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TIDA-01377
Case Tamper Detection Reference Design Using Inductive Sensing
TIDA-01377
Overview
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 events
- Accurately detects case movement as small as 4mm
- Single inductive sensor detects opening of terminal block cover and main cover
- Consumes approximately 2 µA while sampling at 1Hz
- Immune to DC magnetic tampering
A fully assembled board has been developed for testing and performance validation only, and is not available for sale.
Design files & products
Design files
Download ready-to-use system files to speed your design process.
TIDUD41.PDF (7283 K)
Reference design overview and verified performance test data
TIDRRF4.PDF (65 K)
Detailed schematic diagram for design layout and components
TIDRRF5.ZIP (404 K)
Complete listing of design components, reference designators, and manufacturers/part numbers
TIDRRF7.ZIP (422 K)
Files used for 3D models or 2D drawings of IC components
TIDCDJ8.ZIP (446 K)
Design file that contains information on physical board layer of design PCB
TIDRRF6.ZIP (462 K)
PCB layer plot file used for generating PCB design layout
Products
Includes TI products in the design and potential alternatives.
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Technical documentation
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| Type | Title | Date | ||
|---|---|---|---|---|
| * | Design guide | Case Tamper Detection Reference Design Using Inductive Sensing | Jun. 05, 2017 | |
| 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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