Resources Contact Us Home
Method and apparatus for detection of edge position thickness or splice position of a material web

Image Number 5 for United States Patent #5583828.

A series of pulses of ultrasonic wave emitted from the transmitter with a specified period are received by the receiver. The received signals are rectified to a smooth wave with a single peak. The occurrence time of the peak is determined to gain and store the peak value, which corresponds to the edge position, thickness or splice position of the web. Alternatively, the transmitter emits a series of pulses of ultrasonic wave with a specified period and the peak value in the signals received by the receiver is once held in the peak-holding circuit. The peak voltage held is discharged and reduced with the discharge device and smoothing of the charged voltage yields its mean value, which corresponds to the edge position, thickness or splice position of the web.

  Recently Added Patents
System and method for collecting and using player information
Braking control system and method for vehicle
Ramping pass voltage to enhance channel boost in memory device
Image processing method and image processing apparatus
Torque wrench system having multiple torque stations
Fine grained Ni-based alloys for resistance to stress corrosion cracking and methods for their design
Exploiting conditions to optimize expensive database queries
  Randomly Featured Patents
Apparatus having positioning and mounting means for joining two parts and method of using same
Logical calculation circuit, logical calculation device, and logical calculation method
Fabrication of cleaved semiconductor lasers
Folded air bag
Device for self-tailing a conventional winch drum
Terminal connecting apparatus
Scroll compressor lubrication
Hindered amine light stabilizer for improved yellow dark stability
Scanner system and method for registering surfaces
AC Synchro signal to digital signal converter