Engineering Design Approach for an Optimized Analog Electronic Stethoscope
Auscultation is a substantial skill in the medical screening and diagnosis procedure since it may lead to differentiating normal and/or abnormal sounds from the respiratory, cardiac, and digestive systems. Howsoever, lack of expertise in auscultation skills is a barrier faced by many semi-trained healthcare personnel and furthermore, the constraints of external noises and weaker body signals cause to manipulate the diagnosis procedure more difficult. Audio amplification in electronic stethoscopes provides a better alternative for conventional stethoscopes by mitigating the above obstacles. In this semester project, the engineering design approach for a fully analog electronic stethoscope is presented with the design innovation, logical reasoning cycle, and simulations. The project review presentation was presented on 20th August 2020.
Recommended
More Related Content
Similar to Engineering Design Approach for an Optimized Analog Electronic Stethoscope
Similar to Engineering Design Approach for an Optimized Analog Electronic Stethoscope (20)
More from Nuwan Sriyantha Bandara
More from Nuwan Sriyantha Bandara (10)
Recently uploaded
Recently uploaded (20)
Engineering Design Approach for an Optimized Analog Electronic Stethoscope
- 1. MID-REVIEW Electronic Stethoscope EN2090: Group 28 Department of Electronic & Telecommunication Engineering University of Moratuwa P.M.N.S. Bandara S.M. Chandanayake S.S. Hettiarachchi W.M.H.M. Wasala 10th August 2020
- 2. Introduction ⚫ Medical diagnosis process and Auscultation ⚫ Detecting normal and/or abnormal respiratory, cardiac, arterial, fetal, venous, intestinal and uterine sounds of humans ⚫ The need for substantial clinical experiences and better listening skills of medical practitioners ⚫ Constraints of External Noises and Weaker body signals in diagnosis ⚫ Solution of Electronic Amplification via, “Electronic Stethoscope”
- 5. ● Using Fast Fourier Transform and Power Spectral Density Frequency Analysis of Heart Sounds A Normal Heart Sound
- 6. An Abnormal Heart Sound
- 7. Basic Sensor Stage Pre-Amplifier ⚫ Available Options: ⚪ TL072 Op-Amp ⚪ LM358 Op-Amp ⚪ LMP770X Op-Amp ⚫ Concluded Option: LM358AD Logical Reasoning: Electronic Circuit Design
- 8. Low-Pass Filter Power Amplifier ⚫ Available Options: ⚪ LM358 Op-Amp ⚪ LM386 Op-Amp ⚫ Maximum Power Transfer Theorem and Impedance Mismatch with ECM ⚫ Concluded Option: ⚪ LM386 Op-Amp Logical Reasoning: Electronic Circuit Design
- 9. Power Supply Voltage Reference ⚫ Single-Supply Circuit ⚫ Along with Buck Converter ⚫ Purpose of Precision ⚫ LMP7702MA Op-Amp Logical Reasoning: Electronic Circuit Design
- 10. Schematic Design of Circuits ● Using Altium Designer 17.0
- 11. Simulation Results ● All the simulations are executed using Multisim Education Edition 14.0.1 Power Circuit Simulation
- 12. Simulation Results Ctd. Pre-Amplifier Circuit Simulation
- 13. Simulation Results Ctd. Low Pass Filter (300Hz) Circuit Simulation
- 14. Simulation Results Ctd. Power Amplifier Circuit Simulation
- 15. Simulation Results Ctd. Battery Level Identifier Circuit Simulation
- 16. PCB Layout ● Designed by using Altium Designer Software ● Consists with three layers ○ Top Layer ○ Signal Layer 1 ○ Bottom Layer ● Line width ○ Power lines - 20mil ○ signal lines - 10mil ● Footprints ○ SnapEDA
- 18. Signal Layer
- 19. PCB 3D Model ● Designed by using Altium Designer 17 software ● 3D models ○ 3D content Central ○ SnapEDA ○ Ultra Librarian
- 20. Enclosure Design ● Designed using SOLIDWORKS 2014