Remote interface state acquisition and control device based on programmable logic component

Abstract

The invention relates to the technical field of signal acquisition, in particular to a remote interface state acquisition and control device based on a programmable logic component, the device takes a programmable fusion chip PSOC as a core board, and the programmable fusion chip PSOC is divided into a logic processing end and a system processing end; the logic processing end is used for completing analog quantity acquisition, analog quantity output, discrete magnitude acquisition, discrete magnitude output and protocol conversion among different types of interfaces; the system processing end communicates with the logic processing end through an AXI bus, and the system processing end is provided with a software system and used for controlling a remote interface and processing data. The system has the advantages of high reliability, high performance, low power consumption and programmable function, and realizes the integrated integration of information processing and control feedback.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of signal acquisition, in particular to a remote interface state acquisition and control device based on programmable logic components. BACKGROUND

[0002] With the continuous progress of avionics technology, airborne electromechanical equipment has also undergone significant changes, especially with the transformation of the aircraft architecture from the traditional joint architecture to the distributed architecture, the remote interface unit has gradually become an important device of the electromechanical system. The remote interface unit (RIU) is an important part of the helicopter electromechanical integrated management system, used for acquiring and controlling the distributed end devices of the helicopter electromechanical system, and is the "nerve ending" of the electromechanical system. As a signal acquisition and execution unit of the electromechanical system, the remote interface unit is distributed at various locations on the aircraft, acquires sensor signals in its vicinity, and transmits data to the upper controller through the bus. At the same time, it receives instructions from the upper controller and is responsible for the corresponding output. This architecture of near-end acquisition and far-end transmission makes full use of the in-flight space, reduces the complexity of cable routing, improves its reliability, and makes maintenance easier. It is an indispensable part of the current and future electromechanical integrated management system. In the design of new helicopters, various hydraulic, pneumatic, mechanical, and electrical devices are constantly enriched, and their state information acquisition, function control, and energy control are becoming increasingly complex, so the number of remote interface unit interfaces is becoming increasingly complex, and therefore higher requirements are placed on the technical architecture of the remote interface unit.

[0003] The traditional remote interface processing unit mainly uses MCU to achieve software development, but it has deficiencies in real-time performance, high precision, and physical interface multiplexing, especially in large aircraft electromechanical information acquisition, which has high demands on the real-time performance and high precision consistency of the overall system, and there are many physical quantity data. A single MCU cannot meet the interface quantity requirements, and the design of multiple MCUs increases the complexity of the system, which has a great impact on clock synchronization and real-time performance.

[0004] Therefore, it is very important to design a high-reliability, high-performance, low-power, programmable remote interface state acquisition and control device architecture. SUMMARY

[0005] Therefore, the present application provides a remote interface state acquisition and control device based on programmable logic components, which has high reliability, high performance, low power consumption, and programmable function, and realizes integrated integration of information processing and control feedback.

[0006] In order to achieve the above purpose, the present application adopts the following technical solutions:

[0007] A remote interface status acquisition and control device based on programmable logic components, which uses a programmable fusion chip (PSOC) as its core board. The programmable fusion chip (PSOC) is divided into a logic processing end and a system processing end.

[0008] The logic processing end is used to complete analog quantity acquisition, analog quantity output, discrete quantity acquisition, discrete quantity output and protocol conversion between different types of interfaces;

[0009] The system processing end communicates with the logic processing end via an AXI bus. The system processing end is equipped with a software system for realizing control of a remote interface and processing of data.

[0010] Furthermore, it also includes a dual power supply system, which includes an input isolation circuit. The input isolation circuit is configured with two independent MOS switch tubes and O-ring controllers for realizing switching between normal power supply and emergency power supply.

[0011] Furthermore, the dual power supply system also includes an input filter circuit, an overvoltage / undervoltage surge power-off delay anti-backflow circuit, a DC / DC converter and an output filter circuit connected sequentially after the input isolation circuit.

