Something is: Communication And Information Technology Module Tutor
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Communication And Information Technology Module Tutor Video
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The present invention relates to phase-detection electronic technology field, especially eTchnology to a kind of line of electric force phase detection device and method of widespread use in electric power detects. The present invention is directed to above-mentioned prior art problem, a kind of line of electric force phase-detection technology based on zero passage detection technology of proposition of innovation, taking the zero passage moment as time reference, on line of electric force to be measured, allow sense terminals equipment send information in the zero passage moment, then receive information in the power distribution terminal of known three facies relationships, and according to the difference of believing zero duration in Communication And Information Technology Module Tutor power line, accurately judge sense terminals Communidation on which phase line of electric force and the phase information of line of electric force of living in.
It is as follows that the present invention solves the problems of the technologies described above taked technical scheme:.
Further according to line of electric force phase detection device of the present invention, between wherein said sense terminals and data concentrator, carry out communication based on low voltage power line carrier mode closely, the information that described data concentrator comprises receives communication module and zero passage detection module is connected on a common line of electric force. Further according to line of electric force phase detection device of the present invention, between wherein Communication And Information Technology Module Tutor sense terminals and data concentrator, carry out communication based on remote low voltage power line carrier mode, and in described data concentrator, include three groups of information and receive communication module and zero passage detection module, be connected on three live wire line of electric force between centralized power distribution, the output terminal that each information receives communication module and zero passage detection module is all connected in described MCU.
The line of electric force method for detecting phases carrying out based on line of electric force phase detection device of the present invention, comprising following steps:.
Moodule 1, between centralized power distribution, the phase place of each line of electric force is demarcated in actual measurement, and the zero passage detection module in data concentrator is connected on the line of electric force of a certain particular phases. Step 2, between centralized power distribution, the corresponding standard of the fixing duration detection communication signal of actual measurement is believed zero duration value t, Thtor sense terminals and described zero passage detection module are connected on same phase line of electric force, and send and detect communication signal by sense terminals in the voltage zero-cross moment of described line of electric force, then receive communication module by the information in data concentrator and receive described detection communication signal, and calculate by the MCU in data concentrator that described information receives that moment Cimmunication described zero passage detection module that communication module receives described detection communication signal detects Communication And Information Technology Module Tutor the time span between next zero passage moment of line of electric force, believe zero duration value t as described standard.
Step 3, believe zero passage interval and the transmission error between zero duration value t, each line of electric force according to the determined standard of step 2, preset standard decision content in storer. Step 4, described sense terminals is connected in the single-phase electricity line of force to be measured at user side, and send and detect communication Communication And Information Technology Module Tutor in the voltage zero-cross moment of line of electric force, then receive communication module by the information in described data concentrator and receive described detection communication signal, and calculate by the MCU in data concentrator that described information receives that moment https://amazonia.fiocruz.br/scdp/essay/essay-writing-format-cbse-class-12/significance-of-the-treaty-of-versailles.php the zero passage detection module in data concentrator that communication module receives described detection communication signal detects connect the time span between next zero passage moment of line of electric force, as letter zero duration of zero passage detection line of electric force that module connects.
MCU in step 5, described data concentrator is by link comparing standard determination value default in the zero Moodule numerical value of the letter in step 4 and storer, judges line of electric force that sense terminals The Prediabetes On Growth And line of electric force connects for described zero passage detection module or has the line of electric force of given phase relation with zero passage detection line of electric force that module is connected.
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At least can reach following technique effect by technical scheme of the present invention:. Accompanying drawing 1 is the zero passage interval schematic diagram between existing three-phase alternating current. Accompanying drawing 2 is the structural principle schematic diagram of line of electric force phase detection device of the present invention. Accompanying drawing 3 is one of them embodiment structural representation of line of electric force phase detection device of the present invention.
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Below in conjunction with accompanying drawing, technical scheme of the present invention is described in detail, so that those skilled in the art can more clearly understand the solution of the present invention, but does not therefore limit the scope of the invention. Below know-why of the present invention and line of electric force method for detecting phases of the present invention are described in detail.
For any existing communication modes, preferred as low voltage power line carrier communication modes, wireless communication mode, it sends, receives the packets of information of regular length, and the time span spending is also certain. For convenience, the present invention will send information or complete moment of reception Communication And Information Technology Module Tutor, time interval length to next zero crossing is defined as " letter zero duration ", that is to say " the letter zero duration " implication described in the present invention be transmission information or reception information complete time be carved into the time interval length between next zero passage moment of corresponding phase line.
Line of electric force method for detecting phases of the present invention specifically comprises the following steps:.]
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