaptive and the like, the batch assembling performance and the use performance of products are accordingly improved, and the delay detection device and the detection method are particularly suitable for the batch-assembling products.

The method comprises: according to the link state information about multi-plane switching network, constructing the network topology structure of the multi-plane switch network; said network topology structure of the multi-plane switch network is used for confirming the global time scale dispensing device; said global time scale dispensing device is used to dispense a unique global time scale to each traffic manager (TM) in said multi-plane switching network; after receiving said global time scale, each TM sends and receives cells. Said system thereof comprises: topology constructing unit, global time scale dispense device confirming unit, global time scale dispensing unit, and at least one TM.