Ultrasonic sensor having a deflecting element
A deflection element, ultrasonic technology, applied to engine components, material analysis using sound waves/ultrasonic waves/infrasonic waves, instruments, etc., can solve problems such as sensor failure to achieve connection, thermal expansion characteristics difference, sensor function loss, etc.
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[0021] exist figure 1 In the figure, only the sonotrode 1 and the acoustic deflection element 10 of a prior art ultrasonic sensor, which also serve as a receiver, are shown. The sound pulses emitted by the sonotrode 1 pass through the bottom wall 7 of the liquid tank in which eg a urea solution is contained. With the ultrasonic sensor, the concentration of the urea solution is to be determined by ultrasonic transit time measurement. In this case, the sound pulse 2 deflected within the deflection element 10 reaches the reflector in a horizontal sound path, is reflected back there and passes through the deflection element 10 again to the sound generator 1 which also operates as a receiver.
[0022] The prior art deflection element 10 shown here has an approximately triangular-shaped plastic molding 3 , which carries a metal mirror element 4 made of stainless steel on its slope. The disadvantages of such an embodiment have already been discussed above.
[0023] In the deflecti...
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