Membrane structure pretension measuring instrument and method based on static pressure deformation
A measuring instrument and pretensioning technology, which is applied in the field of membrane structure pretensioning measuring instruments based on static pressure deformation, can solve the problems of lowering measurement accuracy, difficulty in obtaining it accurately, complicated operation process, etc., and achieves the effect of wide application range
Inactive Publication Date: 2015-09-09
CHENGDU UNIVERSITY OF TECHNOLOGY
View PDF4 Cites 15 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
However, because its measurement method is based on dynamic theory, its measurement data is highly random and difficult to obtain accurately during actual measurement, which will reduce its measurement accuracy; at the same time, its operation process is also relatively complicated during measurement
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0033] The present invention will be described in detail below in conjunction with the accompanying drawings.
[0034] The theoretical calculation model of the present invention is established on the basis of actual engineering. The basic idea is: at the position where the pretension needs to be measured on the membrane surface, first fix a rectangular boundary area. If the membrane material is an orthotropic material, the long and short sides of the rectangular boundary area should be parallel to the latitude and longitude of the membrane material; Then apply a uniform load q on the rectangular boundary area, so that the membrane surface deflects under the load, and measure the maximum deflection w max ; Finally, w max Substituting the measured theoretical calculation formula to obtain the pre-tension of the membrane material.
[0035] The derivation of the theoretical calculation formula is as follows:
[0036] The force model of the rectangular membrane structure support...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
| Property | Measurement | Unit |
|---|---|---|
| size | aaaaa | aaaaa |
Login to View More
Abstract
The invention relates to a membrane structure pretension measuring instrument and method based on static pressure deformation, comprising a measuring box with an opening, and a control box. The opening of the measuring box is covered by a membrane surface to be used for forming a membrane surface area boundary, wherein the measuring box is internally provided with a non-contact displacement sensor, and is externally provided with a vacuum pump and a pressure gage; the vacuum pump is in communication with the cavity of the measuring box, and is in connection with the pressure gage, and the pressure gage controls pressure in the vacuum pump; the control box is internally provided with a control circuit board, a central processor, a display screen, a power supply and a control switch, wherein the power supply is respectively in electric connection with the control circuit board, the display screen and the central processor; the central processor is respectively in electric or signal connection with the display screen and the non-contact displacement sensor; the control switch respectively controls opening and closing of the vacuum pump, the non-contact displacement sensor and the power supply. The membrane structure pretension measuring instrument and method are suitable for various membranes, can measure tension of membrane structures under different load effects, and have a wide range of application.
Description
technical field [0001] The invention belongs to the technical field of structural health monitoring and detection, and in particular relates to a membrane structure pretension measuring instrument and method based on static pressure deformation. Background technique [0002] Large membrane structures are mainly used in construction engineering, agricultural engineering and other fields. The stiffness of the membrane structure is usually achieved by applying pretension to the membrane material. The greater the pretension of the membrane material, the greater the stiffness of the membrane structure, and the stronger its ability to withstand external loads. However, the greater the pretension of the membrane, the higher the requirements for the construction tension equipment and the anchoring conditions of the boundary members, and the lower the strength reserve. However, if the pretension of the membrane material is too small, its out-of-plane rigidity will be too small. Und...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): G01L5/04
Inventor 刘长江阳小燕敖仪斌祁勇郑霞曾宇星青云杰杨少朋
Owner CHENGDU UNIVERSITY OF TECHNOLOGY