Windscreen wiper control system and method for helicopter and helicopter

Abstract

The invention relates to the technical field of helicopter windshield wiper systems, and discloses a windshield wiper control system and method for a helicopter and the helicopter, and the system comprises a collection module which is used for obtaining environment data and sending the environment data to a control module; the control module is used for determining a driving signal or a second control signal according to the environment data or the first control signal and sending the driving signal or the second control signal to the windshield wiper module and / or the heating module; the windshield wiper module is used for adjusting the swinging of a windshield wiper according to the driving signal; and the heating module is used for adjusting the temperature of the windshield according to the second control signal. The control module sends the control signal to control the windshield wiper module and / or the heating module according to the environment data acquired by the acquisition module, the windshield wiper and heating can be automatically controlled according to the environment data at the same time, sudden manual forced high-power heating of the windshield is avoided, and therefore the safety is improved.

Description

Technical Field

[0001] The present application relates to the technical field of helicopter windshield wiper systems, and in particular to a windshield wiper control system, method and helicopter for a helicopter. Background Art

[0002] At present, the helicopter windshield wiper system and heating system belong to two different control systems, provided by two different manufacturers. In addition, the helicopter windshield anti-icing, defogging and wiper systems require the pilot to self-judge the windshield fogging, icing and water droplets, and then manually turn on the anti-icing, defogging and wiper functions on the operating buttons. However, when the helicopter suddenly encounters extreme weather, if the pilot suddenly manually forces the windshield to be heated at high power, it is easy to cause the onboard power supply to suddenly overload, thus affecting flight safety.

[0003] In summary, it is necessary to provide a windshield wiper control system, method and helicopter for a helicopter that can automatically control windshield wipers and heat with high safety. Summary of the invention

[0004] To solve the above problems, the present application proposes a windshield wiper control system, method and helicopter for a helicopter.

[0005] On the one hand, the present application proposes a windshield wiper control system for a helicopter, comprising:

[0006] The acquisition module is used to obtain environmental data and send it to the control module;

[0007] a control module, configured to determine a drive signal or a second control signal according to the environmental data or the first control signal and send the drive signal or the second control signal to the windshield wiper module and / or the heating module;

[0008] a windshield wiper module, used for adjusting the swing of the windshield wiper according to the driving signal;

[0009] A heating module is used to adjust the temperature of the windshield according to the second control signal.

[0010] Preferably, the control module comprises:

[0011] A signal conversion unit, used for converting the received current signal of the environmental data into a voltage signal or a digital signal and sending it to the control unit;

[0012] a control unit, configured to generate the second control signal according to a speed feedback signal, the first control signal, the voltage signal or the digital signal;

[0013] An interface unit, used for inputting a first control signal and sending the first control signal to the control unit or the motor drive unit;

[0014] The motor drive unit is used to determine the drive signal according to the first control signal and / or the second control signal; and to determine the speed feedback signal according to the swing speed of the windshield wiper module.

[0015] Preferably,

[0016] The interface unit is connected to the control unit and the motor drive unit respectively; or

[0017] The control unit is connected to the interface unit and the motor drive unit respectively.

[0018] Preferably, the motor drive unit comprises:

[0019] a driving subunit, configured to determine the driving signal according to a reset signal, the first control signal and / or the second control signal;

[0020] A speed regulating subunit, used for obtaining the swing speed of the windshield wiper module and determining the speed feedback signal;

[0021] The reset subunit is used to output the reset signal.

[0022] Preferably, the speed adjustment subunit comprises:

[0023] A Hall sensor, used to determine a feedback voltage signal according to a motor current of the windshield wiper module;

[0024] The speed regulator is used to determine a speed feedback signal according to the feedback voltage signal.

[0025] Preferably, the acquisition module includes:

[0026] A wind speed acquisition unit, used to obtain the wind speed signal outside the windshield and send it to the control module;

[0027] A humidity collection unit, used to obtain a humidity signal outside the windshield and send it to the control module;

[0028] A raindrop unit, used to obtain a raindrop signal outside the windshield and send it to the control module;

[0029] A first temperature acquisition unit, used to acquire a first temperature signal outside the windshield and send it to the control module;

[0030] The second temperature acquisition unit is used to obtain a second temperature signal inside the windshield and send it to the heating module.

