Angular displacement sensor and measurement system

Abstract

The present invention provides an angular displacement sensor and a measurement system that can simplify the design and reduce costs. 【Solution means】The angular displacement sensor includes a main body housing 100, an induction circuit board 200, and a rotor assembly 300. A rotor assembly accommodation chamber 110 is provided in the main body housing. The induction circuit board is mounted inside the main body housing. The rotor assembly includes a rotor body 310 and a magnet 320. The rotor body is rotatably mounted in the rotor assembly accommodation chamber. The magnet is installed between the rotor body and the induction circuit board and is fixedly attached to one end of the rotor body.

Description

Technical Field

[0001] The present invention belongs to the technical field of measurement, and specifically relates to an angular displacement sensor and a measurement system.

Background Art

[0002] An angular displacement sensor, also called an angle displacement sensor, is a type of displacement sensor that uses a contact or non-contact design. Compared with other conventional angular displacement measuring devices such as synchronous analyzers and potentiometers, the angular displacement sensor effectively improves long-term reliability, and its unique design enables it to guarantee measurement accuracy with a structure that does not use easily worn moving parts such as slip rings, vanes, contact cursors, and brushes.

[0003] Conventional angular displacement sensors perform small-angle measurements with a relatively complex external design, have a low IP protection level, and are not suitable for use in harsh environments. Also, due to the design of a separate structure, the measurement accuracy is often relatively low, the adjustment time is long, and the cost is high.

Summary of the Invention

Problems to be Solved by the Invention

[0004] An object of the present invention is to provide an angular displacement sensor and a measurement system that can simplify the design and achieve the effect of cost reduction.

Means for Solving the Problems

[0005] In a first aspect, the angular displacement sensor according to the present invention includes a main body housing, an induction circuit board, and a rotor assembly. A rotor assembly accommodation chamber is provided in the main body housing. The induction circuit board is attached inside the main body housing. The rotor assembly includes a rotor body and a magnet. The rotor body is rotatably attached in the rotor assembly accommodation chamber. The magnet is installed between the rotor body and the induction circuit board, and the magnet is fixedly attached to one end of the rotor body.

[0006] In the above realization process, the corner displacement sensor is provided with a rotor assembly accommodation chamber in the main body housing, and the rotor body is directly rotatably mounted in the rotor assembly accommodation chamber, so that the attachment of the rotor body to the rotor assembly accommodation chamber is simple and easy. In addition, a magnet is installed between the rotor body and the induction circuit board, and the magnet is fixedly attached to the end of the rotor body close to the induction circuit board, so that the attachment structure can be simplified on the premise of not impairing the measurement accuracy of the rotor assembly, and the manufacturing cost can be suppressed. Therefore, the corner displacement sensor can realize the effect of simplifying the design and suppressing the cost.

[0007] Furthermore, the rotor assembly further includes an elastic component, and one end of the elastic component is fixedly connected to the rotor assembly accommodation chamber, and the other end is fixedly connected to the rotor body.

[0008] In the above realization process, during the rotation process of the rotor body, the elastic component is switched between the natural state and the stretched state, and the rotor body can return to the initial position under the action of the elastic component.

[0009] Furthermore, the elastic component is a spring member, the spring member is annularly installed outside the rotor body, one end is fixedly connected to the rotor assembly accommodation chamber, and the other end is fixedly connected to the rotor body.

[0010] Furthermore, the spring member is a torsion spring.

[0011] In the above realization process, for the torsion spring, two ends are respectively fixed to the rotor assembly accommodation chamber and the rotor body. When the rotor body rotates around the center of the torsion spring, torque or rotational force is generated in the torsion spring, thereby returning the rotor body to the initial position. The torsion spring can store or release angular kinetic energy, or can fix the rotor body 310 statically by the rotational moment arm around the central axis of the spring body.

[0012] Furthermore, the main body housing includes an upper housing and a lower housing. The upper housing is provided with the rotor assembly accommodation chamber. The lower housing and the upper housing are assembled together. A metal terminal is installed in the lower housing, and the metal terminal is electrically connected to the induction circuit board.

[0013] In the above realization process, through the electrical connection between the metal terminal and the induction circuit board, the electrical signal of the induction circuit board is transmitted to other devices to realize the output of the angular displacement induction signal.

[0014] Furthermore, a shield cover is selectively provided on the upper housing or the lower housing. The shield cover is a metal shield cover for preventing interference from external magnetic fields.

[0015] Furthermore, the angular displacement sensor further includes a first sealing component, and the lower housing and the upper housing are sealed by the first sealing component.

[0016] In the above realization process, by performing a sealing assembly on the lower housing and the upper housing with the first sealing component, excessive contact between the metal terminal and air can be prevented, and an anti-rust effect on the metal terminal can be achieved.

[0017] Furthermore, the rotor assembly further includes a rotor cover, and the rotor cover is attached to the rotor assembly accommodation chamber so as to cover the rotor assembly accommodation chamber.

[0018] Furthermore, the rotor assembly further includes a second sealing component, and the rotor cover is sealingly attached to the rotor assembly accommodation chamber by the second sealing component.

[0019] In the above implementation process, the rotor cover is attached to the rotor assembly housing so as to cover the rotor assembly housing, thereby sealing and attaching the rotor assembly inside the space formed by the rotor cover and the rotor assembly housing, protecting the magnet and the elastic component from contact with the outside, having the effects of waterproofing, dustproofing, and rust prevention, effectively extending the service life of the magnet and the elastic component, and being able to extend the service life of the angular displacement sensor.

[0020] In a second aspect, the angular displacement sensor according to the present invention includes a main body housing, an induction circuit board, a metal brush, and a rotor assembly. A rotor assembly housing is provided in the main body housing, a metal terminal is installed on the main body housing, the induction circuit board is attached inside the main body housing, the rotor assembly is rotatably installed in the rotor assembly housing of the main body housing, the metal brush is fixedly attached to the rotor assembly, and the metal brush is electrically connected to the induction circuit board.

[0021] In the above implementation process, different from the non-contact angle sensor according to the first aspect, the angular displacement sensor is a contact angle sensor.

[0022] In a third aspect, the present invention provides a measurement system including any one of the angular displacement sensors according to the first aspect.

[0023] Other features and advantages of the present invention will be described in the following part, and some of them can be inferred from the description in the specification or understood unambiguously, or understood by implementing the above technology according to the present invention.

[0024] To make the above objects, features, and advantages of the present invention clearer, the following preferred embodiments will be given and described in detail with reference to the drawings.

[0025] To more clearly explain the technical solutions of the embodiments in this invention, the drawings necessary for the description of the embodiments are briefly explained below. The drawings to be explained only show some embodiments of the present invention and do not limit the scope. Those skilled in the art can obtain other related drawings based on these drawings without using inventive capabilities.

Brief Explanation of Drawings

[0026]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Modes for Carrying Out the Invention

[0027] Hereinafter, while referring to the drawings used in the embodiments of the present invention, the technical solutions in the embodiments of the present invention are clearly and completely described. It goes without saying that the described embodiments are only some embodiments of the present invention and not all embodiments. The components in the embodiments of the present invention shown using the drawings here can be arranged and designed in various ways. Therefore, the following detailed description of the embodiments of the present invention shown in the drawings only shows the selected embodiments of the present invention and does not limit the scope of the present invention to be protected. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without using inventive capabilities also belong to the protection scope of the present invention.

[0028] In the present invention, the directions or positional relationships expressed by terms such as "up", "down", "left", "right", "front", "rear", "top", "bottom", "inside", "outside", "middle", "vertical", "horizontal", "lateral direction" and "longitudinal direction" are based on the drawings. These terms are merely for better explaining the present invention and its embodiments, and do not limit that the corresponding device, element or component has a specific direction or is configured and operated in a specific direction.

[0029] And, in addition to being able to indicate a direction or positional relationship, some of the above terms may also be used to represent other meanings. For example, the term "up" may, in some cases, be used to indicate a specific dependency or connection relationship. Those skilled in the art can understand the specific meanings of these terms in the present invention according to the specific situation.

[0030] Also, the terms "attachment", "installation", "provided", "connection" and "association" should be understood in a broad sense. For example, it may be a fixed connection, a removable connection, or an integral connection. And it may be a mechanical connection or an electrical connection. Also, it may be directly connected, indirectly connected via an intermediate object, or the interiors of two devices, elements or components may communicate with each other. Those skilled in the art can understand the specific meanings of the above terms in the present invention according to the specific situation.

[0031] Also, terms such as "first" and "second" are merely for distinguishing different devices, elements or components (the specific types or structures may be the same or different), and do not explicitly or implicitly indicate the relative importance or number of the corresponding devices, elements or components. Unless otherwise specified, "a plurality" means "two or more".

[0032] The angular displacement sensor and measurement system according to the embodiments of the present invention can be applied to the process of measuring angular displacement. In the angular displacement sensor, a rotor assembly accommodation chamber is provided in the main body housing, and the rotor main body is directly rotatably mounted in the rotor assembly accommodation chamber, so that the attachment of the rotor main body to the rotor assembly accommodation chamber is simple and easy. In addition, a magnet is installed between the rotor main body and the induction circuit board, and the magnet is fixedly attached to the end of the rotor main body close to the induction circuit board. Therefore, on the premise of not impairing the measurement accuracy of the rotor assembly, the attachment structure can be simplified and the manufacturing cost can be reduced. Therefore, the angular displacement sensor can simplify the design and achieve the effect of cost reduction.

[0033] Referring to FIGS. 1 to 4, FIG. 1 is a schematic exploded view of a first type of angular displacement sensor according to an embodiment of the present invention, FIG. 2 is a schematic configuration view of the first type of angular displacement sensor according to an embodiment of the present invention as viewed from a first angle, FIG. 3 is a schematic configuration view of the first type of angular displacement sensor according to an embodiment of the present invention as viewed from a second angle, and FIG. 4 is a schematic cross-sectional view of the first type of angular displacement sensor according to an embodiment of the present invention. The angular displacement sensor includes a main body housing 100, an induction circuit board 200, and a rotor assembly 300.

[0034] Exemplarily, a rotor assembly accommodation chamber 110 is provided in the main body housing 100, and the induction circuit board 200 is mounted inside the main body housing 100. By mounting the induction circuit board 200 inside the main body housing 100, the induction circuit board 200 can be protected from erosion or interference by water vapor in the external environment.

[0035] Exemplarily, the rotor assembly 300 includes a rotor main body 310 and a magnet 320. The rotor main body 310 is rotatably mounted in the rotor assembly accommodation chamber 110, the magnet 320 is installed between the rotor main body 310 and the induction circuit board 200, and is fixedly attached to one end of the rotor main body 310.

[0036] The shape of the magnet 320 can be rectangular, circular, etc. This is only exemplary and does not limit the shape of the magnet 320.

[0037] Exemplarily, the rotor body 310 and the magnet 320 are the main components of the rotor assembly 300. When the rotor body 310 rotates, an electrical signal is generated by the cooperation of the rotor assembly 300 and the induction circuit board 200, thereby realizing the inductive measurement of the angular displacement.

[0038] In some embodiments, the angular displacement sensor is provided with a rotor assembly accommodation chamber 110 in the body housing 100, and the rotor body 310 is directly rotatably mounted in the rotor assembly accommodation chamber 110. Therefore, the attachment of the rotor body 310 to the rotor assembly accommodation chamber 110 is simple and easy. In addition, the magnet 320 is installed between the rotor body 310 and the induction circuit board 200, and the magnet 320 is fixedly attached to the end of the rotor body 310 close to the induction circuit board 200. Therefore, on the premise of not impairing the measurement accuracy of the rotor assembly 300, the attachment structure can be simplified and the manufacturing cost can be suppressed. Therefore, the angular displacement sensor can achieve the effect of simplifying the design and suppressing the cost.

[0039] Exemplarily, the rotor assembly 300 further includes an elastic component 330. One end of the elastic component 330 is fixedly connected to the rotor assembly accommodation chamber 110, and the other end is fixedly connected to the rotor body 310.

[0040] Exemplarily, during the rotation process of the rotor body 310, the elastic component 330 is switched between the natural state and the stretched state, and the rotor body 310 can return to the initial position under the action of the elastic component 330.

[0041] Exemplarily, the elastic component 330 is a spring member. The spring member is annularly mounted outside the rotor body 310. One end is fixedly connected to the rotor assembly accommodation chamber 110, and the other end is fixedly connected to the rotor body 310.

[0042] Exemplarily, the spring member is a torsion spring. The torsion spring has two ends fixed to the rotor assembly housing chamber 110 and the rotor body 310 respectively. When the rotor body 310 rotates around the center of the torsion spring, torque or rotational force is generated in the torsion spring, thereby returning the rotor body 310 to the initial position. The torsion spring can store or release angular kinetic energy, or can statically fix the rotor body 310 by a rotational moment arm around the central axis of the spring body.

[0043] Exemplarily, the main body housing 100 includes an upper housing 120 and a lower housing 130. The rotor assembly housing chamber 110 is provided in the upper housing 120, and the lower housing 130 and the upper housing 120 are assembled together. A metal terminal 140 is installed in the lower housing 130, and the metal terminal 140 is electrically connected to the induction circuit board 200.

[0044] Exemplarily, through the electrical connection between the metal terminal 140 and the induction circuit board 200, the electrical signal of the induction circuit board 200 is transmitted to other devices to realize the output of the angular displacement induction signal.

