Flow velocity sensor based on polymer optical waveguide

A technology of flow velocity sensor and optical waveguide, which is applied in fluid velocity measurement, instrumentation, velocity/acceleration/shock measurement, etc. It can solve the problems of complex mechanical structure, low accuracy of measuring flow velocity, and large volume, and achieve high-precision measurement and high Effect of Resolution and Response Speed

Active Publication Date: 2017-05-10
BEIHANG UNIV
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Problems solved by technology

But the sensor has complex mechanical structure, bulky and poor reliability
In addition, the sensor uses a target body to measure the impact force. The target body has a large area and has a great influence on the flow velocity of the flow field, making the measurement accuracy of the flow velocity low.

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  • Flow velocity sensor based on polymer optical waveguide
  • Flow velocity sensor based on polymer optical waveguide
  • Flow velocity sensor based on polymer optical waveguide

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Embodiment Construction

[0029] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0030] An embodiment of the flow rate sensor based on the polymer optical waveguide provided by the present invention is figure 1 with figure 2 as shown, figure 1 is the front view of the polymer optical waveguide-based flow rate sensor, figure 2 yes figure 1 Cross-sectional view in direction A-A, showing the movement of the light spot on the position-sensitive detector PSD. The flow velocity sensor based on polymer optical waveguide includes a laser light source and its driving circuit 1, optical fiber 2, polymer optical waveguide 3, position sensitive detector (PSD) 4 and signal processing system 5 arranged in a fixed box 6 . The polymer optical waveguide 3 is fixed and directly coupled with the output end of the optical fiber 2 during the manufacturing process, and the input end of the optical fiber 2 is connected with the laser light source...

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Abstract

The invention discloses a flow velocity sensor based on polymer optical waveguide, belonging to the technical field of flow field sensors and manufacturing thereof. The flow velocity sensor can be used for high-precision detection and feedback control of the surface flow field of an aircraft. The flow velocity sensor comprises a laser light source and a driving circuit, a polymer optical waveguide, an optical fiber, a position sensitive detector, a signal processing system and a fixed casing; the polymer optical waveguide and the optical fiber output end are fixed and directly coupled, the optical fiber input end is connected with the laser light source and the driving circuit, the polymer optical waveguide, the optical fiber, and the laser light source and the driving circuit are fixed to one side of the fixed casing, the position sensitive detector and the signal processing system are connected and are fixed to the opposite side of the fixed casing, and the top of the fixed casing is provided with a through hole. The polymer optical waveguide is good in flexibility and can transmit optical signals, the small flexural deflection of the polymer caused by the small change of the flow field can be amplified on the position sensitive detector after being subjected to optical path transmission, so that the flow velocity of the flow filed can be measured in high precision.

Description

technical field [0001] The invention relates to a flow velocity sensor based on a polymer optical waveguide, which is suitable for flow field detection and feedback control on the surface of an aircraft, and belongs to the technical field of flow field sensors and their manufacture. Background technique [0002] Aircraft are important tools for humans to explore nature, and changes in the flow field on their surfaces affect their performance. Therefore, it is of great significance to realize high-precision monitoring of the velocity of the flow field on the surface of the aircraft. Existing flow rate sensors include pyroelectric, capacitive, piezoresistive, and piezoelectric. These types of sensors generally have shortcomings such as being greatly affected by the environment, low measurement accuracy, and poor reliability. [0003] Due to its advantages of high measurement accuracy and strong anti-interference ability, optical fiber is more and more used in the field of fl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01P5/26
CPCG01P5/26
Inventor 蒋永刚许远航马治强张德远
Owner BEIHANG UNIV
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