Computer interface data aquisition presentation.pptx

Data acquisition (DAQ) is the sampling of the real world to generate data that can be manipulated by a computer. In order to take measurements with computer-based DAQ hardware, temperature transmitter, signal conditioning equipment and software such as MATLAB or LabView is needed
In 1830 Michael Faraday (British) and Joseph Henry (American) independently discovered that a changing magnetic field produced a current in a coil of wire. Faraday, who was perhaps the greatest experimentalist of all time, came up with the idea of electric and magnetic “fields.” He also invented the dynamo (a generator), made major contributions to chemistry, and invented one of the first electric motors
In the 19th century James Clerk Maxwell, a Scottish physicist and one of the great theoreticians of all times, mathematically unified the electric and magnetic forces. He also proposed that light was electromagnetic radiation.
In the late 19th century Pierre Curie discovered that magnets loose their magnetism above a certain temperature that later became known as the Curie point.
In the 1900's scientists discover superconductivity. Superconductors are materials that have a zero resistance to a current flowing through them when they are a very low temperature. They also exclude magnetic field lines (the Meissner effect) which makes magnetic levitation possible.

Every magnet is a magnetic dipole. A bar magnet is a simple example. E field due an electric dipole is just like the magnetic field (B field) of a bar magnet. Field lines emanate from the + or N pole and reenter the - or S pole. Although they look the same, they are different kinds of fields. E fields affect any charge in the vicinity, but a B field only affects moving charges. As with charges, opposite poles attract and like poles repel. magnetic monopole do not exist, meaning it is impossible to isolate a N or S pole When we try to separate the two poles by breaking the magnet, we only succeed in producing two distinct dipoles.
Regardless of symmetry or complexity, the SI unit for any E field is the N/C, since by definition an electric field is force per unit charge. Because there are no magnetic monopoles, there is no analogous definition for B. However, regardless of symmetry or complexity, there is only one SI unit for a B field. It is called a tesla and its symbol is T

Current along with a magnetic field can produce torque. This is the basic idea behind an electric motor. Above is a wire loop (purple) carrying a current provided by some power source like a battery. The current loop is submerged in an external field. From F = I L  B, the force vectors in black are perpendicular to their wire segments. The net force on the loop is zero, but the net torque about the center is nonzero. The forces on the left and right wires produce no torque since the moment arm is zero for each (they point right at the center). However, the force F on the top wire (in the background) has a moment arm d, so it p

1. Computer Interface for Data Aquisition Data acquisition (DAQ) is the sampling of the real world to generate data that can be manipulated by a computer. In order to take measurements with computer-based DAQ hardware, temperature transmitter, signal conditioning equipment and software such as MATLAB or LabView is needed PCI-1710 Series are multifunction cards for the PCI bus. 16 single-ended or 8 differential or a combination of analog inputs 12-bit A/D converter, with up to 100 kHz sampling rate Programmable gain Automatic channel/gain scanning Onboard FIFO memory (4096 samples) Two 12-bit analog output channels (PCI-1710/1710HG only) 16 digital inputs and 16 digital outputs Onboard programmable counter BoardID ™ switch

2. DIGITAL THERMOMETER 7563