[0031] Preferably, the windshield wiper module comprises:

[0032] A power unit, used for converting the driving signal into a power signal;

[0033] a motor unit, configured to change a rotation speed according to the power signal;

[0034] A speed reduction unit, used to adjust the rotation speed to obtain an adjusted rotation speed;

[0035] The wiper unit is configured to oscillate according to the adjusted rotation speed.

[0036] Preferably, the heating module comprises:

[0037] A current acquisition unit, used to output a voltage to the heating unit; convert the second temperature signal into a voltage signal;

[0038] A heating unit is used to adjust the temperature of the windshield according to the voltage.

[0039] In a second aspect, the present application proposes a windshield wiper control method for a helicopter, comprising:

[0040] The acquisition module obtains environmental data and sends it to the control module;

[0041] The control module determines a driving signal or a second control signal according to the environmental data or the first control signal and sends it to the windshield wiper module and / or the heating module;

[0042] The windshield wiper module adjusts the windshield wiper swing according to the driving signal;

[0043] The heating module adjusts the temperature of the windshield according to the second control signal

[0044] In a third aspect, the present application proposes a helicopter, comprising: a windshield wiper control system for a helicopter as described in any one of the first aspects.

[0045] The advantages of the present application are that the control module sends a control signal to control the windshield wiper module and / or the heating module according to the environmental data obtained by the acquisition module, and can simultaneously and automatically control the windshield wiper and heating according to the environmental data, avoiding sudden manual forced high-power heating of the windshield, thereby improving safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] By reading the detailed description of the preferred embodiment below, various other advantages and benefits will become clear to those of ordinary skill in the art. The accompanying drawings are only used for the purpose of illustrating the preferred embodiment and are not to be considered as limiting the present application. Moreover, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0047] Figure 1 It is a structural schematic diagram of an existing windshield wiper device for a helicopter;

[0048] Figure 2 It is a schematic diagram of the position of a windshield wiper device of an existing helicopter;

[0049] Figure 3 It is a schematic diagram of an existing windshield wiper hardware system of a helicopter;

[0050] Figure 4 It is a schematic diagram of the windshield wiper hardware system of another existing helicopter;

[0051] Figure 5 It is a schematic diagram of the location of a windshield heating control box of an existing helicopter;

[0052] Figure 6 It is a schematic diagram of an existing windshield heating control system for a helicopter;

[0053] Figure 7 is a schematic diagram of a windshield wiper control system for a helicopter provided by the present application;

[0054] Figure 8 is a schematic diagram of a control module of a windshield wiper control system for a helicopter provided by the present application;

[0055] Fig. 9 is a schematic diagram of a motor drive unit for a windshield wiper control method for a helicopter provided in the present application;

[0056] Fig.10 is a schematic diagram of a speed regulating subunit 242 of a windshield wiper control method for a helicopter provided by the present application;

[0057] Fig.11 It is a schematic diagram of a collection module for a windshield wiper control system of a helicopter provided by the present application;

[0058] Fig.12 It is a schematic diagram of the positions of a wind speed collection unit and a first temperature collection unit of a windshield wiper control system for a helicopter provided by the present application;

[0059] Fig.13 It is a schematic diagram of the working principle of a raindrop unit of a windshield wiper control system for a helicopter provided by the present application;

[0060] Fig.14 is a schematic diagram of a windshield wiper module of a windshield wiper control system for a helicopter provided by the present application;

[0061] Fig.15 is a schematic diagram of a heating module for a windshield wiper control system of a helicopter provided by the present application;

[0062] Fig.16is a schematic diagram of a first control scheme of a windshield wiper control system for a helicopter provided by the present application;

[0063] Fig.17 is a schematic diagram of a second control scheme of a windshield wiper control system for a helicopter provided by the present application;

[0064] Fig.18 It is a schematic diagram of a windshield wiper control method for a helicopter provided in the present application. DETAILED DESCRIPTION

[0065] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0066] like Figure 1 FIG. 1 is a schematic diagram of the structure of an existing windshield wiper device for a helicopter. Figure 2 The figure shows the position diagram of an existing windshield wiper device for a helicopter. Among them, a is a reducer assembly, b is a flexible shaft assembly, c is a motor assembly, d is a brush assembly, and e is a brush arm assembly. Among them, the motor assembly c and the flexible shaft assembly b have aviation sockets on the left and right inside the cabin to connect to the outside; the reducer assembly a, the brush arm assembly e, and the brush assembly d are connected to the internal components outside the cabin with aviation plugs.

