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Himanshu Mazumdar
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Dr.Himanshu S. Mazumdar, Senior member IEEE
hsmazumdar@hotmail.com

Firmware Projects:

·        Walking and Multilingual Speaking Robot

·        Yarn Evenness Testing System

·        VHF Networking for Bank Security

·        Loom Data System

·        PC Based Digital Oscilloscope

·        Remote Control using Radio Pager

·        On Line Opinion Polling System

·        3-Phase Power Factor Correction Controller for Vienna Rectifier

·        3-Phase Power Line Emulator

·        Programmable Circuit Breaker

·        Moving Display System

·        Industrial Timers

·        ECG Monitoring System

·        EEG Monitoring System

·        PC Based Sample Loom

 

Title: Walking and Multilingual Speaking Robot

Objective: To develop a walking and speaking educational robot for science exhibition.

Description: A robot is developed with two stepper motor driven wheels and a free wheel. The robot is controlled using intel8085 microprocessor connected to two stepper-motor drivers, a Vortex Speech Synthesizer and a multilingual ASCII terminal.  FORTH cornel and program is used to implement walking and speaking algorithms.

  Funding Agency: Physical Research Laboratory, India

 

Title: Yarn Evenness Testing System

Objective: To develop a capacitor type sensor and measuring instrument to measure the diameter of the yarn and calculate the evenness, thick places, thin places and naps of running yearn at desired sampling rate.

  Description: A dual capacitor type sensor is developed. Capacitors are identical and air gap type. These are connected to the tank circuits of two oscillators. Moving yearn under test is passed through one of the capacitor. Difference frequency depends on the dielectric of the yarn that is interfaced to a PC.  Pascal software is used to sample the difference frequency and measure and display the evenness, thick places, thin places and naps of the running yarn. The know-how is transferred to manufacturer.   

  Funding Agency: Dept. of Electronics, Govt. of India

 

Title: VHF Networking for Bank Security

Objective: To develop a network using analog VHF trans-receivers to monitor all Bank Volts and similar installations of a city and display the status of installed sensors in central police control room

.Description: An analog VHF trans-receivers based network is developed in master slave mode to display the status of 64 installations in a city in a radius of 50 Kilometers. An Intel 8085 based board is designed with IR sensors input, FSK modem and relay switch output to interface with VHF voice trans-receivers. The control station is having VHF set interfaced to a PC. The network protocol data logging and map display is performed using Pascal program.

  Funding Agency: Dept. of Electronics and Dept. of Home, Govt. of India.

 

Title: Loom Data System

Objective:  To develop a data actuation system for high-speed water-jet / air-jet looms to monitor production, loom status, maintenance parameters and produce appropriate different production and maintenance reports for management and alarms for operators.

  Description: An Atmel89C2051 based controller card is developed with keyboard; LED display, counter and digital input-outputs and RS485 interface. Keyboard is used to enter unusual fault condition, 2 digits LED displayed loom Status, Counter is used to record production, digital inputs are used to monitor breakages and limiting conditions and output is used for alarm. A controller is connected to each loom.  The controllers are connected to a PC through PLC unit using MODBUS protocol. The loom data is stored in ORACLE database. The front end is written in VB.

Funding Agency: Reliance, India

 

Title: PC Based Digital Oscilloscope

Objective: To develop simple embedded controller based hardware with ADC to connect to PC via serial port and simulate a virtual PC based Oscilloscope for electrical waveform viewing and measurement.

  Description: An Atmel89C52 based data actuation card is developed with 8 channels 8-bit ADC and 32k externally addressable static RAM connected in DMA to CPU. The CPU is connected to a PC via RS232 interface. A VC++ front end is written to emulate Oscilloscope with verity of signal processing function implementation like- FFT, Wavelet, Auto correlation, Cross correlation, FIR filtering, Function generation, Modulation etc. This low cost oscilloscope is fount useful for students training program.

  Funding Agency: DDIT, University, Nadiad, India

 

Title: Remote Control using Radio Pager

Objective: To develop an interface with Radio Pager Receiver to control remote systems like irrigation pump, street light etc.

  Description: Radio pagers uses error correcting code and are having simple low cost reliable operation. Some pagers use POCSAG data format that is well documented.  An Atmel89C51 based controller is developed to interface POCSAG type radio pager to external output devices. Sending appropriate text messages controls pager’s output devices. 

  Funding Agency: An industry sponsored project

 

Title: On Line Opinion Polling System

Objective: To collect answer of objective questions from audience in an auditorium using small 4 key keyboards provided to each persons.

  Description: A box having 4 key keyboard and 4 LED indicators is fitted in each chair of a large auditorium. Every 12 key boxes are connected to a multiplexed micro-controller. All micro-controllers are connected to a PC using RS 485 interface in master-slave mode. A front-end program is developed using VC++ and at backend Access is used to store the results. This system is used in an International Medical Conference to collect opinion poll of medical experts during online surgery and medical case study.

  Funding Agency: Urology Hospital, Nadiad, India

 

Title: 3-Phase Power Factor Correction Controller for Vienna Rectifier

Objective: To control the gate voltages (PWM) of MOS FETs of three Vienna Rectifiers connected to 3-phase AC supply such that the Output DC voltage of rectifier remains constant at desired level and current flowing through each phase are sinusoidal and in phase with input voltage.

  Description: A Fuzzy controller is designed to control 3-phase Vienna rectifier. The controller has 8 channel ADC inputs, 1 bit phase sync input and 3 channels PWM output. Input phase voltage and current is measured using 6 analog input channels, output voltage and current is measured using 2 analog input channels. Depending on input state an output PWM table is selected. The input frequency is measured from sync input and PWM output rate is calculated. The PWM is delivered synchronously even if input frequency and phase is fluctuating. This work is presented in Power Electronics Conference, Long Beach, and Nov.5, 2003.    

  Funding Agency: IXYS Corporation, USA

 

Title: 3-Phase Power Line Emulator

Objective: To develop a low voltage, low current 3-phase power source with user selectable voltage and frequency with phase current monitoring outputs.   This power source emulator is to be used as test and measuring instrument in power electronics labs.

  Description: A 3-phase power source is developed using Atmel89C52 micro-controller, three 8-bit DAC and five push switches. The DAC output is further amplified to deliver +/- 10V AC output. Series current is monitored using small series resistance and amplified output is given as +/- 10V current output. This unit is used while developing “3-Phase Power Factor Correction Controller for Vienna Rectifier”. This work is presented in Power Electronics Conference, Long Beach, and Nov.5, 2003  

  Funding Agency: IXYS Corporation, USA

 

Title: Programmable Circuit Breaker

Objective: To develop a power cutout system that energizes on given input voltage, input current condition and desired waiting period. 

  Description: A Programmable Circuit Breaker is designed using Atmel89C51 based controller and AD0809 ADC. The circuit breaking conditions are stored in lookup tables with desired delay time.

  Funding Agency: An industry sponsored project

 

Title: Moving Display System

Objective: To develop a moving LED matrix display of size 96x16 controlled by stand-alone micro-controller and remotely refreshed by radio pager. The display should support English, Hindi and Gujarati Fonts and import image from windows bmp files.

  Description: A 9’x1. 5’ LED display panel is designed using bright glow LED matrix of size 96x16. Six identical 16X16 LED cascaded modules are used. Only first module is connected to a micro-controller with 32K ROM, 32 RAM and RS232 PC interface. The PC interface is extended using Radio Pager.

  Funding Agency: Gujarat Samachar News Paper, Gujarat, India

 

Title: Industrial Timers

Objective: To develop a programmable industrial timer to control the power of glow signboards.

  Description: The system consists of Atmel89C51 based controller with 4 seven-segment LED display, 3 push switches and a relay. The system is powered by rechargeable 12V battery and charging circuits.

  Funding Agency: An industry sponsored project

 

Title: ECG Monitoring System

Objective: To develop a low noise PC based Electro Cardiogram system to monitor the electrical signal generated by heart. 

  Description: Five silver coated coins are used as probe. Right leg is connected to common ground. Both hands and left leg are connected to negative input and chest is connected to positive input of a low noise instrumentation amplifier. The amplifier is adjusted for high common mode rejection ratio. The amplifier is restricted to 0.1 to 20Hz bandwidth. The output waveform is digitized using AD0809 ADC and interfaced to printer port of PC. The console program is written in Pascal to display ECG waveform different position of chest (V1, V2, V3, V4, V5 and V6). The program calculated heart rate and S-T segment delay.

  Funding Agency: Physical Research Laboratory, India

 

Title: EEG Monitoring System

Objective: To develop a low noise PC based Electro Encephalogram system to monitor the electrical signal generated by brain. 

  Description: Three silver coated coins are used as probe. The probes are placed to desired positions on the skull. Center probe is connected to common ground. Other two probes are connected to negative and positive inputs of a low noise instrumentation amplifier. The amplifier is adjusted for high common mode rejection ratio. Four band pass filters corresponding to alpha, beta, theta and delta follow the amplifier. The output waveforms of filters are digitized using AD0809 ADC and interfaced to printer port of PC. The console program is written in Pascal to display EEG waveforms.

  Funding Agency: Physical Research Laboratory, India

 

Title: PC Based Sample Loom

Objective: To develop a scale down version of Dobby type handloom to weave sample fabric that will get the weave information from an embedded controller.

  Description: A wooden handloom is fabricated with 128 warp ends. Every 16th end is connected to a common tie bar. Sixteen such tie bars are connected through 16 solenoid selected and hand driven mechanism. An intel8085 based battery operated microprocessor energizes solenoids as per desired weave for each weave cycle. This loom is used for producing sample fabric saving cost and time. This project received appreciation and citation from cabinet minister of textile, India.  

  Funding Agency: National Handloom Development Corp. India