Characteristic Measuring Device Double Fastening Mechanism
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Solution Overview
Problem
Existing characteristic measuring devices face challenges in maintaining a consistent pre-load during switching between floating-mass and fixed states due to positional variation of the reaction-force section, leading to inefficiencies and potential air leakage.
Innovation Solution
A characteristic measuring device with a double fastening mechanism that includes two actuators to support the reaction-force section, maintaining its height relative to the middle surface plate in both states, and a reaction-force-section height-holding means using a displacement detector to control air spring pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single fastening mechanism is used to switch between floating-mass and fixed states, then the device complexity is reduced, but the pre-load consistency deteriorates due to positional variation of the reaction-force section
Solution Approach 1:
The fastening mechanism is divided into two independent actuators: a first actuator that fastens the reaction-force section to the middle surface plate, and a second actuator that fastens the middle surface plate to the base part. This segmentation allows each actuator to independently control a specific fastening interface, eliminating the positional variation problem that occurs with a single fastening mechanism while maintaining manageable device complexity.
2Ease of operation
If the reaction-force section is allowed to move freely during state switching, then the ease of operation is improved, but the measurement precision deteriorates due to pre-load variation
Solution Approach 1:
The control device performs preliminary actions by sequentially activating the first and second actuators in a specific order during state transitions. Before completing the fastening process, the control device ensures that the reaction-force section is properly positioned and supported, preventing unwanted movement. This preliminary control maintains measurement precision while still allowing smooth state switching operation.
3Manufacturing precision
If air spring pressure is increased to maintain pre-load during switching, then the pre-load consistency is improved, but the loss of energy worsens due to air leakage
Solution Approach 1:
The control device acts as an intermediary that coordinates the activation of the first and second actuators with the air spring pressure control. By precisely timing the actuator operations and air pressure adjustments, the control device maintains pre-load consistency during transitions without requiring excessive air spring pressure, thereby minimizing air leakage and energy loss.
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
Enables smooth switching between states while maintaining a predetermined pre-load, reducing air leakage and positional variations, thus enhancing measurement consistency and efficiency.
Implementation Method 1
an air spring arranged between the middle surface plate and the reaction-force section
Implementation Method 2
a displacement detector that detects a position of the reaction-force section
Data Source
AI summary
To provide a characteristic measuring device capable of smoothly switch switching between a floating-mass state and a fixed state, while a predetermined pre-load is maintained. In a characteristic measuring device, a support part includes an air spring and a double fastening mechanism each arranged between a middle surface plate and a reaction-force section, the double fastening mechanism includes a first actuator fixed to the reaction-force section and a second actuator fixed to the middle surface plate, and the reaction-force section is not supported in the floating-mass state and is supported in the fixed state by the first actuator and the second actuator. In this way, a problem of the prior art (pre-load variation) is eliminated, and switching between the floating-mass state and the fixed state can be smoothly achieved.