[utility model content]
The purpose of the utility model is to provide a kind of 1553B bus network test macros, can accurately determine fault typeAnd fault point is positioned.
The utility model uses following technical scheme: a kind of above-mentioned 1553B bus network test macro, including signal hairSend device, signal receiver and the standard attenuator for calibration signal transmitter and signal receiver, sender unit and signalReceiver is respectively used to send and receive test signal by the different subports of 1553B bus network, and tests according to issuingThe electric current of signal and the insertion loss for receiving test signal judge the malfunction of 1553B bus network；
Sender unit includes signal generation and control unit, and signal occurs and control unit is connected separately with indicating faultUnit, operating mode control unit, signal output driving unit and signal code detection unit, signal output driving unit also withSignal code detection unit is connected, and signal occurs and control unit, signal output driving unit and signal code detection unitIt is connected to same power supply unit；
Signal occurs and control unit is for generating proper testing signal and shielding test signal, and is sent to signal outputDriving unit；It is also used to compare current detecting result and theory output electric current, and in current detecting results abnormity, leads toIt crosses fault indication function unit and issues warning；
Signal output driving unit is used to amplify proper testing signal or shielding test signal and through signal codeDetection unit is sent to the subport of 1553B bus network；
Signal code detection unit is used to carry out current detecting to proper testing signal or shielding test signal, and by electric currentTesting result is sent to signal generation and control unit；
Operating mode control unit is used for the operating mode of adjustment signal transmitter.
Further, operating mode includes shielding test pattern and normal test mode.
Further, signal receiver includes channel selection unit, and channel selection unit passes sequentially through signal amplifier, differenceAmplifier, gain-programmed amplifier, high-speed a/d acquisition unit is divided to be connected to CPU processing unit, CPU processing unit also connects respectivelyIt is connected to usb bus interface, output driving unit, keyboard buffer input unit and power supply unit；
Channel selection unit is carried out for selecting different channels with the output signal to 1553B bus network subportAcquisition, and collected signal is sent to difference amplifier by signal amplifier；
Difference amplifier is for being converted into single-ended signal for received differential signal and being sent to gain-programmed amplifier；
Gain-programmed amplifier is used to provide the amplification of different gains for received signal, and sends supreme speed A/D acquisitionUnit；
High-speed a/d acquisition unit is used to received analog signal being converted to digital signal, and it is single to be sent to CPU processingMember；
CPU processing unit obtains the insertion loss of signal, and according to insertion loss for analyzing received signalThe malfunction of 1553B bus network is obtained with internal preset model judgement；It is also used to will test result and is sent to output drivingUnit, to be prompted by output driving unit to testing staff.
Further, power supply unit includes energy-storage units, energy-storage units be connected separately with voltage transformation module and charging andProtection location, voltage transformation module are respectively connected to signal generation and control unit, signal output driving unit and signal codeDetection unit.
The another technical solution of the utility model: believe used in the above-mentioned 1553B bus network test macro of one kindNumber transmitter, including signal occurs and control unit, signal occurs and control unit is connected separately with fault indication unit, workMode controlling unit, signal output driving unit and signal code detection unit, signal output driving unit also with signal codeDetection unit is connected, and signal occurs and control unit, signal output driving unit and signal code detection unit are connected toSame power supply unit；
Signal occurs and control unit is for generating proper testing signal and shielding test signal, and is sent to signal outputDriving unit；It is also used to compare current detecting result and standard output electric current, and in current detecting results abnormity, lead toIt crosses fault indication function unit and issues warning；
Signal output driving unit is used to amplify proper testing signal or shielding test signal and through signal codeDetection unit is sent to the subport of 1553B bus network；
Signal code detection unit is used to carry out current detecting to proper testing signal or shielding test signal, and by electric currentTesting result is sent to signal generation and control unit；
Operating mode control unit is used for the operating mode of adjustment signal transmitter.
