Detect

Designer Sangli Li has created a high-tech hat that attempts to defend the wearer from unwanted actions, such as a person suddenly shouting in your ear, or leaning in too close, by using small movable fans to quickly unfold in a blocking manner.

The SmartMat is a Wi-Fi-enabled mat designed to be placed under a regular doormat to act as a pressure sensor and allow various actions to be triggered depending on who, or what, is on it.

A University of Michigan professor has devised a method of using radar to detect concealed weapons on people in public spaces.

If you don’t trust that shifty-looking night supervisor at the motel or the suspicious-looking smoke detector in your room, you might consider investing in the Chinavision CVMV-J19 Spy Wi-Fi Signal and Camera Lens Detector.