Movable Housing Gravimetric Moisture Instrument
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Solution Overview
Problem
Existing gravimetric moisture determination instruments are prone to inaccuracies due to the nature and arrangement of radiation sources used for sample heating, which also pose a safety risk during loading and unloading, as these sources are exposed and can cause user injury.
Innovation Solution
A measuring instrument design with a movable housing part that allows for a safe loading position where the temperature sensor is repositioned away from the user, ensuring the sample-heating means is enclosed and reducing the risk of injury, while maintaining accurate temperature measurement by keeping the temperature sensor close to the sample during measurement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the radiation source is openly exposed during loading process, then the user can easily load and unload samples, but the radiation source and oven walls become hot and pose a risk of injury to the user
Solution Approach 1:
The housing part is designed to be movable between loading position and measuring position. During loading, the housing part is in the loading position allowing easy access. During measurement, it moves to the measuring position to enclose the testing compartment and protect the user from hot radiation sources and oven walls.
Solution Approach 2:
The housing is divided into a stationary housing part and a movable housing part. The movable housing part can be shifted between loading position and measuring position, allowing the testing compartment to be enclosed during measurement while remaining accessible during loading.
2Measurement precision
If the temperature sensor is positioned above the load receiver during measurement, then accurate temperature measurement is achieved, but the sensor obstructs the user during loading process
Solution Approach 1:
The temperature sensor is mounted on the movable housing part and moves with it. During measurement, the sensor is positioned above the load receiver for accurate temperature monitoring. During loading, the movable housing part shifts to the loading position, moving the sensor out of the way to the side of the load receiver, eliminating obstruction.
3Object-affected harmful factors
If the movable housing part is used to enclose the testing compartment, then user safety is improved by protecting from hot surfaces, but the device complexity increases
Solution Approach 1:
The housing is segmented into a stationary housing part and a movable housing part. This segmentation allows the movable part to shift between loading and measuring positions, enclosing the testing compartment during measurement to protect users from hot surfaces while maintaining simplicity through functional separation.
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 design enhances user safety by preventing accidental exposure to hot radiation sources during loading and unloading, while ensuring accurate temperature measurement and operation by maintaining the temperature sensor's proximity to the sample during measurement.
Implementation Method 1
A temperature sensor (80) is arranged so that in the measuring position the temperature sensor occupies a place above the load receiver and in the loading position its place is essentially to the side of the load receiver
Implementation Method 2
Devices that are used as sample-heating means include a variety of radiation sources such as radiant heaters, microwave generators, halogen- and quartz lamps
Data Source
AI summary
An instrument (10) for gravimetrically determining moisture content has a housing (20), with a weighing device (40) arranged inside. The weighing device (40) has a load receiver (60) onto which a sample (62) is placed. The housing has a lower, stationary housing part (21) and an upper, movable housing part (22), the movable housing part alternately occupying a measuring position and a loading position. In the loading position, the respective housing parts are spaced apart from each other, allowing a sample to be put on the load receiver. In the measuring position, the respective housing parts form an essentially enclosed testing compartment (30) that surrounds the load receiver. A temperature sensor (80) is arranged so that the temperature sensor is above the load receiver in the measuring position and is essentially to the side of the load receiver in the loading position.