| 摘要 |
PURPOSE: A wireless communication control method and a system using a speaker connected to a computer system are provided to control external machines such as lamps, door locks, electronic devices, and so on without light emitting sensor or transmitter. CONSTITUTION: A computer system generates ultrasonic waves. An external machines receives the ultrasonic waves. The external machine(30) consists of a receiving part to receive the ultrasonic waves, a processing part to process the signal, a saving part to store the signal, an operation part to operate the machine, and an input part to input control commands. The computer system(10) consists of a body(12), which has a mother board(6) and a communication modem, a buzzer or a speaker, and display devices. A buzzer(13) generates ultrasonic waves using an intensity modulation method. The user connects the computer using the Internet, generates ultrasonic sound using the speaker or the buzzer in the computer and controls the external electronic devices, which has the receiving device. |
