CN114923948A - Detection device and measurement method thereof - Google Patents
Detection device and measurement method thereof Download PDFInfo
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- CN114923948A CN114923948A CN202210506533.1A CN202210506533A CN114923948A CN 114923948 A CN114923948 A CN 114923948A CN 202210506533 A CN202210506533 A CN 202210506533A CN 114923948 A CN114923948 A CN 114923948A
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- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/16—Investigating or analyzing materials by the use of thermal means by investigating thermal coefficient of expansion
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Abstract
The invention discloses a detection device and a measurement method of the detection device. The detection device comprises a base, a temperature control structure, a limiting structure and a measuring device. The base is provided with a mounting groove for accommodating a heat transfer medium, the mounting groove is provided with a mounting area for mounting the sample to be tested, and the temperature control structure is used for keeping the heat transfer medium at a target temperature; the limiting structure is used for fixing the sample to be detected in the installation area; the measuring device comprises a movable piece and a distance measuring component, wherein the movable piece is used for being driven when the sample to be measured expands, and the distance measuring component is used for measuring the displacement of the movable piece. Compared with the traditional detection device, the detection device provided by the invention has the advantages of simple structure, easiness and intuition in operation, lower manufacturing cost and suitability for popularization.
Description
Technical Field
The invention relates to the technical field of material detection, in particular to a detection device and a measurement method of the detection device.
Background
In the production of workpieces, materials used for the workpieces generally expand to a certain degree when heated, and different materials have different linear expansion coefficients and different expanded lengths. The linear expansion coefficient of the material will affect the choice of the material and the design of the workpiece to a certain extent, so that the linear expansion coefficient needs to be measured before different materials are used. However, the conventional linear expansion coefficient detection device has a complicated structure and high manufacturing cost, and it is difficult to arrange the detection device in a production unit such as a general factory.
Disclosure of Invention
The invention mainly aims to provide a detection device and a measurement method thereof, and aims to solve the problems of complex structure and high manufacturing cost of the traditional detection device.
In order to achieve the above object, the present invention provides a detection apparatus for detecting a linear expansion coefficient of a sample to be detected, the detection apparatus comprising:
the device comprises a base, a temperature sensor and a temperature sensor, wherein the base is provided with an installation groove with an upward opening, the installation groove is used for accommodating a heat transfer medium, an installation area for installing the sample to be measured is arranged in the installation groove, and the installation area is provided with a measurement side and the rest installation side;
the temperature control structure is arranged on the base and used for controlling the temperature of the temperature transfer medium to be kept at a target temperature;
the limiting structure is arranged on the mounting side and used for fixing the sample to be tested in the mounting area; and the number of the first and second groups,
the measuring device comprises a moving part and a distance measuring component, wherein the moving part and the distance measuring component are movably arranged on the measuring side, so that when the sample to be measured at the mounting area expands and extends out of the measuring side, the moving part is driven and generates displacement along the expansion direction, and the distance measuring component is used for measuring the displacement of the moving part.
Optionally, the measuring device includes a chute arranged in the mounting groove, the chute extends along the expansion direction, the moving part is provided with a sliding projection corresponding to the chute, and the sliding projection is in sliding fit with the chute.
Optionally, the measuring device further includes two mounting plates disposed outside the mounting region, the two mounting plates are respectively disposed on two opposite sides of the measuring side, each mounting plate extends along the expansion direction, and the two mounting plates are respectively and oppositely provided with the sliding grooves.
Optionally, the measuring device further includes an amplifying element, the amplifying element is respectively connected to the moving member and the distance measuring element, and the amplifying element is configured to amplify the displacement of the moving member by a fixed multiple.
Optionally, the amplifying assembly comprises:
the first rack extends along the expansion direction and is arranged on the movable piece; and the number of the first and second groups,
the transmission part comprises a rod-shaped main body, and a first gear and a second gear which are arranged at two ends of the rod-shaped main body, wherein the first gear is meshed with the first rack, and the perimeter of the second gear is larger than that of the first gear.
Optionally, the second gear is located the installation region is in one side in the inflation direction, and has and is close to the first side of installation region and keep away from the second side of installation region, the focus of second gear is relative first side is closer to the second side sets up, so when the sample that awaits measuring does not expand, the second gear is kept away from under the effect of gravity the direction of installation region is rotatory, and drives the moving part orientation is located in the installation region the sample that awaits measuring moves, in order to support tightly the sample that awaits measuring.
Optionally, the second gear is semi-circular, wherein:
a counterweight structure is arranged at the position of the second gear close to the second side edge; and/or the presence of a gas in the atmosphere,
the second gear is provided with a notch at a position close to the first side edge.
Optionally, the ranging assembly comprises:
the scale part is fixedly arranged on the base, and a plurality of scale strips are distributed on the scale part at intervals along the expansion direction; and (c) a second step of,
the indicating piece is installed on the scale piece in a sliding mode along the expansion direction, the indicating piece is provided with a second rack extending along the expansion direction and an indicating needle used for pointing to the scale strip, and the second rack is meshed with the second gear so that the indicating needle is driven to point to different scale strips when the movable piece moves.
The invention also provides a measuring method based on the detection device, which comprises the following steps:
obtaining the expansion magnification of a sample to be detected;
determining detection parameters according to the expansion magnification, wherein the detection parameters comprise the size of the sample to be detected and the target temperature of the temperature transfer medium;
controlling the temperature control structure to heat the temperature of the heat transfer medium and keep the temperature at the target temperature;
acquiring the displacement of the movable piece;
and acquiring the linear expansion coefficient of the sample to be detected according to the displacement and the size of the sample to be detected.
Optionally, the measuring device further includes an amplifying assembly, the amplifying assembly includes a first rack extending along the expansion direction and disposed on the movable member, and a transmission member, the transmission member includes a rod-shaped main body, and a first gear and a second gear disposed at two ends of the rod-shaped main body, the first gear is engaged with the first rack, and a circumference of the second gear is greater than a circumference of the first gear;
the detection parameter further comprises a perimeter ratio of the first gear and the second gear;
before the step of controlling the temperature control structure to heat and maintain the temperature of the temperature transfer medium at the target temperature, the method further comprises:
and selecting the specifications of the first gear and the second gear according to the perimeter ratio and assembling.
According to the technical scheme, the sample to be tested is arranged in the installation area in the installation groove, the temperature transmission medium is accommodated in the installation groove, and the temperature transmission medium can keep the sample to be tested at the required target temperature. In particular, the temperature control structure may maintain the heat transfer medium at a target temperature. The measuring device is through setting up the moving part with the sample butt that awaits measuring so make the moving part can with the sample synchronous motion that awaits measuring, and the range finding subassembly can measure the displacement volume of moving part, so record the expansion length of the sample that awaits measuring to calculate according to this the linear expansion coefficient of the sample that awaits measuring.
The limiting structure can fix the sample to be measured in the mounting area, so that the sample to be measured extends out towards the measuring side when the temperature rises, and the measuring device can accurately measure the expansion length of the sample to be measured. Compared with the traditional detection device, the detection device provided by the invention has the advantages of simple structure, easiness and intuition in operation, lower manufacturing cost and suitability for popularization.
Drawings
In order to more clearly illustrate the embodiments or technical solutions of the present invention, the drawings used in the embodiments or technical solutions of the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an embodiment of a detection apparatus provided in the present invention;
FIG. 2 is a schematic structural diagram of a part of the structure of the detection apparatus in FIG. 1;
FIG. 3 is a schematic structural view of a portion of the structure of FIG. 2;
fig. 4 is a schematic flowchart of a measurement method of a detection apparatus according to an embodiment of the present invention. The reference numbers illustrate:
| reference numerals | Name(s) | Reference numerals | Name (R) | |
| 100 | Detection device | 1 | |
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| 11 | |
2 | |
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| 3 | |
31 | |
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| 32 | |
33 | |
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| 34 | Amplifying |
341 | |
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| 342 | |
3421 | |
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| 3422 | |
3423 | Rod-shaped |
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| 35 | |
351 | |
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| | Scale bar | 352 | |
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| 3521 | |
3522 | Indicating |
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| 200 | Sample to be tested |
The implementation, functional features and advantages of the present invention will be further described with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive step based on the embodiments of the present invention, are within the scope of protection of the present invention.
It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.
In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" appearing throughout includes three juxtapositions, exemplified by "A and/or B" including either A or B or both A and B. In addition, technical solutions between the embodiments may be combined with each other, but must be based on the realization of the technical solutions by a person skilled in the art, and when the technical solutions are contradictory to each other or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
In the production of workpieces, materials used for the workpieces generally expand to a certain degree when heated, and different materials have different linear expansion coefficients and different expanded lengths. The linear expansion coefficient of a material may affect the selection of the material and the design of a workpiece to a certain extent, so that the linear expansion coefficient needs to be measured before different materials are used. However, the conventional linear expansion coefficient detection device has a complicated structure and high manufacturing cost, and it is difficult to arrange the detection device in a production unit such as a general factory.
In view of this, the present invention provides a detection apparatus for detecting the linear expansion coefficient of a sample to be detected. Fig. 1 to 3 illustrate an embodiment of a detection apparatus provided in the present invention.
Referring to fig. 1 to 2, the present invention provides a detection apparatus 100 for detecting a linear expansion coefficient of a sample 200 to be detected, the detection apparatus 100 comprising: base 1, control by temperature change structure, limit structure 2, measuring device 3. The base 1 is provided with an installation groove 11 with an upward opening, the installation groove 11 is used for accommodating a heat transfer medium, an installation area for installing the sample 200 to be tested is arranged in the installation groove 11, and the installation area is provided with a measurement side and the rest installation sides; the temperature control structure is arranged on the base 1 and is used for controlling the temperature of the heat transfer medium to be kept at a target temperature; the limiting structure 2 is mounted on the mounting side, and the limiting structure 2 is used for fixing the sample 200 to be tested in the mounting area; the measuring device 3 includes a movable element 31 movably disposed on the measuring side and a distance measuring element 35, so that when the sample 200 to be measured at the mounting region expands and extends out from the measuring side, the movable element 31 is driven and generates displacement along the expansion direction, and the distance measuring element 35 is used for measuring the displacement of the movable element 31.
In the present invention, the expansion directions are opposite directions, and the expansion direction represents only the direction in which the sample 200 to be measured expands, and is not particularly limited.
In the technical scheme of the invention, the sample 200 to be tested is arranged in the installation area in the installation groove 11, and the temperature transmission medium is accommodated in the installation groove 11 and can keep the sample 200 to be tested at the required target temperature. In particular, the temperature control structure may maintain the heat transfer medium at a target temperature. The measuring device 3 is provided with the movable element 31 and the sample 200 to be measured, so that the movable element 31 can move synchronously with the sample 200 to be measured, the distance measuring component 35 can measure the displacement of the movable element 31, the expansion length of the sample 200 to be measured is measured, and the linear expansion coefficient of the sample 200 to be measured is calculated accordingly.
The limiting structure 2 can fix the sample 200 to be measured in the installation area, so that the sample 200 to be measured extends out towards the measurement side when the temperature rises, and the measurement device 3 can accurately measure the expansion length of the sample 200 to be measured. Compared with the traditional detection device 100, the detection device 100 provided by the invention has the advantages of simple structure, easiness and intuition in operation, lower manufacturing cost and suitability for popularization.
It should be noted that there are various choices of the temperature transfer medium, the temperature transfer medium may be common water or various chemical solutions, and the specific choice may be adjusted according to the required target temperature, and is not limited herein.
