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Metal detectors: PI907, PI807-KIT, PI701-KIT. Characteristics Metal detector PI 807-KIT Do-it-yourself Metal detector PI 701-KIT Do-it-yourself Theory of impulse metal detectors History |
History
of developments |
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by
Iliya Kanchev, doctor of Philosophy, engineer |
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The first metal detector, developed by Ilia Kanchev in 1975, works on the basis of comparing two frequencies. A generator with two transistors serves as a standard generator. The second generator of sine voltage, with one transistor. The searching coil is connected to the collecting circuit of the generator. This is the metal sensitive part of the detector. The two frequencies blend in a detector, which is placed on the entrance of a low-frequency amplifier with two transistors. When blended. a low pulse frequency appears. This frequency can be heard on the entrance of the low-frequency amplifier using headphones. Sensitivity in air, max - 50 cm
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М601-М603 metal detectors. Developed by I. Kanchev in 1995, made in 1995-1996. They work on the basis of compring two radio signals with very close frequency. Both of the signals have a frequency of 100KHz. The two sine-like signals are converted in square impulses.Then the fronts of the two signals are digitally compared. The result is a very high sensitivity for these types of metal detectors. There's an automatic, slowed tracking of the frequency of the main generator by the searching coil's generator. This way the detector works much more steadily, and is compensating the Earth's effect as well. There two modes for slow and fast tracking of the frequency. A coin with a size of 1 inch is detected at a distance of 15 -17 cm ( 6-7 inches). Discriminates metals. Sensitivity in air, max - 120 cm
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VLF 210 metal detector. Constructed by
I. Kanchev in 1997. Sold between 1997
and 1999. Presents greatly
improved parameters. Works on the basis of comparing the phase difference.
The searching coil is composed of two other coils, which are in an
induction balance. There are two independent channels. One of them
works in a mode - "all metals", and the other in a mode
discriminating metals. This way the maximum sensitivity is reached.
The working frequency is 6,5 KHz. Sensitivity in air, max - 250 cm. |
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The two channels of the metal detector has a separate
arrowed indicator. The coil size is 33 cm. It can be disassembled
to 5 parts. There's a metal body, specially designed for this detector,
and a built-in speaker. The headphones are an optional choice. There's
a button that sets all options to default, and two external settings
- earth balance level and sound volume.
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TR 6 metal detector. This is a depth metal detector. Works on the basis "transmitting - receiving". It's developed by I. Kanchev in 1996. On the market between 1996 and 1999. All details are made of metal, as well as the bodies of the transmitting and receiving coils. It's assembled very easily, the user can construct it in 8 seconds and disassemble it in 5 seconds. It has a working frequency of 21 KHz. Sensitivity in air, max - 580 cm. |
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There's a separate channel for detecting hollows. Has an excellent earth balance. If used properly, it can discriminate metals. One set of batteries grants a power supply for about 50 hours. There's a built-in speaker, a slot for headphones, an arrowed indication with three functions - amplitude of the signal, settings, battery test.
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PI 701 metal detector KIT . Impulse metal detector. Designed by I. Kanchev in 2003. Fully-controlled by a micro processor. Has a LCD display, showing the amplitude of the signal. The signal's levels can be followed using headphones, too. The sound from headphones can be modified by frequency and amplitude, depending on its level. There's an external regulator - for the sound volume. Construction KIT. Designed to be assembled at home. Can work with coils with a size between 2,5 cm and 100 cm. The sensitivity in air is dependant on the size of the coil. Sensitivity in air, max- 100 cm.
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PI907 metal detector. An impulse metal detector with excellent characteristics. Developed by I. Kanchev in 2005. Works with 4 coils. 108 changeable parameters using a software, as well as 4 programmable coils. There's a built-in rechargeable battery, two potentiometers for external settings - depth and sound volume. The display shows the set parameters, working mode and the type of the coil set. Indication - built-in speaker or external headphones. There are three main buttons of the micro processor on the front panel. The sensitivity in air is dependant on the size of the coil. Sensitivity in air, max- 12 m.
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PI 807-KIT metal detector. Impulse metal detector with excellent characteristics. Developed in 2006 by I. Kanchev. Works with two coils. Has 54 parameters for adjustments that can be chosen and set with the software, as well as two types of coils. Has two potentiometers for external adjustments - sound volume and depth. The LCD display shows the settings parameters, the work mode and the type of the searching coil. Indication for a detected signal -- supplied by a built-in high-speaker or external headphones. Has three buttons, controlling the microprocessor, on the front panel. The maximum theoretical depth for detection using a square coil 100x100 cm is 12 meters. Consists of:
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Anti-bug detector. An electronic device that detects hidden radio transmitters. Developed by I. Kanchev in 2001. Four version of the device are designed until 2005. The last version 4.1 from 2005 is with increased sensitivity.
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Designed
to be effective for checking home and office for hidden listening
radio transmitting devices. A great device for corporative counter-spy
methods. |
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Antennas.
A practical guide how to build an antenna for a radio station, radio
phone, radio alarm system, TV or else kind of radio receiving devices
by ourselves. Written by I. Kanchev in 1993. Last
edition in 2005. Contains 40 pages, 25 tables with
data and 30 antenna schemes. It's offered in its digital version
only. |
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How
to make a metal detector by ourselves. A practical guide
to constructing metal detectors. The book is written by I. Kanchev
in 1992 - 1993. Published
in 1993. Has two editions and is in Bulgarian language
only, a total circulation of 10 000 books, contains of 64 pages
and has 33 schemes. |
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Archiving
software for personal computers. The book is written by I.
Kanchev and G. Kiprov. Published in 1993. Exists in Bulgarian language
only. Circulation of 7000 copies. Presents the theory of the archiving
software. The book is a practical guide to using archiving software
for PC. |
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An
electronic device for bee poison extraction. Designed by
I. Kanchev in 1991. On the market from 1991 to
now. Presents an independent electronic device powered with two
type AA batteries, granting power supply for over a month. It's
put in front of the hive, irritating bees without harming them
in any way. The poison remains on the glass, and when it dries,
it's scratched off the glass and collected. |
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| Contact Iliya Kanchev::igk@engineer.bg | |||||
| Copyright 2003-2006 | All materials here are copyright protected | e-mail:office@igkelectronics.com |
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