CN119374471B - Method for manufacturing strain gauge sensor by hot melting and strain gauge sensor - Google Patents
Method for manufacturing strain gauge sensor by hot melting and strain gauge sensor Download PDFInfo
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- CN119374471B CN119374471B CN202411921483.9A CN202411921483A CN119374471B CN 119374471 B CN119374471 B CN 119374471B CN 202411921483 A CN202411921483 A CN 202411921483A CN 119374471 B CN119374471 B CN 119374471B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/16—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring the deformation in a solid, e.g. by resistance strain gauge
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
- B05D5/10—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain an adhesive surface
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- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
- Measurement Of Force In General (AREA)
Abstract
The invention is suitable for the technical field of sensor manufacturing, and provides a method for manufacturing a strain gauge sensor by hot melting and the strain gauge sensor. The method comprises the steps of selecting the number of strain gauges which are not less than the number of the wall surfaces of the patch according to the number of the wall surfaces of the patch to be attached to a bearing piece, selecting the number of fixing adhesives which are not less than the number of the strain gauges according to the number of the strain gauges, enabling the melting points of the fixing adhesives to be different, heating to enable the fixing adhesives to be melted, and enabling the strain gauges to be attached to the bearing piece after being cooled through the melted fixing adhesives. In the embodiment of the invention, the heating temperature is set according to the sequence of the melting points of the fixing adhesives from high to low, the strain gauge is fixed by melting the fixing adhesive with high melting point, and then the fixing adhesive with low melting point is melted, so that the fixing adhesive with high melting point can not be melted when the fixing adhesive with low melting point is heated, the influence on the positions of the strain gauge which is adhered completely is avoided, the positions of the strain gauges are accurate, the deviation is avoided, and the quality of products is improved.
Description
Technical Field
The invention belongs to the technical field of sensor manufacturing, and particularly relates to a method for manufacturing a strain gauge sensor by hot melting and the strain gauge sensor.
Background
The strain gauge sensor can cause the change of resistance, capacitance and the like by utilizing the strain gauge to detect the change of factors such as force, light, temperature and the like in the use environment, so as to generate corresponding electric signals, and the measurement of the change factor value can be realized.
When the strain gauge is specifically arranged, the strain gauge is generally stuck to the detection beam to realize installation, the strain gauge can convert the strain on the detection beam into electric signals to be output, and the actual strain value of the detection beam can be calculated by measuring the change of the resistance of the strain gauge. The cross section of the detection beam is rectangular and comprises an upper wall surface, a lower wall surface, a left wall surface and a right wall surface, wherein the upper wall surface is opposite to the lower wall surface, and the left wall surface is opposite to the right wall surface. In order to realize multi-direction detection, strain gauges are stuck on the upper surface, the lower surface, the left surface and the right surface of the detection beam, so that the detection can be realized through the strain gauges in different directions, and the sensitivity and the precision of the detection are improved. When the strain gauge is adhered to each wall surface of the detection beam, the fixing glue arranged on the detection beam is melted, the strain gauge is placed in the melted fixing glue, the strain gauge on the fixing glue sinks due to self gravity, and the fixing of the strain gauge is realized after the fixing glue is solidified.
In the related art, when the strain gauge is adhered to each wall, the fixing glue on each wall is melted at the same time, and the strain gauge is respectively placed in the fixing glue, and because the positions of the upper wall, the lower wall, the left wall and the right wall are different, the strain gauge at the positions of the lower wall, the left wall and the right wall is influenced by gravity, and the fixing position can deviate, so that the quality of a product is influenced.
Disclosure of Invention
In view of the above, the present invention provides a method for manufacturing a strain gauge sensor by hot melting and the strain gauge sensor, so as to solve the problem that the product quality is affected due to the offset of the bonding position of the strain gauge.
In order to solve the problems, the technical scheme of the invention is realized as follows:
A method of hot melt manufacturing a strain gage sensor for attaching a strain gage to a carrier, the method comprising the steps of:
1) Selecting the number of the strain gauges which are not less than the number of the wall surfaces of the patches according to the number of the wall surfaces of the patches, which are required to be attached with the strain gauges, of the bearing piece, wherein the number of the wall surfaces of the patches is not less than two;
2) The number of the fixing adhesives is selected according to the number of the strain gauges, the number of the fixing adhesives is not less than the number of the strain gauges, and the melting points of the fixing adhesives are different;
3) Heating to melt the fixing glue so that the strain gauge is adhered to the bearing piece through the melted fixing glue after being cooled;
wherein, the heating temperature is set according to the order of the melting point of each fixing adhesive from high to low.
In some embodiments, the fixing glue is selected according to the number of the wall surfaces of the patch according to the sequence from the high melting point to the low melting point, and the fixing glue is heated respectively to melt the fixing glue currently used so as to paste the fixing strain gauge surface by surface.
In some embodiments, the currently affixed wall is placed horizontally up at least after the strain gauge is placed into the melted fixing glue.
In some embodiments, the carrier is heated to a temperature at which the currently selected fixing glue melts before the strain gage is affixed to the carrier, and the fixing glue is placed on the wall of the desired patch and melted.
In some embodiments, the strain gauge is placed into the fixing glue after the current melting, so that the strain gauge is sunk, and after the fixing glue is cooled, the strain gauge is fixed, and the pasting of the strain gauge on the current wall surface is completed.
In some embodiments, the fixing glue which is melted at present is cooled and adhered on the current wall surface to finish the preset of the fixing glue on the current wall surface, wherein the fixing glue is selected according to the number of the wall surfaces of the patch according to the sequence from the high melting point to the low melting point, the preset of the fixing glue on each wall surface is finished surface by surface, and the types of the fixing glue on each wall surface are different.
In some embodiments, fixing glue is preset on each wall according to the number of the wall surfaces of the patch, the fixing glue is heated and melted respectively according to the sequence from the high melting point to the low melting point, strain gauges are placed into the fixing glue after the melting point is melted, and the strain gauges are fixed after the fixing glue is cooled.
In some embodiments, before the strain gauge is adhered to the carrier, fixing the corresponding number of strain gauges in different kinds of fixing adhesives one by one according to the number of wall surfaces of the patch, heating the carrier to a temperature at which the fixing adhesive selected at present can be melted, placing the fixing adhesive with the strain gauge fixed in advance on the wall surface of the patch to be melted, and cooling the fixing adhesive to finish the adhesion of the strain gauge on the current wall surface.
In some embodiments, the surface roughness is increased at least on the wall surface to be patched prior to the patching.
The embodiment of the invention also provides a strain gauge sensor, which is prepared by the method for manufacturing the strain gauge sensor by hot melting according to any embodiment, and comprises a bearing piece, wherein the bearing piece is provided with at least two wall surfaces, and at least one strain gauge is adhered to each wall surface through fixing glue.
The embodiment of the invention provides a method for manufacturing a strain gauge sensor by hot melting and the strain gauge sensor, the method comprises the following steps of according to the number of the surface mounting wall surfaces of a carrier on which a strain gauge needs to be attached, the number of the strain gauges is not less than the number of the wall surfaces of the patch, and the number of the wall surfaces of the patch is not less than two. And then the number of the fixing glue is selected according to the number of the strain gauges, wherein the number of the fixing glue is not less than the number of the strain gauges, and the melting points of the fixing glue are different. And heating to melt the fixing glue, so that the strain gauge is adhered to the bearing piece through the melted fixing glue after being cooled. In the embodiment of the invention, the heating temperature is set according to the order of the melting point of each fixing adhesive from high to low. In this way, the strain gauge is fixed by melting the fixing adhesive with high melting point, and then the fixing adhesive with low melting point is melted, and the fixing adhesive with high melting point is not melted when the fixing adhesive with low melting point is heated. According to the heating sequence, the influence on the positions of the strain gauges which are adhered is well avoided, so that the positions of the wall surfaces can be kept accurate after the strain gauges are adhered, and the product quality and the detection accuracy of the strain gauge sensor are improved.
Drawings
FIG. 1 is a flow chart of a method for manufacturing a strain gauge sensor by hot melt according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a strain gauge sensor according to an embodiment of the present invention.
Reference numerals illustrate:
1. strain gauge sensor, 11, bearing piece, 12, strain gauge, 13, fixing glue.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
The individual features described in the specific embodiments can be combined in any suitable manner, without contradiction, for example by combination of different specific features, to form different embodiments and solutions. Various combinations of the specific features of the invention are not described in detail in order to avoid unnecessary repetition.
In the following description, references to the term "first/second/are merely to distinguish between different objects and do not indicate that the objects have the same or a relationship therebetween. It should be understood that references to orientations of "above", "below", "outside" and "inside" are all orientations in normal use, and "left" and "right" directions refer to left and right directions illustrated in the specific corresponding schematic drawings, and may or may not be left and right directions in normal use.
It should be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one.," does not exclude the presence of additional identical elements in a process, method, article, or apparatus that comprises the element. "plurality" means greater than or equal to two.
The embodiment of the invention provides a method for manufacturing a strain gauge sensor by hot melting, which is used for attaching a strain gauge to a bearing piece. The bearing piece is mainly used for supporting the strain gage, so that the strain gage has a stable detection position, and the change of corresponding detection factors (such as pressure, temperature or humidity) can be reliably detected accurately. Specifically, when the strain gauge is used for detecting the pressure applied to the carrier, the carrier is deformed under the action of external force, and the strain gauge adhered to the carrier is deformed. During deformation, the resistance of the strain gage changes as the strain increases. By measuring the change in resistance, the actual strain value can be deduced. The bearing member may also be referred to as a detection beam or an elastic beam, and the specific arrangement and the structural principle are basically the same as those of the prior art, and are not described in detail herein. In the embodiment of the present invention, the carrier is illustrated, and is not limited to an object to which the strain gauge can be attached.
In the embodiment of the invention, as shown in fig. 1, the method includes the steps of selecting the number of the needed strain gauges according to the number of the wall surfaces of the patch on which the strain gauges are needed to be attached on the carrier, and the selected number of the strain gauges is not less than the number of the wall surfaces of the patch, so as to ensure that enough strain gauges can be replaced when the strain gauges are lost or damaged, for example, so as to meet the current patch needs. When selecting the carrier, it is necessary to have at least not less than two patch wall surfaces.
And then the number of the fixing glue is selected according to the number of the selected strain gauges, and the number of the fixing glue is not less than the number of the strain gauges. At least each strain gauge is correspondingly provided with a fixing adhesive so as to ensure that different kinds of fixing adhesives are used for fixing at least when the strain gauges are adhered to different wall surfaces. And the melting point of each fixing adhesive needs to be ensured to be different among the different types of fixing adhesives.
After the number of needed fixing adhesives is selected according to the number of the wall surfaces of the patches and the number of the strain gauges, and the melting points of the fixing adhesives used for the strain gauges which are required to be adhered on different wall surfaces are different, the fixing adhesives which are selected currently are heated to be melted, so that the strain gauges are adhered to the bearing piece after being cooled through the melted fixing adhesives, and the current strain gauge adhesion is completed. The other remaining strain gages are attached in the same manner. Specifically, in the embodiment of the present invention, the heating is performed to melt each fixing glue, and the heating temperature is set in order of the melting point of each fixing glue from high to low. That is, when the first strain gauge is attached, the fixing glue having the highest melting point is used first, and the heating temperature is set to be not lower than the melting point of the fixing glue, so that the fixing glue can be melted to be attached. When the second strain gauge is stuck, the melting point of the adopted fixing glue is lower than that of the fixing glue used by the first strain gauge, but higher than that of the fixing glue used by the third strain gauge. In this way, the strain gauges are stuck to different wall surfaces one by one according to the selection method until at least one strain gauge is stuck to all the wall surfaces needing to be stuck.
Specifically, when the strain gauge is adhered to different wall surfaces, fixing adhesives having different melting points are used, and heating is sequentially performed in order of the melting points from high to low. Meanwhile, the heating temperature is correspondingly set according to the melting point of the fixing glue which is required to be melted at present, so that when the fixing glue is heated and melted, even if the adhered strain gages are heated together, the adhered fixing glue cannot be melted due to the current heating temperature, the position of the adhered strain gages cannot be influenced when the next strain gages are heated and adhered, the operation process of adhering the strain gages on all wall surfaces is finished, the positions of the adhered strain gages can be kept stable and accurate, the positions of the strain gages cannot be offset due to mutual influence, and the quality of products is improved.
The method for manufacturing the strain gauge sensor by hot melting comprises the steps of selecting the number of strain gauges with the number not less than the number of the wall surfaces of the patches according to the number of the wall surfaces of the patches required to be attached to the carrier, wherein the number of the wall surfaces of the patches on the carrier is not less than two. And selecting the number of the fixing adhesives according to the number of the strain gauges, wherein the number of the fixing adhesives is not less than the number of the strain gauges, and the melting points of the selected fixing adhesives are set to be different. And heating to melt the fixing glue, so that the strain gauge is adhered to the bearing piece through the melted fixing glue after being cooled. In the embodiment of the invention, the heating temperature is set according to the sequence of the melting points of all the fixing adhesives from high to low, the fixing adhesive with the highest melting point is melted first, and then the heating temperature is reduced, so that the fixing adhesive with the melting point lower than the previous melting point is melted. In this way, the strain gauge is fixed by melting the fixing adhesive with high melting point, and then the fixing adhesive with low melting point is melted, so that the fixing adhesive with high melting point is not melted when the fixing adhesive with low melting point is heated. According to the heating sequence, the situation that all fixing adhesives are melted due to the temperature problem to cause the position of the strain gauge which is adhered is well avoided, under the preparation method, when the strain gauge is adhered to all the wall surfaces, the position of the strain gauge which is adhered can not be offset due to the mutual influence in the adhering process, the position of the strain gauge which is adhered can be kept accurate, the accurate detection of the pressure change of the bearing part can be reliably realized, and the quality of products is improved.
In some embodiments, when selecting a carrier to which strain gages are to be attached, it is necessary to determine that the carrier has at least two or more wall surfaces. The number of wall surfaces of the carrier as a whole should be greater than or equal to the number of wall surfaces of the patch to which the strain gauge needs to be attached. In this way it is ensured that the selected strain gauges can be glued to different wall surfaces.
In some embodiments, the selected strain gauges are respectively adhered to different wall surfaces, that is, the number of the strain gauges is in one-to-one correspondence with the number of the wall surfaces to be adhered, so that each different wall surface is respectively adhered with one strain gauge. In other embodiments, at least one strain gauge may be adhered to one wall, as if two or three strain gauges are adhered to one wall, on the premise of meeting the detection requirement. In this case, when the strain gauge is attached to the same wall surface, the strain gauge may be attached to the same wall surface by using a fixing adhesive having the same melting point, or may be attached to the same wall surface. The strain gauges can be stuck by fixing adhesives with different melting points, and under the mode, the strain gauges are also subjected to hot melting according to the sequence from high melting points to low melting points, and then are stuck individually one by one.
Specifically, before the patch, the number of the wall surfaces of the patch is required to be determined to be larger than the number of the strain gauges, and the number of the fixing glue is required to be larger than the number of the strain gauges. In this way, each strain gage is provided with at least one fixing glue for use, and at least one different wall-fed strain gage is held in place.
In some embodiments, the fixing glue is selected according to the number of the wall surfaces of the patch according to the sequence from the high melting point to the low melting point, and the fixing glue used currently is respectively heated and melted so as to paste and fix the strain gauge surface by surface. The number of the fixing glue needed to be used is determined by the number of the wall surfaces of the patch to which the strain gauge is attached according to the need, the fixing glue with the highest melting point is firstly used for attaching the first fixing sheet, the fixing glue with the lowest melting point is used for attaching the last strain gauge, and the mode that each wall surface is attached independently is adopted. Therefore, when the fixing glue with low melting point is melted after heating, even the fixing glue which is stuck last is heated at the same time, and the melting can not occur because the heating temperature is not satisfied. Therefore, under the preparation method, the fixing adhesives with different melting points are adopted respectively, and the fixing adhesives are respectively and thermally fused one by one according to the heating sequence from high melting point to low melting point, so that the last one is not influenced when the strain gauges are adhered by the thermal fusion fixing adhesives, and the adhesion position of each strain gauge is well ensured to be kept accurate.
In some embodiments, the currently applied wall is placed horizontally up at least after the strain gauge is placed in the melted fixing glue. Specifically, after the fixing glue is melted, the fixing glue is in a flowable glue state, and when the strain gauge is placed in the glue, the strain gauge is sunk to a set position in the glue under the action of gravity. Therefore, at least after the strain gauge is placed in the glue, the wall surface attached to the front part needs to be kept horizontally upwards to ensure that the strain gauge can effectively sink under the action of gravity, and the fixed position can meet the design requirement to ensure the reliability of detection performance. The problem that the fixed position of the strain gauge is deviated and the performance of the product is affected due to the fact that the current wall surface is in a non-horizontal state is avoided. If the front wall faces downwards, the strain gauge floats upwards under the action of gravity and is far away from the wall surface, so that the detection performance is affected.
In some embodiments, the attachment of the strain gage to the carrier may be accomplished by heating the carrier to a temperature at which the currently selected fixing glue melts before the strain gage is attached to the carrier, and placing and melting the fixing glue on the wall of the desired patch. The method comprises the steps of firstly heating the wall surface to which the strain gauge is to be adhered, keeping the temperature reached by heating to be basically the same as the melting point temperature of the currently selected fixing adhesive (which can be slightly higher than the melting point temperature of the currently selected fixing adhesive), then placing the selected fixing adhesive on the corresponding wall surface, and adhering the fixing adhesive on the wall surface by heating and melting the fixing adhesive. At this time, the preparation of the melt adhesive before the application of the adhesive on the wall surface is completed.
In some embodiments, after the preparation of the molten adhesive is completed, the fixing adhesive is in a molten state, and the strain gauge is placed in the fixing adhesive after the current melting, and the wall surface to which the strain gauge is attached is kept horizontally and upwards, so that the strain gauge is immersed into the adhesive by gravity, and the strain gauge is fixed in the fixing adhesive after the fixing adhesive is cooled. Thus, the attachment of the strain gage on the current wall surface is completed.
According to the number of the required wall surfaces of the patches, the preparation method can be used for singly and separately operating the patches surface by surface to finish the patch operation on all the wall surfaces of the patches.
In another possible embodiment, after the fixing glue is adhered to the currently selected wall surface by hot melting, the currently melted fixing glue is cooled, so that the fixing glue is adhered to the currently selected wall surface in a solidified state, and the preset setting of the fixing glue on the currently selected wall surface is completed. And according to the number of the wall surfaces of the patch, fixing adhesives are selected according to the sequence from high melting point to low melting point, the preset of the fixing adhesives on the wall surfaces is finished surface by surface, and the types of the fixing adhesives adhered on the wall surfaces are different. That is, before the strain gauge is placed on the fixing adhesive, the fixing adhesive is preset on each wall surface. Furthermore, at least the kinds of fixing adhesives on different wall surfaces are different, so that the melting points can also be kept different.
In some embodiments, when a preparation mode of pre-setting fixing glue on each wall surface is selected, according to the number of the wall surfaces of the patch, the fixing glue is pre-set on each wall surface, then the fixing glue is respectively heated and melted according to the sequence of the melting point from high to low, and a strain gauge is placed in the fixing glue after the current melting, and the strain gauge is fixed after the fixing glue is cooled. In other words, each wall surface is provided with fixing glue in advance, when the fixing glue is attached, the fixing glue is heated to the temperature with the highest melting point in each fixing glue, then the strain gauge is placed into the fixing glue with the highest melting point, and after the fixing glue is cooled, the placed strain gauge can be fixed. Thus, the remaining strain gage was bonded by the operation in order of the melting point from high to low. It will be appreciated that in this mode of operation, when the high melting point fixing glue is heated, the low melting point fixing glue will melt, but the strain gauge is placed in the high melting point fixing glue first, so even if the low melting point fixing glue is melted, the problem of displacement of the strain gauge will not occur because the strain gauge is not placed in the low melting point fixing glue. According to the preparation method, the fixing glue is adhered on each wall surface in advance, so that the adhesion reliability of the fixing glue and the accuracy of the set position can be determined in advance, and the strain gauge is correspondingly placed, so that the position of the strain gauge can be kept accurate, and the quality of products can be improved. In addition, the fixing glue with low melting point is repeatedly melted, so that the dissipation of internal bubbles is facilitated, and the accuracy of enabling the strain gauge to sink to a set depth after the strain gauge is placed is improved.
In yet another possible embodiment, before the strain gauge is adhered to the carrier, the strain gauge is fixed in different kinds of fixing glue one by one according to the number of wall surfaces of the patch, the carrier is heated to the temperature at which the fixing glue selected at present can be melted, the fixing glue with the strain gauge fixed in advance is placed on the wall surface of the patch to be melted, and after the fixing glue is cooled, the adhesion of the strain gauge on the current wall surface is completed. The strain gauge is adhered to the wall surface of the patch to be adhered after the fixing adhesive is melted, and the strain gauge is adhered to the wall surface of the patch to be adhered after the fixing adhesive is cooled again. Under the preparation mode, the strain gauge can be fixed in different kinds of fixing adhesives in advance, and then the corresponding fixing adhesives are selected for hot melting adhesion according to the difference of melting points, so that the preparation convenience is good. In addition, the bearing piece can be heated to the temperature required by melting the fixing glue with the highest melting point, and in the subsequent cooling process, the corresponding fixing glue can be correspondingly placed according to the temperature change, so that the overall preparation efficiency is improved.
In some embodiments, the surface roughness is increased at least on the wall surface to be patched prior to the patching. In this way, by increasing the surface roughness of the wall surface to be attached, the adhesion force between the fixing adhesive and the wall surface can be improved when the fixing adhesive is applied to the fixing adhesive, and the attaching firmness of the strain gauge can be improved. The surface roughness increasing treatment may be to embed a part of the fixing paste in the pit by providing the pit. The wall surface may be provided with a large number of fine bumps or pits, and the adhesive force with the fixing adhesive can be increased.
For a better understanding of the implementation of the present invention, as shown in fig. 2, the cross section of the carrier is rectangular, and has opposite upper and lower walls and opposite left and right walls, and the steps of the preparation method are not illustrated, and the preparation method is not only applicable to carriers having rectangular cross sections, but also applicable to carriers having other shapes.
Specifically, strain gauges are respectively stuck on four wall surfaces of the bearing piece, so that four kinds of fixing glue with different melting points are adopted, and the fixing glue sequentially becomes a first fixing glue, a second fixing glue, a third fixing glue and a fourth fixing glue according to the sequence from the high melting point to the low melting point. The melting point of the first fixing glue can be 500-600 ℃, the melting point of the second fixing glue can be 400-500 ℃, the melting point of the third fixing glue can be 300-400 ℃, and the melting point of the fourth fixing glue can be 200-300 ℃. The preparation method comprises the following steps:
1) The first fixing glue with the highest melting point is adopted, the wall surface of the current patch to be attached is placed horizontally, the temperature is raised until the first fixing glue is melted, a strain gauge on the first fixing glue sinks due to self gravity, the melted first fixing glue sinks to a set depth, the temperature is lowered, and the first fixing glue is cooled and solidified, so that the attachment of the strain gauge on the wall surface is completed;
2) The second fixing glue with the second highest melting point is adopted, the wall surface of the current patch to be attached is placed horizontally, the temperature is raised until the second fixing glue is melted, a strain gauge on the second fixing glue sinks due to self gravity and sinks into the melted second fixing glue to a set depth, and at the moment, the strain gauge on the first fixing glue is not influenced because the melting point of the second fixing glue is lower than that of the first fixing glue;
3) The third fixing glue with the third highest melting point is adopted, the wall surface of the current patch to be attached is placed horizontally, the temperature is raised until the third fixing glue is melted, a strain gauge on the third fixing glue sinks due to self gravity and sinks into the melted third fixing glue to a set depth, and at the moment, the strain gauge on the first fixing glue and the second fixing glue is not influenced because the melting point of the third fixing glue is lower than that of the first fixing glue and the second fixing glue;
4) The fourth fixing glue with the lowest melting point is adopted, the wall surface of the current patch to be attached is horizontally placed, the temperature is raised until the fourth fixing glue is melted, the strain gauge on the fourth fixing glue can sink due to self gravity, and the fourth fixing glue which is melted is sunk to a set depth, at the moment, the melting point of the fourth fixing glue is lower than that of the first fixing glue, the second fixing glue and the third fixing glue, so that the strain gauge on the first fixing glue, the second fixing glue and the third fixing glue is not influenced.
Thus, according to the operation steps, the strain gage can be stuck on the bearing piece with four wall surfaces. It can be understood that when the strain gage is adhered to the bearing member with more wall surfaces, fixing adhesives with different melting points and operation steps are correspondingly added, and are not described in detail herein.
In the embodiment of the invention, the fixing glue with different melting points is adopted, and the corresponding fixing glue is independently and thermally melted according to the sequence from the melting point to the low, so that the influence on the last fixing glue in the hot melting process can be avoided, the positions of the strain gauges after being adhered cannot deviate, and the quality of products is improved.
As shown in fig. 2, the embodiment of the present invention further provides a strain gauge sensor 1, which is manufactured by the method for manufacturing a strain gauge sensor by hot melting according to any of the above embodiments. Specifically, the strain gauge sensor 1 includes a carrier 11, the carrier 11 having not less than two wall surfaces. If two walls are provided, the two walls may be opposite or adjacent to each other. At least one strain gauge 12 is adhered to each wall surface through a fixing adhesive 13, namely, one strain gauge 12 can be adhered to the same wall surface, or a plurality of strain gauges 12 can be adhered to the same wall surface, and the strain gauges 12 are detected together or are detected in a combined mode according to a design mode. In this way, the strain gauge 12 is attached to each of the different wall surfaces, so that the detection can be performed in multiple directions. The strain gauge sensor 1 is prepared by adopting the method, so that the adhered strain gauge 12 can be kept at an accurate position, and the detection performance is sensitive and high by combining the common detection in multiple directions, so that the strain gauge sensor 1 has better detection performance and accuracy of detection results, and the product quality is high.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (10)
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| CN202411921483.9A CN119374471B (en) | 2024-12-25 | 2024-12-25 | Method for manufacturing strain gauge sensor by hot melting and strain gauge sensor |
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| CN213180252U (en) * | 2020-11-07 | 2021-05-11 | 武义县曜禧电子科技有限公司 | Weighing sensor with improved strain gauge |
| CN118479415A (en) * | 2024-05-10 | 2024-08-13 | 维沃移动通信有限公司 | Manufacturing method of micro-electromechanical sensor, micro-electromechanical sensor and electronic equipment |
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| CN102221326A (en) * | 2010-04-13 | 2011-10-19 | 精量电子（深圳）有限公司 | Method for manufacturing strain gauge sensor by microfusion technology |
| CN213180252U (en) * | 2020-11-07 | 2021-05-11 | 武义县曜禧电子科技有限公司 | Weighing sensor with improved strain gauge |
| CN118479415A (en) * | 2024-05-10 | 2024-08-13 | 维沃移动通信有限公司 | Manufacturing method of micro-electromechanical sensor, micro-electromechanical sensor and electronic equipment |
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