[0067] like Figure 3 As shown in FIG. 1 , it is a schematic diagram of an existing windshield wiper hardware system of a helicopter (without a single-chip microcomputer). Figure 3 As shown, the speed control switch on the host machine sets the "speed control command", 28V DC voltage (V DC ), GND (ground) input windshield wiper motor driver. Among them, the windshield wiper hardware group mainly includes: motor driver, power MOSFET, Hall reset switch, speed regulator and DC brushless motor. The windshield wiper hardware group is installed in Figure 1 The position of the motor assembly c is shown.

[0068] like Figure 4 As shown in FIG. 1 , it is a schematic diagram of another existing windshield wiper hardware system of a helicopter (with a single-chip microcomputer). Figure 4As shown in the figure, if the helicopter windshield system has relatively high requirements for the function and control accuracy of the wiper motor, it is necessary to add a single-chip microcomputer to collect feedback information such as motor speed and working current. After processing these feedback information, the motor driver is further adjusted to achieve closed-loop control and improve control accuracy. The single-chip microcomputer mainly receives speed control instructions, 28V DC voltage (V DC ), ground signal (GND), reset signal, speed feedback signal, etc.; the microcontroller transmits drive instructions, 28V, current signal, ground signal 28V to the motor driver.

[0069] The current helicopter windshield wiper hardware group (system) is an independent control box connected to the speed switch (host interface), and the wiper motor (brushless DC motor) and the windshield wiper hardware group are divided into two boxes. The helicopter windshield wiper hardware group and the brushless DC motor are installed together, such as Figure 1 The position shown in c.

[0070] like Figure 5 The figure shows the location of the windshield heating control box of an existing helicopter. Among them, position 1 is the installation location of the windshield heating control box. The heating control box (windshield heating control box) has an aviation socket, and the left and right windshields have aviation plugs to connect the heating control box. By comparing the attached Figure 5 and attached Figure 2 It can be found that the control box of the windshield wiper system and the windshield heating control box are installed in close positions on the helicopter.

[0071] like Figure 6 The figure shows a schematic diagram of an existing windshield heating control system for a helicopter. The host interface transmits control commands, 28V DC voltage, alarm signals, and 115V AC voltage to the windshield heating control box. The single-chip microcomputer in the control circuit board is responsible for processing alarm signals, control commands, digital signals, etc. The single-chip microcomputer has the same function as the single-chip microcomputer in the windshield wiper system.

[0072] Currently, the helicopter windshield wiper system and heating system belong to two different control systems, provided by two different manufacturers. However, each system on the helicopter has strict requirements and controls on weight at the beginning of design. Installing the two control systems separately on the aircraft increases the weight of the windshield system. In addition, the current helicopter windshield anti-icing, defogging and wiper systems require the pilot to judge the fogging, icing and water droplets on the windshield by himself, and then manually turn on the anti-icing, defogging and wiper functions on the operating buttons, which will distract the pilot's attention and affect flight safety.

[0073] To solve the above problems, the embodiments of the present application provide a windshield wiper control system for a helicopter, such as Figure 7 As shown, including:

[0074] The acquisition module 100 is used to acquire environmental data and send it to the control module 200;

[0075] A control module 200, for determining a drive signal or a second control signal according to environmental data or a first control signal and sending the drive signal or the second control signal to a windshield wiper module and / or a heating module;

[0076] A windshield wiper module 300, for adjusting the swing of the windshield wiper according to the driving signal;

[0077] The heating module 400 is used to adjust the temperature of the windshield according to the second control signal.

[0078] The control signal includes the control signal generated by the driver, operator, tester, etc. through active control through buttons and keys.

[0079] like Figure 8 As shown, the control module 200 includes: a signal conversion unit 201, used to convert the current signal of the received environmental data into a voltage signal or a digital signal and send it to the control unit 202; the control unit 202, used to generate a second control signal according to the speed feedback signal, the first control signal, the voltage signal or the digital signal; an interface unit 203, used to input the first control signal and send the first control signal to the control unit 202 or the motor drive unit 204; the motor drive unit 204, used to determine the drive signal according to the first control signal and / or the second control signal; determine the speed feedback signal according to the swing speed of the windshield wiper module 300.

