Method for obtaining circuit delay time in ultrasonic measuring device

A technology of circuit delay and measurement device, applied in the field of ultrasonic measurement, can solve the problem of inability to obtain the propagation time of ultrasonic signals
CN101644776AInactive Publication Date: 2010-02-10NINGBO UNIV +1
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
NINGBO UNIV
Publication Date
2010-02-10
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a method for obtaining circuit delay time in an ultrasonic measuring device. The method has the following advantages of: by using the characteristic that a first ultrasonic energy converter and a second ultrasonic energy converter can send an ultrasonic signal and receive the ultrasonic signal, controlling the switching on and the switching off among four ports of a selector switch by a controller; realizing the sending and the receiving of the ultrasonic signals with five different modes; and respectively obtaining five different total times by a timer; and obtaining the circuit delay time by combining with the format of the each total time through the minimum square law, thereby being capable of obtaining the propagation time of the ultrasonic signal in physical medium. Furthermore, the method has simple computing process and more accurate circuit delay time.
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Description

technical field

[0001] The invention relates to an ultrasonic measurement technology, in particular to a method for obtaining circuit delay time in an ultrasonic measurement device. Background technique

[0002] Ultrasonic rangefinders, ultrasonic flowmeters, etc. are currently commonly used ultrasonic measuring devices. Ultrasonic rangefinders send out ultrasonic signals through the transmitting transducer and are reflected by obstacles, received by the receiving transducer, and propagated in the medium by the ultrasonic signal The distance between the ultrasonic distance meter and the obstacle can be calculated by the time of this period and the speed of the ultrasonic wave in the medium; the ultrasonic flowmeter mainly calculates the instantaneous flow by obtaining the liquid flow velocity in the pipeline, so as to achieve the purpose of flow measurement, and The flow velocity of the liquid in the pipeline is obtained by indirect calculation of the propagation time of the...

Claims

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