[0045] Exemplarily, a shield cover 160 is selectively provided on the upper housing 120 or the lower housing 130, and the shield cover 160 is a metal upper housing for preventing interference from an external magnetic field.

[0046] Exemplarily, the angular displacement sensor further includes a first sealing component 150, and the lower housing 130 and the upper housing 120 are sealed by the first sealing component 150.

[0047] Exemplarily, by performing a sealing assembly on the lower housing 130 and the upper housing 120 with the first sealing component 150, excessive contact between the metal shield cover and the metal terminal and air can be prevented, and it has an anti-rust effect on the metal shield cover and the metal terminal 140.

[0048] Exemplarily, the rotor assembly 300 further includes a rotor cover 340, and the rotor cover 340 is attached to the rotor assembly housing chamber 110 so as to cover the rotor assembly housing chamber 110.

[0049] Exemplarily, by attaching the rotor cover 340 to the rotor assembly housing chamber 110 so as to cover the rotor assembly housing chamber 110, the rotor assembly 300 is hermetically attached inside the space formed by the rotor cover 340 and the rotor assembly housing chamber 110, and the magnet 320 and the elastic component 330 can be protected from contact with the outside, having the effects of waterproofing, dustproofing, and rust prevention, and can effectively extend the service life of the magnet 320 and the elastic component 330, and can extend the service life of the angular displacement sensor.

[0050] Exemplarily, the rotor assembly 300 further includes a second sealing component, and the rotor cover 340 is hermetically attached to the rotor assembly housing chamber 110 via the second sealing component.

[0051] Optionally, the second sealing component is a sealing ring.

[0052] In some embodiments, for the sealing between the rotor cover 340 and the rotor assembly housing chamber 110, in addition to using a sealing ring, many means such as applying oil or wax, or ultrasonic welding can be used, and these are merely examples and not limiting. That is, other types of sealing methods can be selected for the sealing between the rotor cover 340 and the rotor assembly housing chamber 110 according to specific requirements.

[0053] Exemplarily, the embodiments of the present invention provide a measurement system including the angular displacement sensor shown in FIGS. 1 to 3.

[0054] In some embodiments, a shield cover is installed inside the main body housing 100, and the shield cover is aligned with the lower housing 130 or the upper housing 120, thereby preventing excessive contact between the metal shield cover and air, preventing corrosion of the metal shield cover, and obtaining an anti-rust effect. Since the shield cover is installed inside the main body housing 100, it is easy to install.

[0055] In some embodiments, sealing is performed between the main body housing 100 and the rotor assembly accommodation chamber 110, and sealing is also performed between the rotor assembly accommodation chamber 110 and the rotor cover 340. Many means can be used for the sealing method, such as installing a seal ring, applying oil or wax, ultrasonic welding, etc., and these are only examples and not limiting.

[0056] By performing sealing between the main body housing 100 and the rotor assembly accommodation chamber 110, a waterproof and dustproof effect can be obtained, and the protection level of the angular displacement sensor can be made IP67 or higher.

[0057] By performing sealing between the rotor assembly accommodation chamber 110 and the rotor cover 340, the magnet 320 and the elastic component 330 can be protected from contact with the outside, having waterproof, dustproof, and anti-rust effects, effectively extending the service life of the magnet 320 and the elastic component 330, and extending the service life of the angular displacement sensor.

[0058] Exemplarily, the angular displacement sensors shown in FIGS. 1 to 4 are non-contact angular displacement sensors.

[0059] Referring to FIGS. 5 and 6, FIG. 5 is a schematic exploded view of a second type of angular displacement sensor according to an embodiment of the present invention, and FIG. 6 is a schematic cross-sectional view of a second type of angular displacement sensor according to an embodiment of the present invention. What is shown in FIGS. 5 and 6 is a contact type angular displacement sensor, and the angular displacement sensor includes a main body housing 100, an induction circuit board 200, a metal brush 400, and a rotor assembly 300.

[0060] Exemplarily, a rotor assembly housing chamber 110 is provided in the main body housing 100, and metal terminals are installed in the main body housing 100.

[0061] The induction circuit board 200 is attached inside the main body housing 100.

[0062] Exemplarily, the rotor assembly 300 is rotatably installed in the rotor assembly housing chamber 110 of the main body housing 100. The metal brush 400 is fixedly attached to the rotor assembly 300 and is electrically connected to the induction circuit board 200. The metal brush generates an electrical signal according to the rotation angle of the rotor assembly 300.

[0063] Different from the non-contact angle sensor shown in FIGS. 1 to 4, the angular displacement sensor shown in FIGS. 5 and 6 is a contact type angle sensor.

