BLE Wheel Sensor Motion Detection for Simpler TPMS
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing tire pressure monitoring systems (TPMS) are complex, heavy, and costly due to the addition of accelerometers, impact sensors, or magnetic field sensors to detect vehicle movement, which increases energy consumption and reduces battery life.
Innovation Solution
A method that uses a sensor to detect rotational movement of a vehicle wheel by adapting the periodicity of radiofrequency signals transmitted via Bluetooth Low Energy communication, reducing the need for additional sensors and simplifying the wheel unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an accelerometer, impact sensor, or magnetic field sensor is added to detect vehicle movement, then vehicle running detection capability is improved, but device complexity, weight, and cost increase
Solution Approach 1:
The existing radiofrequency transceiver is made to serve dual purposes: its primary function of transmitting pressure data is enhanced with a secondary function of detecting vehicle movement by analyzing response signal characteristics. This eliminates the need for dedicated motion detection sensors and reduces overall system complexity.
Solution Approach 2:
The system uses its own radiofrequency communication infrastructure to perform motion detection without requiring external or additional sensors. The transceiver analyzes the characteristics of response signals it receives to determine vehicle movement status, making the system self-sufficient.
2Reliability
If an accelerometer, impact sensor, or magnetic field sensor is added to detect vehicle movement, then vehicle running detection capability is improved, but weight increases
Solution Approach 1:
The radiofrequency transceiver performs both data transmission and motion detection functions, eliminating the need for additional physical sensors that would increase the weight of the wheel unit.
3Reliability
If an accelerometer, impact sensor, or magnetic field sensor is added to detect vehicle movement, then vehicle running detection capability is improved, but cost increases
Solution Approach 1:
The existing transceiver component is enhanced to perform motion detection through signal analysis, avoiding the need to manage multiple sensor types and their associated product references.
Solution Approach 2:
The motion detection function is merged with the existing radiofrequency communication function, combining multiple capabilities into a single integrated system rather than separate components.
4Reliability
If additional sensors are added to detect vehicle movement, then vehicle running detection capability is improved, but energy consumption increases
Solution Approach 1:
The system uses the existing radiofrequency communication signals for dual purposes, analyzing response signal characteristics to detect motion without requiring additional power-consuming sensors.
Solution Approach 2:
The transceiver performs both communication and motion detection using the same hardware and signal infrastructure, eliminating the need for separate power-consuming motion sensing components.
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 the complexity and weight of TPMS, decreases energy consumption, and extends battery life while maintaining effective vehicle movement detection.
Implementation Method 1
The sensor has a first radiofrequency transceiver (122) intended to communicate with a second radiofrequency transceiver (162) provided on an electronic computer (102) by means of a Bluetooth Low Energy communication link
Implementation Method 2
the detection step comprises a step of detecting the rotational movement of the body by the sensor by means of the response signals transmitted by the electronic computer
Data Source
AI summary
A method for detecting a rotational movement of a body about an axis of rotation with respect to a fixed structure. The body including a sensor to carry out measurements on the body and having a first radiofrequency transceiver to communicate with a second radiofrequency transceiver provided on an electronic computer mounted on the fixed structure by a Bluetooth® Low Energy communication link to transmit the measurements to the electronic computer. The sensor being able to transmit radiofrequency signals and the electronic computer being capable of confirming receipt of the radiofrequency signals by transmitting a response signal to the sensor. The method includes detecting the rotational movement of the body by the sensor by the response signals transmitted by the electronic computer and adapting the periodicity of the radiofrequency signals transmitted by the sensor as a function of the rotation or non-rotation of the body.