Fiber grating sensor capable of synchronously measuring flow velocity and level of liquid
A fiber grating and sensor technology, applied in the field of fiber grating sensors, to achieve the effect of avoiding influence
Pending Publication Date: 2018-08-14
YANCHENG INST OF TECH
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[0005] At present, fiber grating flow rate sensors such as fan-type fiber grating flow rate sensor package with temperature self-compensation function (CN 103913593B) and target fiber grating flow rate meter (CN 101995485A) are mostly flow rate sensors proposed for the background of liquid filling the pipeline under test. , and then obtain the liquid flow information inside the measured pipeline; this has certain application limitations in the aspect that the measured liquid has not yet filled the measured pipeline
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[0018] The present invention will be further described below in conjunction with the accompanying drawings and specific implementation examples.
[0019] Such as Figure 1-2 As shown, the reference signs are as follows: flow rate strain conversion element 1, liquid level strain conversion element 2, liquid level sensor fiber grating 3, flow rate sensor fiber grating 4, equal strength cantilever beam 5, cantilever beam fixing part 6, filter screen 7. Pipe connector 8, optical fiber pigtail 9, optical fiber outlet hole 10, protective housing 11, protective housing fixing member 12, N vertical blade turbines 101 (N is an adjustable positive integer), and central shaft 102.
[0020] Such as figure 1 As shown, an optical fiber grating sensor for simultaneous sampling of liquid flow velocity and liquid level, the sensor mainly includes: flow velocity strain conversion element 1, liquid level strain conversion element 2, liquid level sensitive element fiber grating 3, flow velocity ...
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The invention discloses a fiber grating sensor capable of synchronously measuring the flow velocity and level of liquid, and belongs to the technical field of fiber grating detection sensors. The fiber grating sensor capable of synchronously measuring the flow velocity and level of the liquid includes a protection shell, a pipeline connection part is arranged on the protection shell, a flow velocity strain transduction element is arranged inside the protection shell, a liquid level strain transduction element is arranged on the lower portion of the interior of the protection shell, and a liquid level sensitive element fiber grating is arranged on the liquid level strain transduction element; a cantilever beam uniform in strength is arranged at one side of the interior of the protection shell, and a flow velocity sensitive element fiber grating is arranged on the lower surface of the cantilever beam uniform in strength; the liquid level sensitive element fiber grating and the flow velocity sensitive element fiber grating are connected with fiber pigtails respectively. By the adoption of the fiber grating sensor capable of synchronously measuring the flow velocity and level of the liquid, the flow velocity and level of the liquid to be measured are measured at the same time, and the influence of a to-be-measured pipeline which is not filled with the liquid to be measured on flowmeasurement is avoided.
Description
technical field [0001] The invention belongs to the technical field of optical fiber grating detection sensors, and in particular relates to an optical fiber grating sensor for simultaneous sampling of liquid flow velocity and liquid level. Background technique [0002] Accurate measurement of velocity / flow rate plays a very important role in industrial production process control, energy metering, environmental protection and so on. [0003] Nowadays, the most widely used is the mechanical rotor flow rate measuring instrument, but it is limited by the mechanical structure, and the measurement accuracy is low, while the subsequent electromagnetic flowmeter, ultrasonic flowmeter and acoustic Doppler flowmeter have higher measurement accuracy, but Its sensitive measurements are electronic components that are susceptible to electromagnetic radiation. [0004] Fiber gratings are widely used as the sensitive element of grating flow sensors because of their high measurement accura...
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IPC IPC(8): G01D21/02
CPCG01D21/02
Inventor 蒋善超何坚强辅小荣张春富徐顺清杨晓冬
Owner YANCHENG INST OF TECH