Aeronautical engineering: A continuing bibliography with indexes, supplement 100

This bibliography lists 295 reports, articles, and other documents introduced into the NASA Scientific and Technical Information System in August 1978

Internal in-service inspection of petrochemical storage tank floors to detect underside corrosion with Non-Destructive Testing Robot

This research develops a new robotics technology for the in-service inspection of floor plates of the majority for the world’s petrochemical storage tanks. The new robotic system aims to decrease inspection cost, reduce human inspector exposure to chemical and hazard environment during the inspection and eliminate tank outage entirely if the floor is found to contain no corrosion. The research focus is on the design and development of a Non-Destructive Testing Robot (NDTBOT) prototype that uses active buoyancy control for its locomotion mechanism and uses NDT ultrasound to measure floor plate thickness as an indication of corrosion thinning. The NDTBOT hops from one location of the floor to another location to make ultrasound thickness measurements of a tank floor, thus avoiding issues of motion on a dirty tank floor (due to oil sludge). Also, a novel radio frequency (RF) data communication system is investigated and developed that can operate while submerged in oil. This system allows control commands to be sent to the NDTBOT by an operator outside the tank and NDT data to be recovered for analysis. To evaluate the performance of the NDTBOT making thickness measurement in the tank, three types of measurement techniques were used. First, the real thickness was measured using a Vernier caliper, the second method used a standard hand-held ultrasonic thickness measurement instrument and finally the in-service inspection thickness measurements were made with the NDTBOT operating in a water tank. The NDTBOT thickness measurements with an immersion ultrasound probe obtained more accurate results than hand-held contact ultrasonic testing. Petrochemical storage tank size varies from 20 to 200 meters in diameter, rapid corrosion inspection in such tanks with a swarm of robots requires that a number of NDTBOTs be deployed inside the tank to perform the NDT. Such deployment needs coordination and control work between the robots to send the NDT data to the NDT inspector. Therefore, an investigation and experimental radio frequency wireless transmission is done in order to compare different radio frequency communication. Simulation with commercial software CADFEKO is used to perform simulation of RF wave transmission in petroleum and vegetable oil with selected radio frequencies of 200 MHz, 300 MHz, and 433 MHz. The experimental work and simulation results give confidence. The RF communication in petroleum medium is feasible for both control of NDTBOTs inside the tank and NDT data transmission back to a technician’s console placed outside the tank

Европейский и национальный контексты в научных исследованиях

В настоящем электронном сборнике «Европейский и национальный контексты в научных исследованиях. Технология» представлены работы молодых ученых по геодезии и картографии, химической технологии и машиностроению, информационным технологиям, строительству и радиотехнике. Предназначены для работников образования, науки и производства. Будут полезны студентам, магистрантам и аспирантам университетов.=In this Electronic collected materials “National and European dimension in research. Technology” works in the fields of geodesy, chemical technology, mechanical engineering, information technology, civil engineering, and radio-engineering are presented. It is intended for trainers, researchers and professionals. It can be useful for university graduate and post-graduate students

Techniques for Planning of the IoT Radio Networks in Industrial Environment

The Internet of Things (IoT) is very promising concept with a potential to bring an enormous value nearly to all aspects of human’s life: from a personal life to a production process. The IoT implies the connection and data exchange of everything to everything through the Internet by using wireless or wired communication links. Successful data transmission and the reliability of communication links will be of great importance for the IoT networks. Particularly, steady and constant connection is vital for industrial sector, where, for example, environmentally dangerous leakages of oil might be prevented by real-time or nearly real-time infrastructure condition monitoring. Within a framework of this thesis, the usage of wireless links for providing the IoT devices with a radio access to the Internet in industrial environment has been studied. Thesis work proposes methodology of the IoT radio networks planning, it describes the main milestones and matters to pay attention to during this process. Besides, thesis work proposes a novel algorithm for automatic radio network planning, that can be applied for ensuring robust and reliable wireless connection between the IoT devices and the global network

Magnetic Flux Leakage techniques for detecting corrosion of pipes

Oil and gas pipelines are subjected to corrosion due to harsh environmental conditions as in refinery and thermal power plants. Interesting problems such as internal and external corrosion, emerging from the increasing demand for pipeline protection have prompted this study. Thus, early detection of faults in pipes is essential to avoid disastrous outcomes. The research work presented in this thesis comprises investigations into the use of magnetic flux leakage (MFL) testing for pipe in extreme (underwater and high temperature) conditions. The design of a coil sensor (ferrite core with coil) with a magnetic circuit is carried out for high temperature conditions. The sensor thus developed lays the ground for non-destructive evaluation (NDE) of flaws in pipes through the MFL technique. The research focusses on the detection and characterization of MFL distribution caused by the loss of metal in ferromagnetic steel pipes. Experimental verifications are initially conducted with deeply rusted pipe samples of varying thicknesses in air. AlNiCo magnets are used along with Giant Magneto Resistance (GMR) sensor (AA002-02). The experiment is further repeated for saltwater conditions in relation to varying electrical conductivity with radio frequency identification (RFID) technique. A further study carried out in the research is the correlation between magnetic and underwater data communication. The study has resulted in the development and experimental evaluation of a coil sensor with its magnetic response at room and high temperatures. This makes the system effective under high temperature conditions where corrosion metal loss needs to be determined

Magnetic Flux Leakage techniques for detecting corrosion of pipes

Oil and gas pipelines are subjected to corrosion due to harsh environmental conditions as in refinery and thermal power plants. Interesting problems such as internal and external corrosion, emerging from the increasing demand for pipeline protection have prompted this study. Thus, early detection of faults in pipes is essential to avoid disastrous outcomes. The research work presented in this thesis comprises investigations into the use of magnetic flux leakage (MFL) testing for pipe in extreme (underwater and high temperature) conditions. The design of a coil sensor (ferrite core with coil) with a magnetic circuit is carried out for high temperature conditions. The sensor thus developed lays the ground for non-destructive evaluation (NDE) of flaws in pipes through the MFL technique. The research focusses on the detection and characterization of MFL distribution caused by the loss of metal in ferromagnetic steel pipes. Experimental verifications are initially conducted with deeply rusted pipe samples of varying thicknesses in air. AlNiCo magnets are used along with Giant Magneto Resistance (GMR) sensor (AA002-02). The experiment is further repeated for saltwater conditions in relation to varying electrical conductivity with radio frequency identification (RFID) technique. A further study carried out in the research is the correlation between magnetic and underwater data communication. The study has resulted in the development and experimental evaluation of a coil sensor with its magnetic response at room and high temperatures. This makes the system effective under high temperature conditions where corrosion metal loss needs to be determined

Aeronautical Engineering: A continuing bibliography with indexes, supplement 97

This bibliography lists 420 reports, articles, and other documents introduced into the NASA scientific and technical information system in May 1978