Tire Condition Transmitter Angle Data Reduction
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Solution Overview
Problem
Tire condition monitoring systems face increased power consumption due to the need to transmit data indicating specific angles, which lengthens the data transmission and consumes more electric power.
Innovation Solution
The system employs transmitters that store a correspondence relationship between specific bits of the transmission data and specific angles, allowing the transmission of data without angle information, enabling the receiver to identify the wheel assembly based on this relationship, thus reducing data length and power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If transmission data includes data indicating angle information, then the receiver can identify the wheel assembly position, but the data length becomes long, increasing power consumption
Solution Approach 1:
The patent extracts only the necessary angle information from the transmission data by using a specific bit that changes with wheel rotation. Instead of transmitting complete angle data, only a single bit indicating whether the wheel has passed a reference point is transmitted, which is sufficient for position identification. This extraction principle reduces data length while maintaining the ability to identify wheel assembly position.
Solution Approach 2:
Instead of having the transmitter send angle information and the receiver interpret it, the system inverts the approach by having the receiver determine position based on the timing and pattern of received signals. The receiver uses the specific bit in combination with its own rotation angle detection to identify which wheel assembly transmitted the data, eliminating the need for explicit angle data transmission.
2Reliability
If transmission data is transmitted at multiple specific angles, then the receiver can reliably receive data avoiding null points, but the data length increases when angle information is included
Solution Approach 1:
The patent extracts minimal angle-related information (a single specific bit) from the transmission data. This bit indicates whether the wheel rotation angle has reached a predetermined value, allowing the receiver to identify the transmitting wheel assembly without transmitting complete angle information. This extraction maintains reliability while minimizing data length and power consumption.
3Use of energy by moving object
If the data length of transmission data is reduced by not including angle information, then power consumption decreases, but the receiver needs alternative methods to identify wheel assembly position
Solution Approach 1:
The system uses the receiver's own rotation angle detecting device to provide the reference information needed for position identification. Instead of relying on angle data from the transmitter, the receiver independently detects wheel rotation angles and combines this with the specific bit from the transmitter to identify which wheel assembly transmitted the data. This self-service approach eliminates the need for complex angle encoding in the transmission data.
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 approach reduces power consumption by shortening the data transmission length, allowing the system to operate more efficiently without the need for angle information in the transmitted data.
Implementation Method 1
The transmitting section is configured to modulate the transmission data, which is generated by the data generating section, and transmit the modulated data
Data Source
AI summary
A transmitter includes a power source of the transmitter, a condition detecting section that detects a condition of a tire, a data generating section that generates transmission data that contains tire condition data indicating the condition of the tire detected by the condition detecting section, a transmitting section that modulates the transmission data and transmits the modulated data, a storage section storing a correspondence relationship in which values of a specific bit among bits of the transmission data that change as the wheel assembly rotates are respectively assigned to specific angles set for the rotation angle of the wheel assembly, and a transmission control section that transmits the transmission data from the transmitting section when detecting that the rotation angle of the wheel assembly is any of the specific angles.