USB line concentration device with safety control function

Abstract

The invention discloses a USB hub device with a safety control function, which is characterized in that a hub module is connected with an upper computer USB socket J1 through a USB hub chip IC3, a Vcc end pin of the USB hub chip IC3 is connected with an electronic switch K1, the other end of the electronic switch K1 is connected with the upper computer USB socket J1, and the other end of the electronic switch K1 is connected with the upper computer USB socket J1. The current sensor L1 is installed on a connecting line between the upper computer USB socket J1 and a power supply end pin of the USB concentrator chip IC3, and the upper computer USB socket J1 is connected with an upper computer through a USB cable; the positive electrode of the current sensor L1 is connected with the AD1 pin of the single-chip microcomputer IC1, and the negative electrode is grounded. According to the auxiliary configuration module, one end of a vibration sensor IC4 is connected to an IO1 end pin of the single-chip microcomputer IC1, and the other end of the vibration sensor IC4 is grounded. The OLED display module IC2 is connected to an I2C port of the single chip microcomputer IC1; the TF card or seat IC5 is connected to an SPI (Serial Peripheral Interface) port of the singlechip IC1; the remote alarm output USB interface Jout is used for being connected with a Bluetooth module, a WiFi module, a USB serial port cable and other devices which adopt USB plugs. The problems that a USB port of a host is damaged and illegal equipment access is prevented are solved.

Description

Technical Field

[0001] The invention relates to the technical field of power protection, in particular to a USB hub device with a safety control function. Background Art

[0002] In daily work, large-capacity devices, such as mobile phones and power banks, are often connected to work computers for charging, causing damage to the computer's USB port or even the motherboard. On the other hand, there are many reports abroad that hacker software accesses the host through illegal USB devices (special USB flash drives, keyboards, mice, etc.) and invades sensitive intranet systems through automatic keyboard and mouse operations. Therefore, it is urgent to develop a USB hub with security control functions to achieve overcurrent protection and alarm functions to prevent damage to the host's USB port, identify safe mice, keyboards, USB flash drives, printers and other devices by analyzing USB data packets, and prevent illegal devices from accessing, and can set device access conditions through USB feature data packets, such as refusing automatic input of USB data without regular mouse and keyboard operation vibration keyboard and mouse events. Summary of the invention

[0003] In order to solve the problem that large-capacity devices, such as mobile phones, power banks, etc., are often connected to work computers for charging in daily work, causing damage to the computer's USB port or even the motherboard. There are also many reports abroad that hacker software accesses the host through illegal USB devices, specially made U disks, keyboards, mice, etc., and invades sensitive intranet systems through automatic keyboard and mouse operations.

[0004] The present invention provides a USB hub device with a safety control function, comprising: a hub module and an auxiliary configuration module;

[0005] The hub module includes: the USB hub chip IC3 is connected to the USB socket J1 of the host computer through the USBDMup and USBDPup pins, the Vcc pin of the USB hub chip IC3 is connected to one end of the electronic switch K1, the other end of the electronic switch K1 is connected to the USB socket J1 of the host computer, the current sensor L1 is installed on the connection line between the power pin of the USB socket J1 of the host computer and the power pin of the USB hub chip IC3, and the USB socket J1 of the host computer is connected to the host computer through the USB cable; the positive electrode of the current sensor L1 is connected to the AD1 pin of the single-chip microcomputer IC1, and the negative electrode of the current sensor L1 is grounded, which is used to sense the total load current of the host USB port, and is monitored in real time by the single-chip microcomputer IC1 through AD sampling. When the total load current exceeds the limit, the single-chip microcomputer first sends an alarm to the host computer through the remote alarm output USB interface Jout, and then disconnects the USB power line through the electronic switch K1 to protect the host computer from being damaged by excessive current. The single-chip microcomputer IC1 records the alarm event on the TF card or the socket IC5;

[0006] The auxiliary configuration module includes: one end of the detection switch in the vibration sensor IC4 is connected to the IO1 terminal of the single-chip computer IC1, and the other end is grounded, which is used to sense the vibration generated when the standard mouse and keyboard are manually operated, and the single-chip computer performs real-time monitoring through IO status polling, and judges whether the vibration frequency meets the range of normal manual operation according to the characteristic value. The USB keyboard and mouse event message without vibration or abnormal vibration frequency is prohibited from being transmitted to the host computer, and an alarm signal is transmitted to the remote side, and the alarm event is recorded in the TF card at the same time; the OLED display module IC2 is connected to the I2C port of the single-chip computer IC1, which is used to display operation information, configuration information, help information, alarm information, etc. in real time; the TF card or socket IC5 is connected to the SPI port of the single-chip computer IC1, which is used to store digital certificates, record operation logs, storage device configuration information, alarm events, etc.; the micro lock switch K2 is used to configure the single-chip computer IC1 function; the remote alarm output USB interface Jout is used to connect Bluetooth modules, WiFi modules, USB serial cables and other devices using USB plugs, so as to realize the real-time transmission of alarm signals to the monitoring end.

[0007] In a preferred embodiment, the electronic switch K1 is designed as a normally open MOS switch, which is closed by the microcontroller when powered on and disconnected by the microcontroller when overloaded or when an abnormality occurs in the USB communication message, thereby completing the functions of overload protection and preventing illegal USB devices from invading the host computer.

[0008] In a preferred embodiment, the lower computer has multiple USB sockets Jinx, and Jin1 is connected to the USBDMin1 and USBDPin1 pins of the USB hub chip IC3.

[0009] In a preferred embodiment, the USB socket Jinx of the lower computer is connected to the USBDMinx and USBDPinx pins of the USB hub chip IC3, and multiple USB devices are connected to the host through IC3.

[0010] In a preferred embodiment, the micro lock switch K2 requires a corresponding key to be opened.

[0011] In a preferred embodiment, the microcontroller IC1 further confirms the legitimacy of the key by detecting a characteristic resistance on the key.

[0012] In a preferred manner, the microcontroller IC1 determines the function selected by the user according to the closing time of the micro lock switch K2. When the user sees the required item in the function list or set value output by the microcontroller IC1 through the OLED display module IC2, the micro lock switch is promptly disconnected.

[0013] The beneficial effects of the present invention are as follows: the device of the present invention can disconnect the USB overload current to protect the USB port and the mainboard of the host from being damaged, can reject the access of illegal USB devices by identifying the legitimacy of USB communication messages and the vibration frequency during mouse and keyboard operations, thereby preventing illegal USB devices from invading the host; the device can work only after reading a legal digital certificate, has high self-security, and also has the functions of real-time monitoring, recording operation logs, and remote alarm, and has broad application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structural principle of the present invention. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0016] Embodiment 1:

[0017] See also Figure 1A USB hub with security control function is composed of a single-chip microcomputer IC1, a USB hub chip IC3, a current sensor IC4, an electronic switch K1, a host computer USB socket J1, three slave computer USB sockets (Jin1, Jin2, Jin3), a vibration sensor IC4, an OLED display module IC2, a TF card or socket IC5, a micro lock switch K2, and a remote alarm output USB interface Jout. The current sensor is installed on the connection line between the power supply terminal of the host computer USB socket and the power supply terminal of the USB hub chip, and is used to sense the total load current of the USB. The single-chip microcomputer monitors the current in real time through AD sampling. When the time limit is exceeded, the single-chip microcomputer first sends an alarm to the remote, and then disconnects the USB power line through the electronic switch to protect the host computer from being damaged by excessive current. At the same time, the single-chip microcomputer records the alarm event on the TF card. The electronic switch is designed as a normally open MOS switch, which is closed by the single-chip microcomputer when powered on. When overload or USB communication message is abnormal, the single-chip microcomputer disconnects it, thereby completing the function of overload protection and preventing illegal USB devices from invading the host computer. The vibration sensor is used to sense the vibration generated when the standard mouse and keyboard are manually operated, and the single-chip microcomputer monitors it in real time through AD sampling. According to the characteristic value, it is judged whether the vibration frequency is within the range of normal manual operation. The USB keyboard and mouse event message without vibration or abnormal vibration frequency is prohibited from being transmitted to the host computer, and the alarm signal is transmitted to the remote side, and the alarm event is recorded in the TF card. The OLED display module is used to display operation information, configuration information, help information, alarm information, etc. in real time. The TF card or socket IC5 is used to record operation records, alarm events, etc. The micro lock switch is used to configure the microcontroller function. The micro lock switch requires the corresponding key to open. The single-chip microcomputer also further confirms the legitimacy of the key by detecting the characteristic resistance on the key. The single-chip microcomputer determines the function selected by the user according to the closing time of the micro lock switch. When the user sees the required item according to the function list or set value output by the single-chip microcomputer through the OLED display module, the micro lock switch is disconnected in time. The TF card or socket IC5 is used to store digital certificates, record operation logs, and storage device configuration information. The remote alarm output USB interface is connected to the USB serial cable and other devices using a USB plug to realize the function of transmitting the alarm signal to the monitoring end in real time.

[0018] Embodiment 2:

[0019] A USB hub device with a safety control function, comprising: a hub module and an auxiliary configuration module;

[0020] The hub module includes: the USB hub chip IC3 is connected to the USB socket J1 of the host computer through the USBDMup and USBDPup pins, the Vcc pin of the USB hub chip IC3 is connected to one end of the electronic switch K1, the other end of the electronic switch K1 is connected to the USB socket J1 of the host computer, the current sensor L1 is installed on the connection line between the power pin of the USB socket J1 of the host computer and the power pin of the USB hub chip IC3, and the USB socket J1 of the host computer is connected to the host computer through the USB cable; the positive electrode of the current sensor L1 is connected to the AD1 pin of the single-chip microcomputer IC1, and the negative electrode of the current sensor L1 is grounded, and the single-chip microcomputer IC1 monitors in real time through AD sampling. When the total load current exceeds the limit, the single-chip microcomputer first sends an alarm to the host computer through the remote alarm output USB interface Jout, and then disconnects the USB power line through the electronic switch K1, and the single-chip microcomputer IC1 records the alarm event on the TF card or the socket IC5;

[0021] The auxiliary configuration module includes: one end of the detection switch in the vibration sensor IC4 is connected to the IO1 terminal of the single-chip microcomputer IC1, and the other end is grounded, and the single-chip microcomputer performs real-time monitoring through IO status polling; the OLED display module IC2 is connected to the I2C port of the single-chip microcomputer IC1; the TF card or socket IC5 is connected to the SPI port of the single-chip microcomputer IC1; the micro lock switch K2 is used to configure the function of the single-chip microcomputer IC1; the remote alarm output USB interface Jout is used to connect Bluetooth modules, WiFi modules, USB serial cables and other devices using USB plugs.

[0022] The electronic switch K1 is designed as a normally open MOS switch, which is closed by the microcontroller when the power is on. When there is an overload or an abnormality in the USB communication message, the microcontroller disconnects it, thus completing the functions of overload protection and preventing illegal USB devices from invading the host computer.

[0023] The lower computer has multiple USB sockets Jinx, and Jin1 is connected to the USBDMin1 and USBDPin1 pins of the USB hub chip IC3.

[0024] The USB socket Jinx of the lower computer is connected to the USBDMinx and USBDPinx pins of the USB hub chip IC3, and multiple USB devices are connected to the host through IC3.

[0025] The micro lock switch K2 requires a corresponding key to open.

[0026] The microcontroller IC1 further confirms the legitimacy of the key by detecting the characteristic resistance on the key.

[0027] The single chip microcomputer IC1 determines the function selected by the user according to the closing time of the micro lock switch K2. When the user sees the required item according to the function list or set value output by the single chip microcomputer IC1 through the OLED display module IC2, the user promptly disconnects the micro lock switch.

[0028] Finally, it should be noted that the above content is only used to illustrate the technical solution of the present invention, rather than to limit the scope of protection of the present invention. Simple modifications or equivalent substitutions of the technical solution of the present invention by ordinary technicians in this field do not deviate from the essence and scope of the technical solution of the present invention.

Claims

1. A USB hub device with security control function, characterized in that: include: Hub module and auxiliary configuration module; The hub module includes: the USB hub chip IC3 is connected to the USB socket J1 of the host computer through the USBDMup and USBDPup pins, the Vcc pin of the USB hub chip IC3 is connected to one end of the electronic switch K1, the other end of the electronic switch K1 is connected to the USB socket J1 of the host computer, the current sensor L1 is installed on the connection line between the power pin of the USB socket J1 of the host computer and the power pin of the USB hub chip IC3, and the USB socket J1 of the host computer is connected to the host computer through the USB cable; the positive electrode of the current sensor L1 is connected to the AD1 pin of the single-chip microcomputer IC1, and the negative electrode of the current sensor L1 is grounded, and the single-chip microcomputer IC1 monitors in real time through AD sampling. When the total load current exceeds the limit, the single-chip microcomputer first sends an alarm to the host computer through the remote alarm output USB interface Jout, and then disconnects the USB power line through the electronic switch K1, and the single-chip microcomputer IC1 records the alarm event on the TF card or the socket IC5; The auxiliary configuration module includes: one end of the detection switch in the vibration sensor IC4 is connected to the IO1 terminal of the single-chip microcomputer IC1, and the other end is grounded, and the single-chip microcomputer performs real-time monitoring through IO status polling; the OLED display module IC2 is connected to the I2C port of the single-chip microcomputer IC1; the TF card or socket IC5 is connected to the SPI port of the single-chip microcomputer IC1; the micro lock switch K2 is used to configure the function of the single-chip microcomputer IC1; the remote alarm output USB interface Jout is used to connect Bluetooth modules, WiFi modules, USB serial cables and other devices using USB plugs.

2. The USB hub device with security control function according to claim 1, characterized in that: The electronic switch K1 is designed as a normally open MOS switch, which is closed by the microcontroller when the power is on. When there is an overload or an abnormality in the USB communication message, the microcontroller disconnects it, thus completing the functions of overload protection and preventing illegal USB devices from invading the host computer.

3. The USB hub device with security control function according to claim 1, characterized in that: The lower computer has multiple USB sockets Jinx, and Jin1 is connected to the USBDMin1 and USBDPin1 pins of the USB hub chip IC3.

4. The USB hub device with security control function according to claim 3, characterized in that: The USB socket Jinx of the lower computer is connected to the USBDMinx and USBDPinx pins of the USB hub chip IC3, and multiple USB devices are connected to the host through IC3.

5. The USB hub device with security control function according to claim 1, characterized in that: The micro lock switch K2 requires a corresponding key to open.

6. The USB hub device with security control function according to claim 5, characterized in that: The microcontroller IC1 further confirms the legitimacy of the key by detecting the characteristic resistance on the key.

7. The USB hub device with security control function according to claim 5, characterized in that: The single chip microcomputer IC1 determines the function selected by the user according to the closing time of the micro lock switch K2. When the user sees the required item according to the function list or set value output by the single chip microcomputer IC1 through the OLED display module IC2, the user promptly disconnects the micro lock switch.

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