The classification specifications for the appearance of the instrument are as follows:
The appearance of the instrument is a comprehensive product of a variety of science and technology, with a wide variety of varieties, wide application, and constantly updated, and a variety of classification methods. According to the purpose and use of the use of the main measuring instrument, car appearance, tractor appearance, marine appearance, aviation appearance, navigation instrument, driving instrument, radio testing instrument, carrier microwave testing instrument, geological exploration testing instrument, building materials testing instrument, seismic testing instrument, geodetic surveying and mapping instrument, hydrological instrument, timing instrument, agricultural testing instrument, commercial testing instrument, teaching instrument, medical instrument, environmental protection instrument, etc.
1. Product appearance
The appearance of the instrument belonging to the mechanical industry products includes the appearance of industrial automation, the appearance of electrical instruments, optical instruments, analytical instruments, laboratory instruments and devices, data testing machines, climatic instruments, film machinery, photographic machinery, photocopying micromachinery, instrument appearance components, instrument appearance data, instrument appearance process equipment and other thirteen categories. They are versatile, large in batches, or the basis necessary for the instrument appearance industry.
2. Feature classification
The appearance of various instruments can be divided into several sub-categories or sub-categories according to different characteristics, such as function, detection and control objectives, structure, principle, etc. For example, the appearance of industrial automation can be divided into detection appearance, loop appearance appearance, conditioning appearance and actuator according to function; Among them, the detection surface is divided into temperature measurement appearance, pressure measurement appearance, flow measurement appearance, level measurement appearance and mechanical measurement appearance according to the measured physical quantity. According to the measurement method, the temperature measurement surface is divided into touch temperature measurement surface and non-touch temperature measurement surface; The appearance of touch temperature measurement can be divided into thermoelectric type, expansion type, resistance type, etc.
3. Other classifications
The classification of the appearance of other types of instruments is generally similar, mainly related to the development process, application habits and the classification of related products. There is no unified specification for the classification of instrument appearances, and the naming of instrument appearances is similar.
In practice, we often divide the appearance of the instrument into two categories: the appearance of automation and the appearance of portable instruments, the appearance of automation refers to the appearance of the demand for fixed devices in the field, also known as the appearance of the field device instrument or the appearance of the dial device instrument, this kind of appearance needs and other equipment to complete one or several functions; The appearance of portable instruments refers to the appearance of portable instruments, sometimes called the appearance of testing instruments, which are generally divided into two types: desktop and handheld.
There is also a classification of the appearance of the instrument, called the primary appearance and the secondary appearance, the primary appearance refers to the part of the sensor that directly feels the measured signal, and the secondary appearance refers to the part that amplifies, displays, and transmits the signal.
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