Simple calibration device for miniature small range pore water pressure sensor in water medium

Abstract

The invention discloses a simple calibrating device of a mini-sized small measuring range pore water pressure sensor in aqueous medium belonging to the geotechnical engineering pore water pressure device related field. The device comprises a pore water pressure sensor fixing device, an organic glass cylindrical device, and a device pedestal. The pore water pressure sensor fixing device is formed by a rigid long rod and a disc, which are vertically fixedly connected together. The rigid long rod is used for fixing the lead of the pore water pressure sensor, and the disc is used for fixing the pore water pressure sensor. The organic glass cylindrical device is the main body device of the calibrating pore water pressure sensor, and the bottom part valve can be used to control the elevating of the water level in the cylinder, and then the loading and unloading of the pore water pressure sensor can be realized. The water level value can be read directly by the scale lines on the cylinder, and the value of the corresponding water pressure applied on the pore water pressure sensor can be obtained. The device provided by the invention is advantageous in that the structure is simple, the operation is facilitated, and the calibrating problem of the mini-sized small measuring range pore water pressure sensors having various sizes in the aqueous medium can be solved.

Description

technical field

[0001] The invention relates to a sensor calibration device, in particular to a simple calibration device for a miniature small-scale pore water pressure sensor in an aqueous medium, which can be used for calibration of a pore water pressure sensor for measuring pore water pressure values ​​in indoor model tests. Background technique

[0002] In the field of geotechnical engineering of groundwater, especially in the foundation pit engineering near the river and sea, underwater tunnel engineering and foundation treatment engineering, the problem of pore water pressure in the soil has always been a problem of general concern, so a lot of it is related to the above actual projects Relevant indoor model tests will involve testing and research on the magnitude and distribution of pore water pressure, and the calibration of pore water pressure sensors is often involved in the test research process. Pore ​​water pressure sensors often use gas scales when leaving the...

Examples

Embodiment Construction

[0021] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0022] Such as figure 1 As shown, the present invention provides a simple calibration device for miniature and small-scale pore water pressure sensors in water media, including a pore water pressure sensor fixing device 1, a plexiglass cylinder device 2 and a device base 3; the cylinder device 2 It consists of a plexiglass cylinder 2-1, a scale 2-2 and a bottom valve 2-3. The device base 3 is placed horizontally, and the plexiglass cylinder 2-1 is vertically fixed on the device base 3 and sealed with the device base 3. Connect to ensure that the water in the plexiglass cylinder 2-1 will not seep out, and the device base 3 can adopt a plexiglass base. The side wall of the plexiglass cylinder 2-1 is provided with a scale 2-2, and the bottom is provided with a valve 2-3. The valve 2-3 can be a copper core valve for controlling the rise and fall of the wat...

technical field

[0001] The invention relates to a sensor calibration device, in particular to a simple calibration device for a miniature small-scale pore water pressure sensor in an aqueous medium, which can be used for calibration of a pore water pressure sensor for measuring pore water pressure values ​​in indoor model tests. Background technique

[0002] In the field of geotechnical engineering of groundwater, especially in the foundation pit engineering near the river and sea, underwater tunnel engineering and foundation treatment engineering, the problem of pore water pressure in the soil has always been a problem of general concern, so a lot of it is related to the above actual projects Relevant indoor model tests will involve testing and research on the magnitude and distribution of pore water pressure, and the calibration of pore water pressure sensors is often involved in the test research process. Pore ​​water pressure sensors often use gas scales when leaving the...

Examples

Embodiment Construction

[0021] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0022] Such as figure 1 As shown, the present invention provides a simple calibration device for miniature and small-scale pore water pressure sensors in water media, including a pore water pressure sensor fixing device 1, a plexiglass cylinder device 2 and a device base 3; the cylinder device 2 It consists of a plexiglass cylinder 2-1, a scale 2-2 and a bottom valve 2-3. The device base 3 is placed horizontally, and the plexiglass cylinder 2-1 is vertically fixed on the device base 3 and sealed with the device base 3. Connect to ensure that the water in the plexiglass cylinder 2-1 will not seep out, and the device base 3 can adopt a plexiglass base. The side wall of the plexiglass cylinder 2-1 is provided with a scale 2-2, and the bottom is provided with a valve 2-3. The valve 2-3 can be a copper core valve for controlling the rise and fall of the wat...

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