Concentration measurements of bubbles in a water column using an optical tomography system

Non-invasive process tomography in chemical mixtures – A review

“…X-ray tomography system with different tube sizes as gas phantom [7]. of the liquid-gas phase flow was introduced by using a hybrid back projection algorithm in [17]. Fig.…”

A Review on Applications of Optical Tomography in Industrial Process

“…The emitters can be Light Emitting Diode (LED), halogen bulb, laser, or infrared while the receivers or detectors can be photodiode, phototransistor, or photomultipliers [9]. Optical sensor has become the popular choice in the industry due to cheap prices of optical transducers, relatively straightforward and simple operation as compared to the other sensors such as capacitance sensors [10]. Moreover, optical sensors are capable of measuring the high-speed flowing particles since it can provide fast response time [11].…”

“…His research had used optical fiber as the medium to transmit the light from halogen bulb to photodiode as receiver. Few years later, Ibrahim [10] measured the gas bubbles in vertical water column by using optical tomography. He had constructed the image of gas bubbles by using hybrid reconstruction algorithm where the experiment setup is illustrated in figure 14 which consists of pipe, bubbles outlet, pump and pressure meter.…”

“…STS correlation is different from PTP correlation where the data from upstream sensor is correlated with downstream sensor instead of using pixels values [41]. The method is better than PTP correlation method since STS required only 2 × N times for N × N orthogonal sensor pairs for the number of cross correlation [42].The correlation techniques in [18], [30], [37] and [39] were used to measure the velocity of plastic beads flows in flow rigs while Ibrahim [10] measured the velocity of gas bubbles in a vertical column. Pang [30] has applied the data distribution system which consists of two personal computers (PC) in order to upgrade the speed of data processing time.…”

Comparison Between Two Different Types of Microcontroller in Developing Optical Tomography Controller Unit

“…granular flow or liquid and gas (e.g. water in bubble column) [2]. Indeed, there are several other tomography techniques available but optical tomography is considered safest technique since this sensors is equally sensitive to parameter measured in all position throughout the measurement volume and its sensitivity is independent on the distribution inside and outside measurement region [3].…”