Easily magnetic anomalies earthquake prediction

Low power consumption long time offset magnetic field detector (earthquake prediction) .The design of the hardware circuit of the magnetic field detector seismic geomagnetic acquisition and pre processing module mainly includes. Electronic compass, compass. monitoring device while the magnetic azimuth for monitoring and analyzing the object, GSM, but it can also be applied to other seismic precursor information analysis, such as earthquake precursory infrasound abnormality, only need infrasound abnormality intelligent sensor replace g e o m a g n e t i c a n o m a l y i n t e l l i g e n t s e n s o r , a n d m o d i f y t h e r e l e v a n t p a r a m e t e r s c a n b e .


INTRODUCTION
Earthquake is a common natural disaster, and the prediction of earthquake is a worldwide problem.Earthquake prediction is a worldwide famous puzzle and it is a necessity of scientists to do research on this significant thesis.In order to avoid the heavy losses caused by the earthquake, to find an effective method of imminent earthquake early warning is the hard direction of the earthquake researchers.In recent years, scientists have found that monitoring of the geomagnetic anomaly signal of imminent earthquake is one of effective methods of impending earthquake early warning.China suffers natural disasters, especially earthquake calamity, all the time from ancient times.If accurate prediction is possible, Chinese people may avoid that great loss of lives or fortune and they would not fear destructive earthquakes.We discussed the research background and status of magnetic measurements earthquake, proposed the design of earthquake early warning system on the basis of explore seismomagnetic relations.The working principle of the system is real time monitoring the earth's magnetic field vertical component Z and magnetic north point a.
To give an accurate earthquake prediction is very difficult since that there is too much information relating to earthquake and scientists could hardly distinguish precursor from artificial interference or background noise.As a result,

THEORETICAL BASIS
Overview of the earth's magnetic field: the earth's magnetic field is called the geomagnetic field.Geomagnetic field approximation to the one placed in the centre of the earth's magnetic dipole magnetic field, the magnetic dipole that geocentric magnetic dipole or geocentric dipole, magnetic lines of force distribution as shown in the fig. 1.The earth's magnetic field is a stable magnetic field, the strength of about 0.5~0.6 Gauss, because the magnetic field is a variety of different sources of magnetic field is the result of the superposition, so in terms of its nature, is divided into two parts: one is the main source of stable magnetic field within the solid earth, covers an area of magnetic field of more than 95%; the second is main source to the variation of the magnetic field outside of the solid earth, the biggest change covers the magnetic field strength of 2% ~ 4%.LED is the best choice of 5mm red light emitting diodes.The 8 Ω ,0.25w small caliber horn loudspeakers.The power supply is connected in series with two 5 numbers (to be equipped with a plastic cell rack), and the voltage is 3V.

SOFTWARE
The discrete wavelet transform (DWT) is a mathematical tool that transforms a data vector of length M into a different vector of the same length.It is based on recursive sums and differences of the vector components; the sum can be compared with the low frequency amplitude in the Fourier transform, and the differences with the high frequency amplitudes.
author choose magnetic methods as a breakthrough point after reading lots of inferences.It's possible to record geomagnetic data per second benefiting from the use of new instruments.In this paper, many methods are used to eliminate interference and then first difference method is used to analyze geomagnetic data.The frequency of anomalies gives more information than the amplitude of first difference of geomagnetic data and such operation could avoid unknown artificial inference that may existed and give a comparison with natural background.Low power consumption long time offset magnetic field detector (earthquake prediction) consists of electronic compass, compass.Is based on such a fact: Beichuan middle school in 2008 May 12, afternoon 2:15 class time is before the Wenchuan earthquake 13 minutes.

Fig. 1 Fig. 2 Fig. 3
Fig.1 Schematic diagram of magnetic dipole magnetic field In addition, the New York Times reported in 1858 November 11, before the earthquake in Setubal, Portugal, local only appeared in the compass abnormal phenomenon, even the mariner's compass pointer occur irregular circles of the fact.Before and after the two similar

Fig. 4
Fig.4 Earthquake prediction MCU software The ordinary compass warning circuit and its working principle: watch movement is mainly used for circuit four times per minute is switched on, the red LED light per minute 30 seconds were detected, the MG45 (20k) photosensitive resistance for receiving the magnetic offset, if found abnormal driving a music integrated circuit work, two No.5 dry batteries are available for about one year time.The entire production cost is lower.Components and models see third parts.Welding should be paid special attention to, because the music integrated circuit CMOS circuit, so electric iron shell must to have a good grounding, also can dial to the power plug of the electric soldering iron using waste heat of the electric iron welding so that it can be avoid external field induced breakdown in a music integrated circuit, and cause permanent damage.Welding the electric iron power should not be more than 30W, and stay on the circuit board time should be as short as possible, each solder joint time generally do not exceed the 2sec.Do not use flux soldering paste or paste, if necessary, after use must be welded oil clean.Warning circuit of Electronic Compass: is mainly composed of DN685l Hall element and now use it to abnormalities in the monitoring of the earth's magnetic field, the basic principle is using the switch type Hall sensor (Hall switch) is a new non contact integrated circuit switch, DN6851 has simple structure single, plastic shell,