CN106093676A - Outfield fault detection and diagnosis equipment - Google Patents
Outfield fault detection and diagnosis equipment Download PDFInfo
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- CN106093676A CN106093676A CN201610397055.XA CN201610397055A CN106093676A CN 106093676 A CN106093676 A CN 106093676A CN 201610397055 A CN201610397055 A CN 201610397055A CN 106093676 A CN106093676 A CN 106093676A
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- modulate circuit
- signal
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- test
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/58—Testing of lines, cables or conductors
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/14—Measuring resistance by measuring current or voltage obtained from a reference source
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
- G01R31/1263—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation
- G01R31/1272—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation of cable, line or wire insulation, e.g. using partial discharge measurements
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B23/00—Testing or monitoring of control systems or parts thereof
- G05B23/02—Electric testing or monitoring
- G05B23/0205—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults
- G05B23/0208—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults characterized by the configuration of the monitoring system
- G05B23/0213—Modular or universal configuration of the monitoring system, e.g. monitoring system having modules that may be combined to build monitoring program; monitoring system that can be applied to legacy systems; adaptable monitoring system; using different communication protocols
Abstract
The invention discloses a kind of outfield fault detection and diagnosis equipment, including continuity test modulate circuit, signal imitation modulate circuit, Insulation test modulate circuit, signal acquisition circuit and master controller, continuity test modulate circuit, controls the on off operating mode of cable for detection accessory；Signal imitation modulate circuit, for the performance of detection accessory controller；Insulation test modulate circuit, controls the insulating resistance value of cable for detection accessory；Signal acquisition circuit, controls the make-and-break signal of cable and the performance signals of the accessory controller of signal imitation modulate circuit detection for gathering the adnexa of continuity test modulate circuit detection；Master controller, the adnexa of make-and-break signal and the performance signals of accessory controller and the detection of Insulation test modulate circuit that the adnexa gathered for receiving, analyze and process signal acquisition circuit controls cable controls the insulation resistance value signal of cable.Accuracy of detection of the present invention is high, diagnosis speed is fast, maintainable height.
Description
Technical field
The present invention relates to aero-engine detection field, especially, relate to a kind of outfield fault detection and diagnosis equipment.
Background technology
In aero-engine field, along with novel efficient, high-power engine are continuously updated the replacement, electromotor control
System is more and more accurate, requires more and more higher to safety, reliability and the maintainability etc. of aircraft engine accessory.But,
In the prior art, aircraft engine accessory (such as auxiliary power unit) control cable and the flight-line service process of controller
In be frequently encountered some problem following:
A) aircraft need to scramble execution task time, it is impossible to quickly, accurate control cable to aircraft engine accessory
Detect with performance and the function of controller and assess；
B) the control cable of aircraft engine accessory and controller in the useful life of outfield cannot periodic detection and assessment,
Producer's detection need to be returned, waste a large amount of manpower and materials；
C) when) the control cable of aircraft engine accessory and controller break down, it is impossible to detect quickly and accurately and examine
Disconnected fault, isolates trouble point, can only remove control cable or producer returned by controller, or require that producer messenger carries out troubleshooting.
Therefore, the outfield detection property difference controlling cable and controller of existing aircraft engine accessory and maintainability are low,
It it is a problem demanding prompt solution.
Summary of the invention
The invention provides a kind of outfield fault detection and diagnosis equipment, to solve the control of existing aircraft engine accessory
The technical problem that outfield detection property is poor and maintainability is low of cable and controller.