[0064] In some embodiments, the angular displacement sensor shown in FIGS. 5 and 6 further includes a seal ring 500, and the seal ring 500 is attached to the rotor assembly 300. Optionally, a rotor cover 340 is attached to the rotor assembly housing chamber 110 so as to cover the rotor assembly housing chamber 110.

[0065] In all embodiments of the present invention, "big" and "small", "many" and "few", "up" and "down" are relative terms. For the expression of such relative terms, further explanation is omitted in the embodiments of the present invention.

[0066] Note that the phrases "in this embodiment", "in an embodiment of the present invention", or "as an alternative embodiment" described in the specification mean that specific features, structures, or characteristics related to the embodiment are included in at least one embodiment of the present invention. Therefore, the phrases "in this embodiment", "in an embodiment of the present invention", or "as an alternative embodiment" described in the specification do not necessarily refer to the same embodiment. Also, these specific features, structures, or characteristics can be combined in one or more embodiments in any suitable manner. It is obvious to those skilled in the art that all the embodiments described in the specification are alternative embodiments, and the operations and modules involved are not necessarily essential to the present invention.

[0067] In various embodiments of the present invention, the numbers of the above steps do not limit the execution order. Since the execution order of each step is determined by its function and internal logic, it should be understood that the numbers of the above steps do not limit the implementation steps of the embodiments of the present invention.

[0068] The above are only specific embodiments of the present invention, and the protection scope of the present invention is not limited thereto. Any changes or substitutions made by those skilled in the art within the technical scope disclosed by the present invention belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the scope of the claims.

Description of Reference Numerals

[0069] 100 Main body housing 110 Rotor assembly accommodation chamber 120 Upper housing 130 Lower housing 140 Metal terminal 150 First sealing component 160 Shield cover 200 Inductive circuit board 300 Rotor assembly 310 Rotor body 320 Magnet 330 Elastic component 340 Rotor cover 400 Metal Brush 500 Seal Ring

Claims

1. The rotor assembly includes a main body housing, an induction circuit board, and a rotor assembly. The main body housing is provided with a rotor assembly receiving chamber, and the induction circuit board is attached inside the main body housing, The rotor assembly includes a rotor body and a magnet, the rotor body is rotatably mounted in the rotor assembly receiving chamber, the magnet is disposed between the rotor body and the induction circuit board, and the magnet is fixedly mounted to one end of the rotor body. Angular displacement sensor characterized by:

2. The rotor assembly further includes an elastic part, one end of which is fixedly connected to the rotor assembly receiving chamber and the other end of which is fixedly connected to the rotor body.

2. The angular displacement sensor according to claim 1.

3. The elastic part is a spring member, the spring member being annularly attached to the outside of the rotor body, one end of the spring member being fixedly connected to the rotor assembly accommodating chamber and the other end being fixedly connected to the rotor body.

3. The angular displacement sensor according to claim 2.

4. 4. The angular displacement sensor according to claim 3, wherein the spring member is a torsion spring.

5. The main housing includes an upper housing and a lower housing, the upper housing is provided with the rotor assembly receiving chamber, the lower housing and the upper housing are assembled together, a metal terminal is provided on the lower housing, and the metal terminal is electrically connected to the induction circuit board.

2. The angular displacement sensor according to claim 1.

6. 6. The angular displacement sensor according to claim 5, wherein a shield cover is provided on the upper housing or the lower housing, the shield cover being made of metal to prevent interference from an external magnetic field.

7. The angular displacement sensor further includes a first sealing part, and the lower housing and the upper housing are sealed by the first sealing part.

6. The angular displacement sensor according to claim 5.

8. The rotor assembly further includes a rotor lid and a second sealing part, the rotor lid is attached to the rotor assembly accommodating chamber so as to cover the rotor assembly accommodating chamber, and the rotor lid is hermetically attached to the rotor assembly accommodating chamber via the second sealing part.

2. The angular displacement sensor according to claim 1.

9. The rotor assembly includes a main housing, an induction circuit board, metal brushes, and a rotor assembly. A rotor assembly accommodating chamber is provided in the main housing, and a metal terminal is provided in the main housing; the induction circuit board is mounted inside the body housing; The rotor assembly is rotatably installed in the rotor assembly receiving chamber of the main housing, the metal brushes are fixedly attached to the rotor assembly, and the metal brushes are electrically connected to the induction circuit board. Angular displacement sensor characterized by:

10. A measurement system comprising the angular displacement sensor according to any one of claims 1 to 9.

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