[0012] Furthermore, the logic processing end is equipped with an analog quantity acquisition control architecture and a discrete quantity acquisition control architecture;

[0013] The analog quantity acquisition control architecture is connected to a 1394B card, an SM3490 chip, an AD581 chip, a Schmitt trigger and an AD converter; wherein the 1394B card is connected to the 1394 bus, the SM3490 chip is connected to an 8-way RS422 interface, the AD581 chip is connected to a 1-way DC power output interface, the Schmitt trigger is connected to a 3-way square wave frequency signal input interface, and the AD converter is connected to multiple four-wire resistance acquisition interfaces and multiple differential input interfaces;

[0014] The discrete quantity acquisition control architecture includes multiple discrete quantity signal acquisition channels, and each discrete quantity signal acquisition channel includes a digital isolator and a discrete quantity acquisition chip.

[0015] Furthermore, the AD converter includes a first AD converter, a second AD converter and a third AD converter;

[0016] Among them, the first AD converter is connected to 6 four-wire resistance acquisition interfaces in the range of 0-300Ω; the second AD converter is connected to 3 four-wire resistance acquisition interfaces in the range of 0-4200Ω and 2 differential input interfaces in the range of 0-100mV; the third AD converter is connected to 8 differential input interfaces in the range of 0-10V through a voltage collector;

[0017] In terms of resistance acquisition, a four-wire resistance acquisition solution is used to convert the resistance value to be measured input from the remote interface into the corresponding voltage value for measurement, and then the first AD converter and / or the second AD converter are used to perform analog-to-digital conversion, and the result is transmitted to the programmable fusion chip PSOC through the serial data interface;

[0018] In terms of voltage collection, analog gain adjustment and filtering are performed on the voltage input from the differential input interface to the voltage collector, and the processed data is transmitted to the programmable fusion chip PSOC.

[0019] Furthermore, multiple discrete quantity signals are input into different discrete quantity acquisition chips after passing through the filtering circuit. The discrete quantity acquisition chip sends the converted logic level to the corresponding interface of the programmable fusion chip PSOC through the interface after passing through the digital isolator; the internal control logic of the programmable fusion chip PSOC parses the received interface data and stores the parsed data in the dual-port RAM for access by the main controller; the control logic of the programmable fusion chip PSOC obtains the configuration data required to be output by the main controller through the dual-port RAM, and the programmable fusion chip PSOC outputs these configuration data to the corresponding discrete quantity acquisition chip configuration register after passing through the digital isolator.

[0020] Furthermore, the discrete quantity signal types collected by the discrete quantity acquisition control architecture include: ground / open discrete quantity, voltage / ground discrete quantity and voltage / open discrete quantity, wherein the voltage includes +10V, +15V and +28V.

[0021] Furthermore, the logic processing end is configured with FPGA logic based on a lookup table drive mode of programmable logic. The FPGA logic is used to realize the reception and transmission of RS-422A serial port data, AD sampling, discrete SPI interface allocation connection, discrete GPIO interface allocation connection and 1394 card PCIE communication link functions; it is also used to assist in realizing BIT self-test, various command functions, terminal management and auxiliary debugging functions.

[0022] Furthermore, the system processing end includes four ARM processor cores, among which one ARM processor core is used to run the embedded operating system, and the other three ARM processor cores are reserved for scheduling redundancy; when one ARM processor core fails or is abnormal, the remaining ARM processor cores realize real-time monitoring and takeover of the abnormal core status; at the same time, the reserved ARM processor core is also used to support subsequent equipment upgrades and iterations.

[0023] Furthermore, the system processing end is equipped with a software system, which includes a bootloader startup program, a BSP board support package, an embedded real-time operating system, device driver software and functional software; wherein, the functional software has data acquisition function, online upgrade function, protocol parsing and execution function and periodic reporting function; the device driver software has machine position identification function, CAN bus driver function, RS422 interface driver function, 1394B daughter card driver function, discrete interface driver function and analog interface driver function.

