Device for detecting and registering of measurement data

Abstract

A device (1) for the detecting and registering of measurement data, having a first housing (2) in which electronics (7) are arranged, and having at least one sensor (14), which is electrically connected to the electronics (7). The first housing (2) includes at least two housing parts (3, 4), having at least one metallic connection site and being joined together at the connection site by a gas-tight metal/metal connection. The at least one sensor (13) is arranged in a second housing (11), which encloses the first housing (2) substantially entirely, and which includes at least two housing parts (12, 15), which are detachably joined together or can be so joined.

Claims

1. A device (1) for the detecting and registering measurement data, the device comprising: a first housing (2) in which electronics (7) are arranged, at least one sensor (14), which is electrically connected to the electronics (7), wherein the first housing (2) comprises at least two housing parts (3, 4), and the two housing parts (3, 4) have at least one metallic connection site and are joined together at the connection site by a gas-tight metal/metal connection, and the electronics (7) are arranged in a first housing (2), wherein the electronics (7) are arranged on a circuit board (6), and the circuit board (6) is mounted floating inside the first housing (2) or secured on one side, and a second housing (11), the at least one sensor (13) is arranged in the second housing (11), which encloses the first housing (2) substantially entirely, and the second housing (11) comprises at least two second housing parts (12, 15), which are detachably joined together.

2. The device (1) according to claim 1, wherein the gas-tight metal/metal connection is produced by welding or brazing.

3. The device (1) according to claim 1, wherein the first housing (2) comprises a tube (3) having end face openings, and the end face openings of the tube (3) are closed by covers (4), and at least one said cover (4) comprises a gas-tight metal/metal connection to the tube (3).

4. The device (1) according to claim 3, wherein at least one of the covers (4) comprises at least one feedthrough (8), with which an electrical connection is produced between the first housing (2) and the second housing (11).

5. The device (1) according to claim 1, wherein the circuit board (6) is at least one of electrically or mechanically connected to at least one feedthrough (8) by at least one of a flexible conductor or a c-board (10).

6. The device (1) according to claim 1, wherein the at least one sensor (13) is arranged in a first of the two second housing parts (12) and a power supply is arranged in a second of the two second housing parts (15), and the first housing (2) is arranged axially between the two housing parts (12, 15) of the second housing (11).

7. The device (1) according to claim 1, wherein the second housing (11) comprises a sleeve part (17), in which the first housing (2) is axially installed.

8. The device (1) according to claim 1, wherein the second housing parts (12, 15, 17, 20) are joined together by threads (18, 19).

9. The device (1) according to claim 8, wherein at least one of the threads (18, 19) comprises a thread locking, which prevents an unintentional opening.

10. The device (1) according to claim 9, wherein the thread locking is formed by a shape deviation of a thread.

11. The device (1) according to claim 1, wherein the electronics (7) are arranged in the first housing (2), and the at least one sensor (13) is arranged in the second housing (11), which substantially entirely encloses the first housing (2) and which comprises the at least two second housing parts (12, 15) that are joined together by a gas-tight metal/metal connection.

12. The device (1) according to claim 1, wherein the housing parts (3, 4) of the first housing (2) are made of stainless steel, and the second housing parts (12, 15, 17, 20) are formed of at least one of metal, plastic, or ceramic.

13. The device (1) according to claim 1, wherein at least one of the first housing (2) or the second housing (11) has a circular cross section.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) The invention is described in more detail in the following with the aid of a preferred exemplary embodiment, making reference to the enclosed drawings.

(2) Shown are:

(3) FIG. 1 a longitudinal section through the first housing of a device according to the invention,

(4) FIG. 2 a perspective view of a device according to the invention,

(5) FIG. 3 a longitudinal section through the device of FIG. 2,

(6) FIG. 4 a perspective view of a second device according to the invention, and

(7) FIG. 5 a longitudinal section through the device of FIG. 4.

DETAILED DESCRIPTION

(8) FIG. 1 shows a preferred embodiment of a first housing 2 of a device 1 according to the invention. The first housing 2 comprises a hollow cylinder 3, which is produced seamlessly from a stainless steel. At the two end faces there are arranged covers 4, which likewise is formed of the same stainless steel. The two covers 4 are each welded gas-tight to the hollow cylinder 3. In order to obtain a gas-tight welded seam which is in particular free of hairline cracks, the stainless steel is a low-sulphur stainless steel.

(9) In this way, the interior space 5 of the first housing 2 is protected against external influences. In the interior space 5 there is located a circuit board 6, on which the electronics 7 for the detecting, evaluating and registering of measurement data is situated.

(10) Glass/metal feedthroughs 8 are arranged respectively in the two covers 4, whereby a contact pin 9 is led through an opening in the cover 4, being sealed off by glass.

(11) In the example shown, a c-board 10 is arranged on the left cover 4 in the interior space 5, being electrically connected to the contact pins 9. The circuit board 6 is secured and electrically contacted on the c-board 10, so that the contact pins 9 are electrically connected to the circuit board 6 and thus the electronics 7.

(12) The contact pins 9 of the opposite cover 4 are also connected for manufacturing reasons by flexible conductors, such as cables, to the circuit board 6. On this side, the contact pins 9 are connected on the outside of the cover 4 to a c-board 10.

(13) This one-sided fastening of the circuit board 6 in the interior space 5 prevents the transmittal of expansion stresses from the first housing 2 to the circuit board 6 and vice versa.

(14) FIG. 3 shows a preferred embodiment of a device according to the invention 1. The device comprises a second housing 11, which is formed in the example of four housing parts. A first housing part 12 comprises a measuring tip 13, in which a sensor 14 is arranged, such as a temperature sensor. In a cylindrical segment, the first housing part 12 comprises an internal thread 18.

(15) A second housing part 15 comprises a battery 16 or an accumulator. The battery 16 may be replaceable. For this, the second housing part 15 in the example can be opened axially at a closure 23. This may likewise be done via a thread or a bayonet. However, an accumulator may also be provided, which can be inductively charged, for example. The second housing part 15 has an external thread 19 in a cylindrical segment.

(16) A third housing part 17 is configured as a sleeve, in which the first housing 2 can be installed axially. The sleeve 17 for this purpose is configured as a hollow cylinder, whose inner diameter is adapted to the outer diameter of the hollow cylinder 3 of the first housing 2. External threads 19 are arranged on the outer circumference of the sleeve 17.

(17) A fourth housing part 20 is designed as a sleeve with internal threads 18.

(18) FIG. 2 shows how the individual housing parts of the second housing 11 are joined together. The second housing part 15 can be joined by means of the fourth housing part 20 to the third housing part 17 via the respective threads. The first housing part 12 can be screwed onto the third housing part 17. Preferably, the threads in particular between the first, third and fourth housing parts have a thread locking, which prevents an unintentional or unauthorized loosening of the screw connection. This thread locking may be produced for example by a shape deviation in the thread, bringing about a plastic deformation for a form-fitting connection. However, only the closure 23 can also be designed without such a thread locking. This ensures that the battery 16 can be removed without risk of inadvertently opening the housing.

(19) The fourth housing part 20 furthermore comprises a contact 21, which on the one hand produces an electrical connection with the contact pins 9 of the first housing 2 and on the other hand with the second housing part. In this way, an electrical contacting of the battery 16 with the electronics 6 is assured.

(20) Likewise, the first housing part 12 has a contact 21, which makes contact with the c-board 10 and by which the sensor 14 is electrically connected to the electronics 7 in the first housing 2.

(21) Between the individual housing parts of the second housing 11 are arranged seals 22, which protect the second housing 11 against the penetration of moisture. In the example, the seals 22 are formed as O-rings, which are axially press fitted between the individual housing parts.

(22) The second housing 11 may be formed of plastic, ceramic, or another material. It is also possible for individual housing parts to be made of different materials.

(23) FIG. 4 shows an alternative embodiment of a device according to the invention 1. The same parts as in the embodiment of FIG. 1 to 3 are given the same reference numbers and are only once more described where there are differences.

(24) The device 1 comprises a second housing 11, which is composed of multiple housing parts. A first housing part 12 is built similarly in principle to the embodiment of FIG. 2. Accordingly, the measuring tip 13 with a sensor 14 is arranged on this first housing part 12. The first housing part 12 is shaped as a hollow cylinder. In a departure from FIG. 2, the first housing part 12 has an interior space 5 in which the first housing 1 is entirely inserted and enclosed.

(25) The device 1 comprises a first housing 2, in which the electronics 7 are arranged on a circuit board 6. The first housing 2 in this embodiment is substantially shaped as a frame around the circuit board 6. It is basically cuboidal here, the short sides being formed as circle sectors, so that they lie against the hollow cylindrical interior space 5. The contacting with the sensor 14 may likewise occur here for example via a c-board or a plug connection. The first housing 2 in this embodiment may be formed for example of plastic or some other material.

(26) The second housing 11 furthermore comprises a second housing part 15, which is connected to the first housing part 12 via a gas-tight metal/metal connection. In the example, the second housing part 15 has an encircling rim, which engages with the interior space 5 of the first housing part 12.

(27) Inside the second housing part 15 there is a glass/metal bushing 8, with which the electronics 7 can make contact. The second housing part 15 has a coupling for attaching a battery, which is not shown here, similar to the embodiment of FIG. 2.

(28) Between the circuit board 6 and the second housing part 15 there is formed a plug connection, which produces an electrical contacting with the bushing 8.

(29) The second housing 11 here may be formed entirely of the already described stainless steel. However, it is also possible for individual or all housing parts to be formed of ceramic, in which case the connection site between the two housing parts is metallized so that a gas-tight metal/metal connection can be realized.

LIST OF REFERENCE NUMBERS

(30) 1 Device 2 First housing 3 Hollow cylinder 4 Cover 5 Interior space 6 Circuit board 7 Electronics 8 Bushing 9 Contact pin 10 c-board 11 Second housing 12 First housing part 13 Measuring tip 14 Sensor 15 Second housing part 16 Battery 17 Third housing part 18 Internal thread 19 External thread 20 Fourth housing part 21 Contact 22 Seal 23 Battery compartment closure