CN112050728A - Novel high-temperature-resistant angular displacement sensor designed for assembly - Google Patents
Novel high-temperature-resistant angular displacement sensor designed for assembly Download PDFInfo
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- CN112050728A CN112050728A CN202010926935.8A CN202010926935A CN112050728A CN 112050728 A CN112050728 A CN 112050728A CN 202010926935 A CN202010926935 A CN 202010926935A CN 112050728 A CN112050728 A CN 112050728A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/30—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring angles or tapers; for testing the alignment of axes
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Abstract
The invention provides a novel high-temperature-resistant angular displacement sensor facing assembly design, which comprises a rotating shaft and an electric brush assembly, wherein a plurality of petal type platform assemblies are arranged on the rotating shaft, the petal type platform assemblies are arranged at intervals along the axial direction of the rotating shaft, and the adjacent petal type platform assemblies are arranged in a staggered manner; the electric brush assembly comprises a brush holder, wherein a petal groove matched with the petal type platform assembly in shape is formed in the brush holder, and the brush holder is fixedly connected with the petal type platform assembly. The angular displacement sensor provided by the invention can solve the possible quality problem of the angular displacement sensor in the production and use processes, the product qualification rate is improved, and the working reliability of the angular displacement sensor is also greatly improved; the device can be used for quickly and accurately measuring in a narrow and severe working environment, and the measurement reliability is improved.
Description
Technical Field
The invention belongs to the field of sensors, and particularly relates to a novel high-temperature-resistant rotary angular displacement sensor.
Background
An angular displacement sensor is commonly used in a servo system of a carrier rocket to measure the displacement of a piston rod and participate in feedback of a control system. Because the temperature around the engine of the carrier rocket is very high and the environment is severe, the angular displacement sensor not only needs to have output stability and reliability to ensure the control precision and the working reliability of a servo system, but also needs to have certain high temperature resistance.
Prior art angular displacement sensors still suffer from a number of problems during manufacture and use, for example: the outer guide wire of the sensor makes the rivet rotate slightly when bending after welding, so that the silver belt on the periphery of the rivet cracks; in the production process, when the framework is machined and/or rivets are riveted, the framework is cracked frequently, the qualification rate is extremely low, the production period is long, and the matching delivery of a servo system is influenced; when the product is used, internal stress remains when the annular structure is machined, and the nonmetal framework is used as a shell, so that the performance of the annular structure is easily influenced by external force when the annular structure is used, and the problem that the asymmetric resistance value of the sensor is out of tolerance is caused; the existing sensor structure is a circular inner wall type structure, only a mode of spraying a resistive film on the inner wall of a circular ring can be adopted, compared with a mode of spraying a resistive film on a plane by a linear displacement sensor, the initial linearity is lower, the linearity index requirement can be met only through multiple times of resistance linear trimming, and a small amount of qualified waste products cannot be trimmed; the connection silver belt is in an L shape and has a structure of right angle bending, which affects the reliability of the electrical connection. Therefore, the conventional angular displacement sensor cannot completely meet the requirements of high reliability of a carrier rocket servo system and adaptability to various severe working environments; there is a need for an improved angular displacement sensor that improves product yield and reliability of use.
Disclosure of Invention
In order to solve at least one of the above technical problems, the invention aims to provide an angular displacement sensor, which fundamentally solves the possible quality problem of products in the production and use processes, improves the product qualification rate, and greatly improves the working reliability of the angular displacement sensor; the device can be used for quickly and accurately measuring in a narrow and severe working environment, and the measurement reliability is improved.
In order to at least achieve one of the above purposes, the invention adopts the technical scheme that:
the invention provides an angular displacement sensor, which comprises a rotating shaft and an electric brush assembly, wherein a plurality of petal type platform assemblies are arranged on the rotating shaft, the petal type platform assemblies are arranged at intervals along the axial direction of the rotating shaft, and the adjacent petal type platform assemblies are arranged in a staggered manner; the electric brush assembly comprises a brush holder, wherein a petal groove matched with the petal type platform assembly in shape is formed in the brush holder, and the brush holder is fixedly connected with the petal type platform assembly.
Further, petal formula platform subassembly is a petal formula platform or petal formula platform subassembly is a plurality of petal formula platforms, and is a plurality of petal formula platform is along the same circumference interval arrangement of pivot.
Further, the brush holder is installed on the petal-type platform through screws; the electric brush assembly further comprises a conductive spring piece and brush wires; the conductive spring piece is fixed on the brush holder through a screw, and the two brush wires are respectively welded at two ends of the conductive spring piece.
The resistance ring assembly comprises a framework and a conductive strip, the conductive strip is printed on one side of the framework, and a resistance film layer is arranged on the conductive strip.
Further, the resistive ring assembly further comprises a resistive film; the resistive film is printed on one side of the framework, on which the conductive strips are printed; the framework is in a ring sheet shape, and the resistive film and the conductive strips are respectively in arc strip shapes and are concentrically and oppositely arranged with the framework.
Further, the number of the resistance ring assemblies, the number of the brush assemblies and the number of the petal-type platform assemblies are the same; the resistance ring assemblies and the electric brush assemblies are arranged in a crossed mode along the axial direction of the rotating shaft; the brush wires are abutted with the resistance film and the resistance film layer.
Further, the resistance ring assembly further comprises a hollow rivet and a signal outgoing line; the hollow rivets are respectively arranged at two ends of the resistive film and two ends of the conductive strip, the hollow rivets are fixed on the framework through flanging in a compression joint mode, and the signal outgoing lines are led out from the hollow rivets in a plug welding mode; and the signal lead-out wire is fixed by epoxy resin after being welded.
Further, the device also comprises an upper cover, a connecting ring and a lower cover; the connecting ring is arranged between the upper cover and the lower cover and is fixedly connected together through a pin to form an internal mounting cavity; the resistor ring assembly, the rotating shaft and the brush assembly are arranged in the mounting cavity.
Furthermore, a plurality of grooves are arranged on the circumferential direction of the connecting ring and at the matching connection part of the connecting ring and the lower cover; and after the resistance ring assembly is subjected to zero adjustment, dispensing and fixing are carried out at the groove.
Furthermore, the device also comprises a limiting structure, wherein the limiting structure comprises a limiting screw and a fan-shaped boss; the limiting screw is arranged in a mounting hole of the rotating shaft, and the mounting hole is arranged on the part of the rotating shaft extending out of the lower cover; the fan-shaped boss is arranged on the lower cover.
Compared with the prior art, the angular displacement sensor provided by the invention has the beneficial effects that:
the angular displacement sensor provided by the invention adopts an integrated rotating shaft provided with a plurality of petal type platforms, the petal type platforms are arranged at intervals along the circumferential direction and the axial direction of the rotating shaft, wherein the petal type platforms on the same circumferential direction form a petal type platform assembly at one stage, and the petal type platform assemblies of two adjacent stages adopt a staggered design. Through the petal groove that sets up and petal formula platform subassembly shape adaptation on the brush holder of brush subassembly, this kind of design can realize that brush subassembly top-down or pass the epaxial petal formula platform subassembly from bottom to top, compares the fixed mode of being connected of pivot and brush subassembly through the axle sleeve among the traditional angular displacement sensor, and the assembly of brush subassembly is more convenient, and the installation of a plurality of brush subassemblies of being convenient for.
The angular displacement sensor provided by the invention has the advantages that the resistance film layer is printed on the conductive bar, so that the lubrication effect can be realized, the output signal of the angular displacement sensor in the full stroke is free from burrs and jumping, the friction resistance and the vibration resistance of the brush wire in the contact process of the brush wire and the conductive bar are improved, the abrasion of the brush wire and the conductive bar in the working process is reduced, and the service life of the sensor is prolonged.
