CN115950738A - Ice mechanical property testing method and device based on pressing-in technology - Google Patents
Ice mechanical property testing method and device based on pressing-in technology Download PDFInfo
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- CN115950738A CN115950738A CN202211661456.3A CN202211661456A CN115950738A CN 115950738 A CN115950738 A CN 115950738A CN 202211661456 A CN202211661456 A CN 202211661456A CN 115950738 A CN115950738 A CN 115950738A
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Abstract
The invention discloses an ice mechanical property testing device based on a press-in technology, which comprises a transparent operating box, a hardness detection mechanism and a displacement detection mechanism, wherein the hardness detection mechanism and the displacement detection mechanism are arranged in the transparent operating box; the heat preservation and insulation mechanism is used for placing ice samples and is arranged below the hardness detection mechanism, and the heat preservation and insulation mechanism is communicated with the detection end of the hardness detection mechanism; and the data processing terminal is respectively in communication connection with the hardness detection mechanism and the displacement detection mechanism. The invention realizes the mechanical property parameter test of ice samples in different shapes under different environments, and has the advantages of high precision, strong applicability and convenient carrying.
Description
Technical Field
The invention relates to an ice mechanical property test, in particular to an ice mechanical property test method and device based on a pressing-in technology.
Background
The phenomenon of surface icing exists in various fields, and icing has great influence on the aspects of aerospace, road transportation, high-voltage power transmission lines and the like. Therefore, tests for ice mechanical property testing are receiving more and more extensive attention.
The existing ice mechanical property test is based on ice in different states and specific tests are carried out under different application scenes, and the experimental result cannot meet the requirements under multiple scenes. The compression-tension test is a conventional mechanical property test, and is used for measuring the strength of a solid material by applying loads with different magnitudes to observe the damage characteristics of a measured object. When the ice sample is measured by adopting the method, the influence of the environmental temperature is large, and the special test ice sample cannot be made into a standard sample. The related bending test and the ice mechanical property test method of the ultrasonic detection test have certain requirements on ice sample testing, cannot meet the measurement under multiple scenes, and cannot provide the mechanical property parameters of ice under special conditions. If the surface of the aircraft is iced, related ice mechanical property parameters cannot be obtained by using a conventional testing method, and basic theoretical data cannot be provided for subsequent deicing and anti-icing.
Therefore, how to realize the mechanical property parameter test of ice samples in different shapes under different environments is a problem to be solved urgently by the technical staff.
Disclosure of Invention
An object of the present invention is to solve at least the above problems and/or disadvantages and to provide at least the advantages described hereinafter.
To achieve these objects and other advantages and in accordance with the purpose of the invention, a method for testing mechanical properties of ice based on a press-in technique is provided, comprising the steps of:
step one, starting a refrigeration platform;
introducing liquid nitrogen into the annular cavity of the heat-insulating cover to reduce the temperature difference between the external temperature and the internal temperature of the heat-insulating cover;
placing the ice sample at the central position of the refrigeration platform;
fourthly, starting the communication connection of the laser displacement sensor, the pressure sensor, the high-speed camera, the lifting displacement platform and the data processing terminal, and regulating and controlling the lifting displacement platform to enable the pressure head to vertically abut against the middle position of the top end of the ice sample;
step five, setting the running speed per hour of the lifting displacement platform to enable a pressure head to press down on the ice sample, recording the maximum displacement value of the laser displacement sensor and the maximum pressure value of the pressure sensor when the set pressing depth is reached, then regulating and controlling the lifting platform to start to move upwards to finish the pressure unloading process, and exporting a curve graph of pressure data and displacement data through the data processing terminal;
step six, substituting the maximum displacement value and the tip angle of the pressure head into a press-in depth calculation formula, and calculating to obtain a press-in contact area;
step seven, obtaining a curve slope through a curve graph of the pressure data and the displacement data, substituting the curve slope and the pressing contact area into an Oliver-Pharr calculation model, and calculating to obtain a pressing reduced modulus;
step eight, converting the elastic modulus of the ice sample by pressing in the reduced modulus and the elastic modulus of the pressure head; and calculating the hardness of the ice sample according to the maximum pressure value and the press-in contact area.
