Liquid Micrometer for Accurate Wet Work Sizing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Gas micrometers face significant measurement errors due to compressibility and temperature sensitivity, and are unsuitable for measuring non-dry works, as they are affected by viscosity variations and cannot maintain a constant flow rate effectively.
Innovation Solution
A liquid micrometer system that includes a liquid flow path, a flow rate sensor, a control valve, a pressure sensor, and a calculating section to maintain a constant flow rate, using low viscosity liquid and materials like metal or glass for the flow path and nozzle, allowing precise size measurement without drying the work.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If gas is used for measurement, then the measurement can be performed easily, but measurement error becomes large due to compressibility and temperature sensitivity
Solution Approach 1:
The invention changes the physical state parameter of the measurement medium from gas to liquid. This fundamental parameter change eliminates compressibility effects and reduces temperature sensitivity, thereby resolving the contradiction between ease of operation and measurement precision.
2Ease of operation
If gas is used for measurement, then the measurement process is simple, but the work cannot be measured without drying due to gas compressibility and viscosity variations
Solution Approach 1:
By changing the measurement medium from gas to liquid, the invention eliminates the harmful effects of gas compressibility and temperature-induced viscosity variations. This allows measurement of wet works without drying while maintaining measurement accuracy.
3Reliability
If flow rate control is implemented using a control valve, then flow rate can be maintained constant, but device complexity increases
Solution Approach 1:
The invention implements a feedback control system where a flow rate sensor continuously monitors the actual flow rate and feeds this information back to a controller. The controller adjusts the control valve to maintain constant flow rate, resolving the contradiction between flow rate reliability and device complexity through automated feedback control.
Solution Approach 2:
The invention replaces manual mechanical flow rate adjustment with an automated control system comprising electronic sensors and controllers. This substitution reduces the complexity of manual operation while improving flow rate constancy through precise electronic control.
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 liquid micrometer reduces measurement errors by minimizing compressibility and temperature effects, enabling accurate size measurement of wet works with reduced calculation load and easy flow rate control, while avoiding drying of the work.
Implementation Method 1
a flow rate sensor provided in the liquid flow path... a plurality of pressure sensors, any of the pressure sensors constituting the flow rate sensor is used as the pressure sensor which measures the pressure of the liquid injected from the discharge nozzle
Implementation Method 2
a pressure sensor which measures pressure of the liquid injected from the discharge nozzle
Data Source
AI summary
A liquid micrometer which includes: a liquid flow path which supplies liquid from a liquid supply device to a discharge nozzle; a flow rate sensor provided in the liquid flow path; a control valve provided in the liquid flow path between the liquid supply device and the flow rate sensor; a controller which controls the control valve such that a flow rate measured by the flow rate sensor becomes equal to a set value; a pressure sensor which measures pressure of the liquid injected from the discharge nozzle; and a calculating section which calculates the size of a work from the pressure measured by the pressure sensor in a state where the flow rate is maintained at the set value by the controller.