GB1460747A - Digital data recorder - Google Patents

Digital data recorder

Info

Publication number
GB1460747A
GB1460747A GB5999673A GB5999673A GB1460747A GB 1460747 A GB1460747 A GB 1460747A GB 5999673 A GB5999673 A GB 5999673A GB 5999673 A GB5999673 A GB 5999673A GB 1460747 A GB1460747 A GB 1460747A
Authority
GB
United Kingdom
Prior art keywords
counter
stage
stable
inductor
reactance
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
GB5999673A
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.)
CBS Corp
Original Assignee
Westinghouse Electric Corp
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 Westinghouse Electric Corp filed Critical Westinghouse Electric Corp
Publication of GB1460747A publication Critical patent/GB1460747A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21C—NUCLEAR REACTORS
    • G21C17/00—Monitoring; Testing ; Maintaining
    • G21C17/10—Structural combination of fuel element, control rod, reactor core, or moderator structure with sensitive instruments, e.g. for measuring radioactivity, strain
    • G21C17/12—Sensitive element forming part of control element
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K21/00—Details of pulse counters or frequency dividers
    • H03K21/40—Monitoring; Error detection; Preventing or correcting improper counter operation
    • H03K21/403—Arrangements for storing the counting state in case of power supply interruption
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K23/00—Pulse counters comprising counting chains; Frequency dividers comprising counting chains
    • H03K23/40—Gating or clocking signals applied to all stages, i.e. synchronous counters
    • H03K23/50—Gating or clocking signals applied to all stages, i.e. synchronous counters using bi-stable regenerative trigger circuits
    • H03K23/56—Reversible counters
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E30/00—Energy generation of nuclear origin
    • Y02E30/30—Nuclear fission reactors

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • General Engineering & Computer Science (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Control Of Electrical Variables (AREA)
  • Measurement Of Resistance Or Impedance (AREA)
  • Monitoring And Testing Of Nuclear Reactors (AREA)
  • Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)

Abstract

1460747 Electronic counters restoring after power failure WESTINGHOUSE ELECTRIC CORP 28 Dec 1973 [8 Jan 1973] 59996/73 Heading G4A [Also in Division H3] Each bi-stable stage of a counter (Figs. 1, 4, 5, not shown) includes an inductor L wound on a core whose magnetisation is dependent on the state of the stage prior to a power failure and which voices the reactance of the inductor L to charge a time constant of the stage and thus cause it to be reset to the same state on restoration of the power supply. The bi-stable stage is a master-slave bi-stable circuit using cross coupled NAND-gates 42, 44 and 34, 38. The inductor L is included in the feedback path of the master bi-stable. On restoration of supply the voltage across resistor R L increases either more quickly or more slowly than that across a capacitor C depending on the remanent magnetism in the core and therefore the reactance of L and thus causes the stage to settle into its original state. The specification describes a three stage reversible BCD counter using the stages and intended to be used to provide driving pulses for a magnetic mechanism controlling the position of the rods in a nuclear reactor. The inputs of the counter have delay circuits to prevent multiple counts when the counter is supplied by relay contacts subject to bounce. The counter is prevented from counting down below zero, to prevent false readings. A circuit (Fig. 9) is provided to ensure that the supply voltage is restored to the counter substantially instantaneously after it has built up following a failure.
GB5999673A 1973-01-08 1973-12-28 Digital data recorder Expired GB1460747A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US321910A US3860914A (en) 1973-01-08 1973-01-08 Digital data recorder

Publications (1)

Publication Number Publication Date
GB1460747A true GB1460747A (en) 1977-01-06

Family

ID=23252577

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5999673A Expired GB1460747A (en) 1973-01-08 1973-12-28 Digital data recorder

Country Status (6)

Country Link
US (1) US3860914A (en)
BE (1) BE809486A (en)
CA (1) CA984471A (en)
DE (1) DE2400112A1 (en)
ES (1) ES199301Y (en)
GB (1) GB1460747A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2176959A (en) * 1985-06-18 1987-01-07 Motorola Inc Cmos power-on detection

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3969703A (en) * 1973-10-19 1976-07-13 Ball Corporation Programmable automatic controller
US4084232A (en) * 1977-02-24 1978-04-11 Honeywell Information Systems Inc. Power confidence system
US4228502A (en) * 1977-06-29 1980-10-14 Hitachi, Ltd. Electronic computer system
JPS613158Y2 (en) * 1979-04-20 1986-01-31
JPH10150479A (en) * 1996-11-19 1998-06-02 Fujitsu Ltd Malfunction preventing device in failure of duplex device
CN107833643B (en) * 2017-10-16 2019-05-24 中核核电运行管理有限公司 Totally digitilized rod position measuring device and its method
CN113643834B (en) * 2021-08-11 2022-10-04 华能山东石岛湾核电有限公司 Configuration implementation system and implementation method for fuel ball lifting time of high-temperature gas cooled reactor

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3003141A (en) * 1959-02-18 1961-10-03 Ibm Ring circuits
US3154671A (en) * 1962-03-22 1964-10-27 Honeywell Inc Electrical counting apparatus including saturable magnetic cores
US3214606A (en) * 1962-08-13 1965-10-26 Gen Motors Corp Retentive memory bistable multivibrator circuit with preferred starting means
US3408505A (en) * 1963-12-18 1968-10-29 C & K Components Inc Electronic timing via magnetic core shift circuitry
DE1218511B (en) * 1964-11-14 1966-06-08 Philips Patentverwaltung Reversible magnetic core ring counter

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2176959A (en) * 1985-06-18 1987-01-07 Motorola Inc Cmos power-on detection
GB2176959B (en) * 1985-06-18 1989-07-19 Motorola Inc Cmos power-on detection circuit

Also Published As

Publication number Publication date
BE809486A (en) 1974-07-08
ES199301Y (en) 1975-11-16
DE2400112A1 (en) 1974-08-01
CA984471A (en) 1976-02-24
ES199301U (en) 1975-08-01
US3860914A (en) 1975-01-14

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee