(GMT -05:00, United States of America local time) First, one novel cable force measurement method is proposed, which enables the estimation of cable force based on the recognition for cable vibration using smartphone camera. 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. According to the cable vibrations, the power spectral density can be obtained from the acceleration time-history using FFT. to Because life waits for no one, at LG USA we create consumer electronics, appliances and mobile devices that are designed to help you connect with those who matter most. The natural frequency of the bridge model is identified by the peak picking method from the power spectral densities of different vibration responses. Thanks are given to the financial support of the National Natural Science Foundation of China (51278085, 51221961). First, the vision-based cable force measurement method was proposed in this paper, and then the comparison test was conducted on the cable model to verify the feasibility of proposed method. 『劇団四季 The Bridge ～歌の架け橋～』のオフィシャルウェブサイト。 公演情報やチケット予約はこちらから。ストーリーや舞台写真、最新プロモーションVTRなどの作品情報も紹介しています。 contacts). Bridge will indicate each section and its overall progress. NEWS : Compacts & bridge… Si un bon smartphone peut être une alternative suffisante pour partir en voyage, un bridge de qualité permet la plupart du temps d’effecteur des vidéos en 4K soit full HD. 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. Both of smartphones collect the vibration data of the cable simultaneously under the artificial excitation for one minute. 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. 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. The reference coordinate system of smartphone. Whether that means cooking a nutritious, delicious meal for your family, staying connected on-the-go, sharing your favorite photos, watching a movie with your kids or creating a clean, comfortable place to celebrate the moments that matter, we'll be there for you every step of the way. Note: Each category can be expanded to sub sections. When an extreme disaster occurs, the rapid damage detection of bridges will be helpful for the quick evaluation of transportation networks for the emergency response [7]. The errors in the natural frequency values at each measuring point are within 2.63%. The model is a 15.53 m single cable, and its linear mass density is 3.95 kg/m. The natural frequency is not accurately extracted from the angle measurement of the mid span as shown in Table 7. Figure 19 plots the displacement time history responses, comparisons in time domain, and the corresponding PSD obtained from smartphone 4 and the laser displacement sensor at mid span of the bridge model. Tout ce que vous devez connaître pour apprendre le bridge se trouve dans ce module interactif et ludique. As shown in figures, although the vibration amplitudes and PSD peak values are different due to the differences of sampling rate, measuring position, and measuring item, it is observed that the same frequency components can be accurately obtained by the different methods from both of smartphone applications. The scale bridge model and the layout of the smartphone and sensors are shown in Figure 11. Comparison of the results from Orion-CC and D-Viewer. Main function interface of cable force calculation. To verify the accuracy of the displacement monitoring method based on the smartphone, a laser displacement sensor is fixed by means of steel frame at the mid span of the model. Table 2 summarizes the frequency difference and cable force identified by two methods. For brevity, the -axis (direction of gravity) acceleration responses and the rotation angle responses around -axis (vertical to span direction) are used to identify the natural frequency of the bridge model. Le module d’initiation au bridge Découvrez les règles du bridge et les notions essentielles du jeu grâce aux cours et exercices élaborés par nos experts du bridge. [10] developed a mobile application iShake using smartphones as seismologic sensors, which is possible for smartphones to measure and transmit ground motion data to a central server, and validated the accuracy of smartphone built-in sensors for seismic sensing application through shaking table tests. 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. As the experiment object, a concrete self-anchored suspension bridge model, which is designed and constructed with 1/28 scale of Zhuanghe Construction Bridge located in Zhuanghe city of China shown in Figure 9, is selected in the Bridge Lab of Dalian University of Technology. Select the location of where to save the program and click Install. Découvrez nos guides d'achat, comparatifs, tests, dossiers et bons plans du moment. 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 other ones are 4.68 and 4.59 Hz, while their counterparts measured by the reference accelerometers are 4.56 and 4.58 Hz. The natural frequencies extracted from PSD of angle measurements are compared with the previous ones measured by the reference accelerometers. 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 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. Figure 6 shows the installation of smartphones, and Table 1 shows the relevant parameters of iPhone 6 used in test [26]. InvenSense MPU-6500 gyroscope properties. As can be seen from comparison figures, the measurements of smartphone agree well with the measurements of reference accelerometers in terms of amplitude characteristics. [21] developed smartphone software E-Explorer using mobile Bluetooth communication technology to realize information delivery without any external network in the emergency events such as earthquake. If you're using Internet Explorer 9 or earlier, you will need to use an alternate browser such as Firefox or Chrome or upgrade to a newer version of internet Explorer (IE10 or greater). 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. LG Backup can backup your mobile devices LG Home screen, device settings, apps, and contacts to your computer. To properly experience our LG.com website, you will need to use an alternate browser or upgrade to a newer version of internet Explorer (IE10 or greater). Ils sont pratiques 3. To measure the dynamic characteristics of the bridge model, three smartphones and acceleration sensors are installed at mid span and one-quarter spans of the model via double-sided adhesive tape, respectively. Smartphone ou appareil photo numérique ? The peak responses are obtained as 0.38 g (left), 0.64 g (mid), and 0.29 g (right) by smartphones, respectively. Yu et al. As mentioned before, the dynamic responses of acceleration and angle in the vibration of structure can be obtained by the application Orion-CC using the smartphone-embedded accelerometer and gyroscope, and also the dynamic displacement response of the structure can be extracted by recognizing the movement of the laser spot shot on the projection plate by means of the application D-Viewer using smartphone camera. This scale bridge model consists of a main span of 7.14 m, a box girder of reinforced concrete, main cables and hangers of twisted wire rope, and two towers. A sheet of A4 white paper, on which a black circle of 25 mm in diameter is preprinted, is attached to projection plate, and then the calibration is conducted in the initial setup interface for measuring. Furthermore, it progresses from the previous single smartphone monitoring to multismartphones monitoring and from local monitoring to global data sharing, and the parameter has also expanded from acceleration as traditional measuring parameter to multiparameters such as displacement and angle. ATTENTION : Assurez-vous que votre smartphone ou tablette soit connecté au réseau du routeur auquel votre bridge est lui-même connecté. Click the Software update tab, Ensure your phone is connected to the computer and click Software update. 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. [8] proposed a new idea for mobile SHM using smartphone built-in sensors or external sensors board for the first time, carried out preliminary test to validate its feasibility and implementation, and then mentioned that mobile SHM system based on public participant under emergency condition is possible because of its features such as low cost and popularization. All of the four smartphones used in experiment are iPhone 6 with a three-axis Bosch BMA280 accelerometer [27], a three-axis InvenSense MPU-6500 accelerometer, and a three-axis InvenSense MPU-6500 gyroscope [28]. C’est un choix qui se défend tout à fait. Since bridges are of great importance to society and economy, bridge health monitoring has very practical significance during its service life. Wang, “Practical formula for cable tension estimation by vibration method,”. (language will be in the same location no matter what language bridge is set to.). Il existe au… The angle time history responses and corresponding PSD measured by three smartphones at different measuring points are shown in Figures 15–18, respectively. Again, the satisfactory agreement is observed between the frequency values obtained by the reference sensor and smartphone. [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. Finally, the cable force is estimated according to the cable length, cable linear density, and frequency difference. SHM systems have undergone significant development and been widely utilized on infrastructures, especially bridge structures [4, 5]. Ce type d’appareil est adapté à un public jeune ou familial, il passe facilement de main en main et permet de capturer l’instant facilement. Bosch BMA280 and InvenSense MPU-6500 accelerometer properties. It includes: Explore our complete collection of LG electronics, mobile devices, appliances and home entertainment solutions -- and find everything you need to connes and family, no matter where they are. In this interface, the region of interest (ROI) and the function of front or rear camera can be selected for recognizing the movement of the laser spot; the diameter of a black circle as the calibration reference can be set to determine the ratio between the actual size and the pixel size of the black circle in advance. Si vous pensez que vous allez accorder beaucoup de temps à l’étude de l’art photographique, un … Parameters, such as acceleration, displacement, and angle, are monitored using