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Acoustic Door Latch Detector

Savannah River National Laboratory

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Technology Marketing SummaryA "smart" door lock for industrial and consumer applications has been developed by researchers at Savannah River Nuclear Solution's Savannah River National Laboratory (SRNL).  This technology uses existing state-of-the-art neural network technology to acoustically monitor lock performance and in particular the latching event.Description

As an inexpensive, battery-powered, stand-alone device or as integrated into any standard consumer lockset, the device instantaneously analyzes the acoustic signatures associated with normal door operation and generates an alert, if a door is not latched correctly and within a set amount of time.  It is not easily spoofed or defeated.  Physically the technology and battery would occupy approximately one cubic inch of space, and therefore could be easily integrated into many existing lockset designs.  Depending on several factors, battery life should be about 5 years.

Installation, setup, and use are simple. For the lockset version of the technology, installation is essentially the same as any off-the-shelf lockset, and requires only standard tools.  Once in place the user presses a concealed button and twice closes the door in a normal fashion.  The lockset then stores these signatures in memory and flashes (or beeps) indicating successful training.  Installation and set up are then complete.  In normal use the device is transparent, however if the door remains open for too long or is not properly latched, an audible and/or visual alarm is generated.

  • detects complex acoustic signature of a properly closed door
  • simple installation, setup, and use
  • stand alone device or can be integrated into any standard consumer lockset
  • device transparent in normal use
  • not easily spoofed or defeated
Applications and Industries

SmartLatchTM is a compelling product for households with children, elderly, or high traffic areas such as an office where a properly closed and latched door is essential for security and safety.

Technology Status
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To: Dale K. Haas<>