Describe the operation of the magnetoresistive (MR) sensor.
What will be an ideal response?
Magnetoresistive (MR) sensors consist of the magnetoresistive sensor element, apermanent magnet, and an integrated signal conditioning circuit to make use of themagnetoresistive effect.MR sensors cannot generate a signal voltage on their own and must have an external power source. The magnetoresistive bridge changes resistance due to the relationship of the tone wheel and magnetic field surrounding the sensor. The change in resistance is due to the spin dependence of electron scattering.The integrated circuit (IC) in the sensor is powered by a 12-volt circuit that is provided by the computer. The IC supplies a constant 7 mA power to the computer. The relationship of the tooth on the tone wheel to the permanent magnet in the sensor signals the IC to enable a second 7-mA power supply. The output of the sensor, sent to the computer, is a DC voltage signal with changing voltage and current levels. When a valley of the tone wheel is aligned with the sensor, the voltage signal is approximately 0.8 volt and a constant 7 mA current is sent to the computer. As the tone wheel rotates, the tooth shifts the magnetic field and the IC enables a second 7-mA current source. The computer senses a voltage signal of approximately 1.6 volts and 14 mA. The computer measures the amperage of the digital signal and interrupts the signal ascomponent speed.
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Which of the following genetic types are most common in commercial swine production?
A. Crossbreds B. Purebreds
When driving out rusted bolts, technician A places the round end of a ball peen hammer over the bowl and then hits the fly end of the ball peen hammer with a sledgehammer. Technician B uses of Phillips tip screwdriver and a ball peen hammer to drive out small rusted bullets. Who is correct?
What will be an ideal response?