The angular displacement sensor provided by the invention can adopt a multi-redundancy modular design, and realizes a two-redundancy, three-redundancy or multi-redundancy structural design by changing the length of the rotating shaft and the number of the connecting rings, the resistance ring assemblies and the electric brush assemblies, thereby improving the reliability of the sensor. Meanwhile, the parts are designed in a standardized manner, the types of parts are reduced, and the production cost is reduced.
According to the angular displacement sensor provided by the invention, the plurality of grooves are formed in the circumferential direction of the connecting ring, and after the electric zero positions of the two groups of resistance ring assemblies are adjusted to be consistent, glue is dispensed and fixed at the grooves, so that the connecting ring is prevented from rotating in the circumferential direction in the working process, and the working reliability of the angular displacement sensor is improved.
The angular displacement sensor provided by the invention adopts the hollow rivet plug welding signal lead-out wire, is not easy to fall off at high temperature compared with the traditional metallized hole welding mode, and simultaneously adopts high-temperature resistant materials, thereby greatly improving the electrical connection reliability of products.
The angular displacement sensor provided by the invention adopts a design of strong zero position at the center, can better adapt to the control requirement of a servo system for a rocket, and improves the working reliability of products.
In a word, the angular displacement sensor provided by the invention solves the possible quality problem in the production and use process, improves the product qualification rate, and also greatly improves the working reliability of the angular displacement sensor; the device can carry out rapid and accurate measurement under the severe working environment with narrow space, and improves the measurement reliability.
Drawings
FIG. 1 is a schematic diagram of the internal structure of an angular displacement sensor in an embodiment of the present invention;
FIG. 2 is a schematic structural view of a resistor ring assembly in an embodiment of the invention;
FIG. 3 is a schematic view of another perspective of a resistor ring assembly according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a skeleton in an embodiment of the present invention;
FIG. 5 is a schematic structural diagram of another perspective of the frame in an embodiment of the present invention;
FIG. 6 is a schematic diagram of the structure of the angular displacement sensor lead-out wire in an embodiment of the present invention;
FIG. 7 is a schematic view of the internal structure of an angular displacement sensor from another perspective in an embodiment of the present invention;
FIG. 8 is a schematic structural diagram of a rotating shaft according to an embodiment of the present invention;
FIG. 9 is a schematic structural view of a brush assembly according to an embodiment of the present invention;
FIG. 10 is a schematic view showing the structure of a brush holder according to an embodiment of the present invention;
FIG. 11 is a schematic view of the structure of the brush assembly and the resistive ring assembly in accordance with an embodiment of the present invention;
fig. 12 is a schematic view of an angular displacement sensor in an embodiment of the present invention.
Wherein the reference numerals are as follows:
1-upper cover, 1-1-pin, 2-connecting ring, 2-1-second outlet hole, 3-lower cover, 3-1-bushing, 3-11-third outlet hole, 3-2-groove, 4-resistance ring component, 4-1-skeleton, 4-2-resistance film, 4-3-conductive strip, 4-4-hollow rivet, 4-5-signal outlet wire, 4-6-screw I, 5-rotating shaft, 5-0-petal platform, 5-1-bearing I, 5-2-bearing II, 5-3-gasket, 6-brush component, 6-1-brush holder, 6-2-conductive spring piece, 6-3-brush wire, 6-4-screw II, 6-5-screw III, 7-1-limiting screw and 7-2-fan-shaped boss.
Detailed Description
In order to make the technical solutions of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to specific examples. Note that the following described embodiments are illustrative only for explaining the present invention, and are not to be construed as limiting the present invention. The examples, where specific techniques or conditions are not indicated, are to be construed according to the techniques or conditions described in the literature in the art or according to the product specifications.
In the description of the present invention, it is to be understood that the terms "first", "second" and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Hereinafter, the angular displacement sensor provided by the present invention will be described in detail by specific embodiments:
as shown in fig. 1, the angular displacement sensor provided by the present invention comprises an upper cover 1, a connection ring 2, a lower cover 3, a resistance ring assembly 4, a rotation shaft 5, a brush assembly 6, and other components.
The connecting ring 2 is arranged between the upper cover 1 and the lower cover 3, and the upper cover 1, the connecting ring 2 and the lower cover 3 are fixedly connected together through a pin 1-1 to form an internal installation cavity. The resistance ring assembly 4, the rotating shaft 5 and the brush assembly 6 are arranged in the mounting cavity. The upper cover 1, the connecting ring 2 and the lower cover 3 are all made of metal materials, the main easily-damaged functional parts, such as the resistance ring component 4 and the electric brush component 6, are arranged inside the product, and the easily-damaged parts can be effectively prevented from being broken down in the transportation process to influence the working performance of the product.
As shown in fig. 2-7, the resistance ring assembly 4 includes a frame 4-1, a resistance film 4-2, a conductive strip 4-3, a hollow rivet 4-4, and a signal outgoing line 4-5. The framework 4-1 is in a ring sheet shape as a whole, and the resistive film 4-2 and the conductive strips 4-3 are printed on one side of the framework 4-1. The resistive film 4-2 and the conductive strip 4-3 are respectively in the shape of a circular arc strip and are concentrically arranged relative to the framework 4-1. Hollow rivets are arranged at the two ends of the resistance film 4-2 and the conductive strip 4-3. The hollow rivet 4-4 is fixed on the framework 4-1 through flanging and crimping, the signal lead-out wire 4-5 is inserted and welded from the hollow rivet 4-4 and led out, a rivet hole is filled with soldering tin during welding, a proper high-temperature-resistant solder is selected during welding, the solidus temperature of the selected solder is more than 1.5 times of the working temperature, the angular displacement sensor can still normally work at the high temperature of 200 ℃, the angular displacement sensor is fixed by epoxy resin after welding, compared with the traditional angular displacement sensor, the mode that the signal lead-out wire is led out through the metalized hole welding is adopted, the welding mode provided by the application is not easy to fall off at the high temperature, and the electrical connection reliability of a product is greatly improved.
The other side of the framework 4-1 is provided with a wiring groove, and an outer guide wire of the signal leading-out wire 4-5 is fixed in the wiring groove through the spot-fixing epoxy resin, so that the phenomenon that the hollow rivet 4-4 generates micro rotation when the outer guide wire is bent after welding, the silver belt on the periphery of the hollow rivet 4-4 generates cracks, and the signal output of the angular displacement sensor is abnormal is avoided. Because the servo system space is narrow and small, the installation size is limited, the maximum outer diameter of the resistance ring assembly 4 is limited by the size of the shell of the sensor, in order to avoid interference with the installation screws of the upper cover 1, the lower cover 3 and the connecting ring 2 and the wire holes of the angular displacement sensor, a plurality of fan-shaped structures are also arranged on the other side of the framework 4-1, are distributed in a staggered mode with the installation screw holes of the upper cover 1, the lower cover 3 and the connecting ring 2 and the wire holes of the angular displacement sensor and are fixed through screws, the installation space is saved, and meanwhile, the high reliability of the sensor is guaranteed.
In the present embodiment, two resistance ring assemblies 4 are provided, and the two resistance ring assemblies 4 are fixed to the connection ring 2 and the lower cap 3 by screws one 4 to 6, respectively. After being led out from a first wire outlet hole on the framework 4-1, a signal lead-out wire 4-5 of the resistance ring assembly 4 is led out through a second wire outlet hole 2-1 of the connecting ring 2 and/or a third wire outlet hole 3-11 arranged on a bushing 3-1 of the lower cover 3, so that the electrical reliability of the sensor is greatly improved.
As shown in fig. 8, the rotating shaft 5 provided by the invention is an integrated rotating shaft, and the rotating shaft 5 is provided with a petal-shaped platform 5-0. A plurality of petal formula platforms are arranged along the circumference and the axial interval of pivot 5, and wherein one-level petal formula platform subassembly is constituteed to the same petal formula platform in circumference, is provided with two-stage petal formula platform subassembly in this embodiment. The first stage petal type platform assembly and the second stage petal type platform assembly are designed in a staggered mode.
