Essential explosion-proof liquid level detection device and method

A liquid level detection, explosion-proof technology, applied in the direction of using optical devices to transmit sensing components, displaying liquid level indicators through pressure measurement, etc., can solve the problems that it is difficult to achieve accurate measurement, and the measurement accuracy can only reach 10cm level. Achieve the effects of reducing human error, good safety, and high detection accuracy

Active Publication Date: 2009-05-06
T&S COMM
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Problems solved by technology

However, this liquid level measurement method requires the introduction of voltage and electrical signals on the one hand, which is usually restricted to use in flammable, explosive and other occasions. For example, in the oil storage (oil tank) industry, liquid level measurement is still used Manual method, measuring personnel climb to th

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  • Essential explosion-proof liquid level detection device and method
  • Essential explosion-proof liquid level detection device and method
  • Essential explosion-proof liquid level detection device and method

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[0033] The present invention will be further described below in conjunction with the drawings and preferred embodiments.

[0034] Such as figure 1 Shown is an intrinsically explosion-proof liquid level detection device for measuring the liquid level of the liquid 901 to be measured in the container 900. The device includes: a wavelength analyzer 500 and a fiber grating buoyancy pulling device arranged in a container 900. Wherein, the fiber grating buoyancy pulling device includes: a float 100 immersed in the liquid to be tested 901, a fiber grating 200, and a fixed end 400 fixedly arranged in the container 900. One end of the fiber grating 200 is fixed to the fixed end 400, and the other end is fixed to the buoy 100. The buoy 100 pulls the fiber grating 200 tightly under the combined force of gravity and buoyancy. The wavelength analyzer 500 transmits light waves in a certain frequency range to the fiber grating 200 through the optical cable 501, and receives the light waves refl...

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Abstract

The invention discloses an essence explosion proof type liquid level height detecting device and aw method. The essence explosion proof type liquid level detecting device comprises a wavelength analyzer, an optical cable, and a fiber grating buoyancy drawing device, wherein the fiber grating buoyancy drawing device comprises a buoyancy pontoon, a fiber grating and a fixing end, the wavelength analyzer emits light wave with certain frequency range to the fiber grating through the optical cable and receives the light wave reflected back by the fiber grating, the reflected light is analyzed, and the liquid level height of the liquid to be detected is calculated. Compared with the prior art, the device and the method have the advantages that the detected point can have no power supply, the device can be widely applied to explosive and flammable environment or highfield powerful electromagnetic environment such as petrochemical industry, and the like, the detection in a long distance can be realized; meanwhile, the detection accuracy is high, the millimetre-sized accurate measurement can be realized; moreover, the device and the method can realize network interconnection to intensively monitor the liquid level height of a plurality of places.

Description

technical field [0001] The invention relates to a buoyancy pulling device, an intrinsic explosion-proof liquid level detection device and a method, in particular to a buoyancy pulling device and an intrinsic explosion-proof liquid level detection device for detecting the liquid level height of a liquid container by using a buoyancy stretching optical fiber grating Detection device and method. Background technique [0002] In 1989, POREY reported for the first time that Fiber Bragg Grating (FBG for short) was used as a sensor device. Fiber Bragg Grating is a kind of fiber optic passive device, which is actually a section of fiber, and its core has a structure with a periodically changing refractive index, or a Bragg reflector in the fiber core. It utilizes the ultraviolet photosensitivity of the fiber material to expose the bare fiber to the interference pattern of the ultraviolet beam from the side through the double-beam interference method and the phase mask method, write...

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Application Information

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IPC IPC(8): G01F23/14G01D5/353
Inventor 卫广远
Owner T&S COMM
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