| 韦子辉,冯款培,赵新月,王阳,孔祥杰.UWB有线时钟同步定位方法研究[J].电子测量与仪器学报,2025,39(12):217-228 |
| UWB有线时钟同步定位方法研究 |
| Research on positioning method of UWB wired clock synchronization |
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| DOI： |
| 中文关键词: 有线时钟同步 超宽带TDOA定位 时钟同步校准 |
| 英文关键词:wired clock synchronization UWB-based TDOA localization clock synchronization calibration |
| 基金项目:河北省中央引导地方科技发展资金项目（自由探索类基础研究）（246Z0402G）资助 |
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| Author | Institution |
| Wei Zihui | 1.College of Quality and Technical Supervision, Hebei University, Baoding 071002, China; 2.National&Local Joint Engineering
Research Center of Metrology Instrument and System, Baoding 071002, China; 3.Hebei Key Laboratory of Energy Metering and
Safety Testing Technology, Baoding 071002, China; 4.Engineering Research Center of Zero-carbon Energy Buildings and
Measurement Techniques, Ministry of Education, Baoding 071000, China |
| Feng Kuanpei | 1.College of Quality and Technical Supervision, Hebei University, Baoding 071002, China; 2.National&Local Joint Engineering
Research Center of Metrology Instrument and System, Baoding 071002, China; 3.Hebei Key Laboratory of Energy Metering and
Safety Testing Technology, Baoding 071002, China; 4.Engineering Research Center of Zero-carbon Energy Buildings and
Measurement Techniques, Ministry of Education, Baoding 071000, China |
| Zhao Xinyue | 1.College of Quality and Technical Supervision, Hebei University, Baoding 071002, China; 2.National&Local Joint Engineering
Research Center of Metrology Instrument and System, Baoding 071002, China; 3.Hebei Key Laboratory of Energy Metering and
Safety Testing Technology, Baoding 071002, China; 4.Engineering Research Center of Zero-carbon Energy Buildings and
Measurement Techniques, Ministry of Education, Baoding 071000, China |
| Wang Yang | 1.College of Quality and Technical Supervision, Hebei University, Baoding 071002, China; 2.National&Local Joint Engineering
Research Center of Metrology Instrument and System, Baoding 071002, China; 3.Hebei Key Laboratory of Energy Metering and
Safety Testing Technology, Baoding 071002, China; 4.Engineering Research Center of Zero-carbon Energy Buildings and
Measurement Techniques, Ministry of Education, Baoding 071000, China |
| Kong Xiangjie | 1.College of Quality and Technical Supervision, Hebei University, Baoding 071002, China; 2.National&Local Joint Engineering
Research Center of Metrology Instrument and System, Baoding 071002, China; 3.Hebei Key Laboratory of Energy Metering and
Safety Testing Technology, Baoding 071002, China; 4.Engineering Research Center of Zero-carbon Energy Buildings and
Measurement Techniques, Ministry of Education, Baoding 071000, China |
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| 中文摘要: |
| 时钟同步是保证 TDOA定位精度的关键，目前TDOA定位系统多采用无线时钟同步方式，需要主从基站间频繁的对时通信，存在易受干扰，占用信道，影响标签容量等问题，为此提出了一种基于 UWB 有线时钟同步的 TDOA定位系统设计方案。设计了时钟与同步信号差分远传电路，采用D触发器、或非门设计同步号的调制与解调电路，保证了时钟与同步信号的相位一致性，并设计了时钟同步校准方法补偿系统误差。经测试同步精度达到 0.5 ns,选用的标准超5类网线最长有效距离可达100 m，优于传统无线时钟同步精度，并构建了主基站-次级主基站-从基站的多层级联时钟同步架构，实现系统的高可扩展性。在室内环境下进行TDOA 定位实验验证,实验结果表明，解算得到的标签定位精度 R95 平均值可达 9.75 cm 左右，该系统提升了超宽带 TDOA 定位的精确度和稳定性,减少了超宽带 TDOA 定位的无线信道占用。 |
| 英文摘要: |
| Clock synchronization is the key to ensuring the accuracy of time difference of arrival (TDOA) positioning systems. Currently, most TDOA systems adopt wireless clock synchronization methods, which necessitate frequent timing exchanges between master and slave base stations. Such wireless synchronization scheme suffers from susceptibility to interference, channel occupation issues, limited tag capacity and so on. Accordingly, a design for a TDOA positioning system utilizing UWB-based wired clock synchronization is proposed. This system has designed a differential remote transmission circuit for clock signal and synchronization signal. Particularly, the circuit for modulation and demodulation of the synchronous signal employs D flip-flop and NOR gate to ensure the phase alignment between the clock signal and the synchronization signal. Moreover, a clock synchronization calibration method designed to compensate for system errors, which confirms a synchronization accuracy of 0.5 ns with a maximum operational range of 100 m via standard Category 5e cables, superior to conventional wireless clock synchronization methods. In addition, a multi-tier cascaded clock synchronization architecture (Master→Submaster→Slave) was implemented to achieve high system scalability. Experimental verification in indoor environments demonstrates that the tag positioning derived from this TDOA positioning implementation yields an average R95 accuracy of approximately 9.75 cm. To sum up, the developed system enhances both precision and stability in UWB-based TDOA localization and reduce wireless channel occupancy of ultra-wideband TDOA positioning. |
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