Dept. of Applied Physics, Calcutta University.
Research Project:

Design, development, fabrication and studies has been made on the followings:-

1. Use of thermistor in the temperature measurement of liquid oxygen.
2. Broad range linearization of thermistor in the temperature measurement.

Abstract of the work:

Thermistor is a highly nonlinear temperature sensor. Piece wise linearization method developed for thermistor in to the temperature range of -170 C to 70 C . The prototype was developed and it was used for the measurement of liquid nitrogen temperature.

Ergonomics Laboratory, Dept. of Physiology, Calcutta University.
Research Project:

Biomedical evaluation of static and dynamic work of Indian workers for the betterment of productivity and performance.

Financial support:

Indian Council Of Medical Research, New Delhi – 110016, India.

Aims and objective:

To develop, fabricate and standardize some socially acceptable Monitoring instruments for evaluation of static and dynamic work performed by the industrial and agricultural workers.

1. Use of thermistor in the temperature measurement of liquid oxygen.
2. Broad range linearization of thermistor in the temperature measurement.

Abstract of the work:

Thermistor is a highly nonlinear temperature sensor. Piece wise linearization method developed for thermistor in to the temperature range of -170 C to 70 C . The prototype was developed and it was used for the measurement of liquid nitrogen temperature.

Achievement:

Successful design, development, fabrication and studies had been made on the following subjects:-,

1. Development of on-electrode amplifier for ECG pre-amplifier to avoid base line drift during recording of ECG signals.
2. Development of portable three channel pre-amplifier for EMG signals for evaluation of static and dynamic work.
3. Design and fabrication of portable/ dismountable Faraday Cage for recording low-level ECG /EMG signal for studies of human subject during work.
4. Development of miniature portable reaction timer to measure psycho-physiological performance of worker during work.

Measurement laboratory, Dept. of Applied Physics, Calcutta University
Research Project:

Studies of Physical properties of the Elbow Prosthesis with the help of a developed ELBOW-JOINT- SIMULATOR

Financial support and colaboration:

Prof. Durgapada Baksi, MS, MS (ORTHO), FRCS, PhD
Ex-head/Prof. Dept. of Orthopedics, Medical College & Hospital,Kolkata

Aims and objective:

To design, develop and fabricate suitable elbow joint simulator (Movement testing device) with a viewpoint of Biomechanics of Elbow joint. In vivo studies of wear and tear of the total elbow prosthesis with cadaver bone after pre-defined number of operations.

Achievement:

Successful studies have been made on IN-VIVO studies of artificial Total elbow prosthesis with the developed and fabricated Elbow joint simulator. This was a grants successful study and design. This low cost Total Elbow Prosthesis now is known as Dr. Baksis long lasting floppy prosthesis after long term (30 years) of clinical studies. Floppiness was predicted during the study and designed enormously removed risk of infection during operation and reduces post-operative risk.

Process Control Laboratory, Dept. of Applied Physics, Calcutta University, Kolkata
Research Project:

Investigation on some New Sensing Techniques and Control Instrumentation Systems of a Process Plant

Financial support:

1. All India Council of Technical Education Govt. of India, AICTE MODROB, Project
2. M.H.R.D, Govt. of India, MODROB Project
3. Dept. of Applied Physics, University College of Science, Technology & Agriculture (Calcutta University) Kolkata, WB (Departmental Grant)

Title of the Research projects:

A. Sensing Electronics in the Field of measurement

1. Designed and developed an operational amplifier based bridge network for accurate measurement of transducer parameters.

2. Designed and developed a novel non-contact capacitance type technique for measurement of level of a conducting liquid in a metallic or non- metallic vessel with isolated vessel ground and circuit common.

3. Designed and developed a novel non-contact capacitance type technique for measurement of level of a conducting liquid in a metallic or non- metallic vessel with non- isolated vessel ground and circuit common.

4. Designed and developed a microprocessor based flow controller using the modified vortex flow sensor.

5. Designed and developed a microprocessor based flow controller using the bridge type flow sensor.

6. Designed and developed a microprocessor based flow controller using the resistance and semiconductor type sensors.

7. Designed and developed a PC based liquid level control system using the single and double electrode sensors.

8. Designed and developed a PC based liquid level control system using the non-contact capacitance type sensor.

9. Designed, developed, fabricated and installed a miniature steam generation plant with PC based instrumentation system under the MODROB Project financed by MHRD, Govt. of India

   a) To develop a PID Control loop in Demo Mode and study its performance for different values of PID parameters.

   b) To develop an analogue display unit in Demo. Mode and study its static and dynamic performance for different analogue signals.

   c) To develop a boiler drum level display unit and to draw its static and dynamic characteristics.

   d) To develop a boiler drum temperature display unit and to draw its static and dynamic characteristics.

   e) To develop a boiler drum pressure display unit and to draw its static and dynamic characteristics.

   f) To develop a boiler feed water flow display unit and draw its static and dynamic characteristics

   g) To develop the main steam flow display unit of the steam generation plant and to study its performance.

   h) To develop the temperature display units of the primary super heater and secondary super heater of the steam generation plant and to draw their static and dynamic characteristics

   i) To develop the position control system of an electric motor operated control valve and to draw its static characteristic curve.

   j) To draw the flow characteristic curve of an electric motor operated control valve

   k) To develop the single element type drum level control loop and to find its tuning parameters from the process characteristics.

   l) To study the performance of the pressure switch of the feed water pressure vessel of the boiler drum.

   m) To develop the main steam temperature control loop of the steam generation plant and to study its performance at different control parameters.

   n) To develop the three element type boiler drum level control unit and to study its performance at different control parameters.

10. 10. Designed, developed and installed a PLC based instrumentation system of the miniature steam generation plant of the Process Control Laboratory

   a) Designed, developed and installed a boiler drum pressure transmitter using piezo resistive sensor and tested its static and dynamic characteristics.

   b) Designed, developed and installed five number low noise head mounted temperature transmitters and tested their static and dynamic characteristics

   c) Designed, developed and installed three number position control circuits of three motor actuated control valves and tested their performance characteristics.

   d) Designed, developed and installed a two electrode transmittance type boiler drum level transmitter and tested its static and dynamic characteristics.

   e) Designed, developed and installed six number heater control circuits by using proportional on time control technique and tested their performances with the three phase heater units of boiler drum and super heater.

   f) Designed, developed and installed the control panel of a PLC based Instrumentation system of the above steam generation plant with M/s G.E. Fanuc make series 90-30 PLC.