Snmek 1

Anglicky v odbornch pedmtech"Support of teaching technical subjects in EnglishTutorial: Mechanic - electrician

Topic: Electric measurementthe 2nd. yearMeasuring of non - electrical quantities 2 sensorsPrepared by: Ing. Ji Smlek

Projekt Anglicky v odbornch pedmtech, CZ.1.07/1.3.09/04.0002je spolufinancovn Evropskm socilnm fondem a sttnm rozpotem esk republiky.

Distribution of sensors according to the used physical phenomenon or principle of scanning:

Measuring non-electric quantities mechanical quantities - position, track, speed, revolutions, force, torque, thermal variables - temperature, heat flux, heat radiological variables - intensity of visible, infrared and ultraviolet radiation quantity of hydraulic systems - pressure, flow, revolutions, noise biological variables - blood pressure, pulse, temperature .. nuclear variables - type of radiation , ,

Slovnk:mechanickch veliin polohadrharychlostotkyslamoment,tepelnch veliinteplota, tepeln tok, teploradianch veliin intenzita viditelnho, infraervenho a ultrafialovho zen,veliiny hydraulickch systm tlaky, prtoky, otky, hlunostbiologickch veliin krevn tlak, tep, teplota..jadernch veliin druhy zen , ,

Frazeologie:

2Measurement of movement in the room:Measuring non-electric quatitiesMotion sensor (pyroelectric sensor)The measured physical quantity: - an infrared beamApplication: - capture the movement of people in rooms, in buildings or triggers an alarm.

Functions - pyroelectric sensor responds to the thermal radiation emitted by the human body. To increase the sensitivity of the sensor it is placed in the focus of a parabolic reflector, or converging lens. The sensor signal is amplified, evaluates and responds to human movement, the sensor sends a signal. The actuator adopts an activation signal and switches for example for a certain period lighting or triggering an alarm.

Slovnk:

Frazeologie:zachycen pohybu osob v mstnostech

3Measurement of thermal quantities:Measuring non-electric quantitiesFunctions - in the weld two metal conductors with different concentrations of free electrons resulting from the change in temperature (the temperature of loose ends), for example when heated, the power supply, that can be measured between the free ends of conductors.ThermocoupleThe measured physical quantity - the temperature T ( C),Applications: - measure surface temperature of solids,

Slovnk:

Frazeologie:men povrchov teploty tles

4Measurement of thermal quantities:Measuring non-electric quantitiesProperties:A pair of metal (alloy):Fe (+) CuNi (-) is used for temperature measurement 200C to 700 C,NiCr (+), Ni (-) for 200C to 1200 C,NiCrSI (+) NiSi (-) to 1300 CPtRh (+), Pt (-) to 1600 CThermocoupleThe measured physical quantity - the temperature T ( C) Application: - measurement of the surface temperature of solids,

Slovnk:

Frazeologie:

men povrchov teploty tles

5Measurement of thermal quantities:Measurement of non-electric quantitiesFunctions - A thermistor is a semiconductor component that is used as a temperature-sensitive component. Types : NTC and PTC thermistor. NTC is a thermistor with negative temperature coefficient, which means that heating resistance components decreases resistanceThe PTC thermistor resistance increases with heatingThermistor:The measured physical quantity - the temperature T ( C)Application: - measurement of temperature of oil, water, indirect measurement of liquid flow rate, liquid level indicator - monitoring overflow tank with heating oil, thermometer for microwave ovens ....

Slovnk:

Frazeologie:men teploty oleje, vody, nepm men rychlosti proudn kapalin, indikace hladiny kapaliny - hldn peplnn ndr s topnou naftou, teplomr pro mikrovlnn trouby

6Measurement of thermal quantities:Measurement of non-electric quatitiesResistive thermal sensor:The measured physical quantity - the temperature T ( C)Functions: - They use the principle of change in resistance when the temperature changes, based on the formula:

R2 - resistance at higher temperature ()R0 - resistance at reference temperature () - temperature difference (C) - temperature coefficient of resistance (in tables) (K-1)for aluminum Al is = 0,004 K-1 ;for copper Cu is = 0,0042 K-1

Slovnk:

Frazeologie:Vyuvaj principu zmny odporu pi zmn teploty, kter vychz ze vztahu:

7Name the distribution of sensors by sensing the type of variablemechanical quantities -thermal quantities -radiation quantities -quantities of hydraulic systems -biological quantities - Describe the use of piezoelectric sensors Fill in the missing words Application: - capture the .people in ., in buildings or .alarm.Describe the use of a thermocouple Fill in the missing words Application: - ..surface .. of solids,

Explain the difference between an NTC and PTC thermistor Fill in the missing words NTC is a thermistor with negative , which means, that resistance components ...................... ...................The PTC thermistor ............... .............. with heating

Activities for students questions

Slovnk:

Frazeologie:zachycen pohybu osob v mstnostech, v budovch nebo spust alarm.

Rozdlen snma podle vyuvanho fyziklnho jevu nebo principu snmnmechanickch veliin - poloha, drha, rychlost, otky, sla, moment, tepelnch veliin - teplota, tepeln tok, teplo radianch veliin - intenzita viditelnho, infraervenho a ultrafialovho zen, veliiny hydraulickch systm - tlaky, prtoky, otky, hlunost biologickch veliin - krevn tlak, tep, teplota.. jadernch veliin - druhy zen a, b, g

8Name the quantities on which depends the resistance change with temperature fill in the missing words:R2 - ...........at higher...........()R0 - resistance at ........... temperature () - ........... ...........(C) - ........... ........... .... resistance (in ...........) (K-1)

Activities for students questions

Slovnk:

Frazeologie:9Muk, J. Management ve vzdlvn dosplch. Praha: EUROLEX BOHEMIA, 2000. ISBN 80-7361-269-7.Operan program Vzdlvn pro konkurenceschopnost, ESF 2007 2013.Dostupn na: http://www.msmt.cz/eu/provadeci-dokument-k-op-vzdelavani-pro-konkurenceschopnostUebnice Elektrick men Ing. Pavel Vylegala, SE Ostrava, 2006Uebnice Elektrick men SNTL, 1981Zklady Systmov techniky budov - Ing. Jan Vanu,

Bibliography