Magnetic Detection Device Resistance Adjusting Unit
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Solution Overview
Problem
Conventional magnetic detection devices face challenges in achieving a wide adjustment range of resistance values and complex adjustment operations due to the limitations of trimming resistive films, which result in small changes in overall resistance and require complicated calculations and structures.
Innovation Solution
A magnetic detection device with a resistance adjusting unit comprising serially connected parallel portions of resistance elements, where the combined resistance values can be adjusted by bringing specific resistance elements into a non-conduction state, allowing for a wide range of adjustments and simplifying the adjustment process by varying the intervals between conductive layers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If resistive films are trimmed to adjust resistance value, then resistance adjustment is achieved, but the adjustment range is limited and the structure becomes complicated
Solution Approach 1:
The resistance adjusting unit is divided into multiple parallel portions, each containing multiple resistance elements that can be independently connected or disconnected. This segmentation allows for granular adjustment of the total resistance value by selectively bringing resistance elements into or out of the conduction state, achieving a wide adjustment range without requiring complex trimming operations on large resistive films.
Solution Approach 2:
The resistance value is made dynamically adjustable through the resistance adjusting unit, which can change its combined resistance value by bringing resistance elements into a non-conduction state. This dynamic adjustment mechanism replaces static trimming approaches, allowing flexible adaptation of resistance values to optimize the midpoint potential detection accuracy.
2Adaptability or versatility
If multiple square frames are provided to increase adjustment range, then resistance adjustment flexibility improves, but the adjustment operation becomes more complicated
Solution Approach 1:
Instead of using multiple complex square frames requiring complicated calculation formulas, the invention segments the resistance adjusting unit into parallel portions with multiple resistance elements. This allows simple selective disconnection of individual resistance elements to achieve desired resistance values, greatly simplifying the adjustment operation while maintaining wide adjustment range.
Solution Approach 2:
The invention changes the adjustment parameter from complex geometric trimming of square frames to simple switching of resistance elements in parallel portions. By varying which resistance elements are in the conduction state, the total resistance can be easily adjusted without requiring complicated calculations or complex adjustment operations.
3Adaptability or versatility
If resistive films are trimmed to adjust resistance, then resistance value can be modified, but the amount of change is small and difficult to achieve wide adjustment range
Solution Approach 1:
The resistance adjusting unit is segmented into multiple parallel portions with multiple resistance elements each. By selectively disconnecting individual resistance elements, the total resistance can be adjusted in discrete steps, achieving both wide adjustment range and precise control. This segmentation approach replaces the continuous but limited trimming method with a stepped adjustment mechanism that provides finer control.
Solution Approach 2:
Instead of trimming small portions of resistive films to achieve small resistance changes, the invention uses parallel portions where resistance elements can be completely disconnected. This partial action approach (completely removing certain resistance paths) enables larger resistance changes while maintaining precision through the selective combination of remaining elements.
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
The solution enables easy and accurate adjustment of resistance values, providing a wide adjustment range and balancing the resistance values of variable and reference resistance elements, enhancing the detection accuracy and operational simplicity.
Implementation Method 1
a variable resistance element having an electrical resistance changed by an external magnetic field
Data Source
AI summary
In a magnetic detection device for obtaining an output from between a variable resistance element using the magnetoresistance effect and a reference resistance element, a balance between resistance values in the device can be easily adjusted in a wide range. A voltage is applied to a resistance adjusting unit, a reference resistance element, and a variable resistance element, which are serially connected, and is also applied to another variable resistance element, another reference resistance element, and another resistance adjusting unit, which are serially connected. When subjected to a magnetic field of a predetermined size, resistance values of the variable resistance elements change, and as a result, the potentials of output terminals change. Each of the resistance adjusting units includes serially connected parallel portions each including a plurality of parallel connected resistance elements. The resistance value of the resistance adjusting unit can be changed by bringing one of the parallel connected resistance elements into a non-conduction state.