CN111307219A - Grounding circulation on-line monitoring system with active anti-theft and high-speed wireless transmission - Google Patents
Grounding circulation on-line monitoring system with active anti-theft and high-speed wireless transmission Download PDFInfo
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- CN111307219A CN111307219A CN202010266108.0A CN202010266108A CN111307219A CN 111307219 A CN111307219 A CN 111307219A CN 202010266108 A CN202010266108 A CN 202010266108A CN 111307219 A CN111307219 A CN 111307219A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B13/00—Burglar, theft or intruder alarms
- G08B13/16—Actuation by interference with mechanical vibrations in air or other fluid
- G08B13/1654—Actuation by interference with mechanical vibrations in air or other fluid using passive vibration detection systems
- G08B13/169—Actuation by interference with mechanical vibrations in air or other fluid using passive vibration detection systems using cable transducer means
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/18—Status alarms
- G08B21/182—Level alarms, e.g. alarms responsive to variables exceeding a threshold
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/04—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for transformers
- H02H7/042—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for transformers for current transformers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/12—Messaging; Mailboxes; Announcements
- H04W4/14—Short messaging services, e.g. short message services [SMS] or unstructured supplementary service data [USSD]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/30—Services specially adapted for particular environments, situations or purposes
- H04W4/38—Services specially adapted for particular environments, situations or purposes for collecting sensor information
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- Burglar Alarm Systems (AREA)
Abstract
The invention provides a grounding circulation on-line monitoring system with active anti-theft and high-speed wireless transmission, which comprises a grounding circulation monitoring host A, a current transformer a, a temperature sensor B, a vibration sensor C, an acousto-optic alarm module B and a 4G high-speed wireless transmission module C, wherein the current transformer a is connected with the grounding circulation monitoring host A through a wireless transmission network; the three current transformers a are respectively arranged on A, B, C three-phase cable middle joint grounding wires, the three temperature sensors B are respectively arranged on A, B, C three-phase cable middle joint grounding wires, the four vibration sensors c are respectively arranged on A, B, C three-phase cable middle joint grounding wires and grounding wires, and the sound-light alarm module B is arranged beside the grounding circulation monitoring host A. The invention has active anti-theft function, prevents the situation that the grounding wire or the grounding wire is cut by theft, and has low manufacturing cost, small volume and easy integration.
Description
Technical Field
The invention relates to the technical field of cable body monitoring, in particular to a grounding circulation on-line monitoring system with active anti-theft and high-speed wireless transmission functions.
Background
In recent years, the economy of China continues to increase, the urban power grid develops rapidly, and the requirements of modern society on power supply safety and reliability are increasingly highlighted. The power cable is the most important part in the power supply link of a power grid, belongs to national important infrastructure facilities, plays an important role in promoting the social and economic development of China, and is always important to the safe operation. Meanwhile, the cable laid in the early stage is continuously used for a normal service life, the insulation problem of the cable is increasingly aggravated, and more than 90% of the problem of the power cable is solved at the position of the middle joint according to statistics. In addition, due to insufficient artificial supervision, the situation that the grounding wire of the power cable is artificially stolen and cut occurs occasionally, and the damage of the grounding system of the high-voltage cable can lead the sheath to bear high voltage for a long time, so that the service life of the cable is greatly reduced, and the occurrence rate of high-voltage cable accidents is greatly improved. Therefore, a complete cable performance monitoring system is required for the power system, and particularly, the position of the middle joint of the cable is monitored.
There are many on-line monitoring devices for ground circulation monitoring the performance of cable intermediate joint position in the market, but most of them transmit data in wired transmission mode or wireless transmission mode with low speed. When the data is transmitted in a wired mode, communication cables need to be laid on the implementation site, so that the construction cost is greatly increased, and the project construction period is prolonged; when the wireless transmission mode is adopted, a wireless transmission system is basically formed by the UART of the MCU A1 and the wireless communication module, and the mode greatly limits the data transmission rate and has extremely low efficiency. In addition, the existing monitoring device basically has no active anti-theft function, cannot effectively protect the power cable intermediate joint, and has large volume and high manufacturing cost.
Disclosure of Invention
The object of the present invention is to solve at least one of the technical drawbacks mentioned.
Therefore, the invention aims to provide a grounding circulation on-line monitoring system with active anti-theft and high-speed wireless transmission, which has an active anti-theft function, prevents the grounding wire or the ground wire from being stolen and cut, and has the advantages of low manufacturing cost, small volume and easy integration.
