DETECTION-SIGNAL TRANSMITTING APPARATUS
1 Assignment
0 Petitions
Accused Products
Abstract
To enable detection and transmission of an ultrasonic signal with a high S/N ratio without any need for a component requiring high machining precision or high precision in mounting a component.
In a dresser head 41, an ultrasonic sensor 21 detecting an ultrasonic wave is provided, and further provided are: a signal converting/transmitting circuit 23 converting a detected signal of the ultrasonic sensor 21 to a digital signal and subjecting the digital signal to radio modulation; and a signal transmission antenna 26 to which the signal resulting from the radio modulation by the signal converting/transmitting circuit 23 is applied. Further, near the dresser head 41, a signal reception antenna 34 receiving a signal emitted by the signal transmission antenna 26 and a signal reception head 35 demodulating the reception signal obtained by the signal reception antenna 26 are provided, and the demodulated signal is output as a digital signal or an analog signal in a predetermined signal format via a control part 31.
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Citations
10 Claims
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1-5. -5. (canceled)
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6. In a detection-signal transmitting apparatus detecting and transmitting an ultrasonic wave generated in a rotating body,
the apparatus including, in the rotating body: - an ultrasonic sensor detecting the ultrasonic wave;
an analog/digital converter converting a detected signal of the ultrasonic sensor to a digital signal;
a signal converting/transmitting circuit subjecting an output signal of the analog/digital converter to radio modulation;
a signal transmission antenna emitting the signal resulting from the radio modulation by the signal converting/transmitting circuit;
a power reception antenna receiving a power signal with a radio frequency transmitted from an external part; and
a rectifying circuit rectifying the signal obtained by the power reception antenna to supply power,the apparatus further comprising;
a signal reception antenna receiving the signal emitted from the signal transmission antenna;
a signal reception head performing demodulation and signal level conversion of the reception signal obtained by the signal reception antenna;
a power transmission head generating the power signal with the radio frequency;
a power transmission antenna emitting the power signal with the radio frequency applied from the power transmission head; and
a control part controlling operations of the signal reception head and the power transmission head and performing signal conversion,wherein the signal transmission antenna and the power reception antenna are each composed of a core member formed in an annular shape and a coil winding wound around the core member and are disposed in a stacked manner, and wherein the power transmission antenna is provided near an outer peripheral edge of the power reception antenna. - View Dependent Claims (7, 8, 9, 10)
- an ultrasonic sensor detecting the ultrasonic wave;
Specification