Heilongjiang Metrology Institute successfully developed high-precision marine gravimeter

[ China Instrument Network Instrument R&D ] Recently, the Heilongjiang Provincial Metrology and Testing Institute has conducted calibration tests for the CHZ-IIM marine gravimeter developed by the Institute of Geodesy and Geophysics of the Chinese Academy of Sciences, and completed the extremely cold and low temperature environment with the R&D personnel. Reliability and stability testing work.

The completion of this test project has improved the quality and performance of geodetic survey equipment in China, and is of great significance to earth science research, marine resource exploration, and defense military applications.

During the calibration test of the marine gravimeter, the Heilongjiang Metrological Testing and Testing Institute not only provided the absolute gravity value of the detection point, but also calibrated the measured value of the instrument at high latitudes to ensure the measurement accuracy of the instrument. . Since the marine gravimeter needs to be measured globally, in order to ensure normal operation in the harsh environment of the north and south poles, the gravimeter is also tested for reliability and stability under extremely cold conditions. The test results show that the instrument can work normally at a low temperature of -20 Â° C, and gives sufficient range and measurement accuracy of 1 mGal.

The marine gravimeter is the core equipment for acquiring the information of the ocean gravity field. It can reach almost all the sea areas except the two poles. It has strong adaptability to meteorological conditions such as weather and sea conditions. It is a fast and efficient acquisition of high-precision, high-resolution ocean gravity at this stage. The most effective technical approach to field information, the CHZ-IIM marine gravimeter is based on the zero-long spring sensor technology of the axisymmetric structure and has complete independent intellectual property rights. The successful development of this instrument has broken the long-term dependence of China's high-precision marine gravimeter. The situation of imports.

(Original title: Our metrology department has the ability to provide calibration tests for marine gravimeters developed by the Chinese Academy of Sciences)

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