CN106162546A - A kind of monitoring method based on trailing type virtual fence, Apparatus and system - Google Patents

Abstract

The present invention provides a monitoring method, device and system based on a follow-up virtual fence, wherein the monitoring method includes: separately acquiring the first position information sent by the monitoring terminal carried on the monitored object, and monitoring the monitored object The second position information sent by the positioning terminal; according to the first position information and the second position information, it is judged whether the monitoring terminal exceeds the preset virtual fence area associated with the positioning terminal, wherein the virtual fence area can follow the movement of the positioning terminal; if the monitoring When the terminal exceeds the preset virtual fence area associated with the positioning terminal, an alarm message is generated and sent to a designated user terminal. The solution of the invention enables the monitored object to move arbitrarily within the virtual fence area following the positioning terminal.

Description

A monitoring method, device and system based on follow-up virtual fence

technical field

The invention relates to the field of communication technology, in particular to a monitoring method, device and system based on a follow-up virtual fence.

Background technique

At present, with the wide application of positioning technology, the virtual fence function derived from it has been popularized. This function is to install a monitoring terminal for the monitored object, perform logical judgment processing based on real-time geographic location information and the predetermined fence boundary, trigger a predefined event, and issue a corresponding cross-border alarm message to construct a set of invisible The perimeter anti-theft alarm system achieves a more accurate security monitoring effect. However, there are at least the following defects in the implementation method of the existing virtual fence:

First, the accuracy of the alarm depends entirely on the two factors of real-time positioning information and the accuracy of boundary range delineation. For positioning information, even if multiple methods of hybrid positioning (such as satellite + base station dual positioning) are used, there is still a deviation of about 5-10m, and it cannot be applied at all in areas where satellite positioning cannot be performed, such as indoors. There are currently two ways to delineate the boundary range. One is to manually delineate on the map on the platform side. Unavoidably, it will have adverse effects on accuracy; the other is to use the satellite positioning information obtained by the positioning terminal itself as the center of the circle, and a circular area with a certain distance as the radius as the boundary range, but the error of the positioning information itself will affect the final accuracy.

Second, the boundaries mentioned above are all fixed-point areas, but the security boundaries of many application scenarios are constantly moving (for example, the owner goes out to walk the dog, logistics vehicles transport goods, etc.), and the fixed-point security boundary area obviously cannot meet this requirement. class application requirements.

Contents of the invention

The purpose of the embodiments of the present invention is to provide a monitoring method, device and system based on a follow-up virtual fence, which can enable the monitored object to follow the positioning terminal to move arbitrarily in the virtual fence area, and at the same time ensure that the alarm is effective in real time and control False alarm rate.

In order to achieve the above object, an embodiment of the present invention provides a monitoring method based on a follow-up virtual fence, which is applied to a cloud server. The monitoring method includes:

Respectively acquiring the first location information sent by the monitoring terminal carried on the monitored object, and the second location information sent by the positioning terminal used to monitor the monitored object;

According to the first location information and the second location information, it is judged whether the monitoring terminal exceeds a preset virtual fence area associated with the positioning terminal, wherein the virtual fence area can follow the positioning terminal to move;

If the monitoring terminal exceeds the preset virtual fence area associated with the positioning terminal, an alarm message is generated and sent to a designated user terminal.

Wherein, the virtual fence area is an area with the positioning terminal as the center and a preset threshold as the radius.

Wherein, the first location information includes first satellite positioning location information and first WIFI location information, and the second location information includes second satellite positioning location information and second WIFI location information,

According to the first location information and the second location information, it is judged whether the monitoring terminal exceeds the preset virtual fence area associated with the positioning terminal, specifically including:

Determine the first distance value between the monitoring terminal and the positioning terminal according to the first satellite positioning position information and the second satellite positioning position information;

If the first distance value exceeds a preset threshold, it is judged whether the preset threshold is greater than a limit value, wherein the limit value refers to the effective distance of the short-distance wireless communication adopted by the monitoring terminal;

If the preset threshold is greater than the limit value, according to the first WIFI location information and the second WIFI location information, it is judged whether the monitoring terminal and the positioning terminal have searched for the same WIFI signal source, and the first judgment result is obtained;

If the first judgment result is that the monitoring terminal and the positioning terminal do not search for the same WIFI signal source, it is determined that the monitoring terminal exceeds the virtual fence area;

If the first judgment result is that the monitoring terminal and the positioning terminal have searched for the same WIFI signal source, it is determined that the monitoring terminal is within the virtual fence area.

Wherein, the first location information also includes the location information of the first base station, and the second location information also includes the location information of the second base station;

Correspondingly, if the preset threshold is greater than the limit value, the monitoring method also includes:

According to the positioning position information of the first base station and the positioning position information of the second base station, it is judged whether the monitoring terminal and the positioning terminal are within the coverage of the same base station, and a second judgment result is obtained;

If the second judgment result is that the monitoring terminal and the positioning terminal are in different base station coverage areas, enter the step of judging whether the monitoring terminal and the positioning terminal have searched for the same WIFI signal source according to the first WIFI location information and the second WIFI location information ;

If the second determination result is that the monitoring terminal and the positioning terminal are within the coverage of the same base station, it is determined that the monitoring terminal is within the virtual fence area.

Embodiments of the present invention also provide a monitoring device based on a follow-up virtual fence, which is applied to a cloud server, and the monitoring device includes:

An acquisition module, configured to respectively acquire the first location information sent by the monitoring terminal carried on the monitored object, and the second location information sent by the positioning terminal used to monitor the monitored object;

The judging module is used to judge whether the monitoring terminal exceeds the preset virtual fence area associated with the positioning terminal according to the first location information and the second location information, and if the monitoring terminal exceeds the preset virtual fence area associated with the positioning terminal , triggering the alarm module, wherein the virtual fence area can follow the movement of the positioning terminal;

The alarm module is configured to generate alarm information according to the trigger of the judging module, and send the alarm information to a designated user terminal.

Wherein, the virtual fence area is an area with the positioning terminal as the center and a preset threshold as the radius.

Wherein, the first location information includes the first satellite positioning location information and the first WIFI location information, the second location information includes the second satellite positioning location information and the second WIFI location information, and the judging module includes:

The first determination unit is configured to determine a first distance value between the monitoring terminal and the positioning terminal according to the first satellite positioning position information and the second satellite positioning position information;

The first judgment unit is used to judge whether the preset threshold is greater than the limit value if the first distance value exceeds the preset threshold value, and trigger the second judgment unit if the preset threshold value is greater than the limit value, wherein the limit value refers to the monitoring terminal The effective range of the short-range wireless communication adopted;

The second judging unit is used to judge whether the monitoring terminal and the positioning terminal have searched for the same WIFI signal source according to the triggering of the first judging unit and according to the first WIFI location information and the second WIFI location information, and obtain the first judging result;

The second determining unit is used to determine that the monitoring terminal exceeds the virtual fence area if the first judgment result is that the monitoring terminal and the positioning terminal do not search for the same WIFI signal source;

The third determining unit is configured to determine that the monitoring terminal is within the virtual fence area if the first judgment result is that the monitoring terminal and the positioning terminal have searched for the same WIFI signal source.

Wherein, the first location information also includes the location information of the first base station, and the second location information also includes the location information of the second base station,

Correspondingly, if the preset threshold is greater than the limit value, the judging module also includes:

The third judging unit is configured to judge whether the monitoring terminal and the positioning terminal are within the coverage of the same base station according to the location information of the first base station and the location information of the second base station, and obtain a second judgment result;

The fourth judging unit is used to make the second judging unit judge the monitoring terminal and the positioning terminal according to the first WIFI location information and the second WIFI location information if the second judging result is that the monitoring terminal and the positioning terminal are in different base station coverage areas. The step of locating whether the terminal searches for the same WIFI signal source;

The fourth determining unit is configured to determine that the monitoring terminal is within the virtual fence area if the second determination result is that the monitoring terminal and the positioning terminal are within the coverage of the same base station.

An embodiment of the present invention also provides a cloud server, including the monitoring device based on the following virtual fence.

An embodiment of the present invention also provides a follow-up virtual fence-based monitoring system, including a monitoring terminal, a positioning terminal, and the above-mentioned cloud server.

Among them, the monitoring terminal is connected with the positioning terminal through short-distance wireless communication. If the connection is successfully established, it is determined that the monitoring terminal is in the preset virtual fence area associated with the positioning terminal; if the connection fails to be established, the monitoring terminal sends to the cloud server. The first location information; the positioning terminal sends the second location information to the cloud server.

Above-mentioned scheme of the present invention comprises following beneficial effect at least:

In the embodiment of the present invention, since the virtual fence area can follow the movement of the positioning terminal, when the positioning terminal moves, the cloud server can base on the moved virtual fence area, the first position information sent by the monitoring terminal, and the first position information sent by the positioning terminal. The second location information is used to judge whether the monitoring terminal exceeds the above-mentioned virtual fence area, and when the monitoring terminal exceeds the above-mentioned virtual fence area, send an alarm message to the designated user terminal, so that the monitored object carrying the above-mentioned monitoring terminal can be associated with the positioning terminal Move freely within the virtual fence area. In addition, because the cloud server adopts various judgment conditions such as satellite positioning and WIFI positioning, it can control the false alarm rate while ensuring real-time and effective alarms.

Description of drawings

Fig. 1 is the flow chart of the monitoring method based on following type virtual fence in the embodiment of the present invention;

Fig. 2 is the specific flowchart of step 12 in Fig. 1 in the embodiment of the present invention;

Fig. 3 is a flow chart of the short-distance wireless communication between the monitoring terminal and the positioning terminal and the cloud server judging whether the monitoring terminal exceeds the virtual fence area in the embodiment of the present invention;

4 is a schematic diagram of a monitoring device based on a follow-up virtual fence in an embodiment of the present invention;

Fig. 5 is a schematic diagram of a monitoring system based on a follow-up virtual fence in an embodiment of the present invention.

detailed description

In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following will describe in detail with reference to the drawings and specific embodiments.

Aiming at the problem that the fixed-point area in the virtual fence area in the prior art cannot satisfy the continuous movement of the positioning terminal, the present invention provides a monitoring method, device and system based on a follow-up virtual fence, which enables the monitored object to follow the positioning terminal in the Move freely within the virtual fence area.

As shown in Figure 1, the embodiment of the present invention provides a monitoring method based on a follow-up virtual fence, which is applied to a cloud server, and the monitoring method includes:

Step 11, acquiring first location information sent by a monitoring terminal carried on the monitored object and second location information sent by a positioning terminal used to monitor the monitored object.

The first location information includes at least first satellite positioning location information and first WIFI location information, and the second location information includes at least second satellite positioning location information and second WIFI location information.

In a specific embodiment of the present invention, the monitoring terminal needs to have satellite positioning (including but not limited to GPS, Beidou satellite navigation system, etc.) functions and wide-area wireless communication (including but not limited to 2G, 3G, 4G) functions. Optionally, the above-mentioned monitoring terminal may also have short-distance wireless communication functions such as WIFI function, Bluetooth, and low-power local area network protocol (Zigbee). According to different application scenarios, the positioning terminal can be the user's smart phone (such as the mobile phone of the pet owner in the above scene, the mobile phone of the truck driver, etc.), or the same or similar terminal as the monitoring terminal carried by the monitored object.

Step 12: According to the first location information and the second location information, it is judged whether the monitoring terminal exceeds the preset virtual fence area associated with the positioning terminal, wherein the virtual fence area can follow the movement of the positioning terminal.

Wherein, in the above embodiments of the present invention, the virtual fence area is an area with the positioning terminal as the center and a preset threshold as the radius. Therefore, when the positioning terminal moves, the virtual fence area also moves with it. Wherein, the preset threshold can be set according to actual needs.

