CN111142615B

CN111142615B - Anti-electromagnetic domestic reinforced computer based on Loongson 3A

Info

Publication number: CN111142615B
Application number: CN201911214778.1A
Authority: CN
Inventors: 陈玉菡; 刘奔; 唐文武; 李兆博; 苏红; 杨志
Original assignee: Beijing Institute of Specialized Machinery
Current assignee: Beijing Institute of Specialized Machinery
Priority date: 2019-12-02
Filing date: 2019-12-02
Publication date: 2022-01-18
Anticipated expiration: 2039-12-02
Also published as: CN111142615A

Abstract

The invention relates to an anti-electromagnetic home-made ruggedized computer based on Loongson 3A, and belongs to the field of military home-made autonomous controllable vehicle control equipment. The ruggedized computer comprises a Loongson 3A main control module, a power supply module, an SOC auxiliary module, a functional module, a filtering interface module and a case; the Loongson 3A main control module can run a domestic operating system and provide various interfaces; the power supply module realizes power supply conversion and supplies power to the Loongson 3A main control module, the SOC auxiliary module, the functional module and the filtering interface module; the functional module realizes the interface expansion of the Loongson 3A main control module; the SOC auxiliary module assists the Loongson 3A main control module to realize the processing of high-speed digital signals and video signals; the filtering interface module comprises a signal filtering module consisting of a filtering circuit and an external interface module consisting of an electric connector, and is used for finishing filtering processing of different input signals according to the characteristics of the input signals and realizing the input signal filtering and signal output of the reinforcing machine.

Description

Anti-electromagnetic domestic reinforced computer based on Loongson 3A

Technical Field

The invention belongs to the field of military domestic autonomous controllable vehicle control equipment, and particularly relates to an anti-electromagnetic domestic ruggedized computer based on a Loongson 3A.

Background

With the common application of electromagnetic weapons, the anti-electromagnetic interference capability of military electronic equipment is generally improved, the conventional military reinforcing machine in China has more external interfaces, and the electromagnetic interference entering the interior of the military reinforcing machine through a cable is protected weakly.

The image acquisition and processing system plays an important role in unmanned driving and vehicle-mounted intelligent control technology. With the rapid development of the information technology, the intelligent degree and the integration degree of the control equipment are higher and higher, and the requirements on the performance, the function, the volume, the power consumption, the weight, the reliability and the space environment applicability of the image acquisition and processing system are higher and higher.

The autonomous controllability of weaponry is an urgent requirement for army information construction, and with the outbreak of trade and war in China and America, the Chinese and Hua are the occurrences of sanctioned events in succession, the importance of the autonomous controllability of core technologies, particularly the autonomous controllability of weaponry, is deeply recognized. The research and development and application of autonomous CPUs represented by godson and Feiteng are greatly advanced, the design technical level of a domestic processor is gradually improved, a domestic operating system is gradually improved, an autonomous controllable information industry system is formed, and the autonomous controllable control system is widely applied to the military field of China step by step and gradually realizes the localization change of military control equipment of China.

Military domestic control equipment in China has strong requirements on electromagnetic protection, image processing and autonomous controllability.

Disclosure of Invention

Technical problem to be solved

The invention aims to solve the technical problem of designing an anti-electromagnetic domestic reinforced computer based on a Loongson 3A aiming at the requirements of electromagnetic protection, image processing and autonomous controllability in the technical background.

(II) technical scheme

In order to solve the technical problem, the invention provides an anti-electromagnetic domestic ruggedized computer based on a Loongson 3A, which comprises a Loongson 3A main control module, a power supply module, an SOC auxiliary module, a functional module, a filtering interface module and a case; the Loongson 3A main control module can run a domestic operation system and provide various interfaces; the power supply module realizes power supply conversion and supplies power to the Loongson 3A main control module, the SOC auxiliary module, the functional module and the filtering interface module; the functional module realizes the interface expansion of the Loongson 3A main control module; the SOC auxiliary module assists the Loongson 3A main control module to realize the processing of high-speed digital signals and video signals; the filtering interface module comprises a signal filtering module consisting of a filtering circuit and an external interface module consisting of an electric connector, and is used for finishing filtering processing of different input signals according to the characteristics of the input signals and realizing the input signal filtering and signal output of the reinforcing machine.

Further, the operating system run by the Loongson 3A main control module is the operating system of the Kangsu kylin.

Furthermore, the kernel is designed and tailored on the basis of the operating system of the winning bid kylin.

Further, the interface that loongson 3A master control module provided includes 2 way display interface, 2 way ethernet interfaces, 2 way CAN bus interface, 3 way serial ports, 4 way USB interfaces, PICE and SPI bus interface.

Further, the power supply module supplies power to the Loongson 3A main control module, the SOC auxiliary module, the functional module and the filtering interface module, wherein the power is DC5V, DC3.3V and DC 12V.

Furthermore, the functional module expands the PICE bus into a 2-path Ethernet interface, a 2-path CAN bus interface, an 8-path analog input interface and a digital output interface.

Furthermore, the SOC auxiliary module takes an SoC chip as a core, and expands the peripheral interface of the chip to realize the functions of a two-way gigabit Ethernet, a four-way USB interface and a two-way DVI interface.

Further, the filtering interface module, according to the characteristics of the input signal, performs filtering processing on different input signals specifically: an optical coupler filtering method is adopted for IO signals, input signals enter an optical coupler after passing through a filtering circuit, the input signals are converted into 3.3V signals required by a mainboard through the optical coupler, output signals are converted into 24V output signals required by a system through the optical coupler, and interference of external signals to the interior of equipment can be avoided through optical coupler isolation; the video signal is sensitive to electromagnetic interference, and the signal is filtered by using a PI type low-pass filter circuit, so that interference and noise caused by an external cable can be effectively inhibited through filtering; kilomega Ethernet signals, and isolating and filtering the network signals by adopting a special network transformer; the filter circuit of the CAN bus comprises a filter inductor, a filter capacitor and a diode, wherein the filter inductor CAN filter out common mode interference on a differential line, the filter capacitor provides a low-resistance loop for interference, and the diode is used for electrostatic protection; the power supply signal is filtered by a power supply special filter.

Furthermore, the electric connector is a circular connector for a printed board and is directly welded on the filtering interface module board card.

Furthermore, each module of the ruggedized computer adopts a standard 6UVPX board card, and the modules are interconnected through a signal network by a bottom plate, so that the subsequent board card upgrading can be supported.

(III) advantageous effects

Compared with the existing reinforcing machine, the device has the advantages of localization, modularization, standardization, universalization, electromagnetic resistance, strong image processing capability and the like. The invention filters the input signal through the filtering interface module, completes the filtering processing of different input signals according to the characteristics of the input signal, and has strong electromagnetic interference protection capability. In addition, the invention adopts the universal and modularized hardware circuit design, the system has strong expandability, the configuration of a new hardware scheme can be completed by increasing and deleting the number of modules, the hardware control circuit does not need to be redesigned, and the development progress of new models of products is improved. All modules of the reinforcing machine are standard 6UVPX board cards, signal network interconnection is achieved among the modules through a bottom plate, and the reinforcing machine is strong in function expandability and high in flexibility. In addition, the reinforcing machine adopts a Loongson 3A processor and a Chinese standard kylin operating system, and has the advantages of localization and autonomous control. Finally, the reinforcing machine adopts an SOC auxiliary module to assist the Loongson 3A main control module to realize the processing of high-speed digital signals and video signals, and has strong image processing capacity.

Drawings

FIG. 1 is a schematic diagram of the architecture of an anti-electromagnetic domestic ruggedized computer based on Loongson 3A of the present invention;

fig. 2 is a software framework schematic diagram of the anti-electromagnetic domestic ruggedized computer based on the Loongson 3A of the present invention.

Detailed Description

In order to make the objects, contents, and advantages of the present invention clearer, the following detailed description of embodiments of the present invention will be made in conjunction with the accompanying drawings and examples.

The reinforcing machine is based on a Loongson 3A microprocessor and mainly comprises a Loongson 3A main control module, a power supply module, an SOC auxiliary module, a functional module and a filtering interface module. Each module is realized by a board card, and the board card adopts a 6U standard board card, so that subsequent board card upgrading can be supported. The power supply module realizes power supply conversion and supplies power to the Loongson 3A main control module, the SOC auxiliary module, the functional module and the filtering interface module, such as DC5V, DC3.3V and DC 12V; the Loongson 3A main control module provides 2 paths of display interfaces, 2 paths of Ethernet interfaces, 2 paths of CAN bus interfaces, 3 paths of serial ports, 4 paths of USB interfaces, a PICE (peripheral interface Unit) and an SPI (Serial peripheral interface); the function module realizes interface expansion, and expands the PIC-E bus into 2 paths of Ethernet interfaces, 2 paths of CAN bus interfaces, 8 paths of analog input and output interfaces and digital input and output interfaces; the filtering interface module is used for realizing input signal filtering and signal output of the reinforcing machine; the SOC auxiliary module mainly assists the Loongson 3A main control module to realize the processing of high-speed digital signals and video signals. And signal transmission among the board cards is realized through the bottom plate.

