The geomagnetic interference of Xiang gs UAV is serious. What should I do if I can't connect to the wifi signal?

Natural enemies are an indispensable part in the development of natural biological chain. Some fast-rising species must produce natural enemies to curb the harm caused by their crazy and disorderly growth. This principle may also apply to some scientific and technological fields, such as drones. In recent years, unmanned aerial vehicles (in this paper, civil multi-axis aircraft) are being popularized at an unprecedented speed, which leads to increasing concerns about safety. Many related departments and even individuals hope to take some measures to prevent drones from flying to sensitive areas. In order to achieve this goal, many methods can be used, such as training eagles to fly and catch.

The basic task of UAV automatic flight control system is to keep the aircraft attitude and track stable when the UAV is disturbed in the air, and change the aircraft attitude and track according to the requirements of ground wireless transmission instructions to complete navigation calculation, telemetry data transmission, task control and management.

The most typical ones are the counter devices in the anti-black flying market, which generally interfere with drones by means of signal interference, sound wave interference and radio hijacking. Signal interference, such as GPS interference, releases a certain power of directional radio frequency to the UAV, so that the UAV equipped with GPS positioning system can not obtain accurate coordinate data, and can only hover in the air and sway with the wind; Acoustic interference-the main target is the gyroscope carried by the drone. When the audio frequency is consistent with its natural frequency, both sides will produce * * vibration, which will affect the normal work of the gyroscope and lead to the flight disorder of the UAV. In severe cases, it may cause the drone to crash; Radio hijacking-by interfering with the radio frequency between the drone and the flying hand, the drone can gain control, make it wander in place, fall directly, or return on its own.

Jiangsu Yimei security equipment belongs to Beijing Wangwang Technology Co., Ltd., located in Yixing Economic and Technological Development Zone, a national economic and technological development zone, and has four industrial clusters: new energy industry, optoelectronics industry, new materials industry and advanced equipment manufacturing industry. Yimei Security focuses on the field of intelligent UAV defense, specializing in the research, development, design and production of UAV countermeasures equipment. It has a production workshop of more than 65,438+0,500 square meters, a number of professional production lines and finished product lines, 3D printers, injection molding machines, precision processing equipment and various professional production inspection equipment.

1, you can receive it, as long as there is no arrears in the phone from the time someone sends a text message to the time you turn it on (overdue recharge is not allowed), you can receive it when you turn it on.

2. However, it should be noted that even if everything is normal, the default validity period of SMS is only 48 hours (unless you change the settings yourself, but you can't change this setting now). As long as you don't turn on the phone within 48 hours after someone else sends the SMS, you won't receive it if you turn it on again.

3. When the phone is turned off, the system will automatically keep the message for you for 24 hours. When you turn on the computer.

Due to different regions, some regions can keep short messages for 72 hours or even longer.