Lever Indicator With Magnetic Grid Sensor
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Solution Overview
Problem
Conventional digital display lever indicators have a short service life due to complex mechanical structures and added motion transmission mechanisms, which increase costs and introduce errors, affecting measurement accuracy.
Innovation Solution
A lever indicator design that eliminates the precision motion transmission mechanism between the lever arm and the moving grid by using a microcontroller to calculate measurements from a capacitive, magnetic, or CCD displacement sensor, with a liquid crystal display for digital results, and incorporates an anti-slanting-swinging mechanism to maintain a constant gap between the fixing and moving grids.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a motion transmission mechanism is added between the lever arm and the round dial to enable rotation, then the lever indicator can function, but the cost increases and measurement accuracy deteriorates due to introduced errors
Solution Approach 1:
The patent replaces the mechanical motion transmission mechanism (gears, sector gears) with a magnetic field-based detection system. The measuring lever directly drives the moving grid without intermediate mechanical transmission, and the magnetic grid sensor detects the position through magnetic field interaction, eliminating mechanical error sources while maintaining functional capability.
Solution Approach 2:
The patent introduces a magnetic field as an intermediary between the measuring lever and the detection system. The magnetic grid sensor uses magnetic field lines to detect the position of the moving grid, which is driven by the measuring lever, providing a non-contact transmission path that avoids mechanical errors.
2Ease of operation
If a motion transmission mechanism is added between the lever arm and the round dial, then the lever indicator can function, but the service life shortens due to component wear
Solution Approach 1:
The patent eliminates mechanical gear transmission components that are subject to wear by using direct magnetic field-based position detection. The measuring lever directly drives the moving grid, and the magnetic sensor detects position without physical contact, removing the wear mechanism and extending service life.
Solution Approach 2:
The magnetic field serves as a non-contact intermediary that transmits motion information from the measuring lever to the sensor without physical contact. This eliminates mechanical wear between components while maintaining the functional relationship needed for measurement.
3Ease of operation
If a motion transmission mechanism is added between the lever arm and the round dial, then the lever indicator can function, but production costs increase
Solution Approach 1:
The patent replaces complex mechanical transmission components (gears, sector gears, rotating shafts) with a simpler direct-drive structure where the measuring lever directly drives the moving grid. The magnetic grid sensor replaces the need for mechanical indication mechanisms, reducing part count and manufacturing complexity while maintaining functionality.
Solution Approach 2:
The patent extracts and removes the unnecessary motion transmission mechanism from the system. By using direct magnetic field-based detection, the design eliminates intermediate transmission components, simplifying the structure and reducing production costs while preserving the essential measurement function.
4Ease of operation
If multi-stage motion transmission is used, then the lever indicator can function, but measurement accuracy deteriorates due to accumulated errors
Solution Approach 1:
The patent replaces multi-stage mechanical motion transmission with a single-stage direct drive system where the measuring lever directly drives the moving grid. The magnetic grid sensor detects position through magnetic field interaction without mechanical intermediaries, eliminating accumulated transmission errors while maintaining measurement functionality.
Solution Approach 2:
The magnetic field acts as a clean intermediary that directly couples the motion of the measuring lever to the detection system without mechanical transmission stages. This eliminates gear backlash, friction, and cumulative errors associated with multi-stage mechanical transmission while preserving the functional relationship.
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 reduces production costs, minimizes errors from multi-stage transmission, and significantly improves measurement accuracy by eliminating intermediate motion transmission and ensuring a constant gap between the grids.
Implementation Method 1
capacitive grid sensor
Implementation Method 2
magnetic grid sensor
Implementation Method 3
CCD displacement sensor
Data Source
AI summary
The lever indicator includes a housing, a measuring lever, a displacement sensor and a microcontroller. After extending to the interior of the housing, a tail end of the measuring lever synchronously swings with the displacement sensor for measurement. The microcontroller is located in the housing, and amends and calculates a measurement result according to a signal generated by the swinging of the displacement sensor, and a liquid crystal display for displaying the measurement result is further arranged outside the housing. The displacement sensor includes a fixing grid and a moving grid of a sector structure. The fixing grid is fixed inside the housing, and is correspondingly located above the tail end of the measuring lever. The moving grid is fixed onto the tail end of the measuring lever and swings relative to the fixing grid after linked with the measuring lever.