Apparatus and systems for measuring fluid flow

Abstract

Apparatus and system for measuring fluid flow. A measuring apparatus (1000) configured to be coupled to a control device (2000) comprises a fluid conduit (1200), a first electrical connector (1480, 1480', 1480"), a first ultrasonic transducer (1410) and a second ultrasonic transducer (1420), each electrically connected to the first electrical connector, and an acoustic coupling medium (1140) coupling the first and second ultrasonic transducers (1410, 1420) to the fluid conduit. The first ultrasonic transducer is configured to emit an ultrasonic signal along an acoustic path (1160) extending from the first ultrasonic transducer to the second ultrasonic transducer through the acoustic coupling medium in response to the reception of a control signal. The second ultrasonic transducer receives the ultrasonic signal transmitted along the acoustic path. The fluid conduit is configured to receive and generate a measurement signal based on the received ultrasonic signal, and is positioned at least partially along the acoustic path so that the emitted ultrasonic signal propagates along the acoustic path and strikes the medium to be measured in the measurement section (1230) of the fluid conduit. The control device (2000) comprises a housing (2100) including a coupling (2300) configured to receive the measuring device (1000), a second electrical connector (2280, 2280', 2280"), and an electronic control unit (2200, ECU) electrically connected to the second electrical connector and configured to transmit one or more control signals to the measuring device and to receive one or more measurement signals from the measuring device. The system (100) comprises the measuring device (1000) and the control device (2000).

Description

[Technical Field]

[0001] This specification relates to apparatus and systems for measuring fluid flow. [Background technology]

[0002] Flow meters are used, for example, to measure the amount of fluid flowing through a section of tubing in a fluid line or fluid circuit. The fluids being measured can generally include, for example, liquids, gases, and combinations thereof. Fluid flow can be measured based on different principles, such as mechanical flow meters, pressure flow meters, electromagnetic flow meters, and ultrasonic flow meters. Different principles have characteristics that are more or less suitable for different applications. Some applications require measuring large volumes of fluid, others demand high precision, and still others require the fluid line and flow meter to meet specific requirements, such as sterilization.

[0003] In some examples, a flow meter is configured to house a fluid line in a corresponding recess (e.g., a "clamp-on" flow meter) and has one or more sensors that determine the flow of fluid through the material of the fluid line. The characteristics of fluid flow measurement using a clamp-on flow meter depend on several factors, including the characteristics of the material of the fluid line (e.g., wear resistance, hardness, flexibility, durability), the characteristics of the fluid flow through the fluid line (e.g., viscosity, pressure, temperature, and their changes), and the operating characteristics of the fluid system (e.g., vibration). Therefore, the quality of fluid flow measurement using a clamp-on flow meter can vary due to these and other factors.

[0004] Furthermore, flexible fluid lines used with clamp-on flowmeters are typically limited in terms of the maximum pressure of the fluid being measured. In some cases, reinforced fluid lines are used in applications involving higher pressure fluids. However, such reinforcement can negatively impact fluid flow measurements if, for example, the reinforcing means (e.g., fabric, reinforcing material, increased wall thickness) attenuates or otherwise affects the signal used to measure the fluid flow rate. This can lead to poor reproducibility of the fluid flow measurements. [Overview of the project]

[0005] In general, one innovative embodiment of the subject matter described herein can be embodied in a measuring device configured to be coupled to a control device. The measuring device comprises a fluid conduit, a first electrical connector, a first ultrasonic transducer and a second ultrasonic transducer, each electrically connected to the first electrical connector, and an acoustic coupling medium that couples the first and second ultrasonic transducers to the fluid conduit. The first ultrasonic transducer is configured to emit an ultrasonic signal along an acoustic path extending from the first ultrasonic transducer to the second ultrasonic transducer through the acoustic coupling medium in response to the reception of a control signal. The second ultrasonic transducer is configured to receive the ultrasonic signal transmitted along the acoustic path and generate a measuring signal based on the received ultrasonic signal. The fluid conduit is positioned at least partially along the acoustic path so that the emitted ultrasonic signal propagates along the acoustic path and strikes the medium to be measured in the measuring section of the fluid conduit.

[0006] In a second embodiment according to embodiment 1, the acoustic coupling medium includes a first part and a second part. The first part couples a first ultrasonic transducer to a fluid conduit, and the second part couples a second ultrasonic transducer to a fluid conduit.

[0007] In a third embodiment according to embodiment 2, the measuring device further comprises an air backing positioned adjacent to the fluid conduit and separating a first portion of the acoustic coupling medium from a second portion of the acoustic coupling medium.

[0008] In a fourth aspect according to aspect 3, the air backing is configured to acoustically separate the first portion of the acoustic coupling medium from the second portion of the acoustic coupling medium such that ultrasonic signals propagating along the acoustic path do not directly propagate from the first portion to the second portion.

[0009] In a fifth embodiment according to any one of embodiments 2 to 4, the acoustic path extends from a first ultrasonic transducer to a second ultrasonic transducer, passing through a first portion of the acoustic coupling medium, through a measurement section, and through a second portion of the acoustic coupling medium.

[0010] In a sixth embodiment according to any one of the embodiments described above, the acoustic coupling medium includes a thermoplastic material. Preferably, the thermoplastic material includes an epoxy resin and / or is substantially homogeneous.

[0011] In a seventh embodiment according to any one of the embodiments described above, the measuring device further comprises a printed circuit board (1400, PCB) configured to include a first electrical connector and to electrically connect first and second ultrasonic transducers to the first electrical connector.

[0012] In the eighth aspect according to aspect 7, each of the first and second ultrasonic transducers is mechanically connected to the PCB.

[0013] In the ninth aspect according to aspect 7, the first ultrasonic transducer and the first connection portion of the first ultrasonic transducer form a first transducer module, and the second ultrasonic transducer and the second connection portion of the second ultrasonic transducer form a second transducer module.

[0014] In the tenth aspect according to aspect 9, the first and second connectors of the PCB are configured to electrically and mechanically connect the first and second ultrasonic transducers to the PCB.

[0015] In an eleventh aspect according to any one of aspects 7 to 10, the first and second connection portions of the PCB are configured to electrically and mechanically connect the first and second ultrasonic transducers to the PCB.

[0016] In a twelfth aspect according to any one of aspects 7 to 11, the first electrical connector includes one or more of a USB-C connector, a USB-A connector, a USB-B connector, a micro USB connector, a mini USB connector, an HDMI connector, and a SUB-D connector.

[0017] In a thirteenth aspect according to any one of aspects 1 to 11, the first electrical connector includes a first coil and a second coil.

[0018] In a fourteenth aspect according to aspect 13, the first coil is configured to inductively couple to a first coil of the control device, and the second coil is configured to inductively couple to a second coil of the control device.

[0019] In a fifteenth aspect according to aspect 14, the first electrical connector includes a third coil configured to inductively couple to a third coil of the control device.

[0020] In a sixteenth aspect according to any one of the foregoing aspects, the PCB includes a first coil of the first electrical connector, a second coil of the first electrical connector, and optionally, a third coil of the first electrical connector.

[0021] In a seventeenth aspect according to any one of the foregoing aspects, the first electrical connector is configured to distribute electrical signals. Optionally, the electrical signals include control signals and measurement signals.

[0022] In an eighteenth aspect according to any one of the foregoing aspects, the first electrical connector is configured to connect to a second electrical connector of the control device.

[0023] In a 19th embodiment according to any one of the embodiments described above, the first ultrasonic transducer is configured to receive a control signal from a control device through a first electrical connector, and / or the second ultrasonic transducer is configured to transmit a measurement signal to the control device through the first electrical connector.

[0024] In a 20th embodiment according to any one of the embodiments described above, the measuring device further comprises one or more sensors, one or more of which include a temperature sensor, a pressure sensor, a conductivity sensor, and an optical sensor.

[0025] In the 21st embodiment according to any one of the embodiments described above, the inner diameter of the fluid conduit is in the range of 0.1 to 0.5 inches (0.254 to 1.27 cm). Preferably, the inner diameter is 0.25 inches (0.635 cm). Alternatively, the inner diameter of the fluid conduit is in the range of 0.5 to 1.5 inches (1.27 to 3.81 cm). Preferably, the inner diameter is 1 inch (2.54 cm).

[0026] In a 22nd embodiment according to any one of the embodiments described above, the fluid conduit has a first end and a second end that are fluidly connected to each other and configured to be attached to a fluid circuit.

[0027] In the 23rd aspect according to the above-described aspect, the first end and / or second end includes one of the sanitary connector, the aseptic quick connector, and the MPX insert.

[0028] In the 24th embodiment according to any one of the embodiments described above, the measuring device further comprises a main body.

[0029] In a 25th embodiment according to any one of the embodiments described above, the main body includes a coupling portion configured to connect a measuring device to a control device.

[0030] In the 26th embodiment, which is either embodiment 24 or embodiment 25 described above, the main body defines the fluid conduit as an integral part thereof.

[0031] In the 27th embodiment, which is one of the embodiments 24 to 26 described above, the main body is configured to fix the PCB in place with respect to the fluid conduit.

[0032] In the 28th embodiment according to any one of the embodiments described above, the first ultrasonic transducer and the second ultrasonic transducer are fixedly positioned relative to the fluid conduit by an acoustic coupling medium.

[0033] In the 29th embodiment according to any one of the embodiments described above, the measuring device is configured for use in the medical and / or pharmaceutical fields.

[0034] In a 30th aspect, another innovative aspect of the subject matter described herein can be embodied in a control device comprising a housing including a coupling configured to receive a measuring device, a second electrical connector, and an electronic control unit electrically connected to the second electrical connector and configured to transmit one or more control signals to the measuring device and to receive one or more measurement signals from the measuring device.

[0035] In the 31st aspect according to the above-described embodiment, the coupling portion includes a locking mechanism configured to selectively lock or unlock the measuring device in the coupling position when coupled to the control device.

[0036] In the 32nd aspect according to the above-described embodiment, the locking mechanism includes a bayonet-type locking mechanism.

[0037] A 33rd embodiment, according to any one of embodiments 31 to 32 described above, further comprises a switch configured to selectively lock and unlock the locking mechanism. Optionally, the selective locking and selective unlocking include haptic feedback and / or audible feedback.

[0038] In a 34th embodiment according to any one of embodiments 30 to 33 described above, the control device further comprises a cover configured to cover at least a portion of the coupling.

[0039] In the 35th embodiment according to the above-described embodiment, the cover is configured to cover the second electrical connector when there is no measuring device coupled to the control device.

[0040] In a 36th embodiment according to any one of embodiments 30 to 35 described above, the control device further comprises a status indicator connected to the ECU and configured to indicate the operating state of the control device and / or the operating state of a measuring device when connected to the control device.

[0041] In the 37th embodiment, according to any one of embodiments 30 to 36 described above, the second electrical connector is configured to distribute electrical signals. Optionally, the electrical signals include control signals and measurement signals.

[0042] In the 38th embodiment, according to any one of embodiments 30 to 37 described above, when the measuring device is coupled to the control device, the control device is configured to transmit control signals to the control device and to receive a measurement signal from the measuring device, the measurement signal indicating the characteristics of the fluid flow in the measurement section of the fluid conduit of the measuring device.

[0043] In the 39th embodiment, which is one of the embodiments 30 to 38 described above, the second electrical connector includes one or more of the following: USB-C connector, USB-A connector, USB-B connector, micro USB connector, mini USB connector, HDMI connector, and SUB-D connector.

[0044] In the 40th embodiment, which is one of the embodiments 30 to 39 described above, the second electrical connector includes a first coil and a second coil.

[0045] In the 41st embodiment, which is one of the embodiments 30 to 40 described above, the first coil is configured to be inductively coupled to the first coil of the measuring device, and the second coil is configured to be inductively coupled to the second coil of the measuring device.

[0046] In the 42nd embodiment, which is one of the embodiments 30 to 41 described above, the first electrical connector includes a third coil configured to inductively couple a third coil of the measuring device.

[0047] In a 43rd embodiment according to any one of embodiments 30 to 42 described above, the control device is configured to determine the presence of a coupled measuring device, the operating state of the coupled measuring device, and one or more types of coupled measuring devices based on the inductive coupling of a third coil of the control device and the measuring device.

[0048] In the 44th embodiment, which is one of the embodiments 30 to 43 described above, the ECU includes a first coil of the second electrical connector, a second coil of the second electrical connector, and optionally a third coil of the second electrical connector.