[0080] The signal conversion unit 201 includes: a power supply circuit board 211. The power supply circuit board also transmits the voltage signal of the received temperature data to the control unit 202, and outputs the voltage required for heating the heating module 400 to the heating module 400 to change the temperature of the heating module 400. The interface unit 203 includes a host interface, the host interface includes an onboard power supply, and a control button that the pilot needs to use, or the host interface is connected to the onboard power supply and the control button that the pilot needs to use. The first control signal and the second control signal both include a variety of control signals for controlling different modules or units. The first control signal is a control signal generated when a pilot or an operator operates the system by pressing a button or the like to control the windshield wiper module 300 and / or the heating module 400. The second signal is a control signal generated by the single chip microcomputer according to the speed feedback signal, the first control signal, the voltage signal or the digital signal for controlling the windshield wiper module 300 and the heating module 400. The control unit 202 includes a single chip microcomputer or a control circuit board.

[0081] The interface unit 203 is further configured to input the power supply voltage to the control unit 202 .

[0082] The control unit 202 is further configured to determine the distribution of the power supply voltage according to the second control signal, wherein the power supply includes an onboard power supply.

[0083] The interface unit 203 is connected to the control unit 202 and the motor drive unit 204 respectively; or

[0084] The control unit 202 is connected to the interface unit 203 and the motor drive unit 204 respectively.

[0085] Among them, the connection between the interface unit 203, the control unit 202 and the motor drive unit 204 includes two modes. The connection mode in which the interface unit 203 is respectively connected to the control unit 202 and the motor drive unit 204 is to directly control the heating module 400 through the control unit 202, and the second control signal generated by the control unit 202 is sent to the motor drive unit 204 through the interface unit 203; and the connection mode in which the control unit 202 is respectively connected to the interface unit 203 and the motor drive unit 204 is to directly control the heating module 400 and the windshield wiper module 300 through the control unit 202, so as to realize precise control of the heating module 400 and the windshield wiper module 300.

[0086] like Fig. 9 As shown, the motor drive unit 204 includes: a drive subunit 241, used to determine the drive signal according to the reset signal, the first control signal and / or the second control signal; a speed adjustment subunit 242, used to obtain the swing speed of the windshield wiper module 300 and determine the speed feedback signal; a reset subunit 243, used to output a reset signal.

[0087] The driving signal is a pulse width modulation (PWM) signal. The reset subunit 243 includes a Hall sensor reset switch; and the driving subunit 241 includes a motor driver.

[0088] like Fig.10 As shown, the speed regulating subunit 242 includes: a Hall sensor 2421, which is used to determine a feedback voltage signal according to the motor current of the windshield wiper module 300; and a speed regulator 2422, which is used to determine a speed feedback signal according to the feedback voltage signal.

[0089] One end of the Hall sensor 2421 is connected to the speed regulator 2422, and the other end is connected to the windshield wiper module 300. When the interface unit 203 is connected to the control unit 202 and the motor drive unit 204 respectively, the motor drive subunit 241 is connected to the interface unit 203, the speed regulation subunit 242 and the reset subunit 243 are both connected to the drive subunit 241, and the speed feedback signal and the reset signal output by the speed regulation subunit 242 and the reset subunit 243 are directly sent to the drive subunit 241. When the control unit 202 is respectively connected to the interface unit 203 and the motor drive unit 204, the control unit 202 is respectively connected to the driving subunit 241, the speed adjustment subunit 242 and the reset subunit 243, the speed feedback signal and the reset signal output by the speed adjustment subunit 242 and the reset subunit 243 are directly sent to the control unit 202, the control unit 202 generates a second control signal according to the speed feedback signal, and sends it to the driving subunit 241, and the control unit 202 directly sends the received reset signal to the driving subunit 241.

[0090] like Fig.11 As shown, the acquisition module 100 includes: a wind speed acquisition unit 101, used to obtain the wind speed signal outside the windshield and send it to the control module 200; a humidity acquisition unit 102, used to obtain the humidity signal outside the windshield and send it to the control module 200; a raindrop unit 103, used to obtain the raindrop signal outside the windshield and send it to the control module 200; a first temperature acquisition unit 104, used to obtain the first temperature signal outside the windshield and send it to the control module 200; a second temperature acquisition unit 105, used to obtain the second temperature signal inside the windshield and send it to the heating module 400.

[0091] Among them, the wind speed collection unit 101 includes a wind speed sensor; the humidity collection unit 102 includes a humidity sensor; the raindrop unit 103 includes an infrared raindrop sensor; the first temperature collection unit 104 includes a temperature sensor arranged outside the windshield (outside the helicopter); the second temperature collection unit 105 includes a temperature sensor arranged inside the windshield (inside the helicopter, such as the cockpit).

