Data glove has five bend sensors one for each fingerDetects the static movements of finger
Made by using IC-555 timer(In astable mode) alongwith photo transistorIt has a square wave outputFrequency of this square wave varies with bending ofbend sensor
Accelerometer ADXL103, used as tilt detector whichdetects tilting of handHas an analog output varying from 1.5 volts to 3.5voltsThe output of accelerometer is provided to tiltdetection module
To decrease the sensitivity of the system , output of accelerometer is amplified using additional circuitry
Checks the output of accelerometer.sends the binary data against some meaningfulgesture to gesture detection module.Gesture vocalizer system is a dual axis system whichcan detect tilt of hand in two axes.Pipelined structure of two ADC 0804 ICs are used todigitize the outputs of two accelerometers.
Two ADCs have 8-bit output , common data busand control linesPipelining of ADCs is done by using chip select pinAt a given time only one ADC is active
The microcontroller receives the data from two ADCsone by one and saves themNow the microcontroller compares these values withpredefined values in its memory to represent it’s ameaningful gesture or notIf it is a meaningful gesture, then microcontrollersends the data to gesture detection module
Most Important and core part Microcontroller controlled circuitry Three ports are in use(two input and one output)• Port 0• Port 1• Port 2
• Port 0 (Input port) Microcontroller checks the output of first bend sensor , calculates its pulse width, stores this output and moves on The bends are quantized into ten levels and the finger must be at any of these ten levels and the system knows how much each finger is bent. Now the system reads the movements of all the fingers as a whole and moves on to next step , if the bend is a meaningful one.
• Port 1• Receives 8-bit data from tilt detector and if that is a meaningful tilt, then the gesture as a whole (bend+tilt) is considered as a meaningful one and generates a 8-bit data This 8-bit data can represent 256 (28 = 256) different gestures
Consists of a microcontroller, a speech synthesizer ( ICSP0256) and a speakerThe microcontroller receives the 8-bit data fromgesture detector and determines what gesture hasbeen madeThe speech synthesizer IC SP0256 has someallophones
Allophones-Sounds that are merely phonetic variants ofthe same phoneme are allophonesEg: ’s’ of sing and the ’r ’ of ringEach allophone has a particular address locationThe microcontroller’s 8-bit address corresponds to aparticular allophone and same can be heard on speaker
It is useful for the deafVoice is represented in text form
The 8-bit data given by gesture detection moduleis given to LCD module.The LCD display module checks each word andcompares it with previously stored valuesBased on this comparison, the microcontrollerdecides what must be displayed on LCD
Designing of wireless transceiver system for "Microcontroller andSensors Based Gesture Vocalizer"
Perfection in monitoring and sensing of thedynamic movements involved in "Microcontrollerand Sensors Based Gesture Vocalizer“
The Robot control system to regulate machine activity atremote sensitive sites
Basis for communication for the disabledConveys sign language into voice for the blind and as textfor the deaf
India’s population 121 million , 2.1% of population is disabled Blind - 15 million Deaf – 10 million Dumb – 2.7 million Thus if proper light is thrown on R and D for this device , everyperson with the above three disabilities can communicate easilywithanyone