Synchronous acquisition system and method for multi-channel electromagnetic field intensity

Abstract

The invention discloses a synchronous acquisition system for multi-channel electromagnetic field intensity. The synchronous acquisition system comprises a control computer, a measurement and control host machine, a signal processing front end and an electric field sensor. The control computer is connected with the measurement and control host machine through a cable, the measurement and control host machine and a signal acquisition front end are connected through optical fibers, and the electric field sensor is directly connected with the signal acquisition front end. The synchronous acquisition system is based on virtual instrument technology, and can finish electromagnetic field intensity measurement of a plurality of areas and a plurality of measurement points, display in real time and store data. Different test requirements can be met by changing field intensity probes of different frequency range and different measuring range. In addition, the synchronous acquisition system is fast in test speed and simple to operate, test efficiency can be improved greatly, and safety of test personnel is guaranteed.

Description

technical field [0001] The invention relates to the field of electromagnetic compatibility testing, in particular to a multi-channel electromagnetic field strength synchronous acquisition system for electromagnetic field strength testing. Background technique [0002] When the short-wave and microwave high-power transmitting equipment carried by surface ships is working, the electromagnetic environment generated by it can lead to the performance degradation or failure of the weapon system, and affect the safety and survivability of the ship's personnel. Although theoretical calculations and computer simulations can obtain the electromagnetic environment in the near field of the antenna, due to the differences in launching equipment, the influence of ship hull structure and shipboard weapon equipment, the actual electromagnetic environment is different from the theoretical electromagnetic environment. In order to ensure the normal operation of shipboard electronic equipment a...

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Problems solved by technology

[0003] At present, the electromagnetic environment test in the domestic real ship environment often requires multiple testers to hold field strength meters and manually record the test data, and test point by point and frequency by frequency in the test area designated by the ship. The test time is long and the efficiency is low. Personnel are vulnerable to electromagnetic radiation, which also has a certain impact on the life of high-power transmitting equipment

[0004] Compared with the "multi-point synchronous pre-test device for surface ship electromagnetic environment (application number 200710081931.9)", the multi-point synchronous pre-test device for surface ship electromagnetic environment is mainly used for pre-test (model test), and its data acquisition The card and the electric field sensor are connected by cables. The arrangement of a large number of long cables greatly disturbs the test field, and the signal crosstalk between cables brings a large test error to the test data of small field strength. The poor rejection of frequent common mode signals makes the measurement dynamic range smaller and the test repeatability poorer

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