Specifically, referring to fig. 1 and fig. 2, the measuring device 3 includes a sliding groove 32 disposed in the mounting groove 11, the sliding groove 32 extends along the expansion direction, and the movable element 31 is provided with a sliding protrusion corresponding to the sliding groove 32, and the sliding protrusion is in sliding fit with the sliding groove 32.
The movable member 31 is movably mounted in the mounting groove 11, and the specific mounting manner is various, and in this embodiment, the sliding groove 32 is movably matched with the sliding protrusion. Specifically, the sliding groove 32 is disposed on a wall surface of the mounting groove 11, and the movable element 31 is slidably engaged with the sliding groove 32 through the sliding protrusion, so as to move along an extending direction of the sliding groove 32. The number and the position of the sliding grooves 32 are not particularly limited, as long as the sliding grooves 32 extend in the expansion direction, and the specific number and the position can be adjusted according to specific situations.
Specifically, referring to fig. 1, the measuring apparatus 3 further includes two mounting plates 33 disposed outside the mounting region, the two mounting plates 33 are respectively disposed on two opposite sides of the measuring side, each mounting plate 33 extends along the expansion direction, and the two mounting plates 33 are respectively and oppositely disposed with the sliding grooves 32.
In the present embodiment, the two mounting plates 33 are respectively disposed on opposite sides of the measurement side, and the sliding grooves 32 are disposed on the mounting plates 33, which makes the movable member 31 more freely mounted. The two mounting plates 33 are arranged at intervals, a movable channel is formed at the interval between the two mounting plates 33, and the movable piece 31 is also arranged in the movable channel. It should be noted that the two mounting plates 33 are respectively disposed on two opposite sides of the measuring side, so that the expansion portion of the sample 200 to be measured extends into the movable channel when the sample is heated and thermally expanded each time, thereby pushing the movable member 31 to move, and facilitating the measurement by the distance measuring assembly 35.
Further, referring to fig. 1 to 3, the measuring apparatus 3 further includes an amplifying element 34, the amplifying element 34 is respectively connected to the movable element 31 and the distance measuring element 35, and the amplifying element 34 is configured to amplify the displacement of the movable element 31 by a fixed multiple.
In particular use, the expansion length of the sample 200 to be measured is small, which makes the displacement of the movable member 31 very insignificant, which makes measurement and subsequent calculation difficult and has large error. Therefore, in the embodiment, the measuring device 3 amplifies the displacement of the movable element 31 by the amplifying element 34, so that the distance measuring element 35 can more easily measure the displacement amplified by the amplifying element 34, and errors in measurement are reduced.
Specifically, the amplifying assembly 34 includes: a first rack 341 and a transmission member 342. The first rack 341 is disposed on the movable member 31 to extend along the expansion direction; the transmission component 342 includes a rod-shaped main body 3423, and a first gear 3421 and a second gear 3422 disposed at two ends of the rod-shaped main body 3423, wherein the first gear 3421 is engaged with the first rack 341, and the circumference of the second gear 3422 is greater than the circumference of the first gear 3421.
In this embodiment, the displacement of the movable element 31 in the amplifying element 34 is transmitted to the first gear 3421 through the first rack 341, and then the second gear 3422 is driven to move through the first gear 3421. Since the second gear 3422 and the first gear 3421 are coaxially installed at both ends of the rod-shaped main body 3423, so that the angular displacement of the first gear 3421 and the second gear 3422 is the same, and the circumference of the second gear 3422 is larger than that of the first gear 3421, this makes the linear displacement of the second gear 3422 during rotation larger than that of the first gear 3421, thus completing the amplification of the displacement of the movable member 31.
Further, the second gear 3422 is located the installation region is in one side in the direction of expansion, and has and is close to the first side of installation region and keeps away from the second side of installation region, the focus of second gear 3422 is relative the first side is closer to the second side sets up, in order when the sample 200 that awaits measuring does not expand, the second gear 3422 is kept away from under the effect of gravity the direction of installation region is rotatory, and drives the moving part 31 orientation is located in the installation region the sample 200 that awaits measuring is movable, in order to support tightly the sample 200 that awaits measuring.
In this embodiment, when the movable element 31 is pushed by the sample 200, the second gear 3422 rotates toward the mounting region, i.e. rotates toward the first side. When the second gear 3422 rotates toward the second side, the movable element 31 is driven by the first gear 3421 to move toward the measuring side, so as to abut against the sample 200 to be measured. When the sample 200 to be detected does not thermally expand, the second gear 3422 rotates toward the first side edge under the action of the gravity center of the second gear, so that the movable element 31 moves toward the measuring side edge to tightly abut against the sample 200 to be detected, which can ensure that the displacement of the movable element 31 is the same as the expansion length of the sample 200 to be detected, so that the error of the detection apparatus 100 is smaller, and the detection is more accurate.
Specifically, the second gear 3422 is semicircular, and in an embodiment of the present invention, the second gear 3422 is provided with a counterweight structure at a position close to the second side edge. This causes the center of the second gear 3422 to be biased toward the second side, thereby moving the movable member 31 toward the sample 200.
In another embodiment of the present invention, the second gear 3422 is provided with a notch at a position close to the first side edge. This also causes the center of gravity of the second gear 3422 to be biased toward the second side edge, thereby moving the movable member 31 toward the sample 200.
Of course, the second gear 3422 may be close to the position of the second side edge and be equipped with the counterweight structure, and be close to simultaneously the position of the first side edge is equipped with the breach, so can let the second gear 3422 be in the first side edge with the weight difference of second side edge is more, so make the focus skew more obvious, can let the moving part 31 with the tighter of the sample 200 butt that awaits measuring.
Specifically, the distance measuring assembly 35 includes: scale 351 and indicator 352. The scale 351 is fixedly mounted on the base 1, and a plurality of scale bars 351a are arranged on the scale 351 at intervals along the expansion direction; the indicating member 352 is slidably mounted on the scale 351 along the expansion direction, the indicating member 352 is provided with a second rack 3521 extending along the expansion direction and an indicating needle 3522 for pointing to the scale 351a, and the second rack 3521 is engaged with the second gear 3422 to drive the indicating needle 3522 to point to different scales 351a when the movable element 31 moves.
In this embodiment, the linear displacement of the second gear 3422 also needs to be measured to obtain the accurate displacement, and actually, the distance measuring device 35 directly measures the linear displacement of the second gear 3422, and thus obtains the displacement of the movable element 31. The second gear 3422 is engaged with the second gear 3521, so that the second gear 3422 drives the indicating member 352 to move, and the linear displacement of the second gear 3422 is the same as the displacement of the indicating member 352. When the indicator 352 is activated, the pointer 3522 is displaced relative to the plurality of scale bars 351a, so that the pointer 3522 points to different scales, thereby identifying the displacement of the indicator 352, i.e. the linear displacement of the second gear 3422, and facilitating the subsequent calculation of the linear expansion coefficient of the sample 200 to be measured.
The present invention further provides a measurement method based on the detection apparatus 100 according to any of the above embodiments, fig. 4 is a schematic flow chart of an embodiment of the measurement method, please refer to fig. 4, and the measurement method includes:
s10: the expansion magnification of the sample 200 to be tested is obtained.
S20: and determining detection parameters according to the expansion magnification, wherein the detection parameters comprise the size of the sample 200 to be detected and the target temperature of the temperature transfer medium.
S30: and controlling the temperature control structure to heat and maintain the temperature of the temperature transfer medium at the target temperature.
S40: the displacement amount of the mover 31 is acquired.
S50: and acquiring the linear expansion coefficient of the sample 200 to be detected according to the displacement and the size of the sample 200 to be detected.
