CN114778319A - Production auxiliary device for testing strength of heat insulation plate and testing method - Google Patents
Production auxiliary device for testing strength of heat insulation plate and testing method Download PDFInfo
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- CN114778319A CN114778319A CN202210415994.8A CN202210415994A CN114778319A CN 114778319 A CN114778319 A CN 114778319A CN 202210415994 A CN202210415994 A CN 202210415994A CN 114778319 A CN114778319 A CN 114778319A
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- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/14—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by dead weight, e.g. pendulum; generated by springs tension
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
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Abstract
The invention discloses a production auxiliary device and a test method for testing the strength of a heat insulation plate, wherein the production auxiliary device comprises a conveying mechanism, a pressure sensor and a controller; the conveying mechanism is used for conveying the sample heat insulation plate; the pressure sensor is used for acquiring a pressure signal of the sample heat insulation plate in real time and transmitting the pressure signal to the controller; the controller is used for receiving pressure signals collected by the pressure sensor, is electrically connected with the start-stop control unit of the conveying mechanism, and sends out an instruction to close the conveying mechanism when the pressure signals received by the controller are changed. The production auxiliary device can obtain the breaking length of the sample heat insulation plate, the dead weight resistance of the sample can be calculated and obtained based on the obtained breaking length, the maximum allowable length of the heat insulation plate in actual production is determined by combining the position difference of the maximum bending moment generated by the production auxiliary device and the heat insulation plate in actual production based on the obtained breaking length, and then the relation among density, the maximum allowable length and the maximum strength is obtained.
Description
Technical Field
The invention relates to the technical field of heat insulation plate production, in particular to a production auxiliary device and a test method for testing the strength of a heat insulation plate.
Background
The nanometer heat insulation board is formed by taking low heat conduction nanometer powder as a main body, adding reinforcing fiber and infrared opacifier mixed dry powder and performing compression molding.
When the production is carried out in a large scale in a workshop, the strength of the prepared plate needs to be higher than that required for overcoming the self weight, the strength of the plate is low, and the problems of cracking, crushing and the like can be caused when the plate is disassembled and transported. The higher the molding density, the higher the strength, but the heat insulating property is affected by it, so it is necessary to select an appropriate density for molding.
Therefore, if the relation among the density, the size and the strength of the nanometer heat insulation board can be obtained, the size and the density required by the production of the nanometer heat insulation board can be determined, the density of the nanometer heat insulation board is controlled in a reasonable range in the production process, the strength of the nanometer heat insulation board is ensured not to be too high or too low, and in a proper range, the heat insulation performance can be ensured, and the problems of cracking, crushing and the like can be avoided.
At present, no relevant technology is available for researching how to obtain the relationship among the density, the size and the strength of the nano heat insulation board, so that a new technology for obtaining the relationship among the density, the size and the strength of the nano heat insulation board is needed to be designed.
Disclosure of Invention
The invention aims to provide a production auxiliary device for testing the strength of a heat insulation plate, the production auxiliary device can be used for acquiring the breaking length of a sample heat insulation plate, and the dead weight resistance strength of the sample can be calculated and acquired based on the acquired breaking length; and based on the obtained fracture length, determining the maximum allowable length of the heat insulation plate in actual production by combining the position difference of the maximum bending moment generated by the production auxiliary device and the heat insulation plate in actual production, and further obtaining the relationship among the density, the maximum allowable length and the maximum strength.
In addition, the invention also provides a test method based on the production auxiliary device.
The invention is realized by the following technical scheme:
the production auxiliary device for testing the strength of the heat insulation plate comprises a conveying mechanism, a pressure sensor and a controller;
the conveying mechanism is used for conveying the sample heat insulation plate, and the sample heat insulation plate can be in relative displacement with the conveying mechanism under the conveying action of the conveying mechanism;
the pressure sensor is used for acquiring a pressure signal of the sample heat insulation plate in real time and transmitting the pressure signal to the controller;
the controller is used for receiving pressure signals collected by the pressure sensor, is electrically connected with the start-stop control unit of the conveying mechanism, and sends out an instruction to close the conveying mechanism when the pressure signals received by the controller change.
