This PPT presentation is based on the topic SMART SENSORS
SMART SENSORS is very common topic for seminar presentation.
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A `smart sensor' is an assembly of the sensing element an associated electronics for signal conditioning and data processing etc.,on the same chip.
A smart sensor is required to have the following essential subsystem
1. Sensing element
2. Exciter with control
3. Amplification modules
7. Digital information processing module
BASICS OF SMART SENSOR
Complete sensor systems have been realized on a single chip where traditional functions,such as signal conditioning, data-communication, A/D conversion and the generation of reference and compensating signals are no longer performed by separate components, but are all integrated on the same IC.
EVOLUTION OF SMART SENSORS
Sensors have progressed through following stages
First generation devices
Second generation devices
Third generation devices
Fourth generation devices
Fifth generation devices
In fifth generation, data conversion is accomplished on the same sensor chip
TECHNOLOGY OF SMART SENSORS
A modern microprocessor-cum-micro sensor is composed of
(i) the sensing element
(ii) a signal processing part
(iii) the microprocessor
Parts (i) and (ii) are fabricated on a single chip to form a smart sensor
SOME EXAMPLES OF SMART SENSORS
Different smart sensors are given below:
2. THREE-DIMENSIONAL EYE MOVEMENT MEASUREMENT USING SMART VISION SENSORS
3. SMART ACCELEROMETER SYSTEM
4. SMART AUDIO SENSOR FOR TELEMEDICINE
The simplest Hall element uses a square plate of N-well in a p-type epitaxial layer.
Typical sensitivities of Hall plates fabricated in standard CMOS technology are in the order of 100mV/VT.
Commercially available Hall sensors typically operate over ranges that start at 1mT and have noise levels in the order of 50-100µT.
SMART VISION SENSORS
State-of-the-art imaging technology permits accurate three- dimensional measurement of eye movement (horizontal, vertical, torsional).
3D eye measurement is done using this sensor
SMART ACCELEROMETER SYSTEM
Smart Accelerometer System is an acceleration measurement System containing:
a temperature sensor
IRIG-106 PCM encoder
RS485 interface and
three analog outputs
SMART AUDIO SENSOR FOR TELEMEDICINE
The smart audio sensor analyzes the audio signals, detects events, recognizes the type of noise and sends the information through a CAN bus.
This sensor is equipped with microphones in order to detect a sound event.
The originality of the approach consists in replacing the video camera monitoring, which the patients are uncomfortable with, by microphones surveying the sounds.
It uses the hardware implementation, the software treatments and a first evaluation of the algorithms.
IMPLEMENTATION AND FUTURE USE
There are many applications of smart sensors of which some practical uses are realized as
1.Electronic compass for measurement of directions with greater accuracy.
2. Hydraulic cylinder height application for measurement of height
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