CN208125895U - A kind of Boeing-737 NG aircraft wiper motor automatic fault diagnosis device - Google Patents
A kind of Boeing-737 NG aircraft wiper motor automatic fault diagnosis device Download PDFInfo
- Publication number
- CN208125895U CN208125895U CN201820357719.4U CN201820357719U CN208125895U CN 208125895 U CN208125895 U CN 208125895U CN 201820357719 U CN201820357719 U CN 201820357719U CN 208125895 U CN208125895 U CN 208125895U
- Authority
- CN
- China
- Prior art keywords
- power supply
- connect
- output end
- wiper motor
- circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000003745 diagnosis Methods 0.000 title claims abstract description 15
- 239000004065 semiconductor Substances 0.000 claims description 24
- 238000006243 chemical reaction Methods 0.000 claims description 16
- 239000003990 capacitor Substances 0.000 claims description 14
- 238000003756 stirring Methods 0.000 claims description 7
- 230000032258 transport Effects 0.000 claims description 2
- 238000005259 measurement Methods 0.000 claims 1
- 238000012544 monitoring process Methods 0.000 abstract description 5
- 238000002955 isolation Methods 0.000 abstract description 3
- 238000012423 maintenance Methods 0.000 abstract description 3
- 230000001351 cycling effect Effects 0.000 abstract description 2
- 238000001514 detection method Methods 0.000 description 6
- 230000005611 electricity Effects 0.000 description 5
- 230000004087 circulation Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 240000005561 Musa balbisiana Species 0.000 description 1
- 235000018290 Musa x paradisiaca Nutrition 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Landscapes
- Control Of Direct Current Motors (AREA)
- Control Of Electric Motors In General (AREA)
Abstract
The utility model discloses a kind of Boeing-737 NG aircraft wiper motor automatic fault diagnosis devices, it includes voltage regulator circuit, main operation circuit, status monitor circuit and failure indicating circuit, voltage regulator circuit provides CRANK PULSES for aircraft wiper motor component, main operation circuit realizes the switching of automatic running and manual operation operation by double-point double-throw switch, the automatic cycling operating of aircraft wiper motor is realized by timer, status monitor circuit measures the electric current of main operation circuit by Hall current sensor, to realize monitoring, failure is judged by comparator, failure indicating circuit is when breaking down, it is given a warning by light emitting diode, the power supply of aircraft wiper motor is cut off simultaneously.The utility model can carry out Fault Isolation to the component with hidden failure, to improve maintenance reliability.
Description
Technical field
The utility model relates to a kind of motor failure automatic diagnostic devices, more particularly, to a kind of Boeing-737 NG aircraft rain
Scrape motor failure automatic diagnostic device.
Background technique
Boeing-737 NG aircraft wiper motor belongs to the integrated and complicated electromechanical component of circuit height, including A2 logic card and
A3 power control board.It shows intermittent defect currently, the wiper motor is regular and can not go out in ground test, and failure
Situation can not solidify, and the fault message shown on aircraft is normal in ground test, but will appear after dispatching from the factory and reprocess, to dimension
Quality is repaired to affect.
Common ground test is difficult the wiper motor that locking has hidden failures, and usually base part factory is also not
Failure is immediately exposed, but using breaking down after several hundred circulations, for such component with hidden failures, traditional test
Method can not be eradicated thoroughly and solidify phenomenon of the failure.Producer is only referring to OEM (original equipment manufacturer) both at home and abroad at present
Handbook carries out test in 5-10 minutes, which is not enough to that the wiper motor with hidden failures is thoroughly isolated.
Utility model content
Technical problem to be solved in the utility model, be just to provide a kind of Boeing-737 NG aircraft wiper motor failure from
Dynamic diagnostic device can carry out Fault Isolation to the component with hidden failure, to improve maintenance reliability.
