Movable Housing Protective Glass for Gravimetric Moisture Measurement
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Solution Overview
Problem
Existing gravimetric moisture determination devices are prone to errors due to high costs, temperature, drying time, and test room conditions, and have inaccurate measurements caused by radiation sources and difficult-to-clean protective glass.
Innovation Solution
A measuring device with a housing that can be easily cleaned, featuring a movable part allowing access to the heating means and protective glass for maintenance, and an electrical contact system that disconnects power during loading and maintenance to prevent burns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a protective glass is arranged between the sample and the means for heating the sample, then the means for heating the sample is protected, but the protective glass becomes difficult to access and clean
Solution Approach 1:
The housing is divided into a stationary housing part and a movable housing part that can be displaced relative to each other. The protective glass is arranged on the movable housing part, which can be moved to a maintenance position where it is accessible for cleaning while maintaining protection during operation.
Solution Approach 2:
The protective glass is made movable by arranging it on the movable housing part rather than fixing it to the stationary housing part. This allows the protective glass to be dynamically repositioned between a measurement position (where it protects the heating means) and a maintenance position (where it is accessible for cleaning).
2Device complexity
If the weighing pan is loaded outside of the measuring device, then the device structure is simplified, but the measurement process becomes more complex and error-prone
Solution Approach 1:
The weighing pan is integrated into the housing structure rather than being separate. The weighing pan is arranged in the housing such that it can be loaded from the inside, combining the weighing function with the housing structure and eliminating the need for external loading mechanisms.
3Power
If radiation sources such as halogen lamps are used for heating the sample, then heating efficiency is improved, but measurement accuracy decreases due to inaccurate value acquisition
Solution Approach 1:
A protective glass is introduced as an intermediary element between the radiation source and the sample. This protective glass filters the radiation to create more uniform heating conditions while allowing accurate measurement of the sample's weight changes during the drying process.
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 device provides accurate and cost-effective gravimetric moisture determination by simplifying maintenance, reducing errors, and ensuring safe operation.
Implementation Method 1
Various sources of radiation such as radiant heaters, microwave generators, halogen and quartz lamps are used as means for heating the sample.
Data Source
Figure 1
Figure 2
Figure 3a~3b
AI summary
Measuring device (210) for gravimetric moisture determination with a housing (220) and a weighing device arranged in the housing (220), wherein the weighing device has a load-bearing surface (260) onto which a sample can be placed, and the housing (220) has a fixed housing part (221) and a movable housing part (222), and the movable housing part (222) can assume a measuring position and a maintenance position, wherein in the measuring position the fixed housing part (221) and the movable housing part (222) form a substantially enclosed test chamber around the load-bearing surface (260), and a means for heating (270) a sample that can be placed on the load-bearing surface (260) is arranged in the test chamber, and in the maintenance position the fixed housing part (221) and the movable housing part (222) are spaced apart from each other such thatthat the heating means (270) is accessible for maintenance purposes and that the heating means (270) is protected by a protective glass (272) which, in the measuring position, is arranged between the means for heating the sample (170) and the load-bearing element (260). According to the invention, the protective glass (272) is arranged on the movable housing part (222) and can be removed without tools in the maintenance position.