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|국가/구분||United States(US) Patent 등록|
|발명자 / 주소|
|출원인 / 주소|
|인용정보||피인용 횟수 : 4 인용 특허 : 3|
An ultrasonic Doppler flowmeter in which a received signal processing part includes a reference signal generator for generating a reference signal corresponding to the magnitude of a received signal, and a comparator for comparing the received signal with the reference signal. The reference signal varies in accordance with the magnitude of the received signal, and further may possess a hysteresis width corresponding to the output of the comparator. Therefore, a noise signal is effectively removed from the received signal at the comparator, and only a Dop...
An ultrasonic Doppler flowmeter comprising: transmitting means for transmitting an ultrasonic wave of a fixed frequency into a fluid flow to be measured; receiving means for receiving a reflected ultrasonic wave from said fluid; and signal processing means including a reference signal generator and a comparator, said reference signal generator generating a reference signal upon reception of a received signal from said receiving means in accordance with the magnitude of the received signal, said comparator being supplied with said received signal and said...