Airborne equipment position identification method and device

Abstract

The invention belongs to the technical field of aircraft design, and particularly relates to an airborne equipment position identification method and device, and the method comprises the steps: S1, determining the position of airborne equipment through the airborne equipment installed at a set position of an aircraft according to a plurality of position definition pin pairs of an airborne cable connected with the airborne equipment, the two position definition pins of each position definition pin pair are mutually short-circuited or disconnected; and S2, sending the position of the airborne equipment to an airborne system through a data transmission pin of the airborne cable. According to the invention, the reliability and safety of the position identification signal are improved.

Description

Technical Field

[0001] The present application belongs to the technical field of aircraft design, and in particular relates to a method and device for identifying the position of airborne equipment. Background Art

[0002] In order to meet the high safety and high reliability design requirements of modern aircraft, the core airborne equipment must be designed for redundancy and interchangeability. For example, if there are three or four identical atmospheric data computers, the built-in data processing logic of these three or four airborne equipment is the same, but because they are installed in different positions of the aircraft, some of the parameters obtained have slight differences. The built-in data processing logic of the airborne equipment can make corresponding data corrections according to the specific location where the airborne equipment is installed. The premise of executing this logic is to know where its body is installed. However, since these three or four airborne equipment have the same appearance, they may be interchanged by aircraft assemblers or maintenance personnel, that is, airborne equipment 1 originally placed at position 1 is placed at position 2. At this time, the processing program of airborne equipment 1 does not know that its position has changed, and still uses its correction parameters at position 1 to correct the acquired data, resulting in data deviations and affecting flight safety.

[0003] In order to solve this problem, the prior art usually informs the location of the airborne device at its specific installation location through a cable signal at the location. The cable has two pins, and each pin indicates a specific location by connecting a high level or a low level. For example, of the two pins in the cable set at position 1, one pin is connected to the "high" end of the power supply, and the other pin is connected to the "ground" end of the machine, thereby indicating that the location is position 1. Similarly, of the two pins in the cable set at position 2, one pin is connected to the "high" end of the power supply, and the other pin is also connected to the "high" end of the power supply, thereby indicating that the location is position 2. When an airborne device is connected to the cable at position 1, it can understand its specific location based on the high and low levels of the two pins, and then select the corresponding data processing logic based on its location.

[0004] However, the reliability of the wire connection plays a decisive role in the reliability of the position identification signal of the airborne equipment. If the wire is loose, the power fails, or the ground terminal is disconnected from the "ground" on the aircraft, the airborne equipment will lose the position identification signal, and then the equipment will not work properly. If this problem occurs during the aircraft's mission, it will affect the normal completion of the flight mission and even affect flight safety. Summary of the invention

[0005] In order to solve the above problems, the present application provides a method and apparatus for identifying the position of an airborne device to solve the problem of unreliable power supply or grounding of the cable.

[0006] The first aspect of the present application provides a method for identifying the position of an airborne device, mainly comprising:

[0007] Step S1, the onboard device installed at the set position of the aircraft determines the position of the onboard device according to a plurality of position definition pin pairs of the onboard cable connected thereto, wherein two position definition pins of each position definition pin pair are short-circuited or disconnected with each other;

[0008] Step S2: sending the location of the airborne device to the airborne system via the data transmission pin of the airborne cable.

[0009] Preferably, step S1 further comprises:

[0010] Step S11, obtaining the short-circuit status of two position defining pins that pre-compose a position defining pin pair, and when the two position defining pins are short-circuited with each other, determining the position bit of the position defining pin pair to be 1, otherwise to be 0;

[0011] Step S12: Determine corresponding position information according to a sequence composed of multiple position bits.

[0012] Preferably, in step S1, the position-defining pin pairs of the on-board cable include at least two pairs.

[0013] The second aspect of the present application provides an airborne equipment position identification device, mainly comprising:

[0014] An airborne device location identification module, used for the airborne device installed at a set position of the aircraft to determine the location of the airborne device according to a plurality of location definition pin pairs of an onboard cable connected thereto, wherein two location definition pins of each location definition pin pair are short-circuited or disconnected with each other;

[0015] The position reporting module is used to send the position of the airborne device to the airborne system through the data transmission pin of the airborne cable.

