OKM Gepard GPR 3D Bedienungsanleitung

Gepard GPR 3D

Ground Penetrating Radar

User's Manual

Any information contained in these operating instructions may be changed without prior notice.

OKM does not make any warranty for this document. This also applies without limitation to implied assurances of merchantability and

fitness for a specific purpose. OKM does not assume any responsibility for errors in this manual or for any incidental or consequential

damage or loss associated with the delivery, e ploitation or usage of this material.

This documentation is available "as presented" and without any kind of warranty. In no circumstances OKM takes responsibility for lost

profits, usage or data loss, interruption of business activities or all kind of other indirectly damages, which developed because of errors

in this documentation. This instruction manual and all other stored media, which are delivered with this package should only be used for

this product. Program copies are allowed only for security- and safety purposes. The resale of these programs, in original or changed

form, is absolutely forbidden.

This manual may not be copied, duplicated or translated into another language, neither in part nor completely, over the copyright

matters without the prior written consent of OKM.

3
Table of Contents
Introduction ....................................................................................................................................................... 7
1 Preface ....................................................................................................................................................... 8
2 Important notes ......................................................................................................................................... 8
2.1 General notes .................................................................................................................................... 9
2.2 Possible health hazards .................................................................................................................... 9
2.3 Surrounding area .............................................................................................................................. 9
2.4 Voltage ............................................................................................................................................... 9
2.5 Data safety ......................................................................................................................................... 9
3 Maintenance and services ....................................................................................................................... 10
4 Danger of e plosion during e cavation ................................................................................................... 10
Technical Specifications .................................................................................................................................. 11
1 Control unit .............................................................................................................................................. 12
2 Telescopic shaft ....................................................................................................................................... 12
3 Triangular antenna (unshielded) ............................................................................................................. 12
Scope of Delivery ............................................................................................................................................. 13
Control Elements ............................................................................................................................................. 15
1 Control Unit ............................................................................................................................................. 16
1.1 General overview ............................................................................................................................. 16
1.2 Connector panel .............................................................................................................................. 17
2 Triangular Antennas with shafts ............................................................................................................. 18
3 Charging adapter ..................................................................................................................................... 18
Assembly .......................................................................................................................................................... 20
Field procedure ................................................................................................................................................ 25
1 Conducting a field measurement ............................................................................................................ 26
2 General scanning procedure ................................................................................................................... 28
2.1 Scan mode ....................................................................................................................................... 28
2.2 Regulation of the number of impulses per scanning path ............................................................. 29
3 Special advice for field procedure ........................................................................................................... 30
3.1 Orientation of the antennas ............................................................................................................ 31
3.2 Parallel or Zig-Zag? ........................................................................................................................ 31
Software ........................................................................................................................................................... 33
1 Setting up the Android application .......................................................................................................... 34
1.1 Download and install the application .............................................................................................. 34
1.2 Activate the application ................................................................................................................... 35
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4
1.3 Establish a WiFi connection ............................................................................................................ 35
2 Activation ................................................................................................................................................. 37
2.1 Activation with QR code ................................................................................................................... 37
2.2 Manual activation ............................................................................................................................ 37
3 New Scan ................................................................................................................................................. 39
3.1 Setting up a GPR measurement ..................................................................................................... 39
3.1.1 Establish WiFi connection ....................................................................................................... 39
3.1.2 General settings ...................................................................................................................... 39
3.1.3 Project title and description .................................................................................................... 40
3.1.4 Choosing a scan type .............................................................................................................. 40
3.1.5 Choosing the scan mode ......................................................................................................... 41
3.1.6 Ma imum depth and soil type ................................................................................................. 42
3.2 Conducting a GPR measurement .................................................................................................... 43
3.2.1 Measuring in 2D ...................................................................................................................... 43
3.2.2 Measuring in 3D ...................................................................................................................... 44
4 View scan ................................................................................................................................................. 46
4.1 2D view screen ................................................................................................................................ 49
4.2 3D view screen ................................................................................................................................ 49
4.3 Toolbar menu .................................................................................................................................. 50
4.4 Applying filters ................................................................................................................................ 51
4.4.1 Bias .......................................................................................................................................... 52
4.4.2 E traction ................................................................................................................................ 52
4.4.3 Interpolation ............................................................................................................................ 53
4.4.4 Envelope .................................................................................................................................. 53
4.5 Changing project title and notes ..................................................................................................... 53
4.6 Setting field dimensions .................................................................................................................. 54
4.7 Showing map files ........................................................................................................................... 55
Appendi  & References ................................................................................................................................... 57
1 Depth Table Calculations ......................................................................................................................... 58
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Illustration Inde

Figure 3.1: Scope of delivery .............................................................................................................................. 14

Figure 4.1: Control unit of Gepard GPR .............................................................................................................. 16

