Integrated display control terminal

Abstract

The invention provides an integrated display control terminal, a brand new module structure assembly form and an internal signal interconnection method are designed and realized, and the integrated display control terminal comprises a backboard, a front panel and a rear panel; the backboard is provided with a first number of core card slot positions and a second number of IO card slot positions. The back plate is electrically connected with the front panel and the rear panel respectively; the rear panel is connected with external equipment; the front panel is used for receiving a program instruction and sending the program instruction to the processor; the rear panel is used for sending a data signal of external equipment to the IO function card; the backboard is used for receiving a program instruction and sending the program instruction to external equipment; and the processor is also used for receiving a data signal of external equipment and sending the data signal of the external equipment to the processor. The integrated display and control terminal is compact in structure, high in integration and easy to maintain, the size of the display and control terminal is reduced on the premise that the transmission performance of the display and control terminal is reliable, and the cost of the display and control terminal is reduced.

Description

Technical Field

[0001] The present disclosure relates to the field of communication technology, and in particular to an integrated display and control terminal. Background Art

[0002] The backplane and interface circuit of the display and control terminal are the core parts of the entire display and control terminal, responsible for data communication and signal exchange between different modules. The design of the backplane must ensure the integrity, stability and scalability of the signal. The layout of the interface circuit directly affects the speed and reliability of data transmission. The backplane of the existing display and control terminal is relatively large in size and high in cost. In addition, the connection between the backplane and the interface circuit is complicated, which makes it difficult to install and repair the display and control terminal equipment. Summary of the invention

[0003] The technical problem to be solved by the present disclosure is to overcome the defects of the prior art, such as large backplane volume, high cost, and high difficulty in installing and repairing display and control terminal equipment, and to provide an integrated display and control terminal.

[0004] The present invention solves the above technical problems through the following technical solutions:

[0005] The present disclosure provides an integrated display and control terminal, the integrated display and control terminal comprising: a back panel, a front panel and a rear panel;

[0006] The backplane is provided with a first number of core card slots and a second number of IO card slots;

[0007] The core card slot is used to insert a processor based on a field programmable gate array; the IO card slot is used to insert an IO function card;

[0008] The back panel is electrically connected to the front panel and the rear panel respectively; the rear panel is connected to an external device;

[0009] The front panel is used to receive program instructions and send the program instructions to the processor based on the field programmable gate array; the rear panel is used to send data signals of external devices to the IO function card; the backplane is used to receive the program instructions and send the program instructions to the external device; and is also used to receive data signals of the external device and send the data signals of the external device to the processor based on the field programmable gate array.

[0010] Preferably, the front panel includes a display touch screen, a universal serial bus interface socket, a network interface socket, a digital video interface socket and a membrane keypad;

[0011] The display touch screen and the membrane keypad are connected to the back panel via cables respectively;

[0012] The back panel is provided with a first opening, a second opening and a third opening corresponding to the front panel; wherein the first opening corresponds to the universal serial bus interface socket, the second opening corresponds to the network interface socket, and the third opening corresponds to the digital video interface socket.

[0013] Preferably, the rear panel includes a power terminal block, a serial communication interface, a network interface and an external device interface;

[0014] The power terminal block, the serial communication interface and the network interface are connected to the field programmable gate array-based processor; the external device interface is connected to the IO function card;

[0015] The power terminal block is used to supply power to a field programmable gate array-based processor and an IO function card inserted into the backplane;

[0016] The external device interface is used to receive input and output data signals of an external device.

[0017] Preferably, the core card slot is provided with a positioning pin.

[0018] Preferably, the core card slot and the IO card slot both use 2 mm HM connectors.

[0019] Preferably, the HM connector includes a ground pin and a signal pin; the ground pin and the signal pin are arranged in a staggered manner according to the pin positions of the high-speed signal and the low-speed signal to form a plum blossom shape.

[0020] Preferably, the HM connector includes an 8-pin-row HM connector and a 5-pin-row HM connector.

[0021] Preferably, the digital video interface socket is a 19-pin micro aviation socket.

