Multi-Channel Control System for in-Situ Laboratory Loading Devices

Abstract

In recent years, open-source applications have replaced proprietary software in many fields. Especially open-source software tools based on Linux operating system have wide range of utilization. In terms of CNC solutions, an open-source system LinuxCNC can be used. However, the LinuxCNC control software and the graphical user interface (GUI) could be developed only on top of Hardware Abstraction Layer. Nevertheless, the LinuxCNC community provided Python Interface, which allows for controlling CNC machine using Python programming language, therefore whole control software can be developed in Python. The paper focuses on a development of a multi-process control software mainly for in-house developed loading devices operated at our institute. The software tool is based on the LinuxCNC Python Interface and Qt framework, which gives the software an ability to be modular and effectively adapted for various devices.

Instrumentation of Four-Point Bending Test During 4d Computed Tomography

“…The specimen was subjected to four-point bending loading sequence performed as a force-driven experiment to ensure uniform load distribution on the supports (outer supports span L out = 180 mm, inner supports span L in = 150 mm). Experiments were con-trolled by the modified LinuxCNC software running on a real-time kernel [15]. During the experiment, displacement was interrupted at six discrete loading steps, where radiographical imaging was performed.…”

In-Situ Compression Test of Artificial Bone Foams in Controlled Environment Using X-Ray Micro-Computed Tomography

“…Values of the actual force, performed by a loadcell with nominal capacity of 500 N (HBM U9b, Germany) was recorded by a multifunction data acquisition device. The motion of the system and all other peripherals are controlled using a custom developed control software based on the open-source project LinuxCNC running on the real-time kernel [8]. The control hardware consists of high-performance motion control components (MESA Electronics, U.S.A.), sensor readout electronics (Lab-Jack T7, U.S.A.) and custom electronics.…”

High Strain-Rate Compressive Testing of Filling Materials for Inter-Penetrating Phase Composites

“…The loading setup was instrumented by a load-cell U9b (Hottinger Baldwin Messtechnik, Germany) with loading capacity 1 kN. Loading was provided by a stepper motor attached to a harmonic drive and controlled by an in-house control software based on LinuxCNC interface [6]. The loading setup for the quasi-static tests is depicted in Figure 1.…”