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System design and

productisation with

R&D companies

High accuracy ranging

ENERGY EFFICIENT EMBEDDED SYSTEMS

Our solution enables safer automated machinery which in turn reduces the

money, people and time resources. It also provides new business

opportunities in robotics, automated machine control, smart home or hospital

Our solution is based on Ultra-Wideband Impulse Radar technology which

is able to measure the environment even more than 400 times per second

with mm accuracy and maximum range of 10 - 15 meters. The UWB

Impulse Radar is immune to interference from other radio systems, to

multipath propagation, and to environmental factors like rain, fog, snow etc.

We provide technology for sub-mm accuracy distance measurements even

in harsh environments.

Process

Industrial

Internet

Specifying

measurement needs

Data analysis and

algorithm

development

Design of

measurement

system

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High Accuracy Ranging

With UWB Impulse Radar technology high

(mm) accuracy for distance

measurements/ranging is achieved

Advantages: Low-energy, high resolution,

high immunity to interference from other

radio systems, high multipath immunity,

capability of discriminating between direct

and time-orthogonal reflected waves, ability

to detect through obstacles and in dense

media, immunity to passive interference

(rain, fog, clutter, aerosols, etc)

Production ready, implementing technology

is available with reasonable price.

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Evaluation of the UWB Radar Distance

Measurements Accuracy: Measurements Setup (1/2)

)))

(((

±d

During the measurements robots were used to relocate the

radar to predefined distances from the metal plate. The

accuracy of robots movements is within 1 mm range.

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Evaluation of the UWB Radar Distance

Measurements Accuracy: Measurements Setup (2/2)

radar metal plate

radar

metal plate

Fig.1 Distance measurements from

0.5-1 m, with 5 mm intervals

Fig.2 Distance measurements from 2-10 m,

with 20 cm intervals

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Evaluation of the UWB Radar Distance

Measurements Accuracy: Results

-1

0

1

2

3

4

5

Ab

so

lut

err

or

in m

m

Index of Measurement Point 50cm:0.5cm:100cm

UWB Radar Distance Measurements: Error value

[mm]

Measured Data

-8

-6

-4

-2

0

2

4

6

8

Ab

so

lut

err

or

in m

m

Index of Measurement Point 2m:20cm:10m

UWB Radar Distance Measurements: Error value

[mm]

Measured Data

Two measurement sets were performed:

1) Distance between the radar and metallic plate varies from 0.5 m to 1 m, and distance

intervals between the measurements are 5 mm (Fig. 1)

2) Distance between the radar and metallic plate varies from 2 m to 10 m, and distance

intervals between the measurements are 20 cm (Fig. 2)

Fig.1 Fig.2

Error <4mm Error <8mm

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Additional information

VTT Technical Research Centre of Finland Ltd

Marina Eskola Research Scientist Industrial IoT +358401582286 marina.eskola@vtt.fi

Jukka Kämäräinen Research Scientist Industrial IoT +358405734421 jukka.kamarainen@vtt.fi

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