[0092] like Fig.12 As shown, it is a schematic diagram of the positions of the wind speed collection unit 101 and the first temperature collection unit 104. Among them, the position 2 in the middle of the two windshields is the position of the windshield temperature and humidity sensor and the wind speed sensor, which can more accurately capture the real-time situation of the environment outside the windshield, and the humidity collection unit 102 can also be placed in position 2; the position 3 in the middle of the top of the windshield is the position of the raindrop unit 103, at which the entire windshield surface can be infrared scanned.

[0093] like Fig.13As shown, it is a schematic diagram of the working principle of the raindrop unit 103. The raindrop unit 103 includes an infrared raindrop sensor. Among them, the infrared LED of the infrared raindrop sensor shines the light source onto the glass surface, and the photodiode receives the corresponding refracted light source. If there are water droplets on the glass surface, the water droplets will refract a part of the light source, and the light source received by the photodiode will be reduced, and the current output by the photodiode will be reduced. The current is transmitted to the control unit 202 through the power circuit board of the signal conversion unit 201, and the control unit 202 generates a corresponding second control signal and sends it to the motor drive unit 204, thereby triggering the wiper to work. The wiper will not stop working until the photodiode receives enough light source and the output current reaches the preset raindrop threshold.

[0094] The raindrop unit 103 automatically turns on the wiper function according to the rain condition on the windshield surface, thereby avoiding the pilot's time in searching for the wiper control button in case of sudden rainfall, and improving flight safety.

[0095] like Fig.14 As shown, the windshield wiper module 300 includes: a power unit 301, used to convert a drive signal into a power signal; a motor unit 302, used to change the rotation speed according to the power signal; a deceleration unit 303, used to adjust the rotation speed to obtain an adjusted rotation speed; and a wiper unit 304, used to swing according to the adjusted rotation speed.

[0096] The power unit 301 includes: a power MOS tube; the motor unit 302 includes a brushless motor, such as a DC brushless motor; the reduction unit 303 includes a left reducer and a right reducer; the wiper unit 304 includes a left brush arm, a right brush arm, a left brush sheet and a right brush sheet of a windshield wiper, etc. The motor unit 302 is also connected to the Hall sensor 2421.

[0097] like Fig.15 As shown, the heating module 400 includes: a current acquisition unit 401, which is used to output a voltage to a heating unit; convert the second temperature signal into a voltage signal; and a heating unit 402, which is used to adjust the temperature of the windshield according to the voltage.

[0098] The voltage signal may be sent to the control unit 202 via the power circuit board, and the control unit 202 performs temperature comparison based on the voltage signal and the first temperature signal to generate a second control signal for controlling temperature changes.

[0099] The current collection unit 401 includes a current collection circuit board, and the heating unit 402 includes an electric heating conductive film. The current collection circuit board receives the voltage output by the power supply circuit board, and outputs a current or voltage for controlling the temperature of the heating unit 402 according to the voltage.

[0100] The following is a further description of the embodiments of the present application.

[0101] When a helicopter is in flight, the outer surface of the windshield will freeze due to the impact of cold water droplets in a low-temperature environment, and fog will form once the temperature of the inner surface of the windshield is lower than the dew point of the cabin. In particular, supercooled water droplets (supercooled water, in simple terms, is water that remains liquid below 0°C due to lack of condensation nuclei or other reasons) will partially freeze when they hit the windward surface of the windshield, and the latent heat of phase change released during freezing will increase the surface temperature of the ice layer, which will further accelerate the speed of freezing. Once the aircraft windshield encounters supercooled water droplets, ice may quickly condense on the windward surface.

[0102] In the implementation manner of the present application, the windshield wiper module 300, the signal conversion unit 201, the current acquisition unit 401 and the control unit 202 can be combined into one control box through two different control schemes according to actual needs.

[0103] Among them, the first control scheme is a scheme in which the control unit 202 is respectively connected to the interface unit 203 and the motor drive unit 204. The first control scheme combines the windshield wiper module 300, the signal conversion unit 201, the current acquisition unit 401 and the control unit 202 in one control box, and controls the windshield wiper module 300 and the heating module 400 simultaneously through one control unit 202, that is, the windshield wiper module 300 and the heating module 400 share one single-chip microcomputer or one control circuit board.

