GB1222142A - An analogue-digital converter with automatic correction of its recoding factor - Google Patents
An analogue-digital converter with automatic correction of its recoding factorInfo
- Publication number
- GB1222142A GB1222142A GB29811/68A GB2981168A GB1222142A GB 1222142 A GB1222142 A GB 1222142A GB 29811/68 A GB29811/68 A GB 29811/68A GB 2981168 A GB2981168 A GB 2981168A GB 1222142 A GB1222142 A GB 1222142A
- Authority
- GB
- United Kingdom
- Prior art keywords
- counter
- time
- zero point
- degrees
- cycles
- 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
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
- G01R19/18—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using conversion of DC into AC, e.g. with choppers
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/02—Means for indicating or recording specially adapted for thermometers
- G01K1/028—Means for indicating or recording specially adapted for thermometers arrangements for numerical indication
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M1/00—Analogue/digital conversion; Digital/analogue conversion
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M1/00—Analogue/digital conversion; Digital/analogue conversion
- H03M1/66—Digital/analogue converters
- H03M1/665—Digital/analogue converters with intermediate conversion to phase of sinusoidal or similar periodical signals
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Measuring Frequencies, Analyzing Spectra (AREA)
Abstract
1,222,142. Selective signalling. LICENTIA PATENT - VERWALTUNGS G.m.b.H. 21 June, 1968 [23 June, 1967; 8 Sept., 1967], No.29811/68. Heading G4H. In a circuit in which a voltage, for example from a temperature sensitive resistor RÁ Fig. 2, is digitized by amplifying 7 the voltage, converting 8 into a corresponding frequency, and counting 12 the cycles thereof for a known period, the counting period is determined by a " zero point " number 11 and "time " number 16, whereby the final count can be made to be zero for 0 degrees and 10,000 for 100 degrees, for example, and means 4, 5 are provided for periodically entering reference voltages corresponding to 0 degrees and to 100 degrees during periodic calibrating intervals whereby the stored numbers can be checked and corrected. In normal operation, initially the complements of the stored " zero point " and " time " numbers are transferred into zero point 10 and time 15 counters respectively. A gate 9 is then opened and cycles of the unknown frequency pass to the zero point counter 10. When this counter becomes full, cycles then pass to the main measuring counter 12, and this continues until the time counter 15 has become full of clock-pulses. During a calibrating period first the 100 degrees voltage is entered, and a cycle, as outlined above commences. If the stored numbers are correct then the main counter and the time counter should become full simultaneously. If one becomes full before the other, one of two gates 13, 14 is opened allowing low frequency clock pulses to increase or decrease the stored " time " number 16, until both have become full. The " time " number having been corrected, the 0 degree voltage is applied and the " zero point " number is corrected. To effect this, cycles of the corresponding frequency are counted in the zero point counter 10 for the entire period determined by the time counter 15, and the result is taken as the new zero point number.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEL0056813 | 1967-06-23 | ||
DE19671591959 DE1591959A1 (en) | 1967-09-08 | 1967-09-08 | Analog-digital converter with automatic calibration of start of scale and scale factor |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1222142A true GB1222142A (en) | 1971-02-10 |
Family
ID=25753367
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB29811/68A Expired GB1222142A (en) | 1967-06-23 | 1968-06-21 | An analogue-digital converter with automatic correction of its recoding factor |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB1222142A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0193950A2 (en) * | 1985-03-07 | 1986-09-10 | Spacelabs, Inc. | Method and apparatus for automatic temperature measurement |
WO2001094191A1 (en) * | 2000-06-05 | 2001-12-13 | Abb Ab | A method and a plant for assembly |
-
1968
- 1968-06-21 GB GB29811/68A patent/GB1222142A/en not_active Expired
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0193950A2 (en) * | 1985-03-07 | 1986-09-10 | Spacelabs, Inc. | Method and apparatus for automatic temperature measurement |
EP0193950A3 (en) * | 1985-03-07 | 1988-06-15 | Spacelabs, Inc. | Method and apparatus for automatic temperature measurement |
WO2001094191A1 (en) * | 2000-06-05 | 2001-12-13 | Abb Ab | A method and a plant for assembly |
CZ299134B6 (en) * | 2000-06-05 | 2008-04-30 | Abb Ab | Method for assembling vehicle body or a part thereof in assembly line with at least one industrial robot |
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