阅读说明：本技术 智能管网检测系统及方法 (Intelligent pipe network detection system and method ) 是由 陈伟强 于 2021-02-06 设计创作，主要内容包括：本发明提供了一种智能管网检测系统及方法,在管网的每根管道上设置智能芯片和检测器件,以实时检测管道的变形破裂情况,智能芯片根据检测结果向中转发送装置发送检测信号,中转发送装置再根据检测信号广播通知信号,以便在管网上方的地面或空中移动的移动式接收装置接收并向监控中心转发该通知信号；从而使监控中心能够及时发现地下管网的管道变形破裂情况,有利于及时采取应对措施,避免引起严重事故。(The invention provides an intelligent pipe network detection system and a method, wherein each pipeline of a pipe network is provided with an intelligent chip and a detection device so as to detect the deformation and rupture conditions of the pipeline in real time, the intelligent chip sends a detection signal to a transfer sending device according to the detection result, and the transfer sending device broadcasts an informing signal according to the detection signal, so that a mobile receiving device moving on the ground or in the air above the pipe network receives and forwards the informing signal to a monitoring center; therefore, the monitoring center can find the deformation and breakage conditions of the pipelines of the underground pipe network in time, and is favorable for taking response measures in time to avoid causing serious accidents.)

1. The utility model provides an intelligence pipe network detecting system which characterized in that includes:

a monitoring center;

each pipeline is provided with an intelligent chip and a plurality of detection devices electrically connected with the intelligent chip; the intelligent chip is used for detecting the deformation and breakage conditions of the corresponding pipeline through the detection device, generating a detection signal according to a detection result and sending the detection signal out;

the transfer transmitting devices are used for receiving the detection signals of the intelligent chip and generating notification signals according to the detection signals for broadcasting;

and the mobile receiving devices can move on the ground or in the air above the pipe network, are used for receiving the notification signals broadcast by the transfer sending devices and transmit the notification signals to the monitoring center.

2. The intelligent pipe network detection system according to claim 1, wherein the transit sending devices are arranged in sand wells, one transit sending device is arranged in each sand well, and the intelligent chip is arranged in a part of the pipeline extending into the sand well.

3. The intelligent pipe network detection system according to claim 2, wherein two ends of each pipeline respectively extend into two adjacent sand wells, and the intelligent chip is arranged at one end of each pipeline.

4. The intelligent pipe network detection system according to claim 3, wherein the detection device comprises a metal wire, the metal wire is arranged in the pipe wall of the pipeline, one end of the metal wire is electrically connected with the intelligent chip, and the other end of the metal wire is rotated and returned to be electrically connected with the intelligent chip along the axial direction of the pipeline after extending to the end of the pipeline away from the intelligent chip along the axial direction of the pipeline; the intelligent chip detects the deformation and rupture conditions of the corresponding pipeline by detecting the resistance of the metal wire.

5. The intelligent pipe network detection system according to claim 4, wherein a plurality of detection devices are arranged, and the plurality of detection devices are uniformly arranged along the circumferential direction of the pipeline.

6. The intelligent pipe network detection system according to claim 4, wherein the pipe is formed by connecting a plurality of sections of sub-pipes, one of two butt joint end surfaces of two adjacent sections of sub-pipes is provided with a terminal pin, the other butt joint end surface is provided with a corresponding terminal jack, and the terminal pin and the corresponding terminal jack are plugged to connect the metal wires in the two sections of sub-pipes.

7. The intelligent pipe network detection system according to claim 6, wherein one of the two butt joint end surfaces of two adjacent segments of sub-pipes is provided with a positioning insertion column, the other butt joint end surface is provided with a corresponding positioning insertion hole, and the positioning insertion column is inserted into the corresponding positioning insertion hole.

8. The intelligent pipe network detection system of claim 1, wherein the mobile receiving device is disposed on a mobile carrier, and the mobile carrier is a vehicle or an unmanned aerial vehicle.

9. An intelligent pipe network detection method, which is applied to a transit transmitting device of the intelligent pipe network detection system of any one of claims 1 to 8, and comprises the following steps:

A1. receiving a detection signal periodically sent by an intelligent chip;

A2. judging whether the corresponding pipeline deforms and breaks according to the detection signal;

A3. if not, generating a first notification signal, and periodically broadcasting the first notification signal according to a first preset period;

A4. if so, generating a second notification signal, and periodically broadcasting the second notification signal according to a second preset period; the second preset period is shorter than the first preset period.

10. The intelligent pipe network detection method according to claim 9, wherein after step a4, the method further comprises:

A5. and if the response signal sent back by the mobile receiving device is not received within the first preset time from the moment of broadcasting the second notification signal for the first time, shortening the second preset period.

Technical Field

The invention relates to the technical field of pipelines, in particular to an intelligent pipe network detection system and method.

Background

Underground pipe networks (such as sewer networks, drainage networks, tap water pipe networks and the like) are buried underground, and pipelines in the pipe networks are deformed and broken due to various reasons (such as geological changes), so that liquid in the pipes flows out, and accidents such as environmental pollution, ground collapse and the like are caused. When the pipeline is deformed and cracked, the general underground pipe network can not find the deformation and cracking condition of the pipeline in time, and the deformation and cracking condition of the pipeline can be found only when the pipeline is deformed and cracked to cause accidents. Therefore, a pipe network detection system capable of timely finding out the deformation and rupture conditions of the underground pipe network is needed.

Disclosure of Invention

In view of the defects of the prior art, the embodiment of the application aims to provide an intelligent pipe network detection system and method, which can find the deformation and fracture conditions of the underground pipe network in time.

In a first aspect, an embodiment of the present application provides an intelligent pipe network detection system, including:

a monitoring center;

each pipeline is provided with an intelligent chip and a plurality of detection devices electrically connected with the intelligent chip; the intelligent chip is used for detecting the deformation and breakage conditions of the corresponding pipeline through the detection device, generating a detection signal according to a detection result and sending the detection signal out;

the transfer transmitting devices are used for receiving the detection signals of the intelligent chip and generating notification signals according to the detection signals for broadcasting;

and the mobile receiving devices can move on the ground or in the air above the pipe network, are used for receiving the notification signals broadcast by the transfer sending devices and transmit the notification signals to the monitoring center.

In the intelligent pipe network detection system, the transfer transmitting devices are arranged in sand wells, each sand well is provided with one transfer transmitting device, and the intelligent chip is arranged in a part of the pipeline extending into the sand well.

Furthermore, every the both ends of pipeline stretch into respectively in two adjacent sand shafts, intelligent chip sets up the one end of pipeline.

In the intelligent pipe network detection system, the detection device comprises a metal wire, the metal wire is arranged in the pipe wall of the pipeline, one end of the metal wire is electrically connected with the intelligent chip, and the other end of the metal wire is extended to one end of the pipeline far away from the intelligent chip along the axial direction of the pipeline, revolves and returns along the axial direction of the pipeline to be electrically connected with the intelligent chip; the intelligent chip detects the deformation and rupture conditions of the corresponding pipeline by detecting the resistance of the metal wire.

Furthermore, the detection devices are arranged in a plurality of numbers, and the detection devices are uniformly distributed along the circumferential direction of the pipeline.

In some embodiments, the pipeline is formed by connecting a plurality of sections of sub-pipelines, and of two butt joint end faces of two adjacent sections of sub-pipelines, one butt joint end face is provided with a terminal pin, and the other butt joint end face is provided with a corresponding terminal jack, and the terminal pin and the corresponding terminal jack are plugged to connect the metal wires in the two sections of sub-pipelines.

Furthermore, in two butt joint end faces of two adjacent sections of sub-pipelines, one butt joint end face is provided with a positioning insertion column, the other butt joint end face is provided with a corresponding positioning insertion hole, and the positioning insertion column is inserted into the corresponding positioning insertion hole.

In the intelligent pipe network detection system, the mobile receiving device is arranged on a mobile carrier, and the mobile carrier is a vehicle or an unmanned aerial vehicle.

In a second aspect, an embodiment of the present application provides an intelligent pipe network detection method, which is applied to a transit sending device of an intelligent pipe network detection system, and includes the steps of:

A1. receiving a detection signal periodically sent by an intelligent chip;

A2. judging whether the corresponding pipeline deforms and breaks according to the detection signal;

A3. if not, generating a first notification signal, and periodically broadcasting the first notification signal according to a first preset period;

A4. if so, generating a second notification signal, and periodically broadcasting the second notification signal according to a second preset period; the second preset period is shorter than the first preset period.

In the method for detecting an intelligent pipe network, after the step a4, the method further comprises:

A5. and if the response signal sent back by the mobile receiving device is not received within the first preset time from the moment of broadcasting the second notification signal for the first time, shortening the second preset period.

