on video The Inductive and Capacitive Sensor | Different types and applications

 

The Inductive and Capacitive Sensor | Different types and applications

In order to automatically control a manufacturing process, it is necessary to have information about the state of the process. This can be done by measuring different physical quantities involved in it. Despite being able to receive different names (detector, transducer, probe), the sensor is the most used name in automata control to refer to the device that measures a physical quantity. In general, these physical magnitudes do not have to be electrical, so transducers are used to convert them to electrical signals (Fig. 2.2.
A transducer converts a non-electrical signal into an electrical one, in which some of its parameters (voltage level, current, frequency) contain information about the measured magnitude. Since it is necessary to couple the output of this transducer device to the control system, it may be necessary to perform filtering and amplification of the electrical signal in the so-called conditioning or conditioning circuit.Below are some characteristics that define the behavior of the sensors. In the following definitions, the variable X is used to refer to the physical object to be measured (for example, the temperature at which a room is located), and the variable Y to refer to the measurement made by the sensor (the temperature measured by the thermal sensor used).

Depending on the operating regime of the sensor, we distinguish two sets of characteristics: static (when there is a permanent regime in the variable to be measured or it varies slowly) and dynamic (relative to a transient regime of the variable to be measured).

 

The Inductive and Capacitive Sensor | Different types and applications

In order to automatically control a manufacturing process, it is necessary to have information about the state of the process. This can be done by measuring different physical quantities involved in it. Despite being able to receive different names (detector, transducer, probe), the sensor is the most used name in automata control to refer to the device that measures a physical quantity. In general, these physical magnitudes do not have to be electrical, so transducers are used to convert them to electrical signals (Fig. 2.2.
A transducer converts a non-electrical signal into an electrical one, in which some of its parameters (voltage level, current, frequency) contain information about the measured magnitude. Since it is necessary to couple the output of this transducer device to the control system, it may be necessary to perform filtering and amplification of the electrical signal in the so-called conditioning or conditioning circuit.Below are some characteristics that define the behavior of the sensors. In the following definitions, the variable X is used to refer to the physical object to be measured (for example, the temperature at which a room is located), and the variable Y to refer to the measurement made by the sensor (the temperature measured by the thermal sensor used).

Depending on the operating regime of the sensor, we distinguish two sets of characteristics: static (when there is a permanent regime in the variable to be measured or it varies slowly) and dynamic (relative to a transient regime of the variable to be measured).