70results about How to "Eliminate time errors" patented technology

Provided are an electronic device with a clock correction function and a clock correction method thereof. The clock in the electronic device comprises a clock generating unit, a clock correction unit and a clock display unit. The clock generating unit generates current time information. The clock correction unit receives a sound signal from a broadcast station and broadcasted by a radio, identifies a whole point timekeeping of the broadcast station according to the frequency of the sound signal, and compares the whole point of time corresponding to the whole point timekeeping with the time information generated by the clock generating unit. If the result of the comparison is inconsistent, the time information generated by the clock generating unit is corrected to the whole point of time broadcast by the broadcast station. The clock display unit displays the time information generated by the clock generating unit. The invention further provides a clock correction method. According to the invention, a time error caused by an accumulation of errors of clock elements in the clock is eliminated.

The present invention relates to a system and a method for synchronizing a video signal and a wireless sensor signal. One embodiment of the present invention provides a system for synchronizing a video signal and a wireless sensor signal, the system comprising: a camera device which is provided with a first synchronization clock, generates a video signal by photographing an object, and transmits, to a computing device side, the video signal into which a first time tag is inserted by the first synchronization clock at every first unit time; a wireless sensor which is provided with a second synchronization clock and a wireless communication module, generates a sensor signal by sensing a changing state value from the object or from outside, and transmits, to a sensor signal collecting unit side via the wireless communication module, the video signal into which a second time tag is inserted by the second synchronization clock at every second unit time; a zero-point setting device for transmitting a zero-point setting signal containing reference time information to the camera device side and the wireless sensor side over a wired network; a sensor signal collecting unit which collects a sensor signal that is wirelessly transmitted from the wireless sensor and transmits the sensor signal to the computing device side; and a computing device which receives the video signal and the sensor signal and performs synchronization between the video signal and the sensor signal, wherein a local time of the first synchronization clock and the second synchronization clock is changed to the reference time according to the zero-setting signal, and the computing device performs synchronization of the video signal and the sensor signal on the basis of time information contained in the first time tag and the second time tag.

The invention provides a switching equipment clock synchronization device and a method thereof based on an AS6802 standard. The device comprises a receiving first-in first-out queue FIFO module, a frame parsing module, a receiving listening module, a curing module, a compression module, a group detecting module, a clock module and a frame synthesis module. The method comprises the steps of: caching data, listening the arrival time and parsing a frame, obtaining a curing time, obtaining a compression time, detecting unity, calibrating the clock, and performing frame synthesis. The invention solves the problem that the switching equipment frequently loses synchronization in the case of some switching equipment with large clock deviations in the Ethernet so as to improve the stability of theclock synchronization of the switching equipment, and simultaneously solves the problem of spurious synchronization of the switching equipment in the case of receiving the information that the times of the switching equipment are not synchronized in the Ethernet so as to improve the reliability of the clock synchronization of the switching equipment.