PICKUP OF THE ANGULAR SPEED OF A ROTATING OBJECT

• US 3,789,673 A
• Filed: 10/27/1971
• Issued: 02/05/1974
• Est. Priority Date: 10/27/1971
• Status: Expired due to Term

• Current Assignee: Berlin German Semenovich, Dmitry Dmitrievich Shenker, Valery Germanovich Serebrenny
• Original Assignee: Berlin German Semenovich, Dmitry Dmitrievich Shenker, Valery Germanovich Serebrenny
• Inventors: Shenker, Dmitry Dmitrievich, Serebrenny, Valery Germanovich, Berlin, German Semenovich
• Primary Examiner(s): Gill, James J.
• Application Number:
  US05/192,913
• Time in Patent Office: 832 Days
• Field of Search: 73/505 313/146,147,152 315/357
• US Class Current: 73/504.16
• CPC Class Codes: G01C 19/5607 using vibrating tuning forks double-ended tuning forks using planar vibrating masses suspended at opposite ends G01C19/5719

Abstract

The essence of the invention is that the pickup of the angular speed of a rotating object includes a housing receiving therein a fork of the tuning fork kind. The pickup also comprises a device for exciting oscillation of the prongs of this fork and a device for measuring the torsional oscillation of this fork, developed upon said pickup being rotated together with the associated object about the axis of symmetry thereof, the last-mentioned device being disposed adjacent to the stem of the fork. At least one of these two devices is in the form of an electronicmechanical transducer with a mechanically controlled electrode. For example, when it is the device for exciting oscillation of the prongs of the fork that is made in the form of the electronic-mechanical transducer, then the mechanically controlled electrode thereof can be formed by the prongs of the fork, acting as the anode of this transducer. Directly adjacent to the prongs of the fork there is mounted a winding about a core, adapted to excite oscillation of the fork, the cathode of this device being positioned intermediate of the prongs of the fork.

Claims

1. A pickup of the angular speed of a rotating object, comprising:

a housing, a fork received in said housing, the prongs of said fork;

the stem of said fork;

a device for exciting oscillation of said prongs of said fork, disposed within said housing;

a device for measuring the torsional oscillation of said fork, developed upon said pickup together with the associated object being rotated about the axis of symmetry of said fork, said last-mentioned device being disposed adjacent to said stem of said fork;

at least one of said device being in the form of an electronic-mechanical transducer including a mechanically controlled electrode, said device for exciting the oscillation of said prongs of said fork being in the form of said electronicmechanical transducer of which said mechanically controlled electrode is formed by said prongs of said fork, said prongs being the anode of said transducer, there being disposed adjacent to said prongs at least one winding about a core adapted to excite oscillation of said prongs of said fork and connected to said anode of the transducer, the cathode of the said transducer being disposed inTermediate of said prongs of said fork.

2. A pickup according to claim 1 wherein said device for measuring the torsional oscillation of said fork is in the form of said electronic-mechanical transducer of which said mechanically controlled electrode is formed by at least one plate rigidly mounted on said stem of said fork, said plate acting as the anode of said transducer and being displaceable in respect of the cathode of said transducer upon development of the torsional oscillation of said fork, thereby varying periodically the anode current at the natural frequency of oscillation of said fork with the amplitude of the variable component of said current proportional to the angular speed of said rotating object, the working surface of said cathode extending parallel with the plane of said anode.

3. A pickup according to claim 2, wherein said device for exciting oscillation of said prongs of said fork is the form of an electronic-mechanical transducer of which the mechanically controlled electrode is a grid mechanically connected with said prongs of said fork, the anode and the cathode of said transducer being positioned, respectively, to the opposite sides of said grid and parallel therewith, there being positioned directly adjacent to said prongs of said fork at least one winding about a core, adapted to excite oscillation of said prongs of said fork and connected to said anode of said transducer.

4. A pickup according to claim 1, wherein said device for measuring the torsional oscillation of said fork is in the form of an electronic-mechanical transducer of which the mechanically controlled electrode is formed by at least one plate rigidly mounted on said stem of said fork, said plate acting as the anode of said transducer and being displaceable in respect of the cathode of said transducer upon development of the torsional oscillation of said fork, thereby varying periodically the anode current at the natural frequency of oscillation of said fork with the amplitude of the variable component of said current proportional to the angular speed of said rotating object, the working surface of said cathode extending parallel with the plane of said anode.

5. A pickup according to claim 1, wherein said device for exciting oscillation of said prongs of said fork is in the form of said electronic-mechanical transducer of which said mechanically controlled electrode is a grid mechanically connected with said prongs of said fork, the anode and the cathode of said transducer being positioned, respectively, to the opposite sides of said grid and parallel therewith, there being positioned directly adjacent to said prongs of said fork at least one winding about a core, adapted to excite oscillation of said prongs of said prongs of said fork and connected to said anode of said transducer.

6. A pickup according to claim 5, wherein said device for measuring the torsional oscillation of said fork is in the form of an electronic-mechanical transducer of which the mechanically controlled electrode is a grid mechanically connected with said stem of said fork and displaceable in respect of the cathode and anode of said transducer upon development of the torsional oscillation of said fork, which brings about periodic variation of the anode current at the natural frequency of oscillation of said fork with the amplitude of the variable component of said current proportional to the angular speed of said rotating object, the respective working surfaces of said cathode and said anode being parallel with the plane of said grid.

7. A pickup according to claim 1 wherein said device for measuring the torsional oscillation of said fork is in the form of an electronic-mechanical transducer of which the mechanically controlled electrode is a grid mechanically connected with said stem of said fork and displaceable in respect of the cathode and anode of said transducer upon development of the torsional oscillation of said fork, which brings about periodic variation of the anode current at the Natural frequency of oscillation of said fork with the amplitude of the variable component of said current proportional to the angular speed of said rotating object, the respective working surfaces of said cathode and said anode being parallel with the plane of said grid.