[0035] Example
[0036] Please refer to figure 1 , a smart meter, including a main control module, a data acquisition module, a data processing module, a data storage module, a data display module, a physical unclonable function module and a fingerprint module;
[0037] The data acquisition module, data processing module, data storage module, data display module, physical unclonable function module and fingerprint module are respectively connected with the main control module;
[0038] The data collection module is used to collect the voltage and current information of the user's entry terminal;
[0039] The data processing module is used to process user voltage and current information and obtain electric energy information and electricity charges;
[0040] The physical unclonable function module is used for the unique unforgeable device number of the smart meter;
[0041] The fingerprint module is used for entering and identifying user fingerprints;
[0042] The data storage module is used to store voltage and current information, electric energy information, electricity charges and fingerprint information;
[0043] The data display module is used to display the data required by the user after the user's fingerprint is identified;
[0044] The main control module is used to call and control other modules.
[0045] The principle of the present invention is as follows: the main control module controls the data acquisition module to collect the voltage and current information of the user's entry terminal, and stores the data collected by the data acquisition module into the data storage module; information, and store the data processed by the data processing module in the data storage module; call the physical non-clonable function module to generate the unique non-replicable device number of the smart meter, and store the device number in the data storage module; The fingerprint module records and recognizes the user's fingerprint, and stores the fingerprint information entered by the fingerprint module in the data storage module. If the fingerprint information exists in the data storage module, the user identity authentication is passed; if the fingerprint information does not exist in the data storage module, the user identity authentication fails; at the same time, it is also responsible for the processing of the man-machine interface. The information required by the user is displayed and various parameters are set for the smart meter.
[0046]To sum up, the physical unclonable function circuit is made by using the deviation of the process parameters in the device manufacturing process. If an excitation is applied to the physical unclonable function circuit, an unpredictable response will be obtained due to the deviation of the internal manufacturing process of the device. Similar to human fingerprints, it has the characteristics of being unforgeable and tamper-proof; the invention uses a physical unclonable function module to generate the unique non-replicable device number of the smart meter, so that the identity of the smart meter is unique, unforgeable and tamper-proof, and the data display The module only displays the data required by the user after the user's fingerprint is identified, which avoids the leakage of the user's electricity consumption information, thereby protecting the privacy of the user's electricity consumption.
[0047] In this embodiment, the smart meter includes a clock module, which is connected to the main control module and provides standard time, wherein the clock module is a real-time clock chip.
[0048] In this embodiment, the smart meter includes a button module, which is connected to the main control module and used for the user to set parameters of the smart meter.
[0049] In this embodiment, the data display module is an LED liquid crystal display; the data storage module is a ferroelectric memory, and the ferroelectric memory has non-volatility, fast read and write speed, no delay, long read and write data, Long data storage time and other advantages.
[0050] The smart meter is also provided with a reset module and a switch module, the reset module is used to reset the smart meter, clears various parameters set by the user and the data stored in the data storage module; the switch module is used to turn on or off the smart meter.
[0051] In this embodiment, the smart meter includes a power supply module, and the power supply module provides power for the smart meter. Specifically, the power supply module supplies the main control module, data processing module, data storage module, data display module, physical unclonable function module, Fingerprint module, clock module, button module and reset module are powered by industrial frequency power supply. If the industrial frequency power supply is cut off, backup battery is used for power supply;
[0052] Wherein, the power supply module includes a power conversion circuit and a power monitoring circuit, the power conversion circuit is used to convert the 220V power frequency power supply voltage into the DC power required by the smart meter, and the power monitoring circuit is used to monitor whether the power supply voltage is normal. The power monitoring circuit can also prevent the main control module from crashing or the program running away by using the watchdog timer, so as to ensure the normal and stable operation of the main control module.
[0053] Please refer to figure 2 , an electricity charge recharging system, including the above-mentioned smart meter, and also includes an electricity fee payment platform, a WIFI communication module and a client mobile device;
[0054] The smart meter communicates with the client mobile device through the WIFI communication module, and the smart meter sends the user electric energy information, electricity charge information and the device number of the smart meter stored in the data storage module to the client mobile device through the WIFI communication module ; The client mobile device recharges the electricity charge of the smart meter on the electricity fee payment platform according to the received user power information, electricity charge information and the device number of the smart meter.
[0055] The electricity charge recharging system of the present invention generates the unique device number of the smart meter through the physical unclonable function module of the smart meter. The device number is similar to a human fingerprint and cannot be forged or tampered. For the client mobile device, the client mobile device recharges the smart meter on the electricity bill payment platform according to the device number, which can prevent the user from misremembering the smart meter number or the smart meter number being tampered with by criminals, resulting in smart meter electricity charge recharge error.
[0056] In this embodiment, the client mobile device is a mobile phone or a computer or a tablet. The client mobile device can complete the electricity charge recharge of the smart meter on the electricity bill payment platform through Alipay, WeChat, and bank card, wherein the client mobile device needs to download a WIFI serial port assistant APP, which can be used for communication with the smart meter The WIFI communication module communicates, so as to be able to receive the data sent by the WIFI module of the smart meter.
[0057] In summary, the present invention has the following advantages and beneficial effects compared with the prior art:
[0058] 1. In the smart meter of the present invention, the fingerprint information of the user is entered through the fingerprint module, and the entered user fingerprint information is stored in the data storage module through the main control module. When the user needs to check the electricity consumption information or operate the smart meter , first perform identity authentication, that is, extract the user’s fingerprint through the fingerprint module, and compare it with the fingerprint stored in the data storage module through the main control module. If the fingerprint information exists in the data storage module, the user’s identity authentication is passed. If the fingerprint information does not exist in the data storage module, the user identity authentication will fail, and the display screen will always be in a black state, and the user’s electricity consumption information cannot be viewed, nor can Perform related operations on the smart meter, so as to effectively protect the security of the user's electricity consumption information and prevent the user's privacy from being leaked;
[0059] 2. When the smart meter and the electricity charge recharge system in the present invention are recharging the electricity charge, the unique device number of the smart meter is generated through the physical unclonable function module of the smart meter. The device number is similar to a human fingerprint and cannot be forged or tampered with , send the device number to the client mobile device, and the client mobile device will recharge the smart meter on the electricity bill payment platform according to the device number, which can prevent the user from misremembering the smart meter number or the smart meter number being tampered with by criminals , resulting in an error in recharging the electricity bill of the smart meter.