[0049] In a 45th embodiment, according to any one of embodiments 30 to 44 described above, the second electrical connector is configured to distribute electrical signals. Optionally, the electrical signals include control signals and measurement signals.

[0050] In the 46th embodiment, which is one of the embodiments 30 to 45 described above, the second electrical connector is configured to be connected to the first electrical connector of the measuring device.

[0051] In the 47th embodiment, which is one of the embodiments 30 to 46 described above, the ECU has the function of controlling one or more sensors of the measuring device and receiving measurement signals from one or more sensors. The one or more sensors include one or more temperature sensors, pressure sensors, conductivity sensors, and optical sensors.

[0052] In the 48th embodiment, which is one of the embodiments 30 to 47 described above, the control device is made at least partially from components including stainless steel.

[0053] In the 49th aspect, according to any one of the aforementioned aspects 30 to 48, the control device is configured for use in the medical and / or pharmaceutical fields.

[0054] In a 50th aspect, another innovative aspect of the subject matter described herein can be embodied in a system for measuring fluid flow. The system comprises a measuring device according to any one of aspects 1 to 29 and a control device according to any one of aspects 30 to 49.

[0055] In the 51st aspect, another innovative aspect of the subject matter described herein can be embodied in a method for manufacturing a measuring device according to any one of aspects 1 to 29. The method includes the steps of preparing the inner surface of the body of the measuring device for casting a thermoplastic resin, positioning the PBC of the measuring device relative to the body, casting the thermoplastic resin, and curing the thermoplastic resin.

[0056] In the 52nd aspect according to the aforementioned aspect 51, the method further includes the step of positioning a first ultrasonic transducer and a second ultrasonic transducer on the main body.

[0057] Each of the embodiments described above and other embodiments may optionally include one or more of the features described above, either individually or in combination. In particular, one embodiment includes all of the following features in combination:

[0058] The subject matter described herein can be realized in particular embodiments to achieve one or more of the following advantages: A system and / or apparatus for measuring fluid flow can be provided that facilitates more accurate and / or reliable measurement of fluid flow. A measuring device for measuring fluid flow can be provided that can be easily and reliably coupled to a control device for measuring fluid flow. A control device for measuring fluid flow can be provided that can accept any one of a number of different measuring devices for measuring fluid flow. A system and / or control device for measuring fluid flow can be provided that can be maintained more easily and / or more efficiently. A system and / or control device for measuring fluid flow can be provided that can operate reliably over long periods of time.

[0059] Details of one or more embodiments of the subject matter of this specification are described in the accompanying drawings and the following description. Other features, aspects, and advantages of the subject matter will become apparent from the description, drawings, and claims. [Brief explanation of the drawing]

[0060] [Figure 1] A perspective view of an apparatus for measuring fluid flow according to an embodiment of this specification is shown. [Figure 2] A perspective view of a measuring device for measuring fluid flow according to an embodiment of this specification is shown. [Figure 2A] Figure 2 shows a partial side view of a printed circuit board according to an embodiment of this specification. [Figure 3] A perspective view of a control device for measuring fluid flow according to an embodiment of this specification is shown. [Figure 3A] A perspective view of a system for measuring fluid flow according to an embodiment of this specification is shown. [Figure 4A] A perspective view of a control device for measuring fluid flow according to an embodiment of this specification is shown. [Figure 4B] A perspective view of a control device for measuring fluid flow according to an embodiment of this specification is shown. [Figure 5] A cross-sectional view of a device for measuring fluid flow according to the first embodiment of this specification is shown. [Figure 5A] The following shows a perspective front view and a perspective rear view of a transducer module according to an embodiment of this specification. [Figure 5B] This shows a perspective view of a vibrator module arranged on a PCB according to an embodiment of this specification. [Figure 5C] The image shows a top view of a connector, according to an embodiment of this specification, which is positioned on a PCB and configured to receive an oscillator module. [Figure 6] A cross-sectional view of a device for measuring fluid flow according to a second embodiment of this specification is shown. [Figure 7] A cross-sectional view of a measuring device and control device for measuring fluid flow according to the first embodiment of this specification is shown, illustrating a second variation of the electrical connection. [Figure 8] The following shows an electrical circuit diagram of the electrical connections of a measuring device and control device for measuring fluid flow according to the first embodiment of this specification. [Figure 9] A cross-sectional view of a measuring device for measuring fluid flow according to the first embodiment of this specification is shown, illustrating a third variation of the electrical connection. [Figure 10] An electrical circuit diagram of an electrical circuit for detecting a measuring device according to an embodiment of this specification is shown. [Figure 11] An electrical circuit diagram of an electrical circuit for detecting a measuring device according to an embodiment of this specification is shown. [Figure 12A] This shows a bottom view of a measuring device for measuring fluid flow according to an embodiment of this specification. [Figure 12B] A perspective view of a control device for measuring fluid flow according to an embodiment of this specification is shown. [Figure 13]This figure shows a process for determining the pair of ultrasonic transducers to be used, according to an embodiment of this specification. [Figure 14] This is a flowchart of an exemplary process for manufacturing a measuring device 1000 according to embodiments of this specification. [Figure 15] A cross-sectional view of a device for measuring fluid flow according to the first embodiment of this specification is shown.

[0061] Similar reference numbers and names in various drawings refer to the same elements. [Modes for carrying out the invention]

[0062] Figure 1 shows a perspective view of the apparatus 1000 for measuring fluid flow according to an embodiment of this specification. In this specification, the apparatus 1000 for measuring fluid flow may be referred to as the “measuring” apparatus 1000 or the “single-use” apparatus 1000. As will be further described below, the system 100 for measuring fluid flow includes the measuring apparatus 1000 (see, for example, Figures 1, 2, and 12A) and the control device 2000 (see, for example, Figures 3, 4, and 12). Without general limitations, the measuring apparatus 1000 is designated for single use and / or use over a limited period (e.g., single use extending from one hour to one day or more, or uninterrupted use). In some examples, the measuring apparatus 1000 is designated for single use for a maximum of 30 days and cannot be reused. Without general limitations, the control device 2000 is designated for multiple use and / or long-term (continuous) use (e.g., multiple single uses or operation over several years in combination with the measuring apparatus 1000). A detailed description of embodiments of the measuring device 1000, the control device 2000, and the system 100 is given below.

[0063] Figure 1 shows an external perspective view of the measuring device 1000, where "outer" refers to the mounting configuration in which the measuring device 1000 is coupled to the control device 2000 (not shown in Figure 1). In some embodiments, the control device 2000 is positioned on a mounting surface 2310 that extends substantially vertically, such that the outside of the measuring device 1000 extends substantially vertically. In such embodiments, the outside faces away from the mounting surface 2310 of the control device 2000 (for example, forward towards the operators of the devices 1000 and 2000).

[0064] In other embodiments, the control device 2000 is positioned on a mounting surface 2310 that extends substantially in a horizontal plane, such that the outside of the measuring device 1000 also extends substantially in a horizontal plane. In such embodiments, the outside faces away from the mounting surface 2310 of the control device 2000 (for example, upward toward the operators of the devices 1000 and 2000).

[0065] The measuring device 1000 includes a body 1100 that defines a fluid conduit 1200 having a first end 1210 and a second end 1220. The fluid conduit 1200 is configured to receive a fluid, for example, a medium to be measured, at one end of the first end 1210 and the second end 1220, and to discharge the fluid at the other end of the first end 1210 and the second end 1220. In some embodiments, the direction of the fluid flow through the fluid conduit 1200 is, for example, a preferred or required direction from the first end 1210 to the second end 1220. The fluid conduit 1200 further includes a measuring section 1230 located between the first end 1210 and the second end 1220. In some embodiments, the measuring section 1230 is located substantially in the center of the body 1100. Figure 1 schematically shows the measuring section 1230 for illustrative purposes only. The measurement section 1230, as schematically shown in Figure 1, is not particularly limited in size, shape, form, or location. In some embodiments, the measurement section 1230 is substantially defined by the characteristics and arrangement of ultrasonic transducers 1410, 1420 (not shown in Figure 1), as further described below.

[0066] Depending on the application for measuring fluid flow, the fluid conduit 1200 and / or other components of the measuring device 1000 can be adapted accordingly. In one embodiment, the dimensions of the fluid conduit 1200 can be adapted to the specific characteristics of each application for measuring fluid flow and / or the medium to be measured. On the other hand, for example, at low volumetric flow rates, it may be difficult to achieve the desired resolution or accuracy of the fluid flow measurement due to the fact that low flow velocities cannot be well resolved in time. On the other hand, at high flow rates, the dynamic pressure in the conduit may rise to the point of damaging the fluid medium. By using fluid conduits with different diameters, such effects arising from applications where lower volumetric flow rates are measured or from applications where higher volumetric flow rates are measured can be reduced or eliminated.

[0067] For example, for applications where lower volumetric flow rates are measured, the measuring device 1000 may include a body 1100 that defines a fluid conduit 1200 having a relatively small diameter. In some embodiments for measuring lower volumetric flow rates, the diameter of the fluid conduit 1200 can be between 0.1 inches and 0.5 inches (0.254 cm and 1.27 cm), preferably 1 / 4 inch (0.635 cm). In some examples, lower volumetric flow rates refer to flow rates in the range of 1 ml / min and 8000 ml / min, depending on the inner diameter of the fluid conduit 1200. For example, for applications where higher volumetric flow rates are measured, the measuring device 1000 may include a body 1100 that defines a fluid conduit 1200 having a relatively large diameter. In some embodiments, to measure higher volumetric flow rates, the diameter of the fluid conduit 1200 can be between 0.5 inches and 1.5 inches (1.27 cm and 3.81 cm), preferably 1 inch (2.54 cm). In some examples, lower volumetric flow rates refer to flow rates in the range of 150 ml / min to 120,000 ml / min, depending on the inner diameter of the fluid conduit 1200.

[0068] An apparatus 1000 having a body 1100 defining a fluid conduit 1200 having a relatively small diameter, and employed to measure lower volumetric flow rates, typically exhibits higher resolution or accuracy at such lower volumetric flow rates, e.g., 3% or less, preferably 1% or less. Such an apparatus 1000 may not be able to measure higher volumetric flow rates because the fluid flow is restricted by the relatively small diameter of the fluid conduit 1200 and / or due to potential damage to the fluid medium to be measured, for example, caused by excessive pressure.

[0069] A device 1000 having a body 1100 that defines a fluid conduit 1200 with a relatively large diameter, and employed to measure higher volumetric flow rates, typically exhibits lower resolution or accuracy at lower volumetric flow rates (e.g., 250 ml / min or less). However, the resolution or accuracy of such a device 1000 typically increases as the volumetric flow rate increases. Such a device 1000 may be able to measure lower volumetric flow rates, albeit with lower resolution or accuracy.

[0070] In some embodiments, the fluid conduit 1200 has the form of a straight channel or pipe between its first end 1210 and second end 1220. This reduces or eliminates perturbations to the fluid flow profile through the fluid conduit 1200.

[0071] The first end 1210 and the second end 1220 of the fluid conduit 1200 are configured to connect to the respective fluid lines of the fluid circuit. For this purpose, the first end 1210 and the second end 1220 of the fluid conduit 1200 may be provided with corresponding shapes or connectors. In the embodiments shown in Figures 1 and 2, the first end 1210 and the second end 1220 of the fluid conduit 1200 have the shape of a hose barb (or "single-barb") configured to receive or connect a hose or flexible tube. The use of hose barb connectors and corresponding flexible tubes may involve one or more of the following: Because connecting the tube to the hose barb connector requires opening the circuit and attaching the tube to the hose barb connector, retroactively attaching the measuring device 1000 to the fluid circuit may lead to contamination of the fluid and / or the circuit. This can be avoided by using connectors with seals that break when the tube is connected to the device (e.g., Aseptic Quick connectors or MPX inserts). In another example, flexible tubing may be attached to the measuring device 1000 in an undesirable manner, including, for example, an incomplete connection or a diagonal or bent extension from the connector to the tube. In such cases, the fluid flow through the fluid conduit 1200 may be impaired, potentially leading to disturbances in the flow profile of the medium under measurement and increased shear forces. This could adversely affect measurements performed using the measuring device 1000. In yet another example, in some applications, not only is the volumetric flow rate measured, but other properties of the medium to be measured are also monitored, for example, whether bubbles are potentially present in the medium. To reliably detect bubbles in the medium to be measured, the fluid flow through the fluid conduit 1200 must be as smooth as possible and free from perturbations.

