Modular Photoacoustic Cell Assembly for Fast Sensor Replacement
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Solution Overview
Problem
Existing photoacoustic detecting devices are designed as monolithic blocks, requiring the entire device to be replaced when components like the photoacoustic cell or transducer need to be changed or when different parameters are to be measured, which is inefficient and costly.
Innovation Solution
A modular photoacoustic detecting device with a housing that allows the photoacoustic cell and transducer to be easily removed and replaced through accessible fixing elements, using a first maintaining element for the light source and guiding structure and a second maintaining element for the transducer, with a connecting element ensuring mechanical, electronic, and electrical connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the photoacoustic detecting device is designed as a monolithic block, then the structural integrity and stability are improved, but the ease of repair and adaptability deteriorate because the entire device must be replaced when components need to be changed
Solution Approach 1:
The photoacoustic detecting device is divided into modular components including a light source module, photoacoustic cell, transducer, and housing that can be independently replaced. The light source is mounted on a circuit board that can be detached, the photoacoustic cell has removable fixing elements, and the transducer is coupled to the housing with accessible mounting structures, enabling segment-by-segment replacement rather than whole-device replacement
2Ease of manufacture
If the photoacoustic detecting device is designed as a monolithic block, then the manufacturing simplicity is improved, but the adaptability deteriorates because different measurement parameters require complete device replacement
Solution Approach 1:
The device is segmented into functional modules that can be independently configured. The light source can be replaced with different wavelengths, the photoacoustic cell can be changed for different medium types, and the transducer can be swapped for different detection requirements, all while maintaining a standardized housing and mounting interface that preserves manufacturing simplicity
Solution Approach 2:
The housing and mounting structures are designed with universal interfaces that accommodate different light sources, photoacoustic cells, and transducers. The fixing elements, guiding structure, and electrical connections are standardized to work with multiple component types, enabling a single housing design to support multiple measurement configurations
3Measurement precision
If the photoacoustic cell and transducer are firmly integrated into the housing, then the measurement precision and stability are improved, but the ease of operation deteriorates because component access requires complete device disassembly
Solution Approach 1:
The photoacoustic cell is segmented from the housing with independent fixing elements that can be accessed through openings in the housing. The transducer is mounted on the housing with accessible mounting structures, allowing both components to be replaced without disassembling the entire device while maintaining their precise relative positions during operation
4Stability of the object's composition
If the entire device must be replaced when components fail, then the structural stability is maintained, but the loss of time and productivity deteriorate due to complete device replacement requirements
Solution Approach 1:
The device is segmented into replaceable modules including the light source on its circuit board, the photoacoustic cell with independent fixing, and the transducer with accessible mounting. This allows failure components to be replaced in minutes rather than requiring complete device replacement, reducing downtime while maintaining structural stability through standardized interfaces
Solution Approach 2:
Individual components such as the light source, photoacoustic cell, or transducer can be discarded when failed and replaced with new or refurbished units. The housing and supporting structures are recovered and reused, reducing waste and replacement time compared to discarding the entire device
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
Facilitates easy dismantling and replacement of the photoacoustic cell and transducer without needing to dismantle the entire device, reducing maintenance costs and improving flexibility for different parameter measurements.
Implementation Method 1
The photoacoustic detection is based on the detection of a pressure wave associated with a thermic wave. The thermic wave is generated under the effect of the absorption of the light beam by the medium. Such absorption creates a local heating of chemical components in the medium
Implementation Method 2
The photoacoustic detection is based on the detection of a pressure wave associated with a thermic wave. When the thermic wave comes out of the medium, after its propagation, a pressure wave is generated, which can be detected
Data Source
AI summary
A photoacoustic detecting device for measuring a parameter of interest in a medium comprising a housing comprising a baseplate and a cover, a photoacoustic cell with a contact surface in contact with the medium, a the light signal propagating from a guiding element, in the photoacoustic cell and reaching the medium, a first maintaining element assembling the light source and a guiding element in a building block, the photoacoustic cell being reversibly attached to the building block by a fixing element, the photoacoustic cell being able to be removed from the housing by passing through an aperture of the baseplate when needed.