초록 ▼

An ultrasonic sensor for performing sensing a spatial area and/or measuring ontactless a distance has at least one ultrasonic transducer for sending ultrasonic impulses and/or receiving the echo of the ultrasonic impulses. A device for concentrating the energy of the ultrasonic impulses onto a spati

An ultrasonic sensor for performing sensing a spatial area and/or measuring ontactless a distance has at least one ultrasonic transducer for sending ultrasonic impulses and/or receiving the echo of the ultrasonic impulses. A device for concentrating the energy of the ultrasonic impulses onto a spatial area to be sensed and for concentrating the energy of the echo of the ultrasonic impulses onto the at least one ultrasonic transducer is provided. The device for concentrating the energy has a reflector with a reflective surface. The reflective surface has parabolic surfaces of second order. The reflector comprises reflector segments that are rigidly or movably connected to one another. A first and second reflector segments are outer segments having reflective surfaces that are paraboloid segments of 50.degree. to 120.degree. of a paraboloid of revolution with a first focal point. The paraboloid of revolution is generated by a rotation of a first parabola about an axis of symmetry thereof by an angle of rotation .alpha.. A straight line intercepting the axis of symmetry of the first parabola at the first focal point contacts the parabola at a second focal point that is a vertical projection of the first focal point. A third reflector segment is a first inner segment having a reflective surface embodied as a parabolic surface.

대표청구항 ▼

[ What I claim is:] [1.] An ultrasonic sensor for performing at least one function selected from the group of sensing a spatial area and of measuring contactless a distance, said ultrasonic sensor comprising:at least one ultrasonic transducer for performing at least one function selected from the gr

[ What I claim is:] [1.] An ultrasonic sensor for performing at least one function selected from the group of sensing a spatial area and of measuring contactless a distance, said ultrasonic sensor comprising:at least one ultrasonic transducer for performing at least one function selected from the group of sending ultrasonic impulses and receiving the echo of the ultrasonic impulses;a device for concentrating the energy of the ultrasonic impulses onto a spatial area to be sensed and for concentrating the energy of the echo of the ultrasonic impulses onto the at least one ultrasonic transducer;said device for concentrating the energy having a reflector with a reflective surface;said reflective surface comprised of parabolic surfaces of second order;said reflector comprising reflector segments that are fixedly or movably connected to one another;wherein a first and a second of said reflector segments are outer segments having reflective surfaces that are paraboloid segments of 50.degree. to 120.degree. of a paraboloid of revolution with a first focal point, said paraboloid of revolution generated by a rotation of a first parabola about an axis of symmetry thereof by an angle of rotation .alpha.;wherein a straight line, intercepting said axis of symmetry of said first parabola at said first focal point, contacts said first parabola at a second focal point that is a vertical projection of said first focal point;wherein a third of said reflector segments is a first inner segment having a reflective surface embodied as a parabolic surface.