Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Method and apparatus for impacting a surface with a controlled impact energy










Image Number 7 for United States Patent #4711754.

A method and apparatus for impacting a surface with a desired kinetic impact energy wherein an impacting device which can apply a variable impact energy corresponding to the magnitude of an input control signal is provided and placed adjacent the surface to be impacted. Thereafter, an input control signal of a preset magnitude is applied to the impact device to initiate an impact, the kinetic energy of the impact is determined, the value of the determined kinetic energy is compared with a value corresponding to the desired kinetic impact energy, the results of the comparison are indicated, the preset magnitude of the signal used for the control signal is adjusted to reduce any difference noted as a result of the comparison, and the process is repeated until a repeatable impact of the desired impact energy is determined and indicated. Preferably, the impacting device is a solenoid whose plunger provides the impact, the input control signal is an input voltage applied across the solenoid coil, and the impact energy is determined by measuring the velocity of the plunger just prior to impact by: sampling the magnitude of a signal, whose magnitude is proportional to the distance moved by said plunger, at uniform time increments; subtracting the sampled values from successive sampling times to provide difference values; and, upon detecting a zero difference value, indicating that impact has occurred, utilizing the immediately previously provided difference value as a measure of the velocity of the plunger just prior to impact, and thus of the kinetic impact energy.








 
 
  Recently Added Patents
Location-type tagging using collected traveler data
Earphone
Method of patterning color conversion layer and method of manufacturing organic EL display using the patterning method
Charge pump and method of biasing deep N-well in charge pump
Network-based dynamic encoding
Elastic wave device having a capacitive electrode on the piezoelectric substrate
Pet bed
  Randomly Featured Patents
Method for producing an InSb thin film element
Laser spraying
Method for precipitating iron from a zinc sulphate solution as hematite
Tire tread
Fixture
Process for producing shaped boron nitride product
Process for preparing substituted valine amide derivatives
Method and device of correcting a welding path of an automatic welding apparatus
Method for coding in a telecommunications system
Blends of thermoplastic polyester resins and amorphous polyamides