Hardness Tester Force Fluctuation Detection and Interruption
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Solution Overview
Problem
Conventional hardness testers lack the ability to detect and respond to fluctuations in test force during measurements, leading to reduced accuracy and unawareness of incorrect calculated hardness values due to external factors like user interference or environmental vibrations.
Innovation Solution
A hardness tester equipped with a detector and controller that monitors the test force and executes an interrupt or notification process when the force exceeds a predefined margin, reducing the test force to a predetermined value and alerting the user to potential measurement errors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the hardness tester continues the test even when test force fluctuation occurs, then the test can complete without interruption, but the measurement accuracy is reduced and incorrect hardness values are calculated
Solution Approach 1:
The controller continuously monitors the test force through the detector and compares it against the predetermined test force. When a fluctuation exceeding the allowable margin is detected, the system provides feedback by executing an interrupt process to stop the test or notifying the user, thereby preventing inaccurate measurements while maintaining test completion.
2Measurement precision
If the hardness tester monitors test force fluctuations and interrupts the test, then the measurement accuracy is improved, but the test productivity is reduced due to interruptions
Solution Approach 1:
The system changes the operational state based on detected parameters. When test force fluctuation exceeds the allowable margin, the controller changes the test state from continuous to interrupted or notified, allowing accuracy improvement while minimizing productivity loss by only interrupting when necessary rather than continuously.
3Measurement precision
If the hardness tester uses a strict threshold for test force fluctuation, then the measurement accuracy is improved, but the ease of operation is reduced as users must set precise margins
Solution Approach 1:
The system applies a predetermined allowable margin that is intentionally set to accommodate normal variations. This partial action approach uses a reasonable threshold rather than an extremely strict one, balancing measurement accuracy with ease of operation by allowing minor fluctuations without triggering interruptions.
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
Ensures accurate hardness measurements by interrupting the test and notifying the user of force fluctuations, preventing incorrect calculations and allowing for corrective action.
Implementation Method 1
a detector detecting a value for the test force loaded onto the indenter by the test force loader
Data Source
AI summary
A hardness tester includes an indenter, an arm and a driver which loads a test force onto the indenter and press the indenter against a sample, a spring displacement amount sensor detecting a value for the test force loaded onto the indenter, and a controller. In a state where a predetermined test force (total test force) is loaded onto the indenter by the driver, when the value of the test force detected by the spring displacement amount sensor exceeds a predefined allowable margin relative to the predetermined test force, the controller executes predetermined processes, including an interrupt process interrupting the test currently being executed and a notification process notifying a user that the value of the test force exceeded the allowable margin during execution of the test.