CN215491521U - Long-life high-precision angle sensor - Google Patents
Long-life high-precision angle sensor Download PDFInfo
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- CN215491521U CN215491521U CN202122165005.8U CN202122165005U CN215491521U CN 215491521 U CN215491521 U CN 215491521U CN 202122165005 U CN202122165005 U CN 202122165005U CN 215491521 U CN215491521 U CN 215491521U
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Abstract
The utility model discloses a long-life high-precision angle sensor, which comprises a resistor body, wherein the resistor body is in an annular sheet shape, and a gold-plated middle guide ring is embedded in the resistor body; the resistor body and the brush in the angle sensor form an angle sensing element. The utility model has simple structure, ingenious conception, high position indication precision, stable working performance and super long working and storage life, effectively breaks the supply barrier of the existing electric steering engine angle sensor with high quality and low cost, and meets the requirements of high precision, high sensitivity, high reliability, long endurance and repeated use of various unmanned aerial vehicles and unmanned aerial vehicles.
Description
Technical Field
The utility model relates to the technical field of angle sensors, in particular to a long-service-life high-precision angle sensor used in an unmanned aerial vehicle steering engine.
Background
At present of high-speed development of various unmanned aerial vehicles and unmanned aerial vehicles, an angle sensor is also widely applied as a position information sensing element in control of an unmanned aerial vehicle steering engine, the sensor is an important component of an electric steering engine, the precision, the sensitivity and the reliability of the sensor directly relate to the dynamic and static characteristics of the steering engine, and the control performance of the unmanned aerial vehicle is directly influenced. Electric steering engine is various in kind, model among servo, and the angle sensor who wherein uses also is the confetti eight doors, and is different: the sensor for the striking type unmanned aerial vehicle is required to have high precision, high sensitivity and high reliability, and the sensor is disposable, so that the sensor has no excessive requirement on the service life; for long-endurance unmanned aerial vehicles and hypersonic unmanned aerial vehicles, the requirement is high precision, high sensitivity and high reliability, and the long service life is required to ensure the characteristics of repeated use and long-time flight. At present, an electric steering engine angle sensor of an unmanned aerial vehicle is mostly imported when being used for long endurance, is not only cheap, but also needs to meet the installation size requirement of the imported sensor in the steering engine design, and the current situation can not meet the practical requirement, so that a similar sensor is researched and developed, the high-precision, high-sensitivity and high-reliability servo system angle sensor is enabled to meet the requirement, and the servo system angle sensor with long service life is necessary.
Meanwhile, the angle sensor for the electric steering engine is basically similar to the working principle and structure, and most of the angle sensor is a potentiometer type angle sensor adopting resistance voltage division. The voltage-dividing angle sensor generally adopts an unclosed annular resistor body and an electric brush to complete conversion between an angle and electric quantity, so that the angle is sensed. A resistance band and a middle conduction band are arranged on a common resistor body, the resistance band is made of conductive plastics, and the middle conduction band is made of composite conductive paste. The resistance band made of the conductive plastic film is very wear-resistant when being matched with an electric brush for use; the abrasion resistance of the composite conductive paste material for forming the middle conduction band is much lower than that of conductive plastic, which is a regret for limiting the service life of the sensor.
Therefore, it is an important research direction for those skilled in the art to provide a novel angle sensor with high precision, high sensitivity and high reliability and an ultra-long service life to overcome the defects of the similar products.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides a high-precision angle sensor with a long service life, and the specific technical scheme is as follows:
a long-life high-precision angle sensor comprises a resistor body, wherein the resistor body is in an annular sheet shape, and a gold-plated middle guide ring is embedded in the resistor body; the resistor body and the brush in the angle sensor form an angle sensing element.
