Touch Screen controlled surveillance vehicle
description
Transcript of Touch Screen controlled surveillance vehicle
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Block Diagram
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4-Wire Touch Screen
3-D Electrical Equivalent of the TS
Screen Interface to the MCU
ITO conductive layers FPC Cable Active Area Rtouch ↓ when the TS is touched
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X & Y position Measurements
Measurement X+ Excite X- Excite Y+ Excite Y- Excite
Standby Gnd Hi-Z Hi-Z Pull up / Int
X-Coordinate Gnd Vcc Hi-Z Hi-Z / ADC
Y-Coordinate Hi-Z Hi-Z / ADC Gnd Vcc
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Problems Faced
Switching i/p & o/p on same lines Fluctuations in readings if done fast Need of Touch Interrupt ADC resolution 10 bit to 8 bit Noise on lifting stylus
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Graphical LCD
128x64 pixels KS0108 on-chip controller Screen divided into two parts- left & right
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GLCD working
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Problems Faced
No ready library available Timing Simulation Reading from the GLCD Green version voltage thresholds
different from the Blue version
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Background Math
2 2d a b
1tan m
Rectangular to Polar Conversion
Distance:
Angle:
a = x1 – x0b = y1 – y0m = b/a
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From Transmitter:s[angle],[distance]e.g. s0030,040 s-050,020
At receiver: θ = θ2 – θ1
Rotate the vehicle by angle ‘θ’Then move forward by ‘d’ distance
θ2
θ1
θ0
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Survey Send Clear
Touch ControlSurveillance Vehicle
Searching...
Device 1
Mode:
AutomappingUser guided
Welcome Screen
Search for all the devices in thevicinity of the transmitter
Select ‘Mode’:Autonomous Mapping of the region orManually guiding the vehicle
The Main Screen with active area & menu
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Survey Send Clear
Draw the path to be followed(100 samples will be taken)
‘Send’ the data to the vehicle through RFand start the vehicle
‘Clear’ screen to draw another path
‘Survey’ to get the sensor data from the vehicle
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