Figure 4.2: Connector panel of the control unit ................................................................................................. 17

Figure 4.3: Triangular antennas with transmitter, receiver and telescopic shafts ........................................... 18

Figure 4.4: Charging the internal batteries ....................................................................................................... 18

Figure 6.1: Holding the Gepard GPR before starting the scan .......................................................................... 27

Figure 6.2: Starting position of a scan area ....................................................................................................... 28

Figure 6.3: Scan modes to measure an area ..................................................................................................... 29

Figure 6.4: Effects of changing the number of impulses and their distance .................................................... 30

Figure 6.5: Different walking speeds during scanning ...................................................................................... 30

Figure 7.1: Main menu ........................................................................................................................................ 34

Figure 7.2: Enabling WiFi ................................................................................................................................... 35

Figure 7.3: Entering Wi-Fi password .................................................................................................................. 36

Figure 7.4: Scan QR code to activate the application ......................................................................................... 37

Figure 7.5: Activation – Entering the serial number .......................................................................................... 38

Figure 7.6: Activation – Entering the activation code ......................................................................................... 38

Figure 7.7: New Scan – Establish WiFi connection ............................................................................................ 39

Figure 7.8: New Scan – General settings ........................................................................................................... 39

Figure 7.9: New Scan – Project title and description ......................................................................................... 40

Figure 7.10: New Scan – Choosing a scan type ................................................................................................. 41

Figure 7.11: New Scan – Selecting the scan mode ............................................................................................ 41

Figure 7.12: New Scan – Ma imum depth and soil type .................................................................................... 42

Figure 7.13: Ready for 2D measurement ........................................................................................................... 43

Figure 7.14: Incoming scan data during 2D measurement ............................................................................... 43

Figure 7.15: Ready for 3D measurement ........................................................................................................... 44

Figure 7.16: Incoming scan data during 3D measurement ............................................................................... 44

Figure 7.17: Applying field dimensions .............................................................................................................. 45

Figure 7.18: View Scan – List of measurements ................................................................................................ 46

Figure 7.19: 2D and 3D representation of a measurement ............................................................................... 47

Figure 7.20: Statusbar of the view screens ........................................................................................................ 48

Figure 7.21: 2D view screen ............................................................................................................................... 49

Figure 7.22: 3D view screen ............................................................................................................................... 49

Figure 7.23: Save and load snapshots ................................................................................................................ 50

Figure 7.24: Filter dialog .................................................................................................................................... 52

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Figure 7.25: Notes dialog ................................................................................................................................... 54

Figure 7.26: Field dimensions dialog ................................................................................................................. 54

Figure 7.27: Create a map file - Alternative 1 .................................................................................................... 55

Figure 7.28: Create a map file - Alternative 1 .................................................................................................... 55

Figure 7.29: Map view ......................................................................................................................................... 55

Figure 8.1: Dielectric reference for various soil attenuation ............................................................................. 58

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1 Introduction

CHAPTER 1

Introduction

8 Introduction

1.1 Preface

Dear Customer,

all of the engineers, sales, training and support staff at OKM GmbH would like to thank you for your purchase

of the Gepard GPR.

The Gepard GPR detector works on the principle of Ground Penetrating Radar (GPR). The radar (RAdio

Detection And Ranging) sends a signal into the ground and awaits the reflection of the electrical signal or in

common terms an “echo” of the signal to detect sub-surface anomalies. Besides the detection of metallic

objects, this device is also capable of detecting natural features of the earth like formations of strata,

cavities, voids, faults, and other non-metallic objects. This equipment is best suited at detecting sub-surface

anomalies like, sepulchers, buried treasure, buried utilities, tanks and the like.

The Gepard GPR is able to locate, document and analyze buried objects within various soil conditions,

structures and vessels non-intrusively without having to e cavate the area. Using the GPR is particularly

useful in areas where detection is a must and e cavation is not possible. The easy and fle ible handling of the

Gepard GPR can easily and quickly give reproducible results.

With our team of specialists we guarantee that our products are under recurrent control. Our specialists are

constantly striving to improve the equipment, performance and understanding of the equipment.

By purchasing or using one of our products, we cannot guarantee that during your research you will be

successful and have a find. The recognition of hidden and buried objects depends on a huge number of

factors. As you well may know there are different soil types all over the world with different levels of natural

attenuation. Variable soil properties can and will hamper and alter ultimate scan measurements. Areas

where there is an e treme amount of ground water, varying clays, sands and wet soils making scanning more

difficult and may reduce the ma imum depth capabilities of any and all detection equipment, regardless of

make or model.

For more information regarding where this equipment has been used, operated and tested, please visit our

website or contact a sales representative. Our equipment is under constant testing and improvement. With

this being mentioned, it is possible for material in this handbook to change without prior notice.