[0072] In other embodiments, the first end 1210 and the second end 1220 of the fluid conduit 1200 may be equipped with corresponding connectors, including but not limited to sanitary connectors, aseptic quick connectors, MPX inserts, and the like.

[0073] In some embodiments, the main body 1100 includes a cover 1150. The cover 1150 serves to protect the outer surface of the measuring device 1000 and / or the main body 1100. Furthermore, the cover 1150 may be provided with marks or labels indicating the characteristics of the measuring device 1000, instructions for use, etc.

[0074] Figure 2 shows a perspective view of a measuring device 1000 for measuring fluid flow according to an embodiment of this specification. Figure 2 shows a perspective view of the coupling side of the measuring device 1000, where “coupling side” refers to a mounting configuration in which the measuring device 1000 is coupled to a control device 2000 (not shown in Figure 2). In some embodiments, the control device 2000 is positioned with a mounting surface 2310 that extends substantially in a vertical plane such that the coupling side of the measuring device 1000 extends substantially along a vertical plane and faces the mounting surface 2310 of the control device 2000 (for example, away from the operators of the devices 1000 and 2000).

[0075] In the embodiment shown in Figure 2, the body 1100 has a coupling side 1300 comprising mounting means 1320 configured to engage with corresponding mounting means 2320 of a control device 2000 configured to mount the measuring device 1000. In the illustrated embodiment, the mounting means 1320 includes radially projecting projections configured to engage with the mounting means 2320 of the control device 2000. In some embodiments, the radially projecting projections are provided along the circumference of the body 1100. The distance between adjacent radially projecting projections is configured to restrict the insertion and / or mounting of the measuring device 1000 to the mounting means 2320 of the control device 2000 to only a single position and / or orientation in order to prevent inaccurate or improper mounting of the measuring device 1000.

[0076] Figure 2 shows an exemplary configuration of the printed circuit board (PCB) 1400 relative to the main body 1100. When the measuring device 1000 is coupled to it, the PCB 1400 is coupled to the main body 1100 on the coupling side of the measuring device 1000 facing the mounting surface 2310 of the control device 2000. The PCB 1400 is positioned relative to the main body 1100 and the fluid conduit 1200 such that the PCB 1400 extends in a plane substantially parallel to the longitudinal axis of the fluid conduit 1200, with the first and second ends 1401, 1402 of the PCB 1400 extending beyond the fluid conduit 1200 when viewed from the coupling side of the measuring device 1000. When the control device 2000 is mounted, the PCB 1400 is further positioned between the fluid conduit 1200 and the mounting surface 2310 on the coupling side of the measuring device 1000 facing the mounting surface 2310 of the control device 2000.

[0077] The PCB 1400 includes an electrical connector 1480 configured to connect to a corresponding electrical connector 2280 of the control device 2000. In some embodiments, the electrical connector 1480 extends from the PCB 1400 in a direction substantially perpendicular to the plane of the PCB 1400 and / or toward the coupling side of the measuring device 1000. The electrical connector 1480 is generally configured to face the mounting surface 2310 of the control device 2000 when the measuring device 1000 is coupled to the control device 2000, so that an electrical connection 1480, 2280 is achieved between the electrical connector 1480 of the measuring device 1000 and the electrical connector 2280 of the control device 2000, as in the first modification.

[0078] In some embodiments, the electrical connector 1480 may include a USB-C connector (e.g., a USB-C plug). The electrical connector 2280 may include a USB-C connector (e.g., a USB-C socket). Alternative electrical connectors (e.g., male / female, plug / socket) may include, but are not limited to, USB-A, USB-B, micro USB, mini USB, HDMI and its variations, as well as SUB-D.

[0079] In some embodiments, the electrical connections 1480 and 2280 have one or more of the following characteristics: The electrical connections 1480 and 2280 include multiple electrical contacts (e.g., contact pins), preferably at least four electrical contacts, more preferably at least eight electrical contacts. The electrical contacts are suitable for signal transmission using low voltage (e.g., safety extra-low voltage, SELV). The electrical contacts have low contact resistance and / or low intrinsic capacitance. The electrical connectors 1480 and 2280 are designed for a large number of mating cycles (e.g., at least 10,000 mating cycles).

[0080] Figure 2 shows a fluid conduit 1200 extending from a first end 1210 to a second end 1220 through the main body 1100. Generally, the fluid conduit 1200 is configured to allow a smooth fluid flow through it. In some embodiments, the fluid conduit 1200 is defined as a substantially straight tube or pipe between the first end 1210 and the second end 1220. The diameter of the fluid conduit 1200 is substantially the same along the direction of fluid flow through it (e.g., from the first end 1210 to the second end 1220, or vice versa). This can reduce or eliminate turbulence in the medium flowing through the fluid conduit 1200.

[0081] Figure 2A shows a partial side view of the PCB 1400 shown in Figure 2, according to an embodiment of the present invention. In some embodiments, the electrical connector 1480 is bonded to the PCB 1400 based on a "hot melt" process. Preferably, the hot melt material has a Shore hardness in the range of 60 to 80 according to ASTM D2240. This bond seals the connection between the electrical connector 1480 and the PCB 1400 and can have at least two effects. On the one hand, this electrically insulates the connection and allows the thermoplastic casting (e.g., epoxy casting) of the PCB 1400 and the body 1100 of the measuring device 1000 to fix the PCB 1400 and all related components relative to the body 1100 and / or fluid conduit 1200. On the other hand, this allows the electrical connector 1480 to be mechanically fixed to the PCB 1400, making it easier to connect the measuring device 1000 to the control device 2000 (for example, without requiring the electrical connectors 1480 and 2280 to be connected in separate manual steps).

[0082] Figure 3 shows a perspective view of a control device 2000 for measuring fluid flow according to an embodiment of this specification. The control device 2000 includes a housing 2100 and a coupling 2300. The coupling 2300 includes a mounting surface 2310 and mounting means 2320. The mounting means 2320 is configured to engage with the corresponding mounting means 1320 of the measuring device 1000 when the measuring device 1000 is coupled to the control device 2000.

[0083] In some embodiments, the coupling portion 2300 includes a bayonet-type lock that can be operated by a switch 2360 (e.g., a slider, pusher, or other handle) to lock or unlock the measuring device 1000 in a predetermined position when the measuring device 1000 is coupled to the control device 2000. The switch 2360 can be operated from an unlocked position, where the measuring device 1000 can be attached to or removed from the control device 2000, to a locked position, where the measuring device 1000 is locked in a predetermined position and cannot be removed from the control device 2000 (or anything attached thereto), or vice versa. In some embodiments, the switch 2360 can be configured to automatically engage from the unlocked position to the locked position when the measuring device 1000 is inserted into the coupling portion 2300 of the device 2000, or when the measuring device 1000 is engaged with the mounting surface 2310 of the device 2000. The automatic lock can be implemented in the form of a spring mechanism that is energized when the switch 2360 is (manually) unlocked and released when the measuring device 1000 is inserted / engaged.

[0084] In some embodiments, the switch 2360 and / or coupling 2300 are configured to provide tactile and / or acoustic feedback. For example, the switch 2360 and / or coupling 2300 are configured to provide a noticeable click (e.g., a tactile / tactile, acoustic sound perceived by the operator of the measuring device 1000) when the switch 2360 is positioned at a first end position (e.g., a coupled position or an unlocked position) that allows the measuring device 1000 to be coupled to the control device 2000. The switch 2360 and / or coupling 2300 are also configured to provide a noticeable click (e.g., a tactile / tactile, acoustic sound perceived by the operator of the measuring device 1000) when the switch 2360 is positioned at a second end position (e.g., a locked position) when the measuring device 1000 is successfully coupled to the control device 2000 and locked in place.

[0085] In the embodiment shown in Figure 3, the mounting means 2320 includes circumferentially arranged radial recesses configured to receive corresponding radially projecting projections of the mounting means 1320 of the measuring device 1000. In some embodiments, the recesses of the mounting means 2320 are provided along the inner circumference of the coupling portion 2300. The distance between adjacent recesses can be configured to restrict the insertion and / or mounting of the measuring device 1000 to only a single position and / or orientation relative to the mounting means 2320 of the control device 2000 in order to prevent inaccurate or improper mounting of the measuring device 1000.

[0086] In some embodiments, the control device 2000 is composed of at least a portion of stainless steel components. This improves the robustness and reliability of the control device 2000 over long periods. This further improves the cleaning and / or maintenance of the control device 2000, for example, when the control device 2000 is cleaned, pre-treated, and / or maintained during its operating period, and / or when one measuring device 1000 is replaced with another measuring device 1000. For example, substantial portions of the coupling 2300, in particular the mounting surface 2310, the switch 2360, the cover 2380, and / or the mounting means 2320, can be composed of at least a portion of stainless steel or stainless steel components.

[0087] The control device 2000 further includes an electronic control unit (ECU) 2200 (not shown in Figure 3) which is configured to be coupled to or connected to components of the measuring device 1000 when the measuring device 1000 is coupled to the control device 2000. The control device 2000 and / or the ECU 2200 are configured to control the measuring device 1000 when the measuring device 1000 is coupled to the control device 2000. For example, the control device 2000 and / or the ECU 2200 are configured to transmit one or more control signals to the measuring device 1000 and / or receive one or more measurement signals from the measuring device 1000 when the measuring device 1000 is coupled to the control device 2000.

[0088] The control unit 2000 and / or ECU 2200 further comprises an electrical connector 2280 configured to establish electrical connections 1480, 2280 when the measuring device 1000 is coupled to the control unit 2000. The electrical connector 2280 is coupled to the control unit 2000 and / or ECU 2200 in a float-mount configuration, thereby allowing the electrical connector 1480 (mounted on the PCB 1400 of the measuring device 1000 coupled to the control unit 2000) to be accepted, making electrical connections 1480, 2280 easier to establish when the measuring device 1000 is coupled to the control unit 2000 (for example, when the electrical connectors 1480, 2280 are not perfectly aligned and / or not precisely aligned).

[0089] The control unit 2000 and / or ECU 2200 have one or more interfaces configured for data communication with one or more other components (e.g., a network computer, another control unit, a data storage device). One or more interfaces may include one or more of the following: PoE (Power over Ethernet), CAN (Controller Area Network) bus, I 2 C (Inter-IC) bus, UART, SPI (Serial Peripheral Interface), analog 4-20mA. The control unit 2000 and / or ECU 2200 may include, but are not limited to, one or more further components, including electrically erasable programmable read-only memory (EEPROM), additional sensors such as temperature, pressure, conductivity, etc., and components configured to control or otherwise communicate with the additional sensors (e.g., components configured to send control signals to the additional sensors and receive measurement signals from the additional sensors).

[0090] In some embodiments, the control device 2000 is connected to the ECU 2200 and includes a status indicator 2210 configured to indicate the operating state of the control device 2000 and / or the operating state of the measuring device 1000 when the measuring device 1000 is coupled to the control device 2000. In some embodiments, the status indicator 2210 includes a light-emitting diode (LED) or similar light-emitting device configured to emit light of different wavelengths and / or one or more light pulses indicating the operating state of the control device 2000 and / or the operating state of the measuring device 1000 when the measuring device 1000 is coupled to the control device 2000. In some embodiments, the operating states indicated by the status indicator 2210 include one or more of the following: operating state or error state of the ECU 2200 (e.g., system startup, system error), operating state or error state of the measuring device 1000 and / or the control device 2000 (e.g., ready to operate, coupling of the measuring device 1000 to the control device 2000, presence of the medium to be measured in the fluid conduit 1200).

