Railway perimeter optical cable vibration monitoring system capable of reducing interference noise

Abstract

The utility model discloses a railway perimeter optical cable vibration monitoring system capable of reducing interference noise, which belongs to the technical field of vibration monitoring, and comprises an optical cable laying assembly, a vibration acquisition unit, a vibration filtering unit and an alarm and recording unit, the optical cable laying assembly comprises a fence laying unit, an enclosing wall laying unit and a ground laying unit; according to the optical cable vibration monitoring system, through a reasonable optical cable arrangement mode and a vibration filtering technology, the optical cable vibration monitoring system is enabled to have relatively strong anti-interference capability, environmental interference noise is effectively removed, and the false alarm rate of the system is significantly reduced.

Description

Technical Field

[0001] This utility model relates to the field of vibration monitoring technology, and in particular to a vibration monitoring system for railway perimeter optical cables that reduces interference noise. Background Technology

[0002] A railway perimeter optical cable vibration monitoring system based on fiber optic sensing technology reflects the vibration interference experienced by the optical cable by monitoring the phase changes of the laser signal in the cable, thereby determining whether there is intrusion or other abnormalities at the railway perimeter. In practical applications, environmental noise (such as wind noise, rain noise, track vibration, and vibration from surrounding vehicles) can interfere with the optical cable vibration signal, leading to an increased false alarm rate and decreased monitoring accuracy. Therefore, effectively reducing noise interference, decreasing the false alarm rate, and improving alarm accuracy have become urgent technical problems to be solved in railway perimeter optical cable vibration monitoring systems. Utility Model Content

[0003] This invention provides a railway perimeter optical cable vibration monitoring system to reduce interference noise, thereby solving the problem of environmental noise interfering with the accuracy of optical cable vibration monitoring.

[0004] A vibration monitoring system for railway perimeter optical cables to reduce interference noise includes:

[0005] Optical cable deployment components include fence deployment units, wall deployment units, and ground deployment units;

[0006] Vibration acquisition unit, used to collect vibration data from optical cables;

[0007] Vibration filtering unit, used to filter high-frequency interference noise; and

[0008] The alarm and recording unit triggers an alarm and records event information after identifying a valid vibration event.

[0009] The fence deployment unit includes a fence base, multiple fence railings and fixing clips. The optical cable is fixed to the fence railings by the fixing clips, and the portion of the optical cable located between two adjacent fence railings hangs down naturally.

[0010] The fence deployment unit includes a fence base, a fence panel, and multiple fixing clips. Multiple fences are installed on the fence panel, and the optical cable is installed on the fence through the fixing clips. The portion of the optical cable located between two fences hangs down naturally.

[0011] The ground deployment unit includes, from bottom to top, the original soil layer, the sandy soil layer, the backfill soil layer, and the surface layer, with the optical cable located in the sandy soil layer.

[0012] Preferably, the vibration acquisition unit is an optical cable vibration sensor.

[0013] Preferably, the vibration filtering unit is a low-pass filter.

[0014] Compared with the prior art, the beneficial effects of this utility model are: through reasonable optical cable laying method and vibration filtering technology, this utility model enables the optical cable vibration monitoring system to have strong anti-interference ability, effectively remove environmental interference noise, and significantly reduce the false alarm rate of the system. Attached Figure Description

[0015] Figure 1 This is a structural diagram of a fence deployment unit;

[0016] Figure 2 A structural diagram of the units for the perimeter wall layout;

[0017] Figure 3 A structural diagram of the ground-based deployment unit;

[0018] Figure 4 This is a structural block diagram of an optical cable vibration monitoring system.

[0019] Explanation of reference numerals in the attached figures:

[0020] 1-Fence base, 2-Fence railing, 3-Fixing clip, 4-Optical cable, 5-Wall base, 6-Wall panel, 7-Original soil layer, 8-Sand layer, 9-Backfill soil layer, 10-Surface layer, 11-Vibration acquisition unit, 12-Vibration filtering unit, 13-Alarm and recording unit. Detailed Implementation

[0021] The following describes a specific embodiment of the present invention in detail with reference to the accompanying drawings. However, it should be understood that the scope of protection of the present invention is not limited to the specific embodiment.

[0022] like Figures 1 to 4 As shown in the figure, the railway perimeter optical cable vibration monitoring system for reducing interference noise provided by this utility model includes an optical cable laying component, a vibration acquisition unit 11, a vibration filtering unit 12, and an alarm and recording unit 13. The optical cable laying component includes a fence laying unit, a wall laying unit, and a ground laying unit.

[0023] Specifically, the fence deployment unit includes a fence base 1, multiple fence railings 2 and fixing clips 3. The optical cable is fixed to the fence railings 2 by the fixing clips 3, and the optical cable 4 located between two adjacent fence railings 2 hangs down naturally.

[0024] The fence deployment unit includes a fence base 5, a fence panel 6, and multiple fixing clips 3. Multiple fences are installed on the fence panel, and the optical cable is installed on the fence through the fixing clips 3. The optical cable 4 located between two fences hangs down naturally.

[0025] The ground deployment unit includes, from bottom to top, the original soil layer 7, the sand layer 8, the backfill soil layer 9, and the surface layer 10, with the optical cable located in the sand layer 8.

[0026] The above-mentioned deployment method can reduce the probability of wind, rain, track vibration, and vibration of surrounding vehicles triggering the alarm and recording unit 13, thereby improving accuracy.

[0027] In this embodiment, the vibration acquisition unit 11, an optical cable vibration sensor, is used to acquire the vibration of the optical cable and transmit the signal to the vibration filtering unit 12. During this process, the signal is converted into an electronic signal by the photoelectric signal conversion unit.

[0028] The vibration filtering unit 12 performs primary filtering on the collected vibration signal, using a low-pass filter to remove high-frequency interference noise (such as wind noise, rain noise, etc.) and retain the low-frequency vibration signal.

[0029] The primary filter in this embodiment is an adjustable filter with a pass frequency of 1-20000Hz.

[0030] After filtering, the vibration signal can be further decomposed. Specifically, the filtered vibration signal is decomposed into component signals of multiple frequency bands through wavelet transform in order to separate the effective signal and the interference noise signal.

[0031] In some other embodiments, the decomposed signal is compared and identified by a preset interference noise feature library, an adaptive filtering algorithm is used to remove interference noise components, retain the effective vibration signal, and then the effective vibration signal is reconstructed to improve the signal-to-noise ratio.

[0032] Alternatively, machine learning algorithms (such as convolutional neural networks CNN) can be used to classify and identify the reconstructed signal to determine whether it is a valid vibration event (train passing by or colliding with, climbing or other intrusive behavior) or environmental interference noise (wind and rain or nearby construction).

[0033] The alarm and recording unit 13 triggers an alarm and records event information after identifying a valid vibration event. If it is interference noise, it ignores it and continues monitoring.

[0034] In addition, alarm methods include, but are not limited to, SMS, relay, and email alerts.

[0035] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit and essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0036] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A vibration monitoring system for railway perimeter optical cables to reduce interference noise, characterized in that, include: Optical cable deployment components include fence deployment units, wall deployment units, and ground deployment units; Vibration acquisition unit, used to collect vibration data from optical cables; Vibration filtering unit, used to filter high-frequency interference noise; and The alarm and recording unit triggers an alarm and records event information after identifying a valid vibration event.

2. The railway perimeter optical cable vibration monitoring system for reducing interference noise as described in claim 1, characterized in that, The fence deployment unit includes a fence base, multiple fence railings and fixing clips. The optical cable is fixed to the fence railings by the fixing clips, and the portion of the optical cable located between two adjacent fence railings hangs down naturally.

3. The railway perimeter optical cable vibration monitoring system for reducing interference noise as described in claim 1, characterized in that, The fence deployment unit includes a fence base, a fence panel, and multiple fixing clips. Multiple fences are installed on the fence panel, and the optical cable is installed on the fence through the fixing clips. The portion of the optical cable located between two fences hangs down naturally.

4. The railway perimeter optical cable vibration monitoring system for reducing interference noise as described in claim 1, characterized in that, The ground deployment unit includes, from bottom to top, the original soil layer, the sandy soil layer, the backfill soil layer, and the surface layer, with the optical cable located in the sandy soil layer.

5. The railway perimeter optical cable vibration monitoring system for reducing interference noise as described in claim 1, characterized in that, The vibration acquisition unit is an optical cable vibration sensor.

6. The railway perimeter optical cable vibration monitoring system for reducing interference noise as described in claim 1, characterized in that, The vibration filtering unit is a low-pass filter.

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