Chinese Academy of Sciences

Peichao Zheng

Xianjun Tan

Weizhong Chen

Hongdan Yu

Jingqiang Yuan

Yun Zhou

Hongming Tian

Wusheng Zhao

Xuyan Tan

The present application discloses an intelligent frequency reading method applicable to a low-temperature environment and a wireless vibrating wire acquisition instrument. The intelligent frequency reading method includes the following steps: frequency pre-sweeping excitation: performing frequency pre-sweeping on a vibrating wire sensor by using the wireless vibrating wire acquisition instrument, if acquisition is successful, recording an acquisition frequency, and if the acquisition is not successful, entering frequency re-sweeping excitation, wherein the frequency re-sweeping excitation includes the following steps: primary voltage regulation: if the acquisition is not successful by the frequency pre-sweeping excitation, performing primary voltage regulation, increasing an excitation voltage until excitation is successful, and recording an excitation success voltage value; if the excitation is not successful by the primary voltage regulation, performing secondary voltage regulation, increasing the excitation voltage until the excitation is successful, and recording the excitation success voltage value.

Intelligent frequency reading method applicable to low-temperature environment and wireless vibrating wire acquisition instrument

The disclosure provides a vibrating wire compressive stress gauge and stress testing equipment suitable for use in low-temperature environments. By providing a stress trigger sleeve made of elastic material, the concrete structure of the lining itself expands when it is affected by high or low temperatures, extruding the stress trigger sleeve, and the extrusion force is offset through the elastic force of the elastic material, thereby preventing the expansion force from being transmitted to the vibrating wire assembly to generate stress signals that are caused by the self-expansion of the lining structure, which may cause measurement error. Specifically, the vibrating wire assembly is provided in the vibrating wire measurement space composed of a stress trigger sleeve and a pair of anchoring disks. When the lining is subjected to external stress, a certain internal force will be generated.

Vibrating wire stress gauge and stress testing equipment suitable for use in low temperature environments

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Wuhan, China

Peichao Zheng