EP0538968B1 - Electronically controlled switching relay - Google Patents

Electronically controlled switching relay Download PDF

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Publication number
EP0538968B1
EP0538968B1 EP92250261A EP92250261A EP0538968B1 EP 0538968 B1 EP0538968 B1 EP 0538968B1 EP 92250261 A EP92250261 A EP 92250261A EP 92250261 A EP92250261 A EP 92250261A EP 0538968 B1 EP0538968 B1 EP 0538968B1
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EP
European Patent Office
Prior art keywords
potentiometer
electronically controlled
value
measurable variable
setting
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EP92250261A
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German (de)
French (fr)
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EP0538968A1 (en
Inventor
Karl D. Friedrich
Gerd.-L. Metzner
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Schleicher GmbH and Co Relais Werke KG
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Schleicher GmbH and Co Relais Werke KG
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    • GPHYSICS
    • G04HOROLOGY
    • G04GELECTRONIC TIME-PIECES
    • G04G15/00Time-pieces comprising means to be operated at preselected times or after preselected time intervals
    • G04G15/006Time-pieces comprising means to be operated at preselected times or after preselected time intervals for operating at a number of different times

Definitions

  • the invention relates to an electronically controlled switching relay.
  • Electronically controlled switching relays can be designed as time, measuring and monitoring relays. Time relays are used, for example, in control systems or the like for a wide variety of switching operations.
  • the electronic timing relay can be designed as a multifunction device or as a monofunction device.
  • a multi-function device can operate as a delayed or delayed relay, as a switch-on wiper or a clock generator.
  • an electronic time relay according to the prior art has different time ranges and different adjustable end times.
  • An electronically controlled switching relay is manufactured by the applicant as a digital time relay, in which the preselectable time is set using coding switches.
  • the elapsing time is indicated by a digital numerical display, the time being counted down according to a counter from the time preset with the coding switches and possibly also from these, until it reaches zero time at which a signal is emitted.
  • the coding switches which provide very precise specifications in a digital manner, are expensive, so that they have a noticeable effect on the costs of an electronic timing relay.
  • EP-AO 425 749 describes an electronically controlled switching relay with a display device, a measuring circuit for detecting a measured variable, a device for setting a preselectable value of the measured variable, an A / D converter and a control circuit, the control circuit including the instantaneous value of the measured variable compares the preselectable value and emits a switching signal if they are the same.
  • the display device shows the operating state of the switching relay.
  • the device for setting the preselectable value of the measured variable has a potentiometer and one with the tap of the potentiometer and setting pointer interacting with a scale, the potentiometer being set to 1/2 or 1/4, for example, to preselect half an hour or a quarter of an hour. Several time ranges can be preselected using a counter.
  • the potentiometer used is Although inexpensive, due to the reading of the voltage value to be set on the scale assigned to the potentiometer, a precise setting on the part of the user is not possible.
  • GB-A-2 052 111 discloses a timer with a display device which has a multiplicity of liquid crystal segments, the segments being designed in the form of a pointer or as full segments in different exemplary embodiments.
  • the preset time can be displayed as a fixed pointer and the elapsing time can be displayed with different segments that simulate a moving pointer.
  • the specification for the time to be set is carried out using two counters for minutes in tens and units, whereby it is not described how to set. However, due to the two counters, the setting appears to be somewhat more complex.
  • the invention has for its object to provide an electronically controlled switching relay that enables a cost-effective and yet accurate setting of the desired preselectable values of the measured variables, with a clearly visible display of the set values and the instantaneous values of the measured variable should be provided with good accuracy .
  • the electronically controlled switching relay is provided with a measuring circuit, a control circuit, a device containing a potentiometer for setting a preselectable value of the measured variable and a display device having a scale and a setting pointer.
  • a numerical display is provided, which shows the set Displays the value and / or the instantaneous value of the measured variable.
  • the control circuit converts the analog signal of the preselectable value, which is emitted by the potentiometer, into an digital signal via an A / D converter, which controls the digital numerical display, and compares an instantaneous value of the measured variable detected by the measuring circuit with the preset value, and gives equality a signal.
  • the display device has a plurality of radiation sources arranged next to one another, each of which can be controlled by the control circuit depending on the instantaneous value of the measured variable in such a way that they form a movable analog pointer.
  • the advantages of a digital switching relay which consist in the precise specification of the presettable value or the instantaneous value of the measured variable and good reproducibility, can be combined with the advantages of an analog switching relay in the inexpensive and rapid presetting of the preselectable value of the measured variable without the need for a Storage (eg coding switch or electrical memory) of the preset value of the measured variable and better visibility of the instantaneous value can be combined.
  • a Storage eg coding switch or electrical memory
  • an emotional and quick adjustment or adjustment of the preselectable value of the measured variable can be carried out.
