RU2281558C2 - Method for guarding object being controlled and device for realization of said method - Google Patents

Abstract

FIELD: engineering of guarding equipment, namely, engineering of capacitive devices of guarding alarm system in case of shifting of position of object being controlled (within broad ranges of weight and dimensions), for example, museum exhibit or any other object.

SUBSTANCE: method for guarding object being controlled, interacting with guarding device, including sensitive element and block for processing signals includes mating sensitive element with object being controlled, recording boundary values of state of sensitive element together with object being controlled in guarding device and with receipt of alarming notification from guarding device in case of shift in position of object being controlled, while object being controlled is freely positioned on sensitive element in form of flat capacitor with plate of thin-sheet metal in form of foil, foil is shaped to match dimensions of perimeter of at least one object being controlled, sensitive element together with object being controlled is connected to block for processing signals in form of transformer of electric capacitance to digital code.

EFFECT: simplification of method, expanded functional capabilities.

2 cl, 2 dwg

Description

The invention relates to technical means of protection, in particular to the operation of capacitive alarm devices in case of violation of the position of the controlled object (in wide ranges of weight and dimensions), for example, a museum exhibit or any other object.

A known sensor for monitoring the state of rest of an object, comprising a body of dielectric material, mounted on an object of control, inside of which are insulated conductors connected to external contacts, and a non-free rolling body with the possibility of shorting the conductors, is placed, see the patent for the invention of the Russian Federation No. 2064200 by class G 08 B 13/14, publ. 1996 year

A known displacement sensor having a sensor connected to a controlled object, and the processing unit of the output signal of the sensor, see certificate for utility model of the Russian Federation No. 9062 class. G 01 B 7/00, publ. 1999 year

A perimeter security alarm device is known that contains sensitive sensors in the form of a cable, a signal processing unit from sensitive sensors, and a signal output unit, see patent for utility model of the Russian Federation No. 37857, class. G 08 B 13/26, publ. 2004 year

A device for burglar alarms containing a sensor of the state of the guarded object, a signal conditioner "Alarm", connected to an audio signaling device, see certificate for utility model of the Russian Federation No. 11364 class. G 08 B 13/00, publ. 1999 year

A capacitive device for burglar alarms is known that contains a sensitive element in the form of a flat capacitor with two plates, the distance between which is less than their characteristic dimensions, with an elastic dielectric placed between them, see patent for invention of the Russian Federation No. 2010337 according to cl. G 08 B 13/26, publ. 1994

All known devices have a fairly simple implementation, but they do not have automatic tuning when processing signals, which reduces the reliability and accuracy of the alarm notification.

A known method of guarding a controlled object interacting with a security device including a sensitive element and a signal processing unit, namely, that the sensitive element is paired with the controlled object, the boundary values of the state of the sensitive element together with the controlled object are determined and adequate changes in their states are recorded by fixing them in the security alarm unit and with the receipt of a violation of the position of the controlled object from the security alarm unit niya, see the patent for the invention of the Russian Federation No. 2124757 by class. G 08 B 13/14, publ. 1999 year

This technical solution is taken as a prototype of the present invention.

However, it has disadvantages.

The prototype device contains a sensitive element made with pins and with a glued piezoelectric element, mounted in the sensor housing, the pins of the sensitive element pierce the mounting cord on which the controlled object is mounted, this complicates its design.

The presence of fasteners for fixing the sensor and the controlled item complicate the use of the prototype device.

After determining the boundaries of the protected area of the controlled object in the signal processing unit of the prototype, the boundary values of the amplitude and time parameters of the signals from the sensitive element are set, but the signal processing unit does not have automatic adjustment and does not provide tuning for various changes in the operation of the device, this reduces the reliability of signal processing.

The present invention is based on the solution of a problem that allows to simplify the use and constructive implementation of the device for the protection of objects, to expand its functionality and to ensure the reliability of signal processing.

According to the invention, this problem is solved due to the fact that the method of guarding a controlled object interacting with a security device including a sensitive element and a signal processing unit consists in matching the sensitive element with the controlled object and determining the boundary values of the state of the sensitive element together with the controlled object and adequate changes in their conditions with their fixing in the security alarm unit and with receipt in violation of the position of the controlled object from block alarm alarm notification; the controlled object is freely placed on the sensitive element in the form of a flat capacitor with a sheet of metal in the form of a foil, the foil is sized corresponding to the perimeter of at least one controlled object, the sensitive element is connected with the controlled object with an analog converter of the security alarm unit.

In addition, the foil is given a size corresponding to the perimeter of the location of at least one controlled item.

According to the invention, this problem is solved due to the fact that the security device of the controlled object includes a sensing element and a signal processing unit; the sensitive element is made in the form of a flat capacitor with a sheet of sheet metal in the form of a foil with a perimeter corresponding to the perimeter of at least one controlled object freely placed on it and connected to an analog converter in the form of a converter of electric capacitance into a digital code with automatic modules tuning to the own capacitance of the sensitive element and adaptive adjustment to external influences.

In addition, the foil is made with a perimeter corresponding to the perimeter of the location of at least one controlled object.

The applicant has not identified sources containing information about technical solutions identical to the present invention, which allows us to conclude that it meets the criterion of "novelty."

Due to the implementation of the distinguishing features of the invention (in conjunction with the features indicated in the restrictive part of the formula), important new properties of the object are achieved.

Free placement of the controlled object on the sensitive element simplifies the installation of the security device.

The implementation of the sensing element in the form of a flat capacitor with a lining of sheet metal in the form of a foil simplifies the design of the device.

The possibility of obtaining from foil a size corresponding to the perimeter of the controlled object, or a size corresponding to the perimeter of the location of the controlled object, simplify the use of the device and its design and expand the functionality.

The connection of the sensing element together with the controlled object with an analog converter provides the adjustment of signal processing.

The presence of an electric capacitance converter in a digital code with modules for automatically tuning to the own capacitance of the sensitive element and adaptive adjustment to external influences provides automatic adjustment of adequate changes to the device elements and increases the reliability of signal processing for generating an alarm notification.

The applicant is not aware of any publications that would contain information on the influence of the distinguishing features of the invention on the achieved technical result. In this regard, according to the applicant, it can be concluded that the claimed technical solution meets the criterion of "inventive step".

The invention is illustrated by drawings, which depict:

figure 1 is a structural diagram of a signal processing unit;

figure 2 is a sensitive element.

The security device of the controlled object contains a sensing element 1 and a signal processing unit 2.

Sensitive element 1 includes:

Top cover 3.

Lower cover 4.

Elastic dielectric 5.

Signal processing unit 2 includes:

Microprocessor 6.

Converter of electric capacity to digital code 7;

- module for automatic tuning to own capacity (sensitive element 1) 8;

- module adaptive adjustment to external influences 9.

Memory block 10.

Horn unit 11.

Light signaling unit 12.

Relay Output Block 13.

Case (block 2) 14.

Reception and control device 15.

Information block 16;

- interface module 17.

The sensitive element 1 is made in the form of a flat capacitor with upper 3 and lower 4 plates with an elastic dielectric 5 placed between them. The sensitive element 1 is made of sheet metal, for example, in the form of a foil, with the possibility of changing the structural dimensions corresponding to the perimeter of the controlled object. There can be several controlled objects, regardless of their perimeters and masses. The distance between the upper 3 and lower 4 plates is less than their characteristic dimensions and determines the thickness of the sensor 1. The thickness of the sensor 1, depending on its design and materials used, is from a fraction to a few millimeters. The capacity of the sensing element 1 depends on the area of the plates 3 and 4 and the thickness of the elastic dielectric 5.

The sensing element may be made sectional and have a repetition of the plates separated by an elastic dielectric (not shown).

The sensitive element, depending on the materials and purpose of use, can have a variable - soft construction or an unchangeable - rigid construction.

The sensitive element of an unchanged (rigid) design is performed in accordance with the required dimensions and the required shape.

The sensitive element 1 of a variable (soft) design is preferred. The use of a sensitive element 1 of a variable (soft) design provides the implementation of simultaneous control at the same level of sensitivity of objects with different masses.

The signal processing unit 2 includes a microprocessor 6, an electric capacitance to digital code 7 converter, a memory unit 10, sound 11 and light 12 signaling units, and a relay output unit 13. The electric capacitance to digital code 7 is configured with automatic tuning modules for its own capacitance 8 of the sensitive element 1 and adaptive adjustment to external influences 9. All elements 6, 7, 10, 11, 12 and 13 of the signal processing unit 2 are placed in a single housing 14.

The converter of the electric capacitance to digital code 7 is connected to the sensing element 1. The converter of the electric capacitance to digital code 7 is connected to the microprocessor 6. The microprocessor 6 is connected to the memory unit 10 and connected to the sound blocks 11 and light 12 of the alarm and the relay output block 14. Relay block outputs 14 is connected to the control panel 15. The microprocessor 6 is connected to the information block 16 by means of the module 17. The information block 16 is made, for example, in the form of a personal computer (with m software).

A method of protecting a controlled item using a device for its implementation is as follows.

The sensitive element 1 of a variable soft design, for example, is attached with scissors to a size corresponding to the perimeter of the controlled object or the perimeter of the placement of the controlled objects. If necessary, the cut-out sensitive element 1 can be draped in accordance with the design requirements.

The controlled object is freely mounted on the sensing element 1. Out of the field of view, the signal processing unit 2 is fixed and connected to the sensing element 1.

The minimum weight of the controlled item depends on the materials used and the design of the sensitive element 1 and is hundreds of milligrams. The maximum mass of the protected controlled object is practically unlimited and is determined by the strength of the design of the sensitive element 1.

When exposed to a controlled object (removing, colliding, replacing one object with another, etc.), the pressure exerted by the object on the sensitive element 1 changes, while the capacitance of the sensitive element 1 changes. The sensitivity of the device does not depend on the capacity of the sensitive element 1 and device supply voltage. The signal processing unit 2 detects a change in the capacitance of the sensing element 1 and generates an alarm notification to the control panel 15. Due to the modules 8 and 9, the device automatically adjusts to the electric capacitance of the sensing element 1, as well as changes in the capacitance of the sensing element 1 caused by controlled objects, as well as changes caused by climatic conditions and electromagnetic interference during operation.

Also, the signal processing unit can generate a notification of a device malfunction in the following cases:

- open circuit and short circuit in the sensing element and connecting wires;

- excess of the maximum allowable capacity of the sensing element;

- reducing the supply voltage of the signal processing unit below the minimum allowable.

The proposed device for guarding a controlled item was manufactured industrially by ALPRO LLC, tests of the experimental batch showed positive functioning results, this determines, according to the applicant, its compliance with the criterion of "industrial applicability".

The proposed method for protecting a controlled item and device for it allow:

- to simplify the installation of the security device due to the free placement of the controlled object on the sensitive element;

- to simplify the design of the device by performing a sensitive element in the form of a flat capacitor with a sheet of sheet metal in the form of a foil;

- to simplify the use of the device, simplify its design and expand the functionality due to the possibility of obtaining from foil the size corresponding to the perimeter of the controlled object, or the size corresponding to the perimeter of the location of the controlled object;

- to provide adjustment of signal processing due to the connection of the sensitive element together with the controlled object with an analog converter;

- to provide automatic adjustment of adequate changes to the elements of the device and to increase the reliability of signal processing by performing the converter of the electric capacitance into a digital code with modules for automatic tuning to the own capacitance of the sensitive element and adaptive adjustment to external influences.

Claims (4)

1. The method of protection of the controlled object, interacting with the security device, including the sensitive element and the signal processing unit, namely, that the sensitive element is paired with the controlled object and the boundary values of the state of the sensitive element together with the controlled object are fixed in the security device when the position of the controlled the object receive an alarm message from the security device, characterized in that the controlled object is freely placed on a sensitive an element in the form of a flat capacitor with plates of sheet metal in the form of a foil, which is given a size corresponding to the perimeter of at least one controlled object, while the sensitive element together with the controlled object is connected to the signal processing unit in the form of an electric capacitance to digital code converter . 2. The method of protection of a controlled item according to claim 1, characterized in that the foil is given a size corresponding to the perimeter of the location of at least one controlled object. 3. The security device of the controlled object, including a sensitive element and a signal processing unit, characterized in that the sensitive element is made in the form of a flat capacitor with plates of sheet metal in the form of a foil with a perimeter corresponding to the perimeter of at least one freely placed on a flat capacitor subject, while the sensitive element is connected to the signal processing unit, made in the form of a converter of electrical capacitance into a digital code. 4. The security device of the controlled object according to claim 3, characterized in that the foil is made with a perimeter corresponding to the perimeter of the location of at least one controlled object.

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