It is necessary for our company to protect our developments and all the information learned during the

“Research and Development” phases in creating our technology. We strive to stay within the given framework

of legislation, patents and trademark registration.

Please take the time to read this user manual and familiarize yourself with the operation, functionality and

how to utilize the Gepard GPR. We also offer training for your equipment in our factory. We strive to maintain

a worldwide dealer network for assistance and support. Please visit our web site for more information!

1.2 Important notes

Prior to using the Gepard GPR and its accessories, please read these operating instructions carefully. These

instructions give information on how to use the detector and potential sources where precautions should be

taken.

The Gepard GPR and its accessories serve for the analysis, documentation and detection of sub-surface

anomalies and ground disturbances. The recorded data of the ground structure will be transmitted to an

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Introduction 9

electronic device like an Android Tablet PC to give a visual representation of the anomaly. Using our

proprietary software program will assist in visualizing the object.

The Gepard GPR utilizes an unshielded transmitting system to be as portable as possible. It is not

approved for the usage in the EU. Please check the local regulations of your country!

1.2.1 General notes

Being an electronic device, the Gepard GPR has to be treated with caution and treated with care as with all

other electronic devices. Any failure to observe safety precautions or use of the equipment for purposes

other than its intended design may result in damage or destruction of the processing unit and/or its

accessories or connected components.

The device has a built in anti-tampering module which will destroy the unit if it is improperly opened. There

are no end user serviceable parts on the inside of the unit.

1.2.2 Possible health hazards

If used properly this device normally does not pose any health hazards. According to current scientific

knowledge, the high-frequency signals are not harmful to the human body on account of their very low

power.

1.2.3 Surrounding area

When moving this unit from a cold place to a warmer place, watch out for condensation. Do not immediately

operate the unit until any possible condensation could have evaporated. The unit is not weather proof and

water or condensation can destroy the unit.

Avoid strong magnetic fields, which may occur in places where there are large electric motors or unshielded

loudspeakers. Try to avoid using this equipment within 50 meters (150 ft) of this type of equipment.

Metallic objects on the ground such as cans, tin, nails, screws or debris can influence your scan data and

present negative results regarding your scan data. Also it is a good habit to remove any metallic objects off of

your person like cellular telephones, keys, jewelry, etc... Do not wear steel toe boots.

1.2.4 Voltage

Please be aware that the unit is powered by an internal accumulator. Please use only approved chargers for

this unit.

Never connect or use a 110/230 Volt main AC power supply directly!

1.2.5 Data safety

Data errors can occur if:

•the range of the sender module has been e ceeded,

•the power supply of the device or the batteries are too low,

•the unit is operating to close to devices which sends out or causes disturbances

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10 Introduction

•atmospheric conditions (electrical storms, lightning, etc...)

1.3 Maintenance and services

In this section you will learn how to maintain your measuring instrument with all included accessories to

keep it in good condition for a long time and to get receive measuring results.

The following list indicates what you absolutely should avoid:

•penetrating water

•strong dirt, sand and dust deposits

•hard impacts or drops

•strong magnetic fields

•operating within metal enclosures

•continued e posure to high heat

To clean your device please use a dry soft rag or cloth. To avoid any damage you should transport the device

and accessories always in the appropriate carrying case.

Prior to using your Gepard GPR please be sure that all batteries and accumulators are fully charged.

To charge e ternal and internal batteries, use only the approved chargers

which are part of the scope of delivery.

1.4 Danger of e plosion during e cavation

Unfortunately, the last two world wars and other conflicts have also made the ground in many places of the

world a potentially e plosive scrap heap. A host of those lethal relics are still buried in the ground. Do not

start digging and hacking for an object wildly when you receive a signal of a piece of metal from your device.

Firstly, you might indeed cause irreparable damage to a truly rare find, and secondly, there is a chance that

the object reacts in an insulted way and strikes back.

Note the color of the ground close to the surface. A red or reddish color of the ground is an indicator of rust

traces. As regards the finds themselves, you should definitely pay attention to their shape. Curved or round

objects should be a sign of alarm, especially if buttons, rings or little pegs can be identified or felt. The same

applies to recognizable ammunition or bullets and shells. Leave that stuff where it is, do not touch anything

and, most importantly, do not take any of it home with you. The killing machines of past wars have made use

of diabolical inventions such as rocker fuses, acid fuses and ball fuses. Those components have been rusting

away in the course of time, and the slightest movement may cause parts of them to break and be triggered.

Even seemingly harmless objects such as cartridges or larger munitions are anything but that. E plosives

may have become crystalline over time, that is, sugar-like crystals have formed.

Moving such an object may cause those crystals to produce friction, leading to an e plosion. If you come

across such relics, mark the place and do not fail to report the find to the police. Such objects always pose a

danger to the life of hikers, walkers, farmers, children and animals.

OKM GmbH

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