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Pressure sensor based on flexible polymer waveguide

A technology of pressure and optical waveguide, which is applied in fluid pressure measurement using optical methods, measuring fluid pressure, and measuring the change of optical properties of materials when they are stressed, and can solve problems such as being susceptible to electromagnetic interference

Active Publication Date: 2021-05-04
上海光织科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the fact that it converts the pressure signal into a capacitance or current or voltage signal, it is easy to receive electromagnetic interference, and it is difficult to process and manufacture on flexible materials to form an array-type sensing unit.

Method used

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  • Pressure sensor based on flexible polymer waveguide
  • Pressure sensor based on flexible polymer waveguide
  • Pressure sensor based on flexible polymer waveguide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Such as figure 2 As shown, it is the flow chart of the preparation of the flexible polymer waveguide involved in this embodiment, and the preparation is as follows image 3 with Figure 4 The shown flexible polymer waveguide includes two non-contact fiber cores, wherein: the input port and the output port of the two fiber cores are arranged horizontally and symmetrically, and the middle area of ​​the fiber core is vertically symmetrically arranged.

[0037] The distance between the input port and the output port is 250 μm, and the distance between the vertically symmetrical middle regions is 15 μm.

[0038] Such as figure 1 As shown, it is the optical waveguide pressure measurement system involved in this embodiment, which includes: a narrow linewidth fiber laser 1, an optical modulator 2, a PLC beam splitter 3, and a flexible polymer waveguide group 4 prepared based on the direct writing method in series. , the multi-channel power meter 5 and the fiber coupler 15 a...

Embodiment 2

[0053] Such as Figure 9a As shown, it is the optical waveguide pressure measurement system involved in this embodiment. Compared with the embodiment, this embodiment will figure 1 The interference component 4 in the optical waveguide in is replaced as Figure 9b The shown Michelson optical waveguide group 17 realizes a movable optical connector at one end, thereby reducing the extra loss caused by the implementation.

[0054] This embodiment specifically includes: a narrow-linewidth fiber laser 1, an optical modulator 2, a PLC splitter 3, a Michelson optical waveguide group 17, a multi-channel power meter 5 arranged at the output end of the Michelson optical waveguide group 17 connected in series in sequence, The polarization controller 6 between the PLC optical splitter 3 and the Michelson optical waveguide group 17, wherein: an output port of the polarization controller 6 and the Michelson optical waveguide group 17 is connected with the fiber coupler 15, and the output of...

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Abstract

A pressure sensor based on a flexible polymer waveguide comprises two fiber cores which are not in contact, input ports and output ports of the two fiber cores are horizontally and symmetrically arranged, and pressure detection areas in the middles of the fiber cores are vertically and symmetrically arranged. The one or more optical waveguide directional couplers or interferometers have a spatial three-dimensional bendable structure, the waveguide material has good ductility and large Young modulus, and one or more optical waveguide directional couplers or interferometers which can enable the intensity ratio or the phase difference of emergent light of different light paths to change along with the magnitude of the pressure borne by the pressure sensing area are designed through the waveguide, so single-point type or array type pressure measurement is realized, and the pressure sensor can be applied to wearable equipment or other pressure measurement scenes as a pressure sensor.

Description

[0001] This application is the application number 201810710563.8, the application date is 2018 / 7 / 2, and the name of the invention is a divisional application for a pressure sensor based on a flexible polymer waveguide technical field [0002] The invention relates to a technology in the field of pressure sensing, in particular to a single-point or array planar pressure sensor based on a flexible polymer waveguide prepared by a direct writing method. Background technique [0003] A pressure sensor is a device or device that can sense pressure signals and convert the pressure signals into usable output electrical signals according to certain rules. A pressure sensor usually consists of a pressure sensitive element and a signal processing unit. According to different test pressure types, pressure sensors can be divided into gauge pressure sensors, differential pressure sensors and absolute pressure sensors. Traditional pressure sensors are mainly based on mechanical structural...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01L1/24G01L11/02
CPCG01L1/242G01L11/025
Inventor 何祖源马麟杨晓宇
Owner 上海光织科技有限公司