DE8811496U1 - Metal detector with a detector probe - Google Patents

Description

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Vaiioti GmbH/ 7412 Eningeri

131/30 CM. September? 1988

Ki/kr

Metal detector with a detector probe

The invention relates to a metal detector with a detector probe located on a support tube according to the type of the main claim.

Metal detectors of this type are equipped with a current

,ε generator and generate an alternating electromagnetic field using the field and receiver coils located in the probe housing, whereby a magnetic locating signal acts back on the probe. Devices of this type are mainly used in

_on the search for metal parts stored in the ground or other non-metallic elements, the presence of which is registered by the device as soon as it is touched by its e!ect?Qmagnetic alternating field. In this process, metal-containing substances send impulses to the

2= transmitted back to the search device and recorded there or the generating field is dampened, as indicated by an evaluation controller.

Devices of the aforementioned type are known, but due to the circular design of the detector probe, they make it _difficult to move forward quickly, particularly in areas with high grass or bushes. This is particularly the case when the circular detector probes designed in this way have a large circular diameter. Even in uneven terrain, especially in the presence of furrows or gullies, an effective search is not possible with the previously known forms.

-4-the detector probe is made more difficult.

The invention is therefore based on the object of creating a metal detector of the type mentioned above, which makes it easier to move forward in difficult terrain and in high grass or bushes, without this impairing the effective detection area.

The solution to the problem is achieved according to the invention in a metal detector of the type mentioned in that the detector probe is located in an almost oval, ring-shaped housing which is flattened on both ends.

The almost oval shape of the detector probe housing enables faster and easier progress in difficult terrain, especially in tall grass or bushes, as the narrow front side of the detector probe housing

2Q housing points in the direction of travel of the detecting person. j|

The resistance due to the vegetation on the terrain that has to be penetrated is significantly reduced because the device only hits it with a narrow area. The detection performance is not affected because the area to be covered, measured in m ² /h, is just as large as with a round coil with a large diameter. This is due to the fact that the longitudinal diameter of the detector probe is fully effective during a left-to-right swivel movement.

The almost oval shape of the detector probe housing has an influence on the electromagnetic function of the device in that smaller metal parts in the immediate vicinity are preferentially detected in contrast to a comparable round coil. The oval shape represents an advantageous compromise solution

III!

between a small detector coil, which is more sensitive to small parts, and a large detector coil, which can be used to check a large area within a short time. This also results in an immediate economic benefit.

An advantageous embodiment of the metal detector consists in particular in the features set out in claims 2 and 3.

By arranging the support tube in the middle of a web running through the longitudinal diameter of the housing, whereby the support tube is movably mounted at the connection point to the detector probe, greater mobility during detection is ensured in rough terrain.

The fact that the swivel axis of the support tube runs at a right angle to the web ensures that the detection range covers the same area during swivel movements as is achieved with a circular shape of the detection probe.

^{The invention} is explained in more detail below with reference to the drawings. They show:

Figure 1 shows a metal detector according to the invention viewed from above and

Figure 2 is a side view of the metal detector shown in Figure 1.

Figure 1 shows the almost oval, ring-shaped housing 1, gg which is flattened at both ends. In this housing 1 of the detector probe are both the external field coil and the two internal

fempfangsspuleft/ which are not visible outside of Figure 1, the preamplifier and a support tube 2 are attached to the middle of the web 3 running through the longitudinal diameter of the housing. The pivot axis running at right angles to this web 3 running through it is shown by a broken line.

The side view of the metal detector according to the invention shown in Figure 2 shows the housing 1 of the device shown in Figures ¹ , the field urid

&igr;&agr; Dofesktcrscnde ,

f,-as not visible in the drawing. The support tube 2 is attached to the connection point 4 on the web 3 that runs through the detector probe housing in its longitudinal diameter. The angle between the surface of the housing 1 and the support tube 2 is variable. The housing 1 of the detector probe is mounted on the support tube 2 so that it can move vertically, although the mobility is only given in the direction of the support tube 2 or its imaginary extension.

&ldquor;&eegr; ^The direction of movement ^possibly described is shown in the drawing by broken arrows»

Claims (5)

Vallon GmbH, 7412 Eningen 131/30 01 September 1988 Ki/kr Protection claims 1. Metal detector with a detector probe located on a carrying tube, which contains at least one external field coil, characterized in that ,_ c h &eegr; e t, that the detector probe is an almost oval, Ib annular housing (1) which is flattened on both end faces. 2. Metal detector according to claim 1, characterized in that the support tube (2) is attached to a the longitudinal diameter of the housing in the middle is fixed to a web (3) which connects the two narrow front sides of the oval, ring-shaped housing (1). 3. Metal detector according to claim 2, characterized in that the pivot axis of the support tube (2) runs at a right angle to the web (3). _ ₀ 4. Metal detector according to one of the preceding Claims, characterized in that the support tube (2) is movably mounted at the connection point (4) to the detector probe, and the area formed between the detector surface (5) and the support tube (2) gg dete angle is variable. 5. Metal detector according to one of the preceding « 4 ·* &bull; * 4 I * -2- claims, characterized in that the support tube (2) is mounted vertically movable in relation to the detector probe housing (1).