Code: F7ABBPNK Design and Construction of Medical Devices/Practical Exercises
Lecturer: doc. Ing. Roman Matějka Ph.D. Weekly load: 4L Completion: GA
Department: 17110 Credits: 4 Semester: W
Description:
The aim of the practically oriented course is to acquaint students with the design process of the measuring part of the device, ie basic problem analysis, determination of functional blocks and their design, selection of suitable components and their values ??with emphasis on working with catalog sheets and application recommendations, preparation of electrical documentation and board design. printed circuit board, its mounting, soldering and revitalization. During the course, students will implement a functional device (mounting, soldering, recovery) electronic thermometer, which will consist of two functional units - analog part for temperature measurement and signal conditioning (equipped with THT components) and display element with diode bargraph (equipped with SMT components ). For both products, students will implement the design of the diagram and PCB in the CAD environment EAGLE. In addition to the analog part of the device, an application for digitizing data from the analog device using NI-DAQ cards and a cheap solution with the help of Arduino will be implemented. The last part will be a service intervention in the device (monitor of vital functions) with emphasis on safe handling and measurement of test points.
Contents:
Course has no lectures.
Seminar contents:
Exercises take the form of 4 hour blocks
1. Problem analysis (electronic thermometer with NTC), design of functional block connections (connection of resistive thermometer to divider and bridge, power supply and voltage reference, amplification), choice of components based on calculation and availability from the series, work with catalog sheet
2. Verification of the proposed connection (electronic thermometer with NTC) and its stability in a non-soldering field.
3. Schematic design in EAGLE environment, choice of components and packages, circuit simulation in Multisim environment (SPICE).
4. PCB design in EAGLE environment, methods of manual component layout, autorouting and manual path guidance, export for production.
5. PCB production by photo path, PCB mounting and soldering of THT components - thermometer board with NTC
6. Revitalization of the produced board, measurement at nodal points, fault finding, measurement of transmission characteristics.
7. Manual soldering of SMT components, application of solder paste through the mask, mounting and remelting, optical analysis of soldering - imaging element board to the thermometer.
8. Recovery and testing of the activated set (thermometer board and display element board), use of the system for automated tests TestStand in combination with a data card for verification of operation in different conditions and stress test (simulation of different temperatures, different battery voltages)
9. Creation of a measuring application in the LabVIEW environment for digitization of data from a manufactured jig using an NI-DAQ industrial converter.
10. Digitization using available solutions (Arduino) and data display in the terminal and LabVIEW
11. Connection of instrument amplifier for sensing biopotentials - ECG, EMG and EOG, data digitization
12. Signal amplification from electrochemical sensors - pH and conductivity, temperature compensation, detection of maximum peaks.
13. Service intervention in the monitor of vital functions, safety during handling and use of isolating transformer, analysis of function blocks, measurements on test nodes for setting operating values, assembly of the device and verification of operation
14. Consultation of the subject, reserve for additional assessment of tasks, graded credit.
Recommended literature:
[1] Medical instrumentation: application and design. 4th ed. Editor John G. WEBSTER. Hoboken, N.J.: Wiley, c2010. ISBN 9780471676003.

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