[0091] The control device 2000 may further include a cover 2330 (e.g., a flap, a lid) configured to cover at least a portion of the coupling 2300 and / or the mounting surface 2310. In particular, the cover 2330 may be configured to cover the electrical connector 2280 of the control device 2000 when not in use (e.g., when the measuring device 1000 is not coupled to the control device 2000). In some embodiments, the cover 2330 may include a seal 2380 configured to seal the electrical connector 2280 when the cover 2330 is configured to cover at least a portion of the coupling 2300 and / or the mounting surface 2310. The seal may be configured to meet a specific ingress protection (IP) code, such as IPX5, as defined by the International Electrotechnical Commission (IEC) under the international standard IEC 60529 or by the European Union under the European Committee for Electrotechnical Standardization (CENELEC) under EN 60529. The cover 2330 can protect at least a portion of the electrical connector 2280 and / or the coupling 2300 and / or mounting surface 2310 from, for example, contamination, fluids, splashes, dust, or particles. In particular, the cover 2330 can protect at least a portion of the electrical connector 2280 and / or the coupling 2300 and / or mounting surface 2310 during cleaning processes of the control device 2000. In some embodiments, the cover 2330 is implemented as a flap-type or lid-type cover that is rotatably attached to the housing 2100 or the coupling 2300 of the control device 2000. In other embodiments, the cover 2330 may be implemented as a removable cover, for example, in the form of a simple, removably attachable cover plate, or as a "dummy device" coupled to the control device 2000 in the same or similar manner as the measuring device 1000 is coupled to the control device 2000 (for example, having a body without fluid conduits 1200 and / or first and second ends 1210, 1220).Figure 3 shows the device 2000 having a cover 2330 in an open position in which the measuring device 1000 can be coupled to the control device 2000.

[0092] Figure 3A shows a perspective view of a system 100 for measuring fluid flow according to an embodiment of this specification. The system 100 comprises a control device 2000 and a measuring device 1000. In the embodiment shown in Figure 3A, the control device 2000 has a cover 2330, which is shown in an orientation in which the cover is rotatably mounted on the bottom side of the control device 2000. In other embodiments, the cover 2330 can be mounted on the top side of the control device 2000. In the configuration shown in Figure 3A, the measuring device 1000 is coupled to the control device 2000. In some embodiments, when the measuring device 1000 is coupled to the control device 2000, the cover 2330 can assume an engaged position relative to the measuring device 1000. In the engaged position, the cover 2330 engages with the measuring device 1000 such that the cover 2330 is held in place. During operation, a fluid line (not shown in Figure 3A) is connected to the measuring device 1000 of the system 100.

[0093] Figure 4A shows a perspective view of a control device 2000 for measuring fluid flow according to an embodiment of this specification. Figure 4A shows the control device 2000 as described above with respect to Figure 3. As shown in Figure 4A, when the device 1000 is not coupled to the control device 2000, the cover 2330 is in a closed position, covering (e.g., shielding, protecting, and sealing) a portion of the coupling portion 2300 and / or mounting surface 2310 of the control device 2000, in particular the electrical connector 2280 of the control device 2000.

[0094] Figure 4B shows a perspective view of a control device 2000 for measuring fluid flow according to embodiments of this specification. In some embodiments, the control device 2000 includes a display device 2150 configured to provide a user interface 2155. The display device 2150 is configured to display information to an operator of the control device 2000, the measuring device 1000, or the system 100. In some embodiments, the user interface 2155 is configured to perform one or more of the following functions: displaying the current status of the control device 2000, the measuring device 1000, or the system 100; receiving inputs configured to set, modify, and / or adjust the operating parameters of the control device 2000, the measuring device 1000, or the system 100; and displaying measurement data of the control device 2000, the measuring device 1000, or the system 100 (e.g., in the form of individual datasets, one or more time-series datasets, and / or real-time datasets).

[0095] Figure 5 shows a cross-sectional view of a measuring device 1000 for measuring fluid flow according to a first embodiment of this specification. The device 1000 according to the first embodiment includes a PCB 1400, a first ultrasonic transducer 1410, and a second ultrasonic transducer 1420. In this specification, ultrasonic transducers may also be referred to as "ceramic" or "piezoelectric ceramic." The first ultrasonic transducer 1410 and the second ultrasonic transducer 1420 are connected to a first PCB 1416 and a second PCB 1426, respectively. The configuration of ultrasonic transducers 1410 and 1420 having PCBs 1416 and 1426 will be described in more detail below. The first ultrasonic transducer 1410 and the first PCB 1416 form a first transducer module 1411. The second ultrasonic transducer 1420 and the second PCB 1428 form a second transducer module 1421.

[0096] Each of the first ultrasonic transducer 1410 and the second ultrasonic transducer 1420 may contain or be composed of a piezoelectric ceramic material. Generally, the first ultrasonic transducer 1410 and the second ultrasonic transducer 1420 are electroacoustic transducers. Preferably, the first ultrasonic transducer 1410 and the second ultrasonic transducer 1420 have conductive contact surfaces. In some embodiments, the first ultrasonic transducer 1410 and the second ultrasonic transducer 1420 contain lead zirconate-lead titanate ceramics. However, in other embodiments, the first ultrasonic transducer 1410 and the second ultrasonic transducer 1420 may be made from other (ceramic) materials, or may otherwise contain other (ceramic) materials.

[0097] PCB 1400 includes a first connector 1418 and a second connector 1428. The first connector 1418 is configured to receive the first resonator module 1411 and to define the position and orientation of the first resonator module 1411 relative to PCB 1400. The second connector 1418 is configured to receive the second resonator module 1421 and to define the position and orientation of the second resonator module 1421 relative to PCB 1400. The first connector 1418 and the second connector 1428 respectively position and orient the first and second resonator modules 1411 and 1421 substantially perpendicular to PCB 1400. Also, the first and second resonator modules 1411 and 1421 are generally positioned facing each other. In some embodiments, depending on the configuration of the fluid conduit 1200 and the characteristics of the medium to be measured, the first and second oscillator modules 1411 and 1421 are generally arranged offset from each other.

[0098] The acoustic coupling medium 1140 (e.g., a thermoplastic material, particularly epoxy resin) is around the first and second ultrasonic transducers 1410, 1420 and fills the space between each ultrasonic transducer 1410, 1420 and the fluid conduit 1200. In the embodiment shown in Figure 5, the acoustic coupling medium 1140 has a first portion 1141 and a second portion 1142. In some embodiments, the first and second portions 1141, 1142 are connected to each other, for example, on the opposite side of the PCB 1400 from the first and second ultrasonic transducers 1410, 1420. The acoustic coupling medium 1140 is between the first and second ultrasonic transducers 1410, 1420 and includes an acoustic path 1160 (shown by a dashed line) extending through the measurement section 1230 of the fluid conduit 1200. As further described herein, the inner diameter of the measurement section 1230 and / or the fluid conduit 1200 substantially corresponds to the heights of the first and second ultrasonic transducers 1410, 1420. In the embodiment shown in Figure 5, the acoustic path 1160 extends from the first ultrasonic transducer 1410, through the first section 1141, the measurement section 1230, and the second section 1142, to the second ultrasonic transducer 1420.

[0099] The PCB 1400 is positioned relative to the body 1100 of the measuring device 1000 such that the first and second transducer modules 1411 and 1421 are positioned on opposite sides of the fluid conduit 1200, respectively. The first and second ultrasonic transducers 1410 and 1420 are positioned relative to the fluid conduit 1200 at a minimum distance D1, as shown in Figure 5, and the tops of each ultrasonic transducer 1410 and 1420 are positioned at the same level as the maximum distance h from the surface of the PCB 1400 to the inner diameter of the fluid conduit 1200, as shown in Figure 5. Furthermore, the heights of the first and second ultrasonic transducers 1410 and 1420 are selected to correspond to the inner diameter of the fluid conduit 1200. The distance between each ultrasonic transducer 1410 and 1420 and the fluid conduit 1200 may be important for the accuracy of the fluid flow measurement. Generally, the ultrasonic transducers 1410 and 1420 can generate ultrasonic signals, e.g., ultrasound. When ultrasound propagates through a medium, the portion of the ultrasound can be referred to as the near-field and the far-field. In the near-field, ultrasound has characteristics corresponding to a spot emitter, which transmits ultrasound in all directions. As ultrasound travels a certain distance, in the far-field, it begins to exhibit specific wavefront characteristics.

[0100] A far-field is defined as follows:

[0101]

number

[0102] Here, r far field min → Minimum value to the far field A ceramic → Effective permeable area C Sound channel → Speed ​​of sound in an acoustic channel f transmit → Ceramic input frequency

[0103] It is necessary to consider the ultrasonic characteristics and input frequency of the acoustic coupling medium 1140 (for example, an epoxy resin including the acoustic path 1160). The preferred minimum distance D1 between the ultrasonic transducers 1410, 1420 and the fluid conduit 1200 is r far field min found to be at least 50% of:

[0104]

Number

[0105] Here, r ceramic / fuid conduit → The average minimum distance between the ceramic and the fluid conduit A<00^00016>→ The effective emission area of the height and width of the ceramic surface c sound channel → The speed of sound in the acoustic channel f transmit → The input frequency of the ceramic

[0106] In the first embodiment, for example, for an ultrasonic transducer having an effective emission area A of 3 mm × 6 mm ceramic , a speed of sound of 2900 m / s, and an input frequency f of 4.8 MHz transmit , the minimum distance D1 can be determined as follows:

[0107]

Number

[0108] In the operating configuration of the measuring device 1000 and the control device 2000, the ECU 2200 transmits a first control signal to the first ultrasonic transducer 1410. Upon receiving the first control signal from the ECU 2200, the first ultrasonic transducer 1410 is configured to emit an ultrasonic signal. The first control signal is transmitted through electrical connectors 2280 and 1480. The first ultrasonic transducer 1410 guides the emitted ultrasonic signal through the acoustic coupling medium 1140, substantially along the acoustic path 1160, toward the measuring section 1230 of the fluid conduit 1200, and further toward the second ultrasonic transducer 1420. The acoustic coupling medium 1140 is configured to contain a substantially homogeneous thermoplastic material (e.g., epoxy resin) that is free from impurities such as bubbles or particles. The acoustic coupling medium 1140 is configured to conduct ultrasonic signals between the first and second ultrasonic transducers 1410 and 1420 and a medium present in or flowing through the fluid conduit 1200.

[0109] The second ultrasonic transducer 1420 receives the ultrasonic signal emitted by the first ultrasonic transducer 1410 and generates a measurement signal based on the received ultrasonic signal when the emitted ultrasonic signal strikes the medium to be measured in the measurement section 1230. Generally, this applies, for example, to the embodiments shown in Figure 5 and Figure 6, where the emitted ultrasonic signal is directed substantially along the acoustic path 1160 and therefore substantially exclusively through the measurement section 1230 of the fluid conduit 1200. This is achieved in part by configuring the emitted ultrasonic transducer (e.g., ultrasonic transducer 1410) to direct the ultrasonic signal toward the measurement section 1230 (e.g., directly, see Figure 5, or indirectly, see Figure 6). Furthermore, this is further achieved by air backings 1120, 1130 defined by the fluid conduit 1200 and / or the main body 1100. The air backings 1120 and 1130 contain air and are configured to reflect, attenuate, or block ultrasonic signals entering either of the air backings 1120 and 1130 (at the boundary layer between the air backing wall 1125 and the air contained in the air backings 1120 and 1130). The air backing wall 1125 separates the air backings 1120 and 1130 from the acoustic coupling medium 1140. The air backings 1120 and 1130 are configured to attenuate or completely block ultrasonic signals between the first and second ultrasonic transducers 1410 and 1420 that do not move along the acoustic channel 1160. This can improve the measurement resolution and / or measurement accuracy of the measuring device 1000.

[0110] The air backing 1130 and associated air backing wall 1125 are further configured to precisely position the PCB 1400 relative to the fluid conduit 1200. More precise positioning of the PCB 1400 relative to the fluid conduit 1200 results in more precise positioning of the first and second ultrasonic transducers 1410, 1420 relative to the fluid conduit 1200. This can improve the measurement resolution and / or measurement accuracy of the measuring device 1000.

[0111] The acoustic path 1160 represents the path of ultrasonic signals emitted by the first ultrasonic transducer 1410 and received by the second ultrasonic transducer 1420, for example, in the direction of and through the measurement section 1230. As shown in the figure, the first and second ultrasonic transducers 1410, 1420 are configured to have a height substantially corresponding to the height of the fluid conduit 1200. In particular, the first and second ultrasonic transducers 1410, 1420 are configured to have a height substantially corresponding to the inner diameter of the fluid conduit 1200. Also, the first and second ultrasonic transducers 1410, 1420 are configured to have a width such that the aspect ratio of the transducer height to width is 3:2 or greater. By changing the width of the first and second ultrasonic transducers 1410, 1420, the sensitivity of the fluid flow measurement can be adjusted.

[0112] As described above, the resolution and / or accuracy of fluid flow measurement can be improved by substantially directing the emitted ultrasonic signal only through the measurement section 1230 of the fluid conduit 1200.

