Apparatuses, methods and systems relating to findable golf balls

• US 8,002,645 B2
• Filed: 10/31/2005
• Issued: 08/23/2011
• Est. Priority Date: 01/17/2003
• Status: Active Grant

• Current Assignee: Topgolf International Inc. (Topgolf Callaway Brands Corp.)
• Original Assignee: Radar Corporation
• Inventors: Glissman, John, Shea, Mark A., Vickers, Marvin L., Fulton, Forrest F., Cadorniga, Lauro C., Scheller, James C. Jr., Savarese, Chris, Marshall, Noel H. C., McGill, Susan, Gilliland, Kenneth P.
• Primary Examiner(s): Lewis; David L
• Assistant Examiner(s): MCCULLOCH JR, WILLIAM H
• Application Number:
  US11/264,177
• Publication Number:
  US 20060128503A1
• Time in Patent Office: 2,122 Days
• Field of Search: 473/155, 473/353, 473/409
• US Class Current: 473/353
• CPC Class Codes: A63B 2024/0053 for locating an object, e.g. a lost ball
• CPC Class Codes: A63B 2225/50 Wireless data transmission, e.g. by radio transmitters or telemetry
• CPC Class Codes: A63B 24/0021 Tracking a path or terminating locations
• CPC Class Codes: A63B 37/0003 Golf balls
• CPC Class Codes: A63B 37/0055 with non-spherical insert(s)
• CPC Class Codes: A63B 37/0064 Diameter
• CPC Class Codes: A63B 37/0088 Frequency
• CPC Class Codes: A63B 43/00 Balls with special arrangements

Abstract

Golf ball locators and components of such locators and methods of operating such locators and processing signals within such locators. In one aspect of the inventions described herein, an exemplary method of initializing a golf ball locator includes receiving received RF signals while also transmitting signals used to locate balls and determining a parameter representative of received signal strength of the received RF signals and setting a threshold to determine when subsequent received signals are to cause an indication of golf ball detection. In another aspect of this disclosure, the golf ball locator is a handheld unit having a volume of less than about 150 inches cubed and includes a transmitter, a transmit antenna, a receiver, a receive antenna and a processor coupled to the transmitter and to the receiver, and the handheld unit achieves a signal isolation, between a second harmonic of a transmitted signal from the transmitter and the receiver'"'"'s received signal, of greater than about 130 to 160 dB. Other aspects are also described.

Claims

1. A method of locating a golf ball with a handheld golf ball detector having a transmitter and a receiver, the method comprising:

modulating a carrier to provide a binary phase shift keyed (BPSK) modulated signal, the modulation comprising a pseudorandom binary sequence (PN) modulated on the carrier;

shielding the receiver from the transmitter;

transmitting with the transmitter the BPSK modulated signal in transmitted pulses to locate a golf ball having an RF (radio frequency) circuit;

receiving with the receiver a received signal from the golf ball, wherein the received signal is a harmonic of the transmitted pulses and wherein the received signal was despread by the golf ball'"'"'s RF circuit.

2. A method as in claim 1 wherein the harmonic is a 2 times harmonic and wherein a single crystal is used to generate a reference frequency for both the transmitting and the receiving.

3. A handheld locator comprising:

a housing;

a modulator, within the housing and coupled to the signal source, the modulator to modulate a pseudorandom binary sequence (PN) on the signal source using binary phase shift keying (BPSK) modulation to produce a BPSK modulated signal;

a transmitter coupled to the modulator to transmit the BPSK modulated signal in transmitted pulses to locate an object having an RF (radio frequency) circuit, the transmitter being within the housing;

a receiver within the housing, the receiver to receive, as a received signal, a harmonic of the transmitted pulses, wherein the receiver is shielded from the transmitter and wherein the received signal was despread by the object'"'"'s RF circuit.

4. A handheld locator as in claim 3 further comprising:

a frequency source coupled to the transmitter and to the receiver, the frequency source generating the signal source for the modulator and generating a reference frequency for use by the receiver, and wherein the harmonic is a 2 times harmonic.