Test apparatus for simulating polarization maintaining fiber vibrations

Abstract

The application discloses a kind of test devices of simulating polarization maintaining optical fiber vibration, including base, base is equipped with power component, reduction gear mechanism, crank rocker mechanism and polarization maintaining optical fiber, reduction gear mechanism constitutes the multistage gear meshing transmission of deceleration, the head of reduction gear mechanism is accessed power component, crank rocker mechanism includes first crank rocker and second crank rocker, the tail of reduction gear mechanism is connected with first crank rocker, drives first crank rocker to make circular motion, and second crank rocker hinged with first crank rocker makes linear reciprocating motion, polarization maintaining optical fiber both ends are fixed on base, and any point between both ends is connected on second crank rocker.The test device provided by the application simulates external mechanical vibration by setting speed regulating button, reduction gear mechanism and crank rocker mechanism, vibration amplitude is controllable, and vibration frequency is adjustable, so as to realize quantitative, accurate research on polarization maintaining optical fiber stability.

Description

Technical Field

[0001] This invention belongs to the field of mechanical vibration, and specifically relates to a test device for simulating the vibration of polarization-maintaining optical fibers. Background Technology

[0002] Polarization-maintaining fiber (PSB) is a special type of optical fiber capable of transmitting linearly polarized light, widely used in various sectors of the national economy, including aerospace, aviation, marine, industrial manufacturing, and communications. In interferometric fiber optic sensors based on optical coherence detection, PSSB ensures the linear polarization direction remains unchanged, improving the coherence signal-to-noise ratio and enabling high-precision measurement of physical quantities. As a special type of fiber, PSSB is primarily used in sensors such as fiber optic gyroscopes and fiber optic hydrophones, as well as fiber optic communication systems such as DWDM and EDFA. However, the transmission accuracy of PSSB is susceptible to interference from external factors; for example, vibration and temperature can affect its transmission.

[0003] Currently, research on the stability of optical signals transmitted through polarization-maintaining fibers based on vibration employs methods to simulate mechanical vibration, such as striking a tabletop or throwing the polarization-maintaining fiber into free fall. However, these methods suffer from limitations in controlling the vibration mode, amplitude, and frequency, making it difficult to accurately study the impact of mechanical vibration on the stability of polarization-maintaining fibers. Summary of the Invention

[0004] The purpose of this invention is to provide a test apparatus for simulating the vibration of polarization-maintaining optical fibers, which can accurately study the influence of mechanical vibration on the stability of polarization-maintaining optical fibers.

[0005] The technical solution adopted by this invention to solve its technical problem is: a test device for simulating the vibration of polarization-maintaining optical fiber, including a base, characterized in that: a power component, a reduction gear mechanism, a crank-rocker mechanism and a polarization-maintaining optical fiber are provided on the base; the reduction gear mechanism constitutes a multi-stage gear meshing transmission for reduction; the head of the reduction gear mechanism is connected to the power component; the crank-rocker mechanism includes a first crank-rocker and a second crank-rocker; the tail of the reduction gear mechanism is hinged to the first crank-rocker, driving the first crank-rocker to perform circular motion; the second crank-rocker, which is hinged to the first crank-rocker, performs linear reciprocating motion; the two ends of the polarization-maintaining optical fiber are fixed on the base, and any point between the two ends is connected to the second crank-rocker.

[0006] Preferably, the power assembly includes a circuit board, an electric motor, and a main gear. The circuit board is electrically connected to the electric motor, and the main gear is connected to the output shaft of the electric motor.

[0007] Preferably, the circuit board is equipped with a speed control button for adjusting the speed of the electric motor.

[0008] Preferably, the reduction gear mechanism includes a power input gear set, a first-stage reduction gear set, a second-stage reduction gear set, a third-stage reduction gear set, a fourth-stage reduction gear set, and a power output gear that mesh and drive in sequence. Each of the power input gear set, the first-stage reduction gear set, the second-stage reduction gear set, the third-stage reduction gear set, and the fourth-stage reduction gear set includes a large gear and a small gear that rotate coaxially. The diameter of the large gear is larger than that of the small gear. The main gear of the power component meshes and drives the large gear of the power input gear set, and the large gear of the lower stage meshes and drives the small gear of the upper stage.

[0009] Preferably, the larger gear is on top and the smaller gear is on the bottom.