[0113] Figure 5A shows a perspective front view and a perspective rear view of transducer modules 1411, 1421 according to embodiments of this specification. The left side of Figure 5A shows a perspective front view of the transducer modules (e.g., 1411, 1421). The right side of Figure 5A shows a perspective rear view of the transducer modules (e.g., 1411, 1421). The transducer module includes ultrasonic transducers (e.g., 1410, 1420), transducer PCBs (e.g., 1416, 1426), and a pair of contacts (e.g., 1415, 1425). The pair of contacts is configured to electrically connect the transducer module to the corresponding connectors (e.g., 1418, 1428) on PCB 1400. Each contact of the pair of contacts is further configured to electrically connect to the respective electrode of the respective ultrasonic transducer in order to achieve an electrical connection between the respective electrode and the conductive path on PCB 1400.

[0114] Figure 5B shows a perspective view of transducer modules 1411 and 1421 arranged on a PCB 1400 according to an embodiment described herein. A first connector 1418 is configured to receive the first transducer module 1411 and define the position and orientation of the first transducer module 1411 relative to the PCB 1400. A second connector 1418 is configured to receive the second transducer module 1421 and define the position and orientation of the second transducer module 1421 relative to the PCB 1400. The first connector 1418 and the second connector 1428 position and orient the first and second transducer modules 1411 and 1421 substantially perpendicular to the PCB 1400 (for example, at an angle of 90° with respect to the plane of the PCB 1400), respectively. Furthermore, the first and second connectors 1418 and 1428 position the first and second ultrasonic transducers 1410 and 1420 perpendicular to the plane of the PCB 1400, such that the tops of the first and second ultrasonic transducers 1410 and 1420 are at the same distance h from the surface of the PCB 1400. The distance h is configured to correspond to the maximum distance h of the inner diameter of the fluid conduit 1200 from the PCB 1400, as shown in Figure 5.

[0115] Figure 5C shows a top view of connectors 1418, 1428 arranged on a PCB 1400 and configured to receive oscillator modules 1411, 1421, according to embodiments of this specification. The first and second oscillator modules 1411 and 1421 are generally arranged facing each other. In some embodiments, depending on the characteristics of the medium to be measured, the first and second oscillator modules 1411 and 1421 are generally arranged facing each other with an offset determined, for example, based on the Snell-Cartes law.

[0116] Figure 6 shows a cross-sectional view of a measuring device 1000 for measuring fluid flow according to a second embodiment of this specification. The device 1000 according to the second embodiment includes a PCB 1400, a first ultrasonic transducer 1410, and a second ultrasonic transducer 1420. The first ultrasonic transducer 1410 and the second ultrasonic transducer 1420 are directly connected to the PCB 1400.

[0117] Each of the first ultrasonic transducer 1410 and the second ultrasonic transducer 1420 may include or be composed of a piezoelectric ceramic material, as described above with respect to the first embodiment.

[0118] PCB1400 defines the positions of the first ultrasonic transducer 1410 and the second ultrasonic transducer 1420 with respect to the acoustic coupling medium 1140, the reflective surface 1145, and the fluid conduit 1200. The first and second ultrasonic transducers 1410 and 1420 are generally positioned opposite their respective reflective surfaces 1145 and the fluid conduit 1200, taking reflection into account. Generally, reflection is defined by the boundary layer of the reflective surface 1145 and the air backing on the side of the reflective surface 1145 opposite to the acoustic coupling medium 1140 and the first or second ultrasonic transducer 1410, 1420. As described above with respect to the air backings 1120, 1130, the reflective surface 1145 or the air behind it reflects the ultrasonic signal emitted by the first or second ultrasonic transducer 1410, 1420 (at the boundary layer between the air and the reflective surface 1145) so that substantially the entire ultrasonic signal is reflected through the measurement section 1230 in the direction of the measurement section 1230.

[0119] The acoustic coupling medium 1140 is around the first and second ultrasonic transducers 1410, 1420 and fills the space between each ultrasonic transducer 1410, 1420 and the fluid conduit 1200. In the embodiment shown in Figure 6, the acoustic coupling medium 1140 has a first portion 1141 and a second portion 1142. In some embodiments, the first and second portions 1141, 1142 are connected to each other, for example, on the opposite side of the PCB 1400 from the first and second ultrasonic transducers 1410, 1420. The acoustic coupling medium 1140 is between the first and second ultrasonic transducers 1410, 1420 and includes an acoustic path 1160 (shown by a dashed line) extending through the measurement section 1230 of the fluid conduit 1200. As further described herein, the inner diameter of the measurement section 1230 and / or the fluid conduit 1200 substantially corresponds to the heights of the first and second ultrasonic transducers 1410, 1420 (the heights of the first and second ultrasonic transducers 1410, 1420 are measured along a plane parallel to the surface of the PCB 1400 on which the first and second ultrasonic transducers 1410, 1420 are mounted). In the embodiment shown in Figure 6, the acoustic path 1160 extends from the first ultrasonic transducer 1410, through the first section 1141 to the reflecting surface 1145, further through the first section 1141, the measurement section 1230, and the second section 1142 to the reflecting surface 1145, and further through the second section 1142 to the second ultrasonic transducer 1420. In the embodiment shown in Figure 6, the reflecting surface 1145 reflects the acoustic path 1160 twice at a substantially 90° angle. Each reflective surface 1145 is positioned at a substantially 45° angle with respect to the plane of the PCB 1400 and / or the plane on which the first and second ultrasonic transducers 1410, 1420 are mounted on the PCB 1400.

[0120] In some embodiments, depending on the characteristics of the medium to be measured, the first and second ultrasonic transducers 1410 and 1420 are generally positioned opposite each other with an offset determined, for example, based on the Snell-Cartes law.

[0121] The PCB1400 is positioned relative to the body 1100 of the measuring device 1000 such that the first and second ultrasonic transducers 1410 and 1420 are positioned on opposite sides of the fluid conduit 1200. The first and second ultrasonic transducers 1410 and 1420 are also positioned relative to the respective reflective surfaces 1145 at a minimum distance D1, as shown in Figure 6. The distance between each ultrasonic transducer 1410, 1420 and each reflective surface may be important for the accuracy of the fluid flow measurement. Generally, the same principle of ultrasonic propagation described above for the first embodiment applies to the second embodiment.

[0122] For the second embodiment, equation (2) is applied, where distance D1 is the distance between each ultrasonic transducer and each reflecting surface:

[0123]

number

[0124] Here, r ceramic / reflection surface → Average minimum distance between ceramic and reflective surface A ceramic → Effective radiant area of ​​the height and width of the ceramic surface c sound channel → Speed ​​of sound in an acoustic channel f transmit → Ceramic input frequency

[0125] In the first embodiment, for example, the effective emission area A is 3 mm × 6 mm. ceramic , speed of sound 2900 m / s, and input frequency f 4.8 MHz transmit For an ultrasonic transducer having the following characteristics, the minimum distance D1 can be determined as follows:

[0126]

number

[0127] In the operating configuration of the measuring device 1000 and the control device 2000, the ECU 2200 transmits a first control signal to the first ultrasonic transducer 1410. Upon receiving the first control signal from the ECU 2200, the first ultrasonic transducer 1410 is configured to emit an ultrasonic signal. The first control signal is transmitted through electrical connectors 2280 and 1480. The first ultrasonic transducer 1410 directs the emitted ultrasonic signal through the acoustic coupling medium 1140, substantially along the acoustic path 1160, toward the measuring section 1230 of the fluid conduit 1200, and further toward the second ultrasonic transducer 1420.

[0128] The second ultrasonic transducer 1420 receives the ultrasonic signal emitted by the first ultrasonic transducer 1410 and generates a measurement signal based on the received ultrasonic signal when the emitted ultrasonic signal strikes the medium to be measured in the measurement section 1230. Similar to what is described above with respect to Figure 5, the emitted ultrasonic signal is directed substantially along the acoustic path 1160 and therefore substantially exclusively through the measurement section 1230 of the fluid conduit 1200. In the embodiment shown in Figure 6, the ultrasonic signal is reflected twice by each boundary layer formed by the reflecting surface 1145, each reflecting surface 1145 forming an angle of about 45° with respect to the plane in which the ultrasonic transducer is positioned (for example, substantially parallel to the plane of the PCB 1400 as shown in Figure 6).

[0129] This is achieved in part by configuring the emitting ultrasonic transducer (e.g., ultrasonic transducer 1410) to direct the ultrasonic signal towards the measurement section 1230 based on the reflection at the first reflective surface 1145. The ultrasonic signal is further directed towards the second ultrasonic transducer 1420, which is configured to receive the ultrasonic signal and generate a measurement signal based on the received ultrasonic signal, based on the second reflection at the second reflective surface 1145. The measurement of the fluid flow through the fluid conduit 1200 is based on the difference in characteristics between the emitted ultrasonic signal and the received ultrasonic signal. These ultrasonic signals are caused by characteristics of the medium present in or flowing through the fluid conduit 1200.

[0130] The acoustic path 1160, as shown in Figure 6, represents the path of an ultrasonic signal emitted by the first ultrasonic transducer 1410 and received by the second ultrasonic transducer 1420, for example, in the direction of the first reflecting surface 1145, through the measurement section 1230, in the direction of the second reflecting surface 1145, and further in the direction of the second ultrasonic transducer 1420. As shown in the figure, the first and second ultrasonic transducers 1410 and 1420 are configured to have a height substantially corresponding to the height of the fluid conduit 1200. In particular, the first and second ultrasonic transducers 1410 and 1420 are configured to have a height substantially corresponding to the inner diameter of the fluid conduit 1200. Also, the first and second ultrasonic transducers 1410 and 1420 are configured to have a width such that the aspect ratio of the transducer height to width is 3:2 or greater. The sensitivity of the fluid flow measurement can be adjusted by changing the width of the first and second ultrasonic transducers 1410 and 1420.

[0131] As described above, the resolution and / or accuracy of fluid flow measurement can be improved by substantially directing the emitted ultrasonic signal only through the measurement section 1230 of the fluid conduit 1200.

[0132] Figure 7 shows a cross-sectional view of a measuring device 1000 and a control device 2000 for measuring fluid flow according to the first embodiment of this specification, showing a second modification of the electrical connections 1480', 2280'. According to the first modification of the electrical connections 1480', 2280' as described herein, the electrical connectors 1480 and 2280 are mechanically connected to realize the electrical connections 1480', 2280 when the measuring device 1000 is coupled to the control device 2000. According to the second modification of the electrical connections, the inductive electrical connections 1480', 2280' are made based on an inductive connection between the ultrasonic transducer of the measuring device 1000 (e.g., transducers 1410, 1420 or modules 1411, 1421) and the control device 2000 (e.g., ECU 2200). This makes it possible to reduce or prevent problems (e.g., mechanical, electrical, wear, and / or breakage) related to the connection of electrical connectors 1480, 2280 (e.g., plugs and sockets, male and female connectors).

[0133] Inductive electrical connections 1480' and 2280' can be established using, for example, the electrical connector 1480' of the measuring device 1000 and the electrical connector 2280' of the control device 2000, as shown in Figure 7. The electrical connector 1480' of the measuring device 1000 includes a first coil 1481' and a second coil 1482', and optionally a third coil 1483'. The first coil 1481' and the second coil 1482', and optionally the third coil 1483' are connected to the PCB 1400 of the measuring device 1000. Configurations using the respective third coils 1483' and 2283' are described below with reference to Figure 11. The corresponding electrical connections between components connected to the PCB 1400 are realized as conductive paths defined by the PCB 1400. The electrical connector 2280' of the control device 2000 includes a first coil 2281' and a second coil 2282', and optionally a third coil 2283'. The first ultrasonic transducer 1410 (or module 1411) is electrically connected to the first coil 1481' of the measuring device 1000, and the second ultrasonic transducer 1420 (or module 1421) is electrically connected to the second coil 1482' of the measuring device 1000. The first coil 2281' and the second coil 2282' of the control device 2000 are electrically connected to the ECU 2200 (not shown in Figure 7).

[0134] The first and second ultrasonic transducers 1410 and 1420 are configured to operate based on a sinusoidal AC voltage. For example, one ultrasonic transducer (e.g., one of the ultrasonic transducers 1410 and 1420) may be configured to transmit an ultrasonic signal in response to receiving an (input) control signal (e.g., in the form of a sinusoidal AC voltage). The control signal may be adapted to achieve a desired ultrasonic signal emitted from the ultrasonic transducer. Alternatively, one ultrasonic transducer (e.g., the one of the ultrasonic transducers 1410 and 1420 that is not emitting an ultrasonic signal) may be configured to generate an (output) measurement signal (e.g., in the form of a sinusoidal AC voltage) in response to receiving an ultrasonic signal (e.g., an ultrasonic signal emitted from the other ultrasonic transducer).

