Display device and field device

Abstract

The invention relates to a display device (1) comprising: - a housing (2) having a housing opening (3), - a transparent display window (4) which has been inserted into the housing opening (3), - a display module (5), - a window holder (6), connected to the housing (2), for the display window (4), wherein the window holder (6) has a main body (8) formed in a planar manner in certain portions, wherein the display module (5) is mechanically connected to the main body (8), wherein the window holder (6) comprises at least one spacer (7) formed in a resilient manner, wherein the at least one spacer (7) and the main body (8) are formed in one piece, wherein the window holder (6) has a window-holder opening (9), wherein the display module (5) extends through the window-holder opening (9).

Description

[0001] Display device and field device

[0002] The invention relates to a display device and a field device for process automation.

[0003] In automation technology, particularly in process automation technology, field devices are often used to record and / or influence process variables. Sensors integrated into, for example, level measuring devices, flow meters, pressure and temperature measuring devices, pH-redox potential measuring devices, conductivity measuring devices, etc., are used to record process variables. These sensors record the corresponding process variables: level, flow, pressure, temperature, pH value, or conductivity. Actuators such as valves or pumps are used to influence process variables; they can be used to change the flow of a liquid in a pipe section or the fill level in a container. Field devices are essentially all devices that are used close to the process and that supply or process process-relevant information.In the context of the invention, field devices also include remote I / Os, radio adapters or generally electronic measuring components that are arranged at the field level.

[0004] A field device is in particular selected from a group consisting of flow measuring devices, level measuring devices, pressure measuring devices, temperature measuring devices, point level measuring devices and / or analytical measuring devices.

[0005] Flow meters include, in particular, Coriolis, ultrasonic, vortex, thermal and / or magnetic-inductive flow meters.

[0006] Level measuring devices include, in particular, radar-based level measuring devices, microwave level measuring devices, ultrasonic level measuring devices, time-domain reflectometric level measuring devices, radiometric level measuring devices, capacitive level measuring devices, inductive level measuring devices and / or temperature-sensitive level measuring devices.

[0007] Pressure measuring instruments are in particular absolute, relative or differential pressure devices.

[0008] Temperature measuring devices are in particular measuring devices with thermocouples and / or temperature-dependent resistors.

[0009] Point level measuring devices include, in particular, vibronic point level measuring devices, ultrasonic point level measuring devices and / or capacitive point level measuring devices.

[0010] Analytical measuring devices include, in particular, pH sensors, conductivity sensors, oxygen and active oxygen sensors, (spectro)photometric sensors, and / or ion-selective electrodes.

[0011] Field devices typically comprise a sensor, which contains the sensor components for determining a measurement signal dependent on the process variable to be monitored, and a transmitter for determining the process variable based on the measurement signal. The transmitter typically comprises a display device with a display module for outputting process information to the operator. Since the display module is located very close to the display window in a very compact design, it can be damaged if the display window is impacted.

[0012] The invention is based on the object of remedying the problem.

[0013] The object is achieved by the display device according to claim 1 and the field device according to claim 8.

[0014] The display device according to the invention, comprising:

[0015] - a housing with a housing opening,

[0016] - a transparent display window, which is inserted into the housing opening,

[0017] - a display module,

[0018] - a window holder of the display window, which is connected to the housing, wherein the window holder has a partially planar base body, wherein the display module is mechanically connected to the base body, wherein the window holder comprises at least one resilient spacer, wherein the at least one spacer and the base body are monolithic, wherein the window holder has a window holder opening, wherein the display module extends through the window holder opening.

[0019] Advantageous embodiments of the invention are the subject of the subclaims.

[0020] One embodiment provides that the spacer is designed as a bead, (threaded) bridge, offset, half hinge, gill, tab or cup.

[0021] One embodiment provides that the base body is designed as a sheet metal part.

[0022] One embodiment provides that the base body comprises carbon fiber.

[0023] One embodiment provides that the base body is formed at least partially from a plastic or comprises a plastic. One embodiment provides that the base body has a slot next to the spacers.

[0024] One embodiment provides that a resilient element, in particular a sealing and flexible sealing element, is arranged between the housing and the display glass.

[0025] The process automation field device according to the invention comprises:

[0026] - a measuring sensor for determining at least one measuring signal; and

[0027] - a measuring transducer for converting the at least one measuring signal into at least one process variable and for outputting the at least one process variable, wherein the measuring transducer comprises a display device according to the invention.

[0028] The invention is explained in more detail with reference to the following figures. They show:

[0029] Fig. 1 : a perspective view of an embodiment of the window holder;

[0030] Fig. 2 : a cross-section through an embodiment of the display device; and

[0031] Fig. 3 : a perspective view of an embodiment of the field device of the process automation.

[0032] Some embodiments of the present disclosure are described in more detail below with reference to the accompanying figures. The figures illustrate some, but not all, embodiments of the disclosure. Indeed, these disclosures may be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein. Different embodiments, each illustrating individual details of the inventive subject matter, may be combined with one another to form new embodiments not shown in the figures. Like numbers refer to like elements throughout.

[0033] The components illustrated in the figures represent components that may or may not be present in various embodiments of the present disclosure described herein, so that the embodiments may include fewer or more components than those illustrated in the figures without departing from the scope of the present disclosure. Some components may be omitted or shown in phantom in one or more figures to reveal underlying components.

[0034] The phrases "in an exemplary embodiment," "some embodiments," "various embodiments," and the like generally mean that the particular feature, structure, or characteristic following the phrase may be included in at least one embodiment of the present disclosure and may be included in more than one embodiment of the present disclosure. Such phrases do not necessarily refer to the same embodiment.

[0035] The word "example" or "exemplary" is used herein to mean "serving as an example or illustration." Any implementation described herein as "exemplary" is not necessarily to be understood as preferred or advantageous over other implementations.

[0036] If the description of the figures states that a component, part, or feature is "preferably," "possibly," "typically," "optionally," or "for example" (or other such wording) included, or that a feature "may" be included, or that a feature "could" or "should" have a property, it is not required that a specific component or feature be included or exhibit the feature. Such components or features may be optionally included in some embodiments, but they may also be excluded. An embodiment not included in the figures may also include all features—provided they do not contradict each other—of the embodiments shown.

[0037] Fig. 1 shows a perspective view of one embodiment of the window mount 6. The window mount 6 is configured to attach a display window to the housing. The window mount 6 itself is mechanically connected to the housing. For this purpose, the window mount 6 can have at least one opening 12 through which a connecting element extends for positively and / or non-positively connecting the window mount 6 to the housing 6. Alternatively, the window mount 6 can be integrally connected to the housing.

[0038] The window mount 6 has a partially planar base body 8. The display module 5 can be connected directly or indirectly to the base body 8. The base body 8 can be a sheet metal part, for example. Alternatively, the base body can comprise carbon fiber and / or a plastic.

[0039] According to the invention, the window holder 6 has at least one resilient spacer 7, which is formed monolithically with the base body 8. This means that the at least one spacer 7 is formed from the base body 8, in particular from a partial region in which the base body 8 is planar. This can be done by forming according to DIN 8580. For example, the at least one spacer 7 can be designed as a bead, (threaded) bridge, offset, half-hinge, gill, tab or cup. Furthermore, a slot 10 can be incorporated into the base body 8 next to the at least one spacer 7 in order to increase the resilient property of the at least one spacer 7. The window holder 6 has a window holder opening 9, through which the display module, in particular the display, extends.

[0040] Fig. 2 shows a cross-section through an embodiment of the display device 1, which is configured to display the determined process variable. The display device 1 comprises a housing 2 with a housing opening 3. The housing opening 3 can be designed, for example, as a through-hole in the housing wall. A transparent display window 4 is inserted into the housing opening. This can be made of glass or a plastic. A display film 15 can be arranged on the display window 4 to protect against scratches. The display module 5, in particular the display 13, is visible through the display window 4.

[0041] The display window 4 is attached to the housing 2 via a window holder 6. The window holder 6 is designed to hold the display glass 4 and also to protect the display from forces acting on the display window 4. The window holder 6 itself is mechanically connected to the housing. For this purpose, the window holder 6 can have at least one opening 12 through which a connecting element extends for positively and / or non-positively connecting the window holder 6 to the housing 6. Alternatively, the window holder 6 can be integrally connected to the housing.

[0042] The window mount 6 has a partially planar base body 8. The display module 5 can be connected directly or indirectly to the base body 8. The base body 8 can be a sheet metal part, for example. Alternatively, the base body 8 can comprise carbon fiber and / or a plastic.

[0043] According to the invention, the window holder 6 has at least one resilient spacer 7, which is formed monolithically with the base body 8. This means that the at least one spacer 7 is formed from the base body 8, in particular from a partial region in which the base body 8 is planar. This can be done by forming according to DIN 8580. For example, the at least one spacer 7 can be designed as a bead, (threaded) bridge, offset, half-hinge, gill, tab or cup. Furthermore, a slot 10 can be incorporated into the base body 8 next to the at least one spacer 7 in order to increase the resilient property of the at least one spacer 7.

[0044] The window mount 6 has a window mount opening 9 through which the display module 5, in particular the display 13, extends. The display 13 is arranged on a circuit board 14, on which electronic components for operating and controlling the display 13 can also be arranged.

[0045] A resilient element 11 is arranged between the housing 2 and the display glass 4. This element is designed to seal the housing opening 3. The resilient element 11 can be a sealing and flexible sealing element. An O-ring is a common sealing element.

[0046] Fig. 3 shows a perspective view of an embodiment of the field device 101 of the process automation system. The field device 101 comprises a sensor MA for detecting at least one measurement signal. The measurement signal can be a voltage or current signal. Alternatively, the measurement signal can be digital data. The measuring transducer shown is a magnetic-inductive flowmeter.

[0047] Furthermore, the field device 101 comprises a measuring transducer MU for converting the at least one measurement signal into at least one process variable and for outputting the at least one process variable. The process variable can be a flow velocity-dependent measured variable. The measuring transducer MU is arranged separately from the measuring sensor MA and is in communication or contact with it via an electrical connection EV. According to the invention, the measuring transducer MU has a display device 1 according to the invention (see Fig. 2).

Claims

PATENT CLAIMS 1. Display device (1), comprising: - a housing (2) with a housing opening (3), - a transparent display window (4) which is inserted into the housing opening (3), - a display module (5), - a window holder (6) of the display window (4), which is connected to the housing (2), wherein the window holder (6) has a base body (8) which is partially planar, wherein the window holder (6) comprises at least one resilient spacer (7), wherein the at least one spacer (7) and the base body (8) are monolithic, wherein the window holder (6) has a window holder opening (9), wherein the display module (5) extends through the window holder opening (9).

2. Display device (1) according to claim 1, wherein the spacer (7) is designed as a bead, (threaded) bridge, offset, half-hinge, gill, tab or cup.

3. Display device (1) according to one of the preceding claims, wherein the base body (8) is designed as a sheet metal part.

4. Display device (1) according to one of the preceding claims, wherein the base body (8) comprises carbon fiber.

5. Display device (1) according to one of the preceding claims, wherein the base body (8) is formed at least partially from a plastic or comprises a plastic.

6. Display device (1) according to one of the preceding claims, wherein the base body (8) has a slot (10) next to the spacer (7).

7. Display device (1) according to one of the preceding claims, wherein a resilient element (11), in particular a sealing and resilient sealing element, is arranged between the housing (2) and the display glass (4).

8. Field device (101) for process automation, comprising: - a measuring sensor (MA) for determining at least one measuring signal; and - a measuring transducer (MU) for converting the at least one measuring signal into at least one process variable and for outputting the at least one process variable, wherein the measuring transducer comprises a display device (1) according to one of the preceding claims.

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