有源换能器和无源换能器的区别

1.有源传感器：
它是一种不需要任何外部电源来产生输出的换能器设备，其函数是通过自身的能力将物理信号转换为电能信号。有源传感器不再需要任何其他电源来将信号从一种形式转换为另一种形式。热电偶是有源传感器的一个例子。有源传感器产生电压和电力信号形式的输出。

2. 无源换能器：
它是外部供电的换能器，是一种不再能够通过自身将物理信号转换为电力信号的小工具，它通过任何其他能源转换信号，即在与任何被动接触时产生变化元素。应变计、电容式传感器、热敏电阻是无源传感器的例子。它的输出形式依赖于被动关联的变体。

有源换能器和无源换能器的区别：

S.No.	Active Transducer	Passive Transducer
1.	It is kind of transducer which generates output in form of voltage or current, without any exterior power supply.	It is kind of transducer whose interior parameters including capacitance, resistance and inductance modifies or changes when it comes in contact with any passive element.
2.	Its working principle includes drawing energy from measured source.	Its working principle includes drawing power from external source which results in a change in its physical properties.
3.	It has its own power supply for its functioning.	For its functioning, it requires an external power supply.
4.	It has a much simpler design, unlike Passive Transducer.	It has a design that is complex as compared to an Active Transducer.
5.	Smallest change in pressure that it can be detected in its output is very low, i.e it has a low resolution.	It can detect small changes in output easily and more accurately, i.e. it has a high resolution.
6.	The output of active transducers depends on signal which is used for measurement.	The output of passive transducers depends on signal from external power supply.
7.	These kinds of transducers are also known as self-generating transducers as they do not need any external power source.	These are also known as externally powered transducers as they need an external power supply to perform tasks.