CN202904793U - Cable antitheft system based on combination of impedance test and GSM communication - Google Patents

Cable antitheft system based on combination of impedance test and GSM communication Download PDF

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Publication number
CN202904793U
CN202904793U CN 201220627347 CN201220627347U CN202904793U CN 202904793 U CN202904793 U CN 202904793U CN 201220627347 CN201220627347 CN 201220627347 CN 201220627347 U CN201220627347 U CN 201220627347U CN 202904793 U CN202904793 U CN 202904793U
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Prior art keywords
cable
main control
module
control module
terminal
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Expired - Lifetime
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CN 201220627347
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Chinese (zh)
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宋宏伟
卢天华
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ZHEJIANG FANGDA ITES TECHNOLOGY CO LTD
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ZHEJIANG FANGDA ITES TECHNOLOGY CO LTD
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Abstract

The utility model discloses a cable antitheft system based on combination of an impedance test and GSM communication. The system comprises a main control unit and an antitheft end unit which is connected with the main control unit through the cable. The main control unit comprises a main control module, a main communication module, an alternating current/direct current conversion module and an impedance test module. The antitheft end unit comprises an end control module, an end communication module and a voltage detection module. According to the system of the utility model, when the cable is without the alternating current, the impedance between a live wire and a zero line is infinite; and under a power-on situation, the end is with the alternating current; an error is not easy to be generated through using a GSM platform as remote communication; after combining the two characteristics, all-weather monitoring of the cable on a road is fully realized; the structure is simple; problems of misinformation and the like existing in all the antitheft equipment are basically solved.

