GB1221551A - Improvements in or relating to an electromechanical oscillator - Google Patents

Improvements in or relating to an electromechanical oscillator

Info

Publication number
GB1221551A
GB1221551A GB4482768A GB4482768A GB1221551A GB 1221551 A GB1221551 A GB 1221551A GB 4482768 A GB4482768 A GB 4482768A GB 4482768 A GB4482768 A GB 4482768A GB 1221551 A GB1221551 A GB 1221551A
Authority
GB
United Kingdom
Prior art keywords
circuit
exciter
output
transistors
electromechanical
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
GB4482768A
Inventor
Jiri Kratochvil
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.)
CESKE VUT STAVEBNI USTAV
Original Assignee
CESKE VUT STAVEBNI USTAV
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 CESKE VUT STAVEBNI USTAV filed Critical CESKE VUT STAVEBNI USTAV
Publication of GB1221551A publication Critical patent/GB1221551A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K5/00—Measuring temperature based on the expansion or contraction of a material
    • G01K5/48—Measuring temperature based on the expansion or contraction of a material the material being a solid
    • G01K5/56—Measuring temperature based on the expansion or contraction of a material the material being a solid constrained so that expansion or contraction causes a deformation of the solid
    • G01K5/58—Measuring temperature based on the expansion or contraction of a material the material being a solid constrained so that expansion or contraction causes a deformation of the solid the solid body being constrained at more than one point, e.g. rod, plate, diaphragm
    • G01K5/60—Measuring temperature based on the expansion or contraction of a material the material being a solid constrained so that expansion or contraction causes a deformation of the solid the solid body being constrained at more than one point, e.g. rod, plate, diaphragm the body being a flexible wire or ribbon
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L1/00—Measuring force or stress, in general
    • G01L1/10—Measuring force or stress, in general by measuring variations of frequency of stressed vibrating elements, e.g. of stressed strings
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
    • H03B5/00—Generation of oscillations using amplifier with regenerative feedback from output to input
    • H03B5/30—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element being electromechanical resonator

Abstract

1,221,551. Transistor oscillator circuits. CESKE VYSOKE UCENI TECHNICKE STAVEBNI USTAV. 20 Sept., 1968 [21 Sept., 1967], No. 44827/68. Heading H3T. [Also in Division G1] An electromechanical oscillator comprises an exciter and a mechanical oscillatory system having an electromechanical converter and a two-wire line connecting the converter in parallel with the exciter, with the exciter comprising at least one non-linear limiting circuit and at least one differentiating circuit, these being connected in cascade to form part of a closed feedback loop. In Fig. 2 the electromechanical converter 2, when oscillating, sends signals along line 3 to the preamplifier of transistors T2, T1 and to the Schmitt trigger of transistors T3, T4. The output can either be square wave or if required as a sine wave can be passed through transistor T7 and filter circuit 51-55. A feedback closed loop is completed via transistors T5, T6 of a differentiating circuit 12 having circuit values such that its output is synchronous with the output of 2. If the circuit is not self-starting, switch 4 when switched on, pulses line 3 to start the oscillations.
GB4482768A 1967-09-21 1968-09-20 Improvements in or relating to an electromechanical oscillator Expired GB1221551A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CS672667 1967-09-21

Publications (1)

Publication Number Publication Date
GB1221551A true GB1221551A (en) 1971-02-03

Family

ID=5414956

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4482768A Expired GB1221551A (en) 1967-09-21 1968-09-20 Improvements in or relating to an electromechanical oscillator

Country Status (4)

Country Link
CH (1) CH486685A (en)
DE (1) DE1798269C3 (en)
FR (1) FR1602115A (en)
GB (1) GB1221551A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102072763A (en) * 2010-11-05 2011-05-25 邓铁六 Unicoil steel string exciting and receiving circuit
WO2015195024A1 (en) * 2014-06-18 2015-12-23 Sondero Technologies Ab Device for measuring vibration frequency

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4118977A (en) * 1976-10-13 1978-10-10 The Foxboro Company Electric signal transmitter for vibrating-wire sensor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102072763A (en) * 2010-11-05 2011-05-25 邓铁六 Unicoil steel string exciting and receiving circuit
WO2015195024A1 (en) * 2014-06-18 2015-12-23 Sondero Technologies Ab Device for measuring vibration frequency

Also Published As

Publication number Publication date
DE1798269B2 (en) 1975-01-23
DE1798269C3 (en) 1975-08-28
CH486685A (en) 1970-02-28
FR1602115A (en) 1970-10-12
DE1798269A1 (en) 1971-11-25

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