Recent Patents on Engineering - Volume 16, Issue 6, 2022

Background: The trachea is an important part of the respiratory system. Long-term airway diseases and the effects of human physiological conditions can cause trachea stenosis. This will seriously affect patients’ physical health. Tracheal stents can provide durable support by means of dilating the narrowed area; they can effectively relieve the patient's breathing difficulties, which is of value that is more practical. Objecti Read More

Background: Pulverized coal detection is an indispensable detection measure in the coal industry. The current detection devices can be divided into two types: invasive and non-invasive. The coal dust detection methods and devices based on acoustics, optics, and electricity have been extensively studied. In order to achieve a high-efficiency online detection scheme, improving the accuracy and stability of the detection means is th Read More

Background: 3D printing technology is widely applied in transportation, industrial equipment, medical, aerospace, and civil industry due to its less use of material, no requirement of manufacturing model, and machinability of complex parts. The mechanical structure of a 3D printer mainly includes a 3D printer head structure and working platform. It plays a major role in the machining efficiency and processing accuracy of t Read More

Background: Sliding bearing is a kind of bearing that works under sliding friction, which has the characteristics of stable operation, safety and reliability, and is noiseless. With the technological progress of the machinery industry, modern machinery and equipment is developing in the direction of high speed and heavy load, its power is getting higher and higher, and the working environment is getting worse, so plain be Read More

Background: As the demand for petroleum products grows, pipes to carry these products are also required extensively. Consequently, petroleum pipe blockage has become a frequent and severe problem in China. In order to ensure trouble-free operation, it is necessary to clean and inspect the petroleum pipe regularly. However, currently available petroleum pipe inspection gauges can block the petroleum pipe easily, and th Read More

Background: The equations of Monge-Ampère type which arise in geometric optics are used to design illumination lenses and mirrors. The optical design problem can be formulated as an inverse problem: determine an optical system consisting of a reflector and/or refractor that converts a given light distribution of the source into a desired target light distribution. For two decades, the development of fast and reliable numeri Read More

Background: The failure model is an important basis for research on material failure and fracture, and plays an important role in the finite element simulation of metal cutting. Johnson- Cook damage model is widely used to predict the onset of damage to many materials. Its damage evolution is controlled by five parameters. Objective: This study aimed to decrease the cost of damage parameters’ identification and find out the d Read More

Background: To reduce environmental pollution and improve resource utilization, lightweight equipment has become an important development trend of manufacturing. Therefore, thin-walled parts are being widely used in automobiles, aerospace, etc. due to their lightweight and high specific strength. However, they usually deform during machining due to poor stiffness. Objective: To reduce the machining deformation, the fini Read More

Background: The supporting quadric method (SQM) is a versatile method for designing freeform optics for desired irradiance redistribution, but the time of solution optimization increases rapidly with the refinement of the mapping grid. Objective: As the complexity of light distribution is getting higher and higher, time consumed will also increase exponentially. This paper proposes an idea of applying the deep neural network met Read More

Background: In some applications, retaining the residual noise at a specified frequency can provide a better vehicle interior sound quality for occupant’s driving experience. The hybrid vibro-acoustic adaptive noise equalizer (HVA-ANE) algorithm introduces a sound retention factor on the basis of the hybrid vibro-acoustic filter-u, and filter-x least mean square (HVA-FUXLMS) algorithm to achieve control of the sound quality, Read More

Background: Induction motor plays a major role in various industries, and its importance is increasing. Due to the environmental temperature or sealed working environment, heat generation is generally severe. The heat exchange with the outside environment does not take place smoothly, and the motor temperature increases. The performance of the induction motor is also significantly influenced by the temperature. Ther Read More

Background: With the development of robotics, more and more robots are being used in industrial production. However, as the production environment surrounding the robots becomes increasingly complex, there is a need for more intelligent industrial robots. For improving the intelligence of industrial robots, the most important thing is to ensure that they can carry out safe industrial production activities in a co Read More