vb.net barcode reader code Courtesy in Software

Generator QR in Software Courtesy

1 Courtesy
QR Code JIS X 0510 Recognizer In None
Using Barcode Control SDK for Software Control to generate, create, read, scan barcode image in Software applications.
QR-Code Creation In None
Using Barcode creator for Software Control to generate, create QR image in Software applications.
FOCUS ON MEASUREMENTS
Denso QR Bar Code Reader In None
Using Barcode recognizer for Software Control to read, scan read, scan image in Software applications.
QR Code JIS X 0510 Generator In C#.NET
Using Barcode drawer for VS .NET Control to generate, create QR Code image in VS .NET applications.
Ohio Semitronics, Inc, Columbus, Ohio
Generating Denso QR Bar Code In VS .NET
Using Barcode maker for ASP.NET Control to generate, create QR Code image in ASP.NET applications.
QR Code JIS X 0510 Generator In .NET Framework
Using Barcode generation for Visual Studio .NET Control to generate, create QR-Code image in VS .NET applications.
7
Print QR Code ISO/IEC18004 In VB.NET
Using Barcode maker for VS .NET Control to generate, create QR image in .NET applications.
Printing Code 3 Of 9 In None
Using Barcode drawer for Software Control to generate, create ANSI/AIM Code 39 image in Software applications.
AC Power
Encode Bar Code In None
Using Barcode generator for Software Control to generate, create bar code image in Software applications.
Make Code 128 Code Set B In None
Using Barcode maker for Software Control to generate, create Code 128 Code Set A image in Software applications.
+++ Hz Hall field
ECC200 Maker In None
Using Barcode generator for Software Control to generate, create Data Matrix ECC200 image in Software applications.
Making GS1 - 13 In None
Using Barcode creator for Software Control to generate, create European Article Number 13 image in Software applications.
c eti gn Ma ield f Electric current
UPC - E1 Creation In None
Using Barcode generator for Software Control to generate, create UCC - 12 image in Software applications.
ANSI/AIM Code 128 Creator In None
Using Barcode drawer for Office Word Control to generate, create Code 128 image in Word applications.
InAs Hall element Conducting pattern Jx Substrate
EAN / UCC - 14 Drawer In Objective-C
Using Barcode creation for iPad Control to generate, create GS1-128 image in iPad applications.
Making UPC Symbol In Java
Using Barcode drawer for Android Control to generate, create UPC-A Supplement 5 image in Android applications.
Figure 727 Hall effect Figure 728 Hall-effect probe
Barcode Creation In None
Using Barcode printer for Word Control to generate, create barcode image in Office Word applications.
Encode EAN / UCC - 13 In Java
Using Barcode printer for Android Control to generate, create EAN13 image in Android applications.
by an ultrasonic cutter into small, rectangular chips These chips of indium arsenide are then placed on a thin ceramic substrate and soldered to a conducting pattern on the substrate, as shown in Figure 728 Once made, the Hall probe is normally coated with epoxy to protect the semiconductor compound and other components To use the probe, an electric current is passed through the length of the InAs chip, as shown in Figure 729 Note that the contact areas for passing current through the Hall element are made larger than the ones for detecting the Hall voltage Typically, current on the order of 10 1 A is passed through the Hall element This is known as the control current Care must be taken when using a Hall probe never to put the control current through the output Because the solder contacts for the voltage sensing are very small, the control current can melt these solder joints This may destroy or damage the Hall probe
Barcode Generator In None
Using Barcode encoder for Font Control to generate, create bar code image in Font applications.
Making Barcode In Java
Using Barcode printer for Android Control to generate, create bar code image in Android applications.
Note small contact for voltage sensing
Current Source
Volt meter i
Hall probe
Figure 729 Hall-effect probe circuit
A wire carrying a current will have a closed magnetic eld around it, as depicted in Figures 730 and 731 If a Hall probe is placed perpendicular to the magnetic ux lines around a current-carrying conductor, then the Hall probe will have a voltage output proportional to that magnetic eld and the control current through the Hall probe Since the magnetic eld is directly proportional to the current, I , the output of the Hall probe is directly
Part I
Circuits
Magnetic field around a current-carrying cable Flux line N I
Compass Current out of page
Right hand rule: thumb indicates current; fingers the flux lines
Figure 731 Right-hand rule
proportional to the current, I , and to the control current We have a current transducer Unfortunately, this method will provide adequate output only if the current being measured, I , is of the order of 104 amperes Also, the strength of the magnetic eld is proportional to the inverse of the distance from the center of the conductor A practical current transducer (Figure 732) can be made by using a magnetic eld concentrator with a Hall probe placed in a gap Typically, a laminated iron core with very low magnetic retention is utilized This arrangement makes a simple but very effective current transducer Unfortunately, a Hall probe is temperature-sensitive Hence, the voltage output of the current transducer as described will be dependent upon the
Concentrator I
Hall probe placed in gap IC Current source
Voltmeter
7
AC Power
control current, IC , the current through the window, I , and the temperature, T To correct for this, a thermistor resistor network is used to maintain temperature in uence to a minimum for the operating range of the transducer By careful selection of the thermistor and resistor used, temperature in uence in the range of 40 C to +65 C can be mostly eliminated
The measurement and correction of the power factor for the load are an extremely important aspect of any engineering application in industry that requires the use of substantial quantities of electric power In particular, industrial plants, construction sites, heavy machinery, and other heavy users of electric power must be aware of the power factor their loads present to the electric utility company As was already observed, a low power factor results in greater current draw from the electric utility, and in greater line losses Thus, computations related to the power factor of complex loads are of great practical utility to any practicing engineer To provide you with deeper insight into calculations related to power factor, a few more advanced examples are given in the remainder of the section
FOCUS ON MEASUREMENTS
Power Factor
A capacitor is being used to correct the power factor to unity The circuit is shown in Figure 733 The capacitor value is varied, and measurements of the total current are taken Explain how it is possible to zero in on the capacitance value necessary to bring the power factor to unity just by monitoring the current IS
Copyright © OnBarcode.com . All rights reserved.