Full temperature compensation ultrasonic heat meter
An ultrasonic and heat meter technology, applied in calorimeters, measuring heat, measuring devices, etc., can solve problems such as low service life of heat meters, thick coating, inaccurate heat measurement, etc., to improve flow compensation accuracy and accurate measurement Effect
Active Publication Date: 2017-01-25
NO 513 INST THE FIFTH INST OF CHINA AEROSPACE SCI & TECH +1
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Problems solved by technology
[0003] At present, there are problems with ultrasonic heat meters: poor consistency and repeatability of pipe sections; poor consistency and repeatability of transducers; ultrasonic heat meters generally only make national standards at high temperatures of about 85 degrees, about 50 degrees, and normal temperatures in the market CJ128-2007 accurate measurement of flow point; after 2-3 years of use, the phenomenon of inaccurate heat measurement is more serious
[0005] At present, the coating of the transducer material on the market is relatively thick. During the use of the heat meter, scale will accumulate on the surface of the transducer due to the influence of impurities and other particles in the water flow, which will eventually affect the accurate measurement of the ultrasonic heat meter. The service life is lower than the 6 years required by the national standard
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[0034] The present invention will be described in detail below with reference to the accompanying drawings and examples.
[0035] as attached figure 1 As shown, the present invention provides a full temperature compensation type ultrasonic heat meter, which includes MCU, time-to-digital converter TDC-GP21, LCD segment liquid crystal display, upstream transducer, downstream transducer, inlet The temperature sensor and the outlet temperature sensor use the MCU and the time-to-digital converter TDC-GP21 to collect the flow rate and temperature values, and obtain the heat value according to Q=C×M×△T, where Q is the heat consumed, C is the specific heat of water, M is the mass of water flowing through the pipe, and △T is the difference between the inlet water temperature and the outlet water temperature.
[0036] The MCU sends control commands to the time-to-digital converter TDC-GP21 through SPI, and receives the data output from the time-to-digital converter TDC-GP21, and at the...
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Abstract
The invention provides a total temperature compensating ultrasonic heat meter. The ultrasonic heat meter comprises an MCU (Main Control Unit), a time digital converter TDC-GP21, a segment LCD (Liquid Crystal Display) screen, an upstream energy converter, a downstream energy converter, an inlet temperature sensor and an outlet temperature sensor; the MCU transmits a control instruction to the time digital converter TDC-GP21 by virtue of an SPI (Serial Peripheral Interface) and receives data output by the time digital converter TDC-GP21, and also outputs the obtained data to the segment LCD screen for displaying; according to the control instruction from the MCU, data acquisition control instructions are sent to the upstream energy converter, the downstream energy converter, the inlet temperature sensor and the outlet temperature sensor, respectively, and meanwhile, the received data are processed to obtain a water flow velocity, a water inlet temperature value and a water outlet temperature value. The heat meter is capable of guaranteeing accurate measurement of flow and heat from 10 degrees to 90 degrees by use of ultrasonic waves; in addition, a smart low-power chip is adopted so that the service life of the heat meter can be increased.
Description
technical field [0001] The invention relates to a heat energy meter, in particular to a full temperature compensation type ultrasonic heat energy meter, which belongs to the technical field of intelligent data acquisition. Background technique [0002] Ultrasonic heat meter is a kind of heat measuring instrument designed and manufactured according to the principle that the ultrasonic water flow velocity is proportional to the difference between the ultrasonic propagation time in countercurrent water and the downstream propagation time. The ultrasonic heat meter mainly includes the following parts: the standard measurement installation pipe section, which is used to provide the installation environment of the ultrasonic transducer; Temperature measurement of outlet pipes; intelligent calculator: provide intelligent design of circuits and software for ultrasonic measurement. [0003] At present, there are problems with ultrasonic heat meters: poor consistency and repeatabilit...
Claims
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IPC IPC(8): G01K17/12
Inventor 王世程董伟刘福强刘磊
Owner NO 513 INST THE FIFTH INST OF CHINA AEROSPACE SCI & TECH