Above-mentioned technical problem is solved, the technical solution adopted in the utility model is as follows：
A kind of Boeing-737 NG aircraft wiper motor automatic fault diagnosis device, it is characterized in that including：
Voltage regulator circuit is equipped with low-speed running signal voltage output end LOW, berthing signal voltage output end PARK, high speed and transports
Rotaring signal voltage output end HIGH, intermittent running signal voltage output end INT；
Main operation circuit, including timer T1, selection switch S1, double-point double-throw switch S2, for wiper motor just
Second socket J1-2 of the electrode connection and third socket J1-3 being connect for the control signal input with wiper motor；
Four fixed contacts of the double-point double-throw switch S2 connect with the first connecting pin of timer T1 respectively, open with selection
It closes the movable contact connection of S1, connect with the second socket J1-2 and pass through second by the first power supply electric wire L1 and power electric wire L2 and the
Two socket J1-2 connections, two movable contacts of double-point double-throw switch S2 are connect with third socket J1-3 and power supply POWER respectively；When
Double-point double-throw switch S2 is stirred, when so that third socket J1-3 being connect with the first connecting pin of timer T1, power supply POWER and
One power supply electric wire L1 connection；When stirring double-point double-throw switch S2, so that the movable contact of third socket J1-3 and selection switch S1 connect
When connecing, power supply POWER is connect with the second power supply electric wire L2；
The timer T1 also pass through third connecting pin and the 4th connecting pin respectively with low-speed running signal voltage output end
LOW is connected with berthing signal voltage output end PARK, in use, timer T1 is connected to its third connecting pin and the first connecting pin,
Or it is connected to its 4th connecting pin and the first connecting pin；
Wherein four fixed contacts of the selection switch S1 are believed with low-speed running signal voltage output end LOW, stop respectively
Number voltage output end PARK, the signal voltage output end HIGH that runs at high speed are connected with intermittent running signal voltage output end INT；
Status monitor circuit, including Hall current sensor U1 and comparator U2B, are measured by Hall current sensor U1
Electric current on first power supply electric wire L1, the output end of Hall current sensor U1 and the comparison voltage input terminal of comparator U2B connect
It connects, in the reference voltage input input reference voltage of comparator U2B；
Failure indicating circuit, including metal-oxide-semiconductor Q1, light emitting diode D6 and first contactor K1, the grid of metal-oxide-semiconductor is compared with
The output end of device U2B connects, and controls the logical of the on-off of light emitting diode D6 and the coil of first contactor K1 by metal-oxide-semiconductor Q1
It is disconnected, pass through the on-off of the first power supply electric wire L1 of normally-closed contact control and the second power supply electric wire L2 of first contactor K1.
The output end of the comparator U2B is also grounded after capacitor C8.
The failure indicating circuit further includes second contactor K2, passes through bypass electric wire between the drain electrode and source electrode of metal-oxide-semiconductor
L3 connection passes through the on-off of the normally opened contact control bypass electric wire L3 of second contactor, when metal-oxide-semiconductor Q1 is connected, the second contact
The coil of device K2 obtains electric.
The status monitor circuit further includes adjustable resistance R1, the reference voltage input and adjustable resistance of comparator U2B
Connection is adjusted the size of the reference voltage of input reference voltage input end by adjustable resistance.
The automatic fault diagnosis device further includes accumulator, controls accumulator by the normally-closed contact of first contactor K1
The on-off of power supply circuit.
The automatic fault diagnosis device further includes voltage conversion circuit, is equipped in voltage conversion circuit and becomes to voltage
The three terminal regulator LM7805 changed, the power input of voltage conversion circuit are connect with the 6th connecting pin of timer T1, by fixed
When device T1 control voltage conversion circuit and power supply between on-off, the output end of voltage conversion circuit respectively with Hall current sense
Device U1 is connected with comparator U2B, provides power supply for Hall current sensor U1 and comparator U2B.
Compared with prior art, the utility model has the advantages that：
1, the utility model can realize the automatic monitoring to aircraft wiper motor failure, be not necessarily to manual intervention, save dimension
The time cost and human cost for repairing enterprise improve the repair quality and maintenance reliability of enterprise.The utility model can also expand
Exhibition is into the loop test of other aircraft utilities base parts with complicated circuit construction.