As shown in fig. 1, the present invention is composed of a loongson 3A main control module, a power supply module, an SOC auxiliary module, a function module, a filter interface module and a chassis. The Loongson 3A main control module CAN run a domestic operating system and provides interfaces such as PCIE, SPI, VGA, DVI, USB, CAN bus, serial port, digital quantity input/output, network port and the like; the main function of the function module is to expand the bus interface of the Loongson 3A main control module and provide digital input/output, CAN bus and analog input/output interface; the power supply module provides direct current power supply with various qualities for the Loongson 3A main control module, the SOC auxiliary module, the functional module and the filtering interface module; the filtering interface module is used for realizing filtering processing of external input and output interface signals of the reinforcing machine and installing the connector; the bottom board is a signal interconnection board designed based on a VPX architecture, and can realize signal switching among other modules.

As shown in fig. 1, the loongson 3A processor is located on the loongson 3A main control module, and provides various controllers and bus interfaces, and the loongson 3A main control module uses 5V power supply. The interface integrated by the Loongson 3A processor is expanded into a video interface, a network interface, a CAN bus, a serial port and a 20-path digital quantity input and output interface.

The functional module is composed of 6 parts: the device comprises a PCIE-PCI bridge chip, an FPGA control circuit, a digital input/output circuit, an analog input/output circuit, a CAN bus transceiver circuit and a serial interface circuit. After being led to the functional module, a PCIE bus of the Loongson 3A main control module is firstly converted into a PCI bus through a PCIE-PCI bridge chip, the width of the bus is 33MHz/32bit, 5V/3.3V signals are compatible, and the PCIE-PCI bridge chip is used for hanging the FPGA control circuit to the PCI bus; the FPGA control circuit is used for detecting data input of a digital quantity input-output circuit and an analog quantity input-output circuit, the digital quantity input-output circuit is used for level conversion of input digital signals and state control of signals output to the FPGA control circuit, and the analog quantity input-output circuit is used for A/D conversion of input analog signals and D/A conversion and state control of output digital signals.

The SOC auxiliary module takes an SoC chip XC7Z030-2FBG676I as a core, and expands a peripheral interface of the chip to realize interface functions of a double-channel gigabit Ethernet, a four-channel USB interface, a double-channel DVI and the like, and the module can assist the Loongson 3A main control module to complete the processing of high-speed signals and images.

The filtering interface module consists of two parts: a signal filtering module consisting of a filtering circuit and an external interface module consisting of an electric connector. The filter circuit completes filtering processing of different input signals according to the characteristics of the input signals, the electric connector is a circular connector special for a printed board of 158 factories, and the electric connector is directly welded on a filter interface module board card, so that the number of cables inside the reinforcing machine is reduced, and the utilization rate of the internal space of the reinforcing machine is greatly improved.

The IO signal is a unidirectional transmission signal, an optical coupler filtering method is adopted, an input signal enters an optical coupler after passing through a wave filtering circuit, a 3.3V signal required by a mainboard is output after optical coupler conversion, an internal signal is converted into a 24V output signal required by a system after the output signal passes through the optical coupler, and the interference of an external signal to the inside of equipment can be avoided after the output signal is isolated by the optical coupler; video signals (VGA/DVI) are sensitive to electromagnetic interference, PI type low-pass filter circuits are used for filtering the signals, and interference and noise caused by external cables can be effectively inhibited after the signals are filtered; kilomega Ethernet signals, and isolating and filtering the network signals by adopting a special network transformer; the CAN bus filter circuit consists of an inductor, a capacitor and a diode, common-mode interference on a differential line CAN be filtered after the common-mode interference is filtered by the common-mode inductor, the filter capacitor provides a low-resistance loop for the interference, and the transient diode is used for electrostatic protection; the power supply signal is filtered by a special filter. Except filtering the signal, this equipment has adopted the special circular connector of printed board, and the connector lug weld is on filtering interface module integrated circuit board, and inside all signals all interconnect through the bottom plate, have avoided the interference of the inside cable of reinforcement machine, have greatly improved the anti-electromagnetic interference ability of equipment.

As shown in fig. 2, the domestic general control device of the present invention adopts a hierarchical design method. The software hierarchy is divided into underlying hardware platform software, interface driver software, operating system kernel and application program interface software.

The bottom hardware platform software is FPGA software directly related to the equipment, the interface driving software is an interface between an operating system and the bottom hardware, the modular design is adopted, the modular design comprises an Ethernet driver, a dual-redundancy Ethernet Bonding module driver, a USB driver, a serial port driver, a display driver, a universal I/O interface and an SPI interface driver, and the programming adopts C language. The operating system adopts a winning kylin operating system. An application program interface is an operating interface provided by an operating system to an application program.

The invention adopts the customized operating system based on the winning-bid kylin operating system, designs and cuts the kernel on the basis of winning-bid kylin, only keeps the module related to the control equipment function, designs the function module driving program, realizes the dynamic loading of the driving program, reduces the occupation of processor resources and reduces the power consumption of the processor.

The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.

Claims

1. The utility model provides an anti-electromagnetism homemade ruggedized computer based on godson 3A which characterized in that: the device comprises a Loongson 3A main control module, a power supply module, an SOC auxiliary module, a functional module, a filtering interface module and a case; the Loongson 3A main control module can run a domestic operating system and provide various interfaces; the power supply module realizes power supply conversion and supplies power to the Loongson 3A main control module, the SOC auxiliary module, the functional module and the filtering interface module; the functional module realizes the interface expansion of the Loongson 3A main control module; the SOC auxiliary module assists the Loongson 3A main control module to realize the processing of high-speed digital signals and video signals; the filtering interface module comprises a signal filtering module consisting of a filtering circuit and an external interface module consisting of an electric connector, filtering processing of different input signals is completed according to the characteristics of the input signals, the input signals of the Loongson 3A main control module, the power supply module, the SOC auxiliary module and the functional module need to be filtered by the filtering interface module, and the filtering interface module also completes signal output, so that the input signal filtering and the signal output of the reinforcing machine are realized.

2. The anti-electromagnetic home-made ruggedized computer based on the Loongson 3A of claim 1, wherein: the operating system operated by the Loongson 3A main control module is the operating system of the winning kylin.

3. The anti-electromagnetic home-made ruggedized computer based on the Loongson 3A of claim 2, wherein: on the basis of the operating system of winning the bid for kylin, the kernel is designed and cut.

4. The anti-electromagnetic home-made ruggedized computer based on the Loongson 3A of claim 1, wherein: the interface that godson 3A host system provided includes 2 way display interface, 2 way ethernet interfaces, 2 way CAN bus interface, 3 way serial ports, 4 way USB interfaces, PICE and SPI bus interface.

5. The anti-electromagnetic home-made ruggedized computer based on the Loongson 3A of claim 1, wherein: the power supply module supplies power to the Loongson 3A main control module, the SOC auxiliary module, the functional module and the filtering interface module through DC5V, DC3.3V and DC 12V.

6. The anti-electromagnetic home-made ruggedized computer based on the Loongson 3A of claim 4, wherein: the function module expands the PICE bus into 2 paths of Ethernet interfaces, 2 paths of CAN bus interfaces, 8 paths of analog quantity input interfaces and digital quantity output interfaces.

7. The anti-electromagnetic home-made ruggedized computer based on the Loongson 3A of claim 1, wherein: the SOC auxiliary module takes an SoC chip as a core and expands a peripheral interface of the chip to realize functions of a two-way gigabit Ethernet, a four-way USB interface and a two-way DVI interface.

8. The anti-electromagnetic home-made ruggedized computer based on the Loongson 3A of claim 7, wherein: the SoC chip is XC7Z030-2FBG676I chip.

9. The anti-electromagnetic home-made ruggedized computer based on the Loongson 3A of claim 1, wherein: the electric connector selects a circular connector for the printed board, and the electric connector is directly welded on the filtering interface module board card.

10. The anti-electromagnetic home-made ruggedized computer based on the Loongson 3A of claim 1, wherein: all modules of the ruggedized computer adopt standard 6UVPX board cards, signal network interconnection is realized among the modules through a bottom plate, and subsequent board card upgrading can be supported.