[0022] Preferably, the IO card slot is used to provide greater than or equal to 40 signal points.

[0023] Preferably, the core card slot is used to provide greater than or equal to 200 signal points.

[0024] On the basis of being in accordance with the common sense in the art, the above-mentioned preferred conditions can be arbitrarily combined to obtain the preferred embodiments of the present disclosure.

[0025] The positive and progressive effects of this disclosure are:

[0026] The present invention is connected to the front panel and the rear panel through connector structures such as the backplane card slot, thereby realizing an integrated display and control terminal design with a compact structure, high integration, and easy maintenance, so that the display and control terminal can reduce the size and cost of the display and control terminal while having relatively reliable transmission performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A structural diagram of an integrated display and control terminal provided in Embodiment 1 of the present disclosure;

[0028] Figure 2 A block diagram of a specific example of an integrated display and control terminal provided in Embodiment 1 of the present disclosure;

[0029] Figure 3 A schematic diagram of the functional interface layout of a back panel of a specific example of an integrated display and control terminal provided in Embodiment 1 of the present disclosure;

[0030] Figure 4 A schematic diagram of a connector of a specific example of an integrated display and control terminal provided in Embodiment 1 of the present disclosure;

[0031] Figure 5 A schematic diagram of a front panel function interface of a specific example of an integrated display and control terminal provided in Embodiment 1 of the present disclosure;

[0032] Figure 6 A core card internal power supply architecture of a specific example of an integrated display and control terminal provided in Embodiment 1 of the present disclosure;

[0033] Figure 7 A schematic diagram of a front panel digital video interface of a specific example of an integrated display and control terminal provided in Embodiment 1 of the present disclosure. DETAILED DESCRIPTION

[0034] The present disclosure is further described below by way of examples, but the present disclosure is not limited to the scope of the examples.

[0035] Prefixes such as "first" and "second" are used in the embodiments of the present disclosure only to distinguish different description objects, and have no limiting effect on the position, order, priority, quantity or content of the described objects. The use of prefixes such as ordinal numbers to distinguish description objects in the embodiments of the present disclosure does not constitute a limitation on the described objects. For the statement of the described objects, please refer to the description in the context of the claims or embodiments, and no unnecessary limitation should be constituted due to the use of such prefixes. In addition, in the description of the present embodiment, unless otherwise specified, the meaning of "plurality" is two or more.

[0036] Example 1

[0037] This embodiment provides an integrated display and control terminal, involving, but not limited to, PCB (Printed Circuit Board, which realizes the interconnection and physical support between various components such as integrated circuit chips. Chips, resistors, capacitors, connectors and other components are fixed on the PCB board by soldering and crimping to form a fully functional circuit board), connectors (connectors realize the transmission of electrical signals between boards or equipment units. Connectors are the "nerve hub and contact point" of the electrical signal transmission system. The logical architecture of the hardware circuit, data transmission rate and throughput, chassis structure and power consumption, equipment use environment and other factors determine the selection requirements of the connector, and the structure and signal transmission performance of the connector itself also play a very critical role in constraining the structure and performance of the entire system), backplane and other design technologies, and also involve high-speed signal integrity, power integrity, EMC (Electromagnetic Compatibility, which refers to the ability of equipment and systems to meet requirements in their electromagnetic environment and not cause unbearable electromagnetic interference to any equipment in their environment) and other hardware technologies. See Figure 1 The integrated display and control terminal includes: a back panel 1, a front panel 2 and a rear panel 3.

[0038] The backplane 1 is provided with a first number of core card slots 11 and a second number of IO card slots 12 (input and output card slots).

[0039] The core card slot 11 is used to insert a processor based on a field programmable gate array (FPGA). The IO card slot 12 is used to insert an IO function card. The first quantity and the second quantity are set according to actual conditions.

[0040] In an optional implementation, both the core card slot and the IO card slot use a 2 mm HM connector (HardMetric Connector, a connector with a hardness of 2 mm pitch).

[0041] In an optional embodiment, the HM connector includes a ground pin and a signal pin, and the ground pin and the signal pin are arranged in a staggered manner according to the pin positions of the high-speed signal and the low-speed signal to form a plum blossom shape.

