Wheel Module Data Multiplexing for Low-Energy TPMS Transmission
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current tire pressure monitoring systems face challenges in energy-efficiently transmitting a wide range of information, such as mileage, target pressure, and tread depth, due to limited data telegram length and battery power constraints.
Innovation Solution
The method employs a multiplexer process to alternate the transmission of quasi-static information in data telegrams, utilizing unused storage space and adjusting transmission frequencies and information types based on operating modes, allowing for longer cycles without increased energy consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If data telegrams are transmitted at regular intervals to provide additional information such as mileage, target pressure, and tread depth, then the quantity of information transmitted is improved, but the energy consumption increases
Solution Approach 1:
The data telegram is segmented into multiple sections, with each section carrying different types of information. Quasi-static information is separated into dedicated sections that can be selectively transmitted, allowing the system to provide comprehensive information while controlling energy consumption by transmitting only necessary segments at each interval.
Solution Approach 2:
The transmission of quasi-static information sections is implemented periodically rather than continuously. The system alternates between transmitting quasi-static information sections and measurement data sections in a periodic manner, reducing overall energy consumption while ensuring that additional information is provided at regular intervals.
2Loss of information
If the data telegram length is increased to include more information types, then the quantity of information is improved, but the transmission time and energy consumption increase
Solution Approach 1:
The data telegram is divided into multiple sections, each carrying specific types of information. This segmentation allows the system to transmit diverse information types without requiring each telegram to contain all possible data, thereby reducing individual transmission time while maintaining information diversity across multiple telegrams.
Solution Approach 2:
The data telegram structure is designed to be multi-functional, with sections that can carry different types of information (measurement data, quasi-static information, additional parameters) depending on the transmission cycle. This universality allows a single telegram format to serve multiple information transmission purposes without requiring separate dedicated telegrams for each data type.
3Loss of information
If quasi-static information sections are used to transmit additional information, then the information capacity is improved, but the complexity of data management increases
Solution Approach 1:
The data telegram is segmented into distinct sections, with quasi-static information placed in specific dedicated sections. This segmentation simplifies data management by providing clear boundaries and locations for different information types, making it easier to track, transmit, and process each section independently without increasing overall system complexity.
4Productivity
If transmission frequency is increased to provide more frequent updates, then the productivity of information transmission is improved, but the energy consumption increases
Solution Approach 1:
The system implements periodic transmission of different information types rather than continuous high-frequency transmission of all data. By alternating between transmitting quasi-static information sections and measurement data sections at regular intervals, the system maintains a high overall information transmission rate while reducing peak energy consumption through rhythmic, controlled transmission cycles.
Data Source
Figure 1
AI summary
Method for wirelessly transmitting information from a wheel module (4) arranged within a wheel (2) of a tire pressure monitoring system (3) of a vehicle (1) to a receiving unit (6), wherein the method comprises encoding the information in data telegrams, wherein each data telegram has a number of sections for quasi-static information and a plurality of data telegrams are transmitted during a period in which the wheel module (4) is continuously in one of several defined operating modes, wherein information transmitted in the sections for quasi-static information is exchanged by means of a multiplexing method.