Mass Spectrometer Detector Diagnosis Using A/P Ratio Monitoring
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Solution Overview
Problem
Existing mass analysis devices face challenges in determining detector deterioration independently of contamination in other parts of the device, leading to potential misdiagnosis and prolonged maintenance times due to the need for complex and time-consuming detector removal and examination.
Innovation Solution
A mass analysis system that calculates an A/P ratio based on the intensity and area of electric signals from the detector, allowing for quick and accurate determination of detector performance through a combination of analog and pulse count methods, enabling independent assessment of detector deterioration without interference from contamination in other device components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the detector is removed and examined by microscope to determine deterioration, then the accuracy of detector performance determination is improved, but the time required and operational complexity increase significantly
Solution Approach 1:
The patent replaces the mechanical/optical examination method (microscope observation) with an electrical measurement method. By measuring the electrical characteristics (capacitance, resistance, or voltage) of the detector, the deterioration can be determined without physical removal or visual inspection, thus saving time and operational complexity while maintaining determination accuracy.
Solution Approach 2:
The patent introduces electrical parameters (capacitance, resistance, or voltage) as intermediary indicators to assess detector deterioration. Instead of directly observing the detector condition with a microscope, the system measures these electrical properties which change predictably with detector deterioration, providing an indirect but efficient means of evaluation.
2Reliability
If the detector is removed from the mass analysis device for examination, then the ability to determine detector deterioration is improved, but the device complexity and operational difficulty increase
Solution Approach 1:
The patent replaces the mechanical process of removing and physically examining the detector with an in-situ electrical measurement process. The measurement unit directly measures electrical characteristics of the detector while it remains installed in the mass analysis device, eliminating the need for disassembly and complex handling procedures.
Solution Approach 2:
The detector examination process becomes self-service in nature, as the measurement unit can directly assess the detector's condition through its electrical characteristics without requiring external removal or specialized examination equipment. The system performs its own diagnostic function using the detector's inherent electrical properties.
3Ease of operation
If only measurement intensity is monitored to detect detector deterioration, then the simplicity of monitoring is maintained, but the accuracy of determining whether the detector has deteriorated decreases due to potential contamination of other device parts
Solution Approach 1:
The patent introduces electrical parameters (capacitance, resistance, or voltage) as intermediary indicators that are specific to the detector's condition. These parameters serve as mediators between the detector's physical state and the measurement system, allowing differentiation between detector deterioration and contamination of other parts, thus improving determination accuracy while maintaining monitoring simplicity.
Solution Approach 2:
The patent measures local electrical characteristics (capacitance, resistance, or voltage) specifically at the detector location rather than monitoring overall system performance. This localized measurement approach isolates the detector's condition from other parts of the device, enabling accurate determination of detector deterioration independent of contamination elsewhere in the system.
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
Enables accurate and rapid assessment of detector performance, reducing maintenance time and avoiding misdiagnosis by monitoring the A/P ratio, which remains constant regardless of contamination in other parts of the device.
Implementation Method 1
The electron multiplier tube causes charged particles to collide with a first dynode and converts the charged particles into electrons, the photoelectron multiplier tube causes photons to collide with the first dynode and converts the photons into electrons, and the generated electrons are amplified by the subsequent dynode
Implementation Method 2
The scintillator is a generic term for substances that emit fluorescence when particles collide with one another
Implementation Method 3
substances that emit fluorescence when particles collide with one another
Data Source
AI summary
Provided is a technique for accurately determining a performance of a single detector that detects ions having passed through a mass analysis unit. A mass analysis system according to the present disclosure includes, in a mass analysis device, a first converter configured to calculate a first measured value based on an intensity and an area of a pulse in an electric signal output from the detector configured to detect the ions having passed through the mass analysis unit, a second converter configured to obtain a second measured value by counting the number of pulses of the electric signal, a calculation unit configured to calculate an A/P ratio indicating a ratio of the first measured value to the second measured value, a determination unit configured to determine a performance of the detector based on a value of the A/P ratio, and a control unit configured to control at least an output of a determination result obtained by the determination unit.