GB1401505A - Electrical circuitry for providing a measure of frequency of a cyclically varying input signal - Google Patents

Electrical circuitry for providing a measure of frequency of a cyclically varying input signal

Info

Publication number
GB1401505A
GB1401505A GB5213372A GB5213372A GB1401505A GB 1401505 A GB1401505 A GB 1401505A GB 5213372 A GB5213372 A GB 5213372A GB 5213372 A GB5213372 A GB 5213372A GB 1401505 A GB1401505 A GB 1401505A
Authority
GB
United Kingdom
Prior art keywords
voltage
pulse
circuit
frequency
usp
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
GB5213372A
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.)
KNORR BREMSE GmbH
Original Assignee
KNORR BREMSE GmbH
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 KNORR BREMSE GmbH filed Critical KNORR BREMSE GmbH
Publication of GB1401505A publication Critical patent/GB1401505A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/17—Using electrical or electronic regulation means to control braking
    • B60T8/172—Determining control parameters used in the regulation, e.g. by calculations involving measured or detected parameters
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
    • G01P3/42—Devices characterised by the use of electric or magnetic means
    • G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
    • G01P3/48—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage
    • G01P3/4802—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage by using electronic circuits in general
    • 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
    • G01R23/06—Arrangements for measuring frequency, e.g. pulse repetition rate; Arrangements for measuring period of current or voltage by converting frequency into an amplitude of current or voltage
    • G01R23/09—Arrangements for measuring frequency, e.g. pulse repetition rate; Arrangements for measuring period of current or voltage by converting frequency into an amplitude of current or voltage using analogue integrators, e.g. capacitors establishing a mean value by balance of input signals and defined discharge signals or leakage

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Power Engineering (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)
  • Electronic Switches (AREA)
  • Dc-Dc Converters (AREA)
  • Regulating Braking Force (AREA)
  • Measurement Of Current Or Voltage (AREA)

Abstract

1401505 Frequency to voltage converters KNORR BREMSE GmbH 10 Nov 1972 [10 Nov 1971] 52133/72 Heading H3A A frequency to voltage converter comprises a first circuit 1-5 for producing a first intermediate signal Uc whose magnitude is at a given point of each cycle of the input signal proportional to the duration of the last preceding such cycle, a second circuit 6, 7 responsive to the signal Uc to produce a second intermediate signal Usp whose magnitude is maintained equal or proportional to the magnitude of Uc at the given point in the relevant input cycle, a third circuit 8, 9 responsive to the signal Usp to produce a pulse train having a pulse duration proportional to the magnitude of Usp and an Rc circuit 11, 12 connected to receive the pulse train to produce an output voltage proportional to the input frequency. In operation, a first monostable circuit 1 is responsive to the trailing edge of an input signal Uf to produce a pulse U 1 which renders an FET6 conducting during its pulse duration to transfer the peak voltage of Uc stored at capacitor 4 to another capacitor 7. A second monostable circuit 2 is responsive to the trailing edge of pulse U 1 to produce a further pulse of short duration to quickly discharge the capacitor 4 via a switch 3. The capacitor 4 starts charging again via a current source 5. A monostable multivibrator 9 has its output repetition rate controlled by an astable multivibrator 8 and its output mark to space ratio controlled by the voltage Usp via a voltage to current converter 10. If the input signal fails or its frequency falls below an acceptable value, the charge voltage across capacitor 4 increases and the circuitry 22-30 act in such a manner to increase the voltage Usp to a limiting value so that the final output Ua falls sufficiently low for activating an anti-skid control system in a vehicle whose wheel speed is being measured.
GB5213372A 1971-11-10 1972-11-10 Electrical circuitry for providing a measure of frequency of a cyclically varying input signal Expired GB1401505A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19712155834 DE2155834C3 (en) 1971-11-10 1971-11-10 Frequency-voltage converter, especially for anti-lock and anti-skid devices in vehicles

Publications (1)

Publication Number Publication Date
GB1401505A true GB1401505A (en) 1975-07-16

Family

ID=5824714

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5213372A Expired GB1401505A (en) 1971-11-10 1972-11-10 Electrical circuitry for providing a measure of frequency of a cyclically varying input signal

Country Status (12)

Country Link
AT (1) AT325162B (en)
CH (1) CH554541A (en)
DD (1) DD100087A5 (en)
DE (1) DE2155834C3 (en)
ES (1) ES408408A1 (en)
FR (1) FR2159409B1 (en)
GB (1) GB1401505A (en)
HU (1) HU165286B (en)
IT (1) IT966833B (en)
RO (1) RO77616A (en)
SE (1) SE387074B (en)
SU (1) SU797616A3 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1510943A (en) * 1976-04-27 1978-05-17 Mullard Ltd Tachogenerator output signal processing circuits and motor speed control systems including such circuits
DE3430711C2 (en) * 1984-05-09 1986-03-20 Telefunken electronic GmbH, 7100 Heilbronn Frequency-to-voltage converter
ATE77153T1 (en) * 1985-03-01 1992-06-15 Vaillant Gmbh METHOD OF PROCESSING A MEASUREMENT EXISTING AS A FREQUENCY.

Also Published As

Publication number Publication date
DE2155834B2 (en) 1980-05-14
FR2159409B1 (en) 1979-03-30
IT966833B (en) 1974-02-20
CH554541A (en) 1974-09-30
DE2155834A1 (en) 1973-06-07
RO77616A (en) 1981-11-04
FR2159409A1 (en) 1973-06-22
DD100087A5 (en) 1973-09-05
HU165286B (en) 1974-07-27
DE2155834C3 (en) 1981-01-29
AT325162B (en) 1975-10-10
SE387074B (en) 1976-08-30
SU797616A3 (en) 1981-01-15
ES408408A1 (en) 1975-10-01

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Legal Events

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