A method for on-line detection of oil tank capacity by fiber grating

A fiber grating and fiber grating demodulation technology, applied in the direction of volume measuring instruments/methods, measuring capacity, measuring devices, etc., can solve the problems of inapplicability of electrical sensors, achieve high accuracy and reduce the number of channels

Active Publication Date: 2017-11-21
CHINA JILIANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There are many sensors on the market that can measure hydraulic pressure and capacity, but traditional electrical sensors are not suitable

Method used

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  • A method for on-line detection of oil tank capacity by fiber grating
  • A method for on-line detection of oil tank capacity by fiber grating
  • A method for on-line detection of oil tank capacity by fiber grating

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Embodiment Construction

[0022] Such as figure 1 with figure 2 As shown, the liquid capacity online detection device in the oil tank of the present invention includes an oil tank 1; an optical fiber grating liquid level sensor 2; a dipstick 3; an optical fiber 4; an optical fiber grating demodulator 5; a PC 6; Among them, the optical fiber grating liquid level sensor 2 and the optical fiber grating temperature sensor 7 are fixed on the bottom surface of the oil tank 1 by welding, the sensors of the same channel are connected with the optical fiber 4, and the sensors of 8 channels are connected to the optical fiber grating across the top of the oil tank through the optical fiber 4 In the demodulator 5, the demodulator 5 is connected to the PC 6 through a network cable.

[0023] The oil tank in this embodiment is a 100,000 cubic meter oil tank with a height of 20 meters and a bottom diameter of 80 meters. The spacing between them adopts the same distribution structure to make it suitable for the oil ...

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Abstract

The invention discloses a method for detecting capacity of an oil tank with fiber bragg gratings online. Fiber bragg grating liquid level sensors are fixed on the bottom surface of the oil tank via a 8*8 multipoint net distribution structure by means of welding, the sensors are connected through fibers and the connected with a fiber bragg grating demodulator through fibers, and the demodulator is connected with an upper computer (PC). Based on the liquid level height measured by the fiber bragg grating liquid level sensors, a simulative liquid stereoscopic topography model is established through the computer, and high-precision actual liquid capacity is obtained by computing with a mathematical method.

Description

technical field [0001] The invention relates to a method for detecting liquid capacity, in particular to a method for on-line detection of oil tank capacity by an optical fiber grating. Background technique [0002] The large oil tanks currently used have a cylindrical appearance, but the bottom surface is not flat. It is similar to the surface of a cone. Capacity error caused by concave deformation. The measurement of the oil storage capacity of the oil tank in the national verification regulations is obtained by measuring the height of the dipstick and consulting the capacity table. The capacity table is compiled based on the results of the empty tank measurement, and the relationship table between the height and the capacity of the empty tank is obtained. The measurement methods include the gage method, the total station method, and the three-dimensional laser scanning method. It can be seen that this measurement method is not a real-time online measurement method, and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01F17/00G01F23/292G01F23/04
Inventor 沈小燕陆枫韩娅胡佳成李东升
Owner CHINA JILIANG UNIV
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