Preferably, the calculation formula of the press-in contact area is:
wherein Ac is the press-in contact area, h is the maximum displacement value measured by the displacement sensor, and alpha is the tip angle of the pressure head;
the calculation formula of the indentation folding modulus is as follows:
wherein Er is indentation folding modulus, S is curve slope, and Ac is indentation contact area.
Preferably, wherein the elastic modulus conversion formula is:
wherein Er is an indentation folding modulus, ei is an elastic modulus of a pressure head, E is an elastic modulus of an ice sample, v is a Poisson ratio of the ice sample, and vi is the Poisson ratio of the pressure head;
the hardness of the ice sample is calculated by the formula:
wherein H is the hardness of the ice sample, P is the maximum pressure value measured by the pressure sensor, and Ac is the indentation contact area.
An ice mechanical property testing device based on a press-in technology comprises a transparent operating box and a hardness detection mechanism arranged in the transparent operating box;
a displacement detection mechanism provided on the hardness detection mechanism;
the heat preservation and insulation mechanism is used for placing ice samples and arranged below the hardness detection mechanism, and the heat preservation and insulation mechanism is communicated with the detection end of the hardness detection mechanism;
and the data processing terminal is respectively in communication connection with the hardness detection mechanism and the displacement detection mechanism.
Preferably, the device also comprises a high-speed camera for shooting the contact change of the ice sample in the experimental process, the high-speed camera is erected in the transparent operation box, and the high-speed camera is in communication connection with the data processing terminal.
Preferably, wherein the hardness detecting mechanism includes:
the supporting frame is arranged in the transparent operation box;
the lifting displacement platform is vertically and fixedly connected to the support frame and is in communication connection with the data processing terminal;
the top end of the pressure sensor is connected with the lifting displacement platform through a switching connecting block, and the pressure sensor is in communication connection with the data processing terminal;
the middle position of the top end of the heat insulation seat is fixedly connected with the bottom end of the pressure sensor;
and the pressure head is detachably connected to the middle position of the bottom end of the heat insulation seat.
Preferably, wherein, the mode that the pressure head with thermal-insulated seat detachable connection is:
the bottom intermediate position fixedly connected with connecting cylinder of thermal-insulated seat, the tip cover of pressure head is established in the connecting cylinder, just the threaded connection who goes back the symmetry on the connecting cylinder has a plurality of bolts, and each the end of bolt twist through the screw thread all with the tip of pressure head supports and leans on.
Preferably, wherein the displacement detecting mechanism includes:
the laser displacement sensor is vertically fixed on the support frame and is in communication connection with the data processing terminal;
the sheet is fixedly connected with the heat insulation seat, and the sheet is arranged corresponding to the transmitting end of the laser displacement sensor.
Preferably, the heat insulating mechanism includes:
the heat insulation base is arranged in the transparent operation box and is positioned below the hardness detection mechanism;
the heat preservation cover is placed on the heat insulation base, the top end middle position of the heat preservation cover is provided with a detection hole in a penetrating mode, the detection end of the hardness detection mechanism is sleeved in the detection hole through a lifting sleeve, and the heat preservation cover is provided with an annular cavity used for being filled with liquid nitrogen to isolate heat along the peripheral wall.
Preferably, the ice-making device further comprises a refrigeration platform for refrigerating the ice sample, the refrigeration platform is arranged on the heat insulation base, and the refrigeration platform is located in the heat preservation cover.
The invention at least comprises the following beneficial effects:
firstly, the invention realizes the mechanical property parameter test of ice samples in different shapes under different environments, and has the advantages of high precision, strong applicability and convenient carrying; the method does not need to use large and expensive experimental equipment, and has good use value and economic applicability.
