Optical fiber detection structure

Abstract

The utility model relates to the technical field of optical fiber detection, in particular to an optical fiber detection structure, which comprises an optical fiber amplifier, a light projecting optical fiber and a light receiving optical fiber which are connected onto the optical fiber amplifier, and a columnar probe, one end of the probe is provided with a first mounting hole and a second mounting hole along the length direction of the probe; a light outlet hole and a light inlet hole are formed in the side face of the probe in the length direction of the probe at intervals, the light outlet hole is communicated with the first installation hole, the light inlet hole is communicated with the second installation hole, and the end, away from the amplifier, of the light projection optical fiber is arranged at the joint of the first installation hole and the light outlet hole. One end, far away from the amplifier, of the light receiving optical fiber is arranged at the joint of the second mounting hole and the light inlet hole, so that the problem that an optical fiber detection device is inconvenient to go deep into a metal plate of a workpiece for detection in the prior art is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to optical fiber detection technical field, concretely relates to an optical fiber detection structure. BACKGROUND

[0002] In the industrial production process, welding as a commonly used processing method is widely used in various fields, such as automobile, equipment manufacturing etc., a variety of components are combined together to form a complete workpiece by welding, many workpieces are usually composed of multilayer sheet metal parts, form a cavity in the interior to reduce the weight of the entire workpiece, when welding these workpieces, the standard parts such as nuts and screws need to be welded in the interior composed of multilayer sheet metal parts, so as to facilitate the assembly of products, through these standard parts to connect with other workpieces

[0003] However, at present, the nut screw and other standard parts are often missing during welding, in order to avoid these defective workpieces flowing into the next process, affecting the subsequent assembly work, the workpiece after processing is generally detected to determine whether it is qualified.

[0004] When detecting the standard parts such as nuts and screws, the proximity switch is usually used to directly detect the presence or absence of standard parts, but if the welded standard part is surrounded by multilayer sheet metal parts, the ordinary proximity switch cannot be detected, and the light emitting and receiving distance of optical fiber detection is too close to be easily disturbed, which is difficult to accurately detect.

[0005] Based on the above reasons, the utility model improves the existing optical fiber detection equipment, which is convenient for detecting the sheet metal inside the workpiece and judging the presence or absence of the internal standard parts. CONTENT OF THE UTILITY MODEL

[0006] The utility model aims at providing an optical fiber detection structure, solving the problem that the optical fiber detection device is not convenient for detecting the sheet metal inside the workpiece in the prior art.

[0007] To solve the above technical problems, the utility model adopts the following technical scheme:

[0008] An optical fiber detection structure, comprising a fiber amplifier, a light emitting fiber and a light receiving fiber connected to the fiber amplifier, and a probe in a columnar shape, a first mounting hole and a second mounting hole are arranged at one end of the probe along the length direction of the probe, a light emitting hole and a light receiving hole are arranged at the side surface of the probe along the length direction of the probe, the light emitting hole is in communication with the first mounting hole, the light receiving hole is in communication with the second mounting hole, the end of the light emitting fiber away from the amplifier is arranged at the connection position of the first mounting hole and the light emitting hole, and the end of the light receiving fiber away from the amplifier is arranged at the connection position of the second mounting hole and the light receiving hole.

[0009] Further technical solutions are, still including a limiting ring, the outer wall of the probe is provided with an internal thread along its length direction, the inner wall of the limiting ring is provided with an external thread matched with the internal thread, and the limiting ring is threadedly matched and installed on the outer wall of the probe.

[0010] Further technical solutions are, the end of the probe away from the first mounting hole is conical, and the tip of the cone is spherical.

[0011] Further technical solutions are, the probe is provided with a locking cavity communicated with the first mounting hole and the second mounting hole, the locking cavity is movably provided with a pressing block abutting against the surface of the light-emitting optical fiber and the light-receiving optical fiber, the side wall of the probe is provided with a locking screw hole communicated with the locking cavity, a locking screw is threadedly connected in the locking screw hole, and one end of the locking screw in the locking cavity abuts against one side of the pressing block away from the light-emitting optical fiber and the light-receiving optical fiber.

[0012] Further technical solutions are, one end of the locking screw outside the probe is connected with a knob plate, the pressing block abuts against the light-receiving optical fiber through a first arc surface, and the locking block abuts against the light-emitting optical fiber through a second arc surface; the first arc surface and the second arc surface are both provided with rubber sheets.

[0013] Further technical solutions are, the hole bottom of the first mounting hole and the hole bottom of the second mounting hole are both provided with a flexible layer.