[0024] It can be seen from the above technical solutions that compared with the prior art, the present invention has the following beneficial effects:

[0025] 1. This invention utilizes a high-performance PSOC chip as its core, integrating system processing and logic processing to achieve an integrated design for the remote interface unit (RIU). This design utilizes a single PSOC chip to implement both the system software and logic control of the RIU, improving system integration and reducing device weight. The hardware interface, system software, and logic system work together with clear boundaries and appropriate coupling to achieve the overall functionality and performance of the electromechanical management computer. Furthermore, the unified PSOC software system design enhances the stability and reliability of remote interface status acquisition and control.

[0026] 2. The present invention improves the system's capabilities in interface control, information processing, and protocol conversion through the design of a programmable interface processing unit.

[0027] 3. The present invention improves the reliability, stability and energy consumption level of the device through a dual power supply system, that is, by adopting seamless switching of normal and emergency power supplies. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0029] Figure 1 A schematic diagram of the structure of a remote interface status acquisition and control device based on programmable logic components provided by the present invention;

[0030] Figure 2 A schematic structural diagram of the dual-circuit power supply system provided by the present invention;

[0031] Figure 3 A schematic structural diagram of the input isolation circuit provided by the present invention;

[0032] Figure 4 A schematic diagram of the structure of the analog quantity acquisition control architecture provided by the present invention;

[0033] Figure 5 A schematic diagram of the structure of the discrete quantity acquisition control architecture provided by the present invention;

[0034] Figure 6 This is a schematic diagram of the structure of the software system provided by the present invention. DETAILED DESCRIPTION

[0035] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0036] The embodiment of the present invention discloses a remote interface status acquisition and control device based on a programmable logic component. The device uses a programmable fusion chip PSOC as a core board. The programmable fusion chip PSOC is divided into a logic processing end and a system processing end.

[0037] The logic processing end is used to complete analog quantity acquisition, analog quantity output, discrete quantity acquisition, discrete quantity output and protocol conversion between different types of interfaces;

[0038] The system processing end communicates with the logic processing end through the AXI bus. The system processing end is equipped with a software system for controlling the remote interface and processing data.

[0039] Specifically, the present invention uses Fudan Microelectronics' FMQL45T900 programmable fusion chip (PSOC) as its core, effectively improving the shortcomings of traditional MCU solutions in hardware real-time performance, high precision, and physical interface reusability. The collected data is periodically uploaded to the PSOC via the 1394B bus, and the output of each output interface can be controlled based on the PSOC output control instructions received via the 1394B bus. The functions of multiple hardware interfaces connected to the PSOC chip are distinguished by the machine position identification number, and the remote interface position is set using the machine position signal. This signal is filtered and then introduced into the PSOC's GPIO pin. The PSOC runs different configurations based on the specific information input to the machine position identification.

[0040] like Figure 1As shown, the PSOC chip handles high-speed data processing and storage, extending the 1394B interface via the PCIE interface. It can be divided into a PS (system processing) side and a PL (logic processing) side. The PS side is equipped with a 1GB high-speed DDR3 SDRAM chip, and the PL side runs the logic to perform analog acquisition and output, discrete acquisition and output, and protocol conversion for the RS-422A and CAN interfaces. Furthermore, the front panel of the interface unit includes reserved RS232 serial ports, Ethernet ports, and USB ports for system maintenance.

[0041] The bus width of the PS-side DDR3 SDRAM is 32 bits, and the maximum operating speed is 533MHz (data rate can reach 1066Mbps); the bus width of the PL-side DDR3 SDRAM is 64 bits, and the maximum operating speed can reach 800MHz (data rate can reach 1600Mbps).

[0042] The device of the present invention uses a high-performance domestically produced PSOC chip as the core board, and is composed of an independent mainboard + hardware interface to form a remote interface processing unit. The PSOC chip integrates general computing resources and logical programmable resources, and can run system software to realize highly customized interfaces, control systems and other logical functions. The system software runs in the general computing resource domain, mainly using an embedded operating system as a carrier, supplemented by various peripheral drivers and special function software, and mainly realizes discrete quantity, analog quantity interface acquisition control, online upgrade and other functions. The logical function is mainly achieved by carrying out hardware description language design in the programmable logic domain to form a standard interface or customized interface protocol, as well as part of the control logic. The three parts of the hardware interface, system software and logical function system work together with clear boundaries and moderate coupling to jointly complete the overall function and performance of the electromechanical management computer.

