Design and Construction of Medical Devices/Practical Exercises
| Code | Completion | Credits | Range | Language |
|---|---|---|---|---|
| F7PBBPNK | KZ | 4 | 4L | Czech |
- Relations:
- In order to register for the course F7PBBPNK, the student must have successfully completed the course F7PBBEO in a previous semester.
- In order to register for the course F7PBBPNK, the student must have successfully completed the course F7PBBEM in a previous semester.
- In order to register for the course F7PBBPNK, the student must have successfully completed the course F7PBBSM in a previous semester.
- Course guarantor:
- Roman Matějka
- Lecturer:
- Roman Matějka, Jana Matějková
- Tutor:
- Roman Matějka, Jana Matějková
- Supervisor:
- Department of Biomedical Technology
- Synopsis:
-
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.
- Requirements:
-
The content of the subject follows on from the previous subjects F7ABBEO - Electronic Circuits, F7ABBEM - Electrical Measurements and F7ABBSM - Sensors in Medicine and requires knowledge from these topics, involving:
One unexcused absence is allowed.
Schematic orientation and knowledge of calculations in the circuit - passive components (resistive/voltage divider, RC, RL and RLC circuits, Wheatstone bridge), active components (diodes and Zener diodes), operational amplifiers (connection as a follower, inverting and non-inverting amplifier, differential amplifier and instrument amplifier). Fundamental knowledge about electronical transducers with deeper focus on resistive ones, including temperature sensors. Basic knowledge of working with laboratory instruments - digital multimeter (measuring parameters U, I, R), laboratory source (setting voltage and current limit), oscilloscope (manual setting of parameters - range, time base, triggering) and signal generator.
The course ends with a graded credit. Three continuous tests during the semester (7th week, 12th week and last during exam period, will be specified in advance), focusing on the material covered, test composition: numerical example with the need to read parameters from the component catalog sheet, design of a wiring diagram with a selection of components from and theoretical question. Evaluation of individual parts: 10 points numerical example, 10 points creation of a scheme and 10 points theoretical question, a total of 30 points for a test.
Topics of the tests:
The first test: passive components (resistive/voltage divider, RC, RL, and RLC circuits, Wheatstone bridge), active components (diodes and Zener diodes) - also all calculations (e.g., voltage divider, resistance, capacitance, inductance, etc.) and also and making circuits from these components. Basics of practical electronics - marking of components, components package, soldering.
The second test: the content of the first test + operational amplifiers - theoretical knowledge and calculation + making circuit with OA.
The third test: The content of previous tests + comparators - theoretical knowledge and calculation + making circuit with comparator
Practical knowledge - creating a schematic and printed circuit board (PCB) in Fusion 360 - is also assessed. The functionality and appearance of the schematic and board will be assessed, the maximum number of points is 35. Students work individually, for assessment they will submit PDF drawings to the instructor: 1) schematic, 2) component fitting sheet, 3) copper layer drawing of the board.
The final evaluation is given by the sum of points from individual tests, practical knowledge and possible bonus points. No correction date will be implemented due to the fact that it is possible to obtain up to a total of 125 points from tests. The point minimum is 50 points from the tests and practical knowledge, extra points are not included to pass the class, 50 point are mark E, other grades according to CTU classification scheme.
- Syllabus of lectures:
-
Course has no lectures.
- Syllabus of tutorials:
-
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.
- Study Objective:
-
Orientation in technical documentation (data and sheets, application recommendations); design of electrical documentation in the EAGLE environment (electronic diagram and printed circuit board); PCB production; soft soldering of THT and SMT components; safe ESD work; implementation of a simple application for signal digitization based on NI-DAQ and Arduino in the LabVIEW environment and data export; service intervention in the device (analysis of functional blocks, safety during handling, measurement at test points)
- Study materials:
-
[1] Medical instrumentation: application and design. 4th ed. Editor John G. WEBSTER. Hoboken, N.J.: Wiley, c2010. ISBN 9780471676003.
- Note:
- Time-table for winter semester 2024/2025:
-
06:00–08:0008:00–10:0010:00–12:0012:00–14:0014:00–16:0016:00–18:0018:00–20:0020:00–22:0022:00–24:00
Mon Tue Wed Thu Fri - Time-table for summer semester 2024/2025:
- Time-table is not available yet
- The course is a part of the following study plans:
-
- Biomedical Technology (compulsory course)
- Biomedical Technology (compulsory course)