Patent ID: 6934649

Claim:
A waveform detection system comprising: a sensor, a signal input, a computer to characterize signal data based on signals output from the signal input, a determinator to determine the characteristics of waveforms based on the output of the computer, and an output to show the result of determination of the determinator, wherein the computer has a digital filter calculator, a phase matching parameter setter, and a synthesizer; the digital filter calculator has digital filters each equipped with a delay memory to store and delay input signals and a multiplication coefficient pattern memory to store multiplication coefficient patterns, and a parameter setter; the parameter setter has a multiplication coefficient pattern setter to set multiplication coefficient pattern and a filter parameter setter; the digital filter calculator connects signal data input from the signal input to the digital filters, calculating and outputting the sum of products for the contents of both memories; the outputs of the digital filter calculator are merged at the synthesizer, and signs of state change are characterized based on the synthesized output, wherein, furthermore, multiple digital filters are installed at the digital filter calculator in the computer; the coefficient patterns derived from non-integer n-time integration are used as elemental multiplication coefficient patterns; a means is provided to change the phase of at least one of the elemental patterns, input signal data, and digital filter output (phase-matching parameter setter); and the outputs of digital filters that use the elemental patterns are synthesized in a state where a portion of the phases of the characteristic extracting and processing function is changed.