Built-in external high-precision, overtravel, and absolute position detection sensors

Abstract

This utility model discloses a built-in external high-precision, over-travel, and absolute position detection sensor, comprising: an outer tube and a telescopic plate, and a waveguide wire installed inside the outer tube. Electronic compartments are installed at both ends of the outer tube, and an arc-shaped mounting plate is installed at one end of the telescopic plate. A magnetic ring is installed on one outer wall of the arc-shaped mounting plate, and a guide wheel is installed at one end of the inner wall of the magnetic ring. Support components are installed at both ends of one outer wall of the outer tube, and the same guide plate is rotatably mounted on one end of each support component. This utility model's built-in external high-precision, over-travel, and absolute position detection sensor uses non-contact measurement, avoiding friction and wear, and extending its service life. It has good environmental adaptability and reliability, and can work stably and effectively. High-precision absolute position detection can be achieved by adjusting the structure to adapt to moving parts, providing great convenience for users and meeting the requirements for detection performance, lifespan, and stability.

Description

Technical Field

[0001] This utility model relates to the field of detection sensor technology, specifically to a built-in or external high-precision, over-travel, and absolute position detection sensor. Background Technology

[0002] In the field of displacement detection, existing products such as conductive rubber displacement sensors, magnetic grating displacement sensors, and resistive displacement sensors generally adopt contact measurement methods. These contact sensors are susceptible to friction and wear during use, resulting in a short lifespan and making it difficult to consistently meet the demands for high-precision and high-reliability displacement detection over long periods.

[0003] Meanwhile, in practical applications, the requirements for the environmental adaptability, operational stability, and detection effectiveness of sensors are gradually increasing. The shortcomings of traditional contact sensors in these aspects cause inconvenience to users, and there is an urgent need for a displacement detection solution that can avoid friction and wear problems and take into account both long life and good performance. Utility Model Content

[0004] The purpose of this invention is to provide a built-in or external high-precision, over-travel, and absolute position detection sensor to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a built-in external high-precision, overtravel, and absolute position detection sensor, comprising: an outer tube and a telescopic plate, and further comprising: a waveguide wire installed inside the outer tube. Electronic compartments are installed at both ends of the outer tube, and an arc-shaped mounting plate is installed at one end of the telescopic plate. A magnetic ring is installed on one outer wall of the arc-shaped mounting plate, and a guide wheel is installed at one end of the inner wall of the magnetic ring. Support components are installed at both ends of one outer wall of the outer tube, and the same guide plate is rotatably mounted at one end of the two support components. A guide groove is opened on one outer wall of the guide plate, and an ejection component is installed on one outer wall of the outer tube.

[0006] The telescopic plate includes a shell, a connecting plate slidably connected to the inner wall of the shell, and a limiting bolt screwed to the outer wall of the top of the shell.

[0007] The support assembly includes a guide rod, a lifting block sleeved on the outside of the guide rod, and a support rod rotatably mounted on one side of the outer wall of the lifting block.

[0008] One end of the support rod is rotatably connected to the outer wall of the guide plate.

[0009] The ejection assembly includes a fixed frame, a threaded rod rotatably mounted on one side of the outer wall of the fixed frame, a movable block screwed onto the threaded rod, and a push rod mounted on one side of the outer wall of the movable block.

[0010] One end of the top rod is fixedly connected to the outer wall of one side of the guide plate.

[0011] Compared with the prior art, the beneficial effects of this utility model are: This utility model features a built-in or external high-precision, extended-travel, absolute position detection sensor. Employing non-contact measurement, it avoids friction and wear, extending service life. It possesses excellent environmental adaptability and reliability, ensuring stable and effective operation. By adjusting the structure to accommodate moving parts, it achieves high-precision absolute position detection, greatly facilitating user operation and meeting requirements for detection performance, lifespan, and stability. Attached Figure Description

[0012] Figure 1 This is an external structural view of the present invention; Figure 2 This is a structural diagram of the magnetic ring of this utility model; Figure 3 This is a structural diagram of the telescopic plate component of this utility model; Figure 4 This is a structural diagram of the support component and the ejection component of this utility model.

