Pulse electronic fence perimeter monitoring system for strip mine

Abstract

The invention discloses a pulse electronic fence perimeter monitoring system for a strip mine, and relates to the technical field of electronic fences, and the pulse electronic fence perimeter monitoring system comprises a vibration current detection module, a contact detection module, a current increase detection module and a branch judgment module, the contact detection module monitors the coverage point distance when the electronic fence is in contact with an object so as to estimate the weight range of the object in contact when the object is assumed to be a branch, and the current increase detection module is used for detecting the current increase amplitude and duration of the electronic fence caused by rainwater; the branch judgment module is used for calculating the probability that branches stained with water make contact with the electronic fence and deciding whether sound-light alarming is conducted or not, and the contact detection module comprises a position recording module, an area calculation module and a weight estimation module.

Description

Technical Field

[0001] The invention relates to the technical field of electronic fences, in particular to a pulse electronic fence perimeter monitoring system for an open-pit mine. Background Art

[0002] The area surrounding the open-pit mine is usually an ecologically sensitive area, surrounded by forests and wildlife habitats. Some wild animals may try to enter the mine in search of food. The pulse electronic fence perimeter monitoring system is a security technology based on electrical principles. The system can detect external intrusions in a timely manner by monitoring the current changes around the fence. When the pulse electrical signal of the fence is short-circuited, the system will alarm in time.

[0003] The most common contacts detected by the electronic fence in the open-pit mine area are branches blown by the wind and wild animals, and wild animals need to be driven away through sound and light alarms. In the existing technology, branches without water are generally not conductive, while branches with water are conductive like the bodies of wild animals, which will cause the system to be unable to make accurate judgments, causing false alarms and disturbing the surrounding ecological environment. If cameras or wind sensors are used as assistance, the equipment cost will increase and the judgment will not be timely. Therefore, it is necessary to design a pulse electronic fence perimeter monitoring system for open-pit mines with accurate measurement. Summary of the invention

[0004] The object of the present invention is to provide a pulse electronic fence perimeter monitoring system for an open-pit mine to solve the problems raised in the above-mentioned background technology.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: a pulse electronic fence perimeter monitoring system for an open-pit mine, comprising a vibration current detection module, a contact detection module, a current increase detection module, and a branch judgment module. The vibration current detection module is used to detect the current fluctuation caused by the vibration of the fence caused by wind, so as to evaluate the current wind strength. The contact detection module monitors the coverage point distance when the electronic fence contacts an object to estimate the weight range of the contact object when it is assumed to be a branch. The current increase detection module is used to detect the amplitude and duration of the increase in the current of the electronic fence caused by rain. The branch judgment module is used to calculate the probability of a branch with water contacting the electronic fence, and decide whether to issue an audible and visual alarm.

[0006] According to the above technical solution, the vibration current detection module includes an anemometer, a current detection unit, a data acquisition module, a pulse current generating unit, and a wind force calculation module. The anemometer is electrically connected to the data acquisition module, the data acquisition module is electrically connected to the current detection unit, the pulse current generating unit is electrically connected to the current detection unit, the anemometer is used to detect the current wind speed, the current detection unit is used to detect the current of each contact point on the electronic fence, the data acquisition module is used to record and transmit the current data and wind force data, the pulse current generating unit is used to provide pulse current for each contact point on the electronic fence, and the wind force calculation module is used to calculate the current wind force according to the current fluctuation data; The contact detection module includes a position recording module, an area calculation module, and a weight estimation module. The position recording module is electrically connected to the current detection unit, the area calculation module is electrically connected to the position recording module, and the weight estimation module is electrically connected to the area calculation module. The position recording module is used to record the coordinate position of each contact point, the area calculation module is used to calculate the area of ​​the object in contact with the electronic fence, and the weight estimation module is used to estimate the weight of the object in contact with the electronic fence; The current increase detection module includes a timing module, an increase amplitude recording module, and a rainfall judgment module. The timing module and the increase amplitude recording module are both electrically connected to the rainfall judgment module. The timing module is used to calculate the time of current increase caused by the unstable conductive path formed by ions on the electronic fence. The increase amplitude recording module is used to calculate the amplitude of current increase. The rainfall judgment module is used to calculate the current rainfall according to the amplitude and time of current increase, and judge whether the current rainfall will cause the branches to be wet with enough water.

[0007] According to the above technical solution, the working method of the system is: S1. In windy weather, place an anemometer above the electronic fence, detect the current wind speed for a period of time, and record the current at each contact point on the electronic fence in real time, calculate the wind force corresponding to each wind speed, and calculate the weight of the branches that can be driven by each wind force; S2. When an object contacts a contact point on the electronic fence and generates a short-circuit phenomenon of a pulse electrical signal, the coordinates of each short-circuited contact point are recorded, and the contour area formed by these contact points is calculated, the weight of the branch under the current contour area is estimated, and it is determined whether the current wind force can drive the branch of this weight; S3. When the current at all the contact points on the electronic fence increases slightly, it is judged that it is raining weather. The current rainfall is calculated based on the average amplitude and duration of the increase in the current at the contact points, and it is judged whether the rainfall will cause the branches to be stained with water that is sufficient to conduct electricity. S4. Only when it is determined that the wind is strong enough to move branches of this weight and the rainfall causes the branches to be stained with water that is conductive enough, will the object touching the electronic fence be judged to be a wet branch. In this case, no action will be taken immediately. In other cases, an audible and visual alarm will be sent to the electronic fence.

[0008] According to the above technical solution, S1 includes: S1-1. The specific process of real-time recording the current magnitude of each contact point on the electronic fence is as follows: When the anemometer reading is 0, record the current magnitude of each contact point ,in is the number of contact points; S1-2, the wind speeds of various sizes detected by the anemometer When the wind speed is divided into intervals of equal size Group, record the current of the contact point under each wind speed group , , …, ; S1-3, subtract the current size of each contact point when the anemometer reading is 0 from the current size of the contact point under each group of wind speeds, and obtain the current fluctuation value under each group of wind speeds. Detect the current size of each contact point in real time and calculate the current fluctuation value. When it is close to the current fluctuation value under a certain group of wind speeds, query the corresponding wind speed size, which is the current wind speed; S1-4. The specific process of calculating the weight of branches driven by each wind force is as follows: ,in It is the conversion coefficient between the square of the wind speed measured in the actual test and the weight of the branches it can drive.

[0009] According to the above technical solution, in S2, the coordinates of the two short-circuited contact points with the longest distance within the specified range on the electronic fence are found, and the distance between the two coordinates is the maximum length of the object. A contour line is drawn between the two short-circuited contact points with the longest distance. The contour line must surround all other short-circuited contact points, and the area enclosed by the contour line is the area of ​​the contact surface between the object and the electronic fence. , calculate the weight of this object ,in is the average density coefficient of the branches, only when At this time, the current wind force is able to move branches of this weight.

[0010] According to the above technical solution, in S3, the current magnitude of each contact point is recorded in real time, and only when the current magnitude of each contact point is in a certain range, The state of slight increase and stability for one measurement cycle When the current does not change within a certain period of time, the wind interference factor is eliminated and the current at the contact point is recorded. , and calculate the average amplitude of the current increase , multiplied by the duration of the slight increase in current , calculate rainfall ,in is the conversion factor between rainfall and current increase. When the branches are wet enough, they will be conductive enough to conduct electricity. The threshold for branch wetting that causes conductivity.

[0011] According to the above technical solution, in S4, when the sound and light alarm is performed, if it is judged that it is raining weather at this time, the decibel level of the sound and light alarm is It is necessary to lower the alarm decibel level to prevent electric shock. ,in is the background noise coefficient caused by rainfall.

[0012] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: the present invention determines how many branches the current wind can drive by detecting the current fluctuation caused by the vibration of the fence itself caused by the wind, and estimates whether it meets the weight range by detecting the distance of the contact part coverage point on the electronic fence, and at the same time, detects the current increase amplitude and time caused by the unstable conductive path formed by ions on the electronic fence caused by rain, so as to determine whether the current rainfall will cause the branches to be stained with enough water, thereby calculating the probability that the electronic fence touches the branches stained with water, so as to decide whether to issue an audible and visual alarm. This judgment method can make a judgment at the moment the object contacts the electronic fence, and does not require any other sensing or monitoring equipment, and is low in cost and quick in response. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings: Figure 1 It is a schematic diagram of the overall module structure of the present invention. DETAILED DESCRIPTION

[0014] 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.

