Embedded information security protection module of frequency converter

Abstract

The utility model discloses an embedded information safety protection module of a frequency converter, which is embedded into the frequency converter and comprises an MCU (Microprogrammed Control Unit) processor, a CAN (Controller Area Network) communication module connected with the MCU processor through a CAN communication circuit, and a Profinet communication module connected with the MCU processor through a Profinet communication circuit, the security authentication chip is connected with the MCU processor through an encryption chip communication circuit; and the 24V-to-5V power supply module is connected with the MCU processor through a 24V-to-5V communication circuit. The frequency converter embedded information security protection module prevents a third party from skipping the accessory market through reverse frequency converter software.

Description

Technical Field

[0001] The utility model relates to the technical field of inverter information security protection, and more specifically, to an inverter embedded information security protection module. Background Art

[0002] In the field of port machinery such as quay cranes, tire cranes, and rail cranes, equipment manufacturers often purchase inverters of various brands and integrate them into port machinery equipment to communicate with other modules. In order to meet the working conditions of port machinery, it is necessary to carry out secondary software development of the inverter, which requires a lot of time and manpower costs. The above-mentioned manpower costs are generally gradually recovered by equipment manufacturers in the process of selling inverter spare parts to their customers. However, some third parties have appeared in the market, which have created major risks to the information security of inverters by copying and reverse engineering the inverter software in port machinery equipment, plundering the normal supporting market that should belong to the equipment mall and disrupting the normal market order. Utility Model Content

[0003] The purpose of the utility model is to provide an embedded information security protection module for a frequency converter, which solves the technical problem in the prior art that a third party may cause a great hidden danger to the information security of the frequency converter through reverse frequency converter software and plunder the accessories market. The module can be embedded in the frequency converter, decrypt other encrypted information of the port machinery equipment into specific control instructions and send them to the frequency converter to complete the motor control, thereby preventing a third party from plundering the accessories market through reverse frequency converter software.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] The utility model provides an inverter embedded information security protection module, which is embedded in the inverter and comprises an MCU processor, a CAN communication module connected to the MCU processor through a CAN communication circuit, a Profinet communication module connected to the MCU processor through a Profinet communication circuit, a security authentication chip connected to the MCU processor through an encryption chip communication circuit, and a 24V to 5V power supply module connected to the MCU processor through a 24V to 5V communication circuit.

[0006] As an aspect of the frequency converter embedded information security protection module, the security authentication chip is a computing module with information security protection function. The computing module is embedded in the frequency converter. After completing its own security authentication, it decrypts other encrypted information of the port machinery equipment into specific control instructions and sends them to the frequency converter to complete the control of the motor.

[0007] As one aspect of the embedded information security protection module of the frequency converter, the CAN communication circuit is connected to the CAN transceiver chip through CANTX and CANRX to realize the exchange of MCU data and CAN bus data.

[0008] As one aspect of the inverter embedded information security protection module, one end of the Profinet communication module interacts with the MCU through the UART port, and the other end exchanges the MCU data to the Profinet device through the RJ45 network interface.

[0009] As one aspect of the frequency converter embedded information security protection module, the 24V to 5V communication circuit converts the 24V power supply of the frequency converter into 5V through a DC / DC chip for use in the frequency converter embedded information security protection module.

[0010] As one aspect of the frequency converter embedded information security protection module, the security authentication chip performs data interaction verification with the MCU via the IIC communication bus composed of SCL and SDA.

[0011] By adopting the above technical solution, the utility model has the following advantages:

[0012] The utility model provides an inverter embedded information security protection module, which is embedded in the inverter and works together with the inverter, without the need for secondary development of the inverter software; the inverter can only work if the inverter embedded information security protection module operates normally. Even if the software of the inverter embedded information security protection module is reversed by a third party, the third party cannot copy and produce the module. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Other features, objectives and advantages of the present invention will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings.

[0014] Figure 1 It is the internal structure diagram of the frequency converter embedded information security protection module;

[0015] Figure 2 This is the workflow diagram of the frequency converter embedded information security protection module;

[0016] Figure 3 It is the CAN communication circuit of the inverter embedded information security protection module;

[0017] Figure 4 It is the Profinet communication circuit of the frequency converter embedded information security protection module;

[0018] Figure 5It is the 24V to 5V communication circuit of the inverter embedded information security protection module;

[0019] Figure 6 It is the encryption chip communication circuit of the inverter embedded information security protection module. DETAILED DESCRIPTION

[0020] The technical solution of the present invention is specifically described below in conjunction with the drawings in the specification. The detailed features and advantages of the present invention are described in detail in the specific implementation mode. The content is sufficient to enable any technical personnel in this field to understand the technical content of the present invention and implement it accordingly. According to the description, claims and drawings disclosed in this specification, technical personnel in this field can easily understand the relevant purposes and advantages of the present invention.

[0021] Figure 1 The internal structure block diagram of the frequency converter embedded information security protection module is shown; a frequency converter embedded information security protection module is specifically as follows Figure 1 As shown, the inverter embedded information security protection module is embedded in the inverter, including an MCU processor, a CAN communication module connected to the MCU processor through a CAN communication circuit, a Profinet communication module connected to the MCU processor through a Profinet communication circuit, a security authentication chip connected to the MCU processor through an encryption chip communication circuit, and a 24V to 5V power supply module connected to the MCU processor through a 24V to 5V communication circuit.

[0022] Figure 2 The flowchart of the embedded information security protection module of the inverter is shown; the specific workflow of the embedded information security protection module of the inverter is as follows Figure 2 As shown in the figure, the core of the inverter embedded information security protection module is a security authentication chip embedded in the inverter and having information security protection function. The inverter embedded information security protection module communicates with other modules of the port machinery equipment through the Profinet module, and then decrypts the information and converts it into motor control instructions, which are sent to the inverter through the CAN module. The inverter can only work in the port machinery equipment through the inverter embedded information security protection module.

[0023] Figure 3 The CAN communication circuit of the frequency converter embedded information security protection module is shown; the CAN communication circuit of the frequency converter embedded information security protection module is specifically as follows Figure 3As shown in the figure, the CAN communication circuit is connected to the CAN transceiver chip through CANTX and CANRX to realize the exchange of MCU data and CAN bus data. The CAN control unit inside the MCU processor is connected to the CAN transceiver chip TJA1042 through CANTX and CANRX to realize the exchange of MCU data and CAN bus data. The CANHCANL of TJA1042 is connected to a TDKZJY510 common mode inductor to improve the EMC performance index of the circuit. Here, NPU2105 is a voltage stabilizing protection device to prevent damage to the transceiver chip due to abnormal voltage on the CAN network.

[0024] Figure 4 The Profinet communication circuit of the frequency converter embedded information security protection module is shown; the Profinet communication circuit of the frequency converter embedded information security protection module is shown Figure 4 As shown in the figure, the Profinet communication module is mainly ProfinetM. ProfinetM is a standardized Profinet module that exchanges data with the MCU through the UART port. Its other end exchanges the MCU data to the Profinet device through the RJ45 network interface. This module completes the conversion between the Profinet protocol and the UART communication protocol.

[0025] Figure 5 The 24V to 5V communication circuit of the frequency converter embedded information security protection module is shown in FIG. The 24V to 5V communication circuit of the frequency converter embedded information security protection module is shown in FIG. Figure 5 As shown, the 24V to 5V communication circuit mainly converts the 24V power supply of the inverter into 5V through the DC / DC chip for use in the inverter embedded information security protection module. This module is powered by the inverter providing 24V and GND through the connector.

[0026] The safety certification chip is customized by the port machinery equipment manufacturer to the chip manufacturer. It is a computing module embedded in the inverter with information security protection function. During operation, the MCU needs to continuously communicate and authenticate with the safety certification chip. After the authentication is passed, the safety certification chip can work normally. Chip manufacturers are not allowed to sell the same safety certification chip to third parties. In this way, even if a third party reverses the software of the embedded module, it still cannot copy a working embedded computing module.

[0027] Figure 6 The encryption chip communication circuit of the frequency converter embedded information security protection module is shown. Figure 6As shown in the figure, the working principle of the encryption chip communication circuit is as follows: the security authentication chip ALPU_C performs data interaction verification with the MCU through the IIC communication bus composed of SCL and SDA. First, the MCU generates a random number and then sends the random number to ALPU_C. After receiving the random number, ALPU_C calculates according to the embedded encryption algorithm to obtain a return value and sends it back to the MCU. The MCU calculates according to the internal algorithm to obtain an expected value. The MCU compares the expected value with the return value of ALPU_C. If they are consistent, it proves that the security authentication chip is valid and the MCU continues to execute. Otherwise, it proves that the security authentication chip is invalid and the MCU will reset.

[0028] Finally, it should be pointed out that although the present invention has been described with reference to the current specific embodiments, ordinary technicians in this technical field should realize that the above embodiments are only used to illustrate the present invention and are not used as a limitation of the present invention. Various equivalent changes or substitutions can be made without departing from the concept of the present invention. Therefore, as long as the changes and modifications to the above embodiments are within the essential spirit of the present invention, they will fall within the scope of the claims of the present invention.

Claims

1. A frequency converter embedded information security protection module, characterized in that: Embedded in the inverter, it includes an MCU processor, a CAN communication module connected to the MCU processor through a CAN communication circuit, a Profinet communication module connected to the MCU processor through a Profinet communication circuit, a security authentication chip connected to the MCU processor through an encryption chip communication circuit, and a 24V to 5V power supply module connected to the MCU processor through a 24V to 5V communication circuit.

2. The frequency converter embedded information security protection module according to claim 1, characterized in that: The security authentication chip is a computing module with information security protection function. The computing module is embedded in the inverter. After completing its own security authentication, it decrypts other encrypted information of the port machinery equipment into specific control instructions and sends them to the inverter to complete the control of the motor.

3. The frequency converter embedded information security protection module according to claim 1, characterized in that: The CAN communication circuit is connected to the CAN transceiver chip through CANTX and CANRX to realize the exchange of MCU data and CAN bus data.

4. The frequency converter embedded information security protection module according to claim 1, characterized in that: One end of the Profinet communication module exchanges data with the MCU via the UART port, and the other end exchanges the MCU data to the Profinet device via the RJ45 network interface.

5. The frequency converter embedded information security protection module according to claim 1, characterized in that: The 24V to 5V communication circuit converts the 24V power supply of the inverter into 5V through a DC / DC chip for use in the inverter embedded information security protection module.

6. The frequency converter embedded information security protection module according to claim 1, characterized in that: The security authentication chip performs data interaction verification with the MCU via the IIC communication bus composed of SCL and SDA.

Images