Electronic Systems  


Current Developments


SCL, in the past, has successfully developed many products for Industrial, Bio-Medical, Banking, Power and other sectors. The present developments under progress include the following:


 
Firemod
 


An Anti Spurious Fire Warning System for preventing fire extinguisher bottles from firing in case of a spurious/false fire alarm with inbuilt test/dynamic self check features. Measurement and comparison of rate of rise, amplitude and duration of temperature as represented by electrical signals are made use of in distinguishing the Spurious Fires.  System consists of Control, Power and Signal processing electronics housed in a custom designed package, meeting the required quality levels

 

Pulse Oximeter
 


Pulse Oximeter is a handheld battery operated instrument for non-invasive monitoring of saturated oxygen content in the blood which enables prompt recognition of hypoxemia and pulse beat of the patient. The working principle is based on trans-illuminating the tissues containing arterial blood and evaluating the amount of absorption of red and infra-red light by the blood.

The oximeter has a memory to store records of 100 patients and the stored data can be downloaded to a PC.

 

 


The light absorbance of oxygenated hemoglobin is different from that of reduced hemoglobin, at the two selected wavelengths of the oximeter (Ref: http://www.oximetry.org/index.htm).  The LEDs in the finger probe are pulsed at intervals of 2.5µs for a pulse duration of 625µs and the transmitted signal is detected by photodiode.

This project was funded by DIT, and undertaken jointly by SCL & CSIO for the ‘Technology Up-gradation of Pulse-Oximeter’ in India. SCL’s involvement includes design & development of the electronic systems of the  instrument whereas CSIO has designed & developed the mechanical housing, finger probe and final prototype sample, and is responsible for final clinical trials

 
Radio-Sonde
 

Radio Sonde transmits Pressure, Temperature and Humidity data of the environment at intervals of 1 second.   The parameters sensed by the MEMS based transducers condition, process and transmit to ground. 

The development of the sensors and ASIC are underway.