Patent ID: 9588001
Date: 2017-03-07
CPC Classifications: G01L,G01M

Claim:
1. A pressure detecting apparatus made by 3D printing technologies comprising: a light source, being able to emit a detecting optical signal to at least one pressure transducer; a coupler, being able to couple the light source and the pressure transducer for receiving a reflection frequency signal fed back from the pressure transducer and to decode the variation of the reflection frequency signal into a pressure parameter for being transmitted to a processor; wherein the pressure transducer comprises: a main body having a strain layer and at least one opening, wherein the strain layer is set in the longitudinal axis direction of the main body and separates the main body into a first compartment and a second compartment, the opening is formed on a surface in the cross axis direction of the main body to connect to the second compartment; a fiber grating, having an input and an output, wherein the fiber grating comprises at least one fiber Bragg grating sensor, and the two sides of the fiber grating are fixed on the two sides of the center line of the cross axis of the main body, the fiber grating is fixed on the strain layer, and the fiber Bragg grating sensor is located on the fiber grating of the second compartment, the fiber grating covers a portion of the fiber Bragg grating sensor and is formed on the shortest path of two openings, the input of the fiber grating is configured to receive the detecting optical signal emitted from the light source, and the fiber grating is configured to generate the reflection frequency signal to the coupler after receiving the detecting optical signal, the reflection frequency signal is derived from reflection of the detecting optical signal inside the grating of the fiber Bragg grating sensor, when the main body is placed in a fluid region detecting the pressure parameters of the location, the fluid flows through the two openings and generates loading on the strain layer, thus the strain layer deforms and generates a strain variation on the fiber Bragg grating sensor to cause a signal variation in the reflection frequency spectrum.