Main paddle distributor with fault isolation function and fault isolation method

Abstract

The invention belongs to a helicopter rotor anti-icing and de-icing technology, and particularly relates to a main paddle distributor with a fault isolation function and a fault isolation method. The main paddle distributor is composed of a switch element, a control module of the switch element, a signal processing module, a switch element voltage checking module, a current checking module and a power supply module. The switch element and the control module thereof are used for controlling on-off of an alternating current power supply of the main blade heating element; the signal processing module is connected with the switch element voltage checking module, the heating current checking module and the power supply module, and is used for controlling the on-off of the switch element, collecting fault information, isolating faults, and judging and reporting the faults; the switch element voltage checking module is used for detecting the voltage state of the switch element; and the current checking module is used for detecting the C-phase heating current state of the main paddle blade. According to the invention, the problem that the main paddle heating element is difficult to isolate from the main paddle distributor fault is solved, the testability and fault response capability of the main paddle distributor are improved, and the accuracy and safety of the architecture are improved.

Description

Technical Field

[0001] The invention belongs to the technical field of helicopter rotor anti-icing and de-icing, and relates to a main rotor distributor with a fault isolation function and a fault isolation method. Background Art

[0002] When a helicopter encounters an icing environment during flight, the rotor anti-icing system ensures the flight safety of the aircraft when it passes through icy clouds. The main rotor distributor is an important component of the rotor anti-icing system to perform main rotor deicing, so the fault detection and isolation functions of the main rotor distributor are particularly important. The existing main rotor distributor has a large number of switch components and limited internal space, so the fault location cost is high and the time is long. The existing main rotor distributor lacks self-detection and fault reporting functions, and the maintenance cost is high after a fault occurs. Summary of the invention

[0003] The purpose of the present invention is to provide a main propeller distributor with fault isolation function and a fault isolation method. The present invention solves the problem that the main propeller blade heating element and the main propeller distributor are difficult to isolate, improves the testability and fault response capability of the main propeller distributor, and improves the sensitivity and safety of the architecture.

[0004] The technical solution of the present invention is:

[0005] A main propeller distributor with a fault isolation function, comprising: a switch element and a control module thereof, a signal processing module, a switch element voltage detection module, a current detection module, and a power supply module;

[0006] The switch element and its control module are used to control the on and off of the AC power supply of the main blade heating element;

[0007] The switch element voltage checking module is used to detect the voltage status of all switch elements;

[0008] The current checking module is used to detect the main propeller heating current state;

[0009] The signal processing module is connected to the switch element voltage detection module, the heating current detection module, and the power supply module, and is used to determine whether the switch element and its control module are faulty, and to perform fault isolation, fault judgment and reporting after a fault occurs.

[0010] Furthermore, the switching element and its control module include M*N units, M is the number of blade partitions, N is the number of blades, and each unit includes: a first thyristor, a second thyristor, a first optocoupler, a second optocoupler, a first transistor and a resistor.

[0011] The anode of the input end of the first optocoupler N2 is connected to the resistor R2, the cathode of the input end of the first optocoupler N2 is connected to the anode of the input end of the second optocoupler N3, the anode of the output end of the first optocoupler N2 is connected to the AC A phase power supply through the resistor R4, and the cathode of the output end of the first optocoupler N2 is connected to the control electrode of the first thyristor A1;

[0012] The cathode of the input end of the second optical coupler N3 is connected to the collector of the first transistor V1, the anode of the output end of the second optical coupler N3 is connected to the AC B-phase power supply through the resistor R3, and the cathode of the output end of the second optical coupler N3 is connected to the control electrode of the second thyristor B1;

[0013] The base of the first transistor V1 is connected to the resistor R1, and the emitter of the first transistor V1 is grounded;

[0014] The anode of the first thyristor A1 is connected to the AC A-phase power supply, the cathode of the first thyristor A1 is connected to the control electrode with a resistor R5, the cathode of the first thyristor A1 is the voltage signal output terminal of the switch element and its control module unit, connected to the switch element voltage inspection module, and the cathode of the first thyristor A1 is also the A-phase power output terminal of the switch element and its control module unit, connected to the heating element;

[0015] The anode of the second thyristor B1 is connected to the AC B-phase power supply, the cathode of the second thyristor B1 is connected to the control electrode with a resistor R6, the cathode of the second thyristor B1 is the voltage signal output terminal of the switch element and its control module unit, connected to the switch element voltage inspection module, and the cathode of the second thyristor B1 is also the B-phase power output terminal of the switch element and its control module unit, connected to the heating element;

[0016] The other end of the resistor R2 and the resistor R1 is the control signal input end of the switch element and its control module unit, and is connected to the signal processing module;

[0017] The C-phase AC power supply and the C-phase heating element input end are the current detection signal output ends of the switch element and its control module unit, and are connected to the current detection module.

