CN112595394A - Tangential arc strain gauge, radial strain gauge and supporting leg weighing sensor - Google Patents
Tangential arc strain gauge, radial strain gauge and supporting leg weighing sensor Download PDFInfo
- Publication number
- CN112595394A CN112595394A CN202011428376.4A CN202011428376A CN112595394A CN 112595394 A CN112595394 A CN 112595394A CN 202011428376 A CN202011428376 A CN 202011428376A CN 112595394 A CN112595394 A CN 112595394A
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- Prior art keywords
- sensitive
- strain gauge
- tangential
- radial
- arc
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G3/00—Weighing apparatus characterised by the use of elastically-deformable members, e.g. spring balances
- G01G3/12—Weighing apparatus characterised by the use of elastically-deformable members, e.g. spring balances wherein the weighing element is in the form of a solid body stressed by pressure or tension during weighing
- G01G3/14—Weighing apparatus characterised by the use of elastically-deformable members, e.g. spring balances wherein the weighing element is in the form of a solid body stressed by pressure or tension during weighing measuring variations of electrical resistance
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G3/00—Weighing apparatus characterised by the use of elastically-deformable members, e.g. spring balances
- G01G3/12—Weighing apparatus characterised by the use of elastically-deformable members, e.g. spring balances wherein the weighing element is in the form of a solid body stressed by pressure or tension during weighing
- G01G3/14—Weighing apparatus characterised by the use of elastically-deformable members, e.g. spring balances wherein the weighing element is in the form of a solid body stressed by pressure or tension during weighing measuring variations of electrical resistance
- G01G3/142—Circuits specially adapted therefor
Abstract
The invention discloses a tangential arc strain gauge, a radial strain gauge and a support leg weighing sensor, wherein the tangential arc strain gauge comprises a first substrate and a first sensitive grid; the first sensitive grid comprises at least two first sensitive sections and a first transition section; the radial strain gauge comprises a second substrate and a second sensitive grid; the second sensitive grid comprises at least two second sensitive sections and a second transition section; the support leg weighing sensor comprises a base, a fastener, a connecting piece and a support ball; the support leg weighing cell still includes: and arranging strain areas of the tangential arc strain gauge and the radial strain gauge. According to the invention, the problem that the strain value measured by the measuring point has certain deviation because the weighing sensor is cylindrical or round and the stress deformation of the weighing sensor is decomposed into the X axis and the Y axis which are vertical to each other is not suitable is solved, the measuring error is effectively reduced, and the measuring accuracy is improved.
Description
Technical Field
The invention relates to the technical field of strain gauges, in particular to a tangential arc-shaped strain gauge, a radial strain gauge and a support leg weighing sensor.
Background
A strain gauge is an element for measuring strain that is constituted by a sensitive grid or the like. The working principle of the resistance strain gauge is based on the strain effect, that is, when a conductor or a semiconductor material is mechanically deformed under the action of external force, the resistance value of the conductor or the semiconductor material is correspondingly changed, and the phenomenon is called the strain effect.
When the traditional linear sensitive section is used for weighing and measuring, due to different stress, deformation and resistance changes of all points on the sensitive section, a strain value measured by a measuring point has certain deviation, and a weighing result has certain error.
Disclosure of Invention
In view of the defects in the prior art, the invention aims to solve the technical problems that a tangential arc-shaped strain gauge, a radial strain gauge and a support leg weighing sensor are provided, and the problem that a strain value measured by a measuring point has certain deviation due to the fact that the weighing sensor is cylindrical or round and the stress deformation of the weighing sensor is decomposed into X-axis and Y-axis which are mutually perpendicular is not suitable is solved, so that the measuring error is effectively reduced, and the measuring accuracy is improved.
