RU2622471C1 - Method for the identification of the fact of exposure of a powerful non-mode magnet to the counter of the municipal resource - Google Patents

Abstract

FIELD: physics.

SUBSTANCE: method for detecting the fact effects the powerful neodymium magnet counter public resource, consists in the fact that in the design of the counter at locations most sensitive to the magnetic field action, either around the inner perimeter mounted one or more inductor particular shape so that plane coil is parallel to the body of the counter with a minimum distance therebetween, whereas the magnetic flux in the inductor is changed, EMF induction and induction current are generated, which are fixed at the smart meter in the nonvolatile memory with the output to the liquid crystal indicator in the form of a dumb counter actuated indicator light.

EFFECT: increasing the accuracy of detecting the impact of a utility resource on the meter.

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Description

The method relates to the field of metrology, in particular to the accuracy of measuring the values of consumed communal resources. Analogues of the invention to the applicant are unknown.

The basis of the invention is the task of creating a method for detecting the fact of the effect of a powerful neodymium magnet on the communal resource counter, which ensures that the fact that a strong magnetic field acts on the meter is applied to distort the actual consumption of the consumed resource.

The specified technical result is achieved by the fact that one or more inductors of a certain shape are installed in the meter’s design at the places most sensitive to the magnetic field or along the entire inner perimeter so that the plane of the coil is parallel to the meter’s body with a minimum distance between them.

For various types of counters, the places most sensitive to the action of a magnetic field are: a counting mechanism, flow meters, gearboxes, tachometers, built-in measuring transformers, etc.

The shape of the inductor depends on the type of meter and can take the form of any geometric shape with the cross-sectional area of the coil allowed by the internal space of the meter at the installation site, with the number of turns (N) and the need to use a core made of ferromagnetic material according to the calculation, so that the condition - the value created in when the magnetic flux (Ф) is changed by the action of a powerful neodymium magnet passing through an area limited by a turn (S), the emf of induction (Eind.) was greater than or equal to second minimum value of voltage sensitivity (Uch.d.) voltage sensor, or voltage circuits "base - emitter" (Ub.e.) transistor, the conductor section of the coil windings on the magnitude of the EMF generated by induction is not affected,

Eind. = N * ΔФ / Δt, Ф = B * S * sinϕ, and Eind.

where B is the magnetic induction of the magnet used;

ϕ is the angle of inclination between the direction vector of the magnetic induction and the cross-sectional area of the coil coil;

when the magnetic flux changes in the coil, an induction EMF and an induction current are created, which are fixed at the smart meter in non-volatile memory with output to the liquid crystal indicator (Fig. 1), and at the non-smart meter in the form of a triggered light indicator (Fig. 2).

The drawings show:

In FIG. 1 shows: 1 - inductor; 2 - voltage sensor; 3 - analog-to-digital Converter; 4 - microcontroller; 5 - non-volatile memory; 6 - liquid crystal indicator.

In FIG. 2 shows: 1 - inductor; 7 - transistor; 8 - thyristor; 9 - lithium battery; 10 - light indicator; 11 - normally closed contact; 12 - resistor.

A method for detecting the fact of the effect of a powerful neodymium magnet on the communal resource counter, which consists in installing one or more induction coils of a certain shape in such a way that the plane of the coil turns at the places most sensitive to the action of the magnetic field or around the entire internal perimeter located parallel to the meter body with a minimum distance between them and electrically connected to the elements of FIG. 1 or FIG. 2, depending on the type of counter, then when a powerful neodymium magnet approaches this point of the counter outside, a changing magnetic flux creates an induction EMF and an induction current in the inductor (1), when the magnet stops, the magnetic flux through the coil turns remains unchanged and the induction EMF disappears.

But by this time, the smart meter (Fig. 1) has a voltage sensor (2) that responds to the induced induction emf (Unit ≥ ≥U.ch.) and transfers the voltage to the analog-to-digital converter (3), which in turn converts the instantaneous value an analog sensor signal into a digital code, the value of the digital code goes to the microcontroller (4), and from there to the liquid crystal display (6) and non-volatile memory (5), where it is recorded as a fact of exposure.

In a non-intelligent counter (Fig. 2), the induced induction EMF (Und.≥Ub.e.), acting on the base-emitter circuit, opens the pn junction of the transistor (7), in the thyristor (8) control electrode-anode circuit; a direct current of the lithium element (9) occurs, opening the pn junction of the thyristor (8), the light indicator (10) is activated. Next, the p-n junction of the transistor (7) is closed, because The induction EMF disappears, and the p-n junction of the thyristor (8) remains open and the indicator light (10) indicates the fact of the action of the magnet, until the circuit breaks with a normally-closed contact (11). The indicator light (10) for visual contact, the lithium element (9) for possible replacement, and the normally-closed contact button (11) for breaking the circuit should be displayed on the meter body from the outside, while the lithium cell socket cover (9) and the normal closed contact (11) must be sealed.

The direction of the magnetic flux, and also as a result of this, the polarity of the induction emf does not play a role when the poles of the magnet change. the fact of the effect of a magnetic field on the utility meter will be revealed if a powerful neodymium magnet is installed on the meter or if it is removed.

In the experimental reproduction of the technical result, the materials for FIG. 2: 1 - inductor (round shape with a diameter of 45 mm, consisting of 60 turns of a copper wire ∅ 0.29 mm, without a core; square with a side of 30 mm, consisting of 100 turns of a copper wire ∅ 0.2 mm, without a core; wound on a counting mechanism together with a stepping motor of an electric meter Ts36803V, consisting of 100 turns of copper wire ∅ 0.1 mm); 7 - transistor KT315; 8 - thyristor KU102; 9 - lithium cell 3 V; 10 - LED indicator light 2 V; 11 - normally closed contact; 12 - 51 ohm resistor; N38 neodymium magnet in the shape of a cylinder, diameter 45 mm, height 25 mm.

The technical result is achieved.

Claims (1)

A method for detecting the fact of the effect of a powerful neodymium magnet on the communal resource counter, which consists in installing one or more induction coils of a certain shape in such a way that the plane of the coil turns at the places most sensitive to the action of the magnetic field or around the entire internal perimeter located parallel to the meter body with a minimum distance between them, then when changing the magnetic flux in the inductor induction EMF and induction current, which is fixed at the smart meter in non-volatile memory with output to the liquid crystal indicator, at the non-smart meter in the form of an activated indicator light.

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