CN101630011A - Earthquake monitoring and alarming device based on virtual instrument - Google Patents

Abstract

The invention discloses an earthquake monitoring and alarm device, which is mainly characterized in that it has a computer and a magnetic field sensor, reads the data sent by the magnetic field sensor through the virtual instrument software on the computer, intercepts valid bytes therein, and performs data processing Obtain the azimuth value of the geomagnetic field, compare this azimuth value with the normal geomagnetic field azimuth value of the place to obtain the state of the geomagnetic field and display it on the computer user interface, draw the two-dimensional graph of the geomagnetic field azimuth value and corresponding time in real time, and compare the geomagnetic field state, azimuth The value and corresponding time are saved as data files, and the monitoring data are processed subsequently to calculate the mean value, variance and other related parameters. in the data file. The invention has the advantages of very low cost, infinitely long monitoring time, simple monitoring data format, convenient subsequent data processing and expansion, and simple and convenient data exchange for researchers.

Description

Earthquake Monitoring and Alarm Based on Virtual Instrument

Technical field

The invention belongs to the technical field of earthquake early warning, uses technologies such as virtual instruments, magnetic field measurement, and earthquake monitoring to monitor magnetic field data to provide evidence for earthquake prediction, and specifically relates to an earthquake monitoring and alarm device based on virtual instruments.

Background technique

Earthquakes can cause huge disasters in an instant, and bring immeasurable losses to people's lives and properties. Earthquake monitoring is an important research topic at home and abroad, but the current magnetic field monitoring equipment is mostly electronic circuit boards, with small storage capacity and data The communication is inconvenient, and the follow-up processing of the data cannot be carried out.

Contents of the invention

For this reason, the purpose of the present invention is to provide a kind of earthquake monitoring and alarm device based on virtual instrument, can monitor the abnormal disturbance of geomagnetic field and alarm geomagnetic field for a long time, save geomagnetic data, and do follow-up processing to data. The monitoring data is stored on the PC hard disk, which can monitor the geomagnetic field data for an unlimited time. The data format is simple, which is convenient for researchers to exchange monitoring data, and the follow-up analysis and processing of data is also very convenient.

In order to achieve the above object, the technical solution adopted by the present invention is to have a computer and a magnetic field sensor, the computer is connected to the magnetic field sensor, and a string of hexadecimal data sent by the magnetic field sensor through the serial port is read by the virtual instrument software on the computer. The above-mentioned virtual instrument software intercepts the two effective bytes, and performs data processing such as base conversion and azimuth value calculation to obtain the azimuth value of the geomagnetic field, and compares the azimuth value with the normal geomagnetic azimuth value of the place and converts it into the status of the geomagnetic field and displays it in the On the computer user interface, the virtual instrument software calls a function to read the time corresponding to each geomagnetic field azimuth value, draws a two-dimensional graph of the geomagnetic field azimuth value and the corresponding time in real time, and displays the state of the geomagnetic field, the azimuth value and the corresponding time. The time is saved as a data file, as monitoring data, to provide information for future research, to perform follow-up processing on the monitoring data, to calculate the mean, variance, probability density and other related statistical parameters, and to provide data reference for earthquake researchers; the local magnetic field is abnormally disturbed , the computer will send out an abnormal alarm, and record the geomagnetic field azimuth and time at the moment in the abnormal data file.

The present invention utilizes the principle that the geomagnetic field will be disturbed before an earthquake, and it can monitor the state of the geomagnetic field and alarm the abnormal disturbance of the geomagnetic field for a long time; the present invention uses virtual instrument technology, which greatly saves hardware costs, data display, storage, and subsequent processing All are carried out in the virtual instrument software on the computer; the geomagnetic field status and abnormal data are saved in a specific data format, stored on the PC hard disk, the format is simple, and it can be monitored for an infinite time, real-time display and draw the geomagnetic field data and time curve; When the local magnetic field is abnormally disturbed, it can issue various alarms and make records; the monitoring data format is simple and convenient to read and copy; the monitoring data can be processed, counted and analyzed to provide judgment basis for earthquake researchers; Monitoring data for subsequent processing and exchange among earthquake researchers.

Description of drawings

The present invention will be further described below in conjunction with accompanying drawing.

Fig. 1 is a schematic structural view of the present invention.

Fig. 2 is a software functional block diagram of the present invention.

Detailed ways

Referring to the accompanying drawings, the present invention has a computer and a magnetic field sensor, the magnetic field sensor is powered by the USB port of the computer, and simultaneously sends character strings to the computer serial port through the RS232 serial port. A string of hexadecimal data sent by the magnetic field sensor through the serial port is read by the virtual instrument software on the computer, and the virtual instrument software intercepts two valid bytes among them, and performs data processing such as base conversion and azimuth value calculation to obtain the ground Magnetic field azimuth value, compare this azimuth value with the normal geomagnetic field azimuth value of this place and convert it into a geomagnetic field state (normal state, abnormal state) and display it on the computer user interface, and the virtual instrument software calls a function to read out each geomagnetic field azimuth The time corresponding to the value, draw the two-dimensional graph of the azimuth value of the geomagnetic field and the corresponding time in real time, save the state of the geomagnetic field, the azimuth value and the corresponding time as a data file, and use it as monitoring data to provide information for future research. After subsequent processing of the data, relevant statistical parameters such as the mean value, variance, and probability density are calculated to provide data reference for earthquake researchers; when the local magnetic field is abnormally disturbed, the computer will send out an abnormal alarm, and the azimuth value of the geomagnetic field at the moment and times are recorded in the exception data file.

In the present invention, the virtual instrument software includes a collection module, a display module, a storage module, a warning module and a data processing module. The functions of each part are:

Acquisition module: Set the relevant parameters of serial communication, including baud rate, data bits, parity, etc. Read the hexadecimal string sent by the sensor and display it, intercept the effective bytes (the azimuth value of the geomagnetic field in the X direction and the azimuth value of the geomagnetic field in the Y direction), and perform numerical conversion and formula calculation on the two bytes of data and so on to obtain the azimuth value of the earth's magnetic field.

Display module: compare the azimuth value of the geomagnetic field calculated by the virtual instrument software with the azimuth value of the geomagnetic field when there is no earthquake in this place, if the difference is within the set range, it is considered normal, and if it exceeds the set range, it is considered to be normal. abnormal. In real time, the current geomagnetic field state (normal state/abnormal state) is displayed on the computer user interface; when the virtual instrument software calculates the geomagnetic field azimuth value, it calls a function to read the time value on the computer at this moment ( Year, month, day, hour, minute, and second), draw a two-dimensional graph of the geomagnetic field data and the corresponding time.

Preservation module: the virtual instrument software adds a record to the total monitoring data file every half second, and the content includes hour, minute, second, geomagnetic field position value at this moment, normal (or abnormal). When the abnormal disturbance of the local magnetic field exceeds the set value, the virtual instrument software will add a record to the abnormal monitoring data file. difference. In addition, the user can set the path for saving the monitoring data files, and the time interval for saving the monitoring data files (how many hours to save once).

Warning module: when the abnormal change of the local magnetic field exceeds the set value, the alarm light in the computer user interface will change from green to red to issue an abnormal warning, and the computer will issue an alarm sound at the same time;

Data processing module: read the azimuth value of the geomagnetic field in the total monitoring data file, calculate the average value, variance, and probability density of the azimuth value of the geomagnetic field per minute, and save these data in the statistical data file. The format is start time, Cutoff time, mean, variance, probability density.

The above-mentioned embodiments are only descriptions of the preferred implementation modes of the present invention, and are not intended to limit the concept and scope of the present invention. All kinds of deformation and improvement should belong to the protection scope of the present invention.

Claims (1)

1, a kind of earthquake monitoring and alarm based on virtual instrument, it is characterized in that described earthquake monitoring and alarm have computer and magnetic field sensor, described computer and magnetic field sensor are connected, read magnetic field sensor by the virtual instrument software on the computer A string of hexadecimal data sent through the serial port, the virtual instrument software intercepts two valid bytes, performs data processing such as base conversion and azimuth value calculation to obtain the geomagnetic field azimuth value, and compares the azimuth value with the geomagnetic field The normal geomagnetic field azimuth value is converted into the geomagnetic field state and displayed on the computer user interface, and the virtual instrument software calls the function to read the time corresponding to each geomagnetic field azimuth value, and draws the binary value of the geomagnetic field azimuth value and the corresponding time in real time. Three-dimensional graphics, save the geomagnetic field state, orientation value and corresponding time as data files, as monitoring data, provide information for future research, perform follow-up processing on monitoring data, and calculate related statistical parameters such as mean value, variance, probability density, etc. Provide data reference for earthquake researchers; when the local magnetic field is abnormally disturbed, the computer will send out an abnormal alarm, and record the current geomagnetic azimuth and time in the abnormal data file.

Images