CN103985240A - Anti-theft method for street lamp cable based on ZigBee and GSM (Global System for Mobile Communications) network - Google Patents
Anti-theft method for street lamp cable based on ZigBee and GSM (Global System for Mobile Communications) network Download PDFInfo
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Abstract
The invention relates to an anti-theft method for a street lamp cable based on ZigBee and a GSM (Global System for Mobile Communications) network and belongs to the technical field of the anti-theft alarm of cables. According to the technical scheme, a terminal voltage measuring device is arranged in the street lamp cable to measure the voltage of the cable and is connected to a controller loaded with a ZigBee module, the controller is used for immediately acquiring voltage of the cable, the voltage of the cable is sent to an upper computer through the ZigBee module, a GSM module is loaded in the upper computer and is used for sending the voltage of the cable to a municipal administration department at regular time, warning information is sent immediately when the voltage is abnormal, and an error site of the cable is timely positioned through a ZigBee subnet node label, so that the problem can be conveniently and timely solved by the municipal administration department; if the cable is stolen, the steeling time and site can be rapidly determined, so that the survey of public security organs is facilitated. The method has the advantages that the cost is low; multiple links such as testing principles, reporting manners and the like are optimized, so that the cable steeling warning reliability and accuracy are greatly improved.
Description
Technical field
The present invention relates to a kind of road lighting cable theft preventing method based on ZigBee and GSM network, for solving road lighting cable monitoring and the antitheft problem of initiative alarming in real time.
Background technology
Road lighting cable theft preventing method has following several at present:
Terminal voltage mensuration, the method adopts and installs voltage detecting and communication device additional at cable end piece, carries out communication be connected by fixed power source power supply by radio communication with main website.Supply with 48V DC voltage by front end panel box to cable daytime, and night is normal supply 220V alternating voltage, once end power-off thinks that cable is stolen, reports to the police at once to main website.This is one of cable theft-prevention detection mode the most reliably at present, rate of false alarm is low, accurate positioning, response fast, but through practice, also find certain problem: early investment cost and installation difficulty are larger, road lighting cable end all needs to configure Wireless Telecom Equipment, the installation allocation problem of antenna, lightning measure problem etc.
ZigBee technology, ZigBee is a kind of wireless network protocol of low speed short-distance transmission.Zigbee protocol is respectively Physical layer (PHY), MAC layer (MAC), transport layer (TL), network layer (NWK), application layer (APL) etc. from top to bottom.Wherein Physical layer and MAC layer are followed the regulation of IEEE802.15.4 standard.
ZigBee-network principal feature is low-power consumption, low cost, low rate, support great deal of nodes, support multiple network topology, low complex degree, quick, reliable, safety.Equipment in ZigBee-network can be divided into the Three roles such as telegon (Coordinator), aggregation node (Router), sensor node (EndDevice).
Meanwhile, ZigBee is as a kind of short-distance wireless communication technology, because its network can, easily for user provides wireless data transmission function, therefore have very strong applicability in Internet of Things field, field of intelligent control.
GSM technology and gsm module, GSM is the abbreviation of Global System For Mobile Communications, a digital mobile communication standard of being worked out by the ETSI of ETSI, GSM is the abbreviation of global system for mobile communications (Global System for Mobile communications).Its air interface adopts tdma.Since the mid-90 puts it into commercial operation, by the whole world, surpassed 100 countries and adopted.The equipment of GSM standard occupies Present Global cellular mobile communication equipment Market more than 80%.
GSM is current application mobile phone standard the most widely.The whole world surpasses 200 countries and regions and is using GSM phone over 1,000,000,000 people.All users can sign free-roaming between " roaming agreement " mobile-phone carrier.GSM is digital than the signaling that is not both it and the voice channel of the standard maximum before it, so GSM is counted as the second generation (2G) mobile telephone system.This explanation digital communication is from being building up to system very early.GSM is a current open standard of being developed by 3GPP.
Gsm module, is that GSM radio frequency chip, baseband processing chip, storer, power discharging device etc. are integrated on a wiring board, has independently operating system, GSM radio frequency processing, Base-Band Processing and the functional module of standard interface is provided.Gsm module has transmission SMS messaging, voice call, all basic functions that GPRS data transmission etc. communicates based on GSM network.Single-chip microcomputer can directly be communicated by letter with gsm module, controls gsm module realize various radio communication functions with the AT order of standard.
The power line carrier mode that mainly adopts current cable theft-prevention realizes and the communicating by letter of single Lantern Festival point or street lamp section, for example, by the patent of invention CN101937600B of Oceanic Instruments & Meters Inst., Shandong Prov. Academy of Sciences, 2013.06.26, Anti-theft alarm system for street, use GPRS communication module, acoustic-optic alarm and be parallel to the power impedor on each street lamp, and cable initiating terminal and end initiating terminal cable alarm and end cable alarm be installed on cable live wire and zero line, alarm is connected and reaches warning object with GPRS communication module.The core of aforesaid way is if cable is stolen, communication failure, thus think that cable is stolen, and carry out the stolen report and alarm of cable.Yet there are many problems in power carrier method: (1) daytime cannot be antitheft: current road lamp system cannot be powered daytime, the basic condition that power line carrier communication is existed like this--power carrier does not exist, cause cable theft-prevention normally to work, this is the stolen material time section of cable in practical application exactly;
(2) power line carrier is antitheft based on modulation signal on power line signal basis, in side circuit, along with operating voltage, electric load individual difference, power line carrier reliability is subject to serious test, antitheft reliability is not high, wrong report in actual use, rate of failing to report approximately 1%.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, a kind of road lighting cable theft preventing method based on ZigBee and GSM network is provided, to realize the antitheft and initiative alarming to cable.
Technical scheme of the present invention is as follows:
A kind of streetlamp cable anti-theft system based on ZigBee and GSM network, comprise PC control core, ZigBee subnet node, GSM transmitter module and terminal voltage measurement mechanism, it is characterized in that ZigBee subnet node is connected by radio communication with PC control core, terminal voltage measurement mechanism and ZigBee subnet node are integrated and connected and are directly installed on the cable between street lamp, and ZigBee subnet node comprises CPU (central processing unit) and coupled ZigBee communications gateway module; Terminal voltage measurement mechanism comprises data acquisition module and A/D converter, data acquisition module comprises direct current measurement circuit and AC measurment circuit, wherein direct current measurement circuit is comprised of the divider resistance of 1 series connection, and be directly connected with any two-phase of cable and the input end of A/D converter, the output terminal of A/D converter is connected to ZigBee subnet node; AC measurment circuit comprises coupling transformer and rectifier filer, the input end of transformer is directly connected in cable arbitrarily in two-phase, the output terminal of transformer is connected with rectifier filer, the output terminal of rectifier filer is connected with the input end of A/D converter, and the output terminal of A/D converter is connected to ZigBee subnet node; Data acquisition module is connected integrated being installed on road lighting cable with A/D converter and ZigBee subnet node sequence, and is its power supply by the direct supply of installing on road lighting cable; PC control core comprises CPU (central processing unit), data storage cell, GSM transmitter module, ZigBee communications gateway module, human-computer interaction module and power supply, wherein ZigBee communications gateway module is directly integrated in CPU (central processing unit), and CPU (central processing unit) is connected with data storage cell, GSM transmitter module, ZigBee communications gateway module, human-computer interaction module respectively through its I/O interface; Power supply is connected respectively to CPU (central processing unit), data storage cell, GSM transmitter module, ZigBee communications gateway module and human-computer interaction module for its power supply; Human-computer interaction module comprises matrix keyboard and 12864LCD liquid crystal display; Data storage cell comprises SD card, Flash and EEPROM;
The CC2430 chip of described CPU (central processing unit) ShiTI company.
Described GSM transmitter module is used SIM900A integration module.
A road lighting cable theft preventing method based on ZigBee and GSM network, step is as follows:
1, start, each module initialization, ZigBee subnet node and PC control core power on, each ZigBee subnet node plays ZigBee subnet according to Z-Stack protocol stack arrangement, PC control core is to each ZigBee subnet poll, check whether it all enters normal operating conditions, and be its power supply by the direct supply of installing on road lighting cable daytime;
2, terminal voltage measurement mechanism obtains the voltage parameter of each monitored phase by its data acquisition module BOB(beginning of block), and the voltage parameter of each phase monitoring is sent to ZigBee subnet node through A/D converter;
3, set in advance the upper and lower limit threshold value of road lighting cable voltage, wherein upper limit threshold is 250V, and lower threshold is 180V; Whether the change in voltage that the judgement of ZigBee subnet node receives reaches threshold value, and when lower than 180V or higher than 250V threshold value, by trigger alarm, now decision circuitry cable breaks down;
4, for preventing that wrong report from occurring, system can judge after the stand-by time of 10 seconds whether received change in voltage reaches threshold value, if the change in voltage receiving in 10 seconds that set is outside 180V-250V threshold range, to other ZigBee subnet nodes, send inquiry, otherwise wait for next voltage uploading data;
If 5 other ZigBee subnet node voltages change, also surpass threshold value, reported PC control core;
6, PC control core record breaks down ZigBee subnet node label and time, according to ZigBee subnet node label, resolve ZigBee subnet node location, and to municipal administration department, send warning message by GSM transmitter module, be sent in the warning message when and where cable fault occurs.
What this programme cable theft-prevention detected employing is terminal voltage mensuration, if cable is stolen, the voltage between cable can change, when change in voltage surpasses early warning value (in case producing wrong report because of voltage instability), think that cable is stolen, and by the stolen alarm of telegram cable on ZigBee subnet node.
Can 24 hours monitored in order to guarantee road lighting cable, street lamp circuit must guarantee that whole day has voltage, and we provide 48V DC voltage by front end panel box daytime here, normally detect the 220V alternating voltage on road lighting cable evening.
The present invention includes PC control core, ZigBee subnet node, GSM transmitter module and terminal voltage measurement mechanism; Communication is connected described ZigBee subnet node with PC control core wireless, and terminal voltage measurement mechanism and ZigBee subnet node are integrated, and terminal voltage measurement mechanism is directly installed on the cable between street lamp.
Described PC control core is integrated with GSM transmitter module, comprises CPU (central processing unit) simultaneously, data storage cell, ZigBee communications gateway module, human-computer interaction module and power supply; Wherein CPU (central processing unit) respectively with data storage cell, ZigBee communications gateway module, human-computer interaction module is connected with power supply.
Described ZigBee subnet node is used the CC2430 chip of TI company, comprising CPU (central processing unit), and ZigBee communication gate, and be connected with terminal voltage measurement mechanism.
Principle of work of the present invention is: 1, terminal voltage measurement mechanism is arranged on the end of street lamp power supply, road lamp power supply cable, in 3 phase 4 line feed circuit, single lamp cable theft-prevention terminal voltage measurement mechanism is installed respectively in the wherein two-phase of A phase, B phase, C phase supply line, as terminal voltage measurement mechanism being installed respectively at A phase and B in mutually.
2, at street lamp power supply, road lamp power supply cable leading portion, DC power supply is installed, power supply positive and negative polarities are arranged on respectively and are equipped with in terminal voltage measurement mechanism two-phase cable.In the street lamp non-working time, provide 48V DC voltage.
3, under system normal operation, service cable is powered by DC power supply daytime, and terminal voltage measurement mechanism Real-Time Monitoring supply voltage judges that by the cable power supply voltage detecting whether cable is stolen.
4, when voltage fluctuation surpasses after threshold value, it is stolen that i.e. judgement detects cable, the measured value of terminal voltage measurement mechanism can upload in time repacking and put residing ZigBee subnet node, ZigBee subnet node uploads to PC control core by ZigBee subnet in time by the stolen information of cable after computing judgement, realizes the stolen timely alarm of cable.
