How to calculate the nodal force of the front lead

1. Do you mainly calculate the resistance of the bearing? This force is hard to calculate

2. The concept of the Internet of things has been put forward for many years. In recent years, with the popularity of big data and artificial intelligence, the Internet of things seems to fade out of people's vision. However, as a relatively mature technology, the Internet of things has been deeply implemented in instry. Many domestic instrial companies have launched IOT concept network in a shares and US shares. What are the instrial IOT concept stocks in 2018? Let's take a look at it today
PTC (NASDAQ: PTC) recently announced the publication of a series of research reports on the status of instrial innovation, which are published twice a year. Based on the data of PTC customer base, this series of reports provides objective analysis of the current development status and future promotion plans of instrial Internet of things (IOT) and augmented reality (AR) technology. Each report examines the instries that drive the popularity of these two technologies, the functions and use cases deployed across the blockchain, and the types of business value they bring
Mike Campbell, executive vice president of thingworx platform of PTC, said: "with the continuous maturity of the technology and business model of instrial Internet of things and AR, its popularity will show a rising trend. PTC combines market experience and massive penetration data to truly examine these rapidly evolving markets from a comprehensive perspective. "
as described in the "status quo of instrial Internet of things" and "status quo of instrial augmented reality", instrial Internet of things and Ar are no longer just promising emerging technologies. In 2018, investing in such technologies has become a key strategy for many organizations, especially for technology stocks that involve complex manufacturing and operational processes. Among the PTC customers who have adopted the instrial Internet of things or AR technology, 83% and 85% of the instrial Internet of things users and AR users have migrated to the full-scale proction environment or plan to complete the migration in the next 12 months, respectively< The main points of the report are as follows:
current situation of instrial Internet of things
1. At present, the instrial Internet of things is mainly used by large proct manufacturers in instrial procts (25%), electronics and high technology (22%), automobile (13%) and aerospace and national defense (11%)
2. The economic potential of instrial Internet of things has attracted the attention of the international community, and has spawned some global initiatives aimed at promoting the development of global instrial Internet of things< At present, most of the solutions are used in manufacturing and operation (48%), and the collected data can be used to improve the process, forecast the maintenance demand and improve the overall operation efficiency
Instrial Internet of things is no longer an emerging technology - it has developed into a mature and widely recognized stage. The instrial Internet of things is now being deployed in large quantities, involving a wide range of functions from proct development to manufacturing and services
current situation of instrial augmented reality
instries such as instrial procts (21%), automobile (11%), aerospace and national defense (8%) are leading the initial popularization of AR
AR is widely used in all aspects of the value chain, especially in service (19%) and manufacturing (18%)
AR can become a powerful tool for operation tips and guidance, thus providing an entry point for many organizations, especially those instries involving hundreds of key processes, such as real-time monitoring and improving equipment overall efficiency (OEE)
large scale investment in underlying hardware and software technology will promote ar penetration to a critical point, so that pilot projects can quickly migrate to the full proction environment< Relevant concept stocks:
000701 Xiamen Xinda: the first batch of partners of Alibaba IOT platform
300203 focus technology: the company signed a strategic cooperation framework agreement with the people's Government of Zhangqiu City, Shandong Province, to build "smart environment cloud data center", "smart environment decision-making and public service platform", "smart environment emergency command and scheling platform" and "atmospheric haze pollution monitoring and warning platform"
300007 Hanwei Technology: the leader of domestic gas sensors, mass proction of flow and pressure sensors, establishment of municipal gas IOT network subsidiary; 51% equity of Shenzhen Mingzi IOT Technology Co., Ltd
000851 Gaohong: at present, Datang Gaohong has clearly focused on the development of RFID Business in logistics application and value-added application of the combination of RFID and TD
002881 megger Intelligence: main business: wireless sensor network system solutions, MEMS sensor chips< Haitong news: the company is the largest supplier of communication network physical connection equipment in China
300590 move to communication: the company brings together technical experts and business elites in the field of wireless communication technology, and is a leading provider of wireless Internet of things devices and solutions in the instry
300259 Xintian Technology: xiongan + Alibaba Internet of things, al concept
300205 Tianyu Information: a leading provider of procts and solutions in the field of data security in China
300286 ankerui: the main manufacturer of intelligent power monitoring system and instrument for domestic instrial and mining enterprises
600271 Aerospace Information: committed to the research and development of IOT chip
002474 Rongji software: signed a memoranm of cooperation with Huawei and Fuzhou municipal government to jointly promote the construction of the first NB IOT Experimental Bureau in China
300131 Yingtang Zhikong: Fengtang IOT, the holding subsidiary of the company, and Tencent technology signed a cooperation framework agreement on procts and services of Internet of things
000997 New World: Taking the Internet of things as the main line, the company realizes "one main" (core technology of Internet of things perception and identification, key procts of Internet of things) "two wings" (Internet of things application and Internet of things business model innovation)
000682 Dongfang Electronics: Dongfang Electronics Group has a strong RFID instry in the core area of the Internet of things, with an authentic "Internet of things" concept
002047 BAOYING shares: it plans to increase the capital of Shenzhen guochuang Zhilian Network System Co., Ltd. with 100 million yuan in cash to obtain 20% equity. Guochuang Zhilian has LTE wireless smart city solution, wireless broadband private network system and terminal equipment, and provides solutions for government affairs and police private network, instrial Internet of things and smart city construction
002161 yuanwanggu: the company has invested in five Internet of things projects such as intelligent tracking device of railway train number
002093 Guomai Technology: the company has its own cloud platform, mass storage and big data solutions with independent intellectual property rights, and is deeply involved in the big data cloud computing of the Internet of things
300638 guanghetong: focus on the wireless communication field of Internet of things and mobile Internet, independently design and develop fibocom brand procts
300183 Neusoft carrier: chip level equipment manufacturing, benefiting from the chip demand brought by the development of Internet of things
300310 Yitong century: cooperate with Jasper, the world's best Internet of things platform, to provide Telecom grade Internet of things connection
000063 ZTE: NB IOT chip design leader 4G, 5g<
300066 Sanchuan wisdom: a leading enterprise in smart water instry in China, and at the same time marching into the big data field of Internet of things
002017 Dongxin Heping: its business scope is involved in many smart card application fields such as identity recognition and RFID (electronic tag)
300259 Xintian Technology: the company has researched and reserved nb-iot technology in the early stage, and its procts use narrowband Internet of things technology<
600100 Tongfang Co., Ltd.: the company is a supplier and system integrator of smart card and RF technology procts. Its procts involve the design and supply of IC chips such as ID, telecom, financial payment, information security, etc
002711 oupu: the company's "ground network", "Sky Network" and "Golden Network" three networks in one strategic layout
300275 mayanson: the security monitoring technology of Internet of things is leading in the instry. With the "security application of Internet of things instry", it actively arranges many emerging businesses with huge development space, such as urban pipe network and gas safety, environmental protection emergency, public security fire protection, structural safety, safety cloud service, etc
300456 Neville Technology: acquired celex MEMS foundry (the world's largest), raised 750 million yuan to build an 8-inch MEMS proction line in Beijing<
300458 Quan Technology: the design manufacturer of intelligent application processor SOC and intelligent analog chip
300098 Gao Xinxing: Guangzhou Zhixing IOT, the holding subsidiary, mainly provides IOT solutions for operators from the development of IOT related business platforms and procts, and participates in the operation and security of operators' IOT business cooperation
300101 core technology: MEMS Integrated Navigation: MEMS gyroscope and accelerometer
000727 East China Technology: East China technology is one of the core sensor manufacturers in the Internet of things instry
the above is the details of instrial IOT concept stocks in 2018. It can be seen that there are still many companies involved in IOT, and IOT will become a common technology in proction. If you still have more to say, you might as well take a look at the stock market knowledge with Xiaobian. More information is available on weishang times
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3. Force is invisible and intangible. It is a concept abstracted from people's long-term proction practice by observing the surface phenomenon of interaction between objects. The interaction mentioned here only refers to the mechanical action between objects. The result of this mechanical action is always accompanied by the surface phenomenon that the mechanical motion state of objects changes (including deformation). Therefore, the definition of force is: force is the mechanical action between objects, which makes the mechanical motion state of the object change or the shape of the object change
there are some ways of interaction between objects, such as direct contact, such as traction of locomotive to car, friction between object surfaces, etc; Some are not direct contact, such as the attraction of the earth to objects, the attraction and repulsion between magnetic objects, etc
practice shows that the effect of a force on an object depends on three factors: the size of the force, the direction of the force, and the point of action of the force. Changing any element will change the effect of the force on the object
we use the straight line segment with arrow to represent the three elements of the force vector, and the length of the vector (AB) represents the force at a certain scale; The direction of vector represents the direction of force; The beginning of the vector (point a) represents the point of action of the force. The line along the vector AB represents the line of action of the force. We often use the letter F in bold to represent the vector of force, and the letter F to represent the magnitude of force
in order to measure the force, the unit of force must be determined. In the international system of units (SI), Newton is taken as the unit of force, denoted as n. Sometimes it is also expressed in kilonewton as K n. In the engineering unit system, the commonly used unit of force is "kilogram force", denoted as KGF; Sometimes "thousand kilogram force" or "ton force" is also used, which is recorded as TF. This book adopts the international system of units. The conversion relationship between Newton force and kilogram force is
