Sensor Positioning for Twinned Wheels Signal Separation
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Solution Overview
Problem
In vehicles with twinned wheels, existing sensor systems face difficulties in differentiating and decoding signals from sensors due to their close proximity, leading to signal collisions and reception issues during both stationary and operational phases, especially in heavy trucks and buses.
Innovation Solution
Positioning sensors on wheels at an angular interval of at least 90 degrees coaxially on the same axle, utilizing a low-frequency link to vary signal power levels and prevent collisions, allowing for separate activation and decoding without modifying existing communication technologies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If sensors are positioned in twinned wheels with close proximity to facilitate wheel installation and valve alignment, then ease of manufacture and ease of operation are improved, but signal differentiation and decoding reliability deteriorate due to simultaneous activation and electromagnetic interference
Solution Approach 1:
The patent resolves the contradiction by transitioning from spatial separation (which would complicate installation) to temporal separation. Sensors are positioned at different angular intervals around the wheel circumference, creating time-based separation as wheels rotate. This allows sensors to be installed in aligned positions for ease of manufacture while their signals are differentiated temporally during operation, preventing simultaneous activation and signal collision.
Solution Approach 2:
The system dynamically separates sensor signals by exploiting the rotational motion of wheels. As wheels rotate, sensors pass by the receiver at different times based on their angular positions. This dynamic temporal separation allows stationary sensors to be installed in convenient positions while achieving signal differentiation during motion, resolving the contradiction between installation ease and signal reliability.
2Device complexity
If sensors are positioned close together in twinned wheels to simplify wheel assembly, then device complexity is reduced, but measurement precision deteriorates due to difficulty in differentiating and locating individual sensors
Solution Approach 1:
The patent adds a temporal dimension to sensor differentiation. Instead of requiring complex spatial separation or identification systems, sensors are positioned at different angular intervals so that their signals arrive at the receiver at different times during wheel rotation. This simple angular positioning provides precise sensor differentiation without increasing assembly complexity.
Solution Approach 2:
The patent uses visual reference marks (analogous to color changes) on wheels to indicate sensor angular positions. These marks help operators quickly and accurately locate sensors during installation and maintenance, achieving precise sensor differentiation without complex identification systems or increased device complexity.
3Ease of operation
If sensors are positioned with aligned valve holes in twinned wheels to facilitate inflating, then ease of operation is improved, but signal reception quality deteriorates due to electromagnetic radiation collision and receiver blindness
Solution Approach 1:
The system exploits dynamic conditions during vehicle operation to separate sensor signals. As wheels rotate during displacement, sensors at different angular positions pass by the receiver sequentially rather than simultaneously. This dynamic temporal separation ensures that even though valves remain aligned for ease of operation, sensor signals are received at different power levels and times, preventing electromagnetic collision and receiver blindness.
Solution Approach 2:
The patent utilizes the periodic rotation of wheels to create periodic signal transmission patterns. Sensors transmit signals periodically as they rotate past the receiver, with the period determined by their angular positions. This periodic action ensures that signals from twinned wheels are transmitted at different phases, preventing simultaneous reception and eliminating signal collision while maintaining aligned valve positions.
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 method enables effective separation and decoding of sensor signals, ensuring reliable data reception and easy sensor location, even during wheel twinning, without altering sensors or communication protocols, and provides a visual reference for operator guidance.
Implementation Method 1
the electromagnetic radiation emitted by the sensors and received by the receiving module is of the same power level which inhibits the capacity to receive the message
Data Source
AI summary
The invention relates to a method of positioning sensors on wheels (200 and 300) installed coaxial to the same end of one and the same axle of a vehicle (C) comprising a receiving module (100) associated with the body of the vehicle, noteworthy in that it consists in positioning the sensors (210 and 310) at an angular interval greater than or equal to ninety (90) degrees of a wheel (200) relative to the other (300) so that, when operating in displacement mode, the distance between the receiving module and the sensor varies according to the wheel rotation, and in using a link of low frequency (LF) type so that the creation of a distance between the points of emission makes it possible to vary the power of the signals received, thus rendering them distinct. The invention also relates to a device making it possible to implement the method described hereinabove. Applications: measurement and transmission of data associated with the wheels of a vehicle.