Tire-side Road Surface State Determination Device
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Solution Overview
Problem
Existing road surface state determination devices face challenges in responsiveness due to increased transmission time, leading to delayed reporting of road conditions to drivers and reduced vehicle control effectiveness, and they also suffer from high power consumption, making battery replacement difficult.
Innovation Solution
A road surface state determination device that includes a tire-side device with a vibration detection unit, a control unit, and a data communication unit, which transmits partial road surface data during one tire rotation, allowing for reduced transmission time and lower power consumption by selecting and transmitting only the most relevant feature data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If all road surface data items are transmitted during one tire rotation, then complete road surface state information is provided, but transmission time increases and power consumption increases
Solution Approach 1:
The patent extracts and transmits only the most important road surface data items (such as maximum vibration acceleration, frequency, and phase) from the complete set of vibration data. This selective extraction approach provides sufficient information for road surface state determination while significantly reducing the amount of data transmitted, thereby decreasing transmission time and power consumption without substantial loss of diagnostic accuracy.
Solution Approach 2:
Instead of transmitting all available road surface data items, the system transmits a partial set of critical parameters. This partial action approach achieves the necessary diagnostic function with reduced data transmission, balancing information completeness against transmission efficiency and power consumption.
2Loss of information
If all road surface data items are transmitted during one tire rotation, then complete road surface state information is provided, but power consumption increases
Solution Approach 1:
The system extracts only the most critical road surface data items (maximum vibration acceleration, frequency, and phase information) from the complete vibration dataset. This selective extraction reduces the total data transmission volume, directly lowering power consumption while maintaining sufficient information for accurate road surface state determination.
Solution Approach 2:
The patent implements partial data transmission by sending only essential road surface parameters rather than complete vibration data. This approach reduces power consumption significantly while providing adequate information for road surface state assessment, achieving energy efficiency without substantial diagnostic capability loss.
3Speed
If data transmission is performed frequently, then real-time road surface state monitoring is achieved, but power consumption increases
Solution Approach 1:
By extracting and transmitting only critical road surface parameters (maximum vibration acceleration, frequency, and phase) rather than complete vibration waveforms, the system reduces data transmission volume. This enables more frequent transmissions at lower power costs, improving real-time monitoring capability while maintaining energy efficiency.
Solution Approach 2:
The system transmits a partial set of essential road surface data items at optimized intervals. This partial transmission approach allows for more frequent updates compared to transmitting complete data sets, thereby improving responsiveness and real-time monitoring while controlling power consumption through reduced data volumes.
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 solution enables faster determination of road surface states, improving responsiveness and vehicle control while reducing power consumption, thus enhancing battery life and ease of maintenance.
Implementation Method 1
an acceleration sensor attached to a back surface of a tread of a tire, detects vibration applied to the tire using the acceleration sensor
Data Source
AI summary
A road surface state determination device includes a tire-side device and a vehicle-body-side system. The tire-side device is attached to each of a plurality of tires included in a vehicle. The vehicle-body-side system is included in a body of the vehicle. The tire-side device may output a detection signal corresponding to a magnitude of vibration applied to the tire. The tire-side device may extract data items of a road surface state indicative of the vibration of the tire during one rotation of the tire from the detection signal. The tire-side device may generate road surface data. The tire-side device may transmit the road surface data. The vehicle-body-side system may receive the road surface data. The vehicle-body-side system may determine the road surface state based on the road surface data.