A Method of Temperature Compensation and Dimension Decoupling for CPT Probe

A technology of pore pressure static penetration and temperature compensation, which is applied to force/torque/power measuring instruments, reducing undesired effects, instruments, etc., and can solve problems such as the temperature influence of multi-functional pore pressure static penetration probes , to solve the problem of temperature influence and inter-dimensional coupling, and realize the effect of real load output

Active Publication Date: 2022-04-08
SOUTHEAST UNIV
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Problems solved by technology

[0004] Purpose of the invention: According to the deficiencies of the above-mentioned prior art, the present invention provides a method for temperature compensation and inter-dimensional decoupling of piezostatic penetration probes, which solves the temperature influence of multi-functional piezostatic penetration probes and Inter-dimensional coupling problem, realizing the real output of multi-functional piezostatic penetration probe load

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  • A Method of Temperature Compensation and Dimension Decoupling for CPT Probe

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[0029] In order to describe the technical solution disclosed in the present invention in detail, further elaboration will be made below in conjunction with the accompanying drawings and specific embodiments.

[0030] see Figure 1 to Figure 5 As shown, a temperature compensation and inter-dimensional decoupling method suitable for multi-functional piezostatic penetration probes includes the following steps:

[0031] Step1: According to the working principle of the three-channel sensor of the multi-functional piezostatic penetration probe, establish a mathematical model that the sensor output is affected by temperature:

[0032]

[0033] In formula (1), ΔT=T-T 0 is the difference between the actual temperature and the standard temperature; F O =(F XO ,F YO ,F ZO ) T is the output of the three-channel sensor at the actual temperature; F S =(F XS ,F YS ,F ZS ) T is the output of the three-channel sensor at the standard temperature when the load is the same, when ΔT=...

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Abstract

The invention discloses a method for temperature compensation and inter-dimensional decoupling of a pore pressure static penetration probe. This method first establishes a temperature compensation model based on the measurement methods of the multi-functional piezostatic penetration probe and the three-channel sensor, and uses the output of the multi-functional piezostatic penetration probe as sample data to regress the model parameters for temperature compensation. . Secondly, according to the working principle of the multifunctional piezostatic penetration probe, the relationship between the load of the multifunctional piezostatic penetration probe and the sensor output of the multifunctional piezostatic penetration probe is analyzed, and a nonlinear regression is established The output of the multi-functional piezostatic penetration probe is used as the initial sample, and the model parameters are regressed by the least square method for nonlinear decoupling. The invention solves the problems of temperature influence and inter-dimensional coupling of the multi-functional piezostatic penetration probe, and realizes the real load output of the multi-functional piezostatic penetration probe.

Description

technical field [0001] The invention belongs to geotechnical engineering technology, in particular to a method for temperature compensation and inter-dimensional decoupling of a pore pressure static penetrating probe. Background technique [0002] Static penetration testing is to use static force to press the probe into the soil at a uniform speed at a certain rate, and continuously measure its penetration resistance (cone tip resistance, side wall friction resistance and pore water pressure). Static penetration testing is a simple, fast, accurate and economical in-situ testing method for geotechnical engineering. In this test method, the acquisition parameters of cone tip resistance, side wall friction resistance and pore water pressure are obtained by indoor calibration. The principle is to apply loads to a single channel step by step, read the sensor output of this channel, and finally fit the channel A linear relationship curve between sensor output and input. [0003]...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/20G01L5/00G01D3/028
Inventor 秦文虎郭文科孙立博
Owner SOUTHEAST UNIV
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