A ring-shaped sensor

Abstract

The present invention discloses an annular sensor, which relates to the technical field of sensor equipment, and aims to solve the problem of inaccurate measurement due to the existence of coupling force in existing sensors. It includes a sensor element, a positioning and mounting mechanism integrating a bearing plate, an electrical port, a mounting sleeve and a positioning component. The mounting sleeve constructs a sensor mounting frame, and the electrical port transmits electrical signals. The expansion mechanism is composed of a top plate, a telescopic part, a bottom plate and an expansion component. While enclosing the installation space, the expansion component cooperates with the telescopic part to reduce the coupling force when the sensor is under pressure. When subjected to external pressure, the sensor element can be expanded evenly and stably, effectively eliminating the shaking and coupling force in the mounting sleeve, thereby greatly improving the accuracy and stability of the measurement.

Description

Technical Field

[0001] The present invention relates to the technical field of sensor equipment, in particular to a ring sensor. Background Art

[0002] In the fields of modern industrial production, automatic control and precision measurement, the ring sensor plays a vital role with its unique structural advantages and wide applicability. It can accurately measure various physical quantities such as force, pressure, displacement, etc., and is widely used in many industries such as machinery manufacturing, aerospace, and automobile industry.

[0003] However, the existing annular sensors still have many problems in practical applications. On the one hand, during the installation process, the traditional annular sensors are not accurately positioned, which can easily cause the sensor elements to shake during use, which not only affects the measurement accuracy, but also may shorten the service life of the sensor. On the other hand, when the sensor element is subjected to external pressure, a large coupling force will be generated between the internal components, making the sensor response less sensitive and difficult to accurately reflect the actual changes in the measured physical quantity. In addition, the existing annular sensors lack an effective adaptive adjustment mechanism and cannot reasonably fix and protect the sensor elements according to the actual pressure. When the pressure is too high, the sensor elements are easily damaged, causing equipment failure and economic losses.

[0004] Therefore, in order to overcome the above-mentioned defects of the existing annular sensors and improve their measurement accuracy, stability and reliability, it is of great practical significance and broad market prospects to develop a new type of annular sensor with a precise positioning and installation mechanism, a spreading mechanism that effectively reduces the coupling force, and an intelligent control system. Summary of the invention

[0005] The object of the present invention is to provide a ring sensor to solve the problems mentioned in the above background technology and the problems mentioned in the prior art.

[0006] To achieve the above object, the present invention provides the following technical solution: an annular sensor, comprising:

[0007] The sensor element further comprises:

[0008] A positioning and mounting mechanism, comprising a bearing plate, an electrical connection port, a mounting sleeve and a positioning assembly;

[0009] The mounting sleeve is mounted on the carrier plate and used to form a mounting frame for supporting the sensor element, and the electrical connection port is mounted on the side wall of the carrier plate and used to transmit the electrical signal in the device through the connection wire;

[0010] The spreading mechanism comprises a top plate, a telescopic member, a bottom plate and a spreading assembly;

[0011] The top plate and the bottom plate are respectively mounted on the mounting sleeve and the supporting plate and are used to form a closed space for the positioning and mounting mechanism. The expansion assembly is mounted on the bottom plate and is used to assist the sensor element in reducing the coupling force when it is squeezed. The telescopic member is mounted on the top plate and is used to cooperate with the expansion assembly for expansion.

[0012] Furthermore, the sensor element comprises a strain beam, the upper end surface array of the strain beam is provided with an upper bearing column for applying pressure to the strain beam, and the lower end surface array of the strain beam is provided with a lower bearing column for cooperating with the upper bearing column to apply pressure to the strain beam.

[0013] Further, the positioning assembly includes an array of U-shaped grooves and base grooves arranged on the carrier plate for fixing the carrier plate;

[0014] It also includes a strain gauge mounting block, a mounting groove is opened on the inner wall of the mounting sleeve, the strain gauge mounting block is located in the mounting groove and is fixed on the mounting sleeve by bolts, and a positioning hole for installing the strain gauge is opened on one side of the strain gauge mounting block.

[0015] Further, the expansion assembly comprises a mounting tube mounted on the bottom plate, the mounting tube is provided with mounting plates in array, the mounting plates are hinged to the mounting tube, one end of the mounting plate is hinged with a connecting rod, the other end of the connecting rod is hinged with an abutment block, and the mounting tube is also provided with a spring for resetting the mounting tube;

[0016] The telescopic member and the mounting plate correspond to each other one by one and are located on the same vertical axis.

[0017] Furthermore, it also includes a strain gauge, which is installed on the strain gauge mounting block through the cooperation of the positioning hole and the positioning pin, and the strain gauge is provided with a welding pad, and the lead wire of the strain gauge is welded on the welding pad on the strain gauge.

[0018] Furthermore, under normal conditions, a gap is left between the sensor element and the strain gauge, wherein the strain gauge mounting blocks in the positioning and mounting mechanism and the abutment blocks in the expansion mechanism are provided in plurality and are distributed in a cross-symmetrical manner. Under pressure, the sensor element is expanded inside the expansion mechanism to prevent shaking, and the strain beam is deformed under the extrusion of the upper and lower load-bearing columns and squeezes the strain gauge to change the resistance signal.

[0019] Furthermore, the end faces of the abutment blocks and the inner ring of the strain beam that fit together are arc-shaped faces, and a triangular stable structure is formed between two adjacent abutment blocks and the strain beam.

[0020] Furthermore, it also includes a processor, which is equipped with a central control system for controlling the expansion mechanism to expand the sensor element according to the pressure on the sensor element, and the central control system is equipped with a sensor module, a data processing module, an alarm module and a control module;

[0021] The sensor module includes a pressure unit, which is used to obtain the pressure on the sensor element and generate pressure information;

[0022] The data processing module includes a pressing unit, which is equipped with a comparison strategy and a stretching strategy. The comparison strategy is used to obtain pressure information, compare it with a pressure threshold and generate control information, and transmit the control information to the control module to control the telescopic part.

[0023] Furthermore, the specific steps of controlling the telescopic component based on the comparison strategy include:

[0024] If the comparison strategy detects that the pressure on the sensor element is less than or equal to the pressure threshold, a power-on command is generated to control the telescopic part to descend. When the telescopic part descends, it applies pressure to the mounting plate and rotates the mounting plate, thereby driving multiple abutment blocks to stretch the sensor element outward to fix the position of the sensor element and eliminate the coupling force of the sensor element in the mounting sleeve.

[0025] Furthermore, the specific steps of controlling the alarm module based on the comparison strategy include:

[0026] If the comparison strategy detects that the pressure on the sensor element is greater than the pressure threshold, an alarm instruction is generated, and the alarm module is controlled to alarm based on the alarm instruction to remind the staff to perform maintenance.

[0027] Compared with the prior art, the present invention has the following significant effects:

[0028] 1. This device significantly enhances the stability of the sensor element through the innovative design of the expansion mechanism. When subjected to external pressure, the sensor element can be expanded evenly and stably, effectively eliminating the shaking and coupling force in the installation sleeve, thereby greatly improving the accuracy and stability of the measurement. In addition, the triangular stable structure formed by the arc-shaped abutment block and the inner circle of the strain beam not only optimizes the pressure distribution, but also protects the sensor element from local damage, further extending the service life and ensuring high-precision long-term measurement.

[0029] Second, the central control system with integrated processor is another highlight of the device. The system can intelligently control the action of the expansion mechanism in real time according to the pressure on the sensor element, realizing automatic management. When the pressure is within the preset range, the system automatically expands the sensor element to fix its position; when the pressure is abnormal, the alarm mechanism is immediately triggered to remind the staff to repair it in time. This intelligent early warning and management mode not only improves work efficiency, but also significantly enhances the safety and reliability of the system.

[0030] 3. The design of this device fully considers the convenience of installation and maintainability. The fixing process of the load-bearing plate is simplified through positioning components such as U-shaped grooves and base grooves, while the positioning holes and positioning pins on the strain gauge mounting block greatly facilitate the installation and replacement of the strain gauge. In addition, the compact structural design enables the device to achieve efficient use of space while maintaining strong functionality, making it very suitable for installation and use in limited spaces. This optimized design not only reduces costs, but also improves the overall aesthetics and practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is an axonometric view of the annular sensor of the present invention;

[0032] Figure 2 For the present invention Figure 1 Schematic diagram of local explosion structure;

[0033] Figure 3 for Figure 1 A schematic diagram of the front view structure of

[0034] Figure 4 for Figure 1 Schematic diagram of the explosion structure;

[0035] Figure 5 This is an axial schematic diagram of the sensor element in the present invention;

[0036] Figure 6 This is a schematic diagram of the axial structure of the support assembly in the present invention;

[0037] Figure 7 for Figure 6 Schematic diagram of the structure of the middle part;

