Wing deicing control device

Abstract

The invention provides a wing deicing control device, which relates to the field of airplane wing deicing, and comprises a closed control box formed by connecting a box body assembly and a box cover, an electrical interface is arranged on the box body, and a control circuit is arranged in the box body; the circuit comprises a relay driving and switching circuit which is used for receiving an external heating control signal and independently controlling the on-off of at least one DC 270V heating power supply relay and at least one DC 28V heating power supply relay; the current monitoring circuit is used for collecting the working current of the DC 28V heating power supply loop and converting the current into a voltage signal; and the current signal processing circuit is used for comparing the voltage signal with a preset reference voltage threshold value and outputting a discrete magnitude signal representing a heating working state according to a comparison result. Relay on-off control and state monitoring functions are integrated, the working current of a key heating loop is monitored in real time, the heating state is fed back to the upper computer, and closed-loop monitoring is achieved.

Description

Technical Field

[0001] This invention relates to the field of aircraft wing de-icing technology, and more specifically to a wing de-icing control device. Background Technology

[0002] When aircraft fly at high altitudes or under specific weather conditions, the surfaces of critical components such as wings and pitot tubes are prone to icing, seriously affecting flight safety. Wing de-icing control devices are used to control the on / off switching of heating power when aircraft wings are icy. Traditional wing de-icing control devices typically only have a single control function: receiving control signals and driving relays to switch heating power on and off. They control the relays to switch the output heating power when a heating control signal is input to the host computer, but lack the function of feeding back the heating status to the host computer. This prevents the host computer or pilot from obtaining real-time and accurate information about the actual working status of the heating actuators, hindering system status monitoring and fault diagnosis, and reducing the reliability and maintainability of the entire de-icing system. Summary of the Invention

[0003] In view of this, the present application provides a wing de-icing control device with high integration, high reliability and real-time feedback function of heating status. The device integrates relay on / off control and status monitoring functions to monitor the working current of key heating circuits in real time and feed back the heating status to the host computer to realize closed-loop monitoring.

[0004] This application provides the following technical solution: a wing de-icing control device, the device comprising: a closed control box formed by a box assembly and a box cover, wherein an electrical interface is provided on the box assembly, and a control circuit is provided inside the control box; the control circuit includes: The relay drive and switching circuit is used to receive external heating control signals and independently control the on / off state of at least one DC 270V heating power relay and at least one DC 28V heating power relay. A current monitoring circuit is connected in series in the output circuit of the DC 28V heating power supply to collect the operating current of the DC 28V heating power supply circuit and convert the operating current into a first voltage signal. A current signal processing circuit, wherein the input terminal of the current signal processing circuit is connected to the output terminal of the current monitoring circuit, is used to compare the first voltage signal with a preset reference voltage threshold, and output a discrete signal characterizing the heating working state of the wing de-icing device according to the comparison result. The filter circuit is used to filter and regulate the input power supply, and to provide the operating voltage for the control circuit.

[0005] According to one embodiment of this application, the box assembly and the box cover are machined from aluminum alloy material, and the surface is treated with conductive oxidation and painting. The internal dissimilar metal connections are insulated.

[0006] According to one embodiment of this application, the surface of the box assembly is provided with a weight reduction process groove, and the internal mounting structure of the box assembly is riveted and fixed by a 90°MJ threaded right-angle floating support plate with a self-locking nut.

[0007] According to one embodiment of this application, an optocoupler is used in the relay driving and switching circuit to achieve electrical isolation between the control signal and the relay coil; the relay is a solid-state relay with low conduction loss.

[0008] According to one embodiment of this application, the current monitoring circuit employs a Hall effect current sensor; the current signal processing circuit includes a high-precision voltage comparator.

[0009] According to one embodiment of this application, the filter circuit includes a common-mode inductor, a differential-mode inductor, a filter capacitor, and a surge suppressor, used to suppress differential-mode and common-mode noise and output a stable 5V DC voltage.

[0010] According to one embodiment of this application, the electrical interface is a J599 series socket.