  • the radiation sources simulating the movable pointer are easy and clear to read, so that with continuously increasing or decreasing values of the measured variable it is possible to determine with just a short glance how the status is.
  • the control circuit is preferably designed as a microprocessor or computer, the microprocessor or computer and the potentiometer for setting the preselectable value are at a common constant voltage. As a result, voltage fluctuations can have no influence on the setting of the preselectable value of the measured variable.
  • a potentiometer can be used, the costs for the manufacture of the electronically controlled switching relay can be reduced, whereby inexpensive potentiometers can be used by displaying the preselectable value set by the potentiometer on the numerical display, because an exact assignment of the measurement scale to the set voltage values is not necessary.
  • the electronically controlled switching relay according to the invention will be described using the example of a timing relay.
  • a display device 1 which has a time scale division 2.
  • a large transparent setting button 3 is provided, which is connected to the axis 4 of a potentiometer.
  • a preselection pointer 5 is attached, which indicates the preselected and set time.
  • the scale divisions 2 are formed by light-emitting diodes 6, a plurality of light-emitting diodes 6 being arranged next to one another to represent a line or a bar, and the light-emitting diodes are designed in the form of lines or bars.
  • the light-emitting diodes 6 forming the scale division are driven one after the other depending on the elapsing time, so that they simulate a sequence pointer.
  • further light-emitting diodes 6 can be provided between the scale divisions shown in FIG. 1, which improves the representation of the flow pointer.
  • a digital numerical display 8 is provided, via which both the set desired time (preselection time) and the time running after the start of the time relay are displayed can be.
  • light-emitting diodes 9 are provided.
  • the adjustment button 3 is so large that all elements are under the button 3, wherein it is sealed against the end wall of the relay.
  • the basic circuit diagram shown in FIG. 2 shows a microcomputer or processor 7 which is connected to a fixed supply voltage Vcc-GND.
  • the setting potentiometer R1 for the preselection time is likewise connected to the fixed voltage with its two connections, the tap of the potentiometer being located at an input of the microcomputer 7 and being connected to the microcomputer-internal A / D converter.
  • the potentiometer R1 is used to set the preselection time after which a certain event should occur.
  • An analog current signal which is a measure of the preselection time, is thus present at the input of the microcomputer 7 connected to the potentiometer R1.
  • the microcomputer 7 also has a clock generator or a time circuit which specifies the elapsing time.
  • the microprocessor 7 is connected to the light-emitting diodes 6, only a few of which are shown, and to the digital numerical display 8, and in the event that the microcomputer 1 supplies serial signals, a driver is provided which converts the serial signals into BCD signals .
  • the operation of the circuit shown is as follows.
  • the desired time is set on the potentiometer R1, the microcomputer taking its input or queries its inputs. This query can, for example, take place in cycles.
  • the set time is shown on the display device 1 via the preselection pointer 5.
  • the signal supplied by the potentiometer R1 is converted into digital signals in the A / D converter of the microcomputer 1 and the digital signals present at the outputs of the microcomputer 7 directly or via the driver control the numerical display device 8 at which the preset time set is digital is shown.
  • the preselection time can thus be set very precisely since the voltage or current value sensed on the potentiometer R1 can be read directly on the display 8.
  • the microcomputer After starting the time relay, the microcomputer compares the elapsed or remaining time determined by the clock generator with predetermined time values and, depending on this result, controls the light-emitting diodes 6 in accordance with the scale division. At the same time, the elapsing or remaining time can be shown on the display device 8. Furthermore, the elapsing time is compared by the microcomputer 1 with the preselection time and, in the case of equality, a signal is emitted at its output which triggers certain events.
  • this preset time can be changed by turning the adjusting knob 3 or the potentiometer R1, since the potentiometer R1 itself is connected as a "memory" of the preselection time is.
  • a further potentiometer R2 is provided in parallel to the potentiometer R1 and can be used, for example, to set the time range or powers of ten, the one set by the microcomputer 7 in each case Time range in which the preselection time set via potentiometer R1 is taken into account. Depending on the setting of the time range, the LEDs 9 are activated.
  • the potentiometer R2 can be provided on the rear face of the time relay, since the time range setting is usually made once by the user.
  • the setting element of the potentiometer R2 is preferably specially designed for setting the time range.
  • the adjusting element is a locking pin which cooperates with a sleeve with depressions, in such a way that the locking pin engages in each case in one depression, as a result of which the locking positions are predetermined. Depending on the number of time ranges to be set, corresponding locking positions are provided. This enables the analog potentiometer R2 to be set "digitally". However, other setting elements for the time ranges can also be provided.
  • control and the time switching are implemented by a microcomputer; of course, a microprocessor with a corresponding external circuit can also be provided, or separate discrete circuits can be connected.
  • the electronically controlled switching relay according to the invention has been described with the aid of a time relay, ie the measured variable is time.
  • the invention applies in a corresponding manner to other types of switching relays, for example measuring and monitoring relays, the measured variable being, for example, a temperature, a Speed, voltage, current, frequency, level, angle, or the like.

