3d-Radar Geoscope Mk4 User Manual Download Page 16 | Manualshive

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3d-Radar Geoscope Mk4 User Manual Download Page 16

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GeoScope

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User’s Manual

© 2013 3d-Radar AS

Page 12

Revision 2.0

Date: 02/07/2013

If the computer runs Windows XP with Service Pack 2 or newer, the Windows
firewall should be disabled when connecting to the GeoScope; otherwise you
will have problems connecting to the GeoScope. If you use other firewall
software, and experience connection problems, please turn off this as well.

An alternative to disabling the firewall completely is to enable the outgoing
ports 19005 and 19003.

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Summary of Contents for Geoscope Mk4

Page 1: ...3d radar as GeoScope User s Manual Model Geoscope Mk4 Document Version 2 0 ...

Page 2: ...3d radar as ...

Page 3: ...d stored and operated in accordance with 3d Radar s relevant operator s manual and specifications and ii the Products and Software are not modified or misused The preceding warranties shall not apply to and 3d Radar shall not be responsible for defects or performance problems resulting from i the combination or utilization of the Product or Software with products information data systems or device...

Page 4: ...wo conditions 1 this device may not cause interference and 2 this device must accept any interference including interference that may cause undesired operation of the device This Ground Penetrating Radar Device shall be operated only when in contact with or within 1 m of the ground This Ground Penetrating Radar Device shall be operated only by law enforcement agencies scientific research institute...

Page 5: ...tions 6 2 Hardware Components 8 2 1 GeoScope Unit 8 2 2 Aux connector 9 2 3 GPS input 9 2 4 Distance Measurement Instrument DMI 10 2 5 Power Supply 11 2 6 Control Computer 11 3 Antenna Array 13 3 1 Antenna Trailer 13 4 Operation 16 5 Maintenance 18 5 1 Cleaning air filter 18 5 2 Cleaning of connectors 18 5 3 Cleaning the antenna array 18 Abbreviations DMI Distance Measurement Instrument encoder wh...

Page 6: ...ace The depth of the objects is found by measuring the travel time from the signal is transmitted until the echo is received A depth estimate is obtained by multiplying this time with the wave velocity of the signal The GeoScopeTM GPR is the fastest step frequency radar on the market By using a digital frequency source instead of traditional phase locked loop technology the GeoScopeTM can generate...

Page 7: ...face option to allow recording of position data through the serial port RS 232 1 2 Collect up to 41 survey lines simultaneously The GeoScopeTM GPR is designed to operate with an electronically scanned antenna array with up to 41 antennas The antennas are scanned sequentially by the radar The unique antenna system consists of air coupled bow tie monopole pairs as shown in Figure 3 This gives a quas...

Page 8: ...thout changing antennas By comparison a similar survey using impulse GPR would require use of 200MHz 400 MHz 800 MHz and 1600 MHz antennas Figure 4 Wideband coverage of the 3d Radar antenna array The antenna elements are arranged in a linear array as shown in Figure 5 where the transmitting and receiving antennas are displaced to each other During the survey the radar combines the transmit receive...

Page 9: ...re 6 Available antenna models 1 3 Multi offset recording optional The Multi offset recording allows the user to set up antenna scanning sequences with independent transmitter and receiver antenna locations In the standard zero offset antenna scanning sequence the GeoScope transmits receives sequentially on each antenna pair Data is collected in the 1 15 2 3 4 5 6 7 8 9 10 11 12 13 14 Ch 1 2 3 4 5 ...

Page 10: ...ard methods semblance analysis used in seismic processing Other scan sequences can be programmed as well Note that this mode of operation works in a sequential manner hence using all possible combinations of transmitter and receiver antennas will slow down the data collection speed somewhat Figure 7 Common Mid Point Gather 1 4 Accessories options The GeoScopeTM can be used in combination with digi...

Page 11: ...3d radar as GeoScopeTM User s Manual 2013 3d Radar AS Page 7 Revision 2 0 Date 02 07 2013 ...

