DXGE-30S Geomagnetic Shielding System
The DXGE-30S system can offset the magnetic field fluctuations of the geomagnetic field in real time, thereby generating a 10nT zero magnetic environment in a geomagnetic environment. For example, a 1nT or 0.1nT gradient magnetic field can be generated in a shielding room or a shielding cylinder. Generate an arbitrarily set magnetic field for scientific experiments and simulate geomagnetic change environments.
The DXGE-30S geomagnetic field compensation system is widely used by aerospace and military industries and colleges and universities, and its accuracy, stability and digitization degree are widely acclaimed.
System composition
The magnetic flux generating device consists of a set of three-dimensional coils and three corresponding power supplies. A set of three-dimensional coils is used to generate the uniform magnetic field required for the experiment. The three-dimensional coils are equipped with three power supplies to control the three-dimensional coils respectively.
Each dimension has a set of coils to generate a uniform magnetic field. A high-precision imported fluxgate probe is placed in the center as a feedback test for magnetic field adjustment. The feedback signal is calculated by the host computer to adjust the output current value of the high-precision power supply, so as to achieve precise shielding of the geomagnetism and generate the required magnetic field.
The magnetic field measuring device includes the DX-330F fluxgate meter and fluxgate probe, which are mainly used to measure the size of the magnetic field in the uniform magnetic field in the center of the coil and feedback on the real-time magnetic field.
System performance indicators
|
Three-position coil material |
GFRP material or aviation aluminum |
|---|---|
|
Uniformity of magnetic field center |
Better than 1% or 0.5% or 0.1% or 0.05% |
|
Uniform zone |
50-3000mm optional |
|
Central magnetic field strength |
1- 10Gs(0- 1000000nT) |
|
Fluxgate resolution |
0.1nT or 1nT |
|
Bias stability |
5nT (24h, OT <3°C) |
|
Power accuracy |
10μA or 100uA |
|
Power variation accuracy |
1/100000 or 1/50000 |
|
Adjust step |
10nT-20nT (under geomagnetic environment) |
|
Average diameter (mm) |
According to customer requirements |
Three-dimensional Helmholtz coil
| Diameter(m) | 1 | 2 | 3 | 4 | 5 |
|---|---|---|---|---|---|
| Homogeneity range (cm) | 25 | 50 | 75 | 100 | 125 |
| Uniformity | 0.01 | 0.01 | 0.01 | 0.01 | 0.01 |
| Magnetic field (Gs) | 1 | 5 | 10 | 15 | 20 |
Examples（1m ）Three-dimensional Helmholtz coil
| Parameter | X-axis coil assembly | Y-axis coil assembly | Z-axis coil assembly |
|---|---|---|---|
| Magnetic field strength | 110μT ± 10μT | 110μT ± 10μT | 110μT ± 10uT |
| B/Icoefficient | 110μT ± 10ut/A | 110μT ± 10μT/A | 110μT ± 10μT/A |
| Magnetic field resolution | 1.1 ± 0.1nT | 1.1 ± 0.1nT | 1.1 ± 0.1nT |
| Continuous service current | 1A | 1A | 1A |
| Instantaneous maximum current | 2.1A | 2.1A | 2.1A |
| Equivalent side length | 1126mm | 1062mm | 998mm |
| Equivalent spacing | 613mm | 578mm | 543mm |
| Direct-current resistance @20℃ | 18.1Ω ± 1.3Ω | 16.1Ω ± 1.1Ω | 14.2Ω ± 1Ω |
| Electrical inductance | ~64mH | ~53mH | ~43mH |
| Weight | 102kg | 102kg | 102kg |
Simulation data
