GPS Antenna Positioning for Motorcycle Signal Reception
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Solution Overview
Problem
Straddle-type vehicles, such as motorcycles, face challenges in maintaining good GPS receiving sensitivity due to obstructions from vehicle components and the rider's presence, which degrades the antenna's ability to receive GPS signals effectively.
Innovation Solution
The GPS unit is positioned above the taillight and behind the seat, with the antenna placed higher than the frame, and stored in a storage member that includes an upper plate, front plate, and side plates, reducing obstructions and enhancing sensitivity. The storage member is designed to be securely attached to the frame and side covers, making it difficult to remove without disassembling the seat and other components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the GPS unit is positioned in conventional locations (front cover, rear upper cover, or other areas not hidden by driver), then the GPS unit is easily accessible and installable, but the receiving sensitivity is degraded due to obstructions from vehicle components and rider presence
Solution Approach 1:
The patent positions the GPS antenna in the vertical dimension above the taillight assembly, specifically on the rear plate extending upward from the taillight housing. This vertical placement elevates the antenna above most vehicle components and rider obstruction, improving signal reception without requiring complex lateral repositioning or structural modifications to the vehicle frame.
2Measurement precision
If the GPS unit is positioned above the taillight behind the seat, then obstructions to signal reception are minimized, but the GPS unit becomes more difficult to access and tamper with
Solution Approach 1:
The GPS unit is pre-integrated into the taillight assembly structure during vehicle manufacturing, with the antenna mounted on the rear plate and the receiver unit housed within the taillight housing. This preliminary integration ensures optimal positioning for signal reception while making the GPS components inaccessible to unauthorized persons, as removing them would require disassembly of the taillight assembly itself.
3Measurement precision
If the antenna is positioned higher than the frame and behind the seat, then signal reception is improved, but the GPS unit becomes more vulnerable to theft and tampering
Solution Approach 1:
The patent merges the GPS antenna and receiver unit with the taillight assembly as an integrated component. The antenna is mounted on the rear plate of the taillight housing, and the receiver is housed within the same structure, making the GPS system inseparable from the vehicle's lighting system. This integration ensures that any attempt to remove or tamper with the GPS unit would also damage the taillight assembly, thereby deterring theft and unauthorized access.
Data Source
AI summary
The present invention relates to a straddle-type vehicle, in particular a motorcycle, comprising: a frame extending from a front to a back of the straddle-type vehicle; a seat provided above a rear part of the frame; a taillight; and a Global Positioning System (GPS) unit provided above the taillight, wherein the GPS unit comprises at least an antenna provided in a position higher than the frame and behind the seat.