From September 24-26, 2019, Qingdao International Marine Science and Technology Exhibition (hereinafter referred to as "Hike Exhibition") was held in Qingdao International Expo Center. Daowan brought its self-developed, domestically controlled high-precision CTD with key technologies to the Haike Exhibition, which was highly praised by academician Wu Lixin.
Daowan Precision CTD
Introduction of Academician Wu Lixin
Wu Lixin, academician of the Chinese Academy of Sciences, director of the National Laboratory for Ocean Pilots, and vice president of Ocean University of China, has long been engaged in ocean circulation and climate research. Discovered the "hot spot" phenomenon in the western boundary current zone of the global ocean subtropical zone in the 20th century, systematically elaborated the mechanism of subtropical circulation variation in the interdecadal and long-term changes of the Pacific climate, and established relevant theories, and developed a middle-low latitude ocean -Model dynamic experiment system for the role of the atmospheric channel in the inter-decadal and long-term climate change; opened up a new path to study the global deep-sea oceanic low-frequency variability using the Argo International Plan, and pushed the deep-sea hybrid research to the global scale and above seasonal Time-varying scale; clarifies the dynamic path of ocean hot-salt circulation variation affecting the tropical sea-air coupling system, and reveals that the inter-decadal variation mode of the North Atlantic is the sea-air coupling mode. As of August 2019, he has published more than 140 papers in authoritative magazines such as Science, Nature, Nature Geoscience, Nature Climate Change, Journal of Physical Oceanography and other authoritative magazines.
Academician Wu Lixin has made systematic and innovative research on the basic theory of ocean circulation, ocean-atmosphere interaction and interdecadal climate change, and ocean mixing. It has important international influence in the field of ocean and climate research. The leap-forward development of disciplines has played an important role in leading and promoting.
The founder of Daowan Howard Chang had a cordial conversation with Academician Wu Lixin and Deputy Director Wang Xuedong
On September 25, 2019, accompanied by Deputy Director Wang Xuedong of the Qingdao Blue Silicon Valley Administration, Academician Wu Lixin visited this year's Hi-Tech Exhibition. When seeing Daowan's domestic CTD, Academician Wu Lixin stopped to watch with great interest and had an in-depth exchange with Daowan's founder Howard Chang on the development of domestic CTD technology.
Academician Wu Lixin pays attention to the development of Dawan CTD
Mr. Howard Chang, the founder of Daowan, introduced the company's technology status to Academician Wu Lixin
Academician Wu Lixin introduced the development direction of international ocean observation
Daowan founder Howard Chang introduced Daowan's future development plan to Academician Wu Lixin and Deputy Director Wang Xuedong
Mr. Howard Chang, the founder of Daowan, introduced Academician Wu Lixin in detail to Daowan's development status, business philosophy, technical level and future development plan. Academician Wu Lixin highly affirmed Daowan's key technology independent and controllable business policy and placed high hopes on Daowan's future development. Mr. Howard Chang also said that Dao Wan will never forget his original intention, bear in mind his mission, and go all out to do his own high-precision CTD.
Introduction of CTD
CTD (Conductivity, Temperature, Depth) is used to measure the electrical conductivity, temperature and depth of three basic physical parameters of water. Based on these three parameters, you can also calculate various other physical parameters, such as sound velocity and density. Thermo-salt depth gauges are necessary equipment for marine surveys and the most critical and basic instruments for marine surveys.
Brand History
Zhang Wanhao, founder of Daowan, graduated from Ocean University of China in 2004 and obtained a Master of Business Administration (EMBA) from Tsinghua University in July 2019. He has been engaged in the introduction of international advanced marine instruments and equipment for many years and is familiar with the current international Advanced marine survey instruments and equipment, master the most cutting-edge marine technology trends and market conditions.
Mr. Howard Chang saw the huge domestic CTD market demand and the status of international brands monopolizing the domestic market. In order to respond to the two national strategies of "ocean power" and "manufacturing power", we decided to invest heavily in the development of high-precision CTD technology to contribute to the great rejuvenation of the Chinese nation!
Qingdao Daowan Technology Co., Ltd. was established in October 2016 and its registered place is Qingdao Ocean Sensor Industrial Technology Research Institute (Qingdao Blue Silicon Valley). The company focuses on independent technology research and development, product manufacturing and technical services of high-precision CTD, especially the research and development of products suitable for extreme water environment (deep sea, polar region).
Before 2017, the domestic CTD market was basically monopolized by international brands. Starting from 2017, Qingdao Daowan Technology Co., Ltd. is committed to "creating a national brand and breaking foreign monopolies" under the slogan "Do Chinese own high-precision CTD". Over the past two years, Daowan has gradually mastered all the core technologies of high-precision CTD through independent research and development, which truly broke the situation of foreign brands monopolizing the Chinese market.
rank in the field
Daowan is "China's first high-precision CTD manufacturer". Daowan fully masters the core technologies of CTD R & D and manufacturing (circuit design, sensor packaging, high-precision calibration), all core components are purchased domestically or developed independently, and the localization rate of the entire machine is 99%.
techinque level
At present, the accuracy of Daowan temperature salt depth sensors (temperature ± 0.01 ℃, conductivity ± 0.02mS / cm, pressure ± 0.1% FS) can reach the first level of national measurement standards and marine survey specifications, and can meet most of the ( > 90%) requirements for marine environment monitoring.
Technical parameters of Daowan ’s CTD core sensor
Temperature (independently developed by Daowan)
Measurement range: -5 ～ 36 ℃
Measurement accuracy: ± 0.01 ℃
Resolution: 0.001 ℃
Conductivity (independently developed by Daowan)
Measurement range: 0 ～ 70mS / cm
Measurement accuracy: ± 0.02mS / cm
Resolution: 0.001mS / cm
Pressure (domestic)
Measurement range: 0 ～ 1000dbar
Measurement accuracy: ± 0.1% F.S.
Resolution: 0.01% F.S.
Calibration system of high-precision thermo-salt depth gauge
After more than two years of exploration, in May 2019, Daowan built a high-precision temperature and salt depth instrument calibration system. Through the operation of two-level temperature control water tank, the temperature control accuracy reached ± 0.00175 ℃, thus ensuring the sensor High-precision calibration. In the next step, the company is about to develop a set of thermostatic water bath with temperature control accuracy of ± 0.0002 ℃ to meet the needs of higher precision product calibration.
Daowan high-precision CTD calibration system
Industry Significance
Since the company was established 2 years ago, it has sold hundreds of sets of products. Customers include Ocean University of China, China Shipbuilding Industry Corporation 715 Research Institute, National Marine Environmental Monitoring Center of the Ministry of Ecology and Environment, Harbin Engineering University, Nanhai Institute of Oceanography, Chinese Academy of Sciences Well-known marine research institutions such as the First Institute of Oceanography, Ministry of Resources, and a small number of foreign professional clients in South Korea and Germany.
The price of Daowan products is about 30% of the imported products with the same performance, which has saved millions of dollars in scientific research funds for domestic researchers and government departments in the past two years. Daowan really broke the monopoly of foreign CTD brands on the Chinese market and filled the gap in domestic temperature and salt depth technology, giving Chinese users and even users around the world more and better choices.