1kgf ≈ 9.8 N
force is the interaction between objects, so they must appear in pairs. When one body acts on another with a force, the other must act on it with a force of equal size, opposite direction and along the same line of action. That is, the force and reaction force are equal in size and opposite in direction, acting on two objects respectively
origin of force
under what circumstances will force be generated between two objects or between two systems? There is and only there is imbalance between them. In other words, only when there is imbalance between the two can they be proced effectively. Whether it's gravity, electromagnetic force, strong force, weak force, cosmological or microscopic, this definition applies
force system
the so-called force system refers to a group of forces acting on an object
according to whether the action lines of the forces in the force system are in the same plane, the force system can be divided into two types: plane force system and space force system; According to whether the action lines of the forces in the force system intersect or not, the force system can be divided into three types: converging force system, parallel force system and arbitrary force system
the plane converging force refers to the force system in which the action lines of all forces are in the same plane and converging at one point
any plane force refers to a force system in which the forces acting on an object are distributed in the same plane, or approximately in the same plane, but their action lines are arbitrarily distributed at different points
constraint and constraint reaction
some objects, such as flying airplanes, shells and rockets, have unlimited displacement in space. An object whose displacement is not limited is called a free body. Some objects, such as locomotives, motor rotors, heavy objects suspended on crane cables, etc., are limited in space displacement. The locomotive can only move along the track because of the limitation of the track; The rotor of the motor is limited by the bearing and can only rotate around the axis; The heavy object is limited by the steel cable and cannot fall. An object whose displacement is limited is called a non free body. The object around which some displacements of a non free body are restricted is called a constraint. For example, the rail for the locomotive, the bearing for the motor shaft, the crane cable for heavy objects, are constraints
since constraints hinder the motion of an object, that is, constraints can change the motion state of an object, the effect of constraints on an object is actually a force, which is called constraint reaction. Therefore, the direction of the constraint reaction must be opposite to the direction of motion that the constraint can block. Using this criterion, the direction of the binding force or the position of the line of action can be determined. The magnitude of the constraint reaction is always unknown. In statics, the constraint reaction force and other known forces (called the main force) on the body constitute the balance force system. Therefore, the constraint reaction can be obtained by equilibrium condition[ 2]
in physics, force is any influence that causes a free body to experience changes in velocity, direction or shape. Forces can also be described by intuitive concepts, such as thrust or pull, which can cause a mass to change its speed (including moving from a stationary state) or direction. A force consists of magnitude and direction, which makes the force a vector
the related concepts of acceleration force include the propulsion force to increase the speed of an object, the resistance to decelerate any object, and the torque to change the speed of the shaft. When a force does not uniformly act on all parts of an object, it is a stress. The influence of this technical term is that it will cause the deformation of the object. When the stress can continue to act on the solid object, it will graally deform. In the fluid, the stress determines the change of its pressure and volume
modern understanding and technology of quantum mechanics can accelerate particles to near the speed of light. Particle physics has designed a standard model to describe the force between particles smaller than atoms. The standard model predicts that the exchange of particles called gauge bosons is the fundamental meaning of force emission and absorption. Only four main interactions are known: strong, electromagnetic, weak, and gravitational

4. A: three unknown quantities (two unknown forces at point a and one unknown force at point B) can list three equilibrium equations: the balance of x-axis force, Y-axis force and bending moment around point a
because point B has smooth contact, there is no friction and only the supporting force perpendicular to the wall. We can take the distance from point a and list an equation. There is only an unknown force at point B to solve the unknown quantity. After calculating an unknown force at point B, the balance of x-axis force and y-axis force can be listed as a whole, and then two unknown forces at point a can be obtained.

5.

The node method is used

calculate g node first, as shown in the figure above

then calculate nodes F, e, D, C, B and a according to this

7. There is no specific requirement. Now the wire presses are equipped with different wire diameter die heads. According to different wire diameter, you can choose different die heads.

8. It's the volume of the foundation times the density of the concrete plus the weight of the steel
strictly speaking, the volume of reinforcement should be subtracted from the volume of foundation, but it can be ignored
different concrete grades and densities can be checked

pay attention to the unit conversion, 1kg = 9.8N

9. It is necessary to know the area of a single strand and how many strands there are, and then the area X number x controls the stress