Sensor system

• US 9,341,499 B2
• Filed: 05/17/2011
• Issued: 05/17/2016
• Est. Priority Date: 06/04/2010
• Status: Active Grant

• Current Assignee: Sensirion AG (Sensirion Holding AG)
• Original Assignee: Sensirion AG (Sensirion Holding AG)
• Inventors: Hess, Vincent, Graf, Markus, Niederberger, Dominik
• Primary Examiner(s): Toatley, Gregory J
• Assistant Examiner(s): Zhang, Ruihua
• Application Number:
  US13/068,628
• Publication Number:
  US 20110307208A1
• Time in Patent Office: 1,827 Days
• Field of Search: 702/99, 702/104, 165222-225
• US Class Current: 1/1
• CPC Class Codes: G01D 18/008 with calibration coefficients stored in memory
• CPC Class Codes: G01D 3/0365 the undesired influence being measured using a separate sensor, which produces an influence related signal

Abstract

Disclosed is a method for adjusting a sensor signal and a corresponding sensor system comprising a sensor for providing a sensor signal representative of a measure other than temperature, dynamic components of the sensor signal being dependent on temperature. In addition there is provided a temperature sensor for measuring the temperature. Dynamic components in the sensor signal are adjusted subject to the temperature sensed, and a compensated sensor signal is supplied. Such sensor system helps compensating for long response times of sensors.

Claims

1. A sensor system, comprising

a sensor providing a sensor signal representative of a measure other than temperature, dynamic components of the sensor signal being dependent on temperature,

a temperature sensor for providing a temperature signal,

a compensation filter receiving the sensor signal and the temperature signal, wherein the compensation filter is designed for adjusting the dynamic components in the sensor signal subject to the temperature signal, and for providing a compensated sensor signal, wherein the compensation filter comprises multiple different compensation models, wherein each of said compensation models is provided in a spectral domain and is associated to a temperature sub-range, and wherein each compensation model itself is invariant to changes in temperature.

2. A sensor system according to claim 1, wherein the compensation filter comprises a temperature continuous compensation model.

3. A sensor system according to claim 1, wherein the compensation filter is designed for determining a sub-range where the temperature signal falls within, and for applying the compensation model associated with the determined sub-range.

4. A sensor system according to claim 1, wherein the sensor is a humidity sensor.

5. A sensor system according to claim 4, wherein the humidity sensor and the temperature sensor are arranged on a pane of a vehicle for detecting fogging of the pane.

6. A method for adjusting a sensor signal, comprising the steps of:

(a) sensing a temperature,

(b) providing a sensor signal representative of a measure other than temperature, dynamic components of the sensor signal being dependent on temperature, and

(c) by a computing device configured for doing so,

(i) adjusting the dynamic components in the sensor signal subject to the temperature sensed, and

(ii) providing a compensated sensor signal,

wherein the dynamic components in the sensor signal are adjusted by applying multiple different compensation models, wherein each of said compensation models is provided in a spectral domain and is associated to a temperature sub-range, wherein each compensation model itself is invariant to changes in temperature, and wherein said steps are executed on a sensor system according to claim 1.

7. A method according to claim 6, wherein the dynamic components in the sensor signal are adjusted by applying a temperature continuous compensation model.

8. A method according to claim 6, wherein a temperature sub-range is determined where the sensed temperature falls within, and wherein the compensation model associated with the determined temperature sub-range is applied to the sensor signal.

9. A method according to claim 6, wherein the sensor signal represents measured humidity, and wherein the compensated sensor signal is used in an antifogging application in a vehicle.