In order to achieve the above object, the present invention provides a tangential arc strain gauge, which includes a first substrate and a first sensitive grid disposed on the first substrate; the first sensitive grid comprises at least two first sensitive sections and a first transition section connected between the first sensitive sections; each first sensitive section is a concentric circular arc and is sequentially arranged at equal intervals, each first sensitive section and each first transition section are sequentially connected in series to form the first sensitive grid, and an extension line of a connecting line of the centers of at least two first sensitive sections points to a first circle center of the concentric circular arc; the first sensitive segment is used for detecting the tangential deformation of the concentric circular arcs; the first resistance of the first sensitive segment is far greater than the second resistance of the first transition segment; and a first pin and a second pin are led out from two ends of the first sensitive grid.
In the technical scheme, each first sensitive segment is set to be arc-shaped, and during weighing measurement, the magnitude of external force borne by each point of the first sensitive segment is the same, so that the magnitude of deformation of each point of the first sensitive segment is the same, and the magnitude of change of resistance values of each point of the first sensitive segment is the same; in the traditional linear sensitive section, due to different stress of each point, the deformation quantity of each point of the sensitive section is inconsistent, and the resistance value change of each point of the sensitive section is inconsistent; the arc-shaped sensitive segment can effectively reduce the measurement error and improve the accuracy of the measurement result relative to the linear sensitive segment; the tangential arc strain gauge can effectively measure the component force of a certain measuring point in the tangential direction.
In one embodiment, the lengths of the first sensitive segments are equal.
In one embodiment, the central angles of the first sensitive segments are equal in size.
In order to achieve the above object, the present invention further provides a radial strain gage, which includes a second substrate and a second sensitive grid disposed on the second substrate; the second sensitive grid comprises at least two second sensitive sections and a second transition section connected between the second sensitive sections; the extension lines of the second sensitive sections point to a second circle center, the second sensitive sections are arranged in a fan shape at equal intervals in sequence, the centers of the second sensitive sections are located on a first circular arc, and the circle center of the first circular arc is the second circle center; each second sensitive section and each second transition section are sequentially connected in series to form a second sensitive grid; the second sensitive segment is used for detecting the radial deformation of the first arc; the third resistance of the second sensitive segment is far greater than the fourth resistance of the second transition segment; and a third pin and a fourth pin are led out from two ends of the second sensitive grid.
In the technical scheme, the extension lines of the second sensitive segments are arranged to point to the second circle center, so that the stress in the direction pointing to the measuring point can be effectively measured during weighing measurement.
In one embodiment, each of the second sensitive segments is equal in length.
In a specific embodiment, the second transition section is a straight line section or an arc section with the second circle center as a circle center.
In order to achieve the above object, the present invention further provides a support leg weighing sensor, which includes a base, a fastener, a connecting member, and a support ball; the base is detachably connected with the fastener and forms an accommodating space, the supporting ball is arranged between the base and the connecting piece, and the supporting ball and the supporting end of the connecting piece are limited to move in the accommodating space; the bottom end surface of the base comprises at least two strain areas which are arranged in a circular ring shape;
the support foot weighing sensor further comprises:
the tangential arcuate strain gage as set forth in any one of claims 1-3;
and the radial strain gage as provided in any one of claims 4-6;
wherein each strain region is provided with the tangential arc strain gauge and the radial strain gauge; the first circle center of the first sensitive grid of the tangential arc strain gauge, the second circle center of the second sensitive grid of the radial strain gauge and the third circle centers of at least two strain areas which are arranged in a ring are overlapped; the tangential arc strain gauge and the radial strain gauge are connected in a bridge combination mode of a Wheatstone bridge.
In the technical scheme, the tangential arc strain gauge and the radial strain gauge are arranged in each strain area, so that component forces in the tangential direction and the radial direction of a measuring point can be measured during weighing measurement, and compared with a traditional linear strain gauge, the measuring error is effectively reduced, and the measuring accuracy is effectively improved.
The invention has the beneficial effects that: the traditional strain gauges split the deformation into an X axis and a Y axis which are perpendicular to each other, at the moment, the sensitive sections of the two groups of strain gauges are linear and perpendicular to each other; in the invention, the weighing sensor is considered to be cylindrical or round in many application scenes, and the stress deformation of the weighing sensor is decomposed into X-axis and Y-axis which are vertical to each other and are not suitable for use; for example, a circular accommodating groove is formed in the cylinder, a strain gauge is arranged in the groove, the strain region is pulled by the cylindrical wall at the moment, so that the deformation of the strain region is limited, and the deformation of the strain region is considered to be the deformation along the radial direction and the arc deformation around the center of the circle; in the invention, the profiles of the strain gauge and the sensitive section thereof are designed to be arc-shaped, so that the strain gauge deformation of the round sensor can be effectively sensed, the stress of the sensor can be accurately obtained, the measurement error can be effectively reduced, and the accuracy of the measurement result can be improved.
Drawings
FIG. 1 is a schematic diagram of a first grating of a tangential curved strain gage in accordance with one embodiment of the present invention;
FIG. 2 is a schematic diagram of a second grating of the radial strain gage in accordance with one embodiment of the present invention;
FIG. 3 is a cross-sectional view of a leg load cell in accordance with one embodiment of the present invention;
FIG. 4 is a schematic diagram of a wheatstone bridge configuration in accordance with an embodiment of the present invention;
FIG. 5 is a simplified electrical bridge diagram of tangential arc strain gages and radial strain gages in accordance with one embodiment of the present invention.
Detailed Description
The invention is further illustrated by the following examples in conjunction with the accompanying drawings:
as shown in fig. 1, in a first embodiment of the present invention, a tangential arc strain gauge 100 is provided, where the tangential arc strain gauge 100 includes a first substrate and a first sensitive grid disposed on the first substrate; the first sensitive grid comprises at least two first sensitive sections 101 and a first transition section 102 connected between the first sensitive sections 101; each first sensitive segment 101 is a concentric circular arc and is sequentially arranged at equal intervals, each first sensitive segment 101 and each first transition segment 102 are sequentially connected in series to form the first sensitive grid, and the extension line of the connecting line of the centers of at least two first sensitive segments 101 points to the first circle center of the concentric circular arc; the first sensitive segment 101 is used for detecting the tangential deformation of the concentric circular arcs; the first resistance of the first sensitive segment 101 is much greater than the second resistance of the first transition segment 102; a first pin 103 and a second pin 104 are led out from two ends of the first sensitive grid.
In the present embodiment, the lengths of the first sensitive segments 101 are equal.
In this embodiment, the central angles corresponding to the first sensitive segments 101 are equal in size.
As shown in fig. 2, in a second embodiment of the present invention, a radial strain gage 200, where the radial strain gage 200 includes a second substrate and a second sensitive grid disposed on the second substrate; the second sensitive grid comprises at least two second sensitive sections 201 and a second transition section 202 connected between the second sensitive sections 201; the extension lines of the second sensitive segments 201 point to a second circle center, the second sensitive segments 201 are arranged in a fan shape at equal intervals in sequence, the centers of the second sensitive segments 201 are located on a first circular arc, and the circle center of the first circular arc is the second circle center; each second sensitive section 201 and each second transition section 202 are sequentially connected in series to form the second sensitive grid; the second sensitive segment 201 is used for detecting the radial deformation of the first arc; the third resistance of the second sensitive segment 201 is much greater than the fourth resistance of the second transition segment 202; and a third pin 203 and a fourth pin 204 are led out from two ends of the second sensitive grid.
In this embodiment, the lengths of the second sensitive segments 201 are equal.
In this embodiment, the second transition section 202 is a straight line section or an arc section with the second circle center as the center.
