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De-mining (the detection of landmines), the detection of weapons such as knives and guns (particularly in airport security), geophysical prospecting, archaeology, and treasure hunting are just some of the applications. Metal detectors are also used to detect foreign bodies in food, as well as steel reinforcement bars in concrete and pipes.
The device that performed this function in the receiver circuit was called a detector. [1] A variety of different detector devices, such as the coherer, electrolytic detector, magnetic detector and the crystal detector, were used during the wireless telegraphy era until superseded by vacuum tube technology.
Newer speed detection devices use pulsed laser light, commonly referred to as LIDAR, rather than radio waves. Radar detectors, which detect radio transmissions, are unable to detect the infrared light emitted by LIDAR guns, so a different type of device called a LIDAR detector is required. However, LIDAR detection is not nearly as effective as ...
This type of device is used widely in industry and can be found in locations, such as on oil rigs, to monitor manufacturing processes and emerging technologies such as photovoltaic. They may be used in firefighting. Gas leak detection is the process of identifying potentially hazardous gas leaks by sensors. Additionally a visual identification ...
The materials basis for infrared detection devices are narrow-gap semiconductors, including compounds and alloys of bismuth, antimony, indium, cadmium, selenium and others. [3] [4] Lead(II) sulfide (PbS) Mercury cadmium telluride (Known as MCT, HgCdTe) Indium antimonide (InSb) Indium arsenide; Indium gallium arsenide; Lead selenide; QWIP ...
The name of the detector is a pun [3] which was bestowed upon it by Fred Reines, one of the scientists working on the project.The name is derived from the Hindi word "bhang", a locally grown variety of cannabis which is smoked or drunk to induce intoxicating effects, the joke being that one would have to be on drugs to believe the bhangmeter detectors would work properly.
In general, detection is the action of accessing information without specific cooperation from with the sender. In the history of radio communications, the term " detector " was first used for a device that detected the simple presence or absence of a radio signal , since all communications were in Morse code .
The device can also detect several different types of explosives than just TNT and may be more consistent than a trained dog, which may be expensive to train and whose performance may be affected by a variety of unknown and uncontrollable factors. [6] [11] [31] However, the Fido explosives detector is also inhibited by ambient temperature, such ...