Coal mine underground network video monitoring terminal circuit

Abstract

The invention discloses a coal mine underground network video monitoring terminal circuit. The system comprises an FPGA module, and an RTC real-time clock circuit, a FLASH memory circuit, a DRAM memory circuit, a configuration chip and an AVB Ethernet module which are connected with the FPGA module. The input end of the FPGA module is connected with an ISP image signal processor, and the input endof the ISP image signal processor is connected with an image sensor. The ISP image signal processor is an ISP image signal processor AP0101AT produced by the Aptina company, and the image sensor is an image sensor AR0132AT produced by the Aptina company. Accurate synchronization of transmission of a plurality of video streams can be ensured, multi-terminal splicing is facilitated, the field wiring cost of the network video monitoring terminal is reduced, the dynamic range is large, the quality of network video monitoring pictures is ensured, the practicability is high, and the popularizationand application value is high.

Description

technical field [0001] The invention belongs to the technical field of network video monitoring, in particular to an underground network video monitoring terminal circuit in coal mines. Background technique [0002] In the United States, coal mines have achieved a high degree of mechanization. There are few underground workers, the operation is standardized, and the roadway is unobstructed. Once an accident occurs, it is easy to evacuate and there are few casualties. In my country, however, the degree of mechanization of coal mining is only 45%, and a large part of the miners are migrant workers with low educational level and limited training, and there are even serious violations such as smoking underground. Such numerous miners are prone to accidents in highly dangerous operating environments, causing heavy casualties. The reasons for important coal mine accidents are mainly reflected in: the information communication between ground and underground personnel is not timely...

AI Technical Summary

Problems solved by technology

Video splicing by multiple terminals has the problem of time asynchrony, and true seamless splicing cannot be achieved

[0004] 2. The working temperature range is narrow, and the high temperature environment cannot work normally

[0005] 3. High wiring cost

The current network video surveillance wiring in coal mines uses optical fiber or flame-retardant network cables, which are expensive and not conducive to large-scale use

[0006] 4. The dynamic range of the network video monitoring terminal circuit is not enough

The dynamic range of the current network video surveillance terminals in underground coal mines is generally less than 90db. If the installation location of the monitoring terminal is not selected properly, it is easy to have insufficient dynamic range. At the same time, there are problems of partial underexposure and partial overexposure, which affect the quality of the surveillance images.

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