Heating detection system of airborne atmosphere data system

Abstract

The invention provides a heating detection system of an airborne atmosphere data system, which belongs to the technical field of airborne sensor / sensor heating detection and specifically comprises a main channel heating state detection circuit, a standby channel heating state detection circuit and a monitoring channel. When the heating state detected by the monitoring channel is consistent with the main / standby channel heating state detected by the main / standby channel heating state detection circuit, and the reference voltage of the main / standby channel heating state detection circuit and the monitoring channel is effective, the monitoring channel outputs a normal signal of the main / standby channel heating state detection circuit; otherwise, the monitoring channel outputs a fault signal of the main / standby channel heating state detection circuit. Through the processing scheme of the invention, the realization of the function of the heating monitor is ensured, and the correctness of the heating detection result is also ensured.

Description

Technical Field

[0001] The present application relates to the field of heating detection of airborne sensors / receivers, and in particular to a heating detection system for an airborne atmospheric data system. Background Art

[0002] At present, the heating detection system on board only realizes the heating detection function, and has not designed the heating channel detection design, that is, it is impossible to determine whether the heating detection circuit itself can be used normally, and it cannot meet the high safety requirements of civil aircraft, and it cannot achieve the requirements of the unannounced heating failure safety level A. In the actual flight process of the aircraft, the heating switch will be turned on, the heating detection will fail, and the heating state will be falsely reported as heating, but in fact the onboard sensor / receptor is not heated at this time. As a result, the pilot cannot judge the actual heating state through the sensor / receptor heating switch and heating state detection. The occurrence of this situation will mislead the pilot into thinking that the onboard sensor / receptor is working normally, but in fact, ice blockage to varying degrees may have occurred, which will affect the collection and output of key information such as the aircraft's airspeed and altitude, causing a catastrophic impact on the aircraft. Summary of the invention

[0003] In view of this, the present application provides a heating detection system for an airborne atmospheric data system, which solves the problems in the prior art and ensures both the realization of the heating monitor function and the correctness of the heating detection results.

[0004] The present application provides a heating detection system for an airborne atmospheric data system using the following technical solutions:

[0005] A heating detection system for an airborne atmospheric data system, the airborne atmospheric data system comprising a main channel and a backup channel for acquiring atmospheric data and a heating component for heating the airborne probes of the main channel and the backup channel, characterized in that it comprises:

[0006] A main channel heating state detection circuit is used to detect the heating state of the main channel heating component and output a first main channel heating state;

[0007] A standby channel heating state detection circuit is used to detect the heating state of the standby channel heating component and output the first standby channel heating state;

[0008] A monitoring channel, used to detect the heating status of the main channel heating component and the backup channel heating component respectively, and obtain the second main channel heating status and the second backup channel heating status, the monitoring channel is used to obtain the reference voltage of the main channel heating status detection circuit and the backup channel heating status detection circuit, and the monitoring channel is used to receive the first main channel heating status and the first backup channel heating status;

[0009] When the heating state of the first main channel is consistent with the heating state of the second main channel, and the reference voltage of the main channel heating state detection circuit and the monitoring channel is valid, the monitoring channel outputs a signal indicating that the main channel heating state detection circuit is normal; otherwise, the monitoring channel outputs a signal indicating that the main channel heating state detection circuit is faulty;

[0010] When the heating state of the first backup channel is consistent with the heating state of the second backup channel, and the reference voltage of the backup channel heating state detection circuit and the monitoring channel is valid, the monitoring channel outputs a signal that the backup channel heating state detection circuit is normal; otherwise, the monitoring channel outputs a signal that the backup channel heating state detection circuit is faulty.

[0011] Optionally, the main channel heating status detection circuit includes a first heating detection module, a first processor and a first interface module, the first heating detection module is used to detect the heating status of the main channel heating component and output an analog signal, the first processor receives and processes the analog signal output by the first heating detection module to obtain the first main channel heating status, the first interface module receives the first main channel heating status signal and sends it to the upper-level device through an electrical connector, the first processor obtains the reference voltage of the first heating detection module when powered on, and determines whether the reference voltage of the first heating detection module is valid, and the first processor outputs the reference voltage of the first heating detection module to the monitoring channel.

[0012] Optionally, the backup channel heating status detection circuit includes a second heating detection module, a second processor and a second interface module, the second heating detection module is used to detect the heating status of the backup channel heating component and output an analog signal, the second processor receives and processes the analog signal output by the second heating detection module to obtain the first backup channel heating status, the second interface module receives the first backup channel heating status signal and sends it to the upper-level device through an electrical connector, the second processor obtains the reference voltage of the second heating detection module when powered on, and determines whether the reference voltage of the second heating detection module is valid, and the second processor outputs the reference voltage of the second heating detection module to the monitoring channel.

[0013] Optionally, the monitoring channel includes a third heating detection module, a third processor, a third interface module, a first logic judgment module and a second logic judgment module, the third heating detection module includes a first detection component and a second detection component, the first detection component is used to detect the heating state of the main channel heating component and output an analog signal, the second detection component is used to detect the heating state of the standby channel heating component and output an analog signal, the third processor receives and processes the analog signal output by the first detection component to obtain the second main channel heating state, the third processor receives and processes the analog signal output by the second detection component and the second standby channel heating state, the third processor obtains a reference voltage of the third heating detection module when the third processor is powered on, and the third processor outputs the reference voltage of the third heating detection module to the first logic judgment module and the second logic judgment module;

[0014] The first logic judgment module receives the first main channel heating state, the second main channel heating state, the reference voltage of the first heating detection module and the reference voltage of the third heating detection module, the first logic judgment module compares the first main channel heating state with the second main channel heating state, the first logic judgment module judges the validity of the reference voltages of the first heating detection module and the third heating detection module, and the first logic judgment module outputs a signal indicating whether the main channel heating state is faulty;

[0015] The second logic judgment module receives the first standby channel heating state, the second standby channel heating state, the reference voltage of the second heating detection module and the reference voltage of the third heating detection module, the second logic judgment module compares the second standby channel heating state with the first standby channel heating state, the second logic judgment module judges the validity of the reference voltages of the second heating detection module and the third heating detection module, and the second logic judgment module outputs a signal indicating whether the standby channel heating state is faulty;

[0016] The third interface module receives a signal indicating whether the main channel heating state detection circuit is faulty and a signal indicating whether the standby channel heating state detection circuit is faulty and sends the signal to the upper-level device through the electrical connector.

[0017] Optionally, the first interface module, the second interface module and the third interface module all include an optocoupler interface and an ARI NC429 interface, the optocoupler interface outputs the received signal as a discrete quantity signal, and the ARI NC429 interface outputs the received signal state as an ARI NC429 signal.

[0018] Optionally, the ARI NC429 interface is also used to receive a fault signal sent by the processor and send it to a superior device through an electrical connector.

[0019] Optionally, the first processor, the second processor and the third processor are of different models.

[0020] Optionally, the main channel heating status detection circuit, the backup channel heating status detection circuit and the monitoring channel are respectively powered by independent power supply modules.

[0021] In summary, this application includes the following beneficial technical effects:

[0022] The present application can realize the redundancy design, monitoring design and independence design of the heating detection of the airborne probe of the airborne atmospheric data system; the heating detection system of the present application is combined with the independence design requirements of the airborne equipment of civil aircraft, and the heating detection technology is applied to realize the design application of the present invention, which can eliminate the failure mode caused by single point failure, provide the monitoring function of the heating detection status and take into account the independence design to provide new ideas for the design of related airborne probe heating monitors. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 This is a block diagram of the heating detection system of the airborne atmospheric data system of this application;

[0025] Figure 2 This is a principle block diagram of the heating status detection circuit of the main channel, the monitoring channel and the backup channel onboard the present application. DETAILED DESCRIPTION

[0026] The embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0027] The following describes the implementation methods of the present application through specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The present application can also be implemented or applied through other different specific implementation methods, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that, in the absence of conflict, the following embodiments and the features in the embodiments can be combined with each other. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work belong to the scope of protection of the present application.

[0028] It should be noted that various aspects of the embodiments within the scope of the appended claims are described below. It should be apparent that the aspects described herein can be embodied in a wide variety of forms, and any specific structure and / or function described herein is merely illustrative. Based on the present application, it should be understood by those skilled in the art that an aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number of aspects described herein can be used to implement the device and / or practice the method. In addition, other structures and / or functionalities other than one or more of the aspects described herein can be used to implement this device and / or practice this method.

[0029] It should also be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present application. The illustrations only show the components related to the present application rather than being drawn according to the number, shape and size of the components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed at will, and the component layout may also be more complicated.

[0030] Additionally, in the following description, specific details are provided to facilitate a thorough understanding of the examples. However, it will be understood by those skilled in the art that the aspects described may be practiced without these specific details.

[0031] The embodiment of the present application provides a heating detection system for an airborne air data system, which includes a main channel and a backup channel for acquiring air data, and a heating component for heating the airborne probes of the main channel and the backup channel.

