CN210181110U - Low-voltage electricity stealing prevention switch - Google Patents
Low-voltage electricity stealing prevention switch Download PDFInfo
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- CN210181110U CN210181110U CN201920877880.9U CN201920877880U CN210181110U CN 210181110 U CN210181110 U CN 210181110U CN 201920877880 U CN201920877880 U CN 201920877880U CN 210181110 U CN210181110 U CN 210181110U
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Abstract
The utility model discloses a low-voltage electricity stealing prevention switch, which comprises a voltage sampling module, a current sampling module, a power module, a controller module, a clock module and a communication module; the low-voltage anti-theft switch is connected in series with the power line and is positioned at the front end of the electric energy meter; the power supply module supplies power; the voltage sampling module samples a power line voltage signal and uploads the power line voltage signal to the controller module; the current sampling module samples a current signal of the power line and uploads the current signal to the controller module; the clock module provides a clock signal; the controller module receives the voltage and current sampling signals to measure the electric energy and communicates with the outside through the communication module. The utility model discloses an increase the low pressure electricity-stealing prevention switch that has measurement and communication function before the electric energy meter to carry out the mode of contrast to the measurement data of low pressure electricity-stealing prevention switch and electric energy meter, realized to the prevention of stealing the electric action, discovery and upload, moreover the utility model discloses technical scheme reliability is high, steals the efficient that the electricity detected.
Description
Technical Field
The utility model particularly relates to a low pressure electricity stealing prevention switch.
Background
With the development of economic technology and the improvement of living standard of people, electric energy becomes essential secondary energy in production and life of people, and brings endless convenience to production and life of people.
However, as the amount of electricity used increases, the cost of electricity charges also gradually increases. Few lawbreakers have begun to steal electricity in order to achieve low or no electricity charges. At present, common electricity stealing methods are various, such as short-circuiting a secondary current transformer for metering electric energy to enable the current collected by an electric energy meter to be smaller than an actual current value, or short-circuiting an outgoing line and an incoming line of the electric energy meter to bypass the electric energy meter. Therefore, the electricity meter cannot normally measure accurate electricity quantity data. The electricity stealing can not only bring financial loss to power supply enterprises, but also disturb the topological structure of the power grid more seriously, thereby influencing the safe and reliable operation of the power grid.
At present, in order to prevent users from stealing electricity, the mode that power supply enterprises adopt is mostly the mode of manual patrol, or adopts portable electric energy to patrol the appearance and carry out anti-electricity-theft monitoring. However, the manual inspection mode is time-consuming and labor-consuming, and has extremely low efficiency and low reliability.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a high and high low pressure electricity-stealing prevention switch of detection efficiency of reliability.
The utility model provides a low-voltage electricity stealing prevention switch, which comprises a voltage sampling module, a current sampling module, a power module, a controller module, a clock module and a communication module; the voltage sampling module, the current sampling module, the clock module and the communication module are all connected with the controller module; the low-voltage anti-theft switch is connected in series with the power line and is positioned at the front end of the electric energy meter; the power supply module supplies power to the low-voltage electricity stealing prevention switch; the voltage sampling module is used for sampling a voltage signal of the connected power line and uploading the voltage signal to the controller module; the current sampling module is used for sampling a current signal of the connected power line and uploading the current signal to the controller module; the clock module is used for providing a clock signal for the controller module; the controller module is used for receiving the voltage sampling signal and the current sampling signal, carrying out electric energy metering and communicating with the outside through the communication module.
The low-voltage electricity larceny prevention switch also comprises a memory module; the memory module is connected with the controller module and is used for storing the working data of the low-voltage anti-theft switch.
The memory module is a circuit formed by memory chips with the model number M24C 512A.
The voltage sampling module is a voltage sampling module formed by an operational amplifier.
The current sampling module comprises a current transformer and a current sampling circuit; the current transformer is connected to the power line and samples a current signal of the power line; the sampled signals are converted into voltage signals through a current sampling circuit, processed and then uploaded to a controller module.
The current sampling circuit is a current sampling circuit formed by operational amplifiers.
The controller module is a controller module formed by a controller chip with the model number of KM 34.
The clock module is a clock module formed by a clock chip with the model number of RX 8025.
The communication module comprises a first communication circuit and a second communication circuit; the first communication circuit is connected with a communication interface of the electric energy meter and carries out data communication; the second communication circuit is connected with an information acquisition terminal of the power system and performs data communication.
The first communication circuit is a communication circuit formed by an RS485 communication chip with the model number of MAX 13085; the second communication module is a communication circuit formed by an RS485 communication chip with the model number of MAX 13085.
The utility model provides a this kind of low pressure electricity-stealing prevention switch has the low pressure electricity-stealing prevention switch of measurement and communication function through increasing before the electric energy meter to carry out the mode of contrast to the measurement data of low pressure electricity-stealing prevention switch and electric energy meter, realized to stealing prevention, the in time discovery of electric action and in time upload, moreover the technical scheme reliability of the utility model is high, steal the efficiency that the electricity detected moreover higher.
Drawings
Fig. 1 is a schematic diagram of the connection between the low-voltage anti-electricity-theft switch and the power system of the present invention.
Fig. 2 is a functional block diagram of the low-voltage anti-theft switch of the present invention.
Fig. 3 is a schematic circuit diagram of a current sampling circuit of the low-voltage anti-theft switch of the present invention.
Fig. 4 is a schematic circuit diagram of a voltage sampling circuit of the low-voltage anti-theft switch of the present invention.
Fig. 5 is a schematic circuit diagram of a controller module of the low-voltage anti-theft switch of the present invention.
Fig. 6 is a schematic circuit diagram of a memory module of the low-voltage anti-theft switch of the present invention.
Fig. 7 is a schematic circuit diagram of a clock module of the low-voltage anti-theft switch of the present invention.
Fig. 8 is a schematic circuit diagram of a first communication circuit of the low-voltage anti-theft switch according to the present invention.
Fig. 9 is a schematic circuit diagram of a second communication circuit of the low-voltage anti-theft switch of the present invention.
Detailed Description
Fig. 1 shows a schematic connection diagram of the low-voltage anti-electricity-theft switch and the power system of the present invention: the low-voltage anti-theft switch is connected in series with the power line and is positioned at the front end of the electric energy meter; the low-voltage electricity stealing prevention switch is used for measuring the electric energy for the first time before the electric energy meter; meanwhile, the low-voltage electricity stealing prevention switch is connected with the electric energy meter and the information acquisition terminal through a communication line, and the information acquisition terminal is not directly connected with the electric energy meter any more. When the information acquisition terminal needs to communicate with the electric energy meter, the low-voltage electricity larceny prevention switch can be used as an intermediate bridge for transmitting communication data, so that data communication between the electric energy meter and the information acquisition terminal is realized.
Fig. 2 shows a functional block diagram of the low-voltage anti-theft switch of the present invention: the utility model provides a low-voltage electricity stealing prevention switch, which comprises a voltage sampling module, a current sampling module, a power module, a controller module, a clock module, a communication module and a memory module; the memory module, the voltage sampling module, the current sampling module, the clock module and the communication module are all connected with the controller module; the low-voltage anti-theft switch is connected in series with the power line and is positioned at the front end of the electric energy meter; the power supply module supplies power to the low-voltage electricity stealing prevention switch; the voltage sampling module is used for sampling a voltage signal of the connected power line and uploading the voltage signal to the controller module; the current sampling module is used for sampling a current signal of the connected power line and uploading the current signal to the controller module; the clock module is used for providing a clock signal for the controller module; the controller module is used for receiving the voltage sampling signal and the current sampling signal, metering electric energy and communicating with the outside through the communication module; the memory module is used for storing the working data of the low-voltage anti-theft switch.
Fig. 3 shows a schematic circuit diagram of a current sampling circuit of the low-voltage anti-theft switch of the present invention: as shown in the figure, the phase A current sampling circuit of the utility model is also provided with a phase B and a phase C current sampling circuit, and the phase B and the phase C current sampling circuit are the same as the phase A current sampling circuit; in the current sampling circuit, IA-and IA + are connected with the output end of the phase current transformer A; the current sampling signal output by the current transformer is converted into a voltage signal through a resistor R3, then current is limited through a resistor R1, then voltage tracking is carried out through a voltage follower formed by an operational amplifier U1, and an A-phase current sampling signal ADC _ IA is obtained and uploaded to a controller module; resistors R2 and C1 are used to filter the signal.
Fig. 4 shows a schematic circuit diagram of a voltage sampling circuit of the low-voltage anti-theft switch of the present invention: as shown in the figure, the A phase voltage sampling circuit of the utility model is also provided with a B phase voltage sampling circuit and a C phase voltage sampling circuit, and the B phase voltage sampling circuit and the C phase voltage sampling circuit are both the same as the A phase voltage sampling circuit; UA is connected with phase line A of the power line, UN is connected with zero phase line of the power line; after voltage between two lines of UA and UN is divided by resistors R13 and R16, the voltage of a resistor R16 is limited by a resistor R14, and then voltage following is carried out by a voltage follower consisting of an operational amplifier U7, so that a final A-phase voltage sampling signal ADC _ UA is obtained and input to a controller module; the resistor R15 and the capacitor C6 form an RC filter circuit to filter signals.
Fig. 5 is a schematic diagram of the circuit principle of the controller module of the low-voltage anti-theft switch of the present invention: the controller module is formed by a controller chip with the model number of KM 34; three current sampling signals ADC _ IA, ADC _ IB and ADC _ IC, three voltage sampling signals ADC _ UA, ADC _ UB and ADC _ UC are uploaded to pins (ADC 1-ADC 6) of a controller chip U13; meanwhile, an SDA pin and an SCL pin of an I2C communication bus of the controller chip are connected with a memory module and a clock module at the rear end, and meanwhile, two communication lines are connected with a power supply signal VDD through respective pull-up resistors (resistors R17 and R18), so that the level stability of the communication lines is ensured; the VDD pin of the controller chip is directly connected with a power supply signal VDD, and the GND pin and the VREF pin of the controller chip are simultaneously grounded; the first serial ports RXD1 and TXD1 of the controller chip are connected with a first communication circuit, so that the power meter is connected and communicates through the first communication circuit; the second serial ports RXD2 and TXD2 of the controller chip are connected with the second communication circuit, so that the information acquisition terminal is connected and communicated through the second communication circuit; the 485EN1 is used for outputting a first communication control signal to control the work of the first communication circuit, and the 485EN2 is used for outputting a second communication control signal to control the work of the second communication circuit.
Fig. 6 is a schematic diagram of the circuit principle of the memory module of the low-voltage anti-theft switch of the present invention: the memory module is a module formed by a memory chip with the model number M24C 512A; pins 1 to 4 of the chip are directly grounded; the 5 pins and the 6 pins of the chip are used as I2C buses to be connected with an I2C communication pin of the controller module, meanwhile, the 7 pins of the chip are suspended, and the 8 pins are connected with a power signal to get power.
Fig. 7 is a schematic diagram of the circuit principle of the clock module of the low-voltage anti-theft switch of the present invention: the clock module adopts a circuit formed by a clock chip with the model XXXXX; the 6 pins of the chip are connected with a power signal and get electricity; the 11 pins of the chip are grounded; the 7 pins of the chip are grounded, the 2 pins and the 13 pins of the chip are I2C communication pins, and the I2C communication pins of the controller module are directly connected and communicate (provide clock signals); meanwhile, other pins of the chip are all suspended.
Fig. 8 is a schematic diagram of the circuit principle of the first communication circuit of the low-voltage anti-theft switch of the present invention: the first communication circuit is a circuit formed by a communication chip with the model number of MAX 13085; the 1 pin of the chip is connected with an RXD1 communication signal of the controller module, the 4 pin of the chip is connected with a TXD1 communication signal of the controller module, and the 2 pin and the 3 pin of the chip are both connected with a first communication control signal 485EN1 of the controller module; 8 pins of the chip are used for directly supplying power signals and getting electricity; the 5 pins of the chip are directly grounded; pins 6 and 7 of the chip are RS485 communication pins which are externally connected; the 6 pin is connected with a power supply signal through a pull-up resistor R11, and the 7 pin is grounded through a pull-down resistor R12, so that the stability of the signals of the 6 pin and the 7 pin when the pins are not used is ensured.
Fig. 9 is a schematic diagram of the circuit principle of the second communication circuit of the low-voltage anti-theft switch of the present invention: the second communication circuit is a circuit formed by a communication chip with the model number of MAX 13085; the 1 pin of the chip is connected with an RXD2 communication signal of the controller module, the 4 pin of the chip is connected with a TXD2 communication signal of the controller module, and the 2 pin and the 3 pin of the chip are both connected with a first communication control signal 485EN2 of the controller module; 8 pins of the chip are used for directly supplying power signals and getting electricity; the 5 pins of the chip are directly grounded; pins 6 and 7 of the chip are RS485 communication pins which are externally connected; the 6 pin is connected with a power supply signal through a pull-up resistor R19, and the 7 pin is grounded through a pull-down resistor R24, so that the stability of the signals of the 6 pin and the 7 pin when the pins are not used is ensured.
When the information acquisition terminal needs to communicate with the electric energy meter, the information acquisition terminal directly communicates with the low-voltage electricity larceny prevention switch through the first communication circuit, communication data are sent to the low-voltage electricity larceny prevention switch through the first communication circuit, and the low-voltage electricity larceny prevention switch sends the communication data to the electric energy meter through the second communication circuit; similarly, when the electric energy meter needs to upload data to the information acquisition terminal, the electric energy meter can upload the uploaded data information to the low-voltage electricity stealing prevention switch through the second communication circuit, and the low-voltage electricity stealing prevention switch can upload the communication data to the information acquisition terminal through the first communication circuit when the information acquisition terminal is idle. Due to the existence of the low-voltage anti-theft switch, a communication bridge exists between the information acquisition terminal and the electric energy meter. Meanwhile, the low-voltage electricity larceny prevention switch can also be independently communicated with an information acquisition terminal or an electric energy meter and perform data interaction.
Claims (10)
1. A low-voltage electricity stealing prevention switch is characterized by comprising a voltage sampling module, a current sampling module, a power supply module, a controller module, a clock module and a communication module; the voltage sampling module, the current sampling module, the clock module and the communication module are all connected with the controller module; the low-voltage anti-theft switch is connected in series with the power line and is positioned at the front end of the electric energy meter; the power supply module supplies power to the low-voltage electricity stealing prevention switch; the voltage sampling module is used for sampling a voltage signal of the connected power line and uploading the voltage signal to the controller module; the current sampling module is used for sampling a current signal of the connected power line and uploading the current signal to the controller module; the clock module is used for providing a clock signal for the controller module; the controller module is used for receiving the voltage sampling signal and the current sampling signal, carrying out electric energy metering and communicating with the outside through the communication module.
2. The low voltage anti-theft switch of claim 1 further comprising a memory module; the memory module is connected with the controller module and is used for storing the working data of the low-voltage anti-theft switch.
3. The low voltage anti-theft switch as claimed in claim 2, wherein said memory module is a circuit formed by a memory chip of type M24C 512A.
4. The low-voltage electricity stealing switch according to any one of claims 1 to 3, wherein the voltage sampling module is a voltage sampling module comprising an operational amplifier.
5. The low-voltage electricity stealing switch according to any one of claims 1 to 3, wherein the current sampling module comprises a current transformer and a current sampling circuit; the current transformer is connected to the power line and samples a current signal of the power line; the sampled signals are converted into voltage signals through a current sampling circuit, processed and then uploaded to a controller module.
6. The low voltage anti-theft switch as claimed in claim 5, wherein said current sampling circuit is a current sampling circuit comprising an operational amplifier.
7. A low voltage anti-theft switch according to any one of claims 1 to 3, wherein the controller module is a controller module comprising a controller chip of type KM 34.
8. A low voltage anti-theft switch according to any one of claims 1 to 3, wherein said clock module is a clock module comprising a clock chip of type RX 8025.
9. A low voltage anti-theft switch according to any one of claims 1 to 3, wherein said communication module comprises a first communication circuit and a second communication circuit; the first communication circuit is connected with a communication interface of the electric energy meter and carries out data communication; the second communication circuit is connected with an information acquisition terminal of the power system and performs data communication.
10. The low-voltage electricity stealing prevention switch according to claim 9, wherein the first communication circuit is a communication circuit formed by an RS485 communication chip with a model number of MAX 13085; the second communication circuit is a communication circuit formed by an RS485 communication chip with the model number of MAX 13085.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920877880.9U CN210181110U (en) | 2019-06-12 | 2019-06-12 | Low-voltage electricity stealing prevention switch |
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| CN201920877880.9U CN210181110U (en) | 2019-06-12 | 2019-06-12 | Low-voltage electricity stealing prevention switch |
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| CN210181110U true CN210181110U (en) | 2020-03-24 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110308314A (en) * | 2019-06-12 | 2019-10-08 | 威胜电气有限公司 | Low-voltage anti-theft electric switch and its electricity anti-theft method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110308314A (en) * | 2019-06-12 | 2019-10-08 | 威胜电气有限公司 | Low-voltage anti-theft electric switch and its electricity anti-theft method |
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| GR01 | Patent grant | ||
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| CP01 | Change in the name or title of a patent holder |
Address after: 411201 28 Bai Shi Road, Jing Kai District, Xiangtan, Hunan Patentee after: Weisheng Energy Technology Co.,Ltd. Address before: 411201 28 Bai Shi Road, Jing Kai District, Xiangtan, Hunan Patentee before: WASION ELECTRIC Co.,Ltd. |
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| CP01 | Change in the name or title of a patent holder |