Optical fiber non-plugging tracking and light leakage detection device and detection method

Abstract

A non-pluggable optical fiber tracking and light leakage detection device and method relate to the field of optical fiber detection equipment. The device comprises a far-infrared signal loading module, a far-infrared signal receiving module, and an optical fiber bending slot. Each of the far-infrared signal loading module and the far-infrared signal receiving module is provided with an optical fiber bending slot at one end, which slightly bends the optical fiber to extract the internal optical signal. Without plugging or unplugging the optical fiber, the far-infrared signal loading module is controlled to output a predetermined infrared signal and load it into the optical fiber under test. The far-infrared signal receiving module senses the test optical signal, thereby achieving optical fiber tracking and light leakage detection. The present invention utilizes a simple and reliable method to achieve lossless and non-pluggable optical fiber path and light leakage detection, and is highly effective for tracking and operating status analysis of optical fiber equipment.

Description

Technical Field

[0001] The present invention belongs to the technical field of optoelectronic equipment detection, and relates to an optical fiber detection device, and in particular to an optical fiber tracing and light leakage detection device and a detection method. Background Art

[0002] Fiber optic system failures and hidden dangers are hidden and difficult to predict in advance. Due to the low mechanical strength of optical fiber, the entire optical fiber and its connectors are made of non-metallic plastic, which can easily cause damage during the construction, installation, and maintenance stages. In the early stages of optical fiber damage, communication loss is often not large, making it difficult to detect in time. As the operating time increases, the loss is likely to increase, eventually leading to a significant increase in the transmission bit error rate and affecting communication. However, the optical power of the optical fiber loop cannot be measured with a multimeter or clamp meter like an electrical loop. Once an optical fiber loop anomaly occurs, troubleshooting is very time-consuming and labor-intensive. There is an urgent need for fault detection technology for optical fiber loop anomalies.

[0003] There are many existing technologies for fiber optic detection instruments, but a common shortcoming is that they cannot achieve non-plugging detection. When it is necessary to find and detect a fiber optic line, it is necessary to unplug the fiber at least at one end of the communication port on both ends to detect the fiber path or attenuation using a red light pen, breakpoint tester, or other equipment. Unplugging the fiber will affect normal communication, which is often not allowed. There are also technologies that propose optical power or path detection equipment based on fiber bending methods, but this will cause irreversible damage to the fiber, which is not a scientific and reasonable method and can only be used under conditions of last resort. Therefore, it is very necessary to develop an instrument that can accurately and non-destructively detect fiber path tracing and whether there is light leakage without plugging and unplugging, in order to improve the operational reliability of fiber optic equipment.

[0004] CN209264250U discloses an optical fiber light leakage detection device, which includes a laser, a support frame and an optical fiber receiving tray. The support frame and the optical fiber receiving tray are arranged on the same side of the laser, and the support frame is arranged above the optical fiber receiving tray; the laser is used to connect the optical fiber to be detected and emit a laser signal of a preset wavelength; the optical fiber receiving tray is used to receive the optical fiber to be detected; the support frame is used to support an image acquisition device, and the image acquisition device is used to acquire an image of the optical fiber to be detected to determine the light leakage point. Summary of the Invention

[0005] To address the shortcomings of the existing technology, the present invention provides a novel optical fiber detection device that can accurately and non-destructively detect optical fiber path tracking and light leakage without plugging or unplugging, thereby improving the operational reliability of optical fiber equipment. This invention overcomes the shortcomings of the existing technology.

[0006] In order to achieve the above-mentioned object of the invention, the present invention specifically adopts the following technical solutions.

[0007] A first aspect of the present invention provides an optical fiber non-pluggable tracking and light leakage detection device, comprising a far infrared signal loading module 5 , a far infrared signal receiving module 6 , a loading end optical fiber bending groove 1 and a receiving end optical fiber bending groove 12 .

[0008] One end of the far-infrared signal loading module 5 is provided with a loading end optical fiber bending groove 1, and one end of the far-infrared signal receiving module 6 is provided with a receiving end optical fiber bending groove 12. The optical fiber bending groove is used to slightly bend the optical fiber to extract the internal optical signal. Without plugging or unplugging the optical fiber, the far-infrared signal loading module 5 is controlled to output a predetermined infrared signal and load it into the optical fiber under test. The far-infrared signal receiving module 6 senses the test optical signal to realize optical fiber tracing and light leakage detection.