Because the linear expansion coefficient of the material is generally small, the linear expansion coefficient is generally n × 10 when the material is used -6 1/deg.c, which makes it necessary to amplify the linear expansion coefficient of the sample 200 to be measured when the detection apparatus 100 is used specifically, so that it is more convenient to calculate and the measurement error is smaller. Therefore, in this embodiment, the measurement method first obtains the expansion magnification of the sample 200 to be detected, so as to determine the magnification required for the sample 200 to be detected, and sets the detection parameters according to the expansion magnification. The detection parameter may specifically be the size of the sample 200 to be detected, or the temperature of the temperature transfer medium, which may amplify the calculation result. For example, when the difference between the target temperature and the current temperature is larger, the expansion length of the sample 200 to be measured is naturally larger. When the displacement is measured, the linear expansion coefficient of the sample 200 can be calculated by a known calculation method of the linear expansion coefficient.
Further, the measuring apparatus 3 further includes an amplifying component 34, the amplifying component 34 includes a first rack 341 and a transmission component 342 extending along the expansion direction and disposed on the movable element 31, the transmission component 342 includes a rod-shaped main body 3423, and a first gear 3421 and a second gear 3422 disposed at two ends of the rod-shaped main body 3423, the first gear 3421 is engaged with the first rack 341, and a circumference of the second gear 3422 is greater than a circumference of the first gear 3421.
The detection parameter further includes a circumferential length ratio of the first gear 3421 and the second gear 3422. Before the step of controlling the temperature control structure to heat and maintain the temperature of the temperature transfer medium at the target temperature, the method further comprises:
s21: the specifications of the first gear 3421 and the second gear 3422 are selected and assembled according to the circumferential length ratio.
In the present embodiment, the specific structure of the detecting device 100 also considers the test result, so that the amplifying element 34 is provided, and the displacement of the movable element 31 is amplified by the circumferential length ratio of the second gear 3422 to the first gear 3421. Therefore, the detection parameters further include a circumferential length ratio of the first gear 3421 to the second gear 3422, and before measurement, the first gear 3421 and the second gear 3422 with proper specifications are selected according to the circumferential length ratio for use, so as to amplify the displacement of the movable element 31 to a proper multiple.
Generally, the linear expansion coefficient is generally n × 10 -6 1/deg.C, thus amplifying the linear expansion coefficient of the sample 200 to be measured by 10 6 The doubling may be more appropriate. Certainly, there are many specific implementation methods, for example, 1000mm of the sample 200 to be measured is selected, the temperature of the temperature transmission medium is increased by 50 ℃, and then the first gear 3421 and the second gear 3422 with the perimeter ratio of 20 are selected, so that the measurement is more convenient, and the measurement result is more intuitive.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A test device for testing the linear expansion coefficient of a test sample, said test device comprising:
the device comprises a base, a temperature sensor and a temperature sensor, wherein the base is provided with an installation groove with an upward opening, the installation groove is used for accommodating a heat transfer medium, an installation area for installing the sample to be measured is arranged in the installation groove, and the installation area is provided with a measurement side and the rest installation side;
the temperature control structure is arranged on the base and used for controlling the temperature of the temperature transfer medium to be kept at a target temperature;
the limiting structure is arranged on the mounting side and used for fixing the sample to be tested in the mounting area; and (c) a second step of,
the measuring device comprises a moving part and a distance measuring component, wherein the moving part and the distance measuring component are movably arranged on the measuring side, so that when the sample to be measured at the mounting area expands and extends out of the measuring side, the moving part is driven and generates displacement along the expansion direction, and the distance measuring component is used for measuring the displacement of the moving part.
2. The detecting device for detecting the expansion of the engine cylinder according to claim 1, wherein the measuring device comprises a sliding groove arranged in the mounting groove, the sliding groove extends along the expansion direction, the movable member is provided with a sliding protrusion corresponding to the sliding groove, and the sliding protrusion is in sliding fit with the sliding groove.
3. The detecting device for detecting the rotation of a motor rotor as claimed in claim 2, wherein the measuring device further comprises two mounting plates which are arranged outside the mounting region, the two mounting plates are respectively arranged at two opposite sides of the measuring side, each mounting plate extends along the expansion direction, and the two mounting plates are respectively oppositely provided with the sliding grooves.
4. The detecting device according to claim 1 or 2, wherein the measuring device further comprises an amplifying element, the amplifying element is respectively connected to the movable member and the distance measuring element, and the amplifying element is configured to amplify the displacement of the movable member by a fixed factor.
5. The detection apparatus of claim 4, wherein the amplification assembly comprises:
the first rack extends along the expansion direction and is arranged on the movable piece; and (c) a second step of,
the transmission part comprises a rod-shaped main body, and a first gear and a second gear which are arranged at two ends of the rod-shaped main body, wherein the first gear is meshed with the first rack, and the perimeter of the second gear is larger than that of the first gear.
6. The detecting device according to claim 5, wherein the second gear is disposed on one side of the mounting region in the expansion direction, and has a first side close to the mounting region and a second side far from the mounting region, and a center of gravity of the second gear is disposed closer to the second side than the first side, so that when the sample to be detected is not expanded, the second gear rotates toward a direction far from the mounting region under the action of gravity and drives the movable member to move toward the sample to be detected in the mounting region, so as to tightly abut against the sample to be detected.
7. The sensing device of claim 6, wherein the second gear is semi-circular, wherein:
the second gear is provided with a counterweight structure at a position close to the second side edge; and/or the presence of a gas in the gas,
the second gear is provided with a notch at a position close to the first side edge.
8. The detection apparatus of claim 5, wherein the ranging component comprises:
the scale part is fixedly arranged on the base, and a plurality of scale strips are distributed on the scale part at intervals along the expansion direction; and the number of the first and second groups,
the indicating piece is installed on the scale piece in a sliding mode along the expansion direction, the indicating piece is provided with a second rack extending along the expansion direction and an indicating needle used for pointing to the scale strip, and the second rack is meshed with the second gear so that the indicating needle is driven to point to different scale strips when the movable piece moves.
9. A measuring method based on the detecting device according to any one of claims 1 to 8, characterized in that the measuring method comprises:
obtaining the expansion magnification of a sample to be detected;
determining detection parameters according to the expansion magnification, wherein the detection parameters comprise the size of the sample to be detected and the target temperature of the temperature transfer medium;
controlling the temperature control structure to heat the temperature of the heat transfer medium and keep the temperature at the target temperature;
acquiring the displacement of the movable piece;
and acquiring the linear expansion coefficient of the sample to be detected according to the displacement and the size of the sample to be detected.
10. The measuring method according to claim 9, wherein the measuring apparatus further comprises an amplifying assembly, the amplifying assembly comprises a first rack extending along the expansion direction and disposed on the movable member, and a transmission member, the transmission member comprises a rod-shaped body, and a first gear and a second gear disposed at two ends of the rod-shaped body, the first gear is engaged with the first rack, and the second gear has a larger circumference than the first gear;
the detection parameter further comprises a perimeter ratio of the first gear and the second gear;
before the step of controlling the temperature control structure to heat and maintain the temperature of the temperature transfer medium at the target temperature, the method further comprises:
and selecting the specifications of the first gear and the second gear according to the perimeter ratio and assembling.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117030784A (en) * | 2023-10-08 | 2023-11-10 | 江苏穹宇机械科技有限公司 | Wheel belt thermal expansion and contraction performance testing device of steam rotary kiln |
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- 2022-05-10 CN CN202210506533.1A patent/CN114923948A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117030784A (en) * | 2023-10-08 | 2023-11-10 | 江苏穹宇机械科技有限公司 | Wheel belt thermal expansion and contraction performance testing device of steam rotary kiln |
| CN117030784B (en) * | 2023-10-08 | 2023-12-15 | 江苏穹宇机械科技有限公司 | Wheel belt thermal expansion and contraction performance testing device of steam rotary kiln |
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