As shown in fig. 9-11, the brush assembly 6 includes a brush holder 6-1, a conductive spring plate 6-2, and brush filaments 6-3. The brush holder 6-1 is in a disc shape, and the middle part is provided with a petal groove matched with the petal type platform assembly in shape. The brush holder 6-1 is arranged on a petal type platform of the rotating shaft 5 through a second screw 6-4. The conductive spring piece 6-2 is fixed on the brush holder 6-1 through a screw III 6-5, and the two brush wires 6-3 are welded at two ends of the conductive spring piece 6-2 through acid-free brazing.
Two brush assemblies 6 are provided in this embodiment. Because the brush holder 6-1 is provided with the petal grooves matched with the petal type platform assemblies in shape, and the two stages of petal type platform assemblies on the rotating shaft 5 adopt the staggered design, the design mode can realize that the electric brush assembly 6 passes through the petal type platform assemblies on the rotating shaft 5 from top to bottom or from bottom to top to carry out the screw fixing installation. When one of the signals is abnormal in output, all the brush holder assemblies do not need to be disassembled and assembled, and only the brush assemblies with abnormal output are subjected to operations such as screw locking and disassembling, so that troubleshooting can be realized. Compare the fixed connection mode through the axle sleeve between brush subassembly among the traditional angular displacement sensor and the pivot, the assembly part of this application is few, and the assembly process is simple and convenient, a plurality of brush holder subassemblies of easy to assemble.
Two brush assemblies 6 are arranged in a cross arrangement with two resistive ring assemblies 4. The two brush filaments 6-3 in each brush assembly 6 abut the resistive film 4-2 and the conductive strip 4-3, respectively, of the resistive ring assembly 4 adjacent thereto. The electric brush assembly 6 is driven by the rotation of the rotating shaft 5 to rotate along with the rotating shaft 5, and the brush wires rotate on the resistive film 4-2 to generate different voltage signals to be output, so that the detection of the rotating angle is realized.
Due to the contact pressure between the brush filaments 6-3 and the conductive strips 4-3 during operation, the present embodiment prints a resistive film layer on the conductive strips 4-3 of the resistive ring assembly. The resistance film layer can play a lubricating role, the output signal of the angular displacement sensor in the full stroke is free of burrs and jumping, the friction resistance of the brush wire and the conducting bar in the contact process and the vibration resistance of the brush wire are improved, the abrasion of the brush wire and the conducting bar in the working process is reduced, and the service life of the sensor is prolonged.
As shown in fig. 12, bearing grooves are further provided on the upper cover 1 and the lower cover 3, and bearings are provided in the bearing grooves. One end of the rotating shaft 5 is rotatably supported in the upper cover 1 through a bearing one 5-1, and the other end thereof passes through the lower cover 3 and is rotatably supported in the lower cover 3 through a bearing two 5-2. A shaft shoulder is further arranged at the other end of the rotating shaft 5 and is abutted and fixed with the inner ring of the second bearing; and a gasket 5-3 is arranged between a bearing inner ring of the bearing I and the rotating shaft 5, so that an inter-shaft gap is eliminated, and abrasion caused by change of the compression amount of the brush wires due to axial movement of the rotating shaft is prevented.
The upper cover 1, the connecting ring 2 and the lower cover 3 are fixed through three pins. After the electric zero of the resistance ring assembly 4 is zero, the three pins can be locked. A plurality of grooves 3-2 are formed in the circumferential direction of the connecting ring 2 and at the matched connection position with the lower cover 3, after the electric zero positions of the two groups of resistance ring assemblies 4 are adjusted to be consistent, glue is dispensed and fixed at the grooves, the connecting ring 2 is prevented from rotating in the circumferential direction in the working process, and the working reliability of the angular displacement sensor is improved.
In order to meet the control requirement of a rocket servo system, the center position of the resistance ring assembly 4 adopts a strong zero position mode, the angular displacement sensor for the rocket servo system mostly works near zero voltage, and the center position adopts the strong zero position design, so that when output abnormality occurs at one end of a positive end or a negative end of power supply voltage, the other end can still output normally, and the working reliability of products is improved.
The angular displacement sensor of the present embodiment is further provided with a limit structure. The limiting structure comprises a limiting screw 7-1 and a fan-shaped boss 7-2. A mounting hole is formed in the part, extending out of the lower cover 3, of the rotating shaft 5, and a limit screw is arranged in the mounting hole; the fan-shaped boss is arranged on the outer side of the lower cover 3. Through the cooperation of stop screw and fan-shaped boss, can realize that the sensor is spacing, can prevent that the sensor from excessively rotating in transportation, installation, sensor zero setting process axis. After the sensor is transported and installed and the sensor is zeroed, the angular displacement sensor cannot exceed the designed measuring range during working due to the displacement limit of a piston rod of the servo system, and the limit screw can be detached. The locating pin that current angular displacement sensor was inside usually carries on spacingly with the sensor, and the locating pin is many through gluing fixed mounting in the pivot, because the locating pin external diameter is little, probably has to receive external force or operating personnel in the transportation at zero setting in-process misoperation, leads to axle or locating pin to take place the fracture, produces the redundancy, leads to the unusual problem of sensor work, and the limit structure that this application provided can avoid above-mentioned problem completely.
In other embodiments, the angular displacement sensor can adopt a multi-redundancy modular design, and the reliability of the sensor can be improved by changing the length of the rotating shaft 5 and the number of the connecting ring 2, the resistance ring assembly 4 and the brush assembly 6 to realize a two-redundancy, three-redundancy or multi-redundancy structure. Petal type platform components on the rotating shaft 5 can be correspondingly set to be more than two stages, and each stage of petal type platform components and the adjacent stage of petal type platform components are arranged in a staggered mode. The invention adopts multi-redundancy modular design, thus reducing the types of parts; through setting up standardized, universalization parts such as resistance ring subassembly, brush subassembly, pivot, hollow rivet, realized the standardized design of spare part, greatly reduced the manufacturing cost of sensor.
Compared with the prior art, the angular displacement sensor provided by the invention has the beneficial effects that:
the angular displacement sensor provided by the invention adopts an integrated rotating shaft provided with a plurality of petal type platforms, the petal type platforms are arranged at intervals along the circumferential direction and the axial direction of the rotating shaft, wherein the petal type platforms on the same circumferential direction form a petal type platform assembly at one stage, and the petal type platform assemblies of two adjacent stages adopt a staggered design. Through the petal groove that sets up and petal formula platform subassembly shape adaptation on the brush holder of brush subassembly, this kind of design can realize that brush subassembly top-down or pass the epaxial petal formula platform subassembly from bottom to top, compares the fixed mode of being connected of pivot and brush subassembly through the axle sleeve among the traditional angular displacement sensor, and the assembly of brush subassembly is more convenient, and the installation of a plurality of brush subassemblies of being convenient for.
The angular displacement sensor provided by the invention has the advantages that the resistance film layer is printed on the conductive bar, so that the lubrication effect can be realized, the output signal of the angular displacement sensor in the full stroke is free from burrs and jumping, the friction resistance and the vibration resistance of the brush wire in the contact process of the brush wire and the conductive bar are improved, the abrasion of the brush wire and the conductive bar in the working process is reduced, and the service life of the sensor is prolonged.
The angular displacement sensor provided by the invention can adopt a multi-redundancy modular design, and realizes a two-redundancy, three-redundancy or multi-redundancy structural design by changing the length of the rotating shaft and the number of the connecting rings, the resistor components and the electric brush components, thereby improving the reliability of the sensor. Meanwhile, the parts are designed in a standardized manner, the types of parts are reduced, and the production cost is reduced.
According to the angular displacement sensor provided by the invention, the plurality of grooves are formed in the circumferential direction of the connecting ring, and after the electric zero positions of the two groups of resistance ring assemblies are adjusted to be consistent, glue is dispensed and fixed at the grooves, so that the connecting ring is prevented from rotating in the circumferential direction in the working process, and the working reliability of the angular displacement sensor is improved.
