Magic sensor. Technician monitoring an autonomous sensor on a candle. This long-lived sensor is powered solely by the changes in temperature it measures,requiring no battery. It is only active when there is a change to measure. Here,it is acting as a safety device. Voltage is generated in its pyroelectric materials by changes in tempera- ture. The voltage is converted into a radio signal transmitted by an antenna. This data can be picked up by a receiver up to 20 metres away. Similar sensors can be used to continuously check the pressure of vehicle tyres. The sensor was developed by Siemens,Munich-Perlach,Germany | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Steger, Volker / Siemens |
Bildgröße: | 5879 px × 4303 px |
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Eigentums-Rechte: | nicht erforderlich |
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