Metal detection can take up many forms. For example mention the word metal detection to various people and you will get different answers and opinions. Some may think of airport security, some may think a treasure hunt looking for gold. Whichever the reaction we all know metal detectors have become part of our daily lives.
Health concerns raised over Metal detectors.
As metal detectors have become more prevalent in society there have been concerns raised over them putting people in good health at risk. This is because metal detection is known to use radiation in order to detect the outline of an object. This radiation is the issue with many people. Certain types of radiation have in the past known to cause some types of cancers. It is true that metal detectors use radiation but they use such low amounts of radiation that it would be virtually impossible to get any cancer or your health being put at risk due to excessive radiation.
Tips on Conduct in Hobbits Metal detection
There are various codes of conduct one should observe when they’re out metal detecting as a hobby. These codes of conduct ensure that the respective hobbyist doesn’t end up on the wrong side of the law. Some of these codes of conduct include:
- One should ensure that they don’t trespass on other peoples’ property. We all know how much of a serious offence trespassing normally is, in fact it’s so serious of a crime that one may be subjected to prosecution.
- One should also make sure their metal detection hobbies don’t damaged crops and neither do they scare away or harm animals in any way.
- Cleaning up after digging up a site is also highly advised for its common sense to leave a place as you found it. Metal detection hobbyist should also ensure that they avoid vandalizing public property while carrying out their various activities.
- One is also advised to report to the respective authorities if they are to in some chance run into live ammunition or land mines while out and about metal detecting. This can help save lives.
Metal detection all in all is a very good hobby and it definitely pays unexpected dividends for one can never know what they may find out there. It also serves as some form of exercise and helps one keep fit.
Metal detection technologies
Metal detectors basically use one of three technologies, which are:
- Very low frequency (VLF)
- Pulse induction (PI)
- Beat-frequency oscillation (BFO)
Very low frequencyin another name is also known as induction balance. This usually is probably the most popular of the three technologies. It normally entails the use of two unique coils, the transmitter coil and the receiver coil. The transmitter coil is normally supplied with electricity a lot of times and the number of times the currents’ change is then transmitted to the receiver coil that basically works as an antennae that picks up the frequencies and amplifies them.
Pulse induction on the other hand is a less commonly use technology. Unlike the very low frequency or induction balance the pulse induction may use one coil as both a receiver and a transmitter, they may also have two or three coils working in unison. This technology normally sends powerful short bursts of energy through a wire thus generating a magnetic field. When the pulse dies off the magnetic field reverse polarity. Normally when this type of detector lands upon a metal the magnetic field takes longer to disappear.
Beat-frequency oscillation on the other hand works under the impression that there are two coils a small one located in the control box and a big one connected on the search head each coil is connected to an oscillator that creates a lot of pulses every second. The pulses as they travel through each coil they generate radio waves which are picked up by a tiny receiver in the control box, the receiver then creates a beats based on the frequency differences.