The angular displacement sensor provided by the invention adopts the hollow rivet plug welding signal lead-out wire, is not easy to fall off at high temperature compared with the traditional metallized hole welding mode, and simultaneously adopts high-temperature resistant materials, thereby greatly improving the electrical connection reliability of products.
The angular displacement sensor provided by the invention adopts a design of strong zero position at the center, can better adapt to the control requirement of a servo system for a rocket, and improves the working reliability of products.
In a word, the invention provides the angular displacement sensor with simple structure and strong practicability, and the angular displacement sensor has wide application prospect.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Claims (10)
1. The novel high-temperature-resistant angular displacement sensor comprises a rotating shaft and an electric brush assembly, and is characterized in that a plurality of petal type platform assemblies are arranged on the rotating shaft, are arranged at intervals along the axial direction of the rotating shaft, and are arranged in a staggered mode; the electric brush assembly comprises a brush holder, wherein a petal groove matched with the petal type platform assembly in shape is formed in the brush holder, and the brush holder is fixedly connected with the petal type platform assembly.
2. The angular displacement sensor of claim 1, wherein the petal platform assembly is one petal platform or the petal platform assembly is a plurality of petal platforms, and the plurality of petal platforms are arranged at intervals along a same circumference of the rotating shaft.
3. The angular displacement sensor of claim 2, wherein the brush holder is mounted on the petal platform by screws; the electric brush assembly further comprises a conductive spring piece and brush wires; the conductive spring piece is fixed on the brush holder through a screw, and the two brush wires are respectively welded at two ends of the conductive spring piece.
4. The angular displacement sensor of claim 3, further comprising a resistive ring assembly comprising a frame and a conductive strip printed on one side of the frame, the conductive strip having a resistive film layer disposed thereon.
5. The angular displacement sensor of claim 4, wherein the resistive ring assembly further comprises a resistive film; the resistive film is printed on one side of the framework, on which the conductive strips are printed; the framework is in a ring sheet shape, and the resistive film and the conductive strips are respectively in arc strip shapes and are concentrically and oppositely arranged with the framework.
6. The angular displacement sensor of claim 5, wherein the number of resistive ring assemblies, brush assemblies, and petal platform assemblies are the same; the resistance ring assemblies and the electric brush assemblies are arranged in a crossed mode along the axial direction of the rotating shaft; the brush wires are abutted with the resistance film and the resistance film layer.
7. The angular displacement sensor of claim 6, wherein the resistive ring assembly further comprises a hollow rivet and a signal lead-out; the hollow rivets are respectively arranged at two ends of the resistive film and two ends of the conductive strip, the hollow rivets are fixed on the framework through flanging in a compression joint mode, and the signal outgoing lines are led out from the hollow rivets in a plug welding mode; and the signal lead-out wire is fixed by epoxy resin after being welded.
8. The angular displacement sensor of claim 7, further comprising an upper cover, a connecting ring, and a lower cover; the connecting ring is arranged between the upper cover and the lower cover and is fixedly connected together through a pin to form an internal mounting cavity; the resistor ring assembly, the rotating shaft and the brush assembly are arranged in the mounting cavity.
9. The angular displacement sensor of claim 8, wherein a plurality of grooves are provided in the circumferential direction of the connection ring at the fitting connection with the lower cover; and after the resistance ring assembly is subjected to zero adjustment, dispensing and fixing are carried out at the groove.
10. The angular displacement sensor of claim 9, further comprising a limit structure comprising a limit screw and a sector boss; the limiting screw is arranged in a mounting hole of the rotating shaft, and the mounting hole is arranged on the part of the rotating shaft extending out of the lower cover; the fan-shaped boss is arranged on the lower cover.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112762816A (en) * | 2020-12-25 | 2021-05-07 | 兰州飞行控制有限责任公司 | Redundancy angular displacement sensor with self-isolation blocking fault and use method |
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