[0032] like Figure 1 and Figure 2 As shown, a heating detection system for an airborne air data system includes:

[0033] The main channel heating state detection circuit is used to detect the heating state of the main channel heating component and output the first main channel heating state.

[0034] The standby channel heating state detection circuit is used to detect the heating state of the standby channel heating component and output the first standby channel heating state.

[0035] A monitoring channel is used to detect the heating status of the main channel heating component and the backup channel heating component respectively, and obtain the second main channel heating status and the second backup channel heating status. The monitoring channel is used to obtain the reference voltage of the main channel heating status detection circuit and the backup channel heating status detection circuit. The monitoring channel is used to receive the first main channel heating status and the first backup channel heating status.

[0036] When the heating state of the first main channel is consistent with the heating state of the second main channel, and the reference voltage of the main channel heating state detection circuit and the monitoring channel is valid, the monitoring channel outputs a signal that the main channel heating state detection circuit is normal; otherwise, the monitoring channel outputs a signal that the main channel heating state detection circuit is faulty, and at this time the heating state of the first main channel is unreliable.

[0037] When the heating state of the first backup channel is consistent with the heating state of the second backup channel, and the reference voltage of the backup channel heating state detection circuit and the monitoring channel is valid, the monitoring channel outputs a signal that the backup channel heating state detection circuit is normal; otherwise, the monitoring channel outputs a signal that the backup channel heating state detection circuit is faulty, and at this time the heating state of the first backup channel is unreliable.

[0038] Specific:

[0039] The main channel heating status detection circuit includes a first heating detection module, a first processor and a first interface module. The first heating detection module is used to detect the heating status of the main channel heating component and output an analog signal. The first processor receives and processes the analog signal output by the first heating detection module to obtain the first main channel heating status. The first interface module receives the first main channel heating status signal and sends it to the upper-level device through an electrical connector. When the first processor is powered on, it obtains the reference voltage of the first heating detection module and determines whether the reference voltage of the first heating detection module is valid. The first processor outputs the reference voltage of the first heating detection module to the monitoring channel.

[0040] The standby channel heating status detection circuit includes a second heating detection module, a second processor and a second interface module. The second heating detection module is used to detect the heating status of the standby channel heating component and output an analog signal. The second processor receives and processes the analog signal output by the second heating detection module to obtain the first standby channel heating status. The second interface module receives the first standby channel heating status signal and sends it to the upper-level device through an electrical connector. When the second processor is powered on, it obtains the reference voltage of the second heating detection module and determines whether the reference voltage of the second heating detection module is valid. The second processor outputs the reference voltage of the second heating detection module to the monitoring channel.

[0041] The monitoring channel includes a third heating detection module, a third processor, a third interface module, a first logic judgment module and a second logic judgment module. The third heating detection module includes a first detection component and a second detection component. The first detection component is used to detect the heating state of the main channel heating component and output an analog signal. The second detection component is used to detect the heating state of the backup channel heating component and output an analog signal. The third processor receives and processes the analog signal output by the first detection component to obtain the second main channel heating state. The third processor receives and processes the analog signal output by the second detection component and the second backup channel heating state. When the third processor is powered on, it obtains a reference voltage of the third heating detection module. The third processor outputs the reference voltage of the third heating detection module to the first logic judgment module and the second logic judgment module.

[0042] The first logic judgment module receives the first main channel heating state, the second main channel heating state, the reference voltage of the first heating detection module and the reference voltage of the third heating detection module. The first logic judgment module compares the first main channel heating state with the second main channel heating state. The first logic judgment module judges the validity of the reference voltages of the first heating detection module and the third heating detection module. When the first main channel heating state and the second main channel heating state are consistent and the reference voltages of the first heating detection module and the third heating detection module are valid, the first logic judgment module outputs a signal that the main channel heating state detection circuit is normal; otherwise, the first logic judgment module outputs a signal that the main channel heating state detection circuit is faulty.

[0043] The second logic judgment module receives the first backup channel heating state, the second backup channel heating state, the reference voltage of the second heating detection module and the reference voltage of the third heating detection module. The second logic judgment module compares the first backup channel heating state with the second backup channel heating state. The second logic judgment module judges the validity of the reference voltages of the second heating detection module and the third heating detection module. When the first backup channel heating state and the second backup channel heating state are consistent, and the reference voltages of the second heating detection module and the third heating detection module are valid, the second logic judgment module outputs a signal indicating that the backup channel heating state detection circuit is normal; otherwise, the second logic judgment module outputs a signal indicating that the backup channel heating state detection circuit is faulty.

