FLOW METER UNIT WITH WATER-TIGHT CASING
First Claim
1. An ultrasound flow meter unit arranged to measure a flow rate of a fluid, the unit comprising:
- first and second ultrasound transducers to allow ultrasound signals to travel between the first and second ultrasound transducers through the fluid,a circuit board with an electronic circuit arranged for operating the first and second ultrasound transducers, anda casing having a part formed by a membrane, wherein the first and second ultrasound transducers and the circuit board with the electronic circuit are positioned within the casing, wherein the ultrasound transducers are arranged so that the ultrasound signal penetrate the membrane, and where the casing, the circuit board and the ultrasound transducers form a unit,wherein the casing is a water-tight casing having a casing part for direct contact with the fluid to be measured, the casing part for direct contact with the fluid being formed by the membrane in the form of a common protection membrane arranged to protect both of the first and second transducers against direct contact with the fluid to be measured.
1 Assignment
0 Petitions
Accused Products
Abstract
An ultrasound flow meter unit, e.g. a unit forming part of a flow meter for ultrasonic measurement of a fluid flow. The unit comprises two ultra-sound transducers 206, a circuit board 202 with an electronic circuit 204 arranged for operating the ultrasound transducers 206, and a common protection membrane 132, such as a sheet of metal, for protecting the transducers 206. The common protection membrane 132 forms part of a water-tight casing, such as an IP68 class casing. The two ultrasound transducers 206 and the circuit board 202 with the electronic circuit 204 are positioned within the water-tight casing and thus protected against damaging humidity. A glass sealed feed-through 128 can be used to provide external electrical contact to the electronic circuit 204, i.e. for outputting an electric flow rate signal. Such flow meter unit is highly versatile within many applications since it provides a compact and robust unit. The unit can be used with or integrated in many types of devices, e.g. flow meters, such as used in consumption meters tor charging purposes or in many other industrial or home applications.
53 Citations
22 Claims
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1. An ultrasound flow meter unit arranged to measure a flow rate of a fluid, the unit comprising:
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first and second ultrasound transducers to allow ultrasound signals to travel between the first and second ultrasound transducers through the fluid, a circuit board with an electronic circuit arranged for operating the first and second ultrasound transducers, and a casing having a part formed by a membrane, wherein the first and second ultrasound transducers and the circuit board with the electronic circuit are positioned within the casing, wherein the ultrasound transducers are arranged so that the ultrasound signal penetrate the membrane, and where the casing, the circuit board and the ultrasound transducers form a unit, wherein the casing is a water-tight casing having a casing part for direct contact with the fluid to be measured, the casing part for direct contact with the fluid being formed by the membrane in the form of a common protection membrane arranged to protect both of the first and second transducers against direct contact with the fluid to be measured. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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2-10. -10. (canceled)
Specification