Nowadays, a safety improvement of food has been demanded strongly.Therefore, various inspections are used in the foods manufacturing process. A packing leak test is one of the inspections.To detect a packing leak, automatic online inspection systems have been required.In this research, a leak inspection system using high accuracy force detection is proposed.By using the proposed system, packing leak test is achieved at high speed and space-saving, although the conventional methods are low speed or large space.Thereby, automation of a leak inspection process progresses, and the contribution to the improvement in safety of food is expected. The validity of the proposed system is confirmed through the experiments.

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In these years, because of applications for medical analysis, such as biopsy, demand of 3D microscope is arising. Typical existing 3D microscopes are Scanning Electron Microscope (SEM) and confocal laser scanning microscopy (CLSM). SEM is a type of electron microscope that produces images of an object by scanning it with a focused beam of electrons. The electrons interact with atoms in the object, producing various signals that can be detected and that contain information about the sample’s surface topography and composition. However, SEM needs a vacuum system during measurement, and it is big size and price high. CLSM is a technique for obtaining high-resolution optical images with depth selectivity. It is its ability to acquire in-focus images from selected depths, a process known as optical sectioning. Images are acquired point-by-point and reconstructed with a computer, allowing 3D reconstructions of topologically complex objects. However, 3D measurement using CLSM is time consuming because it has to scan an object point-by-point, and 3D measurement accuracy of CLSM is about 1μm which is difficult to measure nano-structure objects. To resolve problems in existing 3D microscopes, 3D microscope using single-shot phase-shift digital holography is proposed in this paper. In proposal 3D microscope, at first, a Michelson interferometer and general optical components are used, so reduction in system size and price-down can be realized easily. Second, the proposal 3D measurement method, single-shot phase-shift digital holography, uses Fourier-transform method of fringe-pattern which has been used for interferometry originally. Using the proposal method, 3D shape of an object can be measured in real-time(60ms) with 5.5nm accuracy in height direction and 0.59μm resolution in XY plane. Finally, 3D shapes of human red blood cells are measured in measurement experiment. According to result of experiment, we conclude that the proposed 3D microscope can be applied to the field of precision medical analysis.

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Many practical tasks in industry require simultaneous determination of the surface shape and refractive index of a transparent object; for instance, these two sets of data can be used to inspect car panels, including glass ones, and to select and sort plastic bottles. Contact-type sensors have been widely used in conventional methods to obtain the surface shape of a transparent object. However, the measurement accuracy of contact-type sensors is susceptible to the influence of various factors. In addition, this method cannot be applied to soft or breakable objects. There are few non-contact methods available for measuring the surface shape of a transparent object. On the other hand, there are many methods available for measuring the refractive index of a transparent object, but these methods completely differ from methods of taking a surface shape measurement. To our knowledge, no method that can measure both the surface shape and refractive index of a transparent object has been presented. Therefore, our purpose was to develop an approach that could simultaneously measure both the surface shape and refractive index of a transparent object.

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Tardive dyskinesia is an involuntary movement appeared around the mouth mainly caused by long-term administration such as antipsychotic agents for schizophrenia patients. In this paper, a face expression measurement system is proposed in order to evaluate the early tardive dyskinesia objectively. The proposed measurement system includes a non-invasive face expression measurement function using moving images from a camera. The proposed system was applied to a schizophrenia patient observed tardive dyskinesia, and the results show the possibilities for automatic extraction of a quantitative index by frequency analysis of the measurement of face expression variation.

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Electro adhesive gel (EAG) shows a unique characteristic changing its surface adhesive property according to the applied electric field, which is named as electro-adhesive effect (EA effect). Our recent research results indicated that the EAG is feasible to be applied to fixture, clutch, damping, and brake mechanisms. While the performance of EAG has been dramatically enhanced over the past decade, the individual difference caused by the production process has been still problem. In other word, adhesive area of EAGs under the same electric filed is non-uniform and uncontrollable. In this research, to ensure stable EA effect, an electro-adhesive surface (EAS) applying 3-dimensional micro structure alternative to the EAG is proposed. The proposed EAS is composed of the 3-D micro-mesh structure fabricated by the photolithography and silicone gel. The prototype of the EAS was developed and its characteristic was experimentally investigated by microscopic observation and shear test. The result obviously shows that the EAS generates larger adhesive force in higher intensity of electric filed. Furthermore, a uniform and regular pattern of adhesion area is clearly observed. From these results, EAS has a strong possibility to improve the stability of EA effect and enhance the performance of its application devices.

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The crack propagation behavior and the internal stress field during mechanical cleavage of non-alkali glass sheets (thickness : 0.7mm) were visualized by high-speed imaging techniques. At first, the effect of scribing conditions on the fractured surface quality was investigated when the scribing wheel with surface asperities was used. It was found that the surface quality was strongly influenced by an applied load. In the case of low load conditions (∼11N), the fractured surface exhibited rugged patterns known as ‘hackle’, and it gradually changed to regular striped pattern known as ‘ribmark’ with the increase of applied load (12N∼). In order to understand the reason why the surface quality changed with the applied load, the crack propagation behavior was observed using a high-speed camera. The results showed that the generated crack hardly propagated to thickness direction when the applied load was low, in contrast to the rapid propagation under the high load conditions. Because the crack propagation behavior was likely determined by the stress field around the generated crack, the phase difference measurement, which was proportional to the principal stress difference, was conducted using a high-speed polarization camera. The results showed that the phase difference gradually vanished, i.e. the stress relaxation occurred, with the crack propagation especially in the high load conditions. By the image analysis for obtained phase difference from the polarization camera, an in-process estimation method of fractured surface quality was proposed.

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Metallic glass alloy can be a promising structural material for MEMS application because of its superior properties. However, there was limited information on fabrication and properties of thin metallic glass films. This paper reports the metallic glass film deposited by rf magnetron sputtering using a Zr₆₅Cu_17.5Ni₁₀Al_7.5 alloy target. Although the composition of as-deposited films changes along with the substrate position, it was found that films grew with relatively uniform composition at the substrate holder center facing within the target erosion circle. Ar pressure also affected the film composition. Residual stress of deposited films changes from compressive to tensile with increasing Ar pressure as crystalline metallic films did. Tensile fracture stress of deposited films rapidly decreased when the Ar pressure was higher than 0.7Pa, while the microhardness of deposited films were ∼6GPa regardless of Ar pressure. The deposited films showed glass transition behavior and the ability of micro-molding.

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Design of a complicated system is performed through collaboration of multiple domains, such as mechanical engineering, software engineering and control engineering. Its process is based on dependencies between elements of the product system, which is often differently perceived in each domain even if they have a common understanding of system elements. A design manager should coordinate the understanding gap among multiple domains. Although DSM (Design Structure Matrix) is an effective modeling method for properly planning design process focusing on dependency, it lacks facility for the coordination. This research proposes a new method called Multi-Domain DSM (MDDSM) to clarify differences of designers' understanding about dependencies in each domain, and coordinate them. MDDSM assumes a designer describes DSM based on his/her expertise. MDDSM provides a method to define reliability of dependency description according to the degree of designer's expertise of the corresponding system elements. If different designers state different dependency description, the reliability definition helps to decide which designer's description should be prioritized. It can support to sophisticatedly integrate variations of DSM description of multiple domains. A proposed method is applied to design process of a mechatronic product in order to verify its ability.

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