[0104] like Fig.16 As shown, the first temperature acquisition unit 104, the second temperature acquisition unit 105, the humidity acquisition unit 102, the wind speed acquisition unit 101 and the raindrop unit 103 transmit the collected external signals (such as wind speed signal, humidity signal, raindrop signal, first temperature signal and second temperature signal) to the signal conversion unit 201 in the form of feedback current magnitude, and the signal conversion unit 201 transmits the current in the form of voltage or digital signal to the control unit 202. The control unit 202 identifies the temperature, humidity, wind speed outside the cabin and compares them with the temperature inside the windshield, and automatically determines whether the windshield will be fogged or frozen. According to the judgment result, if it is determined that heating is required, the second control signal (digital signal) is output to the interface unit 203 and the signal conversion unit 201, and different voltages are distributed from the onboard power supply to the current acquisition unit 401 through the interface unit 203, so as to control the heating unit 402 to perform different degrees of heating function.

[0105] The following description is made by taking the control unit 202 including a single chip microcomputer, the signal conversion unit 201 including a power supply circuit board, the current acquisition unit 401 including a current acquisition circuit board, the heating unit 402 including an electric heating conductive film, and the driving subunit 241 including a motor driver as an example.

[0106] The single chip microcomputer runs on 28V DC output by the onboard power supply, and the heating unit 402 for electrically heating the windshield runs on 115VAC / 400Hz output by the onboard power supply. The power supply circuit board transmits the voltage output by the onboard power supply to the current collection circuit board, and the current collection circuit board transmits the voltage to the electrically heated conductive film to realize the function of heating the windshield.

[0107] The raindrop sensor in the raindrop unit 103 sends the current signal transmitted by the photodiode (the output current needs to reach the preset raindrop threshold to approximately indicate that there are no water droplets on the windshield surface) to the single-chip microcomputer for analysis. The single-chip microcomputer automatically analyzes the water drop situation on the windshield surface. If the output current is lower than the current corresponding to the preset raindrop threshold, the drive instruction is used as the second control signal and sent to the motor driver in the form of a current signal.

[0108] The first control scheme is the control scheme of the control unit 202, that is, the motor driver is controlled by a single-chip microcomputer through a combination of software and hardware to achieve motor drive, and the single-chip microcomputer processes the collected feedback information such as motor speed and working current and further adjusts the motor driver to achieve closed-loop control.

[0109] The single-chip computer (based on the size of the photodiode current, the smaller the current, the more raindrops there are on the windshield surface) judges by itself or selects the speed gear of the wiper based on the first control signal transmitted from the host interface of the interface unit 203, and outputs the driving signal (PWM speed regulation signal) corresponding to the corresponding gear to the driving sub-unit 241, and adjusts and controls the operating speed of the motor unit 302 by changing the frequency, pulse width and voltage of the driving signal, thereby driving the wiper arm to drive the wiper blade to wipe the rain on the windshield (windshield), and controls the master and slave windshield wipers to cooperate precisely and synchronously in the synchronous working mode.

[0110] The operating voltage of the motor driver of the driving subunit 241 is consistent with that of the single-chip microcomputer, which is 28V DC.

[0111] The Hall sensor 2421 determines the wiper position according to the current of the brushless motor in the motor unit 302, and outputs the corresponding voltage as a speed feedback signal to the speed regulator 2422. The single chip determines the second control signal for adjusting the wiper speed according to the speed feedback signal fed back by the speed regulator 2422 and outputs it to the motor driver.

[0112] The pilot (driver) can also judge the phenomena such as fogging, ice and rain by himself, operate the pilot control button of the host interface, and output the first control signal to the single chip microcomputer, so as to directly control the wiping function of the windshield wiper module 300 and the windshield heating function of the heating module 400.

[0113] By combining the two controller hardware parts with basically the same power supply system and control signal mode in the aircraft windshield heating (heating module 400) and the wiper controller (windshield wiper module 300) into one, and using only one control module 200 for control, the use of electronic components and aviation wires on the aircraft can be reduced, and the weight of the metal casing of a controller can also be reduced.

