Biomedical Transducers and Actuators

GANPAT UNIVERSITY FACULTY OF ENGINEERING & TECHNOLOGY Programme Bachelor of Technology Branch/Spec. Biomedical Engineering Semester III Version 2.0.0.1 Effective from Academic Year 2023-24 Effective for the batch Admitted in July 2022 Subject code 2BM3102 Subject Name Biomedical Transducers and Actuators Teaching scheme Examination scheme (Marks) (Per week) Lecture(DT) Practical(Lab.) Total CE SEE Total L TU P TW Credit 3 - 1 - 4 Theory 40 60 100 Hours 3 - 2 - 5 Practical 30 20 50 Pre-requisites Basic knowledge of various physiological parameter. Course Outcomes On successful completion of the course, the students will be able to: CO1 Students will understand and describe the basic principle of transducers and actuators CO2 The contents will allow the students to understand the importance and recommend the sensors and transducers for medical applications CO3 Students can identify various types of transducer, sensors and actuators including electrical, electromechanical and magnetostrictive actuators. CO4 Select use actuators and make design for different biomedical applications Theory syllabus Unit Content Hrs. 1 INTRODUCTION: Generalized Instrumentation system, Measurement, Accuracy, Precision, Errors in measurements, Signal and Noise, Calibration, Transduction principles, Classification and Characteristics of Transducers. 4 2 RESISTIVE TRANSDUCERS: Principle of resistive Strain Gauge, Type of strain gauges, Strain gauge materials, Gauge factor, Signal Conditioning circuit, Temperature compensation, Bridge balance circuit. Applications. 4 3 DISPLACEMENT TRANSDUCERS: Resistive- Potentiometers, Inductive- Variable Inductance and LVDT, Capacitive type, Piezoelectric Transducers, Types of Diaphragms, Bellows, Bourdon Tubes. Applications. 4 4 TEMPERATURE TRANSDUCERS: Thermo resistive- Resistance Temperature Detectors (RTDs), Thermistor, Thermistor used for Cardiac output measurement and Nasal air flow measurement, Thermoelectric -Thermocouple, PN junction diode, Non-contact type temperature measurements techniques- Radiation thermography, Pyrometer, Infrared temperature probe, Optical Pyrometer. Applications. 5 5 PIEZOELECTRIC TRANSDUCERS: Piezoelectric phenomena and materials, Output voltage expression of Piezo crystal, Piezoelectric Force transducer, Piezoelectric acceleration transducer, Equivalent circuit of Piezoelectric transducers and Dynamic characteristics. Applications. 6 6 PRESSURE TRANSDUCERS: Occlusive cuff method, Force balance methods, Direct hydraulically Coupled Catheter transducer system, Diaphragm pressure transducers, Piezoelectric pressure transducer, Electrical transduction methods for Catheter tip transducer, Optical transducers, Implantable pressure transducer, Micro pressure transducer, 6 7 Actuators Definition of actuator, Actuators as system components. Actuator in open and closed loop mechanism, Energy controller and energy converter. 3 8 ELECTRO MAGNETIC ACTUATORS: Definition of electromagnetic actuators; AC and DC servomotor: Construction features and characteristics, Principle of linear motor and linear motor as actuator. 4 9 STEPPER MOTOR: Principle, Types of stepper motor, Operation and construction, Half, full and Micro stepping, Torque equation, Sizing of stepper motor, Stepper motor driving circuit. 4 10 LINEAR ELECTROMECHANICAL DEVICES: Relays: Basic components of electromagnetic relay, AC & DC relay Contact type & material, Reed Relay: Dry and Mercury, Thermal Relay, Solid State Relay. Solenoid valve, plunger magnet. Magneostrictive actuator 5 Practical Contents Term work and practical shall be based on the above syllabus. Text Books 1 Medical Instrumentation- Application and Design By John Wiley and Sons. John Webster. Inc., New York. 2 Industrial Instrumentation & Control,2e By S.K.Singh Reference Books 1 Principles of Applied Biomedical Instrumentation By: L.A Geddas and L.E.Baker 2 Transducers for Biomedical measurements By: Richard S.C. Cobbold, 3 Biosensors By: E.A.H.Hall 4 Electrical Machines By: H. T. Kashipara, Mahajan Publishing House. ICT references 1 http://www.pcbheaven.com/wikipages/How_Stepper_Motors_Work/ 2 https://nptel.ac.in/courses/112103174/32 3 http://nptel.ac.in/courses/112103174/16 4 http://nptel.ac.in/courses/115103030/26 Mapping of CO with PO and PSO: PO1 PO2 PO3 PO4 PO5 PO6 PO7 PO8 PO9 PO10 PO11 PO12 PSO1 PSO2 PSO3 CO1 3 2 3 1 2 0 0 0 1 0 0 2 1 2 1 CO2 3 0 0 0 0 2 0 3 1 0 0 2 2 2 1 CO3 1 3 1 0 1 1 2 0 1 0 1 1 2 3 2 CO4 2 2 1 1 1 1 1 0 1 0 1 1 1 2