Abstract

An electronically controlled switching relay is proposed which comprises a measuring circuit, a control circuit, a device for setting a preselectable value of a measured variable, which has a potentiometer and a display element dependent on the potentiometer, and a display device which is provided with a scale and a moving pointer. The control circuit converts the analog setting signal, output by the potentiometer, of the preselectable value of the measured variable via an A/D converter into a digital signal, and compares an instantaneous value, prescribed by the measuring circuit, of the measured variable with the set preselectable value and outputs a signal in the event of equality. The display device has a plurality of radiation sources which are in each case driven by the control circuit as a function of the instantaneous value in such a way that they simulate a moving pointer. <IMAGE>

Description

Die Erfindung betrifft ein elektronisch gesteuertes Schaltrelais.The invention relates to an electronically controlled switching relay.

Elektronisch gesteuerte Schaltrelais können als Zeit-, Meß- und Überwachungsrelais ausgebildet sein. Zeitrelais werden beispielsweise in Steuerungen oder dergleichen für die unterschiedlichsten Schaltvorgänge verwendet. Das elektronische Zeitrelais kann dabei als Mehrfunktionsgerät oder als Monofunktionsgerät ausgebildet sein. Beispielsweise kann ein Mehrfunktionsgerät als ansprechverzögertes oder rückfallverzögertes Relais, als Einschaltwischer oder Taktgeber arbeiten. Darüber hinaus weist ein elektronisches Zeitrelais nach dem Stand der Technik unterschiedliche Zeitbereiche und unterschiedliche einstellbare Endzeiten auf.Electronically controlled switching relays can be designed as time, measuring and monitoring relays. Time relays are used, for example, in control systems or the like for a wide variety of switching operations. The electronic timing relay can be designed as a multifunction device or as a monofunction device. For example, a multi-function device can operate as a delayed or delayed relay, as a switch-on wiper or a clock generator. In addition, an electronic time relay according to the prior art has different time ranges and different adjustable end times.

Ein elektronisch gesteuertes Schaltrelais wird von der Anmelderin als digitales Zeitrelais hergestellt, bei dem die vorwählbare Zeit mit Kodierschaltern eingestellt wird. Die ablaufende Zeit wird von einer digitalen Ziffernanzeige angezeigt, wobei die Zeit von der mit den Kodierschaltern voreingestellten und gegebenenfalls auch von diesen angezeigten Zeit entsprechend einem Zähler abwärts gezählt wird, bis sie die Zeit Null erreicht, bei der ein Signal abgegeben wird. Die Kodierschalter, die sehr genaue Vorgaben in digitaler Weise zur Verfügung stellen, sind teuer, so daß sie die Kosten eines elektronischen Zeitrelais merkbar beeinflussen.An electronically controlled switching relay is manufactured by the applicant as a digital time relay, in which the preselectable time is set using coding switches. The elapsing time is indicated by a digital numerical display, the time being counted down according to a counter from the time preset with the coding switches and possibly also from these, until it reaches zero time at which a signal is emitted. The coding switches, which provide very precise specifications in a digital manner, are expensive, so that they have a noticeable effect on the costs of an electronic timing relay.

Bei vielen Anwendungsfällen von Zeitrelais ist es erwünscht, daß die ablaufende Zeit bzw. die noch verbleibende Zeit auf einen Blick erkennbar und erfaßbar sein soll, um einzuschätzen, ob noch Handgriffe oder andere Tätigkeiten durchgeführt werden können. Viele Anwender wünschen aus diesem Grunde eine analoge Anzeige, die eine schnelle Erfassung der noch verbleibenden Zeit ermöglicht. Entsprechende Wünsche gelten für andere elektronisch gesteuerte Schaltrelais.In many applications of time relays, it is desirable that the elapsing time or the remaining time should be recognizable and recordable at a glance in order to assess whether manipulations or other activities can still be carried out. For this reason, many users want an analog display that enables the remaining time to be recorded quickly. Corresponding requests apply to other electronically controlled switching relays.

Die EP-A-O 425 749 beschreibt ein elektronisch gesteuertes Schaltrelais mit einer Anzeigevorrichtung, einer Meßschaltung zur Erfassung einer Meßgröße, einer Vorrichtung zum Einstellen eines vorwählbaren Wertes der Meßgröße, einen A/D-Wandler und einer Steuerschaltung, wobei die Steuerschaltung den Augenblickswert der Meßgröße mit dem vorwählbaren Wert vergleicht und bei Gleichheit ein Schaltsignal abgibt. Die Anzeigevorrichtung zeigt den Betriebszustand des Schaltrelais an. Die Vorrichtung zum Einstellen des vorwählbaren Wertes der Meßgröße weist ein Potentiometer und einen mit dem Abgriff des Potentiometers und mit einer Skala zusammenwirkenden Einstellzeiger auf, wobei das Potentiometer beispielsweise auf 1/2 oder 1/4 eingestellt wird, um eine halbe oder viertel Stunde vorzuwählen. Über einen Zähler sind mehrere Zeitbereiche vorwählbar. Das verwendete Potentiometer ist zwar kostengünstig, aber aufgrund der Ablesung des einzustellenden Spannungswertes auf der dem Potentiometer zugeordneten Skala ist eine präzise Einstellung seitens des Benutzers nicht möglich.EP-AO 425 749 describes an electronically controlled switching relay with a display device, a measuring circuit for detecting a measured variable, a device for setting a preselectable value of the measured variable, an A / D converter and a control circuit, the control circuit including the instantaneous value of the measured variable compares the preselectable value and emits a switching signal if they are the same. The display device shows the operating state of the switching relay. The device for setting the preselectable value of the measured variable has a potentiometer and one with the tap of the potentiometer and setting pointer interacting with a scale, the potentiometer being set to 1/2 or 1/4, for example, to preselect half an hour or a quarter of an hour. Several time ranges can be preselected using a counter. The potentiometer used is Although inexpensive, due to the reading of the voltage value to be set on the scale assigned to the potentiometer, a precise setting on the part of the user is not possible.

