CN106093676B - Outfield fault detection and diagnosis equipment - Google Patents

Outfield fault detection and diagnosis equipment Download PDF

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Publication number
CN106093676B
CN106093676B CN201610397055.XA CN201610397055A CN106093676B CN 106093676 B CN106093676 B CN 106093676B CN 201610397055 A CN201610397055 A CN 201610397055A CN 106093676 B CN106093676 B CN 106093676B
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Prior art keywords
conditioning circuit
signal
circuit
test
detection
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CN106093676A (en
Inventor
李鼎文
李瑞涵
晋红
薛晓波
桂晓玉
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AECC South Industry Co Ltd
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China National South Aviation Industry Co Ltd
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/50Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
    • G01R31/58Testing of lines, cables or conductors
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R27/00Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
    • G01R27/02Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
    • G01R27/14Measuring resistance by measuring current or voltage obtained from a reference source
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/12Testing 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
    • G01R31/1227Testing 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
    • G01R31/1263Testing 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
    • G01R31/1272Testing 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
    • GPHYSICS
    • G05CONTROLLING; REGULATING
    • G05BCONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B23/00Testing or monitoring of control systems or parts thereof
    • G05B23/02Electric testing or monitoring
    • G05B23/0205Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults
    • G05B23/0208Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults characterized by the configuration of the monitoring system
    • G05B23/0213Modular 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 conditioning circuit, signal imitation conditioning circuit, Insulation test conditioning circuit, signal acquisition circuit and master controller, continuity test conditioning circuit, the on off operating mode for detection accessory control cable;Signal imitation conditioning circuit, the performance for detection accessory controller;Insulation test conditioning circuit, the insulating resistance value for detection accessory control cable;Signal acquisition circuit, for acquiring the performance signals of the on-off signal of the attachment control cable of continuity test conditioning circuit detection and the accessory controller of signal imitation conditioning circuit detection;Master controller, the insulation resistance value signal of the attachment control cable of performance signals and Insulation test the conditioning circuit detection of the on-off signal and accessory controller of the attachment control cable for receiving, analyzing and handling signal acquisition circuit acquisition.Detection accuracy of the present invention is high, diagnosis speed is fast, maintainable high.

Description

Outfield fault detection and diagnosis equipment
Technical field
The present invention relates to aero-engine detection fields, particularly, are related to a kind of outfield fault detection and diagnosis equipment.
Background technique
In aero-engine field, as novel efficient, high-power engine are continuously updated the replacement, engine control System is more and more accurate, also higher and higher to requirements such as the safety of aircraft engine accessory, reliability and maintenanceabilities.But In the prior art, the flight-line service process of the control cable and controller of aircraft engine accessory (such as auxiliary power unit) In be frequently encountered following problem:
A) aircraft needs scramble when executing task, can not quickly, accurately to the control cable of aircraft engine accessory Testing and evaluation is carried out with the performance and function of controller;
B) the control cable of aircraft engine accessory and controller in the service life of outfield can not periodic detection and assessment, Producer's detection need to be returned, a large amount of manpower and material resources are wasted;
C) when) the control cable of aircraft engine accessory and controller break down, quickly and accurately it can not detect and examine Disconnected failure, isolates fault point, can only remove control cable or controller returns producer, or producer messenger is required to carry out troubleshooting.
Therefore, the control cable of existing aircraft engine accessory and the outer field detecting difference and maintainability of controller are low, It is a urgent problem to be solved.
Summary of the invention
The present invention provides a kind of outfield fault detection and diagnosis equipment, to solve the control of existing aircraft engine accessory The low technical problem of the outer field detecting difference and maintainability of cable and controller.
The technical solution adopted by the present invention is as follows:
The present invention provides a kind of outfield fault detection and diagnosis equipment, is used for detection and diagnosis aircraft engine accessory to be measured, Aircraft engine accessory to be measured includes attachment control cable and accessory controller, and outfield fault detection and diagnosis equipment includes that conducting is surveyed Try conditioning circuit, signal imitation conditioning circuit, Insulation test conditioning circuit, signal acquisition circuit and master controller, continuity test Conditioning circuit and signal imitation conditioning circuit are connected with signal acquisition circuit respectively, Insulation test conditioning circuit and signal acquisition electricity Road is connected with master controller respectively,
Continuity test conditioning circuit is led to for issuing pumping signal to attachment control cable with detection accessory control cable Disconnected state;
Signal imitation conditioning circuit, the working signal for simulating aircraft engine accessory to be measured drive accessory controller work Make with the performance of detection accessory controller;
Insulation test conditioning circuit, for applying test voltage to attachment control cable with the exhausted of detection accessory control cable Edge resistance value;
Signal acquisition circuit, the on-off signal and letter of the attachment control cable for acquiring the detection of continuity test conditioning circuit The performance signals of the accessory controller of number simulated modulation circuit detection;
Master controller, the on-off signal of the attachment control cable for receiving, analyzing and handling signal acquisition circuit acquisition The insulation resistance value signal of the attachment control cable detected with the performance signals and Insulation test conditioning circuit of accessory controller.
Further, outfield fault detection and diagnosis equipment, further includes power supply conditioning circuit, and power supply conditioning circuit and conducting are surveyed Examination conditioning circuit, signal imitation conditioning circuit, Insulation test conditioning circuit, signal acquisition circuit are connected with master controller, are used for It is mentioned for continuity test conditioning circuit, signal imitation conditioning circuit, Insulation test conditioning circuit, signal acquisition circuit and master controller Pumping signal is provided for operating voltage and for continuity test conditioning circuit.
Further, outfield fault detection and diagnosis equipment further includes communication module, communication module and master controller, power supply Conditioning circuit is connected with Insulation test conditioning circuit, for realizing the mutual conversion between RS232 signal and RS422 signal.
Further, outfield fault detection and diagnosis equipment further includes man-machine interface, man-machine interface and master controller and power supply Conditioning circuit is connected, for by fault mode switching respectively the display attachment control on off operating mode of cable, insulating resistance value with And the performance of accessory controller.
Further, continuity test conditioning circuit includes pumping signal endpoint, two or more measured signal endpoint and multichannels Signal input unit,
Pumping signal endpoint is connected with power supply conditioning circuit, for issuing excitation letter to two or more attachment control cables Number;
Multiple signals input unit is connected with two or more measured signal endpoints respectively, for accepting two or more attachment controls The pumping signal that cable processed flows through with and meanwhile two or more attachmentes control cables of detection on-off.
Further, continuity test conditioning circuit further includes backflow protection unit, current limiting unit and power supply instruction unit,
Backflow protection unit is connected between measured signal endpoint and multiple signals input unit, flows through attachment for preventing Control the electric current adverse current of cable;
Power supply instruction unit is connected with power supply conditioning circuit, for showing power work state;Current limiting unit refers to power supply Show that unit is connected, for carrying out current-limiting protection to power supply instruction unit.
Further, continuity test conditioning circuit further includes self-test unit, and self-test unit is connected with master controller, is used for root The hardware check of the continuity test conditioning circuit is realized according to the on-off control of master controller.
Further, multiple signals input unit be with door, self-test unit is relay.
Further, Insulation test conditioning circuit includes excitation module and insulation resistance computing module,
Excitation module is connected with power supply conditioning circuit, and the power supply for providing power supply conditioning circuit carries out at boosting Test voltage is converted into after reason;
Insulation resistance computing module is connected with excitation module, and the test voltage for converting excitation module is applied to attachment The insulating resistance value of attachment control cable is calculated on control cable.
Further, insulation resistance computing module includes bridge detection circuit, transport and placing device, AD converter and controller, bridge Formula detection circuit, transport and placing device, AD converter and controller are successively sequentially contacted,
Bridge detection circuit forms bridge arm by four resistance, and bridge arm includes the first diagonal angle and opposite with the first diagonal angle The second diagonal angle being arranged, wherein the arm open circuit in bridge arm, for accessing attachment control cable;
Transport and placing device, including the first transport and placing device and the second transport and placing device, the first transport and placing device are connected with the first diagonal angle, the second amplifier Device is connected with the second diagonal angle, for being respectively connected to and amplifying the voltage value of the first diagonal angle and the voltage value of the second diagonal angle;
AD converter, the voltage value of the first diagonal angle for amplifying to transport and placing device and the voltage value of the second diagonal angle carry out Analog-to-digital conversion;
Controller is calculated for the voltage value of the first diagonal angle to analog-to-digital conversion and the voltage value of the second diagonal angle To obtain the insulating resistance value of attachment control cable.