As shown in fig. 3 to 5, in a third embodiment of the present invention, a foot load cell is provided, which includes a base 300, a fastener 400, a connecting member 500, a support ball 600; the base 300 is detachably connected with the fastener 400 and forms a receiving space, the support ball 600 is disposed between the base 300 and the connector 500, and the support ends of the support ball 600 and the connector 500 are limited to move in the receiving space; the bottom end surface of the base 300 comprises at least two strain zones 301 arranged in a circular ring;
the support foot weighing sensor further comprises:
the tangential arcuate strain gage 100 as set forth in any one of claims 1-3;
and the radial strain gage 200 provided in any one of claims 4-6;
wherein each strain region 301 is provided with the tangential arc strain gauge 100 and the radial strain gauge 200; the first circle center of the first sensitive grid of the tangential arc strain gauge 100, the second circle center of the second sensitive grid of the radial strain gauge 200 and the third circle centers of at least two strain regions 301 arranged in a ring are overlapped; the tangential arc strain gage 100 and the radial strain gage 200 are connected by a bridge of a wheatstone bridge.
Specific embodiments of the present invention have been described above in detail. It is to be understood that the specific embodiments of the present invention are not exclusive and that modifications and variations may be made by one of ordinary skill in the art in light of the spirit of the present invention, within the scope of the appended claims. Therefore, technical solutions that can be obtained by a person skilled in the art through logic analysis, reasoning or limited experiments based on the prior art according to the embodiments of the present invention should be within the scope of protection defined by the claims.
Claims (7)
1. The tangential arc strain gauge is characterized by comprising a first substrate and a first sensitive grid arranged on the first substrate; the first sensitive grid comprises at least two first sensitive sections and a first transition section connected between the first sensitive sections; each first sensitive section is a concentric circular arc and is sequentially arranged at equal intervals, each first sensitive section and each first transition section are sequentially connected in series to form the first sensitive grid, and an extension line of a connecting line of the centers of at least two first sensitive sections points to a first circle center of the concentric circular arc; the first sensitive segment is used for detecting the tangential deformation of the concentric circular arcs; the first resistance of the first sensitive segment is far greater than the second resistance of the first transition segment; and a first pin and a second pin are led out from two ends of the first sensitive grid.
2. The tangential arcuate strain gage of claim 1 wherein each of said first sensitive segments is of equal length.
3. The tangential arcuate strain gage of claim 1, wherein the respective corresponding central angles of each of said first sensitive segments are equal in magnitude.
4. The radial strain gauge is characterized by comprising a second substrate and a second sensitive grid arranged on the second substrate; the second sensitive grid comprises at least two second sensitive sections and a second transition section connected between the second sensitive sections; the extension lines of the second sensitive sections point to a second circle center, the second sensitive sections are arranged in a fan shape at equal intervals in sequence, the centers of the second sensitive sections are located on a first circular arc, and the circle center of the first circular arc is the second circle center; each second sensitive section and each second transition section are sequentially connected in series to form a second sensitive grid; the second sensitive segment is used for detecting the radial deformation of the first arc; the third resistance of the second sensitive segment is far greater than the fourth resistance of the second transition segment; and a third pin and a fourth pin are led out from two ends of the second sensitive grid.
5. The radial strain gage of claim 4, wherein each of said second sensitive segments is of equal length.
6. The radial strain gage of claim 4, wherein the second transition section is a straight section or a circular section centered at the second center of circle.
