Ultrasonic flow meter including guide elements
First Claim
1. An ultrasonic flow meter for measuring a flow velocity of a fluid flowing in a primary flow direction, comprising:
- at least two ultrasonic transducers capable of at least one of emitting and receiving an ultrasonic wave at an angle α
to the primary flow direction that is different from 90°
; and
at least one guide element one of entirely and partially situated in the flowing fluid, wherein;
the at least one guide element diverts at least one part of the flowing fluid in such a way that in the diversion, a velocity component perpendicular to the primary flow direction is imparted to the at least one part of the flowing fluid.
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Accused Products
Abstract
The measurement of volume flows or mass flows in the intake system of motor vehicle internal combustion engines plays a significant role in reducing pollutant emissions. Therefore, an ultrasonic flow meter for measuring a flow rate of a fluid flowing in a primary flow direction is described. The ultrasonic flow meter has at least two ultrasonic transducers, the ultrasonic transducers being capable of emitting and/or receiving ultrasonic waves at an angle α to the primary flow direction which is different from 90°. Furthermore, the ultrasonic flow meter has at least one guide element which is entirely or partially situated in the fluid. This guide element diverts at least one part of the flowing fluid in such a way that in the diversion, a velocity component is transferred to at least one part of the flowing fluid perpendicular to the primary flow direction. Guide vanes or displacers in particular are described as guide elements. In addition, turbulators may be provided on the guide elements, the turbulators generating a longitudinal fluid bed along the guide elements and thus causing the flow of the fluid to have a better contact with the guide elements when flowing around them. This reduces turbulences within the ultrasonic flow meter. Compared to the devices known from the related art, the ultrasonic flow meters described are distinguished by an improved signal-to-noise ratio and accordingly by a higher measuring precision.
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Citations
12 Claims
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1. An ultrasonic flow meter for measuring a flow velocity of a fluid flowing in a primary flow direction, comprising:
-
at least two ultrasonic transducers capable of at least one of emitting and receiving an ultrasonic wave at an angle α
to the primary flow direction that is different from 90°
; andat least one guide element one of entirely and partially situated in the flowing fluid, wherein; the at least one guide element diverts at least one part of the flowing fluid in such a way that in the diversion, a velocity component perpendicular to the primary flow direction is imparted to the at least one part of the flowing fluid. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification