GB1209985A - Improvements in or relating to vehicle detector circuit arrangements - Google Patents

Improvements in or relating to vehicle detector circuit arrangements

Info

Publication number
GB1209985A
GB1209985A GB4525868A GB4525868A GB1209985A GB 1209985 A GB1209985 A GB 1209985A GB 4525868 A GB4525868 A GB 4525868A GB 4525868 A GB4525868 A GB 4525868A GB 1209985 A GB1209985 A GB 1209985A
Authority
GB
United Kingdom
Prior art keywords
loop
vehicle detector
circuit
relating
detector circuit
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
GB4525868A
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Publication of GB1209985A publication Critical patent/GB1209985A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
    • G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
    • G01R27/26—Measuring inductance or capacitance; Measuring quality factor, e.g. by using the resonance method; Measuring loss factor; Measuring dielectric constants ; Measuring impedance or related variables
    • G01R27/2611—Measuring inductance
    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/01—Detecting movement of traffic to be counted or controlled
    • G08G1/042—Detecting movement of traffic to be counted or controlled using inductive or magnetic detectors

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Traffic Control Systems (AREA)

Abstract

1,209,985. Road vehicle detectors. SIEMENS A.G. 24 Sept., 1968 [25 Sept., 1967], No. 45258/68. Heading G4Q. An inductive-loop vehicle detector comprises a phase comparator 12, 13 to one input of which is applied a voltage signal that is produced across an impedance formed by a series combination of an untuned loop 5 a resistor 6 and a resonant circuit 7, 8, 9; and to the other input of which the voltage across the circuit 7, 8, 9 only is applied. The resistor 6 preferably has a resistance equal to the reactance of the loop, and the circuit 7, 8, 9 may be de-tuned to adjust the comparator output signal level. When a vehicle passes over the loop, the resulting phase shift results in an output signal at 17.
GB4525868A 1967-09-25 1968-09-24 Improvements in or relating to vehicle detector circuit arrangements Expired GB1209985A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DES0111988 1967-09-25

Publications (1)

Publication Number Publication Date
GB1209985A true GB1209985A (en) 1970-10-28

Family

ID=7531364

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4525868A Expired GB1209985A (en) 1967-09-25 1968-09-24 Improvements in or relating to vehicle detector circuit arrangements

Country Status (3)

Country Link
CH (1) CH481439A (en)
GB (1) GB1209985A (en)
NL (1) NL151797B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3685013A (en) * 1970-08-14 1972-08-15 Joseph L Brickner Self-adjusting vehicle detector system
US4296401A (en) * 1977-01-11 1981-10-20 Redland Automation Limited Inductive vehicle detector

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2817670C2 (en) * 1978-04-19 1986-04-17 Elmeg Elektro-Mechanik Gmbh, 3150 Peine Induction loop detector for traffic counting devices
EP0106843A4 (en) * 1982-04-16 1984-07-04 Herman Lanier Watson Imrpoved inductance to frequency converter circuit.

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3685013A (en) * 1970-08-14 1972-08-15 Joseph L Brickner Self-adjusting vehicle detector system
US4296401A (en) * 1977-01-11 1981-10-20 Redland Automation Limited Inductive vehicle detector

Also Published As

Publication number Publication date
NL151797B (en) 1976-12-15
NL6813629A (en) 1969-03-27
CH481439A (en) 1969-11-15

Similar Documents

Publication Publication Date Title
GB1226591A (en)
GB1306207A (en)
GB1338062A (en) Prescence detector
GB1209985A (en) Improvements in or relating to vehicle detector circuit arrangements
GB1173885A (en) Voltage-Controlled Oscillator with Time-Ratio Control
GB1093538A (en) Improvements in or relating to switched frequency oscillators
GB773470A (en) Improvements in or relating to detector-circuit arrangements
GB1013022A (en) Improvements in or relating to tuning indicators for am/fm receivers
GB1122329A (en) Inductive loop vehicle detector
GB1020649A (en) Telemetering of analog and digital information
GB1126030A (en) Improvements in or relating to frequency demodulators
IE32648L (en) Angle modulation detectors
GB1046700A (en) Improvements in or relating to automatic phase control circuits
GB1404886A (en) Phase shifting circuit
GB1533432A (en) Fm tuner
ES362807A1 (en) Frequency discriminator device. (Machine-translation by Google Translate, not legally binding)
GB1046806A (en) Improvement in wide-band discriminators
GB1243929A (en) Amplitude protection circuit
ES359278A1 (en) Improvements in radio-wave receivers. (Machine-translation by Google Translate, not legally binding)
GB1189650A (en) Adjustable Current Sensitive Relay.
GB963844A (en) A detector for f.m. signals
GB1020375A (en) Improvements in synchronous detection circuits
GB1170028A (en) F.M. Discriminator
GB1245641A (en) An automatic range-changing switch for electrical measuring instruments
GB1090882A (en) Improvements in and relating to timebase frequency control in television receivers

Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees