SENSOR ARRANGEMENT AND METHOD FOR USING SAME

• US 20080036590A1
• Filed: 08/08/2006
• Published: 02/14/2008
• Est. Priority Date: 08/08/2006
• Status: Active Grant

• Current Assignee: Ford Global Technologies, LLC (Ford Motor Company)
• Original Assignee: Ford Global Technologies, LLC (Ford Motor Company)
• Inventors: Elder, Ronald, Gonzales, Philip
• Granted Patent: US 7,651,267 B2
• Time in Patent Office: Days
• US Class Current: 340/539.27
• CPC Class Codes: G01K 1/024 for remote indication
• CPC Class Codes: G01K 2215/00 Details concerning sensor power supply
• CPC Class Codes: H04Q 2209/10 using a centralized architecture
• CPC Class Codes: H04Q 2209/30 using a wired architecture
• CPC Class Codes: H04Q 2209/40 using a wireless architecture
• 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 arrangement includes, in some embodiments, a magnetostrictive element configured to output magnetic signals in response to a magnetic field. A sensor is configured to sense a value of a property of a selected object, and to provide an electrical resistance that varies in response to variations in the sensed value. The sensor cooperates with the magnetostrictive element to vary the frequency of the signals output by the magnetostrictive element based on variations of the electrical resistance provided by the sensor. A transmitter provides an alternating magnetic field to the magnetostrictive element, and a receiver picks up the magnetic signals generated by the magnetostrictive element. The frequency of the signals received is correlated with the sensor resistance, and the resistance is correlated to a value of the property sensed.

Claims

1. A sensor arrangement for determining a value of at least one property of a selected object, the sensor arrangement comprising:

a magnetostrictive element configured to output magnetic signals in response to an alternating magnetic field; and

a first sensor configured to sense a value of a property of the selected object and to provide an electrical resistance that varies in response to variations in the sensed value, the first sensor cooperating with the magnetostrictive element to vary the frequency of the signals output by the magnetostrictive element based on variations of the electrical resistance provided by the first sensor.

2. The sensor arrangement of claim 1, further comprising:

a transmitter including an antenna, the transmitter being configured to generate and send an alternating magnetic field to the magnetostrictive element; and

a receiver for receiving the signals output by the magnetostrictive element.

3. The sensor arrangement of claim 2, further comprising a control module having the transmitter and receiver integrated therein.

4. The sensor arrangement of claim 3, the selected object being a battery in a vehicle, and wherein the control module includes a battery control module, and the first sensor includes a thermistor configured to sense a temperature of the battery.

5. The sensor arrangement of claim 4, the battery including a plurality of battery modules, the sensor arrangement further comprising:

a plurality of the magnetostrictive elements, each being associated with a respective one of the battery modules and configured to output magnetic signals in response to the magnetic field generated by the control module; and

a plurality of the first sensors, each of the first sensors being configured to sense the temperature of a respective one of the battery modules and to provide an electrical resistance that varies in response to variations in the sensed temperature, each of the first sensors cooperating with a respective one of the magnetostrictive elements to vary the frequency of the signals output by the respective magnetostrictive element based on variations of the electrical resistance provided by the respective first sensor.

6. The sensor arrangement of claim 5, further comprising a plurality of identification circuits, each of the identification circuits being operable to enable and disable a respective one of the first sensors to inhibit the effect of the first sensors on the signals output by the respective magnetostrictive element, each of the identification circuits cooperating with a respective one of the magnetostrictive elements to provide a different electrical resistance for each respective magnetostrictive element, thereby facilitating identification of each of the magnetostrictive elements.

7. The sensor arrangement of claim 6, further comprising a plurality of second sensors, each being configured to sense a value of a second property of a respective one of the battery modules, and to provide an electrical resistance based on the value it senses, each of the second sensors cooperating with a respective one of the magnetostrictive elements such that the frequency of the signals output by the respective magnetostrictive elements is affected by the electrical resistance provided by the respective second sensor.

8. The sensor arrangement of claim 7, wherein each of the identification circuits is further operable to enable and disable a respective one of the second sensors to inhibit the effect of the second sensors on the output signals of the respective magnetostrictive element, thereby allowing independent determination of the effect of a respective first sensor and the effect of a respective second sensor on the signals output by a respective one of the magnetostrictive elements.