[0009] The infrared signal loading module 5 is provided with an infrared laser 2, an intermittent power supply 3 and a frequency modulation signal transmitting circuit 4. The infrared laser 2 is arranged in the middle position outside the arc of the optical fiber bending groove 1 at the loading end. The power output end of the intermittent power supply 3 is connected to the infrared laser 2 and the power input end of the frequency modulation signal transmitting circuit 4 respectively. The frequency modulation signal transmitting circuit 4 controls the intermittent power supply 3 to generate intermittent voltage, driving the infrared laser 2 to intermittently emit a test light signal.

[0010] Further preferably, the wavelength of the infrared laser 2 is 3000 nanometers.

[0011] The far-infrared signal receiving module 6 includes a light receiver 7 , a photocurrent meter 8 , a frequency modulation signal receiving circuit 9 , an on-off control circuit 10 and a weak-light infrared photovoltaic cell 11 .

[0012] The weak-light infrared photovoltaic cell 11 is arranged in the middle position outside the arc of the receiving end optical fiber bending groove 12, and its photocurrent output end is connected to the photocurrent meter 8 through the optical receiver 7. The signal output end of the frequency modulation signal receiving circuit 9 is connected to the signal input end of the on-off control circuit 10. The on-off control circuit 10 is connected in series with the weak-light infrared photovoltaic cell 11 and the photocurrent meter 8. The frequency modulation signal receiving circuit 9 receives the synchronous intermittent signal emitted by the frequency modulation signal transmitting circuit 4 to control the on-off control circuit 10.

[0013] When the far-infrared signal receiving module 6 receives the test light signal, the light signal inside the optical fiber is taken out through the optical fiber bending groove 12 at the receiving end. After the infrared weak-light photovoltaic cell 11 receives the light signal, it converts the light signal into an electrical signal through the photoelectric effect, generating a photocurrent. The photocurrent is transmitted in the loop and displayed by the photocurrent meter 8.

[0014] When the tested optical fiber is in good condition, the test optical signal output by the infrared signal loading module 5 will not be received by the far-infrared signal receiving module 6;

[0015] When a light leakage defect exists in the tested optical fiber, the test optical signal output by the infrared signal loading module 5 can be received by the receiving end optical fiber bending groove 12 of the far-infrared signal receiving module 6 .

[0016] A second aspect of the present invention provides a detection method based on the above-mentioned optical fiber non-plugging tracking and light leakage detection device, comprising the following steps:

[0017] Step 1: When testing an optical fiber, place the far-infrared signal loading module and the far-infrared signal receiving module on the optical fiber to be tested, and clamp the optical fiber into the optical fiber bending grooves of the far-infrared signal loading module and the far-infrared signal receiving module;

[0018] Step 2: The frequency modulation signal transmitting circuit controls the intermittent power supply to intermittently emit voltage, driving the infrared laser to intermittently emit a test light signal and load it onto the optical fiber under test;

[0019] Step 3: When the optical fiber light leakage position is detected, the far infrared signal receiving module receives the test light signal to achieve optical fiber tracking and light leakage detection.

[0020] Further preferably, when testing an optical fiber, the optical fiber is clamped into the fiber bending grooves of the far-infrared signal loading module and the far-infrared signal receiving module. The fiber bending grooves utilize the principle of reversible optical paths, allowing the laser signal to be injected into the optical fiber through the slightly bent optical fiber for transmission. Further preferably, the FM signal transmitting circuit controls the intermittent power supply to intermittently emit voltage while simultaneously transmitting an intermittent signal to the FM signal receiving circuit. Upon receiving the intermittent signal, the FM signal receiving circuit controls the on-off control circuit to conduct, thereby forming a closed loop between the photocurrent meter and the weak-light infrared photovoltaic cell.

[0021] Further preferably, the optical signal enters the far-infrared signal receiving module through the optical fiber bending groove at the receiving end. After the infrared weak-light photovoltaic cell receives the optical signal, it converts the optical signal into an electrical signal through the photoelectric effect, generating a photocurrent. The photocurrent is transmitted in the loop and displayed by a photocurrent meter, thereby realizing optical fiber tracking and light leakage detection.

[0022] The beneficial effects of the present invention are as follows: the technical solution of the present invention uses a simple and reliable method to achieve lossless and plug-free optical fiber path and light leakage detection, which can play a very good role in the tracing and operation status analysis of optical fiber equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The principles and features of the present invention will be further described in detail below with reference to the accompanying drawings.

[0024] Figure 1 It is a structural diagram of an embodiment of the present invention. DETAILED DESCRIPTION

[0025] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. The embodiments described in this application are only part of the embodiments of the present invention, not all of them. Based on the spirit of the present invention, other embodiments obtained by ordinary technicians in this field without making creative efforts are all within the scope of protection of the present invention.

[0026] like Figure 1 As shown, this embodiment 1 provides a fiber optic tracking and light leakage detection device without plugging and unplugging, comprising a far-infrared signal loading module 5, a far-infrared signal receiving module 6, a loading-end fiber bending slot 1, a receiving-end fiber bending slot 12, an infrared laser 2, an intermittent power supply 3, a frequency-modulated signal transmitting circuit 4, a light receiver 7, a photocurrent meter 8, a frequency-modulated signal receiving circuit 9, an on-off control circuit 10, and a weak-light infrared photovoltaic cell 11. Two fiber bending slots are provided, one at each end of the infrared signal loading module 5 and the other at each end of the far-infrared signal receiving module 6. The infrared signal loading module 5 is equipped with an infrared laser 2, an intermittent power supply 3, and a frequency-modulated signal transmitting circuit 4. The infrared laser has a wavelength of 3000 nanometers.

[0027] To test an optical fiber channel without plugging or unplugging, it is necessary to bend the fiber at a certain curvature so that the refraction angle of the light beam inside the fiber exceeds the critical angle, leaking the internal light signal for detection. However, bending the optical fiber will cause irreversible damage to the fiber. For this purpose, the present invention uses a 3000-nanometer far-infrared signal. Due to the long wavelength of far-infrared, the corresponding refraction angle is large and the critical angle is small. Therefore, a bending curvature of generally 10-20 times the radius can leak the light signal. In this way, the internal light signal can be extracted by slightly bending the optical fiber, realizing the purpose of lossless and non-plugging detection of the internal light signal.

[0028] In a further preferred but non-limiting embodiment of the present invention, the power output end of the intermittent power supply 3 is connected to the power input end of the infrared laser 2 and the frequency modulation signal transmitting circuit 4 respectively, and the frequency modulation signal transmitting circuit 4 controls the intermittent power supply 3 to generate intermittent voltage, driving the infrared laser 2 to intermittently emit a test light signal.

[0029] In a further preferred but non-limiting embodiment of the present invention, an infrared laser 2, an intermittent power supply 3 and a frequency-modulated signal transmitting circuit 4 are provided in the infrared signal loading module 5. The wavelength of the infrared laser 2 is 3000 nanometers. The infrared laser 2 is arranged in the middle position outside the arc of the loading end optical fiber bending groove 1. Since the optical path is reversible, the laser signal can be injected into the optical fiber through the slightly bent optical fiber for transmission. Since the signal frequency is low, it will not affect the normal optical communication of 800-1600 nanometers. This far-infrared signal is generated with the intermittent power supply and loaded on the optical fiber. When testing the optical fiber, the far-infrared signal loading module 5 is placed on the optical fiber to be tested, and the optical fiber is clamped into the loading end optical fiber bending groove 1, and the infrared signal can be loaded into this optical fiber.

[0030] In a further preferred but non-restrictive embodiment of the present invention, a far-infrared signal receiving module 6 is used to clamp the optical fiber to be tested into the receiving end optical fiber bending groove 12. When the far-infrared signal receiving module 6 receives the test optical signal, the optical signal inside the optical fiber is taken out through the receiving end optical fiber bending groove 12. After the infrared weak-light photovoltaic cell 11 receives 3000 nanometers of intermittent infrared light, it converts the optical signal into an electrical signal through the photoelectric effect, generating a photocurrent. The photocurrent is transmitted in the loop and displayed by the photocurrent meter 8, thereby realizing optical fiber tracking.

[0031] In a further preferred but non-restrictive embodiment of the present invention, the frequency modulation signal receiving circuit 9 and the on-off control circuit 10 can collect the synchronous intermittent signal of the far-infrared signal loading module. The on-off control circuit 10 is connected in series with the weak-light infrared photovoltaic cell 11 and the photocurrent meter 8, so that light leakage detection of the optical fiber bundle can be realized. The weak-light red light photovoltaic cell can detect whether there is 3000-nanometer infrared light synchronized with the intermittent signal in a large range, thereby realizing the detection of whether there is light leakage and the position of the optical fiber leakage point.

[0032] This embodiment also provides a detection method for an optical fiber non-plugging tracking and light leakage detection device, comprising the following steps:

[0033] Step 1: When testing an optical fiber, place the far-infrared signal loading module and the far-infrared signal receiving module on the optical fiber to be tested, and clamp the optical fiber into the optical fiber bending grooves of the far-infrared signal loading module and the far-infrared signal receiving module;

[0034] Step 2: The frequency modulation signal transmitting circuit controls the intermittent power supply to intermittently emit voltage, driving the infrared laser to intermittently emit a test light signal and load it onto the optical fiber under test;

[0035] Step 3: When the optical fiber leakage position is detected, the far-infrared signal receiving module receives the test optical signal. The optical signal enters the far-infrared signal receiving module through the optical fiber bending groove at the receiving end. After the infrared weak-light photovoltaic cell receives the optical signal, it converts the optical signal into an electrical signal through the photoelectric effect, generating a photocurrent. The photocurrent is transmitted in the loop and displayed by the photocurrent meter, thereby realizing optical fiber tracking and light leakage detection.

[0036] In a further preferred but non-limiting embodiment of the present invention, the FM signal transmitting circuit controls the intermittent power supply to intermittently emit voltage, while the FM signal transmitting circuit sends an intermittent signal to the FM signal receiving circuit. After receiving the intermittent signal, the FM signal receiving circuit controls the on-off control circuit to turn on, forming a closed loop between the photoammeter and the weak-light infrared photovoltaic cell.

[0037] The beneficial effects of the present invention are as follows: the technical solution of the present invention uses a simple and reliable method to achieve lossless and plug-free optical fiber path and light leakage detection, which can play a very good role in the tracing and operation status analysis of optical fiber equipment.

[0038] It should be noted that the above embodiments are intended to illustrate the present invention rather than to limit the present invention. Many technical features in different embodiments of the present invention can be interchanged or omitted, and the settings of many components can be changed as needed. The "one" or "a" before the element of the present invention does not exclude the presence of multiple such elements. These changes should all fall within the scope of protection of the present invention.

Claims

1. An optical fiber tracking and light leakage detection device without plugging and unplugging, comprising a far-infrared signal loading module (5), a far-infrared signal receiving module (6), a loading-end optical fiber bending groove (1), and a receiving-end optical fiber bending groove (12), characterized in that: The far-infrared signal loading module (5) outputs a far-infrared test light signal with a wavelength of 3000 nanometers; One end of the far-infrared signal loading module (5) is provided with a loading end optical fiber bending groove (1), and one end of the far-infrared signal receiving module (6) is provided with a receiving end optical fiber bending groove (12), wherein: An infrared laser (2), an intermittent power supply (3), and a frequency modulation signal transmitting circuit (4) are provided in the infrared signal loading module (5); the infrared laser (2) is provided at a middle position outside the circular arc of the optical fiber bending groove; the power output end of the intermittent power supply (3) is connected to the infrared laser (2) and the power input end of the frequency modulation signal transmitting circuit (4), respectively; the frequency modulation signal transmitting circuit (4) controls the intermittent power supply (3) to generate an intermittent voltage, and drives the infrared laser (2) to intermittently emit a test light signal; The far-infrared signal receiving module (6) is internally provided with a light receiver (7), a photocurrent meter (8), a frequency modulation signal receiving circuit (9), an on-off control circuit (10) and a weak-light infrared photovoltaic cell (11); The weak-light infrared photovoltaic cell (11) is arranged at the middle position outside the circular arc of the receiving end optical fiber bending groove (12), and its photocurrent output end is connected to the photocurrent meter (8) through the optical receiver (7). The signal output end of the frequency modulation signal receiving circuit (9) is connected to the signal input end of the on-off control circuit (10). The on-off control circuit (10) is connected in series with the weak-light infrared photovoltaic cell (11) and the photocurrent meter (8). The frequency modulation signal receiving circuit (9) receives the synchronous intermittent signal emitted by the frequency modulation signal transmitting circuit (4) to control the on-off control circuit (10). Without plugging or unplugging the optical fiber, clamp the two sides of the optical fiber to be tested into the loading end optical fiber bending groove (1) and the receiving end optical fiber bending groove (12) respectively; The far-infrared signal loading module (5) is controlled to output a predetermined infrared signal and load the infrared signal into the optical fiber to be tested through the loading end optical fiber bending groove (1); the far-infrared signal receiving module (6) senses the test optical signal through the receiving end optical fiber bending groove (12), thereby realizing optical fiber tracing and light leakage detection.

2. The optical fiber tracking and light leakage detection device according to claim 1, characterized in that: When the far-infrared signal receiving module (6) receives the test optical signal, the optical signal inside the optical fiber is taken out through the optical fiber bending groove (12) at the receiving end. After the infrared weak-light photovoltaic cell (11) receives the optical signal, it converts the optical signal into an electrical signal through the photoelectric effect, generating a photocurrent, which is transmitted in the loop and displayed by the photocurrent meter (8).

3. The optical fiber tracking and light leakage detection device according to claim 1, characterized in that: When the optical fiber under test is in good condition, the test optical signal output by the infrared signal loading module (5) will not be received by the far-infrared signal receiving module (6); When a light leakage defect exists in the optical fiber being tested, the test optical signal output by the infrared signal loading module (5) can be received by the receiving end optical fiber bending groove (12) of the far infrared signal receiving module (6).

4. A detection method using the optical fiber non-plugging tracking and light leakage detection device according to any one of claims 1 to 3, characterized in that: The steps include: Step 1: When testing an optical fiber, place the far-infrared signal loading module and the far-infrared signal receiving module on the optical fiber to be tested, and clamp the optical fiber into the optical fiber bending grooves of the far-infrared signal loading module and the far-infrared signal receiving module; Step 2: The frequency modulation signal transmitting circuit controls the intermittent power supply to intermittently emit voltage, driving the infrared laser to intermittently emit a test light signal and load it onto the optical fiber under test; Step 3: When the optical fiber light leakage position is detected, the far infrared signal receiving module receives the test light signal to achieve optical fiber tracking and light leakage detection.

5. The detection method of the optical fiber non-plugging tracking and light leakage detection device according to claim 4, characterized in that: In step 1, when testing the optical fiber, the optical fiber is clamped into the optical fiber bending groove of the far-infrared signal loading module and the far-infrared signal receiving module. The optical fiber bending groove utilizes the principle of reversible optical path to allow the laser signal to be injected into the optical fiber through the slightly bent optical fiber for transmission.

6. The detection method of the optical fiber non-plugging tracking and light leakage detection device according to claim 4, characterized in that: In step 2, the FM signal transmitting circuit controls the intermittent power supply to intermittently emit voltage, while the FM signal transmitting circuit sends an intermittent signal to the FM signal receiving circuit. After receiving the intermittent signal, the FM signal receiving circuit controls the on-off control circuit to turn on, forming a closed loop between the photoammeter and the weak-light infrared photovoltaic cell.

7. The detection method of the optical fiber non-plugging tracking and light leakage detection device according to claim 4, characterized in that: In step 3, when the optical fiber leakage position is detected, the far-infrared signal receiving module receives the test optical signal. The optical signal enters the far-infrared signal receiving module through the optical fiber bending groove at the receiving end. After the infrared weak-light photovoltaic cell receives the optical signal, it converts the optical signal into an electrical signal through the photoelectric effect, generating a photocurrent. The photocurrent is transmitted in the loop and displayed by the photocurrent meter, thereby realizing optical fiber tracking and light leakage detection.

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