Case Tamper Detection Reference Design Using Inductive Sensing
Description
The physical case surrounding a smart meter is the first line of defense against tampering. Smart meter designs must incorporate some way to detect when the meter case is opened in order to alert service providers to a possible tamper attack. This reference design implements a new method for the low-power detection of such tampering by using a small: inductive sensor to accurately and reliably determine if the meter case has been opened. This new solution improves system reliability by eliminating mechanical components which can wear out over time. This system is implemented for smart electricity meters but the design techniques can as well be applied to water :gas: and heat meters.
Features
- Contactless detection of case tampering eventsAccurately detects case movement as small as 4mmSingle inductive sensor detects opening of terminal block cover and main coverConsumes approximately 2 µA while sampling at 1HzImmune to DC magnetic tampering
Applications
- Electricity meter
- Water meter
- Gas meter
- Heat meter
- Data concentrators
- Power quality analyzer
Product Categories
- Sensors