Optical circuit-type reformulated fuel detecting sensor device and method for manufacturing sensor element thereof

Patent metadata

Field	Value
Publication number	US-9335314-B2
Application number	US-201414253335-A
Country	US
Kind code	B2
Filing date	Apr 15, 2014
Priority date	Nov 19, 2013
Publication date	May 10, 2016
Grant date	May 10, 2016

Abstract

Disclosed herein is an optical circuit-type reformulated fuel detecting sensor device. The optical circuit-type reformulated fuel detecting sensor device includes: an optical source part generating optical signals having a single wavelength; a sensor part receiving the optical signals generated by the optical source part and outputting a reference optical signal and a sensed signal; a first photo-detector receiving the reference optical signal and outputting a reference optical output signal; a second photo-detector receiving the sensed signal and outputting a sensed optical output signal; an operation controlling part receiving the reference optical output signal and the sensed optical output signal and determining characteristics of fuel; and an output part receiving and outputting a result of the operation controlling part.

First claim

What is claimed is:

1. An optical circuit-type reformulated fuel detecting sensor device comprising:
an optical source part generating optical signals having a single wavelength;
a sensor part receiving the optical signals generated by the optical source part and outputting a reference optical signal and a sensed signal for test fuel;
a first photo-detector receiving the reference optical signal and outputting a reference optical output signal;
a second photo-detector receiving the sensed signal and outputting a sensed optical output signal;
an operation controlling part receiving the reference optical output signal and the sensed optical output signal and determining characteristics of the fuel; and
an output part receiving and outputting a result of the operation controlling part.

2. The optical circuit-type reformulated fuel detecting sensor device of claim 1 , wherein the sensor part includes:
an optical input part receiving the optical signals generated by the optical source part;
an optical signal splitter part uniformly splitting the optical signals incident from the optical input part into first and second optical signals;
a reference channel part receiving the first optical signal and outputting the reference optical signal; and
a sensing channel part receiving the second optical signal and passing the test fuel therethrough to output the sensed optical signal, and
the sensor part is formed of a plane optical circuit-type sensor element.

3. The optical circuit-type reformulated fuel detecting sensor device of claim 2 , wherein the reference channel part includes:
a first core layer through which the first optical signal passes;
a first upper clad layer formed on the first core layer; and
a first under clad layer formed beneath the first core layer,
the first core layer having a refractive index higher than those of the first upper clad layer and the first under clad layer and having a refractive index between a refractive index of additive oil added for manufacturing reformulated fuel and a refractive index of a normal fuel component.

4. The optical circuit-type reformulated fuel detecting sensor device of claim 2 , wherein the sensing channel part includes:
a second core layer through which the second optical signal passes;
a second upper clad layer formed on the second core layer;
a second under clad layer formed beneath the second core layer; and
a sample part formed in central sections of the second upper clad layer and the second core layer and formed of a space part cut in a groove part shape up to an upper surface of the second under clad layer,
the second core layer having a refractive index higher than those of the second upper clad layer and the second under clad layer and having a refractive index between the refractive index of the additive oil added for manufacturing the reformulated fuel and the refractive index of the normal fuel component.

5. The optical circuit-type reformulated fuel detecting sensor device of claim 3 , wherein the sensing channel part includes:
a second core layer through which the second optical signal passes;
a second upper clad layer formed on the second core layer;
a second under clad layer formed beneath the second core layer; and
a sample part formed in central sections of the second upper clad layer and the second core layer and formed of a space part cut in a groove part shape up to an upper surface of the second under clad layer,
the second core layer having a refractive index higher than those of the second upper clad layer and the second under clad layer and having a refractive index between the refractive index of the additive oil added for manufacturing the reformulated fuel and the refractive index of the normal fuel component.

6. The optical circuit-type reformulated fuel detecting sensor device of claim 2 , wherein the sensing channel part includes:
a second core layer through which the second optical signal passes;
a second upper clad layer formed on the second core layer;
a second under clad layer formed beneath the second core layer; and
a sample part formed in a central section of the second upper clad layer and formed of a space part cut in a groove part shape up to an upper surface of the second core layer,
the second core layer having a refractive index higher than those of the second upper clad layer and the second under clad layer and having a refractive index between the refractive index of the additive oil added for manufacturing the reformulated fuel and the refractive index of the normal fuel component.

7. The optical circuit-type reformulated fuel detecting sensor device of claim 3 , wherein the sensing channel part includes:
a second core layer through which the second optical signal passes;
a second upper clad layer formed on the second core layer;
a second under clad layer formed beneath the second core layer; and
a sample part formed in a central section of the second upper clad layer and formed of a space part cut in a groove part shape up to an upper surface of the second core layer,
the second core layer having a refractive index higher than those of the second upper clad layer and the second under clad layer and having a refractive index between the refractive index of the additive oil added for manufacturing the reformulated fuel and the refractive index of the normal fuel component.

8. The optical circuit-type reformulated fuel detecting sensor device of claim 1 , wherein the first and second photo-detectors detect and output powers of the optical outputs or light transmittances.

9. The optical circuit-type reformulated fuel detecting sensor device of claim 1 , wherein the optical source part generates optical signals having a wavelength of 2.17 μm.

10. The optical circuit-type reformulated fuel detecting sensor device of claim 3 , wherein the refractive index of the first core layer is 1.42 to 1.48.

11. The optical circuit-type reformulated fuel detecting sensor device of claim 4 , wherein the refractive index of the first core layer or the second core layer is 1.42 to 1.48.

12. The optical circuit-type reformulated fuel detecting sensor device of claim 6 , wherein the refractive index of the first core layer or the second core layer is 1.42 to 1.48.

13. The optical circuit-type reformulated fuel detecting sensor device of claim 1 , wherein the operation controlling part compares the reference optical output signal and the sensed optical output signal with each other to determine whether or not the test fuel is reformulated fuel.

14. A method for manufacturing an optical circuit-type reformulated fuel detecting sensor element, comprising:
forming a substrate;
forming an optical input part and an optical signal splitter part on the substrate; and
forming a reference channel part and a sensing channel part each split from the optical signal splitter part,
wherein the sensing channel part includes:
a second under clad layer formed on the substrate;
a second core layer formed on the second under clad layer;
a second upper clad layer formed on the second core layer; and
a sample part formed in central sections of the second upper clad layer and the second core layer and formed of a space part cut in a groove part shape up to an upper surface of the second under clad layer.

15. A method for manufacturing an optical circuit-type reformulated fuel detecting sensor element, comprising:
forming a substrate;
forming an optical input part and an optical signal splitter part on the substrate; and
forming a reference channel part and a sensing channel part each split from the optic

Assignees

• Korea Electronics Telecomm

Inventors

• Ryu Jin-Hwa
• Baek Kyu-Ha
• Do Lee-Mi
• Lee Kang-Bok

Classifications

• G01N21/552

  Attenuated total reflection · CPC title

• G01N33/22 Primary

  Fuels; Explosives · CPC title

• G01N21/3577 Primary

  for analysing liquids, e.g. polluted water · CPC title

• Y10T29/4913

  Assembling to base an electrical component, e.g., capacitor, etc. · CPC title

• G01N2201/08

  Optical fibres; light guides · CPC title