GB1484323A - Arrangement for comparing a sensed value with a reference value - Google Patents

Arrangement for comparing a sensed value with a reference value

Info

Publication number
GB1484323A
GB1484323A GB4382774A GB4382774A GB1484323A GB 1484323 A GB1484323 A GB 1484323A GB 4382774 A GB4382774 A GB 4382774A GB 4382774 A GB4382774 A GB 4382774A GB 1484323 A GB1484323 A GB 1484323A
Authority
GB
United Kingdom
Prior art keywords
comparing
value
signals
sensed value
reference value
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
GB4382774A
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Publication of GB1484323A publication Critical patent/GB1484323A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K5/00—Manipulating of pulses not covered by one of the other main groups of this subclass
    • H03K5/22—Circuits having more than one input and one output for comparing pulses or pulse trains with each other according to input signal characteristics, e.g. slope, integral
    • H03K5/24—Circuits having more than one input and one output for comparing pulses or pulse trains with each other according to input signal characteristics, e.g. slope, integral the characteristic being amplitude
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • General Physics & Mathematics (AREA)
  • Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
  • Dc Digital Transmission (AREA)
  • Safety Devices In Control Systems (AREA)

Abstract

1484323 Redundant signal systems SIEMENS AG 9 Oct 1974 [9 Oct 1973] 43827/74 Heading H3P The validity of a comparison between a sensed value and a reference value is tested by having at least three independent signals representing the sensed value, comparing each with an independently produced reference value to produce at least three difference signals and comparing the difference signals in pairs to produce a fault signal. Sensed value signals produced by sources M1, M2, M3 are connected to differential amplifiers V1, V2, V3, reference signals set by potentiometers P1, P2, P3 being connected to the other inputs of the differential amplifiers. The difference signals from amplifiers V1, V2, V3 are compared in pairs in circuits VG1, VG2, VG3, and if a fault occurs the channel it is in can be deduced from which of circuits VG1, VG2 and VG3 give a non- zero output. When comparing the outputs of two units DV1, DV2, DV3 the earth potential of one is preferably added to the difference output of the other.
GB4382774A 1973-10-09 1974-10-09 Arrangement for comparing a sensed value with a reference value Expired GB1484323A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19732350652 DE2350652C2 (en) 1973-10-09 1973-10-09 Limit monitor for nvm systems

Publications (1)

Publication Number Publication Date
GB1484323A true GB1484323A (en) 1977-09-01

Family

ID=5894918

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4382774A Expired GB1484323A (en) 1973-10-09 1974-10-09 Arrangement for comparing a sensed value with a reference value

Country Status (5)

Country Link
AT (1) AT345699B (en)
CH (1) CH584413A5 (en)
DE (1) DE2350652C2 (en)
FR (1) FR2246875B3 (en)
GB (1) GB1484323A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH617014A5 (en) * 1977-03-04 1980-04-30 Bbc Brown Boveri & Cie

Also Published As

Publication number Publication date
DE2350652C2 (en) 1975-08-07
DE2350652B1 (en) 1975-01-02
AT345699B (en) 1978-09-25
FR2246875A1 (en) 1975-05-02
FR2246875B3 (en) 1977-07-08
CH584413A5 (en) 1977-01-31
ATA782874A (en) 1978-01-15

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee