Cesium Optical Pump Detector for Buried Chemical Weapons
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Solution Overview
Problem
Conventional detectors are inadequate for detecting buried and abandoned chemical weapons due to their corroded state, which affects the accuracy and reliability of existing detection methods.
Innovation Solution
A cesium optical pump detector is developed, comprising a pumping light generation module, optical modules, a magnetic resonance module, a photoelectric detection module, and a signal processing module, which generates and processes near-infrared signals to accurately identify buried chemical weapons by measuring the magnetic field intensity using a combination of circularly polarized light and radiofrequency electromagnetic fields.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional detectors are used for detecting buried and abandoned chemical weapons, then the detection process is simple, but the detection accuracy is insufficient due to the corroded state of the chemical weapons
Solution Approach 1:
The detector is divided into multiple functional modules: pumping light generation module, first optical module, magnetic resonance module, photoelectric detection module, and signal processing module. Each module performs a specific function in the detection process, allowing for optimized design of each component while maintaining overall system accuracy for detecting corroded chemical weapons.
Solution Approach 2:
The detector utilizes changes in magnetic field parameters and optical properties to detect the corroded state of chemical weapons. By measuring variations in these physical parameters, the system can identify subtle changes in the chemical weapons' condition despite their corroded state, thereby improving detection accuracy.
2Measurement precision
If frequency measurement is performed with high precision, then the detection accuracy of buried chemical weapons is improved, but the time required for measurement increases
Solution Approach 1:
The frequency measurement process is segmented into two stages: coarse measurement using a first band-pass filter followed by fine measurement using a second band-pass filter. This segmented approach allows the system to quickly narrow down the frequency range initially, then focus computational resources on precise measurement within the narrowed range, thereby reducing total measurement time while maintaining high precision.
Solution Approach 2:
The coarse measurement stage performs preliminary frequency range identification before the fine measurement stage begins. This preliminary action eliminates the need for the fine measurement system to search through the entire frequency spectrum, significantly reducing the time required for high-precision frequency measurement.
3Measurement precision
If a single band-pass filter is used for frequency measurement, then the device structure is simple, but the frequency measurement range is limited and precision is insufficient
Solution Approach 1:
The filter system is segmented into a first band-pass filter for coarse frequency measurement and a second band-pass filter for fine frequency measurement. Each filter is optimized for its specific measurement stage, allowing the system to achieve high frequency measurement precision while keeping each individual filter relatively simple in design.
Solution Approach 2:
The filter system operates dynamically by switching between the first and second band-pass filters based on the measurement stage. The system adapts its filtering characteristics to match the requirements of each measurement phase, enabling precise frequency measurement across a wide range while maintaining manageable device complexity.
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 cesium optical pump detector provides high detection accuracy and efficiency for buried and abandoned chemical weapons by coarsely and finely measuring the frequency of electrical signals, enhancing the detection of buried chemical weapons and improving the reliability of the detection process.
Implementation Method 1
a pumping light generation module configured to generate a near-infrared light
Implementation Method 2
a first optical module configured to receive the near-infrared light and convert the near-infrared light into a circularly polarized light
Implementation Method 3
a magnetic resonance module including a radiofrequency coil configured to generate a radiofrequency electromagnetic field
Implementation Method 4
an absorption chamber including an elemental cesium, configured to generate a modulated near-infrared signal based upon an interaction of the circularly polarized light, the radiofrequency electromagnetic field, and a magnetic field detected
Implementation Method 5
a photoelectric detection module configured to receive the modulated near-infrared signal and convert the modulated near-infrared signal into an electrical signal
Data Source
AI summary
A cesium optical pump detector for buried and abandoned chemical weapons of Japan is provided, comprising a pumping light generation module, a first optical module, a magnetic resonance module, a photoelectric detection module, and a signal processing module. The signal processing module includes an amplifying and filtering unit, a self-oscillation unit, a measuring unit, and a calculating unit connected in sequence. The amplifying and filtering unit comprises a first band-pass filter configured to coarsely measure a frequency of the electrical signal and a second band-pass filter configured to finely measure the frequency of the electrical signal. The self-oscillation unit comprises a first phase shifter connected to the first band-pass filter and a second phase shifter connected to the second band-pass filter. In the present disclosure, the intensity of a magnetic field detected can be finely measured, so that the ACWs can be found efficiently and accurately.