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This paper introduces a shock sensor design that requires zero power, is small, low cost, and can be remotely monitored. The sensor combines a latching accelerometer with a Radio Frequency Identification (RFID) chip. The accelerometer is a mechanical element that changes states when threshold acceleration is met. The element's state can be relayed wirelessly to an electronic reader via the RFID chip...
This paper presents the design, manufacture, and testing of a battery-free, wireless threshold accelerometer based on a fully compliant bistable mechanism (FCBM). The FCBM stores threshold acceleration measurements mechanically, eliminating the need for electrical power. The sensorpsilas state can be read wirelessly via a passive RFID tag. Because information can be stored in these tags for over 25...
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