CN113758622A - Method for manufacturing disturbance stress sensor - Google Patents
Method for manufacturing disturbance stress sensor Download PDFInfo
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- CN113758622A CN113758622A CN202110924147.XA CN202110924147A CN113758622A CN 113758622 A CN113758622 A CN 113758622A CN 202110924147 A CN202110924147 A CN 202110924147A CN 113758622 A CN113758622 A CN 113758622A
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 44
- 238000000034 method Methods 0.000 title claims abstract description 26
- 238000005259 measurement Methods 0.000 claims abstract description 112
- 239000000463 material Substances 0.000 claims abstract description 38
- 238000012360 testing method Methods 0.000 claims abstract description 28
- 238000009434 installation Methods 0.000 claims abstract description 11
- 238000002360 preparation method Methods 0.000 claims abstract description 9
- 238000005498 polishing Methods 0.000 claims abstract description 7
- 239000010687 lubricating oil Substances 0.000 claims abstract description 6
- 239000003755 preservative agent Substances 0.000 claims abstract description 5
- 230000002335 preservative effect Effects 0.000 claims abstract description 5
- 230000001680 brushing effect Effects 0.000 claims abstract description 4
- 239000011435 rock Substances 0.000 description 9
- 238000000465 moulding Methods 0.000 description 5
- 238000004364 calculation method Methods 0.000 description 4
- 239000000835 fiber Substances 0.000 description 4
- 239000011148 porous material Substances 0.000 description 4
- 238000009826 distribution Methods 0.000 description 3
- 239000003292 glue Substances 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 238000010146 3D printing Methods 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
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- 238000003754 machining Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000013307 optical fiber Substances 0.000 description 2
- 239000000741 silica gel Substances 0.000 description 2
- 229910002027 silica gel Inorganic materials 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000009960 carding Methods 0.000 description 1
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- 238000007711 solidification Methods 0.000 description 1
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- 238000009662 stress testing Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/0028—Force sensors associated with force applying means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/20—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress
- G01L1/22—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress using resistance strain gauges
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Abstract
The invention discloses a method for manufacturing a disturbance stress sensor. The method comprises the following steps: determining a pouring material according to geological conditions; step two: manufacturing a mould; step three: brushing lubricating oil or paving a preservative film on the die; step four: preparing a strain measurement module; pouring the pouring material in the step one on a mold, manufacturing a strain measurement module and polishing; step five: installing a strain measurement element on the strain measurement module, and fixing and protecting the data line; step six: preparing a sensor filling body; pouring the pouring material in the first step on the periphery of the strain measurement module to form a regular hexahedron sensor filling body, and completing the preparation of the disturbance stress sensor; connecting the disturbance stress sensor with a strain test system, and inspecting the disturbance stress sensor; step seven: and (5) field installation and use. The invention has the advantages of simple structure, convenient manufacture, low cost and accurate measurement result.
Description
Technical Field
The invention relates to the technical field of geotechnical measurement, in particular to a manufacturing method of a disturbance stress sensor.
Background
The existing disturbance stress test sensor and equipment have the defects that the size of the sensor and the equipment is generally large and basically exceeds 50cm due to different test principles and arrangement structures of matched components. For the stress state of surrounding rocks under excavation or construction disturbance, stress redistribution can form a larger stress gradient in shallow surrounding rocks, and large-size sensors and equipment directly cause that the stress change of the shallow layer cannot be measured. In addition, patent application CN201810599551.2, entitled "unit body method and apparatus for measuring disturbance stress" proposes a method and apparatus for measuring disturbance stress based on unit stress analysis, and the measurement principle is that the external force applied to the sensor is obtained by measuring the strain of the sensor during the deformation process of the applied force and performing inverse calculation according to the elastic mechanics solution of the unit block, and then the distribution of disturbance stress is obtained by the strain variation; the sensor provided based on the test method has smaller size and can realize accurate stress measurement, but the pore channel is narrow and the spatial distribution is complex, and the problem that the installation of a strain measurement element (such as a strain gauge, a fiber grating and the like) is difficult may exist in the application process.
Therefore, in order to test the stress variation condition of the surrounding rock under excavation or construction disturbance more finely, accurately, simply and quickly, it is necessary to develop a disturbance stress test sensor which is accurate in disturbance stress test and convenient for installing a strain measurement element.
Disclosure of Invention
The invention aims to provide a manufacturing method of a disturbance stress sensor, which has the advantages of small size, simple structure, convenient manufacturing, convenient installation of a strain measurement element, low cost and accurate disturbance stress test result, and is suitable for various disturbance stress test environments.
In order to achieve the purpose, the technical scheme of the invention is as follows: the manufacturing method of the disturbance stress sensor is characterized by comprising the following steps: comprises the following steps of (a) carrying out,
the method comprises the following steps: determining a pouring material;
step two: manufacturing a mould;
step three: brushing lubricating oil or laying a preservative film on the mould;
step four: preparing a strain measurement module;
pouring the pouring material in the step one on the die in the step four, manufacturing a strain measurement module and polishing;
step five: installing a strain measurement element on the strain measurement module, and fixing and protecting the data line;
step six: preparing a sensor filling body;
pouring the pouring material in the first step on the periphery of the strain measurement module to form a regular hexahedron sensor filling body, and completing the preparation of the disturbance stress sensor;
connecting the disturbance stress sensor with a strain test system, and inspecting the disturbance stress sensor;
step seven: and (5) field installation and use.
In the above technical scheme, in the second step, the mold is split up and down; an inner cavity is arranged in the die; the inner cavity is a special-shaped octahedron;
the die comprises an upper die plate and a lower die plate; a pouring opening is reserved in the upper plate of the mold; the upper die plate and the lower die plate are fixedly connected through bolts.
In the above technical solution, in the fourth step, the strain measurement module is shaped like a special octahedron.
In the technical scheme, in the sixth step, the strain measurement module is suspended and fixed on the bracket by adopting a thin wire, and the sensor filling body is poured on the periphery of the strain measurement module by adopting the pouring material in the first step;
after the pouring is finished, the strain measurement module is located in the center of the sensor filling body, and the square on the top of the strain measurement module is parallel to the outer side face of the sensor filling body.
In the above technical solution, in the sixth step, the disturbance stress sensor includes a strain measurement module, a strain measurement system, and a sensor filling body;
the strain measurement system is arranged on the outer wall of the strain measurement module;
the sensor filling body is arranged on the periphery of the strain measurement module and positioned outside the strain measurement system.
In the technical scheme, an octahedral prism surface is arranged on the outer wall of the strain measurement module;
the strain measurement system is installed on the octahedral prism surface.
In the technical scheme, the sensor filling body is wrapped on the periphery of the strain measurement module;
an octahedral top square plane is arranged on the outer wall of the strain measurement module; a plurality of octahedron facets are connected through the octahedron top square plane;
the outer wall of the sensor filling body is provided with a hexahedral plane;
the square plane at the top of the octahedron and the hexahedron plane are arranged in parallel.
In the technical scheme, a filling body edge is arranged on the sensor filling body;
and the edge of the filling body is provided with a fillet structure.
The invention has the following advantages:
(1) the invention adopts the form of combining the special-shaped octahedron and the strain measurement system, prepares the special-shaped octahedron which accords with the geological condition of the target test point, installs the strain measurement element on the special-shaped octahedron, and pours the whole body into a regular hexahedron to measure the disturbance stress on site, has small size, simple structure, convenient manufacture, convenient installation of the strain measurement element, low cost and accurate disturbance stress test result, and is suitable for being applied to various disturbance stress test environments;
(2) the strain measurement module is a special-shaped octahedron, the surface of the edge surface of the octahedron is smooth, the strain measurement element is installed on the flat edge surface of the vehicle, the operation is simple and convenient, and the strain measurement module is ensured to be tightly connected with the strain measurement element.
Drawings
Fig. 1 is a schematic structural diagram of a strain measurement module according to the present invention.
Fig. 2 is a schematic view of a connection structure of the strain measurement module and the strain measurement system according to the present invention.
Fig. 3 is a schematic structural view of the mold of the present invention.
Fig. 4 is a perspective structural diagram of a disturbance stress sensor in the present invention.
X, y, and z in fig. 1, 2, and 4 are three-dimensional coordinate systems.
In the figure, 1-strain measurement module, 1.1-strain measurement module body, 1.2-prism surface, 1.3-octahedron top square plane, 1.3A-first square plane, 1.3B-second square plane, 1.3C-third square plane, 1.3D-fourth square plane, 3-strain measurement system, 4-sensor filling body, 4.1-hexahedron plane, 4.1A-first plane, 4.1B-second plane, 4.1C-third plane, 4.1D-fourth plane, 4.2-fillet structure, 4.3-filling body edge, 5-disturbance stress sensor, 6-die, 6.1-die upper plate, 6.2-die lower plate, 6.3-pouring opening, 6.4-inner cavity.