[0114] like Fig.17 As shown, the second control scheme is a scheme in which the interface unit 203 is connected to the control unit 202 and the motor drive unit 204 respectively. In this scheme, the windshield wiper hardware group (excluding the single-chip microcomputer) and the brushless motor and heating control box are combined into one control box, but the heating module 400 is only controlled by the control unit 202, and the windshield wiper module 300 is controlled and feedback controlled by the motor drive unit 204. The heating module 400 is directly controlled by the control unit 202, and the control of the motor drive unit 204 is controlled by sending a second control signal through the control unit 202 to the motor drive unit 204 through the interface unit 203, or directly sending a first control signal to the motor drive unit 204 through the interface unit 203. However, the feedback control of the electrode drive unit is directly feedback controlled through the speed adjustment subunit 242 connected thereto.

[0115] If there is enough space on the aircraft, the motor unit 302, such as a brushless motor, can be placed outside the control box, thereby reducing the impact of the heat generated by the motor unit 302 when it is working on the components in the control module 200 and the acquisition module 100. An aviation output socket can be added to the two aviation output sockets of the original windshield heating control box to connect the wiper control system or the windshield wiper module 300. If the motor unit 302, such as a brushless motor group, is outside the control box, the aviation output socket can be installed on the motor unit 302.

[0116] The infrared raindrop sensor in the raindrop unit 103 transmits the raindrop signal to the control unit 202 inside the heating control box, and the control unit 202 transmits the second control instruction to the driving subunit 241 through the interface unit 203 .

[0117] If the pilot manually operates the windshield wiper and heating functions, the automatic mode will be cut off and the pilot's operation will be executed instead. The first control signal generated according to the pilot's control operation is received through the interface unit 203, and the first control signal is sent to the control unit 202 or the motor drive unit 204, thereby realizing the control of the windshield wiper module 300 and the heating module 400.

[0118] The basic control logic and signal transmission of the second control scheme are consistent with those of the first control scheme.

[0119] If you are worried about the windshield system overheating during operation, you can use the second control solution. Since the second control solution connects the motor drive unit 204 and the control unit 202 respectively through the interface unit 203, the wiper motor system (motor drive unit 204 and windshield wiper module 300) and the control unit 202 are not in the same control box, which can effectively reduce the heat generated when working at the same time.

[0120] If the function and control accuracy requirements of the motor unit 302 of the windshield wiper module 300 are relatively high, the first control scheme can be used. The control unit 202 of the first control scheme obtains feedback information such as the motor speed and working current of the motor unit 302 through the speed adjustment subunit 242, and uses it to further adjust the drive unit after processing to achieve more accurate closed-loop control.

[0121] The first control scheme combines the above advantages, so that the heating module 400 and the motor module use the same control unit 202, thereby realizing that the windshield wiper system and the heating control box share the same single-chip microcomputer (the remaining functions of the single-chip microcomputer in the windshield heating control box are currently sufficient to process the wiper control signal). The windshield wiper hardware group and the heating control box hardware are combined into one control box and the same control unit 202 is used, which can reduce the weight of one control box and the weight of one control unit 202 and its circuit, reduce the number of components inside the aircraft, and take into account the requirements of the wiper motor function and control accuracy. In addition, only one control unit 202 is used to control the motor drive unit 204, the heating module 400 and the windshield wiper module 300, so that a single manufacturer can provide supporting services for the entire windshield wiper control system, thereby improving the overall reliability and stability of the system.

[0122] Second, as Fig.18 As shown, according to the implementation of the present application, a windshield wiper control method for a helicopter is also proposed, comprising:

[0123] S101, the acquisition module acquires environmental data and sends it to the control module;

[0124] S102, the control module determines a driving signal or a second control signal according to the environmental data or the first control signal and sends it to the windshield wiper module and / or the heating module;

[0125] S103, the windshield wiper module adjusts the windshield wiper swing according to the driving signal;

[0126] S104: The heating module adjusts the temperature of the windshield according to the second control signal.

[0127] In a third aspect, according to an implementation of the present application, a helicopter is also proposed, comprising: a windshield wiper control system for a helicopter as described in any one of the first aspects.

