CN111473855A - System for detecting rodent activity of power cable channel by using existing power relay accompanying optical cable - Google Patents

Abstract

The invention discloses a system for detecting the activity of rodents in a cable channel of a power cable by utilizing an existing power relay accompanying optical cable, which comprises an accompanying optical cable, a vibration signal receiving unit, a vibration signal generating unit and an optical analysis host, wherein the accompanying optical cable is used for converting the vibration signal into an optical signal and transmitting the optical signal to the optical analysis host; a power cable laid in the power cable channel while an accompanying optical cable is laid in the power cable channel; an optical analysis host which demodulates the optical signal and obtains position information of rodent activity; a computer for visually displaying positional information of the rodent activity. When a rodent moves around the cable, the optical cable is vibrated along with the movement of the rodent, and the light in the optical cable is disturbed to cause the corresponding change of the phase of the light, namely, the vibration signal is converted into the optical signal. The invention can realize the activity detection of the rodent by utilizing the conventional electric power accompanying optical cable without laying cables again, has low maintenance cost and greatly saves the cost.

Description

Utilize existing power relays to accompany cable-to-power cable trench rodent activity detection system

technical field

The invention relates to an optical cable vibration detection system, in particular to a rodent activity detection system for power cable trenches by using the existing power relay accompanying optical cable.

Background technique

Rodents have strong chewing ability, and most of them are parasitic in the power cable trench, and they inevitably bite the power cable. Once the power cable is bitten by rodents, it will cause regional power outages in light, and fire in serious cases. It is estimated that even the power inspection management department does not know the cable damage point and needs to be manually checked one by one, which undoubtedly increases the time cost and labor cost.

There is no practical, effective and safe and harmless method for rodent detection in power cable trenches. If infrared probes are used for detection, on the one hand, it is difficult to install in cable trenches, especially in closed and narrow cable trenches. It is even more impractical. On the other hand, the manpower input is large, the equipment cost is high, and deflagration is easily caused by the external environment.

At the same time, the infrared probe needs power supply. Once the probe has a problem, the maintenance cost will be higher, and it is impossible to know whether the device is working properly in real time.

SUMMARY OF THE INVENTION

Aiming at the above problems, the present invention provides an optical cable vibration detection system with high reliability, long-term stable use, and economical saving. Check.

In order to achieve the above object, the present invention provides a system for detecting rodent activity in a power cable trench by utilizing an existing power relay accompanying optical cable, the system comprising: an accompanying optical cable, a rodent activity station near the cable in the power cable trench The generated vibration will cause the vibration of the accompanying optical cable, and the accompanying optical cable converts the vibration signal into the optical signal in the optical cable and transmits it to the optical analysis host; the power cable, the power cable is laid in the power cable trench while the power cable is laid in the The accompanying optical cable is laid in the power cable trench; the optical analysis host, the optical analysis host demodulates the optical signal and obtains the precise position and positioning information of the rodent activity; the computer, the display of the computer is used for the rodent. Visual display of precise location positioning information for animal activity.

In a preferred manner, the accompanying optical cable is a three-core optical cable, the optical analysis host is connected to a starting point sensing box, and the starting point sensing box is connected to the starting end of the two-core optical cable in the accompanying optical cable, and the two-core optical cable The end of the fiber optic cable is connected with the end point sensing box; at the same time, the optical analysis host is connected with the start end of the other core optical cable in the accompanying optical cable, and the end of the other core fiber optic cable in the accompanying fiber optic cable is connected with the end point sensing box. ; The starting point sensing box and the ending point sensing box are optical couplers, which are used for splitting and combining optical signals.

In a preferred manner, when the vibration generated by rodents moving around the cable acts on the accompanying optical cable, the optical analysis host sends an optical signal to the two-core optical cable in the three-core optical cable through the starting point sensing box Then, the time elapsed to return to the optical analysis host through the end point sensing box and another optical fiber cable is t1; The time elapsed for the end point sensing box, the two-core optical cable and the starting point sensing box to return to the optical analysis host is t2. The time delay caused by vibration is t1-t2, then the distance x between the vibration location and the optical analysis host is:

x=L-(t1-t2)/2*c

Among them, c is the speed of light, and L is the total length of the accompanying optical cable; the optical analysis host can calculate the positioning information of rodents around the cable through the measured time t1, t2 and the above formula.

In a preferred manner, the optical analysis host and the computer are installed in a monitoring room for real-time monitoring of the power cable by relevant staff.

In a preferred manner, distributed optical fiber vibration early warning system software is installed in the computer, and the precise location information of rodent activity obtained by the analysis of the optical analysis host is transmitted to the distributed optical fiber vibration early warning system software and displayed visually, And the precise location and positioning information of the rodent's activities is sent to the relevant staff through short messages.

