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TThe Brillouin optical time domain analyzer BOTDA, also known as the distributed fiber optic temperature strain sensor or Brillouin optical time domain analyzer, adopts the fiber optic Brillouin backscattering effect and the optical time domain reflection OTDR principle. It is the latest generation of distributed fiber optic sensors in the world, which can achieve temperature, strain, and spectrum measurement at various points along the fiber optic line over ultra long distances, with a measurement distance of up to 20-100km and a measurement accuracy of 1 ºC/20 με, The measurement time is less than 60 seconds. The host uses standard communication single-mode optical fibers (ITU-T G.652, G.655, G.657, etc.) as sensors. The optical fiber is both a transmission medium and a sensing element, integrating transmission and sensing. By laying the optical fiber on the test object, real-time temperature and strain distribution information at each point on the optical fiber can be obtained, achieving continuous online monitoring and precise positioning over ultra long distances. BOTDA integrates advanced technologies such as optoelectronics, hardware, computer, and information processing, with advanced measurement principles and excellent technical performance. It has important applications in high-voltage cables, overhead lines, bridges, tunnels, dams, oil and gas pipelines, and other fields.
Basic parameters:
| Sensing Fiber |
Standard single mode fibers |
| Sensor Configuration |
Two fibers(loop) |
| Distance Range |
100km |
| Measurement Channels |
1/2/4 |
| Measurement Time |
60s(as low as 60s) |
| Temperature Range |
-40ºC~125ºC(According to the fiber optic material, it can reach 700 ºC) |
| Temperature Accuracy |
±1ºC(whole sensing range) |
| Temperature Resolution |
0.1ºC |
| Strain Range |
-10000με~+10000με |
| Strain Accuracy |
±20με(whole sensing range) |
| Strain Resolution |
2με |
| Sampling Space |
0.1m(as low as 0.1m) |
| Spatial Resolution |
0.5 m ~ 3 m |
| Fiber Connector |
FC/APC |
| Power Supply |
220VAC 50Hz,60W |
| Operating Temperature |
-10ºC~50ºC |
| Storage Temperature |
-20ºC~60ºC |
| Communication Connectors |
Ethernet,USB,RS232/RS485 |
| Data storage |
500GB or more |
| Dimensions(W×D×H) |
483×447×133 mm(19"rack) |
| Weight |
15kg |
Product features:
1. Continuous distributed measurement of temperature and strain without measurement blind spots
2. Using communication single-mode optical fibers and fully utilizing redundant optical fibers
3. Over a hundred kilometers of ultra long measurement distance, rich measurement information
4. Fiber optic is a sensor that combines transmission and sensing
5. Can accurately locate the location of events
6. Optical signal transmission, completely electrically insulated, resistant to electromagnetic interference
7. Frequency domain absolute encoding, high measurement accuracy, no need for calibration
8. Intrinsic safety, suitable for long-term operation in flammable and explosive environments
9. Stable and reliable measurement with low false alarm rate
10. Long service life of optical fibers, maintenance free for decades
Application scenarios
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These markets rely on high-quality, stable, and carefully designed technologies tailored to their industries.

Application plan

Product composition
Measurement host:
The measurement host is the core of the BOTDA product system, which includes functional modules such as ultra narrow linewidth semiconductor laser light source, microwave frequency detection, narrow pulse drive circuit, polarization control, optical amplification, weak signal detection, and ultra high speed data acquisition. Pump light and probe light are injected from both ends of the optical fiber. When the frequency difference between pump light and probe light is equal to the Brillouin frequency shift in a certain range of the fiber, stimulated Brillouin amplification effect occurs in that area, and energy transfer occurs between the two beams of light. By scanning and detecting the frequency of light, the Brillouin spectrum of any point in the fiber can be obtained, thereby obtaining distributed strain and temperature measurements.
