{"id":119,"date":"2018-03-25T08:39:29","date_gmt":"2018-03-25T08:39:29","guid":{"rendered":"http:\/\/tis-eg.com\/en\/?p=119"},"modified":"2018-03-25T08:39:29","modified_gmt":"2018-03-25T08:39:29","slug":"what-is-sensor","status":"publish","type":"post","link":"https:\/\/tis-eg.com\/en\/what-is-sensor\/","title":{"rendered":"what is Sensor ?"},"content":{"rendered":"

in the broadest definition, a\u00a0sensor<\/b>\u00a0is a device, module, or subsystem whose purpose is to detect events or changes in its environment and send the information to other electronics, frequently a\u00a0computer processor<\/a>. A sensor is always used with other electronics, whether as simple as a light or as complex as a computer.<\/p>\n

Sensors are used in everyday objects such as touch-sensitive elevator buttons (tactile sensor<\/a>) and lamps which dim or brighten by touching the base, besides innumerable applications of which most people are never aware. With advances in\u00a0micromachinery<\/a>\u00a0and easy-to-use\u00a0microcontroller<\/a>\u00a0platforms, the uses of sensors have expanded beyond the traditional fields of temperature, pressure or flow measurement,[1]<\/a><\/sup>\u00a0for example into\u00a0MARG sensors<\/a>. Moreover, analog sensors such as\u00a0potentiometers<\/a>\u00a0and\u00a0force-sensing resistors<\/a>\u00a0are still widely used. Applications include manufacturing and machinery, airplanes and aerospace, cars, medicine, robotics and many other aspects of our day-to-day life.<\/p>\n

A sensor’s sensitivity indicates how much the sensor’s output changes when the input quantity being measured changes. For instance, if the mercury in a thermometer moves 1\u00a0 cm when the temperature changes by 1\u00a0\u00b0C, the sensitivity is 1\u00a0cm\/\u00b0C (it is basically the slope Dy\/Dx assuming a linear characteristic). Some sensors can also affect what they measure; for instance, a room temperature thermometer inserted into a hot cup of liquid cools the liquid while the liquid heats the thermometer. Sensors are usually designed to have a small effect on what is measured; making the sensor smaller often improves this and may introduce other advantages.[2]<\/a><\/sup>\u00a0Technological progress allows more and more sensors to be manufactured on a\u00a0microscopic scale<\/a>\u00a0as microsensors using\u00a0MEMS<\/a>\u00a0technology. In most cases, a microsensor reaches a significantly higher speed and sensitivity compared with\u00a0macroscopic<\/a>\u00a0approaches.<\/p>\n

Classification of measurement errors<\/span><\/h2>\n
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An infrared sensor<\/p><\/div>\n<\/div>\n<\/div>\n

A good sensor obeys the following rules:<\/p>\n