Secondly, in the invention, a complex operation flow is not needed in the experiment process, experimenters can rapidly operate, and the time for completing a group of experiments can be controlled within 5 to 10 minutes; the temperature control of the heat preservation device can be realized, the experimental requirements under different temperatures can be met,
Thirdly, the invention has smaller influence range on the surface of the sample in the experimental process, can realize multiple experiments of the same sample to improve the accuracy of the experimental result and has higher repeatability of the experimental result.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic structural view of the heat-insulating cover of the present invention.
Figure 3 is a schematic view of the connector barrel connection of the present invention.
Fig. 4 is a graph in an embodiment of the invention.
Detailed Description
The present invention is described in further detail below with reference to the attached drawings so that those skilled in the art can implement the invention by referring to the description text.
It will be understood that terms such as "having," "including," and "comprising," as used herein, do not preclude the presence or addition of one or more other elements or groups thereof.
It is to be understood that in the description of the present invention, the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are used only for convenience in describing the present invention and for simplification of the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, unless otherwise specifically stated or limited, the terms "mounted," "disposed," "sleeved/connected," "connected," and the like are used broadly, and for example, "connected" may be a fixed connection, a detachable connection, or an integral connection, a mechanical connection, an electrical connection, a direct connection, an indirect connection via an intermediate medium, or a communication between two elements, and those skilled in the art will understand the specific meaning of the terms in the present invention specifically.
Further, in the present invention, unless otherwise explicitly specified or limited, a first feature "on" or "under" a second feature may be directly contacted with the first and second features, or indirectly contacted with the first and second features through an intermediate. Also, a first feature "on," "above," and "over" a second feature may be directly on or obliquely above the second feature, or simply mean that the first feature is at a higher level than the second feature. A first feature "under," "beneath," and "under" a second feature may be directly under or obliquely under the second feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
Fig. 1 shows an implementation form of the present invention, which includes a transparent operation box 1, and a hardness detection mechanism 2 disposed in the transparent operation box 1;
a displacement detection mechanism 3 provided on the hardness detection mechanism 2;
the heat preservation and insulation mechanism 4 is used for placing the ice sample 6 and is arranged below the hardness detection mechanism 2, and the heat preservation and insulation mechanism 4 is communicated with the detection end of the hardness detection mechanism 2;
and the data processing terminal 5 is respectively in communication connection with the hardness detection mechanism 2 and the displacement detection mechanism 3.
The working principle is as follows: when the ice mechanical detection is carried out on the ice sample 6, the ice sample 6 is placed in the heat preservation and insulation mechanism 4, the temperature difference between the inside and the outside is reduced through the heat preservation and insulation mechanism 4, the ice sample 6 is prevented from melting to generate the change of mechanical property, then the detection end of the hardness detection mechanism 2 is adjusted into the heat preservation and insulation mechanism 4, the detection end of the hardness detection mechanism 2 is abutted against the middle position of the top end of the ice sample 6, then the hardness detection mechanism 2 is started to press down the ice sample 6, the displacement detection mechanism 3 detects the displacement of the hardness detection mechanism 2, when the hardness detection mechanism 2 is pressed down to a specified depth, the hardness detection mechanism 2 is regulated and controlled to start moving upwards, the pressure unloading process is completed, the data processing terminal 5 collects the pressure data of the hardness detection mechanism 2 and the displacement data of the displacement detection mechanism 3 in real time, a curve graph of the pressure data and the displacement data is derived through the data processing terminal 5, and a curve graph of the pressure data and the displacement data is calculated through the detection end angle of the hardness detection mechanism 2 and the maximum displacement value of the displacement detection mechanism 3, and the contact area is obtained through calculation; obtaining a curve slope through a curve graph, bringing the curve slope and an indentation contact area into an Oliver-Pharr calculation model to obtain an indentation reduced modulus, pressing the reduced modulus and inherent physical parameters of a detection end of a hardness detection mechanism 2 to obtain an elastic modulus of an ice sample 6, and obtaining the hardness of the ice sample 6 through a maximum pressure value and an indentation contact area of the hardness detection mechanism 2; in the technical scheme, the mechanical property parameter test of ice samples in different shapes in different environments is realized, and the ice sample tester has the beneficial effects of high accuracy, strong applicability and convenience in carrying.
