Distributed optical fiber vibration detection alarm system
The distributed fiber optic vibration detection alarm system solves the problem of high false alarm rate in traditional perimeter alarm products, achieving highly accurate and reliable perimeter intrusion monitoring.
Patent Information
- Application Number
- CN202423081756.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-13
- Publication Date
- 2026-01-27
- Estimated Expiration
- 2034-12-13
AI Technical Summary
Traditional perimeter alarm products, such as infrared beam detectors, microwave detectors, and vibration cable detectors, are prone to false alarms and cannot meet modern security requirements.
A distributed fiber optic vibration detection and alarm system is adopted. The system uses fiber optic detectors to sense external vibrations, signal processors to process the signals and transmit them to the perimeter alarm host. The industrial control computer judges the abnormality and controls the alarm. The system is linked with video surveillance and auxiliary lighting systems to reduce false alarms.
It enables large-scale, multi-angle information monitoring, reduces false alarm rates, and improves the accuracy and reliability of monitoring.
Smart Images
Figure CN223842469U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of security technology, and in particular relates to a distributed fiber optic vibration detection and alarm system. Background Technology
[0002] With economic development and improved living standards, people have increasingly higher demands for security, and security measures are becoming more sophisticated. Important locations are increasingly requiring perimeter intrusion alarms, but traditional perimeter alarm products, such as infrared beam detectors, microwave detectors, and vibration cable detectors, are prone to false alarms and no longer meet people's security requirements. Summary of the Invention
[0003] In view of this, the present invention aims to overcome the shortcomings of the above-mentioned problems in the prior art and proposes a distributed optical fiber vibration detection and alarm system.
[0004] To achieve the above objectives, the technical solution of this utility model is implemented as follows:
[0005] A distributed fiber optic vibration detection and alarm system includes a fiber optic vibration detection device, a perimeter alarm host, an industrial control computer, and a display. The fiber optic vibration detection device includes a fiber optic detector, a photoelectric transmission module, and a signal processor.
[0006] The industrial control computer and monitor are installed in the monitoring room, while the fiber optic vibration detection device and perimeter alarm host are installed outside the monitoring room.
[0007] The fiber optic detectors are distributed near the monitoring perimeter to sense stress changes in the external environment. When an intrusion occurs and vibrations are generated, the signal is processed by a signal processor and transmitted to the perimeter alarm host via a photoelectric transmission module. The perimeter alarm host transmits the data to an industrial control computer, which determines whether the data is abnormal and controls the perimeter alarm host to generate an alarm message. At the same time, the intrusion location is displayed on the monitor in real time.
[0008] Furthermore, the signal processor includes an amplification unit, a shaping unit, a filtering unit, an analog-to-digital conversion unit, and a first processor connected in sequence. The first processor is also connected to an interface unit, and the first processor is connected to an optoelectronic transmission module through the interface unit.
[0009] Furthermore, it also includes a video surveillance system, which is connected to an industrial control computer.
[0010] Furthermore, it also includes an auxiliary lighting system, which is connected to an industrial control computer.
[0011] Furthermore, the perimeter alarm host includes a second processor, an audible and visual alarm unit, and a wireless communication unit, all of which are electrically connected to the second processor.
[0012] Furthermore, the fiber optic detector includes a fiber optic vibration sensor.
[0013] Furthermore, the industrial control computer is equipped with a third processor, a comparator, and a counter, with the processor connected to the comparator and the counter.
[0014] Furthermore, the optoelectronic transmission module includes an optical transmitter and an optical receiver.
[0015] Compared with existing technologies, the distributed fiber optic vibration detection and alarm system of this utility model has the following advantages:
[0016] This invention achieves detection of a large perimeter defense zone by distributing fiber optic detectors, enabling multi-angle and multi-directional information monitoring, while reducing false alarm rate and improving accuracy. Attached Figure Description
[0017] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:
[0018] Figure 1 This is a schematic diagram of the structure of a distributed optical fiber vibration detection and alarm system according to the present invention;
[0019] Figure 2 This is a schematic diagram of a distributed optical fiber vibration detection and alarm system according to the present invention.
[0020] Figure 3 This is a schematic diagram of the signal processor of this utility model.
[0021] Explanation of reference numerals in the attached figures
[0022] 1-Fiber optic vibration detection device; 2-Perimeter alarm host; 3-Industrial control computer; 4-Display; 5-Video monitoring system; 6-Auxiliary lighting system. Detailed Implementation
[0023] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.
[0024] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.
[0025] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0026] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.
[0027] like Figure 1-3 As shown, this utility model provides a distributed optical fiber vibration detection and alarm system, including an optical fiber vibration detection device 1, a perimeter alarm host 2, an industrial control computer 3, and a display 4. The optical fiber vibration detection device 1 includes an optical fiber detector, a photoelectric transmission module, and a signal processor.
[0028] The industrial control computer 3 and the display 4 are installed in the monitoring room, while the fiber optic vibration detection device and the perimeter alarm host are installed outside the monitoring room.
[0029] The fiber optic detectors are distributed near the monitoring perimeter to sense stress changes in the external environment. When an intrusion occurs and vibrations are generated, the signal is processed by the signal processor and transmitted to the perimeter alarm host 2 through the photoelectric transmission module. The perimeter alarm host 2 transmits the data to the industrial control computer 3. The industrial control computer 3 determines whether the data is abnormal and controls the perimeter alarm host 2 to generate alarm information. At the same time, the intrusion location is displayed in real time on the display 4.
[0030] Specifically, the signal processor includes an amplification unit, a shaping unit, a filtering unit, an analog-to-digital conversion unit, and a first processor connected in sequence. The first processor is also connected to an interface unit, and the first processor is connected to an optoelectronic transmission module through the interface unit.
[0031] Specifically, it also includes a video surveillance system 5, which is connected to an industrial control computer.
[0032] Specifically, it also includes an auxiliary lighting system 6, which is connected to an industrial control computer.
[0033] Specifically, the perimeter alarm host 2 includes a second processor, an audible and visual alarm unit, and a wireless communication unit, all of which are electrically connected to the second processor.
[0034] Specifically, the fiber optic detector includes a fiber optic vibration sensor.
[0035] Specifically, the industrial control computer 3 is equipped with a third processor and a comparator, and the processor is connected to the comparator.
[0036] Specifically, the optoelectronic transmission module includes an optical transmitter and an optical receiver. The optical transmitter mainly converts electrical signals into optical signals, and the modulated optical signals are coupled into the optical fiber. After transmitting over a certain distance, the optical signals reach the optical receiver, which converts the modulated optical signals back into electrical signals.
[0037] In operation, this invention involves distributing fiber optic detectors on the perimeter fence to be monitored. A fiber optic vibration detection device senses the vibration of the vibration source, and the vibration information is sensed using the vibration principle of the fiber optic vibration sensor. The vibration signal sensed by the fiber optic vibration detection device is transmitted through a fiber optic transmission module and sent to the perimeter alarm host. The perimeter alarm host then sends the detected signal to the central control unit in the monitoring room. The central control unit determines whether the data is abnormal. When an abnormality occurs, it controls the perimeter alarm host to issue an alarm prompt and alerts management personnel for manual intervention. Simultaneously, the data information is displayed on a screen.
[0038] Since the vibration of the fence caused by passing vehicles is a low-frequency vibration, the signal processor processes the digital signal in the frequency domain and identifies a specific signal by the frequency of the signal. The vibration signal caused by the wind blowing the fence and the vibration signal caused by people climbing the fence have different frequency domains. The filtering unit of this utility model is equipped with a frequency filter to filter out high-frequency and low-frequency signals that are not within the set range.
[0039] False alarms can be caused by tree branches falling and hitting the fence, birds landing on the fence, or hail accidentally colliding with the fence. This invention incorporates a comparator in the central control unit to determine whether the signal threshold and signal duration are within the set range. It also uses a counter to record the number of events that occur within a certain period of time, thereby filtering out most of the false alarms caused by these accidental factors. The signal threshold for vibrations caused by tree branches falling and birds flying onto the fence may not meet the set signal threshold requirements. The signal duration for hail or accidental stone impacts may not be long enough. Several events must occur within a certain period of time to generate an alarm signal. Through a series of limitations, most false alarms can be avoided.
[0040] When illegal climbing or damage to the perimeter occurs, the system will promptly send an alarm signal to the security personnel on duty through the perimeter alarm host, and simultaneously control the video surveillance system and auxiliary lighting system to record the process of the illegal intrusion. At the same time, the perimeter alarm host will be activated to dissuade intrusion or the broadcast system will be activated.
[0041] The video surveillance system includes front-end cameras and matrix switching and control equipment in the control center. When any alarm zone at the front end triggers an alarm, the video surveillance system receives the alarm signal and automatically controls the cameras located near the alarm point to switch to monitoring that point through the pre-set linkage relationship within the system. The display shows the relevant information of the alarm point.
[0042] It should be noted that all electronic components used in this utility model are existing products, the connection relationships between the components are conventional technologies in the field, and the calculation methods used are also conventional technologies in the field.
[0043] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A distributed fiber optic vibration detection and alarm system, characterized in that: The system includes a fiber optic vibration detection device (1), a perimeter alarm host (2), an industrial control computer (3), and a display (4). The fiber optic vibration detection device (1) includes a fiber optic detector, a photoelectric transmission module, and a signal processor. The industrial control computer (3) and the display (4) are installed in the monitoring room, and the fiber optic vibration detection device (1) and the perimeter alarm host (2) are installed outside the monitoring room. The fiber optic detectors are distributed near the monitoring perimeter to sense stress changes in the external environment. When an intrusion occurs and vibrations are generated, the signal is processed by the signal processor and transmitted to the perimeter alarm host (2) through the photoelectric transmission module. The perimeter alarm host (2) transmits the data to the industrial control computer (3). The industrial control computer (3) determines whether the data is abnormal and controls the perimeter alarm host (2) to generate alarm information. At the same time, the intrusion location is displayed in real time on the display (4). The signal processor includes an amplification unit, a shaping unit, a filtering unit, an analog-to-digital conversion unit, and a first processor connected in sequence. The first processor is also connected to an interface unit, and the first processor is connected to an optoelectronic transmission module through the interface unit. The industrial control computer (3) is equipped with a third processor, a comparator and a counter, and the processor is connected to the comparator and the counter.
2. The distributed optical fiber vibration detection and alarm system according to claim 1, characterized in that: It also includes a video surveillance system (5), which is connected to an industrial control computer (3).
3. The distributed optical fiber vibration detection and alarm system according to claim 1, characterized in that: It also includes an auxiliary lighting system (6), which is connected to the industrial computer (3).
4. The distributed optical fiber vibration detection and alarm system according to claim 1, characterized in that: The perimeter alarm host (2) includes a second processor, an audible and visual alarm unit, and a wireless communication unit, all of which are electrically connected to the second processor.
5. A distributed optical fiber vibration detection and alarm system according to claim 1, characterized in that: The fiber optic detector includes a fiber optic vibration sensor.
6. A distributed optical fiber vibration detection and alarm system according to claim 1, characterized in that: The optoelectronic transmission module includes an optical transmitter and an optical receiver.