[0043] The device of the present invention has high integration, high reliability and low power consumption, which is mainly reflected in:

[0044] First, the remote interface processing unit achieves flexible data interface multiplexing and combination configuration (i.e., the same physical data interface can realize the input of different sensor discrete quantities through programmable logic) through highly integrated input and output discrete quantities, input and output analog quantities, and serial data interfaces, and through the programmable design of the FPGA physical interface, it meets the interface adaptation of various sensors and actuators of the helicopter, and uses a high-speed bus to access the airborne network, and together with the remote interface unit, it forms a distributed electromechanical integrated management system.

[0045] Secondly, the remote interface processing unit integrates both the software control processing under a general-purpose microprocessor and the lookup table (LUT) driving mode based on programmable logic.

[0046] Third, the remote interface processing unit's high-speed serial bus interface can be adapted to a 1394-wire architecture, enabling remote access and meeting the interface control requirements of the helicopter's avionics system platform. Furthermore, the remote interface processing unit uses the motherboard operating system's time cycle as a time reference, providing a unified time base with the system clock for all aircraft's electromechanical sensor status acquisition and actuator output control.

[0047] Fourthly, the use of various highly integrated chips such as discrete interface chips, high-precision multi-channel AD chips, and highly integrated PSOCs has achieved high-density integrated integration of the mainboard functional components. The remote interface processing unit has a high degree of integration and extremely small installation size, realizing the integrated integration of information processing and control feedback, greatly reducing the weight of the entire machine, and facilitating remote distributed data collection and centralized solution and control of the system.

[0048] The motherboard adopts modular design. For example, in the 1394B module design, the "motherboard + daughter card" mode is adopted, that is, a standard daughter card interface is designed on the motherboard, and the 1394 module is designed as a standard daughter card, which is connected to the motherboard. In addition to ensuring normal communication and data acquisition functions, the interchangeability between electromechanical systems is increased.

[0049] In addition, the device of the present invention also adopts BIT circuit design in hardware and software design to ensure the operational reliability of functional units and interfaces. At the same time, sufficient lightning protection circuits are designed. By adding transient suppressors (TVS tubes) and transient protection devices, the lightning protection capability is increased, further improving reliability.

[0050] In one embodiment, the performance and quality of the power supply system are crucial factors in ensuring the overall performance of the device. In addition to meeting airborne power capacity requirements, the system must also demonstrate power supply characteristics that meet regulatory requirements under various aircraft operating conditions, including steady-state, transient, and conversion performance. The remote interface unit operates in harsh environments, requiring the power supply unit to exhibit precise voltage stability, minimal ripple, and increased reliability. To this end, the present invention incorporates a complete, highly reliable dual-circuit power supply system into the device.

[0051] like Figure 2 As shown in the figure, in order to reduce the size and weight, improve the efficiency and reduce the temperature rise, the power supply unit adopts a high-frequency switching power supply solution, which is mainly composed of an input isolation circuit, an input filter circuit, an overvoltage / undervoltage surge power-off delay and anti-backflow circuit, a DC / DC converter and an output filter circuit.

[0052] like Figure 3As shown, the input isolation circuit of the dual-power system is configured with two independent MOS switches and an O-ring controller to achieve switching between normal and emergency power supplies. This device uses both normal and emergency power supplies, with internal dual power supply isolation. Both the normal and emergency 28V power inputs are isolated. Two O-ring controllers are used to control two MOS transistors, each forming an ideal diode, to achieve seamless switching between the two inputs. This also avoids the heat and efficiency loss caused by diodes. The isolation provided by the MOS transistors prevents internal device faults from affecting other devices or causing power system failures. It also prevents the device from being affected by reversed input polarity or phase sequence due to reversed positive and negative wiring.

[0053] In a specific embodiment, the present invention achieves unified centralized acquisition of analog and discrete quantities for various physical quantity collection. Specifically, both analog and discrete quantities are converted and transmitted to the PSOC, achieving integrated control-side functionality. Specifically, the logic processing side incorporates both analog and discrete quantity acquisition control architectures.

