Data line for flight data downloading and FDR downloading equipment

Abstract

The utility model relates to a data line for flight data downloading and FDR downloading equipment. One end of the data line adopts an RJ45 interface, and the other end of the data line adopts a DB15 flat plug; a fifteenth pin, used for a data sending positive end, in the DB15 flat plug corresponds to a first pin, used for a data receiving positive end, in the RJ45 interface; an eighth pin, used for a data transmitting negative end, in the DB15 flat plug corresponds to a second pin, used for a data receiving negative end, in the RJ45 interface; a fourteenth pin, used for a data receiving positive end, in the DB15 flat plug corresponds to a third pin, used for a data sending positive end, in the RJ45 interface; a seventh pin, used for a data receiving negative end, in the DB15 flat plug corresponds to a sixth pin, used for a data transmitting negative end, in the RJ45 interface; in the DB15 flat plug, a ninth pin used for receiving 28V direct current voltage and a tenth pin used for outputting 28V direct current voltage are in short circuit. Compared with the prior art, the device has the advantages of low cost, convenience in maintenance, stable performance and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of FDR, in particular to a data line for downloading flight data and an FDR downloading device. Background Art

[0002] Currently, the FDRs (Flight Data Recorders) installed on China Eastern Airlines aircraft are not domestically produced; the vast majority are manufactured by the American company Honeywell. Each download of FDR data requires the use of Honeywell's FDR downloader (69001074-060), which is expensive. This device uses an imported handheld PDA and connects to the FDR via a USB port. This results in a high USB port failure rate and expensive repairs. In many cases, domestic manufacturers have been unable to repair the device and have therefore sent the device to the original manufacturer for repair. Furthermore, the original manufacturer's download data cables are also quite expensive and have a high failure rate, causing significant inconvenience to repairs.

[0003] At present, the equipment is subject to technical blockade by OEM manufacturers. The core technology and data cable process are all in the hands of OEM manufacturers. Not only is the purchase price high, but the maintenance cost is also high. The long maintenance cycle often affects the progress of maintenance work.

[0004] How to achieve low-cost and stable performance FDR data download has become a technical problem that needs to be solved. Utility Model Content

[0005] The purpose of the present invention is to provide a data cable and FDR downloading device for downloading flight data in order to overcome the defects of the prior art.

[0006] The purpose of the utility model can be achieved through the following technical solutions:

[0007] According to one aspect of the present invention, a data cable for downloading flight data is provided, wherein one end of the data cable adopts an RJ45 interface and the other end adopts a DB15 flat plug;

[0008] The 15th pin of the DB15 flat plug for the positive end of data transmission corresponds to the 1st pin of the RJ45 interface for the positive end of data reception;

[0009] The 8th pin of the DB15 flat plug for the negative end of data transmission corresponds to the 2nd pin of the RJ45 interface for the negative end of data reception;

[0010] The 14th pin of the DB15 flat plug for the positive data receiving terminal corresponds to the 3rd pin of the RJ45 interface for the positive data transmitting terminal;

[0011] The 7th pin of the DB15 flat plug for the negative end of data reception corresponds to the 6th pin of the RJ45 interface for the negative end of data transmission;

[0012] The 9th pin for receiving a 28V DC voltage and the 10th pin for outputting a 28V DC voltage in the DB15 flat plug are short-circuited.

[0013] Preferably, the surface of the DB15 flat plug has a strip-shaped groove, with screw marks at both ends of the groove.

[0014] More preferably, a screw for fixing the plug is provided on the side where the screw mark is located.

[0015] More preferably, the direction of the screw is parallel to the pin direction of the DB15 flat plug.

[0016] According to another aspect of the present invention, an FDR download device for downloading flight data is provided, including a device data cable and a laptop computer equipped with FDR download software, wherein one end of the data cable is connected to the FDR device and the other end is connected to the laptop computer.

[0017] Preferably, the data cable is connected to the FDR device via its DB15 flat plug.

[0018] Preferably, the data cable is connected to the network of the laptop via its RJ45 interface.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1) The utility model realizes a self-developed data cable for FDR data download by analyzing the interfaces of FDR equipment and handheld PDA. One end of the cable is an RJ45 interface and the other end is a DB15 flat plug, which is low in cost and easy to maintain.

[0021] 2) The utility model uses a self-developed data cable to connect the FDR device to the network port of a laptop computer to achieve the transmission of FDR data. The cost of the entire set of equipment is much lower than that of imported handheld PDAs and is easy to maintain.

[0022] 3) The device of the utility model is connected to the FDR device via a DB15 flat plug, which has more stable performance and lower failure rate than a USB port, thereby improving the utilization rate of the FDR download device. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a structural diagram of the data line in the utility model;

[0024] Figure 2 This is the pinout diagram of the DB15 flat plug in this utility model;

[0025] Figure 3 Figure 1 is a structural schematic diagram of the FDR downloading device in the present application;

[0026] In the drawings, 11 is the FDR device, 21 is the notebook computer, 31 is the data line, 301 is the RJ45 interface, 302 is the DB15 flat plug, 303 is the screw mark, 304 is the screw, and 305 is the groove. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work should belong to the scope of protection of the present application.

[0028] The present embodiment relates to a data line for flight data downloading. One end of the data line 31 is provided with an Ethernet RJ45 interface (male head) 301, and the other end is provided with a DB15 flat plug (15-pin D-SUB plug) 302. Figure 1 The data transmission between the notebook computer 21 and the FDR device 11 is based on the Ethernet protocol, and no additional conversion chip is needed, and the data transmission can be realized by using a network cable.

[0029] The pin distribution of the DB15 flat plug 302 is as shown in Figure 2 The partial pin definitions of the DB15 flat plug 302 are shown in Table 1.

[0030] Table 1

[0031] DB15 flat plug pinout Pin Marking Pin mark Chinese meaning 7 ETHERNET RX(-) Data receiving negative terminal 8 ETHERNET TX(-) Data sending negative terminal 14 ETHERNET RX(+) Data receiving positive terminal 15 ETHERNET TX(+) Data sending positive terminal 9 +28VOC RETURN 28V DC voltage receiving 10 +28VOC OUT 28V DC voltage output

[0032] Only four pins are used for Ethernet port communication, and the rest are jumpers. The partial pin definitions of the Ethernet RJ45 interface 301 are shown in Table 2.

[0033] Table 2

[0034] RJ45 interface pinout Pin Marking Pin mark Chinese meaning 1 RX+ Data receiving positive terminal 2 RX- Data receiving negative terminal 3 TX+ Data sending positive terminal 6 TX- Data sending negative terminal

[0035] After the meanings of the pins of the two interfaces are determined, the pins of the two interfaces are related and corresponded, as shown in the table.

[0036] The 15th pin of the DB15 flat plug 302 corresponds to the 1st pin of the RJ45 interface 301, the 8th pin of the DB15 flat plug 302 corresponds to the 2nd pin of the RJ45 interface 301, the 14th pin of the DB15 flat plug 302 corresponds to the 3rd pin of the RJ45 interface 301, the 7th pin of the DB15 flat plug 302 corresponds to the 6th pin of the RJ45 interface 301, and the 9th pin and the 10th pin of the DB15 flat plug 302 are short-circuited.

[0037] Table 3

[0038] DB15 flat plug pinout RJ45 interface pinout 15 1 14 3 8 2 7 6 9 and 10 short circuit

[0039] The DB15 flat plug 302 has a stripe-shaped groove 305 on its surface. Screw marks 303 are located at either end of the groove 305. These marks indicate that screws 304 are located on the side of the plug where screw marks 303 are located, which is used to secure the plug to the aircraft's FDR device 11. Screw marks 303 serve as a reminder to personnel that screws are available on the side for tightening. Screws 304 are oriented parallel to the direction of the pins on the plug 302.

[0040] Original data cables can cost thousands of dollars (excluding tax), while making your own costs only 500 yuan. Our own data cables for FDR data downloads are much cheaper than OEM parts and are easier to repair.

