838results about How to "High time accuracy" patented technology

The invention concerns a method for generating calibration signals for calibrating spatially remote signal branches of antenna systems. In accordance with the invention, a base signal is generated by mean of a timer and is fed to a distributor unit for distribution of the base signal to amplifier circuits on the signal distribution lines respectively allocated to them. At the output of the amplifier circuits, a calibration signal is generated respectively via amplification of the base signal within a specifiable upper amplitude limit and a specifiable lower amplitude limit, which is fed to the respective feed-in point of the signal branch to be calibrated that is allocated to an amplifier circuit.

The invention relates to a method for a particularly precise execution of a measurement or control action and to a corresponding controller (9). A temporally periodic synchronization signal (S, S′ ) generated by a receiver (9) based on a timing reference signal (Z) is divided by a switching frequency (F) generated by a timing generator (14) into a plurality of switching intervals (I_n). A switching command (C_n), which triggers a corresponding switching process of the action, is associated with each switching interval (I_n). Several measurement and control actions can be accurately synchronized by performing each action with the aforedescribed method using a common timing reference signal (Z).

A location-based mobile workforce management system includes a branch reporting tool (BRT) module, a maintenance and acquisition planning (MAP) module and a safety locator module operatively coupled together and delivered via a web server for access by a plurality of wireless hand-held devices respectively associated with a plurality of service technicians in a maintenance and repair organization. The hand-held devices are configured to supply time-based location readings to a locator service, which in turn supplies those readings to the safety locator module. The central system implements an automated method for collecting travel time to a work site, time spent on-site and travel time from the work site to the next work site and calculating paid time for the technicians as well as generating portal-to-portal billed time invoices for billing customers. Among other features, the safety locator verifies technician travel time.

The invention discloses a time synchronization method and a time synchronization system for synchronous messages of IEEE1588 master-slave clocks of an intelligent transformer substation. The method comprises the following steps of: establishing a master clock synchronous message, and sending the timestamp t1 of the sending moment of the message to the clock in a broadcasting manner; recording a receiving moment t2 of the master clock synchronous message; recording an absolute receiving moment TT2 when the master clock synchronous message is received by a slave clock; establishing a slave clock responding message, sending the slave clock responding message to the master clock in a peer-to-peer manner, and recording the timestamp t3 of the sending moment of the message; recording an absolute sending moment TT3 when the slave clock sends the clock responding message; recording an acquiring moment t4 when the master clock acquires the message; calculating a time deviation, and calculating asymmetry errors according to the timestamp t1, the absolute receiving moment TT2, the absolute sending moment TT3 and the acquiring moment t4; and carrying out time correction on the slave clock by the time deviation and the asymmetry errors. According to the time synchronization method and the time synchronization system for synchronous messages of IEEE1588 master-slave clocks of the intelligent transformer substation, the influences of the asymmetry errors can be eliminated, and the time synchronization precision of the master-slave clocks is improved.

Systems and methods are provided for handling time-stamped data. The one or more GUIs may be used to define properties of an event and to associate the event with time-stamped data. The properties of the event defined using the one or more GUIs may include one or more statistical properties that indicate how the event statistically affects the time-stamped data. A time series analysis program may use the time-stamped data and the associated event to generate a mathematical model.

The invention discloses a high performance time digital converter circuit frame, it includes time-delay chain loop which generates low bit data, counter which generates high bit data and a compensating control source; said time-delay chain loop counts the low bit and transfers to said counter in definite period, said counter accumulates the signal with definite period to be the high bit of the time digital converter; Said compensating control source compensates and controls the voltage signal of said time-delay chain loop; The precision is high; the minimum time distinguishing ratio is the one class buffer transmission delay; the speed of processing is quick, when the counting ends, data is obtained, without additional processing time; the output of flip-latch is connected with high bit counter, it guarantees the correctness of circulation and carry; the compensating control source is introduced to guarantee the consistency of system under the same temperature, voltage, craft; the requirement for every module is not high, so it is easy to realize.

An electronic apparatus comprises a display portion and a plurality of oscillators, one of which is a quartz crystal oscillator comprising: a quartz crystal oscillating circuit comprising; an amplification circuit and a feedback circuit. For example, the feedback circuit is constructed by a quartz crystal resonator comprising vibrational arms and a base portion, and having novel shape and electrode construction. Also, the quartz crystal resonator is housed in a package. In addition, from a relationship of an amplification rate of the amplification circuit and a feedback rate of the feedback circuit, an output signal of the quartz crystal oscillating circuit having an oscillation frequency of a fundamental mode of vibration for the quartz crystal resonator can be provided with a frequency of high stability.

