Research On Low Power Consumption Of Embedded Wireless Network Video Surveillance Equipment

In recent years,with the widespread popularity of embedded terminal devices represented by smart phones and tablet computers,traditional users have experienced a transition from computer terminals to mobile terminals,and application scenarios have become more and more diverse.The embedded operating system is characterized by its open source,free,complete,convenient development,and optimization for embedded devices.At the same time,it has a large community group,which is favored by developers and attracts a large number of users in the field of intelligent terminal operating systems.The advent of the Internet of Things has made all kinds of embedded devices flood people's lives.Among them,monitoring devices are everywhere,such as security systems,smart home systems,and so on.For increasingly diverse application scenarios,embedded devices that continue to rely on wiring power supply are obviously not realistic.For example,a simple method is to use battery power supply,at this time the requirements for power consumption are particularly important.Aiming at the network video monitoring equipment in this application scenario,this subject studied a relatively feasible low power consumption scheme,and compared the power consumption before and after adopting this scheme through test data to verify the feasibility of the scheme.The specific research starts from two aspects:(1)Power consumption control of the whole device.The hardware platform used in this solution is TIPS with MIPS architecture as the main control,STM32 as the MCU,and ESP8266 as the main system composed of WIFI modules.The control chip is turned off,the MCU remains in standby,the WIFI module maintains a low power consumption mode,and when the user opens the APP to use the monitoring device,the main control chip and the MCU are awakened through the network wake-up method to achieve long-term battery life.(2)After the overall power consumption of the device is controlled,continue to deeply control the power consumption of the main power consumption source WIFI module.This part of the work will be studied from the two levels of software and hardware.From the perspective of controlling the working time of the WIFI module at the software level,following the definition of low-power operation in the 802.11 protocol,a working mechanism of monitoring cycle based on beacon interval is designed,and the efficiency and response delay are saved by comprehensively considering power consumption,Giving a relatively ideal monitoring period;using a directional antenna instead of an omnidirectional antenna at the hardware level to achieve power saving,and designed an L-shaped probe feed with a reasonable size for embedded network video surveillance equipment An electric microstrip antenna model,and the performance parameters of the antenna are given by simulation of the model.At the end,the actual directional antenna is displayed,and the performance of the directional antenna is selected on the market,and compared with the omnidirectional antenna common in the embedded end to verify the practicality of this directional antenna in embedded wireless network video surveillance equipment.