Page 12: ... GPS RS232 port for recording NMEA0183 messages from GPS Additional RS232 port Trig I O Section 2 3 3 DMI DMI encoder input Section 2 4 4 Antenna Antenna Control cable 5 Ethernet Ethernet connector to Operator Computer 6 Power Switch Push to turn on LED ring is red when system is up and running Push again to turn off LED ring goes dark when system is turned off 7 Power Input Connector for 12 24V D...

Page 13: ... sunlight 2 2 Aux connector The AUX connector Lemo EGB 2B 312 CLL has the following pin configuration 2 3 GPS input The GPS input connector Lemo EGA 2B 312 CLL has the following pin configuration The Geoscope reads serial data on NMEA0183 format from any GPS or GNSS receiver Recommended settings for the GPS NMEA output is Pin Signal 1 Reserved 2 Reserved 3 GND 4 Ethernet 5 Ethernet 6 Ethernet 7 Et...

Page 14: ...he following pin configuration The relationship between DMI Tick count and the quadrature pulses is shown in Figure 10 One tick is counted for each rising or falling edge of pulse trains A and B Figure 10 DMI pulses The supplied DMI encoder has 1000 pulses rev Parameter Recommended settings Position data GPGGA 1Hz output rate Velocity data GPVTG 1Hz output rate Baud rate 115 200 Data bits 8 Parity...

Page 15: ...r to be fully charged when measured without load but when connected to load like the GeoScope voltage can drop quickly Under normal operation a fully charged 50Ah lead acid accumulator with good health will last for approximately 5 hours A gel type deep cycle accumulator is recommended both for safety i e reduced risk for acid leakage and for endurance Gel accumulators are designed for supplying p...

Page 16: ... 2 or newer the Windows firewall should be disabled when connecting to the GeoScope otherwise you will have problems connecting to the GeoScope If you use other firewall software and experience connection problems please turn off this as well An alternative to disabling the firewall completely is to enable the outgoing ports 19005 and 19003 ...

Page 17: ...t arrays range from widths of 90 330 cm with number of channels ranging from 9 to 41Figure 11 shows the DX2429 antenna array which covers a width of 240 cm using 29 channels Figure 11 Antenna Array Model DX2429 3 1 Antenna Trailer The antenna trailer is a lightweight assembly which allows the array to be towed behind a vehicle Figure 12 shows a drawing top view of the trailer assembly ...

Page 18: ...07 2013 Figure 12 Antenna trailer The antenna trailer is assembled by mounting the wheel brackets to the top of the antenna array as shown in Figure 13 Mount the wheel containing the DMI close to Antenna 1 Use the rigging screw to adjust the elevation Figure 13 Wheel bracket with DMI ...

Page 19: ...I connector on the wheel bracket containing the DMI Note that the 2 4 and the 3 3 meter arrays DX2429 and DX3341 are wider than the vehicle Use flashlights and visible markers to the edge of the antenna array when operating at roads with traffic Always wear visible reflex safety west when working at roads and railways Make sure that the elevation of antenna array is sufficient to avoid that the ar...

Page 20: ...e Ethernet interface using a standard CAT5E twisted pair cable Please make sure that a The Local Area Network adapter on the client computer is configured with a fixed IP address in the 192 168 8 x range where x is different from 2 192 168 8 5 for example and with a Subnet Max value of 255 255 255 0 b Power options of the client PC are set to High performance Win7 or Always on XP c There is availa...

Page 21: ... Location for storage of 3dra files c Press OK to close the dialog 7 Push Start button in the main window Notice file name and location in window title bar If you are driving too fast some scans will be lost and vertical red stripes will be shown in the data view When the acquisition is done press Stop The 3dra file is now available in your specified location 8 Make sure the DMI Calibration values...

Page 22: ...essed air from a can or Isopropanol based electronic cleaning spray Never use water to clean connectors During field work avoid putting connectors on the ground or in water in order to minimize the probability of getting sand or dust inside the connectors Inspect connectors for corrosion at regular intervals 5 3 Cleaning the antenna array The antenna array top cover can be cleaned with a wet cloth...

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