[0042] In an optional embodiment, the HM connector includes an 8-pin-row HM connector and a 5-pin-row HM connector.

[0043] In an optional implementation, the IO card slot is used to provide greater than or equal to 40 signal points.

[0044] In an optional implementation, the core card slot is used to provide greater than or equal to 200 signal points.

[0045] The back panel is electrically connected to the front panel and the rear panel respectively. The rear panel is connected to external devices.

[0046] The front panel is used to receive program instructions and send the program instructions to the processor based on the field programmable gate array. The rear panel is used to send the data signal of the external device to the IO function card. The backplane is used to receive program instructions and send the program instructions to the external device. It is also used to receive the data signal of the external device and send the data signal of the external device to the processor based on the field programmable gate array.

[0047] In this embodiment, the front panel and the rear panel are connected through connector structures such as the backplane card slot, thereby realizing an integrated display and control terminal design with a compact structure, high integration, and easy maintenance. This enables the display and control terminal to reduce its size and reduce its cost while ensuring relatively reliable transmission performance.

[0048] In an optional implementation, the front panel includes a display touch screen, a universal serial bus interface socket, a network interface socket, a digital video interface socket, and a membrane keypad.

[0049] In an optional implementation, the digital video interface socket uses a 19-pin micro aviation socket.

[0050] The display touch screen and the membrane keypad are connected to the back panel via cables respectively.

[0051] The back panel is provided with a first opening, a second opening and a third opening corresponding to the front panel, wherein the first opening corresponds to the universal serial bus interface socket, the second opening corresponds to the network interface socket, and the third opening corresponds to the digital video interface socket.

[0052] In this embodiment, the opening provided on the back panel makes it possible for the socket body to be directly embedded and installed in the opening without the need for an adapter plate, so that the back panel is connected to the front panel socket. The design is simple and exquisite, further reducing the size of the display and control terminal, thereby achieving the purpose of user convenience and aesthetics.

[0053] In an optional embodiment, the rear panel includes a power terminal block, a serial communication interface, a network interface, and an external device interface.

[0054] The power supply terminal block, the serial communication interface and the network interface are connected to the processor based on the field programmable gate array. The external device interface is connected to the IO function card.

[0055] The power terminal block is used to supply power to the field programmable gate array based processor and IO function cards plugged into the backplane.

[0056] The external device interface is used to receive input and output data signals from external devices.

[0057] In this embodiment, the rear panel provides the processor with input and output data signals of the external device, thereby providing reliable data signals to make the display and control terminal circuit stable and reliable.

[0058] In an optional embodiment, the core card slot is provided with a positioning pin to prevent the processor and IO function card based on the field programmable gate array from being inserted reversely on the backplane, that is, an error-proofing function is provided.

[0059] A specific example is introduced below to explain in detail the integrated display and control terminal device of this embodiment.

[0060] like Figure 2 As shown, the integrated display and control terminal device of this example includes a core card and IO function cards such as analog input and output cards and digital input and output cards (i.e. Figure 2 The core card is based on FPGA design (the core card is a processor based on field programmable gate array). The core card supports a 5-inch LCD touch screen, and supports two USB interfaces (universal serial bus interface), one DVI display interface (digital video interface), and two Gigabit Ethernet interfaces (i.e. Figure 2 The core card has two network ports (shown), two redundant switch EN enable control interfaces, one RS485 interface (external device interface), five panel buttons and indicator light interfaces. In addition, the core card implements the input and output control function of each IO function card data. The core card and IO function cards are installed on the chassis backplane and inserted or pulled out from the backplane through the chassis rails and the puller.

[0061] The front panel of the chassis is equipped with a 5-inch LCD touch screen, two USB sockets, one network port socket, one DVI interface non-standard socket, and one membrane keypad. The front panel interface is mainly used for human-computer interaction, software debugging, data update or download copy, etc. The input and output IO signals connected to external devices, DC 24V (volt) power supply, RS485 interface, 2-way Gigabit Ethernet, etc. are located on the rear panel of the chassis.