[0054] like Figure 4 As shown, the analog acquisition control architecture is connected to a 1394B card, an SM3490 chip, an AD581 chip, a Schmitt trigger, and an AD converter; among them, the 1394B card is connected to the 1394 bus, the SM3490 chip is connected to an 8-way RS422 interface, the AD581 chip is connected to a 1-way DC power output interface, the Schmitt trigger is connected to a 3-way square wave frequency signal input interface, and the AD converter is connected to multiple four-wire resistance acquisition interfaces and multiple differential input interfaces.

[0055] Specifically, the AD converter includes a first AD converter, a second AD converter and a third AD converter;

[0056] Among them, the first AD converter is connected to 6 four-wire resistance acquisition interfaces in the range of 0-300Ω; the second AD converter is connected to 3 four-wire resistance acquisition interfaces in the range of 0-4200Ω and 2 differential input interfaces in the range of 0-100mV; the third AD converter is connected to 8 differential input interfaces in the range of 0-10V through a voltage collector.

[0057] In terms of resistance acquisition, a four-wire resistance acquisition solution is used to convert the resistance value to be measured input by the remote interface into the corresponding voltage value for measurement. The voltage across the resistance to be measured is a micro-voltage signal, which needs to be amplified by the amplification and conditioning circuit, and then the first AD converter and / or the second AD converter are used for analog-to-digital conversion, and then transmitted to the programmable fusion chip PSOC through the serial data interface.

[0058] For four-wire resistance acquisition, a separate current source and inductive voltage circuit are used to reduce the impact of the test circuit impedance on the measured resistance value. First, a constant current source is used as a reference working current to pass through the resistor under test. Since the current value is constant, the measured resistance value is converted into a corresponding voltage value for measurement. The voltage across the resistor under test is a micro-voltage signal, which needs to be amplified by an amplification and conditioning circuit. Then, a 16-bit A / D converter chip is used for analog-to-digital conversion and sent to the main control PSOC via a 16-bit data line.

[0059] In terms of voltage acquisition, the voltage input to the voltage collector from the differential input interface is subjected to analog gain adjustment and filtering, and the processed data is transmitted to the programmable fusion chip PSOC.

[0060] Discrete quantity acquisition is an important function of the device of the present invention. Discrete quantity is a discrete, separate signal with an extremely low input bandwidth. The system in which this device is located requires dozens to hundreds of discrete quantity signals to represent the status and information of various indicator lights, switch valves, motor rotation, etc. on the helicopter. Discrete quantity signals in airborne systems are generally divided into three types: "ground / open", "voltage / ground" and "voltage / open", where the voltage varies depending on the different aircraft systems and can be in the form of +10V, +15V, +28V, etc. Each discrete quantity channel needs to use a circuit to convert these voltages into a logic level that the controller can handle to complete the acquisition and control of its status. The processing of discrete quantity signals includes two parts: one is signal acquisition and control, and the other is isolation protection of the interface.

[0061] like Figure 5 As shown in the figure, the discrete quantity acquisition control architecture includes multiple discrete quantity signal acquisition channels, each of which includes a digital isolator and a discrete quantity acquisition chip. After filtering, the multiple discrete quantity signals are input into different discrete quantity acquisition chips. The discrete quantity acquisition chips then transmit the converted logic levels through digital isolators to the corresponding interfaces of the programmable fusion chip (PSOC). Configuration information sent by the PSOC can be used to configure the acquisition chips as ground / open discrete or 28V / open discrete types through the digital isolators. Both types of discrete quantity input signals are conditioned and isolated at the front end before being directly fed into the corresponding interfaces of the PSOC.

[0062] The internal control logic of the programmable fusion chip PSOC parses the received interface data and stores the parsed data in the dual-port RAM for access by the main controller; the control logic of the programmable fusion chip PSOC obtains the configuration data required to be output by the main controller through the dual-port RAM, and the programmable fusion chip PSOC outputs these configuration data to the corresponding discrete quantity acquisition chip configuration register after passing through the digital isolator.

[0063] In one embodiment, the logic processing end is configured with an FPGA logic based on a programmable logic lookup table driven mode, the lookup table driven mode is a main process of FPGA digital logic implementation, according to the encoding representation of the position information, the unique identification of the different position information of the whole machine is realized, combined with the position information coding interpretation function in the data interface, the adaptive identification of the interface to the position information is realized, and the interface function is configured according to the position information, which meets the sensor and actuator interface adaptation of the whole machine. Since different position sensors have different requirements for the safety level required to receive and execute data for task execution, the position information identification can uniquely distinguish the task type and the safety level, so the redundancy configuration required by the mechatronic system for different safety level task execution can be supported.

[0064] The FPGA logic is mainly oriented to the PL side of the PSOC, and the main interface logic and part of the control logic are designed by using a hardware description language, mainly composed of a clock management module, a reset management module, an interrupt management module, an XADC module, a UART module, an ADC acquisition module, a discrete quantity SPI interface, a discrete quantity GPIO interface, a 1394 card PCIE interface, etc., used to realize the receiving and sending of RS-422A serial port data, AD sampling, discrete quantity SPI interface distribution connection, discrete quantity GPIO interface distribution connection and 1394 card PCIE communication link function; also used to assist in realizing BIT self-checking, various command functions, terminal management and auxiliary debugging functions. The PS side of the PSOC chip realizes the control of the interface and the processing of the data, and the PL side logic and the PS side software work together to complete the corresponding data processing.

[0065] Next, the PS side software system part of the PSOC chip is further described. The system processing (PS) end includes four ARM processor cores, one of which is used to run an embedded operating system, and the other three reserved ARM processor cores are used for scheduling redundancy, which can improve the stability and reliability of the operating system kernel, file system and peripheral driver, and also provides a lot of redundant resources. When one ARM processor core fails or abnormally, the remaining ARM processor cores realize real-time monitoring and takeover of the abnormal core state; at the same time, the reserved ARM processor cores are also used to support subsequent device upgrade iteration.

[0066] The system processing end is equipped with a software system, such as Figure 6As shown in the figure, the software system includes a bootloader, a BSP board support package, an embedded real-time operating system, device driver software and functional software; among them, the functional software has data acquisition function, online upgrade function, protocol parsing and execution function and periodic reporting function; the device driver software has machine position identification function, CAN bus driver function, RS422 interface driver function, 1394B daughter card driver function, discrete interface driver function and analog interface driver function.

[0067] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. Reference can be made to the common and similar parts between the various embodiments. For the devices disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple, and the relevant parts can be referred to the method description.

[0068] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A remote interface status acquisition and control device based on programmable logic components, characterized in that: The device uses a programmable fusion chip PSOC as the core board, and the programmable fusion chip PSOC is divided into a logic processing end and a system processing end; The logic processing end is used to complete analog quantity acquisition, analog quantity output, discrete quantity acquisition, discrete quantity output and protocol conversion between different types of interfaces; The system processing end communicates with the logic processing end via an AXI bus. The system processing end is equipped with a software system for realizing control of a remote interface and processing of data.

2. The remote interface status acquisition and control device based on programmable logic components according to claim 1, characterized in that: It also includes a dual-power supply system, which includes an input isolation circuit. The input isolation circuit is configured with two independent MOS switch tubes and an O-ring controller for realizing switching between normal power supply and emergency power supply.

3. The remote interface status acquisition and control device based on programmable logic components according to claim 2, characterized in that: The dual-circuit power supply system further includes an input filter circuit, an overvoltage / undervoltage surge power-off delay anti-backflow circuit, a DC / DC converter and an output filter circuit, which are sequentially connected after the input isolation circuit.

