Wednesday, April 16, 2014

Python-3 Ground Penetrating Radar

Wireless Monostatic Ground Penetrating Radar with one receiving-transmitting antenna Python-3.

4 frequency modules (25, 38, 50, 100 MHz) of the Python-3  - Wireless Monostatic Ground Penetrating Radar with one receiving-transmitting antenna4 frequency modules (25, 38, 50, 100 MHz) of the Python-3  - Wireless Monostatic Ground Penetrating Radar with one receiving-transmitting antenna

Features

  • FREQUENCES: 100 / 50 / 38 / 25 MHz
  • ANTENNA LENGTH: from 1 m to 4 m, depends on selected frequency
  • WEIGHT: from 10 kg to 20 kg, depends on selected frequency
  • TIME RANGE: from 1 to 1500 ns, step 1 ns
  • SCAN RATE: 28 scans per second
  • SAMPLES PER SCAN: 1024 samples per scan
  • RESOLUTION: 16 bit
  • FILTERS: Preset and Customized digital filters.
  • GAIN: 9 points digital gain function
  • DATA TRANSFER: through built-in Wi-Fi to PC.
  • POWER: Built-in battery 12 V, 9 A*h with battery life more than 7 h
Python-3 georadar is a portable digital subsurface sounding radar carried by a single operator, especially used for deep surveys (up to 50 meters* in favorable ground). The unit is designed for solving a long-range of geotechnical, geological, engineering and other tasks wherever nondestructive operational environmental monitoring is needed. In the sounding process, the operator is getting real-time information as a radiolocation profile (sometimes also referred to as radargram) on a display. At the same time, data are recorded on a hard disc for further use (processing, printout, interpretation, etc.). Examples of radiolocation profiles you can see below.
Georadar consists of central segment (100 MHz operating frequency) and 4 additional antenna plates to change operating frequencies to 50/38/25 MHz. Central segment includes control unit electronics, built-in 12 V 9 A*h battery, built-in Wi-Fi access point. Accessories set includes software, charger and tow-handle.

Georadar is made as dust/waterproof (IP67) and may be even immersed in water for a short time. Antennas have vinilplastic substrates with extremely high abrasion resistance. All georadar parameters are computer controlled,
Use of a specific antenna is determined by a sounding task. Higher sounding frequency means better resolution, but with more significant electromagnetic wave attenuation in the environment, resulting in lower sounding depth; and vice versa - lower frequency may lead to a larger penetration depth at the sacrifice of poorer resolution. Sounding depth is assumed that sounding is made in a soil whose relative dielectric permittivity is equal to 4 and specific attenuation is 1 to 2 dB/m. Depth of investigation is understood to be detection depth of a flat boundary with reflectance equal to 1. Note that these data are rather approximate and are strongly dependent on parameters of the environment sounded.

Comparing of 4 different frequencies (25, 38, 50, 100 MHz)
on the same place (Sandy dune near the Riga Bay, Lilaste, Latvia)

GPR image of Sandy dune near the Riga Bay, Lilaste, Latvia at 25 MHz

____________GPR image of Sandy dune near the Riga Bay, Lilaste, Latvia at 38 MHz

GPR image of Sandy dune near the Riga Bay, Lilaste, Latvia at 50 MHz

GPR image of Sandy dune near the Riga Bay, Lilaste, Latvia at 100 MHz

Source

No comments:

Post a Comment