CN219179924U - Automatic switching device for connection interfaces - Google Patents

Abstract

The utility model relates to an automatic switching device of a connection interface, which comprises an uplink USB device and a downlink USB device, wherein the uplink USB device comprises 2 uplink USB interfaces, a DC12V interface, an uplink Aux interface, an uplink SD card interface and a communication interface which are arranged on an uplink circuit board, the DC12V interface is externally connected with a power supply, the downlink USB device comprises 12 downlink USB interfaces, a downlink Aux interface and a downlink SD card interface which are arranged on a downlink circuit board, the uplink USB device and the downlink USB device are connected through a switching unit, and the switching unit comprises a USB switching module, an Aux switching module and an SD switching module; each uplink USB interface is connected with any one downlink USB interface through a USB switching module, the uplink Aux interface is connected with the downlink Aux interface through the Aux switching module, the uplink SD card interface is connected with the downlink SD card interface through the SD switching module, and the uplink USB device is connected with the test unit through a communication line. The utility model can improve the working efficiency of the test.

Description

Automatic switching device for connection interfaces

Technical Field

The present utility model relates to an automatic switching device for a connection interface, and more particularly, to a switching device for a USB interface.

Background

In the field of automation control, communication is generally required between single units of equipment or between single boards in a single unit; the communication interfaces which are commonly used are an RS232 interface, an RS422/485 interface, a CAN interface and the like, and each single machine or each single board communicates with a specific communication protocol through the communication interfaces; this is a problem in that, because each single machine or each single board may be inconsistent in terms of production progress due to various reasons, some single machines or single boards are produced first, and when a communication protocol is required to be debugged, the single machines or single boards matched with the single machines or single boards are not available. In this case, a host computer (PC) is generally used to simulate the matched single machine or single board for performing the interface modulation, however, the external interface of the host computer has a few forms and single function, and the most commonly used interface is a USB interface, which is not matched with the interface on the single machine or single board to be debugged.

The patent is searched: a multifunctional interface switching device (CN 201910420744.1) based on a USB interface, which comprises a first USB interface, a first USB controller, a processor, an RS232 interface conversion circuit, an RS422/485 interface conversion circuit and a CAN interface conversion circuit; the first USB interface is connected with the processor through the first USB controller; the first path of UART port of the processor is connected with the RS232 interface conversion circuit, the second path of UART port is connected with the RS422/485 interface conversion circuit, and the CAN port is connected with the CAN interface conversion circuit; any one or more protocol data of RS232 protocol data, RS422/485 protocol data and CAN bus data CAN be selectively output, and the multiple protocol data CAN be simultaneously output, so that the requirement of data interaction between an upper computer and one or more devices to be tested with different communication interfaces through a USB interface is met. The structure aims at the USB interface, the number of connections is small, and the connection cannot be communicated with other interfaces, so that the test efficiency is low.

Disclosure of Invention

In order to solve the technical problems, the utility model aims to provide an automatic switching device for a connection interface.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the automatic switching device of the connection interface comprises an uplink USB device and a downlink USB device, wherein the uplink USB device comprises 2 uplink USB interfaces, a DC12V interface, an uplink Aux interface, an uplink SD card interface and a communication interface which are arranged on an uplink circuit board, the DC12V interface is externally connected with a power supply, the downlink USB device comprises 12 downlink USB interfaces, downlink Aux interfaces and downlink SD card interfaces which are arranged on a downlink circuit board, the uplink USB device and the downlink USB device are connected through a switching unit, and the switching unit comprises a USB switching module, an Aux switching module and an SD switching module; each uplink USB interface is connected with any one downlink USB interface through a USB switching module, the uplink Aux interface is connected with the downlink Aux interface through the Aux switching module, the uplink SD card interface is connected with the downlink SD card interface through the SD switching module, and the uplink USB device is in communication connection with the test unit through a communication line.

Preferably, the test unit is a single chip microcomputer, and the model of the test unit is STM32F030R8Tx.

Preferably, the uplink USB device is in communication connection with the unit machine through RS 232.

Preferably, the type of the USB transfer module is TS3DS10224.

Preferably, the automatic switching device for the connection interface is characterized in that the model number of the Aux switching module is TS3A27518EPW.

Preferably, in the automatic switching device for a connection interface, the SD switching module is of a model TS3a27518EPW.

By means of the scheme, the utility model has at least the following advantages:

the utility model realizes the switching from 2 usb interfaces to 12 usb interfaces through the switching unit, thereby realizing two hosts and testing 12 different usb terminal devices, effectively improving the working efficiency and achieving the purpose of reducing the cost.

The foregoing description is only an overview of the present utility model, and is intended to provide a better understanding of the present utility model, as it is embodied in the following description, with reference to the preferred embodiments of the present utility model and the accompanying drawings.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a circuit diagram of the connection between the SCM and the upstream USB device;

FIG. 3 is a circuit diagram illustrating the switching between the upstream USB interface and the downstream USB interface according to the present utility model;

FIG. 4 is a circuit diagram of an SD card interface switch according to the present utility model;

fig. 5 is a diagram of an Aux interface switching circuit of the present utility model.

Detailed Description

For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, which are generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present application, as provided in the accompanying drawings, is not intended to limit the scope of the application, as claimed, but is merely representative of selected embodiments of the application. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the present application, it should be noted that, the terms "vertical," "horizontal," "inner," "outer," and the like indicate an azimuth or a positional relationship based on the azimuth or the positional relationship shown in the drawings, or an azimuth or the positional relationship that the product of the application is conventionally put in use, merely for convenience of description and simplification of the description, and do not indicate or imply that the apparatus or element to be referred to must have a specific azimuth, be configured and operated in a specific azimuth, and therefore should not be construed as limiting the present application. Furthermore, the terms "first," "second," and the like, are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal," "vertical," and the like do not denote a requirement that the component be absolutely horizontal or vertical, but rather may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present application, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art in a specific context.

Examples

As shown in fig. 1 to 5, an automatic switching device for connection interfaces includes an uplink USB device 1 and a downlink USB device 2, the uplink USB device 1 includes 2 uplink USB interfaces 11, a DC12V interface 12, an uplink Aux interface 13, an uplink SD card interface 14 and a communication interface 15, which are mounted on an uplink circuit board, the DC12V interface 12 is externally connected with a power supply, the downlink USB device 2 includes 12 downlink USB interfaces 21, a downlink Aux interface 22 and a downlink SD card interface 23, which are mounted on a downlink circuit board, the uplink USB device 1 and the downlink USB device 2 are connected through a switching unit 3, and the switching unit 3 includes a USB switching module 31, an Aux switching module 32 and an SD switching module 33; each upstream USB interface 11 is connected to any downstream USB interface 21 through a USB switching module 31, the upstream Aux interface 13 is connected to the downstream Aux interface 22 through an Aux switching module 32, the upstream SD card interface 14 is connected to the downstream SD card interface 23 through an SD switching module 33, and the upstream USB device 1 is communicatively connected to the test unit 4 through a communication line.

In the utility model, the test unit 4 is a singlechip, and the model of the singlechip is STM32F030R8Tx.

In the utility model, the uplink USB device 1 is in communication connection with the unit machine through RS232 and is carried out through an RS232 serial port instruction, and a DB-9 female connector is used for serial ports. The baud rate was 9600bps.

In the present utility model, the type of the USB transfer module 31 is TS3DS10224, the type of the Aux transfer module 32 is TS3a27518EPW, and the type of the SD transfer module 33 is TS3a27518EPW.

Each uplink USB interface can be connected to a port of any downlink USB interface, but cannot be connected to the same downlink USB interface at the same time, and cannot be connected to two uplink USB interfaces at the same time, and the product is transferred through different transfer, so that transfer of one SD card and transfer of one Aux port are supported at the same time.

The detection mode is to detect the USB interface device on the downstream USB apparatus through a detection device (a device known to those skilled in the art) at the back end.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, and it should be noted that it is possible for those skilled in the art to make several improvements and modifications without departing from the technical principle of the present utility model, and these improvements and modifications should also be regarded as the protection scope of the present utility model.

Claims (6)

1. An automatic switching device for a connection interface comprises an uplink USB device (1) and a downlink USB device (2), wherein the uplink USB device (1) comprises 2 uplink USB interfaces (11), a DC12V interface (12), an uplink Aux interface (13), an uplink SD card interface (14) and a communication interface (15) which are arranged on an uplink circuit board, the DC12V interface (12) is externally connected with a power supply, the downlink USB device (2) comprises 12 downlink USB interfaces (21), a downlink Aux interface (22) and a downlink SD card interface (23) which are arranged on a downlink circuit board,

the method is characterized in that: the uplink USB device (1) and the downlink USB device (2) are connected through a switching unit (3), and the switching unit (3) comprises a USB switching module (31), an Aux switching module (32) and an SD switching module (33); each uplink USB interface (11) is connected with any downlink USB interface (21) through a USB switching module (31), each uplink Aux interface (13) is connected with a downlink Aux interface (22) through an Aux switching module (32), each uplink SD card interface (14) is connected with a downlink SD card interface (23) through an SD switching module (33), and each uplink USB device (1) is connected with a test unit (4) through a communication line.

2. The automatic switching device for a connection interface according to claim 1, wherein: the test unit (4) is a singlechip, and the model of the test unit is STM32F030R8Tx.

3. The automatic switching device for a connection interface according to claim 1, wherein: the uplink USB device (1) is in communication connection with the unit machine through RS 232.

4. The automatic switching device for a connection interface according to claim 1, wherein: the model of the USB switching module (31) is TS3DS10224.

5. The automatic switching device for a connection interface according to claim 1, wherein: the Aux switching module (32) is of the model TS3A27518EPW.

6. The automatic switching device for a connection interface according to claim 1, wherein: the model of the SD transfer module (33) is TS3A27518EPW.

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