Die GB-A-2 052 111 offenbart eine Zeitschaltuhr mit einer Anzeigevorrichtung, die eine Vielzahl von Flüssigkristallsegmenten aufweist, wobei in unterschiedlichen Ausführungsbeispielen die Segmente zeigerförmig oder als Vollsegmente ausgebildet sind. Beispielsweise kann die voreingestellte Zeit als fester Zeiger und die ablaufende Zeit jeweils mit unterschiedlichen Segmenten, die einen beweglichen Zeiger simulieren, angezeigt werden. Die Vorgabe für die einzustellende Zeit wird über zwei Zähler für Minuten im Zehner- und Einsermaß durchgeführt, wobei nicht beschrieben wird, wie eingestellt wird. Aufgrund der zwei Zähler scheint die Einstellung jedoch etwas aufwendiger zu sein.GB-A-2 052 111 discloses a timer with a display device which has a multiplicity of liquid crystal segments, the segments being designed in the form of a pointer or as full segments in different exemplary embodiments. For example, the preset time can be displayed as a fixed pointer and the elapsing time can be displayed with different segments that simulate a moving pointer. The specification for the time to be set is carried out using two counters for minutes in tens and units, whereby it is not described how to set. However, due to the two counters, the setting appears to be somewhat more complex.

Der Erfindung liegt die Aufgabe zugrunde, ein elektronisch gesteuertes Schaltrelais zu schaffen, das eine kostengünstige und trotzdem genaue Einstellung der gewünschten vorwählbaren Werte der Meßgrößen ermöglicht, wobei eine gut sichtbare Anzeige der eingestellten Werte und der Augenblickswerte der Meßgröße bei guter Genauigkeit zur Verfügung gestellt werden soll.The invention has for its object to provide an electronically controlled switching relay that enables a cost-effective and yet accurate setting of the desired preselectable values of the measured variables, with a clearly visible display of the set values and the instantaneous values of the measured variable should be provided with good accuracy .

Diese Aufgabe wird erfindungsgemäß durch die Merkmale des Anspruches 1 gelöst. Das elektronisch gesteuerte Schaltrelais ist mit einer Meßschaltung, einer Steuerschaltung, einer ein Potentiometer enthaltenden Vorrichtung zur Einstellung eines vorwählbaren Wertes der Meßgröße und einer eine Skala und einen Einstellzeiger aufweisenden Anzeigevorrichtung versehen. Darüber hinaus ist eine Ziffernanzeige vorgesehen, die den eingestellten Wert und/oder den Augenblickswert der Meßgröße anzeigt. Die Steuerschaltung wandelt das von dem Potentiometer abgegebene analoge Signal des vorwählbaren Wertes über einen A/D-Wandler in ein digitales Signal um, das die digitale Ziffernanzeige ansteuert, und vergleicht einen durch die Meßschaltung erfaßten Augenblickswert der Meßgröße mit dem voreingestellten Wert und gibt bei Gleichheit ein Signal ab. Die Anzeigevorrichtung weist eine Mehrzahl von nebeneinander angeordneten Strahlungsquellen auf, die von der Steuerschaltung abhängig von dem Augenblickswert der Meßgröße jeweils derart ansteuerbar sind, daß sie einen beweglichen analogen Zeiger bilden.This object is achieved by the features of claim 1. The electronically controlled switching relay is provided with a measuring circuit, a control circuit, a device containing a potentiometer for setting a preselectable value of the measured variable and a display device having a scale and a setting pointer. In addition, a numerical display is provided, which shows the set Displays the value and / or the instantaneous value of the measured variable. The control circuit converts the analog signal of the preselectable value, which is emitted by the potentiometer, into an digital signal via an A / D converter, which controls the digital numerical display, and compares an instantaneous value of the measured variable detected by the measuring circuit with the preset value, and gives equality a signal. The display device has a plurality of radiation sources arranged next to one another, each of which can be controlled by the control circuit depending on the instantaneous value of the measured variable in such a way that they form a movable analog pointer.

Durch diese erfindungsgemäße Anordnung können die Vorteile eines digitalen Schaltrelais, die in der genauen Vorgabe des voreinstellbaren Wertes bzw. des Augenblickswertes der Meßgröße und guter Reproduzierbarkeit bestehen, mit den Vorteilen eines analogen Schaltrelais der kostengünstigen und schnellen Voreinstellung des vorwählbaren Wertes der Meßgröße ohne die Notwendigkeit einer Speicherung (z.B. Kodierschalter bzw. elektrischer Speicher) des voreingestellten Wertes der Meßgröße und einer besseren Erkennbarkeit des Augenblickswertes kombiniert werden. Darüber hinaus kann, wenn gewünscht, eine gefühlsmäßige und schnelle Einstellung bzw. Verstellung des vorwählbaren Wertes der Meßgröße vorgenommen werden. Die den beweglichen Zeiger simulierenden Strahlungsquellen sind leicht und übersichtlich ablesbar, so daß bei kontinuierlich steigenden oder fallenden Werten der Meßgröße auch mit nur einem kurzen Blick feststellbar ist, wie der Stand ist.With this arrangement according to the invention, the advantages of a digital switching relay, which consist in the precise specification of the presettable value or the instantaneous value of the measured variable and good reproducibility, can be combined with the advantages of an analog switching relay in the inexpensive and rapid presetting of the preselectable value of the measured variable without the need for a Storage (eg coding switch or electrical memory) of the preset value of the measured variable and better visibility of the instantaneous value can be combined. In addition, if desired, an emotional and quick adjustment or adjustment of the preselectable value of the measured variable can be carried out. The radiation sources simulating the movable pointer are easy and clear to read, so that with continuously increasing or decreasing values of the measured variable it is possible to determine with just a short glance how the status is.

Vorzugsweise ist die Steuerschaltung als Mikroprozessor bzw. -computer ausgebildet, wobei der Mikroprozessor bzw. -computer und das Potentiomter zur Einstellung des vorwählbaren Wertes an einer gemeinsamen konstanten Spannung liegen. Dadurch können Spannungsschwankungen keinen Einfluß auf die Einstellung des vorwählbaren Wertes der Meßgröße ausüben.The control circuit is preferably designed as a microprocessor or computer, the microprocessor or computer and the potentiometer for setting the preselectable value are at a common constant voltage. As a result, voltage fluctuations can have no influence on the setting of the preselectable value of the measured variable.

Dadurch, daß z.B. anstelle eines Kodierschalters für die Einstellung des vorwählbaren Wertes der Meßgröße ein Potentiometer verwendet wird, können die Kosten für die Herstellung des elektronisch gesteuerten Schaltrelais verringert werden, wobei durch die Anzeige des durch das Potentiometer eingestellten vorwählbaren Wertes auf der Ziffernanzeige kostengünstige Potentiometer eingesetzt werden können, denn eine genaue Zuordnung der Meßgrößenskala zu den eingestellten Spannungswerten ist nicht nötig.Because e.g. Instead of a coding switch for setting the preselectable value of the measured variable, a potentiometer can be used, the costs for the manufacture of the electronically controlled switching relay can be reduced, whereby inexpensive potentiometers can be used by displaying the preselectable value set by the potentiometer on the numerical display, because an exact assignment of the measurement scale to the set voltage values is not necessary.

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und wird in der nachfolgenden Beschreibung näher erläutert. Es zeigen:

Fig. 1
eine schematische perspektivische Ansicht auf ein als Zeitrelais ausgebildetes Schaltrelais gemäß der Erfindung und
Fig. 2
ein Prinzipschaltung des Zeitrelais nach Fig. 1.
An embodiment of the invention is shown in the drawing and is explained in more detail in the following description. Show it:
Fig. 1
is a schematic perspective view of a switching relay designed as a timing relay according to the invention and
Fig. 2
a basic circuit of the timing relay according to FIG. 1.

Das erfindungsgemäße elektronisch gesteuerte Schaltrelais soll am Beispiel eines Zeitrelais beschrieben werden.The electronically controlled switching relay according to the invention will be described using the example of a timing relay.

