SU945825A1 - Electrode for measuring non-metal material electrization degree - Google Patents

Description

one

This invention relates to electrical measuring technology.

A known electrode for the induction of static electricity by friction, made in the form of a segment coated with friction material, the removal of electrical charge by an induction method during reciprocation of the sample under study l.

The disadvantage of the electrode is cycling: the personality of the electrical charge measurement, resulting in a charge leakage between the accumulation of the charge and its discharge to a grounded contact, which greatly reduces the sensitivity of the measurement. The presence of contact connections also reduces the reliability of the electrode.

An electrode is also known for measuring the degree of electrification of non-metallic materials, comprising a conductive element mounted for movement along the surface of the test sample 2.

However, the known electrode has a low sensitivity, since its working surface is quickly contaminated due to the fact that the nonmetallic test material generates an aerosol during friction, which fits tightly to the electrode. Due to the contamination of the electrode, especially electrically conductive aerosols, as well as the wear of its own working surface, its technical characteristics change.

) 5 The purpose of the invention is to increase the sensitivity of the electrode.

To do this, in the conductor of the sem element, on the side of its working surface, a groove is made, in which

20 a radioactively activated isotope metal plate, isolated from the conductive element.

FIG. 1 shows the design of the electrode; in fig. 2 is a view A of FIG. one.

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An electrode for measuring the degree of electrification of non-metallic materials contains a conductive element 1 mounted to move along the surface of the test sample 2. In the conductive element 1, a groove 3 is made on the side of its working surface in which a metal plate 4 activated by a radioactive isotope is placed conductive element 1 using an insulator 5. To protect the surface of an active radioisotope metal plate 4 from contamination and mechanically damage when the electrode is in the idle state, the groove 3 is closed 6.Elektroizmeritelny valve device (not shown) is connected by one pole to the present conductive member 1 and the other - to the activated radioisotope metal plate 4,

The electrode works as follows.

In the case of a flat electrode, it is installed in the system, leading it (or the sample) to a state of reciprocating motion. The direction of movement is set perpendicular to the working plane of the groove 3, in which insulator 5 is mounted and a metal plate 4 activated by a radioactive isotope. and sample 2 — a radioactive isotope-activated metal 1H plate 4 — an electrical measuring instrument.

In the case of an electrode made in the form of a cylinder or a segment, its grooves 3 are made in a circle of a curved surface. In this case, the electrode is activated by imparting eK-iy either a rotational or oscillatory motion, or by advancing

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its working surface of the test sample itself 2.

The charge density of the test sample 2 is calculated by the formula 5

ffg

where O is the charge density, K / m;

1 - measured current; V is the speed of movement of the electrode

or test sample 2, m / s; TO is the width of the test sample 2, m. The use of the invention increases the stability and sensitivity of measurement, since the dissipation time of a charge excited on the surface 2 of test sample 2 is minimal, and less complex and expensive electric meters can be used to measure the amount of static electricity. instruments compared to electrostatic field meters.

The electrode is simple and reliable in operation, in addition, it can be sky full of dimensions and weight.

Claims (2)

1. USSR author's certificate number 436299, cl. GO1 R 29/12, 1973. 2. Author's USSR certificate number 493OS2, cl. GO1R 29 / 12,1976 (prototype). uz.i View A one /