[0011] According to one embodiment of this application, the device controls the on / off state of four DC 270V heating power supplies and two DC 28V heating power supplies, and monitors the heating status of the two DC 28V heating power supply paths.

[0012] Compared with the prior art, the beneficial effects that at least one technical solution adopted in the embodiments of this specification can achieve include at least: The wing de-icing control device of the present invention has been designed for weight reduction and ease of use and maintenance. The product box and cover adopt a weight-reducing process groove design, and the box components adopt a 90° MJ thread right-angle floating support plate self-locking nut riveting design to reduce product weight and ensure thread strength.

[0013] The device of this invention is equipped with a filtering circuit, which mainly consists of a filter, a surge suppressor, a differential-mode capacitor, a common-mode inductor, and a differential-mode inductor. The filter can effectively filter out various forms of noise, and the surge suppressor can filter out the influence of instantaneous high-amplitude noise, thus effectively improving the electromagnetic performance of the device. The common-mode capacitor and common-mode inductor work together to further suppress common-mode high-frequency noise between each conductor and ground. The differential-mode inductor and differential-mode capacitor are selected with sufficient voltage resistance to further filter out differential-mode noise in the circuit. After passing through the filtering circuit, a stable 5V voltage is output through the power conversion circuit for relay control, current detection, and other modules.

[0014] The device of this invention includes a relay drive and switching circuit, and uses an optocoupler to control the relay, which can reduce the impact of leakage current on the relay. When the external host computer provides a ground / open circuit signal, the input terminal of the optocoupler is turned on / off, and the output terminal is also turned on / off accordingly, thus controlling the relay's on / off state. The solid-state relay used has the characteristics of low internal resistance, low power loss, low heat generation, long life, and high reliability. A freewheeling diode is connected to the relay control terminal to ensure rapid relay turn-off.

[0015] The device of this invention includes a monitoring circuit that employs a current sampling scheme. The current from the high-voltage side is introduced into a Hall sensor and converted into a processable proportional voltage signal. This voltage signal is read and amplified by a built-in high-precision ADC, and digital calibration technology is used to remove environmental variables such as temperature, noise, hysteresis, and nonlinearity. The final output is a voltage value with an almost ideal transformation ratio to the measured current value. An optocoupler is used to process the output of the dual voltage comparator, ensuring that the 28V loop current outputs +28V when it is above a specified threshold and remains floating when it is below the threshold. This achieves the function of monitoring the heating status of the 28V power supply. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall assembly of the wing de-icing control device according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the internal assembly of the wing de-icing control device according to an embodiment of the present invention; Figure 3 This is an electrical schematic diagram of the wing de-icing control device according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the current circuit of the wing de-icing control device according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the weight reduction groove and support plate nut structure of the wing de-icing control device according to an embodiment of the present invention; Among them, 1-box assembly, 2-box cover, 3-electrical interface, 4-relay, 5-circuit board assembly, 6-plate nut, 7-weight reduction groove structure. Detailed Implementation

[0018] The embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0019] The following specific examples illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. This application can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this application. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0020] like Figures 1-5 As shown, this embodiment of the invention provides a wing de-icing control device. The device includes: a closed control box formed by connecting a box assembly 1 and a box cover 2; an electrical interface 3 is provided on the box assembly 1; and a control circuit is provided inside the control box; the control circuit includes: The relay drive and switching circuit is used to receive external heating control signals and independently control the on / off state of at least one DC 270V heating power relay and at least one DC 28V heating power relay. A current monitoring circuit is connected in series in the output circuit of the DC 28V heating power supply to collect the operating current of the DC 28V heating power supply circuit and convert the operating current into a first voltage signal. A current signal processing circuit, wherein the input terminal of the current signal processing circuit is connected to the output terminal of the current monitoring circuit, is used to compare the first voltage signal with a preset reference voltage threshold, and output a discrete signal characterizing the heating working state of the wing de-icing device according to the comparison result. The filter circuit is used to filter and regulate the input power supply, and to provide the operating voltage for the control circuit.

