What Is Machine Listening?

The machine is a device assembled from various metal and non-metal parts, which consumes energy and can run and do work. It is used to replace human labor, perform energy transformation, information processing, and generate useful work. Machines run through the entire course of human history. However, the true "machine" in modern times was gradually invented after the Western Industrial Revolution. ^[1]

The composition of the machine:

1. Power part: It is the source of machine energy, which converts various kinds of energy into machine energy (also called mechanical energy).

2. Work part: The part that directly implements the specific functions of the machine and completes the production task.

3. Transmission part: an intermediate device that transmits, converts, or distributes the motion and power of the power part to the working part according to the work requirements.

4. Control part: it is used to control the starting, stopping and changing movement of the machine

   They are all a physical combination of people;

   There is a certain relative movement between their parts, that is, when the position of one of them is constant, the positions of the remaining ones will be determined accordingly.

   Already

   In the production process, they can replace human labor to complete useful mechanical work (such as a planed workpiece of a planer) or convert mechanical energy (such as a generator converting mechanical energy into electrical energy and an internal combustion engine converting thermal energy into mechanical energy).

   A machine that has the three characteristics listed above is called a machine. ^[1]

   Functional requirements

   The machine should have intended use. This is mainly achieved by correctly selecting the working principle of the machine, correctly designing or selecting the actuator, transmission mechanism and prime mover that can fully realize the functional requirements, and properly configuring the necessary auxiliary systems. ^[3]

   Assorted machines 2 (14 photos)

   There are many types of machinery, which can be divided into various categories according to several different aspects, such as: power machinery, material handling machinery, crushing machinery, etc. according to their functions; industries based on services can be divided into agricultural machinery, mining machinery, and textile machinery According to the working principle, it can be divided into thermal machinery, fluid machinery, bionic machinery and so on.

   In addition, in the process of research, development, design, manufacturing, and operation of machinery, it has to go through several stages with different working properties. According to these different stages, mechanical engineering can be divided into several branch systems that are connected and coordinated with each other, such as mechanical scientific research, mechanical design, mechanical manufacturing, mechanical operation, and maintenance.

   These various sub-disciplinary systems divided into different aspects overlap with each other, so that mechanical engineering may be divided into hundreds of sub-disciplines. For example, power machinery by function, which is different from thermal machinery, fluid machinery, turbine machinery, reciprocating machinery, steam power machinery, nuclear power units, internal combustion engines, gas turbines, and central power plant equipment by industry. , Industrial power units, railway locomotives, marine engineering, and automotive engineering all have complex intersecting and overlapping relationships. Marine steam turbines are power machinery, as well as thermal machinery, fluid machinery, and turbine machinery. It belongs to marine power plants, steam power plants, and possibly nuclear power plants. ^[4]