CN107566829A - Fault detection system - Google Patents
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- CN107566829A CN107566829A CN201710854452.XA CN201710854452A CN107566829A CN 107566829 A CN107566829 A CN 107566829A CN 201710854452 A CN201710854452 A CN 201710854452A CN 107566829 A CN107566829 A CN 107566829A
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- Testing Electric Properties And Detecting Electric Faults (AREA)
Abstract
The invention provides a fault detection system which comprises a tooling plate, a master control device and a first connector, wherein a second connector in the tooling plate is connected with equipment to be detected; the signal generator in the master control device is connected with the first connector, when testing is needed, the first connector is controlled to be in butt joint with the second connector, and the signal processing module can inform the signal generating unit to send the audio and video signals to the equipment to be tested to test. According to the invention, each worker is not required to wire and remove wires, and the wires can be connected before the equipment to be tested enters the production line to flow, the operation of the production line is not influenced in the wire connection process, the manual participation is not required in the test process, the stability of the operation of the production line is improved, and the detection efficiency and accuracy are greatly improved.
Description
Technical field
The present invention relates to equipment testing field, more particularly to a kind of fault detection system.
Background technology
The production assembling generally use pipelined operation method of television set complete machine at present.According to process sequence on streamline
It is provided with the assembly station of various parts, the debugging detection station of each project and mechanic position etc..Producing line drives working plate
Carry television set and reach the corresponding process of each station execution.Operation in detection station is usually corresponding entry on television set
Purpose detection line is inserted into the interface of affiliated detection device, then detected using the method for manual control, and needs worker
Television set passage is switched by remote control, television set VGA passage pictures is visually observed and displays whether normally.But artificial detection is held
The problems such as missing inspection easily occur or judging error, efficiency is low.
The content of the invention
The present invention provides a kind of fault detection system, when being tested with overcoming using traditional working plate device under test,
The problem of worker of each detection station is required to wiring and taken out stitches so as to influence testing efficiency.
Specifically, the present invention is achieved through the following technical solutions：
A kind of fault detection system, including：Working plate, master control device and the first connector；The working plate includes substrate
And the support and the second connector of setting on the substrate, the support are used to Devices to test being fixed on working plate,
Second connector is connected with Devices to test；
The master control device includes：Signal processing module, signal generator and signal acquisition module；The signal generator
It is connected with first connector, and controls first connector to be docked with second connector；
The signal processing module controls the signal generator to send audio-video signal to Devices to test；
The signal acquisition module is used to gather the information exported after the Devices to test processing audio-video signal, and
The information of collection is sent to signal processing module；
The signal processing module, it is additionally operable to judge whether the function of Devices to test is normal according to the information of collection.
In one embodiment, the information of Devices to test output includes：Image and/or audio；The signal acquisition module bag
Include：Image acquisition units and audio collection unit；
Described image collecting unit, for gathering the image of Devices to test output；
The audio collection unit, for gathering the audio of Devices to test output.
In one embodiment, described image collecting unit is camera or camera；The audio collection unit is microphone.
In one embodiment, the working plate includes：Radio-frequency identification card, for storing the identity information of the working plate
And/or the identity information of Devices to test；
The master control device includes：The radio-frequency readers being connected with signal processing module；
The radio-frequency readers, for reading the identity information and/or Devices to test of working plate from radio-frequency identification card
Identity information, and send to signal processing module；
The signal processing module, for testing result to be associated with the identity information of Devices to test.
In one embodiment, second connector has multiple docking points, and the port for needing to test in Devices to test is distinguished
Connected with corresponding docking point；
The docking point quantity and position correspondence in docking point and the first connector in second connector, in the second connector
Docking point be used for be connected with signal generator.
In one embodiment, first connector is docking male seat, and second connector is docking female seat.
In one embodiment, the fault detection system also includes：The drive device being connected with the first connector；
The signal processing module, for exporting docking instruction before control signal is sent to drive device；
The drive device, for instructing the first connector of control to be docked with the second connector according to docking.
In one embodiment, the drive device is pneumatic docking facilities.
In one embodiment, the master control device includes：The alarm module being connected with signal processing module；
When signal processing module judges the dysfunction of Devices to test, output prompt messages to alarm mould
Block；
The alarm module sends sound and/or light alarm information according to prompt messages.
In one embodiment, the signal generator is connected with first connector by the signal wire with screen layer.
