6 results about "Time standard" patented technology

The invention discloses a cross-chain meteorological and hydrological data consistency verification method oriented to multi-block-chain collaboration, which effectively solves the problem of data alignment caused by inconsistent time standards in a multi-chain environment by collecting multi-source data and generating a data tuple with a geographic identifier and distributing a unified reference timestamp for the data in combination with a physical clock synchronization mechanism. And furthermore, the time deviation is extracted through a layered verification structure and inter-chain cross check, and the timestamp weight is dynamically adjusted, so that the time synchronization precision of the cross-chain data is improved. Finally, a standardized time sequence is generated through segmented aggregation of the data, cross-chain storage is completed, regular backtracking verification is performed in combination with a supervision chain, time consistency and content credibility of the meteorological and hydrological data in the cross-chain circulation process are guaranteed, and efficient collaboration and traceability between heterogeneous block chain systems are achieved.

This application discloses a method for refining the time standard of a satellite-ground atomic clock, including the following steps: S1. Receiving satellite signals through each receiver; S2. Each receiver records its own reception time upon receiving the satellite signal and calculates the satellite signal propagation time; S3. Obtaining satellite-based augmented corrections for the satellite signal; S4. Collecting and processing ground-based observation data from each ground reference station; S5. Calculating ground-based corrections based on the ground-based observation data; S6. Fusing the satellite-based and ground-based corrections to obtain a fused correction; S7. Based on the fused correction, correcting the propagation time of the satellite signal received by the receivers of each ground reference station to obtain the distance between the satellite and the receivers of each ground reference station; S8. Using signals from at least four satellites, calculating the clock bias based on the distance and the least squares method; S9. Correcting the receiver clock using the clock bias. This application improves the accuracy and robustness of time correction.

The utility model relates to driving plate type safety inspection equipment, which comprises a dial plate and a pointer, a pointer is arranged on the front surface of the dial plate, the first end of the pointer is rotationally connected with the center of the dial plate, and the other end of the pointer points to the patrol time period marking devices; according to the utility model, patrolling and patrolling time standard recording can be realized visually.

This application provides a method, apparatus, receiver, and storage medium for synchronizing the incoming reference time standard of an RDSS receiver. The method includes: determining the timing interrupt time difference by acquiring tracking channel observation data and correcting the alignment of the timing interrupt trigger time with the outgoing reference time standard; simultaneously acquiring the outgoing frame number from the satellite broadcast and maintaining the outgoing frame time count and the incoming reference time standard during each timing interrupt; ensuring that the incoming response time can be accurately determined and controlling the transmission module to send the incoming signal on time; and solving the technical problems of inaccurate incoming response transmission timing caused by difficulty in aligning the timing interrupt with the outgoing reference time standard and easy drift in intra-frame time maintenance in existing counting methods.

This invention discloses a method and system for determining the current time using radio observations of multiple pulsars, comprising the following steps: S1. Correcting the deviation between the local clock time and the absolute time to within a set threshold; S2. Selecting N radio pulsars, where N is greater than or equal to 4, and continuously observing the selected radio pulsars using a radio telescope to obtain observation data; S3. Processing the observation data to generate the observed pulse profile; calculating the pulsar pulse phase φ. i S4. Calculate the standard pulse profile P k With the observed pulse profile P' k The relative phase deviation δφ between i Calculate the relative phase deviation δφ with error S5. i With phase φ i deviation Δφ i S6. The deviation δT between the telescope's local clock time and absolute time is calculated, thereby determining the absolute time. This invention eliminates the need to synchronize the local clock with the absolute time of a certain time standard. It can obtain absolute time with an accuracy on the order of tens of microseconds by analyzing observed pulsars, and significantly reduces calculation time.

The utility model discloses time interval measuring equipment based on a high-speed video collector, and belongs to the technical field of time interval measurement and metering traceability. In order to solve the technical problems of high measurement uncertainty and incapability of accurately tracing due to difficulty in synchronous triggering of visual triggering type timing equipment, the utility model comprises at least two independently adjustable lenses and light paths, the light guide system is used for receiving and deflecting light of each light path; and a high-speed photosensitive device. The key point is that the light guide system converges light from different lenses and images the light on different areas of the single high-speed photosensitive device respectively. Visual information of a time standard source and a detected object can be synchronously recorded at a high speed through the photosensitive device, and an accurate time interval is calculated by analyzing a video key frame and combining with a known frame rate. According to the utility model, the synchronization error is effectively eliminated, the uncertainty is reduced to millisecond level, the high-precision measurement and traceability of visual trigger equipment are realized, the structure is compact, and the adjustment is convenient.