Ultra-low-power-consumption intelligent-control high-precision ultrasonic heat meter

Abstract

The invention discloses an ultra-low-power-consumption intelligent-control high-precision ultrasonic heat meter which comprises an ultrasonic heat meter and a main controller. The ultrasonic heat meter comprises a meter body, a support, a measuring pipe, reflecting mirrors, an energy converter and an integrator. The support is installed in the meter body, the measuring pipe is installed in the support, the reflecting mirrors connected with the support are located at two ends of the measuring pipe, the energy converter is arranged in the meter body relative to the upper portions of the reflecting mirrors, a meter box seat is arranged on a dial plate at the top end of the meter body, and the integrator with a heat meter probe is hinged to one side of the meter box seat. The main controller is an MSP430F413 single chip microcomputer, and is provided with a power module, a button control module, a storage module, a read-write card module, an infrared communication module, a microprogrammed control unit (MCU) processing control module, a Wiegand signal collecting module and a liquid crystal display module. The ultra-low-power-consumption intelligent-control high-precision ultrasonic heat meter has the advantages of being small in size, low in power consumption and high in accuracy.

Description

technical field [0001] The invention relates to the technical field of metering instruments, in particular to a novel household ultra-low power consumption intelligent control high-precision ultrasonic heat meter for housing unit heating. Background technique [0002] At present, the existing prior art closest to the present invention is an ultrasonic calorimeter disclosed by Tianjin Jinfeng Technology Development Co., Ltd. (utility model patent). The watch includes a watch body, a reflector, a first transducer arranged at the receiving port of the watch body and a second transducer arranged at the emitting port of the watch body, a circular opening is arranged in the middle of the top of the watch body, and the reflection The sheet is fixed at the circular opening by bolts, and one side of the reflective surface of the reflective sheet extends into the body of the watch. By screwing the reflector to the circular opening in the middle of the top of the meter body, when the ...

AI Technical Summary

Problems solved by technology

[0007] At present, due to design defects, the ultrasonic heat meters on the domestic market often cause pressure increase and blockage, and the large error of accessories affects the accuracy of measurement; most of the phenotypes generally use different numerical sampling intervals for verification and working state flow signals Time (usually 1-2 seconds in the verification state, and 30-60 seconds in the working state)

This long-term "sleep" working mode is designed on the assumption that the flow rate of the heat transfer fluid during the "sleep" period is stable and unchanging as the working principle. Obviously, this assumption is quite different from the actual working conditions. , at the cost of sacrificing the accuracy of the meter; the sampling interval is designed as two different states (verification state and working state), which conceals the uncertainty of measurement accuracy brought by this working mode to the performance of the meter. It also avoids the risk of being certified, and the design of the working mode as a measuring instrument for trade settlement is very inappropriate, because it cuts off the traceability of the measurement standard, which is contrary to the measurement laws and regulations; some enterprises Ultrasonic heat meters mostly use the time-of-flight method to detect the flow velocity of the heat-carrying fluid with single-channel ultrasonic waves. It only samples and detects the flow velocity (point velocity sampling) at the part where the ultrasonic beam passes through the flow velocity field, replacing the flow velocity of the entire flow velocity field. Therefore, this The assumption of the sampling mode of detecting flow velocity by point instead of surface is that the entire flow velocity field is uniform and stable on a cross-section. Obviously, this kind of working state is only possible on the verification device, and the field conditions are not very good. Possibly, this causes a great deviation when the ultrasonic heat meter is used in the field to detect the average flow velocity of the flow field, thus laying a hidden danger for the quality of the ultrasonic heat meter used in the field; the water quality of domestic central heating is relatively special, Not only the "hardness" is high, it is easy to scale at high temperature, but also there are various granular impurities (such as magnetized particles, iron scrap impurities, etc.), a small amount of air bubbles, and even "floc" and other pollutants

Under such a relatively special status of central heating water quality, the heat meters currently used in central heating installations (more than 90% are ultrasonic heat meters of various types), due to some fatal quality risks, there have been large Area Durability Reliability Quality Issues

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