WO2020107358A1 - Electronic fence system and control device thereof - Google Patents

Abstract

A control device (100) for use in an electronic fence, comprising: a first apparatus (101), used for producing a tensile force signal and a control signal based on the tensile force signal; and a second apparatus (102), used for receiving the control signal and controlling the voltage output in response to the control signal.

Description

Electronic fence system and its control equipment Technical field

The invention relates to an electronic fence system, in particular to a control device used for the electronic fence system.

Background technique

The electronic fence using electric pulse is one of the more advanced perimeter alarm systems. The electronic fence is composed of a high-voltage electronic pulse host (for example, a pulse generator) and a detection fence. The main principle is that the electronic pulse host generates and receives high-voltage pulse signals, and can generate an alarm signal when the current detection fence is in contact with the network, open circuit, or short circuit. Examples of pulsed electronic fences include, for example, the "smart electronic fence" disclosed in Chinese utility model patent CN2703088 and the "heartbeat-type detection electronic fence sensor system and detection method" disclosed in Chinese invention patent application CN101520933.

Compared with the infrared induction alarm system, the false alarm rate of the pulsed electronic fence is relatively reduced, but there are still problems such as false alarms caused by unintentional touch; in addition, a common problem with the pulsed electronic fence is that Under normal working conditions, the generation of pulsed high voltage is continuous, usually the pulse interval is about 1.5 seconds, and the residence time on the electronic fence is about 0.1 seconds, which causes high energy loss.

Summary of the invention

In view of the current widespread problems of the perimeter defense alarm system including pulse-type electronic fences, the present invention proposes a tension type electronic fence system and its control device, which have at least one or more of the following advantages: pass detection The tension on the electronic fence changes and compares with the set value to determine the intrusion or non-invasion state, thereby reducing the misjudgment rate; when it is determined to be in the intrusion state, the voltage generating device is controlled to generate voltage pulses, thereby playing the role of active defense .

The present invention provides a control device for an electronic fence, including: a first device for generating a tension signal and a control signal based on the tension signal and a second device for receiving the control signal and responding to The control signal controls the output of the voltage.

Since the second device controls the output of the voltage in response to the control signal, the electronic fence of the present invention can use high voltage to deter and invade the intruder when it encounters an intrusion, and play a role of active defense, while avoiding the energy brought by the continuous electrification of the grid loss.

The first device of the control device of the present invention includes: a tension detector for detecting the tension of the conductive cable and generating the tension signal based on the tension; and a controller for generating the control signal based on the tension signal .

The controller may include a microprocessor that compares the tension signal generated by the tension detector with the first predetermined value and the second predetermined value, and generates a control signal. The first predetermined value and the first predetermined value may be adjusted according to changes in the environment. Wherein, the first predetermined value is greater than the second predetermined value, the microprocessor also compares the tension signal generated by the tension detector with the third predetermined value, and generates a control signal. Wherein, the third predetermined value is smaller than the second predetermined value;

When the control signal is an intrusion signal, the microprocessor also detects the frequency of the tension signal and compares the frequency of the tension signal with the first frequency and the second frequency, and updates the frequency based on the result of the comparison A control signal, wherein the first frequency is greater than the second frequency;

When the frequency of the tension signal is greater than the first frequency or less than the second frequency, the control signal is updated as a non-intrusive signal, and when the frequency of the tension signal is less than the first frequency and greater than the first At two frequencies, the control signal is updated to a non-intrusive signal;

When the frequency of the tension signal is less than the second frequency, the microprocessor is also used to change the first predetermined value and the second predetermined value.

The present invention also provides an electronic fence system, which includes: the control device of any of the foregoing embodiments, at least one conductive cable for coupling to the first device, and at least one wire for connecting all Conducting the voltage to the at least one conductive cable; and at least one insulating device for connecting to both ends of the at least one conductive cable, respectively;

Wherein, the connection between at least one wire and at least one conductive cable may be such that at least one conductive cable is separately connected to the control device; or two of the at least one conductive cable may be connected to the control device, and The remaining wires form a jumper between the remaining conductive cables; it can also be any other suitable connection method, the purpose of which can be to generate a voltage difference between each conductive cable and ground in an intrusive state. Or in the intrusive state, a voltage difference is generated between adjacent conductive cables.

BRIEF DESCRIPTION

In order to more clearly explain the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. Those of ordinary skill in the art can obtain other drawings based on these drawings without creative efforts.

FIG. 1 shows a schematic structural diagram of a control device for an electronic fence according to an embodiment of the present invention;

FIG. 2 shows a specific embodiment of the control device shown in FIG. 1;

FIG. 3 shows another specific embodiment of the control device shown in FIG. 1;

FIG. 4 shows another specific embodiment of the control device shown in FIG. 1;

5 shows a system schematic diagram of an electronic fence system according to an embodiment of the present invention;

FIG. 6 shows a variation of the electronic fence system shown in FIG. 5;

7 shows a system schematic diagram of an electronic fence system according to another embodiment of the present invention,

Among them, the same or similar reference signs indicate the same or similar step features/devices (modules)

detailed description

In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not intended to limit the present invention.

The present invention will be described in detail below with reference to the drawings.

FIG. 1 shows a schematic structural diagram of a control device for an electronic fence according to an embodiment of the present invention. The control device 100 shown in FIG. 1 includes a first device 101 and a second device 102. Among them, the first device 101 is used to generate a tension signal and a control signal based on the tension signal; the second device 102 is used to receive the control signal and control the voltage output in response to the control signal.

The tension signal is related to the magnitude of the tension on the conductive cable coupled to the first device 101 or the change in the magnitude of the tension. In one example, the conductive cable is mechanically connected to a cantilever beam fixed in the first device, and the change in tension on the conductive cable causes the cantilever beam to bend, thereby changing the resistance of the strain gauge attached to the cantilever beam. The magnitude of the resistance or the change in the resistance, that is, the tension signal, the tension signal reflects the change in the magnitude of the tension or the magnitude of the tension on the conductive cable coupled to the first device 101.

It should be noted that one of the purposes of this embodiment is to determine whether the electronic fence is invaded by detecting the amount or change of tension on the conductive cable, rather than converting the amount or change of tension on the conductive cable into a tension signal For the specific implementation of the method, any suitable method other than the above-mentioned method for achieving the tension detection through the cantilever beam can be used in this embodiment.

Based on the tension signal, the first device 101 further generates a control signal for controlling the voltage output of the second device 102. As shown in FIG. 1, the second device 102 is coupled to the first device 101 and receives control signals from the first device 101. When the electronic fence used by the control device is in a non-intrusive state, the second device 102 does not generate a pulse voltage; when the electronic fence used by the control device is in an intrusive state, the second device 102 generates a pulse voltage to deter and force back Intruder. Because whether the second device 102 generates a pulsed voltage depends on the control signal it receives, compared with the conventional pulsed electronic fence, the energy consumption of the electronic fence using the control device 100 according to an embodiment of the present invention is lower.

The structure and principle of the control device 100 according to an embodiment of the present invention have been described above. The control device 100 shown in FIG. 1 may include various implementations, and the control device 100 will be described below in conjunction with FIGS. 2, 3, and 4. Specific examples.

FIG. 2 shows a specific embodiment of the control device 100 shown in FIG. 1. In this embodiment, the first device 101 includes a tension detector 201 and a controller 202, and the tension detector 201 and the controller 202 respectively generate a tension signal and a control signal.

In one example, the controller 202 includes a microprocessor that realizes the function of comparing the tension signal generated by the tension detector 201 with the first predetermined value and the second predetermined value, and generates a control signal based on the result of the comparison. The setting of the first predetermined value and the second predetermined value makes the comparison between the tension signal caused by the touch of the electronic fence such as flying birds and branches with the first predetermined value and the second predetermined value is that the control signal is a non-intrusive signal, When there is a situation of artificial tension, climbing, or relaxation of the electronic fence, the comparison result of the tension signal with the first predetermined value and the second predetermined value is that the control signal is an intrusion signal. The first predetermined value is greater than the second predetermined value.

In this example, when the tension signal is greater than the first predetermined value or less than the second predetermined value, the control signal generated by the controller 202 is an intrusion signal, which controls the second device 102 to generate a voltage; when the tension signal is less than the first predetermined value and When it is greater than the second predetermined value, the control signal generated by the controller 202 is a non-intrusive signal, and the second device 102 has no voltage output.

In another example, the microprocessor included in the controller 202 also implements a function of comparing the tension signal generated by the tension detector 201 with a third predetermined value, and generates a control signal based on the result of the comparison. The third predetermined value is lower than the second predetermined value. The setting of the third predetermined value makes the tension of the electronic fence suddenly decrease greatly, for example, when the cable of the electronic fence is artificially cut off, the result of comparing the tension signal with the third predetermined value is that the control signal is an intrusion signal, and the controller 202 controls the second device 102 to generate a voltage. If the result of the microprocessor comparison is that the tension signal is lower than the third predetermined value, the control signal is an intrusion signal, and the controller 202 controls the second device 102 to generate a voltage; if the result of the microprocessor comparison is that the tension signal is higher than the third Three predetermined values, the microprocessor further compares the tension signal with the first and second predetermined values. Specifically, if the microprocessor further compares the result that the tension signal is greater than the first predetermined value or the tension signal is less than the second predetermined value, control The signal is an intrusion signal, and the controller 202 controls the second device 102 to generate a voltage. If the result of the further comparison by the microprocessor is that the tension signal is greater than the second predetermined value and less than the first predetermined value, the control signal is the non-intrusion signal, and the second device 102 No voltage output.

In another example, when the control signal is an intrusion signal, the microprocessor included in the controller 202 is also used to detect the frequency of the tension signal, and is used to compare the frequency of the tension signal with the first frequency and the second frequency, and based on The result of the comparison updates the control signal, where the first frequency is greater than the second frequency. Specifically, when the frequency of the tension signal is greater than the first frequency, for example, when the electronic fence is momentarily impacted, the control signal is updated to a non-intrusive signal, and the second device 102 has no voltage output; the frequency of the tension signal is less than the second frequency When the cable tension changes due to environmental changes, the control signal is also updated to a non-intrusive signal, and the second device 102 has no voltage output; only when the frequency of the tension signal is greater than the second frequency and less than the first frequency, the control signal Only after updating to the intrusion signal, the controller 202 controls the second device 102 to generate a voltage.

The control device according to this example is particularly suitable for an electronic fence anti-intrusion system that requires high judgment accuracy. Specifically, when the control signal is determined to be an intrusion signal by comparison with the first, second, and third predetermined values, the frequency of the tension signal is further detected and compared with the first and second frequencies, which effectively avoids The misjudgment caused by the momentary impact or environmental changes caused by the electronic fence.

It should be noted that the values of the first and second frequencies can be set according to need. For example, the first frequency is set to 30 Hz, and the second frequency is set to 0.1 Hz.

In yet another example, when the frequency of the tension signal is less than the second frequency, such as a change in cable tension caused by environmental changes, the microprocessor of the controller 202 is also used to change the first predetermined value and the second predetermined value, Therefore, it is possible to compensate, for example, the change in the tension of the fence cable due to environmental changes, which further reduces the misjudgment rate.

It should be noted that the first, second, and third predetermined values do not have to be fixed. The first, second, and third predetermined values can be adjusted according to changes in climate, environment, and other factors, for example, electronic In the case of high tension in cold weather, the cables of the fence can choose to increase the first, second, and third predetermined values. In the application place with large vibration, you can choose to increase the first, second, and third. Predetermined value.

Those of ordinary skill in the art can understand that the first, second, and third predetermined values and the first and second frequencies can be stored in a storage unit such as NAND, and can be arbitrarily set by the user according to needs. The function of comparing the tension signal with the first, second, and third predetermined values may be implemented by, for example, a comparator. It should be noted that the storage method of the first, second, and third predetermined values and the specific implementation method for comparing the tension signal with the first, second, and third predetermined values are not limiting factors of the present invention, and any suitable method may be used. Applied to this embodiment. The function of comparing the frequency of the tension signal with the first and second frequencies can be achieved, for example, by changing the frequency of the tension signal to a DC signal (F/V conversion) and then comparing with a comparator, or using a gate circuit/trigger Carry out comparison and other methods to achieve. The specific way of comparison is not a limiting factor of the invention.

Optionally, as shown in FIG. 3, the first device 101 further includes an analog-to-digital converter 301, which converts the tension signal generated by the tension detector into a digital signal, and sends the converted tension signal to The controller 202 performs processing. Those skilled in the art should understand that digital signals are easier to store and process than analog signals, and the use of digital signals can improve the accuracy of the controller 202, thereby enhancing anti-interference performance and reducing false positives. rate.

Optionally, as shown in FIG. 4, the second device 102 may include a mode selection module 401, which is used to select at least two modes: a first mode and a second mode, where the first mode and the second mode respectively correspond to different Application scenarios. For example, the first mode is used during the day. When the electronic fence is invaded, the second device 102 generates a lower voltage and the pulse strike strength is lower. The second mode is used at night or in situations where high alert is required. During the intrusion, the second device 102 generates a higher voltage, and the pulse strike strength is increased compared to the first mode. The first mode and the second mode can be switched by the user according to actual needs. Other modes than the first and second modes may be set according to actual needs.

FIG. 5 shows a system schematic diagram of an electronic fence system according to an embodiment of the present invention. As shown in FIG. 5, the electronic fence system 500 includes the control device 200 shown in FIG. 2, and a conductive cable 502 mechanically coupled to the tension detector 201 respectively, for conducting the voltage generated by the second device 102 to the conductive cable The wire 503 of 502, and the insulating device 501 respectively connected to the two ends of the conductive cable 502.

As shown in FIG. 5, when the tension on the conductive cable 502 changes, the tension detector mechanically coupled to the cable 502 generates a tension signal. When the tension signal is less than the first predetermined value and greater than the second predetermined value, for example When the bird, tree branch, etc. touches the cable 502, the control signal is a non-intrusive signal, and the second device 102 does not generate a voltage; when the tension signal is greater than the first predetermined value or less than the second predetermined value, for example, when an intruder climbs , Tension or compression, or artificially relaxing the electronic fence, the control signal is an intrusion signal, at this time the second device 102 generates a voltage, and the wire 503 conducts the voltage to the conductive cable 502; when the tension signal is less than the third predetermined value, for example When the tension of the electronic fence is greatly reduced by artificially cutting the fence cable, the control signal is an intrusion signal. At this time, the second device 102 generates a voltage, and the wire 503 conducts the voltage to the conductive cable 502; There is a voltage difference between the conductive cable 502 and the ground, and the voltage difference is set within a reasonable range, so that the intruder can be deterred and repelled without causing any physical harm to the intruder.

Fig. 5 illustrates only four conductive cables as an example. Those of ordinary skill in the art understand that the number of conductive cables can be set according to factors such as the height of the electronic fence to be set, the required degree of prevention, etc., and the corresponding number of tension detectors 201, insulating devices 501, and wires 503 With corresponding adjustments, the specific number of conductive cables is not a limiting factor of the present invention.

For example, FIG. 6 shows a modification of the electronic fence system shown in FIG. 5. In this embodiment, the wire 503 is connected across the conductive cable 502. As shown in FIG. 6, two wires 503 are respectively connected to the second device 102 and the first conductive cable 502 and the fourth conductive cable 502, and one wire 503 is connected to the first conductive cable 503 and the third conductive For the cable 503, one wire 503 connects the second conductive cable 503 and the fourth conductive cable 503. Thus, when the control signal is an intrusion signal, the second device 102 generates a voltage difference, and the result is that the first and second conductive cables, the second and third conductive cables, and the third and fourth conductive In the cable, there is a voltage difference between the first and fourth conductive cables. When an intruder climbs, pulls, or relaxes the electronic fence system 600, as long as it contacts two conductive cables with a voltage difference, it will feel an electric shock and be deterred or forced back.

It should be noted that one of the purposes of the embodiments of the present invention is to make a voltage difference between adjacent conductive cables 502 or between conductive cables 502 and ground. Any suitable wire 503 can achieve this purpose. Both connection methods can be used in the embodiments of the present invention.

7 shows a system schematic diagram of an electronic fence system according to another embodiment of the present invention. As shown in FIG. 7, the electronic fence system 700 further includes an alarm device 701 that receives a control signal from the controller 202. When the control signal is a non-intrusion signal, the alarm device 701 does not generate an alarm. When the control signal is an intrusion signal, the alarm device 701 generates an alarm.

A person of ordinary skill in the art understands that the alarm device 701 may use siren, flashing, etc. to alarm, and the alarm device may be optionally installed in a monitoring center and other places where remote monitoring of the electronic fence is required, which does not constitute a limitation of the present invention.

It should be noted that FIGS. 5-7 only illustrate the electronic fence system using the control device shown in FIG. 2 as an example. Without departing from the spirit and scope of the present invention, the control device shown in FIG. Any variation, including the control device according to any embodiment of the present invention, can be used in the electronic fence system according to the embodiment of the present invention.

Although the present invention has been illustrated and described in detail in the drawings and the foregoing description, it should be regarded as illustrative and exemplary rather than limiting; the present invention is not limited to the above-described embodiments. Those of ordinary skill in the art can understand and implement other changes to the disclosed embodiments by studying the description, the disclosure, the drawings, and the appended claims. In the claims, the word "comprising" does not exclude other elements and steps, and the word "a" does not exclude plurals. Any reference signs in the claims should not be construed as limiting the scope.

Claims (13)

1. An electronic fence system and its control equipment are characterized by comprising:

   A first device for generating a tension signal and a control signal based on the tension signal;

   A second device for receiving the control signal and controlling the output of the voltage in response to the control signal;

   Wherein, the first device includes a tension detector and a controller, the tension detector detects the tension of the wire and cable, and generates the tension signal based on the tension;

   The controller generates the control signal based on the tension signal, characterized in that the controller includes a microprocessor, when the control signal is an intrusion signal, the microprocessor detects the frequency of the tension signal, and The frequency of the tension signal is compared with the first frequency and the second frequency, and the control signal is updated based on the result of the comparison, wherein the first frequency is greater than the second frequency.
2. The control device according to claim 1, wherein the microprocessor compares the tension signal with a first predetermined value and a second predetermined value, and generates the control signal based on the result of the comparison, wherein the first A predetermined value is greater than the second predetermined value.
3. The control device according to claim 2, wherein when the tension signal is greater than the first predetermined value or less than the second predetermined value, the control signal is an intrusion signal, and when the tension signal is less than When the first predetermined value is greater than the second predetermined value, the control signal is a non-intrusive signal.
4. The control device according to any one of claims 1 or 2, wherein the microprocessor is further used to compare the tension signal with a third predetermined value, and generate the control signal based on the result of the comparison, wherein The third predetermined value is smaller than the second predetermined value.
5. The control device according to claim 4, characterized in that

   When the tension signal is less than the third predetermined value, the control signal is an intrusion signal;

   When the tension signal is greater than the third predetermined value and less than the second predetermined value, or when the tension signal is greater than the first predetermined value, the control signal is an intrusion signal;

   When the tension signal is less than the first predetermined value and greater than the second predetermined value, the control signal is a non-intrusion signal.
6. The control device according to claim 1, characterized in that

   When the frequency of the tension signal is greater than the first frequency or less than the second frequency, the control signal is updated to a non-intrusive signal,

   When the frequency of the tension signal is less than the first frequency and greater than the second frequency, the control signal is updated as an intrusion signal.
7. The control device according to claim 2, wherein when the frequency of the tension signal is less than the second frequency, the microprocessor is further used to change the first predetermined value and the second predetermined value.
8. The control device according to claim 1, wherein the first device further includes an analog-to-digital converter, coupled to the tension detector and the controller, for converting the tension signal into a A digital signal, and used to transmit the first digital signal to the controller to generate the control signal.
9. The control device according to claim 1, wherein the second device includes a mode selection module for selecting at least a first mode and a second mode, in which the second device is based on The control signal controls the output of the first voltage, and in the second mode, the second device controls the output of the second voltage based on the control signal.
10. An electronic fence system, including:

    The control device according to any one of claims 1 to 9;

    At least one conductive cable for coupling to the first device:

    At least one wire for conducting the voltage to the at least one conductive cable;

    At least one insulating device for respectively connecting to both ends of the at least one conductive cable.
11. The electronic fence system of claim 10, wherein the at least one wire is used to make the first group and the second group of the at least one conductive cable have different potentials.
12. The electronic fence system according to claim 11, wherein the at least one conductive cable is arranged from top to bottom, and two of the at least one conductive wire are respectively connected to the at least one conductive cable One at the uppermost end and one at the lowermost end, the first group of the remaining wires in the at least one wire is connected to the odd-numbered rows of the conductive cable, and the second group of the remaining wires in the at least one wire is connected to the conductive Even-numbered rows of cables.
13. The electronic fence system of claim 10, further comprising:

    The alarm device is for receiving the control signal and for controlling the output of the alarm signal based on the control signal.

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