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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.


Microcontroller output signals in 4-projection mode (8 pulses).
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f23-sensors-08-03406: Microcontroller output signals in 4-projection mode (8 pulses).

Mentions: Basically, the microcontroller remains in idle state (‘0’ state) until the PC sends a signal to request the DAS to start acquire data (‘1’ state). When the microcontroller is activated by the input signal, it will produce signals according to the programmed pulses. The PIC16F84A is programmed for two different modes for both the 2-projection mode and the 4-projection mode. In the 2-projection mode, the decoder requires 16 pulses to operate while the 4-projection mode needs only 8 pulses to function as shown in Figure 22 and Figure 23.


Hardware Implementation of Multiple Fan Beam Projection Technique in Optical Fibre Process Tomography
Microcontroller output signals in 4-projection mode (8 pulses).
© Copyright Policy
Related In: Results  -  Collection

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

f23-sensors-08-03406: Microcontroller output signals in 4-projection mode (8 pulses).
Mentions: Basically, the microcontroller remains in idle state (‘0’ state) until the PC sends a signal to request the DAS to start acquire data (‘1’ state). When the microcontroller is activated by the input signal, it will produce signals according to the programmed pulses. The PIC16F84A is programmed for two different modes for both the 2-projection mode and the 4-projection mode. In the 2-projection mode, the decoder requires 16 pulses to operate while the 4-projection mode needs only 8 pulses to function as shown in Figure 22 and Figure 23.

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.