Automatic cutting data recorder

Abstract

The invention relates to the technical field of in-situ shear test equipment, in particular to an automatic shear data recorder. Comprising a data acquisition device and a data processing device, the data acquisition device comprises a displacement sensor, a signal converter, a medium transmitter and an acquisition box, and the data processing device comprises a communication interface, a display screen and a processor. A transmission light path of a data signal in a colloid medium is sheared to collect step change of the signal, even in complex environments such as poor light of an external environment, the medium transmitter can still work normally, and finally shear data with quick response can be obtained in the complex environments; through the signal processing module and the signal gain module, the anti-interference capability of the sheared data signal can be enhanced by using the modulation gain, so that the sheared data is more accurate.

Description

technical field [0001] The invention relates to the technical field of in-situ shear testing equipment, in particular to an automatic shear data recorder. Background technique [0002] The in-situ rock drilling shear instrument is a test device for measuring the internal friction angle φ and cohesion c of the rock on site, which belongs to a kind of rock in-situ test; Lower to a certain depth, and apply oil pressure to press the rock drilling shear head into the borehole wall to form normal stress, then pull the steel rod connected to the shear plate to apply shear stress, so that the embedded rock drilling shears The rock mass at the head is directly sheared, and the shear strength of the rock mass is calculated by reading the normal stress corresponding to the maximum shear stress when the instrument panel is damaged. [0003] It should be noted that the test data is transmitted to the shear instrument panel through the hydraulic module, and the normal stress and shear st...

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Problems solved by technology

[0003] It should be noted that the test data is transmitted to the shear instrument panel through the hydraulic module, and the normal stress and shear stress information of the rock can be obtained by reading the instrument panel. When applying normal stress and shear stress, it is necessary to pay attention to the instrument panel at all times. The degree of automation If the data is low, the data will often be missed or misread, resulting in the distortion of the obtained internal friction angle and cohesion, and the shear strength of the rock cannot be accurately obtained.

[0004] It should also be noted that the data collection of the automatic recording instrument takes time as the collection interval, that is, one data is collected every Δt time, and the collection speed is fixed. During the rock shear test, when the shear load is small, In a long period of time, the displacement change is small, and only a slow acquisition speed is required to collect a small amount of data. When the rock is sheared and damaged, the displacement changes greatly in a short period of time. When the time is high, a high acquisition speed is required to collect a large amount of data. If the acquisition speed controlled by time Δt is used to collect data at a high speed from the beginning of the test to the end of the test, the amount of data will be large. Under the premise of a sharp increase in data signals , will increase the response speed of the recorder, thereby affecting the recorded shear data

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