[0128] In the embodiment of the present application, a control module is used to control the windshield wiper module and the heating module, so that the windshield heating control box and the windshield wiper control box are combined together to reduce the weight of a controller; in addition, the windshield wiper module and the heating module share a control unit in a control module, which can also reduce the use of components, effectively reduce the weight of the windshield wiper system, and improve the stability of the windshield wiper system. Only one control unit is used to control the motor drive unit 204, the heating module and the windshield wiper module, and a single manufacturer can provide supporting services for the entire windshield wiper control system, thereby improving the overall reliability and stability of the system. A temperature and humidity, wind speed, and infrared raindrop sensor is installed on the outer frame of the helicopter windshield, which can transmit the outer temperature, humidity, wind speed, and rainfall conditions on the windshield surface to the control box in real time for comparison with the internal temperature of the windshield. If the fogging and icing conditions are met, the windshield control box automatically allocates appropriate power for heating in advance according to the load conditions of the onboard power supply. This reduces the risk of the pilot manually forcing the windshield to heat up at high power when the helicopter encounters extreme weather, which causes the onboard power supply to be suddenly overloaded, thereby improving flight safety. Adding a collection module on the outside of the windshield frame can automatically determine whether automatic heating and the wiper are required, which can reduce the pilot's operation time in fog, ice, and rain, and can also allocate the onboard power supply load in advance, thereby improving flight safety.

[0129] The above is only a preferred specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A windshield wiper control system for a helicopter, characterized in that: include: The acquisition module is used to obtain environmental data and send it to the control module; a control module, configured to determine a drive signal or a second control signal according to the environmental data or the first control signal and send the drive signal or the second control signal to the windshield wiper module and / or the heating module; a windshield wiper module, used for adjusting the swing of the windshield wiper according to the driving signal; A heating module is used to adjust the temperature of the windshield according to the second control signal.

2. The windshield wiper control system according to claim 1, characterized in that: The control module comprises: A signal conversion unit, used for converting the received current signal of the environmental data into a voltage signal or a digital signal and sending it to the control unit; a control unit, configured to generate the second control signal according to a speed feedback signal, the first control signal, the voltage signal or the digital signal; An interface unit, used for inputting a first control signal and sending the first control signal to the control unit or the motor drive unit; The motor drive unit is used to determine the drive signal according to the first control signal and / or the second control signal; and to determine the speed feedback signal according to the swing speed of the windshield wiper module.

3. The windshield wiper control system according to claim 2, characterized in that: The interface unit is connected to the control unit and the motor drive unit respectively; or The control unit is connected to the interface unit and the motor drive unit respectively.

4. The windshield wiper control system according to claim 3, characterized in that: The motor drive unit comprises: a driving subunit, configured to determine the driving signal according to a reset signal, the first control signal and / or the second control signal; A speed regulating subunit, used for obtaining the swing speed of the windshield wiper module and determining the speed feedback signal; The reset subunit is used to output the reset signal.

5. The windshield wiper control system according to claim 4, characterized in that: The speed adjustment subunit comprises: A Hall sensor, used to determine a feedback voltage signal according to a motor current of the windshield wiper module; The speed regulator is used to determine a speed feedback signal according to the feedback voltage signal.

6. The windshield wiper control system according to claim 1, characterized in that: The acquisition module comprises: A wind speed acquisition unit, used to obtain the wind speed signal outside the windshield and send it to the control module; A humidity collection unit, used to obtain a humidity signal outside the windshield and send it to the control module; A raindrop unit, used to obtain a raindrop signal outside the windshield and send it to the control module; A first temperature acquisition unit, used to acquire a first temperature signal outside the windshield and send it to the control module; The second temperature acquisition unit is used to obtain a second temperature signal inside the windshield and send it to the heating module.

7. The windshield wiper control system according to claim 1, characterized in that: The windshield wiper module comprises: A power unit, used for converting the driving signal into a power signal; a motor unit, configured to change a rotation speed according to the power signal; A speed reduction unit, used to adjust the rotation speed to obtain an adjusted rotation speed; The wiper unit is configured to oscillate according to the adjusted rotation speed.

8. The windshield wiper control system according to claim 6, characterized in that: The heating module comprises: A current acquisition unit, used to output a voltage to the heating unit; convert the second temperature signal into a voltage signal; A heating unit is used to adjust the temperature of the windshield according to the voltage.

9. A windshield wiper control method for a helicopter, characterized in that: include: The acquisition module obtains environmental data and sends it to the control module; The control module determines a driving signal or a second control signal according to the environmental data or the first control signal and sends it to the windshield wiper module and / or the heating module; The windshield wiper module adjusts the windshield wiper swing according to the driving signal; The heating module adjusts the temperature of the windshield according to the second control signal.

10. A helicopter, characterized by comprising a windshield wiper control system for a helicopter according to any one of claims 1 to 8.

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