The technical solution used in the present invention is as follows:
The present invention provides a kind of outfield fault detection and diagnosis equipment, is used for detecting and diagnose aircraft engine accessory to be measured,
Aircraft engine accessory to be measured includes that adnexa controls cable and accessory controller, and outfield fault detection and diagnosis equipment includes that conducting is surveyed
Examination modulate circuit, signal imitation modulate circuit, Insulation test modulate circuit, signal acquisition circuit and master controller, continuity test
Modulate circuit is connected with signal acquisition circuit respectively with signal imitation modulate circuit, Insulation test modulate circuit and signals collecting electricity
Road is connected with master controller respectively,
Continuity test modulate circuit, leads to detection accessory control cable for adnexa control cable is sent pumping signal
Disconnected state；
Signal imitation modulate circuit, drives accessory controller work for simulating the working signal of aircraft engine accessory to be measured
Make the performance with detection accessory controller；
Insulation test modulate circuit, controls the exhausted of cable for adnexa controls cable applying test voltage with detection accessory
Edge resistance value；
Signal acquisition circuit, controls make-and-break signal and the letter of cable for gathering the adnexa of continuity test modulate circuit detection
The performance signals of the accessory controller of number simulated modulation electric circuit inspection；
Master controller, the adnexa gathered for receiving, analyze and process signal acquisition circuit controls the make-and-break signal of cable
With the insulation resistance value signal that the performance signals of accessory controller and the adnexa of Insulation test modulate circuit detection control cable.
Further, outfield fault detection and diagnosis equipment, also include that power supply modulate circuit, power supply modulate circuit are surveyed with conducting
Examination modulate circuit, signal imitation modulate circuit, Insulation test modulate circuit, signal acquisition circuit are connected with master controller, are used for
Carry for continuity test modulate circuit, signal imitation modulate circuit, Insulation test modulate circuit, signal acquisition circuit and master controller
Pumping signal is provided for running voltage and for continuity test modulate circuit.
Further, outfield fault detection and diagnosis equipment, also include communication module, communication module and master controller, power supply
Modulate circuit is connected with Insulation test modulate circuit, for realizing the mutual conversion between RS232 signal and RS422 signal.
Further, outfield fault detection and diagnosis equipment, also include man machine interface, man machine interface and master controller and power supply
Modulate circuit is connected, for switched by fault mode show respectively the adnexa control on off operating mode of cable, insulating resistance value with
And the performance of accessory controller.
Further, continuity test modulate circuit includes pumping signal end points, more than two measured signal end points and multichannel
Signal input unit,
Pumping signal end points is connected with power supply modulate circuit, sends excitation letter for controlling cable to more than two adnexaes
Number；
Multiple signals input block is connected with more than two measured signal end points respectively, for accepting more than two adnexa controls
The pumping signal that cable processed flows through is to detect the break-make of more than two adnexa control cables simultaneously.
Further, continuity test modulate circuit also includes backflow protection unit, flow-restriction and power supply indicating member,
Backflow protection unit is connected between measured signal end points and multiple signals input block, is used for preventing from flowing through adnexa
Control the electric current adverse current of cable；
Power supply indicating member is connected with power supply modulate circuit, is used for showing power work state；Flow-restriction refers to power supply
Show that unit is connected, for power supply indicating member is carried out current-limiting protection.
Further, continuity test modulate circuit also includes self-test unit, and self-test unit is connected with master controller, for root
Control according to the break-make of master controller with the hardware check realizing this continuity test modulate circuit.
Further, multiple signals input block is and door, and self-test unit is relay.
Further, Insulation test modulate circuit includes stimulating module and insulation resistance computing module,
Stimulating module is connected with power supply modulate circuit, for being carried out at boosting by the power supply that power supply modulate circuit provides
Test voltage it is converted into after reason；
Insulation resistance computing module is connected with stimulating module, for the test voltage that stimulating module is changed is applied to adnexa
Control on cable to calculate the insulating resistance value of adnexa control cable.
Further, insulation resistance computing module includes bridge detection circuit, transport and placing device, a/d converter and controller, bridge
Formula testing circuit, transport and placing device, a/d converter and controller are the most sequentially contacted,
Bridge detection circuit, is formed brachium pontis by four resistance, and brachium pontis includes at the first diagonal angle and relative with at the first diagonal angle
At the second diagonal angle arranged, wherein, an arm open circuit in brachium pontis, it is used for accessing adnexa and controls cable；
Transport and placing device, is connected including at the first transport and placing device and the second transport and placing device, the first transport and placing device and the first diagonal angle, the second amplifier
It is connected at device and the second diagonal angle, for being respectively connected to and amplify the magnitude of voltage at the first diagonal angle and the magnitude of voltage at the second diagonal angle；
A/d converter, the magnitude of voltage at the first diagonal angle amplifying transport and placing device and the magnitude of voltage at the second diagonal angle are carried out
Analog digital conversion；
Controller, for calculating the magnitude of voltage at the first diagonal angle of analog digital conversion and the magnitude of voltage at the second diagonal angle
To show that adnexa controls the insulating resistance value of cable.
