Demand analysis In order to better help improve the efficiency of accident emergency command and save maintenance costs, according to the customer's technical requirements, the company produced COFDM high-definition wireless image transmission system solutions.
The purpose of mobile wireless image transmission system is to satisfy customers and it must have high reliability and practicality:
1. Using COFDM all-digital modulation and demodulation technology, the system can meet the requirements of emergency command in a variety of complex climate conditions;
2. The wireless image must be transmitted in a blocking environment, and the line-of-sight transmission distance is 10km. If the distance exceeds 10km, it can be transmitted by a 4G network.
3. Must provide high quality image transmission. The image transmitting end and receiving end adopt a fixed-point fixed manner and can transmit reliably. The omni-directional transmission and reception antennas can be used to facilitate the installation.
4. The receiver has SDI, BNC output;
5. The system is simple, reliable and flexible in application;
6. In a complex electromagnetic environment, with excellent anti-jamming performance.
Overall System Solution I. System Solution Diagram
Second, the basic description of the project a unit highway wireless surveillance image transmission system, the first use of PTZ cameras for
Real-time monitoring of the scene, through the SDI interface to the real-time image input to the 20W rack transmitter, and then transmitted by the transmitter through the microwave The monitoring site within 10km is received by the wireless device. If it needs to receive video at a place beyond 10km, it can be transmitted by the device through a 4G network, centralized monitoring at the 4G client of the computer, and can be output to a large screen display. Its monitoring points are distributed as follows:
Front-end: The device is a 20W rack-type transmitter,
PTZ Camera, transmitting antenna, set up at each intersection, and collects and transmits video and audio signals.
Wireless terminal: The equipment is a comprehensive command platform and a receiving antenna.
Third, the system equipment features, features 1, frequency from 300M-900MHZ, support for 2,2.5,4,8M bandwidth, field adjustable, receiver sensitivity up to -107dBm
2, comes with
SD card access 3, support for 4G two-way voice intercom 4, integrated 14-inch high-definition display, to achieve local display of received data 5, support for high-definition output (SDI) and external large-screen display 6, to provide 2-way Local video access 7, support PTZ control function 8, own signal strength display four, 4G client main functions 1, real-time video 2, multi-screen monitoring 3, GPS positioning monitoring 4, voice monitoring record 5, information retrieval playback 6 , Diary management 7, Delivery task information 8, Driving statistics 9, Real-time alarm capture
April 02, 2020
