When talking aerospace sensors, ‘analogue’ or ‘digital’ become hardly necessary, being simply a matter of method of operation, and that it is the underlying physical principles which are all-important.
Classification of sensors – In discussing Torque Transducer one must decide whether to classify them in accordance with the physical property they utilize (like piezoelectric, photovoltaic, etc.) or based on the function they perform (including measurement of length, temperature, etc.). Inside the former case one can present a reasonably integrated view of the sensing process, yet it is just a little disconcerting when one would like to compare the merits of, say, two types of temperature sensors, if one must look over separate sections on resistive, thermoelectric and semiconductor devices to help make the comparison.
Alternatively, to attempt to differentiate devices by function often is usually an extremely boring catalogue of numerous unrelated devices. The important thing on them is signals are transformed from a single form to another. It is also easy to discuss sensors from the functional viewpoint, under headings such as length, temperature, etc., ideal for somebody who actually desires to select or utilize a sensor for the application as opposed to just read across the subject.
The phrase ‘sensors’ and ‘transducers’ are both commonly used inside the description of measurement systems. The previous is popular in the united states whereas the second is more often utilized in Europe. Deciding on a words in science is rather important. Lately we have seen a propensity to coin new words or even to misuse (or misspell) existing words, and this may lead to considerable ambiguity and misunderstanding, and is likely to diminish the preciseness of the language. The matter has become very apparent in the computer and microprocessor areas, where preciseness is particularly important, and can seriously confuse persons entering the topic.
The term ‘sensor’ hails from sentire, meaning ‘to perceive’ and Micro Load Cell is from transducere meaning ‘to lead across’. A dictionary definition Chambers Twentieth Century) of ‘sensor’ is ‘a device that detects a change in a physical stimulus and turns it in to a signal which can be measured or recorded’; a corresponding definition of ‘transducer’ is ‘a device that transfers power from one system to a different inside the same or perhaps in different form’.
An intelligent distinction is by using ‘sensor’ for that sensing element itself, and ‘transducer’ for your sensing element plus any associated circuitry. For example, thermistors are sensors, because they respond to a stimulus (changes its resistance with temperature), only become transducers when connected in a bridge circuit to transform improvement in resistance to improvement in voltage, considering that the complete circuit then transduces from the thermal for the electrical domain. A solar cell is both a sensor as well as a transducer, because it responds to a stimulus (produces a current or voltage responding to radiation) and in addition transducer from your radiant to the electrical domain. It does not require any associated circuitry, though in practice an amplifier would usually be used. All transducers thus contain a sensor, and several (though its not all) sensors are also transducers.
The distinction is pretty small, and once one actually uses a sensor (by using capacity to it) it will become Triaxial Load Cell. An appealing classification of devices can be accomplished by considering the oygoqj kinds of energy or signal transfer.
The term ‘actuate’ means ‘to put in, or incite to, action’ and actuators are devices that produce the display or observable output in a measurement system like a light-emitting diode (LED) or moving coil meter. These are obviously transducers utilized for output purposes, since they transduce from one domain to another (ie. electrical to radiant for LEDs).