Crown number of the crown category. Inventor

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"CROWN" NUMBER OF THE CROWN DISCHARGE

And then an inventor appeared (TRIZ)

Books and articles / And then came the inventor

TRIZ. Corona rank number

In physics textbooks, effects and phenomena are described, so to speak, in a neutral way: when heated, bodies expand ... and that's it. And if the same effects are stated "in an inventive way"? For example: "When heated, bodies expand, therefore, this phenomenon can be used in all cases where it is required to carry out small, but very accurate movements of bodies." If you work through all the physics textbooks from the sixth to the tenth grade in this way, you get a set of very powerful tools - a guide to the application of physical effects and phenomena.

Let us take as an example the description of a corona discharge in a textbook for the tenth grade: “At atmospheric pressure, in highly inhomogeneous electric fields, a discharge is observed, the luminous region of which often resembles a corona. Therefore, it was called corona. The charge density on the conductor surface is the greater, the greater its curvature. The charge density is maximum at the tip, so a strong electric field arises near the tip, when its intensity exceeds 3x10⁶ V / m, there comes a discharge. At such a high field strength, ionization by electron impact occurs at atmospheric pressure. As you move away from the surface of the conductor, the intensity decreases rapidly. Therefore, ionization and the gas glow associated with it are observed in a limited region of space. Corona discharge has to be considered when dealing with high voltage. If there are protruding parts or very thin wires, a corona discharge can start."

So, the corona depends on the composition and pressure of the gas surrounding the wire. This means that we have found a solution to problem 1 - about measuring the pressure of a gas inside an electric lamp. If a high voltage is applied to the filament, a corona discharge occurs, the brightness of which will depend on the pressure of the gas.

Let's go back to the textbook. Corona discharge causes gas ionization. If there are particles of powder, dust, small droplets in the gas, the ions will "stick" to them. Therefore, corona discharge allows particles of solid and liquid matter to be charged. And charged particles are easy to manipulate. Corona discharge can be used to clean gas from dust, to dose particles suspended in a gas flow, to move various powders, to determine impurities in a gas, etc. Obtaining charged particles is the main, "corona" number of a corona discharge.

As you can see, a simple, in general, physical phenomenon is fraught with rich inventive possibilities.

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