In order to achieve the aim, the invention provides a grounding circulation on-line monitoring system with active anti-theft and high-speed wireless transmission, which comprises a grounding circulation monitoring host, a current transformer, a temperature sensor, a vibration sensor, an audible and visual alarm module and a 4G high-speed wireless transmission module, wherein the current transformer is connected with the grounding circulation monitoring host; the grounding circulation monitoring host is arranged near a grounding wire of a middle joint of the power cable, and is provided with three current transformers which are respectively arranged on a grounding wire of a middle joint of an A, B, C three-phase cable and connected with the grounding circulation monitoring host through connectors; the grounding circulation monitoring host is provided with three temperature sensors, the three temperature sensors are respectively arranged on the A, B, C three-phase cable intermediate joint grounding wire and are connected with the grounding circulation monitoring host through connectors; the grounding circulation monitoring host A is provided with four vibration sensors which are respectively arranged on a grounding wire and a grounding wire of an intermediate joint of an A, B, C three-phase cable and are connected with the grounding circulation monitoring host through connectors; the sound and light alarm modules are arranged beside the grounding circulation monitoring host and are placed in the anti-disassembly junction box together, and the grounding circulation monitoring host is provided with the sound and light alarm modules which are connected with the grounding circulation monitoring host through signal lines. The 4G high-speed wireless transmission module is arranged beside the grounding circulation monitoring host and is placed in the anti-dismantling junction control box together, and each grounding circulation monitoring host is provided with one 4G high-speed wireless transmission module which is connected with the grounding circulation monitoring host through a connector.
In any of the above aspects, it is preferable that the number of the ground circulation monitoring main units is plural, and each ground circulation monitoring main unit is installed at a ground line of each power cable intermediate joint.
In any of the above schemes, preferably, the current transformer is of a snap-in structure, and during installation, the mechanical snap is opened, sleeved on the grounding cable, and then the mechanical snap is closed.
In any of the above schemes, preferably, the temperature sensor is a structure in which a signal line is connected with a metal temperature probe, when the temperature sensor is installed, the metal temperature probe is placed on a grounding cable, the temperature probe is attached to the grounding cable by using heat-conducting silicone grease and isolated from the ambient temperature, and finally, the outermost layer is wrapped by using a special fireproof blanket.
In any of the above schemes, preferably, the vibration sensor is a structure in which a signal wire is connected with a metal vibration probe, and when the vibration sensor is installed, the metal vibration probe is placed on a grounding cable, and then the outermost layer is wrapped by a special fireproof blanket; in real-time fire blanket wrapping, the temperature sensor b and the vibration sensor can be wrapped together.
In any of the above schemes, preferably, the ground circulating current monitoring host includes an electric energy quality chip, an MCU, an acousto-optic alarm module power control circuit, a temperature detection dedicated circuit, and a vibration detection isolation circuit, the electric energy quality chip is connected with three current transformers respectively, the electric energy quality chip is further connected with the MCU, the MCU is connected with the acousto-optic alarm module power control circuit, the temperature detection dedicated circuit, and the vibration detection isolation circuit, the temperature detection dedicated circuit is connected with three temperature sensors, the vibration detection isolation circuit is connected with four vibration sensors, the acousto-optic alarm module power control circuit is connected with the acousto-optic alarm module, and the MCU is further connected with a 4G high-speed wireless transmission module.
In any of the above schemes, preferably, four vibration sensors are used for detecting A, B, C whether the three-phase cable middle joint connecting wires and the ground wires are stolen or not, when the stealing and cutting alarm occurs, the vibration sensors reverse the level of output signals and output the signals to the vibration detection isolation circuit, and then the vibration detection isolation circuit transmits detection signals to the MCU.
In any of the above schemes, preferably, the 4G high-speed wireless transmission module is further in remote communication with an external remote background; the 4G high-speed wireless transmission module is a multi-mode 4G module and at least supports high-speed access of 2G, 3G and 4G networks of any one of mobile, communication and telecommunication; the SMS short message receiving and sending and short message configuration functions are supported; supporting a USIM card, an APN special card and an Internet of things card of the mobile phone; supporting FOTA differential upgrade; supporting FTP other upgrades.
The invention also provides a monitoring method based on the grounding loop current online monitoring system with active anti-theft and high-speed wireless transmission, which comprises the following steps:
step S1, after the system is powered on, the grounding circulation monitoring host, the sound-light alarm module and the 4G high-speed wireless transmission module perform power-on self-detection;
step S2, the grounding circulation monitoring host machine acquires current data of three current transformers respectively arranged on connecting wires of the middle joints of A, B, C three-phase cables through a power quality chip, acquires temperature data of three temperature sensors respectively arranged on connecting wires of the middle joints of A, B, C three-phase cables through a special temperature detection circuit, and acquires state data of four vibration sensors respectively arranged on connecting wires of the middle joints of A, B, C three-phase cables and a ground wire through a vibration detection isolation circuit;
step S3, the grounding circulation monitoring host machine compares the acquired data with the user parameters, if the data exceeds the set threshold, the grounding circulation monitoring host machine generates alarm information immediately and gives an alarm;
step S4, the grounding circulation monitoring host compares the acquired data with the user parameters, if the data does not exceed the set threshold, no alarm information is generated, but the real-time data is stored in the local memory;
step S5, after the grounded loop current monitoring host receives the request instruction from the remote background through the 4G high-speed transmission module, the data is verified and analyzed according to the protocol, and then corresponding action is taken according to the specific instruction.
