CN217655533U

CN217655533U - Multichannel non-delay switching system

Info

Publication number: CN217655533U
Application number: CN202221246931.6U
Authority: CN
Inventors: 徐敏迪; 柴孟阳; 蒋磊磊; 吴真蓉
Original assignee: Nantong Academy of Intelligent Sensing
Current assignee: Nantong Academy of Intelligent Sensing
Priority date: 2022-05-24
Filing date: 2022-05-24
Publication date: 2022-10-25
Anticipated expiration: 2032-05-24

Abstract

The utility model provides a multichannel does not have time delay switching system, can be used to sweep equipment that sign indicating number rifle, shared keyboard, mouse, printer etc. have serial bus interface and need the sharing of many computers and switch, through multichannel does not have time delay switching system, can make a plurality of computers share same equipment together, save equipment use cost; compare simultaneously and can produce signal delay, and unreliable problem in the physics switching of USB port, the utility model provides a switching system has solved the delay problem that USB physics switched the production through adopting HID agreement signal conversion, and the sexual valence relative altitude and reliable and stable provide a solution for sharing equipment is used in batches at industrial field low-cost.

Description

Multichannel non-delay switching system

Technical Field

The utility model relates to a belong to the smart machine field, concretely relates to multichannel does not have time delay switched systems.

Background

With the continuous development of information technology, the man-machine interface device is widely applied from logistics, industrial production, retail sale to medical service. Such as code scanning guns for reading, for example, bar codes and QR codes; such as a mouse, for reading slide information; such as a keyboard for entering key information; the read information is transmitted to the PC, the mobile phone and the controller through the communication interface. As can be seen on various industrial production lines based on PCs, each PC needs to be provided with a scanning gun, a keyboard and a mouse; a single operation unit often sets up a plurality of PCs to meet the requirement of simultaneous production, and the PCs and the devices need one-to-one communication, so that a large amount of devices need to be set up; the idle time is far longer than the time for using the devices, so that the effective utilization rate of the human-computer interface devices is low; and the operator is required to select from a plurality of devices, which affects the working efficiency. The traditional USB switcher performs physical switching on a signal wire, and the USB equipment needs certain enumeration time during switching, which causes certain time delay; the method comprises the following steps that a serial bus interface is used, an analog signal switching chip is used, signals are routed to a protocol chip for converting a plurality of serial bus interfaces into USB HID, and each USB interface corresponds to a PC; because the serial bus signal switching does not need waiting time, and each USB HID protocol chip is in a working state, a multi-channel, delay-free and drive-free switching system can be realized; the quick switching of one man-machine device among a plurality of PCs is realized.

Disclosure of Invention

In view of this, the utility model provides a multichannel does not have time delay switched systems to sharing equipment such as yard rifle, mouse, keyboard, printer is swept in solution so that influence work efficiency and the problem of wasting resources.

In order to achieve the above object, the utility model provides a technical scheme as follows:

a multi-channel non-delay switching system comprises a membrane switch, an MCU chip, a channel switching circuit, a shared device interface, an HID protocol chip and a USB interface;

the membrane switch is electrically connected with the MCU chip and used for sending a switch instruction to the MCU chip;

the MCU chip is electrically connected with the channel switching circuit and used for sending a control instruction to the channel switching circuit;

the input end of the shared device interface is connected with shared devices and used for receiving signals of the shared devices, and the output end of the shared device interface is electrically connected with the channel switching circuit and used for transmitting signals of the shared devices to the channel switching circuit;

the channel switching circuit is electrically connected with the HID protocol chip and used for executing a control instruction and transmitting a shared device signal to the HID protocol chip;

the HID protocol chip is electrically connected with the USB interface and is used for converting a shared device signal into a USB signal and then transmitting the USB signal to the USB interface; the USB interface is connected with the PC end and used for sending a USB signal to the PC end.

Furthermore, the system also comprises a USB interface power supply circuit which is electrically connected with the USB interface and used for supplying power to the USB interface.

Furthermore, the system also comprises a channel indication LED lamp which is connected with the MCU chip and used for displaying the working channel.

Further, the USB interface is arranged in a laminated manner.

Further, the number of the USB interfaces is greater than 1.

Furthermore, each USB interface corresponds to an HID protocol chip; each HID protocol chip corresponds to one channel; each of the channels corresponds to a membrane switch.

Further, the MCU chip selects an intentional semiconductor STM8.

Further, the channel switching circuit selects a 74HC4051 analog multiplexer.

Compared with the prior art, the beneficial effects of the utility model reside in that:

the utility model provides a multichannel does not have time delay switching system can be used to sweep equipment that sign indicating number rifle, shared keyboard, mouse, printer etc. have serial bus interface and need the sharing of many computers and switch, through multichannel does not have time delay switching system, can make a plurality of computers share same equipment together, saves equipment use cost; compare simultaneously and can produce signal delay, and unreliable problem in the physics switching of USB port, the utility model provides a switching system has solved the delay problem that USB physics switched the production through adopting HID agreement signal conversion, and the sexual valence relative altitude and reliable and stable provide a solution for sharing equipment is used in batches at industrial field low-cost.

Drawings

Fig. 1 is a schematic structural diagram of a multi-channel non-delay switching system in an embodiment.

Detailed Description

The technical contents of the preferred embodiments of the present invention will be more clearly understood and appreciated by referring to the drawings attached to the specification. The present invention may be embodied in many different forms of embodiments, and the scope of the invention is not limited to the embodiments described herein.

As shown in fig. 1, this embodiment provides a multi-channel non-delay switching system, which is used to implement interface switching of multiple channels by one sharing device.

The switching system comprises a membrane switch 1, an MCU chip 2, a channel switching circuit 3, a shared device interface 7, an HID protocol chip 4 and a USB interface 5; the membrane switch 1 is electrically connected with the MCU chip 2 and used for sending a switch instruction to the MCU chip 2; the MCU chip 2 is electrically connected with the channel switching circuit 3 and used for sending a control instruction to the channel switching circuit 3; the input end of the shared device interface 7 is connected with the shared device and is used for receiving the signal of the shared device, and the output end of the shared device interface 7 is electrically connected with the channel switching circuit 3 and is used for transmitting the signal of the shared device to the channel switching circuit 3; the channel switching circuit 3 is electrically connected with the HID protocol chip 4 and is used for executing a control instruction and transmitting a sharing device signal to the HID protocol chip 4; the HID protocol chip 4 is electrically connected with the USB interface 5 and is used for converting the shared device signal into a USB signal and then transmitting the USB signal to the USB interface 5; the USB interface 5 is connected to the PC terminal and is used for transmitting a USB signal to the PC terminal.

Optionally, the switching system further includes a USB interface power supply circuit 8 electrically connected to the USB interface 5 for supplying power to the USB interface. The switching system also comprises a channel indication LED lamp 6 which is connected with the MCU chip 2 and used for displaying the working channel.

Optionally, to save space, the USB interface 5 is arranged in a stacked manner.

Optionally, the number of the USB interfaces 5 is greater than 1, so as to implement multi-channel switching.

Preferably, each USB interface 5 corresponds to one HID protocol chip 4; each HID protocol chip corresponds to one channel; one membrane switch for each channel.

In the present embodiment, the MCU chip 3 selects the intentional semiconductor STM8.

In another embodiment, the channel switching circuit is implemented as a 74HC4051 analog multiplexer.

In another embodiment, the channel switching circuit 3 selects 74HC4051 analog multiplexer.

When the multichannel non-delay switching system is used for working, firstly, the membrane switch 1 is pressed down, the MCU chip 2 receives a switching signal, then an instruction is transmitted to the channel switching circuit 3, meanwhile, the corresponding channel indication LED lamp 6 is on, the shared device works at the moment, the channel switching circuit 3 transmits a signal of the shared device to the HID protocol chip 4, the HID protocol chip 4 converts the obtained signal into a USB signal and transmits the USB signal to the USB interface, and finally the USB signal is transmitted to the PC end. The switching of different channels can be carried out by pressing the membrane switches corresponding to the different channels, and the work of finishing a plurality of channels by one sharing device is realized.

The foregoing has described in detail preferred embodiments of the present invention. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the teachings of this invention without undue experimentation. Therefore, the technical solutions that can be obtained by a person skilled in the art through logic analysis, reasoning or limited experiments based on the prior art according to the concepts of the present invention should be within the scope of protection defined by the claims.

Claims

1. A multi-channel non-delay switching system is characterized by comprising a membrane switch, an MCU chip, a channel switching circuit, a shared device interface, an HID protocol chip and a USB interface;

the MCU chip is electrically connected with the channel switching circuit and is used for sending a control instruction to the channel switching circuit;

2. The multi-channel non-delay switching system of claim 1, further comprising a USB interface power supply circuit electrically connected to the USB interface for supplying power to the USB interface.

3. The multi-channel non-delay switching system of claim 1, further comprising a channel indication LED lamp connected to the MCU chip for displaying a working channel.

4. The multi-channel non-delayed switching system of claim 1, wherein the USB interface is arranged in a stack.

5. The multi-channel non-delay switching system according to claim 1, wherein the number of the USB interfaces is greater than 1.

6. The multi-channel non-delay switching system according to claim 5, wherein each of the USB interfaces corresponds to an HID protocol chip; each HID protocol chip corresponds to one channel; each of the channels corresponds to a membrane switch.

7. The multi-channel non-delay switching system of claim 1, wherein the MCU chip selects an intentional semiconductor STM8.

8. The multi-channel non-delay switching system of claim 1, wherein the channel switching circuit is a 74HC4051 analog multiplexer.