The method have the advantages that
The outfield fault detection and diagnosis equipment that the present invention provides, uses continuity test modulate circuit, Insulation test conditioning electricity
Road and signal imitation modulate circuit detection accessory respectively controls the on off operating mode of cable and insulating resistance value and accessory controller
Performance.During outfield or army use, it is possible to engine accessory power rating is carried out fast automatic detecting, fault location and divides
Analysis, is especially fighting or during carrying out an urgent task, the application of this technology can be greatly saved each adnexa of electromotor maintenance,
Maintenance time, win more valuable time for fighting or carrying out an urgent task.Accuracy of detection of the present invention is high, diagnosis speed is fast,
Maintainable high.
In addition to objects, features and advantages described above, the present invention also has other objects, features and advantages.
Below with reference to figure, the present invention is further detailed explanation.
Accompanying drawing explanation
The accompanying drawing of the part constituting the application is used for providing a further understanding of the present invention, and the present invention's is schematic real
Execute example and illustrate for explaining the present invention, being not intended that inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the functional block diagram of outfield of the present invention fault detection and diagnosis equipment first embodiment；
Fig. 2 is the functional block diagram of outfield of the present invention fault detection and diagnosis equipment the second embodiment；
Fig. 3 is the functional block diagram of outfield of the present invention fault detection and diagnosis equipment the 3rd embodiment；
Fig. 4 is the circuit theory diagrams of communication module one preferred embodiment in Fig. 3；
Fig. 5 is the circuit theory diagrams of continuity test modulate circuit one preferred embodiment in Fig. 1；
Fig. 6 is the circuit theory diagrams of Insulation test modulate circuit one preferred embodiment in Fig. 1.
Accompanying drawing mark explanation:
10, continuity test modulate circuit；20, signal imitation modulate circuit；30, Insulation test modulate circuit；40, signal is adopted
Collector；50, master controller；60, power supply modulate circuit；70, communication module；71, RS422 communication IC；72, communication turns
Change circuit；73, RS232 communication IC；80, man machine interface；11, pumping signal end points；12, measured signal end points；13, many
Road signal input unit；14, backflow protection unit；15, flow-restriction；16, power supply indicating member；17, self-test unit；31, swash
Encourage module；32, insulation resistance computing module；321, bridge detection circuit；322, transport and placing device；323, a/d converter；324, control
Device.
Detailed description of the invention
It should be noted that in the case of not conflicting, the embodiment in the application and the feature in embodiment can phases
Combination mutually.Describe the present invention below with reference to the accompanying drawings and in conjunction with the embodiments in detail.
With reference to Fig. 1, the preferred embodiments of the present invention provide a kind of outfield fault detection and diagnosis equipment, are used for detecting and examining
Disconnected aircraft engine accessory to be measured, aircraft engine accessory to be measured includes that adnexa controls cable and accessory controller, outfield fault
Checkout and diagnosis equipment includes continuity test modulate circuit 10, signal imitation modulate circuit 20, Insulation test modulate circuit 30, signal
Acquisition Circuit 40 and master controller 50, continuity test modulate circuit 10 and signal imitation modulate circuit 20 and signal acquisition circuit 40
Being connected, Insulation test modulate circuit 30 is connected with master controller 50 with signal acquisition circuit 40, continuity test modulate circuit 10, uses
The pumping signal on off operating mode with detection accessory control cable is sent in adnexa being controlled cable；Signal imitation modulate circuit 20,
Drive accessory controller work with the performance of detection accessory controller for simulating the working signal of aircraft engine accessory to be measured；
Insulation test modulate circuit 30, applies the test voltage insulation resistance with detection accessory control cable for adnexa controls cable
Value；Signal acquisition circuit 40, controls make-and-break signal and the letter of cable for gathering the adnexa of continuity test modulate circuit 10 detection
The performance signals of the accessory controller of number simulated modulation circuit 20 detection；Master controller 50, is used for receiving, analyzing and process signal
The make-and-break signal of the adnexa control cable that Acquisition Circuit 40 gathers and the performance signals of accessory controller and Insulation test are nursed one's health
The adnexa of circuit 30 detection controls the insulation resistance value signal of cable.Specifically, master controller 50 is used for signal analysis, process,
Specify the mode of operation of each module, receive information by RS232 communication and send instruction, setting bounds control algorithm, presetting event
Barrier pattern, completes fault detect, positions and diagnose.
The outfield fault detection and diagnosis equipment that the present embodiment provides, uses the conditioning of continuity test modulate circuit, Insulation test
The on off operating mode of circuit and signal imitation modulate circuit detection accessory control cable respectively and insulating resistance value and adnexa control
The performance of device.During outfield or army use, it is possible to engine accessory power rating is carried out fast automatic detecting, fault location and divides
Analysis, is especially fighting or during carrying out an urgent task, the application of this technology can be greatly saved each adnexa of electromotor maintenance,
Maintenance time, win more valuable time for fighting or carrying out an urgent task.The present embodiment accuracy of detection is high, diagnosis speed
Hurry up, maintainable high.
Preferably, the outfield fault detection and diagnosis equipment that the present embodiment provides, also include power supply modulate circuit 60, power supply is adjusted
Reason circuit and continuity test modulate circuit 10, signal imitation modulate circuit 20, Insulation test modulate circuit 30, signal acquisition circuit
40 are connected with master controller 50, for nursing one's health electricity for continuity test modulate circuit 10, signal imitation modulate circuit 20, Insulation test
Road 30, signal acquisition circuit 40 and master controller 50 provide running voltage and provide excitation letter for continuity test modulate circuit 10
Number.
The outfield fault detection and diagnosis equipment that the present embodiment provides, uses power supply modulate circuit, the most only outfield fault inspection
Each circuit surveying diagnostic device provides running voltage, and provides pumping signal for continuity test modulate circuit, thus significantly
Improve the effective rate of utilization of power supply modulate circuit.
Preferably, as it is shown on figure 3, the outfield fault detection and diagnosis equipment that the present embodiment provides, also include communication module 70,
Communication module 70 is connected with master controller 50, power supply modulate circuit 60 and Insulation test modulate circuit 30, is used for realizing RS232 letter
Number and RS422 signal between mutual conversion.Specifically, see Fig. 4, communication module 70 include RS422 communication IC 71,
Communication switching circuit 72 and RS232 communication IC 73, communication switching circuit 72 and Insulation test modulate circuit 30 and RS232
Communication IC 73 is connected, and RS232 communication IC 73 is connected with master controller 50, RS422 communication IC 71 and
External circuits is connected with RS422 communication IC 71.Insulation test modulate circuit 30 detection be not attached between 2 exhausted
Edge performance is sent to main by the conversion of communication switching circuit 72 and RS232 communication IC 73 with the form of RS232 communication
Controller 50.
The outfield fault detection and diagnosis equipment that the present embodiment provides, is converted to RS422 communication by communication module 70
RS232 communication, thus expand range, make outfield fault detection and diagnosis equipment have more motility and wider array of adaptation
Property.
Preferably, as it is shown on figure 3, the outfield fault detection and diagnosis equipment that the present embodiment provides, also include man machine interface 80,
Man machine interface 80 is connected with master controller 50 and power supply modulate circuit 60, shows adnexa control respectively for being switched by fault mode
The on off operating mode of cable processed and insulating resistance value and the performance of accessory controller.
The outfield fault detection and diagnosis equipment that the present embodiment provides, directly displays adnexa by man machine interface and controls cable
On off operating mode and insulating resistance value and the performance of accessory controller, the display to fault is the most directly perceived, substantially increases user
Operation ease.
Preferably, as it is shown in figure 5, the present embodiment provide outfield fault detection and diagnosis equipment, continuity test modulate circuit
10 include pumping signal end points more than 11, two measured signal end points 12, multiple signals input block 13, backflow protection unit
14, flow-restriction 15 and power supply indicating member 16 and self-test unit 17, pumping signal end points 11 is connected with power supply modulate circuit 60,
Pumping signal is sent for controlling cable to more than two adnexaes；Multiple signals input block 13 respectively with more than two tested letters
Number end points 12 is connected, and controls pumping signal that cables flow through to detect more than two adnexaes simultaneously for accepting more than two adnexaes
Control the break-make of cable.Backflow protection unit 14 is connected between measured signal end points 12 and multiple signals input block 13, uses
In preventing from flowing through the electric current adverse current of adnexa control cable；Power supply indicating member 16 is connected with power supply modulate circuit 60, is used for showing
Power work state；Flow-restriction 15 is connected with power supply indicating member 16, for power supply indicating member 16 is carried out current-limiting protection.
Continuity test modulate circuit 10 also includes that self-test unit 17, self-test unit 17 are connected with master controller 50, for according to main control
The break-make of device 50 controls with the hardware check realizing continuity test modulate circuit 10.Specifically, see Fig. 5, with single group multi input
As a example by signal, flow-restriction 15 include the first diode D1, the second diode D2, the 3rd diode D3, the 4th diode D4,
Five diode D5 and the 6th diode D6, each diode is connected with corresponding measured signal end points 12, is used for preventing electric current inverse
Stream.Power supply indicating member 16 is light emitting diode D7, and light emitting diode D7 is connected with power supply, is used for showing that power work state is
No normally.Flow-restriction 15 includes the first current-limiting resistance R1, the second current-limiting resistance R2, the 3rd current-limiting resistance R3 and the 4th current limliting electricity
Resistance R4, one end of single current-limiting resistance negative pole with single diode respectively is connected, the other end of single current-limiting resistance
Ground connection.Multiple signals input block 13 is multi input and door N1, for improving the efficiency of I/O signals collecting, isolates input and output
Signal.Self-test unit 17 is relay K, master controller 50 control its break-make, for continuity test modulate circuit hardware from
Inspection.Continuity test modulate circuit is made up of the such single group circuit in tens roads to tens tunnels, is sent by power supply modulate circuit 60
Magnitude of voltage as pumping signal, returning of roads up to a hundred measured signal can be realized and survey.
The outfield fault detection and diagnosis equipment that the present embodiment provides, can realize roads up to a hundred quilt by continuity test modulate circuit
Survey returning of signal to survey, thus substantially increase the efficiency of detection, beneficially rapidly removing faults.
The present embodiment provide outfield fault detection and diagnosis equipment, signal imitation modulate circuit be by simple sinusoidal signal,
Square-wave signal is filtered, change, nurse one's health into the frequency signal consistent with engine rotational speed signal (0Hz～8000Hz, precision ±
2Hz)；By photovoltaic conversion, simulate the signal such as thermocouple signal, lubricating oil pressure signal.Concrete signal simulation is as follows:
A) simulation input conversion: (0～45) mV turns (0～10) V, (0～170) mA and turns (0～10) V, (0～5.5) V and turn (0
～10) V, (0～4.3) V turn (0～10) V, precision ± 20mV；
B) simulation output conversion: (-10～+10) V turns isolated (-45～+45) mV, precision ± 20mV；
C) frequency quantity output isolation: (0～8000) ± 1Hz square wave independently exports isolation；
D) frequency quantity input: (0～8000) ± 1Hz square wave input；
E) On-off signal conversion: ground/unsettled TTL that turns of the unsettled TTL that turns, 27V/, ground/5V turns TTL；
F) output switch parameter conversion: TTL turns ground/unsettled (5V/ ground, optocoupler), and it is unsettled that TTL turns 27V/.
The outfield fault detection and diagnosis equipment that the present embodiment provides, signal acquisition circuit part uses wide temperature board to realize:
A) 16 tunnel analogue signal input, (A/D passage), 16bits, input range: 0-10V；
B) 2 road analog signal outputs (D/A passage), 16bits, output area: 0-10V；
C) 96 railway digital I/O signal, it is achieved the input of Transistor-Transistor Logic level signal, output；
D) built-in calculator/intervalometer.
Preferably, as shown in Figure 6, the outfield fault detection and diagnosis equipment that the present embodiment provides, Insulation test modulate circuit
30 include stimulating module 31 and insulation resistance computing module 32, stimulating module 31 and power supply modulate circuit 60, for being adjusted by power supply
The power supply that reason circuit 60 provides is converted into test voltage after carrying out boosting process；Insulation resistance computing module 32 and excited modes
Block 31 is connected, and controls on cable for the test voltage that stimulating module 31 is changed is applied to adnexa to calculate adnexa control electricity
The insulating resistance value of cable.Specifically, insulation resistance computing module 32 includes bridge detection circuit 321, transport and placing device 322, AD conversion
Device 323 and controller 324, bridge detection circuit 321, transport and placing device 322, a/d converter 323 and controller 324 are the most sequentially gone here and there
Even, bridge detection circuit 321, four resistance form brachium pontis, brachium pontis includes at the first diagonal angle and relative with at the first diagonal angle sets
At the second diagonal angle put, wherein, an arm open circuit in brachium pontis, it is used for accessing adnexa and controls cable；Transport and placing device 322, including
It is connected at one transport and placing device and the second transport and placing device, the first transport and placing device and the first diagonal angle, is connected at the second transport and placing device and the second diagonal angle, use
In being respectively connected to and amplify the magnitude of voltage at the first diagonal angle and the magnitude of voltage at the second diagonal angle；A/d converter 323, for amplifier
The magnitude of voltage at the first diagonal angle that device 322 amplifies and the magnitude of voltage at the second diagonal angle carry out analog digital conversion；Controller 324, is used for
Calculate the magnitude of voltage at the first diagonal angle of analog digital conversion and the magnitude of voltage at the second diagonal angle to show that adnexa controls cable
Insulating resistance value.Stimulating module 31 is transformator, and the input of transformator is connected with power supply, the outfan of transformator with
Insulation resistance computing module 32 is connected.Bridge detection circuit 321 include the 5th resistance R7, the 6th resistance R8, the 7th resistance R9 and
8th resistance R10, one end of bridge detection circuit 321 is connected with stimulating module 31, and the other end of bridge detection circuit 321 divides two
Road, leads up to the 5th resistance R7 and the 7th resistance R9 ground connection, separately leads up to the 6th resistance R8 and the 8th resistance R10 ground connection.
The operation principle of Insulation test modulate circuit 30 is as follows:
As shown in Figure 6,28V dc voltage boost is 500V VDCT volts ,direct-current ,test by transformator, and by 500V DC test
Voltage is as the excitation of Insulation test modulate circuit 30, the insulating properties being not attached between 2 for detection, and passes through RS232
Whether Communication Control carries out testing and with the form of RS232 communication, measured insulating resistance value being sent to master controller 50,
When testing, every 500ms updates and once sends data, receives after master controller 50 stops the RS232 communication instruction tested and stops
Only test, and simultaneously close off 500V VDCT volts ,direct-current ,test.Insulation resistance measurement circuit use leakage current test method, by additional directly
The insulation resistance of stream voltage measurement parasitic loop (measurand).Seeing Fig. 3,28V DC voltage by transformer boost is
500V VDCT volts ,direct-current ,test (test voltage), Rx is insulation resistance to be measured, and R7, R8, R9 and R10 are respectively known standard dividing potential drop
And current-limiting resistance, after insulation voltage is added in Insulation test modulate circuit 30, it is assumed that the magnitude of voltage of VDCT volts ,direct-current ,test is U, R7
And the magnitude of voltage between R9 be the magnitude of voltage between U0, R8 and R10 be U1, according to whole circuit law of ohm:
Simultaneous above formula (1)～(3), can obtain insulation resistance Rx is:
Wherein, U0 and U1 in formula (4) is the magnitude of voltage calculated by single-chip microcomputer, has thus calculated absolutely
Edge resistance Rx.It addition, this Insulation test modulate circuit 30 has a maximum advantage, it belongs to bridge circuit, can well
Eliminate the unstable factor that added insulation voltage brings.
The outfield fault detection and diagnosis equipment that the present embodiment provides, has broken conventional outfield and has ensured apparatus insulated and conducting inspection
The situation that brake is discrete and the most integrated, has promoted outfield to ensure the equipment development in Intelligent fault diagnostic techniques field, has promoted
Enter outfield and ensure Device-General, seriation development.The outfield fault detection and diagnosis equipment that the present embodiment provides, according to outfield
Service condition a, it is achieved that key operation of user, highly shortened the testing time and improves the accuracy of test, outside having filled up
The blank of online real-time in-situ detection technique in the guarantee equipment of field, and reach domestically leading level.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for the skill of this area
For art personnel, the present invention can have various modifications and variations.All within the spirit and principles in the present invention, that is made any repaiies
Change, equivalent, improvement etc., should be included within the scope of the present invention.
Claims (10)
1. an outfield fault detection and diagnosis equipment, is used for detecting and diagnosing aircraft engine accessory to be measured, described aviation to be measured
Engine accessory power rating includes that adnexa controls cable and accessory controller, it is characterised in that described outfield fault detection and diagnosis equipment bag
Include continuity test modulate circuit (10), signal imitation modulate circuit (20), Insulation test modulate circuit (30), signal acquisition circuit
(40) and master controller (50), described continuity test modulate circuit (10) and described signal imitation modulate circuit (20) respectively with institute
State signal acquisition circuit (40 be connected, described Insulation test modulate circuit (30) and described signal acquisition circuit (40) respectively with institute
State master controller (50) to be connected,
Described continuity test modulate circuit (10), sends pumping signal to detect described adnexa for described adnexa is controlled cable
Control the on off operating mode of cable；
Described signal imitation modulate circuit (20), drives described adnexa for simulating the working signal of aircraft engine accessory to be measured
Controller work is to detect the performance of described accessory controller；
Described Insulation test modulate circuit (30), applies test voltage to detect described adnexa for described adnexa controls cable
Control the insulating resistance value of cable；
Described signal acquisition circuit (40), is used for gathering the described adnexa control electricity that described continuity test modulate circuit (10) is detected
The performance signals of the described accessory controller that the make-and-break signal of cable and described signal imitation modulate circuit (20) detect；
Described master controller (50), is used for receiving, analyze and process the described adnexa control that described signal acquisition circuit (40) gathers
The make-and-break signal of cable processed and the performance signals of described accessory controller and described Insulation test modulate circuit (30) detect
Described adnexa controls the insulation resistance value signal of cable.
Outfield the most according to claim 1 fault detection and diagnosis equipment, it is characterised in that
Also include power supply modulate circuit (60), described power supply modulate circuit and described continuity test modulate circuit (10), described letter
Number simulated modulation circuit (20), described Insulation test modulate circuit (30), described signal acquisition circuit (40) and described main control
Device (50) is connected, for surveying for described continuity test modulate circuit (10), described signal imitation modulate circuit (20), described insulation
Examination modulate circuit (30), described signal acquisition circuit (40) and described master controller (50) provide running voltage and are described conducting
Test modulate circuit (10) provides pumping signal.
Outfield the most according to claim 2 fault detection and diagnosis equipment, it is characterised in that
Also include communication module (70), described communication module (70) and described master controller (50), described power supply modulate circuit
(60) it is connected with described Insulation test modulate circuit (30), for realizing mutually turning between RS232 signal and RS422 signal
Change.
Outfield the most according to claim 2 fault detection and diagnosis equipment, it is characterised in that
Also include man machine interface (80), described man machine interface (80) and described master controller (50) and described power supply modulate circuit
(60) it is connected, shows that described adnexa controls the on off operating mode of cable, described adnexa controls respectively for being switched by fault mode
The insulating resistance value of cable and the performance of described accessory controller.
