ES8305935A1 - Threshold circuit without hysteresis - Google Patents

Threshold circuit without hysteresis

Info

Publication number
ES8305935A1
ES8305935A1 ES515405A ES515405A ES8305935A1 ES 8305935 A1 ES8305935 A1 ES 8305935A1 ES 515405 A ES515405 A ES 515405A ES 515405 A ES515405 A ES 515405A ES 8305935 A1 ES8305935 A1 ES 8305935A1
Authority
ES
Spain
Prior art keywords
voltage
circuit
evaluated
frequency
instantaneous frequency
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
Application number
ES515405A
Other languages
Spanish (es)
Other versions
ES515405A0 (en
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.)
Nokia Spain SA
Original Assignee
Alcatel Espana SA
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 Alcatel Espana SA filed Critical Alcatel Espana SA
Publication of ES8305935A1 publication Critical patent/ES8305935A1/en
Publication of ES515405A0 publication Critical patent/ES515405A0/en
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
    • G01R19/16566—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533
    • G01R19/16576—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533 comparing DC or AC voltage with one threshold
    • G01R19/1658—AC voltage or recurrent signals
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
    • B61L1/00—Devices along the route controlled by interaction with the vehicle or train
    • B61L1/18—Railway track circuits
    • B61L1/181—Details
    • B61L1/187—Use of alternating current
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R23/00—Arrangements for measuring frequencies; Arrangements for analysing frequency spectra
    • G01R23/02—Arrangements for measuring frequency, e.g. pulse repetition rate; Arrangements for measuring period of current or voltage
    • G01R23/15—Indicating that frequency of pulses is either above or below a predetermined value or within or outside a predetermined range of values, by making use of non-linear or digital elements (indicating that pulse width is above or below a certain limit)

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Power Engineering (AREA)
  • Nonlinear Science (AREA)
  • Automation & Control Theory (AREA)
  • Mechanical Engineering (AREA)
  • Train Traffic Observation, Control, And Security (AREA)
  • Locating Faults (AREA)
  • Manipulation Of Pulses (AREA)

Abstract

This threshold circuit has two active operating states and one passive failure state. It can be used for determining the position of an alternating voltage to be evaluated, for example a track voltage in a track circuit, with respect to a reference voltage, any disturbances (for example due to component failure) being indicated by the passive state which can be distinguished from the two operating states. The invention makes use of the finding that the instantaneous frequency of an aggregate voltage produced from the addition of two voltages of different frequencies is a function of the amplitude ratio of the added voltages. Accordingly, the threshold circuit according to the invention consists of an adding circuit (AD) in which a reference voltage (U2) with a frequency (f2) which is different from the frequency (f1) of the voltage (U1) to be evaluated is added to the voltage to be evaluated and of an evaluating circuit (AWS) for detecting the instantaneous frequency (f1) of the aggregate voltage (U1) and for comparing this instantaneous frequency with a nominal value. Various variants of the evaluating circuit are the subject-matter of the subclaims.
ES515405A 1981-09-05 1982-08-31 A THRESHOLD FREE THRESHOLD CIRCUIT. Granted ES515405A0 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19813135232 DE3135232C2 (en) 1981-09-05 1981-09-05 Hysteresis-free threshold switching

Publications (2)

Publication Number Publication Date
ES8305935A1 true ES8305935A1 (en) 1983-05-01
ES515405A0 ES515405A0 (en) 1983-05-01

Family

ID=6140969

Family Applications (1)

Application Number Title Priority Date Filing Date
ES515405A Granted ES515405A0 (en) 1981-09-05 1982-08-31 A THRESHOLD FREE THRESHOLD CIRCUIT.

Country Status (2)

Country Link
DE (1) DE3135232C2 (en)
ES (1) ES515405A0 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3705061C1 (en) * 1987-02-18 1988-08-18 Ivv Ingenieurgesellschaft Fuer Signalling circuit arrangement for comparing two alternating voltages
EP2100793B1 (en) * 2008-03-13 2012-08-29 Siemens Schweiz AG Method and device for continuous evaluation of receipt signals in railway electricity circuits
DE102018212876A1 (en) * 2018-08-02 2020-02-06 KSB SE & Co. KGaA Control method for machine with converter-driven electric drive
CN110588714B (en) * 2019-09-29 2020-11-27 同济大学 Method and device for judging interference of axle counting magnetic head by traction current and isolation method

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2623967C3 (en) * 1976-05-28 1979-09-20 Standard Elektrik Lorenz Ag, 7000 Stuttgart Phase-synchronously controlled track circuit receiver

Also Published As

Publication number Publication date
ES515405A0 (en) 1983-05-01
DE3135232C2 (en) 1985-06-27
DE3135232A1 (en) 1983-04-07

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