AU6425400A - Device and method for determining tone ringing frequency - Google Patents
Device and method for determining tone ringing frequencyInfo
- Publication number
- AU6425400A AU6425400A AU64254/00A AU6425400A AU6425400A AU 6425400 A AU6425400 A AU 6425400A AU 64254/00 A AU64254/00 A AU 64254/00A AU 6425400 A AU6425400 A AU 6425400A AU 6425400 A AU6425400 A AU 6425400A
- Authority
- AU
- Australia
- Prior art keywords
- duration
- zero crossing
- time
- evaluation
- crossing signal
- 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.)
- Abandoned
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R23/00—Arrangements for measuring frequencies; Arrangements for analysing frequency spectra
- G01R23/02—Arrangements for measuring frequency, e.g. pulse repetition rate; Arrangements for measuring period of current or voltage
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q1/00—Details of selecting apparatus or arrangements
- H04Q1/18—Electrical details
- H04Q1/30—Signalling arrangements; Manipulation of signalling currents
- H04Q1/44—Signalling arrangements; Manipulation of signalling currents using alternate current
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Devices For Supply Of Signal Current (AREA)
- Telephone Function (AREA)
- Measuring Frequencies, Analyzing Spectra (AREA)
- Monitoring And Testing Of Transmission In General (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
- Selective Calling Equipment (AREA)
- Manipulation Of Pulses (AREA)
- Telephonic Communication Services (AREA)
- Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
Abstract
The invention relates to a method for determining tone ringing frequency which comprises the following steps: Forming a zero crossing signal from a tone ringing signal by comparing the tone ringing signal with a threshold (S), whereby the zero crossing signal has a succession of alternatively rising and falling edges between two zero crossing signal values; measuring the respective duration between the adjacent rising and falling edges of the zero crossing signal; comparing the measured duration with a predetermined duration limiting value (tg); defining an evaluation start time (t1) if a measured duration is greater than or equal to the duration limiting value (tg), whereby the evaluation start time (t1) is the instant of the subsequent edge; defining an evaluation stop time (t2) if a measured duration with an identical zero crossing signal value for the time occurring after the subsequent time is greater than or equal to the duration limiting value (tg), whereby the evaluation stop time (t2) is the instant of the subsequent edge, and; determining the frequency (f) using the measured time difference between the evaluation start time (t1) and the evaluation stop time (t2).
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19930458A DE19930458C2 (en) | 1999-07-02 | 1999-07-02 | Ringing frequency determination apparatus and method |
DE19930458 | 1999-07-02 | ||
PCT/DE2000/002021 WO2001003445A2 (en) | 1999-07-02 | 2000-06-21 | Device and method for determining tone ringing frequency |
Publications (1)
Publication Number | Publication Date |
---|---|
AU6425400A true AU6425400A (en) | 2001-01-22 |
Family
ID=7913370
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
AU64254/00A Abandoned AU6425400A (en) | 1999-07-02 | 2000-06-21 | Device and method for determining tone ringing frequency |
Country Status (8)
Country | Link |
---|---|
EP (1) | EP1192810B1 (en) |
JP (1) | JP2003503977A (en) |
CN (1) | CN1359594A (en) |
AT (1) | ATE229725T1 (en) |
AU (1) | AU6425400A (en) |
DE (3) | DE19930458C2 (en) |
ES (1) | ES2188566T3 (en) |
WO (1) | WO2001003445A2 (en) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10029133A1 (en) † | 2000-06-14 | 2002-01-03 | Hilti Ag | Electric hand tool device with tool |
JP2010169555A (en) * | 2009-01-23 | 2010-08-05 | Sanyo Electric Co Ltd | Pulse period measuring method |
US20180188302A1 (en) * | 2015-06-26 | 2018-07-05 | Hewlett Packard Enterprise Development Lp | Determining an alternating current (ac) characteristic from a waveform |
CN105353212B (en) * | 2015-10-13 | 2017-12-29 | 珠海格力电器股份有限公司 | Method and device for detecting signal frequency |
CN110596456A (en) * | 2019-08-09 | 2019-12-20 | 广州汉光电气股份有限公司 | Power grid frequency testing method |
CN112362964A (en) * | 2020-10-26 | 2021-02-12 | 广东电网有限责任公司 | Voltage frequency measuring device and method |