The fault detection system of the present invention includes working plate, master control device and the first connector, the second company in working plate
Device is connect to be connected with Devices to test；Signal generator in master control device is connected with the first connector, when needing to be tested, control
Make the first connector to dock with the second connector, signal processing module can be sent audio-video signal with notification signal generating unit
Tested to Devices to test.The present invention is without each worker's wiring and takes out stitches, and can enter producing line stream in Devices to test
Wiring before dynamic, wiring process do not influence producing line operating, and test process can improve the stabilization of producing line operation without manually participating in
Property, greatly improve the Efficiency and accuracy of detection.
Brief description of the drawings
Fig. 1 is a kind of logic diagram of fault detection system shown in an exemplary embodiment of the invention；
Fig. 2 is a kind of logic diagram of fault detection system shown in another exemplary embodiment of the present invention；
Fig. 3 is a kind of logic diagram of fault detection system shown in another exemplary embodiment of the present invention；
Fig. 4 is a kind of logic diagram of fault detection system shown in another exemplary embodiment of the present invention；
Fig. 5 is a kind of logic diagram of fault detection system shown in another exemplary embodiment of the present invention.
Embodiment
Here exemplary embodiment will be illustrated in detail, its example is illustrated in the accompanying drawings.Following description is related to
During accompanying drawing, unless otherwise indicated, the same numbers in different accompanying drawings represent same or analogous key element.Following exemplary embodiment
Described in embodiment do not represent and the consistent all embodiments of the present invention.On the contrary, they be only with it is such as appended
The example of the consistent apparatus and method of some aspects being described in detail in claims, of the invention.
It is only merely for the purpose of description specific embodiment in terminology used in the present invention, and is not intended to be limiting the present invention.
It is also intended in " one kind " of the singulative of the invention with used in appended claims, " described " and "the" including majority
Form, unless context clearly shows that other implications.It is also understood that term "and/or" used herein refers to and wrapped
Containing the associated list items purpose of one or more, any or all may be combined.
It will be appreciated that though various information, but this may be described using term first, second, third, etc. in the present invention
A little information should not necessarily be limited by these terms.These terms are only used for same type of information being distinguished from each other out.For example, do not departing from
In the case of the scope of the invention, the first information can also be referred to as the second information, and similarly, the second information can also be referred to as
One information.Depending on linguistic context, word as used in this " if " can be construed to " ... when " or " when ...
When " or " in response to determining ".
In production and test process, working plate can carry parts or equipment etc. on a production line and be assembled or be surveyed
Try (needing the hereinafter referred to as Devices to test tested) etc., modern automation streamline is normally set up Devices to test and reaches detection
A testing time fixed is stopped during station, producing line is flowed after the testing time, and the Devices to test of this detection station is brought into down
One detection station, one new Devices to test of transmission continue to test into this detection station.It is configured with detection station corresponding
Signal generator, worker will complete following operate within the testing time：The detection line of signal generator is inserted into be measured set one by one
Standby the corresponding interface, tested and remove detection line.But different worker's wiring is different with the speed taken out stitches, could not provide
When aforesaid operations are completed in the time, worker makes whole piece producing line shut down by stop button, until producing line after the completion of aforesaid operations
It is further continued for running.And when reaching each detection station, worker will connect many root detection lines substantially, it is clear that by wiring and take out stitches
The work manually participated in Deng needs is distributed to each station of producing line, significantly increases the risk of producing line pause operating, reduces
The stability of producing line operation.
Therefore, the present invention proposes a kind of fault detection system, as shown in figure 1, fault detection system 900 includes frock
Plate 100, the connector 400 of master control device 300 and first；The working plate 100 includes substrate 110 and is arranged on substrate 110
Second connector 120, of course, it is possible to which the guide groove bar and/or movable pulley that it is slided in producing line are easy in installation on substrate 110
(not shown) etc., wire and socket (not shown) etc. can be set to be powered for Devices to test 200 on substrate 110.
Devices to test 200 can be fixed on by support 130 on working plate 100, support 130 can be the clip for having positioning function
Or support etc., if support, then certain space can be retained between Devices to test 200 and substrate 110 other parts are set,
Increase the space availability ratio of working plate 100.Also include the second connector 120 in working plate 100, Devices to test 200 is fixed on
When on working plate 100, you can be connected Devices to test 200 with the second connector 120.
It can include in master control device 300：Signal processing module 320, signal generator 330 and signal acquisition module 310；
Signal generator 330 is connected with the first connector 400, is stored with the audio-video signal that device under test 200 is tested, and control
Make the first connector 400 to dock with the second connector 120, of course, it is possible to by signal be occurred by signal processing module 320
The control docking of device 330, it can also be connected by signal processing module 320 with the first connector 400 to control docking.
In test process, signal processing module 320 is used to send control signal, can be tested by artificial triggering, so as to control
After signal processing module 320 is sent control signal or the arrival specified location of working plate 100 by pre-defined rule successively,
Signal processing module 320 sends control signal successively by pre-defined rule automatically.Check mark processing module 320 of the present invention sends control letter
Number trigger condition be not construed as limiting.Signal generator 330 sends audio-video signal according to control signal to Devices to test 200；Treat
Measurement equipment 200 can export corresponding information after receiving audio-video signal and being handled, for example, audio amplifier is receiving audio frequency and video letter
Audio can be played after number, television set can play image and/or audio etc. after audio-video signal is received.Signal acquisition module
310, which can gather Devices to test 200, handles the information exported after audio-video signal, and the information of collection is sent to signal transacting
Module 320, signal processing module 320 judge whether the function of Devices to test 200 is normal according to the information of collection.Signal generator
112 can use the independent equipment such as television test signal generator, can also use the circuit board with the function, remove outer
Shell can save the space of the occupancy of signal generator 112, and the present invention is not construed as limiting to the concrete form of signal generator 112.
Signal generator 112 used in the present invention is directed to the equipment that Devices to test 200 sends signal used in test, and can be with
The signal generator 112 according to corresponding to being selected Devices to test 200, for example, when Devices to test 200 is television set, then the signal
Generator 112 can be television test signal generator, as a kind of instrument for producing television measuring signal, be produced by television system
Raw special test signal, as the signal source measured to television system or equipment, there is two class television measuring signals
Device, one kind is referred to as TV insertion trip signal generator, to produce based on special test signal；It is another kind of to be referred to as television measurement pattern
As generator, to produce based on special test image.Some television test signal generators are that two kinds of functions are incorporated in one
Rise.
Television test signal generator specially produces the test signal based on video line rate or field frequency, and test signal can
Be in Sine-squared ripple, staircase waveform, sawtooth waveforms, subcarrier modulation Sine-squared ripple and the subcarrier superposition ripple such as staircase waveform extremely
In the ripple such as one item missing or sawtooth waveforms, multiburst, black-to-white level alternating line frequency square wave, field-frequency square wave and shock wave extremely
One item missing.Correlation technique defines corresponding measurement index, such as signal to noise ratio, the differential gain, the differential phase, YC gain
Difference, delay inequality, luminance signal are non-linear, distortion of short duration, row time distortion, field time distortion, distortion of long duration, carrier chrominance signal
At least one of in the indexs such as distortion, amplitude versus frequency characte and time-frequency characteristic.Above-mentioned various waveform signals are sent into tested television system
Or after equipment, tested in video output terminals with the oscillograph of special test television-quality, you can it is special quantitatively to measure these
The index of door, determines system under test (SUT) or equipment quality.
TV insertion trip signal generator, which combines above-mentioned various special test signals, is inserted into TV signal
Field flyback in, above-mentioned measurement index can be monitored at any time while transmitting television signals, do not influence the normal biography of television image
It is defeated, it is easy to monitor television transmission quality in real time.Correlation technique defines the accurate location of insertion test row signal, China
Television system be in the row of the 17th, 18,330 and 331 4 insert standard test row signal.
Television measurement pattern as signal generator to produce the test image of standard, such as grid, dot matrix, gridiron pattern, gray scale
Bar, colour bar, multiburst and integration test image etc., the quality of television image can be more intuitively judged from these test images.
With the development of TV signal digitizing technique and mass storage, it is true that television pattern generator can supply a few frame standards
Real image, to more accurately comprehensive descision quality of TV image.
When Devices to test 200 is fixed on working plate 100 by the present invention, you can by the connector of Devices to test 200 and second
120 connections, in detection station, signal generator 330 is connected with the first connector 400, without increasing signal generator 330
Quantity is so as to reduce cost, and after the first connector 400 is docked with the second connector 120, you can device under test 200 is carried out
Test, without each worker's wiring and takes out stitches, and can enter wiring before producing line flows, wiring process in Devices to test 200
Producing line operating is not influenceed, and test process can improve the stability of producing line operation, greatly improve inspection without manually participating in
The Efficiency and accuracy of survey.
As it was previously stated, it is probably video pictures that Devices to test 200, which handles the information exported after audio-video signal, it is also possible to
Audio etc., when the information that Devices to test 200 exports includes image and audio, as shown in Fig. 2 can be in signal acquisition module
Image acquisition units 312 and audio collection unit 311 are set in 310；Devices to test 200 is gathered by image acquisition units 312
The image of output, the audio of the output of Devices to test 200 is gathered by audio collection unit 311.Image acquisition units 312 and audio
The information each gathered is sent to signal processing module 320 and analyzed by collecting unit 311, to judge Devices to test 200
Whether corresponding function is normal.Image acquisition units 312 can be camera or industrial camera etc., and audio collection unit 311 can
To be microphone etc., and audio collection unit 311 and image acquisition units 312 can be independent equipment, can also be with signal
Processing module 320 etc. is integrated in one, i.e. master control device 300 can be combined or an entirety by multiple devices
Equipment, such as industrial computer etc., the present invention is not construed as limiting to the form of master control device 300.Industrial camera is machine vision
A key component in system, its most essential function are exactly to convert optical signals into orderly electric signal.Selection is suitable
Camera is also the important step in Machine Vision System Design, and the selection of camera not only directly determines collected image resolution
Rate and picture quality etc., at the same it is also directly related with the operational mode of whole system.Industrial camera is commonly called as video camera again, compared to
For traditional civil camera (video camera), it has high picture steadiness, high-transmission ability and high anti-jamming capacity etc., city
Industrial camera is to be based on CCD (Charge Coupled Device) or CMOS (Complementary Metal mostly on face
Oxide Semiconductor) chip camera.CCD is the most commonly used imaging sensor of current machine vision.It collects photoelectricity
Conversion and charge storage, electric charge transfer and signal-obtaining are typical solid imaging devices in one.CCD outstanding feature is
Using electric charge as signal, and it is using electric current or voltage as signal different from other devices.This kind of image device is turned by photoelectricity
Change to form charge packet, then shifted in the presence of driving pulse and amplify output image signal.Typical CCD camera is by optics
Camera lens, sequential and synchronous generator, vertical driver and analog/digital signal process circuit composition.CCD is as a kind of work(
Energy device, compared with vacuum tube, have the advantages that nothing is burnt, without hysteresis, low voltage operating and low-power consumption.
In actual production process, factory can all detect to many platform Devices to tests 200 daily, be examined for the ease of arranging
Survey result and testing result is corresponded with Devices to test 200, as shown in figure 3, radio frequency can be set to know in working plate 100
Do not block 140.What radio-frequency identification card 140 utilized is REID, radio frequency identification, RFID (Radio Frequency
Identification) technology, also known as radio frequency identification, it is a kind of communication technology, can be identified by radio signals specific
Target simultaneously reads and writes related data, without establishing mechanical or optical contact between identifying system and specific objective.If radio frequency, one
As be microwave, 1-100GHz, identify and communicate suitable for short distance.Radio frequency identification (RFID) is a kind of wireless communication technology, can be with
Specific objective is identified by radio signals and reads and writes related data, without establishing machinery between identifying system and specific objective
Or optical contact.The signal of radio is the electromagnetic field by being tuned into radio frequency, data from being attached on article
Send out on label, recognized with automatic with following the trail of the article.In the electromagnetic field that some labels are sent in identification from identifier
Energy is can be obtained by, and does not need battery；Also there is label to possess power supply in itself, and can actively send radio wave and (be tuned into
The electromagnetic field of radio frequency).Label contains the information of Electronic saving, can be identified within several meters.It is different from bar code
, RF tag need not be within identifier sight, can also be embedded in and be tracked within object.Radio-frequency identification card 140
In can store the identity information of working plate 100 and/or the identity information of Devices to test 200, such as the numbering of working plate 100
And/or label etc., the product ID (Serial Number, SN code) of Devices to test 200.