Step 13, if the monitoring terminal exceeds the preset virtual fence area associated with the positioning terminal, generate an alarm message and send the alarm message to a designated user terminal.

In a specific embodiment of the present invention, the designated user terminal may or may not be a positioning terminal, as long as the designated user terminal can remind the user that the object it monitors exceeds the preset virtual fence area.

In a specific embodiment of the present invention, since the virtual fence area can follow the movement of the positioning terminal, when the positioning terminal moves, the cloud server can base on the moved virtual fence area, the first location information sent by the monitoring terminal, and the location information sent by the positioning terminal. to determine whether the monitoring terminal exceeds the above-mentioned virtual fence area, and when the monitoring terminal exceeds the above-mentioned virtual fence area, send an alarm message to the designated user terminal. Thus, the monitored object carrying the monitoring terminal can move arbitrarily within the virtual fence area associated with the positioning terminal. It can be seen that the judgment of whether the monitoring terminal exceeds the virtual fence area is all completed on the cloud server, which requires low computing power for the monitoring terminal and positioning terminal, and is very suitable for IoT terminals.

Based on the application scenario where the owner goes out to walk the dog, the above monitoring method is further described. Specifically, in this application scenario, the positioning terminal may be the mobile phone of the owner, and the monitoring terminal may be a locator carried by the dog. When the owner is walking the dog in area A, the cloud server will set a virtual fence area for the locator (that is, the dog) with the owner's mobile phone as the center and the preset threshold (for example, 10m) as the radius. When the distance between the dog and the owner exceeds 10m Finally, the cloud server will send an alarm message to the designated user terminal, so that the dog can move freely within 10m from the owner. Similarly, when the owner moves to area B to walk the dog, the cloud server will set a virtual fence area for the locator (that is, the dog) with a preset threshold (for example, 10m) as the radius with the mobile phone of the moved owner as the center, so that The dog can move freely within 10m from the owner. It can be seen from this that the above cloud server can set a follow-up virtual fence area for the monitored object (such as a dog).

Wherein, as shown in FIG. 2, in the above-mentioned embodiment of the present invention, when the first location information includes the first satellite positioning location information and the first WIFI location information, the second location information includes the second satellite positioning location information and the second WIFI location information, the specific steps of the above step 12 are:

Step 21: Determine a first distance value between the monitoring terminal and the positioning terminal according to the first satellite positioning position information and the second satellite positioning position information.

Step 22, if the first distance value exceeds a preset threshold, determine whether the preset threshold is greater than a limit value, where the limit value refers to the effective distance of the short-distance wireless communication adopted by the monitoring terminal.

Step 23, if the preset threshold is greater than the limit value, according to the first WIFI location information and the second WIFI location information, judge whether the monitoring terminal and the positioning terminal have searched for the same WIFI signal source, and obtain a first judgment result.

Step 24, if the first judgment result is that the monitoring terminal and the positioning terminal do not find the same WIFI signal source, it is determined that the monitoring terminal is beyond the virtual fence area.

Step 25, if the first judgment result is that the monitoring terminal and the positioning terminal have searched for the same WIFI signal source, it is determined that the monitoring terminal is within the virtual fence area.

In a specific embodiment of the present invention, in order to overcome areas where satellite positioning cannot be performed indoors, etc., in the judgment of whether the monitoring terminal exceeds the virtual fence area, the first WIFI position information of the monitoring terminal and the first WIFI position information of the positioning terminal are added. 2. WIFI location information. Of course, this can also reduce the false positive rate as much as possible.

The specific judgment process is as follows: first, it is necessary to ensure that the monitoring terminal has valid first satellite positioning position information, and the positioning terminal has valid second satellite positioning position information; then according to the first satellite positioning position information and the second satellite positioning position information Determine the first distance value between the monitoring terminal and the positioning terminal. When the first distance value exceeds the preset threshold, further judge whether the preset threshold exceeds the limit value. If the preset threshold is less than the limit value, no subsequent judgment is required (That is, it is considered that the monitoring terminal is in the virtual fence area), if the preset threshold is greater than the limit value, it is necessary to further judge whether the monitoring terminal and the positioning terminal have searched for the same WIFI signal according to the first WIFI location information and the second WIFI location information source, to obtain the first judgment result; and if the first judgment result is that the monitoring terminal and the positioning terminal do not search for the same WIFI signal source, it is determined that the monitoring terminal exceeds the virtual fence area; if the first judgment result is that the monitoring terminal and the positioning terminal search When reaching the same WIFI signal source, make sure that the monitoring terminal is within the virtual fence area.

Wherein, in the above-mentioned embodiments of the present invention, in order to further reduce the false alarm rate, the location information of the base station may also be added when judging whether the monitoring terminal exceeds the virtual fence area. That is, according to the first position information of the monitoring terminal (the first position information includes the first satellite positioning position information, the first base station positioning position information and the first WIFI position information) and the second position information of the positioning terminal (the second position The information includes the second satellite positioning position information, the second base station positioning position information and the second WIFI position information) to determine whether the monitoring terminal exceeds the virtual fence area.

The specific steps are: when the above-mentioned step 22 judges that if the preset threshold is greater than the limit value, according to the first base station location information and the second base station location information, it is judged whether the monitoring terminal and the positioning terminal are within the coverage of the same base station, Obtain the second judgment result; if the second judgment result is that the monitoring terminal and the positioning terminal are in different base station coverage areas, enter according to the first WIFI location information and the second WIFI location information to judge whether the monitoring terminal and the positioning terminal have searched for the same The step of the WIFI signal source; if the second judgment result is that the monitoring terminal and the positioning terminal are within the coverage of the same base station, it is determined that the monitoring terminal is within the virtual fence area.

In a specific embodiment of the present invention, for the judgment of whether the monitoring terminal exceeds the virtual fence area, when the satellite positioning, base station positioning and WIFI positioning data are all complete, and the preset threshold value is greater than the limit value, the satellite positioning, base station positioning and WIFI positioning data are used. There are three judgment conditions for the signal source. Only when the satellite positioning position of the monitoring terminal and the positioning terminal exceeds the preset threshold, and are not in the same base station and cannot search for the same WIFI signal source, can the monitoring terminal be judged to be beyond the virtual fence area , generate alarm information, and send the alarm information to the specified user terminal, thereby minimizing the probability of false alarms.

Wherein, as shown in FIG. 3, in the above-mentioned embodiment of the present invention, before the monitoring terminal sends the first location information to the cloud server, it can connect with the positioning terminal through short-distance wireless communication. If the connection is successfully established, then Make sure that the monitoring terminal is in the preset virtual fence area associated with the positioning terminal; if the connection establishment fails, the monitoring terminal sends the first location information to the cloud server; the positioning terminal sends the second location information to the cloud server, so that the cloud server can monitor Judgment whether the terminal exceeds the virtual fence area. Specific steps include:

Step 300, enabling the follow-up virtual fence alarm function;

Step 301, initiate a connection to the positioning terminal through short-distance wireless communication;

Step 302, judging whether the connection is established successfully, if so, then execute step 303, otherwise, execute step 305;

Step 303, determining that the monitoring terminal is in the virtual fence area;

Step 304, judging whether the connection is disconnected, if disconnected, execute step 305, otherwise, execute step 303;

Step 305, the positioning terminal and the positioning terminal send location information;

Step 306, the cloud server obtains the location information of the monitoring terminal and the positioning terminal;

Step 307, judging whether the monitoring terminal and the positioning terminal both have satellite positioning information, if so, perform step 308, otherwise, perform step 306;

Step 308, judging the distance between the monitoring terminal and the positioning terminal;

Step 309, judging whether the distance between the positions exceeds a preset threshold, if so, execute step 311, otherwise, execute step 310;

Step 310, determining that the monitoring terminal is in the virtual fence area;

Step 311, judging whether the preset threshold is less than the limit value, if so, execute step 310, otherwise, execute step 312;

Step 312, judging whether the monitoring terminal and the positioning terminal both have base station positioning information, if so, perform step 313, otherwise perform step 314;

Step 313, judging whether the monitoring terminal and the positioning terminal are in the same base station, if so, perform step 310, otherwise, perform step 314;

Step 314, judging whether the monitoring terminal and the positioning terminal both have WIFI positioning information, if so, perform step 315, otherwise, perform step 316;

Step 315, judging whether the monitoring terminal and the positioning terminal have searched for the same WIFI signal source, if so, perform step 310, otherwise, perform step 316;

In step 316, it is determined that the monitoring terminal is beyond the range of the virtual fence.

In a specific embodiment of the present invention, after the monitoring terminal turns on the follow-up virtual fence alarm function, it connects with the positioning terminal through a short-distance wireless communication method (such as Bluetooth, Zigbee, etc.), and successfully establishing a connection means that the monitoring terminal is in the virtual fence area. If the connection fails to be established or is disconnected after the connection is established, the cloud server starts to judge whether the monitoring terminal exceeds the virtual fence area. Of course, if the monitoring terminal only has satellite positioning and wide area wireless communication functions. If you do not have any short-distance wireless communication function, you can skip this part of the judgment process, and directly proceed to the judgment process of whether the monitoring terminal exceeds the virtual fence area (the specific judgment process has been described in detail in the above monitoring method, and will not be repeated here) . The judging conditions for the establishment and disconnection of the communication connection between the monitoring terminal and the positioning terminal are used as a means of pre-judgment. Without adding additional burdens, the overhead for judging whether the monitoring terminal exceeds the virtual fence area is reduced, and the improvement is improved. The accuracy and pertinence are ensured; at the same time, this part of the judgment is realized by the monitoring terminal itself, and no additional overhead will be added.

As shown in Figure 4, the embodiment of the present invention also provides a monitoring device based on a follow-up virtual fence, which is applied to a cloud server, and the monitoring device includes:

An acquisition module 41, configured to respectively acquire the first location information sent by the monitoring terminal carried on the monitored object, and the second location information sent by the positioning terminal used to monitor the monitored object;

Judging module 42, for judging whether the monitoring terminal exceeds the preset virtual fence area associated with the positioning terminal according to the first location information and the second location information, and if the monitoring terminal exceeds the preset virtual fence area associated with the positioning terminal , trigger the alarm module 43, wherein the virtual fence area can follow the positioning terminal to move;

The alarm module 43 is configured to generate alarm information according to the trigger of the judging module 42, and send the alarm information to a specified user terminal.

Wherein, the virtual fence area is an area with the positioning terminal as the center and a preset threshold as the radius.

Wherein, the first location information includes the first satellite positioning location information and the first WIFI location information, the second location information includes the second satellite positioning location information and the second WIFI location information, and the judging module 42 includes:

The first determination unit is configured to determine a first distance value between the monitoring terminal and the positioning terminal according to the first satellite positioning position information and the second satellite positioning position information;

The first judgment unit is used to judge whether the preset threshold is greater than the limit value if the first distance value exceeds the preset threshold value, and trigger the second judgment unit if the preset threshold value is greater than the limit value, wherein the limit value refers to the monitoring terminal The effective range of the short-range wireless communication adopted;

The second judging unit is used to judge whether the monitoring terminal and the positioning terminal have searched for the same WIFI signal source according to the triggering of the first judging unit and according to the first WIFI location information and the second WIFI location information, and obtain the first judging result;

The second determining unit is used to determine that the monitoring terminal exceeds the virtual fence area if the first judgment result is that the monitoring terminal and the positioning terminal do not search for the same WIFI signal source;

The third determining unit is configured to determine that the monitoring terminal is within the virtual fence area if the first judgment result is that the monitoring terminal and the positioning terminal have searched for the same WIFI signal source.

Wherein, the first location information also includes the location information of the first base station, and the second location information also includes the location information of the second base station,

Correspondingly, if the preset threshold is greater than the limit value, the judging module 42 also includes:

The third judging unit is configured to judge whether the monitoring terminal and the positioning terminal are within the coverage of the same base station according to the location information of the first base station and the location information of the second base station, and obtain a second judgment result;

The fourth judging unit is used to make the second judging unit judge the monitoring terminal and the positioning terminal according to the first WIFI location information and the second WIFI location information if the second judging result is that the monitoring terminal and the positioning terminal are in different base station coverage areas. The step of locating whether the terminal searches for the same WIFI signal source;

The fourth determining unit is configured to determine that the monitoring terminal is within the virtual fence area if the second determination result is that the monitoring terminal and the positioning terminal are within the coverage of the same base station.

It should be noted that the follow-up virtual fence-based monitoring device provided by the embodiment of the present invention is a device applying the above method, that is, all embodiments of the above method are applicable to the device, and can achieve the same or similar beneficial effects.

An embodiment of the present invention also provides a cloud server, including the monitoring device based on the following virtual fence.

As shown in FIG. 5 , the embodiment of the present invention also provides a follow-up virtual fence-based monitoring system, including a monitoring terminal, a positioning terminal, and the above-mentioned cloud server.

Among them, the monitoring terminal is connected with the positioning terminal through short-distance wireless communication. If the connection is successfully established, it is determined that the monitoring terminal is in the preset virtual fence area associated with the positioning terminal; if the connection fails to be established, the monitoring terminal sends to the cloud server. The first location information; the positioning terminal sends the second location information to the cloud server.

The above description is a preferred embodiment of the present invention, it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, some improvements and modifications can also be made, and these improvements and modifications can also be made. It should be regarded as the protection scope of the present invention.

Claims (11)

1. A monitoring method based on following type virtual fence, applied to cloud server, it is characterized in that, described monitoring method comprises: Respectively acquire the first location information sent by the monitoring terminal carried on the monitored object, and the second location information sent by the positioning terminal used to monitor the monitored object; According to the first location information and the second location information, it is judged whether the monitoring terminal exceeds a preset virtual fence area associated with the positioning terminal, wherein the virtual fence area can follow the movement of the positioning terminal; If the monitoring terminal exceeds the preset virtual fence area associated with the positioning terminal, an alarm message is generated and sent to a specified user terminal. 2. The monitoring method according to claim 1, wherein the virtual fence area is an area with the positioning terminal as the center and a preset threshold as the radius. 3. The monitoring method according to claim 1, wherein the first position information comprises the first satellite positioning position information and the first WIFI position information, and the second position information comprises the second satellite positioning position information and Second WIFI location information, The judging whether the monitoring terminal exceeds the preset virtual fence area associated with the positioning terminal according to the first location information and the second location information specifically includes: determining a first distance value between the monitoring terminal and the positioning terminal according to the first satellite positioning position information and the second satellite positioning position information; If the first distance value exceeds a preset threshold, it is judged whether the preset threshold is greater than a limit value, wherein the limit value refers to the effective distance of the short-distance wireless communication adopted by the monitoring terminal; If the preset threshold is greater than the limit value, according to the first WIFI location information and the second WIFI location information, it is judged whether the monitoring terminal and the positioning terminal have searched for the same WIFI signal source, and a first judgment result is obtained. ; If the first judgment result is that the monitoring terminal and the positioning terminal do not find the same WIFI signal source, it is determined that the monitoring terminal exceeds the virtual fence area; If the first judgment result is that the monitoring terminal and the positioning terminal have searched for the same WIFI signal source, it is determined that the monitoring terminal is within the virtual fence area. 4. The monitoring method according to claim 3, wherein the first location information also includes first base station location information, and the second location information also includes second base station location information; Correspondingly, if the preset threshold is greater than the limit value, the monitoring method further includes: According to the location information of the first base station and the location information of the second base station, it is judged whether the monitoring terminal and the positioning terminal are within the coverage of the same base station, and a second judgment result is obtained; If the second judgment result is that the monitoring terminal and the positioning terminal are within the coverage of different base stations, proceed to judge whether the monitoring terminal and the positioning terminal are searching according to the first WIFI location information and the second WIFI location information. Steps to the same WIFI signal source; If the second determination result is that the monitoring terminal and the positioning terminal are within the coverage of the same base station, it is determined that the monitoring terminal is within the virtual fence area. 5. A monitoring device based on a follow-up virtual fence, applied to a cloud server, characterized in that the monitoring device includes: An acquisition module, configured to separately acquire the first location information sent by the monitoring terminal carried on the monitored object, and the second location information sent by the positioning terminal used to monitor the monitored object; A judging module, configured to judge whether the monitoring terminal exceeds the preset virtual fence area associated with the positioning terminal according to the first location information and the second location information, and if the monitoring terminal exceeds the preset virtual fence area associated with the positioning terminal When locating the virtual fence area associated with the terminal, an alarm module is triggered, wherein the virtual fence area can follow the movement of the positioning terminal; An alarm module, configured to generate alarm information according to the trigger of the judging module, and send the alarm information to a designated user terminal. 6. The monitoring device according to claim 5, wherein the virtual fence area is an area with the positioning terminal as the center and a preset threshold as the radius. 7. The monitoring device according to claim 5, wherein the first position information comprises the first satellite positioning position information and the first WIFI position information, and the second position information comprises the second satellite positioning position information and The second WIFI location information, the judgment module includes: A first determining unit, configured to determine a first distance value between the monitoring terminal and the positioning terminal according to the first satellite positioning position information and the second satellite positioning position information; A first judging unit, configured to judge whether the preset threshold is greater than a limit value if the first distance value exceeds a preset threshold, and trigger a second judging unit if the preset threshold is greater than the limit value , wherein the limit value refers to the effective distance of the short-distance wireless communication adopted by the monitoring terminal; The second judging unit is configured to judge whether the monitoring terminal and the positioning terminal have searched for the same WIFI signal source according to the first WIFI location information and the second WIFI location information according to the trigger of the first judging unit, and obtain first judgment result; The second determining unit is configured to determine that the monitoring terminal exceeds the virtual fence area if the first judgment result is that the monitoring terminal and the positioning terminal do not find the same WIFI signal source; A third determining unit, configured to determine that the monitoring terminal is within the virtual fence area if the first determination result is that the monitoring terminal and the positioning terminal have searched for the same WIFI signal source. 8. The monitoring device according to claim 7, wherein the first location information further includes first base station location information, and the second location information further includes second base station location information, Correspondingly, if the preset threshold is greater than the limit value, the judging module further includes: A third judging unit, configured to judge whether the monitoring terminal and the positioning terminal are within the coverage of the same base station according to the location information of the first base station and the location information of the second base station, and obtain a second judgment result; The fourth judging unit is configured to make the second judging unit execute the second judging unit according to the first WIFI location information and the second WIFI location information if the second judging result is that the monitoring terminal and the positioning terminal are within the coverage of different base stations. WIFI location information, the step of judging whether the monitoring terminal and the positioning terminal have searched for the same WIFI signal source; The fourth determination unit is configured to determine that the monitoring terminal is within the virtual fence area if the second determination result is that the monitoring terminal and the positioning terminal are within the coverage of the same base station. 9. A cloud server, characterized in that it comprises a monitoring device based on a follow-up virtual fence according to any one of claims 5-8. 10. A monitoring system based on a follow-up virtual fence, comprising a monitoring terminal, a positioning terminal and the cloud server according to claim 9. 11. The monitoring system according to claim 10, wherein the monitoring terminal is connected to the positioning terminal through short-distance wireless communication, and if the connection is established successfully, it is determined that the monitoring terminal is in the preset and Within the virtual fence area associated with the positioning terminal; if the connection establishment fails, the monitoring terminal sends first location information to the cloud server; the positioning terminal sends second location information to the cloud server.