Calibrating Large Fixed Electronic Scales Without Weights
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Solution Overview
Problem
Conventional methods for calibrating large fixed electronic scales using standard weights or substitutes are inefficient, unsafe, and costly, with high workloads and inaccuracies due to the need for transporting and positioning heavy weights, which is impractical and often impossible for large scales like 100 t truck scales.
Innovation Solution
A method employing an auxiliary verification device with self-locating loading and unloading mechanisms and high accuracy load gauges to calibrate large fixed electronic scales without using weights, allowing for direct verification of the scale's supporting points and automatic load control, reducing the need for heavy weight transport and positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If standard weights or substitutes are used to calibrate large fixed electronic scales, then calibration accuracy can be achieved, but the workload, time, and cost increase significantly due to the need to transport and position heavy weights
Solution Approach 1:
The patent replaces the traditional mechanical system of transporting and positioning heavy standard weights with a hydraulic loading device that can apply calibrated forces directly to the scale. This substitution eliminates the need for physical weight transport while maintaining calibration accuracy through controlled hydraulic force application.
Solution Approach 2:
The patent introduces a hydraulic loading device as an intermediary between the calibration process and the scale. This intermediary device applies forces through loading points on the scale structure, serving as a mediator that transfers calibrated force without requiring direct physical contact with heavy standard weights.
2Measurement precision
If standard weights are used for calibration, then measurement accuracy is maintained, but safety risks and transportation costs increase due to handling heavy loads
Solution Approach 1:
The patent replaces the hazardous mechanical handling of heavy standard weights with a controlled hydraulic system. The hydraulic loading device applies forces through controlled fluid pressure, eliminating safety risks associated with manual handling and transportation of heavy weights while maintaining verification accuracy.
3Measurement precision
If conventional calibration methods using standard weights are employed, then calibration can be performed, but the process becomes complex and time-consuming due to multiple positioning and verification steps
Solution Approach 1:
The patent simplifies the calibration process by introducing a hydraulic loading device as an intermediary that can directly apply calibrated forces to multiple loading points on the scale. This intermediary system integrates force application, positioning, and verification into a unified process, reducing the complexity of multiple separate steps required in traditional weight-based calibration.
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 approach significantly reduces the workload, time, and cost of calibration, ensuring high accuracy and safety by using a lightweight verification device that can verify large scales efficiently, cutting transportation and labor costs by half and completing verifications in a fraction of the time required by traditional methods.
Implementation Method 1
loading and unloading every supporting point on a scale table board of the scale by at least four self-locating loading and unloading mechanisms; applying at least four high accuracy load gauges to measure and display a load that each of the loading and unloading mechanisms applies to the scale table board
Implementation Method 2
applying at least four high accuracy load gauges to measure and display a load that each of the loading and unloading mechanisms applies to the scale table board
Data Source
AI summary
A method for calibrating large fixed electronic scale is provided. The method applies an auxiliary verification device to calibrate the large fixed electronic scale without using a weight and includes following steps of: loading and unloading every supporting point on the scale table board of the scale by at least one self-locating loading and unloading mechanism; measuring and displaying a load that each loading and unloading mechanisms applies to the scale table board by at least one high accuracy load gauge; controlling a size of the load that each loading and unloading mechanisms applies to the scale table board by a constant load control device; and comparing a precise load displayed by the high accuracy load gauge with a gauge weighing display value of the scale to obtain a calibration error of the scale. The present method greatly improves working efficiency and safety and reduces costs.