Spiral sensor for testing device and testing device

Abstract

The invention discloses a spiral sensor for a testing device and the testing device. The spiral sensor comprises a supporting column; the sliding rail and the supporting column are arranged in a spaced mode, and the extending direction of the sliding rail is parallel to the axial direction of the supporting column; the first optical fiber is spirally wound on the side surface of the supporting column; the light source assembly is connected with the end, close to the bottom of the supporting column, of the first optical fiber, and the light source assembly is suitable for sending optical signals into the first optical fiber; one end of the second optical fiber is in sliding connection with the sliding rail and vertically abuts against the first optical fiber, and the second optical fiber is suitable for measuring the power amount when the optical signal is transmitted in the first optical fiber. The spiral sensor for the testing device and the testing device disclosed by the invention are low in manufacturing cost, simple to install and easy to carry.

Description

Technical Field

[0001] The invention relates to the field of sensors, and in particular to a spiral sensor for a testing device and a testing device. Background Art

[0002] There are various technologies that can be used to measure vibration, among which electrical and mechanical sensors are the most common. In recent years, fiber optic sensors have become a promising alternative due to their inherent advantages such as immunity to electromagnetic interference, light weight, flexibility, ruggedness, and easy integration into various sensing applications. Fiber optic sensors are used in structural health monitoring applications to measure different parameters such as displacement, strain, crack width, humidity, and vibration.

[0003] However, the optical fiber sensors in the prior art are relatively expensive, have a complicated installation process and are relatively large in size. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one object of the present invention is to provide a spiral sensor for a test device. The sensor has low manufacturing cost, simple installation and is easy to carry.

[0005] Another object of the present invention is to provide a testing device.

[0006] According to a spiral sensor for a testing device proposed in the present invention, the spiral sensor includes: a support column; a slide rail, the slide rail is spaced apart from the support column, and the extension direction of the slide rail is parallel to the axial direction of the support column; a first optical fiber, the first optical fiber is spirally wound on the side of the support column; a light source assembly, the light source assembly is connected to one end of the first optical fiber close to the bottom of the support column, and the light source assembly is suitable for sending an optical signal into the first optical fiber; a second optical fiber, one end of the second optical fiber is slidably connected to the slide rail and vertically abuts against the first optical fiber, and the second optical fiber is suitable for measuring the power of the optical signal on the outer surface of the first optical fiber.

[0007] According to the spiral sensor and the testing device for the testing device provided by the embodiment of the present invention, a supporting column can be provided to provide a supporting platform for the first optical fiber, so that the first optical fiber is fixedly wound on the supporting column; by providing a slide rail, the second optical fiber can slide in the mounting hole formed by the two slide rail grooves along the axial direction of the supporting column; by providing the first optical fiber, a spiral structure can be formed, and the spiral structure can be used as the basic input of the spiral sensor; the first optical fiber is flexible and not easily damaged by bending or operation, and requires fewer installation steps, thereby simplifying the installation steps of the spiral sensor, thereby improving the practicality of the spiral sensor and reducing the cost of the spiral sensor at the same time; by providing a light source assembly, an optical signal can be sent into the first optical fiber, that is, the light source assembly can be used to illuminate the spiral structure of the spiral sensor, thereby serving as the main optical signal input for activating the spiral sensor; by providing the second optical fiber, the light beam inside the first optical fiber can be coupled at the bending ring of the first optical fiber, and the light intensity measured by the spiral sensor fluctuates with the reciprocating motion caused by the vibration of the second optical fiber, and the measurement data can be transmitted to the computer through the power meter, and the user can analyze the response of the spiral sensor to external vibration and its sensitivity to optical coupling changes based on the measurement data.

[0008] In some examples of the present invention, the spiral sensor further includes: a mounting base, and the support column and the slide rail are respectively connected to the mounting base.

[0009] In some examples of the present invention, the spiral sensor further includes: a slider, the slider is slidably connected to the slide rail, the slider is fixedly connected to one end of the second optical fiber, and the slider is suitable for driving one end of the second optical fiber to slide along the extension direction of the slide rail.

[0010] In some examples of the present invention, the testing device includes: a spiral sensor; a cantilever assembly, the cantilever assembly is connected to a slider of the spiral sensor, the cantilever assembly is suitable for driving the slider to slide so that the second optical fiber of the spiral sensor reciprocates axially along the supporting column of the spiral sensor; a driving assembly, the driving assembly is spaced apart from the cantilever assembly, and the driving assembly is suitable for driving the cantilever assembly to vibrate.

[0011] In some examples of the present invention, the cantilever assembly includes: a cantilever beam, one end of which is fixedly connected to the slider, and the cantilever beam is suitable for driving the slider to slide; and a fixed seat, which is fixedly connected to the other end of the cantilever beam away from the slider.

[0012] In some examples of the present invention, the driving assembly includes: a driving member, which is suitable for driving the cantilever beam to vibrate; a guide rail, which is spaced apart and arranged parallel to the cantilever beam, the driving member is movably connected to the guide rail, and the driving member is suitable for moving along the extension direction of the guide rail.

[0013] In some examples of the present invention, the driving assembly further includes: a roller, the roller is connected to the driving member, and the driving member moves relative to the guide rail through the roller.

[0014] In some examples of the present invention, the driving assembly also includes: a pulley, which is axially connected to the driving shaft of the driving member; a knocking member, one end of which is fixedly connected to the pulley, and the other end of the knocking member is suitable for abutting against the cantilever beam to drive the cantilever beam to vibrate.

[0015] In some examples of the present invention, the testing device further includes: a power meter connected to the other end of the second optical fiber away from the slider, and the power meter is suitable for measuring the power of the optical signal.

[0016] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, a brief introduction is given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 A schematic diagram of the structure of a spiral sensor provided by an embodiment of the present invention; Figure 2 A top view of a spiral sensor provided by an embodiment of the present invention; Figure 3 A schematic diagram of the structure of a testing device provided in an embodiment of the present invention; Figure 4 is the optical power coupling curve of the spiral structure; Figure 5 This is the vibration measurement curve of the spiral sensor response.

[0019] Description of reference numerals: 10-Testing device; 100-spiral sensor; 110-support column; 120-slide rail; 130-first optical fiber; 140-light source assembly; 150-second optical fiber; 160-mounting seat; 170-slider; 200-cantilever assembly; 210-cantilever beam; 220-fixed seat; 300-driving assembly; 310-driving member; 320-guide rail; 330-roller; 340-pulley; 350-knocking member; 400-Power meter. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0022] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0024] Figure 1 A schematic diagram of the structure of a spiral sensor provided by an embodiment of the present invention; Figure 2 A top view of a spiral sensor provided by an embodiment of the present invention; Figure 3 A schematic diagram of the structure of a testing device provided in an embodiment of the present invention.

[0025] Reference below Figure 1-Figure 5A spiral sensor 100 for a testing device 10 according to an embodiment of the present invention is described, comprising: a support column 110; a slide rail 120, the slide rail 120 is spaced apart from the support column 110, and the extension direction of the slide rail 120 is parallel to the axial direction of the support column 110; a first optical fiber 130, the first optical fiber 130 is spirally wound on the side of the support column 110; a light source assembly 140, the light source assembly 140 is connected to one end of the first optical fiber 130 close to the bottom of the support column 110, and the light source assembly 140 is suitable for sending an optical signal into the first optical fiber 130; a second optical fiber 150, one end of the second optical fiber 150 is slidably connected to the slide rail 120 and vertically abuts against the first optical fiber 130, and the second optical fiber 150 is suitable for measuring the power of the optical signal on the outer surface of the first optical fiber 130.

[0026] Specifically, the structure of the support column 110 can be configured as a cylindrical structure, and the structural material of the support column 110 can be metal or plastic. This embodiment of the present invention does not specifically limit this, and the user can select a suitable structural material according to the actual application scenario. The support column 110 can provide a support platform for the first optical fiber 130, so that the first optical fiber 130 is fixedly wound on the support column 110.

[0027] Furthermore, the slide rail 120 can be constructed as a rectangular structure with a groove on one side. The slide rail 120 can be spaced apart from the support column 110. It should be noted that the extension direction of the slide rail 120 should be parallel to the axial direction of the support column 110. The axial direction of the support column 110 can be Figure 1 In this way, the second optical fiber 150 can slide on the slide rail 120 along the axial direction of the support column 110. The construction material of the slide rail 120 can be metal or plastic, which is not specifically limited in the embodiment of the present invention, and the user can select different materials according to different application scenarios.

