Dodecahedral three-dimensional stress gage based on quantum dots
A three-way stress, dodecahedron technology, which is applied in the measurement of the change force of the optical properties of the material when it is stressed, can solve the problems of being susceptible to electromagnetic interference, inaccurate angle control, and low test accuracy. Achieve the effect of avoiding electromagnetic interference, easy operation and convenient use
Active Publication Date: 2016-09-21
CHONGQING UNIV
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Problems solved by technology
Chinese patent documents CN102620870A and CN 104075944A disclose several three-way pressure test devices, and these three-way pressure test devices have the following problems: 1. The three-way pressure test devices are based on sensory or vibrating wire earth pressure cells. The precision of the device is not high enough, it is susceptible to electromagnetic interference, the measuring range is not large enough, the stability is poor, and the reliability is low; 2. The three-way pressure test device uses two identical instruments to obtain six components at different angles, the operation is complicated, and the angle control is difficult. Accurate, making the test accuracy not high
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[0015] Below in conjunction with accompanying drawing and embodiment the present invention will be further described:
[0016] Such as figure 1 , figure 2 and image 3 As shown, the present invention includes a box body 1, the box body 1 is a regular dodecahedron, the six adjacent surfaces of the box body 1 are force-bearing surfaces 2, and one of each force-bearing surface 2 is covered by a box body upper cover 3 The groove 4 is provided with a fixing device 6 for installing the four-pin quantum dot polymeric nanocomposite column 5 in the groove 4, and the top of the four-pin quantum dot polymeric nanocomposite column 5 contacts the box body upper cover 3, The fixing device 6 is a square frame box, and the adjacent side walls of the fixing device 6 are respectively equipped with an excitation light introduction port 9 and a light wave detector 10. The spectrometer 8 is connected to the light wave detector 10 through an optical fiber 7, and the excitation light source 11 is...
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The invention discloses a dodecahedral three-dimensional stress gage based on quantum dots. The dodecahedral three-dimensional stress gage comprises a box body (1). The box body is in a dodecahedral shape. Six adjacent surface of the box body are stress surfaces (2). Each stress surface (2) is provided with a groove (4) covered by a box body upper cover (3). A fixing device (6) for installing a four-needle quantum dot poly-nano-composite column body (5) is arranged in each groove. The top part of the four-needle quantum dot poly-nano-composite column body contacts the box body upper cover (3). An exciting light guiding end (9) and a light wave detector (10) are respectively installed on two adjacent side walls of the fixing device (6). A spectrometer (8) is connected with the light wave detector (10) through an optical fiber (7). An exciting light source (11) is connected with the exciting light guiding end (9) through an optical fiber (7). The dodecahedral three-dimensional stress gage has the advantages that six stress components can be measured at one time, the measurement reliability is improved, and the measurement accuracy is improved.
Description
technical field [0001] The invention belongs to the technical field of geotechnical engineering pressure testing, and in particular relates to a dodecahedron three-way stress gauge based on quantum dots. Background technique [0002] The unidirectional stress test technology of a certain point on the surface or inside of an object is relatively mature. The conventional stress state consists of 3 normal stresses and 3 shear stresses, with a total of 6 components. Therefore, at least 6 unidirectional stress gauges are required to determine the stress state of a point. Using a one-way strain gauge will cause complicated work and inaccurate measurements. Therefore, the three-dimensional stress gauge is a necessary test device for measuring the three-dimensional stress state. [0003] At present, there are only a few pressure testing devices that can test the three-dimensional stress state in civil engineering stress testing, and these testing devices also require at least two ...
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Login to View More IPC IPC(8): G01L1/24
CPCG01L1/24
Inventor 周小平寿云东毕靖程浩王云腾肖睿胤何昊
Owner CHONGQING UNIV