Das elektronische Zeitrelais nach Fig. 1 ist mit einer Anzeigevorrichtung 1 versehen, die eine Zeitskaleneinteilung 2 aufweist. Zur Einstellung der Vorwählzeit ist ein großer durchsichtiger Einstellknopf 3 vorgesehen, der mit der Achse 4 eines Potontiometers verbunden ist. An der Achse 4 bzw. an dem Einstellknopf 3 ist ein Vorwählzeiger 5 befestigt, der die vorgewählte und eingestellte Zeit anzeigt. Die Skaleneinteilungen 2 werden von Leuchtdioden 6 gebildet, wobei mehrere Leuchtdioden 6 nebeneinander zur Darstellung eines Strichs oder eines Balkens angeordnet sind und wobei die Leuchtdioden von Hause aus strich- oder balkenförmig ausgebildet sind. Die die Skaleneinteilung bildenden Leuchtdioden 6 werden abhängig von der ablaufenden Zeit nacheinander angesteuert, so daß sie einen Ablaufzeiger simulieren. Selbstverständlich können zwischen den in Fig. 1 dargestellten Skaleneinteilungen weitere Leuchtdioden 6 vorgesehen sein, wodurch die Darstellung des Ablaufzeigers verbessert wird. Weiterhin ist eine digitale Ziffernanzeige 8 vorgesehen, über die sowohl die eingestellte gewünschte Zeit (Vorwählzeit) als auch die nach dem Start des Zeitrelais ablaufende Zeit angezeigt werden kann. Um unterschiedliche Zeitbereiche bzw. Zehnerpotenzen für die Bereichseinstellung Stunden, Minuten und Sekunden anzeigen zu können, sind Leuchtdioden 9 vorgesehen. Der Einstellknopf 3 ist so groß ausgebildet, daß alle Elemente unter dem Knopf 3 liegen, wobei er gegen die Stirnwand des Relais abgedichtet ist.1 is provided with a display device 1, which has a time scale division 2. To set the preselection time, a large transparent setting button 3 is provided, which is connected to the axis 4 of a potentiometer. On the axis 4 or on the adjusting button 3, a preselection pointer 5 is attached, which indicates the preselected and set time. The scale divisions 2 are formed by light-emitting diodes 6, a plurality of light-emitting diodes 6 being arranged next to one another to represent a line or a bar, and the light-emitting diodes are designed in the form of lines or bars. The light-emitting diodes 6 forming the scale division are driven one after the other depending on the elapsing time, so that they simulate a sequence pointer. Of course, further light-emitting diodes 6 can be provided between the scale divisions shown in FIG. 1, which improves the representation of the flow pointer. Furthermore, a digital numerical display 8 is provided, via which both the set desired time (preselection time) and the time running after the start of the time relay are displayed can be. In order to be able to display different time ranges or powers of ten for the range setting hours, minutes and seconds, light-emitting diodes 9 are provided. The adjustment button 3 is so large that all elements are under the button 3, wherein it is sealed against the end wall of the relay.

In dem in der Fig. 2 dargestellten Prinzipschaltbild ist ein Mikrocomputer bzw. -prozessor 7 dargestellt, der an einer festen Versorgungsspannung Vcc-GND liegt. Das Einstellpotentiometer R1 für die Vorwählzeit liegt ebenfalls mit seinen zwei Anschlüssen an der festen Spannung, wobei der Abgriff des Potentiometers an einem Eingang des Mikrocomputers 7 liegt und mit dem mikrocomputerinternen A/D-Wandler verbunden ist. Das Potentiometer R1 dient zur Einstellung der Vorwählzeit, nach deren Ablauf ein bestimmtes Ereignis eintreten soll. An dem mit dem Potentiometer R1 verbundenen Eingang des Mikrocomputers 7 liegt somit ein analoges Stromsignal an, das ein Maß für die Vorwählzeit ist.The basic circuit diagram shown in FIG. 2 shows a microcomputer or processor 7 which is connected to a fixed supply voltage Vcc-GND. The setting potentiometer R1 for the preselection time is likewise connected to the fixed voltage with its two connections, the tap of the potentiometer being located at an input of the microcomputer 7 and being connected to the microcomputer-internal A / D converter. The potentiometer R1 is used to set the preselection time after which a certain event should occur. An analog current signal, which is a measure of the preselection time, is thus present at the input of the microcomputer 7 connected to the potentiometer R1.

Der Mikrocomputer 7 weist weiterhin einen Taktgeber bzw. eine Zeitschaltung auf, der bzw. die die ablaufende Zeit vorgibt. Der Mikroprozessor 7 ist mit den Leuchtdioden 6, von denen nur einige dargestellt sind, und mit der digitalen Ziffernanzeige 8 verbunden, wobei im Falle, daß der Mikrocomputer 1 serielle Signale liefert, ein Treiber vorgesehen ist, der die seriellen Signale in BCD-Signale umwandelt.The microcomputer 7 also has a clock generator or a time circuit which specifies the elapsing time. The microprocessor 7 is connected to the light-emitting diodes 6, only a few of which are shown, and to the digital numerical display 8, and in the event that the microcomputer 1 supplies serial signals, a driver is provided which converts the serial signals into BCD signals .