[0041] This embodiment relates to an FDR download device for downloading flight data. The device includes a data cable 31 and a laptop computer 21. When in use, one end of the data cable 31 (DB15 flat plug 302) is connected to the download interface of the FDR device 11, and the other end (RJ45 interface 301) is connected to the network port of the laptop computer 21. Figure 3 .

[0042] The original imported handheld PDA FDR download software (Honeywell's EHHDLU software) was transplanted to a laptop computer, and the download function was realized by connecting the laptop computer 21 to the FDR device 11 using a data cable 31, and has been successfully verified on an airplane.

[0043] Compared with the original handheld PDA, the widely used laptop computer is not only much cheaper but also much more stable. Even if a failure occurs, it is not only easy to maintain but also has low repair costs.

[0044] The laptop computer should be installed with X86 platform Windows system, and the hardware should meet the following conditions:

[0045] CPU: 1.4GHz and above

[0046] Memory: 512MB RAM and above

[0047] Hard disk: 20GB Hard Disk and above

[0048] Interface: at least 1 Ethernet interface, at least 1 USB interface (2.0 and above)

[0049] Due to the limitations of the working environment, try to choose a drop-resistant notebook for industrial use.

[0050] Since downloading FDR data is one-way and FDR uses a non-WINDOWS system, there is no possibility of computer viruses spreading to FDR.

[0051] In the past, FDR devices and handheld PDAs were connected via a USB interface, resulting in a high failure rate for the device's USB port. The USB port on a handheld PDA is integrated into the PDA's motherboard, resulting in long repair cycles and high costs. This application uses a DB15 flat plug to connect to the FDR device and an RJ45 interface to connect to a laptop, which is more reliable than a USB port.

[0052] The cost of the entire set of equipment (laptop computer + data cable) is only about 10,000 yuan, which is much lower than imported handheld PDAs, and it has stable performance and is easy to maintain.

[0053] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and such modifications or substitutions are intended to be within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be subject to the scope of protection of the claims.

Claims

1. A data cable for downloading flight data, characterized in that: One end of the data line (31) adopts an RJ45 interface (301) and the other end adopts a DB15 flat plug (302); The 15th pin of the DB15 flat plug (302) for the positive end of data transmission corresponds to the 1st pin of the RJ45 interface (301) for the positive end of data reception; The eighth pin of the DB15 flat plug (302) for the negative end of data transmission corresponds to the second pin of the RJ45 interface (301) for the negative end of data reception; The 14th pin of the DB15 flat plug (302) for the positive end of data reception corresponds to the 3rd pin of the RJ45 interface (301) for the positive end of data transmission; The seventh pin of the DB15 flat plug (302) for the negative end of data reception corresponds to the sixth pin of the RJ45 interface (301) for the negative end of data transmission; The 9th pin for receiving a 28V DC voltage and the 10th pin for outputting a 28V DC voltage in the DB15 flat plug (302) are short-circuited.

2. The data cable for downloading flight data according to claim 1, characterized in that: The surface of the DB15 flat plug (302) has a strip-shaped groove (305), and screw marks (303) are provided at both ends of the groove (305).

3. The data cable for downloading flight data according to claim 2, characterized in that: A screw (304) for fixing the plug is provided on the side where the screw mark (303) is located.

4. The data cable for downloading flight data according to claim 3, characterized in that: The direction of the screw (304) is parallel to the direction of the pins of the DB15 flat plug (302).

5. An FDR downloading device for flight data downloading, characterized in that: The device comprises a data cable (31) according to any one of claims 1 to 4 and a laptop computer (21) equipped with FDR download software, wherein one end of the data cable (31) is connected to the FDR device (11), and the other end is connected to the laptop computer (21).

6. The FDR downloading device for flight data downloading according to claim 5, characterized in that: The data line (31) is connected to the FDR device (11) via its DB15 flat plug.

7. The FDR downloading device for flight data downloading according to claim 5, characterized in that: The data line (31) is connected to the network of the notebook computer (21) via its RJ45 interface.

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