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
Circuit for and method of enabling communication of cryptographic data
Knife grip
Testing apparatus and testing method for telephone apparatus
Multiple carrier compression scheme
Eyeglasses
Highly detectable pilot structure
Horizontal aggregations in a relational database management system
  Randomly Featured Patents
Totally confined explosive welding
Reduced drag airfoil platforms
Process for producing cysteinylglycine-enriched food material and process for producing flavor-enhancing agent
Tire tread
Alarm system
Ridged waveguide window assembly
Cooling device for battery pack and rechargeable battery
Copying apparatus capable of handling original having protruding portion
Adjustable shoe heel spring and stabilizer
Coreless printed-circuit-board (PCB) transformers and operating techniques therefor