[0021] This invention discloses a wing de-icing control device that integrates relay on / off control and status monitoring functions. It is mainly used to receive control signals from sensors to control the heating power supply to heat the sensors and to provide feedback on the heating status. The main functions of this invention's device are as follows: (1) Control the on / off of 4 DC 270V heating power supplies to control the heating of the atmospheric data sensor assembly and the surface pressure sensor assembly; (2) Control the on / off of two DC 28V heating power supplies to control the heating of the standard airspeed tube head and the wind vane; (3) Monitor the heating of the standard airspeed tube head and the wind vane, and output the discrete signal of the heating status.

[0022] The wing de-icing control device of the present invention has the characteristics of high reliability, fast response, light weight, low heat generation, and strong environmental resistance.

[0023] The housing assembly 1 of the wing de-icing control device of this invention is machined from aluminum alloy, with a surface treated by conductive oxidation and spray painting. The housing assembly 1 employs a riveting structure with a support plate and nut 6, which reduces product weight, increases installation strength, and facilitates use and maintenance. An internal wire mounting and fixing structure ensures the internal wires are securely bound. The device receives external heating control signals, influencing the on / off state of the drive circuit and controlling the entire hardware system. A 270V heating power input is controlled by a 270V control relay; a 28V heating power input is controlled by a 28V relay, flowing through a current detection circuit and outputting from the control box. The current detection circuit converts the current signal into a voltage signal, which is compared with a threshold voltage reference by the current signal processing circuit to determine the heating status and output a heating status signal.

[0024] In some embodiments, the wing de-icing control device of the present invention mainly consists of a housing assembly 1 (as the main structural component of the product, used for the installation of components and internal devices, and providing a mechanical interface between the product and the aircraft), a J599 series socket (the product control and communication interface, used for electrical interaction between the product and the host computer), a cover 2 (used to protect the interior of the product), a filter circuit (filtering out differential mode noise in the circuit and generating a stable 5V voltage from the 28V voltage), a relay drive and switching circuit (using optocouplers to control the conduction and disconnection of the relay 4), a current monitoring circuit (outputting the ideal ratio voltage value through a current sensor and operational amplifier), and a current signal processing circuit (adjusting the threshold reference voltage and processing the sampling signal), among other main functional components.

[0025] In practice, the product is designed to withstand marine environments. The product box and lid are electrically oxidized and then painted. Standard parts are made of 06Cr19Ni10 stainless steel, and the joints between dissimilar metals are insulated to improve the overall resistance of the product to marine environments.

[0026] In practical implementation, the product of this invention is designed for weight reduction and ease of use and maintenance. The product box adopts a weight-reducing groove structure 7 design, and the box components adopt a 90° MJ threaded right-angle floating support plate self-locking nut riveting design to reduce product weight and ensure thread strength.

[0027] In specific implementation, the relay driving and switching circuit of the present invention uses an optocoupler to achieve electrical isolation between the control signal and the relay coil; the relay 4 is a solid-state relay with low conduction loss to reduce component heating and reduce energy loss of the heating control box; a high-precision resistor is selected to ensure the accuracy of the output voltage reference; a current sensor sampling scheme is adopted to realize the heating status detection of the heating control box; a high-precision current sensor and voltage comparator are used to ensure that the heating control box accurately outputs the discrete heating status signal within the error range.

[0028] In specific implementation, the circuit board assembly 5 of the control circuit in this embodiment of the invention has two completely independent sets of lines. It controls the on / off state of the relay 4 by receiving the heating control signal to realize the power distribution of the 270V and 28V heating power supplies. In addition, the heating status of the 28V heating circuit is detected by the current monitoring method.

[0029] In specific implementation, the filter circuit of this embodiment includes a common-mode inductor, a differential-mode inductor, a filter capacitor, and a surge suppressor, used to suppress differential-mode and common-mode noise and output a stable 5V DC voltage.

[0030] In specific implementation, the current monitoring circuit of this embodiment of the invention uses a Hall effect current sensor; the current signal processing circuit includes a high-precision voltage comparator.

