TELEMETRY MEASURING APPARATUS

• US 3,596,262 A
• Filed: 01/08/1968
• Issued: 07/27/1971
• Est. Priority Date: 01/08/1968
• Status: Expired due to Term

• Current Assignee: Harvey S. Benson, William L. Rollwitz
• Original Assignee: Harvey S. Benson, William L. Rollwitz
• Inventors: Rollwitz, William L., Benson, Harvey S.
• Application Number:
  US04/696,370
• Time in Patent Office: 1,296 Days
• US Class Current: 340/870.37
• CPC Class Codes: G01K 1/024 for remote indication
• CPC Class Codes: G01L 19/08 Means for indicating or recording, e.g. for remote indication
• CPC Class Codes: G01L 19/086 for remote indication
• CPC Class Codes: H02K 35/02 with moving magnets and stationary coil systems
• CPC Class Codes: H02K 7/1807 Rotary generators H02K7/006 takes precedence
• CPC Class Codes: H02K 7/1892 Generators with parts oscillating or vibrating about an axis

Abstract

An electrical measuring and telemetry apparatus for monitoring physical conditions of objects. A magnetic power generator having parts movable in response to the motion of an object to generate electrical power and in which the condition of the object such as temperature, stress, strain or pressure is measured by an electrical transducer to vary the signal output from a transmitter which receives the generated power and transmits electrical signals in response to the condition being measured. A temperature measuring apparatus having a power source, an electrical transmitter having a tank circuit for transmitting electrical signals whose frequency is controlled by the tank circuit, and a temperature sensitive capacitor positioned adjacent the object and electrically connected in the tank circuit thereby varying the transmitted signals in proportion to the temperature of the object. A power generator having a coil and magnet movable relative to each other to generate electrical power in response to the motion of the object. A power generator having first and second members one of which is fixed and the second of which moves relative to the fixed member, the first member being a circular toothed disc and the second member including two soft iron pieces having a pickup coil wound thereon and a permanent magnet positioned between the soft iron pieces whereby a voltage is generated in the coil when the coil moves relative to the toothed disc. A magnetic power generator for providing a power source in response to rotating, oscillating, or reciprocating movement of an object.

Claims

1. In combination with a repetitive moving apparatus of a telemetry measuring apparatus for measuring a property of the apparatus comprising:

a magnetic power generator means including a pickup coil, a magnet and a core movable relative to each other, one of which is secured to the moving apparatus thereby generating electrical power in the coil when the apparatus moves. a rectifier connected to the coil for rectifying the generated electrical power, an electrical transmitter connected to the rectifier for transmitting electrical signals, and transducer sensing means measuring a property of the apparatus and electrically connected and varying the transmitter signal in proportion to variations in said measured property.

2. The apparatus of claim 1 wherein the generator includes, a nonmagnetic tube in which the magnet is movable and said coil is positioned about the tube, a stop at each end of the tube thereby retaining said magnet in said tube, and a magnetic core adjacent the tube providing a low reluctance magnetic path between the ends of the tube.

3. The apparatus of claim 1 wherein the transducer sensing means is a capacitor having a dielectric constant and a capacitance which varies proportional to temperature.

4. The apparatus of claim 3 wherein the transducer sensing means is a temperature sensitive ceramic capacitor.

5. A temperature telemetry apparatus for reciprocating machinery comprising, a power generator means for connection to the reciprocating machinery and including, an elongate nonmagnetic tube having closed ends, a magnet movable in said tube in response to movement of the machinery, an electrical coil surrounding a portion of the tube for generating electrical power in response to movement of the magnet relative to the coil, a magnetic core, the ends of the tube to provide a low reluctance magnetic path between the ends of the tube;

a rectifier including a regulator and filter connected to the coil for receiving the power generated in the coil, an electrical transmitter having a tank circuit for transmitting electrical signals whose frequency is controlled by the tank circuit, and a temperature sensitive ceramic capacitor positioned adjacent the reciprocating machinery and electrically connected in the tank circuit thereby varying the transmitted signals in proportion to the temperature of the machinery.

6. The apparatus of claim 5 wherein, said generator, rectifier and transmitter are encapsulated in an epoxy package.

7. In combination with a repetitive moving apparatus of a telemetry measuring apparatus for measuring a property of the apparatus comprising, a magnetic power generator means having portions which when moved relative to each other generate a voltage, one portion being connected to the moving apparatus thereby generating a voLtage when the apparatus moves, a rectifier including a regulator and filter connected to the generator for receiving the generated voltage, an electrical transmitter connected to the rectifier and having a tank circuit for transmitting electrical signals whose frequency is controlled by the tank circuit, a temperature sensitive capacitor whose capacitance varies proportionally to temperature positioned adjacent the apparatus and electrically connected in the tank circuit thereby varying the transmitted signal in proportion to the temperature of the apparatus.

8. The apparatus of claim 7 wherein the power generator includes, a first and second member, one of which is fixed and the other of which moves relative to the fixed member, said first member being a circular toothed disc, said second member including two soft iron pieces having the pickup coil wound thereon and a permanent magnet positioned between the soft iron pieces whereby a voltage is generated in the coil when the coil moves relative to the toothed disc,

9. The apparatus of claim 7 where the power generator includes, a first and second member, one of which is connected to the moving apparatus and the other of which is fixed relative to the object, said first member being a U-shaped soft iron piece having a pickup coil wound thereon, and said second member being a permanent magnet movably positioned relative to the first member thereby generating a voltage in the coil when the apparatus moves.

10. The apparatus of claim 1 wherein the power generator includes, a first and second member, one of which is fixed and the other of which moves relative to the fixed member, said first member being a circular toothed disc, said second member including two soft iron pieces having the pickup coil wound thereon and a permanent magnet positioned between the soft iron pieces whereby a voltage is generated in the coil when the coil moves relative to the toothed disc.