Novel isolated signal input circuit

Abstract

The utility model relates to a novel isolation type signal input circuit, which belongs to the technical field of digital ink-jet printers and comprises a communication plate, the communication plate comprises a master control board card and a slave board card, the master control board card and the slave board card are connected through signals, the master control board card is used for master control of communication, and the slave board card is used for slave control of communication. The slave board card is used for receiving information; according to the scheme, the sending end adopts a structure of two-channel sending and one-channel receiving, the receiving end adopts configuration of one-channel sending and two-channel receiving, the sending end provides high transmission capacity in a two-channel sending mode, and meanwhile two-way transmission of data is effectively achieved through one-channel receiving; at a receiving end, the configuration of the first channel sending and the second channel receiving emphasizes the attention on the received signal, so that the information transmitted from different directions can be efficiently received and processed; the communication bandwidth of the system is expanded by increasing the number of communication ports, and the communication requirements in different scenes are further met.

Description

Technical Field

[0001] The utility model belongs to the technical field of digital inkjet printers, and in particular relates to a novel isolated signal input circuit. Background Art

[0002] Traditional printers have always used Ethernet communication for communication between panels, and the specific communication media include 100MHz network cables and 1G optical fibers. Ethernet communication has advantages in terms of ease of use, performance, and reliability in engineering implementation, but there is also a problem that cannot be ignored, that is, communication delay is difficult to accurately control. Because Ethernet uses a fixed communication protocol, communication delay can only be controlled at the millisecond level, which is difficult to meet the demand for nanosecond delay. High-speed and low-latency communication is a challenge, especially when dealing with big data communication and synchronization signals. In particular, for synchronization signals, their delay needs to be accurately controlled within 20ns. Secondly, the stability of temperature communication between panels is also an issue that needs to be solved urgently. This stability includes two aspects of consideration: on the one hand, it can provide a maximum transmission distance of 20 meters, and on the other hand, it ensures reliable communication between different ground planes across the power domain of the communication panel. Utility Model Content

[0003] In order to solve the problems in the prior art that the communication delay is difficult to accurately control and the temperature communication stability between plates is poor, the utility model provides a novel isolated signal input circuit.

[0004] The purpose of the utility model can be achieved through the following technical solutions:

[0005] A novel isolated signal input circuit includes a communication plate, wherein the communication plate includes a master control board and a slave board, wherein the master control board and the slave board are connected via a signal, wherein the master control board is used for overall control of communication, and the slave board is used for receiving information;

[0006] Both the master control board and the slave board are control cards, and the control card is provided with a synchronous input terminal, a synchronous output terminal, a cascade input terminal, a cascade output terminal, a transmitting terminal, a receiving terminal and a differential transmission switching terminal; the transmitting terminal adopts a structure of 2-channel transmission and 1-channel reception, and the receiving terminal adopts a configuration of 1-channel transmission and 2-channel reception; the communication part of the communication section includes a broadcast communication part and a cascade communication part.

[0007] Preferably, the input circuit adopts a modular design, and the number of communication ports can be increased or decreased as needed.

[0008] Preferably, the communication section is provided with a master control board and a plurality of slave boards, and the upper limit of the number of the slave boards is set to 64.

[0009] Preferably, the broadcast communication part includes a main control board sending synchronization information to all slave boards to achieve low-latency synchronization information transmission; the cascade communication part is used to achieve high-speed data communication between boards, and the high-speed data communication is transmitted step by step by the main control board.

[0010] Preferably, the input circuit also includes a high-speed photoelectric isolation circuit and a power supply isolation circuit, which are used to ensure that the boards can withstand a larger common mode voltage.

[0011] Preferably, the synchronization input terminal is communicatively connected to the differential transmission switching terminal for data signal transmission; the cascade input terminal is connected to the receiving terminal, and the cascade output terminal is connected to the transmitting terminal.

[0012] Preferably, a low voltage differential signal driver chip and a differential transceiver chip are also provided in the input circuit.

[0013] The beneficial effects of the utility model are:

[0014] The design of this solution is that the transmitting end adopts a structure of 2 channels for sending and 1 channel for receiving, while the receiving end adopts a configuration of 1 channel for sending and 2 channels for receiving. This design not only meets general communication needs, but also provides a flexible solution for future system expansion. By increasing the number of communication ports, the system communication bandwidth is expanded to meet the demand for larger communication bandwidth, and further meet the communication needs in different scenarios.

[0015] In this solution, the transmitter provides a higher transmission capacity by sending through 2 channels, and receives through 1 channel, effectively realizing the two-way transmission of data. On the receiving end, the configuration of 1 channel sending and 2 channels receiving emphasizes the importance of receiving signals, ensuring that information from different directions can be efficiently received and processed. This design not only optimizes the performance of the communication system, but also provides strong support for further upgrading and expansion of the system.

