Liên kết dữ liệu radio UAV chi phí thấp

Liên kết dữ liệu radio UAV chi phí thấp

1. Giới thiệu

The digital data link modules are used for the communication between UAVs and the ground station (GS) to send data and receive commands. The two-way radio link must have high reliability and always be connected during the flight. Link module on UAV side must have a low price due to limitation on UAV total cost in mass production.

The main feature of this data link is the low rate of sending and receiving data to reduce the occupied bandwidth and subsequently increase the sensitivity of modules.

Ghi chú 1: The GS module must be capable of communicating with 12 UAVs simultaneously.

2. Thông sô ky thuật

Thông số	Giá trị
Maximum Operating Range	25km
Operating Height	10-5000m
Max UAVs Speed	100bệnh đa xơ cứng
Băng tần	UHF (upper 400MHz)
Frequency Channel Selection	Vâng
Nhảy tần số	Không bắt buộc (được ưa thích)
UAV module Transmit Power	2W
GS module Transmit Power	10W
Tốc độ dữ liệu	See the below figures (software selectable in range of 1kbps to 500kbps)
Packet transmission delay	≤ 5 millisecond
Phát hiện lỗi	CRC
Channel Coding (FEC)	Vâng
Encryption	Vâng
Senstivity	−122dBm@20kbps −199dBm@40kbps −111dBm@230kbps −108dBm@500kbps
MIMO Antenna	Không bắt buộc
chế độ hoạt động	Chỉ đến điểm (GS to one UAV) Point to MultiPoint (GS to maximum 12 UAVs on air, đồng thời)
Receive satuation power	10dBm
No damage receiver power	20dBm
Thời gian khởi động	Less than 2sec
Operationg time	tối đa 30 minutes continuously
Working tempearure	−20°𝐶 ~ + 60°𝐶

Three working modes for this digital data link can be considered, which are described in the following figures. According to the complexity and the cost of link module (specially on UAV side), each topology can be selected.

3. Loại mạng

1- The working frequency of all uplinks and downlinks are different (the nodes work in different channels). 

2- The frequency of uplink and downlink for each node is the same but is different with other nodes.

3- The working frequency of all nodes is same as other nodes and GS is managing the nodes to avoid data loss and interference.

Ghi chú 2: In all the above three topologies, frequency hopping is a great advantage but is not a critical feature.

4. Electrical and Interface

Thông số	Giá trị
UAV Installed Module
Điện áp đầu vào	9~18V
Cổng nối tiếp	1, RS422
Tốc độ baud nối tiếp	9600~460800bps,
Đầu nối ăng ten	High School
Interface Connector	J30J or DB type
Cân nặng	Less than 150g
Kích thước (LxWxH)	8 × 8 × 3 cm
GS Installed Module
Điện áp đầu vào	9~18V
Serail Port	1, RS422
Serial Buad Rate	9600~460800bps,
Ethernet	RJ-45, 100Mbps
Đầu nối ăng ten	N-Type
Interface Connector	J30J or DB type
Cân nặng	Less than 500g
Kích thước (LxWxH)	15 × 10 × 4 cm

Our low-cost UAV Radio Data Link does not has ethernet port, only serial port. The antenna connector is not N-Type, but SMA-Type. vui lòng kiểm tra liên kết dưới đây.