Ultrasonic current meter
An ultrasonic and tachometer technology, which is used in fluid velocity measurement, flow rate/mass flow measurement, liquid/fluid solid measurement, etc., and can solve problems such as increasing the number of parts, increasing costs, and increasing power consumption.
Inactive Publication Date: 2004-06-30
TOKIMEC INC
View PDF1 Cites 13 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
However, in the case of applying such a continuous wave, at least two ultrasonic probes for transmission and four ultrasonic probes for reception are required in total, so the number of parts increases, the size of the device tends to increase, and the cost In addition, there is a problem that power consumption increases due to continuous transmission and reception
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0049] Embodiments of the present invention will be described below using the drawings. Fig. 1 is a block diagram of an ultrasonic flowmeter of the present invention.
[0050] In the figure, the ultrasonic current meter 10 of the present invention is generally equipped with a burst signal generator 110 that generates two kinds of burst signals with a phase difference; a pair of ultrasonic probe heads 6, 7 for transmitting and receiving; The binarization unit 112 that binarizes the received signals respectively; the phase difference measurement unit 116 that obtains the phase difference of the received signals that have been binarized respectively; the ultrasonic propagation time measurement unit 117; based on the phase difference signal from the phase difference measurement unit 116 A flow velocity measuring unit 118 for measuring the flow velocity and flow rate of the fluid. A pair of ultrasonic probes 6 and 7 for transmission and reception are attached to a pipe 8 through w...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The present invention provides a small, low power consumption ultrasonic flow velocity meter. The burst signal generation section 110 generates two kinds of burst signals with a phase difference and sends these burst signals to a pair of transmission / reception ultrasonic transducers 6 and 7 located on the upstream side and downstream side of the conduit to be measured 9. Upon reception of the corresponding burst signals, the pair of the transmission / reception ultrasonic transducers 6 and 7 convert the burst signals, send ultrasonic waves with a phase difference to the conduit to be measured 9, receive the ultrasonic wave sent by the other transmission / reception ultrasonic transducer and propagated through the conduit to be measured and convert the ultrasonic waves to received signals. These received signals are binarized through the binarization circuits 16 and 17, exclusive-ORed by the exclusive-OR circuit 30 and converted to a phase difference signal indicating a phase difference and the flow velocity of the conduit to be measured 9 is measured based on this phase difference signal.
Description
technical field [0001] The present invention relates to an ultrasonic flow meter for measuring fluid flow velocity based on a difference in propagation time of ultrasonic waves. Background technique [0002] Conventionally, as an ultrasonic flowmeter using such an ultrasonic flowmeter, for example, an ultrasonic flowmeter of a propagation time difference method is known. In this type of flow meter, the ultrasonic probes are respectively arranged on the upstream side and the downstream side of the fluid to be measured, and a pulse signal or a step signal is used as a transmission signal, and the two ultrasonic probes on the upstream side and the downstream side alternately Ultrasonic waves are sent out, and the propagation time difference of the received signal is measured by a high-speed counter circuit. [0003] However, in such an ultrasonic flowmeter of the propagation time difference method, in order to accurately obtain the propagation time difference, the signal-to-no...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): G01F1/66G01P5/24
CPCG01F1/667G01P5/245
Inventor 岸本雅夫茂木良平铃木由起彦岩渕博
Owner TOKIMEC INC