External mechanism to prevent irreversible damage to hardware components of a cellular phone (Mobile white knight)

摘要

A low cost external (case-like) air bag mechanism is proposed for protection of expensive fragile smartphones from severe hardware damage. This external helping mechanism is constructed by utilizing inbuilt accelerometer of a mobile phone interfaced with its internal microcontroller. A critical acceleration will be detected by the internal gyroscope of a phone, detecting free fall. Micro sharp sensors (External to the mobile, connected via Bluetooth to the internal microcontroller) are used to confirm the free fall of the device by calculating distance from the surface. This in turn will send an interrupt to the microcontroller and the cartridge (also external to the phone connected via Bluetooth) containing NaN3 (Sodium Nitrite), KNO3 (Potassium Nitrate) and SiO2 (Silicon Dioxide) will get stimulated and there is a chemical reaction between the three constituents. Inflating the external air bag present in the case-like structure and thus preventing direct contact of the mobile phone with hard surface. Fast and reliable responses, low power consumption are other attractive features of the proposed mobile white knight. The device will be incorporated as a mobile cover.