Description

A kind of cable anti-theft system that combines based on testing impedance and gsm communication
Technical field
The utility model belongs to the cable theft-prevention technical field, is specifically related to a kind of cable anti-theft system that combines based on testing impedance and gsm communication.
Background technology
Believe that people on the market to antitheft not strange, has video antitheft, wireless telecommunications are antitheft, power carrier is antitheft etc. a series of burglary-resisting installation, but mostly all adopted now the antitheft and antitheft two kinds of technology of wireless telecommunications of power line carrier, PLC.
Power line carrier, PLC is antitheft to be transfer instruction on line of electric force, utilizes alternating current as carrier, sends instruction to end from terminal, and end receives after the instruction again passback and replys accordingly instruction and return terminal, judges thus whether cable is complete.The constraint condition that such mode at first is subject to is exactly distance, as everyone knows, the coverage of power line carrier, PLC is only between the 200-300m, after this distance, power line carrier, PLC just can't receive data message, thus many producers all to adopt the mode of relaying to finish antitheft, such shortcoming is exactly the more of relaying use, the effect of signal transmission is poorer, and coverage just will shorten, and cost also will increase substantially; And this method can only just can be finished having to exchange in the energising situation, do not have just can not to finish in the alternating current situation antitheft.
Adopt wireless anti-theft also to be subject to the impact of distance, existing wireless anti-theft circuit maximum distance can only reach in the 500m scope, and has been subject to the mutual interference of on-air radio signal, shine into the signal transmission not smooth, phenomenon very easily occurs reporting by mistake.And in the situation that do not have Alternating Current Power Supply to module, terminal need to be terminal practical for wireless anti-theft from direct current of output in the power distribution cabinet, this method between the lights street lamp is turned on light moment, very easily according to becoming alternating voltage to scurry in the DC power-supply circuit, DC power-supply circuit is burnt, and destroyed theft-proof terminal.
The producer that also has has adopted terminal large inductance short circuit or large capacitance short-circuit, the unexpected variation of electric current on the test cable, and wrong report easily appears in this scheme in the road lighting cable of road is antitheft.Article one, 100 light fixtures are lit a lamp in the situation on the road, and the situation of curent change 4-5 ampere happens occasionally, and therefore the misjudgment of antitheft appearance is higher with these class methods.
Summary of the invention
For the existing above-mentioned technological deficiency of prior art, the utility model provides a kind of cable anti-theft system that combines based on testing impedance and gsm communication, overcome remote transmission signal sensitivity not high, the wrong report phenomenon is frequent, the shortcoming such as the direct current supply security performance is low; Can realize active reporting, accuracy of judgement, rate of false alarm is low.
A kind of cable anti-theft system that combines based on testing impedance and gsm communication comprises: main control unit and the antitheft terminal units that links to each other with main control unit by cable; Wherein:
Described main control unit comprises:
Main control module links to each other with transformation cabinet to cable power transmission;
Main communication module links to each other with main control module;
Hand over straight modular converter, link to each other with cable with main control module;
Impedance test module links to each other with cable with main control module.
The straight modular converter of described friendship is used for gathering voltage cable, and sends detectable voltage signals according to the control signal cable that main control module provides to antitheft terminal units;
Described impedance test module is used for gathering the impedance information on the cable, and offers main control module;
Described main control module is used for by handing over straight modular converter to judge whether alternating current being arranged on the cable, if do not have, then to handing over straight modular converter to transmit control signal; The impedance information that simultaneously impedance test module is collected is judged, and is sent alerting signal according to judged result to main communication module;
The alerting signal that described main communication module is used for providing according to main control module sends warning message to the user.
Described antitheft terminal units comprises:
Terminal control module;
Terminal communication module links to each other with terminal control module;
Voltage detection module links to each other with cable with terminal control module.
Described voltage detection module is used for gathering voltage cable and detectable voltage signals, and according to the control signal that terminal control module provides cable live wire and zero line is connected by resistance;
Described terminal control module is used for judging by voltage detection module whether alternating current is arranged on the cable, if do not have, then judge whether to receive detectable voltage signals by voltage detection module, and transmit control signal or terminad communication module transmission alerting signal to voltage detection module according to judged result;
The alerting signal that described terminal communication module is used for providing according to terminal control module sends warning message to main communication module.
The straight modular converter of described friendship is comprised of resistance R 1 and relay J 1; Wherein, one end of relay J 1 normally opened contact links to each other with an end of resistance R 1 and connects main control module, another termination supply voltage of resistance R 1, another terminated cable live wire of relay J 1 normally opened contact, the coil of relay J 1 is by the control signal control power on/off of main control module.
Described voltage detection module is comprised of resistance R 2 and relay J 2; Wherein, one end of relay J 2 normally opened contacts links to each other with an end of resistance R 2 and connects terminal control module, another terminated cable live wire of resistance R 2, another termination zero in cable line of relay J 2 normally opened contacts, the coil of relay J 2 is by the control signal control power on/off of terminal control module.
Described impedance test module is comprised of two phase inverter INV1~INV2; Wherein, the input terminated cable live wire of phase inverter INV1, the output terminal of phase inverter INV1 links to each other with the input end of phase inverter INV2, and the output terminal of phase inverter INV2 links to each other with main control module.
Described main control module is connected with the warning indicating module, and its alerting signal that is used for receiving main control module and provides is implemented the flicker warning.
Described main communication module and terminal communication module all adopt GSM (global system for mobile communications) communication module.
Described main control module and terminal control module all adopt MCU.
Principle of work of the present utility model is:
In electrical network no power situation, the detectable voltage signals that main control unit of antitheft terminal units detection transmits, when detecting this voltage signal, the gsm communication module of antitheft terminal units does not provide warning message, and antitheft terminal units is connected in parallel to a low resistance on the cable by relay simultaneously.Main control unit is by the detectable voltage signals of transmission, test cable impedance data; When cable at random just disconnects from the centre, the low resistance of antitheft terminal units also disconnects simultaneously, and it is large that the cable resistance that main control unit detects just becomes, and determines impedance data after repeating to judge, assert that cable is stolen, then main control unit sends warning message to subscriber equipment by the gsm communication module.When cable was not stolen, main control unit was in the impedance detection state all the time in the cold situation of electrical network.
In electrical network energising situation, antitheft terminal units disconnects low resistance by relay, and circuit conversion becomes the test terminal voltage.When antitheft terminal units detected voltage cable, the gsm communication module did not provide warning message to subscriber equipment.When cable disconnects, antitheft end will can't detect voltage cable, detect the detectable voltage signals that main control unit transmits this moment, after not detecting this voltage signal, the gsm communication module of antitheft terminal units just sends warning message to main control unit, it is to have in the situation that alternating current exists at this moment that main control unit detects, and sends warning message to subscriber equipment by the gsm communication module of main control unit.
The utility model has utilized cable in indirect current situation not, impedance between live wire and the zero line is infinitely-great characteristics, and in the energising situation, the terminal characteristic that must have alternating current, utilize the GSM platform not to be prone to wrong advantage as telecommunication, both are carried out combination, realized fully the round-the-clock monitoring of cable on the road; And simple in structure, substantially solve the phenomenons such as wrong report that all burglary-resisting installations exist.
Description of drawings
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the execution schematic flow sheet of main control unit.
Fig. 3 is the execution schematic flow sheet of antitheft terminal units.
Embodiment
In order more specifically to describe the utility model, below in conjunction with the drawings and the specific embodiments the technical solution of the utility model and principle of work thereof are elaborated.
As shown in Figure 1, a kind of cable anti-theft system that combines based on testing impedance and gsm communication comprises: main control unit and the antitheft terminal units that links to each other with main control unit by cable; Wherein:
Main control unit comprises main control module, main communication module, hands over straight modular converter, warning indicating module and impedance test module; Wherein:
Hand over straight modular converter to link to each other with cable with main control module, it is used for gathering voltage cable, and sends detectable voltage signals according to the control signal cable that main control module provides to antitheft terminal units; In the present embodiment, hand over straight modular converter to be formed by resistance R 1 and relay J 1; Wherein, one end of relay J 1 normally opened contact links to each other with an end of resistance R 1 and connects main control module, another termination supply voltage of resistance R 1, another terminated cable live wire of relay J 1 normally opened contact, the coil of relay J 1 is by the control signal control power on/off of main control module.
Main communication module links to each other with main control module, and its alerting signal that is used for providing according to main control module sends warning message to the user, and receives the warning message that antitheft terminal units sends; In the present embodiment, it is the gsm communication chip module of JNFT-F2308 (Beijing westernization instrument) that main communication module adopts model.
Impedance test module links to each other with cable with main control module, and it is used for gathering the impedance information on the cable, and offers main control module; In the present embodiment, impedance test module is comprised of two phase inverter INV1~INV2; Wherein, the input terminated cable live wire of phase inverter INV1, the output terminal of phase inverter INV1 links to each other with the input end of phase inverter INV2, and the output terminal of phase inverter INV2 links to each other with main control module.
Main control module links to each other with transformation cabinet, and it is used for by handing over straight modular converter to judge whether alternating current being arranged on the cable, if do not have, then to handing over straight modular converter to transmit control signal; The impedance information that simultaneously impedance test module is collected is judged, and is sent alerting signal according to judged result to main communication module and warning indicating module; In the present embodiment, main control module adopts the STM32F103 Series MCU of ST company.
The alerting signal that the warning indicating module is used for receiving main control module and provides is implemented the flicker warning, and it is realized by a LED light.
Antitheft terminal units comprises terminal control module, terminal communication module and voltage detection module; Wherein:
Voltage detection module links to each other with cable with terminal control module, and it is used for gathering voltage cable and detectable voltage signals, and according to the control signal that terminal control module provides cable live wire and zero line is connected by resistance; In the present embodiment, voltage detection module is comprised of resistance R 2 and relay J 2; Wherein, one end of relay J 2 normally opened contacts links to each other with an end of resistance R 2 and connects terminal control module, another terminated cable live wire of resistance R 2, another termination zero in cable line of relay J 2 normally opened contacts, the coil of relay J 2 is by the control signal control power on/off of terminal control module.
Terminal communication module links to each other with terminal control module, and its alerting signal that is used for providing according to terminal control module sends warning message to main communication module; In the present embodiment, it is the gsm communication chip module of JNFT-F2308 (Beijing westernization instrument) that terminal communication module adopts model.
Terminal control module is used for judging by voltage detection module whether alternating current is arranged on the cable, if do not have, then judge whether to receive detectable voltage signals by voltage detection module, and transmit control signal or terminad communication module transmission alerting signal to voltage detection module according to judged result; In the present embodiment, main control module adopts the STM32F103 Series MCU of ST company.
As shown in Figures 2 and 3, present embodiment is in electrical network no power situation, the detectable voltage signals that main control unit of antitheft terminal units detection transmits, when detecting this voltage signal, the gsm communication module of antitheft terminal units does not provide warning message, and antitheft terminal units is connected in parallel to a low resistance on the cable by relay.Main control unit is by the detectable voltage signals of transmission, test cable impedance data; When cable at random just disconnects from the centre, the low resistance of antitheft terminal units also disconnects simultaneously, and it is large that the cable resistance that main control unit detects just becomes, and determines impedance data after repeating to judge, assert that cable is stolen, then main control unit sends warning message to subscriber equipment by the gsm communication module.When cable was not stolen, main control unit was in the impedance detection state all the time in the cold situation of electrical network.
In electrical network energising situation, antitheft terminal units disconnects low resistance by relay, and circuit conversion becomes the test terminal voltage.When antitheft terminal units detected voltage cable, the gsm communication module did not provide warning message to subscriber equipment; When cable disconnects, antitheft end will can't detect voltage cable, detect the detectable voltage signals that main control unit transmits this moment, after not detecting this voltage signal, the gsm communication module of antitheft terminal units just sends warning message to main control unit, main control unit detected transformation cabinet and truly had to cable power supply this moment, sent warning message to subscriber equipment by the gsm communication module of main control unit.

Claims (7)

1. a cable anti-theft system that combines based on testing impedance and gsm communication comprises main control unit and the antitheft terminal units that links to each other with main control unit by cable; It is characterized in that:
Described main control unit comprises:
Main control module links to each other with transformation cabinet to cable power transmission;
Main communication module links to each other with main control module;
Hand over straight modular converter, link to each other with cable with main control module;
Impedance test module links to each other with cable with main control module;
Described antitheft terminal units comprises:
Terminal control module;
Terminal communication module links to each other with terminal control module;
Voltage detection module links to each other with cable with terminal control module.
2. cable anti-theft system according to claim 1, it is characterized in that: the straight modular converter of described friendship is comprised of resistance R 1 and relay J 1; Wherein, one end of relay J 1 normally opened contact links to each other with an end of resistance R 1 and connects main control module, another termination supply voltage of resistance R 1, another terminated cable live wire of relay J 1 normally opened contact, the coil of relay J 1 is by the control signal control power on/off of main control module.
3. cable anti-theft system according to claim 1, it is characterized in that: described voltage detection module is comprised of resistance R 2 and relay J 2; Wherein, one end of relay J 2 normally opened contacts links to each other with an end of resistance R 2 and connects terminal control module, another terminated cable live wire of resistance R 2, another termination zero in cable line of relay J 2 normally opened contacts, the coil of relay J 2 is by the control signal control power on/off of terminal control module.
4. cable anti-theft system according to claim 1, it is characterized in that: described impedance test module is comprised of two phase inverter INV1~INV2; Wherein, the input terminated cable live wire of phase inverter INV1, the output terminal of phase inverter INV1 links to each other with the input end of phase inverter INV2, and the output terminal of phase inverter INV2 links to each other with main control module.
5. cable anti-theft system according to claim 1, it is characterized in that: described main control module is connected with the warning indicating module.
6. cable anti-theft system according to claim 1, it is characterized in that: described main communication module and terminal communication module all adopt the gsm communication module.
7. cable anti-theft system according to claim 1, it is characterized in that: described main control module and terminal control module all adopt MCU.
CN 201220627347 2012-11-22 2012-11-22 Cable antitheft system based on combination of impedance test and GSM communication Expired - Lifetime CN202904793U (en)

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Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104700540A (en) * 2015-03-26 2015-06-10 南京秦之邦科技有限公司 Dynamic relay type cable stealing preventing system
CN105067892A (en) * 2015-09-22 2015-11-18 浙江方大智控科技有限公司 Cable impedance detection circuit
CN105118214A (en) * 2015-09-22 2015-12-02 浙江方大智控科技有限公司 Cable antitheft system and corresponding cable antitheft method
CN105354962A (en) * 2015-10-30 2016-02-24 长沙星联电力自动化技术有限公司 Self-adaptive cable antitheft device and method
CN106297113A (en) * 2015-06-04 2017-01-04 五冶集团上海有限公司 Novel cable burglar alarm based on GSM
CN108470414A (en) * 2018-05-31 2018-08-31 深圳市中科智联科技有限公司 Cable anti-theft device and system
CN110728816A (en) * 2019-11-14 2020-01-24 上海东捷建设(集团)有限公司 Cable anti-theft system and method

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104700540A (en) * 2015-03-26 2015-06-10 南京秦之邦科技有限公司 Dynamic relay type cable stealing preventing system
CN106297113A (en) * 2015-06-04 2017-01-04 五冶集团上海有限公司 Novel cable burglar alarm based on GSM
CN106297113B (en) * 2015-06-04 2019-03-15 五冶集团上海有限公司 Anti-theft alarm for cable based on GSM
CN105067892A (en) * 2015-09-22 2015-11-18 浙江方大智控科技有限公司 Cable impedance detection circuit
CN105118214A (en) * 2015-09-22 2015-12-02 浙江方大智控科技有限公司 Cable antitheft system and corresponding cable antitheft method
CN105354962A (en) * 2015-10-30 2016-02-24 长沙星联电力自动化技术有限公司 Self-adaptive cable antitheft device and method
CN108470414A (en) * 2018-05-31 2018-08-31 深圳市中科智联科技有限公司 Cable anti-theft device and system
CN110728816A (en) * 2019-11-14 2020-01-24 上海东捷建设(集团)有限公司 Cable anti-theft system and method

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