[0016] The modular design adopted in this solution allows the number of communication ports to be flexibly increased or decreased. This means that the system can easily cope with data-intensive applications or the pursuit of higher communication bandwidth, and achieve a wider range of communication capacity while maintaining communication quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to facilitate understanding by those skilled in the art, the present invention is further described below in conjunction with the accompanying drawings.

[0018] Figure 1 A block cascade architecture diagram of a novel isolated signal input circuit provided in one embodiment of the utility model;

[0019] Figure 2-Figure 3 A schematic diagram of broadcast communication and cascade communication in a novel isolated signal input circuit provided in one embodiment of the utility model;

[0020] Figure 4 The present invention is a data isolation circuit diagram in a novel isolated signal input circuit provided in one embodiment of the present invention. DETAILED DESCRIPTION

[0021] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined purpose of the utility model, the specific implementation method, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0022] A novel isolated signal input circuit, including a communication block, such as Figure 1 As shown, the communication block includes a main control board and a slave board, the main control board and the slave board are connected by signals, the main control board is used for overall control of communication, and the slave board is used for receiving information; the main control board and the slave board are both control cards, and the control card is provided with a synchronous input terminal, a synchronous output terminal, a cascade input terminal, a cascade output terminal, a transmitting terminal, a receiving terminal and a differential transmission switching terminal: the transmitting terminal adopts a structure of 2-channel transmission and 1-channel reception, and the receiving terminal adopts a configuration of 1-channel transmission and 2-channel reception; the communication part of the communication block includes a broadcast communication part and a cascade communication part, which are two key parts in the communication block.

[0023] Broadcast communication is a data communication method that can forward signals to all devices in the broadcast domain of the entire network. The principle of broadcast communication is that the broadcast signal source device sends a data packet to all devices in the network, and each device that receives the data packet processes it accordingly. The key to broadcast communication is the broadcast domain, which refers to the logical address range of all network devices that can receive a specific broadcast signal. In the receiving device, each device checks the destination address of the broadcast data packet to determine whether it should process the data packet. If the address of the receiving device matches the broadcast address, it will process the data packet and perform the corresponding operation.

[0024] The advantages of broadcast communication are that it has a wide coverage, can quickly convey information, can achieve fast broadcasting, and save system operation expenses. Broadcast communication can directly transmit data signals from the output end of the main control board to the input end of the slave board. In order to ensure low energy consumption and high performance signal transmission, the differential signal can be set at the differential transmission switching end. Low voltage differential signal driver chip converts the low voltage differential signal into a differential output signal.

[0025] Cascade communication is a way to connect multiple devices in series for data communication. The principle is to connect multiple devices through a repeater or switch to form a chain structure. The data enters the entry device of the cascade network from the source device and is transmitted to the target device step by step through the repeater or switch. In this embodiment, the cascade input end is connected to the receiving end for communication, and the cascade output end is connected to the sending end for communication, and signal transmission is performed respectively. Since cascade communication requires intermediate devices for transmission, the signal of cascade communication is transmitted at the sending end and the receiving end. The process of signal transmission is carried out one level at a time, so as to ensure that the data is correctly transmitted to the slave board of the next level. Through cascade communication, data can be transmitted from the main control board sequentially through multiple differential transceivers, which expands the distance and coverage of data transmission. In addition, in cascade communication, the differential transceiver chip controls the signal output, which can play the role of data amplification and signal enhancement, thereby overcoming the signal attenuation and noise problems in the data transmission process and ensuring the transmission quality.

[0026] Furthermore, in a preferred embodiment of the present application, with the continuous development of science and technology and the diversification of application scenarios, the demand for communication bandwidth may increase accordingly. In this embodiment, in order to meet this challenge, the input circuit adopts a modular design, and the number of communication ports is increased or decreased as needed. Through the flexible communication port design, the system can easily adapt to different communication needs and provide users with highly customizable solutions. This feature will ensure the advancement and sustainability of the system in a constantly changing technological environment.

[0027] Furthermore, in a preferred embodiment of the present application, the communication section is provided with a master control board, and a plurality of slave boards are provided at the same time, and the upper limit of the number of slave boards is set to 64. Flexible setting of boards can better adapt to different working environments, communication standards and application scenarios. This makes the solution more widely applicable in various applications, providing users with a more flexible and sustainable solution.

[0028] Furthermore, in a preferred embodiment of the present application, the broadcast communication part includes a master control board sending synchronization information to all slave boards to achieve low-latency synchronization information transmission; the cascade communication part is used to achieve high-speed data communication between boards, and the high-speed data communication is transmitted step by step by the master control board. This combination of broadcast communication technology and cascade communication technology effectively solves the problem of low-latency big data communication, making the system delay controllable within 10 nanoseconds.

[0029] Furthermore, in a preferred embodiment of the present application, in order to solve the problem of reliable communication between different ground planes of communication boards across the power domain, high-speed optoelectronic isolation circuits and power isolation technology are introduced to jointly ensure that the boards can withstand a larger common-mode voltage, increasing it from ±7V to ±2KV, thereby effectively improving the stability and reliability of communication.

[0030] Furthermore, in a preferred embodiment of the present application, the synchronization input terminal is communicatively connected to the differential transmission switching terminal for data signal transmission; the cascade input terminal is connected to the receiving terminal, and the cascade output terminal is connected to the transmitting terminal.

[0031] Furthermore, in a preferred embodiment of the present application, since the circuit communication delay is difficult to accurately control, a higher speed and lower power consumption signal transmission is required to reduce the communication delay. The input circuit is also provided with a low voltage differential signal driver chip and a differential transceiver chip. Figure 2-4 As shown in the figure, the schematic diagram of broadcast communication and cascade communication and the data isolation circuit diagram include SN65LVDS047DR, SN65LVDS048DR, ESD0524P and DS90LV019TM. ​​The low voltage differential signal driver chip converts the low voltage differential signal into a differential output signal, thereby achieving high-speed and low-power signal transmission. The low voltage differential signal driver chip has good performance and reliability in the field of industrial data communication, ensuring the efficient transmission of communication data.

[0032] Among them, SN65LVDS047DR supports low voltage differential signal driving, integrates 4 differential drivers, and each driver has a driving capacity of up to 350mW. At the same time, its differential output level range is adjustable, supports high-speed data transmission, supports hot plugging, and enhances the reliability of the system. SN65LVDS048DR is similar to SN65LVDS047DR, but also has an ultra-wide unbalanced input level range, which is suitable for the transmission of different types of signals. The differential output power can be simply adjusted through a smaller compensation capacitor value, and has good electromagnetic interference resistance. ESD0524P supports high differential signal transmission, integrates 1 to 4 differential signal transceiver channels, and has built-in embedded ESD electrostatic protection, which can enhance the ability to resist external noise and improve system reliability. At the same time, it can process high-fidelity services and achieve minimal delay, thereby solving the problem of difficult to accurately control delays. DS90LV019TM is suitable for the transmission and reception of high-speed differential signals, supports low-power design, and is used in battery-powered or other low-power applications. It has high bandwidth, supports high-speed data transmission, and supports single-ended to differential or differential to single-ended signal conversion, meeting the needs of low power consumption and high performance.

[0033] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A novel isolated signal input circuit, characterized in that: It includes a communication plate, which includes a main control board and a slave board. The main control board and the slave board are connected through signals. The main control board is used for overall control of communication, and the slave board is used for receiving information. Both the master control board and the slave board are control cards, and the control card is provided with a synchronous input terminal, a synchronous output terminal, a cascade input terminal, a cascade output terminal, a transmitting terminal, a receiving terminal and a differential transmission switching terminal; the transmitting terminal adopts a structure of 2-channel transmission and 1-channel reception, and the receiving terminal adopts a configuration of 1-channel transmission and 2-channel reception; the communication part of the communication section includes a broadcast communication part and a cascade communication part.

2. A novel isolated signal input circuit according to claim 1, characterized in that: The input circuit adopts a modular design, and the number of communication ports can be increased or decreased as needed.

3. A novel isolated signal input circuit according to claim 1, characterized in that: The communication section is provided with a master control board and a plurality of slave boards, and the upper limit of the number of the slave boards is set to 64.

4. The novel isolated signal input circuit according to claim 1, characterized in that: The broadcast communication part includes a master control board sending synchronization information to all slave boards to achieve low-latency synchronization information transmission; the cascade communication part is used to achieve high-speed data communication between boards, and the high-speed data communication is transmitted step by step by the master control board.

5. The novel isolated signal input circuit according to claim 1, characterized in that: The input circuit also includes a high-speed photoelectric isolation circuit and a power supply isolation circuit, which are used to ensure that the boards bear a larger common mode voltage.

6. The novel isolated signal input circuit according to claim 1, characterized in that: The synchronization input terminal is communicatively connected to the differential transmission switching terminal for data signal transmission; the cascade input terminal is connected to the receiving terminal, and the cascade output terminal is connected to the transmitting terminal.

7. The novel isolated signal input circuit according to claim 1, characterized in that: The input circuit is also provided with a low voltage differential signal driver chip and a differential transceiver chip.

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