Biomedical Sensors & Transducers — Summer 2022

Explain following terms: Measurement, Calibration and Measurand

Explain difference between Sensor, Transducer and Actuator with example.

Explain working of intravascular fiber optic pressure transducer with necessary schematic.

What is seebeck effect? Which type of thermocouple (Metal Pair) has highest sensitivity? Which type of temperature sensor has highest linearity?

Explain thermistor linearization circuit.

Anickel wire RTD has 100 ohm resistance at 0 degree Celsius. If the diameter of the Wire used is 0.002 mm, find the length of the wire element. The resistance temperature co-efficient and the resistivity of nickel are 0.0068 /Cand 8.7 x 10 -6 ohm-cm respectively. Calculate Its resistance at steam point when used in a central autoclave of a hospital.

Explain working principle, construction and transduction circuits of Resistance temperature detectors (RTD).

Enlist advantages and disadvantages of LVDT.

Explain working principle of Solar Cells and Phototransistors with necessary schematic

Enlist biomedical applications of strain Gages. Explain any one with necessary diagram.

Draw and explain wheatstone bridge circuit.

Explain working principle of Photothyristors and Optoisolator with necessary schematic.

Enlist displacement transducers. Draw and explain schematic of pressure measurement with the help of displacement transducers.

What are the units of flow? Explain types of flows in physiological System.

Explain working of doppler Frequency shift blood flow transducer.

Draw and explain Intraocular pressure monitoring system.

What are the units of pressure? Give physiological parameters pressure ranges.

Explain schematic of any angular velocity transducer.1

Explain working principle and schematic diagram of any differential pressure flow transducers.

Draw schematic of Amperometric chemical Sensor.

Write a short note on any electrochemical gas Sensor.

Explain noncontact type measurement of displacement and rotation.

Explain Beer-Lambert law with its applications in Biomedical field.

Explain principle of the pulse oximetry functioning.

Explain contact type measurement of displacement and rotation.