Exhibition model
Radar demonstrator
for robust distance measurement
Exhibition construction for the SPS fair in Nuremberg
Distance measurements in harsh environments
The exhibition model illustrates the advantages of radar-based distance measurement. Under the harshest conditions, such as rain and dust, the SYMEO sensor captures precise measurements. The measured distance is shown to fair visitors on a display and impressively visualized using 3D graphics.
Radar demonstrator for trade show appearance - Engineer Glaser
📡 The demonstrator illustrates the advantages of radar-based distance measurement. Under the harshest conditions, such as rain and dust, the SYMEO sensor captures precise measurements. The measured distance is shown to fair visitors on a display and impressively visualized using 3D graphics.
🎬 Video of development and manufacturing at Ingenieurbüro Glaser.
https://ingenieur-glaser.de/projekt/radar-demonstrator/
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Operating principle of the exhibition model
The distance from the sensor to the reflector is determined by the time-of-flight of the radar beam. The reflector's speed is determined using the Doppler principle.
Reflector
The retroreflector moves in a sinusoidal motion profile linearly left and right. Due to the metal surfaces arranged orthogonally to each other, it reflects the radar beam exactly back in the opposite direction even when mounted at an angle.
Sensor
The radar sensor transmits electromagnetic 122.5 GHz waves toward the reflector at the speed of light. The distance determined via time-of-flight is displayed on a monitor. The corresponding graph shows the sinusoidal motion of the reflector.
Visualization of the measurement values
The button on the radar module of the exhibition model switches the display between two views.
Graph
The temporal progression of the measured distance is shown on the display in a 3D graph.
Raw data
In a detailed table view all raw data including the sensor signal strength are displayed in real-time.
Wireless HDMI adapter
To transfer the display content to a large monitor at the booth, a Raspberry Pi connects via WLAN to the radar module and accesses its web interface.
Modular exhibition model
The modular design of the model enables a freely scalable booth and space-saving transport.
Power supply
All modules are connected to each other using IEC power extensions. The cables and connectors are hidden under the modules.
Transport
The bases of the modules are stackable. This allows transport of tables, bases and acrylic covers on a single Euro pallet.
Enclosure and electronics
To enable efficient manufacturing of the enclosures, the construction of all modules of the exhibition model was designed identically. The illustration shows the cross-section of all modules in a consolidated representation.
In the lower level of the bases, high-quality power supplies, programmable speed controllers and, depending on the module, the necessary control electronics for the actuator or sensor are housed.
Technical implementation of the modules
Exhibition model "Radar"
The radar module contains an LPR®-1DHP-350 radar sensor and a 7-inch monitor. An ESP32 provides the web interface for visualization via LAN. The web server was written in C++.
For display output, a Raspberry Pi 3+ loads the page in so-called kiosk mode and outputs it fullscreen via HDMI.
Additional monitors can be connected wirelessly via WLAN or wired via RJ45 socket using PoE-LAN.
Exhibition model "Solidwall"
To demonstrate the permeability of radar waves through plastics, plates of different thicknesses and materials can be attached to the turntable with magnets. The rotation cyclically brings them into the radar beam.
The mechanical coupling between motor shaft and turntable also uses magnets. This makes the turntable removable and limits its torque.
The turntable speed can be adjusted via a potentiometer under the base.
Exhibition model "Tornado"
Four dustproof and waterproof IP68 fans generate a swirling airflow that carries white granulate made of EPS beads into the radar beam.
To prevent the styrofoam beads from sticking to the glass due to static charge, the airflow is ionized. Two ionizers are mounted under the fans for this purpose. Depending on the polarity, they release positively or negatively charged ions to discharge the statically charged EPS beads.
Exhibition model "Waterstorm"
A high-pressure pump forces distilled water through a nozzle. The water jet breaks up on the lid of the acrylic cover and falls down as droplets.
Earlier experiments with a rotating nozzle were abandoned due to excessive noise and potential susceptibility to failure.
When the acrylic cover is dipped into the water basin, a built-in solenoid valve opens for venting.
The pump power can be adjusted using a speed controller at the bottom of the base.
Exhibition model "Reflector"
The "Reflector" and "Solidwall" modules feature identical housings in which a powerful neodymium-iron-boron magnet rotates in a circle. The eccentric rotational motion of the magnetic field is converted into a sinusoidal translational motion by a wide magnet integrated into the linear carriage.
The linear carriage is removable. This allows the reflector to be mounted in the opposite orientation as well.
Ooh, Aah, Wow! Customer magnets for your trade show booth.
The engineering firm Glaser develops and manufactures custom trade show exhibits. As eye-catchers they draw visitors' attention to your booth with a curious “Ooh”. The advantages of your product become clear and tangible on the demonstration model with an amazed “Aah”. With a concluding “Wow!” you, your product and your brand stay in people's minds.
Behind the scenes
THANK YOU!
The engineering firm Glaser thanks SYMEO GmbH in Munich for the exceptionally good communication, the refreshing meetings and a successful collaboration. Symeo GmbH
Addendum: Successful presentation of the SYMEO radar demonstrator at the SPS trade show in Nuremberg
The trade show model is currently being presented at the SPS trade show in Nuremberg, where it impressively demonstrates the advantages of radar technology to visitors. Particularly impressive is that this distance sensor reliably works even under harsh conditions such as rain and dust.
Developing the radar demonstrator for SYMEO was an enriching experience. Despite the tight timeframe due to the upcoming trade show date, we managed to complete the demonstration model on time.The key to success was the excellent communication and close contact with the SYMEO team. I am proud to have been part of such a forward-looking project and look forward to the further establishment of this innovative sensor technology in the market.
Dipl.-Ing. (FH) Daniel Evers
Head of Product
"Within a very short time a work of art was created that far exceeded our expectations regarding robustness and ease of use. I have never encountered such strong dedication, technical ingenuity and universal competence combined in one person."
