Magnetic Position Switch Calibration for Hall Sensor Mounting Deviations
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Solution Overview
Problem
The accuracy of position detection decreases due to deviations in the installation of a Hall IC, which affects the precision of magnet position detection.
Innovation Solution
A position detecting switch with a magnetic sensor that determines whether the detected magnetism lies within predetermined ranges, set by an operator, to enhance accuracy, and an actuator with an accommodation unit for the movable body, ensuring precise magnet position detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a Hall IC is used for position detection, then position detection capability is provided, but detection accuracy decreases when installation position deviates from the designed position
Solution Approach 1:
The patent changes the parameter of detection range by allowing dynamic adjustment of the predetermined range based on operator input. The control unit sets the predetermined range to include the detected value at the specified position, effectively adapting the detection parameters to compensate for installation deviations and maintain accurate position detection despite manufacturing variations in sensor placement.
2Ease of manufacture
If the magnetic sensor is attached with reduced accuracy, then ease of installation is improved, but position detection accuracy decreases
Solution Approach 1:
The system performs self-adjustment by allowing the operator to specify the actual position of the movable body, and the control unit automatically sets the predetermined range based on the detected value at that specified position. This self-service mechanism compensates for installation inaccuracies without requiring high-precision mounting procedures.
Solution Approach 2:
The patent implements a preliminary setting step where the operator specifies the position of the movable body before normal operation begins. The control unit uses this information to pre-set the predetermined range, ensuring accurate position detection is established in advance to compensate for any installation deviations.
3Device complexity
If a fixed predetermined range is used, then device complexity is reduced, but adaptability to installation variations decreases
Solution Approach 1:
The patent introduces dynamic adaptability by allowing the predetermined range to be set based on the detected value at the operator-specified position. This dynamic adjustment mechanism enables the system to adapt to different installation conditions while maintaining relatively simple control logic through automated range setting.
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
Prevents a decrease in detection accuracy by allowing for precise setting of detection ranges, enhancing the reliability of position detection in movable bodies.
Implementation Method 1
a magnetic sensor configured to detect magnetism of the magnet, and to output a detected value in accordance with the magnetism
Data Source
AI summary
A position detecting switch detects the position of a movable body that is capable of moving in a predetermined direction, based on a magnet attached to the movable body. The position detecting switch is equipped with a magnetic sensor that detects the magnetism of the magnet, and outputs a detected value in accordance with the magnetism, a determination unit that determines whether or not the detected value lies within a predetermined range, and a setting unit that sets the predetermined range centrally around the detected value at a specified position which is a position of the movable body specified by an operator.