[0135] In some embodiments, inductive connections (e.g., 1480', 2280'; 1480'', 2280'') are configured not to extend the phase of the transmitted and received (raw) ultrasonic signals. Furthermore, inductive electrical connections must not exceed a 10 dB attenuation.

[0136] When the measuring device 1000 is coupled to the control device 2000, the first coil 1481' of the measuring device 1000 is positioned relative to the coupling portion 1300 of the measuring device 1000, and the first coil 2281' of the control device 2000 is positioned relative to the coupling portion 2300 of the control device 2000, so that the first coils 1481' and 2281' are in close proximity to each other. When the measuring device 1000 is coupled to the control device 2000, the second coil 1482' of the measuring device 1000 is positioned relative to the coupling portion 1300 of the measuring device 1000, and the second coil 2282' of the control device 2000 is positioned relative to the coupling portion 2300 of the control device 2000, so that the second coils 1482' and 2282' are in close proximity to each other.

[0137] In some embodiments, the first and second coils 1481', 2281', 1482', and 2282' of the measuring device 1000 and the control device 2000 have a diameter of 3 to 10 mm, preferably 3 mm, and are arranged at a distance of 3 to 10 mm, preferably 3 mm from each other (for example, a pair of coils 1481' and 2281', and coils 1482' and 2282').

[0138] In some embodiments, the distance between two coils in each corresponding pair of coils (see, for example, coils 1481'', 2281''; coils 1482'', 2280'' in Figures 7 and 8; and optionally, coils 1483'', 2283'' in Figures 9 and 11; and optionally, coils 1481'', 2281''; coils 1482'', 2280''; and optionally, coils 1483'', 2283'') does not exceed a maximum distance of 5 mm. In preferred embodiments, the distance is in the range of 3 to 5 mm, and more preferably, the distance is less than 3 mm. The preferred number of windings depends in part on the desired frequency emitted by the emitted ultrasonic transducer. Generally, the coil characteristics (e.g., conductor material, conductor thickness, number of windings, etc.) can be adapted to individual applications. In some embodiments, the characteristics of corresponding coil pairs (e.g., coils 1481', 2281'; coils 1482', 2280'; coils 1483', 2283'; coils 1481'', 2281''; coils 1482'', 2280''; coils 1483'', 2283'') are consistent with each other, but the characteristics of any one pair of coils may differ from those of another pair of coils.

[0139] Figure 8 shows the electrical circuit diagrams of the electrical connections 1480', 2280' of a measuring device 1000 and a control device 2000 for measuring fluid flow according to a first embodiment of this specification. The inductive electrical connections 1480', 2280' are established using the electrical connector 1480' of the measuring device 1000 and the electrical connector 2280' of the control device 2000. Although not shown in Figure 8, it is understood that the measuring device 1000 includes the electrical connector 1480' and the control device 2000 includes the electrical connector 2280'. Generally, as an exemplary configuration, Figure 8 shows the transmitting circuits 2001', 1001' on the left side of the figure and the receiving circuits 1002', 2002' on the right side of the figure. The example shown in Figure 8 is not intended to limit embodiments or modifications with respect to alternative configurations (e.g., switching the configuration of the components on each side).

[0140] The electrical connector 1480' of the measuring device 1000 includes a first coil 1481' and a second coil 1482'. An optional third coil 1483' is not shown in Figure 8. The electrical connector 2280' of the control device 2000 includes a first coil 2281' and a second coil 2282'. An optional third coil 2283' is not shown in Figure 8. The first ultrasonic transducer 1410 (or transducer module 1411) is electrically connected to the first coil 1481' of the measuring device 1000, and the second ultrasonic transducer 1420 (or module 1421) is electrically connected to the second coil 1482' of the measuring device 1000. The first coil 2281' and the second coil 2282' of the control device 2000 are electrically connected to the ECU 2200 (not shown in Figure 8). The electrical circuit implemented by the ECU 2200 of the control unit 2000 further includes an input 2251' and an amplifier 2241' for a signal-emitting transducer (e.g., an ultrasonic transducer 1410 or transducer module 1411). The amplifier 2241' is configured to amplify the input signal sent to the coil 2281'. The electrical circuit implemented by the ECU 2200 of the control unit 2000 further includes an output 2252' and an amplifier 2242' for a signal-generating transducer (e.g., an ultrasonic transducer 1420 or transducer module 1421). The amplifier 2242' is configured to amplify the output signal sent from the coil 2282'.

[0141] Figure 9 shows a cross-sectional view of a measuring device 1000 and a control device 2000 for measuring fluid flow according to the first embodiment of this specification, illustrating a third modification of the electrical connections 1480”, 2280”. According to the third modification of the electrical connections, the inductive electrical connections 1480”, 2280”, are based on an inductive connection between the ultrasonic transducers (e.g., transducers 1410, 1420 or modules 1411, 1421) of the measuring device 1000 and the control device 2000 (e.g., ECU 2200). This reduces or prevents problems (e.g., mechanical, electrical, wear, and / or breakage) related to the connection of the electrical connectors 1480”, 2280 (e.g., plugs and sockets, male and female connectors).

[0142] The inductive electrical connections 1480" and 2280" are established using the electrical connector 1480" of the measuring device 1000 and the electrical connector 2280" of the control device 2000, for example, as shown in Figure 9. The electrical connector 1480" of the measuring device 1000 includes a first coil 1481" and a second coil 1482" and optionally a third coil 1483". The first coil 1481" and the second coil 1482" and optionally the third coil 1483" are connected to the coupling 1300 and / or body 1100 of the measuring device 1000. Configurations using the respective third coils 1483" and 2283" are described below with reference to Figure 11.

[0143] According to a third modification of the electrical connections 1480" and 2280", PCB 1400 is not required to realize electrical connections between components. The first coil 1481" and the first ultrasonic transducer 1410 are electrically connected to each other by the first PCB 1416" to form a first transducer module 1411" including the first ultrasonic transducer 1410, the first PCB 1416" and the first coil 1481". The second coil 1482" and the second ultrasonic transducer 1420 are electrically connected to each other by the second PCB 1426" to form a second transducer module 1421" including the second ultrasonic transducer 1420, the second PCB 1426" and the second coil 1482". The corresponding electrical connections between components connected to the first and second PCBs 1416" and 1426" are each realized as conductive paths defined by their respective PCBs. The electrical connector 2280" of the control device 2000 includes a first coil 2281" and a second coil 2282" and optionally a third coil 2283".

[0144] The first and second ultrasonic transducers 1410, 1420 are configured to operate on a sinusoidal AC voltage, as described above with respect to Figure 7. The electrical connections 1480”, 2280”, relating to the third modification, operate in the same manner as described above with respect to the second modification, and, unless otherwise specified, in the same manner as described above with respect to the first modification.

[0145] When the measuring device 1000 is coupled to the control device 2000, the first coil 1481" of the measuring device 1000 is positioned relative to the coupling portion 1300 of the measuring device 1000, and the first coil 2281" of the control device 2000 is positioned relative to the coupling portion 2300 of the control device 2000, so that the first coils 1481" and 2281" are in close proximity to each other. When the measuring device 1000 is coupled to the control device 2000, the second coil 1482" of the measuring device 1000 is positioned relative to the coupling portion 1300 of the measuring device 1000, and the second coil 2282" of the control device 2000 is positioned relative to the coupling portion 2300 of the control device 2000, so that the second coils 1482" and 2282" are in close proximity to each other. In some embodiments, the first and second coils 1481”, 2281”, 1482”, 2282”, of the measuring device 1000 and the control device 2000 have a diameter of 3 to 10 mm, preferably 5 mm, and are arranged at a distance of 2 to 10 mm, preferably 5 mm from each other (for example, a pair of coils 1481”, 2281”, and coils 1482”, 2282”).

[0146] In some embodiments, the measuring device 1000 includes electrical connections (e.g., 1480, 2280; 1480', 2280'; 1480”, 2280”) depending on any one of the first, second, and third modifications described herein. In some embodiments, the control device 2000 is configured to support any one of the electrical connections (e.g., 1480, 2280; 1480', 2280'; 1480”, 2280”) or a combination of two or more electrical connections (e.g., 1480, 2280; 1480', 2280'; 1480”, 2280”) depending on the first, second, and third modifications described herein.

[0147] Figure 10 shows an electrical circuit diagram of an electrical circuit for detecting a measuring device 1000 according to an embodiment of this specification. Generally, the control device 2000 is configured to detect the presence of the measuring device 1000 when the measuring device 1000 is coupled to the control device 2000. Alternatively, the control device 2000 may be configured to detect the configuration or type of the measuring device 1000 when the measuring device 1000 is coupled to the control device 2000. This can be realized based on an electrical circuit, for example, as shown in Figure 10 or Figure 11.

[0148] Figure 10 shows the electrical circuit implemented by the ECU 2200 of the control device 2000 and the PCB 1400 of the measuring device 1000. The electrical circuit uses electrical connections 1480, 2280 according to the first modification, and resistor 1484 ("R Sensor Based on the above, the presence, configuration, and / or type of the measuring device is configured to be detected. The electrical circuit can be configured to implement resistance detection based on the "Wheatstone bridge". In one embodiment, resistors R1, R2, and R3 are constants, and resistor 1484 (R Sensor ) is variable. Each modified example of the measuring device 1000, i.e., a measuring device having different characteristics (for example, having fluid conduits 1200 of different diameters), is a resistor 1484 (R) having a selected or predetermined resistance value. Sensor It can be constructed using ). The given resistance can be between 1 and 200 kΩ and / or can be set so that the generated measured voltage resulting from different resistances can be reliably determined. Voltage U variable This can be calculated based on the following formula:

[0149]

number

[0150] Resistor 1484 (R Sensor ) Depending on the voltage U variableThis is set. Using this circuit, each variation of the measuring device 1000 can be determined. This allows the control device 2000 to adjust the operating parameters for each measuring device 1000 coupled to the control device 2000 by selecting the corresponding configuration and / or setting the corresponding operating parameters. The circuit shown in Figure 10 is configured to operate using a DC voltage.

[0151] Figure 11 shows an electrical circuit diagram of an electrical circuit for detecting a measuring device 1000 according to an embodiment of this specification. The electrical circuit shown in Figure 11 is configured to detect the presence, configuration, and / or type of a measuring device using inductive electrical connections (1480', 2280' or 1480'', 2280") according to a second or third modification described herein. Figure 11 shows the operating principle based on the second modification 1480', 2280'. However, the circuit may also be implemented using a third modification 1480'', 2280'' of the electrical connections as described herein. The third coils 1483' and 2283' described in the following paragraphs are understood to be applicable to the first and second coils 1483'' and 2283'' of the third modification of the electrical connections 1480'', 2280'' as described herein.

[0152] The detection is based on resistor 1484' ("R5"). The electrical circuit can also be configured to implement resistance detection based on a "Wheatstone bridge" as described above with respect to Figure 10. Resistors 2284' (R2) and 1484' (R5) are each part of an electrical oscillator circuit. The oscillator circuit on the control device 2000 side, having coil L2, resistor 2284' (R2), and capacitor C2, is constant. The oscillator circuit on the measuring device 1000 side (see coil L5, resistor 1484' (R5), and capacitor C5) is variable. Coils 2283' (L4) and 1483' (L5) are single coils, but when the measuring device 1000 is coupled to the control device 2000, they are positioned close to each other to form a transformer. Due to the presence of the oscillator circuit of the measuring device 1000, when the connected load changes, when coupled to the control device 2000, the voltage 2285' (U variable ) also changes. This can be detected by the ECU 2200 of the control unit 2000, thereby allowing the control unit 2000 to adjust the operating parameters for each measuring device 1000 coupled to the control unit 2000 by selecting the corresponding configuration and / or setting the corresponding operating parameters. The circuit shown in Figure 11 is configured to operate using AC voltage.

[0153] Figure 12A shows a bottom view of a measuring device 1000 for measuring fluid flow according to an embodiment of this specification. The measuring device 1000 as shown in Figure 12A comprises inductive electrical connections 1480', 2280' (or, instead, inductive electrical connections 1480'', 2280''). The PCB 1400 includes first and second ultrasonic transducers 1410, 1420 (not shown in Figure 12A) and their associated coils 1481', 1482', respectively. In some embodiments, the coils 1481', 1482' are located on a first side of the PCB 1400 (for example, the first side of the PCB 1400 facing the coupling portion 2300 of the control device 2000 when the measuring device 1000 is coupled to the control device 2000), and the first and second transducers 1410, 1420 are located on a second side of the PCB 1400 opposite the first side. As shown in Figure 12A, coils 1481' and 1482' (and optionally coil 1483') are spaced apart from each other so that the inductive signals do not interfere with adjacent coils and / or pairs of coils (see, for example, coils 1481', 2281'; coils 1482', 2280' in Figures 7 and 8; and optionally coils 1483', 2283'; and optionally coils 1481'', 2281''; coils 1482'', 2280'' in Figures 9 and 11; and optionally coils 1483'', 2283'').

[0154] Figure 12B shows a perspective view of a control device 2000 for measuring fluid flow according to an embodiment of this specification. The control device 2000 as shown in Figure 12B comprises inductive electrical connections 1480', 2280' (or, instead, inductive electrical connections 1480'', 2280”). The coupling 2300 of the control device 2000 includes the respective coils 2281', 2282'. In some embodiments, the coils 2281', 2282' are generally positioned on the mounting surface 2310 facing the coupling 1300 of the measuring device 1000 when the measuring device 1000 is coupled to the control device 2000. However, the coils 2281', 2282' can be positioned at various locations on or within the coupling 2300 of the control device 2000, insofar as the respective coils can be positioned in close proximity to the corresponding coils of the measuring device 1000. As shown in Figure 12B, coils 2281' and 2282' (and optionally, coil 2283') are spaced apart from each other so that the inductive signals do not interfere with adjacent coils and / or pairs of coils (see, for example, coils 1481', 2281'; coils 1482', 2280'; and optionally, coils 1483', 2283' in Figures 7 and 8, and also coils 1481'', 2281''; coils 1482'', 2280''; and optionally, coils 1483'', 2283 in Figures 9 and 11).

[0155] In some embodiments, the control device 2000 and / or the coupling 2300 are made of at least partially stainless steel components. Such components may prevent or interfere with inductive electrical connections as described herein. In such embodiments, when the control device 2000 implements either the inductive electrical connection 2280' or 2280”, each portion of the coupling 2300 and / or mounting surface 2310 made of stainless steel may be configured to include portions made of a material that does not prevent or interfere with inductive coupling as described herein. In some embodiments, the material may include thermoplastic materials, such as epoxy resins.

[0156] Some embodiments of system 100 may implement hybrid configurations of components from first, second, and third variations of the electrical connection (e.g., 1480, 2280; 1480', 2280'; 1480'', 2280”). For example, the control device 2000 of system 100 may be configured to provide both the electrical connection 2280 (e.g., based on male / female or plug / socket type electrical connectors as described herein) and the inductive electrical connection 2280' or 2280'' (e.g., based on inductive coupling of each coil pair as described herein). Such a “hybrid” control device 2000 is configured to accept a measuring device 1000 that implements either the electrical connection 1480 (e.g., based on male / female or plug / socket type electrical connectors as described herein) or the inductive electrical connection 1480' or 1480'' (e.g., based on inductive coupling of each coil pair as described herein).

[0157] Figure 13 shows a process for determining a pair of ultrasonic transducers to be used according to embodiments of this specification. The first and second ultrasonic transducers 1410, 1420, to be used as a pair of transducers in the measuring device 1000, are selected to have characteristics that are aligned or matched with each other. This can substantially increase the resolution and / or accuracy of the measurements performed in the measuring device 1000. The characteristics of the transducers (e.g., ceramic) are determined based on their size and angle (or phase), as shown in the diagram of Figure 13. Based on the phase diagram, the maximum angle is detected (see the lower diagram of Figure 13), and the corresponding frequency is determined. The determined frequency (i.e., "input frequency") indicates the optimal frequency at which the transducer operates. In the size diagram (see the upper diagram of Figure 13), the size of the transducer is determined by the anti-resonance frequency, the resonance frequency, and the input frequency. For the selection of a pair of transducers, the determined characteristics are evaluated, and the transducers are sorted accordingly. Transducers having the same acoustic characteristics are then selected for use in the manufacture of the measuring device 1000.

[0158] Figure 14 is a flowchart of an exemplary process 1500 for manufacturing a measuring device 1000 according to embodiments of this specification. Epoxy resin processing is generally a very complex process because material properties can be affected by environmental influences. With respect to process 1500, and in particular with respect to casting, several embodiments are considered.

[0159] In some embodiments, the epoxy resin used for casting comprises a two-component epoxy including a resin and a curing agent. During the mixing of the epoxy resin, a specific mixing ratio must be observed according to the manufacturing instructions for each material used. Even slight changes in the mixing ratio can lead to undesirable changes in the material properties of the epoxy resin, and therefore to changes in the ultrasonic properties of the epoxy resin forming the acoustic coupling medium 1140. For this reason, the epoxy resin is mixed in a mixing / casting apparatus under defined processing and processing conditions. The surface of the object to be cast must be free of grease and oil. High-temperature plastics such as PPSU, PSU, and PES have relatively low surface tension, which can cause problems with epoxy resin adhesion. Therefore, it is desirable to activate the surface of the plastic, for example, using cold plasma treatment. The epoxy resin is preferably low viscosity so that the acoustic path 1160 can be molded as bubble-free as possible. If the viscosity of the epoxy resin is high, air pockets may form in the acoustic path 1160, and are likely to form. This can lead to undesirable and / or uncontrolled deflection of the ultrasonic signal. Even with low-viscosity epoxy resins, air pockets can form within the acoustic bonding medium 1140 and / or acoustic pathway 1160. Therefore, it is highly desirable to allow any enclosed air to escape from the acoustic bonding medium 1140 and / or acoustic pathway 1160. Constructively, this can be done through openings and / or slots within the PCB 1400. Very small bubbles (e.g., having a diameter of less than 1 mm) can occur, particularly on metal surfaces such as ceramics (e.g., ultrasonic transducers 1410, 1420). Such bubbles, as with air backing, can result in undesirable and / or uncontrolled deflection of the ultrasonic signal and should therefore be avoided as much as possible. After casting, the pressure is raised again to atmospheric pressure. Curing is then carried out at a constant temperature.

[0160] Process 1500 begins at step 1502. If process 1500 includes an optional step 1504, the process continues at step 1504; otherwise, the process continues at step 1506.

[0161] In an optional step 1504, the first and second ultrasonic transducers 1410, 1420 or the first and second transducer modules 1411, 1421 are positioned relative to the PCB 1400. In step 1504, depending on the embodiment (e.g., one of the first and second embodiments described herein), either the first and second transducer modules 1411, 1421 are positioned relative to the PCB 1400 (e.g., inserted into connectors 1418, 1428; see Figures 5 and 5B), or the first and second ultrasonic transducers 1410, 1420 are electrically and mechanically connected to the PCB 1400 (e.g., as shown in Figure 6). The body 1100 is configured to have different recesses that form a casting cavity for the acoustic coupling medium 1140, depending on the respective embodiment (e.g., with or without a reflective surface 1145; see Figures 5 and 6).

[0162] In step 1506, the inner surface of the body 1100 is prepared by, for example, activating the plastic surface surrounding the acoustic coupling medium 1140 using cold plasma treatment. Step 1506 may further include examining the inner surface of the body 1100 to define the casting cavity for the acoustic coupling medium 1140 and / or acoustic pathways 1160 for contamination such as oil and grease, and / or additional de-idding or cleaning steps.

[0163] In step 1508, the PCB 1400 is positioned relative to the body 1100. The body 1100 is provided with structural features (e.g., one or more grooves, notches, bars, pins, abutments) that enable the precise positioning of the PCB 1400 and, therefore, the ultrasonic transducers 1410 and 1420 relative to the fluid conduit 1200.

[0164] In step 1510, casting is performed. To reduce the number and / or presence of bubbles, or to completely prevent bubble formation, the casting process is carried out under vacuum. During curing, the epoxy resin shrinks by up to 15%. Therefore, the encapsulated volume covered by the acoustic bonding medium 1140 is at least 30% larger than the encapsulated volume of the acoustic path 1160 to ensure that the possibility of bubble or reservoir formation in the acoustic path 1160 is reduced or eliminated. In some embodiments, the PCB 1400 is provided with one or more openings that allow the epoxy resin to flow into the epoxy resin casting cavity as it shrinks during casting and / or curing. This can reduce or completely prevent mechanical deformation of the PCB 1400 and / or other components caused by the shrinkage of the epoxy resin. Mechanical deformation can adversely affect the resolution and / or accuracy of subsequent measurements made using the measuring device 1000.

[0165] In step 1512, curing is carried out under controlled conditions defined, for example, by temperature and relative humidity profiles. Process 1500 is completed in step 1520.

[0166] Figure 15 shows a cross-sectional view of a measuring device 1000 for measuring fluid flow according to a first embodiment of this specification. In some embodiments, the PCB 1400 includes an opening 1490. As the casting and curing of the epoxy resin is performed as described herein, the resin is prone to shrinkage. The opening 1490 helps to allow further inflow of resin into the cavity so that the resin can substantially occupy the entire cavity (for example, the first and second portions 1141 and 1142 of the acoustic coupling medium 1140 as shown in Figure 5). The opening 1490 is located at a distance D2 which is substantially half of the distance D1, i.e., substantially half of the distance between each ultrasonic transducer 1410, 1420 and the measuring section 1230 of the fluid conduit 1200:

[0167]

number

[0168] The distance D2 (i.e., r) is substantially half the distance between each ultrasonic transducer 1410, 1420 and the measurement section 1230 of the fluid conduit 1200. ceramic / opening By positioning the opening 1490 in the ), the precise positioning and / or orientation of the ultrasonic transducers 1410 and 1420 can be prevented from being adversely affected by forces such as those exerted by the shrinkage of the epoxy resin during casting and / or curing, thereby enabling a uniform and unrestricted inflow of the resin during casting and / or curing.

[0169] To provide interaction with a user, the subject matter described herein can be implemented on one or more computers (e.g., ECU 2100) configured to have or communicate with a display device for displaying information to the user (e.g., 2150 as shown in Figure 4B), such as an LCD (liquid crystal display) monitor, and an input device to which the user can provide input to the computer, such as a user interface 2155 (see, for example, Figure 4B), a keyboard, and a pointing device, such as a mouse, trackball, or touchpad, such as a touch display 2150. Interaction with the user can also be provided using other types of devices, for example, the feedback and responses provided to the user can be any form of sensory feedback, such as visual, auditory, voice, or tactile, and input from the user can be received in any form, including acoustic, voice, or tactile input, including touch movements or gestures, motor movements or gestures, or directional movements or gestures.

[0170] This specification uses the term “configured to” in relation to systems, devices, and computer program components. A system of one or more computers being configured to perform a particular operation or action means that software, firmware, hardware, or a combination thereof is installed on the system that causes the system to perform the operation or action during operation. A system of one or more computer programs being configured to perform a particular operation or action means that the program contains instructions that, when executed by a data processing device, cause the device to perform the operation or action. A logic circuit for a special purpose being configured to perform a particular operation or action means that the circuit has electronic logic that performs the operation or action.

[0171] While this specification includes many specific details of implementation, these should not be interpreted as limitations on the claimed scope as defined by the claims themselves, but rather as descriptions of features specific to particular embodiments of a particular invention. Certain features described herein in the context of separate embodiments can also be implemented in combination in a single embodiment. Conversely, various features described in the context of a single embodiment can also be implemented separately in multiple embodiments or in any suitable subcombination. Furthermore, features are described above as acting in a particular combination, and may even be initially claimed as such, but one or more features from the claimed combination may, in some cases, be excluded from the combination, and the claims may be directed to subcombinations or variations of subcombinations.

[0172] Similarly, while the drawings and claims describe operations in a specific order, this should not be understood as requiring that such operations be performed in a specific illustrated or sequential order, or that all illustrated operations be performed, in order to obtain the desired results. In certain situations, multitasking and parallel processing may be advantageous. Furthermore, the separation of various system modules and components in the embodiments described above should not be understood as requiring such separation in all embodiments, and it should be understood that the described program components and systems can generally be integrated together in a single software product or packaged into multiple software products.