7. The supporting leg weighing sensor is characterized by comprising a base, a fastener, a connecting piece and a supporting ball; the base is detachably connected with the fastener and forms an accommodating space, the supporting ball is arranged between the base and the connecting piece, and the supporting ball and the supporting end of the connecting piece are limited to move in the accommodating space; the bottom end surface of the base comprises at least two strain areas which are arranged in a circular ring shape;
the support foot weighing sensor further comprises:
the tangential arcuate strain gage as set forth in any one of claims 1-3;
and the radial strain gage as provided in any one of claims 4-6;
wherein each strain region is provided with the tangential arc strain gauge and the radial strain gauge; the first circle center of the first sensitive grid of the tangential arc strain gauge, the second circle center of the second sensitive grid of the radial strain gauge and the third circle centers of at least two strain areas which are arranged in a ring are overlapped; the tangential arc strain gauge and the radial strain gauge are connected in a bridge combination mode of a Wheatstone bridge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011428376.4A CN112595394A (en) | 2020-12-07 | 2020-12-07 | Tangential arc strain gauge, radial strain gauge and supporting leg weighing sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011428376.4A CN112595394A (en) | 2020-12-07 | 2020-12-07 | Tangential arc strain gauge, radial strain gauge and supporting leg weighing sensor |
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|---|---|
| CN112595394A true CN112595394A (en) | 2021-04-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011428376.4A Pending CN112595394A (en) | 2020-12-07 | 2020-12-07 | Tangential arc strain gauge, radial strain gauge and supporting leg weighing sensor |
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| CN (1) | CN112595394A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1033481A (en) * | 1987-12-11 | 1989-06-21 | 巴布科克和威尔科斯公司 | Utilize the pressure transducer of thick-film resistor |
| CN101245976A (en) * | 2007-11-26 | 2008-08-20 | 中北大学 | Integrated electric voltage detector based on strain effect |
| CN201488787U (en) * | 2009-07-30 | 2010-05-26 | 闻一萌 | Force-measuring weighing sensor |
| CN103134417A (en) * | 2011-11-24 | 2013-06-05 | 中国航空工业集团公司沈阳发动机设计研究所 | High-temperature dynamic strain meter |
| CN103727107A (en) * | 2014-01-13 | 2014-04-16 | 清华大学 | Strain piece pasting device suitable for weighing force measuring sensor |
| CN103954262A (en) * | 2014-05-07 | 2014-07-30 | 范鹏贤 | Device for measuring radial deformation of cylindrical test piece |
| CN105547132A (en) * | 2015-12-04 | 2016-05-04 | 浙江工业大学 | Transverse distribution three sensitive grid metal strain gauge capable of measuring bias sensitive grid center transverse partial deviation |
| WO2020129069A1 (en) * | 2018-12-20 | 2020-06-25 | Ezmems Ltd. | Sensors based on multiple strain gauges, design and methods of manufacture thereof |
-
2020
- 2020-12-07 CN CN202011428376.4A patent/CN112595394A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1033481A (en) * | 1987-12-11 | 1989-06-21 | 巴布科克和威尔科斯公司 | Utilize the pressure transducer of thick-film resistor |
| CN101245976A (en) * | 2007-11-26 | 2008-08-20 | 中北大学 | Integrated electric voltage detector based on strain effect |
| CN201488787U (en) * | 2009-07-30 | 2010-05-26 | 闻一萌 | Force-measuring weighing sensor |
| CN103134417A (en) * | 2011-11-24 | 2013-06-05 | 中国航空工业集团公司沈阳发动机设计研究所 | High-temperature dynamic strain meter |
| CN103727107A (en) * | 2014-01-13 | 2014-04-16 | 清华大学 | Strain piece pasting device suitable for weighing force measuring sensor |
| CN103954262A (en) * | 2014-05-07 | 2014-07-30 | 范鹏贤 | Device for measuring radial deformation of cylindrical test piece |
| CN105547132A (en) * | 2015-12-04 | 2016-05-04 | 浙江工业大学 | Transverse distribution three sensitive grid metal strain gauge capable of measuring bias sensitive grid center transverse partial deviation |
| WO2020129069A1 (en) * | 2018-12-20 | 2020-06-25 | Ezmems Ltd. | Sensors based on multiple strain gauges, design and methods of manufacture thereof |
Non-Patent Citations (1)
| Title |
|---|
| 蒋敦斌 等: "《非电量测量与传感器应用》", 31 January 2005, 国防工业出版社 * |
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