[0016] Preferably, the airborne device location identification module includes:

[0017] A position definition pin pair short circuit state acquisition unit is used to acquire the short circuit state of two position definition pins that pre-compose the position definition pin pair, and when the two position definition pins are short-circuited with each other, the position bit of the position definition pin pair is determined to be 1, otherwise it is 0;

[0018] The position information query unit is used to determine the corresponding position information according to a sequence composed of multiple position bits.

[0019] Preferably, the position-defining pin pairs of the on-board cable include at least two pairs.

[0020] This application improves the reliability and security of location identification signals. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the onboard cable pin design of the onboard equipment location identification method of the present application.

[0022] Figure 2 This application Figure 1 Schematic diagram of the position identification circuit of the illustrated embodiment. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical scheme and advantages of the implementation of this application clearer, the technical scheme in the implementation of this application will be described in more detail in combination with the drawings in the implementation of this application. In the drawings, the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The described implementation is a part of the implementation of this application, not all of the implementations. The implementation described below with reference to the drawings is exemplary and is intended to be used to explain this application, and cannot be understood as a limitation on this application. Based on the implementation in this application, all other implementations obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application. The implementation of this application is described in detail below in combination with the drawings.

[0024] The first aspect of the present application provides a method for identifying the position of an airborne device, mainly comprising:

[0025] Step S1, the onboard device installed at the set position of the aircraft determines the position of the onboard device according to a plurality of position definition pin pairs of the onboard cable connected thereto, wherein two position definition pins of each position definition pin pair are short-circuited or disconnected with each other;

[0026] Step S2: sending the location of the airborne device to the airborne system via the data transmission pin of the airborne cable.

[0027] The present application uses a position definition pin pair consisting of two position definition pins to give a numerical value for representing a position signal. Whether each position definition pin pair is short-circuited or not is relatively stable after the design is finalized, so the output signal is also stable, preventing the problem of a single position definition pin output being unstable due to aircraft vibration.

[0028] In some optional implementations, step S1 further includes:

[0029] Step S11, obtaining the short-circuit status of two position defining pins that pre-compose a position defining pin pair, and when the two position defining pins are short-circuited with each other, determining the position bit of the position defining pin pair to be 1, otherwise to be 0;

[0030] Step S12: Determine corresponding position information according to a sequence composed of multiple position bits.

[0031] In some optional embodiments, in step S1, the position definition pin pairs of the on-board cable include at least two pairs.

[0032] In this embodiment, if Figure 1 As shown, 4 position identification pins are set in the airborne equipment end electrical connector, which are defined as position identification 1 input, position identification 1 output, position identification 2 input and position identification 2 output. Correspondingly, 4 pins are also set in the onboard cable end electrical connector matched with the airborne equipment, which are also defined as position identification 1 input, position identification 1 output, position identification 2 input and position identification 2 output;

[0033] In the cable-end electrical connector, the two pins for position identification 1 input and output are grouped together, and the two pins for position identification 2 input and output are grouped together. Each group of two pins defines its position identification number as 0 or 1 by shorting or not, specifically: two pins shorting is 1, and not shorting is 0, thereby realizing the position identification definition of the airborne device. It can be understood that four position representations can be realized through two pairs of four position definition pins, such as "00" is defined as position 1, "01" is defined as position 2, "10" is defined as position 3, and "11" is defined as position 4. Usually, the redundant design includes 3-4 identical airborne devices installed at 3-4 different positions. The above four pins are sufficient to represent each position. If there are more devices in the redundant design, three, four or more groups of pins can be further used. The functional relationship between the number of devices and the number of pin groups is a power of two relationship. For example, the position identification of 32 devices is completed by 5 groups of pins. In an alternative implementation, more pins may be used to perform further redundancy design, that is, redundancy design of the pin status, for example, using two groups of pins to complete four position identifications, and using another two groups of pins as redundancy design for the previous two groups of pins.

