Telemetry System for Experimental Study of Ultrasonic Measurement on COVID-19 Situation Wongsakorn Wongsaroj Department of Mechanical Engineering Tokyo Institute of Technology Tokyo, Japan wongsaroj.w.aa@m.titech.ac.jp Naruki Shoji Department of Mechanical Engineering Tokyo Institute of Technology Tokyo, Japan shoji.n.aa@m.titech.ac.jp Hiroshige Kikura Laboratory for Advanced Nuclear Energy, Institute of Innovative Research Tokyo Institute of Technology Tokyo, Japan kikura@lane.iir.titech.ac.jp Hideharu Takahashi Laboratory for Advanced Nuclear Energy, Institute of Innovative Research Tokyo Institute of Technology Tokyo, Japan htakahashi@lane.iir.titech.ac.jp work remotely from other places outside the work place has been considered. The internet of thing (IoT) [4] is a system of interrelated computing devices, mechanical and digital machines provided with unique identifiers (UIDs). It has the ability to transfer data over a network without requiring human-to-human or human-to-computer interaction. As this technology, it opens the opportunity for remoted operation, automation and telemetry system in several sectors such as industrial [5], medication [6] or even in for smart home [7]. Therefore, this platform has a potential significantly to apply for the execution of experimental work remotely under pandemic disease circumstance as the COVID-19. This study presents the telemetry concept to hand on the experimental activity remotely. The experiment can be conducted anywhere at the internet is available. The demonstration is focused on the experiment of the velocity distribution measurement in the bubbly flow. It is the one of important parameter of fluid mechanic investigation. The investigation is conducted by employing the ultrasonic velocity profiler measurement system. II. MEASUREMENT DEVCE AND TELEMETRY SYSTEM A. Ultrasonic velocity profiler The UVP measurement [8] is an ultrasound-reflection technique which can obtain the velocity profile of the liquid. Figure 1 illustrates the UVP configuration, ultrasonic pulse- echo and velocity profile reconstruction. An ultrasonic pulse is transmitted from the transducer along the measurement line to the liquid. The echo signal reflected from moving reflector such as small particle dispersed in the liquid is derived by the same transducer. As the ultrasonic wave is emitted repeatedly, the echo signals are obtained sequentially. Doppler signal influenced by the velocity of a moving particle can be de- modulated from the echo signals. The Doppler frequency fD(i) directly relates to the velocity of the particle (i) is position or channel). Hence, the velocity of the particle at that position V(i) can be computed as θ sin 2 ) ( ) ( 0 f i cf i V D = (1) Abstract—As the COVID-19 situation, the social gathering and working activity is limited. The research activities and engineering work has been affected strongly especially the experimental work. In this paper, the telemetry system concept is proposed for conducting the experiment remotely outside the laboratory. The power source of the experimental equipment is controlled remotely. The experimental execution is observed by the camera exposing the user to monitor the real time conducting from the outside. The experiment of velocity profile measurement on the bubbly flow which is the importance task in the fluid engineering was demonstrated to confirm the applicability of the concept. Finally, the experimental result can be obtained successfully under the remoted experiment. Keywords—Telemetry, COVID-19, Experiment, Ultrasonic, I. INTRODUCTION Nowadays, among the high demand of the electrical energy consumption in the world. The power plant is established to respond this requirement. The one of electrical power generation is based on the utilizing of steam power. This concept is placed on coal, gas combine cycle and nuclear power plant. However, these power plants must be operated safely without of the accident. The operation is imperative to under the safety aspect. The crucial part of the plant operation according to safety standard and sustainability is the engineering design. The thermal hydraulic and fluid mechanic behaviors of the water-steam cycle in the boiling unit of steam generation is the main section on the occurring of the accident. It is compulsory to be predicted and optimized accurately by the numerical model [1, 2]. These behaviors directly determine the geometry, material and other specification which affects the safety criteria of the unit. To confirm reliability of the model, Indispensably, the model validation by the experimental data is the important task. Hence, experimental investigation on this behavior is needed [3]. Presently, due to the COVID-19 situation, the social gathering and working activity in the work place have been prohibited or at least is minimized. Significantly, it influences to the activity on the experimental task in the facility placed on the laboratory or company. As the consequence, the completion of experiment work is delay. Then, the engineering design and project execution as well is belated. Hence, to solve this problem, the conducting of experimental © IEEE 2020. This article is free to access and download, along with rights for full text and data mining, re-use and analysis