[0028] Please continue to see Figure 1 and Figure 2 As shown, the number of the slide rails 120 can be one or two, which is not specifically limited in the embodiment of the present invention, and the following embodiment is explained by taking two as an example. The two slide rails 120 can be installed with grooves spaced relative to each other, so that the second optical fiber 150 can slide along the axial direction of the support column 110 in the installation hole (not shown in the figure) formed by the grooves of the two slide rails 120.

[0029] The first optical fiber 130 can be arranged around the side of the support column 110 in a spiral winding manner. The side can also be understood as the peripheral surface of the support column 110, so that a spiral structure can be formed. The spiral structure can be used as the basic input of the spiral sensor 100. At the bending ring of the first optical fiber 130, according to the bending loss theory, the optical power will have variable loss when the light propagates inside the first optical fiber 130. That is, the light loss amount of each circle of the first optical fiber 130 wound on the side of the support column 110 is different, wherein the first circle of the bending ring experiences the highest degree of optical power loss in the first optical fiber 130 of the spiral structure, and the subsequent bending ring loss gradually decreases.

[0030] The first optical fiber 130 can be a polymer optical fiber, which is a new type of optical fiber transmission medium. The material cost of polymer optical fiber is lower and the manufacturing process is simpler. The polymer optical fiber is lighter, more flexible, not easy to break, and has good bendability. The polymer optical fiber has stronger tensile resistance and vibration tolerance, and is suitable for data transmission in strong vibration scenarios. The spiral sensor 100 designed with polymer optical fiber is flexible, not easily damaged by bending or operation, and requires fewer installation steps, thereby simplifying the installation steps of the spiral sensor 100, thereby improving the practicality of the spiral sensor 100 and simultaneously reducing the manufacturing cost of the spiral sensor 100.

[0031] The light source assembly 140 can be an LED light source. The light source assembly 140 can be fixedly connected to one end of the first optical fiber 130 near the bottom of the support column 110 by means of optical fiber end-to-end connection. The light source assembly 140 is suitable for sending an optical signal into the first optical fiber 130, that is, the light source assembly 140 can be used to illuminate the spiral structure of the spiral sensor 100, so as to serve as the main optical signal input for activating the spiral sensor 100. The optical power of the spiral structure can be activated by turning on the light source assembly 140, and the optical power is the loss at each bending ring of the spiral structure. Therefore, the second optical fiber 150 can couple the optical power of the outer surface of the first optical fiber 130.

[0032] Specifically, turning on the light source assembly 140 can transmit an optical signal to the inside of the first optical fiber 130, and each bending ring on the outer surface of the first optical fiber 130 will have different optical powers. The optical power is the largest at the bending ring close to the light source assembly 140, and the optical power decreases successively along the height direction of the support column 110. The second optical fiber 150 can measure vibration by coupling the optical power of the bending rings at different positions on the outer surface of the first optical fiber 130.

[0033] Furthermore, one end of the second optical fiber 150 can be slidably installed in a groove (not shown in the figure) of the slide rail 120 through the slider 170, so that the second optical fiber 150 can slide in the groove of the slide rail 120. It should be noted that the end of the second optical fiber 150 close to the slider 170 should be vertically abutted against the first optical fiber 130, so that when measuring vibration, light can be coupled based on the surface coupling principle, that is, the second optical fiber 150 and the light beam inside the first optical fiber 130 can be coupled at the bending ring of the first optical fiber 130, so that the light beam inside the first optical fiber 130 can exchange energy between the bending ring and the second optical fiber 150.

[0034] When the second optical fiber 150 is positioned vertically with the first optical fiber 130, one end of the second optical fiber 150 can be supported by the slide rail 120, and one end of the second optical fiber 150 can be driven by the cantilever assembly 200 to perform simulated vibration, and can synchronously make reciprocating motion on the bending ring of the first optical fiber 130 along the axial direction of the support column 110 while vibrating. In order to quantify the light intensity coupled between the second optical fiber 150 and the first optical fiber 130, the other end of the second optical fiber 150 can be connected to the power meter 400. With such a configuration, the light intensity measured by the spiral sensor 100 fluctuates with the reciprocating motion caused by the vibration of the second optical fiber 150, and the measurement data can be transmitted to a computer (not shown in the figure) through the power meter 400. With such a configuration, the user can analyze the response of the spiral sensor 100 to external vibrations and its sensitivity to changes in optical coupling based on the measurement data.

[0035] According to the spiral sensor 100 for the test device 10 and the test device 10 provided by the embodiment of the present invention, a support platform can be provided for the first optical fiber 130 by setting the support column 110, so that the first optical fiber 130 is spirally wound on the support column 110; by setting the slide rail 120, it is convenient for the second optical fiber 150 to slide along the axial direction of the support column 110 in the mounting hole (not shown in the figure) formed by the groove of the slide rail 120; by setting the first optical fiber 130, a spiral structure can be formed, and the spiral structure can be used as the basic input of the spiral sensor 100. The first optical fiber 130 is flexible and not easily damaged by bending or operation, and requires fewer installation steps, thereby simplifying the installation steps of the spiral sensor 100, and further improving the spiral sensor 1 00, and simultaneously reduce the cost of the spiral sensor 100; by setting the light source component 140, an optical signal can be sent into the first optical fiber 130, that is, the light source component 140 can be used to illuminate the spiral structure of the spiral sensor 100, so that it can be used as the main optical signal input for activating the spiral sensor 100; by setting the second optical fiber 150, the light beam inside the first optical fiber 130 can be coupled at the bending ring of the first optical fiber 130, and the light intensity measured by the spiral sensor 100 fluctuates with the reciprocating motion caused by the vibration of the second optical fiber 150. The measurement data can be transmitted to the computer through the power meter 400, and the user can analyze the response of the spiral sensor 100 to external vibrations and its sensitivity to changes in optical coupling based on the measurement data.

[0036] Please continue to participate Figure 1-Figure 2 As shown, the spiral sensor 100 further includes: a mounting base 160 , and the support column 110 and the slide rail 120 are respectively connected to the mounting base 160 .

[0037] It should be noted that the mounting base 160 can be constructed as a rectangular structure, and the structural material of the mounting base 160 can be metal or plastic, for example, stainless steel. Stainless steel has good corrosion resistance and high hardness, which can improve the service life of the spiral sensor 100. This embodiment of the present invention does not specifically limit this. The support column 110 and the slide rail 120 can be fixedly connected to the mounting base 160 by welding, riveting, etc. The mounting base 160 can provide a support platform for the support column 110 and the slide rail 120, so that the spiral sensor 100 can be more stable when in use, thereby improving the practicality and stability of the spiral sensor 100.

[0038] Please continue to see Figure 1 and Figure 2 As shown, according to one embodiment of the present invention, the spiral sensor 100 also includes: a slider 170, the slider 170 is slidably connected to the slide rail 120, the slider 170 is fixedly connected to one end of the second optical fiber 150, and the slider 170 is suitable for driving one end of the second optical fiber 150 to slide along the extension direction of the slide rail 120.

[0039] Specifically, the slider 170 can be constructed as a T-shaped tube structure with a circular through hole in the middle. The construction material of the slider 170 can be metal or plastic. The embodiment of the present invention does not specifically limit this. The user can choose different construction materials according to different application scenarios. The slider 170 can be slidably installed in the mounting hole formed by the grooves of the two slide rails 120, so that the slider 170 can slide on the slide rail 120 along the axial direction of the slide rail 120. One end of the second optical fiber 150 can be fixedly connected to the slider 170 by a coaxial connection. With this arrangement, the slider 170 can drive one end of the second optical fiber 150 to slide on the slide rail 120 along the axial direction of the slide rail 120.

[0040] Please continue to see Figure 3 As shown, according to another embodiment of the present invention, the testing device 10 includes: a spiral sensor 100; a cantilever assembly 200, the cantilever assembly 200 is connected to the slider 170 of the spiral sensor 100, and the cantilever assembly 200 is suitable for driving the slider 170 to slide so that the second optical fiber 150 of the spiral sensor 100 reciprocates along the axial direction of the supporting column 110 of the spiral sensor 100; and a driving assembly 300, the driving assembly 300 is spaced apart from the cantilever assembly 200, and the driving assembly 300 is suitable for driving the cantilever assembly 200 to vibrate.

[0041] The test device 10 provided according to the embodiment of the invention includes the spiral sensor 100 used for the test device 10 in the above embodiment, wherein the specific structure and working principle of the spiral sensor 100 have been explained in detail in the above embodiment and will not be repeated here.

[0042] Furthermore, the cantilever beam 210 of the cantilever assembly 200 can be fixedly connected to the slider 170 of the spiral sensor 100 by welding or the like, and the cantilever assembly 200 can generate vibrations, thereby driving the slider 170 to slide along the axial direction of the support column 110, that is, the cantilever assembly 200 can drive the second optical fiber 150 to slide along the axial direction of the support column 110, and the second optical fiber 150 is vertically abutted against the first optical fiber 130. The vibration of the cantilever assembly 200 can drive the second optical fiber 150 to move back and forth at the bending ring of the first optical fiber 130.

[0043] It should be noted that the drive assembly 300 can be spaced apart from the cantilever assembly 200, and the drive assembly 300 can drive the cantilever assembly 200 to vibrate. The drive assembly 300 and the cantilever assembly 200 can cooperate to simulate different vibration modes, thereby improving the practicality of the test device 10.

[0044] Please continue to see Figure 3As shown, according to another embodiment of the present invention, the cantilever assembly 200 includes: a cantilever beam 210, one end of which is fixedly connected to the slider 170, and the cantilever beam 210 is suitable for driving the slider 170 to slide; a fixed seat 220, and the fixed seat 220 is fixedly connected to the other end of the cantilever beam 210 away from the slider 170.

[0045] Specifically, the cantilever beam 210 can be constructed as a rectangular strip structure, and the construction material of the cantilever beam 210 can be a metal material, such as iron, copper, and brass, etc., which is not specifically limited in the embodiment of the present invention, and the user can select different construction materials according to different application scenarios. One end of the cantilever beam 210 can be fixedly connected to the slider 170 by welding, threaded connection, etc., and the cantilever beam 210 can drive the slider 170 to slide along the axial direction of the support column 110, that is, the cantilever beam 210 can transmit the real vibration to the second optical fiber 150, which makes it easier for the spiral sensor 100 to measure the real vibration.

[0046] Furthermore, the fixed seat 220 can be constructed as a rectangular structure with a rectangular groove on one side, and the other end of the cantilever beam 210 away from the slider 170 can be fixedly connected to the fixed seat 220 by welding, riveting, etc. With this arrangement, the fixed seat 220 can provide support for the cantilever beam 210, thereby facilitating the vibration of the cantilever beam 210.

[0047] Please continue to see Figure 3 As shown, according to an optional embodiment of the present invention, the driving component 300 includes: a driving member 310, the driving member 310 is suitable for driving the cantilever beam 210 to vibrate; a guide rail 320, the guide rail 320 is spaced apart and arranged in parallel with the cantilever beam 210, the driving member 310 is movably connected to the guide rail 320, and the driving member 310 is suitable for moving along the extension direction of the guide rail 320.

[0048] Specifically, the driving member 310 may be a motor, and the driving member 310 may drive the cantilever beam 210 to generate vibration. It should be noted that the user may replace different driving members 310 and cantilever beams 210 to generate different vibrations, so that different types of vibrations may be detected, such as front and rear vibrations, oscillations, etc., thereby improving the practicality of the testing device 10.

[0049] Further, the guide rail 320 can be arranged in parallel with the cantilever beam 210 at intervals, the number of the guide rails 320 can be two, and the two guide rails 320 can be arranged at intervals, and the driving member 310 can be slidably connected to the guide rail 320 through the roller 330, so that the driving member 310 can slide along the extension direction of the guide rail 320. A pulley 340 can be connected to the driving shaft of the driving member 310, and a knocking member 350 is fixed on the pulley 340. The driving member 310 drives the driving shaft to rotate, and the driving shaft rotation drives the knocking member 350 to rotate. The knocking member 350 will knock the cantilever beam 210 every time it rotates, so that vibration can be generated. In this way, the driving member 310 can slide along the guide rail 320 to generate vibrations of different intensities. When the driving member 310 is close to the connection position of the cantilever beam 210 and the slider 170, a greater vibration will be generated. Further, when it is far away from the connection position of the cantilever beam 210 and the slider 170, a smaller vibration will be generated, so that a variety of simulated vibrations of the test device 10 can be achieved.

[0050] Please continue to see Figure 3 As shown, according to a further embodiment of the present invention, the driving assembly 300 further includes: a roller 330 , the roller 330 is connected to the driving member 310 , and the driving member 310 moves relative to the guide rail 320 via the roller 330 .

[0051] Specifically, the roller 330 can be rotatably connected to the connecting plate (not shown in the figure) by coaxial sleeve connection, and the driving member 310 can be fixedly connected to the connecting plate by welding, riveting, threaded connection, etc., so that the driving member 310 can achieve reciprocating sliding through the roller. The number of rollers 330 can be four, which are respectively installed in pairs on both sides of the bottom of the connecting plate. The rollers 330 can be slidably installed with the guide rail 320, so that the driving member 310 can slide on the guide rail 320. The reciprocating sliding of the driving member 310 can simulate vibrations of different degrees, thereby increasing the practicality of the test device 10.

[0052] Please continue to see Figure 3 As shown, in an optional embodiment of the present invention, the driving assembly 300 also includes: a pulley 340, which is axially connected to the driving shaft of the driving member 310; and a knocking member 350, one end of which is fixedly connected to the pulley 340, and the other end of the knocking member 350 is suitable for abutting against the cantilever beam 210 to drive the cantilever beam 210 to vibrate.

[0053] Specifically, the pulley 340 can be constructed as a cylindrical shape with different cross-sectional areas at both ends. The cross-sectional area of ​​one end of the pulley 340 should be slightly larger than the cross-sectional area of ​​the drive shaft. In this way, one end of the pulley 340 can be connected to the drive shaft of the driving member 310 by coaxial connection, and the other end of the pulley 340 can be fixedly installed with a knocking member 350. It should be noted that the knocking member 350 can be constructed as a rectangular strip structure, and the knocking member 350 can be fixedly connected to the pulley 340 by adhesive bonding. The driving member 310 drives the driving shaft to rotate, and the driving shaft drives the pulley 340 to rotate, so that the knocking member 350 can be driven to knock the cantilever beam 210, and then vibration can be continuously generated. It should be noted that the length of the knocking piece 350 should be smaller than the height from the drive shaft to the guide rail 320, and slightly larger than the distance from the drive shaft to the cantilever beam 210. This can ensure that the cantilever beam 210 is knocked by the knocking piece 350 when the drive shaft drives it to rotate, while preventing the guide rail 320 from being knocked and damaged when the drive shaft drives the knocking piece 350 to rotate, thereby increasing the safety of the testing device 10.

[0054] Please continue to see Figure 3 As shown, in some examples of the present invention, the testing device 10 further includes a power meter 400 , which is connected to the other end of the second optical fiber 150 away from the slider 170 , and is suitable for measuring the power of the optical signal.

[0055] Specifically, the power meter 400 can be connected to the other end of the second optical fiber 150 away from the slider 170, and the power meter 400 can measure the optical power data of the second optical fiber 150 and the first optical fiber 130. The other end of the power meter 400 can be connected to a computer, and the power meter 400 can transmit the measured data to the computer to record the optical power change, so that the vibration movement can be detected through the optical power coupling change. The data measured by the power meter 400 can fluctuate with the reciprocating motion caused by the vibration of the second optical fiber 150, so as to provide an analysis of the spiral sensor 100's response to external vibration and its sensitivity to optical coupling changes.

[0056] Please continue to see Figure 4 As shown, in some examples of the present invention, Figure 4 The figure shows the variation of the power coupling intensity with the height of the spiral sensor 100. The spiral structure of the spiral sensor 100 has 11 bending rings in total, and the height of each bending ring is 1 mm. Figure 4The relationship between the power coupling intensity and the change of the bending loop is combined. The Y-axis can represent the power coupling intensity in microwatts (μW), and the X-axis can represent the displacement of the sensor. The optical power coupling is recorded from the first bending loop. At the initial bending loop, the optical power can be coupled at a maximum level because the first bending loop faces higher bending losses. In addition, when the second optical fiber 150 changes from the first bending loop to the last bending loop of the spiral structure, the optical power coupling intensity will continue to decay.

[0057] It is worth noting that the intensity of the optical power coupling changes as the bending loop changes. At each bending loop, the second optical fiber 150 couples a variable optical power intensity. Vibration can be effectively induced by the variable optical power coupling intensity of the second optical fiber 150, simply by applying the vibration motion to the second optical fiber 150. When the second optical fiber 150 vibrates, it continuously changes the position of the second optical fiber 150 in different bending loops of the spiral structure, thereby coupling a variable optical power. Fluctuations in the optical power coupling indicate the presence of vibration.

[0058] Please continue to see Figure 5 As shown, Figure 5 The response of the spiral sensor 100 to the vibration motion is shown. In order to generate vibration, the knocking member 350 continuously strikes the cantilever beam 210, and the vibration of the cantilever beam 210 is transmitted to the second optical fiber 150 to generate reciprocating motion. Due to the reciprocating motion, the second optical fiber 150 begins to couple a variable amount of optical power at different bending rings of the spiral structure. The maximum and minimum power intensities are 10.54 µW and 1.83 µW, respectively. These maximum and minimum power intensities indicate that, at the peak of the vibration, the second optical fiber 150 can slide in the height direction of the spiral sensor 100, so that all the bending rings of the first optical fiber 130 can be covered.

[0059] The spiral sensor 100 used for the test device 10 according to the embodiment of the present invention and other components of the test device 10, such as the surface coupling principle, bending loss theory, etc., as well as operations are well known to those skilled in the art and will not be described in detail here.

[0060] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0061] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A spiral sensor for a test device, characterized in that: include: Support columns; A slide rail, wherein the slide rail is spaced apart from the support column, and an extending direction of the slide rail is parallel to an axial direction of the support column; A first optical fiber, wherein the first optical fiber is spirally wound on a side of the support column; A light source assembly, the light source assembly is connected to an end of the first optical fiber close to the bottom of the support column, and the light source assembly is suitable for sending an optical signal into the first optical fiber; A second optical fiber, one end of which is slidably connected to the slide rail and vertically abuts against the first optical fiber, and the second optical fiber is suitable for measuring the power of the optical signal on the outer surface of the first optical fiber.

2. The spiral sensor for testing a device according to claim 1, characterized in that: Also includes: The mounting seat is connected to the support column and the slide rail respectively.

3. The spiral sensor for testing a device according to claim 2, characterized in that: Also includes: A slider is slidably connected to the slide rail, the slider is fixedly connected to one end of the second optical fiber, and the slider is suitable for driving one end of the second optical fiber to slide along the extension direction of the slide rail.

4. A testing device, characterized in that: include: A spiral sensor, wherein the spiral sensor is a spiral sensor for a testing device according to any one of claims 1 to 3; A cantilever assembly, the cantilever assembly is connected to a slider of the spiral sensor, and the cantilever assembly is adapted to drive the slider to slide so as to make the second optical fiber of the spiral sensor reciprocate along the axial direction of the supporting column of the spiral sensor; A driving assembly is arranged at a distance from the cantilever assembly, and the driving assembly is suitable for driving the cantilever assembly to vibrate.

5. A testing device according to claim 4, characterized in that: The cantilever assembly comprises: A cantilever beam, one end of which is fixedly connected to the slider, and the cantilever beam is suitable for driving the slider to slide; A fixed seat is fixedly connected to the other end of the cantilever beam away from the sliding block.

6. A testing device according to claim 4, characterized in that: The drive assembly comprises: A driving member, wherein the driving member is adapted to drive the cantilever beam to vibrate; The guide rail is spaced apart from and arranged in parallel with the cantilever beam, the driving member is movably connected to the guide rail, and the driving member is suitable for moving along the extension direction of the guide rail.

7. A testing device according to claim 6, characterized in that: The drive assembly also includes: A roller is connected to the driving member, and the driving member moves relative to the guide rail through the roller.

8. A testing device according to claim 6, characterized in that: The drive assembly also includes: A pulley, the pulley being axially connected to a driving shaft of the driving member; A knocking piece, one end of which is fixedly connected to the pulley, and the other end of which is suitable for abutting against the cantilever beam to drive the cantilever beam to vibrate.

9. A testing device according to claim 4, characterized in that: Also includes: A power meter is connected to the other end of the second optical fiber away from the slider, and the power meter is suitable for measuring the power of the optical signal.

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