[0031] In practical implementation, the selection of standard parts for the ground power interface device in this embodiment of the invention is shown in Table 1, and the variety and specifications should be reduced. Standard parts such as nuts and screws used for installation and connection should all be inspected and qualified, and their quality should be stable.

[0032] Table 1 Standard Parts List

[0033] The electrical principle of the wing de-icing control device in this embodiment of the invention is as follows: The heating control box mainly receives external heating control signals through the J599 socket, affecting the on / off state of the drive circuit and controlling the entire hardware system. After a 270V input, the output is controlled by a relay; after a 28V input, the output is controlled by a relay, flowing through the current detection circuit and then outputting from the control box. The current monitoring circuit converts the current signal into a voltage signal, compares it with a threshold voltage reference through the current signal processing circuit, determines the heating status, and outputs a heating status signal.

[0034] In the design process of the wing de-icing control device of this invention embodiment, the following points were given priority consideration: (1) The product is designed with functional modularity to facilitate subsequent serialization design; (2) The box assembly is riveted with Toban nuts to ensure product strength and reduce product weight; the product achieves maximum weight reduction through the weight reduction groove and the structure design of the toban nut. (3) A current sensor sampling scheme is adopted to realize the heating status detection of the heating control box; a high-precision current sensor and voltage comparator are used to ensure that the heating control box accurately outputs the discrete signal of heating status within the error range; (4) Select low conduction loss relays to reduce component heating and reduce energy loss of heating control box.

[0035] (5) Prioritize the selection of mature materials that have been used and verified in previous products to ultimately ensure their performance requirements; (6) Combine existing mature process technologies to design the structure of each component to ensure product quality.

[0036] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A wing de-icing control device, characterized in that, The device includes: a closed control box consisting of a box assembly and a box cover; the box assembly has an electrical interface; and the control box contains a control circuit. The control circuit includes: The relay drive and switching circuit is used to receive external heating control signals and independently control the on / off state of at least one DC270V heating power relay and at least one DC 28V heating power relay. A current monitoring circuit is connected in series in the output circuit of the DC 28V heating power supply to collect the operating current of the DC 28V heating power supply circuit and convert the operating current into a first voltage signal. A current signal processing circuit, wherein the input terminal of the current signal processing circuit is connected to the output terminal of the current monitoring circuit, is used to compare the first voltage signal with a preset reference voltage threshold, and output a discrete signal characterizing the heating working state of the wing de-icing device according to the comparison result. The filter circuit is used to filter and regulate the input power supply, and to provide the operating voltage for the control circuit.

2. The wing de-icing control device according to claim 1, characterized in that, The box body and lid are machined from aluminum alloy and the surface is treated with conductive oxidation and painting. The internal dissimilar metal connections are insulated.

3. The wing de-icing control device according to claim 1, characterized in that, The surface of the box assembly is provided with a weight reduction process groove, and the internal mounting structure of the box assembly is fixed by riveting with a 90° MJ threaded right-angle floating support plate and a self-locking nut.

4. The wing de-icing control device according to claim 1, characterized in that, The relay drive and switching circuit uses an optocoupler to achieve electrical isolation between the control signal and the relay coil; the relay is a solid-state relay with low conduction loss.

5. The wing de-icing control device according to claim 1, characterized in that, The current monitoring circuit uses a Hall effect current sensor; the current signal processing circuit includes a high-precision voltage comparator.

6. The wing de-icing control device according to claim 1, characterized in that, The filtering circuit includes a common-mode inductor, a differential-mode inductor, a filter capacitor, and a surge suppressor, used to suppress differential-mode and common-mode noise and output a stable 5V DC voltage.

7. The wing de-icing control device according to claim 1, characterized in that, The electrical interface is a J599 series socket.

8. The wing de-icing control device according to claim 1, characterized in that, The device controls the on / off state of four DC 270V heating power supplies and two DC 28V heating power supplies, and monitors the heating status of the two DC 28V heating power supply paths.

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