Although many studies exist on mobile robot path planning, the disadvantages of complex algorithms and nodes in logistics warehouses manufacturing workshops are obvious, mainly due to inconsistency map environment construction pathfinding strategies. In this study, improve efficiency Delaunay triangulation algorithm was used process obstacles generate Voronoi points as priority nodes. The concept grid extract obstacle edges provide avoidance strategies for pathfinding. Subsequently, search...

Abstract To solve the problem of severe wear and low rock-breaking efficiency a conical pick during rock cutting, method using sawblade is proposed, which can improve ability efficiency. Test benches for cutting conical-pick breaking were established to verify numerical simulation model accuracy. The rock-cutting was used investigate effect parameters on performance. Based results rock-breaking, prediction force specific energy consumption combined with developed. This provides comparative...

The conical pick is the most crucial tool of roadheader for breaking rock, establishing cutting rock and fatigue life numerical simulation models to investigate influence parameters on damage, average peak force, specific energy life. research results indicate that width depth damage increase with increasing speed. force have same changing tendency. trend stress opposite relationship. optimum angle 45°. Applying guiding optimization reduces improves

Based on the background of a mine, this study aimed to improve underground wireless communication. The selected Zigbee technology from many technologies as basis, expounded technical advantages and disadvantages, addressed its disadvantages. First, modulation was improved. This article selects describes O-QPSK three technologies, thereby addressing synchronization difficulties caused by inherent reasons, proposes method based feedforward timing. Moreover, excellent performance achieved in...

Abstract Aiming at the problem of easy misdetection and omission small targets long-distance vehicles in detecting traffic scenes, an improved YOLOX_S detection model is proposed. Firstly, redundant part original network structure clipped using compression strategy, which improves inference speed while maintaining accuracy; secondly, Resunit_CA constructed by incorporating coordinate attention module residual structure, reduces loss feature information to target features; thirdly, order...

Piled embankments are becoming widely used to cope with engineering problems (e.g., excessive settlements, bearing failure) caused by soft soil subgrade maintain the safety and stability of constructed facilities. This study focused on an international motor-racing circuit currently under construction, where underlying substratum characterized a high void ratio compressibility may largely influence long-term performance project. Pretensioned high-strength concrete (PHC) pile-supported...

In the present work, working state of crane leg is analyzed and discussed, its structure optimized. SolidWorks software used for modeling; ANSYS finite element analysis. First all, constrained method (CFEM) to analyze linear eigenvalue buckling geometric nonlinear outriggers with different cross-section shapes. Prove that curved has certain advantages in buckling. At same time, analyzing along a path condition stress changes provide basis design subsequent reinforcement. After selecting best...

This case study focuses on an International Circuit project in China where unmanned automobiles are to be tested the future. The subgrade undergoes extensive settlement because of widely distributed lacustrine deposits with high void ratio and compressibility. Prestressed high-strength concrete (PHC) pile-supported earth platforms used for ground improvement this area, but their effectiveness has not yet been confirmed. Associated adoption, negative skin friction (NSF) piles related neutral...

In this paper, expert system and ontology technology are studied. Framework model of ontology-based selection matching is built up by using the language OWL. Ontology query retrieval introduced achieved QueriesTab tool which a plug-in protégé. OWL stored in database MySQL language. At last, we did experiment Protégé to test result. The result shows that Ontology-based can achieve function coal mining equipment correctly.

The rock cutting process with a circular sawblade and the breaking mechanism of are studied numerical simulation method in this paper. influence parameters on force, damage, specific energy is researched. force increases feed speed an increase depth decline rotation speed. Cutting double sawblades can reduce force. However, declines distance between sawblades. have great damage range rock. research results be applied to processing sawblade.

The poor loading performance of shearer drums restricts the development and production efficiency coal in thin seams. Changing operation structural parameters can improve drum’s to some extent, but effect is not obvious. A two-segment differential rotational speed drum (TDRSD) was proposed after analyzing influence mechanism on particles. To further reveal principle, velocity, particles distribution, rate were analyzed. matching relationship helix angle between front rear are also discussed....

In this paper, a electromechanical management platform for 18 producing mines and the majority of been constructed has built up on base comprehending equipment processes features in coal mining enterprises, based communication Gigabit Ethernet channel. The fully sharing collaborative exchanges operational information are achieved, so facilitated leaders, units departments exchange, query, service. This system used to regulate process management, improve efficiency, set foundation promote...

Abstract The volume detection of medical mice feed is crucial to understand the food intake requirements at different growth stages and grasp their growth, development, health status. Aiming problem calculation in way bulk mice, a method for detecting based on binocular stereo vision was proposed. Firstly, three-dimensional point coordinates feed's surface were calculated using reconstruction technology. these dense points formed cloud, then projection used calculate cloud; finally,...

A* algorithm is one of the most common algorithms in path planning for mobile robots, which can complete global search and seek lowest cost path. <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$\mathrm{a}^{\ast}$</tex> has more ability compared with other algorithms, but its long computation time, nodes drawbacks have always existed. To address these problems, this paper proposes a way to plan paths by fusing weighted Voronoi map improved...

Abstract This paper proposes a multi-condition optimization method based on single condition and weight. analyzes discusses various working states of the wide-body dump truck optimize its structure. Firstly, modal shape natural frequency carriage under conditions are analyzed using finite element method. Combined with mechanic’s theory, carriage’s force, deformation, stress studied turning partial load conditions. part provides basis for subsequent stability analysis lightweight research....

Abstract This paper describes an image processing-based technique used to measure the volume of residual water in drinking bottle for laboratory mouse. uses a camera capture bottle's and then processes calculate bottle. Firstly, Grabcut method separates foreground background avoid influence on feature extraction. Then Canny operator was detect edge liquid surface. The cumulative probability Hough detection identified line segment surface from image. Finally, spatial coordinate system is...

The circular saw blade is widely applied in rock processing; its cutting performance significantly impacts processing. Therefore, the numerical simulation model of with flexible has been established to investigate effects parameters on stress and force blade, damage into vertically at constant feed speed rotation speed. research results indicate that rises increase blade. Furthermore, increasing decrease force, vertical horizontal rising distance between double However, axial decreases. hard...

There are many different factors that influence the safe production of coal mine such as equipment factor, environment factor and artificial etc. At current, mines all over world have built up harmoniously independent mutually monitoring controlling sub-systems based on variety communicate channels protocols. In this paper, a framework model is industrial ring Ethernet in mine, four layers network demarcation put forward, method steps hardware software integrates discussed. last, design...

Starting from the actual demand of logistics enterprise information management, vehicle scheduling problem model was established and solving method found based on ant colony algorithm.At same time, Android MySQL database development environment, paper carried system requirements functional analysis, design, interface etc.The overcomes limitations other management systems, improves efficiency, realizes flexibility, intelligence digital provides a new platform for management.