ground-penetrating radar

ground-penetrating radarGround Penetrating Radar (GPR) is an electronic device that uses high-frequency electromagnetic wave technology to detect underground objects.

ground-penetrating radarThe basic principle of using ultra-high frequency electromagnetic waves to detect the distribution of underground media is that the transmitter emits a pulse electromagnetic wave signal with a center frequency of 12.5M to 1200M and a pulse width of 0.1 ns through the transmitting antenna. When this signal encounters a detection target in the rock layer, it will generate a reflected signal. The direct signal and reflected signal are input to the receiver through the receiving antenna, amplified, and displayed on the oscilloscope. Based on whether there is a reflection signal on the oscilloscope, it can be determined whether there is a target being tested; Based on the delay time of the reflected signal arrival and the average reflected wave velocity of the target object, the distance of the detected target can be roughly calculated.

Due to the use of ultra-high frequency electromagnetic waves in the detection of geological radar, its detection capability is superior to that of detection instruments such as pipeline detectors that use ordinary electromagnetic waves. Therefore, geological radar is widely used in archaeology, foundation depth determination, glaciers, groundwater pollution, mineral exploration, groundwater surface, caves, underground pipeline cable detection, layering, underground buried object detection, highway foundation and pavement, steel structure, cement structure, non-destructive testing, and other inspections.