[0014] Compared with the prior art, the utility model has the advantages that: 1. When detecting, the probe can be inserted into the cavity inside the sheet metal part through a small hole in the sheet metal part, and since the light-emitting hole and the light-receiving hole are on the side of the probe, compared with the traditional probe at the end, the probe can detect without turning inside the sheet metal part, improving the convenience of detection; 2. Through cooperation of the first mounting hole, the second mounting hole, the light-receiving hole and the light-emitting hole, the end of the light-emitting optical fiber and the light-receiving optical fiber can be completely isolated, so that interference during close-range detection can be avoided. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a side cross-sectional view of the optical fiber detection structure of the utility model.

[0016] Figure 2 It is a cross-sectional view of the optical fiber detection structure of the utility model. Figure 1 .

[0017] Figure 3 It is a cross-sectional view of the optical fiber detection structure of the utility model. Figure 2 .

[0018] Icons: 1-Receiving fiber, 2-Sending fiber, 3-Probe, 4-First mounting hole, 5-Second mounting hole, 6-Emitting hole, 7-Inlet hole, 8-Limiting ring, 9-Conical shape, 10-Spherical surface, 11-Locking cavity, 12-Pressure block, 13-Locking screw hole, 14-Locking screw, 15-Knob plate, 16-First arc surface, 17-Second arc surface, 18-Sheet metal part, 19-Standard part. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0020] Figures 1 to 3 The following is an embodiment of the present invention.

[0021] Example:

[0022] like Figure 1 As shown, an optical fiber detection structure includes an optical fiber amplifier, a light-emitting optical fiber 2 and a light-receiving optical fiber 1 connected to the optical fiber amplifier, and a columnar probe 3. One end of the probe 3 has a first mounting hole 4 and a second mounting hole 5 along its length. The side of the probe 3 has a light-emitting hole 6 and a light-receiving hole 7 spaced apart along its length. The light-emitting hole 6 communicates with the first mounting hole 4, and the light-receiving hole 7 communicates with the second mounting hole 5. The end of the light-emitting optical fiber 2 furthest from the amplifier is placed at the junction of the first mounting hole 4 and the light-emitting hole 6, and the end of the light-receiving optical fiber 1 furthest from the amplifier is placed at the junction of the second mounting hole 5 and the light-receiving hole 7. During detection, the probe 3 can be inserted into the cavity inside the sheet metal part 18 through a small hole. Because the light-emitting hole 6 and the light-receiving hole 7 are on the side of the probe 3, compared to a traditional probe 3 located at the end, detection can be performed without turning inside the sheet metal part 18, improving the convenience of detection. By using the first mounting hole 4, the second mounting hole 5, the light inlet hole 7, and the light outlet hole 6 together, the ends of the light-emitting fiber 2 and the light-receiving fiber 1 can be completely isolated, thus avoiding interference during close-range detection.

[0023] It also includes a limiting ring 8. The outer wall of the probe 3 has an internal thread along its length, and the inner wall of the limiting ring 8 has an external thread that matches the internal thread. The limiting ring 8 is threadedly fitted onto the outer wall of the probe 3. By setting the limiting ring 8, after the probe 3 is inserted into the small hole on the sheet metal part 18, the insertion length of the probe 3 is controlled by the limiting ring 8, avoiding the probe 3 failing to detect the standard part 19 due to an improper insertion length. The height of the limiting ring 8 can be adjusted by the cooperation of the internal and external threads, thereby controlling the insertion depth.

[0024] The end of the probe 3 away from the first mounting hole 4 is provided with a conical shape 9, and the tip of the conical shape 9 is provided with a spherical surface 10. By providing the conical shape 9, the probe 3 can more easily enter the small hole on the sheet metal part 18, and play a guiding role. By providing the spherical surface 10, the sharp part can avoid causing damage to the workpiece or the operator.

[0025] As shown in Figure 2 and Figure 3 , the probe 3 is provided with a locking cavity 11 which is in communication with the first mounting hole 4 and the second mounting hole 5, and the locking cavity 11 is movably provided with a pressing block 12 which is in contact with the surface of the light projecting fiber 2 and the light receiving fiber 1, and the side wall of the probe 3 is provided with a locking screw hole 13 which is in communication with the locking cavity 11, and the locking screw hole 13 is threadedly connected with a locking screw 14, and the locking screw 14 is in contact with the side of the pressing block 12 away from the light projecting fiber 2 and the light receiving fiber 1 at one end of the locking cavity 11. During use of the probe 3, in order to avoid the light projecting fiber 2 and the light receiving fiber 1 from sliding out of the first mounting hole 4 and the second mounting hole 5, the pressing block 12 is pushed by the locking screw 14 to press the light projecting fiber 2 and the light receiving fiber 1 against the hole wall of the first mounting hole 4 and the second mounting hole 5, so that the light projecting fiber 2 and the light receiving fiber 1 can be prevented from sliding in the first mounting hole 4 and the second mounting hole 5, thereby allowing the ends of the light projecting fiber 2 and the light receiving fiber 1 to be aligned with the light emitting hole 6 and the light entering hole 7 respectively. Among them Figure 2 is a schematic view of the pressing block 12 not pressing the light projecting fiber 2 and the light receiving fiber 1, Figure 3 is a schematic view of the pressing block 12 pressing the light projecting fiber 2 and the light receiving fiber 1.

[0026] The end of the locking screw 14 outside the probe 3 is connected with a knob plate 15, the locking block is in contact with the light receiving fiber 1 through a first arc surface 16, and the pressing block 12 is in contact with the light projecting fiber 2 through a second arc surface 17; the first arc surface 16 and the second arc surface 17 are both provided with rubber sheets. By providing the knob plate 15, the locking screw 14 can be easily rotated to fix the light projecting fiber 2 and the light receiving fiber 1. When it is necessary to adjust and replace the light projecting fiber 2 and the light receiving fiber 1, the pressing block 12 can be loosened from the light projecting fiber 2 and the light receiving fiber 1 through the knob plate 15, so that the light projecting fiber 2 and the light receiving fiber 1 can be pulled out of the first mounting hole 4 and the second mounting hole 5.

[0027] The hole bottom of the first mounting hole 4 and the hole bottom of the second mounting hole 5 are both provided with a flexible layer. By providing the flexible layer, the end of the light projecting fiber 2 and the light receiving fiber 1 can be prevented from being in contact with the hole bottom of the first mounting hole 4 and the second mounting hole 5 to cause abrasion.

[0028] While the present application has been described with reference to the numerous explanatory embodiments thereof, it is to be understood that various other modifications can be effected within the scope of the application, as described in the claims. More specifically, many variations and modifications will be apparent to those skilled in the art from the description and drawings herein, given the benefit of the description, drawings and claims as a whole. Other uses will be apparent to those skilled in the art.

Claims

1. A fiber optic detection structure, comprising a fiber optic amplifier, and a light-emitting fiber (2) and a light-receiving fiber (1) connected to the fiber optic amplifier, characterized in that, It also includes a columnar probe (3), one end of which is provided with a first mounting hole (4) and a second mounting hole (5) along the length direction of the probe (3). The side of the probe (3) is provided with a light-emitting hole (6) and a light-inlet hole (7) at intervals along the length direction of the probe (3). The light-emitting hole (6) is connected to the first mounting hole (4), and the light-inlet hole (7) is connected to the second mounting hole (5). The end of the light-emitting fiber (2) away from the amplifier is placed at the connection between the first mounting hole (4) and the light-emitting hole (6), and the end of the light-receiving fiber (1) away from the amplifier is placed at the connection between the second mounting hole (5) and the light-inlet hole (7).

2. The fiber optic detection structure according to claim 1, characterized in that: It also includes a limiting ring (8), the outer wall of the probe (3) is provided with an internal thread along its length direction, the inner wall of the limiting ring (8) is provided with an external thread that matches the internal thread, and the limiting ring (8) is threadedly fitted and installed on the outer wall of the probe (3).

3. The fiber optic detection structure according to claim 1, characterized in that: The end of the probe (3) away from the opening of the first mounting hole (4) is set as a cone (9), and the tip of the cone (9) is a spherical surface (10).

4. The fiber optic detection structure according to claim 1, characterized in that: The probe (3) is provided with a locking cavity (11) that communicates with the first mounting hole (4) and the second mounting hole (5). A pressing block (12) that is in contact with the surface of the light-emitting fiber (2) and the light-receiving fiber (1) is movably disposed in the locking cavity (11). A locking screw hole (13) that communicates with the locking cavity (11) is provided on the side wall of the probe (3). A locking screw (14) is threadedly connected in the locking screw hole (13). One end of the locking screw (14) is placed in the locking cavity (11) and contacts the side of the pressing block (12) away from the light-emitting fiber (2) and the light-receiving fiber (1).

5. The fiber optic detection structure according to claim 4, characterized in that: The locking screw (14) is connected to a knob plate (15) at one end outside the probe (3). The clamping block is attached to the light-receiving optical fiber (1) through the first arc surface (16), and the clamping block (12) is attached to the light-emitting optical fiber (2) through the second arc surface (17). Rubber sheets are provided on both the first arc surface (16) and the second arc surface (17).

6. The fiber optic detection structure according to claim 1, characterized in that: The bottom of the first mounting hole (4) and the bottom of the second mounting hole (5) are both provided with a flexible layer.

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