Single Line Data Transmission with Master Request and Slave Priority
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Solution Overview
Problem
Existing single-line data transmission methods for equipment are complex and not adaptable to various scenarios, particularly in limited space environments like drilling equipment, where communication buses can only be a single line.
Innovation Solution
A data transmission method and equipment that employs a master node to request data from slave nodes through a bus in a preset cycle, with slave nodes autonomously uploading data in emergency situations and prioritizing data transmission based on bus potential and state, ensuring efficient single-line data transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single-line communication bus is used due to space limitation, then the device complexity is reduced, but the data transmission efficiency and adaptability deteriorate
Solution Approach 1:
The patent implements periodic data transmission cycles with two distinct phases: a first cycle where the master node actively requests data from slave nodes, and a second cycle where slave nodes autonomously upload data. This periodic switching between request-driven and autonomous transmission modes enables efficient data transfer over a single-line bus without requiring complex multi-line infrastructure.
2Device complexity
If a single-line communication bus is used due to space limitation, then the device complexity is reduced, but the adaptability to various scenes deteriorates
Solution Approach 1:
The patent introduces dynamic adaptability through two transmission modes: normal mode during the first cycle where the master node controls data requests based on current needs, and emergency mode during the second cycle where slave nodes autonomously upload data when detecting emergency situations. This dynamic switching enables the single-line bus to adapt to both routine operations and emergency scenarios, significantly enhancing versatility without increasing structural complexity.
3Reliability
If slave nodes autonomously upload data in emergency situations, then the reliability is improved, but the device complexity increases
Solution Approach 1:
The patent enables slave nodes to autonomously detect emergency situations and independently initiate data upload during the second cycle without requiring master node intervention. This self-service capability allows slave nodes to automatically prioritize and transmit critical emergency data, improving system reliability and response time while maintaining relatively simple control logic through predefined autonomous behavior patterns.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This method actively requests and prioritizes data transmission, enabling effective single-line data transfer in both normal and emergency conditions, enhancing adaptability and efficiency in constrained environments.
Implementation Method 1
detecting the electric potential condition of the bus through a data transmission detection circuit, whereat the preset electric potential is a first electric potential or a second electric potential
Data Source
AI summary
Disclosed is a data transmission method. The method includes: sending, instruction information of data transmission to a slave node in a preset first cycle; judging, by the slave node, whether data should be sent according to the instruction information of data transmission; sending the data to the a master node if the slave node judges that the data needs to be sent; and sending, by other slave nodes, the data sequentially to the master node according to a preset slave node priority, an electric potential condition and a data state of the other slave nodes in a preset second cycle. In a preset first cycle, data is actively requested from a slave node, and in a preset second cycle, other slave nodes can actively send the data to a master node according to a preset slave node priority, an electric potential condition and a data state of the other slave nodes.