In a preferred manner, the precise location information of the vibration intrusion area of each rodent activity is stored in the distributed optical fiber vibration early warning system software of the computer in the form of a log, and the distributed optical fiber vibration early warning system software is every certain period of time. The log is automatically analyzed, and then the precise location and positioning information of the vibration invasion area where rodents often move is sent to the relevant staff and responsible leaders through text messages.

In a preferred manner, the optical analysis host sends an alarm of a vibration intrusion event of rodent activity to the distributed optical fiber vibration early warning system software, and the alarm signal is represented by a flag in the visual interface of the distributed optical fiber vibration early warning system software. A vibration intrusion event of rodent activity; when the alarm signal representing the vibration intrusion event of rodent activity exceeds a certain intensity, the frequency of the vibration intrusion event representing rodent activity is too high, and the flag turns red.

The beneficial effects of the present invention are as follows: the present invention can realize rodent activity detection by using the existing power accompanying the optical cable, without re-routing the cable, the maintenance cost is low, the cost is greatly saved, the safety of the power cable is protected, and the long-term safe use can be realized.

Description of drawings

Fig. 1 is the overall scheme schematic diagram of the present invention;

Figure 2 is a schematic diagram of rodent activity;

Fig. 3 is the monitoring interface schematic diagram of software in the present invention;

Figure 4 is a schematic diagram of the connection between the optical analysis host and the accompanying cable.

Detailed ways

As shown in FIG. 1, the present invention utilizes an existing power relay accompanying optical cable to detect rodent activity in a power cable trench. The system includes: an accompanying optical cable, which is generated by rodent activity near the cable in the power cable trench. The vibration of the accompanying optical cable will cause the vibration of the accompanying optical cable, and the accompanying optical cable converts the vibration signal into the optical signal in the optical cable and transmits it to the optical analysis host; the power cable, the power cable is laid in the power cable trench while the power cable is installed in the power cable. An accompanying optical cable is laid in the cable trench; an optical analysis host, the optical analysis host demodulates the optical signal and obtains the precise position and positioning information of the rodent activity; a computer, the display of the computer is used to display the rodent Visual display of precise location positioning information for the activity.

As shown in FIG. 1 , the optical analysis host and the computer are installed in a monitoring room for real-time monitoring of power cables by relevant staff.

Figure 2 is a schematic diagram of the activity of rodents. The present invention uses the accompanying optical cable laid in the same groove as the power cable. Once rodents are active in the cable, that is, the surrounding of the optical cable laid in the same groove, the accompanying optical cable will be vibrated. When the light in the optical cable is disturbed, its phase will change accordingly, that is, the vibration signal is converted into an optical signal, and the optical signal is transmitted to the optical analysis host. .

As shown in Figure 3, the distributed optical fiber vibration early warning system software is installed in the computer, and the precise location information of rodent activity obtained by the analysis of the optical analysis host is transmitted to the distributed optical fiber vibration early warning system software and visualized display, and send the precise location and positioning information of the rodent activity to the relevant staff through short messages.

As shown in Figure 3, the precise location information of the vibration intrusion area of each rodent activity is stored in the distributed optical fiber vibration early warning system software of the computer in the form of a log, and the distributed optical fiber vibration early warning system software is stored every interval The log is automatically analyzed for a certain period of time, and then the precise location information of the vibration invasion area where rodents are often active is sent to the relevant staff and responsible leaders through text messages. Relevant leaders take corresponding measures according to the regional information of rodent activities, such as physical protection, medical protection, etc.

As shown in Figure 3, the optical analysis host sends an alarm of the vibration intrusion event of rodent activity to the distributed optical fiber vibration early warning system software, and the alarm signal passes through one of the visual interfaces of the distributed optical fiber vibration early warning system software. The flag represents a vibration intrusion event of rodent activity, and the system monitors the entire optical cable network connected to the optical analysis host in real time, that is, monitors the location of the cable network corresponding to the entire optical cable network; The flag turns red when the alarm signal exceeds a certain intensity, indicating an excessive frequency of vibratory intrusion events from rodent activity.

As shown in FIG. 4 , the accompanying optical cable is a three-core optical cable, the optical analysis host is connected to the starting point sensing box, and the starting point sensing box is connected to the starting end of the two-core optical fiber cable in the accompanying optical cable, and the two The end of the core optical cable is connected with the end point sensing box; at the same time, the optical analysis host is connected with the start end of another core optical cable in the accompanying optical cable, and the end of the other core optical cable in the accompanying optical cable is connected with the end point sensing box. The boxes are connected; the starting point sensing box and the ending point sensing box are optical couplers, which are used for splitting and combining optical signals.

