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Piezoelectric fluidic heat meter

A heat meter and piezoelectric technology, applied in the field of heat meters, can solve the problems of unsatisfactory measurement of high-temperature hot water with low flow rate, low frequency of oscillation signal, and difficulty in detection, etc., and achieve good flow lower limit performance and low working current , the effect of accurate measurement

Inactive Publication Date: 2010-01-06
ZHEJIANG UNIV
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Problems solved by technology

However, the performance of several existing jet flowmeters is unsatisfactory in measuring low-velocity high-temperature hot water, and this is precisely the difficulty in designing jet heat meters
[0004] The frequency of the oscillation signal generated by the jet heat meter at low flow rate is very low, the amplitude is also very small, it is difficult to detect, and, because the heat meter is a household instrument, the cost is also an important consideration factor

Method used

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  • Piezoelectric fluidic heat meter
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Embodiment Construction

[0020] The purpose and effects of the present invention will become more apparent by referring to the accompanying drawings in detail of the present invention.

[0021] Such as figure 1 As shown, the piezoelectric jet heat meter of the present invention includes a jet base meter and a detection circuit. The jet-based meter includes a rectangular baffle 1 , a first feedback channel 2 , a second feedback channel 3 , a first piezoelectric sensor 4 , and a second piezoelectric sensor 5 . The rectangular baffle 1 is fixed in the measuring tube of the jet-based meter, the first piezoelectric sensor 4 is installed in the first feedback channel 2, the second piezoelectric sensor 5 is installed in the second feedback channel 3, and the installation positions of the two piezoelectric sensors are Symmetrical about the axis position of the jet base table. From the results of simulation and experiments, it can be known that the installation position of the piezoelectric sensor as shown i...

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Abstract

The invention discloses a piezoelectric fluidic heat meter, in particular to a fluidic heat meter made of engineering plastic polyphenylene oxide (PPO). A flow choking part is installed in a measuring tube of the fluidic heat meter, two piezoelectric sensors are installed in feedback channels at both sides of the measuring tube and are connected to the input end of a differential amplification circuit, and the output end of the differential amplification circuit is sequentially connected to a comparator circuit and a singlechip circuit. The microcontroller circuit also provides circuits, such as an LCD display circuit, an infrared communication circuit, a temperature measurement circuit, and the like. A whole circuit uses one battery to supply power. The fluidic heat meter has the advantages of low power consumption, wide measuring range, free maintenance, high reliability, high accuracy, and the like.

Description

technical field [0001] The invention relates to a heat meter, in particular to a heat meter based on a piezoelectric jet flowmeter. Background technique [0002] Calorie measurement is an important scientific measurement content, and it is also a technical means for the country to realize charging according to actual measurement. It plays an important role in trade settlement, energy measurement, process control, and environmental protection. In recent years, with the global shortage of energy and the increasingly serious environmental pollution, the country has higher and higher requirements for heat metering. At present, heat measuring instruments mainly include ordinary mechanical hot water meters and ultrasonic flow meters plus temperature measurement modules. Mechanical water meters and ultrasonic flow meters have their own characteristics. Mechanical water meters are widely used at home and abroad for their simple structure, stable measurement, and low price. to the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01K17/12G01K17/16G01F1/56G01K7/24
Inventor 戴华平陆秋平石焕
Owner ZHEJIANG UNIV
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