The invention has the advantages that:
Fault detection and diagnosis equipment in outfield provided by the invention improves electricity using continuity test conditioning circuit, Insulation test The on off operating mode and insulating resistance value and accessory controller of road and signal imitation conditioning circuit difference detection accessory control cable Performance.In outfield or army's use process, fast automatic detecting, fault location can be carried out to engine accessory power rating and is divided Analysis, especially during fighting or carrying out an urgent task, the technology application can greatly save each attachment of engine maintenance, Maintenance time wins more valuable times to fight or carrying out an urgent task.Detection accuracy of the present invention is high, diagnosis speed is fast, It is maintainable high.
Other than objects, features and advantages described above, there are also other objects, features and advantages by the present invention. Below with reference to figure, the present invention is described in further detail.
Detailed description of the invention
The attached drawing constituted part of this application is used to provide further understanding of the present invention, schematic reality of the invention It applies example and its explanation is used to explain the present invention, do not constitute improper limitations of the present invention.In the accompanying drawings:
Fig. 1 is the functional block diagram of fault detection and diagnosis equipment first embodiment in outfield of the present invention;
Fig. 2 is the functional block diagram of fault detection and diagnosis equipment second embodiment in outfield of the present invention;
Fig. 3 is the functional block diagram of fault detection and diagnosis equipment 3rd embodiment in outfield of the present invention;
Fig. 4 is the circuit diagram of one preferred embodiment of communication module in Fig. 3;
Fig. 5 is the circuit diagram of one preferred embodiment of continuity test conditioning circuit in Fig. 1;
Fig. 6 is the circuit diagram of one preferred embodiment of Insulation test conditioning circuit in Fig. 1.
Attached drawing marks explanation:
10, continuity test conditioning circuit;20, signal imitation conditioning circuit;30, Insulation test conditioning circuit;40, signal is adopted Collector;50, master controller;60, power supply conditioning circuit;70, communication module;71, RS422 communication IC;72, communication turns Change circuit;73, RS232 communication IC;80, man-machine interface;11, pumping signal endpoint;12, measured signal endpoint;13, more Road signal input unit;14, backflow protection unit;15, current limiting unit;16, power supply instruction unit;17, self-test unit;31, swash Encourage module;32, insulation resistance computing module;321, bridge detection circuit;322, transport and placing device;323, AD converter;324, it controls Device.
Specific embodiment
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase Mutually combination.The present invention will be described in detail below with reference to the accompanying drawings and embodiments.
Referring to Fig.1, the preferred embodiment of the present invention provides a kind of outfield fault detection and diagnosis equipment, for detecting and examining Break aircraft engine accessory to be measured, and aircraft engine accessory to be measured includes attachment control cable and accessory controller, outfield failure Checkout and diagnosis equipment includes continuity test conditioning circuit 10, signal imitation conditioning circuit 20, Insulation test conditioning circuit 30, signal Acquisition Circuit 40 and master controller 50, continuity test conditioning circuit 10 and signal imitation conditioning circuit 20 and signal acquisition circuit 40 It is connected, Insulation test conditioning circuit 30 and signal acquisition circuit 40 are connected with master controller 50, continuity test conditioning circuit 10, use In the on off operating mode for controlling attachment control cable sending pumping signal cable with detection accessory;Signal imitation conditioning circuit 20, Working signal for simulating aircraft engine accessory to be measured drives accessory controller to work with the performance of detection accessory controller; Insulation test conditioning circuit 30, for applying test voltage to attachment control cable with the insulation resistance of detection accessory control cable Value;Signal acquisition circuit 40, the on-off signal and letter of the attachment control cable for acquiring the detection of continuity test conditioning circuit 10 The performance signals for the accessory controller that number simulated modulation circuit 20 detects;Master controller 50, for receiving, analyzing and handling signal Performance signals and the Insulation test conditioning of the on-off signal and accessory controller of the attachment control cable that Acquisition Circuit 40 acquires The insulation resistance value signal for the attachment control cable that circuit 30 detects.Specifically, master controller 50 is analyzed for signal, is handled, The operating mode for specifying each module is communicated by RS232 and receives information and send instruction, set bounds control algorithm, presets event Barrier mode completes fault detection, positioning and diagnosis.
Fault detection and diagnosis equipment in outfield provided in this embodiment is improved using continuity test conditioning circuit, Insulation test The on off operating mode and insulating resistance value of circuit and signal imitation conditioning circuit difference detection accessory control cable and attachment control The performance of device.In outfield or army's use process, fast automatic detecting, fault location can be carried out to engine accessory power rating and is divided Analysis, especially during fighting or carrying out an urgent task, the technology application can greatly save each attachment of engine maintenance, Maintenance time wins more valuable times to fight or carrying out an urgent task.The present embodiment detection accuracy is high, diagnoses speed Fastly, maintainable high.
Preferably, fault detection and diagnosis equipment in outfield provided in this embodiment further includes power supply conditioning circuit 60, power supply tune Manage circuit and continuity test conditioning circuit 10, signal imitation conditioning circuit 20, Insulation test conditioning circuit 30, signal acquisition circuit 40 are connected with master controller 50, for improving electricity for continuity test conditioning circuit 10, signal imitation conditioning circuit 20, Insulation test Road 30, signal acquisition circuit 40 and master controller 50 provide operating voltage and provide excitation letter for continuity test conditioning circuit 10 Number.
Fault detection and diagnosis equipment in outfield provided in this embodiment, using power supply conditioning circuit, only outfield failure is not examined The each circuit for surveying diagnostic device provides operating voltage, and provides pumping signal for continuity test conditioning circuit, thus significantly Improve the effective rate of utilization of power supply conditioning circuit.
Preferably, as shown in figure 3, fault detection and diagnosis equipment in outfield provided in this embodiment, further includes communication module 70, Communication module 70 is connected with master controller 50, power supply conditioning circuit 60 and Insulation test conditioning circuit 30, for realizing RS232 letter Mutual conversion number between RS422 signal.Specifically, referring to 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 conditioning circuit 30 and RS232 Communication IC 73 be connected, RS232 communication IC 73 is connected with master controller 50, RS422 communication IC 71 and External circuits are connected with RS422 communication IC 71.What Insulation test conditioning circuit 30 detected is not attached to exhausted between two o'clock Edge performance is sent to master in the form of RS232 communication the conversion of communication switching circuit 72 and RS232 communication IC 73 Controller 50.
Fault detection and diagnosis equipment in outfield provided in this embodiment is converted to RS422 communication by communication module 70 RS232 communication makes outfield fault detection and diagnosis equipment have more flexibilities and wider array of adaptation to expand use scope Property.
Preferably, as shown in figure 3, fault detection and diagnosis equipment in outfield provided in this embodiment, further includes man-machine interface 80, Man-machine interface 80 is connected with master controller 50 and power supply conditioning circuit 60, for switching display attachment control respectively by fault mode The on off operating mode and insulating resistance value of cable processed and the performance of accessory controller.
Fault detection and diagnosis equipment in outfield provided in this embodiment directly displays attachment by man-machine interface and controls cable The performance of on off operating mode and insulating resistance value and accessory controller, it is more intuitive to the display of failure, substantially increase user Operation ease.
Preferably, as shown in figure 5, fault detection and diagnosis equipment in outfield provided in this embodiment, continuity test conditioning circuit 10 include pumping signal endpoint 11, two or more measured signal endpoints 12, multiple signals input unit 13, backflow protection unit 14, current limiting unit 15 and power supply instruction unit 16 and self-test unit 17, pumping signal endpoint 11 are connected with power supply conditioning circuit 60, For issuing pumping signal to two or more attachment control cables;Multiple signals input unit 13 is tested letter with two or more respectively Number endpoint 12 is connected, for accepts the pumping signal that two or more attachmentes control cables flow through with and meanwhile detect two or more attachmentes Control the on-off of cable.Backflow protection unit 14 is connected between measured signal endpoint 12 and multiple signals input unit 13, is used In the electric current adverse current for preventing from flowing through attachment control cable;Power supply instruction unit 16 is connected with power supply conditioning circuit 60, for showing Power work state;Current limiting unit 15 is connected with power supply instruction unit 16, for carrying out current-limiting protection to power supply instruction unit 16. Continuity test conditioning circuit 10 further includes self-test unit 17, and self-test unit 17 is connected with master controller 50, for according to main control The on-off of device 50 controls the hardware check to realize continuity test conditioning circuit 10.Specifically, referring to Fig. 5, with single group multi input For signal, current limiting unit 15 includes first diode D1, the second diode D2, third diode D3, the 4th diode D4, the Five diode D5 and the 6th diode D6, each diode is connected with corresponding measured signal endpoint 12, for preventing electric current inverse Stream.Power supply instruction unit 16 is light emitting diode D7, and light emitting diode D7 is connected with power supply, for showing that power work state is It is no normal.Current limiting unit 15 includes the first current-limiting resistance R1, the second current-limiting resistance R2, third current-limiting resistance R3 and the 4th current limliting electricity R4 is hindered, one end of single current-limiting resistance is connected with the cathode of single diode respectively, the other end of single current-limiting resistance Ground connection.Multiple signals input unit 13 is multi input and door N1, for improving the efficiency of I/O signal acquisition, isolation input output Signal.Self-test unit 17 is relay K, controls its on-off by master controller 50, and the hardware for continuity test conditioning circuit is certainly Inspection.Continuity test conditioning circuit single group circuit as more than ten roads to tens tunnels forms, and is issued by power supply conditioning circuit 60 Voltage value as pumping signal, it can be achieved that road measured signal up to a hundred return survey.
Fault detection and diagnosis equipment in outfield provided in this embodiment can realize road quilts up to a hundred by continuity test conditioning circuit It surveys returning for signal to survey, to substantially increase the efficiency of detection, is conducive to rapidly removing faults.
Fault detection and diagnosis equipment in outfield provided in this embodiment, signal imitation conditioning circuit be by simple sinusoidal signal, Square-wave signal is filtered, converts, improve at the consistent frequency signal of engine rotational speed signal (0Hz~8000Hz, precision ± 2Hz);It is converted by voltage, simulates the signals such as thermocouple signal, lubricating oil pressure signal.Concrete signal simulation is as follows:
A) simulation input is converted:(0~45) mV turns (0~10) V, and (0~170) mA turns (0~10) V, and (0~5.5) V turns (0 ~10) V, (0~4.3) V turn (0~10) V, precision ± 20mV;
B) simulation output is converted:(- 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 inputs:(0~8000) ± 1Hz square wave input;
E) On-off signal is converted:Ground/vacantly turn TTL, 27V/ vacantly turns TTL, and ground/5V turns TTL;
F) output switch parameter is converted:TTL turns of ground/hanging (5V/, optocoupler), it is hanging that TTL turns 27V/.
Fault detection and diagnosis equipment in outfield provided in this embodiment, signal acquisition circuit part are realized using wide warm board:
A) 16 tunnel analog signals input, (channel A/D), 16bits, input range:0-10V;
B) 2 road analog signal outputs (channel D/A), 16bits, output area:0-10V;
C) 96 railway digital I/O signal realizes the input of Transistor-Transistor Logic level signal, output;
D) built-in calculator/timer.
Preferably, as shown in fig. 6, fault detection and diagnosis equipment in outfield provided in this embodiment, Insulation test conditioning circuit 30 include excitation module 31 and insulation resistance computing module 32, excitation module 31 and power supply conditioning circuit 60, are used for power supply tune The power supply that reason circuit 60 provides is converted into test voltage after carrying out boosting processing;Insulation resistance computing module 32 and excited modes Block 31 is connected, and the test voltage for converting excitation module 31 is applied on attachment control cable to calculate attachment 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, AD converter 323 and controller 324 are successively sequentially gone here and there Even, bridge detection circuit 321 form bridge arm by four resistance, and bridge arm is including the first diagonal angle and opposite with the first diagonal angle sets The second diagonal angle set, wherein the arm open circuit in bridge arm, for accessing attachment control cable;Transport and placing device 322, including the One transport and placing device and the second transport and placing device, the first transport and placing device are connected with the first diagonal angle, and the second transport and placing device is connected with the second diagonal angle, use In being respectively connected to and amplify the voltage value of the first diagonal angle and the voltage value of the second diagonal angle;AD converter 323, for amplifier The voltage value for the first diagonal angle that device 322 amplifies and the voltage value of the second diagonal angle carry out analog-to-digital conversion;Controller 324, is used for The voltage value of voltage value and the second diagonal angle to the first diagonal angle of analog-to-digital conversion is calculated to show that attachment controls cable Insulating resistance value.Excitation module 31 is transformer, and the input terminal of transformer is connected with power supply, the output end of transformer and 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 One end of 8th resistance R10, bridge detection circuit 321 are connected with excitation module 31, and the other end of bridge detection circuit 321 is divided to two Road is grounded by the 5th resistance R7 and the 7th resistance R9 all the way, and another way is grounded by the 6th resistance R8 and the 8th resistance R10.
