Magnetic Pulse Signal Generator for Precise Vehicle Speed
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Solution Overview
Problem
Existing systems for determining vehicle speed, particularly in bicycles, lack precision and reliability, especially when external factors interfere with signal detection.
Innovation Solution
A signal generator that generates a temporally and spatially varying magnetic field with adjustable signal duration and strength, integrated with a vehicle's electronics to provide precise speed determination, using a detachable design and wireless communication for data exchange.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If existing signal systems are used for speed determination, then the system is simple, but the measurement precision and reliability are insufficient especially under external interference
Solution Approach 1:
The signal generator produces periodic magnetic field pulses with specific duration (5-40ms) and varying amplitude during each pulse. This periodic signal structure enables precise speed determination through frequency and amplitude analysis, while the controlled pulse duration optimizes signal detection without requiring continuous complex signaling.
Solution Approach 2:
The signal strength (amplitude) varies dynamically during the signal duration, creating a temporally structured magnetic field signal. This dynamic amplitude modulation within each pulse provides additional information for precise speed measurement and helps distinguish the signal from static or slowly varying external interference.
2Reliability
If signal duration is extended to improve detection reliability, then the signal strength is sufficient, but the response time increases and may cause loss of time
Solution Approach 1:
The signal duration is optimized to a specific range (5-40ms) that balances detection reliability with response time requirements. The amplitude parameter varies during this duration to enhance signal detectability, allowing reliable speed determination within a controlled time window that minimizes time loss while ensuring sufficient detection confidence.
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
Enables accurate and reliable speed detection, adaptable to various vehicle configurations, enhancing control and assistance systems.
Implementation Method 1
a field generating unit (106, 106a) for generating a signal in the form of a temporally and/or spatially varying magnetic field
Data Source
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AI summary
The invention relates to at least one, in particular exactly one, signal transmitter for determining a vehicle speed, especially a bicycle speed, comprising a first field generation unit configured to generate a signal in the form of a temporally and/or spatially varying magnetic field, wherein the signal transmitter includes electronics for controlling or regulating the first field generation unit. It is proposed that the signal has a duration in the range between 5 ms and 40 ms, in particular between 8 and 25 ms, preferably between 10 and 18 ms, and/or that the signal has a strength that varies during the duration, the strength preferably being configured as an amplitude of the signal.