[0013] In the diagram: 1. Outer tube; 2. Telescopic plate; 201. Shell; 202. Connecting plate; 203. Limiting bolt; 3. Waveguide wire; 4. Electronic compartment; 5. Arc-shaped mounting plate; 6. Magnetic ring; 7. Guide wheel; 8. Support assembly; 801. Guide rod; 802. Lifting block; 803. Support rod; 9. Guide plate; 10. Guide groove; 11. Ejection assembly; 1101. Fixing frame; 1102. Threaded rod; 1103. Moving block; 1104. Top rod. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] Please see Figure 1-4 The built-in external high-precision, overtravel, and absolute position detection sensor provided by this utility model includes: an outer tube 1 and a telescopic plate 2, and also includes: a waveguide wire 3 installed inside the outer tube 1. Electronic compartments 4 are installed at both ends of the outer tube 1, and an arc-shaped mounting plate 5 is installed at one end of the telescopic plate 2. A magnetic ring 6 is installed on one side of the outer wall of the arc-shaped mounting plate 5, and a guide wheel 7 is installed at one end of the inner wall of the magnetic ring 6. Support components 8 are installed at both ends of one side of the outer wall of the outer tube 1, and the same guide plate 9 is rotatably installed at one end of the two support components 8. A guide groove 10 is opened on one side of the outer wall of the guide plate 9, and an ejection component 11 is installed on one side of the outer wall of the outer tube 1.

[0016] It should be noted here that: Core component collaboration basis: the outer tube 1 serves as the basic installation carrier, the internal waveguide wire 3 is the core transmission component for displacement detection, and the electronic chambers 4 at both ends provide electronic signal support for detection; the telescopic plate 2 drives the magnetic ring 6 to move through the arc-shaped mounting plate 5, which is the key structure for realizing displacement following; the support component 8, the guide plate 9 and the ejection component 11 together constitute the guidance and stabilization system to ensure the accuracy of the detection process.

[0017] Guidance and stability mechanism When the ejector assembly 11 is in operation, it can drive the guide plate 9 to move, causing the guide wheel 7 on the inner wall of the magnetic ring 6 to embed into the guide groove 10 of the guide plate 9, providing a clear trajectory for the subsequent lifting and lowering movement of the magnetic ring 6, and avoiding deviation that affects the detection accuracy.

[0018] During the movement of the guide plate 9 and the magnetic ring 6, the support component 8 continuously supports the guide plate 9, maintains the stability of the guide plate 9, and ensures that the guiding function can be reliably performed.

[0019] Displacement detection core process Installation phase: The telescopic plate 2 is installed on the external moving part. When the moving part moves, it will drive the telescopic plate 2 to move synchronously, and then drive the magnetic ring 6 to move up and down along the outer tube 1 through the arc-shaped mounting plate 5.

[0020] Signal generation and interaction: Electronic components in the electronic chamber 4 generate current pulses, which form a magnetic field and propagate downwards along the waveguide wire 3; at the same time, the magnetic ring 6 itself also generates a magnetic field, and the two magnetic fields are superimposed to form a spiral magnetic field.

[0021] Pulse generation and detection: The helical magnetic field generates instantaneous torque, causing the waveguide wire 3 to twist and generate tension pulses. These tension pulses travel back along the waveguide wire 3 at a fixed speed, eventually forming induced current pulses (return pulses) at both ends of the coil.

[0022] Displacement calculation: By measuring the time difference between the current pulse (starting pulse) and the return pulse, and combining the fixed propagation speed of the tension pulse on the waveguide wire 3, the measured displacement can be accurately calculated, thus realizing absolute position detection.

[0023] In a preferred embodiment, the telescopic plate 2 includes a housing 201, a connecting plate 202 slidably connected to the inner wall of the housing 201, and a limiting bolt 203 screwed to the top outer wall of the housing 201.

[0024] It should be noted that: the housing 201 provides a basic installation space for the telescopic plate 2, and the connecting plate 202 can slide along the inner wall of the housing 201 to adjust the overall length of the telescopic plate 2; when the length of the telescopic plate 2 is adjusted to meet the installation requirements of the external moving parts, the limiting bolt 203 on the top of the housing 201 is tightened. The limiting bolt 203 compresses and fixes the connecting plate 202, restricting the sliding of the connecting plate 201, thereby fixing the telescopic plate 2 at the required length, ensuring that it can be stably connected to the moving parts, and thus reliably driving the magnetic ring 6 to move with the moving parts, providing a stable motion transmission basis for subsequent displacement detection.

[0025] In a preferred embodiment, the support assembly 8 includes a guide rod 801, a lifting block 802 sleeved on the outside of the guide rod 801, and a support rod 803 rotatably mounted on one side of the outer wall of the lifting block 802.

[0026] It should be noted that: the guide rod 801 provides a vertical mounting and movement reference for the support assembly 8, and the lifting block 802 can slide up and down along the axis of the guide rod 801; one end of the support rod 803 is rotatably connected to the lifting block 802, and the other end is rotatably connected to the guide plate 9. When the guide plate 9 changes angle or position under the action of the ejector assembly 11, it will push the lifting block 802 to slide along the guide rod 801 through the support rod 803. During this process, the guide rod 801 restricts the movement direction of the lifting block 802, while the support rod 803 transmits the force on the guide plate 9 to the lifting block 802 and the guide rod 801, forming a support for the guide plate 9, preventing the guide plate 9 from shifting or shaking due to force, and ensuring the stable realization of the guiding function.

[0027] In a preferred embodiment, one end of the support rod 803 is rotatably connected to the outer wall of the guide plate 9.

[0028] It should be noted that since one end of the support rod 803 is rotatably connected to the outer wall of the guide plate 9, when the guide plate 9 moves or rotates under the action of the ejector assembly 11, the support rod 803 can rotate flexibly around the connection point with the guide plate 9, while simultaneously driving the lifting block 802 to slide along the guide rod 801. This rotatable connection eliminates the rigid constraint between the support rod 803 and the guide plate 9, making the movement of the guide plate 9 smoother and avoiding jamming or damage to the guide plate 9 due to limitations in the connection method. At the same time, it ensures that the support rod 803 can always provide effective support for the guide plate 9, maintaining the stability of the guide plate 9 during movement and laying the foundation for the precise guidance of the magnetic ring 6.

[0029] In a preferred embodiment, the ejection assembly 11 includes a fixed frame 1101, a threaded rod 1102 rotatably mounted on one side of the outer wall of the fixed frame 1101, a movable block 1103 screwed onto the threaded rod 1102, and a push rod 1104 mounted on one side of the outer wall of the movable block 1103.

[0030] It should be noted that when the guide plate 9 needs to be moved, the drive threaded rod 1102 rotates around its own axis. Since the moving block 1103 is screwed to the threaded rod 1102 and is restricted by the structure of the fixed frame 1101, it cannot rotate synchronously with the threaded rod 1102. The rotational motion of the threaded rod 1102 will be converted into the linear motion of the moving block 1103 along the axis of the threaded rod 1102. When the moving block 1103 moves, it will drive the top rod 1104 to move synchronously. Then, the top rod 1104 will push the guide plate 9 to achieve position adjustment, providing power for the guide wheel 7 of the magnetic ring 6 to be embedded in the guide groove 10, ensuring the normal construction of the guide system.

[0031] In a preferred embodiment, one end of the top rod 1104 is fixedly connected to the outer wall of one side of the guide plate 9.

[0032] It should be noted that one end of the push rod 1104 is fixedly connected to the outer wall of one side of the guide plate 9, so that the push rod 1104 and the guide plate 9 form an integral structure. When the moving block 1103 in the ejector assembly 11 drives the push rod 1104 to move linearly, the push rod 1104 can directly and stably transmit the driving force of the moving block 1103 to the guide plate 9.

[0033] Working principle: I. Core Component Functions and Collaboration Basics Basic carrier and signal transmission components Outer tube 1: Serves as the mounting base for the overall structure. It contains waveguide wire 3, provides an external track for the movement of magnetic ring 6, and supports the installation of components such as electronic compartment 4 and support assembly 8.

[0034] Waveguide wire 3: The core conductive medium for displacement detection, used to transmit the magnetic field generated by the current pulse, as well as the tension pulse generated by the subsequent magnetic field superposition. It is the key carrier for realizing signal transmission and displacement calculation.

[0035] Electronic compartment 4: Contains built-in electronic components responsible for generating initial current pulses and receiving induced current pulses (return pulses) transmitted back by waveguide wire 3, providing hardware support for signal generation and processing for displacement detection.

[0036] Displacement following and guidance stabilization system Telescopic plate 2: Composed of housing 201, connecting plate 202 and limiting bolt 203, it is installed on the external moving part. The overall length can be adjusted by sliding the connecting plate 201 along the housing 201 to adapt to the installation requirements of different moving parts. Tightening the limiting bolt 203 can fix the length. When the moving part moves, it will drive the telescopic plate 2 to move synchronously, which in turn drives the magnetic ring 6 to move along the outer tube 1 through the arc-shaped mounting plate 5, realizing the displacement following of the "moving part - sensor".

[0037] Magnetic ring 6 and guide wheel 7: The magnetic ring 6 is connected to the telescopic plate 2 through the arc-shaped mounting plate 5 and can move up and down along the outer tube 1. It can generate a magnetic field on its own. The guide wheel 7 is installed on the inner wall of the magnetic ring 6 and is used to embed into the guide groove 10 of the guide plate 9 to limit the movement trajectory of the magnetic ring 6 and avoid deviation that affects the detection accuracy.

[0038] Guide plate 9 and support assembly 8: Guide plate 9 provides a motion track for guide wheel 7 through guide groove 10; support assembly 8 consists of guide rod 801, lifting block 802 and support rod 803. The two ends of support rod 803 are rotatably connected to lifting block 802 and guide plate 9 respectively, and lifting block 802 can slide along guide rod 801. When guide plate 9 moves, support rod 803 drives lifting block 802 to adjust its position along guide rod 801, which provides support and stability for guide plate 9, ensuring that guide groove 10 always maintains a stable trajectory.

[0039] Ejection assembly 11: It consists of a fixed frame 1101, a threaded rod 1102, a movable block 1103 and a push rod 1104. The fixed frame 1101 is fixed on the outer tube 1. When the threaded rod 1102 rotates, it drives the movable block 1103 to move linearly along the rod body. Then, the push rod 1104 (fixedly connected to the guide plate 9) pushes the guide plate 9 to adjust its position, so that the guide wheel 7 of the magnetic ring 6 is accurately embedded in the guide groove 10, thus completing the construction of the guide system.

[0040] II. Complete Testing Workflow Preliminary preparations: Wayfinding system setup During installation, first connect the telescopic plate 2 to the external moving part, adjust the length of the connecting plate 202 extending out of the housing 201 according to the size of the moving part, and tighten the limiting bolt 203 to fix it; then put the magnetic ring 6 on the outside of the outer tube 1, and drive the threaded rod 1102 of the push-out component 11 to make the moving block 1103 drive the push rod 1104 to push the guide plate 9 to move until the guide wheel 7 on the inner wall of the magnetic ring 6 extends into the guide groove 10 of the guide plate 9. At the same time, the support rod 803 of the support component 8 adjusts its angle with the movement of the guide plate 9, and the lifting block 802 slides along the guide rod 801 to form a stable support for the guide plate 9, ensuring that the magnetic ring 6 can only rise and fall along the trajectory of the guide groove 10.

[0041] Displacement following: Synchronous movement of magnetic ring When the external moving part is displaced, it will drive the telescopic plate 2 to move synchronously. The telescopic plate 2 drives the magnetic ring 6 to move up and down along the outer tube 1 through the arc-shaped mounting plate 5. The movement trajectory of the magnetic ring 6 is limited by the guide wheel 7 and the guide groove 10 to ensure that the magnetic ring 6 is always consistent with the displacement state of the moving part.