[0044] The first logic judgment module and the second logic judgment module have the same principle, specifically, both are composed of three logic gates, and the XOR logic determines whether the heating state is synchronized. If the two are synchronized, it is valid, and if they are not, it reports a channel state fault. The AND gate at the same level as the XOR logic receives the reference voltage detection signals of the first heating detection module, the second heating detection module and the third heating detection module respectively sent by the first processor, the second processor and the third processor, that is, when the power-on BIT is on, it detects whether the reference voltage of the first heating detection module, the second heating detection module and the third heating detection module is 2.5V; if all three are 2.5V, the AND gate outputs a valid value of 1, and at the same time, the corresponding ports of the processor are set to be valid; another AND gate receives the results of the XOR-N gate and the AND gate, and when both are valid, a normal discrete quantity signal of the channel state is issued, and if any of the results of the two are invalid, a channel state fault discrete quantity signal is reported. At the same time, the signal is reported to the upper device through the ARI NC429 bus to achieve dual redundancy of the channel state reporting channel.

[0045] The third interface module receives a signal indicating whether the main channel heating state detection circuit is faulty and a signal indicating whether the standby channel heating state detection circuit is faulty and sends the signal to the upper-level device through the electrical connector.

[0046] The first processor, the second processor and the third processor are of different models. The first processor is an MCU, the second processor is a DSP, and the third processor is an SOPC, realizing a non-similar design of three channels. The advantage of using the application processor to realize the heating detection function is that it is applicable to a wide range of loads. By setting different threshold voltages, it can be applicable to loads of various types of AC / DC and voltage and current amplitudes. Without changing the hardware circuit, only the software settings need to be changed.

[0047] The main channel heating state detection circuit, the backup channel heating state detection circuit and the monitoring channel are powered by independent power supply modules. Three processors and three power supplies are designed to ensure the independence of the main channel heating state detection circuit, the backup channel heating state detection circuit and the monitoring channel, so as to avoid affecting other modules due to the failure of one module. While ensuring the redundancy design of the function realization, the correctness of the output heating state is guaranteed by designing the monitoring channel.

[0048] The first interface module, the second interface module and the third interface module all include an optical coupling interface and an ARI NC429 interface. The optical coupling interface outputs the received signal as a discrete quantity signal, and the ARI NC429 interface outputs the received signal state as an ARI NC429 signal.

[0049] The ARINC429 interface is also used to receive the fault signal sent by the processor and send it to the upper device through the electrical connector. The ARI NC429 interface of the main channel heating state detection circuit and the standby channel heating state detection circuit realizes the specific process of fault information judgment: when the MCU and DSP are powered on, they will perform internal FLASH detection, SRAM detection, calculation validity detection, heating detection, etc. If a fault occurs, it can be sent to the upper device through the ARI NC429 bus; the ARINC429 interface of the monitoring channel realizes the specific process of fault information judgment: when SOPC3 is powered on, it will perform internal FLASH detection, SRAM detection, calculation validity detection, heating detection, etc. At the same time, it will compare the heating state of the main channel heating state detection circuit and the standby channel heating state detection circuit with the heating state of the monitoring channel. If the two are inconsistent, the channel fault is also reported through the ARINC429 bus of the monitoring channel, that is, the SOPC of the monitoring channel reports both its own detection fault and the channel state fault of the main channel heating state detection circuit and the standby channel heating state detection circuit through the ARI NC429 bus. The MCU of the main channel heating state detection circuit and the ARI NC429 bus of the standby channel heating state detection circuit DSP send the corresponding heating state in addition to the fault information.

[0050] The present application can realize the redundancy design, monitoring design and independence design of the heating detection of the airborne probe of the airborne atmospheric data system; the heating detection system of the present application is combined with the independence design requirements of the airborne equipment of civil aircraft, and the heating detection technology is applied to realize the design application of the present invention, which can eliminate the failure mode caused by single point failure, provide the monitoring function of the heating detection status and take into account the independence design to provide new ideas for the design of related airborne probe heating monitors.