In any of the above schemes, preferably, in step S3, there are three types of alarms, one is that the current is abnormal, and when the detected current value exceeds the threshold set by the user, the abnormal state is actively reported to the remote background through the 4G high-speed wireless transmission module, and the field responsible person is notified of the abnormal state by a short message; secondly, temperature is abnormal, when the detected temperature value exceeds a threshold value set by a user, an abnormal state is actively reported to a remote background through a 4G high-speed wireless transmission module, and field responsible personnel are informed of checking the abnormal state in the field through short messages; thirdly, vibration is abnormal, when the state data of the vibration sensor is detected to exceed a threshold set by a user, the abnormal state is actively reported to a far-end background through a 4G high-speed wireless transmission module, field responsible personnel are informed of checking the abnormal state in the field through short messages, and meanwhile, an audible and visual alarm module is started to warn a thief; when any abnormality occurs, real-time data and alarm information when an alarm occurs are stored in the local memory at the same time of alarming.
The grounding circulation on-line monitoring system with active anti-theft and high-speed wireless transmission has the following beneficial effects:
1. the invention adopts a 4G high-speed wireless transmission mode to replace a wired communication mode, thereby greatly reducing the field construction difficulty and the construction cost and shortening the project implementation period.
2. The invention replaces the common wireless communication mode with the 4G high-speed wireless transmission mode, greatly improves the data transmission efficiency and improves the real-time property.
3. The invention realizes an active anti-theft function by using a vibration sensor, a sound-light alarm module, a 4G high-speed wireless transmission module and an anti-dismantling control box, and prevents the situation that a grounding wire or a ground wire is stolen.
4. The invention has small volume and low manufacturing cost, adopts a modularized structure, divides the whole circuit structure into a plurality of small independent and interactive modules, and is convenient for reuse, upgrade, maintenance and disassembly, recovery and treatment after the product is abandoned.
5. The current transformer protection circuit is arranged for protecting the current transformer, so that the service life of the current transformer is prolonged.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic structural view of the present invention;
fig. 2 is a block diagram of the structure of the grounded circulating current monitoring host of the present invention;
FIG. 3 is a schematic view of the installation of the sensor of the present invention on a grounded cable;
FIG. 4 is a circuit schematic of the MCU of the present invention;
FIG. 5 is a circuit schematic of the power quality chip of the present invention;
FIG. 6 is a flow chart of the operation of the system of the present invention;
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
The invention provides a grounding loop current online monitoring system with active anti-theft and high-speed wireless transmission, which comprises a grounding loop current monitoring host A, a current transformer a, a temperature sensor B, a vibration sensor C, an audible and visual alarm module B and a 4G high-speed wireless transmission module C, wherein the grounding loop current monitoring host A is connected with the current transformer a through a wireless transmission line; the grounding circulation monitoring host A is arranged near a grounding wire of a middle joint of a power cable, the grounding circulation monitoring host A is provided with three current transformers a, the three current transformers a are respectively arranged on A, B, C three-phase cable middle joint grounding wires, and the three current transformers a are connected with the grounding circulation monitoring host A through connectors; the grounding circulation monitoring host A is provided with three temperature sensors b, the three temperature sensors b are respectively installed on A, B, C three-phase cable intermediate joint grounding wires, and the three temperature sensors b are connected with the grounding circulation monitoring host A through connectors; the grounding circulation monitoring host A is provided with four vibration sensors c which are respectively arranged on a grounding wire and a grounding wire of an intermediate joint of an A, B, C three-phase cable and are connected with the grounding circulation monitoring host A through connectors; the sound and light alarm modules B are arranged beside the grounding circulation monitoring host A and are placed in the anti-disassembly junction box E together, and the grounding circulation monitoring host A is provided with the sound and light alarm modules B which are connected with the grounding circulation monitoring host A through signal lines. The 4G high-speed wireless transmission module C is installed beside the grounding circulation monitoring host A and is placed inside the disassembly-prevention convergence control box E together, and each grounding circulation monitoring host A is provided with one 4G high-speed wireless transmission module C which is connected with the grounding circulation monitoring host A through a connector.
When the grounding circulation monitoring host machine A works, current data of three current transformers respectively arranged on A, B, C three-phase cable intermediate connector connecting wires are obtained through a power quality chip, temperature data of three temperature sensors respectively arranged on A, B, C three-phase cable intermediate connector connecting wires are obtained through a special temperature detection circuit, and state data of four vibration sensors respectively arranged on A, B, C three-phase cable intermediate connector connecting wires and a ground wire are obtained through a vibration detection isolation circuit; and comparing the acquired data with the user parameters, and if the data exceeds a set threshold, generating alarm information immediately and giving an alarm.
The current transformer a mainly has the function of converting large primary side current into small secondary side current as a signal which can be processed by the grounding circulation monitoring host A. The rated capacity is 10VA, the rated voltage is 3KV, the accuracy is 0.1 grade, and the transformation ratio is 500:1 or 1000: 1.
The temperature sensor b is a three-wire system PT 1000. The three-wire system PT1000 is matched with a signal processing circuit of the grounding circulation on-line monitoring system for use, so that the influence of lead resistance can be better eliminated. The temperature detection range is-70 ℃ to 500 ℃, and the precision is 0.1. When the temperature sensor b is installed, the metal probe is wrapped on the grounding wire of the power cable intermediate joint by adopting heat-conducting silicone grease, and the metal probe is isolated from the ambient temperature, so that the accuracy of temperature acquisition is ensured.
The main function of the vibration sensor c is to detect A, B, C whether the three-phase cable intermediate head connecting wire and the ground wire itself is stolen or not, when the stealing and cutting alarm occurs, the vibration sensor reverses the level of the output signal and outputs the signal to the vibration detection isolation circuit, and then the vibration detection isolation circuit transmits the detection signal to the MCU. The speed measurement is 0-200mm/s, the displacement is 0-2000um, the acceleration measurement is 0-50g, the speed and displacement frequency response is 10-1000Hz, the acceleration frequency response is 2-2000Hz, and the precision is 5%.
The sound-light alarm module B is an alarm integrating voice and an alarm lamp, the power of the whole alarm is 23W, the working voltage can be DC12V/24V or AC 220V/380V, the decibel of a loudspeaker is 110dB, the color of the alarm lamp can be selected, and the alarm tone is public security and supports voice setting.
The 4G high-speed wireless transmission module is also in remote communication with an external far-end background; the 4G high-speed wireless transmission module is a multi-mode 4G module and at least supports high-speed access of 2G, 3G and 4G networks of any one of mobile, communication and telecommunication; the SMS short message receiving and sending and short message configuration functions are supported; supporting a USIM card, an APN special card and an Internet of things card of the mobile phone; supporting FOTA differential upgrade; supporting FTP other upgrades.
The grounding circulation monitoring host A mainly has the functions of signal processing, abnormity alarming, active burglary prevention, data storage, parameter configuration and wireless communication.
1) Signal processing: the signals to be processed include four signals, namely a signal of a current transformer a, a signal of a temperature sensor b, a signal of a vibration sensor C and data of a wireless transmission module C. Current transformer a signal processing unit comprises a special measurement chip A2 of multi-functional high accuracy three-phase electric energy and MCU A1 two parts, adopts SPI to communicate between the two, and current transformer a's input signal is connected to special measurement chip A2 of three-phase electric energy behind preceding stage isolation circuit, and this chip can accurately calculate input current value to give MCU A1 with data transfer through the SPI interface. The signal processing unit of the temperature sensor b consists of a special circuit A4 and an MCU A1, the input signal of the temperature sensor b is isolated by the special circuit, is subjected to differential amplification, is converted into an analog signal which can be identified by the MCU A1, and is subjected to AD conversion to calculate a temperature value. The signal processing unit of the vibration sensor c consists of an isolation circuit A5 and an MCU A1, wherein the signal of the vibration sensor c is a switching digital signal, and is connected to the input IO of the MCU A1 after passing through the isolation circuit A5. The data processing unit of the wireless transmission module C is independently composed of the MCU A1, and the data of the wireless transmission module C is transmitted to the MCU A1 through the USB interface, and vice versa.
2) And (4) abnormal alarming: and comparing the calculation result of the signal processing unit with the parameter value set by the user, if the data is monitored to be abnormal, generating alarm information immediately, reporting the alarm information to a far-end background D, and notifying a corresponding responsible person to the site for examination and maintenance by a short message.
3) Active anti-theft: according to the input state of the vibration sensor c signal processing unit, when the input is abnormal, the situation that the ground wire stealing alarm occurs is considered, the sound-light alarm module B is immediately triggered to work, and a short message is sent in time to inform field responsibility personnel to go to check.
4) Data storage: the data to be stored are three, firstly, the real-time data is calculated by the signal processing unit, and the data can be stored in the storage unit for later viewing, so that the data volume of at least one month can be stored; secondly, abnormal alarm information is obtained, and the data of the abnormal alarm information is also stored in a storage unit as real-time data for subsequent checking, so that the data volume of at least one month can be stored; and finally, system parameters and user parameters, wherein the system parameters comprise a local IP address of the equipment, a port number, a remote background DIP address, a port number and a protocol type, and the user parameters comprise a transformation ratio of a current transformer, a data acquisition period, a current alarm threshold, a temperature alarm threshold and a telephone number of a person responsible for the site.
5) Parameter configuration: the 4G wireless transmission module C can receive the configuration parameters sent by the remote background D and transmit the configuration parameters to the MCU A1, the MCU A1 verifies and verifies the parameters, the reset equipment runs according to the new parameters after the parameters are confirmed to be error-free, and the new parameters are updated to the data storage unit.
6) Wireless communication: the wireless communication realization function is mainly that an instruction of a remote background D request data is received and returned to the real-time data or historical data obtained by calculation and analysis of the signal processing unit; actively reporting alarm information to a far-end background D; actively sending an alarm short message to a field responsible person; and receiving a parameter configuration instruction of the far-end background D, and returning an instruction configuration result.
As shown in fig. 2, the ground loop current monitoring host a includes a power quality chip a2, an MCU a1, an acousto-optic alarm module power control circuit A3, a temperature detection dedicated circuit a4, and a vibration detection isolation circuit A5, where the power quality chip a2 is connected to three current transformers (a1-A3), the power quality chip a2 is further connected to an MCU a1, the MCU a1 is connected to the acousto-optic alarm module power control circuit A3, the temperature detection dedicated circuit a4, and the vibration detection isolation circuit A5, the temperature detection dedicated circuit a4 is connected to three temperature sensors (B1-B3), the vibration detection isolation circuit is connected to four vibration sensors (C1-C4), the acousto-optic alarm module power control circuit A3 is connected to an acousto-optic alarm module B, and the MCU is further connected to a 4G high-speed wireless transmission module C.
The power module F supports DC12V or 24V, AC 220V as a power supply mode, is an optional module and can meet power supply requirements in different occasions. The special chip A2 for power quality is used for processing signals from the current transformer a, can process the signals internally and directly output a calculation result, does not need the participation of the MCU A1, and the MCU A1 obtains the result only through the SPI. The vibration detection isolation circuit A5 can isolate the output signal of the vibration sensor c from the GPIO of the MCU A1, and the safety and stability of the device are guaranteed. The function of the acousto-optic alarm module B power supply control circuit is to control the power supply of the acousto-optic alarm module B, and the acousto-optic alarm module B works when being electrified, so that the acousto-optic alarm module B is controlled by adopting a mode of controlling the power supply, and the acousto-optic alarm module B is simple and convenient. The special interface for 4G high-speed wireless transmission is a USB2.0 interface of the MCU A1, can effectively match the transmission rate of the 4G high-speed wireless transmission module C, and realizes the high-speed transmission of data
As shown in fig. 3, it is explained how the current transformer a, the temperature sensor b, and the vibration sensor c are mounted on the ground cable d. For the convenience of installation and disassembly, the current transformer a is of a buckle type structure, and during installation, a mechanical buckle is opened and sleeved on the grounding cable d, and then the mechanical buckle is closed. In order to improve the detection precision of the temperature sensor b, the temperature sensor b is in a structure that a signal wire is connected with a metal temperature probe, when the temperature sensor b is installed, the temperature probe is placed on a grounding cable d, the temperature probe is attached to the grounding cable by using heat-conducting silicone grease and isolated from the environment temperature, and finally the outermost layer is wrapped by using a special fireproof blanket, so that the accuracy and the safety of temperature collection are further improved. In order to improve the detection accuracy of the vibration sensor c, the vibration sensor c is in a structure that a signal wire is connected with a metal temperature probe, and when the vibration sensor c is installed, the vibration probe is placed on the grounding cable d and then the outermost layer of the vibration probe is wrapped by a special fireproof blanket. In real-time fire blanket wrapping, temperature sensor b and vibration sensor c may be wrapped together.
As shown in fig. 5, the power quality chip a2 is preferably a chip of ATT7022EU type, the power quality chip a2 is further connected to a crystal oscillator circuit and a three-way current transformer protection circuit, the current transformer protection circuit includes a pull-up resistor, a ground capacitor and a protection resistor, the power quality chip a2 is connected to a current transformer through the protection resistor, and the power quality chip a2 is further connected to the pull-up resistor and the ground capacitor, respectively.
In another embodiment of the invention, in order to further improve the anti-theft effect, the lock of the anti-theft collection and control box E is formed by locking a special lock, and a power module F, a grounding circulation monitoring host A, an acousto-optic alarm module B and a 4G high-speed wireless transmission module C are arranged in the lock. The position of the sound-light alarm module B of the anti-theft control box E is designed into a grid shape, so that the sound and the alarm lamp signal can be effectively transmitted. An antenna interface is reserved at the position of the 4G high-speed wireless transmission module C of the convergence control box E, so that 4G signal transmission can be ensured. The anti-theft control box E can prevent a thief from cutting off the power supply F and damaging the monitoring host A, the sound-light alarm module B or the 4G high-speed wireless transmission module C.
The invention replaces the wired communication mode with the 4G high-speed wireless transmission mode, thereby greatly reducing the difficulty and the construction cost of site construction and shortening the project implementation period; the 4G high-speed wireless transmission mode is used for replacing a common wireless communication mode, so that the data transmission efficiency is greatly improved, and the real-time performance is improved; the mode of using the vibration sensor C, the acousto-optic alarm module B, the 4G high-speed wireless transmission module C and the anti-dismantling control box E realizes an active anti-theft function, and prevents the situation that the grounding wire or the ground wire is stolen.
The invention also provides a monitoring method of the grounding circulation on-line monitoring system with active anti-theft and high-speed wireless transmission, which comprises the following steps:
step S1, after the system is powered on, the grounding circulation monitoring host A, the sound-light alarm module B and the 4G high-speed wireless transmission module C carry out power-on self-detection;
step S2, the grounding circulation monitoring host A acquires current data of three current transformers respectively arranged on connecting wires of the middle joints of A, B, C three-phase cables through a power quality chip, acquires temperature data of three temperature sensors respectively arranged on connecting wires of the middle joints of A, B, C three-phase cables through a special temperature detection circuit, and acquires state data of four vibration sensors respectively arranged on connecting wires of the middle joints of A, B, C three-phase cables and a ground wire through a vibration detection isolation circuit;
step S3, the grounding circulation monitoring host A compares the acquired data with the user parameters, and if the data exceeds the set threshold, the grounding circulation monitoring host A immediately generates alarm information and gives an alarm;
the method comprises the following steps that three types of alarms exist, namely, current is abnormal, when the detected current value exceeds a threshold value set by a user, an abnormal state is actively reported to a far-end background D through a 4G high-speed wireless transmission module C, and field responsible personnel are informed of checking the abnormal state in the field through short messages; secondly, temperature is abnormal, when the detected temperature value exceeds a threshold value set by a user, an abnormal state is actively reported to a far-end background D through a 4G high-speed wireless transmission module C, and field responsible personnel are informed of checking the abnormal state in the field through short messages; thirdly, vibration is abnormal, when the state data of the vibration sensor is detected to exceed a threshold set by a user, the abnormal state is actively reported to a far-end background D through a 4G high-speed wireless transmission module C, field responsible personnel are informed of checking the abnormal state in the field through short messages, and meanwhile, an audible and visual alarm module B is started to warn a thief; when any abnormality occurs, real-time data and alarm information when an alarm occurs are stored in the local memory at the same time of alarming.
Step S4, the grounding circulation monitoring host A compares the acquired data with the user parameters, if the data does not exceed the set threshold, no alarm information is generated, but the real-time data is stored in the local memory;
step S5, after the grounding loop current monitoring host a receives the request instruction from the remote background D through the 4G high-speed transmission module, it checks and analyzes the data according to the protocol, and then takes corresponding action according to the specific instruction.
The monitoring method of the invention adopts three anti-theft modes to be combined for anti-theft:
the first anti-theft mode is as follows: the acousto-optic alarm module B is used as a first active anti-theft mode, the acousto-optic alarm module B is an alarm integrating voice and an alarm lamp, the power of the whole alarm is 23W, the working voltage can be DC12V/24V or AC 220V/380V, the decibel of a loudspeaker is 110dB, the color of the alarm lamp can be selected, and the alarm tone is public security tone and supports voice setting. The working mode of the sound-light alarm module B is electrified to work, and the voice and the alarm lamp work simultaneously after the electricity is electrified. The power-on or off of the grounding loop current monitoring host is controlled by a grounding loop current monitoring host A, and when the GPIO of the grounding loop current monitoring host AMCU A1 is in a low level state, the module is in a power-off state, otherwise, the module is in a power-on state. Under normal conditions, the sound-light alarm module B is in a power-off non-working state. When detecting the abnormal signal of the vibration sensor c or the damage of the vibration sensor c, the MCU A1 of the grounding circulation monitoring host A sets the corresponding GPIO to be in a high level state, switches on the power supply of the sound-light alarm module B, triggers the sound-light alarm module B to work, and plays a role in warning thieves in a sound and light mode.
And (2) an anti-theft mode II: and the 4G high-speed wireless transmission module C provides a short message notification to serve as an active anti-theft mode II. When an abnormal signal of the vibration sensor C or the vibration sensor C is damaged, the MCU A1 of the grounding circulation monitoring host A sends a short message triggering instruction through the USB interface, and after the 4G high-speed wireless transmission module C receives the instruction, the pre-edited warning condition short message is sent to on-site responsible personnel to remind the responsible personnel to go to check in time.
And (3) an anti-theft mode is as follows: and adopting an anti-dismantling control box E as an anti-theft mode III. The anti-theft collection and control box E is locked by a special lockset and is provided with a power module F, a grounding circulation monitoring host A, an audible and visual alarm module B and a 4G high-speed wireless transmission module C. The position of the acousto-optic alarm module B of the control box E is designed to be in a grid shape, so that the sound and the alarm lamp signal can be effectively transmitted. An antenna interface is reserved at the position of the 4G high-speed wireless transmission module C of the convergence control box E, so that 4G signal transmission can be ensured. The anti-theft control box E can prevent a thief from cutting off the power supply F and damaging the monitoring host A, the sound-light alarm module B or the 4G high-speed wireless transmission module C.
The invention combines three anti-theft modes for use, and effectively solves the technical problem that the existing grounding circulation on-line monitoring device does not have a perfect grounding wire anti-theft function.
In addition, the invention has multiple functions and wide application range; small, low in manufacturing cost adopts the modular structure, falls into a plurality of little independence, the module of interact with whole circuit structure, conveniently reuses, upgrades, dismantlement, recovery and processing after the maintenance and the product abandonment.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made in the above embodiments by those of ordinary skill in the art without departing from the principle and spirit of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. A grounding circulation on-line monitoring system with active anti-theft and high-speed wireless transmission is characterized by comprising a grounding circulation monitoring host, a current transformer, a temperature sensor, a vibration sensor, an audible and visual alarm module and a 4G high-speed wireless transmission module; the grounding circulation monitoring host is arranged near a grounding wire of a middle joint of the power cable, and is provided with three current transformers which are respectively arranged on a grounding wire of a middle joint of an A, B, C three-phase cable and connected with the grounding circulation monitoring host through connectors; the grounding circulation monitoring host is provided with three temperature sensors, the three temperature sensors are respectively arranged on the A, B, C three-phase cable intermediate joint grounding wire and are connected with the grounding circulation monitoring host through connectors; the grounding circulation monitoring host A is provided with four vibration sensors which are respectively arranged on a grounding wire and a grounding wire of an intermediate joint of an A, B, C three-phase cable and are connected with the grounding circulation monitoring host through connectors; the sound and light alarm modules are arranged beside the grounding circulation monitoring host and are placed in the anti-disassembly junction box together, and the grounding circulation monitoring host is provided with the sound and light alarm modules which are connected with the grounding circulation monitoring host through signal lines. The 4G high-speed wireless transmission module is arranged beside the grounding circulation monitoring host and is placed in the anti-dismantling junction control box together, and each grounding circulation monitoring host is provided with one 4G high-speed wireless transmission module which is connected with the grounding circulation monitoring host through a connector.
2. The on-line ground circulation monitoring system with active anti-theft and high-speed wireless transmission function as claimed in claim 1, wherein the number of the ground circulation monitoring host computers is multiple, and each ground circulation monitoring host computer is installed at a ground wire of a middle joint of each power cable.
3. The system of claim 1, wherein the current transformer is a snap-in structure, and when installed, the mechanical snap-in is opened, sleeved on the grounding cable, and then closed.
4. The system of claim 1, wherein the temperature sensor is a metal temperature probe connected to the signal line, and when the system is installed, the metal temperature probe is placed on the grounding cable, the temperature probe is attached to the grounding cable by using heat-conducting silicone grease, the grounding cable is isolated from the ambient temperature, and finally the outermost layer of the system is wrapped by a special fireproof blanket.
5. The on-line ground circulation monitoring system with active theft prevention and high-speed wireless transmission according to claim 1, wherein the vibration sensor is a structure that a signal wire is connected with a metal vibration probe, and when the system is installed, the metal vibration probe is placed on a ground cable and then the outermost layer of the metal vibration probe is wrapped by a special fireproof blanket; in real-time fire blanket wrapping, the temperature sensor b and the vibration sensor can be wrapped together.
6. The on-line monitoring system for ground circulation with active anti-theft and high-speed wireless transmission according to claim 1, wherein the on-line monitoring system for ground circulation comprises a power quality chip, an MCU, a power control circuit for acousto-optic alarm module, a circuit dedicated for temperature detection, and a vibration detection isolation circuit, wherein the power quality chip is connected to three current transformers respectively, the power quality chip is further connected to the MCU, the MCU is connected to the power control circuit for acousto-optic alarm module, the circuit dedicated for temperature detection, and the vibration detection isolation circuit, the circuit dedicated for temperature detection is connected to three temperature sensors, the vibration detection isolation circuit is connected to four vibration sensors, the power control circuit for acousto-optic alarm module is connected to the acousto-optic alarm module, and the MCU is further connected to the 4G high-speed wireless transmission module.
7. The on-line ground circulation monitoring system with active theft prevention and high-speed wireless transmission as claimed in claim 6, wherein four of said vibration sensors are used to detect A, B, C whether the middle joint connecting wires and the ground wires of the three-phase cable are stolen or not, when the theft alarm occurs, the vibration sensors reverse the level of the output signal and output the signal to the vibration detection isolating circuit, and then the vibration detection isolating circuit transmits the detection signal to the MCU.
8. The system according to claim 1, wherein the 4G high-speed wireless transmission module is further in remote communication with an external remote background; the 4G high-speed wireless transmission module is a multi-mode 4G module and at least supports high-speed access of 2G, 3G and 4G networks of any one of mobile, communication and telecommunication; the SMS short message receiving and sending and short message configuration functions are supported; supporting a USIM card, an APN special card and an Internet of things card of the mobile phone; supporting FOTA differential upgrade; supporting FTP other upgrades.
9. A monitoring method based on the grounded circulating current on-line monitoring system with active anti-theft and high-speed wireless transmission according to any one of claims 1-8, characterized by comprising the following steps:
step S1, after the system is powered on, the grounding circulation monitoring host, the sound-light alarm module and the 4G high-speed wireless transmission module perform power-on self-detection;
step S2, the grounding circulation monitoring host machine acquires current data of three current transformers respectively arranged on connecting wires of the middle joints of A, B, C three-phase cables through a power quality chip, acquires temperature data of three temperature sensors respectively arranged on connecting wires of the middle joints of A, B, C three-phase cables through a special temperature detection circuit, and acquires state data of four vibration sensors respectively arranged on connecting wires of the middle joints of A, B, C three-phase cables and a ground wire through a vibration detection isolation circuit;
step S3, the grounding circulation monitoring host machine compares the acquired data with the user parameters, if the data exceeds the set threshold, the grounding circulation monitoring host machine generates alarm information immediately and gives an alarm;
step S4, the grounding circulation monitoring host compares the acquired data with the user parameters, if the data does not exceed the set threshold, no alarm information is generated, but the real-time data is stored in the local memory;
step S5, after the grounded loop current monitoring host receives the request instruction from the remote background through the 4G high-speed transmission module, the data is verified and analyzed according to the protocol, and then corresponding action is taken according to the specific instruction.
10. The monitoring method according to claim 9, wherein in step S3, there are three types of alarms, one is current abnormality, when the detected current value exceeds the threshold set by the user, the abnormal state is actively reported to the remote background through the 4G high-speed wireless transmission module, and the field responsible person is notified of the abnormal state by short message for viewing in the field; secondly, temperature is abnormal, when the detected temperature value exceeds a threshold value set by a user, an abnormal state is actively reported to a remote background through a 4G high-speed wireless transmission module, and field responsible personnel are informed of checking the abnormal state in the field through short messages; thirdly, vibration is abnormal, when the state data of the vibration sensor is detected to exceed a threshold set by a user, the abnormal state is actively reported to a far-end background through a 4G high-speed wireless transmission module, field responsible personnel are informed of checking the abnormal state in the field through short messages, and meanwhile, an audible and visual alarm module is started to warn a thief; when any abnormality occurs, real-time data and alarm information when an alarm occurs are stored in the local memory at the same time of alarming.
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| CN202010266108.0A CN111307219A (en) | 2020-04-07 | 2020-04-07 | Grounding circulation on-line monitoring system with active anti-theft and high-speed wireless transmission |
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| CN202010266108.0A CN111307219A (en) | 2020-04-07 | 2020-04-07 | Grounding circulation on-line monitoring system with active anti-theft and high-speed wireless transmission |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111932856A (en) * | 2020-08-05 | 2020-11-13 | 华北电力大学扬中智能电气研究中心 | Ground wire monitoring system and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111932856A (en) * | 2020-08-05 | 2020-11-13 | 华北电力大学扬中智能电气研究中心 | Ground wire monitoring system and method |
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