Detailed Description
The embodiments of the present invention will be described in detail with reference to the accompanying drawings, which are not intended to limit the present invention, but are merely exemplary. While the advantages of the invention will be clear and readily understood by the description.
With reference to the accompanying drawings: the manufacturing method of the disturbance stress sensor comprises the following steps,
the method comprises the following steps: determining a pouring material according to geological conditions (determining main geological condition parameters of the material including rigidity, strength, molding conditions and the like); different materials are selected under different geological conditions, so that the deformation coordination of the manufacturing materials and the formation surrounding rock is ensured; the pouring material comprises soft glue, resin and cement paste, and is a purchased product;
step two: manufacturing a mould; manufacturing a corresponding die to ensure the rapid molding of the special-shaped octahedron and smooth surface; the mold can be made by 3D printing (resin) or machining (metal) (the manufacturing method is prior art), the cross section of the mold is shown in fig. 3;
step three: brushing lubricating oil or laying a preservative film on the mould;
before pouring, lubricating oil is smeared or demolding materials are paved on the inner side of the mold, so that smooth demolding and smooth surface after pouring are ensured;
step four: preparing a strain measurement module;
pouring the pouring material in the step one on the die in the step four, manufacturing a strain measurement module 1 and polishing;
step five: installing a strain measurement element on the strain measurement module 1, performing silica gel protection, and fixing a protection data line; the strain measurement element comprises a strain gauge or a fiber grating and the like;
step six: preparing a sensor filling body;
pouring the pouring material in the first step on the periphery of the strain measurement module 1 to form a regular hexahedral sensor filling body 4, and completing the preparation of a disturbance stress sensor 5 (as shown in fig. 4);
connecting the disturbance stress sensor 5 with a strain test system, and inspecting the disturbance stress sensor 5;
step seven: and (5) field installation and use.
The invention has simple structure, convenient manufacture, convenient installation of the strain measuring element, low cost and accurate disturbance stress test result, and is suitable for various disturbance stress test environments.
The disturbance stress sensor 5 is directly installed at a target point position, disturbance stress calculation is carried out through surrounding rock body deformation monitoring, in order to guarantee testing accuracy, the sensor and the surrounding rock body of the target point position need to be adjusted to the greatest extent, therefore, different sensor manufacturing materials need to be selected according to different geological conditions, and the general principle of material selection is as follows: firstly, the deformation capacity of the material is matched with a surrounding rock body of a target point position, namely the rigidity of the selected material is required to be adjusted according to the rigidity of the surrounding rock body; secondly, the sensor needs to keep the whole linear elasticity state all the time in the deformation process, and based on the linear elasticity state, the disturbance stress of the surrounding rock body can be calculated by adopting an elasticity theory; thirdly, the selected material has better interface compatibility, namely better contact and bonding are formed by twice pouring, so that the integral stress and deformation of the regular hexahedron can be still kept after the pouring is finished; and finally, comprehensively considering the factors such as the molding condition, the solidification time, the cost and the like of the selected material, determining the pouring material, and determining the proportion of the pouring material according to the factors in the aspects of the mixed preparation material. The pouring material in the invention is preferably soft glue, resin or cement paste. The proportion of the pouring material in the invention is adjusted according to the geological conditions used, and the proportion and the adjustment mode are the prior art.
Further, in the second step, the die 6 is of a vertically split structure, and an inner cavity 6.4 is arranged inside the die 6; the inner cavity 6.4 is a special-shaped octahedron; here, the shaped octahedron refers to an octahedron obtained by grinding all edges of a conventional octahedron to be flat. The invention adopts the special-shaped octahedron to ensure that the direction of strain measurement is fixed, and the strain is measured in the direction of the prism surface, so that the subsequent stress back calculation is more convenient.
The die 6 comprises an upper die plate 6.1 and a lower die plate 6.2; a pouring opening 6.3 is reserved on the upper plate 6.1 of the die; the upper die plate 6.1 and the lower die plate 6.2 are fixedly connected through bolts (as shown in fig. 3), so that smooth demolding is ensured.
Further, in step four, the strain measurement module 1 is shaped like a special octahedron (as shown in fig. 1 and fig. 2).
Further, in the sixth step, the strain measurement module 1 is suspended and fixed on a bracket by adopting a thin wire, and the sensor filling body 4 is poured on the periphery of the strain measurement module 1 by adopting the pouring material in the first step;
after the pouring is finished, the strain measurement module 1 is located in the center of the sensor filling body 4, and the square on the top of the strain measurement module 1 is parallel to the outer side face of the sensor filling body 4 (as shown in fig. 4), so that the local stress concentration in the testing process is weakened, the stress uniformity of the sensor is ensured, and the accuracy of a disturbance stress testing result is improved.
Further, in step six, the disturbance stress sensor 5 comprises a strain measurement module 1, a strain measurement system 3 and a sensor filling body 4;
the strain measurement system 3 is arranged on the outer wall of the strain measurement module 1;
the sensor filling body 4 is disposed on the outer periphery of the strain measurement module 1 and outside the strain measurement system 3 (as shown in fig. 1, 2, and 4).
Further, the strain measurement module 1 is a solid structure; the strain measurement module 1 comprises a strain measurement module main body 1.1 and an octahedral prism surface 1.2,
the outer wall of the strain measurement module main body 1 is provided with an octahedral prism surface 1.2;
the strain measurement system 3 is arranged on an octahedral prism surface 1.2 (shown in figures 1 and 2), the prism surface is flat, and the strain measurement element is arranged on the flat prism surface, so that the operation is simple and convenient, and the tight connection with the strain measurement element is ensured; the strain measurement system 3 is used for measuring the disturbance stress of the measurement point where the disturbance stress test sensor is located.
Further, the sensor filling body 4 is wrapped on the periphery of the strain measurement module 1; according to the invention, the strain measurement system 3 is integrated on the outer wall of the strain measurement module 1 (namely on the octahedral prism surface 1.2), the disturbance stress is measured through the octahedral prism surface 1.2, and the strain measurement module 1 and the strain measurement system 3 are wrapped inside the sensor filling body 4 as a whole, so that the size is reduced, the strain measurement module 1 and the strain measurement system 3 are effectively protected, and the measurement precision is ensured;
an octahedral top square plane 1.3 is arranged on the outer wall of the strain measurement module main body 1.1; a plurality of octahedral facets 1.2 are connected through an octahedral top square plane 1.3;
the sensor filling body 4 is a regular hexahedron, and the sensor filling body 4 in the regular hexahedron shape is used as a stress unit, so that the ground stress back calculation is convenient to carry out; the outer wall of the sensor filling body 4 is provided with a hexahedral plane 4.1;
the octahedral top square plane 1.3 is parallel to the hexahedral plane 4.1 (see fig. 4).
In order to weaken the local stress concentration in the test process, ensure the stress uniformity of the sensor and improve the accuracy of a disturbance stress test result, a square plane 1.3 at the top of each octahedron and a corresponding hexahedron plane 4.1 are arranged in parallel, and the method specifically comprises the following steps:
the octahedral top square plane 1.3 includes a first square plane 1.3A, a second square plane 1.3B, a third square plane 1.3C, a fourth square plane 1.3D, a fifth square plane and a sixth square plane;
the six faces of the hexahedral plane 4.1 are respectively: a first plane 4.1A, a second plane 4.1B, a third plane 4.1C, a fourth plane 4.1D, a fifth plane and a sixth plane;
the first square plane 1.3A is positioned inside the first plane 4.1A and is parallel to the first plane 4.1A; the second square plane 1.3B is located inside the second plane 4.1B and is parallel to the second plane 4.1B; the third square plane 1.3C is located inside the third plane 4.1C and is parallel to the third plane 4.1C; the fourth square plane 1.3D is located inside the fourth plane 4.1D and is parallel to the fourth plane 4.1D; the fifth square plane is positioned on the inner side of the fifth plane and is parallel to the fifth plane; the sixth square plane is located inside the sixth plane and parallel to the sixth plane (as shown in fig. 4).
Furthermore, a filling body edge 4.3 is arranged on the sensor filling body 4;
a fillet structure 4.2 (shown in figure 4) is arranged on the filler edge 4.3, so that local stress concentration in the test process is weakened, and the stress uniformity of the sensor is ensured.