LCD display (optional):
According to application requirements, it can be equipped with either a regular desktop or rack mounted LCD display. If BOTDA products need to be installed on standard cabinets, it is recommended to use rack mounted industrial grade LCD displays. Industrial grade components are preferred for this display, which have a long lifespan and good reliability; The panel is sprayed with aluminum magnesium alloy, which is aesthetically pleasing and sturdy; The galvanized sheet of the box body has strong oxidation and corrosion resistance characteristics, achieving IP65 protection level.
User Software:
The user software of this product includes:
The server-side software (fiber optic Brillouin analysis software) is mainly used for device hardware parameter settings and alarm settings,
The client software (fiber optic sensing online monitoring software) is mainly used for measuring curve display, data query, statistical analysis, and visual display.
Sensing fiber optic:
1. The optical fiber of the accessory is ordinary single-mode communication optical fiber, and specifications such as ITU-T G.652/653/655/657 can be selected. To form a measurement loop, the BOTDA measurement host needs to be connected to a 2-core single-mode optical fiber.
2. When applying, it is necessary to select sensing optical fibers/cables according to the application scenario:
For the application of leak monitoring in long oil and gas pipelines, special designed sensing optical cables can be considered, such as adding a sheath that is resistant to pressure, tensile, and easy to conduct heat, to facilitate timely response to external temperature changes;
For online monitoring applications of optoelectronic composite cables, the built-in communication optical fiber can be directly used as a sensor;
For the application of health monitoring of large civil engineering structures, it is necessary to choose sensing optical cables with smaller excess length. Please consult the manufacturer for specific fiber optic specifications.
About Us
Fuzhou Innovation Electric Scie&Tech Co.,Ltd. is a national high-tech enterprise with strong technical capabilities. It specializes in providing advanced intelligent temperature control equipment and fiber optic temperature measurement systems, and offers customers a complete set of online monitoring solutions. Guided by a philosophy of continuous technological refinement and innovative breakthroughs, we are dedicated to the R&D and manufacturing of fiber optic monitoring products within China, aiming to accelerate the development and technological advancement of optoelectronic products across various industrial sectors. Our products are widely applied in fields such as power, rail transit, new energy, petrochemicals, perimeter security, etc. Through years of efforts and accumulation, Inno has gained a good reputation in the field of optical fiber temperature measurement and is recognized by an increasing number of customers.
The company was established on June 11, 2011, with dry-type transformer temperature sensor as its technological core. It adheres to independent research and technological innovation, focusing on the research, development, and application of core technologies for intelligent monitoring systems. In the future, Inno will further deepen the transformation of technological achievements, actively expand domestic and international markets, promote the implementation of technological achievements to more extensive scenarios, and provide high-reliability intelligent monitoring solutions for more fields.
In June 2011, Inno was established. In August of the same year, new products were launched, and in October, it obtained the [OS900] quality system certification.
In 2012, We have established "industry-academia-research" partnerships with leading higher education institutions-including Fuzhou University, Fujian Chuanzheng Communications College, and Fuzhou Vocational Technical College-to form a dedicated R&D team.
In 2013, four invention patents and five utility model patents were applied for, and the company was awarded the title of "Excellent Patent Enterprise".
In 2016, the company was awarded the title of "National High-tech Enterprise" and its third-generation fiber optic temperature measurement product was launched onto the market
In 2017, Inno first cooperated with the Chinese Academy of Sciences on the fiber optic temperature measurement project and fully expanded into the field of rail transit.
In 2019, we won bids for multiple key projects such as the Wudongde Hydropower Station, China Mobile, Xiamen Metro, and Shenzhen Metro.
In 2021, with successful bids for projects such as East Hope, Xinte Energy, and Longi, Inno made a fully entry into the polysilicon new energy field.
In 2022, Inno awarded the "Technology Little Giant " and relocated to a new site. The fiber optic market has doubled in performance for several consecutive years.
In 2023, oil-filled transformer fiber optic temperature measurement was fully rolled out, with the number of invention patents increasing to 8 and utility models to 11.