System for transmitting a signal
First Claim
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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.
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Abstract
A magnetostrictive element generates an ultrasonic wave and the generated ultrasonic wave is propagated through a propagation medium. An acoustic wave receiver receives the propagated ultrasonic wave at the other end of the propagation medium and converts it into an electric signal. A signal transmission is carried out in this way.
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Citations
25 Claims
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1. A system for transmitting a signal, comprising:
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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 Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A method of transmitting a signal, comprising the steps of:
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supplying a voltage; selectively transmitting the voltage through a switching circuit; transforming the selectively transmitted voltage from an initial value to a higher value; rectifying the higher value voltage; storing the rectified higher value voltage in a storage capacitor; controlling the voltage level of the rectified higher value voltage; selectively transmitting the stored voltage to a magnetostrictive element an exciting current to generate a signal sound; propagating the signal sound through a rodlike body; and receiving the signal sound by an acoustic wave receiver disposed in a predetermined position of said rodlike body. - View Dependent Claims (21, 22, 23, 24, 25)
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Specification