The another technical solution of the utility model: believe used in the above-mentioned 1553B bus network test macro of one kindNumber receiver, including channel selection unit, channel selection unit pass sequentially through signal amplifier, difference amplifier, programme-controlled gainAmplifier, high-speed a/d acquisition unit are connected to CPU processing unit, and usb bus interface, defeated is also respectively connected in CPU processing unitDriving unit, keyboard buffer input unit and power supply unit out；
Channel selection unit is carried out for selecting different channels with the output signal to 1553B bus network subportAcquisition, and collected signal is sent to difference amplifier by signal amplifier；
Difference amplifier is for being converted into single-ended signal for received differential signal and being sent to gain-programmed amplifier；
Gain-programmed amplifier is used to provide the amplification of different gains for received signal, and sends supreme speed A/D acquisitionUnit；
High-speed a/d acquisition unit is used to received analog signal being converted to digital signal, and it is single to be sent to CPU processingMember；
CPU processing unit obtains the insertion loss of signal, and according to insertion loss for analyzing received signalThe malfunction of 1553B bus network is obtained with internal preset model judgement；It is also used to will test result and is sent to output drivingUnit, to be prompted by output driving unit to testing staff.
The beneficial effects of the utility model are: deriving all kinds of failures of 1553B bus network by simple mathematical modelWith the relationship of insertion loss, and use a set of test macro being made of signal generator, signal receiver, to 1553B busThe insertion loss of network measures, so that it may carry out physical layer positioning to all kinds of fault modes, prompt fault point, record testParameter directly searches failure and positioning failure, customary inspection row to use, safeguarding that 1553B bus network personnel provide one kindIt looks into potential faults, directly search and position the effective means of existence doubtful failure.
[specific embodiment]
The utility model is described in detail with reference to the accompanying drawings and detailed description.
The invention also discloses a kind of 1553B bus network test macros, as shown in Figure 1, being standard 1553B busNetwork electrical structural schematic diagram.The signal of given frequency and amplitude is sent in one subport of 1553B bus network, at anotherSubport receives the signal, and is compared with preset mathematical model, thus judge each coupler in 1553B network, terminal,Whether connector, conducting wire are in shape.
The system specifically includes sender unit, signal receiver and for calibration signal transmitter and signal receiverStandard attenuator (i.e. attenuator), sender unit and signal receiver are respectively used to the son different by 1553B bus networkPort sends and receives test signal, and is judged according to the electric current for issuing test signal and the insertion loss for receiving test signalThe malfunction of 1553B bus network.Attenuator is to ensure that the essential important accessory of tester normal work and use.Such asIt is the schematic diagram of attenuator shown in Fig. 2, Zo=75 ohm, its pad value is -12 ± 0.1dB, is encapsulated in a shieldingIn aluminium alloy box, after connection test platform voltage source and system start successfully every time, the both ends of attenuator are sent out with signal respectivelyThe input terminal of raw device output end and signal receiver connects, to initialize to the data processing system in signal receiverCalibration.
Sender unit generates the signal of specific frequency, and the frequency signal is defeated by the subport in 1553B bus networkEnter into bus, by reception, parsing, the judgement of monitoring and signal receiver to output signal electric current, reaches total to 1553BThe test of gauze network indices.
As shown in figs. 3 and 5, sender unit includes signal generation and control unit 11, is the core device of sender unitPart is programmed using CPLD (EPM3064) and realizes output waveform setting and the measurement to output electric current, and then judges MIL-STD-The following problems of 1553B bus network:
MIL-STD-1553B bus network test equipment is normal；
The bus port short circuit of MIL-STD-1553B bus network test equipment；
MIL-STD-1553B bus network test equipment bus port open circuit；
MIL-STD-1553B bus network test equipment bus port and shielding short circuit；
The subport short circuit of MIL-STD-1553B bus network test equipment；
MIL-STD-1553B bus network test equipment subport open circuit；
MIL-STD-1553B bus network test equipment subport and shielding short circuit.
Signal occurs and control unit 11 is for generating proper testing signal and shielding test signal, can not only measureThe continuity of 1553B bus can also measure the continuity of its outer shield layer, and test signal is sent to signal output and is drivenMoving cell 13.Signal occurs and control unit 11 is also used to compare current detecting result and theory output electric current, andWhen current detecting results abnormity, is issued and warned by fault indication function unit 10, fault indication function unit 10 can basisActual needs is set as warning lamp or siren.
Signal occurs and control unit 11 generates frequency signal needed for measuring 1553B bus network, in order to connect signalDevice energy automatic distinguishing shielding test or proper testing are received, and output signal is divided into screening frequencies signal and normal frequency letterNumber, screening frequencies signal is preferably 33.333KHz, and normal frequency signal is preferably 333.33KHz.
Signal occurs and control unit 11 is connected separately with fault indication unit 10, operating mode control unit 12, signalOutput driving unit 13 and signal code detection unit 14.The adjustment signal transmitter as needed of operating mode control unit 12Operating mode, i.e. shielding test pattern and normal test mode.
When for shielding test pattern, the output end of sender unit is connected with 15553B bus and shielded layer, letterThe receiving end of number receiver is connected with 15553B bus and shielded layer.
When the output end for unmasked test pattern, sender unit is connected with 15553B bus, signal receiverReceiving end is connected with 15553B bus.
Signal output driving unit 13 is used to amplify proper testing signal or shielding test signal and through signal electricityStream detection unit 14 is sent to the subport of 1553B bus network.
Signal code detection unit 14 is used to carry out current detecting to proper testing signal or shielding test signal, and will be electricStream testing result is sent to signal generation and control unit 11.By measuring the source current of power stage, electric current is converted to electricityPressure is fed to the current detecting end (OVER_A) of signal generation and control unit 11, and current detecting end is according to logic, to 1553BBus network is judged, malfunction is provided.
Signal output driving unit 13 is also connected with signal code detection unit 14, signal occur and control unit 11,Signal output driving unit 13 and signal code detection unit 14 are connected to same power supply unit.
The signal that signal receiver is transmitted to receive signal generator by 1553B bus network, quantifies itProcessing, and then its insertion loss is calculated, by logic analysis, judge the type and position that 1553B bus network breaks down.
As shown in figure 4, signal receiver includes channel selection unit 25, channel selection unit 25 is used to select different lead toRoad, as shown in figure 12, principle are relatively simple, when CPU processing unit 20 collects the signal frequency of sender unit, according to justOften test, shielding test requirement, control actuation/release of relay, with realize to STUB it is high-end to low side, it is high-end to screenThe acquisition of layer, low side to three kinds of signals of shielded layer is covered, and collected signal is sent to difference by signal amplifier 26 and is putBig device 27.
It as shown in figure 11, is the circuit diagram of signal amplifier 26, signal amplifier 26 is used for the pre- place of input signalReason makes it under the premise of meeting input buffering, moreover it is possible to meet input impedance requirement, bandwidth requirement and single-ended, difference requirement.It is defeatedEnter buffering to realize using high-speed, high precision operational amplifier, but when input signal is difference form, when signal has single-ended" signal+" and " signal ground " becomes " signal+", " signal-" and " signal ground ", can be with if directly selecting difference amplifier 27Realize signal buffer, but input impedance is unable to satisfy > 1M Ω requirement；If selecting instrument amplifier, input impedance may be implementedIt is required that but instrument amplifier speed it is lower, and be unable to satisfy signal bandwidth requirement；The utility model proposes to difference " letterNumber+" and " signal-" buffered using high-speed, high precision operational amplifier, then reuse difference amplifier in rear classMethod.
When input is single-ended mode, single-ended " signal+" is directly inputted to the positive input terminal in channel, the negative input in channelEnd ground connection, " signal ground " is connect with " signal ground " of signal receiver simultaneously；When input is difference modes, difference " signal+"It is input to the positive input terminal in channel, difference " signal-" is input to the negative input end in channel, while difference " signal ground " connects with signalReceive " signal ground " connection of device.
It as shown in Figure 10, is the circuit diagram of difference amplifier 27, difference amplifier 27 is for believing received differenceIt number is converted into single-ended signal, realizes that differential signal meets the requirement of A/D input signal, and be sent to gain-programmed amplifier 28.Difference amplifier 27 can believe input to avoid the low input impedance of difference amplifier in this way in the rear class of signal input amplifierNumber influence.Different acquisition channels have difference amplifier independent, this can effectively improve AD acquisition channel everyFrom degree.As shown in figure 9, being the circuit diagram of gain-programmed amplifier 28, gain-programmed amplifier 28 is used to be received letterNumber the amplification of different gains is provided, and sends supreme speed A/D acquisition unit 24, use specific variable gain amplifier chipAnd its peripheral circuit is realized, is controlled by CPU processing unit 20, it is right in different input signal (i.e. the differences of input range)Input signal provides the amplification of different gains, and when input signal range changes, gain-programmed amplifier 28 be can changeIt is input to the signal amplitude of A/D chip, makes it under the premise of meeting A/D input range, reaches maximum signal-to-noise ratio, improves systemSystem acquisition precision.