In the scheme, the device further comprises a high-speed camera 7 for shooting the contact change of the ice sample 6 in the experimental process, the high-speed camera 7 is erected in the transparent operation box 1, and the high-speed camera 6 is in communication connection with the data processing terminal 5. Through the high-speed camera 7, the process of the contact change of the ice sample 6 in the experimental process is clearly recorded, so that the operation of an operator is facilitated, the experimental process and the later period are conveniently finished, and the method has the advantages of being convenient for analyzing and summarizing and improving the experimental precision.
As described above, the hardness detection mechanism 2 includes:
a support frame 21 disposed in the transparent operation box;
the lifting displacement platform 22 is vertically and fixedly connected to the support frame 21, and the lifting displacement platform 22 is in communication connection with the data processing terminal 5;
the top end of the pressure sensor 23 is connected with the lifting displacement platform 22 through a switching connecting block 24, and the pressure sensor 23 is in communication connection with the data processing terminal 5;
a heat insulation seat 25, the middle position of the top end of which is fixedly connected with the bottom end of the pressure sensor 23;
and the pressure head 26 is detachably connected to the middle position of the bottom end of the heat insulation seat 25.
The lifting displacement platform 22 comprises a screw guide rail 221 fixedly connected to the support frame 21, a servo motor 222 serving as a power source is connected to the top end of the screw guide rail 221, the servo motor 222 is in communication connection with the data processing terminal 5, and a movable sliding block 223 of the screw guide rail 221 is connected with the top end of the pressure sensor 23 through a transfer connecting block 24.
The working principle is as follows: the data processing terminal 5 controls the servo motor 222 to rotate clockwise or anticlockwise so as to drive the movable slider 223 of the lead screw guide rail 221 to ascend or descend, and the lifting displacement platform 22 can meet the displacement change of a press-in test by regulating and controlling the rotating speed of the servo motor 222, so that the range change of the loading speed of 0.005-1 mm/s is realized; when the ice mechanics detection is carried out on the ice sample 6, the lifting displacement platform 22 is regulated and controlled to drive the pressure head 26 to enter the heat preservation and heat insulation mechanism 4, the pressure head 26 abuts against the top end middle position of the ice sample 6, then the loading speed of the lifting displacement platform 22 is adjusted, the lifting displacement platform 22 is started to press down the ice sample 6 through the pressure head 26, when the pressure head is pressed down to a specified depth, the lifting displacement platform 22 starts to move upwards at the same loading speed, the pressure unloading process is completed, the pressure sensor 23 transmits the detected pressure data to the data processing terminal 5 in real time for collection and arrangement, the heat exchange between the pressure sensor 23 and the pressure head 26 is isolated through the heat insulation seat 25, the pressure sensor 23 is effectively prevented from being damaged, and a large temperature difference is prevented from being generated between the pressure head 26 and the ice sample 6, and the advantages of improving the experiment precision, guaranteeing the structural stability and facilitating regulation and control are achieved.
In the above scheme, the detachable connection between the pressure head 26 and the heat insulation seat 25 is as follows:
the bottom middle position fixedly connected with connecting cylinder 27 of thermal-insulated seat 25, the tip cover of pressure head 26 is established in connecting cylinder 27, just the threaded connection who still symmetry on the connecting cylinder 27 has a plurality of bolts 28, and each bolt 28's end twist through the screw thread all with the tip of pressure head 26 supports and leans on.
The working principle is as follows: through the connecting cylinder 27 of the bottom intermediate position fixed connection of thermal-insulated seat 25, establish the connecting cylinder 27 back with the tip cover of pressure head 26, rethread multiple bolt 28 is fixed pressure head 26, prevents that pressure head 26 from breaking away from connecting cylinder 27 to be convenient for switch the pressure head 26 of different plans, in order to satisfy different experimental demands, have reinforcing suitability, be convenient for connect the favourable of dismantling.
