Tire Pressure Sensor Phase Angle Positioning
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Solution Overview
Problem
Existing tire pressure detecting systems face challenges in identifying and automatically assigning the position of tire pressure detecting sensors during installation, replacement, or position changes, making it difficult to determine which sensor is transmitting pressure and temperature information wirelessly.
Innovation Solution
A tire pressure detecting module that includes a phase angle sensor to detect the phase angle of a wheel, a pressure detecting sensor to measure tire pressure and temperature, and a control unit that extracts a phase angle number to calculate a retransmission interval for wirelessly transmitting tire information, allowing the control unit to automatically assign the position of the sensor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a tire pressure detecting sensor is installed on a wheel to measure and wirelessly transmit pressure and temperature information, then tire pressure monitoring capability is improved, but the ability to identify which sensor transmits information during installation or position change deteriorates
Solution Approach 1:
The system performs preliminary action by detecting the phase angle of the wheel before the sensor transmits pressure and temperature information. The control unit calculates a retransmission interval based on this phase angle, enabling the system to identify which sensor is transmitting information before the actual measurement data is sent. This preliminary detection of wheel position resolves the identification problem during installation or position change.
2Ease of operation
If the sensor transmits tire information wirelessly, then ease of installation is improved, but the complexity of identifying sensor position and matching it with wheel position worsens
Solution Approach 1:
The phase angle serves as an intermediary element that connects the sensor position to the wheel position. Instead of directly identifying sensor position through complex tracking, the system uses the easily measurable phase angle of the wheel as a mediator. The control unit calculates the retransmission interval based on this phase angle, creating a simple mapping relationship that resolves the complexity of position identification while maintaining wireless transmission convenience.
3Adaptability or versatility
If the system uses multiple sensors on different wheels, then monitoring coverage is improved, but the difficulty of matching each sensor with its corresponding wheel position increases
Solution Approach 1:
The system applies segmentation by dividing the wheel rotation into discrete phase angle segments. Each wheel's phase angle is detected and segmented into specific intervals, which are then used to calculate unique retransmission intervals for each sensor. This segmentation approach allows the system to handle multiple sensors on different wheels independently, matching each sensor to its corresponding wheel position through distinct phase angle calculations without increasing overall system complexity.
Data Source
AI summary
Provided are a tire pressure detecting module that simply identifies a position of a tire detecting module to automatically assign the position of the tire detecting module and a tire pressure detecting system including the same. The tire pressure detecting module includes a phase angle sensor detecting a phase angle of a wheel, a pressure detecting sensor detecting a pressure and temperature of a tire, a pressure detecting control unit extracting a phase angle number matching a phase angle of the wheel that is detected by the phase angle sensor among a plurality of phase angle numbers that are given by uniformly dividing the wheel, and a pressure detecting transmission part transmitting tire information including a pressure value or temperature value detected by the pressure detecting sensor at the retransmission interval several times.