Aiming at the defects of the similar products, the utility model abandons the classic mode that silver paste is used along with a conduction band in the resistor body, provides a novel angle sensor which uses a gold-plated copper ring to be embedded into the resistor body to replace the conduction band in the composite conductive paste, and the gold-plated copper ring has far better wear resistance and conductivity than the conduction band in the composite conductive paste and has super long service life. According to the utility model, the gold-plated copper ring is arranged at the proper position of the core component resistor body and is arranged on the running track of the electric brush, so that the manufactured special angle sensor for the electric steering engine has the characteristics of high precision, high sensitivity, high reliability and super long service life.
Preferably, the resistor body is a precise conductive plastic resistor body formed by a hot-pressing process, and has the characteristics of smooth working surface, low noise and good electromagnetic compatibility; the electric brush is made of palladium-iridium alloy materials, and the working noise is low.
Preferably, the angle sensor further comprises a shell and a rotating shaft, wherein one side of the shell is connected with an end cover, and a first bearing, a second bearing and the resistor body are installed inside the shell; the rotating shaft extends into the shell through the end cover and is in rotating connection with the first bearing and the second bearing; the first bearing is positioned on one side, close to the end cover, in the shell, and the second bearing is positioned on one side, far away from the end cover, in the shell; a first electric brush and a second electric brush are arranged on the rotating shaft between the first bearing and the second bearing, and the first electric brush and the second electric brush jointly form the electric brush; the resistor body is arranged on the rotating shaft between the electric brush and the second bearing and is connected with the rotating shaft through the gold-plated middle guide ring; the first electric brush is in sliding contact with the gold-plated middle guide ring, and the second electric brush is in sliding contact with the corresponding surface of the resistor body; and the resistor body is connected with a lead-out signal wire.
The angle sensor has the advantages of high linear precision, extremely high resolution and long service life. When the electric steering engine works, a signal provided for a servo system is an accurate position signal, and the characteristics of repeated use, long time and repeated use of the unmanned aerial vehicle are met.
Preferably, the axis of the rotating shaft is concentric with the axis of the gold-plated middle guide ring.
Preferably, the first brush and the second brush are fixed to a stationary slip ring by a brush fixing member, and the first brush and the second brush are respectively disposed on opposite sides of the stationary slip ring; the rotating shaft is sleeved with an injection molding bush, and the fixed sliding ring is fixedly connected with the injection molding bush.
Preferably, a joint surface of the rotating shaft corresponding to the injection molding bush is provided with an annular joint groove, so that the injection molding bush and the rotating shaft are connected more stably.
Preferably, the outer sides of the first bearing and the second bearing are respectively provided with a gasket, and the gaskets are tightly connected with the corresponding first bearing and the second bearing through compression check rings; and the positions of the rotating shaft, on which the gasket and the pressing retaining ring are correspondingly arranged, are provided with a first annular groove and a second annular groove, so that the gasket and the pressing retaining ring are fixed.
Preferably, in order to improve the conductive contact property and the wear resistance of the gold-plated intermediate guide ring, the gold-plated intermediate guide ring is subjected to hard gold plating treatment, forms a polished surface and is in contact with the first brush; and a conductive plastic guniting surface is arranged on the resistor body and is in contact with the second electric brush.
Preferably, the housing is provided with a wire outlet hole for leading out the signal wire, and the wire outlet hole is provided with an elastic sealing block with a hole; and/or the shell is provided with three mounting holes which are arranged in a delta shape, and the three mounting holes are all long waist-shaped and are arranged on the mounting edge of the shell; the mounting edge protrudes out of the body of the shell body.
Preferably, the shell and the end cover are made of light aluminum alloy materials; the rotating shaft, the first bearing and the second bearing are made of stainless steel materials.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is an overall sectional view of a long-life high-precision angle sensor of the present invention.
Fig. 2 is a schematic view of an installation structure of the rotating shaft and the brush in the present invention.
Fig. 3 is a schematic view of the structure of the brush in the present invention.
FIG. 4 is a schematic structural diagram of a resistor and a gold-plated middle guide ring according to the present invention.
Fig. 5 is a cross-sectional view of the structure of fig. 4.
