Wireless tracking system for personal items
First Claim
1. A radio frequency transmission device comprising:
- an electronic circuitry including a digital logic circuit and a radio transmission circuit;
the digital logic circuit having a sleep mode of operation and an active mode of operation, the digital logic circuit alternate-able from the sleep mode to the active mode after a pre-determined time period;
a digital signal generated by the digital logic circuit during the active mode of operation, the digital signal routed to the radio transmission circuit, the radio transmission circuit for transmitting a radio signal in a specific frequency range;
the digital signal including a unique and predetermined sequence of fixed length pulses; and
the electronic circuitry alternate-able into the sleep mode of operation immediately after transmission of the digital signal.
1 Assignment
0 Petitions
Accused Products
Abstract
A radio frequency transmission device including electronic circuitry. A digital logic circuit is alternate-able from a sleep mode to an active mode after a pre-determined time period, and back to the sleep mode immediately after transmission of a digital signal. The digital signal includes a unique and pre-determined sequence of fixed length pulses routed to a transmission circuit to transmit a radio signal in a specific frequency range. An output display signal from the output circuitry is displayed with an LED. An input circuitry is manually activated. A radio frequency signal is received with a receiver circuitry, sensed to determine if the received signal has a compatible characteristic of an expected signal. The radio frequency signal is converted into a digital form and sent to the microprocessor. Every associated transmitter device is tracked with a counter maintained by a microprocessor. Personnel, belongings and pets can be tracked with this device.
48 Citations
18 Claims
-
1. A radio frequency transmission device comprising:
-
an electronic circuitry including a digital logic circuit and a radio transmission circuit;
the digital logic circuit having a sleep mode of operation and an active mode of operation, the digital logic circuit alternate-able from the sleep mode to the active mode after a pre-determined time period;
a digital signal generated by the digital logic circuit during the active mode of operation, the digital signal routed to the radio transmission circuit, the radio transmission circuit for transmitting a radio signal in a specific frequency range;
the digital signal including a unique and predetermined sequence of fixed length pulses; and
the electronic circuitry alternate-able into the sleep mode of operation immediately after transmission of the digital signal. - View Dependent Claims (2, 3, 4)
-
-
5. A radio frequency receiving device comprising:
-
an electronic circuitry including a microprocessor, a memory unit, a button, an LED, a speaker device, and a radio frequency receiver circuitry;
the memory unit comprised of a DRAM, the DRAM for storing an instruction to direct an action of the microprocessor;
the button depressible to manually activate an input circuitry, the input circuitry for sending input signals to the microprocessor;
the microprocessor having an output circuitry;
the LED for displaying an output display signal from the output circuitry;
the electronic circuitry having an internal state, the internal state including a sleep mode, an active mode and an alarm mode;
the radio frequency receiver circuitry for receiving a radio signal;
the radio frequency receiver circuitry for sensing and determining if the radio signal has a compatible characteristic of an expected signal;
the radio frequency receiver circuitry for converting the radio frequency signal into a digital form;
the radio frequency receiver circuitry for sending the digital form to the microprocessor unit;
a counter maintained by the microprocessor unit, the counter for tracking the cumulative number of the digital form received by the radio frequency receiver circuitry;
an incremental advancement of a counter by the microprocessor;
a check by the microprocessor of the counter to determine if the counter is above an upper count limit of the counter, the upper count limit fixed and pre-determined for the radio receiver device; and
an alarm state entered into by the microprocessor if the microprocessor determines in the check of the counter that the counter of the tracked radio transmitter devices is above the upper count limit. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12)
-
-
13. A method of a radio frequency receiving device comprising the steps of:
-
a) providing an electronic circuitry, the electronic circuitry including a microprocessor having an output circuitry, a memory unit comprised of a DRAM, a button, an LED, a speaker device, and a radio frequency receiver circuitry;
b) powering the electronic circuitry by a battery, the electronic circuitry having a sleep mode and an active mode;
c) displaying an output display signal from the output circuitry with the LED;
d) manually activating an input circuitry with the button;
e) sending an input signal to the microprocessor with the input circuitry;
f) receiving a radio frequency signal with the radio frequency receiver circuitry;
g) sensing and determining with the radio frequency receiver circuitry if the radio signal has a compatible characteristic of an expected signal;
h) converting the radio frequency signal into a digital form with the radio frequency receiver circuitry;
i) sending the digital form to the microprocessor unit of the radio frequency receiver circuitry;
j) tracking every RF transmitter device that the radio frequency receiving device is tracking with a counter, the counter maintained by the microprocessor unit;
k) advancing incrementally a counter by the microprocessor;
l) checking with the microprocessor to determine if the counter is above an upper count limit of the counter, the upper count limit fixed and pre-determined for the radio receiver device; and
m) entering an alarm state by the microprocessor if the microprocessor determines in the check of the counter that the counter of the tracked radio transmitter devices is above the upper count limit. - View Dependent Claims (14, 15, 16, 17, 18)
-
Specification