Sensor system including multiple radio frequency identification tags

• US 20070252691A1
• Filed: 05/01/2006
• Published: 11/01/2007
• Est. Priority Date: 05/01/2006
• Status: Active Grant

• Current Assignee: Honeywell International Inc.
• Original Assignee: Honeywell International Inc.
• Inventors: Mirmobin, Parsa, Brackenbury, Andrew
• Granted Patent: US 7,636,031 B2
• Time in Patent Office: Days
• US Class Current: 340/539.220
• CPC Class Codes: H04B 5/0043 for taking measurements, e.g. using sensor coils
• CPC Class Codes: H04B 5/0062 in RFID [Radio Frequency Identification] Systems
• CPC Class Codes: H04B 5/02 using transceiver
• CPC Class Codes: H04B 5/48 Transceivers
• CPC Class Codes: H04B 5/73 for taking measurements, e.g. using sensing coils
• CPC Class Codes: H04B 5/77 for interrogation
• CPC Class Codes: H04Q 9/00 Arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station, in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom

Abstract

A sensor system includes a sensor circuit and a plurality (e.g., N-number) of radio frequency identification (RFID) tags. The sensor circuit senses a physical parameter and supplies N-bits of digital sensor data. Each of the RFID tags at least selectively receives a digital sensor signal representative of one of the N-bits of digital sensor data and selectively transmits the digital sensor signal it received.

Claims

1. A sensor system, comprising:

a sensor circuit operable to sense a parameter and supply N-bits of digital sensor data; and

N-number of radio frequency identification (RFID) tags, each RFID tag coupled to at least selectively receive a digital sensor signal representative of one of the N-bits of digital sensor data and operable to selectively transmit the digital sensor signal received thereby.

2. The sensor system of claim 1, wherein:

each RFID tag is configured to selectively transmit the digital sensor signal received thereby at an RF transmission frequency; and

the RF transmission frequency of each RFID tag differs from that of the other RFID tags.

3. The sensor system of claim 1, wherein:

each of the N-bits of digital sensor data is representative of either a logical 1 or a logical 0; and

each RFID tag selectively transmits the digital sensor signal received thereby only when the received digital sensor data is representative of a logical 1.

4. The sensor system of claim 1, wherein the sensor circuit comprises:

an analog sensor operable to sense a parameter and supply an analog sensor signal representative of the sensed parameter;

an analog-to-digital converter (ADC) having N-bits of resolution, the ADC coupled to receive the analog sensor signal and operable to convert the analog sensor signal to the N-bits of digital sensor data.

5. The sensor system of claim 1, further comprising:

memory in operable communication with the ADC and configured to selectively store the N-bits of digital sensor data.

6. The sensor system of claim 5, wherein each of the RFID tags is in operable communication with, and is configured to selectively receive the digital sensor signal selectively stored in, the memory.

7. The sensor system of claim 1, further comprising:

a communication control circuit in operable communication with, and configured to control operation of, the ADC.

8. The sensor system of claim 1, further comprising:

memory in operable communication with the sensor circuit and configured to selectively store the N-bits of digital sensor data; and

a communication control circuit in operable communication with the ADC and the memory, the communication control circuit operable to control operations of the ADC and the memory.

9. The sensor system of claim 1, further comprising:

an RFID reader operable to receive the digital sensor signal selectively transmitted from each of the RFID tags.

10. The sensor system of claim 9, wherein:

the RFID reader is further operable to selectively transmit an interrogation signal to each of the RFID tags; and

each of the RFID tags is responsive to the interrogation signal to transmit the received digital sensor signal.

11. The sensor system of claim 1, wherein each of the RFID tags is selected from the group consisting of a passive tag, a semi-passive tag, and an active tag.

12. A sensor system, comprising:

a sensor circuit operable to sense a parameter and supply N-bits of digital sensor data;

N-number of radio frequency identification (RFID) tags, each RFID tag configured to (i) selectively receive a digital sensor signal representative of one of the N-bits of digital sensor data and (ii) selectively transmit the digital sensor signal retrieved thereby; and

an RFID reader operable to receive the digital sensor signal selectively transmitted from each of the RFID tags.

13. The sensor system of claim 12, wherein:

each RFID tag is configured to selectively transmit the digital sensor signal received thereby at an RF transmission frequency; and

the RF transmission frequency of each RFID tag differs from that of the other RFID tags.

14. The sensor system of claim 12, wherein:

each of the N-bits of digital sensor data is representative of either a logical 1 or a logical 0; and

each RFID tag selectively transmits the sensor system data received thereby only when the received sensor system data is representative of a logical 1.

15. The sensor system of claim 12, wherein:

the RFID reader is further configured to selectively transmit an interrogation signal to each of the RFID tags; and

each RFID tag is configured to selectively receive and transmit the digital sensor signal in response to the interrogation signal transmitted thereto.

16. The sensor system of claim 12, wherein the sensor circuit comprises:

an analog sensor operable to sense a parameter and supply an analog sensor signal representative of the sensed parameter;

an analog-to-digital converter (ADC) having N-bits of resolution, the ADC coupled to receive the analog sensor signal and operable to convert the analog sensor signal to the N-bits of digital sensor data

17. The sensor system of claim 16, further comprising:

memory in operable communication with the ADC and configured to selectively store the N-bits of sensor system data; and

a communication control circuit in operable communication with the ADC and the memory, the communication control circuit operable to control operations of the ADC and the memory,

wherein each of the RFID tags is in operable communication with, and is configured to selectively receive the digital sensor signal selectively stored in, the memory.

18. The sensor system of claim 12, wherein each of the RFID tags is selected from the group consisting of a passive tag, a semi-passive tag, and an active tag.

19. A sensor system data collection and storage system, comprising:

a sensor circuit operable to sense a parameter and supply N-bits of digital sensor data;

N-number of radio frequency identification (RFID) tags, each RFID tag configured to (i) selectively receive a digital sensor signal representative of one of the N-bits of digital sensor data and (ii) selectively transmit the digital sensor signal retrieved thereby;

an RFID reader operable to receive the digital sensor signals selectively transmitted from each of the RFID tags, the RFID reader configured, upon receipt of the digital sensor signals, to (i) convert the digital sensor signals received from all of the RFID tags into an N-bit digital data packet representative of the sensed parameter and (ii) transmit the N-bit digital data packet; and

a computer in operable communication with the RFID reader, the computer configured to receive and at least store the N-bit digital data packet.

20. The sensor system of claim 19, wherein the sensor circuit comprises:

an analog sensor operable to sense a parameter and supply an analog sensor signal representative of the sensed parameter;

an analog-to-digital converter (ADC) having N-bits of resolution, the ADC coupled to receive the analog sensor signal and operable to convert the analog sensor signal to the N-bits of digital sensor data.