CN112014010A - Novel strain type pressure two-dimensional force sensor - Google Patents
Novel strain type pressure two-dimensional force sensor Download PDFInfo
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- CN112014010A CN112014010A CN202010974253.4A CN202010974253A CN112014010A CN 112014010 A CN112014010 A CN 112014010A CN 202010974253 A CN202010974253 A CN 202010974253A CN 112014010 A CN112014010 A CN 112014010A
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- strain gauge
- resistance strain
- elastic element
- coupled
- force sensor
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- 238000009530 blood pressure measurement Methods 0.000 claims abstract description 15
- 238000013461 design Methods 0.000 abstract description 4
- 238000009434 installation Methods 0.000 abstract description 4
- 230000003068 static effect Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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Classifications
-
- 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
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/16—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring several components of force
- G01L5/161—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring several components of force using variations in ohmic resistance
- G01L5/1627—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring several components of force using variations in ohmic resistance of strain gauges
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
The invention relates to the technical field of sensors, and discloses a novel strain type pressure two-dimensional force sensor which comprises an elastic element, wherein the elastic element is of a T-shaped beam structure and comprises a longitudinal beam extending longitudinally and a transverse beam extending horizontally, a first through groove extending transversely is formed in the side surface of the longitudinal beam, and a second through groove extending longitudinally is formed in the side surface of the transverse beam; the resistive strain gauge R1, the resistive strain gauge R2, the resistive strain gauge R3, and the resistive strain gauge R4 are bonded to the side member, and the resistive strain gauge R1, the resistive strain gauge R2, the resistive strain gauge R3, and the resistive strain gauge R4 form a lateral pressure measurement wheatstone bridge. According to the novel strain type pressure two-dimensional force sensor, the structural design of a T-shaped beam is adopted, the eccentric load resistance and the lateral load resistance are high, and the dynamic and static application performances can be improved; meanwhile, the structure is simple and compact, the installation and the disassembly are convenient, and the installation space is saved.
Description
Technical Field
The invention relates to the technical field of sensors, in particular to a novel strain type pressure two-dimensional force sensor.
Background
Under the rapid development of the industrial automation trend, nowadays, more and more products rely on different pressure senses generated on product parts to improve the use experience of users on the products, such as pressure-sensing pens, game mouse wheels and the like. However, these products often have some problems in the assembly process, for example, when using the game mouse wheel, the two directions of force applied to the wheel, that is, the longitudinal pressure and the transverse rolling pressure of the wheel, need to be detected to ensure that the user can have a good hand feeling when using the mouse. Therefore, it is desirable to provide a sensor capable of precisely controlling the output of pressure in two directions to solve the above problems, so as to improve the production efficiency, the product quality, and the product user experience.
Disclosure of Invention
The invention aims to provide a novel strain type pressure two-dimensional force sensor, and aims to solve the problem that a sensor capable of measuring pressure from two different directions in real time is lacked in the prior art.
The invention is realized in such a way, and provides a novel strain type pressure two-dimensional force sensor, which comprises an elastic element, wherein the elastic element is of a T-shaped beam structure, the elastic element comprises a longitudinal beam extending longitudinally and a transverse beam extending horizontally, a first through groove extending transversely is formed in the side surface of the longitudinal beam, and a second through groove extending longitudinally is formed in the side surface of the transverse beam; a resistance strain gauge R1, a resistance strain gauge R2, a resistance strain gauge R3 and a resistance strain gauge R4 are adhered to the longitudinal beam, and a transverse pressure measurement Wheatstone bridge is formed by the resistance strain gauge R1, the resistance strain gauge R2, the resistance strain gauge R3 and the resistance strain gauge R4; the beam is bonded with a resistance strain gauge R5, a resistance strain gauge R6, a resistance strain gauge R7 and a resistance strain gauge R8, and the resistance strain gauge R5, the resistance strain gauge R6, the resistance strain gauge R7 and the resistance strain gauge R8 form a longitudinal pressure measurement wheatstone bridge.
Furthermore, the top of the longitudinal beam is fixedly connected with the middle of the cross beam to form the T-shaped beam structure.
Further, a first end of the R1 is coupled to a positive power supply, a first end of the R4 is coupled to a second end of the R1, a second end of the R4 is coupled to a negative power supply, a first end of the R2 is coupled to a first end of the R1, a first end of the R3 is coupled to a second end of the R2, and a second end of the R3 is coupled to a negative power supply.
Further, a first end of the R5 is coupled to a positive power supply, a first end of the R8 is coupled to a second end of the R5, a second end of the R8 is coupled to a negative power supply, a first end of the R6 is coupled to a first end of the R5, a first end of the R7 is coupled to a second end of the R6, and a second end of the R7 is coupled to a negative power supply.
Further, the periphery of the elastic element is sleeved with a shell for protecting the elastic element, and a gap is formed between the shell and the elastic element.
Furthermore, a plurality of first threaded holes are formed in the side face of the elastic element, the first threaded holes are matched and fixed with the shell through screws, O-shaped gaskets are sleeved on the screws, and the O-shaped gaskets are used for separating the shell from the elastic element and are located between the shell and the elastic element.
Furthermore, the O-shaped gasket is made of rubber.
Further, a plurality of the first threaded holes are provided on a side surface of the cross member, and/or a plurality of the first threaded holes are arranged symmetrically with respect to a central axis of the elastic member.
Further, the second through groove is symmetrical about a central axis of the elastic member.
Further, the upper surface of the cross beam is provided with a plurality of second threaded holes for installing and fixing the sensor to a specified position.
Compared with the prior art, the invention mainly has the following beneficial effects:
according to the novel strain type pressure two-dimensional force sensor, due to the fact that the pressure measurement adopts the structural design of the T-shaped beam, eccentric load resistance and lateral load resistance are high, and dynamic and static application performances can be improved. Meanwhile, the pressure-sensitive pen and the game mouse are simple and compact in structure, convenient to install and disassemble, installation space is saved, and real-time measurement and control of products such as the pressure-sensitive pen and the game mouse roller on force values in different directions can be met, so that production efficiency is improved, the reject ratio of the products is reduced, and user experience is optimized.
Drawings
Fig. 1 is a schematic structural diagram of a novel strain-type pressure two-dimensional force sensor provided by an embodiment of the invention;
fig. 2 is an exploded schematic view of a novel strain gauge pressure two-dimensional force sensor according to an embodiment of the present invention;
FIG. 3 is a circuit diagram of a pressure measurement Wheatstone bridge provided by an embodiment of the invention.
Reference numerals: 1-elastic element, 2-shell, 3-screw, 4- "O" type gasket, 5-lead, 11-longitudinal beam, 12-cross beam, 13-first threaded hole, 14-second threaded hole, 111-first through groove and 121-second through groove.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The same or similar reference numerals in the drawings of the present embodiment correspond to the same or similar components; in the description of the present invention, it should be understood that if there is an orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", etc. based on the orientation or positional relationship shown in the drawings, it is only for convenience of describing the present invention and simplifying the description, but it is not intended to indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and are not to be construed as limiting the present patent, and the specific meaning of the terms may be understood by those skilled in the art according to specific circumstances.
The following describes the implementation of the present invention in detail with reference to specific embodiments.
Referring to fig. 1, fig. 1 shows a schematic structural diagram of a novel strain-type pressure two-dimensional force sensor provided by the present invention, and referring to fig. 2, the novel strain-type pressure two-dimensional force sensor provided by the present embodiment includes an elastic element 1, the elastic element 1 is a "T" beam structure, the elastic element 1 includes a longitudinal beam 11 extending longitudinally and a horizontal beam 12 extending horizontally, a first through groove 111 extending transversely is provided on a side surface of the longitudinal beam 11, and a second through groove 121 extending longitudinally is provided on a side surface of the horizontal beam 12; a resistance strain gauge R1, a resistance strain gauge R2, a resistance strain gauge R3, and a resistance strain gauge R4 are bonded to the side member 11, and the resistance strain gauge R1, the resistance strain gauge R2, the resistance strain gauge R3, and the resistance strain gauge R4 form a transverse pressure measurement wheatstone bridge; the beam 12 is bonded with the resistance strain gauge R5, the resistance strain gauge R6, the resistance strain gauge R7, and the resistance strain gauge R8, and the resistance strain gauge R5, the resistance strain gauge R6, the resistance strain gauge R7, and the resistance strain gauge R8 form a longitudinal pressure measurement wheatstone bridge.
According to the novel strain type pressure two-dimensional force sensor, the resistance strain gauge R1, the resistance strain gauge R2, the resistance strain gauge R3 and the resistance strain gauge R4 are attached to the longitudinal beam 11, when the elastic element 1 is subjected to transverse pressure, the longitudinal beam 11 can deform along the transverse direction, so that the resistance of the resistance strain gauge on the longitudinal beam 11 changes, and then the pressure value is measured through a transverse pressure measurement Wheatstone bridge; the resistance strain gauge R5, the resistance strain gauge R6, the resistance strain gauge R7 and the resistance strain gauge R8 are attached to the beam 12, when the elastic element 1 is subjected to longitudinal pressure, the beam 12 can deform along the longitudinal direction, so that the resistance of the resistance strain gauge on the beam 12 changes, and then the pressure value is measured through a longitudinal pressure measurement Wheatstone bridge, so that the longitudinal pressure and the transverse pressure are measured in real time; the elastic element 1 adopts the structural design of a T-shaped beam, has simple and compact structure and is convenient to mount and dismount; meanwhile, the pressure measurement has high precision and good reliability.
According to the novel strain type pressure two-dimensional force sensor provided by the invention, as the pressure measurement adopts the structural design of a T-shaped beam, the eccentric load resistance and the lateral load resistance are strong, and the dynamic and static application performances can be improved. Meanwhile, the pressure-sensitive pen and the game mouse are simple and compact in structure, convenient to install and disassemble, installation space is saved, and real-time measurement and control of products such as the pressure-sensitive pen and the game mouse roller on force values in different directions can be met, so that production efficiency is improved, the reject ratio of the products is reduced, and user experience is optimized.
Preferably, the electric resistance strain gauge R1, the electric resistance strain gauge R2, the electric resistance strain gauge R3, and the electric resistance strain gauge R4 are attached to the side surface of the side member 11.
Preferably, the electric resistance strain gauge R5, the electric resistance strain gauge R6, the electric resistance strain gauge R7, and the electric resistance strain gauge R8 are attached to the lower surface of the beam 12.
Referring to fig. 2, the top of the longitudinal beam 11 is fixedly connected with the middle of the transverse beam 12 to form a T-shaped beam structure. This results in less weight being carried by the longitudinal beams 11, greater stability of the entire structure and greater load-bearing capacity.
Referring to fig. 3, a first end of the R1 is coupled to a positive power supply, a first end of the R4 is coupled to a second end of the R1, a second end of the R4 is coupled to a negative power supply, a first end of the R2 is coupled to a first end of the R1, a first end of the R3 is coupled to a second end of the R2, and a second end of the R3 is coupled to a negative power supply. When lateral pressure is applied to the longitudinal beam 11, the resistances of the resistance strain gauge R1 and the resistance strain gauge R3 increase, the resistances of the resistance strain gauge R2 and the resistance strain gauge R4 decrease, and if the bridge is powered by U at this time, a voltage U0 is output, so that the lateral pressure is converted into a measurable voltage signal, and the lateral pressure value is measured.
Similarly, a first end of the R5 is coupled to the positive terminal of the power supply, a first end of the R8 is coupled to the second end of the R5, a second end of the R8 is coupled to the negative terminal of the power supply, a first end of the R6 is coupled to the first end of the R5, a first end of the R7 is coupled to the second end of the R6, and a second end of the R7 is coupled to the negative terminal of the power supply. When the beam 12 is subjected to longitudinal pressure, the resistances of R6 and R7 are increased, the resistances of R5 and R8 are reduced, and if the electric bridge supplies power to U3, the voltage U4 is output, so that the pressure is converted into a measurable voltage signal, and the measurement of the pressure value is realized.
Specifically, the transverse pressure measurement wheatstone bridge and the longitudinal pressure measurement wheatstone bridge are connected to an external circuit through the wire 5.
As an embodiment of the present invention, referring to fig. 1 and fig. 2, an outer casing 2 for protecting the elastic element 1 is sleeved on an outer periphery of the elastic element 1, and a gap is formed between the outer casing 2 and the elastic element 1. Need gapped between shell 2 and the elastic element 1, like this, when elastic element 1 takes place deformation, can not influence the degree that elastic element 1 warp because of blockking of shell 2 to cause the error when the pressure value detects.
Specifically, a plurality of first threaded holes 13 are formed in the side surface of the elastic element 1, the first threaded holes 13 are matched and fixed with the shell 2 through screws 3, an "O" -shaped gasket 4 is sleeved on each screw 3, and the "O" -shaped gasket 4 is used for separating the shell 2 from the elastic element 1 and is located between the shell 2 and the elastic element 1. The screw 3 is matched and fixed with the first threaded hole 13, so that the shell 2 is convenient to mount and fix.
Wherein a plurality of first threaded holes 13 are provided on the side of the cross beam 12 and/or a plurality of first threaded holes 13 are arranged symmetrically with respect to the central axis of the spring element 1. This enables a more stable fixation of the housing 2 and also minimizes the influence of the housing 2 on the deformation of the elastic element 1.
Preferably, the "O" shaped washer 4 is made of rubber. The rubber "O" ring 4 has elasticity, and can reduce the influence on the deformation of the elastic element 1 to the maximum.
In particular, the second through slots 121 are symmetrical with respect to the central axis of the elastic element 1; such an arrangement ensures smooth pressure transfer.
In one embodiment of the present invention, the beam 12 is provided with a plurality of second screw holes 14 on the upper surface thereof for fixing the sensor to a predetermined position. Therefore, in the deformation process of the elastic element 1, the upper surface of the cross beam 12 is connected with the specified position through the bolt, and the influence on the elastic element 1 can be reduced as much as possible.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A novel strain type pressure two-dimensional force sensor is characterized by comprising an elastic element, wherein the elastic element is of a T-shaped beam structure and comprises a longitudinal beam extending longitudinally and a horizontal beam extending horizontally, a first through groove extending transversely is formed in the side surface of the longitudinal beam, and a second through groove extending longitudinally is formed in the side surface of the horizontal beam; a resistance strain gauge R1, a resistance strain gauge R2, a resistance strain gauge R3 and a resistance strain gauge R4 are adhered to the longitudinal beam, and a transverse pressure measurement Wheatstone bridge is formed by the resistance strain gauge R1, the resistance strain gauge R2, the resistance strain gauge R3 and the resistance strain gauge R4; the beam is bonded with a resistance strain gauge R5, a resistance strain gauge R6, a resistance strain gauge R7 and a resistance strain gauge R8, and the resistance strain gauge R5, the resistance strain gauge R6, the resistance strain gauge R7 and the resistance strain gauge R8 form a longitudinal pressure measurement wheatstone bridge.
2. The novel strain type pressure two-dimensional force sensor as claimed in claim 1, wherein the top of the longitudinal beam is fixedly connected with the middle of the transverse beam to form the T-shaped beam structure.
3. The novel strain-type pressure two-dimensional force sensor as claimed in claim 1, wherein a first end of the R1 is coupled to a positive power supply, a first end of the R4 is coupled to a second end of the R1, a second end of the R4 is coupled to a negative power supply, a first end of the R2 is coupled to a first end of the R1, a first end of the R3 is coupled to a second end of the R2, and a second end of the R3 is coupled to a negative power supply.
4. The novel strain-type pressure two-dimensional force sensor as claimed in claim 1, wherein a first end of the R5 is coupled to a positive power supply, a first end of the R8 is coupled to a second end of the R5, a second end of the R8 is coupled to a negative power supply, a first end of the R6 is coupled to a first end of the R5, a first end of the R7 is coupled to a second end of the R6, and a second end of the R7 is coupled to a negative power supply.
5. The novel strain type pressure two-dimensional force sensor as claimed in any one of claims 1-4, wherein the elastic element is sleeved with a shell for protecting the elastic element, and a gap is formed between the shell and the elastic element.
6. The novel strain type pressure two-dimensional force sensor as claimed in claim 5, wherein a plurality of first threaded holes are provided on the side surface of the elastic element, the first threaded holes are fixed with the housing by screws in a matching manner, an "O" type gasket is sleeved on the screws, and the "O" type gasket is used for separating the housing from the elastic element and is located between the housing and the elastic element.
7. The novel strain gauge pressure two-dimensional force sensor according to claim 6, wherein the O-shaped gasket is made of rubber.
8. The novel strain gauge pressure two-dimensional force sensor according to claim 6, wherein a plurality of the first threaded holes are provided on a side surface of the cross beam, and/or a plurality of the first threaded holes are symmetrically arranged about a central axis of the elastic element.
9. The novel strain gauge pressure two-dimensional force sensor according to any of claims 1-4, wherein the second through groove is symmetrical about the central axis of the elastic element.
10. The novel strain gauge pressure two-dimensional force sensor as claimed in any one of claims 1-4, wherein the beam upper surface is provided with a plurality of second threaded holes for mounting and fixing the sensor to a specified position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010974253.4A CN112014010A (en) | 2020-09-16 | 2020-09-16 | Novel strain type pressure two-dimensional force sensor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010974253.4A CN112014010A (en) | 2020-09-16 | 2020-09-16 | Novel strain type pressure two-dimensional force sensor |
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| CN112014010A true CN112014010A (en) | 2020-12-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010974253.4A Pending CN112014010A (en) | 2020-09-16 | 2020-09-16 | Novel strain type pressure two-dimensional force sensor |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202814606U (en) * | 2012-08-16 | 2013-03-20 | 锐马（福建）电气制造有限公司 | Two-dimension force cell sensor |
| CN110553769A (en) * | 2019-09-26 | 2019-12-10 | 深圳市鑫精诚科技有限公司 | Novel strain type pressure-torsion two-dimensional force sensor |
| CN110553781A (en) * | 2019-09-26 | 2019-12-10 | 深圳市鑫精诚科技有限公司 | Novel strain type six-axis force sensor |
| CN210243052U (en) * | 2019-08-30 | 2020-04-03 | 安徽中科米点传感器有限公司 | Integrated square structure two-component force sensor |
| CN212585882U (en) * | 2020-09-16 | 2021-02-23 | 深圳市鑫精诚科技有限公司 | Novel strain type pressure two-dimensional force sensor |
-
2020
- 2020-09-16 CN CN202010974253.4A patent/CN112014010A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202814606U (en) * | 2012-08-16 | 2013-03-20 | 锐马（福建）电气制造有限公司 | Two-dimension force cell sensor |
| CN210243052U (en) * | 2019-08-30 | 2020-04-03 | 安徽中科米点传感器有限公司 | Integrated square structure two-component force sensor |
| CN110553769A (en) * | 2019-09-26 | 2019-12-10 | 深圳市鑫精诚科技有限公司 | Novel strain type pressure-torsion two-dimensional force sensor |
| CN110553781A (en) * | 2019-09-26 | 2019-12-10 | 深圳市鑫精诚科技有限公司 | Novel strain type six-axis force sensor |
| CN212585882U (en) * | 2020-09-16 | 2021-02-23 | 深圳市鑫精诚科技有限公司 | Novel strain type pressure two-dimensional force sensor |
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