As shown in figure 8, being the circuit diagram of high-speed a/d acquisition unit 24, high-speed a/d acquisition unit 24 will be for that will receiveAnalog signal be converted to digital signal, and be sent to CPU processing unit 20.High-speed a/d acquisition unit 24 is that entire signal connectsThe core for receiving device, the analog signal accurate transformation for passing over sender unit by 1553B bus network are digitalSignal calculates insertion loss by logic analysis and judges 1553B for CPU processing unit 20 according to established mathematical modelThe type and position that bus network breaks down.High-speed AD acquisition unit 24 is entire signal receiver signal Switching Core, directlyConnect the superiority and inferiority for being related to acquisition signal quality and the correct judgement to 1553B bus network failure.The unit by A/D chip and itsPeripheral circuit composition.Since the minimum signal amplitude converted is mV grade, in order to improve signal quality, sampling noise is reduced, in realityIt should be noted that the selection of grounding point when the circuit design of border and use a variety of filtering modes, power supply noise is made to be reduced to minimum.
As shown in fig. 7, be the design schematic diagram of CPU processing unit 20, CPU processing unit 20 be used for received signal intoRow analysis obtains the insertion loss of signal, and is obtained according to insertion loss and internal preset model (i.e. preset threshold) judgementThe malfunction of 1553B bus network；It is also used to will test result and is sent to output driving unit 22, to pass through output driving listMember 22 is prompted to testing staff.CPU processing unit 20 is the control centre of signal receiver, realizes signal by the unitCalibration, gain control, differential path selection, the acquisition storage of data, usb bus interface, keyboard scan, as the result is shown, soundAlarm etc..CPU processing unit 20 mainly completes following work:
The gain for changing gain-programmed amplifier 28 according to signal input quantity journey, makes it in the premise for meeting AD input rangeUnder, reach maximum signal-to-noise ratio, improves system acquisition precision.
Differential path input mode is selected, is realized by 25 selective relay of channel selection unit.
The storage of control acquisition data, and acquisition data are sequential read out from SRAM, it is transmitted to by usb bus interface 21Host computer.
By usb bus interface 21, realize that usb data is read, usb data is write, usb data writes flow control.
Channel selection unit 25 passes sequentially through signal amplifier 26, difference amplifier 27, gain-programmed amplifier 28, high speedA/D acquisition unit 24 is connected to CPU processing unit 20, and usb bus interface 21, output is also respectively connected in CPU processing unit 20Driving unit 22, keyboard buffer input unit 23 and power supply unit.
Keyboard buffer input unit 23 is inputted for scanning external key, including measurement, calibration, record and help four are pressedKey, the circuit realize the transformation of actuation of keys to CPU input logic.
Output driving unit 22 is used to test result being shown to exterior display screen, and mentions on a display screen for userFor operating side group, when measurement terminates or measures under abnormal conditions, driving external buzzer sounding, (measurement terminates and measures abnormalIssue two different sound), aviation field is met convenient for the remote-controlled operation of transmitter by auditory tone cues operatorOperation requires.
Usb bus interface unit can be convenient to be interconnected with CPU, for external connection keyboard, mouse come convenient for users toOperation, can also external USB flash disk, to receiver carry out system upgrade or storage test data.
Power supply unit facilitates user to use in the case where lacking condition of power supply, including energy-storage units 16, energy-storage units 16Lithium battery can be selected, has the characteristics that service life high-environmental, as shown in fig. 6, energy-storage units 16 are connected separately with voltage transformationUnit 17 and charging and protection location 15, charging and protection location 15 can be convenient lithium battery and extraneous docking charging, and voltage becomesIt changes unit 17 and is respectively connected to signal generation and control unit 11, signal output driving unit 13 and signal code detection unit14, the output voltage of lithium battery can be converted, be converted into the preset voltage value that can be used, signal occurs and controlUnit 11 supplies 3.3V voltage, and signal output driving unit 13 and signal code detection unit 14 supply 5V voltage.Voltage transformationThe unstable single voltage transformation of lithium battery is various stable operating voltages needed for receiver by unit 17.