In the figure: 1-resistor body, 2-gold-plated middle guide ring, 3-shell, 4-rotating shaft, 5-end cover, 6-first bearing, 7-second bearing, 8-first brush, 9-second brush, 10-signal wire, 11-brush fixing component, 12-fixed slip ring, 13-injection-molded bushing, 14-annular combination groove, 15-gasket, 16-pressing retaining ring, 17-first annular groove, 18-second annular groove, 19-wire outlet hole, 20-elastic sealing block, 21-mounting hole and 22-mounting edge.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example (b):
as shown in fig. 1, 4 and 5, the long-life high-precision angle sensor of the present invention includes a resistor body 1 as a sensor core member, wherein the resistor body 1 is a precision conductive plastic resistor body, is in a ring-shaped sheet shape, and is formed by a hot-press process; a resistor body 1 is embedded with a gold-plated middle guide ring 2 at medium pressure; the gold-plated middle guide ring 2 is placed on the running track of a brush in the angle sensor, so that the resistor body 1 and the brush form an angle sensing element, and the brush is made of a palladium-iridium alloy material. The effective electrical stroke of the resistor body 1 is designed according to the actual requirements of different steering engines so as to meet the requirements of the steering engines.
In the angle sensing element, the resistor body 1 is a precise conductive plastic resistor body, the working surface is smooth, the noise is low, and the electromagnetic compatibility is good; the medium conduction band adopts a hard gold-copper ring plating embedding technology, the wear resistance and the conductivity are far superior to those of the medium conduction band in the composite conductive paste in the prior art, and the service life is ultra-long; the electric brush is made of palladium-iridium alloy material, so that the working noise is low; the sensor made of the material has the advantages of high linear precision, extremely high resolution and long service life. When the electric steering engine works, a signal provided for a servo system is an accurate position signal, and the characteristics of repeated use, long time and repeated use of the unmanned aerial vehicle are met.
Meanwhile, the high-precision angle sensor with the long service life further comprises a shell 3 and a rotating shaft 4, one side of the shell 3 is connected with an end cover 5, and a first bearing 6, a second bearing 7 and a resistor body 1 are installed inside the shell 3; the rotating shaft 4 extends into the shell 3 through the end cover 5 and is rotatably connected with the first bearing 6 and the second bearing 7; the first bearing 6 is positioned on one side of the shell 3 close to the end cover 5, and the second bearing 7 is positioned on one side of the shell 3 far away from the end cover 5; a first brush 8 and a second brush 9 are mounted on the rotating shaft 4 between the first bearing 6 and the second bearing 7, and the first brush 8 and the second brush 9 jointly form a brush; the resistor body 1 is arranged on the rotating shaft 4 between the electric brush and the second bearing 7, the resistor body 1 is connected with the rotating shaft 4 through the conductive gold-plated middle guide ring 2, and specifically, the axis of the rotating shaft 4 is concentric with the axis of the gold-plated middle guide ring 2. Meanwhile, the first brush 8 is in sliding contact with the gold-plated middle guide ring 2, and the second brush 9 is in sliding contact with the corresponding surface of the resistor body 1; the resistor 1 is connected to a lead signal line 10.
Further, as shown in fig. 3, the first brush 8 and the second brush 9 are fixed to the stationary slip ring 12 by the brush fixing member 11, and the first brush 8 and the second brush 9 are respectively disposed on opposite sides of the stationary slip ring 12; as shown in fig. 2, an injection bush 13 is sleeved on the rotating shaft 4, and the fixed slip ring 12 is connected and fixed with the injection bush 13.
In the utility model, the injection bush 13 and the rotating shaft 4 are integrally injection molded, and the annular combination groove 14 is arranged on the combination surface of the rotating shaft 4 corresponding to the injection bush 13, so that the connection between the injection bush 13 and the rotating shaft 4 is more stable, the dead load is more than 500N, and the structure and the precision are superior to the connection of a pin or a key.
Furthermore, in the present invention, the outer sides of the first bearing 6 and the second bearing 7 are respectively provided with a gasket 15, and the gasket 15 is connected with the corresponding first bearing 6 and the second bearing 7 by a pressing retaining ring 16 in a pressing manner. Meanwhile, in order to fix the gasket 15 and the pressing retainer ring 16, the rotating shaft 4 has a first annular groove 17 and a second annular groove 18 corresponding to the positions where the gasket 15 and the pressing retainer ring 16 are installed.
In order to improve the conductive contact property and the wear resistance of the gold-plated middle guide ring 2, the gold-plated middle guide ring 2 is plated with hard gold, and a polished surface is formed and is contacted with the first electric brush 8; and a conductive plastic gunite surface is provided on the resistor 1 to contact the second brush 9.
In the utility model, the axial reasonable clearance between the rotating shaft 4 and the two bearings can be adjusted by selecting washers with different thicknesses so as to ensure the effective contact between the first electric brush 8 and the polished surface of the gold-plated middle guide ring 2 and the effective contact between the second electric brush 9 and the slurry spraying surface of the resistor body 1, and the contact force between the first electric brush 8 and the second electric brush 9 needs to be adjusted by an instrument so as to ensure the stability of an output signal.
Meanwhile, in order to ensure good contact output performance and reliable service life, the electric brush and the gold-plated middle guide ring 2 can be processed by adopting a proper special process.
As shown in fig. 1, the housing 3 of the sensor is further provided with an outlet hole 19 for leading out the signal line 10, and an elastic sealing block 20 with a hole is mounted on the outlet hole 19.
Further, in order to facilitate installation, the housing 3 of the present invention is provided with three mounting holes 21 arranged in a delta shape, and the three mounting holes 21 are long waist-shaped to facilitate installation and adjustment.
Wherein three mounting holes 21 in the housing 3 are arranged on a mounting rim 22 of the housing 3, which mounting rim 22 protrudes outside the body of the housing 3.
In particular, in the utility model, the shell 3 and the end cover 5 are made of light aluminum alloy materials, particularly 2A12 aluminum alloy, and have the characteristics of light weight, high strength and good processability.
The rotating shaft 4, the first bearing 6 and the second bearing 7 are made of stainless steel materials, and in order to improve the accuracy of the movement track of the electric brush, the bearing accuracy in the utility model adopts military grade.
In the utility model, the shell 3 and the end cover 5 are in threaded connection, namely, the connecting part of the shell 3 is provided with internal threads, and the connecting part of the end cover 5 is provided with external threads, so that threaded connection is realized.
Further, in order to improve the environmental adaptability, the outer shell 3 of the present invention is anodized.
The utility model has simple structure, ingenious conception, high position indication precision, stable working performance and super long working and storage life, effectively breaks the supply barrier of the existing electric steering engine angle sensor with high quality and low cost, and meets the requirements of high precision, high sensitivity, high reliability, long endurance and repeated use of various unmanned aerial vehicles and unmanned aerial vehicles.
Meanwhile, the utility model has a compact structure, has the characteristics of small structural elements, light weight, stable and reliable output signals, and can ensure the safety of the device in a specified use period and a specified use environment.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A long-life high-precision angle sensor is characterized by comprising a resistor body (1), wherein the resistor body (1) is in an annular sheet shape, and a gold-plated middle guide ring (2) is embedded in the resistor body; the resistor body (1) and the brush in the angle sensor form an angle sensing element.
2. The long-life and high-precision angle sensor according to claim 1, wherein the resistor body (1) is a precision conductive plastic resistor body formed by a hot-press process; the electric brush is made of palladium-iridium alloy materials.
