DE102022005061A1 - Device for detecting a position and position detection system - Google Patents

Abstract

Device for detecting a position, comprising a profile element having a substantially square cross section and an elongated body, the profile element having at least one recess and a central cavity extending along the length of the body and a position detection element comprising a measuring probe, a first movable positioning element and an evaluation unit, wherein the evaluation unit is designed to detect a position of the first positioning element relative to the measuring probe and wherein the measuring probe is arranged in the central cavity of the profile element, wherein the first movable positioning element is arranged in the at least one first recess and is movable along it.

Description

The invention relates to a device for detecting a position and a position detection system.

Devices for detecting a position are known in principle. However, in order to use these together with profile elements, they previously had to be attached with special retaining clips. A separate space or space must also be provided on or near the profile element for a position detection element, which means that they must be structurally attached to the profile element. This creates a risk of damage.

From the publication DE 10 2018 100 516 A1 A linear position measuring device is known, in which a coil circuit board interacts with an actuator to measure a position. The coil circuit board is housed in a plastic profile. The publication CN 1 884 853 A discloses a fluid pressure cylinder with a position detection device.

It is an object of the present invention to provide an improved position detection apparatus and an improved position detection system.

This object is achieved by a device for detecting a position, comprising a profile element which in particular has a substantially square cross section and an elongated body, the profile element having at least one recess and a central cavity which extends along the length of the body and a position detection element, comprising a measuring probe, a first movable positioning element and an evaluation unit, wherein the evaluation unit is designed to detect a position of the first positioning element relative to the measuring probe and wherein the measuring probe is arranged in the central cavity of the profile element.

According to the invention, it is provided that the first movable positioning element is arranged in the at least one first recess and is movable along it.

The profile element has a substantially equal height and width and extends along a length. The profile element can have rounded corners in sections in cross section.

The profile element includes at least one recess that extends along the length of the body. The profile element also includes a central cavity, which can also be referred to as a core hole. In particular, the central cavity is centered both with respect to the width of the cross section and with respect to the length of the cross section, i.e. centered in both the horizontal and vertical directions. Furthermore, in particular, a center point of the central cavity in cross section coincides with a center point of the cross section of the profile element.

The profile element can be made of stainless steel, for example. Alternatively, the profile element can be made of aluminum, in particular anodized aluminum. In particular, the profile element is a series 8 profile element from item.

The device also includes a position detection element with a measuring probe, a first movable positioning element and an evaluation unit. The evaluation unit is designed to detect a position of the first positioning element relative to the measuring probe. The position detection element is also designed to detect a distance, a distance and/or a distance, in particular based on the detected position and a known starting position.

The measuring probe is arranged in the central cavity, in particular along the length of the body, and extends therein. In particular, a center point of the measuring probe in cross section coincides with the center point of the central cavity in cross section.

This provides a space-saving device for position detection. In addition, the solution according to the invention enables a device for position detection that can be easily installed and replaced in widely used profile elements.

According to an unclaimed, alternative aspect, a device for detecting a position is described, comprising a profile element, which in particular has a substantially rectangular cross section and an elongated body (although other cross sections are also possible), the profile element having a first recess, a second Recess, a first central cavity and a second central cavity, which extend along the length of the body and a position detection element comprising a first measuring probe, a second measuring probe, a first movable positioning element and a second movable positioning element and an evaluation unit, wherein the evaluation unit is trained, a position of the first positioning element relative to the first measuring probe and to detect a position of the second positioning element relative to the second measuring probe and wherein the first measuring probe is arranged in the first central cavity of the profile element and the second measuring probe is arranged in the second central cavity of the profile element .

As an alternative to the previously described embodiment, this profile element has two central cavities, in each of which a measuring probe is arranged, and at least two recesses. In addition, the position detection element has two positioning elements and the position detection device is designed to detect and evaluate the position of both positioning elements relative to the respective measuring probe.

In addition, the cross section is rectangular, in particular a width of the cross section being wider, in particular twice as wide, as a height of the cross section.

The first cavity and the second cavity in the cross section of the profile element are centered along a height, i.e. vertically, and spaced apart along a width, i.e. horizontally. In particular, the first cavity and the second cavity are spaced apart along the width by half the width of the cross section.

This solution according to the invention is particularly suitable for safety-relevant position detection. In particular, redundancy and/or error correction is provided by the second measuring probe and the second positioning element.

According to one embodiment, the at least one first recess and/or the at least one second recess may comprise a projection and the first and/or second movable positioning element may comprise a fastening element which engages the first projection in such a way that it is movable along the length of the body within the recess is attached.

The at least one first recess and/or the at least one second recess can have a quarter-circle-shaped cross section, in particular a mushroom-shaped cross section, in sections.

According to one embodiment, the first movable positioning element and/or the second movable positioning element comprises a magnetic element, wherein the position detection element is designed to detect a position of the positioning element based on the magnetostrictive principle.

According to one embodiment, the profile element has four, in particular exactly four, recesses which are arranged symmetrically around the central cavity in four sides of the square or rectangular cross section.

In an alternative embodiment, the profile element has six, in particular exactly six, recesses which are arranged symmetrically around the central cavity in four sides of the rectangular cross section.

Because several recesses are provided in the profile element, one or more of the recesses can be provided for the arrangement of the positioning element and one or more more of the recesses can be provided for fastening the profile element to other profile elements or objects.

In a further alternative embodiment, the profile element has exactly one recess in which only the first movable positioning element is arranged.

In a further alternative embodiment, the profile element has exactly two recesses, with the first movable positioning element being arranged in the first recess and the second movable positioning element being arranged in the second recess.

This results in a device that is particularly dirt-free and requires little cleaning.

The aforementioned object is also achieved by a position detection system, comprising an embodiment of an aforementioned device for detecting a position and a second profile element which is connected to the position detection element. This can result in a modular system, whereby (different) profile elements can be combined with different longitudinal profile housings.

With regard to the embodiments of the position detection system and their advantages, reference is made to the embodiments of the device for detecting a position and their advantages described above.

The embodiments of the device for detecting a position and the position detection system described here are particularly suitable for flexible use in any system or at any workplace for linear positioning or measuring tasks. For example, through the Embodiments according to the invention a stop of a chop saw can be provided.
Alternatively or additionally, a length measurement of parts or components can be provided. Alternatively or additionally, position control of screwing, riveting and adhesive systems can be provided on a workstation.

Alternatively or additionally, the embodiments can be used for positioning protective hoods and doors. Alternatively or additionally, the embodiments can be used for linear units, positioning systems and cross tables for robots, milling machines, positioning or metering systems. Alternatively or additionally, the embodiments can be used for quality processes, e.g. checking cable lengths before assembly for quality tracking and traceability. Alternatively or additionally, the embodiments can be used in lifting platforms, washing systems and/or injection molding machines.

• 1 einen Querschnitt eines Profilelements einer Vorrichtung zur Erfassung einer Position;
• 2 einen Querschnitt eines alternativen, nicht beanspruchten Profilelements einer Vorrichtung zur Erfassung einer Position;
• 3 eine perspektivische Ansicht des Profilelements aus 1;
• 4 eine perspektivische Ansicht des Profilelements aus 3 mit einem Flanschelement;
• 5 eine perspektivische Rückansicht des Flanschelements aus 4;
• 6 eine perspektivische Ansicht einer Vorrichtung zur Erfassung einer Position mit einem Profilelement aus 4
• 7 eine perspektivische Ansicht der Vorrichtung zur Erfassung einer Position aus 6 mit einem Gehäuseelement
• 8 eine perspektivische Detailansicht des Profilelements aus 1 mit einem Positionierungselement;
• 9 eine perspektivische Ansicht der Vorrichtung zur Erfassung einer Position aus 7;
• 10 eine perspektivische Ansicht der Vorrichtung zur Erfassung einer Position aus 7 mit einem Adapterelement;
• 11 eine perspektivische Ansicht eines Positionserfassungssystems mit einer Vorrichtung zur Erfassung einer Position aus 9; und
• 12 eine Schnittansicht in Draufsicht des Positionserfassungssystems aus 11.

Embodiments of a device for detecting a position and a position detection system will now be described in more detail in connection with the following figures. Show it:

• 1 a cross section of a profile element of a device for detecting a position;
• 2 a cross section of an alternative, unclaimed profile element of a position detection device;
• 3 a perspective view of the profile element 1 ;
• 4 a perspective view of the profile element 3 with a flange element;
• 5 a perspective rear view of the flange element 4 ;
• 6 a perspective view of a device for detecting a position with a profile element 4
• 7 a perspective view of the device for detecting a position 6 with a housing element
• 8th a perspective detailed view of the profile element 1 with a positioning element;
• 9 a perspective view of the device for detecting a position 7 ;
• 10 a perspective view of the device for detecting a position 7 with an adapter element;
• 11 a perspective view of a position detection system with a device for detecting a position 9 ; and
• 12 a sectional view in top view of the position detection system 11 .

The same or similar reference symbols denote the same or similar features.

1 shows a profile element 100 of a device for detecting a position in cross section. The profile element comprises an elongated body 101 with a substantially equal height H and width B, whereby the cross section is essentially square. The length L of the profile element extends into the plane of the drawing. The profile element 100 is shown here as an example with rounded corners.

The profile element 100 includes a first recess 111, a second recess 112, a third recess 113 and a fourth recess 114, which are arranged on respective sides of the profile element 100.

The profile element 100 also includes a central cavity 115. The central cavity 115 is round, in particular circular, and is arranged in the middle of the square cross section, so that a center point of the central cavity 115 coincides with a center point of the square cross section.

The cavity 115 is designed to be a measuring probe, not shown here, in connection with the 4ff to record the position detection element described and accommodate it therein.

The four recesses 111-114 are arranged symmetrically around the center of the central cavity 115, in particular both point and axis symmetrical. The four recesses 111-114 all have a uniform cross section and extend at least in sections, in particular along the entire length L of the profile element 100. The cross section of the four recesses 111-114 is shown here by way of example as mushroom-shaped or light bulb-shaped. In particular, the cross section of the four recesses consists in sections of two quarter circles, which are connected to one another via a straight section and each of which is followed by a projection. Alternatively, the recesses 111-114 can also be semicircular or three-quarter circular, or even angular, in particular rectangular.

The recesses 111-114 serve, on the one hand, to fasten the profile element 100 Devices and/or systems on which a position is to be measured. In addition, the recesses 111-114 serve to accommodate and secure one or more positioning elements, as described in connection with 8th will be explained in more detail. For this purpose, the recesses have the previously described projections or projections, which enable the profile element 100 to be fastened with suitable corresponding fastening elements. Examples are in this one 1 a first projection 111-1 and a second projection 111-2 are provided with reference numerals.

In addition to the central cavity, the profile element 100 also has a first cavity 116, a second cavity 117, a third cavity 118 and a fourth cavity 119, which are also arranged symmetrically about the center of the cross section of the profile element 100. These cavities serve to save the weight of the profile element 100.

At the in 1 The profile element 100 shown is in particular a profile element 8 from item with a width B of 40 mm, a height H of 40 mm and a length L of 6000 mm, whereby the length can be shortened to the application requirements.

2 shows an alternative, unclaimed embodiment of a profile element 100 'of a device for detecting a position in cross section. The profile element 100 'points differently than in 1 The example shown has a substantially rectangular cross section, with the width B corresponding to approximately twice the height H of the profile element 100 '.

The profile element 100' also has two central cavities, a first central cavity 115 and a second central cavity 125. The central cavities 115, 125 are centrally arranged along a height H of the profile element 100', but along a width B of the profile element spaced apart and offset from a center point.

In particular, the central cavities 115, 125 are spaced apart from one another by half the width B of the profile element 100'. The profile element 100 'is designed to be axially symmetrical to a central vertical axis along the height H. The central cavities 115, 125 are designed to accommodate one or more measuring probes, not shown here, in connection with the 4ff to record the position detection element described and accommodate it therein. In particular, the first central cavity 115 is designed to accommodate a first measuring probe therein and the second central cavity 125 is designed to accommodate a second measuring probe therein.

The profile element 100 'also has, differently, on the left side of the profile only three recesses 111, 113, 114 and two cavities 118 and 119, which correspond to the one in 1 correspond to those shown. In addition, the profile element 100 'has a fifth recess 121, a sixth recess 122 and a seventh recess 123, which correspond to the recesses 111, 113 and 114. Likewise, the profile element 100 'has a fifth cavity 126 and a sixth cavity 127, which correspond to the cavities 118 and 119.

In addition, the profile element 100' has a common cavity 116' which extends over the central vertical axis along the height H. Here too, the cavities serve to save weight and the recesses serve to fasten the profile element 100 'as well as to accommodate and fasten one or more positioning elements therein. In particular, a first positioning element can be arranged in one of the recesses 111, 113 and 114, in particular the recess 111, and a second positioning element can be arranged in one of the recesses 121, 122 and 123, in particular the recess 121. In particular, one positioning element can be arranged in a corresponding recess, for example 111 and 121, 122 and 114 and/or 113 and 123.

At the in 2 The profile element 100' shown is in particular a profile element 8 from item with a width B of 80 mm, a height H of 40 mm and a length L of 6000 mm, whereby the length L can be shortened to the application requirements.

In the following figures there is only a square profile element 100 1 shown. However, it is understood that the described embodiments alternatively or additionally rely on a rectangular profile element 100' 2 can obtain.

3 shows a perspective view of the profile element 100 1 . As in 3 As can be seen, the recesses extend along the length L of the profile element 100.

It is shown how a first fastening element 151 is arranged in the first recess 111 and a second fastening element 153 is arranged in the third recess 113. The fastening elements 151 and 153 are in particular screw elements.

In addition, a profile seal 130 is arranged on the front side of the professional element 100, which protects the profile element 100 from that in the following 4 flange element shown seals.

4 shows a perspective view of the profile element 100 3 with a flange element 210, which is part of a position detection element 200. For this purpose, the flange element 210 has fastening elements 212 which engage in the second recess 112 and the fourth recess and fasten the flange element thereto. In addition, the position detection element has a housing section 221.

5 a perspective rear view of the flange element 210 5 . It can be seen that the flange element 210 has a total of four fastening elements. A first fastening element 211, which is connected to the first fastening element 151 of the profile element 100 as in 3 shown engages and a second fastening element 213, which is connected to the second fastening element 153 of the profile element 100 as in 3 shown intervenes. The fastening elements 211 and 213 are, in particular, screw receiving elements that correspond to the screw elements.

In addition, the flange element 210 also includes a third fastening element 212 and a fourth fastening element 214, each with the recesses 112 and 114 of the profile element 100, as shown in 4 shown to intervene. The fastening elements 212 and 214 are, in particular, locking elements that correspond to the recesses.

The flange element 210 also includes a central recess 215 which leads to the central cavity 115 of the profile element 100 as in 3 shown corresponds.

6 a perspective view of a device 10 for detecting a position with 10 a profile element 100 4 and a position detection element 200. An evaluation unit 220 is arranged in the housing section 221.

Not shown for perspective reasons is a measuring probe of the position detection element 200, which is connected to the evaluation unit 220 and extends from the housing section 221 through the central recess 215 of the flange section 210 as in 5 shown and through the profile seal 130 as in 3 shown extends into the central cavity 115 of the profile element 100 and is arranged therein. The evaluation unit 220 is designed to detect and evaluate a position of a positioning element relative to the measuring probe.

Furthermore, a sealing member 230 is arranged on the housing portion 221 around the evaluation unit 220 together with a housing member as in the following 7 shown to seal.

7 a perspective view of the device 10 for detecting a position 6 with a housing element 250. The housing element 250 encloses both the flange element 210 and the housing section 221 and seals the evaluation unit 220 arranged therein from the environment by means of the profile seal 130 and the sealing element 230.

In addition, the housing member 250 includes a connecting member 260 configured to be an adapter member as follows 10 shown to attach to it.

8th a perspective detailed view of the profile element 1 with a positioning element 230. The positioning element is arranged in the first recess 111 of the profile element 100 and is fastened by a fastening element 231 so that it can move along the length L within the recess 111. For this purpose, the fastening element 231 engages with the first and second projections of the recess 111 or is fastened within the recess by these.

The positioning element 230 also includes a magnetic element 232, which cooperates with the measuring probe arranged in the central cavity 115, whereby the evaluation unit as in 6 shown can detect and evaluate the position of the positioning element 230 relative to the measuring probe.

9 a perspective view of the device 10 for detecting a position 7 . The positioning element 230 is as in 8th shown in the first recess 111 and can move along the entire length L of the profile element in a direction R, whereby a position along the entire length L of the profile element can be detected.

The profile element 100 also has an end cap 180, which seals the interior of the profile element, in particular the measuring probe arranged in the central cavity, from the environment.

10 a perspective view of the device 10 for detecting a position 7 with an adapter element 300. The adapter element 300 is connected by means of the in 7 connection shown elements 260 attached to the position detection element 200.

In addition, the adapter element 300 has fastening elements 311 and 313, by means of which the adapter element 300 and thus the entire device 10 for detecting a position can be fastened to another profile element in order to form a position detection system, as in the following 11 shown.

The fastening elements 311 and 313 are corresponding to the fastening elements 211 and 213 of the position detection element 200 as in 5 shown trained.

The adapter element can also have a cable version, in particular a sealed one, which is not shown for reasons of clarity, and with the aid of which a position signal that is generated by the position detection element can be retrieved.

11 a perspective view of a position detection system 1000 with the device 10 for detecting a position 9 . The device 10 is connected to a further profile element 400 via the adapter element 300 and fastened thereto. The profile element is essentially the same as the profile element 100 as described previously. For this purpose, it has a profile body 401, which also includes recesses 411-414, a central cavity 415 and further cavities 416-419. In the recesses 411 and 413 are the fastening elements 151 and 153 as in 3 Shown corresponding fastening elements 451 and 453 are arranged, which are connected to the fastening elements 311 and 313 of the adapter element 300 as in 10 shown to intervene.

In particular, the length of the first profile element 100 and the further profile element 400 can be tailored in such a way that the position detection system 1000 with the two profile elements 100 and 400 as well as the position detection element 200 and the adapter element 300 has a predetermined length, in particular a standard length such as 6000 mm Profile element 8 from item, which is used as the basis here, so that the position detection system 1000 fits seamlessly into a structure, in particular a base frame made up of several profile elements, and can be connected to these using standard means.

12 a sectional view in top view of the position detection system 11 . It can be seen again in more detail how the respective fastening elements 151 and 211, 153 and 213, 311 and 451 and 313 and 453 engage with one another.

Reference symbol list

10

Device for detecting a position

100

Profile element

100'

Profile element

101

Profile body

101'

Profile body

111

first recess

111-1

first lead

111-2

second lead

112

second recess

113

third recess

114

fourth recess

115

central cavity

116

first cavity

116'

first cavity

117

second cavity

118

third cavity

119

fourth cavity

121

fifth recess

122

sixth recess

123

seventh recess

125

central cavity

126

fifth cavity

127

sixth cavity

130

Profile seal

151

first fastener

153

second fastener

180

End cap

200

Position detection element

210

flange element

211

fastener

212

fastener

213

fastener

214

fastener

215

central recess

220

Evaluation unit

221

Housing section

230

Positioning element

231

fastener

232

Magnetic element

250

Housing element

260

connecting element

300

Adapter element

311

fastener

313

fastener

400

Profile element

401

Profile body

411

first recess

412

second recess

413

third recess

414

fourth recess

415

central cavity

416

first cavity

417

second cavity

418

third cavity

419

fourth cavity

1000

system

b

Width

H

Height

L

length

R

Direction

QUOTES INCLUDED IN THE DESCRIPTION

This list of documents listed by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 102018100516 A1 [0003]
• CN 1884853 A [0003]

Claims (9)

Device (10) for detecting a position, comprising: - a profile element (100) which has a substantially square cross section and an elongated body (101), the profile element having at least a first recess (111) and a central cavity (115). which extends along the length of the body (101); and - a position detection element (200), comprising a measuring probe, a first movable positioning element (230) and an evaluation unit (220), wherein the evaluation unit is designed to detect a position of the first positioning element relative to the measuring probe and wherein the measuring probe is in the central Cavity (115) of the profile element (100) is arranged; characterized in that the first movable positioning element (230) is arranged in the at least one first recess (111) and is movable along it. Device according to Claim 1 , wherein the second movable positioning element (230) is arranged in the at least one second recess (121) and is movable along it. Device according to one of the Claims 1 or 2 , wherein the at least one first recess (111) has a first projection and the first movable positioning element (230) has a fastening element (231) which engages the first projection such that it is movably mounted within the recess along the length of the body . Device according to one of the preceding claims, wherein the at least one first recess (111) has a quarter-circle-shaped cross section in sections, in particular a mushroom-shaped cross section. Device according to one of the preceding claims, wherein the first movable positioning element (230) comprises a magnetic element (232). Device according to Claim 5 , wherein the position detection element (200) detects a position of the positioning element (230) based on the magnetostrictive principle. Device according to one of the preceding claims, wherein the profile element has four recesses (111, 112, 113, 114) which are arranged symmetrically around the central cavity (115). Device according to Claim 7 , wherein the four recesses (111, 112, 113, 114) are arranged in four sides of the square or rectangular cross section. Position detection system (1000), comprising: - a device (10) for detecting a position according to one of Claims 1 until 8th ; - another profile element (400); and - an adapter element (300) which connects the device (10) and the further profile element (400) to one another.

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