Electricity safety inspection system and method thereof
A safe and home-use technology, applied in the direction of measuring electrical variables, measuring resistance/reactance/impedance, measuring devices, etc., can solve problems such as wiring crises that cannot be predicted in advance, and achieve the effect of avoiding electricity safety
Inactive Publication Date: 2011-05-18
POWERTECH INDAL
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[0005] However, the devices for protecting the circuit all belong to passive safety devices, that is to say, the above-mentioned devices will only function negatively at the critical point where a hazardous event occurs; To put it bluntly, the device is a way to treat the symptoms rather than the root cause, and it is still impossible to predict in advance whether there is a potential crisis in this wiring
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[0035] Please refer to Fig. 1, the present invention provides an electricity safety detection system 1, which can be used to detect the impedance of a household wiring to show the quality of the household wiring, the electricity safety detection system 1 has a plug to A mains socket 100 for the household wiring is provided. The electrical safety detection system 1 includes: a first amplification and rectification circuit unit 11, which is used to measure a first voltage waveform a of the household wiring under zero load (no load); a signal acquisition unit 12 , which includes: a switching element (MOSFET, IGBT, driven switch, etc.) unit U1 and a first predetermined resistor R1; a second amplification and rectification circuit unit 13, which is coupled to the signal acquisition unit 12, wherein the The second amplifying and rectifying circuit unit 13 is used to convert the tiny voltage waveform into a second voltage waveform b; and a processor unit 14 is used to compare the fir...
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The invention relates to an electricity safety inspection system, which is characterized by comprising the following steps: inserting the electricity safety inspection system in a commercial power socket of household wires; measuring the first voltage waveform of the household wires under the condition of no load by a first amplifying and rectifying circuit unit; starting a preset instant periodic current signal by a signal seizing unit through a drive circuit; converting an instant load current signal into the second voltage waveform by a second amplifying and rectifying circuit unit; and comparing the first voltage waveform with the second voltage waveform to obtain a comparison result by a processor unit, so the quality of the household wires can be displayed by an resistance value to further improve the safety of household electricity.
Description
technical field [0001] The invention relates to a detection system and method for electricity safety, in particular to a detection system and method capable of actively measuring the quality of household wiring. Background technique [0002] For modern people, "using electricity" has become a part of daily life, and electricity is an indispensable power source for modern life. The contribution of electricity to our life is undoubted, but improper use of electricity will not only cause inconvenience, but also lead to disasters, even fatal. [0003] The so-called "overload" and "short circuit" phenomena often cause dangerous safety incidents in electricity use. Generally speaking, the current flowing through the wire has its own safety capacity limit. For example, if the specification of the extension wire is marked "125V, 15A", it means that the maximum power supply voltage that can be connected is 125V, and the maximum safe total current that can be tolerated is 15A. If t...
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IPC IPC(8): G01R31/08G01R27/02
Inventor 李裕隆
Owner POWERTECH INDAL