Compact Mass Spectrometer with Central Vacuum and Side Circuit Boards
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Solution Overview
Problem
Conventional mass spectrometers are too large for portable use in environments requiring quick chemical contamination analysis, such as in countermeasures for terrorism or drug control, due to lack of attention to weight balance and heat exhaustion efficiency.
Innovation Solution
A compact mass spectrometer design with a centrally arranged vacuum chamber and vacuum pump, and circuit boards on both sides acting as both weight-balancing units and heat exhaust passages, optimized for easy carriage and efficient heat dissipation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If conventional mass spectrometers are designed with standard component layouts, then manufacturing is simplified, but the device becomes too large and heavy for portable use
Solution Approach 1:
The mass spectrometer is divided into multiple functional modules (ionization unit, mass analysis unit, detection unit, vacuum system, control unit) that can be independently designed and optimized. This modular segmentation allows each component to be efficiently arranged for portability while maintaining manufacturing simplicity through standardized module interfaces.
Solution Approach 2:
Components are arranged in a nested configuration where the ionization unit is positioned within or adjacent to the mass analysis unit, the detection unit is integrated with the mass analysis unit, and the vacuum system envelops these components. This nesting minimizes the overall device volume and weight while maintaining functional integrity.
2Temperature
If components are arranged to minimize piping length, then manufacturing is easier, but heat exhaustion efficiency deteriorates
Solution Approach 1:
The device employs different spatial arrangements for different functional requirements: the ionization unit, mass analysis unit, and detection unit are positioned close together to minimize sample transfer piping length, while the vacuum system and control unit are strategically positioned to create effective heat exhaustion pathways. This local optimization allows simultaneous achievement of manufacturing ease and thermal management efficiency.
3Ease of operation
If heavy components are concentrated in one location, then structural stability improves, but carriage comfort deteriorates due to poor weight balance
Solution Approach 1:
The device uses asymmetric weight distribution with the vacuum system (a heavy component) positioned at one end and the control unit (another heavy component) positioned at the opposite end, creating a balanced center of gravity. This asymmetric arrangement achieves both structural stability and carriage comfort, avoiding the instability that would result from concentrating all heavy components in one location.
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 achieves excellent heat exhaustion efficiency and weight balance, enabling a portable mass spectrometer that is easy to carry and maintain, suitable for rapid chemical analysis in various environments.
Implementation Method 1
a vacuum pump which evacuates the vacuum chamber
Implementation Method 2
electromagnetically separate the ions, thereby reliably measuring molecular weights
Data Source
AI summary
In the spectrometer, heavy loads are arranged centrally inside a case having a height smaller than a width, and having a depth smaller than the height. The heavy loads include a vacuum chamber, a vacuum pump which evacuates the vacuum chamber, a sample introduction unit which introduces a sample to be measured and evaporates the sample, an ionization unit which ionizes the evaporated sample and provides it to the vacuum chamber, and an ion detection unit which is connected to the vacuum chamber. Circuit board storage units which store a plurality of circuit boards with a predetermined space therebetween are formed on both sides along a width direction of the case.