ABSTRACT

Human body communication (HBC) is a short-range wireless communication in the vicinity of, or inside a human body by using the human body as a propagation medium. HBC is divided into two solutions: galvanic coupling and capacitive coupling. The former requires one pairs of electrodes in both the transmitter (TX) and the receiver (RX), whereas the latter only requires a single electrode for the TX and the RX. The capacitive coupling makes it possible to miniaturize the size of device, and is more suitable for applications requiring the devices to be miniature enough. Since HBC can transfer in high data rates while maintaining low power consumption, and provide high security and easy integration within body-worn devices, HBC shows great potential for wearable devices. Moreover, as the proportion of biological tissues such as muscle, fat, and skeleton is different between individuals, the overall dielectric constants of human body are diverse, as well as the signal propagated through human body. The diverse HBC propagation signal can be utilized as the biometric trait to authenticate individuals. By means of employing the HBC as both the authentication and the communication approaches, the size of wearable devices will be more miniature. Due to the use of propagation signal between devices, the HBC authentication is suitable for wearable device regardless of the location.

BLOCK DIAGRAM

HARDWARE REQUIREMENTS

• MICROCONTROLLER(PIC)
• ADC UNIT
• UART
• TEMPERATURE SENSOR
• HEART BEAT SENSOR
• RELAY UNIT
• LCD DISPLAY
• HBC TRANSMITTER
• HBC RECEIVER

SOFTWARE REQUIREMENTS

• EMBEDDED C
• KEIL COMPILER
• PROTEUS