It is installed on the instrument panel in the cab, and the quantity depends on the design. It is used to indicate the technical conditions of relevant lighting, light signals and working systems, and send out alarm light signals for abnormal conditions. Indicating lamps using incandescent lamps as light sources are composed of lamp caps, bulbs, lampshades, connecting wires, etc. Some lamps using light-emitting diodes as indicating lamps are generally installed on the panels of panels, panels, desks and cabinets of high and low voltage power distribution devices, panels of some low-voltage electrical equipment and instruments, or other conspicuous positions. The indicator light reflecting the working state of the equipment is usually red to indicate that it is in the running state, green to indicate that it is in the shutdown state, and milky white to indicate that it is in the test state; The indicator light reflecting the position status of the equipment usually indicates that the equipment is energized when the light is on, and that the equipment is de energized when the light is off; The indicator light reflecting the working state of the circuit. Generally, the red light indicates electrification, and the green light indicates no power. To avoid misjudgment, check the integrity of the bulb or LED regularly or regularly during operation.
Industrial Control Products
Industrial control computer is a general term for tools that use bus structure to detect and control the production process, electromechanical equipment and process equipment. It has important computer properties and characteristics, such as computer CPU, hard disk, memory, peripherals and interfaces, real-time operating system, control network and protocol, computing ability, friendly human-computer interface, etc The main categories of industrial personal computers are IPC (PC bus industrial computer), PLC (programmable control system), DCS (distributed control system), FCS (field bus system) and CNC (numerical control system). Industrial control has always been the bottleneck restricting China's equipment industry and even product upgrading. The equipment manufacturing industry is the core and foundation of industry, which determines the level of national industry and science and technology, as well as its position in the global division of labor. For industrial machines such as machine tools, as domestic manufacturers, Siemens or Mitsubishi are required to provide overall motion control solutions. Core motion control products, such as linear motors, AC servo motors and systems, which are core components or application solutions for precise motion control, are provided by foreign multinationals as a whole, and their products and technologies are designed by foreign enterprises. Domestic manufacturers engaged in machine tool manufacturing mostly understand the functions of these key components from the perspective of application, how to use them, and finally integrate them into a set of mechanical equipment. This is the gap in manufacturing and the direction of catching up.
Industrial Control Products
Industrial control refers to industrial automation control, which is mainly realized by the combination of electronic, electrical, mechanical and software. That is, industrial control, or factory automation control. It mainly refers to the use of computer technology, microelectronics technology and electrical means to make the factory's production and manufacturing process more automatic, efficient, accurate, controllable and visible. The emergence and promotion of industrial control technology brought about the third industrial revolution, which improved the production speed and efficiency of the factory by more than 300%. In the early 1980s, with the spring breeze of reform and opening up, foreign advanced industrial control technology entered the Chinese Mainland. Industrial control products widely used include "PLC, frequency converter, servo motor, industrial control computer", etc. These products and technologies have greatly promoted the automation process of China's manufacturing industry and made great contributions to China's modernization. The emergence of industrial control has improved the safety and accuracy of manufacturing and construction industries, and solved the original industrial needs of temperature, pressure, gas flow, liquid flow, etc. The semi-automatic and manual work that was originally required will be transformed into automatic work, including common air switches, pressure transmitters, flow meters, etc. Working principle of industrial control: for example, the power control of air switch. When the power of the electrical appliance is too high, the internal mechanical principle starts to operate, causing the switch to automatically disconnect, so as to ensure the safe use of electricity in industry or buildings and accurately find the source of short circuit.
LED (Lighting Emitting Diode) lighting is LED lighting, which is a semiconductor solid light emitting device. It uses the solid semiconductor chip as the light-emitting material, and emits excess energy through carrier recombination in the semiconductor to cause photon emission, which directly emits red, yellow, blue and green light. On this basis, it can emit light of any color by adding phosphor based on the principle of three primary colors. The lighting fixtures made of LED as the light source are LED lamps. Among LED lighting fixtures, LED lighting fixtures for reflective purposes can be completely competent for any occasion, and large area indoor lighting is not yet mature. The LED of LED light source is made of III-IV compounds, such as GaAs (gallium arsenide), GaP (gallium phosphide), GaAsP (gallium phosphorus arsenide) and other semiconductors, and its core is a PN junction. Therefore, it has the I-V characteristics of the general P-N junction, that is, forward conduction, reverse cut-off and breakdown characteristics. In addition, under certain conditions, it also has luminous properties. Under forward voltage, electrons are injected into P region from N region, and holes are injected into N region from P region. A part of the minority carriers (minority carriers) entering the other side's region are compounded with the majority carriers (multi carriers) to emit light.