The conveying mechanism, the pressure sensor and the controller are all in the prior art, wherein the conveying mechanism is used for conveying the sample heat-insulating plate on the conveying mechanism to the front end of the sample heat-insulating plate in a high-altitude state, when the front end of the sample heat-insulating plate is high in altitude to a certain length, the sample heat-insulating plate is broken, and the conveying speed and the conveying time (the interval between the starting time and the stopping time of the conveying mechanism) of the conveying mechanism in the working process can be obtained. The controller can judge whether the sample heat insulating plate breaks according to the pressure signal change, and when the sample heat insulating plate breaks, the pressure signal changes suddenly.
The production auxiliary device can judge whether the sample heat insulation board is broken according to the pressure signal, stop the conveying mechanism when the sample heat insulation board is broken, obtain the transmission speed and the transmission time of the conveying mechanism, and directly calculate the breaking length, so that the broken point of the sample heat insulation board in the production auxiliary device is the tail end of the conveying mechanism (the tail end with reverse transmission is pointed, for example, in the attached drawing 1, the conveying mechanism transmits from left to right, and the tail end with the right end is the tail end of the conveying mechanism), namely the free length of the sample heat insulation board is equal to the transmission distance of the conveying mechanism.
Therefore, the production auxiliary device can accurately obtain the fracture length of the sample thermal insulation board, and the dead weight resistance of the sample can be calculated and obtained based on the obtained fracture length; and based on the obtained fracture length, determining the maximum allowable length of the heat insulation plate in actual production by combining the position difference of the maximum bending moment generated by the production auxiliary device and the heat insulation plate in actual production, and further obtaining the relation among density, the maximum allowable length and strength.
Furthermore, the device also comprises a fracture length calculation module, a speed acquisition module and a timer;
the speed acquisition module is used for acquiring the transmission speed of the transmission mechanism and transmitting the transmission speed to the fracture length calculation module;
the timer is used for collecting the transmission time of the transmission mechanism and transmitting the transmission time to the fracture length calculation module;
the fracture length calculation module is used for calculating the fracture length x of the sample heat insulation plate according to the transmission speed and the transmission time of the conveying mechanism, and the fracture length x is equal to the product of the transmission speed and the transmission time.
Further, the device also comprises a storage unit and an intensity calculation module;
the storage unit is used for storing maximum strength calculation data, and the data comprises a fracture length x, a stress point coordinate y of the sample thermal insulation board, an inertia moment Iz, a length l, a width w, a thickness h, a density rho and a gravity coefficient g;
the intensity calculation module is used for acquiring maximum intensity calculation data of the storage unit and calculating the maximum intensity sigma of the sample heat insulation plate based on the maximum intensity calculation model1。
The maximum intensity calculation model is as follows:
σ1＝Mmax·y/Iz
in the formula, σ1Maximum intensity in Pa, MmaxThe maximum bending moment is calculated by the following formula: qx2Q is uniform load, and q is rho lwh DEGg/l, rho is the density of the core material, the unit of bending moment is N.m, g is the gravity coefficient, and the unit is N/kg; l is the length of the sample heat insulation plate and is in mm, w is the width of the sample heat insulation plate and is in mm, and h is the thickness of the sample heat insulation plate and is in mm; y is the coordinate of the stress point, and h/2 is taken; IZ is the moment of inertia, and the rectangle is taken as wh3/12。
Further, the system also comprises a maximum allowable length calculation module, wherein the maximum allowable length calculation module acquires the fracture length x and calculates the maximum allowable length L based on the fracture length x.
The calculation formula for obtaining the fracture length x and the maximum allowable length L by combining the position difference of the maximum bending moment generated by the heat insulation plate during production auxiliary device and actual production is as follows:
x＝0.5L
as shown in FIG. 3, the sample insulation panel on the production aid of the present invention can be considered as a cantilever beam, and point D has a maximum bending moment qx 22; in the actual production of the insulation board, as shown in fig. 4, the insulation board can be regarded as a simply supported beam, and the maximum bending moment qL is arranged at the point l/2 of the midpoint AB2/8, based on maximum intensity σ1Let qx2/2 equals qL2And/8, obtaining x being 0.5L.
Further, a display unit for displaying the maximum intensity σ is included1With a corresponding density p and a maximum allowed length L.
Further, a pressure sensor is disposed above the distal end of the transport mechanism.
Further, a baffle is arranged at the bottom of the pressure sensor.
Further, the conveying mechanism is a conveyor belt.
The test method based on the production auxiliary device comprises the following steps:
s1, preparing a sample heat insulation plate, and determining the size and the density rho of the sample heat insulation plate, wherein the size comprises a length l, a width w and a thickness h;
s2, placing the prepared sample heat insulation plate on a conveying mechanism, and aligning the front end of the sample heat insulation plate with the tail end of the conveying mechanism;
s3, starting the conveying mechanism through the controller, enabling the sample heat-insulating plate to move towards the conveying direction of the conveying mechanism, sensing a pressure signal in real time by a pressure sensor, transmitting the pressure signal to the controller, breaking and falling off the sample heat-insulating plate at the tail end of the conveying mechanism when the front end of the sample heat-insulating plate is empty to a certain length x, stopping the conveying mechanism by control driving, and recording the conveying speed and the conveying time of the conveying mechanism;
s4, calculating and obtaining the breaking length x of the sample heat insulation plate based on the transmission speed and the transmission time obtained in the step S3;
s5, calculating the maximum strength σ based on the length l, width w, thickness h and density ρ obtained in step S1, and the fracture length x obtained in step S41；
S6, breaking length x obtained based on step S4; maximum bending moment M generated by heat insulation plate during combination of production auxiliary device and actual productionmaxDetermining the maximum allowable length L of the heat insulation plate during actual production;
s7, determining the maximum allowable length L, the density rho and the maximum intensity sigma1The corresponding relationship of (2).
Further, in step S1, a plurality of samples are prepared for each of the standard formulation, standard density, and standard thickness sample insulation boards, and the test results are averaged.
Compared with the prior art, the invention has the following advantages and beneficial effects:
1. the production auxiliary device can accurately obtain the fracture length of the sample heat insulation plate, and the dead weight resistance of the sample can be calculated and obtained based on the obtained fracture length; and based on the obtained fracture length, the maximum allowable length of the heat insulation plate in actual production is determined by combining the position difference of the maximum bending moment generated by the production auxiliary device and the heat insulation plate in actual production, so that the relation among density, the maximum allowable length and the maximum strength is obtained, the relation is used for auxiliary production, the trial-manufacturing cost before production is reduced, and the production efficiency is improved.
2. The invention can obtain the lowest molding density database required by the plates with different sizes under different formulas in a statistical manner, can reduce the trial production cost during later production and improve the production efficiency.
3. According to the invention, the baffle is arranged at the bottom of the pressure sensor, so that the plate placed on the conveying mechanism can be prevented from tilting when the front end of the sample thermal baffle is too empty.
4. The production auxiliary device provided by the invention is simple in structure, can realize automatic control and data calculation, and has the advantage of convenience in operation.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:
FIG. 1 is a schematic view of the structure of a production assisting apparatus of the present invention;
FIG. 2 is a schematic view of the production assistance device of the present invention when the thermal insulation board is broken;
FIG. 3 is a schematic view showing a heat insulating plate in the production assisting apparatus of the invention as a cantilever beam;
FIG. 4 is a schematic view of the insulation panel during production as a simply supported beam;
FIG. 5 is a logic diagram of the present invention.
Reference numbers and corresponding part names in the figures:
1-a pressure sensor, 2-a baffle, 3-a sample thermal baffle and 4-a conveying mechanism.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and the accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not used as limiting the present invention.
Example 1:
as shown in fig. 1 and 2, the production auxiliary device for testing the strength of the heat insulation board comprises a conveying mechanism 4, a pressure sensor 1 and a controller;
the conveying mechanism 4 is used for conveying the sample heat-insulating plate 3, the sample heat-insulating plate 3 can be relatively displaced with the conveying mechanism 4 under the conveying action of the conveying mechanism 4, the conveying mechanism 4 is used for conveying the sample heat-insulating plate 3 on the conveying mechanism to enable the front end of the sample heat-insulating plate 3 to be in a state of being in a high altitude, and when the front end of the sample heat-insulating plate is in a high altitude state to a certain length, the sample heat-insulating plate is broken;
the pressure sensor 1 is used for acquiring a pressure signal of the sample heat insulation plate 3 in real time and transmitting the pressure signal to the controller;
the controller is used for receiving pressure signals collected by the pressure sensor 1, is electrically connected with the start-stop control unit of the conveying mechanism 4, and sends out an instruction to close the conveying mechanism 4 when the pressure signals received by the controller change.
In the present embodiment, the pressure sensor 1 is disposed above the tip of the conveyance mechanism 4; the bottom of the pressure sensor 1 is provided with a baffle 2; the conveying mechanism 4 is a conveyor belt.
In the present embodiment, the front end of the sample insulation board 3 is found to be at a high level relative to the movement of the sample insulation board 3, and may be understood as being at a high level, such as the right end in fig. 1, and the end of the transport mechanism 4 is also referred to as the right end in fig. 1 and 2.
Through this embodiment the production assisting apparatus can acquire the transport speed and the transport time of the transport mechanism 4, can directly calculate the breaking length x of the sample insulation board 3 of the breaking length based on the transport speed and the transport time, and can calculate the dead weight resistance strength of the sample, that is, the maximum strength σ of the sample based on the acquired breaking length x1(ii) a And determining the maximum allowable length L of the heat insulation plate during actual production by combining the position difference of the maximum bending moment generated by the heat insulation plate during actual production and the production auxiliary device based on the acquired fracture length x, and further obtaining the density rho, the maximum allowable length L and the maximum strength sigma1The specific process of the relationship is as follows:
s1, preparing a sample heat insulation plate 3, and determining the size and the density rho of the sample heat insulation plate 3, wherein the size comprises the length l, the width w and the thickness h; the sample heat insulation plate 3 is cut according to the standard size of 100mm by 600 mm; preparing a plurality of samples by using each sample heat insulation plate with a standard formula, standard density and standard thickness, and averaging test results;
s2, placing the prepared sample heat insulation plate 3 on the conveying mechanism 4, and aligning the front end of the sample heat insulation plate 3 with the tail end of the conveying mechanism 4;
s3, starting the conveying mechanism 4 through the controller, enabling the sample heat-insulating plate 3 to move towards the conveying direction of the conveying mechanism 4, sensing a pressure signal in real time by the pressure sensor 1, transmitting the pressure signal to the controller, breaking and falling off the sample heat-insulating plate 3 at the tail end of the conveying mechanism 4 when the front end of the sample heat-insulating plate 3 is up to a certain length x, stopping the conveying mechanism 4 by control driving, and recording the conveying speed and the conveying time of the conveying mechanism 4;
s4, calculating and obtaining the breaking length x of the sample heat insulation plate 3 based on the transmission speed and the transmission time obtained in the step S3, wherein the breaking length x is equal to the product of the transmission speed and the transmission time;
s5, calculating the maximum strength σ based on the length l, width w, thickness h and density ρ obtained in step S1, and the fracture length x obtained in step S41；
The maximum intensity calculation model is as follows:
σ1＝Mmax·y/Iz
in the formula, σ1Maximum intensity in Pa, MmaxThe maximum bending moment is calculated by the following formula: qx2Q is uniform load, wherein p is lwh g/l, p is core material density, bending moment is N m, g is gravity coefficient and is N/kg; l is the length of the sample heat insulation plate and is in mm, w is the width of the sample heat insulation plate and is in mm, and h is the thickness of the sample heat insulation plate and is in mm; y is the coordinate of the stress point, and h/2 is taken; IZ is the moment of inertia, and the rectangle is taken as wh3/12
S6, breaking length x obtained based on step S4; maximum bending moment M generated by heat insulation plate during combination of production auxiliary device and actual productionmaxDetermining the maximum allowable length L of the heat insulation plate during actual production;
s7, determining the maximum allowable length L, the density rho and the maximum intensity sigma1The corresponding relationship of (1).
In the embodiment, the load q and the thickness h are obtained by weighing and measuring the thickness of the mark plates (600mm x 100mm) with different formulas, the sample heat insulation plate 3 is conveyed on the conveying belt at a constant speed, and when the sample heat insulation plate is usedThe front end of the pressure sensor 3 is broken and falls off at the port of the conveyor belt when the front end is in a certain length x, and the pressure value of the pressure sensor 1 changes suddenly to stop the conveyor belt. q, h and x are substituted into a maximum intensity calculation model to calculate the maximum intensity sigma1(ii) a And calculating the maximum allowable length L of the simply supported beam in the figure 4 according to the fracture length x, wherein x is 0.5L. The load q is related to the density rho, finally a rho, h and L data editing parameter table can be collected, and the lowest molding density can be determined according to the L, h size of actual production under the determined formula.
Example 2:
as shown in fig. 1, fig. 2, and fig. 5, the present embodiment is based on embodiment 1, and further includes a fracture length calculating module, a speed acquiring module, and a timer;
the speed acquisition module is used for acquiring the transmission speed of the transmission mechanism 4 and transmitting the transmission speed to the fracture length calculation module;
the timer is used for collecting the transmission time of the transmission mechanism 4 and transmitting the transmission time to the fracture length calculation module;
the fracture length calculation module is used for calculating the fracture length x of the sample heat insulation plate 3 according to the transmission speed and the transmission time of the transmission mechanism 4;
the device also comprises a storage unit and an intensity calculation module;
the storage unit is used for storing maximum strength calculation data, and the data comprises a fracture length x, a stress point coordinate y of the sample heat insulation plate 3, an inertia moment IZ, a length l, a width w, a thickness h, a density rho and a gravity coefficient g;
the intensity calculation module is used for acquiring maximum intensity calculation data of the storage unit and calculating the maximum intensity sigma of the sample heat insulation plate 3 based on the maximum intensity calculation model1；
The maximum allowable length calculation module is used for acquiring the fracture length x and calculating the maximum allowable length L based on the fracture length x;
further comprising a display unit for displaying the maximum intensity σ1The display element may be in relation to the corresponding density p and the maximum allowed length LAnd a display screen.
In the embodiment, by providing the fracture length calculation module, the strength calculation module, and the maximum allowable length calculation module, automatic acquisition and calculation of data of the production auxiliary device can be realized.
The above-mentioned embodiments, objects, technical solutions and advantages of the present invention are further described in detail, it should be understood that the above-mentioned embodiments are only examples of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
It should be noted that the structures, ratios, sizes, and the like shown in the drawings attached to the present specification are only used for matching the disclosure of the present specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions of the present invention, so that the present invention has no technical essence, and any structural modification, ratio relationship change, or size adjustment should still fall within the scope of the present invention without affecting the function and the achievable purpose of the present invention. In addition, the terms such as "upper", "lower", "left", "right", "middle", etc. used in the present specification are used for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms may be changed or adjusted without substantial technical change.
Claims (10)
1. The production auxiliary device for testing the strength of the heat insulation plate is characterized by comprising a conveying mechanism (4), a pressure sensor (1) and a controller;
the conveying mechanism (4) is used for conveying the sample heat-insulating plate (3), and the sample heat-insulating plate (3) can be relatively displaced with the conveying mechanism (4) under the conveying action of the conveying mechanism (4);
the pressure sensor (1) is used for acquiring a pressure signal of the sample heat insulation plate (3) in real time and transmitting the pressure signal to the controller;
the controller is used for receiving pressure signals collected by the pressure sensor (1), is electrically connected with the start-stop control unit of the conveying mechanism (4), and sends out an instruction to close the conveying mechanism (4) when the pressure signals received by the controller are changed.
2. The production assisting apparatus for testing the strength of a heat insulating board according to claim 1, further comprising a breaking length calculating module, a speed obtaining module and a timer;
the speed acquisition module is used for acquiring the transmission speed of the transmission mechanism (4) and transmitting the transmission speed to the fracture length calculation module;
the timer is used for collecting the transmission time of the transmission mechanism (4) and transmitting the transmission time to the fracture length calculation module;
and the fracture length calculation module is used for calculating the fracture length x of the sample heat insulation plate (3) according to the transmission speed and the transmission time of the transmission mechanism (4).
3. The production assisting apparatus for testing the strength of a heat insulating board according to claim 2, further comprising a storage unit and a strength calculating module;
the storage unit is used for storing maximum strength calculation data, and the data comprises a fracture length x, a stress point coordinate y of the sample heat insulation plate (3), an inertia moment IZ, a length l, a width w, a thickness h, a density rho and a gravity coefficient g;
the intensity calculation module is used for acquiring maximum intensity calculation data of the storage unit and calculating the maximum intensity sigma of the sample heat insulation plate (3) based on the maximum intensity calculation model1。
4. The production assisting apparatus for testing the strength of the heat-insulating board according to claim 3, further comprising a maximum allowable length calculating module which obtains a breaking length x and calculates a maximum allowable length L based on the breaking length x.
5. The production assisting device for testing strength of an insulating board according to claim 4, further comprising a display unit for displaying a maximum strength σ1With a corresponding density p and a maximum allowed length L.
6. A production aid for testing the strength of insulation panels according to any of claims 1-5, characterized in that the pressure sensor (1) is arranged above the end of the conveyor means (4).
7. The production assistant device for testing the strength of an insulating board according to claim 6, wherein a baffle (2) is provided at the bottom of the pressure sensor (1).
8. A production aid for testing the strength of insulation panels according to any of claims 1-5, characterized in that the conveying means (4) is a conveyor belt.
9. The method for testing the production support device according to any one of claims 1 to 8, comprising the steps of:
s1, preparing a sample heat insulation board (3), and determining the size and the density rho of the sample heat insulation board (3), wherein the size comprises the length l, the width w and the thickness h;
s2, placing the prepared sample heat insulation board (3) on a conveying mechanism (4) to enable the front end of the sample heat insulation board (3) to be aligned with the tail end of the conveying mechanism (4);
s3, starting the conveying mechanism (4) through the controller, enabling the sample heat-insulating plate (3) to move towards the conveying direction of the conveying mechanism (4), sensing a pressure signal in real time by the pressure sensor (1), transmitting the pressure signal to the controller, breaking and falling off the sample heat-insulating plate (3) at the tail end of the conveying mechanism (4) when the front end of the sample heat-insulating plate (3) is empty to a certain length x, stopping the conveying mechanism (4) through control driving, and recording the conveying speed and the conveying time of the conveying mechanism (4);
s4, calculating and obtaining the breaking length x of the sample heat insulation plate (3) based on the transmission speed and the transmission time obtained in the step S3;
s5, calculating the maximum strength σ based on the length l, width w, thickness h and density ρ obtained in step S1, and the fracture length x obtained in step S41；
S6, breaking length x obtained based on step S4; maximum bending moment M generated by heat insulation plate during combination of production auxiliary device and actual productionmaxDetermining the maximum allowable length L of the heat insulation plate during actual production;
s7, determining the maximum allowable length L, the density rho and the maximum intensity sigma1The corresponding relationship of (1).
10. The testing method according to claim 9, wherein in step S1, a plurality of samples are prepared for each of the standard formulation, standard density, and standard thickness sample insulation panels (3), and the test results are averaged.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210415994.8A CN114778319A (en) | 2022-04-20 | 2022-04-20 | Production auxiliary device for testing strength of heat insulation plate and testing method |
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| CN202210415994.8A CN114778319A (en) | 2022-04-20 | 2022-04-20 | Production auxiliary device for testing strength of heat insulation plate and testing method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116243328A (en) * | 2023-01-20 | 2023-06-09 | 松下神视电子（苏州）有限公司 | Sensor for detecting a position of a body |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116243328A (en) * | 2023-01-20 | 2023-06-09 | 松下神视电子（苏州）有限公司 | Sensor for detecting a position of a body |
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