[0042] Magnetic field interaction and pulse generation The electronic components inside the electronic compartment 4 generate a current pulse, which generates a magnetic field around the waveguide wire 3 and the magnetic field propagates downward along the waveguide wire 3. At the same time, the magnetic ring 6, which is in motion, also generates a magnetic field. When the current magnetic field on the waveguide wire 3 meets the magnetic field of the magnetic ring 6, the two superimpose to form a spiral magnetic field.

[0043] The helical magnetic field will generate instantaneous torque on the waveguide wire 3, causing the waveguide wire 3 to twist and generate tension pulses. These tension pulses are transmitted back along the waveguide wire 3 towards the electronic chamber 4 at a fixed speed, determined by the material properties of the waveguide wire.

[0044] Pulse detection and displacement calculation When the tension pulse returns to the vicinity of the electronic chamber 4, it will induce a current pulse (i.e., a return pulse) at both ends of the coil. The detection module inside the electronic chamber 4 records the time difference between the initial current pulse (starting pulse) and the return pulse. Combined with the fixed propagation speed of the tension pulse on the waveguide wire 3, the displacement of the magnetic ring 6 is accurately calculated using the formula "displacement = velocity × time difference". The displacement of the magnetic ring 6 is consistent with the displacement of the external moving part, thus achieving high-precision detection of the absolute position of the moving part.

[0045] III. Core Advantages and Supporting Principles This sensor employs a non-contact measurement method. Compared to traditional contact sensors (such as conductive rubber displacement sensors and resistive displacement sensors), its core advantage stems from the detection logic of "magnetic field interaction rather than physical friction": the magnetic ring 6 and the waveguide wire 3 have no direct contact, and signal interaction is achieved only through the magnetic field, avoiding the problem of reduced lifespan caused by friction and wear; at the same time, the guiding system (guide wheel, guide groove, support component) ensures the stability of the magnetic ring 6's movement trajectory, and the pulse detection and calculation logic of the electronic compartment 4 ensures the high accuracy of displacement data, ultimately achieving the absolute position detection function of "long lifespan, high reliability, and high accuracy".

[0046] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. Built-in and external high-precision, overtravel, and absolute position detection sensors, including: Outer tube (1) and telescopic plate (2); The invention is characterized by further comprising: a waveguide wire (3) installed inside the outer tube (1), an electronic compartment (4) installed at both ends of the outer tube (1), and an arc-shaped mounting plate (5) installed at one end of the telescopic plate (2), a magnetic ring (6) installed on one side of the outer wall of the arc-shaped mounting plate (5), and a guide wheel (7) installed at one end of the inner wall of the magnetic ring (6), a support assembly (8) installed at both ends of one side of the outer wall of the outer tube (1), and the same guide plate (9) rotatably installed at one end of the two support assemblies (8), a guide groove (10) opened on one side of the outer wall of the guide plate (9), and an ejection assembly (11) installed on one side of the outer wall of the outer tube (1).

2. The built-in plug-in high-precision, super-stroke, absolute position detection sensor according to claim 1, characterized in that: The telescopic plate (2) includes a housing (201), a connecting plate (202) slidably connected to the inner wall of the housing (201), and a limiting bolt (203) screwed to the outer wall of the top of the housing (201).

3. The built-in plug-in high-precision, super-stroke, absolute position detection sensor according to claim 1, characterized in that: The support assembly (8) includes a guide rod (801), a lifting block (802) sleeved on the outside of the guide rod (801), and a support rod (803) rotatably mounted on one side of the outer wall of the lifting block (802).

4. The built-in plug-in high-precision, super-stroke, absolute position detection sensor according to claim 3, characterized in that: One end of the support rod (803) is rotatably connected to the outer wall of the guide plate (9).

5. The built-in plug-in high-precision, super-stroke, absolute position detection sensor according to claim 1, characterized in that: The ejection assembly (11) includes a fixed frame (1101), a threaded rod (1102) rotatably mounted on one side of the outer wall of the fixed frame (1101), a movable block (1103) screwed onto the threaded rod (1102), and a push rod (1104) mounted on one side of the outer wall of the movable block (1103).

6. The built-in plug-in high-precision, super-stroke, absolute position detection sensor according to claim 5, characterized in that: One end of the top rod (1104) is fixedly connected to the outer wall of one side of the guide plate (9).

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