[0038] Figure 8 This is a flow chart of the central control system of the present invention;

[0039] In the figure: 100, positioning and mounting mechanism; 101, bearing plate; 102, power connection port; 103, mounting sleeve; 104, bolt; 105, strain gauge mounting block; 106, base groove; 107, U-shaped groove; 200, expanding mechanism; 201, top plate; 202, telescopic member; 203, bottom plate; 204, mounting cylinder; 2041, mounting plate; 2042, connecting rod; 2043, abutting block; 2044, spring; 300, sensor element; 301, strain beam; 302, upper bearing column; 303, lower bearing column. Detailed implementation mode

[0040] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0041] Embodiment 1:

[0042] Please refer to Figures 1-8 , this embodiment provides an annular sensor, including: sensor element 300, and further including:

[0043] Positioning and mounting mechanism 100, which includes a bearing plate 101, a power connection port 102, a mounting sleeve 103 and a positioning component;

[0044] The mounting sleeve 103 is installed on the bearing plate 101 and is used to form a mounting frame for supporting the sensor element 300. The power connection port 102 is installed on the side wall of the bearing plate 101 and is used to transmit the electrical signal in the device through a connection wire; by providing the mounting frame and the electrical connection interface. The bearing plate 101 serves as a base, the mounting sleeve 103 forms a frame for supporting the sensor element 300, and the power connection port 102 is used for signal output

[0045] Expanding mechanism 200, which includes a top plate 201, a telescopic member 202, a bottom plate 203 and an expanding component;

[0046] The top plate 201 and the bottom plate 203 are respectively installed on the mounting sleeve 103 and the bearing plate 101 and are used to form a closed space for the positioning and mounting mechanism 100. The expanding component is installed on the bottom plate 203 and is used to assist in reducing the coupling force when the sensor element 300 is squeezed. The telescopic member 202 is installed on the top plate 201 and is used to cooperate with the expanding component for expansion. The top plate 201 and the bottom plate 203 enclose the positioning and mounting mechanism 100 to form a protection space. The expanding component is composed of a mounting plate 2041, a connecting rod 2042 and an abutting block 2043 on the mounting cylinder 204. It can support and limit the strain beam 301 through the action of the spring 2044 and the telescopic member 202 when the sensor is pressed, preventing it from shaking.

[0047] The sensor element 300 includes a strain beam 301. On the upper end face of the strain beam 301, upper bearing columns 302 for pressing on the strain beam 301 are arranged in an array. On the lower end face of the strain beam 301, lower bearing columns 303 for cooperating with the upper bearing columns 302 to press on the strain beam 301 are arranged in an array. The strain beam 301 is the core component, and the upper bearing column 302 and the lower bearing column 303 are respectively arranged at the upper end and the lower end thereof, for converting external pressure into the deformation of the strain beam 301.

[0048] The positioning assembly includes U-shaped grooves 107 and base grooves 106 which are arranged in an array on the bearing plate 101 for fixing the bearing plate 101.

[0049] It further includes a strain gauge mounting block 105. An installation groove is formed on the inner wall of the installation sleeve 103. The strain gauge mounting block 105 is located in the installation groove and is fixedly installed on the installation sleeve 103 through a bolt 104. A positioning hole for installing a strain gauge is formed on one side of the strain gauge mounting block 105. The strain gauge is installed on the strain gauge mounting block 105 and is connected to a lead through a pad. When the strain beam 301 deforms and contacts the strain gauge, the resistance value of the strain gauge is changed, and this change is transmitted through the power connection port 102.

[0050] The spreading assembly includes an installation cylinder 204 installed on the bottom plate 203. Installation plates 2041 are arranged in an array on the installation cylinder 204. The installation plates 2041 are hinged to the installation cylinder 204. One end of the installation plate 2041 is hinged with a connecting rod 2042. The other end of the connecting rod 2042 is hinged with an abutting block 2043. A spring 2044 for resetting the installation cylinder 204 is further arranged on the installation cylinder 204.

[0051] The telescopic member 202 and the installation plate 2041 correspond one by one and are located on the same vertical axis.

[0052] It further includes a strain gauge. The strain gauge is installed on the strain gauge mounting block 105 through the cooperation of a positioning hole and a positioning pin. A pad is arranged on the strain gauge, and the lead of the strain gauge is welded to the pad located on the strain gauge.

[0053] Normally, a gap is left between the sensor element 300 and the strain gauge. Among them, a plurality of strain gauge mounting blocks 105 in the positioning and mounting mechanism 100 and abutting blocks 2043 in the spreading mechanism 200 are both arranged in a cross-symmetric distribution. In a compressed state, the sensor element 300 is spread open inside the spreading mechanism 200 to prevent shaking. The strain beam 301 deforms under the extrusion of the upper bearing column 302 and the lower bearing column 303 and squeezes the strain gauge to change the resistance signal.

[0054] The end surfaces of the abutment blocks 2043 and the inner circle of the strain beam 301 are arc-shaped surfaces, and a triangular stable structure is formed between two adjacent abutment blocks 2043 and the strain beam 301 .

[0055] As can be seen from the above, the device is a pressure sensor, and its core working principle is based on the deformation of the strain beam 301 when it is subjected to pressure, thereby changing the resistance value of the strain gauge in contact with it, and indirectly measuring the applied pressure by measuring this resistance change. Under normal conditions, there is a gap between the sensor element 300 and the strain gauge, and no signal output is generated. When external pressure acts on the sensor, the upper bearing column 302 and the lower bearing column 303 apply pressure to the strain beam 301, causing it to deform. At the same time, the abutment block 2043 of the support mechanism 200 supports and limits the strain beam 301 under the action of the internal spring 2044 and the telescopic member 202, preventing it from shaking when under pressure, thereby ensuring the accuracy of the measurement. The deformation of the strain beam 301 causes it to contact the strain gauge and exert pressure, thereby changing the resistance value of the strain gauge. This resistance change is transmitted through the electrical port 102 and is further processed and measured as an electrical signal. In summary, the device achieves accurate measurement of external pressure through the design of the mechanical structure, and outputs it in the form of an electrical signal. Through a simple structure, the coupling force between the sensor element 300 in the sensor and the sensor mounting structure is effectively eliminated, thereby enhancing the accuracy of the measurement.

[0056] Embodiment 2:

[0057] Based on Example 1, please refer to Figures 1-8 ,

[0058] Replacement of telescopic member 202:

[0059] Original component: telescopic part 202 (such as electric push rod or cylinder)

[0060] Replacement components: Linear actuators (such as linear motors or screw drives)

[0061] Reasons to replace: Linear actuators can provide smoother, more precise motion control and in some cases may be more compact than traditional pneumatic cylinders or electric actuators.

[0062] The integrally cast frame replaces the mounting cylinder 204 (made of aluminum alloy or steel).

[0063] Reason for replacement: The one-piece cast frame has higher structural strength and rigidity, can reduce assembly errors between components, and improve overall stability and durability.

[0064] Replacement component: A contact pad made of a polymer elastic material replaces the abutment block 2043 (such as silicone or polyurethane).

[0065] Replacement reason: The polymer elastic material can provide better buffering and shock absorption effects, reduce mechanical stress that may be caused by rigid contact, and at the same time protect the sensor element 300 from damage.

[0066] When the system is running, the linear brake (the replaced telescopic member 202) performs telescopic motion according to the instructions of the central control system. When the pressure on the sensor element 300 is less than or equal to the preset pressure threshold, the linear brake descends, pushing the mounting plate 2041 to rotate around the hinge point, and then driving the abutting block 2043 (now the polymer elastic material contact pad) to expand outward through the connecting rod 2042 to support the sensor element 300. This action not only fixes the position of the sensor element 300 but also eliminates the coupling force within the mounting sleeve 103.

[0067] When the sensor element 300 is subjected to external pressure, the strain beam 301 deforms due to the extrusion of the upper load-bearing column 302 and the lower load-bearing column 303. This deformation is then transmitted to the strain gauge mounted on the strain gauge mounting block 105, changing its resistance value, thereby generating a measurable electrical signal.

[0068] If the pressure on the sensor element 300 exceeds the preset pressure threshold, the central control system will activate the alarm module to remind the staff to perform maintenance.

[0069] The replaced device adopts the following mechanical principles:

[0070] Lever principle: The mounting plate 2041, as part of the lever, rotates around the hinge point under the push of the linear brake, thus realizing the expansion action.

[0071] Elastic deformation: The contact pad made of polymer elastic material undergoes elastic deformation when subjected to pressure, providing necessary support and buffering for the sensor element 300.

[0072] Strain-resistance effect: The strain gauge changes its resistance value according to the deformation of the strain beam 301, which is the basic principle of the sensor's operation.

