Programmable electronic antenna rotator

• US 4,803,412 A
• Filed: 06/30/1987
• Issued: 02/07/1989
• Est. Priority Date: 06/30/1987
• Status: Expired due to Fees

• Current Assignee: Avnet Incorporated
• Original Assignee: Avnet Incorporated
• Inventors: Burton, Larry W.
• Primary Examiner(s): Shoop, Jr., William M.
• Assistant Examiner(s): Bergmann, Saul M.
• Application Number:
  US07/068,634
• Time in Patent Office: 588 Days
• Field of Search: 318/567, 318/600, 318/565, 318/664
• US Class Current: 318/567
• CPC Class Codes: G05B 19/4142 characterised by the use of a microprocessor G05B19/4141 takes precedence
• CPC Class Codes: G05B 19/42 Recording and playback systems, i.e. in which the programme is recorded from a cycle of operations, e.g. the cycle of operations being manually controlled, after which this record is played back on the same machine
• CPC Class Codes: G05B 2219/36401 Record play back, teach position and record it then play back
• CPC Class Codes: G05B 2219/37092 Display position actual and or target
• CPC Class Codes: G05B 2219/45001 Antenna orientation

Abstract

A method and apparatus for rotating an antenna, including a keypad is used to first program a controller for storing a plurality of individually selectable positions for the antenna, a particular key of the keypad representing a programmed position for the antenna, whereafter programming the keys of the keypad are individually depressed for commanding the controller to operate a motor driven rotator for moving the antenna in a clockwise or counterclockwise direction to the position associated with the momentarily depressed key. Also, visual indicators are arranged in a compass configuration for indicating the positioning of the antenna as it rotates, and selectively indicating the rest position of the antenna.

Claims

1. In a system for automatically rotating an antenna to any one of a plurality of preprogrammed positions via operation of either different ones or combinations of keys of a keypad, the preprogramming method for said system comprising the steps of:

(A) synchronizing said system to a datum position via rotation of said antenna to a known reference position;

(B) manually operating said system via said keypad for rotating said antenna to stop at a desired position;

(C) storing in memory via operating of said keypad the desired position of said antenna for subsequent automatic selection;

(D) repeating steps (B) and (C) for storing in memory each one of said plurality of preprogrammed positions;

(E) selecting from memory via said keypad one of said preprogrammed positions;

(F) automatically rotating said antenna to the selected preprogrammed position under control of said microprocessor; and

(G) detecting a signal from a remote control device for manually operating said system to rotate said antenna to a desired position.

2. The method of claim 1, further including the step of:

indicating remotely the changing positions of said antenna during its rotation from one position to another.

3. The method of claim 1, wherein said detecting step includes detecting an infrared signal.

4. A system for automatically or manually controlling the rotation of an antenna from one position to a desired new position, comprising:

a motor for rotating an antenna;

means for energizing said motor;

keypad means including a plurality of keys encoded for individually permitting either (1) selection of manual energization of said motor to rotate said antenna from one position to another, or (2) selection of a preprogrammed position for automatically rotating said antenna to the preprogrammed position, or (3) preprogramming of at least one position to which said antenna is "manually" moved, for obtaining subsequent automatic selection of the position; and

controller means including memory means for storing said preprogrammed position, said controller means being responsive to (1) continuous depression of either a "CW" or "CCW" encoded key of said keypad means for operating said energizing means to energize said motor for rotating said antenna in either a clockwise or counterclockwise direction to a desired position, respectively, (2) to momentary depression of a memory ended key subsequent to stopping said antenna at the desired position, for priming said keypad means to next permit momentary depression of a position key for storing the coordinates of the desired position in said memory means, and uniquely designating said last depressed position key to represent the now preprogrammed position, and (3) to subsequent momentary depression of any one of the previously preprogrammed position keys for automatically operating said motor energization means to rotate said antenna to the preprogrammed position, respectively; and

indicator means of remotely either (1) providing a visual indication of the position of said antenna as it is being rotated from one position to another, or (2) being responsive to depression of a "display" key on said keypad means for momentarily indicating the rest position of said antenna at that time.

5. The antenna rotator system of claim 4, wherein said motor includes:

a first pair of series connected windings;

a second pair of series connected windings; and

a capacitor connected in series with said second pair of windings, the combination of said second pair of windings and said capacitor being connected in parallel with said first pair of windings, said capacitor causing an approximately 90°

phase shift between a voltage applied across said first and second pairs of windings via said energizing means.

6. The antenna rotator system of claim 5, wherein said energizing means includes:

a source of reference potential;

a source of AC voltage connected between the common ends of said first and second pairs of windings, and said source of reference potential;

first switching means responsive to signals from said controller means for connecting the other end of said first pair of windings and said source of reference potential for rotating antenna in one direction; and

second switching means responsive to other signals from said controller means for connecting the other end of said second pair of windings to said source of reference potential, for rotating said antenna in an opposite direction.

7. The antenna rotator system of claim 6, wherein said first switching means includes:

a triac having a main current path connected between the common connection of said capacitor and first pair of windings, and said source of reference potential, and a gate electrode; and

processing means for processing said signals from said controller means, for developing a control signal for application to the gate electrode of said triac, for turning the triac on to substantially reduce the impedance of its main current path.

8. The antenna rotator system of claim 6, wherein said second switching means includes:

a triac having a main current path connected between the common connection of said capacitor and second pair of windings, and said source of reference potential, and a gate electrode; and

processing means for processing said signals from said controller means, for developing a control signal for application to the gate electrode of said triac, for turning the triac on to substantially reduce the impedance of its main current path.

9. The antenna rotator system of claim 4, wherein said keypad means includes a plurality of individual switches connected into a switching matrix, each switch being associated with an individual one of said plurality of keys, respectively.

10. The antenna rotator system of claim 9, wherein each one of said plurality of switches is operable via depression of its associated key for indicating a given row and column of said switching matrix to said controller means.

11. The antenna rotator system of claim 4, wherein said controller means includes a microprocessor.