SENSOR DEVICE

Abstract

The invention relates to a sensor device with a beaker-like sensor housing and a wired sensor, wherein the beaker-like sensor housing has an introduction region for the wired sensor. Furthermore, an orientation region for the sensor and a placement region of the sensor close to the end face of the sensor housing is provided. According to the invention, the orientation region has an internal cross-sectional contour which is adapted to the cross-sectional contour of the sensor, and the sensor is introduced into a curable material in its placement region in the sensor housing.

Claims

1. A sensor device with a beaker-like sensor housing and a wired sensor, wherein the beaker-like sensor housing has an introduction region for the wired sensor, an orientation region for the sensor, and a placement region of the sensor close to the end face of the sensor housing, wherein the orientation region has an internal cross-sectional contour which is adapted to the cross-sectional contour of the sensor, the sensor in the sensor housing is introduced into a curable material into its placement region, and the curable material is cured with the sensor embedded.

2. The sensor device according to claim 1, wherein a strain relief means for the cable and sensor, in particular formed as an O-ring, with a cable-adapted opening, is provided on the introduction region of the sensor housing.

3. The sensor device according to claim 1, wherein guide bars for the sensor, in particular four guide bars at the same angular distance from each other, are provided in the introduction region.

4. The sensor device according to claim 1, wherein a tapering cross-section for guiding the sensor into the placement region is provided in front of or on the orientation region of the sensor.

5. The sensor device according to claim 1, wherein the sensor is introduced into the curable material.

6. The sensor device according to claim 1, wherein the curable material is a free-flowing plastics material or a resin.

7. The sensor device according to claim 1, wherein the sensor housing is produced from a plastics material, in particular Lexan.

8. The sensor device according to claim 1, wherein the orientation region has a cross-section in the form of an oval.

9. The sensor device according to claim 1, wherein the beaker-like sensor housing has an end-face closure, in the vicinity of which the detection zone of the sensor, which is formed in particular as a Reed contact, is provided.

10. The sensor device according to claim 1, wherein the curable material is introduced and cured once the sensor has been introduced into its placement region.

Description

[0023] The invention will be discussed in greater detail below with reference to two schematic drawings, in which:

[0024] FIG. 1 is a longitudinal section through a sensor housing, without the sensor and cable but with strain relief provided on the end; and

[0025] FIG. 2 somewhat enlarged, is a vertical section through a sensor housing as illustrated in FIG. 1 without strain relief on the end, viewed from the left; the schematic section according to FIG. 1 is marked A-A in FIG. 2.

[0026] The sensor device according to the invention is shown schematically and discussed in greater detail below with reference to two schematic representations of the essential module, namely a sensor housing 1, without the actual sensor or the sensor element and without a corresponding cable connection.

[0027] The longitudinal section of FIG. 1 through a beaker-like sensor housing 1 shows the beaker of the sensor housing 1 which is produced in particular in one piece from a plastics material, such as Lexan. The left-hand end region of the sensor housing 1 shows an opening, into which an O-ring 21 is inserted and fixed.

[0028] The sensor housing 1 is closed in the manner of a beaker on the end face 7 on the right.

[0029] In the production operation for the sensor device, the sensor housing 1 is usually arranged with its left-hand-side opening upwards in a vertical position.

[0030] Then a curable, free-flowing material or a resin is introduced into the beaker 6 of the sensor housing 1. Subsequently, the actual sensor with its connected cable is inserted into the upper opening of the beaker 6 and is guided or lowered centrally from the introduction region 3 into the orientation region 4 by means of the guide rails 11. The sensor is oriented by means of the internal contour, which is configured as an oval 16, by way of the conical tapered region 14.

[0031] The sensor or the sensor element in the example illustrated likewise has the external form of the corresponding oval 16, so that the sensor can be guided with an exact fit into the right-hand or lower placement region 5 through the oval 16.

[0032] Once the end position of the sensor in the region of the inner face of the end face 7 has been reached, subsequently the curing operation of the curable material is carried out, it being possible to realise air-free and bubble-free embedding and fixing of the sensor in the sensor housing 1.

[0033] The O-ring 21 which is attached to the cable for strain relief of the sensor can be fixed in a ring groove on the opening side of the introduction region 3 once the free-flowing material has been cured and possibly also prior to curing. Thus a closure is thereby provided also with respect to the embedding and encapsulation material.

[0034] In this design, the sensor device represents a very accurately arranged sensor, which is not adversely affected in its relative positioning in the interior of the sensor housing even by acting impact forces, and thus also ensures high measuring accuracy.

[0035] An annular bead 25 in the middle region of the sensor housing 1 may also serve for accurate positioning of the sensor housing 1 on the frame of a bike, with clamping holders performing the further fastening to the frame of a bike on one side or on both sides of the annular bead 25.