Electromagnetic detecting system capable of eliminating background noise and method for eliminating background noise
A background noise and electromagnetic detection technology, applied in the transmission system, transmission noise suppression, electrical components, etc., to achieve accurate measurement results, convenient operation, and save detection costs
Inactive Publication Date: 2013-06-26
ZHENGZHOU UNIV
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[0003] At present, when many places in China are doing the environmental impact assessment of electromagnetic radiation of high-voltage transmission lines, it is found that due to the influence of surrounding background electromagnetic noise, the measurement results exceed the national standard , in this case, it is impossible to determine the impact of the measured high-voltage transmission line on the electromagnetic radiation environment by using the existing measurement equipment and technology, which brings great difficulties to the evaluation and management of the impact of the electromagnetic radiation environment
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[0029] The present invention will be further described in detail below in conjunction with the accompanying drawings.
[0030] Such as figure 1 , figure 2 As shown, an electromagnetic detection system capable of eliminating background noise includes a main receiver, an auxiliary receiver, and a computer. The main receiver and the auxiliary receiver have the same structure, and both include a signal receiving antenna, an amplification and filtering module, a GPS module, and a synchronization module. , digital signal processing module and wireless communication module. The signal receiving antenna is connected to the amplification and filtering module, the amplification and filtering module is connected to the digital signal processing module, the signal processing module is connected to the wireless communication module, the GPS antenna is set on the GPS module, the GPS module is connected to the synchronization module and the digital signal processing module, and the synchr...
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The invention belongs to the technical field of electromagnetic environment detection, and particularly relates to an electromagnetic detecting system capable of eliminating background noise and a method for eliminating the background noise. The method includes that a main receiver and an auxiliary receiver which are identical and work synchronously are utilized when in electromagnetic detection, and the distance from the main receiver to a radiation source is ten times that from the auxiliary receiver to the radiation source; the main receiver receives electromagnetic signals and background noise signals which are emitted by the radiation source; the auxiliary receiver receives background noise signals and synchronously transmits the noise signals to the main receiver; and the noise signals received by the main receiver and the noise signals transmitted by the auxiliary receiver are offset with one another in the main receiver, so that signals received by the main receiver are pure electromagnetic signals, and the electromagnetic signals are transmitted to a computer to be processed by the computer. Accordingly, the electromagnetic detecting system and the method have the advantages that measurement results detected in an electromagnetic environment are accurate, and evaluation for the electromagnetic radiation environment is accurate and reliable assuredly.
Description
Technical field: [0001] The invention belongs to the technical field of electromagnetic environment detection, and in particular relates to an electromagnetic detection system capable of eliminating background noise and a method for eliminating background noise. Background technique: [0002] To measure electromagnetic radiation, a measuring receiver or a calibrated spectrum analyzer is generally used. These are all frequency-selective devices. For example, when measuring the electromagnetic environment near a large electromagnetic radiation source, when measuring at a certain frequency, the same-frequency signal in the background noise has a great influence on the accuracy of the measurement results. This background noise interference has the same frequency as the electromagnetic radiation of the device under test, and the measurement receiver or spectrum analyzer cannot identify and distinguish which is the noise and which is the electromagnetic radiation of the device u...
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IPC IPC(8): H04B1/10H04B15/00H04B17/00
Inventor 邹澎张延彬杨明珊马力
Owner ZHENGZHOU UNIV