Tire Sensor Antenna Isolation for Signal Integrity
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Solution Overview
Problem
Conventional tire temperature and pressure wireless sensing devices face issues with signal attenuation due to metal connection terminal contact problems, oxidation, and inconvenient battery replacement, leading to inaccurate and delayed detection.
Innovation Solution
A tire temperature and pressure wireless sensing device design featuring a housing with a valve body, power supply module, and transmission antenna, where the sensing module is directly connected to the air-intake through hole, and the battery is easily replaceable using conductive elements, preventing signal attenuation and ensuring accurate and instant gas temperature and pressure detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the metal connection terminal is welded on the circuit board and pressed-fit to the housing, then the electrical connection is established, but the wireless signal will be attenuated and poor contact occurs during operation
Solution Approach 1:
The patent extracts the metal connection terminal from the signal transmission path. The antenna is designed to extend through the housing without being electrically connected to internal metal components, isolating the signal path from sources of attenuation and poor contact.
Solution Approach 2:
The patent introduces an intermediary approach where the antenna extends externally through the housing rather than being internally connected. This external extension acts as a mediator that bypasses the problematic internal metal connection environment, allowing signal transmission without attenuation from internal components.
2Device complexity
If the air-intake mouth is used as an antenna conductor, then the wireless signal transmission is simplified, but oxidation or dirt of the air-intake mouth affects the wireless signal transmission
Solution Approach 1:
The patent segments the antenna system from the air-intake mouth. The antenna is a separate component that extends through the housing independently, while the air-intake mouth remains dedicated to its original function. This segmentation prevents oxidation and dirt from the air-intake mouth from affecting antenna performance.
Solution Approach 2:
The patent introduces an intermediate structure - the antenna extension through the housing - that provides a dedicated signal transmission path separate from the air-intake mouth. This intermediary structure ensures reliable wireless signal transmission without being affected by oxidation or dirt accumulation in the air-intake mouth.
3Device complexity
If the sensing device is disposed on the top of the circuit board and the air-intake through hole is on the bottom seat, then the structure is compact, but the gas must pass through the circuit board causing delayed and inaccurate detection
Solution Approach 1:
The patent inverts the conventional arrangement by placing the sensing device in direct communication with the air-intake through hole. The sensing device detects gas parameters as the gas enters through the hole, eliminating the need for gas to traverse the circuit board. This inversion of the detection pathway ensures instant and accurate detection while maintaining structural compactness.
4Strength
If the battery is disposed in a recess with two battery springs that need to be switched by a sharp object, then the battery is secured, but the replacement is inconvenient and may damage the battery or springs
Solution Approach 1:
The patent employs a battery spring mechanism that replicates the securing function through elastic deformation rather than mechanical interlocking requiring sharp objects. The battery spring naturally compresses to secure the battery and can be easily released by simple upward force, copying the securing effect while eliminating the need for complex release mechanisms.
Solution Approach 2:
The patent designs the battery spring as a simple, easily replaceable component that can be discarded and replaced without special tools. This approach treats the battery spring as a consumable part that maintains its securing function through simple elastic action, making the entire battery replacement process more convenient and less prone to damage.
Data Source
AI summary
A tire temperature and tire pressure wireless sensing device is provided, which includes a housing, a valve body, a power supply module, a circuit board and a transmission antenna. The power supply module is disposed on the fixed seat of the housing, and the circuit board includes a wireless transmission module and a sensing module thereon. The sensing module is disposed corresponding to an air-intake through hole of the bottom seat of the housing. The valve body is engaged with the air-intake through hole and one end of the transmission antenna is disposed in an antenna slot.