Blast recorder and method of displaying blast energy

Abstract From the Canadian patent

A blast recorder and method for monitoring and processing vibrations from blasts, and for displaying the results in a nearly real time basis and in a manner which is easily interpreted by a relatively unskilled field worker and corresponds to a form which closely correspond to the real damage causing aspect of the blast than heretofore. The invention operates by receiving seismic energy signals from a blast sensor, processing the energy signals to obtain velocity signals relating to said blast filtering either the energy signals prior to or the, velocity signals following said processing step into, high and low frequency bands, to obtain high and low band velocity signals, integrating over …