Abstract: A frequency-variation type demodulator and demodulating method. A start signal is received by a control signal apparatus. After a delay time, a control signal is output. The control signal, a start frequency, a frequency variation slope and a clock are received by an in-phase and quadrature-phase function generator. A phase value is output via mathematical calculation. According to the phase value, a cosine and sine values are obtain by checking a phase look-up table in a first and a second ROM units, respectively. The cosine value is multiplied by a measured digital data in a first multiplier to obtain an in-phase demodulating signal, and the sine value is multiplied by the measured digital data to obtain a quadrature-phase demodulating signal.

Abstract: A dynamic delay curve generation method for an ultrasonic imaging system having the following steps: (1) obtaining three initial values of K0, N0 and &phgr;1 from a parameter decoder, where K0 is the initial delay weighted parameter, N0 is the initial delay cycle number and φ 1 = 1 - x 2 ⁢ cos 2 ⁢ θ N 0 ⁢ V 2 ⁢ T R ⁢ Δ ⁢   ⁢ t 0 ; (2) defining A=N0+&phgr;1, B=1+N0, C&

Abstract: A frequency-variation type demodulator and demodulating method. A start signal is received by a control signal apparatus. After a delay time, a control signal is output. The control signal, a start frequency, a frequency variation slope and a clock are received by an in-phase and quadrature-phase function generator. A phase value is output via mathematical calculation. According to the phase value, a cosine and sine values are obtain by checking a phase look-up table in a first and a second ROM units, respectively. The cosine value is multiplied by a measured digital data in a first multiplier to obtain an in-phase demodulating signal, and the sine value is multiplied by the measured digital data to obtain a quadrature-phase demodulating signal.

Abstract: A dynamic delay curve generation method for an ultrasonic imaging system having the following steps: (1) obtaining three initial values of K0, N0 and &phgr;1 from a parameter decoder, where K0 is the initial delay weighted parameter, N0 is the initial delay cycle number and 1 φ 1 = 1 - x 2 ⁢ cos 2 ⁢ θ N 0 ⁢ V 2 ⁢ T R ⁢ Δ ⁢   ⁢ t 0 ;

Abstract: The present invention relates to a cutting tool assembly which can cut spring wires in either a vertical or a progress tilt direction in coil spring winding machines. This assembly uses a cam seat and a cam center guide seat for the cutting in a vertical direction. To do the cutting in a progressive tilt direction, the cam center guide seat is dismantled and the slide in the cam seat is fixed by screws. The cutting point can also be adjusted for the manufacture of special springs. This assembly provides a cheaper and an easy way for switching the cutting direction.

Abstract: A versatile spring making machine including a processing tool locating unit consisting of a transverse slide moved in the transverse direction and a longitudinal slide moved in the longitudinal direction, a tool assembly moved by the processing tool locating unit to the desired processing position for processing a steel wire into springs, a feeder unit having feeding rollers controlled to feed a steel wire to the tool assembly for processing, a material guiding unit having guiding rollers controlled to deliver a steel wire to the feeder unit, and a straightener unit disposed between the material guiding unit and the feeder unit and controlled to straighten the steel wire from the material guiding unit or to turn it axially.