Distributed optical fiber sensing system based on ARM rapid data acquisition and transmission

Abstract

The invention discloses a distributed optical fiber sensing system based on ARM rapid data acquisition and transmission. The distributed optical fiber sensing system comprises an ARM processor; the input control system comprises a signal input module; the signal analysis system comprises a signal receiving module, a signal processing module, a photoelectric conversion module, an electric signal analysis module and an early warning module, the signal receiving module is used for receiving modulated optical signals which pass through a monitoring interval and are acted by external measured parameters, the signal processing module is used for performing front-end processing on the received modulated optical signals to form converted optical signals, and the converted optical signals are sent to the early warning module; the photoelectric conversion module stably converts converted optical signals into electric signals, the electric signal analysis module demodulates the electric signals and obtains measured parameters, and corresponding perimeter security early warning is carried out through the early warning module. According to the invention, the problems of slow data acquisition and transmission speed, high delay, high cost, poor electromagnetic disturbance resistance and limited application range of the existing perimeter security technology can be solved.

Description

Technical Field

[0001] The invention relates to the technical field of optical fiber sensing, in particular to a distributed optical fiber sensing system based on ARM fast data acquisition and transmission. Background Art

[0002] Distributed fiber optic sensing technology is mainly used for efficient detection of physical quantities such as temperature and stress in continuous space and intervals. Today, this technology mainly includes three categories: distributed fiber optic sensing technology based on backward Rayleigh scattering, distributed fiber optic temperature sensing technology based on Raman scattering, and distributed fiber optic temperature / stress sensing technology based on Brillouin scattering.

[0003] Fiber Bragg grating, one of the application carriers of this technology, has the characteristics of docking with optical fiber, stable association, efficient deployment, low transmission loss, good spectral characteristics and high reliability. As an optical sensor device, fiber Bragg grating can realize distributed dynamic observation of different physical quantities through parameter modulation of optical signals. It can effectively overcome the shortcomings of traditional sensing technology and its measurement system in long-term stability, environmental adaptability and distributed sensing detection. It can effectively measure physical quantities such as temperature, strain, vibration, pressure, etc. It is widely used in health monitoring in bridges and tunnels, dam power stations, oil field tanks, mechanical equipment and other fields, and greatly meets the physical quantity measurement requirements for military and civilian applications. However, this technology is rarely used in perimeter security prevention work.

[0004] Conventional designs in the field of perimeter defense mainly include electronic pulse, infrared beam, perimeter monitoring technology, etc. Among them, electronic pulse technology is costly, consumes a lot of power, and is prone to produce electric sparks; infrared beam technology is easily affected by heat sources and terrain; perimeter video monitoring has a limited monitoring range and consumes a lot of power. The above conventional perimeter security technologies have high operating costs and extremely limited scope of use. They cannot be widely promoted and put into use on a large scale. In addition, data collection and transmission speeds are slow, latency is high, they are severely affected by electromagnetic interference, and they have poor environmental adaptability. Summary of the invention

[0005] The purpose of the present invention is to provide a distributed fiber optic sensing system based on ARM for fast data acquisition and transmission in order to solve the problem that the existing perimeter security technology has a very limited scope of use and cannot be widely promoted and put into use on a large scale due to slow data acquisition and transmission speed, high latency, high investment and operating costs, harsh use conditions, high safety requirements, and poor anti-electromagnetic disturbance capabilities.

[0006] In order to achieve the above object, the present invention adopts the following technical solution: a distributed optical fiber sensing system based on ARM fast data acquisition and transmission, comprising:

[0007] ARM processor;

[0008] An input control system, which is associated with the ARM processor and includes a signal input module for light signals emitted by the adjustable light source;

[0009] A signal analysis system, which is associated with the ARM processor, includes a signal receiving module, a signal processing module, a photoelectric conversion module, an electrical signal analysis module, and an early warning module. The signal receiving module is used to receive a modulated optical signal that passes through a monitoring interval and is affected by an external measured parameter. The signal processing module performs front-end processing on the received modulated optical signal to form a converted optical signal, so that the photoelectric conversion module can stably convert the converted optical signal into an electrical signal. The electrical signal analysis module demodulates the electrical signal and obtains the measured parameter. When the measured parameter exceeds a set threshold range, a perimeter security early warning is issued through the early warning module.

[0010] As a further description of the above technical solution:

[0011] The ARM processor is also associated with a data acquisition system, which includes an environmental data monitoring module and a clock module. The environmental data monitoring module monitors the environmental factors in the monitoring interval in real time to form environmental parameter information, and the clock module forms time information corresponding to the environmental parameter information.

[0012] As a further description of the above technical solution:

[0013] The data acquisition system also includes an equipment operation monitoring module associated with the clock module, which monitors the operation status of each module of the optical fiber sensing system in real time to form equipment parameter information, and the clock module forms time information corresponding to the equipment parameter information.

[0014] As a further description of the above technical solution:

[0015] The signal processing module removes background errors from the modulated optical signal based on the environmental parameter information, the device parameter information, and the time information.

[0016] As a further description of the above technical solution:

[0017] The front-end processing of the signal processing module includes signal scaling and filtering processing.

[0018] As a further description of the above technical solution:

[0019] The input control system also includes a signal adjustment module, which is used to adjust the optical parameters of the adjustable light source optical signal emitted by the signal input module. When the parameters of the converted optical signal obtained do not meet the operating conditions of the photoelectric conversion module and the electrical signal analysis module, the signal adjustment module is automatically associated and operated to make the converted optical signal and electrical signal meet the stable operating conditions of subsequent modules.

[0020] As a further description of the above technical solution:

[0021] The early warning module includes at least one of a loudspeaker, a signal light, and a cloud-based early warning platform associated with the early warning module via wireless transmission, which are arranged at the perimeter of the monitoring area or in the on-site control room.

[0022] As a further description of the above technical solution:

[0023] The cloud early warning platform is associated with terminal devices consisting of mobile phones and computers.

[0024] In summary, due to the adoption of the above technical solution, the present invention has the following beneficial effects compared with the prior art:

[0025] 1. In the distributed optical fiber sensing system of the present invention, the ARM processor controls the operation of each system module and transmits signal data. The signal input module controls the adjustable light source to input the optical fiber signal into the system, and makes it pass through the monitoring interval and be affected by the external measured parameters to form a modulated optical signal. The signal receiving module receives the modulated optical signal, and the signal processing module performs front-end processing on it through signal scaling, filtering, etc. to form a converted optical signal. The photoelectric conversion module stably converts the converted optical signal into an electrical signal, and the electrical signal analysis module demodulates and analyzes the electrical signal and obtains the measured parameters. When the measured parameters exceed the set threshold range, the early warning module performs a perimeter security early warning. By using the ARM processor as the main control module, the efficient and fast acquisition and transmission of signal data can be guaranteed, and the low-cost operation and use of the optical fiber sensing system can be realized, which has the characteristics of short system response time, small and light system module, efficient integration of each module, and convenient large-scale deployment and association.

[0026] 2. During system operation, the environmental parameter information and equipment operation information on the system operation timeline are obtained through the environmental data monitoring module and the equipment operation monitoring module, and are summarized and transmitted to the signal processing module. Through its front-end processing, the background error of the converted optical signal is removed, the data of the equipment failure period is screened, and the optical parameters of the optical signal of the optical fiber input of the signal adjustment module are automatically correlated and adjusted, so that the converted optical signal and electrical signal meet the efficient operation conditions of the optoelectronic conversion module and the electrical signal analysis module, making the monitoring of the measured parameters more precise and rapid, and the perimeter security warning more efficient and accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0028] Figure 1 This is a structural diagram of a distributed fiber optic sensing system based on ARM fast data acquisition and transmission. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0031] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0033] In the description of the embodiments of the present invention, it should be noted that the terms "upper", "inner", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are directions or positional relationships in which the inventive product is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0034] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] See also Figure 1 The present invention provides a technical solution: a distributed optical fiber sensing system based on ARM fast data acquisition and transmission, comprising:

[0036] ARM processor;

[0037] An input control system, which is associated with the ARM processor and includes a signal input module for light signals emitted by the adjustable light source;

[0038] The signal analysis system is associated with the ARM processor, and includes a signal receiving module, a signal processing module, an optoelectronic conversion module, an electrical signal analysis module, and an early warning module. The signal receiving module is used to receive a modulated optical signal that passes through a monitoring interval and is affected by an external measured parameter. The signal processing module performs front-end processing on the received modulated optical signal to form a converted optical signal, so that the optoelectronic conversion module can stably convert the converted optical signal into an electrical signal. The electrical signal analysis module demodulates the electrical signal and obtains the measured parameter. When the measured parameter exceeds the set threshold range, the early warning module performs a perimeter security early warning. Among them, the signal analysis system uses an FPGA embedded acquisition card, and the signal data generated during the operation of each module is stored in an SDRAM memory. By using an ARM processor as the main control module, efficient and fast acquisition and transmission of signal data can be guaranteed, and the operation and use of a low-cost optical fiber sensing system can be realized. It has the characteristics of short system response time, small and light system module size, efficient integration of each module, and convenience for large-scale deployment and association.

[0039] The ARM processor is also associated with a data acquisition system, which includes an environmental data monitoring module and a clock module. The environmental data monitoring module monitors the environmental factors of the monitoring interval in real time to form environmental parameter information, and the clock module forms time information corresponding to the environmental parameter information. The environmental parameter information includes environmental parameters corresponding to the measured parameters, such as environmental temperature, structural stress, strain, pressure, etc., and related to the perimeter security monitoring object.

[0040] The data acquisition system also includes an equipment operation monitoring module associated with the clock module, which monitors the operation status of each module of the optical fiber sensing system in real time to form equipment parameter information, and the clock module forms time information corresponding to the equipment parameter information.

[0041] The signal processing module removes background errors from the modulated optical signal based on the environmental parameter information, the device parameter information, and the time information.

[0042] The front-end processing of the signal processing module includes signal scaling and filtering processing.

[0043] The input control system also includes a signal adjustment module, which is used to adjust the optical parameters of the adjustable light source optical signal emitted by the signal input module. When the parameters of the converted optical signal obtained do not meet the operating conditions of the photoelectric conversion module and the electrical signal analysis module, the signal adjustment module is automatically associated and operated to make the converted optical signal and electrical signal meet the stable operating conditions of subsequent modules.

[0044] The early warning module includes at least one of a loudspeaker, a signal light, and a cloud-based early warning platform associated with the early warning module via wireless transmission, which are arranged at the perimeter of the monitoring area or in the on-site control room.

[0045] The cloud early warning platform is associated with terminal devices consisting of mobile phones, computers and other conventional devices.

[0046] The working principle of a distributed optical fiber sensing system based on ARM fast data acquisition and transmission in this embodiment includes: when the system is running, the ARM processor controls the operation of each system module and transmits signal data, the signal input module controls the adjustable light source, inputs the optical fiber optical signal into the system, and makes it pass through the monitoring interval and be affected by the external measured parameters to form a modulated optical signal, the signal receiving module receives the modulated optical signal, the signal processing module performs front-end processing on it through signal scaling, filtering processing, etc. to form a converted optical signal, the photoelectric conversion module stably converts the converted optical signal into an electrical signal, the electrical signal analysis module demodulates and analyzes the electrical signal and obtains the measured parameter, and when the measured parameter exceeds the set threshold range, the early warning module issues a perimeter security early warning.

[0047] During this period, the environmental parameter information and equipment operation information on the system operation timeline are obtained through the environmental data monitoring module and the equipment operation monitoring module, and are summarized and transmitted to the signal processing module. Through its front-end processing, the background error of the converted optical signal is removed, the data of the equipment failure period is screened, and the optical parameters of the optical signal input by the optical fiber of the signal adjustment module are automatically correlated and adjusted, so that the converted optical signal and electrical signal meet the efficient operation conditions of the photoelectric conversion module and the electrical signal analysis module, making the measured parameter monitoring more accurate and fast, and the perimeter security warning more efficient and accurate. The technical indicators can reach the operating standards of data transmission efficiency ≥ 99%, signal delay ≤ 10ms, and signal recognition rate ≥ 99%.

[0048] In summary, due to the adoption of the above technical solution, the distributed optical fiber sensing system based on ARM fast data acquisition and transmission in this embodiment has the following beneficial effects compared with the prior art:

[0049] 1. In the distributed optical fiber sensing system of the present invention, the ARM processor controls the operation of each system module and transmits signal data. The signal input module controls the adjustable light source to input the optical fiber signal into the system, and makes it pass through the monitoring interval and be affected by the external measured parameters to form a modulated optical signal. The signal receiving module receives the modulated optical signal, and the signal processing module performs front-end processing on it through signal scaling, filtering, etc. to form a converted optical signal. The photoelectric conversion module stably converts the converted optical signal into an electrical signal, and the electrical signal analysis module demodulates and analyzes the electrical signal and obtains the measured parameters. When the measured parameters exceed the set threshold range, the early warning module performs a perimeter security early warning. By using the ARM processor as the main control module, the efficient and fast acquisition and transmission of signal data can be guaranteed, and the low-cost operation and use of the optical fiber sensing system can be realized, which has the characteristics of short system response time, small and light system module, efficient integration of each module, and convenient large-scale deployment and association.

[0050] 2. During system operation, the environmental parameter information and equipment operation information on the system operation timeline are obtained through the environmental data monitoring module and the equipment operation monitoring module, and are summarized and transmitted to the signal processing module. Through its front-end processing, the background error of the converted optical signal is removed, the data of the equipment failure period is screened, and the optical parameters of the optical signal of the optical fiber input of the signal adjustment module are automatically correlated and adjusted, so that the converted optical signal and electrical signal meet the efficient operation conditions of the optoelectronic conversion module and the electrical signal analysis module, making the monitoring of the measured parameters more precise and rapid, and the perimeter security warning more efficient and accurate.

[0051] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A distributed optical fiber sensing system based on ARM fast data acquisition and transmission, characterized in that: include: ARM processor; An input control system, which is associated with the ARM processor and includes a signal input module for light signals emitted by the adjustable light source; A signal analysis system, which is associated with the ARM processor, includes a signal receiving module, a signal processing module, a photoelectric conversion module, an electrical signal analysis module, and an early warning module. The signal receiving module is used to receive a modulated optical signal that passes through a monitoring interval and is affected by an external measured parameter. The signal processing module performs front-end processing on the received modulated optical signal to form a converted optical signal, so that the photoelectric conversion module can stably convert the converted optical signal into an electrical signal. The electrical signal analysis module demodulates the electrical signal and obtains the measured parameter. When the measured parameter exceeds a set threshold range, a perimeter security early warning is issued through the early warning module.

2. A distributed optical fiber sensing system based on ARM fast data acquisition and transmission according to claim 1, characterized in that: The ARM processor is also associated with a data acquisition system, which includes an environmental data monitoring module and a clock module. The environmental data monitoring module monitors the environmental factors in the monitoring interval in real time to form environmental parameter information, and the clock module forms time information corresponding to the environmental parameter information.

3. A distributed optical fiber sensing system based on ARM fast data acquisition and transmission according to claim 2, characterized in that: The data acquisition system also includes an equipment operation monitoring module associated with the clock module, which monitors the operation status of each module of the optical fiber sensing system in real time to form equipment parameter information, and the clock module forms time information corresponding to the equipment parameter information.

4. A distributed optical fiber sensing system based on ARM fast data acquisition and transmission according to claim 3, characterized in that: The signal processing module removes background errors from the modulated optical signal based on the environmental parameter information, the device parameter information, and the time information.

5. The distributed optical fiber sensing system based on ARM fast data acquisition and transmission according to claim 1 is characterized in that: The front-end processing of the signal processing module includes signal scaling and filtering processing.

6. The distributed optical fiber sensing system based on ARM fast data acquisition and transmission according to claim 1 is characterized in that: The input control system also includes a signal adjustment module, which is used to adjust the optical parameters of the adjustable light source optical signal emitted by the signal input module. When the parameters of the converted optical signal obtained do not meet the operating conditions of the photoelectric conversion module and the electrical signal analysis module, the signal adjustment module is automatically associated and operated to make the converted optical signal and electrical signal meet the stable operating conditions of subsequent modules.

7. The distributed optical fiber sensing system based on ARM fast data acquisition and transmission according to claim 1 is characterized in that: The early warning module includes at least one of a loudspeaker, a signal light, and a cloud-based early warning platform associated with the early warning module via wireless transmission, which are arranged at the perimeter of the monitoring area or in the on-site control room.

8. The distributed optical fiber sensing system based on ARM fast data acquisition and transmission according to claim 7, characterized in that: The cloud early warning platform is associated with terminal devices consisting of mobile phones and computers.

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