×

System for transmitting a signal

  • US 5,568,448 A
  • Filed: 08/29/1994
  • Issued: 10/22/1996
  • Est. Priority Date: 04/25/1994
  • Status: Expired due to Fees
First Claim
Patent Images

1. A system for transmitting a signal, comprising:

  • a magnetostrictive element having magnetostrictive material for producing magnetostriction and an excitation winding around the magnetostrictive material;

    a magnetostriction generation control device for driving said magnetostrictive element, said magnetostriction generation control device including a power supply for supplying a voltage, a high-frequency switching circuit for selectively transmitting the voltage, a transformer for transforming the selectively transmitted voltage from an initial value to a higher value, a second rectifier for rectifying the higher value voltage, a waveform-smoothing capacitor for storing the rectified higher value voltage, a constant voltage control circuit for controlling a voltage level of the rectified higher value voltage, a switching means for selectively transmitting the stored voltage to the magnetostrictive element as an exciting current, and a switching control circuit for controlling a switching time of the switching means;

    a rodlike body for transmitting a signal wave generated by said magnetostrictive element; and

    an acoustic wave receiver disposed in a predetermined position of said rodlike body, for receiving said signal wave propagated through said rodlike body, converting the received signal wave into a converted signal and outputting the converted signal.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×