CN116754831B (en) * | 2023-08-16 | 2023-11-07 | 北京智芯微电子科技有限公司 | Harmonic interference resistant frequency measurement method and device applied to intelligent circuit breaker |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4061885A (en) * | 1975-12-17 | 1977-12-06 | Motorola, Inc. | Digital tone decoder |
US5007000A (en) * | 1989-06-28 | 1991-04-09 | International Telesystems Corp. | Classification of audio signals on a telephone line |
US5023906A (en) * | 1990-04-24 | 1991-06-11 | The Telephone Connection | Method for monitoring telephone call progress |
EP0566928A3 (en) * | 1992-04-24 | 1994-08-10 | Alcatel Australia | Tone detection method for telephone subset |
JP2964994B2 (en) * | 1997-06-06 | 1999-10-18 | 日本電気株式会社 | Period measurement circuit |
US5901219A (en) * | 1997-08-27 | 1999-05-04 | 3Com Corporation | Method for ring signal detection |
-
1999
- 1999-07-02 DE DE19930458A patent/DE19930458C2/en not_active Expired - Fee Related
-
2000
- 2000-06-21 ES ES00951233T patent/ES2188566T3/en not_active Expired - Lifetime
- 2000-06-21 CN CN00809878A patent/CN1359594A/en active Pending
- 2000-06-21 DE DE10081895T patent/DE10081895D2/en not_active Expired - Fee Related
- 2000-06-21 JP JP2001508175A patent/JP2003503977A/en not_active Withdrawn
- 2000-06-21 AT AT00951233T patent/ATE229725T1/en not_active IP Right Cessation
- 2000-06-21 EP EP00951233A patent/EP1192810B1/en not_active Expired - Lifetime
- 2000-06-21 DE DE50000939T patent/DE50000939D1/en not_active Expired - Fee Related
- 2000-06-21 WO PCT/DE2000/002021 patent/WO2001003445A2/en active IP Right Grant
- 2000-06-21 AU AU64254/00A patent/AU6425400A/en not_active Abandoned
Also Published As
Publication number | Publication date |
---|---|
DE50000939D1 (en) | 2003-01-23 |
CN1359594A (en) | 2002-07-17 |
WO2001003445A3 (en) | 2001-10-25 |
DE19930458C2 (en) | 2001-06-21 |
WO2001003445A2 (en) | 2001-01-11 |
DE19930458A1 (en) | 2001-01-18 |
EP1192810B1 (en) | 2002-12-11 |
DE10081895D2 (en) | 2002-07-25 |
ATE229725T1 (en) | 2002-12-15 |
ES2188566T3 (en) | 2003-07-01 |
JP2003503977A (en) | 2003-01-28 |
EP1192810A2 (en) | 2002-04-03 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP1905662A3 (en) | Railway vehicle detection | |
WO2002075334A3 (en) | Apparatus and method for measuring and probability estimating for clock skews | |
MX2010001526A (en) | Circuit device and method of measuring clock jitter. | |
TW200632290A (en) | Light detection circuit | |
DE68927178D1 (en) | ENERGY-SAVING METHOD AND DEVICE FOR A PART OF A CLOCK-RELATED MESSAGE SIGNAL | |
TWI263448B (en) | Wireless communication system having adaptive threshold for timing deviation measurement and method | |
WO2003001684A3 (en) | A timing estimation method and apparatus for a location system | |
DE60118831D1 (en) | Method and device for speech detection | |
AU6425400A (en) | Device and method for determining tone ringing frequency | |
KR940006109A (en) | Sync signal detector and sync signal detection method | |
WO2003056348A3 (en) | Method for determining the frequency of a pulse input signal over a wide frequency range | |
WO2003107349A3 (en) | Methods and apparatus for delay circuit | |
ATE363781T1 (en) | DEVICE AND METHOD FOR EYE PATTERN MEASURING A DIGITAL SIGNAL | |
AU2001287787A1 (en) | Method and device for measuring a line attenuation | |
DK0829734T3 (en) | Method and apparatus for measuring the duration difference of an electrical, electromagnetic or acoustic signal | |
WO2004034619A3 (en) | System and method for rate agile adaptive clocking in a packet-based network | |
WO2002095513A3 (en) | Method for operating a position measuring device | |
WO2001091309A3 (en) | Device and method for verifying the reception of a signal with a predetermined frequency | |
EP1172662A3 (en) | Counter verification circuit | |
AU2001274254A1 (en) | Method and apparatus of producing a digital depiction of a signal | |
EP1187372A3 (en) | Apparatus and method for bit rate control of optical receiver | |
WO2002031451A3 (en) | Apparatus and method for detecting the location, intensity and initiation time of an energy pulse | |
JPH05134032A (en) | Method and circuit apparatus for identifying signal accompanying noise | |
WO2002001245A3 (en) | System and method of determining the frequency of a coherent burst signal | |
CN101272420A (en) | Busy tone detecting method and apparatus |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
MK6 | Application lapsed section 142(2)(f)/reg. 8.3(3) - pct applic. not entering national phase |