Tire Pressure Sensor Position Auto-Assignment via Phase Angle
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Solution Overview
Problem
Existing tire pressure detecting systems face challenges in identifying and assigning the position of tire pressure detecting sensors during installation, replacement, or position change, leading to difficulties in determining which sensor is transmitting pressure and temperature information wirelessly.
Innovation Solution
A tire pressure detecting module that includes a phase angle sensor, a pressure/temperature detecting sensor, and a control unit, which selects a transmission pattern based on the phase angle of the wheel to calculate a standby time until the phase angle matches, allowing for automatic assignment of the sensor position by transmitting tire information along with the selected pattern and standby time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If tire pressure detecting sensors are installed on wheels and transmit pressure/temperature information wirelessly, then real-time tire pressure monitoring is achieved, but it becomes difficult to identify which sensor transmits information during installation, replacement, or position change
Solution Approach 1:
The patent uses transmission patterns with different phase angle number arrangements to create distinguishable signal characteristics for each sensor position, analogous to using different colors to identify objects. Each sensor position is assigned a unique transmission pattern that can be recognized by the receiving device, enabling easy identification of sensor locations during installation or replacement while maintaining reliable monitoring.
2Reliability
If multiple sensors transmit information simultaneously, then comprehensive tire monitoring is achieved, but signal collisions occur making position identification difficult
Solution Approach 1:
The patent implements periodic transmission where sensors transmit information at different time intervals based on their assigned phase angle numbers. Instead of simultaneous transmission, each sensor transmits in a predetermined sequence, eliminating signal collisions while maintaining comprehensive monitoring coverage. The periodic action ensures that transmission data from multiple sensors does not overlap.
Solution Approach 2:
The patent assigns unique transmission patterns and phase angle numbers to each sensor position before transmission begins. This preliminary assignment of identification information allows the receiving device to distinguish and correctly identify each sensor's position based on the transmission pattern received, preventing information loss due to signal collision.
3Extent of automation
If transmission patterns with phase angle numbers are used to identify sensor positions, then automatic assignment is enabled, but calculation of standby time is required
Solution Approach 1:
The patent enables the system to automatically determine sensor positions through self-service mechanisms. The receiving device automatically calculates standby time based on the phase angle numbers and transmission patterns received from sensors, without requiring manual intervention or complex external calibration equipment. The system self-identifies and assigns sensor positions autonomously.
Solution Approach 2:
The patent uses feedback from the transmitted phase angle numbers and transmission patterns to automatically adjust and determine sensor positions. The receiving device receives transmission information, calculates the corresponding standby time based on the phase angle data, and uses this feedback to automatically assign positions, simplifying the overall system complexity despite the calculation requirement.
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 selecting one transmission pattern of a plurality of transmission patterns, in which phase angle numbers are arranged, to calculate a standby time taken until a phase angle number of the selected transmission pattern and the detected phase angle of the wheel match each other, and a pressure detecting transmission part transmitting tire information including the pressure or temperature detected according to the selected transmission pattern, transmission pattern information that is information with respect to the selected transmission pattern, and the standby time.