Outfield the most according to claim 2 fault detection and diagnosis equipment, it is characterised in that
Described continuity test modulate circuit (10) includes pumping signal end points (11), more than two measured signal end points (12) and many
Road signal input unit (13),
Described pumping signal end points (11) is connected with described power supply modulate circuit (60), for controlling to two the above adnexaes
Cable sends pumping signal；
Described multiple signals input block (13) is connected, for undertaking two with two the above measured signal end points (12) respectively
The described pumping signal that the above adnexa of bar control cable flows through controls cables to detect two the above adnexaes simultaneously
Break-make.
Outfield the most according to claim 5 fault detection and diagnosis equipment, it is characterised in that
Described continuity test modulate circuit (10) also includes backflow protection unit (14), flow-restriction (15) and power supply indicating member
(16),
Described backflow protection unit (14) is connected to described measured signal end points (12) and described multiple signals input block (13)
Between, for preventing from flowing through the electric current adverse current of described adnexa control cable；
Described power supply indicating member (16) is connected with described power supply modulate circuit (60), is used for showing power work state；Described
Flow-restriction (15) is connected with described power supply indicating member (16), for described power supply indicating member (16) is carried out current limliting guarantor
Protect.
Outfield the most according to claim 6 fault detection and diagnosis equipment, it is characterised in that
Described continuity test modulate circuit (10) also includes self-test unit (17), described self-test unit (17) and described master controller
(50) it is connected, controls to realize the hard of described continuity test modulate circuit (10) for the break-make according to described master controller (50)
Part self-inspection.
Outfield the most according to claim 7 fault detection and diagnosis equipment, it is characterised in that
Described multiple signals input block (13) is and door that described self-test unit (17) is relay.
Outfield the most according to claim 5 fault detection and diagnosis equipment, it is characterised in that
Described Insulation test modulate circuit (30) includes stimulating module (31) and insulation resistance computing module (32),
Described stimulating module (31) is connected with described power supply modulate circuit (60), for described power supply modulate circuit (60) being provided
Power supply carry out boosting process after be converted into test voltage；
Described insulation resistance computing module (32) is connected with described stimulating module (31), for being changed by described stimulating module (31)
Test voltage be applied to described adnexa and control to control the insulating resistance value of cable calculating described adnexa on cable.
Outfield the most according to claim 9 fault detection and diagnosis equipment, it is characterised in that
Described insulation resistance computing module (32) include bridge detection circuit (321), transport and placing device (322), a/d converter (323) and
Controller (324), described bridge detection circuit (321), transport and placing device (322), a/d converter (323) and controller (324) are successively
Sequentially contact,
Described bridge detection circuit (321), is formed brachium pontis by four resistance, and described brachium pontis includes at the first diagonal angle and with described
At the second diagonal angle being oppositely arranged at pair of horns, wherein, an arm open circuit in described brachium pontis, it is used for accessing described adnexa and controls
Cable；
Described transport and placing device (322), at the first transport and placing device and the second transport and placing device, described first transport and placing device and described first diagonal angle
Being connected, described second transport and placing device is connected at described second diagonal angle, for being respectively connected to and amplifying the electricity at described first diagonal angle
Magnitude of voltage at pressure value and described second diagonal angle；
Described a/d converter (323), magnitude of voltage at described first diagonal angle that described transport and placing device (322) is amplified and described
Magnitude of voltage at second diagonal angle carries out analog digital conversion；
Described controller (324), to the magnitude of voltage at described first diagonal angle of analog digital conversion and described second diagonal angle
Magnitude of voltage carries out calculating to draw the insulating resistance value that described adnexa controls cable.
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| Publication number | Publication date |
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| CN106093676B (en) | 2018-11-16 |
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Address after: 412002 Dong Jiaduan, Zhuzhou, Hunan Patentee after: China Hangfa South Industrial Co. Ltd. Address before: 412002 Dong Jiaduan, Zhuzhou, Hunan Patentee before: China Southern Airlines Industry (Group) Co., Ltd. |