INDUCTIVE SENSOR OF TACHOMETRIC LIQUID METRE Russian patent published in 2017 - IPC G01F1/115 

FIELD: measuring equipment.

SUBSTANCE: inductive sensor of the tachometric liquid metre contains a sensing element in the form of an inductance coil (1) located in the tube (2), which is plugged on one side at its end. The end of the tube (2) is located near the target (4) fixed to the turbine (3). The inductance coil (1) is connected by a cable (5) to the tuned-circuit capacitor (6), connected to the microcontroller (7). The turbine (3) is rotatably mounted in the bearing assemblies (8) located in the guides (9) of the liquid flow metre body (10). The tuned-circuit capacitor (6) is connected to the microcontroller (7) located on the electronic board of the inductive sensor device (11), which is hermetically fixed to the body of the liquid flow metre (10). The turbine (3) consists of two sections: a section with blades (12) and a cylindrical section (13) with the target (4). The target (4) is made of a flat ferromagnetic material, curved and fixed along the radius of the cylindrical part of the turbine (13). A flat pattern of the target (in plan) is made in the form of three identical rectangles (14) connected by two thin bridges of different lengths (15) and (16).

EFFECT: simplified design of the inductive sensor and operation method, increased reliability of the device on the whole.

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