[0073] Embodiment III:

[0074] Based on Embodiment I and Embodiment II, please refer to Figure 8 ,

[0075] It further includes a processor, and the processor is equipped with a central control system that controls the expansion mechanism 200 to expand the sensor element 300 according to the pressure magnitude on the sensor element 300. The central control system is equipped with a sensor module, a data processing module, an alarm module, and a control module;

[0076] The sensor module includes a pressure unit, which is used to obtain the pressure on the sensor element 300 and generate pressure information;

[0077] The data processing module includes a pressing unit, which is equipped with a comparison strategy and a stretching strategy. The comparison strategy is used to obtain pressure information, compare it with a pressure threshold and generate control information, which is then transmitted to the control module to control the telescopic member 202 based on the control information.

[0078] The specific steps of controlling the telescopic component 202 based on the comparison strategy include:

[0079] If the comparison strategy detects that the pressure applied to the sensor element 300 is less than or equal to the pressure threshold, a power-on command is generated to control the telescopic member 202 to descend. When the telescopic member 202 descends, it applies pressure to the mounting plate 2041 and causes the mounting plate 2041 to rotate, thereby driving the multiple abutment blocks 2043 to expand the sensor element 300 outward, so as to fix the position of the sensor element 300 and eliminate the coupling force of the sensor element 300 in the mounting sleeve 103.

[0080] The specific steps of controlling the alarm module based on the comparison strategy include:

[0081] If the comparison strategy detects that the pressure on the sensor element 300 is greater than the pressure threshold, an alarm instruction is generated, and the alarm module is controlled to alarm based on the alarm instruction to remind the staff to perform maintenance. The processor is equipped with a central control system for controlling the expansion mechanism 200 according to the pressure on the sensor element 300. The central control system includes four main modules: a sensor module, a data processing module, an alarm module and a control module. The sensor module is used to monitor the pressure on the sensor element 300 and generate pressure information. The data processing module receives this information and compares it with the preset pressure threshold, and generates corresponding control information based on the comparison result. These control information are then transmitted to the control module to control the action of the telescopic member 202. The alarm module sounds an alarm when abnormal pressure is detected to remind the staff to perform maintenance.

[0082] As can be seen from the above, the propping mechanism 200 includes components such as a telescopic member 202 and a mounting plate 2041. When the comparison strategy of the data processing module detects that the pressure on the sensor element 300 is less than or equal to the pressure threshold, a power-on instruction will be generated to control the telescopic member 202 to descend. When the telescopic member 202 descends, pressure will be applied to the mounting plate 2041 to rotate it. The rotation of the mounting plate 2041 will drive the multiple abutment blocks 2043 to move outward, thereby propping up the sensor element 300. In this way, the position of the sensor element 300 can be fixed and its coupling force in the mounting sleeve 103 can be eliminated. If the comparison strategy detects that the pressure on the sensor element 300 is greater than the pressure threshold, an alarm instruction will be generated to control the alarm module to sound an alarm and remind the staff to perform maintenance.

[0083] In the embodiments provided in this application, it should be understood that the disclosed devices and methods can be implemented in other ways. The device embodiments described above are only illustrative. For example, the division of the system is only a logical function division. There may be other division methods in actual implementation. For example, multiple systems or components can be combined or integrated into another system, or some features can be ignored or not executed.

[0084] Finally, it should be noted that the above-described embodiments are only specific implementations of the present invention, which are used to illustrate the technical solutions of the present invention, rather than to limit them. The protection scope of the present invention is not limited thereto. Although the present invention is described in detail with reference to the above-described embodiments, ordinary technicians in the field should understand that any technician familiar with the technical field can still modify the technical solutions recorded in the above-described embodiments within the technical scope disclosed by the present invention, or can easily think of changes, or make equivalent replacements for some of the technical features therein; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A ring-shaped sensor, characterized in that, include: The sensor element (300) further comprises: A positioning and mounting mechanism (100) comprising a bearing plate (101), an electrical connection port (102), a mounting sleeve (103) and a positioning assembly; The mounting sleeve (103) is mounted on the carrier plate (101) and is used to form a mounting frame for supporting the sensor element (300); the electrical connection port (102) is mounted on a side wall of the carrier plate (101) and is used to transmit electrical signals in the device through electrical connection wires; The spreading mechanism (200) comprises a top plate (201), a telescopic member (202), a bottom plate (203) and a spreading assembly; The top plate (201) and the bottom plate (203) are respectively mounted on the mounting sleeve (103) and the bearing plate (101) and are used to form a closed space for the positioning mounting mechanism (100); the expansion assembly is mounted on the bottom plate (203) and is used to assist the sensor element (300) in reducing the coupling force when it is squeezed; and the telescopic member (202) is mounted on the top plate (201) and is used to cooperate with the expansion assembly to expand; The expansion assembly comprises a mounting cylinder (204) mounted on a bottom plate (203); a mounting plate (2041) is arranged in an array on the mounting cylinder (204); the mounting plate (2041) is hingedly connected to the mounting cylinder (204); a connecting rod (2042) is hingedly provided at one end of the mounting plate (2041); an abutment block (2043) is hingedly provided at the other end of the connecting rod (2042); and a spring (2044) for resetting the mounting cylinder (204) is also provided on the mounting cylinder (204); The telescopic member (202) and the mounting plate (2041) correspond one to one and are located on the same vertical axis; It also includes a strain gauge, the strain gauge is mounted on the strain gauge mounting block (105) through the cooperation of the positioning hole and the positioning pin, the strain gauge is provided with a welding pad, and the lead wire of the strain gauge is welded on the welding pad on the strain gauge; Under normal conditions, a gap is left between the sensor element (300) and the strain gauge, wherein the strain gauge mounting blocks (105) in the positioning and mounting mechanism (100) and the abutment blocks (2043) in the expansion mechanism (200) are both provided with a plurality of blocks and are distributed in a cross-symmetrical manner. Under pressure, the sensor element (300) is expanded inside the expansion mechanism (200) to prevent shaking, and the strain beam (301) is deformed under the compression of the upper bearing column (302) and the lower bearing column (303), and compresses the strain gauge to change the resistance signal.

2. The annular sensor according to claim 1, wherein The sensor element (300) comprises a strain beam (301), an upper end surface array of the strain beam (301) being provided with an upper load-bearing column (302) for applying pressure to the strain beam (301), and a lower end surface array of the strain beam (301) being provided with a lower load-bearing column (303) for cooperating with the upper load-bearing column (302) to apply pressure to the strain beam (301).

3. The annular sensor according to claim 2, characterized in that, The positioning assembly comprises a U-shaped groove (107) and a base groove (106) arranged in an array on the carrier plate (101) and used for fixing the carrier plate (101); It further includes a strain gauge mounting block (105). An installation groove is provided on the inner wall of the installation sleeve (103). The strain gauge mounting block (105) is located in the installation groove and is fixedly installed on the installation sleeve (103) through a bolt (104). A positioning hole for installing a strain gauge is provided on one side of the strain gauge mounting block (105).

4. A circular sensor according to claim 1, characterized in that, The end face of the abutting block (2043) that fits with the inner ring of the strain beam (301) is an arc surface. A triangular stable structure is formed between two adjacent abutting blocks (2043) and the strain beam (301).

5. A ring-shaped sensor according to claim 1, characterized in that, It further includes a processor. The processor is equipped with a central control system that controls the expansion mechanism (200) to expand the sensor element (300) according to the pressure magnitude on the sensor element (300). The central control system is equipped with a sensor module, a data processing module, an alarm module, and a control module; The sensor module includes a pressure-receiving unit, and the pressure-receiving unit is used to obtain the pressure magnitude on the sensor element (300) and generate pressure information; The data processing module includes a downward pressure unit. A comparison strategy and a stretching strategy are provided in the downward pressure unit. The comparison strategy is used to obtain the pressure information, compare it with a pressure threshold, generate control information, and transmit the control information to the control module to control the telescopic member (202).

6. The annular sensor according to claim 5, wherein, The specific steps for controlling the telescopic member (202) based on the comparison strategy include: If the comparison strategy detects that the pressure received by the sensor element (300) is less than or equal to the pressure threshold, a power-on instruction is generated to control the telescopic member (202) to descend. When the telescopic member (202) descends, it exerts pressure on the mounting plate (2041) and causes the mounting plate (2041) to rotate, thereby driving a plurality of abutting blocks (2043) to expand outwards to expand the sensor element (300), for fixing the position of the sensor element (300) and eliminating the coupling force of the sensor element (300) in the installation sleeve (103).

7. A ring-shaped sensor according to claim 6, characterized in that, The specific steps for controlling the alarm module based on the comparison strategy include: If the comparison strategy detects that the pressure received by the sensor element (300) is greater than the pressure threshold, an alarm instruction is generated, and based on the alarm instruction, the alarm module is controlled to give an alarm to remind the staff to perform maintenance.

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