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HK: Fachverband Physik der Hadronen und Kerne

HK 23: Poster

HK 23.34: Poster

Dienstag, 11. März 2025, 17:30–19:00, Foyer Physik

Upgrade of a general-purpose data logging system for detector laboratories — •Benedikt Ferdinand Peter, Philip Hauer, and Bernhard Ketzer — Helmholtz-Institut für Strahlen- und Kernphysik, Universität Bonn

Measurements in laboratories are often prone to variations of environmental conditions such as changes in temperature T, pressure p and humidity H. Therefore, it is indispensable to measure and log these parameters as precisely and reliably as possible.

This is especially important for gaseous detectors, where variations in T and p are known to strongly affect the gas gain. In order to monitor environmental conditions as well as the properties of the detector gases, we have developed a data logger that can be placed in the vicinity of the experiment, inside the gas system or inside the detector to directly measure T, p and H of the active medium during the experiments.

The logger employs different sensors that are connected to a microcontroller which has a built-in WiFi chip. This connects to a local wireless network that is created by a Raspberry Pi. Via the MQTT protocol, the recorded data is sent to the Raspberry Pi, which forwards the data to a database for long-term storage.

The second iteration of these devices first includes a translation of the source code from C to Python, for the purpose of better readability and maintenance. The DHT22 sensor was replaced by the BME280 due to its better resolution and ease of implementation. Secondly, a PCB was designed to plug into the gas tubing.

Keywords: datalogging; wireless readout; temperature; pressure; humiditiy