Die Wirkungsweise der dargestellten Schaltung ist wie folgt. An dem Potentiometer R1 wird die gewünschte Zeit eingestellt, wobei der Mikrocomputer seinen Eingang bzw. seine Eingänge abfragt. Diese Abfrage kann beispielsweise taktweise erfolgen. Mit der Einstellung des Potentiometers R1 wird auf der Anzeigevorrichtung 1 über den Vorwählzeiger 5 die eingestellte Zeit dargestellt. Das von dem Potentiometer R1 gelieferte Signal wird in dem A/D-Wandler des Mikrocomputers 1 in digitale Signale umgewandelt und die an den Ausgängen des Mikrocomputers 7 anstehenden Digitalsignale steuern direkt oder über den Treiber die Ziffernanzeigevorrichtung 8 an, an der die eingestellte vorgewählte Zeit digital angezeigt wird. Die Einstellung der Vorwählzeit kann somit sehr genau vorgenommen werden, da der am Potentiometer R1 abgetastete Spannungs- bzw. Stromwert direkt auf der Anzeige 8 abgelesen werden kann. Nach dem Starten des Zeitrelais vergleicht der Mikrocomputer die durch den Taktgeber bestimmte ablaufende bzw. verbleibende Zeit mit vorgegebenen Zeitwerten und steuert abhängig von diesem Ergebnis die Leuchtdioden 6 entsprechend der Skaleneinteilung an. Gleichzeitig kann die ablaufende bzw. verbleibende Zeit auf der Anzeigevorrichtung 8 dargestellt werden. Weiterhin wird die ablaufende Zeit von dem Mikrocomputer 1 mit der Vorwählzeit verglichen und bei Gleichheit wird ein Signal an seinem Ausgang abgegeben, das bestimmte Ereignisse auslöst.The operation of the circuit shown is as follows. The desired time is set on the potentiometer R1, the microcomputer taking its input or queries its inputs. This query can, for example, take place in cycles. With the setting of the potentiometer R1, the set time is shown on the display device 1 via the preselection pointer 5. The signal supplied by the potentiometer R1 is converted into digital signals in the A / D converter of the microcomputer 1 and the digital signals present at the outputs of the microcomputer 7 directly or via the driver control the numerical display device 8 at which the preset time set is digital is shown. The preselection time can thus be set very precisely since the voltage or current value sensed on the potentiometer R1 can be read directly on the display 8. After starting the time relay, the microcomputer compares the elapsed or remaining time determined by the clock generator with predetermined time values and, depending on this result, controls the light-emitting diodes 6 in accordance with the scale division. At the same time, the elapsing or remaining time can be shown on the display device 8. Furthermore, the elapsing time is compared by the microcomputer 1 with the preselection time and, in the case of equality, a signal is emitted at its output which triggers certain events.

Wenn während der ablaufenden Zeit von der Bedienperson festgestellt wird, daß die Vorwählzeit zu kurz oder zu lang ist, kann diese voreingstellte Zeit durch Drehen am Einstellknopf 3 bzw. am Potentiometer R1 verändert werden, da das Potentiometer R1 selbst als "Speicher" der Vorwählzeit verbunden ist. Ein weiteres Potentiometer R2 ist parallel zum Potentiometer R1 vorgesehen und kann beispielsweise zur Einstellung des Zeitbereichs bzw. der Zehnerpotenzen dienen, wobei vom Mikrocomputer 7 der jeweils eingestellte Zeitbereich bei der über das Potentiometer R1 eingestellten Vorwählzeit berücksichtigt wird. Abhängig von der Einstellung des Zeitbereichs werden die Leuchtdioden 9 angesteuert. Das Potentiometer R2 kann an der hinteren Stirnfläche des Zeitrelais vorgesehen sein, da üblicherweise die Zeitbereichseinstellung einmal vom Anwender vorgenommen wird.If the operator determines during the expiring time that the preselection time is too short or too long, this preset time can be changed by turning the adjusting knob 3 or the potentiometer R1, since the potentiometer R1 itself is connected as a "memory" of the preselection time is. A further potentiometer R2 is provided in parallel to the potentiometer R1 and can be used, for example, to set the time range or powers of ten, the one set by the microcomputer 7 in each case Time range in which the preselection time set via potentiometer R1 is taken into account. Depending on the setting of the time range, the LEDs 9 are activated. The potentiometer R2 can be provided on the rear face of the time relay, since the time range setting is usually made once by the user.

Vorzugsweise ist das Einstellelement des Potentiometers R2 für die Einstellung des Zeitbereichs besonders ausgebildet. Das Einstellelement ist ein Raststift, der mit einer Hülse mit Vertiefungen zusammenarbeitet, derart, daß der Raststift jeweils in eine Vertiefung einrastet, wodurch die Raststellungen vorgegeben sind. Je nach der Anzahl der einzustellenden Zeitbereiche sind entsprechend Raststellungen vorgesehen. Dadurch kann das analoge Potentiometer R2 "digital" eingestellt werden. Allerdings können auch andere Einstellelemente für die Zeitbereiche vorgesehen werden.The setting element of the potentiometer R2 is preferably specially designed for setting the time range. The adjusting element is a locking pin which cooperates with a sleeve with depressions, in such a way that the locking pin engages in each case in one depression, as a result of which the locking positions are predetermined. Depending on the number of time ranges to be set, corresponding locking positions are provided. This enables the analog potentiometer R2 to be set "digitally". However, other setting elements for the time ranges can also be provided.

In dem Ausführungsbeispiel ist die Steuerung und die Zeitschaltung durch einen Mikrocomputer realisiert, selbstverständlich kann auch ein Mikroprozessor mit einer entsprechenden externen Beschaltung vorgesehen werden oder es können getrennte diskrete Schaltkreise verschaltet werden.In the exemplary embodiment, the control and the time switching are implemented by a microcomputer; of course, a microprocessor with a corresponding external circuit can also be provided, or separate discrete circuits can be connected.

