Apresentação realizada na disciplina de Tópicos Especiais 1 sobre energias (no caso, o grupo ficou com a responsabilidade de apresentação em 20 minutos sobre Energia Elétrica).
Apresentação realizada na disciplina de Tópicos Especiais 1 sobre energias (no caso, o grupo ficou com a responsabilidade de apresentação em 20 minutos sobre Energia Elétrica).
The transducer whose resistance varies because of the environmental effects such type of transducer is known as the resistive transducer. The change in resistance is measured by the ac or dc measuring devices. The resistive transducer is used for measuring the physical quantities like temperature, displacement, vibration etc.
The measurement of the physical quantity is quite difficult. The resistive transducer converts the physical quantities into variable resistance which is easily measured by the meters. The process of variation in resistance is widely used in the industrial applications.
The resistive transducer can work both as the primary as well as the secondary transducer. The primary transducer changes the physical quantities into a mechanical signal, and secondary transducer directly transforms it into an electrical signal.
Working Principle of Resistive Transducer
The resistive transducer element works on the principle that the resistance of the element is directly proportional to the length of the conductor and inversely proportional to the area of the conductor. equation-1
Where R – resistance in ohms.
A – cross-section area of the conductor in meter square.
L – Length of the conductor in meter square.
ρ – the resistivity of the conductor in materials in ohm meter.
The resistive transducer is designed by considering the variation of the length, area and resistivity of the metal.
Applications of Resistive Transducer
The following are the applications of the resistive transducer.
Potentiometer – The translation and rotatory potentiometer are the examples of the resistive transducers. The resistance of their conductor varies with the variation in their lengths which is used for the measurement of displacement.
Strain gauges – The resistance of their semiconductor material changes when the strain occurs on it. This property of metals is used for the measurement of the pressure, force-displacement etc.
Resistance Thermometer – The resistance of the metals changes because of changes in temperature. This property of conductor is used for measuring the temperature.
Thermistor – It works on the principle that the temperature coefficient of the thermistor material varies with the temperature. The thermistor has the negative temperature coefficient. The Negative temperature coefficient means the temperature is inversely proportional to resistance.
Now in day to day life we have seen that every thing is in digitilized form so this this presentation is ol about the evolution of meter into automatic meter with many technologies.
Its quiet intresting topic and very vast topic too.
The transducer whose resistance varies because of the environmental effects such type of transducer is known as the resistive transducer. The change in resistance is measured by the ac or dc measuring devices. The resistive transducer is used for measuring the physical quantities like temperature, displacement, vibration etc.
The measurement of the physical quantity is quite difficult. The resistive transducer converts the physical quantities into variable resistance which is easily measured by the meters. The process of variation in resistance is widely used in the industrial applications.
The resistive transducer can work both as the primary as well as the secondary transducer. The primary transducer changes the physical quantities into a mechanical signal, and secondary transducer directly transforms it into an electrical signal.
Working Principle of Resistive Transducer
The resistive transducer element works on the principle that the resistance of the element is directly proportional to the length of the conductor and inversely proportional to the area of the conductor. equation-1
Where R – resistance in ohms.
A – cross-section area of the conductor in meter square.
L – Length of the conductor in meter square.
ρ – the resistivity of the conductor in materials in ohm meter.
The resistive transducer is designed by considering the variation of the length, area and resistivity of the metal.
Applications of Resistive Transducer
The following are the applications of the resistive transducer.
Potentiometer – The translation and rotatory potentiometer are the examples of the resistive transducers. The resistance of their conductor varies with the variation in their lengths which is used for the measurement of displacement.
Strain gauges – The resistance of their semiconductor material changes when the strain occurs on it. This property of metals is used for the measurement of the pressure, force-displacement etc.
Resistance Thermometer – The resistance of the metals changes because of changes in temperature. This property of conductor is used for measuring the temperature.
Thermistor – It works on the principle that the temperature coefficient of the thermistor material varies with the temperature. The thermistor has the negative temperature coefficient. The Negative temperature coefficient means the temperature is inversely proportional to resistance.
Now in day to day life we have seen that every thing is in digitilized form so this this presentation is ol about the evolution of meter into automatic meter with many technologies.
Its quiet intresting topic and very vast topic too.
concepts d'energia, treball i potencia. sistemes conservatius, energies potencials i cinètica , teoremes de treball i energia.
problenes amb solucions.
16. Si només hi actuen forces conservatives, com el pes del cos, l’energia mecànica no varia, d’acord amb el principi de la conservació de l’energia.
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18. 20/09/2009 Unitat 0. Comencem 14 ENERGIA MECÀNICA, CINÈTICA I POTENCIAL TRANSFORMACIÓ DE L’Ep EN Ec
19. 20/09/2009 Unitat 0. Comencem 15 ENERGIA MECÀNICA, CINÈTICA I POTENCIAL TRANSFORMACIÓ DE L’Ep EN Ec
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23. Si T d’un cos velocitat i separació de les seves molècules el cos s’escalfa i es dilata.
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25. 20/09/2009 Unitat 0. Comencem 20 MANIFESTACIONS ENERGÈTIQUES ENERGIA TÈRMICA I ENERGIA INTERNA Conducció Pròpia dels sòlids. Es dóna per contacte directe entre cossos a temperatures diferents. La calor sempre va del cos calent al fred fins que s’igualen les temperatures.
26. 20/09/2009 Unitat 0. Comencem 21 MANIFESTACIONS ENERGÈTIQUES ENERGIA TÈRMICA I ENERGIA INTERNA Convecció Pròpia dels fluids (tant líquids com gasos). La part calenta del fluid té menys densitat i passa a la zona més alta; el fluid més fred queda a la part més baixa. Aquesta circulació s’anomena corrent de convecció.
27. 20/09/2009 Unitat 0. Comencem 22 MANIFESTACIONS ENERGÈTIQUES ENERGIA TÈRMICA I ENERGIA INTERNA Radiació Es produeix en els cossos en forma d’ones electromagnètiques, que travessen els medis que els són transparents, com l’aire, sense gairebé escalfar-los, però quan incideixen sobre cossos que els són opacs, com el nostre cos, les parets d’una habitació, els transfereixen l’energia que transporten i n’augmenten la T. L’emissió és més important com més alta és la T del cos.
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30. Qualsevol modificació del nucli, ja sigui per reaccions de fissió o de fusió, comporta la transferència d’enormes quantitats d’energia en forma d’energia radiant, tèrmica i cinètica de les partícules que es desprenen com a conseqüència d’una pèrdua de massa.
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35. També podem considerar les energies transferides per unitat de temps, que és més habitual a les màquines, i parlar de potència d’entrada o consumida (Pc), potència de sortida o útil (Pu) i potència perduda (Pp).
![20/09/2009 Unitat 0. Comencem 2 ENERGIA, TREBALL I POTÈNCIA ENERGIA ,[object Object]](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)