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The amorphous alloy transformer has less no-load current and loss, but the structure characteristics of the runway shape winding make it show greater vibration intensity and noise at the load condition. Based on the structure characteristics of the amorphous alloy transformer with runway shape winding, a leakage-stress-acoustic coupled calculation model is proposed to calculate the electromagnetic...
According to the world health organization survey, the number of patients died of disease of heart head blood-vessel per year up to 15 million, a serious threat to human health. Vascular Interventional Surgery (VIS) has been an effective method for treatment of vascular diseases. However, the surgeons are exposed to X-ray threatening the surgeons' health due to the depositing which lasts long. It...
The capsule microrobot will play an important role in the medical application such as the minimally invasive surgery in the future. In this paper, we proposed the spherical capsule robot system driven by the external magnetic field. And then we did the finite element analysis of the electromagnetic device involved in the system using ANSYS software. In the end, to verify our analysis results and establish...
This paper proposed a novel muscle force evaluation method to evaluate the patient's rehabilitation condition in the process of rehabilitation training. According to the related literature research, the complexity of the electromyography (EMG) signals were different under different muscle force. The physiological features and the state of muscle can be indirectly speculated by detecting the change...
This paper proposed a multidimensional information monitoring method for a novel master-slave robotic vascular interventional system. We have designed a contact force sensor based on pressure sensitive rubber to transmit the force information to surgeon to improve the security during VIS (vascular interventional surgery). Furthermore, the motion information of catheter is also monitored in the information...
This paper proposed a novel grasper for a novel master-slave robotic catheter navigation system in Vascular Interventional Surgery (VIS). The developed novel grasper can imitate the catheter grasping motion of the surgeon during VIS. The grasper is a key factor to drive the catheter into the vessel accurately. It adopts a common structure like the pliers, which can guarantee that the catheter can...
Manual operation of steerable catheter is inaccurate in minimally invasive surgery, requires dexterous and efficient manipulation for the catheter and exposes the surgeons to intense radiation. A novel robotic catheter manipulating system has been developed to reduce the performance error and irradiation to surgeons. In addition, unlike the conventional technique which requires surgeons to manipulate...
A wireless microrobot may be used in the small space and biomedical practice, especially in the industrial field and biomedical application. In this paper, we designed a new kind of wireless microrobot with symmetrical spiral structure, which have more compact volume, completely symmetrical mechanical structure, quick response, forward-backward motions and can clean the dirt adhering to the inner...
Muscle forces modeling and computation around the elbow are focused on in this paper when the elbow flexing and extending in the sagittal plane. The paper introduces a Rehabilitation Intelligent Training System (RITS) for restoration of motor function. The system has advantages of small size, less weight and interaction during the rehabilitation process. Furthermore, this system mainly consists of...
Increasing attention has been paid on Vertical Axis Wind Turbine (VAWT) to improve the poor aerodynamic performances. In this paper, we obtain the aerodynamic coefficients of blades by the method of simulation and experiments, and present along with a prototype of Variable-pitch VAWT. Then, mathematical model and dynamic model have been built, and individual active control for computing the optimal...
Endovascular intervention is expected to become increasingly popular in medical practice, both for diagnosis and for surgery. Accordingly, researches of robotic systems for endovascular surgery assistant have been carried out widely. Robotic system takes advantages of higher precision, can be controlled remotely etc. In this paper a novel robotic catheter manipulation system is presented. The developed...
In this paper, a novel robotic catheter system was proposed, which can be used to assist surgeon to do the operation of vascular interventional surgery (VIS), the robotic catheter system can measure the contact force and friction between catheter and blood vessel, we used load cell to measure the friction between catheter and blood vessel, the friction can be transmitted to the operator's hand as...
In this paper, a new master-slave robotic catheter system for minimally invasive surgery (MIS) has been proposed, it can be used for training unskilled surgeons to do the operation of intravascular neurosurgery. Comparing with the previous catheter operating systems, the new master-slave robotic catheter operating system has good maneuverability. The new master-slave robotic catheter operating system...
In this paper the author proposed a new kind of catheter operating system. The system is with the structure of master and slave. For master side a controller with force feedback is designed. And For slave side a catheter operating robot is designed. Also force sensors are installed on the catheter to get the force information of the front-end of the catheter. With the system the intracavity intervention...
Rolling moment is a main design basis of rolling mills. The coefficient of moment arm is an important parameter for calculating rolling moment. It has significant influence on the calculating results. There are many factors that have much influence on the coefficient of moment arm in which tension is a significant one, but the influence of tension on the coefficient of moment arm is still a pendent...
We have developed a novel catheter operating system with danger avoiding method in this paper, which included a highly precise master-slave remote control system. We used micro force sensors to realize haptic feedback, and used web camera and developed algorithm to realize visual feedback, with the help of visual and haptic feedback, surgeons can avoid danger effectively in the process of minimally...
To understand the dynamic responses of bridges and surrounding environment induced by high-speed train, and thus to serve the rapidly developed high-speed railway engineering of China better, the field dynamic responses of bridges and surrounding environment caused by high-speed train on Wuhan-Guangzhou Passenger Special Line were measured, and the vibration acceleration of bridge, and wheel unloading...
We have developed a force display method for a catheter operating system in this paper. We designed micro force sensors and used them in the system to ensure the operation security in intravascular neurosurgery applications. We also used camera to monitor the situation of simulation experiment, and used developed force display system to monitor the changed force that catheter contacted with blood...
A family of spherical parallel mechanisms which have fully decoupled motions is presented in this paper. The condition required for synthesizing the fully decoupled parallel mechanism is derived from the screw formulation of Jacobian matrix. According to this condition, several novel decoupled spherical parallel mechanisms are obtained. The decoupled motions are validated by the simulation of the...
This paper presents a novel simple method, IMGA, to solve the instantaneous motion problem of parallel mechanism. Based on the geometric regularity between constraints and motion of rigid body, IMGA method can be used to judge all the feasible instantaneous motion of parallel mechanism, and the type synthesis of instantaneous motion-free parallel mechanism. Based on the 3-PRS parallel mechanism, two...
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