Gravimetric Moisture Measuring Device with Movable Housing
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Solution Overview
Problem
Existing measuring devices for gravimetric moisture determination are prone to errors and pose safety risks due to the need for manual handling of hot heating elements and potential electric shock during maintenance, and they require extensive workflows that are costly and inaccurate.
Innovation Solution
A measuring device with a housing that has a stationary and movable part, where the heating element is only powered in the measuring position, ensuring safe handling by disconnecting electricity during loading and maintenance, and using a rotatable concentric plug-in connection for reliable electrical contact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the heating element remains powered during loading and maintenance, then the device structure is simpler, but the risk of burns and electric shock increases
Solution Approach 1:
The patent implements a movable housing part that can shift between loading position and measuring position. The electrical contact means is designed to be dynamically connected or disconnected based on the position of the movable housing part. When in loading position, the electrical connection is interrupted, ensuring safety. When in measuring position, the connection is established for normal operation. This dynamic positioning mechanism resolves the contradiction by making the system adaptive to different operational states.
Solution Approach 2:
The patent employs a spring element that prestresses the movable housing part in the measuring position. This preliminary action ensures that the electrical contact means is automatically connected during normal operation without requiring additional control mechanisms. The spring force maintains reliable electrical contact while allowing automatic disconnection when the housing part moves to loading position, thus preventing harmful effects before they can occur.
2Productivity
If the electrical connection is continuously established, then the operational readiness is higher, but the safety during maintenance decreases
Solution Approach 1:
The electrical contact means is designed to be position-dependent, automatically establishing or interrupting electrical connection based on whether the device is in measuring or loading position. This dynamic behavior ensures the heating element is only powered when actually needed for measurement, maintaining high operational readiness during measuring cycles while ensuring safety during loading and maintenance operations.
Solution Approach 2:
The system uses the position of the movable housing part itself to control the electrical connection state. When the housing part is moved to loading position for maintenance, the electrical connection is automatically interrupted without requiring separate control actions. This self-service mechanism ensures safety while maintaining operational readiness, as the system automatically adapts its electrical state to the current operational phase.
3Device complexity
If manual handling of hot heating elements is required, then the device structure is simpler, but the ease of operation deteriorates
Solution Approach 1:
The heating element is integrated with the movable housing part and is automatically positioned away from the user's reach when the housing part is in loading position. The electrical connection is simultaneously interrupted, ensuring the heating element cannot be accidentally activated. This dynamic positioning and control integration eliminates the need for manual handling of hot elements while maintaining simple device structure.
Solution Approach 2:
The movable housing part acts as an intermediary between the user and the heating element. When in loading position, it physically separates the heating element from the user's access area and simultaneously interrupts the electrical connection. This intermediary mechanism provides safe operation without requiring complex additional control systems or manual handling procedures.
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 solution reduces the risk of burns and electric shock by ensuring the heating element is not powered during loading or maintenance, while maintaining accurate temperature control and measurement, thus enhancing user safety and operational efficiency.
Implementation Method 1
The means for heating the sample converts electrical energy into heat
Data Source
Figure 1
Figure 2
Figure 3a~3b
AI summary
The instrument has load receiver (60) on which sample (62) is placed, when movable housing portion (22) is provided in loading position. The load receiver is surrounded by essentially closed test compartment. An electrical contact is made between stationary housing portion (21) and movable housing portion to provide electrical power to movable housing portion, in measuring position. The electrical contact between movable and stationary portions is broken, and electrical power is not provided to movable housing portion, in loading position.