主动换能器与被动换能器之间的区别

1.有源传感器：
这是不要求任何外部电源用于产生输出并处于一个函数由自身的能力的手段物理信号转换为电动换能器的信号的设备的类型。有源传感器不再需要任何其他电源即可将信号从一种形式转换为某种不同形式。热电偶是有源换能器的实例。有源换能器生成电压和电信号形式的输出。

2.无源传感器：
它是外部供电的换能器，是一种小工具，不再能够通过自身将物理信号转换为电力信号，而是通过任何其他能源转换信号，即，当与任何无源接触时会产生变化元素。应变仪，电容式传感器，热敏电阻是无源传感器的示例。它的输出形式依赖于被动关联中的变量。

有源传感器和无源传感器之间的区别：

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.