The prior patent application CN201810599551.2, named as "disturbance stress measurement unit body method and device", is a patent application applied by the applicant of the present application on 2018, 06, month and 11, and the applicant finds in subsequent studies that, in the process of preparation and use, the conventional processing method cannot accurately prepare the pore channel therein, and there is a high processing precision requirement in terms of pore channel angle, flatness, thread and plug manufacturing, so that it is difficult to popularize the method, and a better effect may be achieved by using 3D printing, but the types of preparation materials are also limited, and in addition, the spatial distribution of the pore channel inside the device is complex, which causes difficult installation and easy damage of strain measurement elements (such as strain gauge, fiber bragg grating, and the like). The present patent application aims to solve the problems of the unit body method and apparatus for measuring disturbance stress of patent application CN201810599551.2, which has the patent name of "difficult preparation" and difficult installation of strain measurement elements (such as strain gauge, fiber grating, etc.).
Examples
The invention will be described in detail by taking the embodiment of the invention as an example for manufacturing a disturbance stress sensor, and the invention also has a guiding function for manufacturing other disturbance stress sensors.
As shown in fig. 1, 2, 3, and 4, in this embodiment, a method for manufacturing a perturbation stress sensor includes the following steps,
the method comprises the following steps: determining materials according to geological conditions (determining main geological condition parameters of the materials comprises rigidity, strength, molding conditions and the like);
step two: manufacturing a mould; manufacturing a corresponding die to ensure the rapid molding of the special-shaped octahedron and smooth surface; in this embodiment, a mold is manufactured by machining (metal) (the manufacturing method is the prior art), and the cross section of the mold is shown in fig. 3;
step three: before pouring, lubricating oil is brushed or a preservative film is paved on the die, so that smooth demolding and smooth surface after pouring are ensured;
step four: preparing a strain measurement module;
pouring the pouring material in the step one on the die in the step four, manufacturing a strain measurement module 1 and polishing; pouring is completed, maintenance is carried out for a set time under proper conditions, after the strain measuring module 1 reaches a certain hardness, the mold bolt is opened, the octahedron is taken out, twelve edges are polished by finest abrasive paper, the surface is ensured to be smooth and flat, and after polishing is completed, the octahedron is wiped clean by alcohol;
step five: pasting a strain gauge on the strain measurement module 1, performing silica gel protection, and fixing a protection data line;
bonding strain gauges on twelve octahedral edges 1.2 of the strain measurement module 1; the data lines and the optical fibers of the carding strain gauges are gathered into a bundle and fixed on the surface of the strain measurement module 1, and then the strain gauges, the data lines and the optical fibers are protected by sealing glue;
step six: preparing a sensor filling body;
pouring the pouring material in the first step on the periphery of the strain measurement module 1 to form a regular hexahedral sensor filling body 4, and completing preparation of the disturbance stress sensor 5;
suspending and fixing the special-shaped octahedron on a support by adopting a thin line, pouring a regular hexahedron (namely the sensor filling body 4 of the regular hexahedron) on the periphery of the strain measuring module 1 by adopting the pouring material in the step one, and ensuring that the special-shaped octahedron (namely the strain measuring module 1) is positioned at the central position of the regular hexahedron (namely the sensor filling body 4 of the regular hexahedron) and six top square planes of the special-shaped octahedron are parallel to six surfaces of the regular hexahedron, as shown in fig. 4; after the pouring is finished, maintenance is carried out according to the regulations, after the regular hexahedron (namely the sensor filling body 4 of the regular hexahedron) reaches certain hardness, chamfering and polishing are carried out on twelve filling body edges 4.3 of the sensor filling body 4 of the regular hexahedron, so that the local stress concentration in the testing process is weakened, and the stress uniformity of the sensor is ensured.
After all the steps are completed, the testing system of the disturbance stress sensor is inspected and calibrated, and after the accuracy and precision are qualified, the testing system is installed and used on site according to a site testing method provided in patent application CN201810599551.2 with the patent name of Unit body method and device for disturbance stress measurement.
And (4) conclusion: the strain measurement device is small in size, simple in structure, convenient to manufacture, low in cost and accurate in disturbance stress test result, and is convenient for mounting a strain measurement element.
In order to more clearly illustrate the advantages of the method for manufacturing a disturbance stress sensor according to the present invention compared with the prior art, the two technical solutions are compared by the staff, and the comparison results are as follows:
as can be seen from the above table, compared with the prior art, the method for manufacturing the disturbance stress sensor of the invention has the advantages of simpler manufacturing of the sensor, more universal manufacturing materials, high accuracy of the detection result of the disturbance stress, suitability for various disturbance stress test environments, and simple and convenient installation mode of the strain measurement element.
Other parts not described belong to the prior art.
