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How anti-theft tags work - magnetostriction
- Published_at:2015-11-30
- Category:Science & Technology
- Channel:Applied Science
- tags: magnetostrictive Magnetostriction acoustomagnetic magnetoacoustic anti-theft tag marker physics metglas iron ben krasnow applied science oscillator microscope
- description: Anti-theft tags contain a tiny mechanical oscillator that is activated by a magnetic field. The detectors at a shop's doorway can detect the oscillation magnetically. The tag can be activated and deactivated by magnetizing or demagnetizing it, respectively. Special thanks for your support: Matthew Hill Erik Saathoff Max Loutzenheiser (better credits titlescreen in the next video!) Support Applied Science: https://www.patreon.com/AppliedScience Sources: http://www.metglas.com/products/magnetic_materials/2826mb.asp https://www.google.com/patents/WO1999013442A1?cl=en&dq=magnetostrictive+marker&hl=en&sa=X&ved=0ahUKEwjT8bCCtLLJAhVP9GMKHYThCY8Q6AEIMjAD https://patents.google.com/patent/WO2008032274A2/en?q=magnetostrictive&q=amorphous&q=theft https://www.google.com/patents/US4510489?dq=4,510,489&hl=en&sa=X&ved=0ahUKEwi0x_SosbLJAhVJyWMKHbl_AI4Q6AEIHDAA https://www.google.com/patents/US4298862 https://en.wikipedia.org/wiki/Magnetostriction
| ranked in date | views | likes | Comments | ranked in country (#position) |
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| 2015-12-01 | 15,566 | 1,838 | 150 |
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