[0062] Figure 3 This is a schematic diagram of the functional interface layout of the back panel of the integrated display and control terminal in this example.

[0063] It can be seen that there are 1 core card slot (including J1 and J2 sockets) and 5 IO card slots (including J3-J7 sockets) on the backplane, with a total of 6 columns and 2 rows of sockets. Each IO card slot provides 40 signal points, and the signal points and power ground of each slot are arranged in the same way. All IO signal points are directly connected to the core card FPGA. The programmable FPGA can flexibly configure different card types for each IO slot according to application requirements. Each IO function card can be configured with EEPROM (Electrically Erasable Programmable Read-Only Memory, a non-volatile storage chip). The FPGA can determine the type of IO function card in each slot by reading the EEPROM, and then determine which IO definition and function to use for each IO slot. The IO function card and the FPGA core card use a single-ended routing method with 50 ohm impedance control, which can support SPI bus (Serial Peripheral Interface, a high-speed, full-duplex, synchronous communication bus), I2C bus (Inter-Integrated Circuit, a multi-host, two-wire, low-speed serial communication protocol) and ordinary IO signal bidirectional transmission: the ADC / DAC chip (i.e. analog-to-digital converter chip / digital-to-analog converter chip) on the IO card can communicate with the FPGA through the SPI bus; the configuration memory such as EEPROM on the IO card can communicate with the FPGA through I2C; the switch input and output signals can be directly mounted on the FPGA's IO signal pins after level conversion and isolation circuits. The 40 signal points of each IO slot are sufficient to support various types of IO function cards, such as 24-channel solid-state relay output cards, 8-channel temperature input cards, 4 groups of 8-channel analog current input cards and other IO function cards.

[0064] The back panel also provides an LCD display and touch screen interface, two USB2.0 interfaces, a Gigabit Ethernet interface, a DVI display interface, a membrane button and indicator light board interface for connecting to the front panel.

[0065] In addition, if Figure 4 The core card slot and five IO card slots on the backplane shown above all use high-reliability 2mm HM connectors: The core card slot uses two 200-signal-point HM connectors, one of which has a locating pin in the middle of the cavity shell (corresponding to Figure 4 The Y and Z columns are missing in rows 12 and 13 of the left figure), and the other one does not have a locating pin (corresponding to Figure 4(right side of the figure) to support the core card's anti-misinsertion function; each IO function card uses an HM connector with 125 signal points. Each column of HM connector pins has 25 signal points, and the core card HM connector has 8 columns of pins, supporting a total of 200 signal points. The IO card HM connector has 5 columns of pins, supporting a total of 125 signal points. For HM connectors with more signal points and direct plug-in type, it is supported to use crimping during manufacturing and processing to improve production efficiency.

[0066] HM connectors comply with IEC61076-4-101 standards (a standard established by the International Electrotechnical Commission (IEC)) in terms of electrical characteristics such as voltage protection, current carrying capacity, contact resistance, insulation resistance, and mechanical characteristics such as vibration, impact, and insertion and extraction force, and can perfectly meet the application environment of industrial computers. Functional boards use plugs with metal shielding surfaces on the outside of the plugs, and backplanes use sockets with metal shielding surfaces on the left and right sides of the sockets ( Figure 4 The pins of the metal shielding surface are all connected to the signal ground, which can well achieve signal shielding and ensure that the EMC design meets the requirements. It should be noted that the HM connector is not the only connector type in this embodiment, and this embodiment can also be applied to other connector products.

[0067] Figure 5 This is a schematic diagram of the front panel functional interface of this example. For the connection between the backplane and the front panel, the second row of the five IO card slots on the backplane provides all the signal connector sockets connected to the front panel, including: a 4-channel LVDS (Low Voltage Differential Signaling, a low voltage differential signal) LCD display interface IDC (Internet Data Center) socket and a 4-wire resistive touch screen interface FPC (Flexible Printed Circuit) socket, 2 standard Type A USB2.0 sockets (a standard form of USB interface), 1 standard Gigabit Ethernet RJ45 socket (a network interface), 1 non-standard miniaturized aviation socket (can be converted to a standard DVI plug through an external cable to connect to a DVI monitor), and 1 button and indicator interface socket (to support the connection of the membrane keypad on the front panel). The display touch screen and membrane keypad are connected to the backplane connector through cables, and these connectors are not visible outside the chassis. Two USB sockets, an Ethernet RJ45 socket, and a DVI aviation socket are opened at the corresponding positions of the metal panel on the front panel. These three types of sockets are selected to ensure highly consistent matching, so there is no need to use an adapter plate and the socket body can be directly embedded and installed in the opening. The design is simple and exquisite, and ultimately achieves the purpose of beautiful appearance and easy use.

[0068] The HM connector socket is set to a length of 48 mm, the width of 8 rows of pins is about 21.4 mm, and the width of 5 rows of pins is about 15.4 mm, which supports more signal points in a smaller space. The core card has more signal points, and one column occupies two HM connector sockets. Each column of the IO function card occupies one HM connector socket. The core card and IO function card are installed on the front of the backplane. Therefore, the back area below the IO function card connector of the backplane can be used as the layout space for the signal connector to the front panel. This design ensures that all the space of the backplane is maximized. The final design backplane area is only 138 mm * 133 mm, which achieves a compact and simple structure, thereby reducing the overall structure of the chassis of the display and control terminal. As a key component for connecting internal cards, the small-size backplane design greatly reduces the hardware manufacturing cost.

[0069] Regarding the connection layout between the rear panel and the backplane, for the core card, the rear panel directly provides two 24V DC power supply terminal blocks, two redundant switch enable control terminal blocks, one RS485 micro-aviation socket, and two Gigabit Ethernet non-standard micro-aviation sockets. For IO function cards, the rear panel directly provides green terminal signal access points for various IO signals.

[0070] The USB and Ethernet interfaces on the front panel are mainly designed for debugging, data updating or downloading and copying. For ease of use, standard interfaces are used. All interfaces on the rear panel are main function application interfaces. Therefore, micro aviation sockets and green terminals are used as the interface form. While achieving a small size, the reliability of external cable connection and signal transmission is guaranteed.

[0071] Figure 6 This is the power supply structure inside the core card. The integrated display and control terminal in this example accepts an external 24V (volt) DC power supply, which is converted to 12V voltage by the DC-DC (direct current-direct current) power conversion circuit inside the core card. The 12V voltage is then converted to 5V and various voltages required by other core card circuits. The 5V power supply voltage is input to the IO function card through the backplane. On each IO function card, a DC-DC isolated power supply is designed to generate a 3.3V power supply for the functional circuits on the IO function card.

[0072] In addition, in order to ensure that sufficient power supply current is provided for IO function cards, the 5V power supply system design mainly adopts the following measures: the 12V to 5V DC-DC power conversion circuit is designed with sufficient margin, and the maximum current output capacity is greater than 10A (ampere) to ensure stable power supply when the display and control terminal is started and the data throughput is relatively large; dedicated 5V power planes are designed on the PCBs of the core card, backplane and IO function cards, and enough through holes are designed at the layer change of the power plane; on the backplane connector, multiple signal points are allocated as 5V power supply paths; near the signal points of the backplane 5V slot, multiple 22uF (microfarad) capacitors are placed to ensure power supply stability.

[0073] In addition to the two USB ports and one RJ45 network port on the front panel, the integrated display and control terminal provided in this example also uses non-standard interfaces, such as the 2 mm HM connector on the back panel, the DVI connector on the front panel, and the RS485 and Ethernet interfaces on the rear panel. All interfaces are customized. Therefore, when allocating power and signal pins, not only the current capacity but also SI (Signal Integrity) and EMC issues should be considered.

[0074] From the perspective of signal integrity, the connector model is the model of the transmission line, but the signal transmission does not refer to the ground plane, but forms a return path through the ground pin. There must be many signal lines sharing a ground loop, and the connector position may cause crosstalk problems. Therefore, when arranging the connector pin signals, pay attention to the reasonable allocation of signal, power, and ground pin positions and quantities. The principle is to optimize the PCB routing path (fewer vias), reduce crosstalk, reduce radiation, and ensure the return path. Each signal pin accessory needs to have its own ground loop, and the key signal is separated from other signals by the ground pin.

