Taller unidades 3 y 4

TALLER UNIDAD III

Electronic Technology Research Techniques, Materials, Devices

Electronic Technology refers to a theoretical branch of Physics that study the flow of charges in several materials such as resistors, diodes, semi-conductors, capacitors and inductors. These electronic components are usually combined in a specific way to form an electronic circuit which is usually found on all electronic equipment such as television, computers, stereo amplifiers and even mobile phones. There are three types of circuits that include analog, digital and mixed signal circuits. Analog circuits are usually found on radio receivers while a digital circuit is commonly found on computers and electronic clocks. A mixed signal circuit is a combination of both analog and digital circuits and are usually found on digital to analog or analog to digital converters. 

Application for electronic technology is not only limited to home appliances. It has a wide range of application that could include hospital, construction, navigation and life saving equipments. Electronic technology is one reason why our society has progressed so much. From the invention of the triode in 1908 up today with the invention of several digital equipments, electronic technology has helped mankind to improve on the way they live.

Advancement on electronic technology is on a rapid pace. Based on a recent update from Pcworld.idg.com.au, GE was able to develop diodes from carbon Nanotubes, about 10,000 times thinner than the human hair, is expected to replace conventional silicon in the future. Possible application of such development would include optoelectronic devices (uses light to transmit information) and sensors which can be used for chemical detection and home monitoring.

·         ¿Cuál cree usted que es el tópico que está a punto de leer?

     Tecnología electrónica.

·         ¿Cuál es la idea general del texto?

     Definición de tecnología electrónica, aplicaciones y avances.

·         ¿Que palabras se repiten?

     Electronic, technology, circuit, usually, computers, signal, analog, digital, application, invention.

·         ¿Que palabras se parecen al español?

     Electronic, technology, circuit, analog, digital, application, invention, resistors, diodes, semi-conductors, capacitors, inductors,  television, human, rapid, conventional.

·         ¿Cuales son las palabras en negrita, el titulo, subtitulo o gráficos que te ayudan a entender el texto?
    Electronic Technology Research Techniques, Materials, Devices.  

·         ¿De qué trata el texto?

     Trata sobre la definición de la tecnología electrónica, los tipos de circuitos electrónicos, la aplicación de la tecnología electrónica en nuestra sociedad y el futuro de la tecnología electronica.    

 TALLER UNIDAD IV

Programmable logic controller

    A programmable logic controller (PLC) or programmable controller is a digital computer used for automation of electromechanical processes, such as control of machinery on factory assembly lines, amusement rides, or lighting fixtures. PLCs are used in many industries and machines. The PLC is designed for multiple inputs and output arrangements, extended temperature ranges, immunity to electrical noise, and resistance to vibration and impact. The control programs of the machines are typically stored in a non-volatile memory. A PLC is an example of a real time system since output results must be produced in response to input conditions within a bounded time.  

LA DEFINICION

    Un Controlador Logico Programable (PLC) es un equipo digital, usado para la automatización de procesos electromecanicos. Los PLC son usados en muchas industrias y máquinas. El PLC esta diseñado para multiples arreglos de entradas y salidas, rangos de temperaturas extendidos, inmune al ruido eléctrico y resistente al impacto y vibración. Los programas de control de las maquinas son generalmente almacenados en una memoria no volatil. Un PLC es un ejemplo de un sistema de tiempo real donde los resultados de salida deben producirse in respuesta a las condiciones de entrada dentro de un tiempo limitado.  

MARCADORES DE DEFINICION

•      Is a.
•      Used for.
•      Is designed.
•      Are.
•      Is an

Programmable logic controller history

 

    The PLC was invented in response to the needs of the American automotive manufacturing industry. Programmable logic controllers were initially adopted by the automotive industry where software revision replaced the re-wiring of hard-wired control panels when production models changed.

    Before the PLC, control, sequencing, and safety interlock logic for manufacturing automobiles was accomplished using hundreds or thousands of relays, cam timers, and drum sequencers and dedicated closed-loop controllers. The process for updating such facilities for the yearly model change-over was very time consuming and expensive, as electricians needed to individually rewire each and every relay.

    In 1968 GM Hydramatic (the automatic transmission division of General Motors) issued a request for proposal for an electronic replacement for hard-wired relay systems. The winning proposal came from Bedford Associates of Bedford, Massachusetts. The first PLC, designated the 084 because it was Bedford Associates' eighty-fourth project, was the result. Bedford Associates started a new company dedicated to developing, manufacturing, selling, and servicing this new product: Modicon, which stood for MOdular DIgital CONtroller. One of the people who worked on that project was Dick Morley, who is considered to be the "father" of the PLC. The Modicon brand was sold in 1977 to Gould Electronics, and later acquired by German Company AEG and then by French Schneider Electric, the current owner.

    One of the very first 084 models built is now on display at Modicon's headquarters in North Andover, Massachusetts. It was presented to Modicon by GM, when the unit was retired after nearly twenty years of uninterrupted service. Modicon used the 84 moniker at the end of its product range until the 984 made its appearance.

MARCADORES DE TIEMPO

•      Initially.
•      Before.
•      In 1968.
•      In 1977.
•      After. 

IDEA GENERAL DEL TEXTO

    Historia del Controlador Logico Programable desde sus primeros usos en la industria automotriz.