[0010] Preferably, the parameters of the large gears in the power input gear set, the first-stage reduction gear set, the second-stage reduction gear set, the third-stage reduction gear set, and the fourth-stage reduction gear set are: module 0.2, number of teeth 33, tooth width 1mm, and pressure angle 25°; the parameters of the small gears in the power input gear set, the first-stage reduction gear set, the second-stage reduction gear set, and the third-stage reduction gear set are: module 0.2, number of teeth 15, tooth width 1mm, and pressure angle 25°; and the parameters of the small gear and the power output gear in the fourth-stage reduction gear set are: module 0.2, number of teeth 23, tooth width 1mm, and pressure angle 25°.

[0011] Preferably, the shafts of the power input gear set, the first-stage reduction gear set, the second-stage reduction gear set, the third-stage reduction gear set, the fourth-stage reduction gear set, and the power output gear are vertically mounted on the base and located on the same horizontal line.

[0012] Preferably, the reduction gear mechanism includes a disc, which is disposed on the top of the shaft of the power output gear and rotates coaxially. The center of the disc is on the same axis as the axis of the shaft. A protrusion is provided on the top edge of the disc, and the first crank rocker is hinged to the protrusion.

[0013] Preferably, the crank-rocker mechanism is provided with a limiting frame and a limiting sleeve. The limiting frame is mounted on the base, and the limiting sleeve is located at the top of the limiting frame. The second crank-rocker can reciprocate through the limiting sleeve.

[0014] The beneficial effects of this invention are:

[0015] The experimental device provided by this invention simulates external mechanical vibration by setting up a reduction gear mechanism and a crank rocker mechanism. The vibration amplitude is controllable and the vibration frequency is adjustable, thereby realizing quantitative and precise research on the stability of polarization-maintaining optical fibers. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the experimental device for simulating the vibration of polarization-maintaining optical fiber according to the present invention.

[0017] Figure 2 This is a schematic diagram of the power component structure of the experimental device for simulating the vibration of polarization-maintaining optical fiber according to the present invention.

[0018] Figure 3 This is a schematic diagram of the reduction gear mechanism of the experimental device for simulating the vibration of polarization-maintaining optical fiber according to the present invention.

[0019] Figure 4 This is a schematic diagram of the crank-rocker mechanism of the experimental device for simulating the vibration of polarization-maintaining optical fiber according to the present invention.

[0020] The diagram shows: Base 1, Power Component 11, Circuit Board 111, Electric Motor 112, Main Gear 113, Speed ​​Control Button 114; Reduction Gear Mechanism 12, Power Input Gear Set 121, First-Stage Reduction Gear Set 122, Second-Stage Reduction Gear Set 123, Third-Stage Reduction Gear Set 124, Fourth-Stage Reduction Gear Set 125, Power Output Gear 126, Shaft 1211, Large Gear 1212, Small Gear 1213, Disc 127, Protrusion 128; Crank-Rocker Mechanism 13, First Crank-Rocker 131, Second Crank-Rocker 132, Limiting Frame 133, Limiting Sleeve 134; Polarization Maintaining Fiber Optic 14. Detailed Implementation

[0021] The following description further illustrates the structures involved in this invention and the technical terms used therein. These descriptions are merely illustrative of how the invention is implemented and do not constitute any limitation on the invention.

[0022] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. In the description of the present invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," and "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the indicated position or element must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0023] In this invention, unless otherwise explicitly specified and limited, terms such as "connection" and "fixation" should be interpreted broadly. For example, "fixation" can refer to a fixed connection, a detachable connection, or an integral part; it can be a direct connection or an indirect connection through an intermediate medium; it can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0024] like Figure 1-4As shown, the test device for simulating the vibration of polarization-maintaining fiber includes a base 1. The base 1 is equipped with a power assembly 11, a reduction gear mechanism 12, a crank-rocker mechanism 13, and a polarization-maintaining fiber 14. The reduction gear mechanism 12 forms a multi-stage gear meshing transmission for speed reduction. The head of the reduction gear mechanism 12 is connected to the power assembly 11. The crank-rocker mechanism 13 includes a first crank-rocker 131 and a second crank-rocker 132. The tail of the reduction gear mechanism 12 is hinged to the first crank-rocker 131, driving the first crank-rocker 131 to perform circular motion. The second crank-rocker 132, which is hinged to the first crank-rocker 131, performs linear reciprocating motion. The two ends of the polarization-maintaining fiber 14 are fixed on the base 1, and any point between the two ends is connected to the second crank-rocker 132.

[0025] The experimental device provided by the present invention simulates external mechanical vibration by setting a speed adjustment button, a reduction gear mechanism 12 and a crank rocker mechanism 13. The vibration amplitude is controllable and the vibration frequency is adjustable, so as to quantitatively and accurately study the influence of mechanical vibration on the stability of polarization-maintaining optical fiber 14.

[0026] As a specific embodiment, the power assembly 11 includes a circuit board 111, an electric motor 112, and a main gear 113. The circuit board 111 is electrically connected to the electric motor 112, and the main gear 113 is connected to the output shaft of the electric motor 112. See [link to relevant documentation]. Figure 2 When connected to an external power source, providing power to the entire device, the output current, controlled by circuit board 111, meets the voltage and frequency requirements of the motor standard.

[0027] As a specific embodiment, the circuit board 111 is provided with a speed adjustment button 114 for adjusting the rotational speed of the electric motor 112. The rotational speed of the electric motor 112 can be controlled by controlling the speed adjustment button 114, which means the vibration frequency can be controlled, thereby achieving the purpose of quantitatively studying the stability of polarization-maintaining optical fiber.

[0028] As a specific example, such as Figure 3As shown, the reduction gear mechanism 12 includes a power input gear set 121, a first-stage reduction gear set 122, a second-stage reduction gear set 123, a third-stage reduction gear set 124, a fourth-stage reduction gear set 125, and a power output gear 126 that mesh sequentially. Each of the power input gear set 121, first-stage reduction gear set 122, second-stage reduction gear set 123, third-stage reduction gear set 124, and fourth-stage reduction gear set 125 includes a large gear 1212 and a small gear 1213 of different diameters that rotate coaxially 1211, with the large gear 1212 on top and the small gear 1213 on the bottom. The main gear 113 of the power assembly 11 meshes with the large gear of the power input gear set 126, and the lower-stage large gear meshes with the upper-stage small gear. The large gear has a larger diameter than the small gear, is fixed on a shaft, and rotates synchronously. When the large gear in the power input gear set rotates at a certain linear velocity, the small gear rotates at a smaller linear velocity and transmits power to the large gear in the first-stage reduction gear set. Similarly, the small gear in the first-stage reduction gear set 122 will rotate at a lower linear velocity and transmit power to the large gear in the second-stage reduction gear set 123. This continues until the power is transmitted to the power output gear 126, whose shaft eventually rotates at a lower frequency, thus meeting the vibration frequency requirements for studying the stability of polarization-maintaining optical fibers.

[0029] As a specific embodiment, the parameters of the large gears in the power input gear set 121, the first-stage reduction gear set 122, the second-stage reduction gear set 123, the third-stage reduction gear set 124, and the fourth-stage reduction gear set 125 are: module 0.2, number of teeth 33, tooth width 1mm, and pressure angle 25°. The parameters of the small gears in the power input gear set 121, the first-stage reduction gear set 122, the second-stage reduction gear set 123, and the third-stage reduction gear set 124 are: module 0.2, number of teeth 15, tooth width 1mm, and pressure angle 25°. The parameters of the small gear and the power output gear 126 in the fourth-stage reduction gear set 125 are: module 0.2, number of teeth 23, tooth width 1mm, and pressure angle 25°. Of course, this is only one embodiment, and the gear parameters can be determined according to actual needs.

[0030] In a specific embodiment, the shafts of the power input gear set 121, the first-stage reduction gear set 122, the second-stage reduction gear set 123, the third-stage reduction gear set 124, the fourth-stage reduction gear set 125, and the power output gear 126 are vertically mounted on the base 1 and located on the same horizontal line.

[0031] In one specific embodiment, the reduction gear mechanism 12 includes a disc 127, which is disposed on the top of the shaft of the power output gear 126 and rotates coaxially. The center of the disc 127 is on the same axis as the shaft. A protrusion 128 is provided on the top edge of the disc 127, and the first crank rocker arm 131 is hinged to the protrusion 128. In one specific embodiment, the diameter of the disc 127 is 30mm, and the specific diameter and length can be determined according to actual needs.

[0032] As a specific example, such as Figure 4 As shown, the crank-rocker mechanism 13 is provided with a limiting frame 133 and a limiting sleeve 134. The limiting frame 133 is located on the base 1, and the limiting sleeve 134 is located on top of the limiting frame 134. The second crank-rocker 132 can reciprocate through the limiting sleeve 133. The first crank-rocker 131 can move in a circular motion with the disk 127, while the second crank-rocker 132 is limited to a linear motion direction by the limiting sleeve. Specifically, one end of the first crank-rocker 131 is hinged to the protrusion 128 on the disk, and the other end is hinged to one end of the second crank-rocker 132. The other end of the second crank-rocker 132 passes through the limiting sleeve 134 and is connected to the polarization-maintaining optical fiber 4.

[0033] The two ports of the polarization-maintaining fiber 14 are used for optical signal input and output, respectively. In practical applications, since both ends are fixed, vibration simulation is performed at any position in the middle section of the polarization-maintaining fiber 14, that is, between the two ends.

[0034] The working process of this invention is as follows: When the power is turned on, the electric motor 112 drives the main gear 113 to start rotating. The speed is reduced by the reduction gear mechanism 12, while the torque of the crank rocker is increased to ensure that the polarization-maintaining fiber will not break during vibration. When the disk 127 rotates one revolution, the first crank rocker 131 drives the second crank rocker 132 to complete a round-trip mechanical motion process, thereby studying the stability of the polarization-maintaining fiber. Specifically: when the fixed point of the disk 127 and the first crank rocker 131 is farthest from the limit frame, the vibration begins. When the disk 127 rotates 180°, the right end of the second crank rocker 132 extends to the farthest point, completing the first half of the pushing process. When the disk 127 rotates the remaining 180°, the right end of the second crank rocker 132 returns to the initial position, completing the second half of the retraction process, ultimately forming a complete mechanical vibration.

[0035] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. Test apparatus for simulating polarization maintaining optical fiber vibration, comprising a base, characterized in that: The base is provided with a power assembly, a speed reduction gear mechanism, a crank rocker mechanism and a polarization maintaining optical fiber. The speed reduction gear mechanism comprises a plurality of speed reduction gear meshes. The first end of the speed reduction gear mechanism is connected to the power assembly. The crank rocker mechanism comprises a first crank rocker and a second crank rocker. The first end of the speed reduction gear mechanism is connected to the first crank rocker to drive the first crank rocker to rotate in a circle. The second crank rocker is connected to the second end of the speed reduction gear mechanism to drive the second crank rocker to move in a straight line. The polarization maintaining optical fiber is fixed at the two ends of the base and connected to the second crank rocker at any position between the two ends. The speed reduction gear mechanism comprises a power input gear set, a first speed reduction gear set, a second speed reduction gear set, a third speed reduction gear set, a fourth speed reduction gear set and a power output gear set. The power input gear set, the first speed reduction gear set, the second speed reduction gear set, the third speed reduction gear set and the fourth speed reduction gear set all comprise a large gear and a small gear which rotate coaxially. The diameter of the large gear is larger than that of the small gear. The large gear of the power input gear set is connected to the main gear of the power assembly. The large gear of the lower gear set is connected to the small gear of the upper gear set. The parameters of the large gears in the power input gear set, the first speed reduction gear set, the second speed reduction gear set, the third speed reduction gear set and the fourth speed reduction gear set are as follows: a module of 0.2, a number of teeth of 33, a tooth width of 1mm and a pressure angle of 25°. The parameters of the small gears in the power input gear set, the first speed reduction gear set, the second speed reduction gear set and the third speed reduction gear set are as follows: a module of 0.2, a number of teeth of 15, a tooth width of 1mm and a pressure angle of 25°. The parameters of the small gears in the fourth speed reduction gear set and the power output gear set are as follows: a module of 0.2, a number of teeth of 23, a tooth width of 1mm and a pressure angle of 25°. The speed reduction gear mechanism comprises a disc which is coaxially arranged on the top of the shaft of the power output gear set. The center of the disc is on the same axis as the center of the shaft. The top edge of the disc is provided with a convex column. The first crank rocker is connected to the convex column. The crank rocker mechanism is provided with a limiting frame and a limiting sleeve. The limiting frame is arranged on the base. The limiting sleeve is arranged on the top of the limiting frame. The second crank rocker can move in and out of the limiting sleeve.

2. The test apparatus for simulating polarization maintaining optical fiber vibration as claimed in claim 1, wherein: The circuit board is provided with a speed adjusting button for adjusting the rotating speed of the electric motor.

3. The test apparatus for simulating polarization maintaining optical fiber vibration as claimed in claim 1, wherein: The large gears are arranged above the small gears.

4. The test apparatus for simulating polarization maintaining optical fiber vibration as claimed in claim 1, wherein: The shafts of the power input gear set, the first speed reduction gear set, the second speed reduction gear set, the third speed reduction gear set, the fourth speed reduction gear set and the power output gear set are vertically arranged on the base and on the same horizontal line.

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