As shown in FIG. 4 , when the vibration generated by rodents moving around the cable acts on the accompanying optical cable, laser light is emitted from the TX side, that is, the optical analysis host sends the light to the three-core through the starting point sensing box. The time elapsed for the two-core optical cable in the optical cable to transmit the optical signal and then return to the optical analysis host through the end sensing box and the other core optical cable is t1; the laser is emitted from the RX side, that is, the optical analysis host simultaneously sends the signal to the optical analysis host. The time elapsed for the other core optical cable in the three-core optical cable to transmit the optical signal and then return to the optical analysis host through the end sensing box, the two-core optical cable and the starting point sensing box is t2. The time delay of the optical signal sent by the two-core optical cable and the other core optical cable in the core optical cable due to vibration is t1-t2, then the distance x between the location of the vibration and the optical analysis host is:

x=L-(t1-t2)/2*c

Among them, c is the speed of light, and L is the total length of the accompanying optical cable; the optical analysis host can calculate the positioning information of rodents around the cable through the measured time t1, t2 and the above formula.

The system can be used for intrusion detection, but is not limited to rodent activity detection in power cable trenches.

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 (7)

1. A system for detecting rodent activity in a power cable raceway using existing power relays along with optical cables, the system comprising: the vibration of the accompanying optical cable is caused by the vibration generated by the rodent activity near the cable in the cable trench of the power cable, and the accompanying optical cable converts the vibration signal into an optical signal in the optical cable and transmits the optical signal to the optical analysis host; a power cable laid in the power cable channel while an accompanying optical cable is laid in the power cable channel; an optical analysis host which demodulates the optical signal and obtains accurate position positioning information of the rodent activity; and the display of the computer is used for visually displaying the accurate position positioning information of the rodent activity.

2. The system for detecting rodent activity in a power cable trench by using the existing power relay-associated optical cable according to claim 1, wherein the associated optical cable is a three-core optical cable, the optical analysis host is connected with a starting point sensing box, the starting point sensing box is connected with the starting end of a two-core optical cable in the associated optical cable, and the tail end of the two-core optical cable is connected with a terminal point sensing box; meanwhile, the optical analysis host is connected with the starting end of the other optical cable in the accompanying optical cables, and the tail end of the other optical cable in the accompanying optical cables is connected with the terminal point sensing box; the starting point sensing box and the end point sensing box are optical couplers and are used for splitting and combining optical signals.

3. The system for detecting the rodent activity in the cable channel of the power cable by utilizing the existing power relay accompanying optical cable as claimed in claim 1, wherein when vibration generated by the rodent moving around the cable acts on the accompanying optical cable, the optical analysis host transmits a light signal to the two-core optical cable in the three-core optical cable through the starting point sensing box and then transmits back to the optical analysis host through the finishing point sensing box and the other-core optical cable for t 1; the time that the optical analysis host transmits a light signal to the other optical cable in the three-core optical cable simultaneously and then transmits the light signal back to the optical analysis host through the end point sensing box, the two-core optical cable and the starting point sensing box is t2, the time delay of the light signals respectively transmitted from the two-core optical cable and the other optical cable in the three-core optical cable due to vibration is t1-t2, and the distance x between the vibration positioning place and the optical analysis host is:

x＝L-(t1-t2)/2*c

wherein c is the speed of light, L is the total length of the accompanying optical cable, and the positioning information of the rodent moving around the cable can be calculated by the optical analysis host through the measured time t1, t2 and the formula.

4. The system for detecting rodent activity in a power cable raceway using existing power relay-accompanied optical cables as claimed in claim 1, wherein said optical analysis host and said computer are installed in a monitoring room for real-time monitoring of the power cable by the relevant staff.

5. The system for detecting the rodent activity in the power cable trench by using the existing power relay-accompanied optical cable as claimed in claim 1, wherein the computer is installed with distributed optical fiber vibration early warning system software, and the accurate position positioning information of the rodent activity analyzed by the optical analysis host is transmitted to the distributed optical fiber vibration early warning system software for visual display, and is sent to the related staff by short messages.

6. The system for detecting the activity of the rodent in the cable trench of the power cable by utilizing the existing power relay-accompanied optical cable as claimed in claim 1, wherein the accurate position location information of the vibration invasion area of the rodent per time activity is stored in the distributed optical fiber vibration early warning system software of the computer in the form of log, the distributed optical fiber vibration early warning system software automatically analyzes the log at certain intervals, and then the accurate position location information of the vibration invasion area of the rodent which frequently moves is sent to related staff and responsible leaders through short messages.

7. The system for detecting rodent activity in a power cable trench by using the existing power relay-accompanied optical cable according to claim 1, wherein the optical analysis host alarms the distributed optical fiber vibration pre-warning system software about the vibration intrusion event of the rodent activity, and the alarm signal represents the vibration intrusion event of the rodent activity through a flag in a visual interface of the distributed optical fiber vibration pre-warning system software; when the alarm signal of the vibration invasion event indicating the rodent activity exceeds a certain intensity, the occurrence frequency of the vibration invasion event indicating the rodent activity is too high, and the flag turns red.

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