[0018] Further, the switch element voltage checking module includes: a rectifier bridge, a voltage regulator diode, a third optical coupler, a resistor and a filter capacitor;

[0019] The bridge arm A of the rectifier bridge D1 is connected to each switch element of the N blades and the output end of the A-phase thyristor of the control module unit, and the bridge arm B is connected to each switch element of the N blades and the output end of the B-phase thyristor of the control module unit;

[0020] A resistor R24 ​​and a capacitor C6 are connected in parallel between the bridge arms C and D of the rectifier bridge D1;

[0021] One end of the capacitor C6 is connected to the resistor R25 and the cathode of the diode in sequence, the anode of the diode is connected to the anode of the third optocoupler input end, and the other end of the capacitor C6 is connected to the cathode of the third optocoupler input end;

[0022] The anode of the output end of the third optocoupler N9 is connected to a 5V power supply through a resistor R26, the cathode of the output end of the third optocoupler N9 is grounded, and the anode of the output end of the third optocoupler N9 is connected to the signal processing module as the signal output end of the switching element voltage detection module.

[0023] Further, the current checking module includes: a current sensor, a first operational amplifier, a second operational amplifier, a fourth optical coupler, a resistor and a filter capacitor;

[0024] The Iin and Iout terminals of the current sensor N6 are connected to the Iin and Iout terminals of each switch element of the first blade, the third blade, and the fifth blade and the control module unit thereof, the +VS terminal, the -VS terminal, and the GND terminal of the current sensor N6 are connected to the +15V power supply, the -15V power supply, and the ground respectively, and the Vout terminal of the current sensor N6 is connected to the resistor R15;

[0025] The other end of the resistor R15 is connected to the positive input pin of the first operational amplifier N7A, the resistor R20 is connected between the output end and the negative input end of the first operational amplifier N7A, the resistor R16 is connected between the negative input end of the first operational amplifier N7A and the ground, the positive and negative power supply ends of the first operational amplifier N7A are connected to the +15V power supply and the -15V power supply, and the output end of the first operational amplifier N7A is connected to the negative input end of the second operational amplifier N8A;

[0026] The positive input terminal of the second operational amplifier N8A is connected to a 11V reference voltage, the positive and negative power supply terminals of the second operational amplifier N8A are connected to a +15V power supply and a -15V power supply, a resistor R21 is connected between the output terminal of the second operational amplifier N8A and the positive power supply terminal, and the output terminal of the second operational amplifier N8A is connected to a resistor R22;

[0027] The other end of the resistor R22 is connected to the anode of the fourth optocoupler N8 input terminal, the cathode of the fourth optocoupler N8 input terminal is connected to the ground, the anode of the fourth optocoupler N8 output terminal is connected to the 5V power supply through the resistor R23, the cathode of the fourth optocoupler N8 output terminal is grounded, and the anode of the fourth optocoupler N8 output terminal is the signal output terminal of the current detection module, which is connected to the signal processing module.

[0028] Furthermore, the signal processing module includes: a single chip microcomputer, a first inverter, a second inverter, a crystal oscillator, a first transistor, a second transistor, a third transistor, a resistor and a filter capacitor. The connection relationship of the signal processing module is as follows:

[0029] The P2.3 and P2.4 terminals of the single-chip computer N1 are connected to the output terminals of the switching element voltage detection module and the heating current detection module;

[0030] The P0.0, P0.1, P0.2, P0.3 and P0.4 terminals of the single-chip microcomputer N1 are connected to the 5V power supply through resistors R7, R8, R9, R10 and R11, the P0.0, P0.1, P0.2, P0.3 and P0.4 terminals of the single-chip microcomputer N1 are connected to the 1A, 2A, 3A, 4A and 5A terminals of the first inverter N5, and the P2.0, P2.1 and P2.2 terminals of the single-chip microcomputer N1 are connected to the 1A, 2A, 3A, 4A and 5A terminals of the second inverter N4. A, 2A and 3A terminals, P3.0 and P3.1 terminals of the single-chip microcomputer N1 are connected to the serial port receiving and serial port sending, the crystal oscillator G1 is connected between the X1 and X2 terminals of the single-chip microcomputer N1, the X1 and X2 terminals of the single-chip microcomputer N1 are grounded through capacitors C1 and C2 respectively, the VCC terminal and EA terminal of the single-chip microcomputer N1 are connected to a 5V power supply, the PSEN terminal and GND terminal of the single-chip microcomputer N1 are grounded, and the VCC terminal of the single-chip microcomputer N1 is grounded through capacitor C3;

[0031] The VCC terminal of the first inverter N5 is connected to a 5V power supply, the VCC terminal of the first inverter N5 is grounded through a capacitor C7, the GND terminal of the first inverter N5 is grounded, and 1Y, 2Y, 3Y, 4Y and 5Y of the first inverter N5 are output terminals of the signal module, connected to the switch element and its control module;

[0032] The VCC terminal of the second inverter N4 is connected to a 5V power supply, the VCC terminal of the second inverter N4 is grounded through a capacitor C4, the GND terminal of the second inverter N4 is grounded, 1Y, 2Y and 3Y of the second inverter N4 are connected to the bases of the first triode V2, the second triode V3 and the third triode V4 through resistors R12, R13 and R14, the collectors of the first triode V2, the second triode V3 and the third triode V4 are connected to a 5V power supply, the emitters of the first triode V2, the second triode V3 and the third triode V4 are grounded through resistors R19, R17 and R18, and the emitters of the first triode V2, the second triode V3 and the third triode V4 are the output ends of the signal module, which are connected to the switch element and its control module.

[0033] A method for isolating a main propeller distributor fault with a fault isolation function is implemented based on the main propeller distributor, and the method comprises the following steps:

[0034] Step 1: Power on and perform self-test. If the self-test fails, a fault will be reported. If it passes, proceed to the next step.

[0035] Step 2: The signal processing module receives the system working status and selects a mode. The working mode is selected to send a maintenance self-check sequence or a de-icing heating sequence to the switch element and its control module. The above sequence includes the current heating zone information, and controls the switch element to turn on to heat the blades.

[0036] Step 3: The signal processing module receives the total current value and determines the total current value range:

[0037] Total current ≥ 70A, go to step 4;

[0038] 70A>total current>62A, return to step 2;

[0039] 62A≥Total current>58A, go to step 5;

[0040] 58A≥total current, go to step 6;

[0041] Step 4: The signal processing module cuts off the power supply to protect the line, stops working and reports the fault;

[0042] Step 5: Determine whether the current check signal and the switch element voltage signal exceed their respective set thresholds:

[0043] If the current check signal exceeds the threshold and the switch element voltage signal exceeds the threshold, proceed to step seven;

[0044] If the current check signal exceeds the threshold but the switch element voltage signal does not exceed the threshold, proceed to step eight;

[0045] If the current check signal does not exceed the threshold but the switch element voltage signal exceeds the threshold, proceed to step nine;

[0046] If the current check signal does not exceed the threshold and the switch element voltage signal does not exceed the threshold, proceed to step ten;

[0047] Step 6: Determine whether the voltage signal of the switching element exceeds the respective set threshold:

[0048] When the voltage of the switch element exceeds the set threshold, the process goes to step 11;

[0049] If the voltage of the switch element does not exceed the set threshold, the process goes to step 12;

[0050] Step 7: The signal processing module determines whether the switch element of the current heating zone of blade 1, blade 3 or blade 5 is broken according to the current heating zone information, reports the fault and performs degraded heating;

[0051] Step 8: The signal processing module determines that the blade heating element of the current heating zone of blade 1, blade 3 or blade 5 is broken according to the current heating zone information, reports the fault and performs degraded heating;

[0052] Step nine: The signal processing module determines whether the switch element of the current heating zone of blade 2, blade 4 or blade 6 is broken according to the current heating zone information, reports the fault and performs degraded heating;

[0053] Step 10: The signal processing module determines that the blade heating element of the current heating zone of blade 2, blade 4 or blade 6 is broken according to the current heating zone information, reports the fault and performs degraded heating;

[0054] Step 11: The signal processing module determines that the switch elements of the current heating zones of blades 1 and 4, blades 3 and 6, or blades 5 and 2 are broken according to the current heating zone information, reports the fault and stops heating;

[0055] Step 12: The signal processing module determines that the blade heating elements of the current heating zone of blades 1 and 4, blades 3 and 6, or blades 5 and 2 are broken according to the current heating zone information, reports the fault and stops heating;

[0056] Further, in step 4, the specific process is:

[0057] The signal processing module stops sending timing signals to the switch element and its control module, the signal processing module sets Q1, Q2, Q3, Q4, Q5, R1, R2 and R3 to a low level, the switch element turns off the AC heating power supply and stops working, and the signal processing module reports fault information.

[0058] Further, in step five, the specific process is:

[0059] The signal processing module determines the subsequent work according to the current check signal and the switch element voltage signal. If the current check signal is greater than 3V and the switch element voltage signal is greater than 3V, proceed to step seven;

[0060] If the current check signal is greater than 3V but the switch element voltage signal is less than 3V, proceed to step eight;

[0061] If the current check signal is less than 3V but the switch element voltage signal is greater than 3V, proceed to step nine;

[0062] If the current check signal is less than 3V and the switch element voltage signal is less than 3V, proceed to step ten;

[0063] Further, in step six, the specific process is:

[0064] The signal processing module determines the subsequent work according to the voltage signal of the switch element. If the voltage signal of the switch element is greater than 3V, the step 11 is performed;

[0065] If the switch element voltage signal is less than 3V, proceed to step 12;

[0066] Further, in step seven, the specific process is:

[0067] The signal processing module determines that the switch element of the current heating zone of blade 1, blade 3 or blade 5 is broken, sends a reported fault information through the serial port, and performs degraded heating: stops sending timing signals to the switch element in the faulty zone and its control module unit, the signal processing module sets Q1, Q2, Q3, Q4, Q5, R1, R2 and R3 of the switch element in the faulty zone and its control module unit to a low level, the switch element in the faulty zone and its control module unit stop heating, and other non-faulty zones are heated normally;

[0068] Further, in step eight, the specific process is:

[0069] The signal processing module determines that the blade heating element of the current heating zone of blade 1, blade 3 or blade 5 is broken, sends a reported fault information through the serial port, and performs degraded heating: stops sending timing signals to the switch element and its control module unit in the faulty zone, the signal processing module sets Q1, Q2, Q3, Q4, Q5, R1, R2 and R3 of the switch element and its control module unit in the faulty zone to low level, the switch element and its control module unit in the faulty zone stops heating, and other non-faulty zones are heated normally;

[0070] Further, in step nine, the specific process is:

[0071] The signal processing module determines that the switch element of the current heating zone of blade 2, blade 4 or blade 6 is broken, sends a reported fault information through the serial port, and performs degraded heating: stops sending timing signals to the switch element in the faulty zone and its control module unit, the signal processing module sets Q1, Q2, Q3, Q4, Q5, R1, R2 and R3 of the switch element in the faulty zone and its control module unit to a low level, the switch element in the faulty zone and its control module unit stop heating, and other non-faulty zones are heated normally;

[0072] Further, in step ten, the specific process is:

[0073] The signal processing module determines that the blade heating element of the current heating zone of blade 2, blade 4 or blade 6 is broken, sends a reported fault information through the serial port, and performs degraded heating: stops sending timing signals to the switch element and its control module unit in the fault zone, the signal processing module sets Q1, Q2, Q3, Q4, Q5, R1, R2 and R3 of the switch element and its control module unit in the fault zone to low level, the switch element and its control module unit in the fault zone stops heating, and other non-fault zones are heated normally;

[0074] Further, in step 11, the specific process is:

[0075] The signal processing module determines that the switch elements of the current heating zone of blades 1 and 4, blades 3 and 6, or blades 5 and 2 are broken, the signal processing module sets Q1, Q2, Q3, Q4, Q5, R1, R2 and R3 to low level, the switch elements turn off the AC heating power supply, stop working, and the signal processing module reports fault information;

[0076] Further, in step twelve, the specific process is:

[0077] The signal processing module determines that the blade heating element in the current heating zone of blades 1 and 4 or blades 3 and 6 or blades 5 and 2 is short-circuited, the signal processing module sets Q1, Q2, Q3, Q4, Q5, R1, R2 and R3 to a low level, the switching element turns off the AC heating power supply and stops working, and the signal processing module reports fault information.

[0078] The advantages of the present invention are as follows: the main rotor distributor currently used in helicopters has a complex structure, with many parallel heating circuits, which is difficult to isolate after a fault occurs, lacks fault self-detection and self-protection functions, and is difficult to locate the fault point after the distributor fails, and is difficult to isolate the main blade fault and the main rotor distributor fault. When the main rotor distributor or the main blade fails, the aircraft cannot determine the fault point, which will affect the degraded heating function of the rotor anti-icing system, thereby affecting flight safety. The present invention adds a fault isolation function to the main rotor distributor, checks the operating voltage of the switch elements inside the distributor and the main blade heating current, and judges the inspection results and the fault. When the main rotor distributor fails and the main blade fails, the fault information is reported to the aircraft, and the main rotor is short-circuited or degraded for heating according to the fault situation, thereby improving the testability and fault detection capabilities of the rotor anti-icing system. BRIEF DESCRIPTION OF THE DRAWINGS

[0079] Figure 1 This is the principle block diagram of the main propeller distributor with fault isolation function;

[0080] Figure 2 A switching element and a control module thereof as one unit;

[0081] Figure 3 A connection diagram of a 5*6 unit switch element and its control module with a current check module and a switch element voltage check module;

[0082] Figure 4 This is the schematic diagram of the switch element voltage check module;

[0083] Figure 5 This is the schematic diagram of the current check module;

[0084] Figure 6 This is the schematic diagram of the signal processing module;

[0085] Figure 7Flowchart of the main propeller distributor fault isolation method. DETAILED DESCRIPTION

[0086] The present invention is further described below in conjunction with the accompanying drawings and examples, but they are not intended to limit the present invention.

[0087] Embodiment 1. A main propeller distributor with a fault isolation function, comprising: Figure 1 As shown, the main propeller distributor is composed of a switch element and its control module, a signal processing module, a switch element voltage detection module, a current detection module, and a power supply module. The switch element and its control module are used to control the on and off of the AC power supply of the main propeller blade heating element. The switch element and its control module are composed of 5*6 units, such as Figure 3 As shown; the signal processing module is connected to the switch element voltage inspection module, the heating current inspection module, and the power supply module, and is used for fault information collection, fault isolation, fault judgment and reporting; the switch element voltage inspection module is used to detect the switch element voltage state; the current inspection module is used to detect the main propeller blade heating current state.

[0088] When the aircraft is in an icing environment, the main propeller distributor heats each zone of the main blade according to the de-icing control rate and the atmospheric temperature, and calculates the heating time of each zone. The distributor heats the blade heating element through the switch element and the control module. The switch element and the control module correspond to the blade heating zone, with a total of 5*6 units, where 5 is the blade zone and 6 is the number of blades. Blades 1 and 4, blades 3 and 6, and blades 5 and 2 are a group, and each group of blades is heated at the same time. The distributor collects the switch element voltage to determine the working state of the switch element in the current heating zone, and can identify the short circuit and open circuit faults of the switch element, and perform self-test of the distributor at the same time; the signal processing module in the distributor collects the switch element voltage signal and the current check signal, and comprehensively judges according to the total heating current information, and can identify the open circuit faults of the blade heating element and the switch element, and locate the specific fault heating zone, and report the fault through the serial communication method, so as to achieve the purpose of isolating the switch element fault of the distributor from the blade heating element fault.

[0089] The aforementioned switch element and its control module include thyristor, optocoupler, triode and resistor. The input end of the optocoupler is an infrared light-emitting diode, and the output end is a bidirectional photosensitive thyristor. The optocoupler and the resistor form a thyristor zero-crossing trigger circuit to isolate the AC heating circuit and the DC control circuit to achieve on-off control of the high-voltage AC power supply.

[0090] The aforementioned signal processing module includes a single chip microcomputer, an inverter, a transistor, a resistor and a filter capacitor. Figure 6. The single-chip microcomputer receives the status instructions and atmospheric temperature signals from the rotor anti-icing controller through the communication circuit, and controls each group of blades by controlling the I / O outputs of P2.0, P2.1, and P2.2, and realizes partition control by controlling the I / O outputs of P0.0 to P0.4. The control of each heating zone of each group of blades can be realized through the coordinated output of the I / O ports of P0.0 to P0.4 and P2.0 to P2.2; the single-chip microcomputer simultaneously collects the above I / O output signals through the inverter and returns them to the single-chip microcomputer, which can judge the current heating zone information and report it as the working status word of the distributor. The single-chip microcomputer collects the voltage signal and current check signal of the switch element and reports it as the working status word of the blade after judgment. Based on the total current value, when the switching element voltage signal is normal, the total current value and the blade C-phase current are both normal, then the distributor and the main propeller blade heating element are working normally; when the total current value is abnormal, the switching element voltage signal is abnormal, and the blade C-phase current is normal, it can be determined that the distributor switch element is faulty; when the total current value is abnormal, the switch element conduction state is normal, and the blade C-phase current is abnormal, it can be determined that the main propeller blade heating element is faulty.

[0091] The aforementioned switch element voltage detection module includes a rectifier bridge, a voltage regulator diode, an optocoupler, a resistor and a filter capacitor. The circuit is shown in the attached Figure 4 . The AC A and B phase voltage signals at the output end of the switching element are processed by full-wave rectification of the rectifier bridge and then converted into level signals by the optocoupler and transmitted to the single-chip computer for judgment, so as to determine whether the switching element circuit is working normally. The core component of the detection circuit is the voltage regulator diode. When the voltage output by the rectifier bridge exceeds the working voltage of the voltage regulator diode, the optocoupler is turned on, and the thyristor state detection feedback signal is low level, otherwise it is high level. When the thyristor control circuit is normal, the minimum voltage output by the rectifier bridge circuit is about 224V. When the thyristor control circuit is abnormal, the maximum voltage output by the rectifier bridge circuit is about 129V or 0V. Therefore, the working voltage parameter of the voltage regulator diode is selected to be 180V-200V. When any thyristor of phase A or B is abnormally turned on, the thyristor state check feedback signal is high level. When all thyristors are working normally, the thyristor state check feedback signal is low level, that is, the inspection of the working status of the thyristors in each heating zone is completed.

[0092] The above-mentioned current detection module includes a current sensor, an operational amplifier, an optocoupler, a resistor and a filter capacitor. The circuit is shown in the attached Figure 5. The current sensor samples the C-phase current of each heating zone of blade 1, blade 3 and blade 5, converts it into a voltage signal and amplifies the signal. The voltage comparator is used to compare it with the reference voltage value to determine whether the blade heating element is working normally. The voltage comparator output is converted to a level using an optocoupler to output a blade current check feedback signal. The C-phase current when the blade is heated normally is about 33A, and the C-phase current when the blade heating is disconnected is about 29A or lower. The reference voltage is selected as 11V. When the current is less than 29A, the output voltage of the current sensor is less than 10V, that is, less than the reference voltage. The voltage comparator outputs a low level, the optocoupler is not turned on, and the current check signal is a high level. Otherwise, the current check signal is a low level.

[0093] The aforementioned power supply module can provide about 22.5W of power for a 15V circuit and about 7.5W of power for a 5V circuit, meeting the requirements for normal operation of the subsequent circuit.

[0094] The above fault isolation function is realized by the distributor software. The software flow is shown in the attached Figure 7 , the specific fault judgment includes the following steps.

[0095] Step 1: Power on the power distribution unit and perform a power-on self-test. Perform a self-test on the internal signal processing module and the switch element voltage detection module of the power distribution unit. If the self-test passes, proceed to the next step.

[0096] Step 2: The signal processing module receives the system working status and selects the mode. The working mode is selected as de-icing and heating. At this time, the timing sequence is: 1 group 2 zone → 1 group 3 zone → 1 group 4 zone → 1 group 5 zone → 2 group 2 zone → 2 group 3 zone → 2 group 4 zone → 2 group 5 zone → 3 group 2 zone → 3 group 3 zone → 3 group 4 zone → 3 group 5 zone, 1 group 2 zone → 1 group 3 zone → 1 group 4 zone → 1 group 1 zone → 2 group 2 zone → 2 group 3 zone → 2 group 4 zone → 2 group 1 zone → 3 group 2 zone → 3 group 3 zone → 3 group 4 zone → 3 group 1 zone. The signal processing module outputs high-level control signals of Q1, Q2, Q3, Q4, Q5, R1, R2 and R3 according to this timing sequence to control the switch elements and their control modules to turn on and off to heat the blades.

[0097] Step 3: When the current sequence is in group 1 and zone 3, that is, when the current heating zone information is zone 3 of blade 1 and zone 3 of blade 4, the signal processing module receives a total current value of 62A ≥ total current > 58A, and proceeds to the next step;

[0098] Step 4: The signal processing module receives a current check signal less than 3V and a switch element voltage signal greater than 3V, and proceeds to the next step:

[0099] Step 5: If the current check signal is less than 3V, it means that the current value of blade 1, blade 3 or blade 5 is normal. However, since 62A ≥ total current > 58A, it means that the current value of blade 2, blade 4 or blade 6 is abnormal. The current heating zone is zone 3 of blade 1 and zone 3 of blade 4, which means that the current value of zone 3 of blade 4 is abnormal. Go to the next step.

[0100] Step 6: At this time, if the voltage signal of the switch element is greater than 3V, it means that the working voltage of the switch element in zone 3 of blade 4 is abnormal. The signal processing module determines that the switch element in zone 3 of blade 4 is open circuit, and proceeds to the next step;

[0101] Step 7: The signal processing module determines that the switch element in zone 3 of blade 4 is open circuit, sends a report fault information through the serial port, and performs degraded heating: stops sending timing signals to the switch element in zone 3 of blade 4 and its control module unit, and the signal processing module sets Q1, Q2, Q3, Q4, Q5, R1, R2, and R3 of the switch element in the fault zone and its control module unit to low level, stops heating the switch element in the fault zone and its control module unit, and heats other non-fault zones normally;

[0102] Step 8: Return to Step 2.

Claims

1. A main propeller distributor with fault isolation function, characterized in that: The main propeller distributor includes: a switch element and its control module, a signal processing module, a switch element voltage detection module, a current detection module, and a power supply module; The switch element and its control module are used to control the on and off of the AC power supply of the main blade heating element; The switch element voltage checking module is used to detect the voltage status of all switch elements; The current checking module is used to detect the main propeller heating current state; The signal processing module is connected to the switch element voltage detection module, the heating current detection module, and the power supply module, and is used to determine whether the switch element and its control module are faulty, and to perform fault isolation, fault judgment and reporting after a fault occurs.

2. The main propeller distributor according to claim 1, characterized in that: The switch element and its control module include M*N units, M is the number of blade partitions, N is the number of blades, and each unit includes: a first thyristor, a second thyristor, a first optocoupler, a second optocoupler, a first transistor and a resistor; The anode of the input end of the first optocoupler N2 is connected to the resistor R2, the cathode of the input end of the first optocoupler N2 is connected to the anode of the input end of the second optocoupler N3, the anode of the output end of the first optocoupler N2 is connected to the AC A phase power supply through the resistor R4, and the cathode of the output end of the first optocoupler N2 is connected to the control electrode of the first thyristor A1; The cathode of the input end of the second optical coupler N3 is connected to the collector of the first transistor V1, the anode of the output end of the second optical coupler N3 is connected to the AC B-phase power supply through the resistor R3, and the cathode of the output end of the second optical coupler N3 is connected to the control electrode of the second thyristor B1; The base of the first transistor V1 is connected to the resistor R1, and the emitter of the first transistor V1 is grounded; The anode of the first thyristor A1 is connected to the AC A-phase power supply, the cathode of the first thyristor A1 is connected to the control electrode with a resistor R5, the cathode of the first thyristor A1 is the voltage signal output terminal of the switch element and its control module unit, connected to the switch element voltage inspection module, and the cathode of the first thyristor A1 is also the A-phase power output terminal of the switch element and its control module unit, connected to the heating element; The anode of the second thyristor B1 is connected to the AC B-phase power supply, the cathode of the second thyristor B1 is connected to the control electrode with a resistor R6, the cathode of the second thyristor B1 is the voltage signal output terminal of the switch element and its control module unit, connected to the switch element voltage inspection module, and the cathode of the second thyristor B1 is also the B-phase power output terminal of the switch element and its control module unit, connected to the heating element; The other end of the resistor R2 and the resistor R1 is the control signal input end of the switch element and its control module unit, and is connected to the signal processing module; The C-phase AC power supply and the C-phase heating element input end are the current detection signal output ends of the switch element and its control module unit, and are connected to the current detection module.

3. The main propeller distributor according to claim 2, characterized in that: The switch element voltage detection module includes: a rectifier bridge, a voltage regulator diode, a third optical coupler, a resistor and a filter capacitor; The bridge arm A of the rectifier bridge D1 is connected to each switch element of the N blades and the output end of the A-phase thyristor of the control module unit, and the bridge arm B is connected to each switch element of the N blades and the output end of the B-phase thyristor of the control module unit; A resistor R24 ​​and a capacitor C6 are connected in parallel between the bridge arms C and D of the rectifier bridge D1; One end of the capacitor C6 is connected to the resistor R25 and the cathode of the diode in sequence, the anode of the diode is connected to the anode of the third optocoupler input end, and the other end of the capacitor C6 is connected to the cathode of the third optocoupler input end; The anode of the output end of the third optocoupler N9 is connected to a 5V power supply through a resistor R26, the cathode of the output end of the third optocoupler N9 is grounded, and the anode of the output end of the third optocoupler N9 is connected to the signal processing module as the signal output end of the switching element voltage detection module.