[0015] See also Figure 1The present invention provides a technical solution: a pulse electronic fence perimeter monitoring system for an open-pit mine, comprising a vibration current detection module, a contact detection module, a current increase detection module, and a branch judgment module. The vibration current detection module is used to detect the current fluctuation caused by the vibration of the fence caused by wind, so as to evaluate the current wind strength. The contact detection module monitors the distance between the coverage point when the electronic fence contacts the object, so as to estimate the weight range of the contact object when it is assumed to be a branch. The current increase detection module is used to detect the increase amplitude and duration of the electronic fence current caused by rain. The branch judgment module is used to calculate the probability of the branches with water contacting the electronic fence, and decide whether to issue an audible and visual alarm. The vibration current detection module includes an anemometer, a current detection unit, a data acquisition module, a pulse current generating unit, and a wind force calculation module. The anemometer is electrically connected to the data acquisition module, the data acquisition module is electrically connected to the current detection unit, the pulse current generating unit is electrically connected to the current detection unit, the anemometer is used to detect the current wind speed, the current detection unit is used to detect the current of each contact point on the electronic fence, the data acquisition module is used to record and transmit the current data and wind force data, the pulse current generating unit is used to provide pulse current for each contact point on the electronic fence, and the wind force calculation module is used to calculate the current wind force according to the current fluctuation data; The contact detection module includes a position recording module, an area calculation module, and a weight estimation module. The position recording module is electrically connected to the current detection unit, the area calculation module is electrically connected to the position recording module, and the weight estimation module is electrically connected to the area calculation module. The position recording module is used to record the coordinate position of each contact point, the area calculation module is used to calculate the area of ​​the object in contact with the electronic fence, and the weight estimation module is used to estimate the weight of the object in contact with the electronic fence; The current increase detection module includes a timing module, an increase amplitude recording module, and a rainfall judgment module. The timing module and the increase amplitude recording module are both electrically connected to the rainfall judgment module. The timing module is used to calculate the time of the current increase caused by the unstable conductive path formed by ions on the electronic fence. The increase amplitude recording module is used to calculate the amplitude of the current increase. The rainfall judgment module is used to calculate the current rainfall according to the amplitude and time of the current increase, and judge whether the current rainfall will cause the branches to be stained with enough water. The system works as follows: S1. In windy weather, place an anemometer above the electronic fence, detect the current wind speed for a period of time, and record the current at each contact point on the electronic fence in real time, calculate the wind force corresponding to each wind speed, and calculate the weight of the branches that can be driven by each wind force; S2. When an object contacts a contact point on the electronic fence and generates a short-circuit phenomenon of a pulse electrical signal, the coordinates of each short-circuited contact point are recorded, and the contour area formed by these contact points is calculated, the weight of the branch under the current contour area is estimated, and it is determined whether the current wind force can drive the branch of this weight; S3. When the current at all the contact points on the electronic fence increases slightly, it is judged that it is raining weather. The current rainfall is calculated based on the average amplitude and duration of the increase in the current at the contact points, and it is judged whether the rainfall will cause the branches to be stained with water that is sufficient to conduct electricity. S4. Only when it is determined that the wind can move branches of this weight and the rainfall causes the branches to be stained with enough conductive water, will the object touching the electronic fence be determined to be a wet branch. In this case, no action will be taken immediately. In other cases, an audible and visual alarm will be sent to the electronic fence. S1 includes: S1-1. The specific process of real-time recording the current magnitude of each contact point on the electronic fence is as follows: When the anemometer reading is 0, record the current magnitude of each contact point ,in is the number of contact points; S1-2, the wind speeds of various sizes detected by the anemometer When the wind speed is divided into intervals of equal size Group, record the current of the contact point under each wind speed group , , …, ; S1-3, subtract the current size of each contact point when the anemometer reading is 0 from the current size of the contact point under each group of wind speeds, and obtain the current fluctuation value under each group of wind speeds. Detect the current size of each contact point in real time and calculate the current fluctuation value. When it is close to the current fluctuation value under a certain group of wind speeds, query the corresponding wind speed size, which is the current wind speed; S1-4. The specific process of calculating the weight of branches driven by each wind force is as follows: ,in The conversion factor between the square of the wind speed measured in the actual test and the weight of the branches that can be driven; In S2, find the coordinates of the two short-circuit contact points with the longest distance within the specified range on the electronic fence. The distance between the two coordinates is the maximum length of the object. Draw a contour line between the two short-circuit contact points with the longest distance. The contour line must surround all other short-circuit contact points. The area enclosed by the contour line is the area of ​​the contact surface between the object and the electronic fence. , calculate the weight of this object ,in is the average density coefficient of the branches, only when When the current wind force is strong enough to move the branches of this weight; In S3, the current magnitude of each contact point is recorded in real time. The state of slight increase and stability for one measurement cycle When the current does not change within a certain period of time, the wind interference factor is eliminated and the current at the contact point is recorded. , and calculate the average amplitude of the current increase , multiplied by the duration of the slight increase in current , calculate rainfall ,in is the conversion factor between rainfall and current increase. When the branches are wet enough, they will be conductive enough to conduct electricity. The threshold for branch wetting to cause electrical conduction; In S4, the calculation method of the time and magnitude of the sound and light alarm to the electronic fence is: when it is determined to be a wild animal, the sound and light alarm time is , according to the contact area between the object in S2 and the electronic fence , the decibel level of the sound and light alarm ,in The conversion factor between the size of the wild animal and the alarm decibel. If there is still no change, the alarm is turned to manual processing. If the contact point coordinates change, the number of short-circuit contact points after the change is calculated. If the number decreases, there is no need to sound and light alarm. If the number increases, it is applied decibel of size; In S4, when the sound and light alarm is performed, if it is judged that it is raining weather, the decibel level of the sound and light alarm is It is necessary to lower the alarm decibel level to prevent electric shock. ,in is the background noise coefficient caused by rainfall.

[0016] The vibration of the fence caused by wind will lead to the movement of the contact point, such as loose joints or displacement of wires, which will cause changes in contact resistance and bring about current fluctuations. The impact of this current fluctuation on different contact points is different, but roughly follows a linear relationship. By detecting the current fluctuation caused by the vibration of the fence itself caused by the wind, it is determined that the current wind can drive multiple branches. At the same time, by detecting the distance of the contact part coverage point on the electronic fence, it is estimated whether it meets the weight range. At the same time, the current increase amplitude and time caused by the unstable conductive path formed by ions on the electronic fence caused by rain are detected to determine whether the current rainfall will cause the branches to be stained with enough water. In this way, the probability that the electronic fence touches a branch stained with water is calculated, so as to decide whether to apply an audible and visual alarm. This judgment method can be judged at the moment when the object touches the electronic fence, and does not require any other sensing or monitoring equipment. It is low-cost and responsive.

[0017] This method can effectively reduce the probability of misjudging a wet branch as a wild animal, and can respond the first time it is touched, with the characteristics of high accuracy and timely response.

[0018] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0019] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A pulse electronic fence perimeter monitoring system for open-pit mines, characterized by: It includes a vibration current detection module, a contact detection module, a current increase detection module, and a branch judgment module. The vibration current detection module is used to detect the current fluctuation caused by the vibration of the fence caused by wind, so as to evaluate the current wind strength. The contact detection module monitors the coverage point distance when the electronic fence contacts the object, so as to estimate the weight range of the contact object when it is assumed to be a branch. The current increase detection module is used to detect the increase amplitude and duration of the electronic fence current caused by rain. The branch judgment module is used to calculate the probability of a branch with water contacting the electronic fence, and decide whether to issue an audible and visual alarm.

2. The pulse electronic fence perimeter monitoring system for an open-pit mine according to claim 1, characterized in that: The vibration current detection module includes an anemometer, a current detection unit, a data acquisition module, a pulse current generating unit, and a wind force calculation module. The anemometer is electrically connected to the data acquisition module, the data acquisition module is electrically connected to the current detection unit, the pulse current generating unit is electrically connected to the current detection unit, the anemometer is used to detect the current wind speed, the current detection unit is used to detect the current of each contact point on the electronic fence, the data acquisition module is used to record and transmit the current data and wind force data, the pulse current generating unit is used to provide pulse current for each contact point on the electronic fence, and the wind force calculation module is used to calculate the current wind force according to the current fluctuation data; The contact detection module includes a position recording module, an area calculation module, and a weight estimation module. The position recording module is electrically connected to the current detection unit, the area calculation module is electrically connected to the position recording module, and the weight estimation module is electrically connected to the area calculation module. The position recording module is used to record the coordinate position of each contact point, the area calculation module is used to calculate the area of ​​the object in contact with the electronic fence, and the weight estimation module is used to estimate the weight of the object in contact with the electronic fence; The current increase detection module includes a timing module, an increase amplitude recording module, and a rainfall judgment module. The timing module and the increase amplitude recording module are both electrically connected to the rainfall judgment module. The timing module is used to calculate the time of current increase caused by the unstable conductive path formed by ions on the electronic fence. The increase amplitude recording module is used to calculate the amplitude of current increase. The rainfall judgment module is used to calculate the current rainfall according to the amplitude and time of current increase, and judge whether the current rainfall will cause the branches to be wet with enough water.

3. The pulse electronic fence perimeter monitoring system for an open-pit mine according to claim 2, characterized in that: The system works as follows: S1. In windy weather, place an anemometer above the electronic fence, detect the current wind speed for a period of time, and record the current at each contact point on the electronic fence in real time, calculate the wind force corresponding to each wind speed, and calculate the weight of the branches that can be driven by each wind force; S2. When an object contacts a contact point on the electronic fence and generates a short-circuit phenomenon of a pulse electrical signal, the coordinates of each short-circuited contact point are recorded, and the contour area formed by these contact points is calculated, the weight of the branch under the current contour area is estimated, and it is determined whether the current wind force can drive the branch of this weight; S3. When the current at all the contact points on the electronic fence increases slightly, it is judged that it is raining weather. The current rainfall is calculated based on the average amplitude and duration of the increase in the current at the contact points, and it is judged whether the rainfall will cause the branches to be stained with water that is sufficient to conduct electricity. S4. Only when it is determined that the wind is strong enough to move branches of this weight and the rainfall causes the branches to be stained with water that is conductive enough, will the object touching the electronic fence be judged to be a wet branch. In this case, no action will be taken immediately. In other cases, an audible and visual alarm will be sent to the electronic fence.

4. The pulse electronic fence perimeter monitoring system for an open-pit mine according to claim 3, characterized in that: The S1 includes: S1-1. The specific process of real-time recording the current magnitude of each contact point on the electronic fence is as follows: When the anemometer reading is 0, record the current magnitude of each contact point ,in is the number of contact points; S1-2, the wind speeds of various sizes detected by the anemometer When the wind speed is divided into intervals of equal size Group, record the current of the contact point under each wind speed group , , …, ; S1-3, subtract the current size of each contact point when the anemometer reading is 0 from the current size of the contact point under each group of wind speeds, and obtain the current fluctuation value under each group of wind speeds. Detect the current size of each contact point in real time and calculate the current fluctuation value. When it is close to the current fluctuation value under a certain group of wind speeds, query the corresponding wind speed size, which is the current wind speed; S1-4. The specific process of calculating the weight of branches driven by each wind force is as follows: ,in It is the conversion coefficient between the square of the wind speed measured in the actual test and the weight of the branches it can drive.

5. The pulse electronic fence perimeter monitoring system for an open-pit mine according to claim 4, characterized in that: In S2, find the coordinates of the two short-circuit contact points with the longest distance within the specified range on the electronic fence. The distance between the two coordinates is the maximum length of the object. Draw a contour line between the two short-circuit contact points with the longest distance. The contour line must surround all other short-circuit contact points. The area enclosed by the contour line is the area of ​​the contact surface between the object and the electronic fence. , calculate the weight of this object ,in is the average density coefficient of the branches, only when At this time, the current wind force is able to move branches of this weight.

6. The pulse electronic fence perimeter monitoring system for an open-pit mine according to claim 5, characterized in that: In S3, the current magnitude of each contact point is recorded in real time. Only when the current magnitude of each contact point is in a certain range, The state of slight increase and stability for one measurement cycle When the current does not change within a certain period of time, the wind interference factor is eliminated and the current at the contact point is recorded. , and calculate the average amplitude of the current increase , multiplied by the duration of the slight increase in current , calculate rainfall ,in is the conversion factor between rainfall and current increase. When the branches are wet enough, they will be conductive enough to conduct electricity. The threshold for branch wetting that causes conductivity.

7. The pulse electronic fence perimeter monitoring system for an open-pit mine according to claim 6, characterized in that: In S4, the calculation method of the time and size of the sound and light alarm to the electronic fence is: when it is determined to be a wild animal, the sound and light alarm time is , according to the contact area between the object in S2 and the electronic fence , the decibel level of the sound and light alarm ,in The conversion factor between the size of the wild animal and the alarm decibel. If there is still no change, the alarm is turned to manual processing. If the contact point coordinates change, the number of short-circuit contact points after the change is calculated. If the number decreases, there is no need to sound and light alarm. If the number increases, it is applied Size of decibels.

8. The pulse electronic fence perimeter monitoring system for an open-pit mine according to claim 7, characterized in that: In S4, when the sound and light alarm is performed, if it is judged that it is raining weather at this time, the decibel level of the sound and light alarm is It is necessary to lower the alarm decibel level for electric shock protection correction. ,in is the background noise coefficient caused by rainfall.

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