Display device and field device

Abstract

The invention relates to a 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 partially planar base body (8), wherein the display module (5) is mechanically connected to the base body (8), 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).

Description

The invention relates to a display device and a field device of process automation.In automation technology, in particular in process automation technology, field devices are often used which serve for the detection and / or influencing of process variables. Sensors are used to record process variables, which are integrated, for example, in fill level measuring devices, flow measuring devices, pressure and temperature measuring devices, pH redox potential measuring devices, conductivity measuring devices, etc., which record the corresponding process variables fill level, flow rate, pressure, temperature, pH value or conductivity. Actuators, such as valves or pumps, are used to influence process variables, by means of which the flow of a liquid in a pipeline section or the fill level in a container can be changed. Field devices are in principle all devices that are used close to the process and supply or process the process-relevant information. In connection with the invention, field devices are thus also understood to mean remote I / Os, radio adapters or generally electronic measurement components which are arranged on the field level.A field device is selected in particular from a group consisting of flow measuring devices, fill level measuring devices, pressure measuring devices, temperature measuring devices, limit level measuring devices and / or analysis measuring devices.Flow measuring devices are in particular Coriolis, ultrasonic, vortex, thermal and / or magnetic inductive flow measuring devices.Fill level measurement devices are in particular radar-based fill level measurement devices, microwave fill level measurement devices, ultrasonic fill level measurement devices, time-domain reflectometric fill level measurement devices, radiometric fill level measurement devices, capacitive fill level measurement devices, inductive fill level measurement devices and / or temperature-sensitive fill level measurement devices.Pressure measuring devices are in particular absolute, relative or differential pressure devices.Temperature measuring devices are in particular measuring devices with thermocouples and / or temperature-dependent resistors.Limit level measurement devices are in particular vibronic limit level measurement devices, ultrasonic limit level measurement devices and / or capacitive limit level measurement devices.Analysis measuring instruments are in particular pH sensors, conductivity sensors, oxygen and active oxygen sensors, (spectro) photometric sensors, and / or ion-selective electrodes.Field devices usually have a measurement pickup which has the sensor components for ascertaining a measurement signal dependent on the process variable to be monitored, and a measurement transmitter for ascertaining the process variable as a function of the measurement signal. The measurement transmitter usually has a display device with a display module for outputting the process information to the operator. Since, in the case of a very compact design of the display device, the display module is arranged very close to the display pane, this can be damaged in the event of impacts on the display window.The object of the invention is to provide a remedy for the problem.The object is achieved by the display device according to claim 1 and the field device according to claim 8.The display device according to the invention, comprising:a housing having a housing opening,a transparent display window which is inserted in the housing opening,a display module,a window holder of the display window, which is connected to the housing, wherein the window holder has a base body which is planar in sections, wherein the display module is mechanically connected to the base body, wherein the window holder comprises at least one resiliently configured spacer, wherein the at least one spacer and the base body are monolithically configured, wherein the window holder has a window holder opening, wherein the display module extends through the window holder opening.Advantageous embodiments of the invention are the subject matter of the dependent claims.One embodiment provides that the spacer is designed as a bead, (threaded) bridge, shoulder, half-hinge, gill, tab or cup.One embodiment provides that the base body is designed as a sheet metal part.One configuration provides that the base body comprises carbon fiber.One embodiment provides that the base body is formed at least in sections from a plastic or comprises a plastic.One embodiment provides that the base body has a slot in addition to the spacer.One embodiment provides that a resilient element, in particular a sealing and resilient sealing element, is arranged between the housing and the display glass.The field device of process automation according to the invention comprises:a measuring sensor for determining at least one measurement signal; anda measurement transmitter for transforming the at least one measurement signal into at least one process variable and for outputting the at least one process variable, wherein the measurement transducer comprises a display device according to the invention.The invention is explained in more detail with reference to the following figures. It shows: FIG. 1 : a perspective view of an embodiment of the window holder; FIG. 2 shows a cross section through an embodiment of the display device; and FIG. 3 : shows a perspective view of an embodiment of the field device of process automation.Some aspects of the present disclosure will be described in more detail below with reference to the accompanying drawings. The figures show some, but not all, embodiments of the disclosure. Indeed, these disclosures may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Different embodiments, each of which shows individual details of the subject matter according to the invention, can be combined with one another to form new embodiments not shown in the figures. Like numbers refer to like elements throughout.The components depicted in the figures represent components that may or may not be present in various embodiments of the present disclosure described herein, such that the embodiments may include fewer or more components than those depicted in the figures without departing from the scope of the present disclosure. Some components may be omitted from one or more figures or shown in phantom to visualize the underlying components.The terms "in an exemplary embodiment," "some embodiments," "various embodiments," and the like generally mean that the particular feature, structure, or characteristic following the term 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 terms need not necessarily refer to the same configuration.The word "example" or "exemplary" is used herein in the sense of "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.When the description of the figures indicates that a component, component, or feature is included or "may be included (or some other such formulation), "preferably", "possibly", "typically", "optionally", or "for example" (or some other such formulation), a feature may have a property "could" or "should", it is not necessary that a particular component or feature be included or have the feature. Such components or features may be optionally included in some embodiments, but may also be excluded. A configuration not included in the figures can also include all features-insofar as they do not conflict-of the shown configurations.FIG. 1 shows a perspective view of an embodiment of the window holder 6. 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 the form-fit and / or force-fit connection of the window holder 6 to the housing 6. Alternatively, the window holder 6 can be connected to the housing in a materially integral manner.The window holder 6 has a base body 8 which is planar in sections. The display module 5 can be directly or indirectly connected to the base body 8. The base body 8 can be, for example, a sheet metal part. Alternatively, the base body can comprise carbon fiber and / or a plastic.According to the invention, the window holder 6 has at least one resiliently embodied spacer 7, which is monolithically embodied 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 means of forming to DIN 8580. Thus, the at least one spacer 7 can be designed, for example, as a bead, (threaded) bridge, shoulder, half-hinge, gill, tab or cup. Furthermore, a slot 10 can be incorporated into the base body 8 in addition 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 display, extends.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. A transparent display window 4 is inserted into the housing opening and can be formed from glass or a plastic. A display film 15 for protection against scratches can be arranged on the display window 4. The display module 5, in particular the display display 13, is visible through the display window 4.The display window 4 is fixed to the housing 2 via a window holder 6. The window holder 6 is configured to hold the display glass 4 and also to protect the display display when forces act 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 the form-fit and / or force-fit connection of the window holder 6 to the housing 6. Alternatively, the window holder 6 can be connected to the housing in a materially integral manner.The window holder 6 has a base body 8 which is planar in sections. The display module 5 can be directly or indirectly connected to the base body 8. The base body 8 can be, for example, a sheet metal part. Alternatively, the base body 8 can comprise carbon fiber and / or a plastic.According to the invention, the window holder 6 has at least one resiliently embodied spacer 7, which is monolithically embodied 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 means of forming to DIN 8580. Thus, the at least one spacer 7 can be designed, for example, as a bead, (threaded) bridge, shoulder, half-hinge, gill, tab or cup. Furthermore, a slot 10 can be incorporated into the base body 8 in addition 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 5, in particular the display display 13, extends. The display display 13 is arranged on a printed circuit board 14, on which electronic components for operating and controlling the display 13 can also be arranged.Between the housing 2 and the display glass 4 a resilient element 11 is arranged. This is configured to seal the housing opening 3. The resilient element 11 can be a sealing and resilient sealing element. An O-ring is suitable as a common sealing element.FIG. 3 shows a perspective view of an embodiment of the field device 101 of the process automation. The field device 101 comprises a measurement pickup MA for ascertaining at least one measurement signal. The measurement signal can be a voltage or current signal. Alternatively, the measurement signal can be digital data. The depicted measurement transmitter is a magneto-inductive flowmeter.The field device 101 furthermore comprises a measurement transmitter MU for transforming 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-speed-dependent measured variable. The measuring transducer MU is arranged remote from the measuring transducer MA and is in communication or contact with the latter via an electrical connection EV. According to the invention, the measurement transmitter MU has a display device 1 according to the invention (see FIG. 2 ).

Claims

Display device (1) comprising: - a housing (2) having a housing opening (3), - a transparent display window (4) which is inserted in 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 planar in sections, wherein the window holder (6) comprises at least one resiliently designed spacer (7), wherein the at least one spacer (7) and the base body (8) are monolithically formed, wherein the window holder (6) has a window holder opening (9), wherein the display module (5) extends through the window holder opening (9).Display device (1) according to Claim 1, wherein the spacer (7) is designed as a bead, (threaded) bridge, shoulder, half-hinge, gill, tab or cup.Display device (1) according to one of the preceding claims, wherein the base body (8) is designed as a sheet metal part.The display device (1) according to any one of the preceding claims, wherein the base body (8) comprises carbon fiber.Display device (1) according to one of the preceding claims, wherein the base body (8) is formed at least in sections from a plastic or comprises a plastic.Display device (1) according to one of the preceding claims, wherein the base body (8) has a slot (10) next to the spacer (7).Display device (1) according to one of the preceding claims, wherein a resilient element (11), in particular a sealing and flexible sealing element, is arranged between the housing (2) and the display glass (4).Field device (101) of process automation, comprising: - a measurement pickup (MA) for determining at least one measurement signal; and - a measurement transmitter (MU) for transforming the at least one measurement signal into at least one process variable and for outputting the at least one process variable, wherein the measurement transmitter comprises a display device (1) according to one of the preceding claims.

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