Three optical fiber sensing projects were promoted by military technology to civilian use

With the rise of the Internet of Things industry, the huge market scale is attracting major manufacturers to seize this market
.
As an important part of the Internet of Things, optical fiber sensing technology has also received more and more attention
.
It is worth mentioning that this part of the market also brings new space
for optical fiber manufacturers suffering from overcapacity.

The Ministry of Industry and Information Technology recently issued the "Catalogue of Promotion of Military Technology to Civilian Use (2013)" and "High-tech and Product Recommended Catalogue (2013)
".
The release of the two catalogs is not only conducive to the promotion and application of advanced military technology in the civilian field, further exerting its strong traction on the development of the national economy, especially high-tech industries, but also conducive to guiding advantageous private enterprises to enter the field of military research and production, accelerating the extension of the equipment development supply chain to the national industrial base, and playing a positive role
in promoting the in-depth development of military-civilian integration.
It is understood that in 2009 and 2011, the Ministry of Industry and Information Technology compiled and issued two issues of the "Catalogue for the Promotion of Military Technology to Civilian Use", and only then began to widely promote the "military-to-civilian" project
.
In 2012, the technical conversion rate of the "Catalogue" reached 31%, and the total contract value of 51 projects that have been converted and applied reached 800 million yuan
.

The "Catalogue of Military Technology to Civilian Promotion (2013)" released a total of 150 military technology achievements
suitable for conversion to civilian population in 6 technical fields according to three categories: key recommended projects, recommended projects and promotion projects.
The "High-tech and Product Recommended Catalogue (2013)" mainly combines the characteristics of dual-use technology, and releases a total of 118 technical achievements
according to two categories: key promotion projects and promotion projects.

There are three fiber optic sensing technologies
.
These three technologies can be used in oil exploration, marine environment monitoring, warehouse temperature monitoring, automobile exhaust monitoring, mine monitoring and civil ship navigation
.
The basic working principle of the optical fiber sensor is to send the light from the light source through the optical fiber into the modulator, so that the parameters to be measured interact with the light entering the modulation area, resulting in a change in the optical properties of the light, called the modulated signal light, and then use the influence of the measured on the transmission characteristics of the light to complete the measurement
.
Relevant report data show that from 2012 to 2017, the average annual growth rate of global fiber optic sensor (including point-and-split and distributed) is as high as 20.
3%, and its annual consumption value will increase from 1.
58 billion US dollars in 2012 to 3.
98 billion US dollars
in 2017.

1.
High reliability optical fiber pressure sensing technology in complex environment (recommended project in 2013 > Electronic information field)

Developed by China Electronics Information Industry Group Changsha Xiangji Haidun Technology Co.
, Ltd.
, it belongs to the domestic leading level
.

Technical introduction: Optical fiber pressure sensors are divided into optical fiber pressure sensors and optical fiber micro pressure sensors
according to intensity.
The optical fiber pressure sensor is mainly based on intensity optical fiber modulation, and the environmental parameters such as pressure, temperature, acceleration, strain, flow, and speed are measured through the loss change of transmitted light intensity caused by micro-bending of the optical fiber
.
Optical fiber micro-pressure sensors are mainly phase modulated, such as fiber optic hydrophones, which use sound waves to detect, locate and identify
underwater targets.

Technical features: Through the modulation of different physical parameters, the optical fiber pressure sensor produced can be applied to oil exploration, marine environment monitoring, vibration monitoring, etc
.
It has completed the research and development of optical fiber hydrophones and vector hydrophones, and the interferometer-type sensor based on coupler has high phase sensitivity, withstand voltage, stable and reliable performance, long service life, and is suitable for large-scale arraying.

Technical indicators: acceleration sensitivity: ≥30dB; Dynamic range: ≥110dB; Equivalent noise sound pressure dB@1kHz: ≤50; Working water depth: ≥1000m; Working temperature: 2~40°C
.

Applicable fields and scope: oil exploration, marine environment monitoring, vibration monitoring, etc
.

Patent status: 2 patents have been applied

Technical status: small batch production stage

Cooperation method: cooperative development

Input demand: determined according to the cooperation situation

Conversion cycle: 1 year

Expected benefits: According to the annual output of 1,000 optical fiber sensors, supporting photoelectric signal demodulation equipment, annual sales revenue of 130 million yuan
.

2.
Absorption optical fiber gas concentration sensing tester (2013 promotion project > electronic information field)

Developed by China Aerospace Science and Technology Corporation Fifth Academy Space Star Space Technology Application Co.
, Ltd.
, it belongs to the domestic leading level
.

Technical introduction: There are many influential gases in the production and living environment, such as CH4, CO, etc.
produced in industrial mine production, which are important components of mine gas explosion; In petrochemical storage and transportation stations, gas stations and other occasions, the leakage of toxic and flammable gases needs to be detected and monitored
in real time.
However, such environments are inherently dangerous, and the electronic test instruments commonly used today may be unsafe, so they cannot be used
in these environments.

Compared with traditional electronic devices, optical fiber devices have the characteristics of insulation, and will not be affected when used in environments such as electromagnetic interference and high voltage, and optical fiber can also be used
safely in high temperature, high pollution, flammable gas environment.
Therefore, optical fiber sensing devices have a huge market space
.

(1) The collimator is used as a sensing element
.
A collimator
with a working distance of more than 1 meter is required.

(2) Using the White cavity reflection method, the optical path is superimposed, and the volume of the sensing part is compressed to 20X40mm
.

