End-to-end transmission delay measurement method and system for low-voltage power distribution network
A low-voltage distribution network and transmission delay technology, applied in distribution line transmission systems, transmission systems, wired transmission systems, etc., can solve the problems of measurement failure, inappropriate transmission delay measurement, impedance discontinuity, etc. Improved stability, good anti-interference, guaranteed effectiveness and accuracy
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Example Embodiment
[0046] Example 1
[0047] Such as Figure 2-Figure 3 As shown, the process of the proposed delay measurement system is described as follows:
[0048] ① The upper layer sends a time delay measurement command containing the measured node ID (set as B) to node A through the power line communication module;
[0049] ②The microprocessor of node A sends the time delay measurement command to node B through the power line communication module;
[0050] ③The microprocessor of node B replies to node A through the power line communication module with a measurement confirmation command;
[0051] ④The microprocessor of node A sends the time delay measurement start command to its programmable device;
[0052] ⑤The programmable device of node A generates a measurement signal, sends it to its radio frequency transmitter module, and records the current time t when all the measurement signals are sent. 1 ;
[0053] ⑥The measurement signal sent by node A reaches the radio frequency receiving module of node ...
Example Embodiment
[0062] Example 2
[0063] Adopt BPSK modulation method, carrier frequency is 4MHz, m1 and m2 sequence select 15-bit m code, where m1=[1,-1,-1,1,1,-1,1,-1,1,1,1,1 ,-1,-1,-1],
[0064] m2=[1,1,1,1,-1,1,-1,1,1,-1,-1,1,-1,-1,-1]. FPGA adopts EP4CE15, MCU adopts STM32F407, and power line carrier communication module adopts Shenzhen Guodian TXHX13-GD31001 module. The sampling rate frequency of FPGA to spread spectrum signal is 100MHz. The output results of correlation peaks under different noise interference are given. Figure 4 Is the correlation peak without noise and interference, Figure 5 Is the correlation peak when only white noise interference (SNR=-5dB) exists, Image 6 Is the correlation peak when there is only one multipath interference (SIR=5dB), Figure 7 It is the correlation peak when only 4MHz single frequency interference (SIR=0dB) exists.
[0065] Such as Figure 4-7 As shown, since the correlation calculation formulas (2)-(6) are directly performed on the BPSK modulat...
PUM
Abstract
Description
Claims
Application Information
- R&D Engineer
- R&D Manager
- IP Professional
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.
© 2023 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap