Equipment capable of expanding multiple paths of USB (Universal Serial Bus) signals and IO (Input / Output)

Abstract

The utility model relates to equipment capable of expanding multiple paths of USB (Universal Serial Bus) signals and IO (Input / Output), and provides an expandable device for navy equipment, so that the expansion of the multiple paths of USB signals and the multiple paths of I / O can be realized, and the requirement of a peripheral module of the navy equipment is met. Comprising an external shell and an internal circuit, the external shell is provided with external interfaces, and the external interfaces comprise a power input interface, an uplink USB interface, an expansion USB interface and an I / O and DC power output interface; the power supply input interface is used for accessing an external power supply, the uplink USB interface is used for connecting a computer USB interface, the expansion USB interface is used for connecting an equipment control module, a direct current power supply is provided for external equipment through the ports, the I / O and the direct current power supply output interface have current driving capability, and the internal circuit comprises a rectification filter circuit board. And a power conversion board and an expansion control board.

Description

Technical Field

[0001] The utility model belongs to the field of electrical control equipment, in particular to naval equipment with expandable multi-channel interfaces. Background Art

[0002] USB interfaces are now essential for computer peripherals. Naval equipment often requires multiple USB modules, including programmable touch keyboards, standard keyboards, numeric keypads, trackballs, joysticks, spreadsheet displays, and user-specific keys. Furthermore, naval equipment requires multiple I / O ports to drive indicators, buzzers, and other functions. However, there is currently a lack of solutions for implementing multiple USB signals and I / O expansion. Utility Model Content

[0003] In view of this, the utility model provides a device that can expand multiple USB signals and IOs, providing a scalable device for naval equipment, which can realize multi-channel USB signal and multi-channel I / O expansion to meet the needs of naval equipment peripheral modules.

[0004] The specific technical solutions are as follows:

[0005] A device capable of expanding multiple USB signals and I / O, comprising an external housing and internal circuitry, wherein the external housing is provided with external interfaces, including a power input interface, an upstream USB interface, an extended USB interface, and I / O and DC power output interfaces; the power input interface is used to connect to an external power source, the upstream USB interface is used to connect to a computer USB interface, and the extended USB interface is used to connect to a device control module, while simultaneously providing DC power to external devices through the ports; the I / O and DC power output interfaces have current driving capabilities; and the internal circuitry comprises a rectifier and filter circuit board, a power conversion board, and an extended control board.

[0006] Furthermore, the external shell includes 1 power input interface, 1 upstream USB interface, 6 expansion USB interfaces, 6 I / O and DC power output interfaces.

[0007] Furthermore, the upstream USB interface receives status instructions from the computer system, and the I / O and DC power output interfaces output level drive devices according to the status instructions from the computer system, and the devices include indicator lights and buzzers.

[0008] Furthermore, the device control module includes a programmable touch keyboard, a standard keyboard, a numeric keypad, a trackball, a joystick, a page display, and a touch screen.

[0009] Furthermore, the rectifier and filter circuit board is used to filter the external power supply; the power conversion board is used to convert the external power supply; the expansion control board includes a USB control circuit and an I / O circuit. The USB control circuit is used to expand one USB input into multiple USB outputs. The USB control circuit uses a USB2517 chip; the I / O circuit is used to convert one USB output in the USB control circuit into multiple I / Os. The I / O circuit includes a CH372, a single-chip microcomputer and a drive circuit.

[0010] Beneficial effects

[0011] 1. This device receives USB signals from the computer system and expands them into 6-way USB signals to communicate with naval equipment control modules (such as standard keyboards, trackballs, page displays, touch screens, etc.) via USB.

[0012] 2. In addition, the computer sends status instructions through this device to drive the indicator lights and buzzers on the naval equipment table. The power supply in the device is converted from 220V to 12V and 5V, which are used to power the 6-way USB devices and indicator lights and buzzers respectively.

[0013] 3. When a fault occurs, the utility model is easy to replace and repair. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 Schematic diagram of the internal circuit of the utility model

[0015] Figure 2 Principle block diagram of this utility model

[0016] Figure 3 I / O circuit block diagram DETAILED DESCRIPTION

[0017] The device for expanding USB signals and I / O consists of an external housing and an internal circuit module. The external housing is equipped with an external interface connector and provides fixing screws for the internal circuit printed circuit board. The internal circuit consists of the following three parts: rectifier filter circuit board, power conversion board and expansion control board. The block diagram is as follows Figure 1 shown.

[0018] This device contains the following interfaces:

[0019] a) 1 power input interface, providing 220V power to the USB expansion module;

[0020] b) 1 uplink USB port, used to connect to the computer USB port;

[0021] c) 6-way extended USB interface, used to connect USB external devices and provide DC power to external devices through this port;

[0022] d) 6-channel I / O and DC power output interface, each I / O and DC power output interface has a 100mA current driving capability (low level). After receiving the command signal from the host USB port, the USB expansion module can make a specified I / O low to drive the external load circuit (indicator light or buzzer) to work. When the I / O becomes high, the external load circuit does not work.

[0023] This device is used to expand one USB port into six USB ports and six I / O ports. It can achieve:

[0024] e) USB external devices such as programmable touch keyboard, standard keyboard, numeric keypad, trackball, joystick, page display, user-specific key module, etc. can exchange data with the computer through the USB module;

[0025] f) The computer system sends status instructions through the USB interface, and the USB expansion module receives and interprets them and drives the indicator lights, buzzers, etc. on the device surface through the I / O interface;

[0026] g) Provide 5V / 10A and 12V / 6A power supplies for each peripheral device.

[0027] The device consists of an external shell and an internal circuit module. The internal circuit consists of the following three parts: rectifier filter circuit board, circuit conversion board and expansion control board. The specific schematic diagram is as follows Figure 2 shown.

[0028] h) Rectifier filter circuit board: Use widely used filter circuit to avoid signal interference affecting the normal operation of the device, which not only protects the internal circuit but also increases the anti-interference ability of the system.

[0029] i) Power conversion board: The power conversion board converts AC 220V power into DC 12V and 5V power, providing stable power output to the expansion control board and external USB devices.

[0030] j) Expansion control board: The expansion control board consists of two parts: a USB control circuit based on the USB2517 hub and an I / O circuit. It is the core functional circuit of the entire expansion module. The control circuit uses the USB2517 chip to realize the function of expanding one USB input port into seven USB output ports. Each USB output port is connected to a light-emitting diode, and the state of the light-emitting diode can be used to determine which USB has a problem. The I / O circuit part converts one USB output port in the control circuit into six I / O ports, which is achieved through the chip CH372 in conjunction with the single-chip microcomputer and the drive circuit (transistor stack). Write the IO control program in the single-chip microcomputer circuit, and set any one of the six I / O terminals to a low level to light up the external indicator light. The principle of the I / O circuit is as follows Figure 3 shown.

Claims

1. A device capable of expanding multiple USB signals and IO, characterized by: It includes an external shell and an internal circuit, wherein the external shell is provided with an external interface, which includes a power input interface, an upstream USB interface, an extended USB interface, and an I / O and DC power output interface; the power input interface is used to connect to an external power supply, the upstream USB interface is used to connect to a computer USB interface, and the extended USB interface is used to connect to a device control module. At the same time, DC power is provided to external devices through the extended USB interface. The I / O and DC power output interfaces have current driving capabilities. The internal circuit includes a rectifier and filter circuit board, a power conversion board and an extended control board.

2. The device capable of expanding multiple USB signals and IOs according to claim 1, wherein: The external shell contains 1 power input interface, 1 upstream USB interface, 6 expansion USB interfaces, 6 I / O and DC power output interfaces.

3. The device capable of expanding multiple USB signals and IOs according to claim 1, wherein: The upstream USB interface receives status instructions from the computer system, and the I / O and DC power output interface outputs level drive devices according to the status instructions issued by the computer system. The devices include indicator lights and buzzers.

4. The device capable of expanding multiple USB signals and IOs according to claim 1, wherein: The device control module includes a programmable touch keyboard, a standard keyboard, a numeric keypad, a trackball, a joystick, a page display, and a touch screen.

5. The device for expanding multiple USB signals and IOs according to any one of claims 1 to 4, characterized in that: The rectifier and filter circuit board is used to filter the external power supply; the power conversion board is used to convert the external power supply; the expansion control board includes a USB control circuit and an I / O circuit. The USB control circuit is used to expand one USB input into multiple USB outputs. The USB control circuit uses a USB2517 chip; the I / O circuit is used to convert one USB output in the USB control circuit into multiple I / Os. The I / O circuit includes a CH372, a single-chip microcomputer and a drive circuit.

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