Sensing of components in liquids
First Claim
1. A sensing system for sensing a component in a liquid, the system comprising:
- a microfluidic diffusion channel, the microfluidic diffusion channel comprising an open end and a closed end, the microfluidic channel providing a diffusion path for the component in the liquid to be sensed,at least one measurement sensor positioned at the open end, the measurement sensor being arranged for detecting a measurement signal indicating a characteristic of a portion of the component at the open end of the diffusion channel,at least one reference sensor positioned in the microfluidic diffusion channel adjacent the closed end, the reference sensor being arranged for detecting a reference signal of the liquid, the diffusion channel and reference sensor being arranged such that the reference signal indicates a characteristic of a portion of the component arriving at the reference sensor by diffusion through the diffusion channel,the system being configured for combining the measurement signal and the reference signal so as to filter out background influences.
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Abstract
A sensing system and method for sensing a component in a liquid is disclosed. The system comprises a microfluidic channel, the microfluidic channel comprising a first end and a second end, wherein the microfluidic channel is open at the first end and closed at the second end. The system also comprises at least one measurement sensor positioned adjacent the first end, the measurement sensor being arranged for detecting a measurement signal and a reference sensor positioned in the microfluidic channel adjacent the second end, the reference sensor being arranged for detecting a reference signal of the liquid. The system further is configured for combining the measurement signal and the reference signal so as to filter out background influences.
10 Citations
20 Claims
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1. A sensing system for sensing a component in a liquid, the system comprising:
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a microfluidic diffusion channel, the microfluidic diffusion channel comprising an open end and a closed end, the microfluidic channel providing a diffusion path for the component in the liquid to be sensed, at least one measurement sensor positioned at the open end, the measurement sensor being arranged for detecting a measurement signal indicating a characteristic of a portion of the component at the open end of the diffusion channel, at least one reference sensor positioned in the microfluidic diffusion channel adjacent the closed end, the reference sensor being arranged for detecting a reference signal of the liquid, the diffusion channel and reference sensor being arranged such that the reference signal indicates a characteristic of a portion of the component arriving at the reference sensor by diffusion through the diffusion channel, the system being configured for combining the measurement signal and the reference signal so as to filter out background influences. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A method for sensing a component in a liquid, the method comprising:
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obtaining a measurement signal of a fluid to be characterized using a measurement sensor positioned at an open end of a microfluidic diffusion channel, the measurement signal indicating a characteristic of a portion of the component at the open end of the diffusion channel, obtaining a reference signal for the fluid to be characterized using a reference sensor positioned adjacent a closed end of the microfluidic diffusion channel, the microfluidic diffusion channel providing a diffusion path for the component in the liquid to be sensed, the diffusion channel and reference sensor being arranged such that the reference signal indicates a characteristic of a portion of the component arriving at the closed end by diffusion through the diffusion channel, and compensating the measurement signal with the reference signal so as to filter out background influences.
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Specification