Handheld DC switching power supply output intrinsically safe detection method
A technology of DC switching and power output, which is applied in the field of intrinsic safety detection of hand-held DC switching power supply output, can solve the problems of cumbersome criteria and inconvenient use, and achieves the effect of simple circuit structure, improved reliability and convenient realization.
Active Publication Date: 2019-01-22
HAINAN NORMAL UNIV
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Problems solved by technology
[0005] Some researchers have made useful explorations on the non-explosive intrinsic safety evaluation of some DC switching converters, and also proposed some non-explosive intrinsic safety evaluation methods, but the proposed criteria are cumbersome, inconvenient to use and have great limitations.
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[0045] Such as figure 1 As shown, the hand-held DC switching power supply output intrinsically safe detector of the present invention includes a microcontroller module 1, a +5V power supply 2 and a +3.3V power supply circuit 3, and the microcontroller module 1 includes a DSP digital signal processor 1 -1 and a crystal oscillator circuit 1-2 and a reset circuit 1-3 connected with the DSP digital signal processor 1-1, the input terminal of the DSP digital signal processor 1-1 is connected with a key operation circuit 4 for parameter setting , the output terminal of the DSP digital signal processor 1-1 is connected with a liquid crystal display circuit 5 for displaying test results, and the DSP digital signal processor 1-1 and the key operation circuit 4 are all connected to the +3.3V power supply circuit 3 The output terminal is connected, the liquid crystal display circuit 5 is connected with the output terminal of the +5V power supply 2, and the output terminal of the +3.3V po...
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The present invention discloses a handheld direct-current switched power source output intrinsic safety detector. The handheld direct-current switched power source output intrinsic safety detector comprises a micro controller module, a + 5V power source and a + 3.3V power source circuit; the micro controller module comprises a DSP (digital signal processor) as well as a crystal oscillation circuit and a reset circuit which are connected with the DSP (digital signal processor); the input end of the DSP (digital signal processor) is connected with a key operation circuit; the output end of the DSP (digital signal processor) is connected with a liquid crystal display circuit; and the output end of the + 3.3V power source circuit is connected with an electrification indication lamp circuit. The invention also discloses a handheld direct-current switched power source output intrinsic safety detection method. The method includes the following steps of: 1, inputting parameters; 2, calculating minimum ignition energy WB; 3, calculating the spark energy Wsigma of the primary discharge of a direct-current switched power source; and 4, judging and displaying the output intrinsic safety of the direct-current switched power source. The handheld direct-current switched power source output intrinsic safety detector and detection method of the invention have the advantages of convenience in realization, high detection reliability, intuitive display, simple operation, low cost, wide application range and high practicability.
Description
technical field [0001] The invention belongs to the technical field of switching power supplies, and in particular relates to a method for detecting intrinsically safe output of a hand-held DC switching power supply. Background technique [0002] With the rapid development of production and management automation in flammable and explosive industries such as coal mines, petrochemicals and natural gas, DC switching power supplies have been more and more widely used in such industries. Relevant safety regulations stipulate that electrical and electronic equipment used in explosive hazardous environments must meet explosion-proof requirements. Intrinsically safe (referred to as intrinsically safe) type explosion-proof electrical and electronic equipment has the advantages of the highest degree of safety, the smallest size and the lowest cost. Therefore, the intrinsically safe type of electrical and electronic equipment used in explosive hazardous areas is always preferred. Corr...
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IPC IPC(8): G01R31/40
CPCG01R31/40
Inventor 钟久明颜丽娜刘汉军吴伟罗华珍
Owner HAINAN NORMAL UNIV