Electric Motorcycle TPMS Receiver Layout to Avoid Battery Shielding
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Solution Overview
Problem
Conventional electric motorcycles suffer from poor signal connection due to wireless signals being easily shielded by the battery located between the front and rear wheels, affecting the functionality of wireless modules.
Innovation Solution
The wireless apparatus is designed with the receiver positioned on the left or right side of the frame, tire pressure sensors on the wheels, and the instrument above the battery, using 2.4 GHz frequency signals, while the motor and motor controller are placed below or behind the battery to avoid interference, and a wireless communication module operates with an LTE protocol.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the battery is disposed inside the frame between the front wheel and the rear wheel, then the battery structure is compact and space is efficiently utilized, but wireless signals traveling in a longitudinal direction are easily shielded by the battery structure, causing poor signal connection
Solution Approach 1:
The receiver is repositioned from a longitudinal arrangement (front-to-rear) to a lateral arrangement (left-to-right side of the frame). This dimensional change in signal transmission path allows signals to bypass the battery located between front and rear wheels, eliminating shielding while maintaining compact battery placement.
2Device complexity
If the receiver is placed in the conventional position, then the device structure is simple, but the receiver cannot stably receive signals due to battery shielding
Solution Approach 1:
The receiver is extracted from the conventional longitudinal position and relocated to the lateral position on the left or right side of the frame. This extraction removes the receiver from the battery's shielding zone, enabling stable signal reception while keeping the overall device structure relatively simple.
3Device complexity
If wireless communication modules operate in the same frequency band, then device complexity is reduced, but signal interference occurs between modules
Solution Approach 1:
Different communication modules are assigned to operate in different frequency bands. The wireless tire pressure communication uses 2.4 GHz frequency band, while the LTE wireless communication module operates in a separate frequency band. This parameter change in operating frequency eliminates signal interference between modules while maintaining relatively simple device configuration.
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 enhances signal quality and stability by avoiding battery shielding, allowing reliable communication between tire pressure sensors and the receiver, and adds Internet of Things functions via the LTE module.
Implementation Method 1
a front wheel tire pressure sensor disposed at the front wheel and communicating with the receiver via a wireless communication; and a rear wheel tire pressure sensor disposed at the rear wheel and communicating with the receiver via a wireless communication
Data Source
AI summary
A wireless apparatus of an electric motorcycle is assembled to a body of the electric motorcycle and has a receiver, a front wheel tire pressure sensor, and a rear tire pressure detector. The receiver is disposed at and extends out from one of a left side and a right side of a frame of the body. The front wheel tire pressure sensor and the rear wheel tire pressure sensor are disposed at a front wheel and a rear wheel of the body, respectively, and communicate with the receiver via wireless communications. Wherein, the receiver is located aside to prevent shielding effect caused by a battery of the body, thereby enhancing signal quality to allow the receiver to stably receive signals from the front wheel tire pressure sensor and the rear wheel tire pressure sensor.