As in the above-described embodiment, the displacement detecting mechanism 3 includes:
the laser displacement sensor 31 is vertically fixed on the support frame 21, and the laser displacement sensor 31 is in communication connection with the data processing terminal 5;
and the sheet 32 is fixedly connected with the heat insulation seat 25, and the sheet 32 is arranged corresponding to the emission end of the laser displacement sensor 31.
The working principle is as follows: the transmitting terminal through thin slice 32 and laser displacement sensor 31 corresponds the setting for the laser beam shines perpendicularly on thin slice 32, in the experimentation, when lift displacement platform 22 goes up and down, thermal-insulated seat 25 drives thin slice 32 and goes up and down, thereby realize that laser displacement sensor 31 goes up and down the detection of displacement volume, the displacement data that laser displacement sensor 31 detected, real-time transmission gathers the arrangement to data processing terminal 5, have the guarantee and detect the precision, the advantage of guarantee connection stability.
In the above solution, the heat preservation and insulation mechanism 4 includes:
a heat insulating base 41 provided in the transparent operation box 1 and located below the hardness detection mechanism 2;
the heat preservation cover 42 is placed on the heat insulation base 41, the top end middle position of the heat preservation cover 42 is further provided with a detection hole 45 in a penetrating mode, the detection end of the hardness detection mechanism 2 is sleeved in the detection hole 45 through a lifting sleeve, and the heat preservation cover 42 is provided with an annular cavity 43 used for being filled with liquid nitrogen to isolate heat along the peripheral wall.
The working principle is as follows: when carrying out the ice mechanics to ice appearance 6 and examining time measuring, through let in the liquid nitrogen in annular chamber 43, reduce the inside and outside temperature difference of heat preservation cover 42, adjust the liquid nitrogen volume that lets in the annular chamber 43 in order to reach the temperature range that the experiment needs, thereby slow down the inside ice appearance 6 of heat preservation cover 42 and melt, and prevent through thermal-insulated base 41 that outside temperature from entering into by heat preservation cover 42 bottom and influence the inside temperature of heat preservation cover 42, be convenient for hardness detection mechanism 2's sense terminal through inspection hole 45 and get into in heat preservation cover 42, carry out the ice mechanics test to ice appearance 6, adopt this kind of mode to have the guarantee experimental effect, the favourable part of guarantee experiment accuracy.
In the above solution, the ice sample cooling device further includes a cooling platform 44 for cooling the ice sample 6, which is disposed on the heat insulation base 41, and the cooling platform 44 is located in the heat insulation cover 42. The purpose of regulating and controlling the internal temperature of the heat-insulating cover 42 is achieved through the refrigeration platform 44, physical property changes caused by melting of the ice sample 6 in the experiment process can be effectively prevented through the cooperation of the heat-insulating cover 42, the heat-insulating base 41 and the refrigeration platform 44, and the method has the advantages of ensuring accuracy and enhancing applicability.
Example (b):
a method for testing ice mechanical properties based on a press-in technology comprises the following steps:
step one, starting a refrigeration platform 44, wherein the temperature of the refrigeration platform 44 is set to be-15 ℃;
step two, introducing 15ml of liquid nitrogen into the annular chamber 43 of the heat-insulating cover 42, and reducing the temperature of the annular chamber 43 to about minus 10 ℃ after 2-3 seconds, wherein the temperature inside the heat-insulating cover 42 is minus 15 ℃, and the temperature difference between the outside temperature and the temperature inside the heat-insulating cover 42 is reduced;
step three, placing the ice sample 6 at the central position of the refrigeration platform 44;
fourthly, starting the communication connection of the laser displacement sensor 31, the pressure sensor 23, the high-speed camera 7, the lifting displacement platform 22 and the data processing terminal 5, and regulating and controlling the lifting displacement platform 22 to enable the pressure head 26 to vertically abut against the middle position of the top end of the ice sample 6;
step five, setting the running speed of the lifting displacement platform 22 to be 3 μm/s, enabling the pressure head 26 to press down on the ice sample 6, recording the maximum displacement value of the laser displacement sensor 31 to be 100 μm and the maximum pressure value of the pressure sensor 23 to be 2.18N when the set pressing depth reaches 100 μm, then regulating and controlling the lifting platform 22 to start moving upwards, completing the pressure unloading process, and exporting a pressure data and displacement data curve graph (shown in figure 4) through the data processing terminal 5;
step six, bringing the maximum displacement value and the tip angle of the pressure head into
Wherein, the maximum displacement value h =100 μm measured by the laser displacement sensor 31, the tip angle α =60 ° of the indenter, and the indentation contact area Ac =0.01045mm is calculated 2 ；
Step seven, obtaining the slope S =298 of the curve through a graph of the pressure data and the displacement data, and enabling the slope S =298 of the curve and the pressed contact area Ac =0.01045mm 2 Substituting into Oliver-Pharr calculation model, and calculating by formula
Calculating to obtain an indentation folding modulus Er =2.58Gpa;
step eight, converting the elastic modulus of the ice sample 6 by pressing in the reduced modulus and the elastic modulus of the pressure head 26
Wherein the indentation reduced modulus Er =2.58Gpa, the elastic modulus Ei =1100Gpa of the indenter 26, the Poisson ratio v =0.35 of the ice sample 6, the Poisson ratio vi =0.07 of the indenter 26, and the elastic modulus E =2.264Gpa of the ice sample 6 is calculated; substituting the maximum pressure value and the press-in contact area into a formula->
Wherein the maximum pressure value P =2.18N measured by the pressure sensor 23 is pressed into contact withArea Ac =0.01045mm 2 The hardness H =0.208Gpa of the ice sample 6 was calculated. />
While embodiments of the invention have been described above, it is not limited to the applications set forth in the description and the embodiments, which are fully applicable in various fields of endeavor to which the invention pertains, and further modifications may readily be made by those skilled in the art, it being understood that the invention is not limited to the details shown and described herein without departing from the general concept defined by the appended claims and their equivalents.
Claims (10)
1. An ice mechanical property testing method based on a press-in technology is characterized by comprising the following steps:
step one, starting a refrigeration platform;
introducing liquid nitrogen into an annular cavity of the heat-insulating cover, and reducing the temperature difference between the external temperature and the temperature inside the heat-insulating cover;
placing the ice sample at the central position of the refrigeration platform;
step four, starting the communication connection of the laser displacement sensor, the pressure sensor, the high-speed camera, the lifting displacement platform and the data processing terminal, and regulating and controlling the lifting displacement platform to enable the pressure head to vertically abut against the middle position of the top end of the ice sample;
step five, setting the running speed per hour of the lifting displacement platform to enable a pressure head to press down on the ice sample, recording the maximum displacement value of the laser displacement sensor and the maximum pressure value of the pressure sensor when the set pressing depth is reached, then regulating and controlling the lifting platform to start to move upwards to finish the pressure unloading process, and exporting a curve graph of pressure data and displacement data through the data processing terminal;
step six, substituting the maximum displacement value and the tip angle of the pressure head into a press-in depth calculation formula, and calculating to obtain a press-in contact area;
step seven, obtaining a curve slope through a curve graph of the pressure data and the displacement data, substituting the curve slope and the pressing contact area into an Oliver-Pharr calculation model, and calculating to obtain a pressing reduced modulus;
step eight, converting the elastic modulus of the ice sample by pressing in the reduced modulus and the elastic modulus of the pressure head; and calculating the hardness of the ice sample according to the maximum pressure value and the press-in contact area.
2. An ice mechanical property testing method based on indentation technology as claimed in claim 1, characterized in that the calculation formula of indentation contact area is:
wherein Ac is the press-in contact area, h is the maximum displacement value measured by the displacement sensor, and alpha is the tip angle of the pressure head;
the calculation formula of the indentation folding modulus is as follows:
wherein E is r For indentation reduced modulus, S is the slope of the curve and Ac is the indentation contact area.
