A heating detection system for an airborne atmospheric data system
By introducing heating status detection circuits and independent power supply designs for the main channel, backup channel and monitoring channel in the airborne atmospheric data system, the accuracy and independence issues of the heating detection system are solved, ensuring flight safety.
Patent Information
- Application Number
- CN202411236271.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-04
- Publication Date
- 2025-09-30
- Estimated Expiration
- 2044-09-04
AI Technical Summary
The existing airborne heating detection system is unable to determine whether the heating detection circuit is working properly, resulting in the inability to meet the high safety requirements of civil aircraft airborne equipment. It may cause the sensor to ice and become blocked, affecting the collection and output of key aircraft information, and there is a risk of misleading pilots.
A heating detection system for an airborne atmospheric data system is designed, including heating status detection circuits for the main channel and the backup channel, as well as a monitoring channel. The accuracy and independence of heating status detection are ensured through a logic judgment module and an independent power supply module.
The redundant and independent design of the heating detection system is achieved, eliminating the failure mode caused by single-point failure, ensuring the accuracy of the heating detection results and flight safety.
Smart Images
Figure CN119223488B_ABST
Abstract
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] Currently, the onboard heating detection system simply implements the heating detection function, and has no design for heating channel detection. In other words, it is impossible to determine whether the heating detection circuit itself can be used normally, and cannot meet the high safety requirements of civil aircraft. It is also impossible to achieve the requirement of unannounced heating failure safety level A. During actual aircraft flight, there will be situations where the heating switch is turned on, the heating detection fails, and the heating status is falsely reported as heating, but in fact the onboard sensor / receptor is not heating. As a result, the pilot cannot determine the actual heating status of the sensor / receptor through the heating switch and heating status detection. This situation will mislead the pilot into thinking that the onboard sensor / receptor is working normally, but in fact it may have been blocked by varying degrees of ice, which will affect the collection and output of key information such as the aircraft's airspeed and altitude, causing catastrophic effects 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 air 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 by comprising:
[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 a first standby channel heating state;
[0008] a monitoring channel for detecting the heating status of the main channel heating component and the backup channel heating component, respectively, and obtaining a second main channel heating status and a second backup channel heating status; the monitoring channel is used to obtain a 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;
[0009] When the heating state of the first main channel and the heating state of the second main channel are consistent, 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 and the heating state of the second backup channel are consistent, and the reference voltage of the backup channel heating state detection circuit and the monitoring channel are 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. 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.
[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 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 to obtain the second backup channel heating state, the third processor obtains a reference voltage of the third heating detection module when 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, judges the validity of the reference voltages of the first heating detection module and the third heating detection module, and outputs a signal indicating whether the main channel heating state is faulty.
[0015] The second logic judgment module receives the heating state of the first backup channel, the heating state of the second backup channel, 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 heating state of the first backup channel with the heating state of the second backup channel. The second logic judgment module judges the validity of the reference voltages of the second heating detection module and the third heating detection module. The second logic judgment module outputs a signal indicating whether the heating state of the backup channel 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 backup 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 ARINC429 interface, the optocoupler interface outputs the received signal as a discrete quantity signal, and the ARINC429 interface outputs the received signal state as an ARINC429 signal.
[0018] Optionally, the ARINC429 interface is further configured to receive a fault signal from the processor and send the fault signal to a higher-level device via 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 has the following beneficial technical effects:
[0022] This application can realize the redundancy design, monitoring design and independence design of the airborne probe heating detection of the airborne atmospheric data system; the heating detection system of this application combines the independence design requirements of civil aircraft airborne equipment, and applies heating detection technology 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 following briefly introduces the drawings required for use in the embodiments. 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 any creative work.
[0024] Figure 1 This is a block diagram of the heating detection system of the airborne air data system in this application;
[0025] Figure 2 This is a principle block diagram of the heating status detection circuit of the main channel, monitoring channel and backup channel onboard this 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 embodiments 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 embodiments, 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 features in the following embodiments and embodiments can be combined with each other. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative work are within the scope of protection of this 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 this 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 an apparatus and / or practice a method. In addition, other structures and / or functionalities other than one or more of the aspects described herein can be used to implement this apparatus 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 components related to the present application and are not drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component can be changed at will, and the component layout type may also be more complicated.
[0030] Additionally, in the following description, specific details are provided to provide a thorough understanding of the examples. However, one skilled in the art will appreciate that the aspects described can 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] The monitoring channel is used to respectively detect the heating status of the main channel heating component and the backup channel heating component, 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] Specifically:
[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 status of the main channel heating component and output an analog signal. The second detection component is used to detect the heating status 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 status. The third processor receives and processes the analog signal output by the second detection component to obtain the second backup channel heating status. When the third processor is powered on, it obtains the 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 indicating that the main channel heating state detection circuit is normal; otherwise, the first logic judgment module outputs a signal indicating 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 and second logic judgment modules share the same principles, specifically consisting of three logic gates. The XOR logic determines whether the heating states are synchronized. If they are, the state is valid; if not, a channel state fault is reported. The AND gate, at the same level as the XOR logic, receives the reference voltage detection signals from the first, second, and third heating detection modules, respectively, sent by the first, second, and third processors. This gate detects whether the reference voltages of the first, second, and third heating detection modules are 2.5V during power-on. If all three are 2.5V, the AND gate outputs a valid value of 1 and simultaneously sets the corresponding processor ports to valid. Another AND gate receives the results of the XOR-NOR and AND gates. If both are valid, a channel state normal discrete signal is issued. If either result is invalid, a channel state fault discrete signal is reported. This signal is also reported to the higher-level device via the ARINC429 bus, achieving dual redundancy in 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 backup channel heating state detection circuit is faulty and sends the signal to the upper-level device through the electrical connector.
[0046] The first, second, and third processors are of different models. The first processor is an MCU, the second is a DSP, and the third is an SOPC, achieving a three-channel non-similar design. The advantage of using an application processor for heat detection is its wide applicability. By setting different threshold voltages, it can accommodate a wide range of AC / DC loads and voltage and current amplitudes. This requires only software changes without changing the hardware circuitry.
[0047] The main channel heating status detection circuit, backup channel heating status detection circuit, and monitoring channel are each powered by independent power supply modules. Three processors and three power supplies ensure the independence of the main channel heating status detection circuit, backup channel heating status detection circuit, and monitoring channel, preventing the failure of one module from affecting the others. While ensuring functional redundancy, the monitoring channel is designed to ensure the accuracy of the output heating status.
[0048] The first interface module, the second interface module and the third interface module each include an optocoupler interface and an ARINC429 interface. The optocoupler interface outputs a received signal as a discrete quantity signal, and the ARINC429 interface outputs a received signal as an ARINC429 signal.
[0049] The ARINC429 interface is also used to receive fault signals from the processor and transmit them to the upper-level device via an electrical connector. The ARINC429 interfaces of the main channel heating status detection circuit and the backup channel heating status detection circuit implement a specific process for fault information determination: when the MCU and DSP are powered on, they perform internal FLASH checks, SRAM checks, calculation validity checks, and heating checks. If a fault occurs, the information is transmitted to the upper-level device via the ARINC429 bus. The ARINC429 interface of the monitoring channel implements a specific process for fault information determination: when the SOPC3 is powered on, it performs internal FLASH checks, SRAM checks, calculation validity checks, and heating checks. It also compares the heating status of the main channel heating status detection circuit and the backup channel heating status detection circuit with the heating status of the monitoring channel. If the two are inconsistent, the channel fault is also reported via the monitoring channel's ARINC429 bus. That is, the monitoring channel's SOPC reports both its own detection fault and the channel status fault of the main channel heating status detection circuit and the backup channel heating status detection circuit via the ARINC429 bus. The ARINC429 buses of the MCU of the main channel heating state detection circuit and the DSP of the standby channel heating state detection circuit send corresponding heating states in addition to the fault information.
[0050] This application can realize the redundancy design, monitoring design and independence design of the airborne probe heating detection of the airborne atmospheric data system; the heating detection system of this application combines the independence design requirements of civil aircraft airborne equipment, and applies heating detection technology 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 description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection 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 a first standby channel heating state; a monitoring channel for detecting the heating status of the main channel heating component and the backup channel heating component, respectively, and obtaining a second main channel heating status and a second backup channel heating status; the monitoring channel is used to obtain a 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; When the heating state of the first main channel and the heating state of the second main channel are consistent, 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 and the heating state of the second backup channel are consistent, and the reference voltage of the backup channel heating state detection circuit and the monitoring channel are 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 for an 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 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 to obtain 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. 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, judges the validity of the reference voltages of the first heating detection module and the third heating detection module, and outputs a signal indicating whether the main channel heating state is faulty. The second logic judgment module receives the heating state of the first backup channel, the heating state of the second backup channel, 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 heating state of the first backup channel with the heating state of the second backup channel. The second logic judgment module judges the validity of the reference voltages of the second heating detection module and the third heating detection module. The second logic judgment module outputs a signal indicating whether the heating state of the backup channel 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 backup 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 for an airborne air data system according to claim 4, characterized in that: The first interface module, the second interface module and the third interface module each include an optocoupler interface and an ARINC429 interface. The optocoupler interface outputs a received signal as a discrete quantity signal, and the ARINC429 interface outputs a received signal as an ARINC429 signal.
6. The heating detection system for an 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 higher-level device through an electrical connector.
7. The heating detection system for an 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 for an 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.