Abstract: The article faces the cheating electronic scale that appears on the market. By collecting electronic valuation scales of multi -brand and different cheating methods, the principle of cheating is studied, and algorithm simulation is used to use the cheating rules, and then prioritize the use of cheating code known as cheating laws. The suspicious electronic pricing scale conducts high -efficiency anti -cheating detection to achieve the goal of fast and reliable detection of suspicious electronic pricing scales to provide technical guarantees for administrative law enforcement.
As a measuring instrument premium for trade settlement, the electronic pricing scale is based on the requirements of the "Measurement Law of the People's Republic of China" and the "Work Metering Equipment Catalog of the Mandarin Grade of the People's Republic of China". Electronic scales in trade settlement, security protection, medical care, and environmental monitoring must be qualified before use before use.
Because illegal manufacturers pursue illegal income, a few vendors in the market use electronic pricing scale with cheating function to infringe consumer rights. JJG 539-2016 "Digital Instruction Scale" is not right in the prosecution rules
The detection of the cheating module of the scale, its cheating function has the characteristics of concealment, complexity, and professionalism. It cannot be effectively detected through the existing measurement standard device. Therefore, it is urgent to study the anti -electronic scales cheating system.
1 Inquiry and analysis of the anti -cheating method of electronic pricing scale
The Xi'an Institute of Metrology Technology collects and analyzes the various methods of cheating scales in the market with electronic pricing scales on the market. After the restart, it is restored, so it is no different from the normal electronic scale before entering the cheating code without entering the cheating code, and its concealment is strong. This kind of electronic pricing
The scale requires the statistical key value combination, analyzes its high probability combination, and uses the poor algorithm to verify the cheating password, enter the cheating mode, thereby determining that it is a cheating electronic pricing scale. In addition, there are also remote control to control cheating scales to enter the cheating mode. Such cheating electronic pricing scales need to launch frequency and encoding analysis of the remote control, and the duplication process. Through experimental analysis, the two types of cheating scales are to type the cheating code through different ways to achieve their cheating function. Therefore, identifying the cheating code is the key to research.
2 Principles and design of anti -cheating detection system
Based on the current collection of cheating electronic pricing scales, the cheating code can be activated through various methods to activate the cheating function. Therefore, the starting point of this project is mainly in the automated detection of electronic pricing scale cheating codes. To achieve the anti -cheating detection system, it is necessary to design and research from both hardware and software.
2. 1 The architecture design of the anti -cheating detection system
The architecture of the anti -cheating detection system is designed from the following four levels
2. 2 key value simulation scanning
First of all, the electronic pricing scale keyboard will be simulated input, and the character location information on the electronic scale button will be established with the corresponding relationship with the underlying control chip. The keyboard is generally implemented by three ways: scanning and keyboard chip GPIO. This system uses a row scanned keyboard. It consists of lines and lines, and the keys are located at the cross point of the ranks. When the button is pressed, the lines and lines of the intersection point are connected, and the level of the corresponding lines or lines on the line changes. The MCU can determine the key position of the keys through the level of the level of the detection line or the line line. The electronic pricing scale scan the keyboard input every 25 MS, and the connection key input is controlled within 3s. After each function key input, a "no key" is issued as the input ending character as the node. In the key value simulation, consider the maintenance time of the keys, and the relationship between the effectiveness of the time and the keys is part of the anti -cheating detection.