将传感器技术关联到应用程序：技术有：InductiveOpticalContact switchCapacitive or ultrasound应用技术有：Position of a cartDetection of a coinDetecting the level of liquid in a reservoirperon crossing a door告诉我答案并且分析为什么

Inductive technology can be used to detect the position of a cart, as it is capable of detecting metallic objects. Optical technology can be used to detect a coin, as it can detect the presence or absence of light reflecting off the coin's surface. Contact switch technology can be used to detect a person crossing a door, as it can detect physical contact. Capacitive or ultrasound technology can be used to detect the level of liquid in a reservoir, as they are capable of measuring changes in electrical capacitance or sound waves when liquid is present.

Each technology is suited to a particular application based on its capabilities and limitations. For example, inductive technology is not suitable for detecting non-metallic objects, while optical technology may not be suitable for detecting objects in low light conditions. It is important to choose the appropriate technology based on the requirements of the application