Atmospheric parameter monitoring equipment based on wireless Bluetooth communication

Abstract

The utility model discloses atmosphere parameter monitoring equipment based on wireless Bluetooth communication, which comprises a signal conversion function board and a DB9 female joint which are connected with each other, and the DB9 female joint is connected with an atmosphere data computer. Wherein the signal conversion function board comprises a wireless Bluetooth module and a current source driver which are connected with each other, the wireless Bluetooth module is connected with the user side equipment, and when the atmosphere data computer is used for external field ground joint test or troubleshooting, the user side equipment can directly receive the air pressure height and the atmosphere parameters indicating the air speed sent by the atmosphere data computer; and analyzing according to a sending parameter protocol. Whether data output of the atmosphere data computer is normal or not can be directly judged through the user side equipment, fault inspection and maintenance of the atmosphere data computer by external field maintenance personnel are facilitated, and the advantages of being easy to operate and convenient to maintain are achieved. And the selected modules and devices belong to general equipment, so that the system has the advantages of low cost, small size, light weight, simplicity in operation and convenience in maintenance.

Description

Technical Field

[0001] This utility model belongs to the field of avionics testing of airborne electronic products, and specifically relates to an atmospheric parameter monitoring device based on wireless Bluetooth communication. Background Technology

[0002] Atmospheric data computers are widely used in the aviation and aerospace fields. However, none of the atmospheric data computers developed to date have built-in data display capabilities. They often require monitoring and analysis of atmospheric parameters by the aircraft's avionics system or specialized testing equipment. Alternatively, they may require capturing the waveforms of the atmospheric data computer's bus data using an oscilloscope and then manually analyzing the data to determine if the output is abnormal. Currently, dedicated testing equipment for atmospheric data computers is generally modified from laptops or desktop computers, resulting in large size and weight, high cost, and complex operation, making it extremely inconvenient for field testing or troubleshooting. Furthermore, the method of capturing bus data waveforms with an oscilloscope and then manually calculating them is even more cumbersome and completely out of step with the rapidly developing era of electronic communication. Utility Model Content

[0003] In view of the above-mentioned shortcomings in the existing technology, the present invention provides an atmospheric parameter monitoring device based on wireless Bluetooth communication, which solves the problem of inconvenient ground connection testing or troubleshooting of atmospheric data computers in the field.

[0004] To achieve the above-mentioned objectives, the technical solution adopted by this utility model is as follows: an atmospheric parameter monitoring device based on wireless Bluetooth communication, comprising a signal conversion function board and a DB9 female connector connected to each other, wherein the DB9 female connector is connected to an atmospheric data computer.

[0005] The signal conversion function board includes an interconnected wireless Bluetooth module and a current source driver, with the wireless Bluetooth module connected to the user terminal device.

[0006] Furthermore, the atmospheric data computer is equipped with a DB9 male connector, and the DB9 female connector is connected to the DC3.3V power signal interface and RS422 bus signal interface of the atmospheric data computer through the DB9 male connector.

[0007] Furthermore: the current source driver is a MAX3490. Pin 8 of the current source driver is connected to one end of pull-up resistor R1 and pin 3 of the DB9 female connector. The other end of pull-up resistor R1 is connected to a 3.3V power supply. Pin 7 of the current source driver is connected to grounding resistor R2 and pin 4 of the DB9 female connector. Pin 6 of the current source driver is connected to one end of resistor R4 and one end of resistor R5. The other end of resistor R4 is connected to pin 2 of the DB9 female connector. Pin 5 of the current source driver is connected to one end of resistor R3 and the other end of resistor R5. The other end of resistor R5 is connected to pin 1 of the DB9 female connector. Pin 5 of the DB9 female connector is grounded. Pin 6 of the DB9 female connector is connected to a 3.3V power supply.

[0008] Furthermore: the model of the wireless Bluetooth module is BT04-E. Pin 1 of the wireless Bluetooth module is connected to the 3.3V power supply and pin 1 of the current source driver respectively. Pins 2 and 3 of the wireless Bluetooth module are connected to pins 2 and 3 of the current source driver respectively. Pin 4 of the wireless Bluetooth module is connected to pin 4 of the current source driver and grounded.

[0009] The beneficial effects of this invention are as follows: This invention provides an atmospheric parameter monitoring device based on wireless Bluetooth communication. Through wireless Bluetooth communication technology, communication between the atmospheric data computer and the user terminal device is realized. During field ground testing or troubleshooting of the atmospheric data computer, the user terminal device can directly receive atmospheric parameters such as barometric altitude and indicated air velocity sent by the atmospheric data computer and parse them according to the transmitted parameter protocol. Whether the atmospheric data computer's data output is normal or not can be directly judged through the user terminal device, which is beneficial for field maintenance personnel to troubleshoot and maintain the atmospheric data computer. It features simple operation and convenient maintenance.

