Ultrasonic wave transmitting and receiving apparatus
AssigneeTokyo Shibaura Electric Co., Ltd.
InventorsKazuhiro Iinuma, Kinya Takamizawa
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Abstract
There are provided a transmitter for transmitting an ultrasonic wave pulse having a definite period toward an object to be examined, a receiver for receiving the ultrasonic wave pulse reflected by the object to produce a corresponding electric signal, a switch for selectively passing the electric signal produced by the receiver, a plurality of delay elements having different delay times and connected to receive the electric signal passing through the switch, and adders for adding the output signals of the delay elements after applying a predetermined weight thereto.
Claims8
An ultrasonic wave transmitting and receiving apparatus comprising transmitting means including a plurality of electro-acoustic transducing elements for transmitting ultrasonic wave pulses having a definite period toward an object to be examined, receiving means arranged to receive ultrasonic wave pulses reflected by said object through said electro-acoustic transducing elements for producing corresponding electric signals, switch means having an ON-OFF state including a switch control means for controlling the ON-OFF state of the switch means for selectively passing a predetermined part of said electric signals produced by said receiving means, and a signal converting circuit including a plurality of delay circuits for dividing the electric signals passing through said switch means into a plurality of signals and for applying a predetermined weight of delay times to said divided signals and means for adding together the outputs from said delay circuits at a predetermined ratio and combination.
Dependencies are inferred from the claim text.