Abstract: An apparatus for measuring the force of an impact delivered by a user, comprises an impact receiving section for absorbing the impacts delivered by the user. The impact receiving section includes an open cell foam layer for generating pressure pulses which vary in amplitude according to the location where the impact is delivered on the impact receiving section by the user. A pressure sensor which communicates with the impact receiving section, is provided for receiving the pressure pulses generated by the open cell foam layer and provides an electrical signal which is indicative of the impacts delivered by the user. The apparatus also includes an electrical circuit which comprises a high pass filter coupled to the pressure sensor, for filtering the electrical signal generated by the pressure sensor. A threshold detector circuit is coupled to the high pass filter, for detecting if the electrical signal exceeds a predetermined level.

Abstract: Laser control apparatus for controlling a laser beam with respect to a working area to trace a desired pattern on a working area comprises an input device for inputting the desired pattern; a memory for storing a line pattern; a display for displaying the pattern; and a control system for controlling the laser beam. The control system comprises a Line-Operation selector and an Area-Operation selector, the Line-Operation selector being effective to cause the line pattern stored in the memory to be reproduced by the laser beam on the object, the Area-Operation selector being effective to cause the line pattern stored in the memory to be converted to an area pattern enclosing the area bounded by the line.