SPEED DETECTION DEVICE COMPRISING A KIEL PROBE

Abstract

An apparatus (1) for velocity detection comprises a Kiel probe (2) having a flow velocity probe which is encompassed by a shell element (3) forming a Venturi nozzle. In order to create advantageous measurement conditions, the shell element (3) is designed as a multi-hole dynamic pressure probe having holes (4) in the shell element (3) arranged across the circumference of the shell.

Claims

1. An apparatus for velocity detection, said apparatus comprising: a Kiel probe (2) having a flow velocity probe that is encompassed by a shell element forming a Venturi nozzle; the shell element being configured as a multi-hole dynamic pressure probe, said shell element having holes in the shell element arranged distributed across a circumference of the shell element.

2. The apparatus according to claim 1, wherein dynamic pressure sensors are connected to the holes.

3. The apparatus according to claim 1, wherein the holes in the shell element arranged distributed across the circumference of the shell element are arranged uniformly distributed about a longitudinal axis of the flow velocity probe in a plane that is perpendicular to the longitudinal axis of the flow velocity probe.

4. The apparatus according to claim 2, wherein the holes are in a common plane and connect to the dynamic pressure sensors via dynamic pressure channels of equal length.

5. The apparatus according to claim 3, wherein, in a direction of a longitudinal axis of the flow velocity probe, the holes are located in at least two planes spaced apart from each other and wherein the holes in each of the planes are arranged distributed across the circumference of the shell element.

6. The apparatus according to claim 1, having an inertial navigation system.

7. The apparatus according to claim 1, having a global positioning system.

8. The apparatus according to claim 1, having a temperature sensor and/or a relative humidity sensor.

9. The apparatus according to claim 2, wherein the holes connect to the dynamic pressure sensors via dynamic pressure channels.

10. The apparatus according to claim 9, wherein the holes in the shell element arranged distributed across the circumference of the shell element are arranged uniformly distributed about a longitudinal axis of the flow velocity probe in a plane that is perpendicular to the longitudinal axis of the flow velocity probe.

11. The apparatus according to claim 2, wherein the holes in the shell element arranged distributed across the circumference of the shell element are arranged uniformly distributed about a longitudinal axis of the flow velocity probe in a plane that is perpendicular to the longitudinal axis of the flow velocity probe.

11. The apparatus according to claim 3, wherein the holes are in a common plane and the dynamic pressure sensors via dynamic pressure channels of equal length.

12. The apparatus according to claim 9, wherein the holes are in a common plane and the dynamic pressure channels are of equal length.

13. The apparatus according to claim 10, wherein the holes are in a common plane and the dynamic pressure channels are of equal length.

14. The apparatus according to claim 6, wherein the inertial navigation system is embedded in the shell element.

15. The apparatus according to claim 7, wherein the global positioning system is embedded in the shell element.

16. The apparatus according to claim 8, wherein the temperature sensor and/or the relative humidity sensor is embedded in the shell element.

Description

[0029] The subject matter of the invention is shown as an example in the drawings.

[0030] FIG. 1 shows an apparatus for velocity detection, in a view from an angle at the front,

[0031] FIG. 2 shows the apparatus in a view from an angle at the rear,

[0032] FIGS. 3a) to d) show the apparatus in a simplified section, in different motion and flow states, and

[0033] FIG. 4 shows a wiring diagram of an apparatus according to the invention.

[0034] The apparatus 1 for velocity detection comprises a Kiel probe 2 having a flow velocity probe which is encompassed by a shell element 3 forming a Venturi nozzle, wherein the shell element 3 is designed as a multi-hole dynamic pressure probe having holes 4 in the shell element 3, arranged distributed across the circumference of the shell.

[0035] The holes 4 in the shell element 3 arranged distributed across the circumference of the shell are preferably arranged uniformly distributed about a longitudinal axis of the flow velocity probe in a plane which is perpendicular to the longitudinal axis of the flow velocity probe.

[0036] At least two planes that are spaced apart are provided, in the direction of the longitudinal axis of the flow velocity probe, with holes arranged distributed across the circumference of the shell. One plane can also be sufficient, however

[0037] An inertial navigation system INS and a global positioning system GPS together with an analysis and communication unit are preferably arranged in the shell element. In addition, temperature ( C.) and/or relative humidity sensors (rF) are preferably provided in the shell element.

[0038] FIGS. 3a) to d) show examples of motion and flow states which can lead to incorrect measurement results in the case of individual sensors according to the state of the art.

[0039] In case a), the sensor velocity .sub.Sv.sub.S and the wind vector .sub.Sv.sub.US point in the opposite direction. The results are usable, but an orientation of the apparatus in the wind according to case c) would be better and more precise.

[0040] An identical global wind .sub.sv.sub.w prevails in cases b) and d). In case b), the inflow direction of the wind vector .sub.sv.sub.us is in the direction of the sensor axis. The global wind .sub.sv.sub.w can be calculated using the direction known from the INS and/or GPS data, for example, and the sensor velocity value .sub.sv.sub.s.

[0041] In case d), the sensor velocity .sub.sv.sub.s is oriented in the direction of the sensor axis. The oblique inflow recorded by the multi-hole dynamic pressure probe allows the angle of inflow to be calculated and indicates the presence of global wind .sub.sv.sub.w.

[0042] Both cases b) & d) deliver the same result.

[0043] The apparatus according to the invention comprises a wind sensor having a Kiel probe and multi-hole dynamic pressure probe, means for velocity and position detection and additional sensors for measuring air temperature, relative humidity and environmental pressure. All calculations are carried out by a microcontroller installed in the apparatus. The sensor output values are subsequently transmitted to a terminal device via a wired or wireless interface, such as WLAN, Bluetooth, ANT+ or the like. The sensor has a dedicated power supply. This comes either from an integrated battery having a charging circuit or comprises components of particularly low power consumption which draw the required power by means of power generation from the environment, such as from the wind.