The working principle of Insulation test conditioning circuit 30 is as follows:
As shown in fig. 6,28V dc voltage boost is 500V VDCT volts ,direct-current ,test by transformer, and by 500V DC test Excitation of the voltage as Insulation test conditioning circuit 30, for detecting the insulation performance being not attached between two o'clock, and passes through RS232 Whether Communication Control carries out testing and measured insulating resistance value is sent to master controller 50 in the form that RS232 is communicated, Every 500ms updates primary transmission data when being tested, and receives after master controller 50 stops the RS232 communication instruction tested and stops It only tests, and simultaneously closes off 500V VDCT volts ,direct-current ,test.Insulation resistance measurement circuit uses leakage current test method, by additional straight Flow the insulation resistance of voltage measurement parasitic loop (measurand).Referring to Fig. 3,28V DC voltage is by transformer boosting 500V VDCT volts ,direct-current ,test (test voltage), Rx are insulation resistance to be measured, and R7, R8, R9 and R10 are respectively known standard partial pressure And current-limiting resistance, after insulation voltage is added in Insulation test conditioning circuit 30, it is assumed that the voltage value of VDCT volts ,direct-current ,test is U, R7 Voltage value between R9 is U0, and the voltage value between R8 and R10 is U1, according to whole circuit law of ohm:
Simultaneous above formula (1)~(3), can obtain insulation resistance Rx is:
Wherein, the U0 in formula (4) and U1 is the voltage value calculated by single-chip microcontroller, has thus been calculated absolutely Edge resistance Rx.In addition, the Insulation test conditioning circuit 30 has a biggest advantage, it belongs to bridge circuit, can be very good Eliminate added insulation voltage bring unstable factor.
Fault detection and diagnosis equipment in outfield provided in this embodiment has broken previous outfield and has ensured apparatus insulated and conducting inspection The discrete and not integrated situation of brake has pushed outfield to ensure that equipment in the development in Intelligent fault diagnostic techniques field, promotees Device-General, seriation development are ensured into outfield.Fault detection and diagnosis equipment in outfield provided in this embodiment, according to outfield Service condition realizes the key operation of user, highly shortened the testing time and improves the accuracy of test, has filled up outer Field ensures the blank of online real-time in-situ detection technique in equipment, and reaches domestically leading level.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.

Claims (9)

1. a kind of outfield fault detection and diagnosis equipment is used for detection and diagnosis aircraft engine accessory to be measured, the aviation to be measured Engine accessory power rating includes attachment control cable and accessory controller, which is characterized in that the outfield fault detection and diagnosis equipment packet Include continuity test conditioning circuit (10), signal imitation conditioning circuit (20), Insulation test conditioning circuit (30), signal acquisition circuit (40) and master controller (50), the continuity test conditioning circuit (10) and the signal imitation conditioning circuit (20) respectively with institute Signal acquisition circuit (40) are stated to be connected, the Insulation test conditioning circuit (30) and the signal acquisition circuit (40) respectively with The master controller (50) is connected,
The continuity test conditioning circuit (10), for issuing pumping signal to attachment control cable to detect the attachment Control the on off operating mode of cable;
The signal imitation conditioning circuit (20), the working signal for simulating aircraft engine accessory to be measured drive the attachment Controller works to detect the performance of the accessory controller;
The Insulation test conditioning circuit (30), for applying test voltage to attachment control cable to detect the attachment Control the insulating resistance value of cable;
The signal acquisition circuit (40), for acquiring the attachment control electricity of continuity test conditioning circuit (10) detection The performance signals of the on-off signal of cable and the accessory controller of the signal imitation conditioning circuit (20) detection;
The master controller (50), for receiving, analyzing and handling the attachment control of the signal acquisition circuit (40) acquisition The detection of the performance signals and the Insulation test conditioning circuit (30) of the on-off signal of cable processed and the accessory controller The insulation resistance value signal of the attachment control cable;
It further include power supply conditioning circuit (60), the power supply conditioning circuit and the continuity test conditioning circuit (10), the letter Number simulated modulation circuit (20), the Insulation test conditioning circuit (30), the signal acquisition circuit (40) and the main control Device (50) is connected, for surveying for the continuity test conditioning circuit (10), the signal imitation conditioning circuit (20), the insulation Conditioning circuit (30), the signal acquisition circuit (40) and the master controller (50) is tried operating voltage is provided and is the conducting It tests conditioning circuit (10) and pumping signal is provided.
2. fault detection and diagnosis equipment in outfield according to claim 1, which is characterized in that
It further include communication module (70), the communication module (70) and the master controller (50), the power supply conditioning circuit (60) it is connected with the Insulation test conditioning circuit (30), for realizing mutually turning between RS232 signal and RS422 signal It changes.
3. fault detection and diagnosis equipment in outfield according to claim 1, which is characterized in that
It further include man-machine interface (80), the man-machine interface (80) and the master controller (50) and the power supply conditioning circuit (60) it is connected, for showing that the attachment controls the on off operating mode of cable, the attachment controls respectively by fault mode switching The performance of the insulating resistance value of cable and the accessory controller.
4. fault detection and diagnosis equipment in outfield according to claim 1, which is characterized in that
The continuity test conditioning circuit (10) include pumping signal endpoint (11), two or more measured signal endpoints (12) and Multiple signals input unit (13),
The pumping signal endpoint (11) is connected with the power supply conditioning circuit (60), for controlling to two attachmentes described above Cable issues pumping signal;
The multiple signals input unit (13) is connected with two measured signal endpoints (12) described above respectively, for accepting two Item the above attachment pumping signal for flowing through of control cable controls cables to detect two attachmentes described above simultaneously On-off.
5. fault detection and diagnosis equipment in outfield according to claim 4, which is characterized in that
The continuity test conditioning circuit (10) further includes backflow protection unit (14), current limiting unit (15) and power supply instruction unit (16),
The backflow protection unit (14) is connected to the measured signal endpoint (12) and the multiple signals input unit (13) Between, for preventing from flowing through the electric current adverse current of the attachment control cable;
The power supply instruction unit (16) is connected with the power supply conditioning circuit (60), for showing power work state;It is described Current limiting unit (15) is connected with the power supply instruction unit (16), for carrying out current limliting guarantor to the power supply instruction unit (16) Shield.
6. fault detection and diagnosis equipment in outfield according to claim 5, which is characterized in that
The continuity test conditioning circuit (10) further includes self-test unit (17), the self-test unit (17) and the master controller (50) it is connected, for being controlled according to the on-off of the master controller (50) to realize the hard of the continuity test conditioning circuit (10) Part self-test.
7. fault detection and diagnosis equipment in outfield according to claim 6, which is characterized in that
The multiple signals input unit (13) be with door, the self-test unit (17) be relay.
8. fault detection and diagnosis equipment in outfield according to claim 4, which is characterized in that
The Insulation test conditioning circuit (30) includes excitation module (31) and insulation resistance computing module (32),
The excitation module (31) is connected with the power supply conditioning circuit (60), for providing the power supply conditioning circuit (60) Power supply carry out boosting processing after be converted into test voltage;
The insulation resistance computing module (32) is connected with the excitation module (31), for converting the excitation module (31) Test voltage be applied to the insulating resistance value that the attachment control cable is calculated on attachment control cable.
9. fault detection and diagnosis equipment in outfield according to claim 8, which is characterized in that
The insulation resistance computing module (32) include bridge detection circuit (321), transport and placing device (322), AD converter (323) and Controller (324), the bridge detection circuit (321), transport and placing device (322), AD converter (323) and controller (324) are successively Sequentially contact,
The bridge detection circuit (321) forms bridge arm by four resistance, and the bridge arm includes the first diagonal angle and with described the The second diagonal angle being oppositely arranged at pair of horns, wherein the arm open circuit in the bridge arm, for accessing the attachment control Cable;
The transport and placing device (322), including the first transport and placing device and the second transport and placing device, first transport and placing device and first diagonal angle It is connected, second transport and placing device is connected with second diagonal angle, for being respectively connected to and amplifying the electricity of first diagonal angle The voltage value of pressure value and second diagonal angle;
The AD converter (323), the voltage value of first diagonal angle for amplifying to the transport and placing device (322) and described The voltage value of second diagonal angle carries out analog-to-digital conversion;
The controller (324), voltage value and second diagonal angle for first diagonal angle to analog-to-digital conversion Voltage value is calculated the insulating resistance value to obtain the attachment control cable.
CN201610397055.XA 2016-06-07 2016-06-07 Outfield fault detection and diagnosis equipment Active CN106093676B (en)

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