Vision

Parents will sleep more peacefully thanks to Angee. They will be advised in case the baby is sleeping in dangerous positions through an alarm clock. Moreover if the baby starts crying the system will produce sweet sounds or project lights in order to calm the baby. In fact these functions can be also activated by parents during the day if they has to do little activities in the house and cannot keep an eye on him for few minutes. In short the system will alarm the parents providing relevant information (according to the context),detect baby's position and soothe crying baby’s, contributing to an overall safer and calmer environment.

Purpose and Scope

Angee it's a system that exploits a set of sensors, which are able to detect if the baby is in dangerous position and if the baby is crying, placed on the cradle of the baby and a set of actuators that tries to calm him/her down during day and night. The calming part is composed of projection and music. If the system is not able to tranquillize him/her or he/she is in the wrong position the user is advised through a notification on his phone. The user can disable some calming functionalities.

AmI steps

AmI step	Description
Sensing	sound sensor to check the baby's cry, cameras
Reasoning	recognize baby position, if he/she is crying/in danger
Acting	calm the baby with projector and sounds; alarm the mother if the baby is in danger
Interacting	the mother can enable/disable the projector/sounds

AmI feature	Description
Sensitive	able to sense baby's problem (see above)
Responsive	Able to respond to the needs of the baby and to act on the environment
Adaptive	the system is able to understand if the baby is crying => calm the baby, if he is in danger=> alert the mother
Transparent	The system behaves in an "embeded" way. The user does not have to know the details of the implementation to use it.
Ubiquitous	sensors are in the room and collaborate to analyze the problem
Intelligent	(see open issues)

Actors

USER: the tutor of the baby (parents in general)
BABY: the newborn in the cradle

Glossary

Not visible: we assume that the baby’s face is covered (for example: baby on tummy with the face against the sheets) or baby outside cradle.
user: the tutor of the baby (parents in general)
projector: a simple system of lights and shadows

Non Functional Requirements

Non Functional area	title	description	area
NFR1	Compatbility	All the code of the project is open source.	Usability
NFR2	Language	The system will communicate in English	Usability
NFR3	Distance	The sound machine is at least a foot (30 centimeters) away from the child's head.	Safety
NFR4	Sounds	The sound machine should produce low-pitched sounds.	Safety
NFR5	Electricity	the system must be plugged in	Efficiency
NFR6	Supported system	the system supports smartphones	Usability
NFR7	Where	the system can be used in every room of the house as the product can be transported	Portability
NFR8	Color	The LED color projected at night should not be blue	Safety

Open Issues

forsee how the baby will react to the system
make the system understand that some sounds/videos calm the baby more than others in order to reuse baby's favourite more often
implement a mechanical system of rotating toys to entertain the baby
do an application in order to enable/disable calming functionalities

Study/References:

Cry detection: A baby's own cry is 10 times louder than a hair dryer.
CNN,edition.cnn.com/2014/03/03/health/noise-machines-study/
What light colors will calm down a baby?
Don’t use blue light at night.Some flurescent lights are sold with coatings that can shift the color away from blue wavelengths.
Use dim red lights for night lights. Red light has the least power to shift circadian rhythm and suppress melatonin.
Harvard, health.harvard.edu/staying-healthy/blue-light-has-a-dark-side
What musics will calm down a baby?
The sound machine can not go higher than 75 Db. Around 65 to 75.
sciencenews.org/blog/growth-curve/should-you-hush-white-noise
The sound machine at least a foot (30 centimeters) away from the child's head.
Dr. Harvey Karp, edition.cnn.com/2014/03/03/health/noise-machines-study/ Use low pitched sounds
CNN, edition.cnn.com/2014/03/03/health/noise-machines-study/
Low pitch rumbly sounds are better for a baby's sleep but for promoting sleep, he says, aim for softer and lower-pitched.
CNN, edition.cnn.com/2014/03/03/health/noise-machines-study/
Links: webmd.com/parenting/baby/news/20051011/new-techniques-to-calm-crying-baby

Hardware architecture

All the communications and decisions go through a Raspberry pi device, our one and only computational node.

Sensors/Actuators:

Cameras are located over the cradle, in order to see if the baby’s face is visible, the video streaming is sent to Raspberry.
Microphone is located near the baby’s head, in order to stream the sounds to Raspberry that will calculate if the baby is crying.
Speaker is located near the cradle and it’s controlled by Raspberry.
Lights are located next to the cradle, projecting shapes to the ceiling in colours controlled by Raspberry.

User interface and devices :

Instapush on the mobile phone where the user, connected with the local server, recives notifications.

Hardware components

Sound audiocontroler, HEXIN
Multimedia Microphone, ewent
Phillips Hue, Phillips
Raspberry Pi 3 Model B, Raspberry
Raspberry camera module, Raspberry
USB Camera, CREATIVE
Sound speakers, Goal Zero
1 breadboard, 2 330 ohm resistors, 2 led diodes, 2 switch, connectors

Software architecture

Software	Purpose	Location
Instapush	send alarms to the user and is connected to the Raspberry	Smarthphone
Facial Recognition	elaborate the data from the cameras	Raspberry
DB calculator	calculate the power in db of the signal received from the microphone	Raspberry
LED controller	set specific colors acording to the data retrieved from the microphone and cameras	Raspberry
General Controller	gathers all the data and is responsible to send alarms via the local server to the mobile application	Raspberry

Software components

All the following libraries are implemented using Python:
Instapush version 1.0.7
Control the LED using Philips Hue API / Rest Communication with the hue Bridge via Phue library.
Facial recognition/Image manipulation via OpenCV 2.4.13 library.
Decibels calculator via Analyse 1.0.0 and Pyaudio 0.2.8 libraries.
We also use: RPi.GPIO 0.5.11 to control the pins;
Pycurl 7.19.5.1 and StringIO 7.5 to interract with Instapush;
Requests 2.7.0 to control the light;
Numpy 1.11.0, Thread 4.5.0 and time 15.3 to create the code.