Claims (8)
1. The manufacturing method of the disturbance stress sensor is characterized by comprising the following steps: comprises the following steps of (a) carrying out,
the method comprises the following steps: determining a pouring material;
step two: manufacturing a mould;
step three: brushing lubricating oil or laying a preservative film on the mould;
step four: preparing a strain measurement module;
pouring the pouring material in the step one on the die in the step four, manufacturing a strain measurement module (1) and polishing;
step five: a strain measuring element is arranged on the strain measuring module (1) to fixedly protect the data line;
step six: preparing a sensor filling body;
pouring the pouring material in the first step on the periphery of the strain measurement module (1) to form a regular hexahedral sensor filling body (4), and completing preparation of the disturbance stress sensor (5);
connecting the disturbance stress sensor (5) with a strain test system, and checking the disturbance stress sensor (5);
step seven: and (5) field installation and use.
2. The method of fabricating a perturbed stress sensor according to claim 1, characterized in that: in the second step, the die (6) is split up and down; an inner cavity (6.4) is arranged in the die (6); the inner cavity (6.4) is a special-shaped octahedron;
the die (6) comprises an upper die plate (6.1) and a lower die plate (6.2); a pouring opening (6.3) is reserved in the upper plate (6.1) of the die; the upper die plate (6.1) and the lower die plate (6.2) are fixedly connected through bolts.
3. The method of manufacturing a perturbed stress sensor according to claim 2, characterized in that: in the fourth step, the strain measurement module (1) is shaped like a special octahedron.
4. The method of manufacturing a perturbed stress sensor according to claim 3, characterized in that: in the sixth step, the strain measurement module (1) is suspended and fixed on a support by adopting a thin wire, and the sensor filling body (4) is poured on the periphery of the strain measurement module (1) by adopting the pouring material in the first step;
after the pouring is finished, the strain measurement module (1) is located in the center of the sensor filling body (4), and the square on the top of the strain measurement module (1) is parallel to the outer side face of the sensor filling body (4).
5. The method of manufacturing a perturbed stress sensor according to claim 4, characterized in that: in the sixth step, the disturbance stress sensor (5) comprises a strain measurement module (1), a strain measurement system (3) and a sensor filling body (4);
the strain measurement system (3) is arranged on the outer wall of the strain measurement module (1);
the sensor filling body (4) is arranged on the periphery of the strain measurement module (1) and is positioned outside the strain measurement system (3).
6. The method of manufacturing a perturbed stress sensor according to claim 5, characterized in that: an octahedral prism surface (1.2) is arranged on the outer wall of the strain measurement module (1);
the strain measurement system (3) is arranged on the octahedral prism surface (1.2).
7. The method of manufacturing a perturbed stress sensor according to claim 6, characterized in that: the sensor filling body (4) is wrapped on the periphery of the strain measurement module (1);
an octahedral top square plane (1.3) is arranged on the outer wall of the strain measurement module (1); a plurality of octahedral facets (1.2) are connected through an octahedral top square plane (1.3);
the outer wall of the sensor filling body (4) is provided with a hexahedral plane (4.1);
the square plane (1.3) at the top of the octahedron and the hexahedron plane (4.1) are arranged in parallel.
8. The method of manufacturing a perturbed stress sensor according to claim 7, characterized in that: a filling body edge (4.3) is arranged on the sensor filling body (4);
and a fillet structure (4.2) is arranged on the edge (4.3) of the filling body.
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| CN102175366A (en) * | 2011-03-05 | 2011-09-07 | 河南理工大学 | Fiber bragg grating (FBG) testing device and testing method for rock three-dimensional stress state |
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Effective date of registration: 20221129 Address after: No.1, shijichengzhong Road, Guandu District, Kunming City, Yunnan Province Applicant after: HUANENG LANCANG RIVER HYDROPOWER Inc. Applicant after: INSTITUTE OF ROCK AND SOIL MECHANICS, CHINESE ACADEMY OF SCIENCES Applicant after: POWERCHINA ZHONGNAN ENGINEERING Corp.,Ltd. Applicant after: HUANENG GROUP TECHNOLOGY INNOVATION CENTER Co.,Ltd. Address before: No.1, shijichengzhong Road, Guandu District, Kunming City, Yunnan Province Applicant before: HUANENG LANCANG RIVER HYDROPOWER Inc. Applicant before: INSTITUTE OF ROCK AND SOIL MECHANICS, CHINESE ACADEMY OF SCIENCES Applicant before: POWERCHINA ZHONGNAN ENGINEERING Corp.,Ltd. |