A liquid flow sensor

Abstract

The invention relates to a liquid flow rate sensor, which includes a rigid circuit board with a hollow structure and a stress sensor; the stress sensor includes a plurality of conductive fiber bundles, and the plurality of conductive fiber bundles are crossed and stacked on the rigid circuit board. Multiple cross-junction structures are formed on the hollow structure of the rigid circuit board; the stress sensor is connected with two wires extending outward. The invention has the advantages of small volume, high sensitivity, being able to be built into the pipeline, and the like.

Description

technical field [0001] The invention relates to the technical field of sensor equipment, in particular to a liquid flow rate sensor. Background technique [0002] With the development of science and technology and the progress of society, people gradually pay more and more attention to the effective use of water resources. However, the pollution and waste of water resources in the biosphere have caused water resources to decrease day by day. Water saving is the key to achieving a sustainable society. A permanent topic of development. In order to achieve the purpose of saving water resources, it is necessary to monitor the water flow rate accurately, in real time, and with high sensitivity, so as to solve the problem of leaking water from water pipes. [0003] At present, the sensing method for water velocity mainly relies on the use of liquid flowmeters. However, most of the traditional water flowmeters are turbine-type. This kind of flowmeter is based on Faraday's law of e...

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Problems solved by technology

Similarly, because of its working principle, the turbine-type water flow meter has a great locality: on the one hand, it is impossible to choose materials that are easy to magnetize and have magnetism, such as stainless steel, resulting in high cost of the flow meter; on the other hand On the one hand, the machining precision of the impeller is high structurally, and the rotation direction of the impeller is fixed. If the direction of water flow changes, the water velocity meter cannot be used or even damaged.

In addition, the turbine-type water flow meter is a connection design. If the flow meter is installed on the existing pipeline, the pipeline needs to be cut to a suitable length, which greatly increases the difficulty of construction.

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