It is no secret that the IPhone or iPad can be used not only to work with electronic documents or games, these devices in the presence of the right software can be useful in everyday life: compass-for navigation, gyroscope-to determine the angle of the surface, Flash-like a light source, camera-like a video nanny. The guys from Power App decided to adapt magnetometer to IPhone and iPad for household needs. Whether the attempt in the application Power Line Detector, let's look... Having a direct relationship to electrical systems and electricity (I have a speciality of an electrical engineer), I was curious whether Power Line Detector is working the way the developer says on the app page of the application Store, because even Specialized devices are not always able to efficiently determine the wiring route.
From the physics course it is known that electric current is the directional movement of charged particles (depending on the environment it can be electrons or ions). In flow of electric current, in addition to energy transfer and heating conductor, a magnetic field is created around it. So we decided in Power app to create an application for IPhone and IPad, which would allow to determine the path through which the electric current (wiring). The idea is correct and useful, but as practice shows, it is not always possible to implement a working tool with the necessary accuracy.
The application is intended for search of the unshielded wires laid in walls on which the electric current flows. I draw your attention that the application is useless when searching for shielded wires, in which in addition to multi-layer insulation There is also a screen that protects conductive parts from high-frequency interference. The developer has honestly warned about this on the app page in the app Store-Credit! For Power Line Detector There is one more condition-your device should not be covered with covers, bumpers or other means of protection against mechanical damages in the design of which there are metallic or magnetic parts which influence on Operation of the magnetic field sensor in the machine.
the preparation is done, the IPAD is unprotected, run the application, bring to the place on the wall, where exactly laid wiring and... The result is negative. The application has not detected a magnetic field and you can infer that there are no transactions in this location.
Apparently the author of the application description in the app Store forgot to mention one more condition: the magnetic field is created (and therefore it can theoretically be defined) only at flow of an electric current, that is when the electric circuit is closed, for example, in a socket The appliance is connected and it is on (running).
It is senseless to look for a wire that feeds an electrical outlet into which a working appliance is not connected. At idle (if not to take into account parasitic currents or leakage currents) The wiring route is very difficult to define and do it with the help of IPhone or IPad. Okay, I plugged in a powerful electrical appliance to cause the electrical current to flow in the wire from the source to the load. And what do you think? When setting the sensitivity in Power Line Detector by default, the device again did not determine the location of the wiring. Dancing with a tambourine with sensitivity and calibration The situation was corrected a little, the iPad began to react to the approach to the place of laying the electric wire under load, but the error of several meters negates all attempts, because such measurements Useless.
In Power Line Detector It is possible to change the indicator of a magnetic field-it can be either an incandescent bulb which at definition of a magnetic field lights up, or an analogue dial indicator. The calibration button can be set to the level of the magnetic background at the distance from the wall, with the intensity of the magnetic field exceeding the natural background by a certain value, the indicator in the Power Line Detector notifies about it, but to judge that in the place to which you Have brought the device precisely laid electric wires I wouldn't.
As practice has shown, Power Line Detector is useless, and if it measures the magnetic field, it is not the fact that it is generated by electric current, and the measurement error is higher than the permissible limits. the application could be set as an experiment.
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