Weighing water level gauge

Abstract

The invention discloses a weighing water level gauge which comprises an amphibious coaxial shaft, a sensing unit for measuring the buoyancy of the amphibious coaxial shaft, a case and a supporting pile. The case is arranged at the upper end of the supporting pile; a first magnetic steel is arranged in the case; a cross beam is arranged at the lower end of the supporting pile and is provided with a fourth magnetic steel; a shaft hole is arranged at the lower end of the case; the amphibious coaxial shaft passes through the shaft hole and does not contact the hole wall of the shaft hole; the upper end of the amphibious coaxial shaft is arranged in the case and contacts the bottom of the case; a contact face of the amphibious coaxial shaft with the case is provided with a force sensor of the sensing unit and the upper end and the lower end of the amphibious coaxial shaft are respectively provided with a second magnetic steel and a third magnetic steel; and the four magnetic steels are arranged coaxially and have axes vertical to water level. The whole weighing water level gauge can be fixed conveniently and easily; the upper end of the amphibious coaxial shaft is in contact with the case without friction force under the combined action of gravity, buoyancy and bearing force; by using four magnetic steels for axial positioning, the weighing water level gauge avoids shaking of the amphibious coaxial shaft and can achieve high water level measurement accuracy.

Description

technical field [0001] The weighing water level gauge of the invention belongs to the field of hydrometeorological testing, in particular to an intelligent measuring device which uses piles to support a chassis and casing, and also has the functions of a basic station and a special station. Background technique [0002] The water level gauges used for automatic monitoring usually include float type, pressure type, bubble type and ultrasonic type. They are a single basic station or some kind of special station. The reasonable density of the station network is economically restricted, and the content and accuracy of hydrological data lag economic development. need. China proposed water level self-recording in the 1960s, and the vast territory and the influence of global climate change have obviously increased the urgency of the demand for advanced economic measuring stations. Although these sensors have their own characteristics, they also have their own defects. For example,...

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Problems solved by technology

Although these sensors have their own characteristics, they also have their own defects. For example, the float-type water level gauge must prevent wells from silting up during use, the pressure-type water-level gauge is unstable, and the bubble-type water-level gauge must avoid air pipe discounting. Sand deposits, ultrasonic water level gauge is affected by temperature, the accuracy is not high

The recently proposed differential magnetic levitation water level gauge and balanced magnetic levitation water level gauge try to reduce the mutual influence of each magnetic field through the isolation sleeve, but it is difficult to completely separate the magnetic field during actual operation, which leads to the failure of the balance device

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