2, the utility model can also switch to manual detection other than automatic running monitoring by double-point double-throw switch.It cuts
When shifting to manual detection, third socket is connect with the movable contact of selection switch, and power supply is connect with the second power supply electric wire, is passed through at this time
Operating selection switch can carry out the test required in OEM (original equipment manufacturer) handbook.
Detailed description of the invention
Fig. 1 is the circuit diagram of the utility model.
Specific embodiment
The utility model is further described below with reference to embodiment.
The circuit diagram of a kind of Boeing-737 NG aircraft wiper motor automatic fault diagnosis device as shown in Figure 1 comprising steady
Volt circuit, main operation circuit, status monitor circuit, failure indicating circuit, voltage conversion circuit and accumulator.
In circuit diagram, left side is the input terminal of+28V power supply POWER, controls the defeated of power supply POWER by control switch S3
Enter.
Voltage regulator circuit includes first diode D1, zener diode D2, the 4th~the 9th resistance R4~R9, the one or two pole
The anode of pipe D1 is connect with the input electric wire of the power supply POWER in left side, cathode by after the 4th resistance R4 with zener diode D2
Cathode connection, the plus earth of zener diode D2, the 5th~the 9th resistance R5~R9 series connection after with zener diode D2 simultaneously
Connection draws between the 5th resistance R5 and the 6th resistance R6 and runs at high speed signal voltage output end HIGH, the 6th resistance R6 with
Low-speed running signal voltage output end LOW is drawn between 7th resistance R7, is drawn between the 7th resistance R7 and the 8th resistance R8
Intermittent running signal voltage output end INT draws berthing signal voltage output end between the 8th resistance R8 and the 9th resistance R9
PARK。
Main operation circuit includes timer T1, selection switch S1, double-point double-throw switch S2, for the positive electricity with wiper motor
Second socket J1-2 of the pole connection and third socket J1-3 being connect for the control signal input with wiper motor, main operation
Circuit provides power supply by the second socket J1-2 for wiper motor, provides control letter by third socket J1-3 for wiper motor
Number.The first socket J1-1 of ground connection is also shown in figure, for connecting with wiper motor ground terminal.First socket J1-1, second
Socket J1-2 and third socket J1-3 is banana bin.
Four fixed contacts of double-point double-throw switch S2 from top to bottom respectively with the first connecting pin (timer T1 of timer T1
That end of middle label 1) it connects, connect with the movable contact of selection switch S1, is connect with the first power supply electric wire L1 and being supplied with second
Electric wire L2 connection.First power supply electric wire L1 is divided into three branch roads, wherein one with the Hall current of status monitor circuit sensing
The end IN of device U1 connects, and two other connect with the 7th connecting pin of timer T1 and the 8th connecting pin, provides for timer T1
Power supply, the OUT terminal of Hall current sensor U1 connect the anode connection of the 5th diode D5, the second power supply electric wire L2 connection the 4th
The anode of diode D4, the cathode of the 4th diode D4 and the cathode of the 5th diode D5 pass through the first of failure indicating circuit
It is connect after the normally-closed contact of contactor K1 with the second socket J1-2.
Two movable contacts up and down of double-point double-throw switch S2 are connect with third socket J1-3 and power supply POWER respectively.From electricity
It can be seen that in the figure of road, when stirring double-point double-throw switch S2, so that third socket J1-3 is connect with the first connecting pin of timer T1
When, it is at this time automatic running detection pattern that power supply POWER is connect with the first power supply electric wire L1；When stirring double-point double-throw switch S2,
When so that third socket J1-3 being connect with the movable contact of selection switch S1, power supply POWER is connect with the second power supply electric wire L2, at this time
For manual detection mode.
Select wherein four fixed contacts of switch S1 electric with low-speed running signal voltage output end LOW, berthing signal respectively
Pressure output end PARK, the signal voltage output end HIGH that runs at high speed are connected with intermittent running signal voltage output end INT.
The second connection end of timer T1 is grounded, third connecting pin and the 4th connecting pin respectively with selection switch S1 with it is low
Two fixed contacts connection that fast CRANK PULSES voltage output end LOW is connected with berthing signal voltage output end PARK, that is,
Third connecting pin and the 4th connecting pin respectively with low-speed running signal voltage output end LOW and berthing signal voltage output end PARK
Connection.It is controlled by timer T1 and is connected to its third connecting pin and the first connecting pin, or be connected to its 4th connecting pin and connect with first
Connect end；In use process, when third connecting pin is connected to the first connecting pin, low-speed running signal voltage output end LOW and
Three socket J1-3 connection, wiper motor will receive CRANK PULSES, wiper motor operation；When the 4th connecting pin and the first connecting pin connect
When logical, berthing signal voltage output end PARK is connected to third socket J1-3, and wiper motor will receive berthing signal, wiper motor
It is out of service.It is connected to by timer T1 setting third connecting pin with the first connecting pin and the 4th connecting pin connects with the first connecting pin
Wiper motor circular flow can be realized in the logical time.In the present embodiment, sets third connecting pin and be connected to the first connecting pin
Time is 7s, and then the 4th connecting pin and the first connecting pin Lifetime are 3s, and wiper motor completed 6 circulations at one minute,
Complete within one hour 360 circulations, cycle-index needed for Fault Isolation can be completed in eight hours.
The 6th connecting pin of timer T1 and the power input of voltage conversion circuit connect, and provide for voltage conversion circuit
The on-off controlled between voltage conversion circuit and power supply by timer T1 can be realized in power supply.The output end of voltage conversion circuit
It connect with the Hall current sensor U1 of status monitor circuit and comparator U2B, for Hall current sensor U1 and compares respectively
Device U2B provides power supply.Due to wiper motor stop when without for monitoring, so can by set timer T1 time,
In third connecting pin and the first connecting pin Lifetime, the 6th connecting pin and power supply are disconnected, at this time status monitor circuit non-transformer,
Stop monitoring.
Voltage conversion circuit includes the capacitor C1~C5 of three terminal regulator LM7805 and first~the 5th.Three terminal regulator
The end Vin is connect with the 6th connecting pin of timer T1, the end Vout be output end, respectively with the end VCC of Hall current sensor U1
It is connected with the power input of comparator U2B, the end GND ground connection.The end Vin of three terminal regulator is also respectively through first capacitor C1 and
It is grounded after two capacitor C2, the end Vout of three terminal regulator is also respectively after third capacitor C3, the 4th capacitor C4 and the 5th capacitor C5
Ground connection.
Status monitor circuit includes Hall current sensor U1, comparator U2B, adjustable resistance R1, second resistance R2, third
Resistance R3, the tenth resistance R10 and the 6th~the 9th capacitor C6~C9, the model WCS2705 of Hall current sensor U1, compare
The model LM139J of device U2B.
The end Aout of Hall current sensor U1 after second resistance R2 with the comparison voltage input terminal of comparator U2B (-
End) it connects, the comparison voltage input terminal (- end) of comparator U2B is also grounded after the 6th capacitor C6.The benchmark electricity of comparator U2B
Pressure input terminal (+end) is connect after 3rd resistor R3 with the adjustable side of adjustable resistance R1, the reference voltage input of comparator U2B
(+end) also it is grounded after the 7th capacitor.The grid of the metal-oxide-semiconductor Q1 of the output end and failure indicating circuit of comparator U2B connects, also
It is grounded after the 8th capacitor C8.
Because wiper motor component work normally electric current be higher than 500mA, therefore adjust adjustable resistance R1 resistance make it is defeated
Out to the threshold value 2.7V of comparator U2B.When no current flows through Hall current sensor U1, the Aout of Hall current sensor U1
End output 2.5V voltage.Therefore, when wiper motor component can not start, reference voltage input (+end) electricity of comparator U2B
Pressure is higher than comparison voltage input terminal (- end) voltage, and comparator U2B exports high level and gives metal-oxide-semiconductor Q1, triggers failure indicating circuit work
Make.When wiper motor component works normally, the Voltage Feedback of the end the Aout transformation output of Hall current sensor U1 is to comparing
It is higher than reference voltage input (+end) voltage threshold when comparison voltage the input terminal (- end) of device U2B, at this point, comparator U2B is defeated
Low level out, metal-oxide-semiconductor Q1 can not be opened.