4. The remote interface status acquisition and control device based on programmable logic components according to claim 1, characterized in that: The logic processing end is equipped with an analog quantity acquisition control architecture and a discrete quantity acquisition control architecture; The analog quantity acquisition control architecture is connected to a 1394B card, an SM3490 chip, an AD581 chip, a Schmitt trigger and an AD converter; wherein the 1394B card is connected to the 1394 bus, the SM3490 chip is connected to an 8-way RS422 interface, the AD581 chip is connected to a 1-way DC power output interface, the Schmitt trigger is connected to a 3-way square wave frequency signal input interface, and the AD converter is connected to multiple four-wire resistance acquisition interfaces and multiple differential input interfaces; The discrete quantity acquisition control architecture includes multiple discrete quantity signal acquisition channels, and each discrete quantity signal acquisition channel includes a digital isolator and a discrete quantity acquisition chip.

5. The remote interface status acquisition and control device based on programmable logic components according to claim 4, characterized in that: The AD converter includes a first AD converter, a second AD converter and a third AD converter; Among them, the first AD converter is connected to 6 four-wire resistance acquisition interfaces in the range of 0-300Ω; the second AD converter is connected to 3 four-wire resistance acquisition interfaces in the range of 0-4200Ω and 2 differential input interfaces in the range of 0-100mV; the third AD converter is connected to 8 differential input interfaces in the range of 0-10V through a voltage collector; In terms of resistance acquisition, a four-wire resistance acquisition solution is used to convert the resistance value to be measured input from the remote interface into the corresponding voltage value for measurement, and then the first AD converter and / or the second AD converter are used to perform analog-to-digital conversion, and the result is transmitted to the programmable fusion chip PSOC through the serial data interface; In terms of voltage collection, analog gain adjustment and filtering are performed on the voltage input from the differential input interface to the voltage collector, and the processed data is transmitted to the programmable fusion chip PSOC.

6. The remote interface status acquisition and control device based on programmable logic components according to claim 4, characterized in that: After passing through the filtering circuit, multiple discrete quantity signals are input into different discrete quantity acquisition chips. The discrete quantity acquisition chips send the converted logic levels to the corresponding interfaces of the programmable fusion chip PSOC through the interface after passing through the digital isolator. The internal control logic of the programmable fusion chip PSOC parses the received interface data and stores the parsed data in the dual-port RAM for access by the main controller. The control logic of the programmable fusion chip PSOC obtains the configuration data required to be output by the main controller through the dual-port RAM. The programmable fusion chip PSOC outputs these configuration data to the corresponding configuration registers of the discrete quantity acquisition chip after passing through the digital isolator.

7. The remote interface status acquisition and control device based on programmable logic components according to claim 4, characterized in that: The discrete quantity signal types collected by the discrete quantity acquisition control architecture include: ground / open discrete quantity, voltage / ground discrete quantity and voltage / open discrete quantity, wherein the voltage includes +10V, +15V and +28V.

8. The remote interface status acquisition and control device based on programmable logic components according to claim 1, characterized in that: The logic processing end is configured with FPGA logic based on a lookup table drive mode of programmable logic. The FPGA logic is used to realize the reception and transmission of RS-422A serial port data, AD sampling, discrete SPI interface allocation connection, discrete GPIO interface allocation connection and 1394 card PCIE communication link functions; it is also used to assist in realizing BIT self-test, various command functions, terminal management and auxiliary debugging functions.

9. The remote interface status acquisition and control device based on programmable logic components according to claim 1, characterized in that: The system processing end includes four ARM processor cores, among which one ARM processor core is used to run the embedded operating system, and the other three ARM processor cores are reserved for scheduling redundancy; when one ARM processor core fails or is abnormal, the remaining ARM processor cores can realize real-time monitoring and takeover of the abnormal core status; at the same time, the reserved ARM processor core is also used to support subsequent equipment upgrades and iterations.

10. The remote interface status acquisition and control device based on programmable logic components according to claim 1, characterized in that: The system processing end is equipped with a software system, which includes a bootloader startup program, a BSP board support package, an embedded real-time operating system, device driver software and functional software; wherein, the functional software has data acquisition function, online upgrade function, protocol parsing and execution function and periodic reporting function; the device driver software has machine position identification function, CAN bus driver function, RS422 interface driver function, 1394B daughter card driver function, discrete interface driver function and analog interface driver function.

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