smartphone. Caméscope, action-cam, appareil photo ou smartphone • Les 4 manières de filmer Alors que le caméscope a longtemps été le seul à permettre de filmer, d’autres appareils intègrent désormais une fonction vidéo. The natural frequency of the bridge model was estimated accurately from the vibration responses of multiple structural parameters such as acceleration, angle, and displacement, with a maximum error of 2.63%. Un large choix à partir de 99€. LG.com utilizes responsive design to provide a convenient experience that conforms to your devices screen size. The natural frequency is identified as 4.58, 4.56, and 4.57 Hz, respectively, at three different measuring points by three reference accelerometers. The excellent agreement is observed between the frequency values obtained by the reference accelerometers and smartphones at different measuring points, with a maximum error of 0.44%. With the advances in sensor and computer technologies in the recent years, Structural Health Monitoring (SHM) has developed rapidly and has become a major research field in civil engineering, which provides a useful diagnostic tool for ensuring integrity and safety, detecting damage, and evaluating performance deterioration of civil infrastructures [1–3]. The frequency difference is obtained by means of peak picking method from PSD, and the cable force is determined from (1). Ils sont peu coûteux Le compact est léger et se glisse facilement dans la poche. Pour chaque test, le smartphone a été comparé à au moins deux autres modèles dont les caractéristiques et/ou le rapport qualité/prix en faisaient des mètres-étalons pertinents. [18–20] performed the hoisting monitoring for structural members of bridge based on real-time monitoring information feedback between one controller smartphone and several collector smartphones and also developed displacement monitoring software D-Viewer, which enable monitoring of structural dynamic displacements by recognizing a laser spot centroid or predefined circle target via smartphone camera. 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. Morgenthal and Höpfner [9] investigated the effect of sampling rate on acceleration measurement. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. 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. La licence de gestion phare d’Electronic Arts est revenue avec une nouvelle copie en 2018 : Les Sims Mobile. Votre appareil photo (ou votre smartphone) n’a peut-être pas le bras assez long pour capturer vos sujets préférés, comme les oiseaux dans un nid, les avions, ou … More info to come. 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 … The laser transmitter is fixed at one end of the bridge model to remain stationary during experiment. Figure 1 shows the initial setup interface. An experiment regarding multiple parameters monitoring of one bridge scale model is carried out. Select your the information you want to back up and click Next. Forced vibrations induced on the Wilford Suspension bridge. 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. Comparez et achetez votre Appareil photo compact ou bridge parmi 57 références et 7 marques (Panasonic, Canon, Nikon...). Use LG Bridge to: If you have an older device you may need to use PC Suite click here for more information. All of reference sensors are connected to a sensor node through cable, respectively, and the vibration responses are recorded in computer during measurement. LG Bridge brings all your LG devices (phones and tablets) together. if you wish to open the LG bridge, place a check mark next to the option and click finish to close the install. *** Jouez à la Coinche, Belote Contrée ou Belote Coinchée avec un partenaire et des adversaires simulés par une intelligence artificielle de haut niveau, dans cette application entièrement dédiée à cette variante de la belote classique. Personnalisez (icones, launchers etc) votre smartphone ou tablette sous Android. Copyright © 2016 Xuefeng Zhao et al. As the smartphone for experiment, two smartphones, iPhone 6, are used; the one installed with APP D-Viewer is mounted on a tripod via double-sided adhesive tape in order to extract vibration characteristics of cable for determining cable force using smartphone camera, while the other installed with APP Orion-CC is fixed on the cable model via mobile phone jacket to obtain cable force using smartphone built-in accelerometer. Acceleration measurements (right quarter span). 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. 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. Comparison of natural frequency identified from displacement measurements. Reilly et al. 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. Zhao et al. The natural frequency of the bridge model measured by the laser displacement sensor is 4.56 Hz, while the one measured by smartphone 4 is 4.68 Hz. Il est composé d’un fixe, munis d’un zoom plus ou moins puissant se repliant sur lui-même pour ne pas perdre en compacité. Xuefeng Zhao, Kwang Ri, Ruicong Han, Yan Yu, Mingchu Li, Jinping Ou, "Experimental Research on Quick Structural Health Monitoring Technique for Bridges Using Smartphone", Advances in Materials Science and Engineering, vol.