Lamps and illuminating articles generally refer to the appliances that can be illuminated. In ancient times, human beings used torches to light, and then candles and oil lamps came into being. In ancient times, "candle" was a kind of torch made of flammable materials, which was used to hold the lighted torch, called candle; Piles of fine grass and branches placed on the ground for lighting are called Liao, those placed outside the door are called Da Zhu, and those inside the door are called Ting Liao. Lamps and illuminating articles generally refer to the appliances that can be illuminated. In ancient times, human beings used torches to light, and then candles and oil lamps came into being. In ancient times, "candle" was a kind of torch made of flammable materials, which was used to hold the lighted torch, called candle; Piles of fine grass and branches placed on the ground for lighting are called Liao, those placed outside the door are called Da Zhu, and those inside the door are called Ting Liao.
The words switch are interpreted as open and closed. It also refers to an electronic component that can open a circuit, interrupt current flow or make it flow to other circuits. The most common switch is an electromechanical device that is operated by a person, with one or more electronic contacts. The "closed" of the contact indicates that the electronic contact is on, allowing the current to flow; The "open" of the switch means that the electronic contact is not conductive to form an open circuit, and no current is allowed to flow. Classification according to use: fluctuation switch, band switch, recording and playing switch, power switch, preselection switch, limit switch, control switch, transfer switch, disconnector, travel switch, wall switch, intelligent fire switch, etc. Classification according to structure: microswitch, ship type switch, button switch, toggle switch, button switch, key switch, as well as fashionable membrane switch and point switch. Classification according to contact type: switches can be divided into three types according to contact type: a type contact, b type contact and c type contact. The contact type refers to the relationship between the operating condition of "the contact closes after operating (pressing) the switch" and the contact state. The switch with appropriate contact type shall be selected according to the application.
To check whether the terminal voltage is good or not, professional testing equipment is required. Common terminal detection equipment includes terminal section analyzer (MQ-200E) UL is the abbreviation of Underwriter Laboratories Inc. UL certified terminals are wiring terminals that have passed the UL safety test. Some terminals have passed the UL safety test. They are the most authoritative in the United States and the largest non-governmental institutions engaged in safety testing and identification in the world. It is an independent, non-profit, professional organization that conducts experiments for public safety. It uses scientific testing methods to study and determine whether various materials, devices, products, equipment, buildings, etc. are harmful to life and property and the extent of harm; Determine, prepare and issue corresponding standards and materials that can help reduce and prevent loss of life and property, and conduct fact finding business.
The terminals are the components that connect the battery to the external conductors. In electrotechnics, terminals refer to wiring terminals, also called wiring terminals, which are classified into single hole, double hole, socket, hook, etc., and materials, including copper silver plating, copper zinc plating, copper, aluminum, iron, etc. Their function is mainly to transmit electrical signals or conduct electricity. In the project, it is the interface reserved by the pre station project for the post station project and the embedded facility of the post station interface project. The terminal section inspection microscope can produce upright three-dimensional space image when observing objects, with strong stereoscopic sense, clear and wide imaging, and long working distance; It is equipped with a high-precision harness terminal image measurement and analysis system, which is combined into a harness terminal detection microscope. The perfect combination of high-quality optical system and high-resolution camera makes the section image clearer, and the unique multiple and fixed file makes the measurement more accurate.
The basic performance of connectors can be divided into three categories: mechanical performance, electrical performance and environmental performance. Another important mechanical property is the mechanical life of the connector. Mechanical life is actually a durability index, which is called mechanical operation in the national standard GB5095. It takes one insertion and one extraction as a cycle, and takes whether the connector can normally complete its connection function (such as contact resistance value) after the specified insertion and extraction cycle as the judgment basis. 1. Mechanical property As far as the connection function is concerned, the insertion and extraction force is an important mechanical property. Insertion and pull-out force is divided into insertion force and pull-out force (pull-out force is also called separation force), and their requirements are different. There are provisions on maximum insertion force and minimum separation force in the relevant standards, which shows that from the perspective of use, the insertion force is small (so there are structures with low insertion force LIF and no insertion force ZIF), and if the separation force is too small, the contact reliability will be affected. The insertion and withdrawal force and mechanical life of the connector are related to the contact structure (positive pressure), the coating quality of the contact part (sliding friction coefficient) and the dimensional accuracy (alignment) of the contact arrangement.
Connectors are also called connectors. It is also called connector and socket in China, generally referring to electrical connectors. It refers to the device connecting two active devices to transmit current or signal. The male and female terminals can transmit information or current through contact, which is also called a connector. 1. Improve production process The connector simplifies the assembly process of electronic products. It also simplifies the batch production process; 2. Easy to maintain If an electronic component fails, the failed component can be quickly replaced when a connector is installed; 4. Improve design flexibility The use of connectors enables engineers to have greater flexibility when designing and integrating new products and when composing systems with components.
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