CN111707347A - A method of collecting vibration spectrum big data information around power cables using co-routed optical cables - Google Patents

Abstract

The invention discloses a method for collecting vibration spectrum big data information around a power cable by using an optical cable with the same route. The invention uses the existing power relay accompanying optical cable as a vibration sensor, and connects the power accompanying optical cable into the main body of the optical fiber vibration sensor. ; When the power-accompanying optical cable is disturbed by the outside world, the power-accompanying optical cable is deformed due to vibration, which causes the phase information of the transmitted light in the power-accompanying optical cable to change and generates an optical signal. The optical signal is collected, analyzed and resolved by the host of the optical fiber vibration sensor. The disturbance signal is adjusted and restored, and the signal characteristic parameters of various vibration events are collected, analyzed and extracted. By demodulating and restoring the spectrum information of the vibration signal, the present invention can not only distinguish different vibration source objects, but also can accurately identify malicious intrusions such as knocking, trampling, destroying electric power buried cables and touching channels and manhole covers. Shield the influence of wind, rain, hail and other disturbances.

Description

Using the same route optical cable to collect the vibration spectrum big data information around the power cable method

technical field

The invention relates to the field of power cable monitoring, in particular to a method for collecting vibration spectrum big data information around a power cable by using a co-routed optical cable.

Background technique

At present, there is no research on the vibration spectrum big data information around the power cable in China, and more is to use the optical cable to monitor the abnormal and typical vibration events around the power cable, such as the vibration waveform signal, so as to protect the safety of the power cable.

However, the environment where power cables are located is complex and harsh, and various vibration events with potential damage to power cables often occur. How to identify these vibration events and make further decisions in order to take corresponding measures and provide protection. Then it is necessary to collect a series of big data of vibration signals around the power cable.

We can use the existing power accompanying optical cable to collect the big data of vibration spectrum around the power cable, so as to analyze and extract the data parameters of threatening vibration events. If the same signal is generated at the same place for many times, it means that there is an event here, and we need to be vigilant. . Nowadays, power cables are scattered in every corner of the city and in the wild, especially the power cables and passages that are shallowly buried along the roads. They are in a complex and changeable environment. During urban construction, mechanical equipment is constructed near the power cables. Wild torrents, mountain bursts, etc. will have irreversible damage to power cables.

Therefore, the current state monitoring and early warning capabilities of power cables have great defects, which greatly affects the safety and stable power consumption of power cables for social production and urban life. It is necessary to establish an effective real-time monitoring of the surrounding environment of power cables. necessary mechanism.

Urban buried power cable lines are long, the amount of online real-time monitoring data is huge, and the types of vibration data are rich, which are typical difficulties in big data collection and analysis.

The present invention utilizes the existing power relay to accompany the optical cable to collect the vibration spectrum big data information around the power cable, does not need to re-lay the cable, saves the cost, will greatly promote the development of the power cable safety monitoring technology, and will greatly improve the safety protection of the power cable. great revolutionary significance.

SUMMARY OF THE INVENTION

In view of the above problems, the present invention provides a method for collecting vibration spectrum big data information around the power cable by using the existing power relay accompanying the optical cable, and analyzes and extracts the physical characteristics of the signal data of various vibration events, so as to ensure the safety of the power cable. Monitoring lays the foundation stone.

In order to achieve the above object, the present invention provides a method for collecting vibration spectrum big data information around a power cable by using a co-routed optical cable, including:

S1: Install the optical fiber vibration sensor host and computer equipment in the monitoring room, and the optical fiber vibration sensor host is connected to the existing power accompanying optical cable;

S2: When there is a vibration source around the power cable to generate vibration, the vibration signal is transmitted to the power-accompanying optical cable laid in the same trench as the power cable, the power-accompanying optical cable is deformed, the power-accompanying optical path phase in the optical cable changes, and the power accompanying the optical cable changes. The vibration signal of the vibration source is converted into an optical signal;

S3: The host of the optical fiber vibration sensor monitors the optical signal in the power accompanying optical cable and obtains the spectral physical characteristic parameters of the vibration source through the collection, demodulation and analysis of the optical signal;

S4: Different types of vibration sources have different spectral physical characteristic parameters. By testing and experimenting with different types of vibration sources, the spectral physical characteristic parameters of various vibration sources are obtained, and a large database of one-to-one correspondence between vibration source types and spectral physical characteristic parameters is formed. ;

S5: When there is a vibration source around the power cable to generate vibration, the optical fiber vibration sensor host processes the vibration signal of the vibration source to obtain the spectral physical characteristic parameters corresponding to the vibration source, and compares it with the spectral physical characteristic parameters of the large database And filter to get the corresponding vibration source type.

In a preferred manner, the power-accompanying optical cable is used as a vibration sensor to sense the vibration signal of the vibration source around the power cable and convert the vibration signal into an optical signal, and the optical fiber vibration sensor host is used as a signal processor for the collection of optical signals, Demodulate and analyze and obtain the spectral physical characteristic parameters of the vibration source, the monitoring room computer is connected to the host of the optical fiber vibration sensor as a display and displays the status information of the power accompanying optical cable in real time.

In a preferred manner, the main body of the optical fiber vibration sensor includes: a light source module, which is used for transmitting coherent optical signals to the power-accompanying optical cable; and a power module, which is used for supplying power to the main body of the optical fiber vibration sensor ; Photodiode module, which is used to convert optical signals into electrical signals, and perform filter detection, high-speed acquisition, secondary denoising and filtering, and Fourier transform on the electrical signals to obtain the frequency spectrum of the vibration source Physical characteristic parameters.

The beneficial effects of the present invention are: by demodulating and restoring the spectrum information of the vibration signal, the present invention can not only distinguish different vibration source objects, but also can accurately identify knocking, trampling, destroying electric power buried cables, and the touching of channels and manhole covers, etc. Malicious intrusions can also shield the effects of wind, rain, hail and other disturbances.

Description of drawings

Fig. 1 is the system schematic diagram of the present invention;

Fig. 2 is the frequency spectrum physical characteristic parameter diagram corresponding to the 8Hz vibration source;

Fig. 3 is the frequency spectrum physical characteristic parameter diagram corresponding to the vibration source of 10Hz;

Fig. 4 is the frequency spectrum physical characteristic parameter diagram corresponding to the 39Hz vibration source;

Fig. 5 is a spectrum physical characteristic parameter diagram corresponding to a vibration source with a frequency of 160 Hz.

Detailed ways

As shown in Figure 1, a method of collecting vibration spectrum big data information around a power cable by using a co-routed optical cable according to the present invention includes:

S1: Install the optical fiber vibration sensor host and computer equipment in the monitoring room, and the optical fiber vibration sensor host is connected to the existing power accompanying optical cable;

S2: When there is a vibration source around the power cable to generate vibration, the vibration signal is transmitted to the power-accompanying optical cable laid in the same trench as the power cable, the power-accompanying optical cable is deformed, the power-accompanying optical path phase in the optical cable changes, and the power accompanying the optical cable changes. The vibration signal of the vibration source is converted into an optical signal;

S3: The host of the optical fiber vibration sensor monitors the optical signal in the power accompanying optical cable and obtains the spectral physical characteristic parameters of the vibration source through the collection, demodulation and analysis of the optical signal;

S4: Different types of vibration sources have different spectral physical characteristic parameters. By testing and experimenting with different types of vibration sources, the spectral physical characteristic parameters of various vibration sources are obtained, and a large database of one-to-one correspondence between vibration source types and spectral physical characteristic parameters is formed. ;

S5: When there is a vibration source around the power cable to generate vibration, the optical fiber vibration sensor host processes the vibration signal of the vibration source to obtain the spectral physical characteristic parameters corresponding to the vibration source, and compares it with the spectral physical characteristic parameters of the large database And filter to get the corresponding vibration source type.

As shown in Figure 1, the power accompanying optical cable is used as a vibration sensor to sense the vibration signal of the vibration source around the power cable and convert the vibration signal into an optical signal, and the optical fiber vibration sensor host is used as a signal processor for optical signal processing. Collect, demodulate and analyze to obtain the spectral physical characteristic parameters of the vibration source, the monitoring room computer is connected to the host of the optical fiber vibration sensor as a display and displays the status information of the power accompanying optical cable in real time.

The main body of the optical fiber vibration sensor includes: a light source module, which is used for transmitting coherent optical signals to the power-accompanying optical cable; a power module, which is used for supplying power to the main body of the optical fiber vibration sensor; a photodiode module , the photodiode module is used to convert the optical signal into an electrical signal, and perform filter detection, high-speed acquisition, secondary denoising and filtering, and Fourier transform on the electrical signal to obtain the spectral physical characteristic parameters of the vibration source.

According to the test, it is found that different devices have different spectral responses during operation, which are only related to the inherent characteristics of the object, such as quality, shape, material, etc. For example, the spectral response of a rotary excavator is about 10Hz, and the spectrum of a small excavator is 39Hz. about. Extracting waveform features and analyzing the signal in time domain and frequency domain are mainly realized by short-time Fourier transform. The large database refers to testing as many devices as possible through a large number of experiments in the early stage, analyzing and extracting the response frequency values corresponding to the spectral physical characteristic parameters of each device. Figure 2 shows the spectral physical characteristic parameter map corresponding to a vibration source with a frequency of 8Hz. , Fig. 3 is the spectrum physical characteristic parameter diagram corresponding to the frequency of 10Hz vibration source, Fig. 4 is the frequency spectrum physical characteristic parameter diagram corresponding to the 39Hz vibration source, Fig. 5 is the frequency spectrum physical characteristic parameter corresponding to the 160Hz vibration source picture. In this way, it can be automatically monitored through the computer background: firstly, an alarm occurs when an abnormal frequency occurs, that is, the response frequency value is inconsistent with the noise floor frequency; secondly, when the abnormal frequency is consistent with the response frequency of a certain equipment in the large database, the intrusion can be determined. Device model.

The present invention uses the existing power relay accompanying optical cable as a detection unit to collect the big data of the vibration source around the power cable; through the analysis of the big data, the frequency spectrum information of the vibration source can be obtained; through the frequency spectrum information, different vibration source objects can be distinguished.

The above is only a preferred embodiment of the present invention, but the protection scope of the present invention is not limited to this. The equivalent replacement or change of the inventive concept thereof shall be included within the protection scope of the present invention.

Claims (3)

1. A method for collecting vibration spectrum big data information around a power cable by using a co-route optical cable is characterized by comprising the following steps:

s1: installing an optical fiber vibration sensor host and computer equipment in a monitoring room, wherein the optical fiber vibration sensor host is connected into the existing electric power accompanying optical cable;

s2: when a vibration source generates vibration around the power cable, the vibration signal is transmitted to a power-accompanying optical cable laid in the same channel with the power cable, the power-accompanying optical cable is deformed, the phase of an optical path in the power-accompanying optical cable is changed, and the vibration signal of the vibration source is converted into an optical signal in the power-accompanying optical cable;

s3: monitoring an optical signal in an electric power accompanying optical cable by an optical fiber vibration sensor host, and acquiring, demodulating and analyzing the optical signal to obtain a frequency spectrum physical characteristic parameter of a vibration source;

s4: the method comprises the following steps that spectrum physical characteristic parameters generated by different types of vibration sources are different, the spectrum physical characteristic parameters of the vibration sources are obtained through testing and experiments on the different types of vibration sources, and a large database in which the types of the vibration sources and the spectrum physical characteristic parameters are in one-to-one correspondence is formed;

s5: when a vibration source is arranged around the power cable to generate vibration, the optical fiber vibration sensor host processes a vibration signal of the vibration source to obtain a frequency spectrum physical characteristic parameter corresponding to the vibration source, and compares and screens the frequency spectrum physical characteristic parameter with a frequency spectrum physical characteristic parameter of a large database to obtain a corresponding vibration source type.

2. The method for collecting vibration spectrum big data information around a power cable by using the optical cable with the same route as the claim 1, wherein the power accompanying optical cable is used as a vibration sensor for sensing vibration signals of a vibration source around the power cable and converting the vibration signals into optical signals, the optical fiber vibration sensor host is used as a signal processor for collecting, demodulating and analyzing the optical signals and obtaining spectrum physical characteristic parameters of the vibration source, and the monitoring room computer is used as a display to be connected with the optical fiber vibration sensor host and display the state information of the power accompanying optical cable in real time.

3. The method for collecting vibration spectrum big data information of the periphery of the power cable by using the co-routed optical cable according to claim 1, wherein the optical fiber vibration sensor host comprises: a light source module for emitting a coherent light signal to an electrical companion cable; the power supply module is used for supplying power to the optical fiber vibration sensor host; the photoelectric diode module is used for converting an optical signal into an electric signal, and performing filtering detection, high-speed acquisition, secondary denoising, filtering and Fourier transform on the electric signal to obtain the frequency spectrum physical characteristic parameter of the vibration source.

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