For your NXT or EV3
Sensors
Accelerometer, Compass & Gyro
Motor Multiplexers & Controllers
Wireless Control
Sensor Adapters & Multiplexers
RC Servos, Mountings & Pneumatics

Sensor Kits
Flexi-Cables & Cable Extenders
Classroom packs of Flexi-Cables
Plugs and Connectors
Power Options
Other Robotics accessories

EV3 Console Adapter
EV3 Sensor Adapter for NXT or Arduino
EV3 Compatibility Info

Android App for NXT/EV3

Arduino Products
Shields and Controllers

Raspberry Pi Products
For your Raspberry Pi

Connect with us
Google+
Shopping Cart
Your cart is empty.

Ordering Information
Our Distributors
World Wide Shipping
How to Order and Pay
Paying by Credit Card
Your satisfaction is important to us
About mindsensors.com
Site Map

Yondering ...
Forums
FAQ
Videos
Coming Soon ...
End of Life Products
Robotics related Links

Downloads
NXT Product Docs and Software
User Guides
EV3 Blocks
API's and Sample Programs
NXT-G Blocks
All Downloads

EV3 Programming Environment
Which Programming Environment do you prefer for EV3?
EV3 Home Edition
EV3 Edu Edition
LeJOS
MonoBrick
RobotC
ev3dev
Other



[View Result]

Votes: 1230
Translate this site
Translate this site: (Courtesy of Google™)
Search Web Pages



Need Quote for your School?
Write e-mail to:
info
Need Technical Support?
Write e-mail to:
support
Note your order number in the support request.
You can find order number on your Packing-slip or Order confirmation e-mail.


Proud Supporter of:
Robofest


Trinity College Fire Fighting Robot Contest.

Contact:
E-mail:
info
Address:
mindsensors.com

8623 Mayland Drive
Henrico, VA 23294-4703 USA.
Phone: (804) 767-8116
Fax: (804) 747-5303
Official PayPal Seal
UltraSonic Proximity Detector
Features
USPD1There are several distance measuring tequniques like Infra Red, Radio Wave (RADAR), Ultra Sonic Waves (SONAR) each of them have some advantages and disadvantages. Most of the time, optical tequniques are preferred for their high resolution. However they are not best suited for the Transparent objects. As well optical performance is limited in unclean environments. On other hand although ultrasonic distance measurement has lower resolution (fraction of wavelength of sound) it perform much better than optical in unclean environments or with transparent objects. Comparing USPD with GP2D12 distance sensor, USPD can work in dusty enviroment, detect transperent/black objects, however may not be very efficient in detecting "Acoustically soft or damping" objects. USPD output is linear with distance And since it is low power device it can operate continuously.

mindsensors.com has developed an Ultrasonic Proximity detector with range of 30 cm to 1.5meters. This sensor is capable of detecting distances of objects in front with accuracy of 4-5 cm.
How USPD works
USPD has two ultrasonic sensors one is transmitter and other is receiver both are tuned to resonate at 24 kHz. Microcontroller inside USPD send burst of 24 kHz to transmitter. Then it times and listens for echo from the amplified output of the receiver. Since receiver is also tuned for 24 kHz it acts as 24 kHz band pass filter rejecting every thing else. Once microcontroller receives the echo in donain it calculate the distance of the object. Since it only Looks for the first echo, if there are more objects in front it would only detect the closest one.
Circuit Diagram
Circuit DiagramThis is the circuit we developed for our USPD.
Calibration Chart
calibration ChartThe calibration chart for USPD.