FR2369569A1 - Systeme de mesure a convertisseur analogique-numerique - Google Patents
Systeme de mesure a convertisseur analogique-numeriqueInfo
- Publication number
- FR2369569A1 FR2369569A1 FR7732409A FR7732409A FR2369569A1 FR 2369569 A1 FR2369569 A1 FR 2369569A1 FR 7732409 A FR7732409 A FR 7732409A FR 7732409 A FR7732409 A FR 7732409A FR 2369569 A1 FR2369569 A1 FR 2369569A1
- Authority
- FR
- France
- Prior art keywords
- converter
- measuring instrument
- logarithmic
- input
- input signals
- 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.)
- Withdrawn
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
- G01R19/16528—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values using digital techniques or performing arithmetic operations
-
- 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
- G01D3/00—Indicating or recording apparatus with provision for the special purposes referred to in the subgroups
- G01D3/02—Indicating or recording apparatus with provision for the special purposes referred to in the subgroups with provision for altering or correcting the law of variation
- G01D3/022—Indicating or recording apparatus with provision for the special purposes referred to in the subgroups with provision for altering or correcting the law of variation having an ideal characteristic, map or correction data stored in a digital memory
-
- 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
- G01D3/00—Indicating or recording apparatus with provision for the special purposes referred to in the subgroups
- G01D3/02—Indicating or recording apparatus with provision for the special purposes referred to in the subgroups with provision for altering or correcting the law of variation
- G01D3/024—Indicating or recording apparatus with provision for the special purposes referred to in the subgroups with provision for altering or correcting the law of variation for range change; Arrangements for substituting one sensing member by another
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
- G01R15/005—Circuits for altering the indicating characteristic, e.g. making it non-linear
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
- G01R15/08—Circuits for altering the measuring range
- G01R15/09—Autoranging circuits
-
- 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
- G01R19/25—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques
- G01R19/255—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques using analogue/digital converters of the type with counting of pulses during a period of time proportional to voltage or current, delivered by a pulse generator with fixed frequency
-
- 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
-
- 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
- H03M1/50—Analogue/digital converters with intermediate conversion to time interval
- H03M1/56—Input signal compared with linear ramp
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Technology Law (AREA)
- Nonlinear Science (AREA)
- Measurement Of Radiation (AREA)
- Indication And Recording Devices For Special Purposes And Tariff Metering Devices (AREA)
- Measurement Of Current Or Voltage (AREA)
Abstract
Système de mesure numérique d'une grandeur y, dans lequel le convertisseur AN reçoit un signal adapté à plusieurs gammes définies par 10**n <y <10**n+1 (n entier variant par ex. de -2 à 3) et une mémoire de gamme détermine la place de la virgule dans la valeur numérique correspondante. On utilise un transducteur à caractéristique logarithmique dont la sortie UM = a (log y + 2) est appliquée à un amplificateur différentiel 55 en même temps qu'une tension (n+2)a produite par (n+2) sources de courant 68 débloquées par les commutateurs associés 66 à seuils respectifs a, 2a...5a quand UM > a (2**e gamme : n = 1), UM > 2a (3**e gamme : n = 0, cas indiqué par les traits épais) etc., pour produire le signal différentiel a log d (en posant y = d.l0**n dans chaque gamme n+3). Une fonction précise de d peut être obtenue par linéarisation 58 adaptée à la gamme et le nombre d'impulsions correspondant fourni par le convertisseur AN est aiguillé sur l'entrée III d'un compteur décimal 64 qui permet d'affecter à l'unité le poids approprié (10 degrés , dans l'exemple choisi). Application particulière à la détection de radiations nucléaires.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2648635A DE2648635C2 (de) | 1976-10-27 | 1976-10-27 | Meßanordnung mit einem Analog-Digital-Wandler |
Publications (1)
Publication Number | Publication Date |
---|---|
FR2369569A1 true FR2369569A1 (fr) | 1978-05-26 |
Family
ID=5991532
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7732409A Withdrawn FR2369569A1 (fr) | 1976-10-27 | 1977-10-27 | Systeme de mesure a convertisseur analogique-numerique |
Country Status (5)
Country | Link |
---|---|
AU (1) | AU3006077A (fr) |
DE (1) | DE2648635C2 (fr) |
FR (1) | FR2369569A1 (fr) |
IT (1) | IT1087097B (fr) |
NL (1) | NL7711631A (fr) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2439975A1 (fr) * | 1978-10-23 | 1980-05-23 | Otdel Fiz Nerazrushajuschego | Dispositif pour la mesure d'epaisseurs de revetements |
EP0170813A1 (fr) * | 1984-07-19 | 1986-02-12 | GRUNDIG E.M.V. Elektro-Mechanische Versuchsanstalt Max Grundig holländ. Stiftung & Co. KG. | Commutateur de gamme pour appareil de mesure |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4635057A (en) * | 1985-06-24 | 1987-01-06 | Caterpillar Inc. | Remote sensor with compensation for lead resistance |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2062241A1 (de) * | 1970-12-17 | 1972-06-22 | Slevogt K | Automatische Bereichsumschaltung fur Messgerate |
FR2198318A1 (fr) * | 1972-08-30 | 1974-03-29 | Max Bo | |
FR2236315A1 (en) * | 1973-07-06 | 1975-01-31 | Coulter W | Circuit for splitting measuring range of pulse amplitude processing un - uses analogue digital converter with lower amplitude acceptance range feeding logic |
FR2331205A1 (fr) * | 1975-11-07 | 1977-06-03 | Motorola Inc | Convertisseur analogique-numerique, en cascade parallele |
-
1976
- 1976-10-27 DE DE2648635A patent/DE2648635C2/de not_active Expired
-
1977
- 1977-10-24 NL NL7711631A patent/NL7711631A/xx not_active Application Discontinuation
- 1977-10-26 IT IT28999/77A patent/IT1087097B/it active
- 1977-10-26 AU AU30060/77A patent/AU3006077A/en active Pending
- 1977-10-27 FR FR7732409A patent/FR2369569A1/fr not_active Withdrawn
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2062241A1 (de) * | 1970-12-17 | 1972-06-22 | Slevogt K | Automatische Bereichsumschaltung fur Messgerate |
FR2198318A1 (fr) * | 1972-08-30 | 1974-03-29 | Max Bo | |
FR2236315A1 (en) * | 1973-07-06 | 1975-01-31 | Coulter W | Circuit for splitting measuring range of pulse amplitude processing un - uses analogue digital converter with lower amplitude acceptance range feeding logic |
FR2331205A1 (fr) * | 1975-11-07 | 1977-06-03 | Motorola Inc | Convertisseur analogique-numerique, en cascade parallele |
Non-Patent Citations (1)
Title |
---|
EXBK/75 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2439975A1 (fr) * | 1978-10-23 | 1980-05-23 | Otdel Fiz Nerazrushajuschego | Dispositif pour la mesure d'epaisseurs de revetements |
EP0170813A1 (fr) * | 1984-07-19 | 1986-02-12 | GRUNDIG E.M.V. Elektro-Mechanische Versuchsanstalt Max Grundig holländ. Stiftung & Co. KG. | Commutateur de gamme pour appareil de mesure |
Also Published As
Publication number | Publication date |
---|---|
IT1087097B (it) | 1985-05-31 |
DE2648635B1 (de) | 1978-01-19 |
DE2648635C2 (de) | 1978-09-28 |
AU3006077A (en) | 1979-05-03 |
NL7711631A (nl) | 1978-05-02 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |