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Time-domain airborne electromagnetic method motion noise detection device and suppression method

An aviation electromagnetic and noise detection technology, which is used in measurement devices, electric/magnetic exploration, radio wave measurement systems, etc., to reduce the amount of data, improve the inversion accuracy, and improve the data processing speed.

Inactive Publication Date: 2017-07-14
JILIN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide a motion noise detection device suitable for time-domain airborne electromagnetic method for the problem of introducing motion noise due to the posture swing of the receiving coil;

Method used

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  • Time-domain airborne electromagnetic method motion noise detection device and suppression method
  • Time-domain airborne electromagnetic method motion noise detection device and suppression method
  • Time-domain airborne electromagnetic method motion noise detection device and suppression method

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Embodiment 1

[0054] Suspension rope 3 is made up of upper end part and lower end part, wherein the upper end part is a single rope with a length of 40 meters, which is tied to the bottom of the helicopter 1 cabin, and the lower end part is 16 ropes of different lengths with a length of 9-11 meters. Be tied on the transmitting coil 5 at equal intervals, take the forward direction of the transmitting coil 5 as the criterion, the long rope is tied to the rear end, and the short rope is tied to the front end, so that the transmitting coil 5 is balanced in force during the flight and maintains a horizontal state. The transmitting coil 5 has a diameter of 12 meters and is made of 5 turns of copper core cables with a diameter of 2 centimeters. Its exterior is covered with glass steel pipes of aviation materials and supported by a cross-shaped bracket 4 to prevent the transmitting coil 5 from being affected by the hanging rope. 3 deformation due to traction. The cross-shaped support 4 is made of g...

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Abstract

The invention relates to a time-domain airborne electromagnetic method motion noise detection device and suppression method, including two parts in the air and on the ground. Aerial includes helicopter, aerial data acquisition equipment, transmit coil, preamplifier, z-component receive coil and attitude sensor. The ground includes GPS ground data acquisition equipment, three-component fluxgate and preamplifier. Ground and air time synchronization through GPS. Compared with the prior art, the present invention adopts a single attitude sensor to reduce the number of detection devices on the basis of realizing the attitude detection function, reduces the amount of data, and increases the data processing speed; uses a three-component fluxgate to measure the geomagnetic field as The background magnetic field has the advantages of high precision, strong real-time performance and easy operation; using GPS to realize the time synchronization of the received data, on the basis of ensuring that the data coincides, it is convenient for the staff to process and analyze the on-site data, so as to take corresponding compensation measures to achieve Purpose of suppressing motion noise.

Description

[0001] Technical field: [0002] The invention relates to a time-domain airborne electromagnetic method motion noise detection device and a suppression method, in particular to a pod-type helicopter time-domain airborne electromagnetic method exploration device. [0003] Background technique: [0004] The pod-type helicopter aerial time-domain electromagnetic exploration system uses the helicopter to hang the transmitting coil to emit a high-power magnetic field signal to excite the underground medium, and the underground medium will generate a secondary field due to the eddy current effect. At the same time, the receiving device is used to receive the secondary field signal to realize the interpretation of the resistivity structure of the underground medium. The Z-component receiving coil is the core detection component of the time-domain airborne electromagnetic method exploration system. It is fixed on the cross-shaped bracket. Due to the influence of wind force, the attitud...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V3/10
Inventor 陈晨刘飞王言章林君于生宝
Owner JILIN UNIV
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