[0010] This invention adds protection measures for both the transmission and reception of bus data to avoid data packet loss and frame drop during communication. The selected modules and devices are all general-purpose equipment, which have the advantages of low cost, small size, light weight, simple operation and convenient maintenance.

[0011] This utility model can achieve integrated design, and uses a DB9 female universal interface to communicate with the atmospheric data computer, which has strong expandability. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of an atmospheric parameter monitoring device based on wireless Bluetooth communication.

[0013] Figure 2 The principle of an atmospheric parameter monitoring device based on wireless Bluetooth communication Figure 1 .

[0014] Figure 3 The principle of an atmospheric parameter monitoring device based on wireless Bluetooth communication Figure 2 . Detailed Implementation

[0015] The specific embodiments of this utility model are described below to enable those skilled in the art to understand this utility model. However, it should be understood that this utility model is not limited to the scope of the specific embodiments. For those skilled in the art, as long as various changes are within the spirit and scope of this utility model as defined and determined by the appended claims, these changes are obvious. All inventions utilizing the concept of this utility model are protected.

[0016] like Figure 1 As shown, in one embodiment of this utility model, an atmospheric parameter monitoring device based on wireless Bluetooth communication includes a signal conversion function board and a DB9 female connector connected to each other, and the DB9 female connector is connected to an atmospheric data computer.

[0017] The signal conversion function board includes an interconnected wireless Bluetooth module and a current source driver, with the wireless Bluetooth module connected to the user terminal device.

[0018] The DB9 female connector is used to receive RS422 bus and power signals output from the atmospheric data computer. The current source driver is used to convert differential signals into single-ended serial signals, and the wireless Bluetooth module is used to convert single-ended serial signals into wireless Bluetooth signals.

[0019] The atmospheric data computer is equipped with a DB9 male connector, and the DB9 female connector is connected to the DC3.3V power signal interface and RS422 bus signal interface of the atmospheric data computer through the DB9 male connector.

[0020] like Figure 2 As shown, in this embodiment, the DC3.3V power signal and RS422 bus signal output by the atmospheric data computer are received through the DB9 female connector. The DC3.3V power supply is used to power the signal conversion function board.

[0021] The current source driver is a MAX3490. Pin 8 of the current source driver is connected to one end of pull-up resistor R1 and pin 3 of the DB9 female connector. The other end of pull-up resistor R1 is connected to a 3.3V power supply. Pin 7 of the current source driver is connected to ground resistor R2 and pin 4 of the DB9 female connector. Pin 6 of the current source driver is connected to one end of resistor R4 and one end of resistor R5. The other end of resistor R4 is connected to pin 2 of the DB9 female connector. Pin 5 of the current source driver is connected to one end of resistor R3 and the other end of resistor R5. The other end of resistor R5 is connected to pin 1 of the DB9 female connector. Pin 5 of the DB9 female connector is grounded. Pin 6 of the DB9 female connector is connected to a 3.3V power supply.

[0022] like Figure 3 As shown, in this embodiment, a 680Ω pull-up resistor R1 is connected in series between pin 8 of the current source driver and pin 6 of the DB9 female connector, and is also connected to pin 3 of the DB9 female connector; a 680Ω pull-down resistor R2 is connected in series between pin 7 of the current source driver and pin 5 of the DB9 female connector, and is also connected to pin 4 of the DB9 female connector, to enhance the RS422 bus receive drive and avoid frame drops during bus communication.

[0023] A 120Ω resistor R5 is connected in series between pins 5 and 6 of the current source driver, a 27Ω resistor R3 is connected in series between pin 5 of the current source driver and pin 1 of the DB9 female connector, and a 27Ω resistor R4 is connected in series between pin 6 of the current source driver and pin 2 of the DB9 female connector. This achieves impedance matching for RS422 bus transmission and avoids data communication interruption and packet loss due to signal impedance mismatch.

[0024] The wireless Bluetooth module is model BT04-E. Pin 1 of the wireless Bluetooth module is connected to the 3.3V power supply and pin 1 of the current source driver. Pins 2 and 3 of the wireless Bluetooth module are connected to pins 2 and 3 of the current source driver respectively. Pin 4 of the wireless Bluetooth module is connected to pin 4 of the current source driver and grounded.

[0025] like Figure 3 As shown, pin 1 of the current source driver is connected to pin 6 of the DB9 female connector and also to pin 1 of the wireless Bluetooth module. Pin 4 of the current source driver is connected to pin 5 of the DB9 female connector and also to pin 4 of the wireless Bluetooth module. This enables power supply to the signal conversion board without the need for an external power supply. The power supply and communication functions are achieved directly through the DB9 connector.

[0026] Pin 2 of the current source driver is connected to pin 2 of the wireless Bluetooth module, and pin 3 of the current source driver is connected to pin 3 of the wireless Bluetooth module to achieve signal transmission.

[0027] The wireless Bluetooth module sends atmospheric parameters such as barometric altitude and airspeed to the user terminal device, which then analyzes and displays these atmospheric parameters, thereby enabling the analysis and monitoring of atmospheric data output by the computer.

[0028] The working process of this utility model system is as follows: The atmospheric data computer outputs an RS422 bus signal through the RS422 bus, which includes atmospheric parameters such as power supply, pressure altitude, and airspeed indication. It connects to the DB9 female connector through a standard DB9 male connector and sends the RS422 bus signal to the signal conversion function board. The current source driver in the signal conversion function board converts the RS422 bus signal into a single-ended serial signal. The wireless Bluetooth module converts the single-ended serial signal into a wireless Bluetooth signal, thereby broadcasting the atmospheric parameters such as pressure altitude and airspeed indication in the form of Bluetooth signals. The user terminal device communicates with the wireless Bluetooth module via Bluetooth, parses the pressure and other data, and displays them on the user terminal device's display screen.

[0029] The beneficial effects of this invention are as follows: This invention provides an atmospheric parameter monitoring device based on wireless Bluetooth communication. Through wireless Bluetooth communication technology, communication between the atmospheric data computer and the user terminal device is realized. During field ground testing or troubleshooting of the atmospheric data computer, the user terminal device can directly receive atmospheric parameters such as barometric altitude and indicated air velocity sent by the atmospheric data computer and parse them according to the transmitted parameter protocol. Whether the atmospheric data computer's data output is normal or not can be directly judged through the user terminal device, which is beneficial for field maintenance personnel to troubleshoot and maintain the atmospheric data computer. It features simple operation and convenient maintenance.

[0030] This invention adds protection measures for both the transmission and reception of bus data to avoid data packet loss and frame drop during communication. The selected modules and devices are all general-purpose equipment, which have the advantages of low cost, small size, light weight, simple operation and convenient maintenance.

[0031] This utility model can achieve integrated design, and uses a DB9 female universal interface to communicate with the atmospheric data computer, which has strong expandability.

[0032] In the description of this invention, it should be understood that the terms "center," "thickness," "upper," "lower," "horizontal," "top," "bottom," "inner," "outer," and "radial," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying the relative importance or the number of technical features implicitly specified. Therefore, a feature defined by "first," "second," and "third" may explicitly or implicitly include one or more of that feature.

Claims

1. An atmospheric parameter monitoring device based on wireless Bluetooth communication, characterized in that, This includes interconnected signal conversion function boards and DB9 female connectors, which connect to the atmospheric data computer. The signal conversion function board includes an interconnected wireless Bluetooth module and a current source driver, with the wireless Bluetooth module connected to the user terminal device.

2. The atmospheric parameter monitoring device based on wireless Bluetooth communication according to claim 1, characterized in that, The atmospheric data computer is equipped with a DB9 male connector, and the DB9 female connector is connected to the DC3.3V power signal interface and RS422 bus signal interface of the atmospheric data computer through the DB9 male connector.

3. The atmospheric parameter monitoring device based on wireless Bluetooth communication according to claim 1, characterized in that, The current source driver is a MAX3490. Pin 8 of the current source driver is connected to one end of pull-up resistor R1 and pin 3 of the DB9 female connector. The other end of pull-up resistor R1 is connected to a 3.3V power supply. Pin 7 of the current source driver is connected to ground resistor R2 and pin 4 of the DB9 female connector. Pin 6 of the current source driver is connected to one end of resistor R4 and one end of resistor R5. The other end of resistor R4 is connected to pin 2 of the DB9 female connector. Pin 5 of the current source driver is connected to one end of resistor R3 and the other end of resistor R5. The other end of resistor R5 is connected to pin 1 of the DB9 female connector. Pin 5 of the DB9 female connector is grounded. Pin 6 of the DB9 female connector is connected to a 3.3V power supply.

4. The atmospheric parameter monitoring device based on wireless Bluetooth communication according to claim 3, characterized in that, The wireless Bluetooth module is model BT04-E. Pin 1 of the wireless Bluetooth module is connected to the 3.3V power supply and pin 1 of the current source driver. Pins 2 and 3 of the wireless Bluetooth module are connected to pins 2 and 3 of the current source driver respectively. Pin 4 of the wireless Bluetooth module is connected to pin 4 of the current source driver and grounded.

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