3. A long-life and high-precision angle sensor according to claim 1 or 2, characterized by further comprising a housing (3) and a rotating shaft (4), wherein an end cover (5) is connected to one side of the housing (3), and a first bearing (6), a second bearing (7) and the resistor body (1) are mounted in the housing (3); the rotating shaft (4) extends into the shell (3) through the end cover (5) and is rotatably connected with the first bearing (6) and the second bearing (7); the first bearing (6) is positioned on one side of the shell (3) close to the end cover (5), and the second bearing (7) is positioned on one side of the shell (3) far away from the end cover (5); a first electric brush (8) and a second electric brush (9) are arranged on the rotating shaft (4) between the first bearing (6) and the second bearing (7), and the first electric brush (8) and the second electric brush (9) jointly form the electric brush; the resistor body (1) is arranged on the rotating shaft (4) between the electric brush and the second bearing (7), and the resistor body (1) is connected with the rotating shaft (4) through the gold-plated middle guide ring (2); the first electric brush (8) is in sliding contact with the gold-plated middle guide ring (2), and the second electric brush (9) is in sliding contact with the corresponding surface of the resistor body (1); the resistor body (1) is connected with a lead-out signal wire (10).
4. A long life and high precision angle sensor according to claim 3, characterized in that the axis of the rotating shaft (4) is concentric with the axis of the gold-plated middle guide ring (2).
5. A long-life and high-precision angle sensor according to claim 3, wherein said first brush (8) and said second brush (9) are fixed to a stationary slip ring (12) by a brush fixing member (11), and said first brush (8) and said second brush (9) are respectively disposed on opposite sides of said stationary slip ring (12); the rotating shaft (4) is sleeved with an injection molding bush (13), and the fixed sliding ring (12) is fixedly connected with the injection molding bush (13).
6. A long-life and high-precision angle sensor according to claim 5, characterized in that the joint surface of the rotating shaft (4) corresponding to the injection bush (13) is provided with an annular joint groove (14).
7. A long-life and high-precision angle sensor according to claim 3, characterized in that the outer sides of the first bearing (6) and the second bearing (7) are respectively provided with a gasket (15), and the gaskets (15) are tightly connected with the corresponding first bearing (6) and the second bearing (7) through a pressing retaining ring (16); and a first annular groove (17) and a second annular groove (18) are correspondingly arranged at the positions of the rotating shaft (4) where the gasket (15) and the pressing retaining ring (16) are correspondingly arranged.
8. A long-life high-precision angle sensor according to claim 3, wherein said gold-plated middle guide ring (2) is hard-gold-plated and formed into a polished surface to be in contact with said first brush (8); and a conductive plastic guniting surface is arranged on the resistor body (1) and is in contact with the second electric brush (9).
9. A long-life and high-precision angle sensor according to claim 3, characterized in that said housing (3) is provided with an outlet hole (19) for leading out said signal line (10), said outlet hole (19) is provided with an elastic sealing block (20) with a hole; and/or the shell (3) is provided with three mounting holes (21) which are arranged in a delta shape, the three mounting holes (21) are all long waist-shaped and are arranged on a mounting edge (22) of the shell (3); the mounting edge (22) protrudes out of the body of the shell (3).
10. A long-life and high-precision angle sensor according to claim 3, characterized in that said housing (3) and said end cap (5) are made of light aluminum alloy material; the rotating shaft (4), the first bearing (6) and the second bearing (7) are made of stainless steel materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122165005.8U CN215491521U (en) | 2021-09-08 | 2021-09-08 | Long-life high-precision angle sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122165005.8U CN215491521U (en) | 2021-09-08 | 2021-09-08 | Long-life high-precision angle sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215491521U true CN215491521U (en) | 2022-01-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122165005.8U Expired - Fee Related CN215491521U (en) | 2021-09-08 | 2021-09-08 | Long-life high-precision angle sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215491521U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114383496A (en) * | 2022-03-23 | 2022-04-22 | 四川永星电子有限公司 | Small-size large-stroke angular displacement sensor |
-
2021
- 2021-09-08 CN CN202122165005.8U patent/CN215491521U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114383496A (en) * | 2022-03-23 | 2022-04-22 | 四川永星电子有限公司 | Small-size large-stroke angular displacement sensor |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20220111 |
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| CF01 | Termination of patent right due to non-payment of annual fee |