Research and Design of NTP-Based Time Synchronization System for Parking Lot

YUAN Xiaodi; SONG Wenxia; ZHANG Yue

doi:10.12338/j.issn.2096-9015.2020.9057

Volume 65 Issue 5

Jun. 2021

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YUAN Xiaodi, SONG Wenxia, ZHANG Yue. Research and Design of NTP-Based Time Synchronization System for Parking Lot[J]. Metrology Science and Technology, 2021, 65(5): 96-100. doi: 10.12338/j.issn.2096-9015.2020.9057

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YUAN Xiaodi, SONG Wenxia, ZHANG Yue. Research and Design of NTP-Based Time Synchronization System for Parking Lot[J]. Metrology Science and Technology, 2021, 65(5): 96-100. doi: 10.12338/j.issn.2096-9015.2020.9057

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Research and Design of NTP-Based Time Synchronization System for Parking Lot

doi: 10.12338/j.issn.2096-9015.2020.9057

1.
National Institute of Metrology, Beijing 100029, China
2.
Beijing Information Science & Technology University, Beijing 100101, China

Available Online: 2021-04-28
Publish Date: 2021-06-24

Abstract

Abstract

To solve problems of time synchronization and monitoring of parking lot, an NTP-based time synchronization system for the parking lot was designed to synchronize and trace the time of the parking lot to UTC (NIM), and the filtering algorithm of NTP was optimized to reduce the impact caused by network link asymmetry, and the average time deviation after synchronization is reduced by 2.62 ms. The system runs on μC/OS real-time operating system, adopts NTP to synchronize time to time standard in near real-time through 4G wireless transmission, then transmits the synchronized time to the parking lot timing and charging system through bus or Ethernet, and uploads the time deviation to the monitoring platform at the same time, which effectively solves the time synchronization problem of parking lot timing and charging system.
- time synchronization,
- traceability,
- NTP,
- filtering,
- monitor,
- 4G

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References(12)

References

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