SYSTEMS AND METHODS FOR CALIBRATING VEHICLE SENSING DEVICES

• US 20180319250A1
• Filed: 05/05/2017
• Published: 11/08/2018
• Est. Priority Date: 05/05/2017
• Status: Active Grant

• Current Assignee: Ford Global Technologies, LLC (Ford Motor Company)
• Original Assignee: Ford Global Technologies, LLC (Ford Motor Company)
• Inventors: McQuillen, Michael, Makled, Daniel A., Surnilla, Gopichandra, Soltis, Richard E., Swaminathan, Radhakrishnan
• Granted Patent: US 10,583,710 B2
• Time in Patent Office: Days
• CPC Class Codes: B60H 1/00785 by the detection of humidity or frost
• CPC Class Codes: B60H 1/00828 Ventilators, e.g. speed control B60H1/00864 takes precedence
• CPC Class Codes: B60H 1/00978 Control systems or circuits characterised by failure of detection or safety means; Diagnostic methods
• CPC Class Codes: B60H 1/12 using an air blower
• CPC Class Codes: B60Y 2200/92 Hybrid vehicles
• CPC Class Codes: G01N 27/223 for determining moisture content, e.g. humidity rain detectors on vehicle windows B60S1/0825
• CPC Class Codes: G01N 33/0006 Calibrating gas analysers

Abstract

Methods and systems are provided for improving operation of a vehicle heating, ventilation, and air conditioning system. In one example, a method may include calibrating a vehicle humidity sensor position inside a cabin of the vehicle by obtaining one or more humidity measurements with one or more personal computing devices positioned inside the cabin, and may further include adjusting operation of the heating, ventilation, and air conditioning system responsive to the calibration. In this way, an interior humidity sensor of a vehicle may be regularly calibrated, which may improve operation of the vehicle heating, ventilation, and air conditioning system, and may further increase fuel economy.

Claims

1. A method comprising:

calibrating a first vehicle humidity sensor positioned inside a cabin of a vehicle via obtaining one or more humidity measurements with one or more personal computing devices positioned inside the cabin; and

adjusting a vehicle heating, ventilation, and air conditioning system responsive to calibrating the first vehicle humidity sensor.

2. The method of claim 1, wherein the one or more personal computing devices include a second humidity sensor.

3. The method of claim 1, wherein the one or more personal computing devices comprises a cellular phone.

4. The method of claim 1, wherein obtaining the one or more humidity measurements with the one or more personal computing devices further comprises positioning the one or more personal computing devices within a threshold distance from the first humidity sensor prior to obtaining the one or more humidity measurements.

5. The method of claim 4, wherein positioning the one or more personal computing devices within the threshold distance from the first humidity sensor includes using one or more cameras included in the one or more personal computing devices to direct the one or more personal computing devices to within the threshold distance.

6. The method of claim 1, wherein the one or more personal computing devices are equipped with a software application, the software application including instructions pertaining to how to obtain the one or more humidity measurements.

7. The method of claim 1, wherein the first vehicle humidity sensor is one of a dielectric or capacitive humidity sensor.

8. The method of claim 1, wherein the one or more humidity measurements obtained with the one or more personal computing devices are communicated wirelessly to a controller of the vehicle.

9. The method of claim 1, wherein the one or more humidity measurements obtained with the one or more personal computing devices are communicated via wired communication to a controller of the vehicle.

10. The method of claim 1, wherein calibrating the first vehicle humidity sensor includes correcting a gain or offset error of the first vehicle humidity sensor.

11. The method of claim 1, wherein adjusting the heating, ventilation, and air conditioning system includes one or more of adjusting temperature blending in the cabin of the vehicle, adjusting a force or speed of one or more fan(s) configured to direct heated or cooled air to the cabin of the vehicle, adjusting operation of a clutch configured to regulate a compressor of an air conditioning system, and/or adjusting a heater shut-off valve to regulate a coolant flow to a heater core.

12. The method of claim 1, wherein obtaining one or more humidity measurements includes increasing a confidence level associated with the one or more humidity measurements in responsive to more than one humidity measurement being obtained via more than one personal computing device.

13. A system for a vehicle, comprising:

an interior vehicle humidity sensor positioned in a cabin of the vehicle;

a vehicle climate control system; and

a controller storing instructions in non-transitory memory that, when executed, cause the controller to;

indicate a first humidity measurement obtained via the interior vehicle humidity sensor;

receive a second humidity measurement from a personal computing device positioned inside the cabin of the vehicle within a predetermined threshold of the interior vehicle humidity sensor;

calibrate the interior vehicle humidity sensor as a function of the first humidity measurement and the second humidity measurement; and

adjust one or more parameters of the vehicle climate control system in response to the calibrating of the interior vehicle humidity sensor.

14. The system of claim 13, wherein the controller stores further instructions in non-transitory memory that, when executed, cause the controller to:

correct a gain or offset error of the interior vehicle humidity sensor based on the indicated first humidity measurement and the received second humidity measurement to calibrate the interior vehicle humidity sensor.

15. The system of claim 13, wherein the vehicle climate control system further comprises:

one or more fans configured to direct heated or cooled air to the cabin of the vehicle; and

further comprising additional instructions in the non-transitory memory that, when executed, cause the controller to;

adjust one or more parameters of the vehicle climate control system including adjusting a force or speed of the one or more fans responsive to calibrating the interior vehicle humidity sensor.

16. The system of claim 13, wherein the vehicle climate control system further comprises:

a clutch configured to regulate an air conditioning compressor; and

further comprising additional instructions in the non-transitory memory that, when executed, cause the controller to;

adjust operation of the clutch to regulate the air conditioning compressor responsive to calibrating the interior vehicle humidity sensor.

17. The system of claim 13, wherein the vehicle climate control system further comprises:

a heater shut-off valve configured to regulate a coolant flow to a heater core of the vehicle; and

further comprising additional instructions in the non-transitory memory that, when executed, cause the controller to;

adjust the heater shut-off valve responsive to calibrating the interior vehicle humidity sensor.

18. A method for a vehicle, comprising:

sending a request for a first humidity measurement from a controller of a vehicle to a personal computing device, the personal computing device equipped with a personal computing device humidity sensor;

indicating when the personal computing device is within a threshold of an interior vehicle humidity sensor;

receiving the first humidity measurement from the personal computing device in response to an indication that the personal computing device is within the threshold of the interior vehicle humidity sensor;

indicating a second humidity measurement obtained from the interior vehicle humidity sensor; and

correcting a gain or offset error of the interior vehicle humidity sensor based on a difference between the first humidity measurement from the personal computing device and the second humidity measurement obtained from the interior vehicle humidity sensor.

19. The method of claim 18, further comprising:

in response to the correcting the gain or offset error of the interior vehicle humidity sensor, adjusting operation of a vehicle heating, ventilation, and air conditioning system.

20. The method of claim 19, wherein adjusting operation of the vehicle heating, ventilation, and air conditioning system further comprises:

adjusting temperature blending in the cabin of the vehicle, adjusting a force or speed of one or more fan(s) configured to direct heated or cooled air to the cabin of the vehicle, adjusting operation of a clutch configured to regulate a compressor of an air conditioning system, and/or adjusting a heater shut-off valve to regulate a coolant flow to a heater core.