5, in municipal road lamp system operational process, along with the moment impact such as supply voltage, environment, system there will be a certain branch road because of overload trip phenomenon, and simple employing detected a certain branch voltage when judging that whether cable is stolen, there will be switch trip to be mistaken for cable stolen.According to municipal sector's actual count, switch trip accounts for website fault 1%, scale with 100,000 road lamp systems, monthly the number of stoppages is in 500 left and right, monthly system switching tripping operation number of times is: 500*1%=5 time, directly according to supply voltage judgement cable is stolen, monthly occur that erroneous judgement number of times is 5 times, this cannot meet request for utilization in actual use.According to three-phase and four-line road lamp system characteristic, what in operational process, switch trip appearred in not cophase supply branch road simultaneously may be A phase and B phase, B phase and C phase, A phase and C phase, respective combination situation is: C (3, 2)=3, two-phase power supply is the same above-mentioned scale systems of probability r=1%*1%*3 of tripping operation simultaneously, when within one month, the same asynchronism(-nization) of same circuit is identical, occur that switch trip number of times is: simultaneously trip number of times=500*1%*1%*3=0.15 time of two-phase power supply, known according to theory of probability, above-mentioned hypothesis belongs to small probability event, in reality, can not think and can occur, according to homophase supply voltage not, break down judgement cable is stolen there will not be erroneous judgement simultaneously, thereby greatly improve the stolen reliability of cable.
6, integrated 8051 control cores of the CC2430 integrated chip of ZigBee subnet node, belong to high-speed data acquisition and disposal system, in actual use p.s. whole process data processing approximately 1000 times, for this reason, the service cable system of breaking down detects cable fault maximum delay: the stolen detection time delay t1=1 of cable second/1000 time=1 millisecond (cable transmission speed is light velocity c, in this propagation delay time, can ignore), detect cable stolen after, the ZigBee-network active reporting being comprised of CC2430 chip is to PC control core.ZigBee-network agreement support speed is 250KBps at present, after the stolen Information encapsulation of cable, is less than 500 bytes.According to actual road lamp system wiring, the stolen message of cable data routing times in ZigBee-network is not more than 5 times, the stolen information exchange of cable is crossed ZigBee-network and is transferred to control terminal time delay and is: 8/byte of t2=500 byte */250KBps*5 time=80 milliseconds, the stolen information of cable from occurring this information time delay to be detected to host computer control core is: t=t1+t2=1 millisecond+80 millisecond=81 milliseconds.And PC control core sends the time delay of warning message by network operation departmental network situation was relevant at that time by gsm module, generally 5-30 second not etc., consider other factors, whole time delay is no more than 40 seconds.According to road lamp system characteristic, stolen to corresponding information being detected from cable, within 40 seconds, can meet in the very first time and find that cable is stolen, guarantee that loss drops to minimum.
7, beneficial effect: the present invention has the following advantages compared to existing technology, it is antitheft that a kind of road lighting cable theft preventing method based on ZigBee and GSM network of the present invention can be realized round-the-clock 24 hours monitoring cables, terminal voltage monitoring device coordinates with front end power supply, and can solve traditional cable antitheft daytime completely cannot antitheft drawback; In the present invention, adopt ZigBee-network, by CC2430 chip, adopt active reporting mode, realize the stolen information of cable and report in time, improve the stolen information reporting real-time of cable, adopt GSM network, reduce the ZigBee subnet density of deploying to ensure effective monitoring and control of illegal activities, greatly reduce the cost of deploying to ensure effective monitoring and control of illegal activities; The present invention, from detecting principle, reporting a plurality of links such as mode to be optimized processing, greatly improves the stolen alarm reliability of cable and accuracy.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is PC control core texture schematic diagram;
Fig. 3 is the structural representation of ZigBee subnet node;
Fig. 4 is the workflow diagram of antitheft active alarm of the present invention.
As shown in Figure 1, the present embodiment comprises PC control core, GSM transmitter module, ZigBee subnet node and terminal voltage measurement mechanism, PC control core is a single-chip microcomputer that CC2430 is integrated, for receiving the transmission information of ZigBee subnet node, and send alarm by GSM transmitter module, this control core can be to data analysis and storage simultaneously, and is integrated with human-computer interaction module, is convenient to municipal sector abnormal information is checked, analyzed.PC control core belongs to a special joint of ZigBee subnet, can with subnet in any one ZigBee subnet node communication.
ZigBee subnet node forms minimum system by CC2430 chip, except minimum system, terminal voltage measurement mechanism is also installed, be deployed in the end of road lighting cable, terminal voltage measurement mechanism is arranged in any two-phase of street lamp power supply, road lamp power supply cable, and for the information of voltage of real-time detection streamer, the leading portion of road lighting cable is installed direct supply simultaneously, be responsible for the DC voltage of supply cable 48V of idle time of street lamp by day, guarantee that terminal voltage measurement mechanism can realize the round-the-clock monitoring to cable.
As shown in Figure 2, ZigBee subnet node comprises CPU (central processing unit), analog digital modular converter, ZigBee communications gateway module and power supply, above-mentioned each module is connected with CPU (central processing unit), and is powered by power supply (can adopt dry cell or solar cell during practical application).
After above-mentioned each module installs, according to the Z-Stack protocol stack arrangement of ZigBee, form ZigBee subnet, each ZigBee subnet node arranges respectively label (comprising PC control core), once there are abnormal conditions, can be according to reporting abnormal ZigBee subnet node label, determine fast out-of-the way position, and after the CPU (central processing unit) of PC control core is resolved, by gsm module, municipal administration department in time sends a warning message.
Embodiment
Below in conjunction with drawings and Examples, the invention will be further described, but be not limited to this.
Embodiment 1:
The embodiment of the present invention 1 as Figure 1-3, a kind of streetlamp cable anti-theft system based on ZigBee and GSM network, comprise PC control core, ZigBee subnet node, GSM transmitter module and terminal voltage measurement mechanism, it is characterized in that ZigBee subnet node is connected by radio communication with PC control core, terminal voltage measurement mechanism and ZigBee subnet node are integrated and connected and are directly installed on the cable between street lamp, and ZigBee subnet node comprises CPU (central processing unit) and coupled ZigBee communications gateway module; Terminal voltage measurement mechanism comprises data acquisition module and A/D converter, data acquisition module comprises direct current measurement circuit and AC measurment circuit, wherein direct current measurement circuit is comprised of the divider resistance of 1 series connection, and be directly connected with any two-phase of cable and the input end of A/D converter, the output terminal of A/D converter is connected to ZigBee subnet node; AC measurment circuit comprises coupling transformer and rectifier filer, the input end of transformer is directly connected in cable arbitrarily in two-phase, the output terminal of transformer is connected with rectifier filer, the output terminal of rectifier filer is connected with the input end of A/D converter, and the output terminal of A/D converter is connected to ZigBee subnet node; Data acquisition module is connected integrated being installed on road lighting cable with A/D converter and ZigBee subnet node sequence, and is its power supply by the direct supply of installing on road lighting cable; PC control core comprises CPU (central processing unit), data storage cell, GSM transmitter module, ZigBee communications gateway module, human-computer interaction module and power supply, wherein ZigBee communications gateway module is directly integrated in CPU (central processing unit), and CPU (central processing unit) is connected with data storage cell, GSM transmitter module, ZigBee communications gateway module, human-computer interaction module respectively through its I/O interface; Power supply is connected respectively to CPU (central processing unit), data storage cell, GSM transmitter module, ZigBee communications gateway module and human-computer interaction module for its power supply; Human-computer interaction module comprises matrix keyboard and 12864LCD liquid crystal display; Data storage cell comprises SD card, Flash and EEPROM;
The CC2430 chip of described CPU (central processing unit) ShiTI company.
Described GSM transmitter module is used SIM900A integration module.
Embodiment 2:
A road lighting cable theft preventing method based on ZigBee and GSM network, as shown in Figure 4, step is as follows:
1, start, each module initialization, ZigBee subnet node and PC control core power on, each ZigBee subnet node plays ZigBee subnet according to Z-Stack protocol stack arrangement, PC control core is to each ZigBee subnet poll, check whether it all enters normal operating conditions, and be its power supply by the direct supply of installing on road lighting cable daytime;
2, terminal voltage measurement mechanism obtains the voltage parameter of each monitored phase by its data acquisition module BOB(beginning of block), and the voltage parameter of each phase monitoring is sent to ZigBee subnet node through A/D converter;
3, set in advance the upper and lower limit threshold value of road lighting cable voltage, wherein upper limit threshold is 250V, and lower threshold is 180V; Whether the change in voltage that the judgement of ZigBee subnet node receives reaches threshold value, and when lower than 180V or higher than 250V threshold value, by trigger alarm, now decision circuitry cable breaks down;
4, for preventing that wrong report from occurring, system can judge after the stand-by time of 10 seconds whether received change in voltage reaches threshold value, if the change in voltage receiving in 10 seconds that set is outside 180V-250V threshold range, to other ZigBee subnet nodes, send inquiry, otherwise wait for next voltage uploading data;
If 5 other ZigBee subnet node voltages change, also surpass threshold value, reported PC control core;
6, PC control core record breaks down ZigBee subnet node label and time, according to ZigBee subnet node label, resolve ZigBee subnet node location, and to municipal administration department, send warning message by GSM transmitter module, be sent in the warning message when and where cable fault occurs.
Claims (3)
1. the streetlamp cable anti-theft system based on ZigBee and GSM network, comprise PC control core, ZigBee subnet node, GSM transmitter module and terminal voltage measurement mechanism, it is characterized in that ZigBee subnet node is connected by radio communication with PC control core, terminal voltage measurement mechanism and ZigBee subnet node are integrated and connected and are directly installed on the cable between street lamp, and ZigBee subnet node comprises CPU (central processing unit) and coupled ZigBee communications gateway module; Terminal voltage measurement mechanism comprises data acquisition module and A/D converter, data acquisition module comprises direct current measurement circuit and AC measurment circuit, wherein direct current measurement circuit is comprised of the divider resistance of 1 series connection, and be directly connected with any two-phase of cable and the input end of A/D converter, the output terminal of A/D converter is connected to ZigBee subnet node; AC measurment circuit comprises coupling transformer and rectifier filer, the input end of transformer is directly connected in cable arbitrarily in two-phase, the output terminal of transformer is connected with rectifier filer, the output terminal of rectifier filer is connected with the input end of A/D converter, and the output terminal of A/D converter is connected to ZigBee subnet node; Data acquisition module is connected integrated being installed on road lighting cable with A/D converter and ZigBee subnet node sequence, and is its power supply by the direct supply of installing on road lighting cable; PC control core comprises CPU (central processing unit), data storage cell, GSM transmitter module, ZigBee communications gateway module, human-computer interaction module and power supply, wherein ZigBee communications gateway module is directly integrated in CPU (central processing unit), and CPU (central processing unit) is connected with data storage cell, GSM transmitter module, ZigBee communications gateway module, human-computer interaction module respectively through its I/O interface; Power supply is connected respectively to CPU (central processing unit), data storage cell, GSM transmitter module, ZigBee communications gateway module and human-computer interaction module for its power supply; Human-computer interaction module comprises matrix keyboard and 12864LCD liquid crystal display; Data storage cell comprises SD card, Flash and EEPROM;
The CC2430 chip of described CPU (central processing unit) ShiTI company.
2. a kind of streetlamp cable anti-theft system based on ZigBee and GSM network as claimed in claim 1, is characterized in that described GSM transmitter module is used SIM900A integration module.
3. utilize a kind of streetlamp cable anti-theft system based on ZigBee and GSM network described in claim 1 to carry out antitheft method, step is as follows:
1) start, each module initialization, ZigBee subnet node and PC control core power on, each ZigBee subnet node plays ZigBee subnet according to Z-Stack protocol stack arrangement, PC control core is to each ZigBee subnet poll, check whether it all enters normal operating conditions, and be its power supply by the direct supply of installing on road lighting cable daytime;
2) terminal voltage measurement mechanism obtains the voltage parameter of each monitored phase by its data acquisition module BOB(beginning of block), and the voltage parameter of each phase monitoring is sent to ZigBee subnet node through A/D converter;
3) set in advance the upper and lower limit threshold value of road lighting cable voltage, wherein upper limit threshold is 250V, and lower threshold is 180V; Whether the change in voltage that the judgement of ZigBee subnet node receives reaches threshold value, and when lower than 180V or higher than 250V threshold value, by trigger alarm, now decision circuitry cable breaks down;
4) for preventing that wrong report from occurring, system can judge after the stand-by time of 10 seconds whether received change in voltage reaches threshold value, if the change in voltage receiving in 10 seconds that set is outside 180V-250V threshold range, to other ZigBee subnet nodes, send inquiry, otherwise wait for next voltage uploading data;
5) if other ZigBee subnet node voltages change, also surpass threshold value, reported PC control core;
6) PC control core record breaks down ZigBee subnet node label and time, according to ZigBee subnet node label, resolve ZigBee subnet node location, and to municipal administration department, send warning message by GSM transmitter module, be sent in the warning message when and where cable fault occurs.
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| CN104363641A (en) * | 2014-11-20 | 2015-02-18 | 国网重庆市电力公司江北供电分公司 | Power cable anti-theft alarm information low-power-consumption transmission method based on wireless network |
| CN104700538A (en) * | 2014-08-28 | 2015-06-10 | 安徽工程大学 | Aerial cable anti-theft warning device |
| CN107358788A (en) * | 2017-09-13 | 2017-11-17 | 广州市厚德物联科技有限公司 | Power supply cable disconnection monitoring and alarming device based on LoRa technology |
| CN108320426A (en) * | 2017-12-14 | 2018-07-24 | 新疆信息产业有限责任公司 | Electrical load circuit and theft protection for devices linkage and its application method |
| CN112616231A (en) * | 2020-12-17 | 2021-04-06 | 陈迎春 | Fault alarm method, detection alarm device and system for periodic power supply electric appliance |
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- 2014-05-28 CN CN201410230540.9A patent/CN103985240A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104700538A (en) * | 2014-08-28 | 2015-06-10 | 安徽工程大学 | Aerial cable anti-theft warning device |
| CN104363641A (en) * | 2014-11-20 | 2015-02-18 | 国网重庆市电力公司江北供电分公司 | Power cable anti-theft alarm information low-power-consumption transmission method based on wireless network |
| CN104363641B (en) * | 2014-11-20 | 2018-01-12 | 国网重庆市电力公司江北供电分公司 | Power cable burglar alarm information transmission method with low power consumption based on wireless network |
| CN107358788A (en) * | 2017-09-13 | 2017-11-17 | 广州市厚德物联科技有限公司 | Power supply cable disconnection monitoring and alarming device based on LoRa technology |
| CN108320426A (en) * | 2017-12-14 | 2018-07-24 | 新疆信息产业有限责任公司 | Electrical load circuit and theft protection for devices linkage and its application method |
| CN108320426B (en) * | 2017-12-14 | 2024-02-13 | 新疆信息产业有限责任公司 | Power load circuit and equipment anti-theft linkage device and use method thereof |
| CN112616231A (en) * | 2020-12-17 | 2021-04-06 | 陈迎春 | Fault alarm method, detection alarm device and system for periodic power supply electric appliance |
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Application publication date: 20140813 |