9. The sensor arrangement of claim 8, wherein each of the second sensors includes a voltage sensor.

10. The sensor arrangement of claim 9, wherein each of the identification circuits is configured to disable respective first and second sensors when the vehicle is in a key-on condition, thereby allowing each of the battery modules to be identified, and thereafter, while the vehicle is operating, each of the identification circuits is configured to alternately:

enable a respective first sensor and disable a respective second sensor, and enable a respective second sensor and disable a respective first sensor, thereby allowing independent determination of the temperature and voltage of each of the battery modules.

11. A sensor arrangement for determining a value of at least one property of a selected object, the sensor arrangement comprising:

a passive transducer configured to output mechanical oscillations at a frequency in response to a magnetic field, the mechanical oscillations generating corresponding magnetic output signals; and

a first sensor configured to sense a value of a first property of the selected object and to provide an electrical resistance based on the sensed value, the first sensor cooperating with the transducer such that the frequency of the output signals generated by the transducer is at least in part dictated by the electrical resistance provided by the first sensor.

12. The sensor arrangement of claim 11, further comprising:

a transmitter for generating and sending a magnetic field to the transducer; and

a receiver for receiving the output signals generated by the transducer.

13. The sensor arrangement of claim 12, wherein the transmitter includes an antenna disposed proximate the selected object and configured to output the magnetic field to the selected object.

14. The sensor arrangement of claim 13, further comprising a control module having the transmitter and the receiver integrated therein.

15. The sensor arrangement of claim 14, wherein the antenna is further configured to receive the output signals generated by the transducer, thereby providing a single source for sending and receiving signals to and from the transducer.

16. The sensor arrangement of claim 15, wherein the transmitter generates and sends the magnetic field in pulses.

17. The sensor arrangement of claim 16, further comprising a second sensor configured to sense a value of a second property of the selected object and to provide an electrical resistance based on the value it senses, the second sensor cooperating with the transducer such that the frequency of the output signals generated by the transducer is affected by the electrical resistance provided by the second sensor.

18. A method for determining a value of at least one property of at least one selected object using a sensor arrangement including a passive transducer and a first sensor, the transducer being configured to output mechanical oscillations at a frequency in response to a magnetic field, the mechanical oscillations generating corresponding magnetic output signals, the first sensor being configured to sense a value of a first property of the selected object and to provide an electrical resistance based on the sensed value, the first sensor cooperating with the transducer such that the frequency of the output signals generated by the transducer is at least in part dictated by the electrical resistance provided by the first sensor, the method comprising:

sensing a value of a first property of the selected object;

sending a magnetic field to the transducer;

receiving the output signals generated by the transducer; and

determining the sensed value of the first property using the output signals received, including correlating the frequency of the output signals received with the resistance of the first sensor, and correlating the resistance of the first sensor with the sensed value.

19. The method of claim 18, the sensor arrangement further including a second sensor configured to sense a value of a second property of the selected object and to provide an electrical resistance based on the value it senses, the second sensor cooperating with the transducer such that the frequency of the output signals generated by the transducer is affected by the electrical resistance provided by the second sensor, the method further comprising:

disabling operation of one of the sensors; and

enabling operation of the other sensor, thereby allowing determination of the value sensed by the enabled sensor independently from the disabled sensor.

20. The method of claim 19, the sensor arrangement further including a plurality of the passive transducers, and a plurality of the first and second sensors, each of the transducers being associated with:

a different selected object, one of the first sensors, and one of the second sensors, the sensor arrangement further including a plurality of identification circuits, each of the identification circuits cooperating with a respective one of the transducers to provide a different electrical resistance for each respective transducer, thereby facilitating identification of each of the transducers, the method further comprising;

disabling all of the first and second sensors;

sending a magnetic field to the transducers;

receiving the output signals generated by the transducers; and

determining an identification for each of the transducers using the output signals received, including correlating the frequencies of the output signals received with the resistance of a respective identification circuit.

21. The method of claim 20, further comprising:

enabling each of the first sensors and disabling each of the second sensors;

sending a magnetic field to the transducers;

receiving the output signals generated by the transducers;

determining the sensed values of the first property of each of the selected objects using the output signals received, including correlating the frequency of the output signals received with the resistances of the first sensors, and correlating the resistances of the first sensors with the sensed values;

enabling each of the second sensors and disabling each of the first sensors;

sending a magnetic field to the transducers;

receiving the output signals generated by the transducers; and

determining the sensed values of the second property of each of the selected objects using the output signals received, including correlating the frequency of the output signals received with the resistances of the second sensors, and correlating the resistances of the second sensors with the sensed values.