Wireless Tire Sensor Inside Cavity for Rim Protection
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Solution Overview
Problem
Existing tire pressure and temperature monitoring systems for off-the-road vehicles are heavy, damage tire rims, require costly retrofitting, and are not easily transferable, leading to premature tire failure and inefficiencies in maintenance.
Innovation Solution
A wireless tire pressure and temperature measurement system with a sensing device housed in a protective vessel that is dropped inside the tire, using sensors and a telemetry transmitter, allowing for accurate measurements without attachment to the tire rim or valve stem, and enabling remote data transmission and alert signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If fixed attachment of sensors to tire rim is used, then measurement reliability is improved, but device weight increases and rim strength decreases
Solution Approach 1:
The sensing device is extracted from the traditional fixed attachment method and placed inside the tire cavity. This removes the need for external mounting hardware on the rim, reducing overall system weight while maintaining measurement reliability through internal positioning against the tire liner.
Solution Approach 2:
The tire liner serves as an intermediary surface for sensor attachment. Instead of fixing sensors directly to the metal rim, the liner provides a compliant mounting surface that distributes attachment forces, preserving rim strength while enabling reliable sensor positioning.
2Ease of operation
If sensor attachment to valve stem is used, then installation simplicity is improved, but valve stem functionality is encumbered
Solution Approach 1:
The sensing function is extracted from the valve stem assembly and placed inside the tire cavity. This separates the measurement function from the valve stem, allowing the valve to maintain its original simplicity and functionality while the sensor operates independently inside the tire.
3Stability of the object's composition
If fixed attachment to rim is used, then measurement stability is improved, but rim strength is weakened
Solution Approach 1:
The sensor attachment is extracted from the rim structure and relocated to the tire liner. This eliminates drilling or fastening operations on the rim, preserving its structural integrity while achieving measurement stability through the liner's compliant mounting surface.
Solution Approach 2:
The tire liner acts as a flexible mounting surface for the sensor. This thin film approach provides stable sensor positioning without requiring rigid attachment to the rim, thereby maintaining rim strength while achieving measurement stability through the flexible liner's ability to hold the sensor in place.
4Object-affected harmful factors
If protective vessel with sensors is placed inside tire, then tire damage is prevented, but measurement accessibility is reduced
Solution Approach 1:
The tire liner serves as an intermediary medium that transmits pressure and temperature information to the sensor. The liner's proximity to the tire's air chamber and tread allows the internal sensor to accurately measure tire conditions without direct contact, preventing damage while maintaining measurement accessibility.
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
The system provides accurate, non-invasive tire pressure and temperature monitoring, reducing maintenance time and costs, and allowing easy transfer between vehicles, while preventing tire damage and maintaining operational efficiency.
Implementation Method 1
The protective vessel can be made of mesh structured material to allow cushioning and force/acceleration dumping to the sensors housed inside
Implementation Method 2
The protective vessel can be made of mesh structured material to allow cushioning and force/acceleration dumping to the sensors housed inside
Implementation Method 3
The protective vessel can be made of mesh structured material to allow cushioning and force/acceleration dumping to the sensors housed inside while allowing full exposure of the device within to the tire's air chamber atmosphere
Implementation Method 4
the protective vessel can employ an outer abrasion protective flexible elastic skin (or employ an additional outer abrasion protective flexible elastic skin) for use in circumstances where the vehicle's tire/rim has rough inner surfaces
Data Source
AI summary
A system and method for measuring, recording and reporting vehicle tire temperatures and/or pressures. In one aspect, a sensing device including a convex protective vessel, with pressure and/or temperature sensors enclosed therein. The sensing device is dropped freely within the interior of a tire prior to rim mounting. A movement sensor can also be included in the sensing device. The protective vessel, including all sensors, is not attached or connected in any way to the vehicle tire, rim, or valve stem such that the sensing device is independent of the vehicle tire, rim, and valve stem, and moves freely within the interior of the tire. A balancing set including a dummy device, substantially equal in weight to a sensing device, and means for connecting the dummy device to the sensing device at 180 degrees separation around the tire may also be employed.