Compact Weighing Module Transverse Calibration Design
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing high-precision weighing modules, particularly those using electromagnetic force sensors, suffer from weak overload resistance, poor reliability, and high cost, while strain sensors lack an integrated internal calibration system, making them unsuitable for compact applications with demanding automation requirements.
Innovation Solution
An integrated high-precision weighing module is designed with a transverse arrangement of the internal calibration system, sensor main body, and lever, incorporating a labyrinth-ring scale pan, a support system with an electric motor, and a V-shaped recess for the internal calibration weight, which reduces module width and enhances reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an electromagnetic force sensor module is integrated with an internal calibration system, then calibration function is provided, but the module width increases and cost increases
Solution Approach 1:
The patent changes the arrangement dimension from width direction to length direction. The internal calibration weight is arranged along the length direction of the elastic body rather than the width direction, allowing the calibration function to be integrated without increasing module width. This dimensional reorientation resolves the contradiction between providing calibration function and maintaining compact width.
Solution Approach 2:
The internal calibration weight is nested within the structure defined by the elastic body, with the calibration weight positioned inside the spatial envelope created by the elastic body's deformation path. This nesting allows the calibration component to be contained within the existing structural boundaries without requiring additional width space.
2Reliability
If an electromagnetic force sensor module is integrated with an internal calibration system, then calibration function is provided, but manufacturing cost increases
Solution Approach 1:
The patent merges the calibration function with the existing elastic body structure by arranging the internal calibration weight along the length direction within the same structural envelope. This integration allows a single elastic body to serve both sensing and calibration purposes, eliminating the need for separate calibration mechanisms and reducing overall manufacturing cost.
Solution Approach 2:
The elastic body is designed to serve multiple functions: it acts as the sensing element for weight measurement and simultaneously provides the structural framework for the internal calibration weight. This multi-functionality reduces the total component count and manufacturing complexity, thereby lowering production costs while maintaining calibration capability.
3Area of stationary object
If a strain sensor is used, then the sensor is slender and narrow, but it lacks an integrated internal calibration system
Solution Approach 1:
The patent resolves the contradiction by arranging the internal calibration weight along the length direction of the elastic body rather than requiring width expansion. This allows the slender, narrow form factor of the strain sensor to be maintained while integrating the calibration function within the same spatial envelope.
4Measurement precision
If an electromagnetic force sensor is used, then high-precision performance is achieved, but overload resistance capability is weak
Solution Approach 1:
The patent incorporates an overload protection structure that acts as a mechanical fuse or limit stop within the elastic body system. This structure is designed to engage before the electromagnetic force sensor reaches its damage threshold, providing beforehand cushioning against overload conditions. The limit structure physically restricts the maximum deformation of the elastic body, preventing sensor damage while allowing normal high-precision operation.
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 provides a compact, cost-effective, and reliable weighing module with improved long-term performance, easy maintenance, and enhanced overload resistance, suitable for small-area applications like packaging, while ensuring dustproof and waterproof operation.
Implementation Method 1
an electric motor, wherein the electric motor and the support are attached to the mounting base plate
Implementation Method 2
a lever, wherein the scale pan is mounted on the lever, and the lever is connected to the sensor main body
Data Source
AI summary
An integrated high-precision weighing module is provided which includes a scale pan, a lever, an internal calibration system, a bottom plate assembly, and a sensor main body. The scale pan is mounted on the lever, and the lever is connected to the sensor main body. The internal calibration system, the sensor main body and the lever are arranged transversely, and the internal calibration system and the sensor main body are respectively attached to the bottom plate assembly.