Patent ID: 8830817

Claim:
A path multiplexing apparatus in a wireless sensor network comprising: a master apparatus; a slave apparatus; and a control module, wherein the control module selectively transmits any one of data supplied by the master apparatus and the slave apparatus to a next system according to control signals supplied by the master apparatus and the slave apparatus, wherein in an activated state during normal operation, the master apparatus supplies a control signal for allowing data of the master apparatus to be output and monitors an operation state of the slave apparatus, and in the case where the slave apparatus abnormally operates, the master apparatus supplies a reset signal to the slave apparatus, wherein in an inactivated state during normal operation, the slave apparatus monitors an operation state of the master apparatus, and in the case where the master apparatus abnormally operates, the slave apparatus is transitioned into an activated state to supply a reset signal to the master apparatus and supply a control signal for allowing data of the slave apparatus to be output to the control module, wherein the control module is configured to include: a JK flip-flop which receives control signals from the master apparatus and the slave apparatus as an input and generates a selection signal according to the control signals; and a MUX which is supplied with data from the master apparatus and the slave apparatus to selectively output one of two signals according to the selection signal, wherein the control signals supplied by the master apparatus are input to a K port and a /CLR port of the JK flip-flop, wherein the control signals supplied by the slave apparatus are input to a J port and a /PRE port of the JK flip-flop, wherein in the case where the master apparatus is activated and the slave apparatus is inactivated, the control signals input to the J port, the K port, the /PRE port, and the /CLR port and L, H, H, and H signals, and wherein in the case where the master apparatus is inactivated and the slave apparatus is activated, the control signals input to the J port, the K port, the /PRE port, and the /CLR port are H, L, H, and H signals.