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A temperature compensation and inter-dimensional decoupling method for a pore pressure static sounding probe

A technology of hole pressure static penetration and temperature compensation, which can be used in force/torque/work measuring instruments, mitigating undesired effects, special data processing applications, etc. Influence and other problems, to achieve the effect of solving the problem of temperature influence and inter-dimension coupling, and realizing the real output of the load

Active Publication Date: 2019-05-17
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 temperature compensation and inter-dimensional decoupling method for a pore pressure static sounding probe
  • A temperature compensation and inter-dimensional decoupling method for a pore pressure static sounding probe
  • A temperature compensation and inter-dimensional decoupling method for a pore pressure static sounding 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 ...

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Abstract

The invention discloses a temperature compensation and inter-dimensional decoupling method for a pore pressure static sounding probe. The method comprises the steps of firstly establishing a temperature compensation model according to the measurement modes of a multifunctional pore pressure static sounding probe and a three-channel sensor, taking the output of the multifunctional pore pressure static sounding probe as sample data, obtaining the model parameters through regression, and carrying out the temperature compensation; secondly, according to the working principle of the multifunctionalpore pressure static sounding probe, analyzing the relationship between the load of the multifunctional pore pressure static sounding probe and the output of the multifunctional pore pressure staticsounding probe sensor, establishing a nonlinear regression model, taking the output of the multifunctional pore pressure static sounding probe as an initial sample, returning model parameters by adopting a least square method, and carrying out nonlinear decoupling. According to the present invention, the problems of temperature influence and dimensional coupling of the multifunctional pore pressure static sounding probe are solved, and the real load output of the multifunctional pore pressure static sounding probe is achieved.

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 Applications(China)
IPC IPC(8): G06F17/50G01L5/00G01D3/028
Inventor 秦文虎郭文科孙立博
Owner SOUTHEAST UNIV
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