Spare Wheel TPMS Feedback Control for Low-Power Data Reception
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Solution Overview
Problem
Existing tire pressure monitoring systems (TPMS) face challenges in reducing current consumption while ensuring reliable data reception, particularly for spare wheels, due to the need for frequent data transmission and uncertainty about data receipt by the receiver.
Innovation Solution
A TPMS configuration with a transceiver on the spare wheel and a receiver on the vehicle body, utilizing a sensing unit with pressure and acceleration sensors, a control unit for data processing, and a transceiver for intermittent frame transmission, allowing bidirectional communication to confirm data receipt and reduce power consumption by entering a sleep state after successful transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If frame transmission is performed frequently to ensure reliable data reception, then data reception reliability is improved, but current consumption increases
Solution Approach 1:
The transceiver performs frame transmission at predetermined intermittent transmission cycles rather than continuously, reducing power consumption while maintaining reliable data reception. The system transitions between active transmission states and sleep states periodically.
Solution Approach 2:
The receiver sends response signals back to the transceiver to confirm frame receipt. Based on this feedback, the transceiver can determine whether retransmission is necessary, avoiding unnecessary transmissions and reducing current consumption while ensuring reliable data delivery.
2Reliability
If the transceiver remains in active state to ensure data transmission, then data transmission reliability is improved, but battery life decreases
Solution Approach 1:
The transceiver alternates between active transmission periods and sleep periods, extending battery life by minimizing the duration of high-power operations while maintaining data transmission reliability through periodic communication attempts.
Solution Approach 2:
The transceiver autonomously manages its power state based on feedback from the receiver. When a response signal is received confirming successful transmission, the transceiver automatically enters sleep mode, eliminating the need for continuous monitoring and extending battery life.
3Use of energy by moving object
If frame transmission is performed in intermittent drive cycle, then current consumption is reduced, but data reception reliability may deteriorate
Solution Approach 1:
The receiver provides feedback through response signals that confirm whether frames were successfully received during intermittent transmission cycles. This feedback mechanism ensures data reception reliability is maintained even when transmissions occur periodically rather than continuously.
Solution Approach 2:
The system is designed with predetermined transmission cycles that are optimized to ensure reliable data reception while minimizing power consumption. The transmission timing and frequency are pre-planned to balance reliability requirements with energy conservation.
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 configuration enables reliable data reception at the receiver while minimizing power consumption by confirming frame receipt and reducing unnecessary retransmissions, thus extending battery life and improving system efficiency.
Implementation Method 1
a pressure sensor configured to output a detection signal indicating a tire pressure of the spare wheel
Implementation Method 2
an acceleration sensor configured to output a detection signal according to the acceleration generated in the spare wheel
Implementation Method 3
a first transceiver configured to transmit the frame
Implementation Method 4
a second transceiver configured to receive a frame and transmit a response signal indicating that the frame is received
Data Source
AI summary
A transceiver of a spare wheel includes a sensing unit having a pressure sensor and an acceleration sensor configured to output a detection signal according to a tire pressure of the spare wheel and an acceleration generated in the spare wheel, a first control unit configured to create a frame that processes the detection signal indicating the tire pressure and stores it as data related to the tire pressure, and a first transmitter receiver configured to transmit the frame. A receiver includes a second transceiver configured to receive a frame and transmit a response signal indicating that the frame is received and a second control unit configured to detect the tire pressure and transmit a response signal from the second transceiver when the frame is received.