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to save persons under earthquake rubbles
Post: #1

please send more details about detection of persons under earth quake rubbles using micro contoller....we have seminars....please send the details.....
Post: #2
man please read this page where its described, if you want more help please reply there
Post: #3
hey plz send some more details...
Post: #4
Collapsed buildings due to earthquake or terrorist attack typically result in a rubble pile with
access holes less than 1 foot in diameter.The need for robots which can
locate survivors quickly is evident in light of recent disasters and attacks.smaller
micro robots can move through small openings which larger robots are not be able to access.The planned method is to place the micro robots at the top of the rubble heap so that little energy
is consumed as the micro robots search downward. The small hopping robots which are deployed here have a simple locomotion mechanism
and sensory elements have been developed to detect survivors under collapsed buildings.generating lift and thrust forces is done by micro eccentric motors and they carry sensors
for detecting the thermal signal of survivors.This micro robot can crawl without any
wheels or legs on small, rough terrain with the help of eccentric mechanical vibration.It also has the ability of self-righting to allow it to keep moving to the target even if it
falls and lands in any position.Weight balance as well as resonance parameters provide good mobility. Automatic navigation to the target is achieved with simple
on-off motor switching.These simple design parameters result in lightweight low cost robots allowing deployment of a large number of robots in the field. many small robots with optical and IR sensors have been
developed and movement toward a human body under dark conditions has been successfully
demonstrated.This small robot consists of micro eccentric motor for hopping and thrusting with
the help of resonating vibration, as well as micro sensory element, button battery and electronics
for detecting the signal source.many small robots with thermal micro sensors and micro CCD camera are
designed and developed that can approach human body based on the thermal signal and transmit the visual information to the operator to check the target. Several microphones with
high sensitivity and directionality can identify the location of the coordinate position of the small
robots that are close to the suvivors.
Some proposed additions include:
a)Sound signal generator capable of being implemented into the tiny robots with CCD camera.
b)Small robots also can be launched to the field over the obstacles by the launcher mechanism and sound signal from the robots can be detected to determine its position.
c)High directional multiple microphones can be controlled to scan the field to detect the signal
d)Combination of local coordination data and global one can provide the location map.

The sensor:
Previously, optical sensor and IR sensor were mounted on the micro robot to allow
to approach the illuminant and thermal source like a human. But with this thermal source could not be distinguished between human and a false thermal source. Here, a small CCD camera is
implemented on the small robot and the visual image can be transmitted to the operator although
the electric power is still supplied by the cables.Simple electronics can alternate
the current to the motor so that it can
change the heading to the target.the detected
signal can directly control the transistor gate current to each motor.One detector is set to the head of robot for checking the temperature of the target.range of temperature from the target is very important to identify that it is human.For precise motion control, PIC is
implemeneted to control the PWM current driving the motors according to the amounts of the
recieved signal.

Seminar report:

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