GB1456029A - Digital position indication system - Google Patents

Digital position indication system

Info

Publication number
GB1456029A
GB1456029A GB5994373A GB5994373A GB1456029A GB 1456029 A GB1456029 A GB 1456029A GB 5994373 A GB5994373 A GB 5994373A GB 5994373 A GB5994373 A GB 5994373A GB 1456029 A GB1456029 A GB 1456029A
Authority
GB
United Kingdom
Prior art keywords
signals
rod
coils
coil
encoder
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
GB5994373A
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
Priority claimed from US320775A external-priority patent/US3895223A/en
Priority claimed from US00320792A external-priority patent/US3858191A/en
Priority to CA175,887A priority Critical patent/CA992259A/en
Application filed by Westinghouse Electric Corp filed Critical Westinghouse Electric Corp
Publication of GB1456029A publication Critical patent/GB1456029A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
    • G01D5/25—Selecting one or more conductors or channels from a plurality of conductors or channels, e.g. by closing contacts
    • G01D5/252—Selecting one or more conductors or channels from a plurality of conductors or channels, e.g. by closing contacts a combination of conductors or channels
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
    • G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
    • G01D5/20—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature
    • G01D5/22—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature differentially influencing two coils
    • G01D5/2208—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature differentially influencing two coils by influencing the self-induction of the coils
    • 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
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M1/00—Analogue/digital conversion; Digital/analogue conversion
    • H03M1/12—Analogue/digital converters
    • H03M1/34—Analogue value compared with reference values
    • H03M1/36—Analogue value compared with reference values simultaneously only, i.e. parallel type
    • H03M1/361—Analogue value compared with reference values simultaneously only, i.e. parallel type having a separate comparator and reference value for each quantisation level, i.e. full flash converter type
    • 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

Abstract

1456029 Position encoding WESTING- HOUSE ELECTRIC CORP 28 Dec 1973 [3 Jan 1973 (2)] 59943/73 Heading H3H The position of a nuclear reactor control rod is sensed by two interleaved sets of sensor coils A, B, Fig. 3A, connected to respective encoders 18 which compare the currents through each pair of adjacent coils in the same set to find the location of the end of the drive rod, and convert this into binary gray code. Encoder, Figs. 4A, 4B.-Each sensor coil a to u is connected in series with a resistance 200- 240, the resistances of the end coils a, u being of different values to resistances 200-236 to compensate for end effects. Differential amplifiers 242 with transient-limiting diodes and filters 32 produce a controlling D.C. voltage on that one of capacitors 264-304 corresponding to the position of the end of the rod, and the inversion of the required gray code appears at the bases of transistors 318-326. When addressed from central control, the encoder transmits gray code bits α, #, γ, #, #. In the event of an open or short circuited sensor coil, resistor or diode, an excess voltage results at the common of the sensor coils which is detected by circuit 34 which disables NAND gates 330-338 so that all the output bits become logical 1 which the central logic circuitry will interpret as a fault indication and signal back to the encoder a low frequency pulse signal F to cause a red light-emitting diode 368 to flash. For a reactor having many control rods, each with sensor coils A, B, all the A coil signals and all the B coil signals are time-division multiplexed into respective A and B channels, transmission of the position signals and the addressing signals being via optical isolating links. The received signals are checked, Figs. 7A, 7B (not shown) for error indicating combinations and compared with each other to see if a difference error exists, and are converted to normal binary form. If no error exists, the A and B signals for each rod are combined and decoded to energize an appropriate light emitting diode to indicate the rod position to the full resolution of the system. If an error is detected in the A or B channel only the good channel is used, the resulting indication being to half the resolution of the system. The central logic may be triplicate and use majority voting.
GB5994373A 1973-01-03 1973-12-28 Digital position indication system Expired GB1456029A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CA175,887A CA992259A (en) 1973-12-28 1973-07-06 Fillers or pigments using calcium hydrosilicates

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US320775A US3895223A (en) 1973-01-03 1973-01-03 Circuit arrangement for enhancing the reliability of common bus outputs of plural redundant systems
US00320792A US3858191A (en) 1973-01-03 1973-01-03 Digital multiplexed position indication and transmission system

Publications (1)

Publication Number Publication Date
GB1456029A true GB1456029A (en) 1976-11-17

Family

ID=26982646

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5994373A Expired GB1456029A (en) 1973-01-03 1973-12-28 Digital position indication system

Country Status (6)

Country Link
JP (1) JPS6233638B2 (en)
CH (1) CH573160A5 (en)
DE (1) DE2364590A1 (en)
ES (1) ES421799A1 (en)
FR (1) FR2212532B1 (en)
GB (1) GB1456029A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021029926A3 (en) * 2019-05-10 2021-04-01 Westinghouse Electric Company Llc Digital rod position indication system and method
RU2815433C2 (en) * 2019-05-10 2024-03-14 Вестингхаус Электрик Компани Ллс Rod position digital indication system and method

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5126778A (en) * 1974-08-30 1976-03-05 Matsushita Electric Works Ltd HODENTOTENTOSOCHI
US4371496A (en) * 1980-06-18 1983-02-01 Westinghouse Electric Corp. Position indication system
FR2619904B1 (en) * 1987-08-28 1989-12-01 Merlin Gerin POSITION SENSOR WITHOUT MECHANICAL CONTACT
GB9208749D0 (en) * 1992-04-23 1992-06-10 Rolls Royce & Associates Ltd Signal generating apparatus and method
EP0595553B1 (en) * 1992-10-29 1996-12-27 Rolls-Royce And Associates Limited Improvements in and relating to position responsive apparatus
CN115223735A (en) * 2022-05-12 2022-10-21 中核核电运行管理有限公司 Rod position determination method and device for pressurized water reactor control rod and rod position measurement system

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1124712B (en) * 1957-02-26 1962-03-01 Westinghouse Electric Corp Device for displaying the position of a tubular member made of magnetizable material and movable in the longitudinal direction
GB1006691A (en) * 1960-11-21 1965-10-06 Scully Jones & Co Improvements relating to measuring apparatus
SE327287B (en) * 1967-02-20 1970-08-17 Kockums Mekaniska Verkstads Ab
DE1300305C2 (en) * 1967-09-15 1974-05-02 Spinner, Dr.-Ing. Georg, 8000 München ELECTRONIC PRECISION DEVICE FOR MEASURING AND MONITORING MECHANICAL SIZES

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021029926A3 (en) * 2019-05-10 2021-04-01 Westinghouse Electric Company Llc Digital rod position indication system and method
TWI791150B (en) * 2019-05-10 2023-02-01 美商西屋電器公司 Digital rod position indication system and method
RU2815433C2 (en) * 2019-05-10 2024-03-14 Вестингхаус Электрик Компани Ллс Rod position digital indication system and method

Also Published As

Publication number Publication date
FR2212532B1 (en) 1978-06-23
JPS4997196A (en) 1974-09-13
JPS6233638B2 (en) 1987-07-22
FR2212532A1 (en) 1974-07-26
ES421799A1 (en) 1976-08-01
DE2364590A1 (en) 1974-07-04
CH573160A5 (en) 1976-02-27

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Legal Events

Date Code Title Description
PS Patent sealed
PE20 Patent expired after termination of 20 years

Effective date: 19931227