The effect of 8th capacitor C8 is：Because the circuit response of wiper motor component internal can postpone a few tens of milliseconds, by J1_
1, when J1_2, J1_3 are switched to component, wiper motor component causes Hall current sensor U1 not feel there is no working at once
Circuit inflow should be arrived, and trigger comparator U2B is overturn, and metal-oxide-semiconductor Q1 can be connected, thus meeting initiating device false alarm, in comparator
The output end of U2B through the 8th capacitor C8 ground connection after, the voltage of the output end of comparator U2B cannot be mutated, delay this tens
In millisecond, the undertension of rising is to drive metal-oxide-semiconductor Q1 to open, and hereafter, wiper motor component enters working condition, comparator
U2B overturning, exports low level, and metal-oxide-semiconductor Q1 is remained open.
Failure indicating circuit includes metal-oxide-semiconductor Q1, light emitting diode D6, first contactor K1, second contactor K2 and third
Diode D3 is controlled by bypass electric wire L3 connection between the drain electrode and source electrode of metal-oxide-semiconductor by the normally opened contact of second contactor
Bypass the on-off of electric wire L3.The coil of first contactor K1, the coil of second contactor K2 and third diode D3 are parallel with one another
Afterwards, the drain electrode connection of one end and metal-oxide-semiconductor, one end is connect with 28V power supply.The anode of light emitting diode D6 is connect with 28V power supply, is born
The drain electrode of pole and metal-oxide-semiconductor connects.The source electrode of metal-oxide-semiconductor is grounded.Metal-oxide-semiconductor Q1 is given when comparator U2B exports high level, metal-oxide-semiconductor is connected
When, light emitting diode D6 obtains electric, issue alarm light, first contactor K1 and second contactor K2 obtain it is electric, first contactor K1's
Normally-closed contact disconnects, and the connection of the second socket J1-2 and power supply disconnects, and wiper motor component power loss, second contactor K2's is normally opened
Contact closure, bypass electric wire L3 connection.The effect of bypass electric wire L3 is the comparator U2B false triggering for avoiding electromagnetic interference from causing
Metal-oxide-semiconductor Q1.
1 foot of accumulator connects power supply, 2 feet ground connection by power supply line, and power supply line also have passed through the normal of first contactor K1
Closed contact, by the on-off of the power supply of first contactor K1 control accumulator.Accumulator is for adding up aircraft windscreen wiper circular flow
Number.
In use, when stirring double-point double-throw switch S2, so that third socket J1-3 is connect with the movable contact of selection switch S1,
It is at this time automatic running detection pattern, timer T1 obtains electricity operation, windscreen wiper when power supply POWER is connect with the second power supply electric wire L2
Motor sub-assembly automatic cycling operating.When stirring double-point double-throw switch S2, so that the dynamic touching of third socket J1-3 and selection switch S1
When point connection, it is at this time manual detection mode that power supply POWER is connect with the second power supply electric wire L2, timer T1 power loss, power supply
POWER directly gives wiper motor assembly power supply through the second power supply electric wire L2 and the second socket J1-2, by operating selection switch S1,
The test required in OEM (original equipment manufacturer) handbook can be carried out, its performance parameter is tested.Wherein, when low-speed running signal
When voltage output end LOW is connect with third socket J1-3, aircraft windscreen wiper low-speed running may make；When berthing signal voltage output end
When PARK is connect with third socket J1-3, it may make aircraft windscreen wiper is returned to operate by original position stop；When the signal voltage that runs at high speed is defeated
When outlet HIGH is connect with third socket J1-3, aircraft windscreen wiper may make to run at high speed；When intermittent running signal voltage output end
When INT is connect with third socket J1-3, it may make the operating of aircraft windscreen wiper to rest after a week certain time, then rerun, then stop
It has a rest, so recycles.
