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.
A fully assembled board has been developed for testing and performance validation only, and is not available for sale.
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Reference design overview and verified performance test data
Complete listing of design components, reference designators, and manufacturers/part numbers
Files used for 3D models or 2D drawings of IC components
Design file that contains information on physical board layer of design PCB
PCB layer plot file used for generating PCB design layout
Detailed schematic diagram for design layout and components
Includes TI products in the design and potential alternatives.
| Type | Title | Date | ||
|---|---|---|---|---|
| * | Design guide | Case Tamper Detection Reference Design Using Inductive Sensing | Jun 5, 2017 | |
| Data sheet | LDC0851 Differential Inductive Switch datasheet (Rev. B) | PDF | HTML | Apr 16, 2024 | |
| Technical article | An open-and-shut case, part 2: advantages of inductive-based case tamper detection | PDF | HTML | Nov 29, 2018 | |
| Technical article | An open-and-shut case, part 1: limitations of mechanical case tamper detection in | PDF | HTML | Nov 15, 2018 |
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