Radio-frequency readers 340 can be set in master control device 300, and radio-frequency readers 340 connect with signal processing module 320
Connect；Radio-frequency readers 340 can directly read the product ID of the Devices to test 200 of its carrying from radio-frequency identification card 140,
Identify it is currently which platform Devices to test 200 is tested by signal processing module 320 again；It is of course also possible to set by be measured
It is when being fixed on for 200 on working plate 100, the identity information of Devices to test 200 is corresponding with the identity information of working plate 100, will
The corresponding relation stores beyond the clouds, then when follow-up device under test 200 is tested, radio-frequency readers 340 read working plate
After 100 identity information, it is currently to that signal processing module 320 can be matched by corresponding relation for which platform Devices to test 200
Tested, and test result is associated into preservation with the identity information of Devices to test 200.By this programme, it can also monitor and treat
Production and test phase residing for measurement equipment 200, can be with the information source tracing of device under test 200.
Wherein, radio-frequency identification card 140 can be RFID (Radio Frequency Identification, radio frequency identification)
Card, naturally it is also possible to for NFC (Near Field Communication, wireless near field communication) module etc..Work as radio frequency identification
When card 140 is RFID card, the identity information stored in RFID card can be read by RFID reader.Radio-frequency identification card 140 is
The unit of identity information can be arbitrarily stored, this can not limited according to the applicable unit of actual use demand selection, the present invention
System.
Next it is described so that Devices to test 200 is television set as an example, the interface of television set is more, such as USB
(Universal Serial Bus, USB) interface, AV/OUT (Audio Video OUT, audio-visual output) interface,
HDMI (High Definition Multimedia Interface, high-resolution multimedia) interface, VGA ((Video
Graphics Array), video and graphic display) (Component Video Connector, component video connect by interface and YPbPr
Connect device) interface etc., and similar interface may be provided with multiple, same interface may have multiple binding posts, and such as USB interface
Comprising multiple stitch, each stitch need to be tested, so, the second connector 120 has multiple docking points, to guarantee to distinguish
It is connected with the port (stitch) for needing to test in Devices to test 200；Docking point and the first connector in second connector 120
Docking point quantity and position correspondence in 400, the first connector 400 are connected with Devices to test 200 by detection line, the second connection
Device 120 is connected with signal generator 330 by detection line, and different wire rods is provided with according to Devices to test 200, such as VGA line,
AV lines, YPbPr lines or HDMI wire etc., and because substantial amounts of detection line is disposed adjacent, in order to prevent signal interference, band can be used
The wire rod of screen layer.
First connector 400 and the second connector 120 can be docked easily, the detection line at both ends is turned on, entered
And the audio-video signal for sending signal generator 330 is transmitted to Devices to test 200, for example, docking male seat can be selected to be used as the
A connector 400, docking female seat is as the second connector 120, it is, of course, also possible to be other forms, the present invention does not make to this
Limit.
First connector 400 and the second connector 120 can be automatically controlled docking by machine, as shown in figure 4, passing through driving
Device 500 performs docking operation.Drive device 500 is connected with the first connector 400, and docking operation is performed receiving control
During docking instruction, the first connector 400 of control docks with the second connector 120, certainly, can be with after test operation terminates
Send separation command control drive device 500 the first connector 400 is separated with the second connector 120 so that working plate 100 with
Producing line row, carry Devices to test 200 and enter next operation.
During test, working plate 100 generally stays in the fixed position of detection station, so as to the second connector
120 position is also substantially stationary, and the first connector 400 can be arranged on to the top in the precalculated position of the second connector 120, then driven
Dynamic device 500 can select pneumatic docking facilities simple in construction and cheap, and the first company can be achieved by pushing/pulling up
Connect the docking of device 400 and the second connector 120/separate.It is of course also possible to it is used as drive device 500, machinery from mechanical arm etc.
Arm is the Mechatronic device of anthropomorphic arm, wrist and hand function, it can any object or instrument spatially pose (position and
Posture) time-varying requirement move, so as to complete a certain industrial job requirements.Soldering turret or welding gun are such as clamped, to vapour
Car or body of motor cycle have carried out spot welding or arc-welding；Carry die casting or stamping forming part or component；It is cut by laser；Spray
Apply；Make-up machinery parts etc..It is divided into by type of drive：Fluid pressure type, pneumatic type and electrodynamic type etc..Make the first connector 400
Other positions can be arranged on, are easy to large-scale Devices to test 200 to pass through from producing line.It can certainly be connected by manual control first
The connector 120 of device 400 and second docks.
