CN113804339B - Force measuring device for measuring axial force of round rod - Google Patents
Force measuring device for measuring axial force of round rod Download PDFInfo
- Publication number
- CN113804339B CN113804339B CN202010549224.3A CN202010549224A CN113804339B CN 113804339 B CN113804339 B CN 113804339B CN 202010549224 A CN202010549224 A CN 202010549224A CN 113804339 B CN113804339 B CN 113804339B
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- round rod
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- 230000002093 peripheral effect Effects 0.000 claims abstract description 15
- 230000000149 penetrating effect Effects 0.000 claims abstract description 6
- 230000006835 compression Effects 0.000 claims description 15
- 238000007906 compression Methods 0.000 claims description 15
- 239000000463 material Substances 0.000 claims description 13
- 229910001069 Ti alloy Inorganic materials 0.000 claims description 4
- 230000035945 sensitivity Effects 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 3
- 238000013461 design Methods 0.000 claims description 2
- 230000005284 excitation Effects 0.000 claims description 2
- 238000005259 measurement Methods 0.000 abstract description 6
- 238000004140 cleaning Methods 0.000 abstract description 4
- 210000001503 joint Anatomy 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 4
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000005855 radiation Effects 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000007779 soft material Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/0028—Force sensors associated with force applying means
- G01L5/0038—Force sensors associated with force applying means applying a pushing force
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/20—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress
- G01L1/22—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress using resistance strain gauges
- G01L1/2206—Special supports with preselected places to mount the resistance strain gauges; Mounting of supports
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/20—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress
- G01L1/22—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress using resistance strain gauges
- G01L1/225—Measuring circuits therefor
- G01L1/2262—Measuring circuits therefor involving simple electrical bridges
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/20—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress
- G01L1/22—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress using resistance strain gauges
- G01L1/2287—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress using resistance strain gauges constructional details of the strain gauges
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
The invention provides a force measuring device for measuring axial force of a round rod, which comprises a support frame, a fixed block, a strain gauge and a signal cable, wherein the support frame is used for being detachably arranged on the outer peripheral side of the round rod, the fixed block is fixed with the support frame and is used for being in butt joint with the outer peripheral surface of the round rod, the signal cable is connected with the strain gauge, a through groove penetrating through the support frame along the axial direction of the round rod and sheet parts distributed on the inner side and the outer side of the through groove along the radial direction of the round rod are arranged on the support frame, and the strain gauge is fixed on each sheet part. In this application, when the round bar receives axial force, the round bar radially produces little deformation, and this deformation passes through the fixed block and gives the support frame, and then makes the thin slice portion take place corresponding change, can calculate the axial force of round bar through the resistance value change of the strainometer of fixing on thin slice portion. In particular, the strain gauge is fixedly arranged on the sheet part of the support frame, rather than being directly arranged on the outer peripheral surface of the round rod, so that the strain gauge can be reused, the loss is reduced, and cleaning is not needed after the force measurement is finished.
Description
Technical Field
The invention relates to the technical field of measuring axial force of a round rod, in particular to a force measuring device for measuring the axial force of the round rod.
Background
In the valve action engineering, the valve rod thrust collecting work is only the very important work of valve diagnosis, is an indispensable part of researching the valve reliability, and provides scientific judgment basis for the degradation analysis and the function margin evaluation of the valve.
At present, when each domestic power station is used for collecting the thrust of the valve rod, a method for sticking a strain gauge on the outer surface of the round rod of the valve rod is generally adopted. However, this method has several problems as follows:
1. the sticking precision error of the strain gauge is large, so that the data measurement precision is unstable;
2. the strain gauge is stuck on the outer surface of the valve rod, so that the one-time success rate is low, and the strain gauge is easy to consume;
3. the strain gauge cannot be reused and needs to be cleaned after being used, especially, the strain gauge is disposable under specific working conditions such as high temperature, radiation and the like, so that great waste is caused;
4. the valve rod can supply a small space for installing the variometer and is difficult to operate;
5. the dose of the personnel irradiated by the radiation is large;
6. the degree of deformation of the round bar caused by axial force is different for round bars of different materials, and the inductances of different strain gauges are different, so that different strain gauges are required to be installed for round bars of different materials.
Further, based on the problems of large error in the attaching precision of the strain gauge and low one-time success rate when attaching the strain gauge, chinese patent application publication No. CN109538590a discloses a jig for positioning and attaching a strain gauge on a round bar member, a cross line is drawn on the round bar member by the jig, and then the jig is taken down, and the strain gauge is attached according to the drawn cross line. However, the method of mounting strain gages using this jig still has several problems:
1) The strain gauge is directly stuck on the outer surface of the round rod member, so that the strain gauge mounting loss is easy to cause;
2) The strain gauge is still disposable and needs to be cleaned after use;
3) Different strain gauges are required to be installed on round rods made of different materials.
Disclosure of Invention
In view of the above-mentioned drawbacks of the prior art, it is an object of the present invention to provide a force measuring device for measuring axial forces of a round bar, in which the strain gauge can be reused.
In order to achieve the above purpose, the invention provides a force measuring device for measuring axial force of a round rod, which comprises a support frame, a fixed block, a strain gauge and a signal cable, wherein the support frame is used for being detachably arranged on the outer periphery side of the round rod, the fixed block is fixed with the support frame and is used for being in abutting fit with the outer periphery surface of the round rod, the signal cable is connected with the strain gauge, a through groove penetrating through the support frame along the axial direction of the round rod and sheet parts distributed on the inner side and the outer side of the through groove along the radial direction of the round rod are arranged on the support frame, and the strain gauge is fixed on each sheet part.
Further, a fixing section fixed with the fixing block is arranged on the supporting frame, and the sheet part is fixed with the fixing section.
Further, the force measuring device further comprises a compression block, the compression block and the fixed block are oppositely arranged along the radial direction of the round rod, a compression section connected with the compression block is arranged on the support frame, a fastening bolt is connected to the compression section in a threaded mode, the fastening bolt is in butt joint with the outer surface of the compression block, which faces away from the round rod, and the compression block is in butt joint with the outer peripheral surface of the round rod.
Further, a through hole is formed in the fixing section, one end of the through hole is communicated with the through groove, the other end of the through hole is communicated with the outside of the supporting frame, and the signal cable is arranged in the through hole in a penetrating mode.
Further, the outer circumferences of the sheet portion and the through groove, and the outer circumference of the fixing section are provided with sealing layers.
Further, the support frame is made of titanium alloy.
Further, a plurality of hollowed-out parts are formed on the support frame.
Further, the strain gauge is adhered and fixed to the sheet portion.
As described above, the force measuring device for measuring the axial force of the round rod according to the present invention has the following advantages:
in this application, when the round bar receives axial force, the round bar radially produces little deformation, and this deformation passes through the fixed block and gives the support frame, and then makes the thin slice portion take place corresponding change, can calculate the axial force of round bar through the resistance value change of the strainometer of fixing on thin slice portion. In particular, the strain gauge is fixedly arranged on the sheet part of the support frame, rather than being directly arranged on the outer peripheral surface of the round rod, so that the strain gauge can be reused, the loss is reduced, and cleaning is not needed after the force measurement is finished.
Drawings
Fig. 1 is a schematic structural diagram of a force measuring device according to the present application.
Fig. 2 is a schematic structural view of the support frame in fig. 1.
Description of element reference numerals
10. Round bar
20. Supporting frame
21. Fixing section
211. Through hole
212. Mounting groove
22. Strain gauge mounting section
221. Through groove
222. Sheet part
23. Frame body section
231. Hollowed-out part
24. Compacting section
30. Fixed block
40. Strain gauge
50. Signal cable
60. Compression block
70. Fastening bolt
Detailed Description
Further advantages and effects of the present invention will become apparent to those skilled in the art from the disclosure of the present invention, which is described by the following specific examples.
It should be understood that the structures, proportions, sizes, etc. shown in the drawings are for illustration purposes only and should not be construed as limiting the invention to the extent that it can be practiced, since modifications, changes in the proportions, or adjustments of the sizes, which are otherwise, used in the practice of the invention, are included in the spirit and scope of the invention which is otherwise, without departing from the spirit or scope thereof. Also, the terms such as "upper," "lower," "left," "right," "middle," and "a" and the like are used herein for descriptive purposes only and not for purposes of limitation, and are intended to limit the scope of the invention as defined by the claims and the relative terms thereof as construed as corresponding to the claims.
As shown in fig. 1 and 2, the present application provides a force measuring device for measuring axial force of a round rod, the force measuring device includes a support frame 20 detachably mounted on an outer peripheral side of the round rod 10, a fixing block 30 fixed to the support frame 20 and adapted to be in abutting engagement with an outer peripheral surface of the round rod 10, a strain gauge 40, and a signal cable 50 connected to the strain gauge 40, a through slot 221 penetrating the support frame 20 along an axial direction of the round rod 10 is provided on the support frame 20, and sheet portions 222 radially distributed on both inner and outer sides of the through slot 221 along the round rod 10 are provided on the support frame 20, two sheet portions 222 are provided, and each sheet portion 222 is fixed with the strain gauge 40.
In use, the force measuring device is first mounted on the outer peripheral side of the round bar 10, and then the inner surface of the fixing block 30 in the force measuring device is in contact with the outer peripheral surface of the round bar 10. When the round rod 10 receives an axial force, the round rod 10 generates a small deformation in the radial direction, the deformation is transmitted to the support frame 20 through the fixing block 30, the sheet part 222 provided with the strain gauge 40 is correspondingly changed, the inner sheet part 222 close to the round rod 10 and the outer sheet part 222 far away from the round rod 10 are stretched and compressed in opposite directions, the strain gauge 40 fixed on the sheet part 222 generates a certain resistance value change, and the axial force of the round rod 10 can be calculated according to a voltage signal output by the strain gauge 40, so that the measurement of the axial force of the round rod is realized. In particular, the strain gauge 40 is fixedly mounted on the thin sheet portion 222 of the support frame 20, instead of being directly mounted on the outer peripheral surface of the round bar 10, and the force measuring device can be detachably mounted on the outer periphery of the round bar 10, so that the strain gauge 40 can be reused, loss is reduced, and cleaning is not required after the force measurement is finished.
Preferably, the strain gauge 40 is an electrical resistance strain gauge 40, the strain gauge 40 is adhered and fixed to the thin sheet portion 222, and the strain gauge 40 can be connected by using a wheatstone full bridge/half bridge method.
Further, as shown in fig. 1 and 2, the support 20 is C-shaped, or the support 20 is a semi-circular structural member for mounting the strain gauge 40 and the signal cable 50. The force measuring device further comprises a pressing block 60, the pressing block 60 and the fixing block 30 are oppositely arranged along the radial direction of the round rod 10, and the force measuring device is integrally arranged on the periphery of the round rod 10 through the fixing block 30 and the pressing block 60. Specifically, the support frame 20 includes, from beginning to end, a fixing section 21, a strain gauge mounting section 22, a frame main body section 23, and a pressing section 24, where the fixing section 21 and the pressing section 24 are respectively disposed at two ends of the support frame 20 with a C-shaped structure, and the fixing block 30 is fixed on the inner periphery of the fixing section 21 on the support frame 20, and the fixing manner between the fixing block and the fixing block may be screw fixing; the compression section 24 is in threaded connection with a fastening bolt 70, so that a threaded hole in threaded fit with the fastening bolt 70 is formed in the compression section 24, the fastening bolt 70 is in abutting fit with the outer surface of the compression block 60 facing away from the round rod 10, and the compression block 60 is in abutting fit with the outer circumferential surface of the round rod 10. When the force measuring device is mounted, the fixed block 30 is abutted against the outer periphery of the round bar 10, the fastening bolt 70 is screwed down, the inner end of the fastening bolt 70 is abutted against the outer surface of the pressing block 60, the pressing block 60 is abutted against the outer periphery of the round bar 10, and the force measuring device is integrally mounted on the outer periphery of the round bar 10 through the opposite clamping of the fixed block 30 and the pressing block 60. When the force measuring device is disassembled, the fastening bolt 70 is unscrewed, and the whole force measuring device can be taken away from the peripheral side of the round rod 10, so that the force measuring device and the round rod 10 can be detachably connected, and the force measuring device is convenient for a worker to operate. Preferably, the inner surfaces of the fixing block 30 and the compressing block 60 facing the round rod 10 are arc matching surfaces, and the arc matching surfaces are matched with the outer peripheral surface of the round rod 10 in a surface contact manner, so that the contact area between the fixing block 30 and the round rod 10 can be increased, the force measuring device is ensured to be stably and reliably installed, and the radial deformation of the round rod 10 caused by the axial force can be accurately transmitted to the supporting frame 20.
Further, as shown in fig. 2, the strain gauge mounting section 22 in the support frame 20 is hollow along the axial direction of the round bar 10, that is, the strain gauge mounting section 22 is penetrated by the through groove 221 along the axial direction of the round bar 10, and the thin sheet portion 222 and the through groove 221 constitute the strain gauge mounting section 22. The thickness of the thin sheet portion 222 in the radial direction of the round bar 10 is very small and is 0.3 to 0.7mm. Thus, the sheet portion 222 has one end connected to the fixed section 21 and the other end connected to the frame main body section 23. The fixing section 21 connected with the sheet part 222 is provided with a through hole 211 and a mounting groove 212, one end of the through hole 211 is communicated with the through groove 221, the other end of the through hole 211 is communicated with the outside of the support frame 20, the mounting groove 212 is communicated with the through hole 211, one end of the mounting groove extends to the surface of the fixing section 21 along the axial direction of the round rod 10, the signal cable 50 is arranged in the through hole 211 in a penetrating mode, and the design of the mounting groove 212 is convenient for mounting and leading out the signal cable 50 in a narrow space. After the strain gauge 40 and the signal cable 50 are mounted, the outer circumferences of the strain gauge mounting section 22 and the fixed section 21 are covered with a soft material, and the strain gauge 40 and the signal cable 50 are sealed and protected, whereby a sealing layer is formed on the outer circumferences of the thin piece portion 222 and the through groove 221, and the outer circumference of the fixed section 21.
Further, the material of the support frame 20 is titanium alloy, the titanium alloy has the characteristic of light weight, and meanwhile, the sensitivity of the induction force is very high, so that the strain gauge 40 can be suitable for round rods 10 with different materials, different strain gauges 40 do not need to be replaced according to the material of the round rods 10, and the problem of material adaptation of the strain gauge 40 and the round rods 10 is effectively solved. In addition, as shown in fig. 2, the frame main section 23 of the support frame 20 is provided with a plurality of hollowed-out parts 231, and the hollowed-out parts 231 are in a hole structure, so that the self weight of the support frame 20 is reduced, the transmission of the self weight of the support frame 20 to the radial deformation of the round rod 10 is avoided, and the measurement accuracy of the axial force of the round rod is improved.
Further, the measuring device for measuring the axial force of the round rod comprises the following steps.
Step one, mounting a force measuring device. The strain gauge 40 is stuck on the thin sheet portion 222 in the support frame 20, and the signal cable 50 is led out from the through hole 211 of the fixed section 21 in the support frame 20, and the strain gauge 40 and the signal cable 50 are sealed with a flexible material. The fixing block 30 is mounted on the inner circumference of the fixing section 21 in the support frame 20. The compression block 60 is mounted in the support frame 20 at the inner circumference of the compression section 24 using the fastening bolt 70. The fastening bolt 70 is slowly rotated, and the round bar 10 is clamped by the fixing block 30 and the pressing block 60 in opposition, so that the force measuring device is integrally mounted on the round bar 10.
And step two, measuring the force of the signals. The strain gauge 40 in the force measuring device is connected with the acquisition system through a signal, and when the round bar 10 is not subjected to axial force, namely, when the axial force applied to the round bar 10 is zero, the signal zeroing processing is carried out on the strain gauge 40. When the round bar 10 receives an axial force, the round bar 10 deforms radially, and the radial deformation is transmitted to the support frame 20 through the fixing block 30, so that the thin sheet portion 222 on which the strain gauge 40 is mounted changes accordingly. The inner sheet portion 222 close to the round bar 10 and the outer sheet portion 222 far from the round bar 10 are stretched and compressed in opposite directions, and the strain gauge 40 fixed to the sheet portion 222 is changed in resistance value to some extent, and the bridge is unbalanced, so that the strain gauge 40 outputs a voltage signal. The acquisition system collects the voltage signal output by the strain gauge 40 for use as a calculation of the axial force.
And thirdly, calculating the axial force. The axial force applied to the round bar 10 is calculated from the voltage signal output from the resistance change of the strain gauge 40 in combination with the geometric and material properties of the round bar 10. In this embodiment, the calculation formula of the axial force of the round rod is:
in the above formula, F is the axial force applied to the round bar 10; d is the diameter of the round rod 10; δD is the radial deformation of the round bar 10; e is Young's modulus of the round bar 10 material; gamma is poisson's ratio; u is the output voltage of the strain gauge 40; u is excitation voltage; ω is the sensitivity coefficient of the support 20. The sensitivity coefficient ω of the support 20 can be calibrated at the metrology yard by a standard pressure tester and a standard round bar 10.
In summary, the force measuring device according to the present application has the following advantages:
1. the whole circumference of the round bar 10 is detachably installed, and the strain gauge 40 is built in, so that the strain gauge 40 can be reused, and the loss of the strain gauge 40 is greatly reduced.
2. The strain gauge 40 is not limited to the material of the round bar 10, and can be applied to round bars 10 of various materials.
3. The application range is wide, and the size of the round bar 10 is not limited.
4. The detachable connection with the round bar 10 is convenient to operate, can be assembled and disassembled immediately, saves time, and has no problems of subsequent cleaning and the like.
5. The strain gauge 40 is not in direct contact with the round bar 10 and can be used in various temperature environments.
Therefore, the invention effectively overcomes various defects in the prior art and has high industrial utilization value.
The above embodiments are merely illustrative of the principles of the present invention and its effectiveness, and are not intended to limit the invention. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the invention. Accordingly, it is intended that all equivalent modifications and variations of the invention be covered by the claims, which are within the ordinary skill of the art, be within the spirit and scope of the present disclosure.
Claims (4)
1. A force measuring device for measuring axial force of a round rod, which is characterized in that: the device comprises a support frame (20) which is detachably arranged on the outer peripheral side of a round rod (10), a fixed block (30) which is fixed with the support frame (20) and is in butt fit with the outer peripheral surface of the round rod (10), a strain gauge (40), a signal cable (50) which is connected with the strain gauge (40) and a compression block (60), wherein the support frame (20) is provided with a through groove (221) which axially penetrates the support frame (20) along the round rod (10) and thin sheet parts (222) which are radially distributed on the inner side and the outer side of the through groove (221) along the round rod (10), and each thin sheet part (222) is fixedly provided with the strain gauge (40);
the support frame (20) is C-shaped, the support frame (20) comprises a fixing section (21), a strain gauge mounting section (22), a frame main body section (23) and a pressing section (24) which are sequentially connected from beginning to end, the fixing section (21) and the pressing section (24) are respectively arranged at two ends of the support frame (20) with a C-shaped structure, the fixing block (30) is fixed on the inner periphery of the fixing section (21) on the support frame (20), one end of the thin sheet part (222) is fixed with the fixing section (21), the pressing block (60) is connected with the pressing section (24), the pressing block (60) and the fixing block (30) are oppositely arranged along the radial direction of the round rod (10), a fastening bolt (70) is connected in a threaded manner in the pressing section (24), the fastening bolt (70) is in butt fit with the outer surface of the pressing block (60) back to the round rod (10), and the pressing block (60) is in butt fit with the outer peripheral surface of the round rod (10). The strain gauge mounting section (22) is of a hollow design which is hollow along the axial direction of the round rod (10), the strain gauge mounting section (22) is penetrated by the through groove (221) along the axial direction of the round rod (10), and the sheet part (222) and the through groove (221) form the strain gauge mounting section (22);
the support frame (20) is made of titanium alloy, and a plurality of hollowed-out parts (231) are formed in the support frame (20);
when the round rod (10) receives axial force, the round rod (10) generates tiny deformation in the radial direction, the deformation is transmitted to the supporting frame (20) through the fixing block (30), so that the inner sheet part (222) close to the round rod (10) and the outer sheet part (222) far away from the round rod (10) can be stretched and compressed in opposite directions, further, the resistance value of the strain gauge (40) fixed on the sheet part (222) is changed, and according to a voltage signal output by the resistance change of the strain gauge (40), the obtained axial force of the round rod (10) is as follows:
in the formula, F is the axial force applied to the round rod (10); d is the diameter of the round rod (10); δD is the radial deformation of the round rod (10); e is Young's modulus of the round rod (10) material; gamma is poisson's ratio; u is the output voltage of the strain gauge (40);
u is excitation voltage; omega is the sensitivity coefficient of the support (20).
2. Force measuring device according to claim 1, characterized in that: the fixing section (21) is provided with a through hole (211), one end of the through hole (211) is communicated with the through groove (221), the other end of the through hole is communicated with the outside of the support frame (20), and the signal cable (50) is arranged in the through hole (211) in a penetrating mode.
3. Force measuring device according to claim 2, characterized in that: the outer circumferences of the sheet part (222) and the through groove (221) and the outer circumference of the fixing section (21) are provided with sealing layers.
4. Force measuring device according to claim 1, characterized in that: the support frame (20) is provided with a plurality of hollowed-out parts (231).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010549224.3A CN113804339B (en) | 2020-06-16 | 2020-06-16 | Force measuring device for measuring axial force of round rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010549224.3A CN113804339B (en) | 2020-06-16 | 2020-06-16 | Force measuring device for measuring axial force of round rod |
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| Publication Number | Publication Date |
|---|---|
| CN113804339A CN113804339A (en) | 2021-12-17 |
| CN113804339B true CN113804339B (en) | 2023-12-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010549224.3A Active CN113804339B (en) | 2020-06-16 | 2020-06-16 | Force measuring device for measuring axial force of round rod |
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2020
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| JP2013234899A (en) * | 2012-05-08 | 2013-11-21 | Nuclear Engineering Ltd | Strain gauge holder |
| CN107843187A (en) * | 2017-12-18 | 2018-03-27 | 武汉理工大学 | Adaptive transversely deforming measurement apparatus and measuring method |
| CN108072466A (en) * | 2017-12-25 | 2018-05-25 | 江苏神通阀门股份有限公司 | A kind of anti-torque thrust detection probe |
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| CN109974912A (en) * | 2017-12-27 | 2019-07-05 | 核动力运行研究所 | A kind of clamp-type thrust pickup |
| CN109323786A (en) * | 2018-11-08 | 2019-02-12 | 李玉青 | A kind of resistance strain weighing transducer |
| CN109538590A (en) * | 2018-11-29 | 2019-03-29 | 重庆长安汽车股份有限公司 | The fixture of foil gauge is pasted in a kind of positioning on round bar component |
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