This article proposes thermography as a non-contact diagnostic tool for assessing drive reliability. The application of this technique during the operation of the belt transmission with a heat-welded thermoplastic polyurethane V-belt was presented. The V-belt temperature changes depending on the braking torque load at different values of the rotational speed of the active pulley, which were adopted as diagnostic characteristics. In this paper, the surface morphology of the polyurethane (PU) belts was assessed on the basis of microscopic and hardness tests. A surface roughness tester was used to evaluate the surface wear. The surface morphology and topography of the materials was determined by scanning electron microscopy (SEM) and optical microscopy. It was found that the most favorable operating conditions occurred when the temperature values of active and passive connectors were similar and the temperature difference between them was small. The mechanical and structure results indicate that the wear of the PU belt was slight, which provided stability and operational reliability for V-belt transmission. The microscopic images lacked clear traces of cracks and scratches on the surface, which was confirmed by the SEM observations.

In this, work, metal inserts were joined with polyamide 6 by using the injection-molding technique. The metal parts, made of steel grade DC 04, were mechanically interlocked with polyamide 6 (PA6) by rivets as a mechanical connection between both components in the form of s polymer filling the holes in the metallic parts. The mechanical-interlocking joints made of steel/PA6 were mechanically tested in a tensile-lap-shear test. The damage behavior of the joined materials in relation to rivet number and position on the metal plate was studied. The observation of rivet deformation was also conducted by infrared IR thermography. The study showed that, for polymer–metal joined samples with fewer than three rivets, the destruction of rivets by shearing meant sample damage. On the other hand, when the polymer–metal joint was made with three or four rivets, the disruption mechanism was mostly related to the polymer part breaking. The maximal values of the joint’s failure force under tensile-shear tests were achieved for samples where three rivets were used. Moreover, strong correlation was found between the surface temperature of the samples and their maximal force during the tensile-lap-shear test.

Standard procedures for carrying out the inspection of the bridge or the assessment of its technical condition and suitability for use, rely on visual assessment made by the inspector and are in a certain part subjective. The main objective of the article is to analyze the applicability of IR as a tool to support the inspections of the structure and equipment elements of bridges. We are looking for the relationship between temperature distribution on an element surface (registered by an infrared camera) and hidden defects, which may be associated with, among others, moisture, discontinuity or delaminations in concrete structures. The study was divided into three parts: numerically simulated experiments of transient heat transfer, laboratory tests of reinforced concrete (RC) slab and some in-situ tests of a real bridge. To improve the effectiveness of damage detection, discrete two-dimensional wavelet transformation was applied.

This study concerns the application of infrared camera for injection molding analysis by measuring temperatures of both injection molded parts and injection mold cavities in a function of injection cycles. The mold with two cavities, differing in thickness (1 and 3 mm), and a cold direct runner was used. Isotactic polypropylene homopolymer was utilized to produce parts. Mold temperature was set at 22°C and controlled by a water chiller. Five measuring points were determined: SP1, SP2 (placed in the 3 mm cavity), SP3, SP4 (located in the 1 mm cavity) and SP5 around an injection molding gate. Our investigations showed that the highest temperature is localized around SP2 point and the lowest at SP4. Also, it was proved that even after 62 injection molding cycles, temperatures of cavities were not stable, revealing their further increase with each cycle.

The geometric (spatial) resolution is defined as the thermograph ability to reproduce the geometrical details in the thermal image. There are numerous methods described in the literature to define the geometric resolution of the thermal imaging systems [1], [2], [3], [4], [5]. Sometimes makes it difficult to compare the metrological features of these devices carried to determine their ability to distinguish in the thermal images of tested objects their geometric details. The paper presents some of the most common ways to define this parameter and the methods of comparing their values.