CN105490819B - A kind of networking long-distance intelligent interface - Google Patents

Abstract

The present invention is a kind of networking long-distance intelligent interface, including interference prevention processing unit, interface signal pretreatment unit, data processing unit, high speed network interfaces unit and power supply conversion electric power；Interference prevention processing unit is connect with interface signal pretreatment unit；Data processing unit is connect with high speed network interfaces unit, and is connect with interface signal pretreatment unit；Interference prevention processing unit uses em filtering, shields to signal ground, Magnetic isolation circuit, bus Magnetic isolation transceiver；The TVS pipe of anti-lightning HIRF is set, using signal shielding measure；Interface signal pretreatment unit includes signal enhanced processing；Analog signals processing；Discrete magnitude signal processing；Signal anti-noise sonication；The present invention can make to form distributed remote electronic unit using from system level unified planning interface, connected by Unified Network, support Network Interface processing, form general-purpose interface resource.

Description

A kind of networking long-distance intelligent interface

Technical field

The invention belongs to embedded computer system design field, especially a kind of networking long-distance intelligent interface.

Background technique

With the fast development of microelectronics integrated technology, embedded computer, on-board data network technology, IMA system skill Art is developed on an unprecedented scale and is applied, and the distributed IMA that more open, function is more comprehensive towards structure, platform is more general Architectural framework direction is developed.It is effectively integrated for the resource of different application demand, interface, service and tool, at core Reason is mutually separated with interface processing, forms independent general utility functions processing, interface process resource and data exchange, and pass through unified boat Electric network connects, and forming one kind can be towards all applications, more general integrated treatment and the data network platform.Network Change long-distance intelligent interface to adapt to this development trend and generate, it becomes a kind of dedicated Field Replaceable Unit, as IMA One component part of system, provides expansible remote interface and processing capacity.It is a kind of inexpensive, field changeable IMA submodule can be assigned near the aircraft subsystems equipment far from aircraft main process task resource.Their main function It is exactly to provide data between the core processing unit and a series of subsystem sensors, actuator of aircraft by high speed network Interface.Networking long-distance intelligent interface can make to form distributed remote electronics list using from system level unified planning interface Member is connected by Unified Network, is supported Network Interface processing, is formed general-purpose interface resource, and IMA system is made to have variable rule Mould, portable and it is suitable for ability, enhancing system strong fault tolerance and reconfigures ability.

Summary of the invention

In order to solve the technical problem in the presence of background technology, the invention proposes a kind of networking long-distance intelligents to connect Mouthful,

The technical solution of the invention is as follows: a kind of networking long-distance intelligent interface, it is characterised in that: the networking is remote Journey intelligence interface includes interference prevention processing unit, interface signal pretreatment unit, data processing unit, high speed network interfaces list Member and power supply conversion electric power；The interference prevention processing unit is connect with interface signal pretreatment unit；The data processing list Member is connect with high speed network interfaces unit, and is connect with interface signal pretreatment unit；

The interference prevention processing unit uses em filtering, shields to signal ground, Magnetic isolation circuit, bus Magnetic isolation receipts Send out device；The TVS pipe of anti-lightning HIRF is set, using signal shielding measure；

Interface signal pretreatment unit includes signal enhanced processing；Analog signals processing；Discrete magnitude signal processing；Signal Anti-noise sonication；

Data processing unit includes low power processor, FLASH memory, RAM memory, NVRAM memory, resets electricity Road, clock circuit, the control of internal circuit point, watchdog circuit；

High speed network interfaces unit includes host data Fabric Interface, FC network, AFDX network communication protocol and network It is fault-tolerant；

Power supply converting unit includes that direct current 28V input power is converted to internal+5V the power supply ,+15V power supply, -15V used Power supply；Meet GJB 181A requirement, isolated variable is carried out to input voltage, it being capable of instantaneous power-down protection.

Above system further includes BIT design, and exciting test and wrap test circuit, supporting interface high coverage rate BIT is arranged Testing requirement.

Above system further includes Fault Isolation and restoration designing, and system failure logic circuit is arranged, realizes failure system Reworking after reliable excision and fault recovery；

Health monitoring design, is arranged by test point, carries out status monitoring to circuit key point；

Interface self-configures design: setting seat in the plane identifier, by the way that 5 codings are arranged in circuit；Keep different location different The interface autonomous classification of function different driving table realizes different interface functions.

The invention has the advantages that

1, can make distributed remote electronic unit to be formed, by Unified Network using from system level unified planning interface It connects, supports Network Interface processing, form general-purpose interface resource.

2, it supports core general procedure and the specific special purpose interface of system to analyze, makes IMA system that there is scalable, portable Be suitable for ability.

3, there is scene can replace ability, enhance system strong fault tolerance and reconfigures ability.

4, the ability with nearest distributing installation increases system Installation Flexibility, increases interface signal anti-interference.

Detailed description of the invention

Fig. 1 is inventive network long-distance intelligent interface diagram；

Specific embodiment

As shown in Figure 1, inventive network long-distance intelligent interface pre-processes list by interference prevention processing unit, interface signal Member, data processing unit, high speed network interfaces unit and power supply conversion electric power composition, Processing Interface type includes voltage analog Amount, current-mode analog quantity, discrete magnitude, low speed bus interface signal.External interface signals are handled by interference prevention, signal is located in advance Reason is converted to digital signal to the input signal of a large amount of aircraft sensors with defined turnover rate, provides required sensor and swashs It encourages and is calibrated with ground.And using digital filtering and other preprocess methods, value needed for converting a signal into application program.Pass through Grid receives the order of system, is controlled and is exported with defined turnover rate.On other occasions, setting output is alternative Default setting.Networking long-distance intelligent interface can be distributed in the different zones of the forebody of aircraft, middle rear body and rear body, fly Machine can be configured to different remainings according to the position where it, and to meet the regulatory requirement of interface system, he passes through application system Functional configuration of uniting completes system interface status information capture, completes system interface control output, collected system mode is believed Breath is sent to the fusion treatment that aircraft Core data processing system carries out system data information by high speed network.