Above-mentioned 1553B bus network test macro application method is as follows:
As shown in Figure 1, its child node of the MIL-STD-1553B bus network of standard can have it is N number of.By " GJBThe digital time-devision system instruction-response type multiplex data bus of 289A-97 " standard regulation, the terminal coupling resistance in Fig. 1The resistance value of Zo is equal, and the umber of turn ratio of the Fault Isolation resistance R=0.75Zo of coupler, coupling transformer areItsEquivalent mathematical model as shown in Fig. 2, the load of sub-line port, cable transmission be lost and network on other couplers influenceIn the case where negligible:
Voltage=Vin of AB point；
Therefore between A-B input signal, in G-H point measuring signal:
For insertion loss theoryValue；
In the 1553B bus network that can be operated normally at one, a possibility that breaking down, has:
1) short circuit between bus port or sub-line port signal line:
When short-circuit between bus port or sub-line port signal line, VCD=VGH=0, i.e. Vout tends to 0, at this time
On the other hand, as seen from Figure 2, when the short circuit of group line end mouth, for sender unit, it is short to be equivalent to outputRoad, and when bus port short circuit, due to the effect of isolation resistance, for sender unit, it is equivalent to output overload.
It is not difficult to calculate, in normal condition, the theoretical current I of sender unit1:
When bus port short circuit, actual current Iout:
Electric current ratio
Sender unit theory exports electric current I when 1553B bus network is normal1For 40~60mA, in the present embodiment weWith I1For=40mA.The setting signal current detecting unit 14 in sender unit, when detecting that output signal electric current (believesThe operating current of number generator) it is greater than 130% and normal current (the i.e. 60mA < I less than 250%out< 100mA), and signalThe insertion loss measured in receiverWhen less than -20dB, it is believed that bus port short circuit.
When detecting 250% normal current (i.e. I of output signal electric current >out> 100mA), andWhen, it canTo think subport short circuit.
In general, working asFor actual measured value, it is believed that short-circuit between bus or sub-line signal wire.ElectricityStream detection unit is provided only on signal generating unit, but in order to minimize, signal generating unit does not have accurate display unit；OnlyTo/the normal signal that is out of order, signal receiving unit is only capable of read-out voltage signal, since various faults can lead to insertion lossVariation, therefore need binding signal generator whether short circuit confirms fault type.
2) bus port signal wire connection open circuit:
Bus port open-circuit fault can generally be equivalent to one or two terminal coupling resistance Zo open circuit.
When a terminal coupling resistance Zo opens a way；
When two terminal coupling resistance Zo open a way:
Therefore, whenWhen, and 1.5mA < Iout< 10mA then can determine whether as bus port open circuit.
3) subport signal wire connection open circuit:
Subport open-circuit fault can generally be equivalent to isolation resistance R open circuit, when isolation resistance R open circuit, according to " GJBThe digital time-devision system instruction-response type multiplex data bus of 289A-97 " standard regulation, input pull-down impedance >3000Ω；When network is normal, subport input impedance is answered are as follows:
Electric current ratio
By the regulation of " the digital time-devision system instruction-response type multiplex data bus of GJB 289A-97 " standard, Zo=75Ω.Obviously, when R opens a way, there is subport open-circuit fault, the output electric current of sender unit can be worked normally far smaller thanTherefore current detecting unit 14 is arranged in electric current in sender unit, when detecting the normal electricity of output signal electric current < 3.75%(I when streamout< 1.5mA), it is believed that subport open circuit.
