Gravimetric Measuring System Thermal Management
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Solution Overview
Problem
Gravimetric measuring systems face disruptions in temperature distribution and weighing accuracy when functional modules are changed, due to varying heat outputs from active modules, which can alter the thermal balance within the weighing chamber.
Innovation Solution
The integration of device-side thermal interface components in module receptacles, which are thermally connected to a central cooling apparatus, with module-side thermal interface components that adapt in size to match the heat output of each functional module, ensuring balanced cooling and precise temperature control through a programmable control apparatus.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If functional modules are changed in the weighing chamber, then the adaptability of the measuring system is improved, but the temperature distribution stability deteriorates due to varying heat outputs
Solution Approach 1:
The cooling apparatus dynamically adapts its cooling capacity based on the configured functional modules. The control apparatus calculates the total heat output of installed modules and adjusts the cooling apparatus operation accordingly, allowing the system to maintain temperature stability despite changes in module configuration
Solution Approach 2:
The system changes the operating parameters of the cooling apparatus (cooling capacity, power consumption) based on the heat output parameters of the installed functional modules. This parameter adaptation ensures that the cooling performance matches the actual thermal load from different module configurations
2Measurement precision
If a cooling apparatus is added to compensate for heat output, then the temperature control precision is improved, but the device complexity increases
Solution Approach 1:
The cooling apparatus serves multiple functions: it cools the weighing chamber to maintain temperature stability, compensates for heat from different functional module configurations, and works integrated with the control apparatus that already manages the weighing system. This multi-functionality approach adds cooling capability without proportionally increasing overall system complexity
Solution Approach 2:
The control apparatus uses feedback from temperature sensors and module configuration data to automatically adjust the cooling apparatus operation. This closed-loop control maintains temperature stability while avoiding manual intervention, reducing operational complexity despite the added cooling system
3Adaptability or versatility
If thermal interface components are integrated into module receptacles, then the temperature control adaptability is improved, but the manufacturing complexity increases
Solution Approach 1:
The thermal management system is segmented into modular components: device-side thermal interface components integrated into the weighing chamber, module-side thermal interface components on functional modules, and a central cooling apparatus. This segmentation allows independent manufacturing and assembly of each component, reducing overall manufacturing complexity while maintaining thermal management flexibility
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
This solution maintains a stable temperature distribution in the weighing chamber, minimizing disruptions and ensuring accurate weighing operations by automatically adjusting cooling capacity based on the type and number of installed modules, providing flexible and precise thermal management.
Implementation Method 1
device-side thermal interface components (32a), which are thermally connected to the cooling apparatus (34)
Implementation Method 2
cooling apparatus (34), for cooling the weighing chamber (22)
Data Source
AI summary
A gravimetric measuring system (10) includes a balance (12) with a weighing chamber (22) surrounded by a weighing chamber wall (23, 24, 26, 28); an electromechanical weighing system (181) arranged in a weighing system chamber (18); an electronic control apparatus (36) for controlling the system operation; a cooling apparatus (34), controllable by the control apparatus, for cooling the weighing chamber (22); and a plurality of functional modules (14, 16) that generate heat during operation and are insertable into module receptacles (283) arranged on the weighing chamber wall (28). The module receptacles (283) have device-side thermal interface components (32a) that are thermally connected to the cooling apparatus (34), and the functional modules (14, 16) have corresponding module-side thermal interface components (32b) that, in an inserted state of the respective functional module (14, 16), thermally contact the device-side thermal interface component (32a) of the respectively associated module receptacle (283).