(3) With single-mode optical fiber as the transmission medium, the transmission distance can reach 30KM, and the signal processing can be placed in a safe environment
.

(4) The sensing part and the processing part can be separated and matched with each other, and the sensing device can be used in the environment to be measured, and the light source can be switched to obtain the detection results
of various gas concentrations.

Implementation principle and approach: (1) Most gases have characteristic absorption lines in the infrared band, which is the low-loss window of quartz fiber, so the optical fiber absorption sensor can use these gas absorption spectra in the near-infrared band for detection
.
(2) What gas is about in an environment, according to the absorption wavelength of these gases, with a broadband light source that can cover this range, light will be absorbed by the gas after passing through the gas, the energy at the corresponding wavelength will be attenuated, by measuring the attenuation of the light intensity caused by the gas at a specific absorption peak, the concentration
of the gas to be measured can be obtained.
(3) Using optical fiber as transmission medium, collimator as sensing element, the collimator with a space path of 1m is docked in a gas chamber, the gas has an absorption spectrum for light, and the absorption amount of the absorption spectrum is processed to obtain an accurate gas concentration
.

Technical characteristics: (1) With optics as the basis and optical fiber as the transmission carrier, it solves the serious consequences
of electric sparks that may be brought about by the use of electronic instruments in the environment of high pollution environment, chemical medium and strong electromagnetic interference, especially in the environment of flammable and explosive materials.
(2) The White cavity method of multiple reflections is adopted, which increases the optical path and reduces the volume, thereby improving the sensitivity
.
(3) Use the most advantageous wavelength range of optical communication to reduce the impact of
noise.
(4) The coupled signal adopts a beam expansion scheme to minimize
the loss of optical information.
(5) The optical path has highly sensitive TPPD for detection and demodulation to reduce the influence
caused by the instability of the light source.

Technical indicators: the use of reflection method for packaging, the loss of the sensing end is guaranteed to be less than 0.
8dB; The optical echo of the device is greater than 60dB; Available wavelength range 1250~1800nm; Can test the main gases: H2O, NO, NH3, CO2, CO, CH4; H2O, NH3, CO2, CO concentration accuracy up to 1ppm
.

Application fields and range: absorption gas concentration sensing tester can be applied to detect various types of gas concentration sensor devices, in mines, arsenals and other occasions in the dangerous gas concentration test, monitoring the concentration of dangerous gas to ensure safety
.
Second, the absorption gas concentration sensing tester can be applied to temperature monitoring, mainly in large warehouses such as tobacco and grain
.
Third, the absorption gas concentration sensing tester can be applied to the monitoring of automobile exhaust, comply with the national IV standard, monitor the concentration of automobile exhaust, and ensure our clear living environment
.

Technical status: sample stage

Cooperation mode: technical service, product sales

Input demand: 100 million yuan

Conversion cycle: 2 years

Expected benefits: The project results can be widely used in gas concentration detection in various environments, especially for the needs of many special environments, such as flammable and explosive environments that are not suitable for electronic testers, and have safe and reliable testing methods
.
If corrosion resistance is required in a high corrosion environment, it ensures high reliability and long life of the instrument, and promotes the new development
in the field of gas concentration testing in China.
After the industrialization of civil use, within 3 years, the company will be a leading enterprise in high-precision gas detection, which can create more high-end employment opportunities, generate hundreds of millions of yuan of operating income, and bring more fiscal revenue
to the central government and local governments.

3.
High-precision optical fiber strapdown compass technology (2013 promotion project > electronic information field)

Developed by the 6354 Research Institute of China State Shipbuilding Corporation, it belongs to the domestic leading level
.

Technical introduction: The technology uses fiber optic gyroscope and accelerometer as the measurement sensitive components, and realizes the output of information such as
the position, heading and attitude of the motion carrier by testing the earth's gravity field, earth rotation and other parameters, and using the inertial strapping solution method 。 Optical fiber strapdown compass is mainly composed of 3 high-precision optical fiber gyroscopes, 3 quartz accelerometers, navigation computer and secondary power supply, through the independent breakthrough of low-cost, high-reliability marine optical fiber gyro inertial measurement unit development, high-precision rapid initial alignment under the ship's shaking interference base, multi-sensor based high-precision combined navigation and other key technologies, developed a medium and high-precision optical fiber strapdown compass that can meet the low cost, high reliability and good environmental adaptability of vibration, shock, salt spray, mold and other environmental adaptability.
It can replace the traditional marine electronic control compass and is widely used in civil ship navigation and other fields
.

Technical features: high precision, small size, low power consumption, high reliability, good maintainability, good environmental adaptability and other characteristics
.

Technical indicators: (1) measurement accuracy: roll / pitch (RMS), 0.
05°;(2) operation preparation time, ≤15min;(3) data update rate, 100Hz; (4) working environment: working temperature -10°C ~ +50°C, storage temperature -40°C ~ +60°C
.

Application fields and scope: all kinds of ships, underwater submersibles, stable platforms and other carriers
that require attitude information.

Technical status: small batch production stage

Cooperation methods: cooperative development, venture capital, product sales

Investment demand: 25 million yuan is required, including 20 million yuan in equipment and production line construction, 3 million yuan in technology development and 2 million yuan in working capital
.

Conversion cycle: 1 years

Expected benefits: form a mass production capacity of 100 sets of products per year, achieve sales revenue of 60 million yuan and profit of 12 million yuan
.