Meanwhile, an international data sharing platform for cloud-SHM based on smartphone has been established, which is possible to upload the SHM data information collected by smartphone application Orion-CC and share with the public. Interprétation de conférence sur smartphone ou PC, événements ou conf call sans hardware. The main instrument parameters are indicated in Table 3. D-Viewer and Orion-CC (Orion-Cloud Cell) are typical iOS (iPhone Operating System) smartphone applications developed by our research group for Structural Health Monitoring using smartphone, which are currently available for free at the iTunes Store [22, 23]. The reference coordinate system of smartphone. Wait for the restore process to complete. The natural frequency is not accurately extracted from the angle measurement of the mid span as shown in Table 7. While it is difficult to obtain the natural frequencies at the higher mode due to the sampling rate of smartphone camera, the frequency components including the natural frequency of the first mode were estimated accurately at the lower vibration mode. Webapp ergonomique, simple, disponible 24/7. As can be seen from comparison figures, the measurements of smartphone agree well with the measurements of reference accelerometers in terms of amplitude characteristics. Smartphone application provides users with a tool for extracting structural performance parameters by various integrated sensors, processing data automatically, and transmitting data wirelessly to a central server. The rapid SHM technique based on ubiquitous smartphone with built-in sensors would make it possible for personnel to evaluate initial damage and safety status quickly, because of its features such as low cost, ease of installation, and convenience. Comparison of natural frequency identified from angle measurements. 09 février 2011, 18h17 Un peu de photo et vidéo aujourd'hui dans l'actu. [16] studied the utilization of accelerometers embedded in smartphone for measuring different types of vibration and validated its capability for SHM through vibration response test on a reinforced concrete pedestrian bridge. if you wish to open the LG bridge, place a check mark next to the option and click finish to close the install. Tan and Chen [17] verified the sensitivity and accuracy of smartphone inner sensors for measuring different vibration patterns such as sinusoidal waves of various frequencies, sinusoidal sweep, and earthquake waves through shaking table tests. J'ai entendu parler des "bridges" En cherchant à s'équiper d'un appareil photo numérique, il est possible de voir passer ici ou là ce que l'on appelle un appareil photo bridge. Since the sampling rate of the smartphone for displacement monitoring (30 Hz) is different with the reference one (100 Hz), the plots of comparisons in time domain are enlarged (between 4 s and 5 s) to show more details. An experiment regarding multiple parameters monitoring of one bridge scale model is carried out. Orion-CC is a valuable tool for an actual application of Structural Health Monitoring (SHM) because the cable force measuring method by Orion-CC has many advantages over other measuring methods, such as economy, convenience, and ease of operation. SnapBridge vous permet d’utiliser votre smartphone ou votre tablette pour prendre des photos à distance. Son limpide, interprètes de qualité. Click Ok on the pop up, if you wish to not see that message again, check mark don't show this again. The test focuses on the identification of natural frequency through the extraction of vibration response of different physical indices such as acceleration, displacement, and angle in different locations using smartphone application. Feng et al. LG Bridge brings all your LG devices (phones and tablets) together. Again, the satisfactory agreement is observed between the frequency values obtained by the reference sensor and smartphone. Un large choix à partir de 99€. Les appareils photos compact ont trois avantages : 1. In this experiment, three smartphones (1 (left), 2 (mid), and 3 (right)) installed with Orion-CC are used to measure both acceleration and angle responses of the model with a sampling rate of 100 Hz, and the other smartphone (4 (mid)) installed with D-Viewer monitors the dynamic displacement of the mid span of the model with a sampling rate of 30 Hz. Il existe au… As mentioned before, the structural static and dynamic displacements can be obtained easily by recognizing the movement of not only a laser spot but also a black circle target, by means of smartphone camera. In the case your phone gets disconnected or the update freezes, on the bottom right corner of LG bridge, select Update error recovery. Wait for the progress to complete and click Next. Further details regarding operation guide and image processing method can be found in [18]. Un large choix à partir de 139€. A novel vision-based cable force measurement method using smartphone camera is proposed, and, then, its feasibility and practicality is initially validated through cable model test. Therefore, it is necessary to develop quick SHM technique for rapid structure response monitoring and safety assessment, which will provide preliminary damage evaluation result before time-consuming common inspection can be conducted. Morgenthal and Höpfner [9] investigated the effect of sampling rate on acceleration measurement. The natural frequency is identified as 4.58, 4.56, and 4.57 Hz, respectively, at three different measuring points by three reference accelerometers. Reilly et al. The authors declare that there is no conflict of interests regarding the publication of this paper. In engineering application, the vibration method by which cable forces are estimated from measured frequency difference is often used for the measurement of cable forces due to its simplicity and speediness. [13] measured cable force of cable-stayed bridge with accelerometer embedded in smartphone, which showed that it is appropriate to estimate the cable force from smartphone inner sensors limited in precision of measurement because cable is relatively distinct in vibration rather than the other structural elements. Livraison rapide de votre Appareil photo compact ou bridge ou … Finally, the comprehensive monitoring test regarding multiple structural parameters was conducted on the scale bridge model. Note: If the language displayed from the installation is incorrect, click Settings on the top right and select the correct language from the drop down. Photo / vidéo : bridge, compact ou smartphone ? to Ce nouvel opus reprend les principes de base de la licence : le joueur crée un humain avatar dont il faudra gérer la vie, l’habitat, le travail et les r… Add a check mark to both boxes to "agree" and click Next. Sharma and Gupta [11] studied the use of smartphone in civil engineering and measured various field parameters including absolute location, distance, area, and perimeter using smartphone GPS receiver and also evaluated noise pollution using microphone of smartphone. Déjà c'est "Android Debug Bridge" et non pas "Android Debug Dridge" (disons que c'était simplement une coquille), mais surtout on ne flashe pas une partition mais un firmware ou … All Rights Reserved, Privacy Portal - Do Not Sell My Personal Information, Cell Phones, Mobile Accessories, Smart Watches, Tablets. In general, as the position at which smartphone is mounted is relatively low compared with the length of cable, the first peak in the corresponding PSD obtained by the vibration measurement of cable is not very clear, and thus it is usually difficult to identify the natural frequency of the first vibration mode for estimating cable force by the application Orion-CC using smartphone built-in accelerometer. Incredible picture quality framed as a work of art, Measuring in at an awe-inspiring 88 inches, Find helpful information about your LG product, Copyright © 2009-2021 LG Electronics. Select each of the files you wish to back up by placing a check mark next to them, once ready, click Start. Wang, “Practical formula for cable tension estimation by vibration method,”. Present SHM systems have been mainly installed on some of large-scale structures or major construction projects with great significance [6], such as long-span bridges, due to the financial problems and practical difficulties associated with instrumentation and monitoring. Wi-Fi Bridge supplémentaire : Si vous avez besoin d'un Wi-Fi Bridge supplémentaire, vous pouvez l'acheter séparément auprès de notre technicien lors de l'installation. Comparison of the results from Orion-CC and D-Viewer. Thanks are given to the financial support of the National Natural Science Foundation of China (51278085, 51221961). You can manage, update, and back up your devices all in one place. With intuitive, responsive controls, sleek, stylish designs, and eco-friendly features, our collection gives you the power to do more at home and on the go. The vibration responses obtained from smartphones and sensors were compared in both time and frequency domains. In SHM practice, the displacement monitoring of bridges has an important effect on the evaluation of the structural safety and the damage detection. Since the focus of this test is on the verification of feasibility of cable force measurement method using smartphone camera, the vibration data of the model cable acquired by Orion-CC and D-Viewer is analyzed using MATLAB. Peng et al. Orion-CC was built for iOS 7.0 or higher platform, which can obtain not only acceleration and angle but also cable force by measuring structural vibration with the smartphone-embedded accelerometer and gyroscope. Prix d'achat d'un Wi-Fi Bridge … De même, les nouveaux modèles embarquent de plus en plus de connectivités sans fil telles que le WiFi pour plus facilement télécharger ses photos et vidéos sur un smartphone ou ordinateur . (language will be in the same location no matter what language bridge is set to.). Smartphone-based bridge health monitoring and postevent damage evaluation have advantages over the conventional monitoring techniques, such as low cost, ease of installation, and convenience. Cimellaro et al. Forced vibrations induced on the Wilford Suspension bridge. Android device (version 2.3) recorded acceleration data of shaking table with a sampling rate of 27 Hz under excitations of different frequencies. Ou recherchez-vous l'étiquette ou le label de retour ? Parameters, such as acceleration, displacement, and angle, are monitored using smartphone. [14] proposed a combination method of external sensor board and smartphone by a serial port or Wi-Fi interface to improve measurement accuracy, integrated high-precision micro electromechanical system (MEMS) sensors, and then validated its accuracy through vibration test on a three-layer steel frame model. The distance between smartphone and cable model is adjusted using the tripod according to the size of panel in order to ensure a whole white background. D-Viewer is a smartphone application for monitoring structural dynamic displacement with the aid of laser device and projection plate. Zhao et al. The model is a 15.53 m single cable, and its linear mass density is 3.95 kg/m. Yu et al. Main function interface of cable force calculation. 34 % des tourdumondistes solos ne prennent pas d’appareil photo (17 % des voyageurs en couple) et se contentent d’un smartphone (ou d’une GoPro) pour prendre leurs photos. Conseil : créez un compte My Hue ! Les Simset les smartphones, c’est une longue histoire. The tests demonstrated that it is possible to extract the dynamic characteristics of the bridge from the various kinds of vibration responses using smartphone and verified the feasibility, accuracy, and reliability of bridge health monitoring method using smartphones. We apologize for this inconvenience. Philips Hue n'est pas seulement une ampoule connectée, mais tout un système d'éclairage connecté. A laser device is installed on the monitored object, the movement of the laser spot shot on the projection plate is recognized by the camera of smartphone, and then the real-time structural displacement is obtained by means of image processing method. Therefore, the cable force can be extracted directly and rapidly by the application Orion-CC without any professional inspection device and training. The cable model is installed in the Bridge Lab of Dalian University of Technology.

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