[0173] Specific embodiments of the subject matter have been described. Other embodiments are within the scope of the following claims. For example, the operations described in the claims can achieve the desired results even if they are performed in a different order. As an example, the processes depicted in the accompanying drawings do not necessarily require the specific illustrated order or sequential order shown to achieve the desired results. In some cases, multitasking or parallel processing may be advantageous.

Claims

1. A measuring device (1000) configured to be coupled to a control device (2000), Fluid conduit (1200) and, The first electrical connector (1480, 1480', 1480"), A first ultrasonic transducer (1410) and a second ultrasonic transducer (1420), each electrically connected to the first electrical connector, The first and second ultrasonic transducers (1410, 1420) are coupled to the fluid conduit by an acoustic coupling medium (1140), Equipped with, The first ultrasonic transducer is configured to emit an ultrasonic signal along an acoustic path (1160) extending from the first ultrasonic transducer to the second ultrasonic transducer through an acoustic coupling medium in response to the reception of a control signal. The second ultrasonic transducer is configured to receive an ultrasonic signal transmitted along the acoustic path and to generate a measurement signal based on the received ultrasonic signal, and the fluid conduit is positioned at least partially along the acoustic path so that the emitted ultrasonic signal propagates along the acoustic path and strikes the medium to be measured in the measurement section (1230) of the fluid conduit. Measuring device (1000).

2. The acoustic coupling medium (1140) includes a first portion (1141) and a second portion (1142), wherein the first portion couples the first ultrasonic transducer (1410) to the fluid conduit (1200), and the second portion couples the second ultrasonic transducer (1420) to the fluid conduit. The measuring device (1000) according to claim 1.

3. The system further comprises air backings (1120, 1130) positioned adjacent to the fluid conduit (1200) and separating the first portion (1141) and the second portion (1142) of the acoustic coupling medium (1140) from each other. The measuring device (1000) according to claim 2.

4. The air backing (1120, 1130) is configured to acoustically separate the first portion (1141) of the acoustic coupling medium (1140) from the second portion (1142) of the acoustic coupling medium, so that ultrasonic signals propagating along the acoustic path (1160) do not directly propagate from the first portion (1141) to the second portion (1142). The measuring device (1000) according to claim 3.

5. The acoustic path (1160) extends from the first ultrasonic transducer (1410) to the second ultrasonic transducer (1420), passing through the first portion (1141) of the acoustic coupling medium (1140), through the measurement section (1230), and through the second portion (1142) of the acoustic coupling medium. The measuring device (1000) according to any one of claims 2 to 4.

6. The acoustic coupling medium (1140) comprises a thermoplastic material, preferably the thermoplastic material comprises an epoxy resin and / or is substantially homogeneous. A measuring device (1000) according to any one of claims 1 to 5.

7. The present invention further comprises a printed circuit board (1400, PCB) which includes the first electrical connector (1480, 1480') and is configured to electrically connect the first (1410) and second (1420) ultrasonic transducers to the first electrical connector. A measuring device (1000) according to any one of claims 1 to 6.

8. Each of the first (1410) and second (1420) ultrasonic transducers is mechanically connected to the PCB (1400). The measuring device (1000) according to claim 7.

9. The first ultrasonic transducer (1410) and the first connection portion (1416) of the first ultrasonic transducer form a first transducer module (1411), and the second ultrasonic transducer (1420) and the second connection portion (1426) of the second ultrasonic transducer form a second transducer module (1421). The measuring device (1000) according to claim 7.

10. The first connection portion (1418) and the second connection portion (1428) of the PCB (1400) are configured to electrically and mechanically connect the first (1410) and the second (1420) ultrasonic transducers to the PCB. The measuring device (1000) according to claim 9.

11. The first connection portion (1418) and the second connection portion (1428) of the PCB (1400) are configured to electrically and mechanically connect the first (1410) and the second (1420) ultrasonic transducers to the PCB (1400). The measuring device (1000) according to claim 9 or 10.

12. The first electrical connector (1480) includes one or more of the following: USB-C connector, USB-A connector, USB-B connector, micro USB connector, mini USB connector, HDMI connector, and SUB-D connector. The measuring device (1000) according to any one of claims 7 to 11.

13. The first electrical connector (1480', 1480") includes a first coil (1481') and a second coil (1482'), A measuring device (1000) according to any one of claims 1 to 11.

14. The first coil (1481') is configured to be inductively coupled to the first coil (2281') of the control device (2000), and the second coil (1482') is configured to be inductively coupled to the second coil (2282') of the control device (2000). The measuring device (1000) according to claim 13.

15. The first electrical connector (1480', 1480") includes a third coil (1483') configured to inductively couple to a third coil (2281') of the control device (2000). The measuring device (1000) according to claim 14.

16. The PCB (1400) includes a first coil (1481') of the first electrical connector (1480'), a second coil (1482') of the first electrical connector (1480'), and optionally a third coil (1483') of the first electrical connector (1480'). A measuring device (1000) according to any one of the preceding claims, in combination with claims 7 and 13.

17. The first electrical connector (1480, 1480', 1480") is configured to distribute electrical signals, and optionally, the electrical signals include control signals and measurement signals. A measuring device (1000) according to any one of claims 1 to 16.

18. The first electrical connectors (1480, 1480', 1480") are configured to connect to the second electrical connectors (2280, 2280', 2280") of the control unit (2000). A measuring device (1000) according to any one of claims 1 to 17.

19. The first ultrasonic transducer (1410) is configured to receive the control signal from the control device (2000) through the first electrical connector (1480', 1480', 1480"), and / or the second ultrasonic transducer (1420) is configured to transmit the measurement signal to the control device through the first electrical connector (1480', 1480', 1480") A measuring device (1000) according to any one of claims 1 to 18.

20. The system further comprises one or more sensors, and the one or more sensors are Temperature sensor, pressure sensor, Conductivity sensor, and Optical sensor Including one or more of the following: A measuring device (1000) according to any one of claims 1 to 19.

21. The inner diameter of the fluid conduit (1200) is in the range of 0.1 to 0.5 inches (0.254 to 1.27 cm), preferably the inner diameter is 0.25 inches (0.635 cm), or The inner diameter of the fluid conduit is in the range of 0.5 to 1.5 inches (1.27 to 3.81 cm), preferably 1 inch (2.54 cm). A measuring device (1000) according to any one of claims 1 to 20.

22. The fluid conduit (1200) has a first end (1210) and a second end (1220) that are fluidly connected to each other and configured to be attached to a fluid circuit. A measuring device (1000) according to any one of claims 1 to 21.

23. The first end (1210) and / or the second end (1220) include one of a sanitary connector, an aseptic quick connector, and an MPX insert. The measuring device (1000) according to claim 22.

24. The main unit (1100) is further equipped, A measuring device (1000) according to any one of claims 1 to 23.

25. The main body (1100) includes a coupling portion (1300) configured to connect the measuring device to the control device (2000). The measuring device (1000) according to claim 24.

26. The main body (1100) defines the fluid conduit (1200) as an integral part thereof. The measuring device (1000) according to claim 24 or 25.

27. The main body (1100) is configured to fix the PCB (1400) relative to the fluid conduit (1200). A measuring device (1000) according to any one of claims 24 to 26.

28. The first ultrasonic transducer (1410) and the second ultrasonic transducer (1420) are fixedly positioned relative to the fluid conduit (1200) by the acoustic coupling medium (1140). A measuring device (1000) according to any one of claims 1 to 27.

29. The measuring device is configured for use in the medical and / or pharmaceutical fields. A measuring device (1000) according to any one of claims 1 to 28.

30. A housing (2100) including a coupling (2300) configured to receive a measuring device (1000), The second electrical connector (2280, 2280', 2280"), An electronic control unit (2200, ECU) is electrically connected to the second electrical connector and configured to transmit one or more control signals to the measuring device and to receive one or more measurement signals from the measuring device, A control device (2000) comprising the following.

31. The coupling portion (2300), when coupled to the control device, includes a locking mechanism configured to selectively lock the measuring device (1000) or selectively unlock the measuring device in the coupled position. The control device (2000) according to claim 30.

32. The locking mechanism includes a bayonet-type locking mechanism. The control device (2000) according to claim 31.

33. The locking mechanism further comprises a switch (2360) configured to selectively lock and unlock, wherein the selective locking and selective unlocking include tactile and / or audible feedback. The control device (2000) according to claim 31 or 32.

34. The device further comprises a cover (2330) configured to cover at least a portion of the aforementioned joint (2300). A control device (2000) according to any one of claims 30 to 33.

35. The cover (2330) is configured to cover the second electrical connector (2280) when there is no measuring device (1000) coupled to the control device (2000). The control device (2000) according to claim 34.

36. The system further includes a status indicator (2210) connected to the ECU (2200) and configured to indicate the operating state of the control device and / or the operating state of the measuring device (1000) when connected to the control device (2000). The control device (2000) according to any one of claims 30 to 35.

37. The second electrical connector (2280, 2280', 2280") is configured to distribute electrical signals, and optionally, the electrical signals include control signals and measurement signals. A control device (2000) according to any one of claims 30 to 36.

38. When the measuring device (1000) is coupled to the control device, the control device is configured to transmit a control signal to the control device and to receive a measurement signal from the measuring device. The measurement signal indicates the characteristics of the fluid flow in the measurement section (1230) of the fluid conduit (1200) of the measuring device. A control device (2000) according to any one of claims 30 to 37.

39. The second electrical connector (2280) includes one or more of the following: USB-C connector, USB-A connector, USB-B connector, micro USB connector, mini USB connector, HDMI connector, and SUB-D connector. A control device (2000) according to any one of claims 30 to 38.

40. The second electrical connector (2280', 2280") includes a first coil (2281') and a second coil (2282'), A control device (2000) according to any one of claims 30 to 39.

41. The first coil (2281') is configured to inductively couple to the first coil (1481') of the measuring device (1000), and the second coil (2282') is configured to inductively couple to the second coil (1482') of the measuring device (1000). A control device (2000) according to any one of claims 30 to 40.

42. The first electrical connector (2280', 2280'') includes a third coil (2283') configured to inductively couple the third coil (1181') of the measuring device (1000). A control device (2000) according to any one of claims 30 to 41.

43. The control device (2000) is configured to determine the presence of a coupled measuring device (1000), the operating state of the coupled measuring device, and one or more types of the coupled measuring device, based on the inductive coupling of the control device and the third coils (1483', 1483'', 2283', 2283'') of the measuring device. A control device (2000) according to any one of claims 30 to 42.

44. The ECU (2200) includes a first coil (2281') of the second electrical connector (2280'), a second coil (2282') of the second electrical connector (2280'), and optionally a third coil (2283') of the second electrical connector (2280'). A control device (2000) according to any one of claims 30 to 43.

45. The second electrical connector (2280, 2280', 2280") is configured to distribute electrical signals, and optionally, the electrical signals include control signals and measurement signals. A control device (2000) according to any one of claims 30 to 44.

46. The second electrical connector (2280, 2280', 2280") is configured to connect to the first electrical connector (1480, 1480', 1480") of the measuring device (1000). A control device (2000) according to any one of claims 30 to 45.

47. The ECU (2200) has the function of controlling one or more sensors of the measuring device (1000) and receiving measurement signals from the one or more sensors, Temperature sensor, pressure sensor, Conductivity sensor, and Optical sensor Including one or more of the following: A control device (2000) according to any one of claims 30 to 46.

48. The control device is at least partially made from components including stainless steel. A control device (2000) according to any one of claims 30 to 47.

49. The control device is configured for use in the medical and / or pharmaceutical fields. A control device (2000) according to any one of claims 30 to 48.

50. A system (100) for measuring fluid flow, A measuring device (1000) according to any one of claims 1 to 29, A control device (2000) according to any one of claims 30 to 49, A system (100) comprising the above.

51. A method (1500) for manufacturing a measuring device (1000) according to any one of claims 1 to 29, The steps include preparing the inner surface (1506) of the main body (1100) of the measuring device for casting thermoplastic resin, The steps include: positioning the PBC (1400) of the measuring device relative to the main body (1100) (1508), The step of casting the thermoplastic resin (1510), The step of curing the thermoplastic resin (1512), Methods that include...

52. The step (1504) further includes arranging a first ultrasonic transducer (1410) and a second ultrasonic transducer (1420) on the main body (1100), The method according to claim 51.

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