Front–End Design Of An Ultrasonic Tomography Measurement System (original) (raw)
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Initial Study On The Implementation Of Reflection Method In Ultrasonic Tomography
Jurnal Teknologi, 2011
The main purpose of this project is to design an ultrasonic scanner system which implements the reflection method through a medical ultrasound probe. Due to the high-cost and complex configuration of some of the well-known names in medical devices; such as Philips, and Brauns, the ultrasonic scanner system in this project is aimed to be cost effective and simple. Basically, the ultrasonic scanner system consists of two parts; the transmitter and the receiver. In this project, a PIC microcontroller was used in the transmitter circuit in order to produce a 2 MHz signal to excite the 2.25 MHz ultrasonic transmitter that exists in the medical ultrasound probe that had been selected, whereas the output or the reflected signal was obtain by tapping at the receiver of the medical ultrasound probe and was observed by using a digital oscilloscope. The ultrasonic scanner system was later tested by scanning a papaya. This project was verified by obtaining the reflected signals that resulted from the papaya scanning tests.
Sistem Pendeteksi Banjir dengan Sensor Ultrasonic berbasis Mikrokontroller di kota Pangkalpinang
Transformatika, 2022
Provide convenience and information to BPBDs and people living in flood-prone environments that are usually unknown to homeowners without getting information about the arrival of floods in the area. So we need a system that can detect the water level of the river. For that, it is necessary to install a device that can read the water level in the form of an ultrasonic sensor and a microcontroller as well as a GSM SIM900A module. The research method used is literature study, problem analysis, system design and implementation.The results achieved in this study are able to help provide information in the form of sirens and SMS services in the form of short messages about flood alert levels that are sent to the community and the BPBD.
Hardware Developments of an Ultrasonic Tomography Measurement System
2011
This research provides new technique in ultrasonic tomography by using ultrasonic transceivers instead of using separate transmitter-receiver pair. The numbers of sensors or transducers used to acquire data plays an important role to generate high resolution tomography images. The configuration of these sensors is a crucial factor in the efficiency of data acquisition. Instead of using common separated transmitter-receiver, an alternative approach has been taken to use dual functionality ultrasonic transceiver. A prototype design of sensor's jig that will hold 16 transceivers of 14.1mm has been design. Transmission-mode approach with fan beam technique has been used for sensing the flow of gas, liquid and solid. This paper also explains the circuitry designs for the Ultrasonic Tomography System.
A tomography imaging system using two types of sensors
2008
iii "This project report dedicated to the memory of my late beloved grandmother and father (May Allah grant them eternal rest, Aameen), and to my affectionate mother" iv ACKNOWLEDGMENT Praise is to Allah, the Cherisher and Sustainer of the worlds. With his permission I have completed this thesis. My deep appreciation and heartfelt gratitude goes to my supervisor, Dr. Sallehuddin Bin Ibrahim for his kindness, constant endeavor, and guidance and the numerous moments of attention he devoted through out this work. I extend my deepest gratitude to Miss. Noorfaizah Binti Mohammad Rohi, Mrs. Norhalimatul Sadiah Hj Kamaruddin, Mr. Mohd Amri B Md Yunus and Mr. Mohd Daud Bin Isa who have spent a lot of their precious time to guide, advice and support me to finish this project. Special thanks goes also to the lab assistant, Abang Faiz for his help and cooperation willing to stay at night throughout the progress of this project. Family support plays a vital role in the success of any individual. I would like to convey a heartfelt thanks to my family, my brothers, my sisters, my nephews and nieces for their endless love, emotional support and belief in me. Without them I would never come up to this stage. v
Sistem Kendali dan Antarmuka pada Pembangkit Pulsa Terprogram untuk Transduser Ultrasonik
Setrum : Sistem Kendali-Tenaga-elektronika-telekomunikasi-komputer
Kontrol dan antarmuka pengguna adalah bagian penting dalam merancang diprogram pulsagenerator. Dalam tulisan ini, saya menyajikan sebuah metode untuk kontrol dan antarmuka The Pulse-Generator untuk Ultrasonic Transducer. Idenya adalah untuk mengontrol pulsa dengan Graphical User Interface (GUI) dari komputer. Tujuan dari GUI adalah untuk menghubungkan pengguna ke pulsegenerator sehingga, pengguna tidak perlu memahami tentang sistem dan kode untuk menghasilkan pulsa. Saya menggunakan mikrokontroler untuk antarmuka antara pulsa-generator dan komputer. Komunikasi antara mikrokontroler dan komputer adalah seri RX-TX sementara antara mikrokontroler dan pulsagenerator serial SPI. Pulsa-generator dapat diimplementasikan oleh Direct Digital Synthesis (DDS) perangkat yang, dasar dari DDS adalah frekuensi referensi, osilator dikontrol secara numerik dan digitalto-analog converter (DAC). Pada akhirnya, aku terintegrasi semua perangkat bersama-sama.
Electronics for Ultrasonic Imaging System
Elektronika ir Elektrotechnika, 2014
Design of ultrasonic imaging system is presented. System has a modular structure with main acquisition and front end electronics separated in order to have minimal path for host PC connectivity and shortest path to ultrasonic transducer. Such acquisition modules placement allows reducing the induced EMI and increasing the flexibility of the system. Positioning module is also separate and allows various scanning equipment configurations. Evaluation of excitation and reception electronics parameters is presented. Essential measurement procedures outlined. Signal digitization parameters (sampling frequency, clock jitter and quantisation) were chosen to balance time of flight estimation random errors versus interpolation bias errors.
Design of a System for Calibration of Ultrasonic Transducers by Immersion
This project is the result of a national need in México to have a reference standard for acoustic power and intensity in the ultrasound range, which could be used to calibrate ultrasonic equipment like transducers, reference blocks, and others; for clinical and industrial applications. The design process is initiated with the study of the IEC standard 1102 " Measurement and characterization of ultrasonic fields using hydrophones in the frequency range 0,5 MHz to 15 MHz " (18). This sets the framework for the definition of the design specifications, nevertheless the actual realization of the system had to be different due to various reasons as: the desired versatility of the system to cover a wide range of needs, minimizing cost, and the scarce availability of mechanical components in the country, that impose severe restrictions in the design and forced to try different and innovative configurations. As a result, the decision was made to construct a system adjustable to the specific needs of the country and, therefore, of the Centro Nacional de Metrología (CENAM), under these restrictions. The paper presents the previous analysis (requirements) for the design of the system, the functional specifications set for it; the design of the different components to be constructed like the positioning system with mounting parts, the water tank, support structure and the selection of other components. Finally, the complete assembly is presented with an evaluation of its capabilities and limitations of functionality.
A Review on Ultrasonic Process Tomography System
Jurnal Teknologi, 2014
The advantage of using a tomography system is that it provides visualization of component distributions inside a pipe or a process vessel. Tomography is widely used in the medical field. Due to its non-intrusive nature, tomography has caught the interest of various researchers in process applications. There is an extensive research using ultrasonic tomography for various applications. This paper is a review which expounds the principles of ultrasonic tomography systems, the hardware, and the software used in such systems.
This paper will discuss the implementations and limitations of an ultrasonic sensor. The primary goal of this sensor will be to monitor user presence by measuring the distance of an object from the sensor. Within this, the ultrasonic sensor will send a serial signal through a driver/receiver to a computer to enhance information density. This particular methodology for ultrasonic sensors will be investigated in different applications. This paper will explore primary communications between the PC and the sensor, the restrictions that ultrasonic sensors face when measuring distance, and the most commonly used applications for this particular scheme.
Choosing an Ultrasonic Sensor for Ultrasonography
2003
Ultrasonic imaging and tissue characterization is a noninvasive technique widely used in medicine for many years to assess body conditions. However, the expertise required to operate the equipment and interpret the results is not always available. The medical ultrasonography project is developing a system concept for a remotely steerable, multibeam ultrasonic scanner that can be operated by skilled medical personnel. The properly chosen ultrasonic sensor and duration of signal play an important role in ultrasonography. The choice of the ultrasonic sensor is influenced by a variety of parameters among which are: type and frequency of the signal, spectrum width of the signal, which in turn depend on the environment and object under consideration. The most frequently used signals are short sine burst, Barker code, chirp signal and Golay sequences. Each signal has its own IHDWXUHV DQG SHFXOLDULWLHV WKDW GLVWLQJXLVK LW IURP WKH RWKHUV DQG FRQVLGHUDEO\ GHWHUPLQH WKH VHQVRU¶V properties.