DE29621644U1 - Device for flow-dependent measurements - Google Patents

Description

The invention relates to a device for current-dependent measurements, which is provided with a tripod to be placed on the seabed, a shaft hanging vertically from the tripod, a motor attached to the tripod and acting on the shaft, and a sampler attached to the shaft.

With such soil water samplers, it is important that the sampler, which is equipped with inlet openings, is stably aligned against the flow.

940
Bremen·.

Hollerallec 32, D-28209 Bremen
POB 10 71 27, D-28071 Bremen

Telephone (04 21) 3 40 50
KicäK <<H 21} 3 49 17 68
Telex 244 958 bopat d

Munich:

Franz-Joseph-Strasse 38
D-80801 Munich
Telephone (0 89) 34 70 80
Fax {0 39) 34 70 IQ
Telex 524282 forbod

Berlin-Brandenburg:

Helene-Lange-Straße 3 D-14469 Potsdam Telephone (03 31) 27 54 30 Fax (03 31)2 75 43 21

Dusseldorf;

Neßlerstrasse 5 D-40593 Düsseldorf

Telephone (02 11) 71 89 83 Fax (02 11)7 18 27 Leipzig:

Philipp-Rosenthal-Strasse D-04103 Leipzig
Telephone (03 41) 9 60 29 Fax (03 41) 31 03 25

Kiel:

Niemannsweg D-24105 KeI Telephone (04 31) 840 Fax (04 31) S 40

Valencia;

Plaza Cairo SoIeIo 1-2 ES-03001 Alicante (Spain)

Telephone +34-6-598 0038 Teteiax +34-6-596 0\S2

e-mail: Postmaster@BoehmertBoehniert.de

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The invention is based on the object of further developing the known soil water sampler in such a way that a stable alignment of the sampler against the flow is ensured so that trouble-free sampling is possible.

According to the invention, this object is achieved by a directional flag mounted on the shaft so as to be freely pivotable within a predetermined angular range, a sensor device which detects the deviation of the directional flag from a zero position and an electronic circuit which acts on the motor when the directional flag deviates from the zero position and causes the sampler to track.

The sensor device is preferably a sensor field consisting of Hall sensors that respond to a magnet attached to the position flag.

The angle within which the position flag can be swiveled on the shaft should be +10°.

The invention is described in the following description with reference to a device for taking soil water samples, but it can also be used, for example, to align measuring devices with the flow. The term "sampler" in the sense of the claims therefore also includes measuring probes and the like of any kind.

In the figure, a wave 12 can be seen hanging vertically from a tripod (not shown) placed on the seabed. The wave 12 is acted upon by a

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- also not shown - motor which is attached to the stand. At the lower end of the shaft 12 there is a sampler 16 which is provided with inlet openings - not shown - which can be positioned against the flow by operating the motor (and thus rotating the shaft).

The shaft 12 carries a direction flag 18 that can be freely pivoted at an angle of +10°. The direction flag 18 is provided with a magnet 22 that acts on a sensor field consisting of Hall sensors attached to the shaft 12.

The direction flag will always be positioned in the direction of the flow - within the permissible angle range - and thus move relative to the sensor field 20 placed on the shaft 12. The sensor field 20, consisting of Hall sensors, detects a deviation of the magnet 22 from a zero position (the center of the sensor field 20). This deviation from the zero position is reported by the sensor field 20 to an electronic circuit (not shown), which acts on the motor in such a way that the shaft (and thus the sensor field 20) returns to a zero position relative to the magnet. The sampler, which is firmly attached to the shaft 12, follows this movement and is thus constantly placed in the flow.

Claims (3)

BOEHMERT»& BOEHNffiRT.. V 5027 CLAIMS 1. Device for current-dependent measurements, with a tripod to be placed on the seabed, a shaft (12) hanging vertically from the tripod, a motor attached to the tripod and acting on the shaft (12) and a sampler (16) attached to the shaft (12), characterized by a directional flag (18) mounted on the shaft (12) so as to be freely pivotable relative to the shaft within a predetermined angular range, a sensor device which detects the deviation of the directional flag (16) from a zero position, and an electronic circuit which acts on the motor when the directional flag (18) deviates from the zero position and causes the sampler (16) to be tracked. 2. Device according to claim 1, characterized in that the sensor device is a sensor field (20) consisting of Hall sensors, which responds to a magnet (22) attached to the position flag (18). 3. Device according to one of the preceding claims, characterized in that the pivoting angle of the position flag (18) is +10°.