GB1439815A - Measuring method - Google Patents

Measuring method

Info

Publication number
GB1439815A
GB1439815A GB4049973A GB4049973A GB1439815A GB 1439815 A GB1439815 A GB 1439815A GB 4049973 A GB4049973 A GB 4049973A GB 4049973 A GB4049973 A GB 4049973A GB 1439815 A GB1439815 A GB 1439815A
Authority
GB
United Kingdom
Prior art keywords
phase
phase shifter
voltage
shifter
aug
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
GB4049973A
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.)
New Zealand Inventions Development Authority
Original Assignee
New Zealand Inventions Development Authority
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 New Zealand Inventions Development Authority filed Critical New Zealand Inventions Development Authority
Publication of GB1439815A publication Critical patent/GB1439815A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R21/00—Arrangements for measuring electric power or power factor

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Resistance Or Impedance (AREA)

Abstract

1439815 Measuring power NEW ZEALAND INVENTIONS DEVELOPMENT AUTHORITY 28 Aug 1973 [28 Aug 1972] 40499/73 Heading G1U Audio-frequency power superimposed upon a supply network is measured by sampling the current and voltage in the network, rejecting the supply-frequency components from the samples, passing the voltage sample through an adjustable phase-shifter, extracting the required audiofrequency signal by a narrow band filter, and multiplying the resulting current and voltage signals. A measurement of volt-amps is made by adjusting the phase shifter to give the largest product, and a measurement of power-factor by adjusting the phase shifter to give the least product, the setting of the phase shifter then indicating the phase angle.
GB4049973A 1972-08-28 1973-08-28 Measuring method Expired GB1439815A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NZ16823372 1972-08-28

Publications (1)

Publication Number Publication Date
GB1439815A true GB1439815A (en) 1976-06-16

Family

ID=19916917

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4049973A Expired GB1439815A (en) 1972-08-28 1973-08-28 Measuring method

Country Status (2)

Country Link
GB (1) GB1439815A (en)
ZA (1) ZA735818B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112858783A (en) * 2021-01-08 2021-05-28 胜达克半导体科技(上海)有限公司 Efficient measurement method for power supply noise rejection ratio of audio power amplifier chip
CN115792478A (en) * 2023-02-06 2023-03-14 国网浙江省电力有限公司电力科学研究院 Method and system for realizing composite frequency test by using broadband volt-ampere characteristic meter

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112858783A (en) * 2021-01-08 2021-05-28 胜达克半导体科技(上海)有限公司 Efficient measurement method for power supply noise rejection ratio of audio power amplifier chip
CN115792478A (en) * 2023-02-06 2023-03-14 国网浙江省电力有限公司电力科学研究院 Method and system for realizing composite frequency test by using broadband volt-ampere characteristic meter
CN115792478B (en) * 2023-02-06 2023-05-16 国网浙江省电力有限公司电力科学研究院 Method and system for realizing composite frequency test by using broadband volt-ampere characteristic instrument

Also Published As

Publication number Publication date
AU5973773A (en) 1975-03-06
ZA735818B (en) 1974-11-27

Similar Documents

Publication Publication Date Title
GB1246893A (en) A phase adjust circuit for use in non-contact eddy current instruments
GB1439815A (en) Measuring method
ES445837A1 (en) Moisture indicating apparatus
GB1333429A (en) Frequency responsive apparatus
GB1428776A (en) Frequency-selective test apparatus
GB1490261A (en) Resistance measuring apparatus
GB1192749A (en) Method and Apparatus for Measuring a Property of a Dielectric Material
GB680311A (en) Improvements in or relating to apparatus for the measurement of peak strain
JPS5543420A (en) Metallic material examination device
JPS52104289A (en) Atomic spectrum generator
JPS5312373A (en) Measuring apparatus for temperature difference
JPS531570A (en) Measuring system
SU532021A1 (en) Moment meter
JPS51131287A (en) Method and system to measure the distance of signals generated for the limination of phase lag inside the unit
FR2124744A5 (en) Measuring organic content of water - using electrical conductivity and refractive index measurements
JPS5216251A (en) Pulse separator
JPS5655848A (en) Measurer for ion density
Bradshaw et al. A conductivity bridge for the measurement of salinity of sea water
JPS5215376A (en) Charge-degree meter
JPS5258564A (en) Concentration meter
GB1428795A (en) Method and apparatus for testing high voltage divider
FR2330002A1 (en) Ion concentration measurement in liquid - is performed by comparison with reference liquid of variable ion concentration to achieve wide range
GB863169A (en) An instrument for indicating the differential between two or more measurements
CA878118A (en) Measurement of characteristic of electrical signal by positioning measured portions of a corresponding pair of opposite phase signals in coincidence
HEMMIG Investigation of natural frequencies of circular plates with mixed boundary conditions[M. S. Thesis]

Legal Events

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