CN110553769A - Novel strain type pressure-torsion two-dimensional force sensor - Google Patents
Novel strain type pressure-torsion two-dimensional force sensor Download PDFInfo
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- CN110553769A CN110553769A CN201910919984.6A CN201910919984A CN110553769A CN 110553769 A CN110553769 A CN 110553769A CN 201910919984 A CN201910919984 A CN 201910919984A CN 110553769 A CN110553769 A CN 110553769A
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- Prior art keywords
- flange plate
- torsion
- strain gauge
- resistance strain
- coupled
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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
- G01L1/2218—Special supports with preselected places to mount the resistance strain gauges; Mounting of supports the supports being of the column type, e.g. cylindric, adapted for measuring a force along a single direction
-
- 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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- 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-torsion two-dimensional force sensor which comprises an elastic element, wherein the elastic element comprises an upper flange plate, a middle flange plate and a lower flange plate which are sequentially arranged at intervals from top to bottom; the upper flange plate, the middle flange plate and the lower flange plate are all horizontally arranged; four torsion strain beams which are longitudinally arranged are arranged between the upper flange plate and the middle flange plate, a T-shaped beam is arranged between the middle flange plate and the lower flange plate, the T-shaped beam comprises a longitudinal beam which longitudinally extends and a transverse beam which horizontally extends, and the transverse beam is provided with a through groove which horizontally extends; because the pressure measurement adopts the structural design of a T-shaped beam and a double-hole parallel beam, the eccentric load resistance and the lateral load resistance are strong, and the dynamic and static application performances are improved. Because the torsion measurement adopts the structural design of four torsion beams, the bearing capacity is strong, the large and small measuring ranges can be made, the precision is high, and the reliability is good.
Description
Technical Field
The invention relates to the technical field of sensors, in particular to a novel strain type pressure-torsion two-dimensional force sensor.
Background
Under the rapid development of the industrial automation trend, the automatic assembly technology is realized in more and more fields nowadays, such as the appearance of an automatic screw tightening system and an automatic watch assembly machine in the 3C industry and the automatic assembly of bottled beverages and wines. However, in these assemblies, there is a problem that in an automatic screw tightening system, screws to be tightened are different in size, required tightening force and downward pressure are different, if the screws are small screws, the phenomenon of wire slipping occurs when the tightening force is too large, and products are crushed when the downward pressure is too large, so that the problems are solved by a sensor capable of accurately controlling pressure and torque output, the production efficiency and the product quality are improved, and the product reject ratio is reduced.
Disclosure of Invention
The invention aims to provide a novel strain type pressure-torsion two-dimensional force sensor, and aims to solve the problem that a sensor which has better performance and can measure pressure and torsion in real time is lacked in the prior art.
The invention is realized in this way, a novel strain type pressure-torsion two-dimensional force sensor comprises an elastic element, wherein the elastic element comprises an upper flange plate, a middle flange plate and a lower flange plate which are sequentially arranged at intervals from top to bottom; the upper flange plate, the middle flange plate and the lower flange plate are all horizontally arranged; four torsion strain beams which are longitudinally arranged are arranged between the upper flange plate and the middle flange plate, a T-shaped beam is arranged between the middle flange plate and the lower flange plate, the T-shaped beam comprises a longitudinal beam which longitudinally extends and a transverse beam which horizontally extends, and the transverse beam is provided with a through groove which horizontally extends; the four torsion strain beams are respectively and correspondingly adhered with a resistance strain gauge R1, a resistance strain gauge R2, a resistance strain gauge R3 and a resistance strain gauge R4, and the resistance strain gauge R1, the resistance strain gauge R2, the resistance strain gauge R3 and the resistance strain gauge R4 form a torsion measurement Wheatstone bridge; 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 pressure measurement wheatstone bridge.
Furthermore, the top of the longitudinal beam is connected with the middle flange plate, the top of the cross beam is connected with the bottom of the longitudinal beam, and the bottom of the cross beam is connected with the lower flange plate.
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 elastic element is sleeved with a sleeve for protecting the elastic element.
Furthermore, the outer edge of the upper end face of the lower flange plate is provided with an annular limiting notch, and the annular limiting notch is used for fixedly placing the sleeve and limiting the sleeve.
Furthermore, the four torsion strain beams and the center of the middle flange plate are uniformly arranged at intervals in a surrounding mode.
Further, the upper flange plate is provided with a plurality of first threaded holes for installing and fixing the sensor to a specified position.
Further, the lower flange plate is provided with a plurality of second threaded holes for fixing the sensor to a specified position.
Compared with the prior art, the novel strain type pressure-torsion two-dimensional force sensor provided by the invention has strong eccentric load resistance and lateral load resistance and improves dynamic and static application performances because the pressure measurement adopts a structural design of a T-shaped beam and a double-hole parallel beam. Because the torsion measurement adopts the structural design of four torsion beams, the bearing capacity is strong, the large and small measuring ranges can be made, the precision is high, and the reliability is good. The sensor integrally adopts the structural design of three-level flange plates, four parallel torsion beams and T-shaped beams, has simple and compact structure, is convenient to install and disassemble, saves installation space, and can meet the force value control in the fields of automatic screw tightening systems, automatic watch assembling machines, automatic bottle cap assembling systems and the like, thereby improving the production efficiency and reducing the reject ratio of products.
Drawings
Fig. 1 is a schematic perspective view of a novel strain type pressure-torsion two-dimensional force sensor provided by an embodiment of the invention;
FIG. 2 is an exploded view of a novel strain-type pressure-torsion two-dimensional force sensor provided by an embodiment of the present invention;
Fig. 3 is a circuit diagram of a torsion measurement wheatstone bridge provided by an embodiment of the present invention.
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. 1-3, preferred embodiments of the present invention are provided.
A novel strain type pressure-torsion two-dimensional force sensor comprises an elastic element, wherein the elastic element comprises an upper flange plate, a middle flange plate and a lower flange plate which are sequentially arranged at intervals from top to bottom; the upper flange plate, the middle flange plate and the lower flange plate are all horizontally arranged; four torsion strain beams which are longitudinally arranged are arranged between the upper flange plate and the middle flange plate, a T-shaped beam is arranged between the middle flange plate and the lower flange plate, the T-shaped beam comprises a longitudinal beam which longitudinally extends and a transverse beam which horizontally extends, and the transverse beam is provided with a through groove which horizontally extends; the four torsion strain beams are respectively and correspondingly adhered with a resistance strain gauge R1, a resistance strain gauge R2, a resistance strain gauge R3 and a resistance strain gauge R4, and the resistance strain gauge R1, the resistance strain gauge R2, the resistance strain gauge R3 and the resistance strain gauge R4 form a torsion measurement Wheatstone bridge; 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 pressure measurement wheatstone bridge.
According to the novel strain type pressure-torsion 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 torsion strain beam, when torsion occurs, the resistance of the resistance strain gauge on the torsion strain beam changes, and the torsion value is measured through a torsion 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, when pressure exists, the resistance of the resistance strain gauge on the beam changes, the pressure value is measured through a pressure measurement Wheatstone bridge, and real-time torque and pressure measurement can be realized; the elastic element adopts the structural design of a three-level flange plate, four parallel torsion beams and a T-shaped beam, and has simple and compact structure and convenient installation and disassembly; the torsion measurement adopts the structural design of four torsion beams, so that the bearing capacity is strong, the large and small measuring ranges can be made, the precision is high, and the manufacturability is good; the pressure measurement adopts the structural design of a T-shaped beam, the structure is simple and compact, the space is saved, the precision is high, and the reliability is good.
According to the novel strain type pressure-torsion two-dimensional force sensor provided by the invention, the pressure measurement adopts a structural design of a T-shaped beam and a double-hole parallel beam, so that the eccentric load resistance and the lateral load resistance are strong, and the dynamic and static application performances are improved. Because the torsion measurement adopts the structural design of four torsion beams, the bearing capacity is strong, the large and small measuring ranges can be made, the precision is high, and the reliability is good. The sensor integrally adopts the structural design of three-level flange plates, four parallel torsion beams and T-shaped beams, has simple and compact structure, is convenient to install and disassemble, saves installation space, and can meet the force value control in the fields of automatic screw tightening systems, automatic watch assembling machines, automatic bottle cap assembling systems and the like, thereby improving the production efficiency and reducing the reject ratio of products.
Specifically, the top of the longitudinal beam is connected with a middle flange plate, the top of the cross beam is connected with the bottom of the longitudinal beam, and the bottom of the cross beam is connected with the lower flange plate; like this, the crossbeam setting is in the longeron below for the weight that the longeron bore is still less, and whole structure's stability is stronger, and the bearing capacity is stronger.
Furthermore, a first end of the resistance strain gauge R1 is coupled to a positive terminal of a power supply, a first end of the resistance strain gauge R4 is coupled to a second end of the resistance strain gauge R1, a second end of the resistance strain gauge R4 is coupled to a negative terminal of the power supply, a first end of the resistance strain gauge R2 is coupled to a first end of the resistance strain gauge R1, a first end of the resistance strain gauge R3 is coupled to a second end of the resistance strain gauge R2, and a second end of the resistance strain gauge R3 is coupled to a negative terminal of the power supply, when the upper flange plate is subjected to a torsion force, resistances of the resistance strain gauge R1 and the resistance strain gauge R3 are increased, resistances of the resistance strain gauge R2 and the resistance strain gauge R4 are decreased, and if the bridge is powered by U, a voltage U 0 is.
Similarly, a first end of the resistance strain gauge R5 is coupled to a positive terminal of a power supply, a first end of the resistance strain gauge R8 is coupled to a second end of the resistance strain gauge R5, a second end of the resistance strain gauge R8 is coupled to a negative terminal of the power supply, a first end of the resistance strain gauge R6 is coupled to a first end of the resistance strain gauge R5, a first end of the resistance strain gauge R7 is coupled to a second end of the resistance strain gauge R6, and a second end of the resistance strain gauge R7 is coupled to a negative terminal of the power supply, when the upper flange is pressed, resistances of R5 and R7 are increased, resistances of R6 and R8 are decreased, and when the bridge supplies power to U 3, a voltage U 4 is output, so that the pressure is converted into a measurable voltage signal.
In this embodiment, the elastic element is sleeved with a sleeve for protecting the elastic element.
Furthermore, the outer edge of the upper end face of the lower flange plate is provided with an annular limiting notch, and the annular limiting notch is used for fixedly placing the sleeve and limiting the sleeve; therefore, the sleeve is convenient to mount and fix, and the sleeve is mounted and fixed on the lower flange plate in a laser welding mode.
Specifically, the four torsion strain beams and the center of the middle flange plate are uniformly arranged at intervals around the center; the arrangement mode can ensure stable pressure transmission and has strong unbalance loading resistance.
further, the upper flange plate is provided with a plurality of first threaded holes for installing and fixing the sensor to a specified position.
Furthermore, the lower flange plate is provided with a plurality of second threaded holes for mounting and fixing the sensor to a specified position.
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 (9)
1. A novel strain type pressure-torsion two-dimensional force sensor is characterized by comprising an elastic element, wherein the elastic element comprises an upper flange plate, a middle flange plate and a lower flange plate which are sequentially arranged at intervals from top to bottom; the upper flange plate, the middle flange plate and the lower flange plate are all horizontally arranged; four torsion strain beams which are longitudinally arranged are arranged between the upper flange plate and the middle flange plate, a T-shaped beam is arranged between the middle flange plate and the lower flange plate, the T-shaped beam comprises a longitudinal beam which longitudinally extends and a transverse beam which horizontally extends, and the transverse beam is provided with a through groove which horizontally extends; the four torsion strain beams are respectively and correspondingly adhered with a resistance strain gauge R1, a resistance strain gauge R2, a resistance strain gauge R3 and a resistance strain gauge R4, and the resistance strain gauge R1, the resistance strain gauge R2, the resistance strain gauge R3 and the resistance strain gauge R4 form a torsion measurement Wheatstone bridge; 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 pressure measurement wheatstone bridge.
2. The novel strain-type pressure-torsion two-dimensional force sensor as claimed in claim 1, wherein the top of the longitudinal beam is connected with the middle flange, the top of the cross beam is connected with the bottom of the longitudinal beam, and the bottom of the cross beam is connected with the lower flange.
3. The novel strain-type pressure-torsion 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-torsion 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. A novel strain-type pressure-torsion two-dimensional force sensor as claimed in any one of claims 1-4, wherein a sleeve for protecting the elastic element is sleeved on the outer periphery of the elastic element.
6. The novel strain-type pressure-torsion two-dimensional force sensor as claimed in claim 5, wherein an annular limiting notch is formed in the outer edge of the upper end face of the lower flange, and is used for fixedly placing and limiting the sleeve.
7. A novel strain-type pressure-torsion two-dimensional force sensor as claimed in any one of claims 1-4, wherein four torsion strain beams are uniformly spaced around the center of the middle flange plate.
8. The novel strain-type pressure-torsion two-dimensional force sensor as claimed in any one of claims 1-4, wherein the upper flange is provided with a plurality of first threaded holes for mounting and fixing the sensor to a specified position.
9. The novel strain-type pressure-torsion two-dimensional force sensor as claimed in any one of claims 1-4, wherein the lower flange 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 |
|---|---|---|---|
| CN201910919984.6A CN110553769A (en) | 2019-09-26 | 2019-09-26 | Novel strain type pressure-torsion two-dimensional force sensor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910919984.6A CN110553769A (en) | 2019-09-26 | 2019-09-26 | Novel strain type pressure-torsion two-dimensional force sensor |
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| CN110553769A true CN110553769A (en) | 2019-12-10 |
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| CN201910919984.6A Pending CN110553769A (en) | 2019-09-26 | 2019-09-26 | Novel strain type pressure-torsion two-dimensional force sensor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112014010A (en) * | 2020-09-16 | 2020-12-01 | 深圳市鑫精诚科技有限公司 | Novel strain type pressure two-dimensional force sensor |
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2019
- 2019-09-26 CN CN201910919984.6A patent/CN110553769A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112014010A (en) * | 2020-09-16 | 2020-12-01 | 深圳市鑫精诚科技有限公司 | Novel strain type pressure two-dimensional force sensor |
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