Results 11 to 20 of about 2,478 (227)
Design of current limiting starting circuit with thermal protection function
Meikuang Anquan, 2021 The circuit of mine intrinsically safe equipment has the risk of short-circuit failure, the chip surface temperature in current-limiting start circuit rises sharply, and the excessively high surface temperature of device leads to the failure of the ...
HUANG Chun, WU Yincheng, LI Yiwen
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Negative pressure automatic water discharge device based on intrinsically safe DC electric valve
Meikuang Anquan, 2021 A negative pressure automatic drainer based on intrinsically safe DC electric valve is designed. Through the design of the drive circuit, protection circuit and control program of the DC electric valve, the 24 V intrinsic safe DC power supply provided ...
WANG Zuxun
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A mine intrinsically safe audio and video recorder
Meikuang Anquan, 2023 A mine intrinsically safe audio and video recorder is designed. The device is based on 5G SOC processor, and adopts the photosensitive sensor + white light/infrared laser fill light + intrinsically safe circuit scheme.
LI Wenfeng, WANG Qian, LIU Bin, LIU Kai, LI Qiang
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Optimization Design of Intrinsic Safety Pilot Circuit for Motor Remote Start and Stop
Meikuang Anquan, 2020 This paper introduces the types of remote starting and stopping pilot circuits of existing motors, the existence of mis-starting, the inability to identify all line faults and the unstable operation of power supply voltage reduction, and proposes an ...
ZHANG Yuxiang, SONG Jiancheng, TIAN Muqin
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Safety analysis of half wave oscillator structure in underground 5G radiation field
Gong-kuang zidonghua, 2023 GB 3836.1-2021 Explosive atmospheres - Part 1: Equipment-General requirements stipulates that the RF threshold power of RF equipment in explosive environments shall not exceed 6 W.
TIAN Zijian +4 more
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Sensitivity analysis of IEC spark test apparatus
Meikuang Anquan, 2021 The sensitivity of spark test apparatus is affected by environmental factors, tungsten wire electrode and cadmium disk electrode. In this paper, the intersection / separation trajectories of tungsten wire electrode and cadmium disk electrode in a test ...
ZHANG Yong
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Development of data acquisition instrument for coal and gas outburst based on wireless communication
Meikuang Anquan, 2022 Aiming at the problem of long measuring time and low efficiency of K1 value measuring instrument for drilling cuttings gas desorption index used in coal mine at present, based on the related requirements of prevention and control of coal and gas ...
WANG Yanbin
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Transient analysis of surge immunity test for intrinsically safe sensor
Gong-kuang zidonghua, 2018 For problem that it was difficult to achieve evaluation grade A due to a long time reverse gap in DC power port voltage of intrinsically safe sensor in positive surge immunity test, taking a typical mine-used intrinsically safe methane sensor as research
ZHANG Ziliang
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Gong-kuang zidonghua, 2017 In view of poor real-time performance and complex wiring existed in traditional operating condition monitoring of coal mine mechanical and electrical equipment, a mine-used intrinsically safe equipment monitoring substation based on wireless ...
DU Yan +7 more
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Audio and Video System for Mine Search and Rescue Robot Based on Linux
Meikuang Anquan, 2020 The audio and video system of mine search and rescue robot is designed based on the Linux. The system selects a 1/2.7 inch CMOS USB binocular camera, BH1750 light intensity acquisition and 850 nm infrared compensation light as the video acquisition ...
LI Wenfeng, BAI Juntao
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