[0034] The circuit principle of the position recognition process is as follows Figure 2 As shown, assuming that a group of position identification pins includes two pins AB, when these two pins are short-circuited, the 28V power supply can be grounded, and the CPU on the right side of the two optocouplers receives the signal normally. Otherwise, the CPU on the right side of the two optocouplers does not receive the signal, thereby completing the output of 0 or 1.

[0035] After the airborne equipment is powered on, it can confirm its position by collecting the position identification signal and thus complete its intended function.

[0036] When realizing the position identification of airborne equipment, the present application only needs to short-circuit or not short-circuit the two pins of the two sets of position identification set in the cable end electrical connector. This method eliminates the wire connecting the position identification pin to the "high" end of the onboard power supply or the "ground" end of the onboard power supply, avoids the problem of position identification signal failure caused by unreliable wire connection, and greatly improves the reliability and safety of the position identification signal.

[0037] The second aspect of the present application provides an airborne device position identification device corresponding to the above method, the device is built into the airborne device in the form of a program, and mainly includes:

[0038] An airborne device location identification module, used for the airborne device installed at a set position of the aircraft to determine the location of the airborne device according to a plurality of location definition pin pairs of an onboard cable connected thereto, wherein two location definition pins of each location definition pin pair are short-circuited or disconnected with each other;

[0039] The position reporting module is used to send the position of the airborne device to the airborne system through the data transmission pin of the airborne cable.

[0040] In some optional implementations, the airborne device location identification module includes:

[0041] A position definition pin pair short circuit state acquisition unit is used to acquire the short circuit state of two position definition pins that pre-compose the position definition pin pair, and when the two position definition pins are short-circuited with each other, the position bit of the position definition pin pair is determined to be 1, otherwise it is 0;

[0042] The position information query unit is used to determine the corresponding position information according to a sequence composed of multiple position bits.

[0043] In some optional embodiments, the position-defining pin pairs of the on-board cable include at least two pairs.

[0044] 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 method for identifying the position of an airborne device, characterized in that: include: Step S1, the onboard device installed at the set position of the aircraft determines the position of the onboard device according to a plurality of position definition pin pairs of the onboard cable connected thereto, wherein two position definition pins of each position definition pin pair are short-circuited or disconnected with each other; Step S2: sending the location of the airborne device to the airborne system via the data transmission pin of the airborne cable.

2. The method for identifying the position of an airborne device according to claim 1, characterized in that: Step S1 further comprises: Step S11, obtaining the short-circuit status of two position defining pins that pre-compose a position defining pin pair, and when the two position defining pins are short-circuited with each other, determining the position bit of the position defining pin pair to be 1, otherwise to be 0; Step S12: Determine corresponding position information according to a sequence composed of multiple position bits.

3. The method for identifying the position of an airborne device according to claim 1, wherein: In step S1, the position definition pin pairs of the on-board cable include at least two pairs.

4. An airborne equipment position identification device, characterized in that: include: An airborne device location identification module, used for the airborne device installed at a set position of the aircraft to determine the location of the airborne device according to a plurality of location definition pin pairs of an onboard cable connected thereto, wherein two location definition pins of each location definition pin pair are short-circuited or disconnected with each other; The position reporting module is used to send the position of the airborne device to the airborne system through the data transmission pin of the airborne cable.

5. The device for identifying the position of an airborne device according to claim 4, characterized in that: The airborne equipment location identification module includes: A position definition pin pair short circuit state acquisition unit is used to acquire the short circuit state of two position definition pins that pre-compose the position definition pin pair, and when the two position definition pins are short-circuited with each other, the position bit of the position definition pin pair is determined to be 1, otherwise it is 0; The position information query unit is used to determine the corresponding position information according to a sequence composed of multiple position bits.

6. The device for identifying the position of an airborne device according to claim 4, characterized in that: The position-defining pin pairs of the on-board cable include at least two pairs.

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