Has the advantages that:

according to the intelligent pipe network detection system and method provided by the embodiment of the application, an intelligent chip and a detection device are arranged on each pipeline of a pipe network so as to detect the deformation and rupture conditions of the pipelines in real time, the intelligent chip sends a detection signal to a transfer sending device according to the detection result, and the transfer sending device broadcasts an informing signal according to the detection signal so that a mobile receiving device moving on the ground or in the air above the pipe network can receive and forward the informing signal to a monitoring center; therefore, the monitoring center can find the deformation and breakage conditions of the pipelines of the underground pipe network in time, and is favorable for taking response measures in time to avoid causing serious accidents.

Drawings

Fig. 1 is a schematic view of an intelligent pipe network detection system provided in an embodiment of the present application.

Fig. 2 is a schematic structural diagram of a first pipeline in the intelligent pipe network detection system provided in the embodiment of the present application.

Fig. 3 is a cross-sectional view of a pipeline in the intelligent pipe network detection system provided in the embodiment of the present application.

Fig. 4 is a schematic structural diagram of a second pipeline in the intelligent pipe network detection system provided in the embodiment of the present application.

Fig. 5 is a connection structure diagram of sub-pipes of a second type of pipe in the intelligent pipe network detection system provided in the embodiment of the present application.

Fig. 6 is a flowchart of an intelligent pipe network detection method provided in the embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present application without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. Meanwhile, in the description of the present application, the terms "first", "second", and the like are used only for distinguishing the description, and are not to be construed as indicating or implying relative importance.

Referring to fig. 1, an intelligent pipe network detection system provided in an embodiment of the present application includes:

a monitoring center 1;

the device comprises a plurality of pipelines 2, wherein each pipeline 2 is provided with an intelligent chip 3 and a plurality of detection devices 4 electrically connected with the intelligent chip 3; the intelligent chip is used for detecting the deformation and rupture conditions of the corresponding pipeline 2 through the detection device 4, generating a detection signal according to a detection result and sending the detection signal out;

the transfer transmitting devices 5 are used for receiving the detection signals of the intelligent chip 3 and generating notification signals according to the detection signals for broadcasting;

the mobile receiving devices 6 can move on the ground or in the air above the pipe network, and are used for receiving the notification signals broadcast by the relay sending device 5 and forwarding the notification signals to the monitoring center 1.

In practical application, a plurality of pipelines 2 are connected to form a pipe network (underground pipe network), the intelligent chip 3 of each pipeline 2 detects the deformation and rupture condition of the corresponding pipeline 2 in real time through the detection device 4, if the pipeline 2 is normal, the intelligent chip 3 generates a first detection signal indicating that the pipeline is normal and sends the first detection signal to the transfer sending device 5, if the pipeline 2 is deformed and ruptured, the intelligent chip 3 generates a second detection signal indicating that the pipeline is deformed and ruptured and sends the second detection signal to the transfer sending device 5, when the transfer sending device 5 receives the first detection signal, the first notification signal is generated for broadcasting, and when the second detection signal is received, the second notification signal is generated for broadcasting; when the mobile receiving device 6 works, the mobile receiving device patrols on the ground or in the air above the pipe network, receives the corresponding notification signal when passing through the vicinity of the transfer sending device 5 and forwards the notification signal to the monitoring center 1, so that the monitoring center 1 can judge whether the corresponding pipeline 2 is deformed or broken according to the specific type of the notification signal, the monitoring center can find out the deformation and breakage condition of the pipeline of the underground pipe network in time, the method is favorable for taking corresponding measures in time, and serious accidents are avoided.

Since the power for transmitting the notification signal should be large enough to ensure that the mobile receiving device 6 can reliably receive the notification signal, compared with the method of broadcasting the notification signal directly through the antenna by the smart chip 3, the relay transmitting device 5 is provided here for relaying the signal, the power requirement for the smart chip 3 is small, which is beneficial to the miniaturization and simplification of the smart chip 3, thereby being beneficial to reducing the price of the pipeline 2, and when a certain pipeline 2 is replaced after being deformed and broken, the cost is small (the relay transmitting device 5 does not need to be replaced together).

In practical applications, in order to facilitate maintenance of the pipe network, sand wells 90 are usually arranged at intervals (usually 25m to 50 m) along the extending direction of the pipe network; thus, in some preferred embodiments, the transshipment devices 5 are disposed in the sand wells 90 (as shown in fig. 1), one transshipment device 5 is disposed in each sand well 90, and the smart chip 3 is disposed in the portion of the pipe 2 extending into the sand well 90. The transfer transmitting device 5 is arranged in the sand pit 90, a shaft does not need to be additionally arranged to install the transfer transmitting device 5 and an antenna 5.1 thereof (the transfer transmitting device 5 comprises the antenna 5.1), and the transfer transmitting device 5 is convenient to maintain; set up intelligent chip 3 in the part that pipeline 2 stretched into sand well 90, be favorable to intelligent chip 3 and the transfer sender 5 that corresponds to carry out reliable communication, especially when intelligent chip 3 carries out the communication through wireless communication mode with transfer sender 5.

The intelligent chip 3 is in communication connection with the corresponding transfer transmitting device 5 in a wired mode or a wireless mode. For example, in fig. 1, the smart chip 3 is in communication connection with the corresponding relay sending device 5 in a wireless manner, so that the smart chip 3 and the relay sending device 5 both include wireless communication modules (such as WIFI communication modules, ZIFBEE communication modules, or other communication modules).

Further, in some embodiments, as shown in fig. 1, two ends of each pipe 2 respectively extend into two adjacent sand wells 90, and the smart chip 3 is disposed at one end of the pipe 2. Therefore, the transfer device 5 in each sand well 90 corresponds to one pipeline 2, and the positioning of the deformed and broken pipelines is facilitated.

For example, in some embodiments, the detection signal sent by the smart chip 3 includes the positioning information of the smart chip 3 (the smart chip 3 includes a positioning module, such as a GPS positioning module, a beidou positioning module, etc.), so that the relay transmitter 5 adds the positioning information to the notification signal; so that the monitoring center 1 can quickly locate the deformed and broken pipeline. In other embodiments, the detection signal sent by the intelligent chip 3 contains the number information of the intelligent chip 3, so that the relay sending device 5 adds the number information to the notification signal; the monitoring center 1 can use the number information to inquire in a prestored position inquiry table to obtain the position information of the corresponding pipeline, thereby realizing the positioning of the deformed and cracked pipeline. In other embodiments, the notification signal broadcast by the relay transmitting device 5 includes the positioning information of the relay transmitting device 5 (the relay transmitting device 5 includes a positioning module, such as a GPS positioning module, a beidou positioning module, etc.), and since the relay transmitting device 5 is in one-to-one correspondence with the pipeline 2, the monitoring center 1 can quickly position the corresponding pipeline 2 by centering the positioning information of the relay transmitting device 5. In other embodiments, the notification signal broadcast by the relay sending device 5 includes the number information of the relay sending device 5, and the monitoring center 1 may query the pre-stored location lookup table by using the number information to obtain the location information of the relay sending device 5, and since the relay sending devices 5 are in one-to-one correspondence with the pipelines 2, the monitoring center 1 may quickly locate the corresponding pipelines 2 by using the location information of the relay sending devices 5.

In this embodiment, as shown in fig. 1-4, the detecting device 4 includes a metal wire, the metal wire is disposed in the pipe wall 2.1 of the pipe 2, one end of the metal wire is electrically connected to the intelligent chip 3, and the other end of the metal wire extends along the axial direction of the pipe 2 to the end of the pipe 2 away from the intelligent chip 3, and then turns around and returns along the axial direction of the pipe 2 to be electrically connected to the intelligent chip 3 (i.e. the metal wire extends along a U-shape, and both ends of the metal wire are electrically connected to the intelligent chip 3); the intelligent chip 3 detects the deformation and rupture conditions of the corresponding pipeline 2 by detecting the resistance of the metal wire. Specifically, intelligent chip 3 includes resistance detection circuit and microprocessor, this wire and resistance detection circuit connection, can make the wire tensile when 2 bending deformation of pipeline, thereby change the resistance of wire, resistance detection circuit detectable arrives the resistance change condition of wire, if pipeline 2 bending deformation is too big or the fracture, then can lead to the too big or fracture of wire tensile length, thereby make the resistance that detects too big, consequently, microprocessor accessible wire resistance's testing result judges whether pipeline 2 warp and breaks: and when the resistance of the metal wire is detected to be larger than a preset resistance threshold value, judging that the corresponding pipeline 2 is deformed and broken, otherwise, judging that the corresponding pipeline 2 is normal. Wherein, the resistance threshold value can be set according to actual needs.

The number of the detection devices 4 can be set according to actual needs; in some preferred embodiments, the detecting device 4 is provided in plurality, and the plurality of detecting devices 4 are uniformly arranged along the circumferential direction of the pipe 2. Therefore, when the intelligent chip 3 detects that the pipeline 2 is deformed and broken through the at least one detection device 4, the pipeline 2 is judged to be deformed and broken, and the reliability of the detection result is improved. For example, in fig. 3, four detection devices 4 are provided, and the four detection devices 4 are uniformly arranged along the circumferential direction of the pipe 2 so as to be able to be detected regardless of the direction in which the pipe 2 is deformed and broken.

It should be noted that, when the detecting device 4 is provided with a plurality of detecting devices 4 and the detecting device 4 includes a metal wire, because the intelligent chip 3 is provided with only one detecting device, a part or all of the metal wires include a connecting section extending along the circumferential direction of the pipeline 2 and a main body section extending along the axial direction of the pipeline 2, and the main body section is electrically connected with the intelligent chip 3 through the connecting section.

In some embodiments, as shown in fig. 2, each tube 2 is a full tube, such that the wires in the tubes 2 are continuous.

In other embodiments, as shown in fig. 4 and 5, the pipe 2 is formed by connecting a plurality of sections of sub-pipes 2.2, one of two abutting end surfaces of two adjacent sections of sub-pipes 2.2 is provided with a terminal pin 2.3, the other abutting end surface is provided with a corresponding terminal jack (not shown in the figure), and the terminal pin 2.3 and the corresponding terminal jack are inserted to connect the wires in the two sections of sub-pipes 2.2 (because the pipe 2 is segmented, the inner wires are correspondingly segmented). The adjacent two segments of subducting 2.2 can be connected by a connecting collar 2.4, but is not limited to the above. Generally, when the length of each pipe 2 is long, such a segmented structure can be adopted to reduce the difficulty of production and transportation.

Further, as shown in fig. 5, in two butt joint end faces of two adjacent sections of the sub-pipes 2.2, one butt joint end face is provided with a positioning insertion column 2.5, the other butt joint end face is provided with a corresponding positioning insertion hole (not shown in the figure), and the positioning insertion column 2.5 is inserted into the corresponding positioning insertion hole. Through the positioning action of post 2.5 and location jack is inserted in the location, can guarantee that terminal contact pin 2.3 reliably aims at with the terminal jack that corresponds to make things convenient for the connection between the section subduct 2.2, and insert the shearing force between the post 2.5 undertakes the connection terminal surface by the location, avoid terminal contact pin 2.3 fracture. Wherein, the length of post 2.5 is inserted to the location is longer than terminal contact pin 2.3 to the location is inserted post 2.5 and is docked the back with the location jack earlier, and terminal contact pin 2.3 reinserts in the terminal jack that corresponds.

Wherein, the quantity and the position of post 2.5 are inserted in the location can set up as required, for example in fig. 5, the post 2.5 is inserted in the location is provided with four to evenly arrange along the circumference of butt joint terminal surface.

In order to realize the patrol movement of the mobile receiving device 6, the mobile receiving device 6 can be arranged on a mobile carrier 7, which is a vehicle or an unmanned aerial vehicle. The mobile carrier 7 is, for example, a special vehicle which patrols along a preset route. For example, the mobile carrier 7 is a public transportation means such as a bus or a taxi, and the configuration and operation costs can be reduced by installing the mobile receiving apparatus 6 on an existing public transportation means.

In practical use, the intelligent chip 3 may periodically send the detection signal according to a preset period, and the relay sending device 5 may periodically broadcast the first notification signal according to a first preset period under normal conditions (the first preset period may be the same as or different from the sending period of the intelligent chip 3), and when the deformation and rupture of the pipeline 2 are detected, the relay sending device 5 periodically broadcasts the second notification signal according to a second preset period, and the second preset period is shorter than the first preset period (i.e. the emission frequency of the second notification signal is higher than the emission frequency of the first notification signal); therefore, under normal conditions, the frequency for transmitting the notification signal can be set to be lower so as to reduce energy consumption, and when the deformation and the breakage of the pipeline 2 are detected, the notification signal is transmitted at a higher frequency, so that the mobile receiving device 6 can receive the notification signal in time, and the monitoring center 1 can find the deformation and the breakage of the pipeline in time.

In practical use, the mobile receiving device 6 is further configured to send a response signal back to the relay transmitting device 5 after receiving the notification signal, so that the relay transmitting device 5 knows whether any mobile receiving device 6 receives the notification signal. Thus, the relay transmitter 5 is also used to receive the response signal sent back by the mobile receiver 6.

In practical use, the relay transmitter 5 is further configured to shorten the second preset period (i.e. increase the transmission frequency of the second notification signal) if the response signal sent back by the mobile receiver 6 is not received within the first preset time from the time of broadcasting the second notification signal for the first time. To improve the probability that the mobile receiving device 6 receives the second notification signal in time.

In practical use, the relay transmitter 5 is further configured to broadcast a relay command to enable the other relay transmitters 5 to start a relay function to relay the second notification signal if the response signal sent back by the mobile receiver 6 is not received within a second preset time period from the time when the second notification signal is broadcast for the first time. After the relay function is started by the other relay sending devices 5, the second notification signal is received and then broadcast out in a broadcast mode, so that the coverage range of the second notification signal is greatly increased, and the probability that the mobile receiving device 6 receives the second notification signal in time is further improved.

Based on the above intelligent pipe network detection system, the embodiment of the present application further provides an exemplary intelligent pipe network detection method, where the method is applied to the transfer transmitting device 5 of the intelligent pipe network detection system, and includes the steps of:

A1. receiving a detection signal periodically sent by an intelligent chip;

A2. judging whether the corresponding pipeline deforms and breaks according to the detection signal;

A3. if not, generating a first notification signal, and periodically broadcasting the first notification signal according to a first preset period;

A4. if so, generating a second notification signal, and periodically broadcasting the second notification signal according to a second preset period; the second preset period is shorter than the first preset period.

The intelligent chip sends out a first detection signal indicating that the pipeline is normal when the pipeline is normal, and sends out a second detection signal indicating that the pipeline is deformed and broken when the pipeline is deformed and broken. Therefore, in step a2, if the detection signal is the first detection signal, it is determined that the corresponding pipe is normal, and if the detection signal is the second detection signal, it is determined that the corresponding pipe is deformed and broken. For example, the data frame of the detection signal includes a status bit, which is 0 in the first detection signal and 1 in the second detection signal, so that in step a2, whether the detection signal is the first detection signal or the second detection signal is determined by detecting whether the status bit in the data frame of the detection signal is 0 or 1.

In some preferred embodiments, after step a4, the method further comprises:

A5. if the response signal sent back by the mobile receiving device is not received within the first preset time from the time of broadcasting the second notification signal for the first time, the second preset period is shortened (namely, the frequency of sending the second notification signal is increased).

Thereby increasing the probability that the mobile receiving device 6 will receive the second notification signal in time.

In some preferred embodiments, after step a4, the method further comprises:

A6. if the response signal sent back by the mobile receiving device is not received within the second preset time from the time of broadcasting the second notification signal for the first time, a relay instruction is broadcasted, so that other relay sending devices start a relay function to relay the second notification signal.

Therefore, the coverage area of the second notification signal is greatly increased, and the probability that the mobile receiving device 6 receives the second notification signal in time is further improved.

In some preferred embodiments, after step a4, the method further comprises:

A7. if N response signals sent back by different mobile receiving devices are received from the time of broadcasting the second notification signal for the first time, a second preset period is increased (i.e. the frequency of sending the second notification signal is decreased), wherein N is a preset threshold of times and is a positive integer.

In practical application, after receiving the second notification signal, the mobile receiving device 6 may not be able to forward the second notification signal to the monitoring center 1 in time due to abnormal network connection or other faults, but the probability that none of the N mobile receiving devices 6 can forward is small, so when there are N mobile receiving devices 6 receiving the second notification signal and sending back an acknowledgement signal, the probability that the monitoring center 1 receives the second notification signal is high, and at this time, the sending frequency can be reduced to reduce energy consumption. The second predetermined period may be returned to the initial value or increased to be the same as the first predetermined period. Where N may be set according to actual needs, e.g. N = 6.

In some embodiments, the first notification signal and the second notification signal each include positioning information of the corresponding smart chip. The positioning information is extracted from the detection signal sent by the intelligent chip.

In some embodiments, the first notification signal and the second notification signal each include number information of the corresponding smart chip. The number information of the intelligent chip is extracted from the detection signal sent by the intelligent chip.

In some embodiments, the first notification signal and the second notification signal each include the positioning information of the relay transmission device 5.

In some embodiments, the first notification signal and the second notification signal each include the number information of the relay transmission device 5.

In summary, although the present invention has been described with reference to the preferred embodiments, the above-described preferred embodiments are not intended to limit the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, which are substantially the same as the present invention.