Fault detection system 900 designed by the present invention device under test 200 can be detected automatically, so as to a work
People can manage more master control devices 300, and because Devices to test 200 there may be failure, and fault detection system 900 is being run
During break down unavoidably, for the ease of management and control, as shown in figure 5, being provided with alarm module in master control device 300
350, alarm module 350 is connected with signal processing module 320, when signal processing module 320 judges the work(of Devices to test 200
When can be abnormal, output prompt messages to alarm module 350；Alarm module 350 is sent out according to prompt messages
Speak and/or light alarm information, for example, the device such as buzzer, so that worker can pinpoint the problems and handle in time.
Although the accompanying drawing of the various embodiments described above increases some units to realize on the basis of previous embodiment accompanying drawing,
But increased unit can in any combination in each embodiment, the invention is not limited in this regard.
For fault test set embodiment, because it corresponds essentially to fault detection system embodiment, so phase
Part is closed referring to the part of fault detection system embodiment to illustrate.Fault test set embodiment described above is only
Be it is schematical, wherein the unit illustrated as separating component can be or may not be it is physically separate, make
It can be for the part that unit is shown or may not be physical location, you can with positioned at a place, or can also divide
Cloth is on multiple NEs.Some or all of module therein can be selected to realize present invention side according to the actual needs
The purpose of case.Those of ordinary skill in the art are without creative efforts, you can to understand and implement.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
God any modification, equivalent substitution and improvements done etc., should be included within the scope of protection of the invention with principle.
Claims (10)
- A kind of 1. fault detection system, it is characterised in that including：Working plate, master control device and the first connector；The working plate Including the support and the second connector substrate and setting on the substrate, the support is used to Devices to test being fixed on work In loading board, second connector is connected with Devices to test；The master control device includes：Signal processing module, signal generator and signal acquisition module；The signal generator and institute The connection of the first connector is stated, and controls first connector to be docked with second connector；The signal processing module controls the signal generator to send audio-video signal to Devices to test；The signal acquisition module is used to gather the information exported after the Devices to test processing audio-video signal, and will adopt The information of collection is sent to signal processing module；The signal processing module, it is additionally operable to judge whether the function of Devices to test is normal according to the information of collection.
- 2. fault detection system as claimed in claim 1, it is characterised in that the information of Devices to test output includes：Image and/ Or audio；The signal acquisition module includes：Image acquisition units and audio collection unit；Described image collecting unit, for gathering the image of Devices to test output；The audio collection unit, for gathering the audio of Devices to test output.
- 3. fault detection system as claimed in claim 2, it is characterised in that described image collecting unit is camera or phase Machine；The audio collection unit is microphone.
- 4. fault detection system as claimed in claim 2, it is characterised in that the working plate includes：Radio-frequency identification card, it is used for Store the identity information of the working plate and/or the identity information of Devices to test；The master control device includes：The radio-frequency readers being connected with signal processing module；The radio-frequency readers, for reading the identity information of working plate and/or the identity of Devices to test from radio-frequency identification card Information, and send to signal processing module；The signal processing module, for testing result to be associated with the identity information of Devices to test.
- 5. fault detection system as claimed in claim 1, it is characterised in that second connector has multiple docking points, treats The port for needing to test in measurement equipment connects with corresponding docking point respectively；The docking point quantity and position correspondence in docking point and the first connector in second connector, pair in the second connector Contact is used to be connected with signal generator.
- 6. fault detection system as claimed in claim 5, it is characterised in that first connector is docking male seat, described Second connector is docking female seat.
- 7. fault detection system as claimed in claim 5, it is characterised in that the fault detection system also includes：With first The drive device of connector connection；The signal processing module, for exporting docking instruction before control signal is sent to drive device；The drive device, for instructing the first connector of control to be docked with the second connector according to docking.
- 8. fault detection system as claimed in claim 7, it is characterised in that the drive device is pneumatic docking facilities.
- 9. the fault detection system as any one of claim 1 to 8, it is characterised in that the master control device includes：With The alarm module of signal processing module connection；When signal processing module judges the dysfunction of Devices to test, output prompt messages to alarm module；The alarm module sends sound and/or light alarm information according to prompt messages.
- 10. the fault detection system as any one of claim 1 to 8, it is characterised in that the signal generator and institute The first connector is stated to connect by the signal wire with screen layer.
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