Distributed optical fiber level sensing system
A technology of distributed optical fiber and sensing system, which is applied in the direction of liquid level indicator, liquid/fluid solid measurement, engine lubrication, etc. It can solve the problems of inaccurate measurement results, hidden safety hazards, high cost, etc., and achieve the installation process Simplicity, weight reduction, low cost effect
Active Publication Date: 2019-03-22
BEIJING INST OF AEROSPACE CONTROL DEVICES
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[0003] Based on the above traditional liquid level sensors, there are many problems that are difficult to solve, including but not limited to: high cost, potential safety hazards, heavy weight, and inaccurate measurement results, etc.
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[0035] In order to make the object, technical solution and advantages of the present invention clearer, the embodiments disclosed in the present invention will be further described in detail below in conjunction with the accompanying drawings.
[0036] refer to figure 1 , shows a schematic structural diagram of a distributed optical fiber liquid level sensing system in an embodiment of the present invention. In this embodiment, the distributed optical fiber liquid level sensing system includes: an optical fiber liquid level sensor 100 , a fiber grating demodulator 4 and a bonding device 6 . Wherein, the optical fiber liquid level sensor 100 includes: an optical fiber 2 and at least two optical fiber long period grating LPG sensors 5 written continuously along the fiber axis of the optical fiber 2 .
[0037] Such as figure 1 , the optical fiber liquid level sensor 100 is connected to the output end of the fiber grating demodulator 4 through an optical fiber; the optical fiber...
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The invention discloses a distributed optical fiber level sensing system. The distributed optical fiber level sensing system comprises an optical fiber level sensor, an optical fiber grating demodulator and a bonding device, wherein the optical fiber level sensor comprises an optical fiber and at least two optical fiber long-period grating (LPG) sensors continuously inscribed in the axial direction of the optical fiber; the optical fiber level sensor is connected with the optical fiber grating demodulator through the optical fiber; the optical fiber level sensor is fixed inside a container tobe detected through the bonding device to form an array type optical fiber sensing network and further to determine the level of solution inside the container to be detected on the basis of the arraytype optical fiber sensing network and the optical fiber grating demodulator. The distributed optical fiber level sensing system can not only measure three-dimensional distributed container level information, but also be rapid in reaction and capable of achieving accurate and comprehensive level sensing results; meanwhile, compared with complicated encapsulating manners of electric instruments, reduces the weight of the sensor and eliminate irretrievable losses caused by explosion of fuel tanks due to spark ignition of electric level gauges.
Description
technical field [0001] The invention belongs to the technical field of optical fiber gratings, in particular to a distributed optical fiber liquid level sensing system. Background technique [0002] Since the 1960s, the aerospace field has developed many liquid-air interface sensing devices based on differences in resistance, capacitance, acoustic impedance, and viscous damping. Typical level sensing systems today that measure the amount of liquid in a fuel tank are draw-wire measurements, capacitive measurements, or measurements using a series of temperature or thermal resistance sensing devices in a rake or array configuration. [0003] Based on the above traditional liquid level sensors, there are many problems that are difficult to solve, including but not limited to: high cost, potential safety hazards, heavy weight, and inaccurate measurement results. Contents of the invention [0004] The technical problem solved by the present invention is to overcome the deficien...
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IPC IPC(8): G01F23/292
CPCG01F23/292
Inventor 梅影王学锋蓝天卞贺明唐才杰白利强崔留住王明超易小龙
Owner BEIJING INST OF AEROSPACE CONTROL DEVICES