From September 4 to 8, 2017, a team of 10 faculty and students from the Department of Disaster Prevention Instrumentation, Institute of Disaster Prevention, visited Beijing Geodevice Instrument & Equipment Co., Ltd. for internship and exchange activities. The internship mainly covered the principles, testing and calibration of seismometers and accelerometers. Director Hong from the Department of Disaster Prevention Instrumentation also participated in the exchange.
On the morning of September 4, teachers Yao Zhenjing and Han Zhiming led eight postgraduate students of the department to arrive at Geodevice for a one-week internship exchange. At the opening ceremony, Manager Liu Minghui from the Exploration Department, on behalf of Geodevice, extended a warm welcome to the faculty and students, briefed them on the company overview, and expressed the hope that all participants could gain valuable insights from the internship. On behalf of the faculty and students, Teacher Yao Zhenjing thanked Geodevice for its arrangement.
Afterwards, the visiting group toured the R&D, production and testing departments of the company.
Manager Ye Peng of the Seismometer Department introduced the production and processing of seismometers.
Manager Li Jiang of the Data Acquisition Department presented the production and processing workflow of data acquisition equipment.
Manager Liu Minghui introduced new-type seismographs, geophones as well as product appearance design concepts.
On the morning of September 5, Researcher Wang Hongti delivered systematic training on seismometer testing. The curriculum covered a wide range of topics: measurement of damping and natural period of seismometers, magnitude-frequency characteristics, total harmonic distortion; determination of sensitivity, magnitude-frequency characteristics, transverse suppression ratio and linearity of seismometers / accelerometers using vibration shakers; working status inspection and fault diagnosis for seismometers and borehole seismometers. Special elaboration was provided on temperature drift testing, which drew strong interest from the participants.
Researcher Wang Hongti delivering lectures
From the afternoon of September 5 to the morning of September 6, Researcher Wang Hongti guided the faculty and students in the company’s vibration laboratory to measure key parameters of borehole short-period seismometers developed by the Institute of Disaster Prevention.
Teacher Han conducting tests on the vibration shaker
On the afternoon of September 6, Dr. Lin Zhan from the Software Department of Geodevice gave a lecture focusing on seismometer calibration principles and hands-on practices for seismometer testing and calibration. Students raised active questions and took detailed notes throughout the session.
Dr. Lin Zhan delivering lectures
On September 7, Researcher Xue Bing, leader of Geodevice, provided training on seismograph principles and led technical discussions. After several days of training, faculty and students showed growing enthusiasm and put forward questions regarding platform noise measurement and topics related to their respective research directions. Teacher Yao Zhenjing commented that she benefited tremendously and hoped to attend more lectures by Researcher Xue in the future. She conveyed sincere gratitude to him on behalf of all participants.
Mr. Xue delivering lectures to faculty and students from Institute of Disaster Prevention
On the morning of September 8, Professor Tong Wanglian, senior expert at Geodevice, conducted internship training covering four themes: 1.Transfer functions (zero-pole parameters) of seismometers and their measurement; 2.Self-noise testing of broadband seismometers and stability characterization; 3.Measurement of Earth’s free oscillation frequencies using broadband seismometers and verification of measurement deviations; 4.Extraction of earth tide information from seismic data and comparison with theoretical earth tides to evaluate long-term operational stability of broadband seismometers. Professor Tong is a senior expert in seismic observation in China, one of the pioneers and long-term practitioners engaged in digital seismic observation, with extensive experience in seismic observation research and testing applications. Faculty and students stated that they felt greatly honored to attend Professor Tong’s lecture and gained abundant knowledge, and expressed their respect to him.
Professor Tong Wanglian delivering lectures
On the afternoon of September 8, Manager Zhou Yinxing from the Marketing & Service Department summarized the internship activities. On behalf of the company, Manager Zhou extended another welcome and expressed thanks to the visiting team, and proposed strengthening multi-faceted cooperation and exchanges in the future. On behalf of all faculty and students, Teacher Han Zhiming delivered sincere appreciation. He noted that this precious internship training broadened their horizons beyond classroom teaching, thanked Geodevice for providing this opportunity, and looked forward to more cooperation and exchanges ahead.
Manager Zhou Yinxing delivering closing remarks
At the end of the meeting, Manager Zhou Yinxing and other representatives of Geodevice issued training certificates to the faculty and students.
Geodevice representatives presenting training certificates to participants from Institute of Disaster Prevention
Upon completion of the internship, faculty and students from Institute of Disaster Prevention took a group photo with some Geodevice staff in the lobby on the first floor of the company building.
