The application of transducer in the numerical control machine tool

Because of high precision, high speed, high efficiency and safe and reliable characteristics, the manufacturing technology and equipment update, the nc machine tools is rapidly gained popularity in the enterprise. Nc machine tool is a kind of a program control system of machine tool automation, can according to the program that has been programmed, the machine movement and machining parts. It combines mechanical, automation, computer, measurement, the latest technology such as microelectronics, using a variety of transmitter. Transmitter transducer ( 传感器; 测量元件; 传感器) : can you feel the rules be measured and to convert the available output signal according to certain rules of device or devices. Transmitter usually by sensitive components and conversion components, basic conversion circuit of three parts. Transducer is a physical device or biological organ, can detect, feel the outside signal, physical condition, Such as light, heat, humidity) Or chemical composition ( Such as smoke) And will ascertain the information to other devices or organs. It can feel the provisions is measured and converted into usable signal according to certain rules of the device or device, usually composed of sensitive components and conversion components. Transducer is a kind of detection device, can feel the measured information, and can detect feel the information, will change according to certain rule become electrical signal output, or other form of information needed to satisfy the information transmission, processing, storage, display, record and control requirements. It is the first step of automatic detection and automatic control. The function of the transmitter often used the transmitter function and human par five sense organs: optical transmitter & ndash; — Visual and acoustic sensitivity transducer & ndash; — Hearing, gas sensitive transducer & ndash; — The sense of smell, chemical transmitter & ndash; — Taste, pressure sensitive, win min, fluid transducer & ndash; — The classification of the tactile sensor: (1) physical class, based on force, heat, light, electricity, magnetic and physical effect, etc. (2) chemical class, based on the principle of chemical reaction. (3) biological class, based on the molecular recognition function such as enzymes, antibodies, and hormones. According to its basic awareness usually can be divided into thermal sensor, light sensor, gas sensor, force sensor, magnetic sensor, moisture sensor, acoustic sensor, radiation sensitive element, color sensor and sensor etc. 10 categories ( Others have sensitive element 46 class) 。 Transmitter in the application of nc machine tool nc machine tools in the transmitter's basic requirements 1) Transmitter has strong anti-interference and high reliability; 2) Transmitter to achieve speed and precision of the standards and requirements; 3) The use of transducer and maintenance more convenient; 4) Lower the cost of the transmitter. Different types of nc machine tools for some requirements of the transmitter also exist differences, under normal circumstances, medium and high precision nc machine tools mainly embodies in accuracy to the requirement of transmitter, and large nc machine tools mainly reflected in the speed of response to the requirement of the transmitter. 1, the application of displacement detection of displacement detection of nc machine tools in the transmitter, mainly including linear grating pulse encoder and rotating transformer, etc. 1) Linear grating is through some of the applications of the linear grating projection of light reflection, use of, is often used in displacement detection, the ability to identify high, high detection accuracy of optical encoder, is widely used in the dynamic measurement. In the process of feed drive, on the bed to a fixed grating. Dragging plate moving the actual displacement on the linear grating produced some of the pulse signal is directly reflected. Using linear grating to detect the location of the workbench of the servo system is a closed-loop control system. 2) Some applications of pulse encoder pulse encoder is a kind of speed transducer or angular displacement transducer, the transmitter can be mechanical Angle into an electrical impulses. There are three types of pulse encoder, electromagnetic, contact and photoelectric. In the above three kinds of pulse encoder, photoelectric used most widely, on the x axis and z axis end each equipped with a light encoder, its main use in the detection of digital, angular displacement, angular displacement based on the screw pitch to indirectly reflect the rest of linear displacement. 3) Rotating transformer has some applications of rotating transformer is the induction motor, the rotating transformer, its amount of angular displacement and the output voltage is a continuous function relationship. Constitute the rotor and stator rotating transformer, in detail, the rotating transformer consists of two rotor winding, the stator winding of one core and two, respectively placed on the stator and rotor of rotating transformer winding and primary winding, the original electromagnetic coupling between the winding and the auxiliary winding and the rotor's rotating transformer corner there is a certain relationship.
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