14 Questions
What is the primary function of a sensor?
To convert physical quantities into electrical signals
What is the purpose of measurement?
To obtain information regarding physical values
What is a transducer?
A device that converts one form of energy into another
What is the purpose of instrumentation?
To put numerical values to physical quantities
What type of instrument is a temperature sensor?
Electronic
What is an example of a mechanical instrument?
Strain gauge
What is the main difference between a sensor and an actuator?
Sensor converts physical quantity into an electrical signal, while actuator converts electrical energy into mechanical energy
Which of the following is NOT a reason why we need measurement?
To reduce the cost of production
What is the main advantage of using electronic transducers?
They have input or output that is electrical in nature
Which type of instrument is a capacitance sensor?
Electrical
What is the purpose of a physical quantity?
To measure the physical values of a variable
Which of the following is an example of an indirect method of measurement?
Measuring the displacement of an object using a strain gauge
What is the main difference between a parameter and a physical quantity?
A parameter is a physical quantity within defined limits
What is the main advantage of using instrumentation in measurement systems?
It generates data suitable for analysis in electrical format
Study Notes
Measurement and Instrumentation
- Measurement: a method to obtain information about physical values of variables.
- Instrumentation: devices used in measurement systems.
Physical Quantities and Parameters
- Physical quantity: variables such as pressure, temperature, mass, and length.
- Parameter: a physical quantity within defined numeric limits.
Transducers, Sensors, and Actuators
- Transducer: a device that converts one form of energy to another.
- Electronic transducer: has input or output that is electrical in nature (voltage, current, or resistance).
- Sensor: an electronic transducer that converts physical quantities into electrical signals.
- Actuator: an electronic transducer that converts electrical energy into mechanical energy.
Importance of Measurement
- Improves the quality of the product.
- Improves the efficiency of production.
- Maintains proper operation.
Importance of Instrumentation
- Puts numerical values to physical quantities.
- Generates data suitable for analysis, mostly in electrical format.
Types of Measurement
- Direct method.
- Indirect method.
Types of Instruments
Mechanical Instruments
- Force sensors.
- Pressure sensors.
- Strain gauges.
- Displacement sensors.
- Velocity sensors.
Electrical Instruments
- Current sensors.
- Voltage sensors.
- Resistance sensors.
- Capacitance sensors.
Electronic Instruments
- Temperature sensors.
- Pressure sensors.
- Force sensors.
- Accelerometers.
Measurement and Instrumentation
- Measurement: a method to obtain information about physical values of variables.
- Instrumentation: devices used in measurement systems.
Physical Quantities and Parameters
- Physical quantity: variables such as pressure, temperature, mass, and length.
- Parameter: a physical quantity within defined numeric limits.
Transducers, Sensors, and Actuators
- Transducer: a device that converts one form of energy to another.
- Electronic transducer: has input or output that is electrical in nature (voltage, current, or resistance).
- Sensor: an electronic transducer that converts physical quantities into electrical signals.
- Actuator: an electronic transducer that converts electrical energy into mechanical energy.
Importance of Measurement
- Improves the quality of the product.
- Improves the efficiency of production.
- Maintains proper operation.
Importance of Instrumentation
- Puts numerical values to physical quantities.
- Generates data suitable for analysis, mostly in electrical format.
Types of Measurement
- Direct method.
- Indirect method.
Types of Instruments
Mechanical Instruments
- Force sensors.
- Pressure sensors.
- Strain gauges.
- Displacement sensors.
- Velocity sensors.
Electrical Instruments
- Current sensors.
- Voltage sensors.
- Resistance sensors.
- Capacitance sensors.
Electronic Instruments
- Temperature sensors.
- Pressure sensors.
- Force sensors.
- Accelerometers.
Test your understanding of measurement and instrumentation concepts, including physical quantities, parameters, transducers, and sensors.
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