Array type frequency domain electromagnetic surveying system data quality monitoring device and method
An electromagnetic detection and system data technology, applied in the direction of measuring devices, radio wave measurement systems, electric/magnetic exploration, etc., can solve the problems of small data volume, low reliability, and high requirements for instrument hardware, and achieve hardware cost reduction, Suppresses the bit error phenomenon and highlights the effect of economic value
Inactive Publication Date: 2013-12-25
JILIN UNIV
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Problems solved by technology
CN10201252A discloses "distributed multi-parameter deep electromagnetic section imaging system and measurement". This method has the advantages of simple connection, easy implementation, and good transmission effect; but the connection line is relatively heavy and inconvenient to use, and is not suitable for use in array systems
CN1137640A discloses a "multifunctional electromagnetic telemetry system". This method has the advantage of being lighter than wired connections, but the amount of data transmitted by this method in a wireless manner is too large and the reliability is low
Compared with the transmission of time series data, this method transmits a relatively small amount of data and a low bit error rate, but it needs to perform FFT calculations in the receiver, and a special mathematical module is required to process the data, which has higher requirements for the instrument hardware.
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[0042] Below in conjunction with accompanying drawing and embodiment the present invention is described in further detail:
[0043] figure 1 Shown is the real-time monitoring device for the data quality of the electromagnetic detection system. The transmitting unit T is connected to the earth load L, and the earth load L is connected to the ground electrodes 1, 2, 3~n through the earth. The receiving unit R is composed of receivers R1, R2, R3~Rn constitutes, the ground electrodes 1, 2, 3~n are respectively connected to R1, R2, R3~Rn in the receiving unit R, and R1, R2, R3~Rn in the receiving unit R are respectively connected to the monitoring unit M, so Said n is a natural number greater than 1, and the monitoring unit M is composed of a wireless module M1 connected to a PC M2. The distance between the transmitting unit T and the receivers R1, R2, R3~Rn is 1~15km, the distance between the receivers R1, R2, R3~Rn in the receiving unit R is 25m~2km, and the monitoring unit M is...
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The invention relates to an array type frequency domain electromagnetic surveying system data quality monitoring device and method. The monitoring device is formed by the fact that an emitting unit is connected with a ground load which is connected with a grounding electrode through the ground, and the grounding electrode is connected with a receiving unit which is connected with a monitoring unit. Compared with the prior art, a heavy transmission electric cable is removed, each frequency point only corresponds to two direct current data I and Q, the number of monitoring data is small, the monitoring data are only one of several hundreds to tens of thousands of time domain data; a wireless module does not need transmission speed that high, wireless transmission is easy to achieved; error code phenomena during a wireless module transmission process are avoided, and high reliability is achieved. Data quality real-time monitoring is achieved by digital orthogonal locking amplifying, operation is simple, FFT operation and multiplication are not involved, a digital orthogonal locking amplifying module can be achieved by middle-low-end control chips such as an MSP430 single chip microcomputer with the price of dozens of yuan and an FPGA, and hardware cost is obviously lowered.
Description
Technical field: [0001] The invention relates to a data quality real-time monitoring device and method in a geophysical detection instrument, in particular to a data quality real-time monitoring device and a monitoring method of an array frequency domain electromagnetic detection system. Background technique: [0002] In the array type frequency domain electromagnetic detection system, "frequency domain" means that the detection method adopts the frequency domain method, and "array type" means that the system is composed of many receivers. [0003] Frequency domain electromagnetic detection methods include controlled source audio frequency magnetotelluric method, complex resistivity method and frequency domain induced electricity method. The controlled source audio frequency magnetotelluric method is a method of detecting the apparent resistivity of the underground medium from shallow to deep by measuring the electric field and magnetic field value of the earth surface at hi...
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IPC IPC(8): G01V3/00
Inventor 林君薛开昶范鹏周逢道刘长胜
Owner JILIN UNIV