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Hardware Implementation of Multiple Fan Beam Projection Technique in Optical Fibre Process Tomography

View Article: PubMed Central

ABSTRACT

The main objective of this project is to implement the multiple fan beam projection technique using optical fibre sensors with the aim to achieve a high data acquisition rate. Multiple fan beam projection technique here is defined as allowing more than one emitter to transmit light at the same time using the switch-mode fan beam method. For the thirty-two pairs of sensors used, the 2-projection technique and 4-projection technique are being investigated. Sixteen sets of projections will complete one frame of light emission for the 2-projection technique while eight sets of projection will complete one frame of light emission for the 4-projection technique. In order to facilitate data acquisition process, PIC microcontroller and the sample and hold circuit are being used. This paper summarizes the hardware configuration and design for this project.

No MeSH data available.


Coupling between sensor and fibre optic.
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f6-sensors-08-03406: Coupling between sensor and fibre optic.

Mentions: Signal loss due to improper coupling between sensors and fibre optics can cause inaccurate data acquisition. In order to avoid transmission loss when the fibre optics is coupled with the infrared emitters and photodiodes, custom-made housing is being used. The housing is made of PVC and designed as such to hold both the infrared emitters and photodiodes with fibre optics to make sure that the connection area is small and the lights can be directed straight, either from the emitters to the fibre optics or light from the fibre optics to the receivers. Figure 6 shows the coupling between the sensor and fibre optic while figure 7 shows the actual photographs of the fibre optic housing and its coupling with the sensor and fibre optic.


Hardware Implementation of Multiple Fan Beam Projection Technique in Optical Fibre Process Tomography
Coupling between sensor and fibre optic.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3675551&req=5

f6-sensors-08-03406: Coupling between sensor and fibre optic.
Mentions: Signal loss due to improper coupling between sensors and fibre optics can cause inaccurate data acquisition. In order to avoid transmission loss when the fibre optics is coupled with the infrared emitters and photodiodes, custom-made housing is being used. The housing is made of PVC and designed as such to hold both the infrared emitters and photodiodes with fibre optics to make sure that the connection area is small and the lights can be directed straight, either from the emitters to the fibre optics or light from the fibre optics to the receivers. Figure 6 shows the coupling between the sensor and fibre optic while figure 7 shows the actual photographs of the fibre optic housing and its coupling with the sensor and fibre optic.

View Article: PubMed Central

ABSTRACT

The main objective of this project is to implement the multiple fan beam projection technique using optical fibre sensors with the aim to achieve a high data acquisition rate. Multiple fan beam projection technique here is defined as allowing more than one emitter to transmit light at the same time using the switch-mode fan beam method. For the thirty-two pairs of sensors used, the 2-projection technique and 4-projection technique are being investigated. Sixteen sets of projections will complete one frame of light emission for the 2-projection technique while eight sets of projection will complete one frame of light emission for the 4-projection technique. In order to facilitate data acquisition process, PIC microcontroller and the sample and hold circuit are being used. This paper summarizes the hardware configuration and design for this project.

No MeSH data available.