4) short-circuit between subport signal wire and shielded layer:
Sender unit output is one group of differential signal, therefore, when short-circuit between signal wire side and shielded layer, letterNumber can be with normal transmission, but there are the potential faults such as information leakage.Inside sender unit, it is equipped with bonding and switchs, whenWhen by bonding, if it is normal that sender unit exports electric current without short circuit between subport signal wire and shielded layer；OnceThere is short circuit between subport signal wire and shielded layer, then after shielded layer being connected with sender unit ground wire, exports electric current meetingObviously become larger, that is, is greater than 2.5 times of normal current (i.e. Iout> 100mA).Therefore, the output electric current of sender unit is detected, is cooperatedEarthing switch, so that it may judge whether short-circuit between subport signal wire and shielded layer.
5) short-circuit between bus signal line and shielded layer:
As a same reason, when by bonding, if without short circuit, signal hair between bus port signal wire and shielded layerSend device output electric current normal；Once there is short circuit between bus port signal wire and shielded layer, then shielded layer and signal are sentAfter device ground wire is connected, output electric current can obviously become larger, but due to the presence of isolation resistance, subport letter can be less than by exporting electric currentThere is electric current when short circuit number between line and shielded layer, i.e., greater than 1.5 times of normal current and is less than 2.5 times of normal current(i.e. 60mA < Iout< 100mA).Therefore, the output electric current of sender unit is detected, cooperates earthing switch, so that it may judge busIt is whether short-circuit between signal wire and shielded layer.
6) resistance value of the terminal resistance of bus it is overproof (i.e. terminal resistance precision is inadequate, error be more than 10%)
By 2) it is found that (resistance value of a terminal resistance becomes larger when the resistance value of the terminal resistance of 1553B bus network becomes largerOr the resistance value of two terminal resistances becomes larger),When the resistance value of the terminal resistance of bus becomes smaller(resistance value of a terminal resistance becomes smaller or the resistance value of two terminal resistances becomes smaller),
7) insertion loss between some sub-line becomes larger:
Analysis chart 2 it is found that when the insertion loss of some subport becomes larger,Therefore, if in certain heightPort measuresAnd after changing a sub- line end mouthJust it can determine whetherThat subportInsertion loss becomes larger, i.e., the sub-line port resistive becomes larger.
8) in addition, working as IoutWhen > 200mA, signal occurs and control unit 11 cuts off output signal, and forbids voltage defeatedOut, reach protection purpose.
Step 1 carries out initialization of calibration to sender unit and signal receiver by standard attenuator.
Sender unit and signal receiver are calibrated before the test begins, in the different subports of consolidated networkSuccessively measure the insertion loss between two groups of sub-lines one by one, the output electric current of supervisory signal sender, insertion loss etc. are related electricallyIt can parameter.
Can cause the anomalous variation of insertion loss value when all kinds of failures occur for bus network system, this anomalous variation withThe fault type and position occurred has certain corresponding relationship, although this corresponding relationship is not unique in some cases, but still can be according to the anomalous variation of its insertion loss value when detecting bus, and other factors are integrated to analyze and determineThe type to be broken down and position.
Step 2, by sender unit and signal receiver, subports different from 1553B bus network are connected respectively,And open signal transmitter and signal receiver.
Step 3, sender unit include fault indication function unit 10, signal occurs and control unit 11, operating modeControl unit 12 and signal code detection unit 14, signal receiver include CPU processing unit 20 and output driving unit 22.
The operating mode of sender unit is adjusted to proper testing state by operating mode control unit 12 and issues surveyTrial signal detects the actual current I of test signal by signal code detection unit 14out, by actual current IoutWith theory electricityFlow I1It compares, test signal is also received by signal receiver, and detect test signal and be actually inserted into loss
Work as Iout> 2.5I1AndWhen, it is concluded that sender unit connection subport short circuit；
Work as 1.3I1< Iout< 2.5I1AndWhen, it is concluded that 1553B bus network bus port short circuit；
Work as 3I1/ 80 < Iout< I1/ 4 andOr, it is concluded that the bus end of 1553B bus network when -7.96dBMouth open circuit；
Work as Iout< 3I1, it is concluded that the subport open circuit of sender unit connection when/80；
Work as Iout> 5I1When, occurred by signal and control unit 11 cuts off output signal；
Work as Iout∈I1When, then 1553B bus network is normal condition.
The operating mode of sender unit is adjusted to shielding test mode by operating mode control unit 12, and passes through letterActual current I in number current detecting unit 14 detection test sender unitout, by actual current IoutWith theoretical current I1IntoRow comparison:
Work as Iout> 2.5I1When, then the subport of sender unit connection shields short circuit with it；
Work as 1.5I1< Iout< 2.5I1When, then the bus port of 1553B bus network shields short circuit with it；
Work as Iout> 5I1When, occurred by signal and control unit 11 cuts off output signal；
Work as Iout∈I1When, then 1553B bus network is normal condition.
Step 4, signal generation and control unit 11 and CPU processing unit 20 send fault message respectively according to testing resultTo fault indication function unit 10 and output driving unit 22, fault indication function unit 10 and output driving unit 22 are according to eventHinder delivering warning.
The invention also discloses sender unit used in a kind of above-mentioned 1553B bus network test macro, packetsSignal generation and control unit 11 are included, signal occurs and control unit 11 is connected separately with fault indication unit 10, operating modeControl unit 12, signal output driving unit 13 and signal code detection unit 14, signal output driving unit 13 is gone back and signalCurrent detecting unit 14 is connected, and signal occurs and control unit 11, signal output driving unit 13 and signal code detection are singleMember 14 is connected to same power supply unit.
Signal occurs and control unit 11 is for generating proper testing signal and shielding test signal, and it is defeated to be sent to signalDriving unit 13 out；It is also used to compare current detecting result and standard output electric current, and in current detecting results abnormityWhen, it is issued and is warned by fault indication function unit 10；
Signal output driving unit 13 is used to amplify proper testing signal or shielding test signal and through signal electricityStream detection unit 14 is sent to the subport of 1553B bus network；
Signal code detection unit 14 is used to carry out current detecting to proper testing signal or shielding test signal, and will be electricStream testing result is sent to signal generation and control unit 11；Operating mode control unit 12 is used for the work of adjustment signal transmitterOperation mode.
The invention also discloses signal receiver used in a kind of above-mentioned 1553B bus network test macro, packetsChannel selection unit 25 is included, channel selection unit passes sequentially through signal amplifier 26, difference amplifier 27, gain-programmed amplifier28, high-speed a/d acquisition unit 24 is connected to CPU processing unit 20, and usb bus interface is also respectively connected in CPU processing unit 2021, output driving unit 22, keyboard buffer input unit 23 and power supply unit；
Channel selection unit 25 for selecting different channels, with the output signal to 1553B bus network subport intoRow acquisition, and collected signal is sent to difference amplifier 27 by signal amplifier 26；
Difference amplifier 27 is for being converted into single-ended signal for received differential signal and being sent to gain-programmed amplifier28；
Gain-programmed amplifier 28 is used to provide the amplification of different gains for received signal, and sends supreme speed A/D and adoptCollect unit 24；
High-speed a/d acquisition unit 24 is used to received analog signal being converted to digital signal, and it is single to be sent to CPU processingMember 20；
CPU processing unit 20 obtains the insertion loss of signal, and damage according to insertion for analyzing received signalConsumption and internal preset model judgement obtain the malfunction of 1553B bus network；It is also used to will test result and is sent to output driveMoving cell 22, to be prompted by output driving unit 22 to testing staff.
The utility model embedded computer combination digit synthesis and processing technique using being made of, by measuring MIL-Insertion pad value in STD-1553B between each branch line port, and occurred caused by all types of failures according to cable systemJust whether the different Related Mathematical Models of pad value, the differentiation of fast accurate and determining MIL-STD-1553B bus network systemOften and the type that breaks down of MIL-STD-1553B bus network system physical layer and position.
The utility model by design a its frequency, voltage amplitude, size of current be known signal generator andThe signal receiver of gain controllable, by accurately detect its output electric current after being connected with tested MIL-STD-1553B network andInsertion loss, with Related Mathematical Models, to judge tested MIL-STD-1553B network-bus terminal resistance open circuit, busTerminal resistance variation, bus misconnection, bus open circuit, bus short circuit, bus and shielded layer short circuit, sub-line misconnection, sub-line open circuit, sonThe MIL-STD-1553B network most common failures such as line short circuit, sub-line and shielded layer short circuit, and it is by display screen that trouble location is intuitiveDisplay.