Sealing rod type laser liquid level gauge

Abstract

The invention relates to a sealing rod laser liquid level meter, wherein the upper surface inside the long hollow testing rod whose one end is sealed, is arranged with magnetic float with reflective film, while it is sheathed with annular magnetic float, and two magnetic float have inversed polarities; the sealing head at the open is connected to the tester with laser and detector; the tester is formed by single chip, display and time expanding circuit; the laser and detector are packed in the end connected to the sealing head; the sealing head has relative connecting hole; the tester also can be arranged remotely with the testing rod; the laser, detector and connecting hole are connected via optical fiber. The invention uses sealing rod structure, to avoid the laser radiation on the mixing gas, with high safety; and the light resource is remote from the tested medium, to make the lighting surface and receiving surface of tester clean, and the invention has long service time; in addition, it uses time expanding circuit to improve the testing accuracy.

Description

technical field [0001] The invention relates to a liquid level gauge, in particular to a sealing rod type laser liquid level gauge. Background technique [0002] Traditional liquid level gauges mainly include scale type and connecting rod float type. There are many types of new liquid level gauges, such as: photoconductive liquid level gauges, ultrasonic liquid level gauges, optical fiber liquid level gauges, electrostatic capacitance liquid level gauges, and laser liquid level gauges. [0003] Due to the high energy density of the laser used in the laser level gauge, in the liquid level test of flammable and explosive liquids such as oil, the direct irradiation of the laser can easily ignite the flammable mixture and cause a safety accident of deflagration, so the ordinary laser level gauge Not suitable for these occasions. [0004] Moreover, the current laser level gauge generally adopts a single pulse test. Due to the extremely fast laser speed, it is difficult to measu...

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Problems solved by technology

[0003] Due to the high energy density of the laser used in the laser level gauge, in the liquid level test of flammable and explosive liquids such as oil, the direct irradiation of the laser can easily ignite the flammable mixture and cause a safety accident of deflagration, so the ordinary laser level gauge not suitable for these occasions

[0004] Moreover, the current laser level gauge generally adopts a single pulse test. Due to the extremely fast laser speed, it is difficult to measure accurately in a short measuring distance, and the shorter the measuring distance, the lower the measuring accuracy.

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