EP0538968A1 - Relais de commutation à commande électronique - Google Patents

Relais de commutation à commande électronique Download PDF

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Publication number
EP0538968A1
EP0538968A1 EP92250261A EP92250261A EP0538968A1 EP 0538968 A1 EP0538968 A1 EP 0538968A1 EP 92250261 A EP92250261 A EP 92250261A EP 92250261 A EP92250261 A EP 92250261A EP 0538968 A1 EP0538968 A1 EP 0538968A1
Authority
EP
European Patent Office
Prior art keywords
measured variable
potentiometer
electronically controlled
switching relay
controlled switching
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.)
Granted
Application number
EP92250261A
Other languages
German (de)
English (en)
Other versions
EP0538968B1 (fr
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/fr
Application granted granted Critical
Publication of EP0538968B1 publication Critical patent/EP0538968B1/fr
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 time relay can be designed as a multi-function device or as a mono-function device, for example a multi-function device can operate as a delayed or delayed relay, as a switch-on wiper or clock generator.
  • an electronic time relay according to the prior art has different time ranges and different adjustable end times.
  • To set the time ranges the times and the functions, coding switches are provided, which are operated using rotary knobs or other setting elements can be set.
  • a scale is provided on which the desired time can be selected by means of a rotatable pointer.
  • a potentiometer is used as the setting element, which is inexpensive but has linearity and angle of rotation errors that have to be compensated for.
  • 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 time relay.
  • the elapsing time is indicated by a digital numerical display, the time being counted down from the time preset with the coding switch in accordance with a counter until it reaches zero, a signal being emitted.
  • the invention has for its object to provide an electronically controlled switching relay, which enables a cost-effective and yet accurate setting of the desired preselectable values of the measured variables, with a clearly visible display of the instantaneous values of the measured variable with good accuracy.
  • the electronically controlled switching relay has a measuring circuit, a control circuit, a device containing a potentiometer for setting a preselectable value of the measured variable and a display device provided with a scale and a pointer.
  • the control circuit converts the analog signal of the preselectable value emitted by the potentiometer into a digital signal via an A / D converter and compares an instantaneous value of the measured variable detected by the measuring circuit with the preset value and emits a signal if it is the same.
  • the display device has a plurality of radiation sources which are controlled by the control circuit depending on the instantaneous value of the measured variable such that they simulate a movable pointer.
  • the advantages of a digital switching relay which consist in the precise specification of the instantaneous value of the measured variable, with the advantages of an analog switching relay, the inexpensive and rapid presetting of the preselectable value of the measured variable without the need for storage (e.g. coding switches or electrical memory ) of the preset value of the measured variable and better visibility of the instantaneous value can be combined.
  • 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 with just a quick glance you can see how the stand is.
  • the control circuit is preferably designed as a microprocessor or computer, the microprocessor or computer and the potentiometer for setting the preselectable value being connected to a common fixed voltage. As a result, voltage fluctuations have no influence on the setting of the preselectable value of the measured variable.
  • a digital numerical display device is provided which at the same time indicates this when the preselectable value of the measured variable is set. This ensures good reproducibility and good accuracy of the setting. After the setting has been made, this display device can digitally display the instantaneous value of the measured variable.
  • a potentiometer can be used, the costs for the production 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.
  • the electronic time relay according to FIG. 1 is provided with 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 to the axis 4 or to the adjusting knob 3, 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 having 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 off 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 event 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.
  • Another 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 microcomputer 7 setting the one 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 end 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 that works together with a sleeve with depressions, such that the locking pin engages in each case in a recess, whereby 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 can also be provided with a corresponding external circuit 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 Relais de commutation à commande électronique Expired - Lifetime EP0538968B1 (fr)

Applications Claiming Priority (2)

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

Publications (2)

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

Family

ID=6443550

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92250261A Expired - Lifetime EP0538968B1 (fr) 1991-10-24 1992-09-18 Relais de commutation à commande électronique

Country Status (3)

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

Citations (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
GB2052111A (en) * 1979-06-11 1981-01-21 Seikosha Kk Electronic timer
GB2148571A (en) * 1983-09-28 1985-05-30 Carville Limited Meter for providing L.C.D. display of measured quantities
GB2159646A (en) * 1984-05-24 1985-12-04 Fuji Electric Co Ltd Time-interval generating apparatus
EP0425749A1 (fr) * 1989-10-31 1991-05-08 Saia Ag Relais temporisé

Patent Citations (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
GB2052111A (en) * 1979-06-11 1981-01-21 Seikosha Kk Electronic timer
GB2148571A (en) * 1983-09-28 1985-05-30 Carville Limited Meter for providing L.C.D. display of measured quantities
GB2159646A (en) * 1984-05-24 1985-12-04 Fuji Electric Co Ltd Time-interval generating apparatus
EP0425749A1 (fr) * 1989-10-31 1991-05-08 Saia Ag Relais temporisé

Also Published As

Publication number Publication date
EP0538968B1 (fr) 1996-04-10
DE4135455C1 (fr) 1993-04-08
DE59205954D1 (de) 1996-05-15
ATE136664T1 (de) 1996-04-15

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