3. An ice mechanical property testing method based on pressing-in technology according to claim 1, characterized in that the elastic modulus conversion formula is:
wherein, E r To an indentation fold modulus, E i Is the modulus of elasticity of the indenter, E is the modulus of elasticity of the ice-like, v is the Poisson's ratio of the ice-like, v i Is the poisson ratio of the indenter;
the hardness of the ice sample is calculated according to the formula:
wherein H is the hardness of the ice sample, P is the maximum pressure value measured by the pressure sensor, and Ac is the indentation contact area.
4. The ice mechanical property testing device based on the pressing-in technology according to any one of claims 1 to 3, comprising a transparent operating box and a hardness detection mechanism arranged in the transparent operating box, wherein:
a displacement detection mechanism provided on the hardness detection mechanism;
the heat preservation and insulation mechanism is used for placing ice samples and is arranged below the hardness detection mechanism, and the heat preservation and insulation mechanism is communicated with the detection end of the hardness detection mechanism;
and the data processing terminal is respectively in communication connection with the hardness detection mechanism and the displacement detection mechanism.
5. An ice mechanical property testing device based on the pressing-in technology as claimed in claim 4, characterized by further comprising a high-speed camera for shooting the contact change of the ice sample in the experimental process, wherein the high-speed camera is erected in the transparent operation box and is in communication connection with the data processing terminal.
6. An ice mechanical property testing device based on press-in technology according to claim 4, wherein the hardness detecting mechanism comprises:
the supporting frame is arranged in the transparent operation box;
the lifting displacement platform is vertically and fixedly connected to the support frame and is in communication connection with the data processing terminal;
the top end of the pressure sensor is connected with the lifting displacement platform through a switching connecting block, and the pressure sensor is in communication connection with the data processing terminal;
the middle position of the top end of the heat insulation seat is fixedly connected with the bottom end of the pressure sensor;
and the pressure head is detachably connected to the middle position of the bottom end of the heat insulation seat.
7. An ice mechanical property testing device based on pressing-in technology as claimed in claim 6, wherein the manner of detachable connection of the pressure head and the heat insulation seat is as follows:
the bottom intermediate position fixedly connected with connecting cylinder of thermal-insulated seat, the tip cover of pressure head is established in the connecting cylinder, just the threaded connection who goes back the symmetry on the connecting cylinder has a plurality of bolts, and each the end of bolt twist through the screw thread all with the tip of pressure head supports and leans on.
8. An ice mechanical property testing device based on indentation technology as claimed in claim 6, wherein the displacement detecting mechanism comprises:
the laser displacement sensor is vertically fixed on the support frame and is in communication connection with the data processing terminal;
the sheet is fixedly connected with the heat insulation seat, and the sheet is arranged corresponding to the transmitting end of the laser displacement sensor.
9. An ice mechanical property testing device based on press-in technology as claimed in claim 4, wherein the heat preservation and insulation mechanism comprises:
the heat insulation base is arranged in the transparent operation box and is positioned below the hardness detection mechanism;
the heat preservation cover is placed on the heat insulation base, the top end middle position of the heat preservation cover is provided with a detection hole in a penetrating mode, the detection end of the hardness detection mechanism is sleeved in the detection hole through a lifting sleeve, and the heat preservation cover is provided with an annular cavity used for being filled with liquid nitrogen to isolate heat along the peripheral wall.
10. An ice mechanical property testing device based on the pressing-in technology as claimed in claim 9, further comprising a refrigeration platform for refrigerating an ice sample, wherein the refrigeration platform is arranged on the heat insulation base, and the refrigeration platform is located in the heat preservation cover.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117030430A (en) * | 2023-08-04 | 2023-11-10 | 青岛海洋地质研究所 | Hydrate nanometer indentation device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117030430A (en) * | 2023-08-04 | 2023-11-10 | 青岛海洋地质研究所 | Hydrate nanometer indentation device |
| CN117030430B (en) * | 2023-08-04 | 2024-02-06 | 青岛海洋地质研究所 | Hydrate nanometer indentation device |
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