Today, I will introduce a national invention authorized patent-a multifunctional smart meter. The patent was applied for by Changzhou Deshi New Technology Development Co., Ltd., and the authorization was announced on July 31, 2018. The invention relates to a multifunctional smart meter, in particular to a smart meter containing real-time location information collection function, power failure alarm function, NB-IOT communication technology, and remote control socket. Most of the current electricity meters can only measure electricity, and some only have wireless or wired transmission functions. These general-purpose meters can only meet the electricity needs of regular users; now with the diversification of electricity usage, equipment is temporarily or long-term leased There are more and more applications such as temporary renting of electricity by residents, and the power supply is no longer limited to the power supply bureau, but may be ordinary people. The traditional general-purpose meter is not suitable for these power suppliers to know the power supply situation, power supply location, and Applications requiring remote control of power failure or power supply. The present invention proposes a new multifunctional smart meter for non-conventional residents’ electricity use occasions such as temporary or long-term lease of electricity for equipment, temporary lease of households, etc. The multifunctional smart meter includes not only the power metering function, but also Real-time location information collection function, power failure alarm function, NB-IOT communication technology, remote control socket. The technical scheme adopted by the present invention is: a multifunctional smart meter, which includes a processor, a voltage acquisition circuit, a current acquisition circuit, a power failure detection circuit, a controllable socket with relay control, a GPS module, a height sensor, and NB-IOT Communication module, battery and charging circuit, display module, and 485 communication circuit; the voltage acquisition circuit is respectively connected to the AC power supply line and the processor for realizing the measurement of the voltage of the power supply line; the current acquisition circuit is respectively connected to the AC power supply line The live wire and the processor are used to measure the power supply current; the GPS module and the height sensor are respectively connected to the processor for real-time location information collection; the power failure detection circuit is connected to the processor to implement the power failure Electric alarm; the controllable socket is connected to the processor to realize the remote control socket function; the NB-IOT communication module is connected to the processor to realize the NB-IOT wireless communication; the battery and charging circuit are used Supply power to the device; the 485 communication circuit is connected to the processor, and is used to implement communication and data transmission between the processor and the upper computer. The processor adopts a single-chip processor. The height sensor uses a BMP280 sensor chip, and pins 2, 3, 4, and 5 of the BMP280 sensor chip are respectively connected to the data transmission interface of the processor through a resistor R31. The NB-IOT communication module includes an NB05-01 module and a SIM card holder. The processor uses the 51 series STM32L151C8 processing chip; the pin 37 of the STM32L151C8 processing chip is connected to the VBAT pin of the NB05-01 module through the resistor R20, the transistor D05 and the transistor D06 in turn, and the pin 12 of the STM32L151C8 processing chip passes The transistor D06 is connected to the RXD pin of the NB05-01 module, and the pin 13 of the STM32L151C8 processing chip is connected to the TXD pin of the NB05-01 module through a resistor R17. The voltage acquisition circuit includes a resistor R30, a resistor R34, a resistor 35, and a capacitor C38. One end of the resistor R30 is connected to the live wire of the AC power supply line, the other end is connected to the processor, and this end is also connected to one end of the resistor R34 and One end of the resistor 35 and the capacitor C38 connected in parallel to each other, the other end of the resistor R34 is connected to a 3V power supply, and the other end of the resistor 35 and the capacitor C38 connected in parallel to each other is used as a ground wire to connect to the neutral line of the AC power supply line. The current acquisition circuit includes a current transformer I1, and a resistor R29, a resistor R36, and a capacitor C34 respectively connected in parallel at both ends of the current transformer I1. The resistor R36 and the capacitor C34 are connected in series with each other and connected in parallel at both ends of the resistor R29. One end of the capacitors C34 connected to each other is used as an output end to connect to the processor, the other end of the capacitor C34 is connected to one end of the capacitor C33, the resistor R27, and the resistor R28, respectively, and the other ends of the capacitor C33 and the resistor R28 are grounded, so The other end of the resistor R27 is connected to a 3V power supply, and this end is also connected to the anode of the polar capacitor C37, and the cathode of the polar capacitor C37 is grounded. The controllable socket includes a relay for controlling the power on and off of the socket, and the drive control end of the relay is connected to the processor through a transistor D09. The present invention has the following beneficial effects: 1. It contains a complete meter function, and can realize the metering of the electricity used by the electricity user. 2. Including position sensor: GPS module and height sensor integrated in the multi-functional smart meter can monitor the current position and height information of the meter in real time, so that it is easy to know the current position of the meter at any time, especially for complex environments (such as high-rise buildings). Application, can find the location of the electric meter at any time according to the height information. 3. With the power failure alarm function, it is convenient for the power supply and the user to know the current power supply status at any time, and it can be restored in time if there is a line failure. 4. Use NB-IOT communication technology: NB-IOT (Narrowband Internet of Things) technology, networked and operated by communication operators, supports the cellular data connection of low-power devices in the wide area network, and NB-IoT supports long standby time and network connection The high-efficiency connection of higher equipment is required, and its low tariffs, reliable network coverage and low power consumption all determine that this technology will be widely used in all aspects of the Internet of Things. 5. With remote control socket: it is convenient for the power supplier to cut off or restore the power supply to the power user at any time.
Withstand high voltage up to 750V (IEC/EN standard)
UL 94V-2 or UL 94V-0 flame retardant housing
Anti-falling screws
Optional wire protection
1~12 poles, dividable as requested
Maximum wiring capacity of 4 mm2
Feed Through Terminal Block,T12 Series Terminal Blocks,Terminal Strips Connector,Cable Connectors Block Jiangmen Krealux Electrical Appliances Co.,Ltd. , https://www.krealux-online.com![[New patent introduction] A multi-functional smart meter](http://i.bosscdn.com/blog/o4/YB/AF/tgEMeAOf4jAAFPWGXClh4528.jpg)
The figure is a block diagram of the principle of the present invention.