Air Ultrasonic Ceramic Transducers Circuit

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This technology is used for detection of objects in burglar alarms and automatic doors as well as for range measurement in automotive parking assistance systems.

Air ultrasonic ceramic transducers circuit.

Tested under 1vrms oscillation level 400sr120 impedance 400sr120 phase 400st120 impedance 400st120 phase. 40 to 500 khz. Capacitance at 1khz 20 250st 3000 pf. It is the combination of specially designed transducers with the proper driver receiver instrumentation that has made air coupled ultrasonic inspection a valuable new.

The ultrasonic receiver is composed of an ultrasonic transducer and a receiving circuit. 0db re 0 0002μbar per 10vrms at 30cm 112db min. In order to achieve a wide range of ultrasonic ranging it is required not only that the ultrasonic receiving circuit can amplify the weak signal reflected from the distant target but also that the strong signal reflected from the close target is amplified and not deformed which requires reception. Figure 6 shows the c scan of a carbon carbon break disk and figure 7 shows the c scan of solar honeycomb panel.

0db re 0 0002µbar per 10vrms at 30cm 112db min. Air ultrasonic ceramic transducer excitation home. Sensor design implementation air ultrasonic ceramic transducer excitation. All these examples were scanned in through transmission with 400 khz air coupled toneburst method.

Receiving sensitivity at 25 0khz 0db 1 volt µbar 62db min. 0db re 0 0002 µbar. 400st120 400sr120 center frequency bandwidth 400st120 400sr120 transmitting sound pressure level re 0 0002µbar. Air ultrasonic ceramic transducers 250st r160 specification 250st160 transmitter 250sr160 receiver center frequency 25 0 1 0khz bandwidth 6db 2 0khz transmitting sound pressure level at 25 0khz.

400st r120 air ultrasonic ceramic transducers. Here ultrasonic sensors work as transmitter and receiver with short high frequency acoustic impulses in the range of approx. Ultrasonic sensors emit ultrasonic waves in the air that reflect off of objects. Air ultrasonic ceramic transducers 400st r160 specification 400st160 transmitter 400sr160 receiver center frequency 40 0 1 0khz bandwidth 6db 400st160 2 0khz 400sr160 2 5khz transmitting sound pressure level at 40 0khz.

Air ultrasonic ceramic transducers 250st r160 specification 250st160 transmitter 250sr160 receiver center frequency 25 0 1 0khz bandwidth 6db 250st180 2 0khz 250sr180 2 0khz transmitting sound pressure level at 25 0khz. Receiving sensitivity at 25 0khz 0db 1 volt μbar 62db min. Successful designs that use smt common mode chokes to isolate the supply lines going to the various sections of the circuit.

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