A system and method to fully characterize the thermal behavior of complex 3D submicron electronic devices. The system replaces and/or supplements laser-based surface temperature scanning with a CCD camera-based approach. A CCD camera records multiple points of light energy reflected from an integrated circuit to obtain a static temperature measurement. The system is used to non-invasively measure with submicron resolution the 2D surface temperature field of an activated device. A CW laser illuminates a single point on the surface of an active device and a photodetector records the reflected light energy to obtain a transient temperature measurement. The measured 2D temperature field is used as input for an ultra-fast inverse computational solution to fully characterize the thermal behavior of the complex 3D device. The system extracts geometric features of a known device, assessing the system's ability to combine measured results and computations to fully characterize complex 3D electronic devices.

A time synchronization method and system for a multi-core system are provided. The time synchronization method comprises: establishing at least one clock synchronization domain, and respectively allocating each core to each clock synchronization domain; selecting a core with a lowest load in each clock synchronization domain as a master clock synchronization source in the clock synchronization domain, and selecting the clock synchronization domain having the master clock synchronization source with a lowest load as a master clock synchronization domain, while other clock synchronization domains as slave clock synchronization domains; the master clock synchronization domain sending a synchronization deviation detection message to each slave clock synchronization domain, and calculating a time deviation value; when the time deviation value is greater than a permitted deviation value, the master clock synchronization domain calculating a time adjustment quantity and releasing to each slave clock synchronization domain, making adjustment based on its time adjustment quantity.

The invention relates to an industry automation information monitoring technology and discloses a system for synchronously monitoring secondary equipment time of a power supply system, which solves the problems of low accuracy and poor stability of secondary equipment time in the prior art. The main point of the technical scheme is as follows: the system comprises a station monitoring system, a network switch and a secondary equipment unit, the secondary equipment unit is connected with the station monitoring system through the network switch; the system also comprises a time synchronization acquiring device and a time synchronization monitoring background machine, the time synchronization acquiring device is connected with the secondary equipment unit, and the time synchronization monitoring background machine is connected with the network switch and the time synchronization acquiring device. Furthermore, the invention discloses a method for synchronously monitoring secondary equipment time of the power supply system. The invention is suitable for the secondary equipment time monitoring in all power stations and converting stations.

The invention relates to an online detection and control method of the periphery of a filtering rod and a device. The device is characterized by mainly comprising a parallel light source (1), a linear array CCD (Charge Coupled Device) detector (2), a scanning motor (3), a signal processing module (4) and an executing mechanism (6), wherein the parallel light source (1) and the linear array CCD detector (2) are respectively positioned at the two opposite sides of the filtering rod; the scanning motor (3) drives the parallel light sources (1) and the linear array CCD detector (2) to rotate around the filtering rod; the signal input end of the signal processing module (4) is connected with the signal output end of the linear array CCD detector (2); and the signal output end of the signal processing module (4) is connected with the control end of the parallel light source (1), the control signal input end of a motor driver of the scanning motor and the signal input end of the executing mechanism (6) simultaneously. The invention has the advantages that the accuracy is high (the size of the received image element is 10mum), no influence is caused by various interference factors such asvibration, noise, temperature, dust and barometric fluctuation and the like on a site, and the detection result is accurate, stable and reliable.

The invention discloses a single-frequency PPP ionosphere weighting method based on a region CORS. Further improvement of single-frequency PPP moving station precision is mainly restricted by ionosphere delaying, and the correction precision of the regional continuous base station network precision modeling local region ionosphere delaying method to single-frequency users of sparse base station regions is limited. The single-frequency PPP ionosphere weighting method is based on the CORS network, non-combined PPP is conducted on base station data, a region ionosphere model is built, and satellite hardware delaying and receiver hardware delaying are separated to extract the ionosphere delaying value in the tilt direction of the satellite. The single-frequency PPP ionosphere weighting method based on the region CORS takes full advantage of high-precision ionosphere delaying information provided by region station points, and can effectively improve the single-frequency PPP user convergence time and positioning precision and achieve single-frequency PPP user centimeter-level high-precision positioning.

The invention relates to a method and a system for synchronously inserting network time. The method comprises the following steps: S1, a client generating an NTP (Network Time Protocol) timestamp query information packet and sending the NTP timestamp query information packet to an optimal time server, wherein the optimal time server is a time server selected by the client according to an optimal time server algorithm; S2, the client receiving an NTP timestamp answer information packet generated by the optimal time server according to the NTP timestamp query information packet; S3, repeating S1 and S2, and executing S4 when the repeated times is N, wherein N is more than or equal to 5 and less than or equal to 10, the repeated time interval is t, and t is more than or equal to 10s and less than or equal to 30s; S4, the client calculating a time difference data mean by adopting an information packet filter algorithm; S5, the client calibrating the client time according to the time difference data mean; and S6,the client displaying the calibrated client time. By adopting the method and the system, the calibrating precision is high, the system is small, the scheme is easy to realize, and the hardware cost is relatively low.

Methods and apparatus for increasing the accuracy of timing characterization of a circuit including one or more cells in a cell library are provided. One method includes the steps of: performing cell library timing characterization for each of the cells in the circuit for at least first and second prescribed temperatures, the first and second temperatures corresponding to first and second PVT corners, respectively, in the cell library; calculating respective cell delays for the one or more cells in the circuit, the cell delay calculation being a function of temperature for each instance of the one or more cells; and incorporating the cell delay calculation into the timing characterization for each of the cells in the circuit to thereby increase the accuracy of the timing characterization.

The invention discloses a power distribution network failure data self-synchronizing method based on instantaneous amplitude change. According to the power distribution network failure data self-synchronizing method, the instantaneous amplitude of the failure current is calculated by use of the instantaneous sampled values of three-phase currents at the same moment, failure synchronization is realized according to the characteristic that the instantaneous amplitude of the currents after a failure changes suddenly, and whether the failure exists is determined according to whether the magnitude of the sudden change of two cycle current instantaneous amplitudes before and after the failure exceeds a certain threshold; the power distribution network failure data self-synchronizing method has the characteristics of high sensitivity and high speed, and is capable of effectively overcoming the defects of an existing fault detection method, such as slow start, high failure moment detection error and poor self-synchronizing effect in case of failures occurring near a current zero-crossing point; without increasing the construction cost, the clock synchronization accuracy is improved to meet the requirements of the line longitudinal differential protection of the power distribution network.

The invention discloses a method for improving time accuracy of an electric energy information acquisition system. In the method, the time delay in four links, namely an astronomical time service module, a background server, a concentrator and metering terminal equipment, is calculated, predicted and compensated so as to improve the time accuracy of the electric energy information acquisition system. By calculating and predicting the time delay issued by time correction in the background server, the concentrator the terminal equipment and other links in the whole network of the electric energy information acquisition system and compensating the time delay, unified and accurate time marks are provided for each level of the electric energy information acquisition system, the data of the whole electric energy information acquisition system has an accurate time stamp, the time accuracy of the electric energy information acquisition system is improved, and the accurate time reference is provided for operation and scheduling, control, statistic analysis of line loss and other functions of a power system.

A decoder for generating an audio output signal having one or more audio output channels from a downmix signal is provided. The downmix signal encodes one or more audio object signals. The decoder has a control unit. Moreover, the decoder has a first analysis module for transforming the downmix signal to obtain a first transformed downmix having a plurality of first subband channels. Furthermore, the decoder has a second analysis module for generating, when an activation indication is set to the activation state, a second transformed downmix Moreover, the decoder has an un-mixing unit, wherein the un-mixing unit is configured to un-mix the second transformed downmix Furthermore, an encoder is provided.

An optical module conversion device based on modulator multichannel demultiplexing comprises a high-rate pulsed laser, a photon sampling gate, a multichannel demultiplexing module, a radio frequency frequency-synthesizing module, a parallelized photoelectric conversion module, a parallelized electrical sampling module and a data processing unit. The multi-channel demultiplexing is realized by using the optical switch effect of the modulator, and the high-speed optical sampling pulse is demultiplexed by the cascading modulator step by step. Finally, the parallelized photoelectric conversion, electrical sampling and data processing are utilized in a compound mode to realize the acquisition of the sampled signal. The device plays a critical role in improving the performance of microwave photon systems which require high sampling rate, high time precision and high sampling precision, wherein the microwave photonic systems comprise microwave photon radars, optical communication systems and the like.