Claims (6)
1. a kind of Boeing-737 NG aircraft wiper motor automatic fault diagnosis device, which is characterized in that including：
Voltage regulator circuit is equipped with low-speed running signal voltage output end (LOW), berthing signal voltage output end (PARK), high speed and transports
Rotaring signal voltage output end (HIGH), intermittent running signal voltage output end (INT)；
Main operation circuit, including timer (T1), selection switch (S1), double-point double-throw switch (S2), be used for and the windscreen wiper horse
The second socket (J1-2) of the positive electrode connection reached and the third for being connect with the control signal input of the wiper motor
Socket (J1-3)；
Four fixed contacts of the double-point double-throw switch (S2) are connect respectively with the first connecting pin of the timer (T1) and institute
The movable contact connection of selection switch (S1) is stated, connect and passes through with second socket (J1-2) by the first power supply electric wire (L1)
Second power supply electric wire (L2) is connect with second socket (J1-2), two movable contacts difference of the double-point double-throw switch (S2)
It is connect with the third socket (J1-3) and power supply (POWER)；When stirring the double-point double-throw switch (S2), so that the third
When socket (J1-3) is connect with the first connecting pin of timer (T1), the power supply (POWER) connects with the first power supply electric wire (L1)
It connects；When stirring the double-point double-throw switch (S2), so that the movable contact of the third socket (J1-3) and selection switch (S1) connects
When connecing, the power supply (POWER) connect with the second power supply electric wire (L2)；
The timer (T1) is also exported with the low-speed running signal voltage by third connecting pin and the 4th connecting pin respectively
Hold (LOW) and berthing signal voltage output end (PARK) to connect, in use, the timer (T1) be connected to its third connecting pin and
First connecting pin, or it is connected to its 4th connecting pin and the first connecting pin；
It is described selection switch (S1) wherein four fixed contacts respectively with the low-speed running signal voltage output end (LOW), stop
By signal voltage output end (PARK), run at high speed signal voltage output end (HIGH) and intermittent running signal voltage output end
(INT) it connects；
Status monitor circuit, including Hall current sensor (U1) and comparator (U2B), pass through the Hall current sensor
(U1) electric current in the first power supply electric wire (L1) of measurement, the output end and the comparator of the Hall current sensor (U1)
(U2B) comparison voltage input terminal connection, in the reference voltage input input reference voltage of the comparator (U2B)；
Failure indicating circuit, including metal-oxide-semiconductor (Q1), light emitting diode (D6) and first contactor (K1), the grid of the metal-oxide-semiconductor
It is connect with the output end of comparator (U2B), passes through the on-off of the metal-oxide-semiconductor (Q1) control light emitting diode (D6) and the first contact
The on-off of the coil of device (K1) passes through the first power supply electric wire (L1) and second of normally-closed contact control of the first contactor (K1)
The on-off of power supply electric wire (L2).
2. Boeing-737 NG aircraft wiper motor automatic fault diagnosis device according to claim 1, it is characterised in that：Institute
The output end for stating comparator (U2B) is also grounded after capacitor (C8).
3. Boeing-737 NG aircraft wiper motor automatic fault diagnosis device according to claim 1, it is characterised in that：Institute
Stating failure indicating circuit further includes second contactor (K2), passes through bypass electric wire (L3) between the drain electrode and source electrode of the metal-oxide-semiconductor
Connection controls the on-off of bypass electric wire (L3) by the normally opened contact of the second contactor (K2), when the metal-oxide-semiconductor
(Q1) when connecting, the coil of the second contactor (K2) obtains electric.
4. Boeing-737 NG aircraft wiper motor automatic fault diagnosis device according to claim 1, it is characterised in that：Institute
Stating status monitor circuit further includes adjustable resistance (R1), the reference voltage input and the adjustable electric of the comparator (U2B)
(R1) connection is hindered, the size of the reference voltage of input reference voltage input end is adjusted by the adjustable resistance.
5. Boeing-737 NG aircraft wiper motor automatic fault diagnosis device according to claim 1, it is characterised in that：Institute
Stating automatic fault diagnosis device further includes accumulator, controls the accumulator by the normally-closed contact of the first contactor (K1)
The on-off of power supply circuit.
