Description
The utility model relates to the field of ultrasonic heat meter flowmeters, in particular to an ultrasonic heat meter flowmeter for filtering interference signals.
Background of the invention
In the traditional ultrasonic heat meter flowmeter, the propagation of the ultrasonic signal needs to be reflected by the wall surface. If the wall surface of the flowmeter is fouled, the wall reflection characteristics will be changed, thereby changing the propagation characteristics of the ultrasonic heat meter signal and affecting the measurement. There is also an ultrasonic flowmeter whose ultrasonic signal propagates through the reflection of the reflective sheet during operation. No matter which kind of flowmeter ultrasonic signal is propagating, there will be some non-linear propagating signal (hereinafter referred to as interference signal). This signal will be reflected by the smooth inner wall to the receiving end, and the receiving end will measure the received interference signal. Therefore, the interference signal has a certain influence on the measurement of the flow rate under the normal working state of the heat meter, thereby causing the heat meter to be inaccurately measured.
Summary of the invention
The purpose of the utility model is to overcome the above problems existing in the prior art, and to provide an ultrasonic heat meter flow meter for filtering interference signals, which can effectively filter out interference signals and improve the accuracy of measurement results.
Figure is a longitudinal section of the utility model
In order to achieve the above technical purpose, to achieve the above technical effects, the utility model is realized by the following technical solutions: an ultrasonic heat meter flow meter for filtering interference signals, including a flow meter body, a transducer, a reflection sheet, and the flow rate The inside of the meter body is a hollow test channel, and the filter channel is provided with a filter ring, the body of the filter ring is a honeycomb structure, and the two ends of the test channel are respectively a water inlet and a water outlet, and the test channel A transducer mounting hole for mounting a transducer is disposed above the two ports, and each of the test channels is provided with a reflection sheet, and the reflection sheet is fixedly mounted on the inner side of the flow meter body through the mounting bracket. The outer diameter of the filter ring is less than or equal to the inner diameter of the test channel, and the filter ring is provided with a plurality of and uneven distribution. Any surface of the filter ring is provided with a plurality of honeycomb holes. The acute angle between the reflective sheet and the central axis of the test channel is 45 degrees. External threads at both ends of the flow meter body are provided with external threads for screwing with the water pipe.
The utility model has the beneficial effects that: the filter noise ring disposed in the test channel can block the interference signal reflected by the inner wall of the test pipeline, and ensure that the transducer located at the receiving end does not receive the interference signal. Improve the accuracy of the measurement results.
Article link: China Instrument Network http://
Residual Current Circuit Breaker With Over Load Protection
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