YCS2000A Transient electromagnetic instrument (TEM) for coal mines
Main application.
This TEM is an intrinsic safety instrument designed for water-bearing/intruding structure detection in the gas or coal dust explosive dangerous environment of underground coal mine. This instrument adopts advanced IC technology, featuring leading anti-interference capability and measurement accuracy.
Main features.
The receiving device is dedicated magnetic probe, huge equivalent area of probe, little metal body affection, high resolution, large emission current, and the maximum detection distance can reach to 150 meters whit a blind zone smaller than 10 meters, multiple data stacking makes strong anti-interference capability. The software can provide easy operation, graphical user interface and automation processing.
Technical index.
Equivalent area of probe | 450m2or 1800m2 |
Dynamic range | 180dB |
Data Stacking | Up to 10000 times |
Amplification factor | 1、10、100、1000 times |
Sampling rate | 2MSPS、1MSPS、0.5MSPS、0.25MSPS、 0.125MSPS、0.0625MSPS |
Transmitting voltage | 6.5V |
Transmitting current | 4.5A |
Channel Number | 2000 channels |
Transmitting frequency | 2.5Hz、6.25Hz、12.5Hz、25Hz |
Turn-off time | 0.5μs |
Continuous operation time | 8hours |
YD32(A) High resolution electric resistance detector
Main application.
Detection of water-bearing/intruding structures within 100 meters ahead of the head of roadheader
Detection of water-enriched zones within 100 meters ahead of the head of roadheader
Detection of aquiclude thickness and intrusion height in the roadway floor
Detection of water-bearing/intrusions of the roadway wall
Test of grouting effect
Main features.
The YD32(A) is the leading instrument in China for supplying high-power electricity in underground coal mines through excitation of a stable whole-space electric field in mine roadways to identify the apparent resistivity variation.
The device features an intrinsic safety explosion-proof design for coal mines and its small size makes it convenient to carry. This device is a performance leader in terms of long distance detection, on-site graphing and self-testing of ground resistance amongst similar products
The application software has functions of fine data processing, automatic graphing and result data management. Through simple processing, a clear display and an easy to interpret profile of apparent resistivity can be automatically generated.
Technical index.
Transmitting channels | 4(2 independent synchronized transmission circuit per channel) |
Transmitting voltage | 100V |
Max transmitting current | 100mA |
Receiving channels | 32 |
Precision of receiving voltage | 0.02%（100mV） |
Receiving voltage range | ±2V |
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