将一种物理量转变为另一种物理量的器件统称为转换器(converter).转换器可分为两类,一类仅仅是能量的转换,目的是使用其能量,如扬声器(电转换成声)、太阳能电池(光转换成电)、灯泡(电转换成光)等,这类转换器,一般不能称作传感器(transducer或?sor).另一类,它对能量的转换并不重视,主要是将一种物理量的信息转换成另一种物理量信息,目的 Devices that convert one physical quantity to another are collectively referred to as converters. Converters fall into two categories, one that is merely a conversion of energy in order to use its energy, such as a speaker (electrically converted to sound) , Solar cells (light to electricity), light bulbs (electricity to light), etc. These types of transducers are generally not known as transducers or transducers, and the other is that they neglect the conversion of energy, Is a physical amount of information into another physical amount of information, the purpose