How Can I Integrate an Ultrasonic Radar with My Computer for Motion Detection?

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To integrate an ultrasonic radar with a computer for motion detection, users recommend using ultrasonic range detectors and incorporating a motor for rotation to enhance functionality. Various robotics kits are available from sources like Parallax, Heathkit, and Velleman, which can aid in building the necessary setup. These kits can provide essential components for creating a motion detection system. Additionally, users emphasize the importance of measuring the radar's pointing direction for effective detection. This approach can help achieve a successful integration of ultrasonic radar with computer systems.
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I'm new to this forum, and I'm a Computer Engineer who recently have a lot of passion for circuits.

Can anyone help me with a Ultrasonic Radar with can be worked in unison with my Computer to detect any movement.

Thankyou all for helping me in advance
 
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These guys make a some kits for robotics
This device is an ultra sound range detector, to make a real radar you would also want to add a motor to rotate it and some way of measuring where it was pointing.
http://www.parallax.com/Store/Microcontrollers/BASICStampModules/tabid/134/List/1/ProductID/92/Default.aspx?txtSearch=ultra+sonic&SortField=ProductName%2cProductName

http://www.heathkit.com/ and http://www.vellemanusa.com/us/enu/product/list/?id=523008 are also a good source of kits for robotics type things
 
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