[0075] When defining the backplane connector signal, the ground pins and signal pins are arranged in a plum blossom shape, and the pin positions of the high-speed signal and ground are staggered to reduce signal crosstalk.

[0076] like Figure 7As shown in the figure, the DVI interface routing includes 5 pairs of differential display signals and a set of RS232 (a serial communication interface standard) single-ended signals. The DVI differential display signal can support the connection of an external DVI display, and the RS232 signal supports the connection of an external display with a touch screen function. Since the standard DVI socket is too large, the integrated display and control terminal structure has no extra space to support installation, so a 19-pin micro aviation socket is selected, and the volume is further reduced. When designing the signal point definition, the outer ring signal points are preferred to route the differential signals first, and each differential pair must be directly separated by a ground signal point. For RS232 signals that do not require high signal integrity, they are routed to the inner ring. In addition to the signal points, all empty pins are defined as ground signals to ensure sufficient return paths and improve anti-interference capabilities.

[0077] Although the specific embodiments of the present disclosure are described above, those skilled in the art should understand that this is only an example, and the protection scope of the present disclosure is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present disclosure, but these changes and modifications all fall within the protection scope of the present disclosure.

Claims

1. An integrated display and control terminal, characterized in that: The integrated display and control terminal comprises: a back panel, a front panel and a rear panel; The backplane is provided with a first number of core card slots and a second number of IO card slots; The core card slot is used to insert a processor based on a field programmable gate array; the IO card slot is used to insert an IO function card; The back panel is electrically connected to the front panel and the rear panel respectively; the rear panel is connected to an external device; The front panel is used to receive program instructions and send the program instructions to the processor based on the field programmable gate array; the rear panel is used to send data signals of external devices to the IO function card; the backplane is used to receive the program instructions and send the program instructions to the external device; and is also used to receive data signals of the external device and send the data signals of the external device to the processor based on the field programmable gate array.

2. The integrated display and control terminal according to claim 1, characterized in that: The front panel includes a display touch screen, a universal serial bus interface socket, a network interface socket, a digital video interface socket and a membrane keypad; The display touch screen and the membrane keypad are respectively connected to the back panel via cables; The back panel is provided with a first opening, a second opening and a third opening corresponding to the front panel; wherein the first opening corresponds to the universal serial bus interface socket, the second opening corresponds to the network interface socket, and the third opening corresponds to the digital video interface socket.

3. The integrated display and control terminal according to claim 1, characterized in that: The rear panel includes a power terminal block, a serial communication interface, a network interface and an external device interface; The power terminal block, the serial communication interface and the network interface are connected to the processor based on the field programmable gate array; the external device interface is connected to the IO function card; The power terminal block is used to supply power to a field programmable gate array-based processor and an IO function card inserted into the backplane; The external device interface is used to receive input and output data signals of an external device.

4. The integrated display and control terminal according to claim 1, characterized in that: The core card slot is provided with a positioning pin.

5. The integrated display and control terminal according to claim 1, characterized in that: The core card slot and the IO card slot both use 2 mm HM connectors.

6. The integrated display and control terminal according to claim 5, characterized in that: The HM connector includes a ground pin and a signal pin; the ground pin and the signal pin are arranged in a staggered manner according to the pin positions of the high-speed signal and the low-speed signal to form a plum blossom shape.

7. The integrated display and control terminal according to claim 5, characterized in that: The HM connector includes an 8-pin-row HM connector and a 5-pin-row HM connector.

8. The integrated display and control terminal according to claim 2, characterized in that: The digital video interface socket uses a 19-pin micro aviation socket.

9. The integrated display and control terminal according to claim 1, characterized in that: The IO card slot is used to provide greater than or equal to 40 signal points.

10. The integrated display and control terminal according to claim 1, characterized in that: The core card slot is used to provide greater than or equal to 200 signal points.

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