CN102722961A

CN102722961A - Geomagnetic anomaly alarm

Info

Publication number: CN102722961A
Application number: CN2012101786370A
Authority: CN
Inventors: 孙骏
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-06-03
Filing date: 2012-06-03
Publication date: 2012-10-10

Abstract

The invention provides a geomagnetic anomaly alarm, which belongs to the field of electronic system application. In the history, the phenomenon of geomagnetic abnormal change occurred in the early stages of a plurality of larger-scale earthquakes and volcanic eruptions. According to the invention, through detecting abnormal change of a geomagnetic field, the abnormal change is converted into an acoustic and light signal in time so as to achieve an alarming effect, and correct pre-warning is hopeful to be made in a few minutes and even dozens of minutes before the coming of a disaster, so as to protect safeties of life and property safeties of the masses. According to the invention, by using magnetism and conductivity of a magnetic needle and using a microcontroller interruption response function, external interruption of a microcontroller is triggered by abnormal direction deflection of the magnetic needle, so that a microprocessor is awakened from a low power consumption sleeping state, and begins to operate a control program so as to activate a light emitting diode and a buzzer to work and generate an alarming sound and a light signal. The geomagnetic anomaly alarm provided by the invention has the advantages of simple and convenient design, power conservation, potential of being designed into diversified small artwork ornaments and conveniences in promotion and application.

Description

The geomagnetic anomaly alarm

Technical field

The present invention can carry out monitoring, alarming to the phenomenon of geomagnetic anomaly, the induction of base area magnetic anomaly, and for meeting with shake doughtily, the individual in geology activity potential threats such as volcanic explosion area provides a kind of economy, easy auxiliary early warning means.

Background technology

A lot of earthquake pre-warnings provide early warning based on the transmission time difference of shear wave and compressional wave, but it is very short to be based on the pre-warning time of this principle, even possiblely predict successfully also there are not enough escape time.In the earthquake historical data, repeatedly put down in writing in the violent earthquake foreshock and near magnet magnet loss phenomenon and the undesired deflection of compass compass are arranged, magnetic fields such as needle irregular movement change phenomenon.Detection based on geomagnetic anomaly can improve pre-warning time greatly, for the lives and properties of saving broad masses of the people provide more opportunity.The present invention is through using the unusual of needle monitoring earth magnetism; And with ERST through the electric signal real-time response, be converted into voice signal at last with light signal is in time reported to the police, whole design economy; Small and exquisite; Power saving even individual family is also easy to use, even has the potentiality that are designed to diversified little artwork ornaments.

Summary of the invention

The present invention is converted into sound and light alarm through electric signal with a kind of simple and practical means with the ERST of earth magnetism in time, and a kind of means of timely early warning are provided for the movable disaster of prevention special geology.

Sensor Design: for the function that realizes that geomagnetic anomaly is reported to the police, the design has selected a small-sized needle as sensor, in design, has used the weak magnetic and the electric conductivity of needle.The weak magnetic of needle has guaranteed to be under its normal condition north and south and has pointed to, but under the situation of geomagnetic anomaly, the physical deflection of needle meeting trigger circuit switch utilizes the electric conductivity active circuit work of needle.Needle links to each other with circuit through the needle support on circuit board altogether.The physical location of needle support can be regulated on circuit board, places to such an extent that the sensitivity of near-induction is high more more from the contact.

Circuit design: in order to improve the reliability of circuit, circuit part has adopted a general purpose microprocessor, and one of them input pin links to each other with sense contact; The state that draws on a little less than normally being set to; Detect the conducting of needle through the mode of the asynchronous triggering of external pin, as long as needle touches the sense contact of microprocessor, microprocessor can respond this external event at once;, separates by needle the circuit part warning that still can work on even irregularly deflecting into other orientation once more with sense contact.Press the reset switch of circuit, system promptly can stop to report to the police and return to the earth magnetism monitoring pattern again, produces warning again up to the incident that needle contact contact takes place once more.

The design of contact: the contact is used to connect needle and microprocessor.Because needle is also deflection counterclockwise of deflection clockwise in unusual, therefore respectively arranged a contact on the needle both sides, circuit board wiring makes its electrical communication, all is connected to the same input pin of microprocessor.The material require of contact satisfies two requirements, and first electric conductivity will be got well, and second can not disturbing magnetic field influences the deflection of needle.Prototype of the present invention has adopted the copper post that is fixed on the circuit board as sense contact at present, and other materials that meet the demands also can.

The design of warning function: after microprocessor responds is pointed to the unusual information in orientation to needle; Through outside triode of output control signal conducting; This triode is sent to a hummer with power supply signal under conducting state; The open and close that circulates at intervals of software control triode through microprocessor, hummer will send a burst of loud alarm song, and light emitting diode of little processing controls simultaneously produces flicker.

Low power dissipation design: the design of software section of the present invention is arranged at little processing under the low power mode of operation of a power saving at ordinary times; Have only needle deflection to run into the contact; Microprocessor just can be waken up, and sound control circuit and LED driving circuit execution warning are opened in software startup work immediately after waking up.The design adopts the 3V circuit, available powered battery, and the design of low-power consumption guarantees that entire circuit can be in work under the monitoring pattern for a long time and need not the frequent change battery; Another effect of low-power consumption is to guarantee that entire circuit has no enough strong electric current variation activity to influence the unusual deflection of needle through electromagnetic induction under the normal monitoring pattern.

The software design explanation: little processing itself carries nonvolatile memory, and monitoring of software passes through the burning of programmable device interface in nonvolatile memory.After normally powering on; Program control system is in light emitting diode and extinguishes; The state that the hummer power supply breaks off; Microprocessor itself also is in low power consumpting state, wakes enabled up but the pin that joins with the contact is set to low level or level negative edge triggering external interrupt enabled and low-power consumption mode.In case the contact is run in needle deflection, microprocessor can respond interruption, and software drives hummer and light emitting diode by interrupting the entry program guiding.

Application notice: owing to will guarantee the reliable and stable of needle work, system can not be near magnet, and irony object and heavy current change object.System need keep stable places, guarantee needle regular orientation north and south and and contact separation, avoid receiving such as external force such as wind-force and influence.

Claims

1. can monitor geomagnetic anomaly and in time produce the system that reports to the police for one kind, comprise needle, sense contact, circuit board; Power supply, voltage conversion circuit, power switch, microprocessor; Reset switch, triode, hummer; Microprocessor program download interface circuit, light emitting diode, and the Control Software that is stored in the microprocessor is formed.

2. compass and microcontroller circuit are combined, realized the effect of automatic monitoring geomagnetic anomaly.

3. utilize the mode of sound and light alarm, make the geomagnetic anomaly that is difficult to discovered change the incident that becomes ordinary people's perception in time.

4. utilize the asynchronous triggering function of low-power consumption of microprocessor, improved the sensitive monitoring property that needle changes, the timely stability and the electricity-saving characteristic of event response.

5. 3 volts of WVs under the monitoring pattern, electric current is lower than 3 microamperes, can lean on the work of powered battery long term maintenance, also can outer stabilized voltage supply or computer universal serial bus power supply supply power through the voltage conversion circuit of system, be convenient to daily use.