[0051] The above is only a 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 heating detection system for an airborne atmospheric data system, the airborne atmospheric data system comprising a main channel and a backup channel for acquiring atmospheric data and a heating component for heating the airborne probes of the main channel and the backup channel, characterized in that: include: A main channel heating state detection circuit is used to detect the heating state of the main channel heating component and output a first main channel heating state; A standby channel heating state detection circuit is used to detect the heating state of the standby channel heating component and output the first standby channel heating state; A monitoring channel, used to detect the heating status of the main channel heating component and the backup channel heating component respectively, and obtain the second main channel heating status and the second backup channel heating status, the monitoring channel is used to obtain the reference voltage of the main channel heating status detection circuit and the backup channel heating status detection circuit, and the monitoring channel is used to receive the first main channel heating status and the first backup channel heating status; When the heating state of the first main channel is consistent with the heating state of the second main channel, and the reference voltage of the main channel heating state detection circuit and the monitoring channel is valid, the monitoring channel outputs a signal indicating that the main channel heating state detection circuit is normal; otherwise, the monitoring channel outputs a signal indicating that the main channel heating state detection circuit is faulty; When the heating state of the first backup channel is consistent with the heating state of the second backup channel, and the reference voltage of the backup channel heating state detection circuit and the monitoring channel is valid, the monitoring channel outputs a signal that the backup channel heating state detection circuit is normal; otherwise, the monitoring channel outputs a signal that the backup channel heating state detection circuit is faulty.

2. The heating detection system of the airborne air data system according to claim 1, characterized in that: The main channel heating status detection circuit includes a first heating detection module, a first processor and a first interface module. The first heating detection module is used to detect the heating status of the main channel heating component and output an analog signal. The first processor receives and processes the analog signal output by the first heating detection module to obtain the first main channel heating status. The first interface module receives the first main channel heating status signal and sends it to the upper-level device through an electrical connector. When the first processor is powered on, it obtains the reference voltage of the first heating detection module and determines whether the reference voltage of the first heating detection module is valid. The first processor outputs the reference voltage of the first heating detection module to the monitoring channel.

3. The heating detection system of the airborne air data system according to claim 2, characterized in that: The standby channel heating status detection circuit includes a second heating detection module, a second processor and a second interface module. The second heating detection module is used to detect the heating status of the standby channel heating component and output an analog signal. The second processor receives and processes the analog signal output by the second heating detection module to obtain the first standby channel heating status. The second interface module receives the first standby channel heating status signal and sends it to the upper-level device through an electrical connector. When the second processor is powered on, it obtains the reference voltage of the second heating detection module and determines whether the reference voltage of the second heating detection module is valid. The second processor outputs the reference voltage of the second heating detection module to the monitoring channel.

4. The heating detection system of the airborne air data system according to claim 3, characterized in that: The monitoring channel includes a third heating detection module, a third processor, a third interface module, a first logic judgment module and a second logic judgment module, the third heating detection module includes a first detection component and a second detection component, the first detection component is used to detect the heating state of the main channel heating component and output an analog signal, the second detection component is used to detect the heating state of the standby channel heating component and output an analog signal, the third processor receives and processes the analog signal output by the first detection component to obtain the second main channel heating state, the third processor receives and processes the analog signal output by the second detection component and the second standby channel heating state, the third processor obtains the reference voltage of the third heating detection module when the third processor is powered on, and the third processor outputs the reference voltage of the third heating detection module to the first logic judgment module and the second logic judgment module; The first logic judgment module receives the first main channel heating state, the second main channel heating state, the reference voltage of the first heating detection module and the reference voltage of the third heating detection module, the first logic judgment module compares the first main channel heating state with the second main channel heating state, the first logic judgment module judges the validity of the reference voltages of the first heating detection module and the third heating detection module, and the first logic judgment module outputs a signal indicating whether the main channel heating state is faulty; The second logic judgment module receives the first standby channel heating state, the second standby channel heating state, the reference voltage of the second heating detection module and the reference voltage of the third heating detection module, the second logic judgment module compares the second standby channel heating state with the first standby channel heating state, the second logic judgment module judges the validity of the reference voltages of the second heating detection module and the third heating detection module, and the second logic judgment module outputs a signal indicating whether the standby channel heating state is faulty; The third interface module receives a signal indicating whether the main channel heating state detection circuit is faulty and a signal indicating whether the standby channel heating state detection circuit is faulty and sends the signal to the upper-level device through the electrical connector.

5. The heating detection system of the airborne air data system according to claim 4, characterized in that: The first interface module, the second interface module and the third interface module all include an optical coupling interface and an ARINC429 interface. The optical coupling interface outputs the received signal as a discrete quantity signal, and the ARINC429 interface outputs the received signal state as an ARINC429 signal.

6. The heating detection system of the airborne air data system according to claim 5, characterized in that: The ARINC429 interface is also used to receive a fault signal from the processor and send it to a superior device through an electrical connector.

7. The heating detection system of the airborne air data system according to claim 4, characterized in that: The first processor, the second processor and the third processor are of different models.

8. The heating detection system of the airborne air data system according to claim 1, characterized in that: The main channel heating state detection circuit, the standby channel heating state detection circuit and the monitoring channel are respectively powered by independent power supply modules.

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