EP0538968B1 - Elektronisch gesteuertes Schaltrelais - Google Patents

Elektronisch gesteuertes Schaltrelais 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
Authority
EP
European Patent Office
Prior art keywords
potentiometer
electronically controlled
value
measurable variable
setting
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP92250261A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0538968A1 (de
Inventor
Karl D. Friedrich
Gerd.-L. Metzner
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Schleicher GmbH and Co Relais Werke KG
Original Assignee
Schleicher GmbH and Co Relais Werke KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Schleicher GmbH and Co Relais Werke KG filed Critical Schleicher GmbH and Co Relais Werke KG
Publication of EP0538968A1 publication Critical patent/EP0538968A1/de
Application granted granted Critical
Publication of EP0538968B1 publication Critical patent/EP0538968B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04G—ELECTRONIC TIME-PIECES
    • G04G15/00—Time-pieces comprising means to be operated at preselected times or after preselected time intervals
    • G04G15/006—Time-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.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Relay Circuits (AREA)
  • Measurement Of Current Or Voltage (AREA)
  • Measurement Of Predetermined Time Intervals (AREA)
  • Radio Relay Systems (AREA)
EP92250261A 1991-10-24 1992-09-18 Elektronisch gesteuertes Schaltrelais Expired - Lifetime EP0538968B1 (de)

Applications Claiming Priority (2)

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

Publications (2)

Publication Number Publication Date
EP0538968A1 EP0538968A1 (de) 1993-04-28
EP0538968B1 true EP0538968B1 (de) 1996-04-10

Family

ID=6443550

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92250261A Expired - Lifetime EP0538968B1 (de) 1991-10-24 1992-09-18 Elektronisch gesteuertes Schaltrelais

Country Status (3)

Country Link
EP (1) EP0538968B1 (enrdf_load_stackoverflow)
AT (1) ATE136664T1 (enrdf_load_stackoverflow)
DE (2) DE4135455C1 (enrdf_load_stackoverflow)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2652866A1 (de) * 1976-11-20 1978-05-24 Agfa Gevaert Ag Uhr mit steuerbaren halbleiteranzeigeelementen
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 (ja) * 1984-05-24 1985-12-10 Fuji Electric Co Ltd 時限発生装置
EP0425749B1 (de) * 1989-10-31 1997-08-13 SAIA-Burgess Electronics AG Zeitrelais

Also Published As

Publication number Publication date
EP0538968A1 (de) 1993-04-28
DE59205954D1 (de) 1996-05-15
DE4135455C1 (enrdf_load_stackoverflow) 1993-04-08
ATE136664T1 (de) 1996-04-15

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