4. The main propeller distributor according to claim 3, characterized in that: The current detection module includes: a current sensor, a first operational amplifier, a second operational amplifier, a fourth optical coupler, a resistor and a filter capacitor; The Iin and Iout terminals of the current sensor N6 are connected to the Iin and Iout terminals of the switch element and its control module unit, the +VS terminal, -VS terminal and GND terminal of the current sensor N6 are connected to the +15V power supply, -15V power supply and ground respectively, and the Vout terminal of the current sensor N6 is connected to the resistor R15; The other end of the resistor R15 is connected to the positive input pin of the first operational amplifier N7A, the resistor R20 is connected between the output end and the negative input end of the first operational amplifier N7A, the resistor R16 is connected between the negative input end of the first operational amplifier N7A and the ground, the positive and negative power supply ends of the first operational amplifier N7A are connected to the +15V power supply and the -15V power supply, and the output end of the first operational amplifier N7A is connected to the negative input end of the second operational amplifier N8A; The positive input terminal of the second operational amplifier N8A is connected to a 11V reference voltage, the positive and negative power supply terminals of the second operational amplifier N8A are connected to a +15V power supply and a -15V power supply, a resistor R21 is connected between the output terminal of the second operational amplifier N8A and the positive power supply terminal, and the output terminal of the second operational amplifier N8A is connected to a resistor R22; The other end of the resistor R22 is connected to the anode of the fourth optocoupler N8 input terminal, the cathode of the fourth optocoupler N8 input terminal is connected to the ground, the anode of the fourth optocoupler N8 output terminal is connected to the 5V power supply through the resistor R23, the cathode of the fourth optocoupler N8 output terminal is grounded, and the anode of the fourth optocoupler N8 output terminal is the signal output terminal of the current detection module, which is connected to the signal processing module.

5. The main propeller distributor according to claim 4, characterized in that: The signal processing module includes: a single chip microcomputer, a first inverter, a second inverter, a crystal oscillator, a second transistor, a third transistor, a fourth transistor, a resistor and a filter capacitor. The connection relationship of the signal processing module is as follows: The P2.3 and P2.4 terminals of the single-chip computer N1 are connected to the output terminals of the switching element voltage detection module and the heating current detection module; The P0.0, P0.1, P0.2, P0.3 and P0.4 terminals of the single-chip microcomputer N1 are connected to the 5V power supply through resistors R7, R8, R9, R10 and R11, the P0.0, P0.1, P0.2, P0.3 and P0.4 terminals of the single-chip microcomputer N1 are connected to the 1A, 2A, 3A, 4A and 5A terminals of the first inverter N5, and the P2.0, P2.1 and P2.2 terminals of the single-chip microcomputer N1 are connected to the 1A, 2A, 3A, 4A and 5A terminals of the second inverter N4. A, 2A and 3A terminals, P3.0 and P3.1 terminals of the single-chip microcomputer N1 are connected to the serial port receiving and serial port sending, the crystal oscillator G1 is connected between the X1 and X2 terminals of the single-chip microcomputer N1, the X1 and X2 terminals of the single-chip microcomputer N1 are grounded through capacitors C1 and C2 respectively, the VCC terminal and EA terminal of the single-chip microcomputer N1 are connected to a 5V power supply, the PSEN terminal and GND terminal of the single-chip microcomputer N1 are grounded, and the VCC terminal of the single-chip microcomputer N1 is grounded through capacitor C3; The VCC terminal of the first inverter N5 is connected to a 5V power supply, the VCC terminal of the first inverter N5 is grounded through a capacitor C7, the GND terminal of the first inverter N5 is grounded, and 1Y, 2Y, 3Y, 4Y and 5Y of the first inverter N5 are output terminals of the signal module, connected to the switch element and its control module; The VCC terminal of the second inverter N4 is connected to a 5V power supply, the VCC terminal of the second inverter N4 is grounded through a capacitor C4, the GND terminal of the second inverter N4 is grounded, 1Y, 2Y and 3Y of the second inverter N4 are connected to the bases of the second triode V2, the third triode V3 and the fourth triode V4 through resistors R12, R13 and R14, the collectors of the second triode V2, the third triode V3 and the fourth triode V4 are connected to a 5V power supply, the emitters of the second triode V2, the third triode V3 and the fourth triode V4 are grounded through resistors R19, R17 and R18, and the emitters of the second triode V2, the third triode V3 and the fourth triode V4 are the output terminals of the signal module, which are connected to the switch element and its control module.

6. A method for isolating a main propeller distributor having a fault isolation function, implemented based on the main propeller distributor according to any one of the preceding claims, characterized in that: The method comprises the following steps: Step 1: Power on and perform self-test. If the self-test fails, a fault will be reported. If it passes, proceed to the next step. Step 2: The signal processing module receives the system working status and selects a mode. The working mode is selected to send a maintenance self-check sequence or a de-icing heating sequence to the switch element and its control module. The above sequence includes the current heating zone information, and controls the switch element to turn on to heat the blades. Step 3: The signal processing module receives the total current value and determines the total current value range: Total current ≥ 70A, go to step 4; 70A>total current>62A, return to step 2; 62A≥Total current>58A, go to step 5; 58A≥total current, go to step 6; Step 4: The signal processing module cuts off the power supply to protect the line, stops working and reports the fault; Step 5: Determine whether the current check signal and the switch element voltage signal exceed their respective set thresholds: If the current check signal exceeds the threshold and the switch element voltage signal exceeds the threshold, proceed to step seven; If the current check signal exceeds the threshold but the switch element voltage signal does not exceed the threshold, proceed to step eight; If the current check signal does not exceed the threshold but the switch element voltage signal exceeds the threshold, proceed to step nine; If the current check signal does not exceed the threshold and the switch element voltage signal does not exceed the threshold, proceed to step ten; Step 6: Determine whether the voltage signal of the switching element exceeds the respective set threshold: When the voltage of the switch element exceeds the set threshold, the process goes to step 11; If the voltage of the switch element does not exceed the set threshold, the process goes to step 12; Step 7: The signal processing module determines whether the switch element of the current heating zone of blade 1, blade 3 or blade 5 is broken according to the current heating zone information, reports the fault and performs degraded heating; Step 8: The signal processing module determines that the blade heating element of the current heating zone of blade 1, blade 3 or blade 5 is broken according to the current heating zone information, reports the fault and performs degraded heating; Step nine: The signal processing module determines whether the switch element of the current heating zone of blade 2, blade 4 or blade 6 is broken according to the current heating zone information, reports the fault and performs degraded heating; Step 10: The signal processing module determines that the blade heating element of the current heating zone of blade 2, blade 4 or blade 6 is broken according to the current heating zone information, reports the fault and performs degraded heating; Step 11: The signal processing module determines that the switch elements of the current heating zones of blades 1 and 4, blades 3 and 6, or blades 5 and 2 are broken according to the current heating zone information, reports the fault and stops heating; Step 12: The signal processing module determines that the blade heating elements of the current heating zones of blades 1 and 4, blades 3 and 6, or blades 5 and 2 are broken according to the current heating zone information, reports the fault and stops heating.

7. The method according to claim 6, characterized in that: In step 4, the specific process is: The signal processing module stops sending timing signals to the switch element and its control module, the signal processing module sets Q1, Q2, Q3, Q4, Q5, R1, R2 and R3 to a low level, the switch element turns off the AC heating power supply and stops working, and the signal processing module reports fault information.

8. The method according to claim 6, characterized in that: In step seven, the specific process is: The signal processing module determines that the switch element of the current heating zone of blade 1, blade 3 or blade 5 is broken, sends a reported fault information through the serial port, and performs degraded heating: stops sending timing signals to the switch element in the faulty zone and its control module unit, the signal processing module sets Q1, Q2, Q3, Q4, Q5, R1, R2 and R3 of the switch element in the faulty zone and its control module unit to a low level, the switch element in the faulty zone and its control module unit stop heating, and other non-faulty zones are heated normally; In step eight, the specific process is: The signal processing module determines that the blade heating element in the current heating zone of blade 1, blade 3 or blade 5 is short-circuited, sends a reported fault information through the serial port, and performs degraded heating: stops sending timing signals to the switch elements in the faulty area and their control module units, the signal processing module sets Q1, Q2, Q3, Q4, Q5, R1, R2 and R3 of the switch elements in the faulty area and their control module units to a low level, the switch elements in the faulty area and their control module units stop heating, and other non-faulty areas heat normally.

9. The method according to claim 6, characterized in that: In step nine, the specific process is: The signal processing module determines that the switch element of the current heating zone of blade 2, blade 4 or blade 6 is broken, sends a reported fault information through the serial port, and performs degraded heating: stops sending timing signals to the switch element in the faulty zone and its control module unit, the signal processing module sets Q1, Q2, Q3, Q4, Q5, R1, R2 and R3 of the switch element in the faulty zone and its control module unit to a low level, the switch element in the faulty zone and its control module unit stop heating, and other non-faulty zones are heated normally; In step 10, the specific process is: The signal processing module determines that the blade heating element in the current heating zone of blade 2, blade 4 or blade 6 is short-circuited, sends a reported fault information through the serial port, and performs degraded heating: stops sending timing signals to the switch elements in the faulty area and their control module units, the signal processing module sets Q1, Q2, Q3, Q4, Q5, R1, R2 and R3 of the switch elements in the faulty area and their control module units to a low level, the switch elements in the faulty area and their control module units stop heating, and other non-faulty areas are heated normally.

10. The method according to claim 6, characterized in that: In step 11, the specific process is: The signal processing module determines that the switch elements of the current heating zone of blades 1 and 4, blades 3 and 6, or blades 5 and 2 are broken, the signal processing module sets Q1, Q2, Q3, Q4, Q5, R1, R2 and R3 to low level, the switch elements turn off the AC heating power supply, stop working, and the signal processing module reports fault information; In step 12, the specific process is: The signal processing module determines that the blade heating element in the current heating zone of blades 1 and 4 or blades 3 and 6 or blades 5 and 2 is short-circuited, the signal processing module sets Q1, Q2, Q3, Q4, Q5, R1, R2 and R3 to a low level, the switching element turns off the AC heating power supply and stops working, and the signal processing module reports fault information.

Images