Das elektronisch gesteuerte Schaltrelais nach der Erfindung wurde anhand eines Zeitrelais beschrieben, d.h. die Meßgröße ist dabei die Zeit. In entsprechender Weise gilt die Erfindung für andere Arten von Schaltrelais, z.B. Meß- und Überwachungsrelais, wobei die Meßgröße beispielsweise eine Temperatur, eine Drehzahl, eine Spannung, ein Strom, eine Frequenz, ein Niveau, ein Winkel oder dergleichen sein kann.The electronically controlled switching relay according to the invention has been described with the aid of a time relay, ie the measured variable is time. The invention applies in a corresponding manner to other types of switching relays, for example measuring and monitoring relays, the measured variable being, for example, a temperature, a Speed, voltage, current, frequency, level, angle, or the like.

Claims (8)

  1. Electronically controlled switch relay with a display unit (1) containing a digital display (8), a measuring circuit for collecting a measurable variable, a control circuit (7), a device for setting a preselectable value of the measurable variable on the digital display (8), which displays the preselectable value of the measurable variable and optionally the instantaneous value of the measurable variable collected by the measuring circuit, wherein the control circuit (7) compares the instantaneous value of the measurable variable with the preselectable value and emits a signal on equality, and the device for setting the preselectable value of the measurable variable has a potentiometer (R1) and a setting indicator (5) cooperating with the pickoff of the potentiometer (R1) and with a dial, wherein the control circuit (7) converts the analog setting signal emitted by the potentiometer (R1) for the preselectable value of the measurable variable via an A-D converter into a digital signal, which actuates the digital display (8), and wherein the display unit has a plurality of radiation sources (6), which cooperate with the dial and may be actuated by the control circuit (7) dependent on the collected measurable variable in such a way that they simulate a movable analog indicator in accordance with the instantaneous value of the measurable variable.
  2. Electronically controlled switch relay according to Claim 1, characterised in that the control circuit (7) is constructed as a microcomputer or microprocessor which also forms at least part of the measuring circuit, and that the microcomputer/microprocessor (7) and the potentiometer (R1) are on a joint constant voltage, the pickoff of the potentiometer (R1) being connected with an A-D converter preferably contained in the microcomputer/microprocessor.
  3. Electronically controlled switch relay according to Claim 1 or 2, characterised in that a further potentiometer (R2) is provided to set various measurement or display ranges.
  4. Electronically controlled switch relay according to one of Claims 1 to 3, characterised in that the radiation sources (6) forming the movable indicator for the instantaneous value of the measurable variable form a stroke- or bar-shaped display.
  5. Electronically controlled switch relay according to one of Claims 1 to 4, characterised in that the radiation sources (6) forming the movable indicator at the same time form the dial graduation (2) of the display unit (1).
  6. Electronically controlled switch relay according to one of Claims 1 to 5, characterised in that the radiation sources (6) are constructed as light-emitting diodes.
  7. Electronically controlled switch relay according to one of Claims 1 to 6, characterised in that further light-emitting diodes (9) are provided to display the measurement or display ranges.
  8. Electronically controlled switch relay according to one of Claims 1 to 7, characterised in that the potentiometer (R1) for setting the preselectable value or the measurable variable has a transparent adjusting button (3) which covers the display unit (1) and seals it against the front wall.
EP92250261A 1991-10-24 1992-09-18 Electronically controlled switching relay Expired - Lifetime EP0538968B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4135455 1991-10-24
DE4135455A DE4135455C1 (en) 1991-10-24 1991-10-24

Publications (2)

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EP0538968A1 EP0538968A1 (en) 1993-04-28
EP0538968B1 true EP0538968B1 (en) 1996-04-10

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Application Number Title Priority Date Filing Date
EP92250261A Expired - Lifetime EP0538968B1 (en) 1991-10-24 1992-09-18 Electronically controlled switching relay

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EP (1) EP0538968B1 (en)
AT (1) ATE136664T1 (en)
DE (2) DE4135455C1 (en)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2652866A1 (en) * 1976-11-20 1978-05-24 Agfa Gevaert Ag Electronic watch with analogue display - uses radial semiconductor display elements arranged on one or more carrier discs
US4222226A (en) * 1978-02-14 1980-09-16 Fuji Electric Co., Ltd. Multi-range timer
JPS55164395A (en) * 1979-06-11 1980-12-22 Seikosha Co Ltd Timer
GB2148571A (en) * 1983-09-28 1985-05-30 Carville Limited Meter for providing L.C.D. display of measured quantities
JPS60249422A (en) * 1984-05-24 1985-12-10 Fuji Electric Co Ltd Timing generator
DE58909814D1 (en) * 1989-10-31 1997-09-18 Saia Burgess Electronics Ag Timing relay

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DE4135455C1 (en) 1993-04-08
DE59205954D1 (en) 1996-05-15
ATE136664T1 (en) 1996-04-15
EP0538968A1 (en) 1993-04-28

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