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Contact name:Michelle
Chongqing Gold Mechanical & Electrical Equipment Co.,Ltd |
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High Power Time Domain Transient Electromagnetic Sounding Equipment For Subsurface Survey
Transient electromagnetic method means that a pulse of electromagnetic waves emits and propagates electromagnetic waves to the formation, and the source of the emission is cut off instantaneously. During the interval of the first pulse electromagnetic field, the receiving coil is used to receive the eddy current field formed by the secondary induction. Through signal interpretation and processing, etc., Analyze the signal with the physical properties of the formation, analyze the geological structure and rock formation properties of the unknown area ahead, use this detection technology to solve relevant geological problems, and then achieve the purpose of prediction and forecasting.
The basic working method is: set a transmitting coil on the ground or in the air with a certain waveform current, so as to generate an electromagnetic field in its surrounding space, and generate an induced current in the underground conductive rock ore body; after the power is cut off, the induced current will disappear due to heat loss Decays over time. The geoelectric characteristics at different depths can be obtained by measuring the time-varying law of the secondary field in each time period after power failure.
Techenical Specification
Transmitting voltage | ≤200V3 |
Transmitting current | ≤50A |
Current measurement precision | current range before power supply being cut off is 0~50A, display resolution is 0.01A. |
Power supply frequencies | 0.0625Hz, 0.125Hz, 0.25Hz, 0.5Hz, 1Hz, 2Hz, 4Hz, 8Hz, 16Hz, 32Hz |
Transmitting waveform | +ON, OFF, -ON, OFF, equal width and dual polarity |
Turn-off delay time | 1μs~1000μs |
Turn-off time | ≤1.2μs (pure resistance), changing with the transmitting current and transmitting coil when connecting to the coils |
Damping resistance | 1000Ω |
Transmitting coil | 0.1km×0.1km single turn ~ 2km×2km single turn |
Synchronization mode | external synchronization (cable, GPS) |
Power supply | internal 12V8.6Ah rechargeable battery (or external 12V power supply) lasting for over 10 hours |
Dimension | 525×436×217mm3 |
Weight | 18.5kg |
Working temperature | -10°C~+50°C |
| Receiver |
Number of channel | 1 |
Pre-amplification gain | 8, 32 times |
Main amplification gain | 1, 2, 4, 8, 32, 64, 128 times |
Band-pass | 0~50k Hz (liner phased filter), full band-pass 0~400k Hz |
Suppression | 80dB |
A/D | 16 bit |
Min sample interval | 1μs |
Trace number | ≤128 |
Stacking times | 1~9999 time |
Synchronization mode | internal 12V9.6Ah rechargeable battery (or external 12V power supply) lasting for over 10 hours |
Pocket PC | Windows Mobile 6.0 system with software such as Word, Excel, etc., 320x240 true color, 64MB Flash Rom/ 64MB SDRAM/64MB 2GB CF card, able to store over 200,000 readings of sampled data,2 original rechargeable batteries |
Ports | Bluetooth, infrared and serial port |
Dimension | 340×295×152mm |
Weight | 5.3kg |
Working temperature | -10°C~+50°C |
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