Networking long-distance intelligent method of interface embodiment is as follows:

A. it networking long-distance intelligent interface overall design approach: is pre-processed by interference prevention processing unit, interface signal single Member, data processing unit, high speed network interfaces unit and power supply conversion electric power composition, Processing Interface type includes voltage analog Amount, current-mode analog quantity, discrete magnitude, low speed bus interface signal etc..Other than each composition unit design method (being described below), also Including unique design have 1. BIT design, exciting test and wrap test circuit, supporting interface high coverage rate BIT test are set Demand；2. system failure logic circuit is arranged in Fault Isolation and restoration designing, the reliable excision of failure system, and event are realized Reworking after barrier recovery；System failure logic circuit is existing circuit form；3. health monitoring designs, pass through survey Pilot setting carries out status monitoring to circuit key point；The setting of test point is present mature technology；4. interface self-configures Design: setting seat in the plane identifier, so that the different driving table of the interface autonomous classification of different location different function realizes difference Interface function.Exciting test and wrap test circuit are to belong to auxiliary circuit, but to maintenance for testing normal function circuit Maintenance has enormous benefits.

B. interference prevention processing unit design method: designing including 1. electromagnetic protection, using em filtering, shields to signal ground It covers, Magnetic isolation circuit, bus Magnetic isolation transceiver；2. the TVS pipe of anti-lightning HIRF is arranged in HIRF protection design；3. antinoise Protection design: using signal shielding measure, reduces extraneous interference, signal good earth.

C. interface signal pretreatment unit design method: including 1. signal enhanced processing, integral amplification, power frequency conversion Amplify Current Voltage conversion amplification；2. analog signals are handled, analog quantity selection, analog-to-digital conversion and input/output interface data lock It deposits；3. discrete magnitude signal is handled, setting first-order filtering, discretization and anti-reverse function, the configuration of discrete magnitude input interface, discrete magnitude Output data latch；4. signal anti-noise sonication, prime uses low-noise amplifier, and improves amplification factor, improves signal and makes an uproar Acoustic ratio.

D. it data processing unit design method: is deposited including low power processor, FLASH memory, RAM memory, NVRAM The design such as reservoir, reset circuit, clock circuit, the control of internal circuit point, watchdog circuit.

E. it high speed network interfaces unit design method: is designed including 1. host data Fabric Interface；2. FC network, AFDX net Network communication protocol design realizes two kinds of functions of data sampling and data queue.3. network fault tolerance designs, network ID is voluntarily obtained, Network remaining fault-tolerant design, fast failure isolation and again Networking Design；

F. it powers converting unit design method: including direct current 28V input power is 1. converted to the internal+5V electricity used Source ,+15V power supply, -15V power supply.2. meeting GJB 181A requirement, isolated variable is carried out to input voltage, it being capable of instantaneous power-down guarantor Shield design；

G. controlling software design method: including 1. system initialization routine, BIT test program, device Drivers, failure Processing routine, data upload program, monitoring software, house dog software；2. digital filtering, data processing, data communication, interruption, Timer and failure tolerant etc..

Claims (3)

1. a kind of networking long-distance intelligent interface, it is characterised in that: the networking long-distance intelligent interface includes at interference prevention Manage unit, interface signal pretreatment unit, data processing unit, high speed network interfaces unit and power supply converting unit；It is described to connect Mouth protective treatment unit is connect with interface signal pretreatment unit；The data processing unit and high speed network interfaces unit connect It connects, and is connect with interface signal pretreatment unit；

The interference prevention processing unit uses em filtering, shields to signal ground, the transmitting-receiving of Magnetic isolation circuit, bus Magnetic isolation Device；The TVS pipe of anti-lightning HIRF is set, using signal shielding measure；

Interface signal pretreatment unit includes signal enhanced processing；Analog signals processing；Discrete magnitude signal processing；Signal anti-noise Sonication；

Data processing unit include low power processor, FLASH memory, RAM memory, NVRAM memory, reset circuit, Clock circuit, the control of internal circuit point, watchdog circuit；

High speed network interfaces unit includes host data Fabric Interface, FC network, AFDX network communication protocol and network fault tolerance；

Power supply converting unit includes that direct current 28V input power is converted to internal+5V power supply ,+15V the power supply, -15V power supply used； Meet GJB 181A requirement, isolated variable is carried out to input voltage, it being capable of instantaneous power-down protection.

2. networking long-distance intelligent interface according to claim 1, it is characterised in that: the networking long-distance intelligent interface Further include BIT design, exciting test and wrap test circuit, supporting interface high coverage rate BIT testing requirement are set.

3. networking long-distance intelligent interface according to claim 2, it is characterised in that: the networking long-distance intelligent interface Further include Fault Isolation and restoration designing, system failure logic circuit is set, realizes the reliable excision and failure of failure system Reworking after recovery；

Health monitoring design, is arranged by test point, carries out status monitoring to circuit key point；

Interface self-configures design: setting seat in the plane identifier, by the way that 5 codings are arranged in circuit；Make different location different function Interface autonomous classification different driving table realize different interface functions.