Module Demonstrator - Exhibit for Trade Show Appearance
Distance measurements in harsh environments
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 displayed to trade show visitors on a screen 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 displayed to trade show visitors on a screen and impressively visualized using 3D graphics.
🎬 Video of development and manufacturing at Engineer Glaser's office.
https://ingenieur-glaser.de/projekt/radar-demonstrator/
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Operating principle
The distance from the sensor to the reflector is determined by the time-of-flight of the radar beam. The speed of the reflector is determined using the Doppler principle.
Reflector
The retroreflector moves in a sinusoidal motion profile linearly to the left and right. Due to the orthogonally arranged metal surfaces, it reflects the radar beam back in exactly the opposite direction even when tilted.
Sensor
The radar sensor emits electromagnetic 122.5 GHz waves at the speed of light towards the reflector. The distance determined by the time-of-flight is displayed on a screen. The corresponding graph shows the sinusoidal motion of the reflector.
Visualization
The button on the radar module toggles the display between two views.
Graph
The temporal progression of the measured distance is displayed in a 3D graph on the screen.
Raw Data
In a detailed table view, all raw data including signal strength of the sensor is displayed in real-time.
Wireless HDMI Adapter
To transfer the display content to a large monitor at the measurement stand, a Raspberry PI connects via WLAN to the radar module and accesses its web interface.
Modular Trade Fair Setup
The modular setup allows for a freely scalable exhibition stand and space-saving transport.
Power Supply
All modules are connected via cold device extensions. The cables and connections are hidden under the modules.
Transport
The bases of the modules are stackable. This allows for the transport of tables, bases, and acrylic glass hoods on a single euro pallet.
Housing and Electronics
To enable efficient manufacturing of the housings, all modules were constructed identically. The illustration shows the cross-section of all modules in a summarized representation.
In the lower section of the base, 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
Radar
The radar module contains an LPR®-1DHP-350 radar sensor and a 7-inch monitor. The web interface for visualization is provided by an ESP32 via LAN. The web server was written in C++.
To display on the monitor, a Raspberry PI 3+ calls the page in so-called kiosk mode and outputs it in full screen via HDMI.
Additional monitors can be connected wirelessly via Wi-Fi or wired using an RJ45 socket via PoE-LAN.
"Solidwall"
To demonstrate the permeability of radar waves through plastics, plates of varying thickness and material can be attached to the turntable using magnets. Through the rotational movement, these are cyclically inserted into the radar beam.
The mechanical coupling between the motor shaft and the turntable is also achieved via magnets. This makes the turntable removable and limits its torque.
The speed of the turntable can be adjusted via a potentiometer located under the base.
"Tornado"
Four dustproof and waterproof IP68 fans create a swirling airflow that carries white granulate made of EPS beads into the radar beam.
To prevent the Styrofoam beads from sticking to the disc due to static charge, the airflow is ionized. For this purpose, two ionizers are mounted under the fans. Depending on the polarity of the charge, these release positively or negatively charged ions to discharge the statically charged EPS beads.
"Waterstorm"
A high-pressure pump forces distilled water through a nozzle. The water jet bursts at the lid of the acrylic glass dome and falls in droplets.
Previous experiments with a rotating nozzle were discarded due to excessive noise generation and potential susceptibility to interference.
When immersing the acrylic glass dome into the water basin, a built-in solenoid valve opens for venting.
The pump performance can be adjusted using a speed controller located at the bottom of the base.
"Reflector"
The modules "Reflector" and "Solidwall" feature identical sockets in which a powerful neodymium-iron-boron magnet rotates in a circle. The eccentric rotational movement of the magnetic field is converted into a sinusoidal translational movement by a wide magnet integrated into the linear slide.
The linear slide is removable. This allows the reflector to be placed in the opposite orientation.
Behind the scenes
THANK YOU!
The engineering office Glaser thanks for the extraordinarily good communication, the refreshing meetings, and a successful collaboration with Symeo GmbH in Munich.
Addendum: Successful presentation of the SYMEO radar demonstrator at the SPS fair in Nuremberg
Currently, the demonstrator is being presented at the SPS fair in Nuremberg, where it impressively showcases the advantages of radar technology to visitors. Particularly impressive is that this distance sensor works reliably even under the harshest conditions such as rain and dust.
The development of the radar demonstrator for SYMEO was an enriching experience. Despite the tight schedule due to the upcoming trade fair date, we managed to complete the demonstrator 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 in terms of robustness and user-friendliness. I have never encountered such strong commitment, technical ingenuity, and universal competence in one person."
Interested in a customized trade fair demonstrator?
The engineering office Glaser develops individual customer magnets that effectively showcase your product and brand. With a customized demonstrator, you will attract the attention of trade fair visitors and leave a lasting impression.
