Rotational velocity transducer with pulses at proportional frequency - is particularly suited to liq. flow rate measurement devices using immersed impellerAn angular velocity transducer produces a pulse train of frequency proportional to that angular velocity, which is suitable for use in a liquid flow ...
Further, depending on the charger’s topology and control, the potential VE of the battery to earth might fluctuate with switching frequency of the charger, leading to ground leakage currents through ground capacity CE (Figure 17.13). These ground leakage currents cause unnecessary losses and might...
whose resonant frequency is related to the PA pressure. The sensor is electromagnetically coupled via the inductor component, eliminating the need for abatteryin the transducer. Pressure data is wirelessly transmitted back to a receiver unit, which can be uploaded by the user into a database [93...
Each rotary movement-electrical signal transducer subsystem supplies an electrical signal which is in pulses frequency-related to the rotary movement of a wheel. These signals are read and interpreted by the computer controller, which, when a skid is indicated during braking of the automobile, ...
To characterize the mechanical vibrations within a single element, we used the EQC model to calculate the peak velocities at a 3-MHz resonance frequency of all cells within one element (Fig.4a–c), considering the mutual acoustic coupling effects. The EQC model-derived results were compared with...
pulses with arbitrary form and duration.In order to drive theultrasonic transducer at non-resonant frequency a highvoltage sinusoidal signal with desired frequency is appliedon the piezo-element.The frequency can vary from 1 kHzup to 300 kHz.The number of cycles can be adjust...
3. The transducer apparatus of claim 2, further including a differentiator connected to an output of said integrator for producing pulses with amplitudes proportional to said reciprocal capacitances. 4. The transducer apparatus of claim 3, wherein said transducer circuit includes a common signal chann...
Accuracy in reproducing pulses roughly corresponded with the high-frequency sensitivity of the sensors. We conclude that there are important differences among commonly used lung sound sensors that have to be defined to allow the comparison of data from different laboratories. 展开 ...
An acoustic transducer having a curved surface to match the inner or outer surfaces of a target surface such as a cylindrical borehole tubular is disclosed. A sequence of excitation pulses causes the transducer to launch a series of high-frequency, short duration acoustic energy pulses toward the...
5. The ultrasound scanning device of claim 4, a magnetic drive assembly controller is to scan the ultrasound transducer in the first scan plane to effect one of either Doppler velocity data, pulse-echo ultrasound data for radio-frequency tracking, or B mode data over the first scan plane. 6...