Home Intelligent Light Positioning

Earlier today I read J. Yonkov’s plans to work on sound triangulation project. I know nothing of sound waves and the math around them, I am afraid, but his project gave me a great idea I have expanded in home automation project I boastfully call HOME INTELLIGENT LIGHT POSITIONING.

HILP consists of the following elements:

  • Home Light Device, attached to the ceiling of a room, with 2-4 LED lights capable of emitting different color lights and attached to motors allowing automated 360 degree rotation and positioning. The Home Light Device is wired or connected wirelessly to Sound Sensors (see below), and contains grid-powered WiFi adapter for WiFi connection to home router, Bluetooth radio chip, mobile/miniature screenless computer device using web interface accessible through any screen-based web-device throughout the house, or specialized remotes.
  • Sound Sensors. Spatial stereo microphones located in the corners of the room. The purpose of the sound sensors is to constantly record the sound in the room, react to sound commands and triangulate the positio of the sound source depending on the strength of the sound and the speed of sound reaches the sensors. Sound sensors are connected either wired or wirelessly to the Home Light Device. Home Light Device supports connection with as many Sound Sensors as possible – the more sensors, the more complex and precise is the sound source positioning.

Purposes of HILP:

  • John wakes up in the middle of the night. “Lights on me!”, he commands. Sound Sensors catch his voice, triangulates his position and one of the LED lights rotates and casts light straight on him.
  • John wants dim light to cast on the beautiful picture on the wall through the night. He walks to the picture and speaks, “Light Remember Position: Picture”. His position is remembered as “Picture” and LED light casts on him. “Set Picture to Dim”, says John. HILP remembers a property of “Picture” is Dim light. John goes to bed. “Lights on Picture”, he commands. HILP turns towards the Picture and casts dim light on it.
  • John has lost his phone somewhere in his home. “Lights Find My Phone”. HILP sends a free SMS to his phone via its WiFi connection. John’s phone emits the sound for SMS. HILP is programmed to trinagulate and cast red LED light on device that emits SMS alarm. HILP casts red light on a bunch of dirty socks; John’s phone is right under them.
  • HILP can record and log sound recordings in a room. It’s a perfect Big Brother device for a family in privacy denial or lifecasting. John lives alone and he’d rather speak his startup ideas out loud while in bed, without reaching his voice recorder. Because HILP has 1Gb of memory for sound buffering, John has the last 48 hours into 30-minute voice recordings cached into internal memory or immediately FTP’d or Network saved to his private server. “Lights, Save 60 minutes of recording.”, John says after speaking aloud to himself. HILP digs into buffered sound, builds a 60-minute audio file, names it according to command timedate and saves it to a /Saved folder on John’s FTP or NAS drive.
  • John is exhausted and he falls asleep, and lets say he doesn’t snore. HILP is programmed to compare lack of sound with time of 22:00 as sleep time. HILP will slowly dim the lights until sleep mode of full darkness or directed light in exact position(s) is reached.
  • John wakes up with a scream in the middle of the night. Immediate sound in the night could mean light is immedately cast in that direction. What if John did not wake HILP but a robber who made a loud step into the room?