6. Boeing-737 NG aircraft wiper motor automatic fault diagnosis device according to claim 1, it is characterised in that：Institute
Stating automatic fault diagnosis device further includes voltage conversion circuit, and three converted to voltage are equipped in the voltage conversion circuit
It holds voltage-stablizer (LM7805), the 6th connecting pin of the power input of the voltage conversion circuit and the timer (T1) connect
Connect, the on-off between the voltage conversion circuit and power supply controlled by the timer (T1), the voltage conversion circuit it is defeated
Outlet is connect with the Hall current sensor (U1) and comparator (U2B) respectively, be the Hall current sensor (U1) and
Comparator (U2B) provides power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820357719.4U CN208125895U (en) | 2018-03-15 | 2018-03-15 | A kind of Boeing-737 NG aircraft wiper motor automatic fault diagnosis device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820357719.4U CN208125895U (en) | 2018-03-15 | 2018-03-15 | A kind of Boeing-737 NG aircraft wiper motor automatic fault diagnosis device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208125895U true CN208125895U (en) | 2018-11-20 |
Family
ID=64198912
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820357719.4U Active CN208125895U (en) | 2018-03-15 | 2018-03-15 | A kind of Boeing-737 NG aircraft wiper motor automatic fault diagnosis device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208125895U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108490352A (en) * | 2018-03-15 | 2018-09-04 | 广州飞机维修工程有限公司 | A kind of Boeing-737 NG aircrafts wiper motor automatic fault diagnosis device |
-
2018
- 2018-03-15 CN CN201820357719.4U patent/CN208125895U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108490352A (en) * | 2018-03-15 | 2018-09-04 | 广州飞机维修工程有限公司 | A kind of Boeing-737 NG aircrafts wiper motor automatic fault diagnosis device |
| CN108490352B (en) * | 2018-03-15 | 2024-01-09 | 广州飞机维修工程有限公司 | Automatic diagnosis device for faults of wave tone 737NG aircraft wiper motor |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN209590215U (en) | A kind of Frequency Converter Control Board Test System | |
| CN102562402B (en) | Intelligent starting protection system for starters | |
| CN106707158A (en) | Time relay calibration device and calibration method thereof | |
| CN111157841B (en) | Fault quick positioning device for secondary circuit of electric operation type isolating switch | |
| CN110905733B (en) | A pitch cabinet test system | |
| CN109342973A (en) | DC supply input status monitoring circuit and system | |
| CN207232324U (en) | A kind of fault diagnosis circuit of low side driving | |
| CN111257024A (en) | Washer detection system and method | |
| CN208125895U (en) | A kind of Boeing-737 NG aircraft wiper motor automatic fault diagnosis device | |
| CN201110878Y (en) | Aging test system | |
| CN2935175Y (en) | Power Line Fault Indicator | |
| CN107942241A (en) | A kind of hookup for high voltage DC breaker submodule | |
| CN108490352A (en) | A kind of Boeing-737 NG aircrafts wiper motor automatic fault diagnosis device | |
| CN202110249U (en) | An automatic test system for air conditioner control board | |
| CN221056856U (en) | Testing device and testing system of whole vehicle controller | |
| CN110764000B (en) | Motor reliability test device, control method and system | |
| CN109683508A (en) | A kind of band detects and the steering handwheel control system of the online self-test of BIT automatically | |
| CN210433886U (en) | Automatic water supply and water receiving control module | |
| CN114755569A (en) | Relay function detection device and use method thereof | |
| CN209343178U (en) | A kind of frequency converter terminal test systems | |
| CN209728111U (en) | A kind of single-board testing equipment | |
| CN108223348B (en) | SCR metering pump offline test bench | |
| CN209618638U (en) | A kind of bypass frequency conversion escalator fault detection means | |
| CN105974910A (en) | Automatic energization control apparatus and system | |
| CN221200295U (en) | Electric control system for carrying out load diagnosis based on tiny instantaneous current change characteristics |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |