Throttle Device Hall Sensor Disturbance Rejection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing throttle opening detection systems are prone to erroneous detection due to disturbance magnetic fields, which are not effectively mitigated by current technologies, especially when strong magnetic fields are nearby.
Innovation Solution
A throttle device design featuring a rotating body with a magnet and a substrate hosting multiple magnetic sensors, where the sensors are positioned to experience different magnetic flux densities, allowing for accurate detection of erroneous grip positions and avoiding abnormal throttle opening detection without additional components or physical barriers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If magnetic sensors are used to detect throttle opening, then detection precision is improved, but reliability deteriorates due to disturbance magnetic fields
Solution Approach 1:
The detection system is segmented into multiple magnetic sensors positioned at different locations. By dividing the detection function across multiple sensors, the system can compare their outputs to identify and eliminate errors caused by disturbance magnetic fields, thereby maintaining reliability while using magnetic sensor technology.
Solution Approach 2:
The system uses feedback from multiple magnetic sensors to continuously monitor and compare detection signals. When a disturbance magnetic field is detected through signal comparison, the system can identify the abnormality and adjust or reject the affected sensor's output, ensuring reliable throttle opening detection despite external magnetic interference.
2Reliability
If multiple magnetic sensors are used to detect abnormality, then reliability is improved, but device complexity increases
Solution Approach 1:
The system divides the detection function among multiple magnetic sensors, with each sensor contributing to the overall reliability. This segmentation allows the system to detect abnormalities through comparison without requiring a completely complex redundant system, as each sensor performs a simple detection function.
Solution Approach 2:
Multiple magnetic sensors are merged into a single integrated detection system where their outputs are processed together. This combining approach allows the system to achieve high reliability through collective detection while managing complexity through unified signal processing and centralized control logic.
3Reliability
If physical distance or cover is provided to avoid disturbance magnetic field, then reliability is improved, but device size increases
Solution Approach 1:
The system replaces mechanical protection methods (physical distance or covers) with an electronic detection and comparison system. Instead of using physical barriers to block magnetic fields, the invention uses multiple magnetic sensors and signal processing to identify and compensate for disturbance fields, thereby maintaining reliability without increasing device size.
Solution Approach 2:
The system changes the approach from physical parameter modification (increasing distance or adding covers) to electrical parameter analysis (comparing sensor signals). By analyzing the parameters of magnetic field signals from multiple sensors, the system can distinguish between legitimate throttle position signals and disturbance fields without altering the physical structure or increasing device volume.
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 design enables reliable avoidance of erroneous throttle opening detection even under the influence of disturbance magnetic fields, increasing design freedom and reducing device size by eliminating the need for special parts or physical distances to counteract the magnetic interference.
Implementation Method 1
a magnet that rotates integrally with the rotating body
Implementation Method 2
a substrate that includes a plurality of magnetic sensors and is fixed to face the magnet. The plurality of magnetic sensors are disposed in such a way that magnetic flux densities different from each other are respectively applied to the plurality of magnetic sensors
Data Source
AI summary
A grip, a magnet 140, and a substrate 150 are included. The grip is rotatable between positions where a throttle is fully closed and a position where the throttle is fully open with a rotating shaft as a center. The magnet 140 rotates integrally with the grip. The substrate 150 includes a plurality of Hall elements 165 and 175, and is fixed to face the magnet 140. The plurality of Hall elements 165 and 175 are disposed in such a way that magnetic flux densities different from each other are respectively applied to the plurality of Hall elements 165 and 175 when an external magnetic field acts in a state where the grip is located in the position where the throttle is fully closed.