RU2582075C1 - Metal detector on heterodyne receiver using high discrimination system - Google Patents

Abstract

FIELD: electronics.

SUBSTANCE: invention relates to electronics and electrical engineering and can be used to search for any types of metal in ground, air and in any non-electroconductive medium. Said result is achieved due to that a metal detector comprises a pulse generator, a heterodyne receiver with expanded discrimination system, a switch, a search coil, a programmable microprocessor, an analyser, an indication unit, two solar panels and a battery connected to each other in a certain manner.

EFFECT: technical result is possibility to determine specific type of metal with reduced power consumption.

1 cl, 1 dwg

Description

A heterodyne detector with a high discrimination system.

The invention relates to the field of electronics and electrical engineering and can be used to search for any kind of metal in the earth, air and in any non-conductive electricity medium.

Famous for their practical use are devices of this type that separate only ferrous and non-ferrous metals (FM, BFO, OR metal detectors, etc.) [1].

The disadvantages of these devices are:

1. Weak discrimination (Metal detector discrimination - this is a function that allows you to distinguish (recognize) detected objects by the type of metal and classify them in a very specific way [2]);

2. These devices can only distinguish ferrous and non-ferrous metals, which is extremely inconvenient for the operator;

3. These devices are very little functional;

4. High electricity consumption.

The closest in technical essence is the metal detector AKA "SIGNUM 7272", which works on the principle of "transmission-reception" [3].

The use of such devices is limited to the search for metals in depth

coin (soviet) 20-25 cm helmet 40-70 cm Luke 1,5-2 m

without the ability to determine the type of metal, as well as fairly capacious power consumption.

The objective of the invention is to create a device that could distinguish not only ferrous metal from non-ferrous, but also be able to specify them, for example: aluminum, copper, silver, etc., by setting the data on the electrical conductivity of each metal in a programmable microprocessor, while as much as possible reducing power consumption.

The desired result is achieved by the fact that the device circuit is built on a computerized basis, i.e. in fact, the proposed device has its own random access memory (OP) (there are also imported samples that have OP, but the level of discrimination is far from desired). And most importantly, in the proposed device, along with a pulse generator, a switch, a search coil, an analyzer, an indication unit and a battery, there is a heterodyne receiver with an extended discrimination system, two solar panels and a programmable microprocessor, which can be set up with advanced settings.

By installing two solar panels operating in parallel with the battery, which will turn on in cloudy weather, power consumption will be reduced.

In contrast to the Signum 7272 AKA, the heterodyne receiver using the increased discrimination system uses an enhanced noise immunity from debris, as well as a programmable microprocessor in conjunction with an analyzer, which allows to obtain more information about the item found. It also uses only one coil (and not two) which is both receiving and transmitting.

The invention is illustrated in the drawing, FIG. 1, where:

1 - pulse generator

2 - heterodyne receiver with extended discrimination system

3 - switch

4 - search coil

5 - programmable microprocessor

6 - analyzer

7 - display unit

8 - solar battery

9 - solar battery

10 - battery

A metal detector at a heterodyne receiver using a high discrimination system operates as follows:

1 generates a pulsed signal, which is transmitted to 4, where an alternating magnetic field is formed, 2 reduces interference from minerals and "hot" stones by strong discrimination, 3 allows you to use only one coil, which will receive and transmit a signal one by one, 4 is the main element device, it by penetrating the magnetic flux into the conductive medium captures metal objects and transmits a signal to 5, which in turn analyzes it and establishes the metal to be black or non-ferrous . (The device uses a standard CISC programmable microprocessor, which consists of two parts: a signal processing unit and a microprogram control unit. The main principle of its operation is the presence of a synchronization circuit. The signal, like the power circuit, is connected to any register of a digital device. The signal processing unit is designed to reading commands from the system memory and executing read commands, which he performs under the control of the microprogram control unit, which forms a sequence microcommands necessary to execute command [4]. The programmable microprocessor sets the electrical conductivity of the metals or metals of interest to the operator, for example, X = 45500000 cm / m-1 gold, the programmable microprocessor receives a signal from the coil, analyzes it and, depending on the settings, gives the result. Thus, in the above case, the metal detector at the heterodyne receiver using the increased discrimination system will only react (emit an audio signal) to gold (the metal of interest to the operator RA, the conductivity of which he set in the settings of the programmable microprocessor).

Next, 6 analyzes the information from 5 and 4 and sets the specifics for some non-ferrous metals. (The TITRION analyzer used, based on the gravimetric titration method, is a multifunctional device and combines eight instruments: a multimeter, a capacitive and resistive bridge, a reflectometer, a spectrum analyzer, a noise and asymmetry level meter, a generator and a level meter, which allows you to analyze the incoming information and set specifics on some solids [5]). Then 6 transmits information to 7, which displays the final data for the operator. 8 and 9 in clear and sunny weather provide the device with the necessary energy, thereby saving charge 10.

Information sources

1. Adamenko M.V. Metal detectors. DMK - Press, 2006, 3-4 s.

2.http: //md911.blogspot.com/2013/03/diskriminatsiya-metalloiskatelya.html

3.Http: //www.metal detectors-aka.rf

4.http: //www.computer-museum.ru/technlgy/proclect/mp/mp.htm

5. http://www.innostar.ru/

Claims (1)

A metal detector at a heterodyne receiver using a system of increased discrimination, consisting of a pulse generator, block 1, switch, block 3, search coil, block 4, analyzer, block 6, indication block, block 7, battery, block 10, characterized in that he additionally introduced a heterodyne receiver with an extended discrimination system, block 2, two solar panels, block 8, block 9, and a programmable microprocessor, block 5, and the pulse generator, block 1, is connected to a heterodyne receiver with an expanded discrimination system initiation, block 2, which is connected to the switch, block 3, which, in turn, is connected to the search coil, block 4, a programmable microprocessor, block 5, and two solar panels, block 8, block 9, which are connected to the battery, block 10, a programmable microprocessor, block 5, is connected to the analyzer, block 6, which is connected to the display unit, block 7.

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