APPARATUS AND METHOD FOR CONTROLLING WATER QUALITY SENSOR FAULTS

• US 20140379302A1
• Filed: 04/08/2014
• Published: 12/25/2014
• Est. Priority Date: 06/20/2013
• Status: Abandoned Application

• Current Assignee: Electronics and Telecommunications Research Institute
• Original Assignee: Electronics and Telecommunications Research Institute
• Inventors: PARK, Hyeon
• Application Number:
  US14/247,716
• Publication Number:
  US 20140379302A1
• Time in Patent Office: Days
• US Class Current: 702/183
• CPC Class Codes: C02F 2103/007 Contaminated open waterways, rivers, lakes or ponds
• CPC Class Codes: C02F 2209/11 Turbidity
• CPC Class Codes: C02F 2303/14 Maintenance of water treatment installations
• CPC Class Codes: G05B 23/0221 Preprocessing measurements, e.g. data collection rate adjustment; Standardization of measurements; Time series or signal analysis, e.g. frequency analysis or wavelets; Trustworthiness of measurements; Indexes therefor; Measurements using easily measured parameters to estimate parameters difficult to measure; Virtual sensor creation; De-noising; Sensor fusion; Unconventional preprocessing inherently present in specific fault detection methods like PCA-based methods

Abstract

In a method for controlling water quality sensor faults by receiving sensing data reported from one or more water quality sensors in an apparatus for controlling water quality sensor faults, the method includes: detecting an outlier value in sensing data reported from the one or more water quality sensors; and in response to detection of an outlier value in the sensing data, determining whether a water quality sensor corresponding to the detected outlier value is faulty.

Claims

1. A method for controlling water quality sensor faults by receiving sensing data reported from one or more water quality sensors in an apparatus for controlling water quality sensor faults, the method comprising:

detecting an outlier value in sensing data reported from the one or more water quality sensors; and

in response to detection of an outlier value in the sensing data, determining whether a water quality sensor corresponding to the detected outlier value is faulty.

2. The method of claim 1, wherein the determining whether the water quality sensor corresponding to the detected outlier value is faulty comprises retrieving a database to determine whether the water quality sensor corresponding to the detected outlier value is already reported to be faulty.

3. The method of claim 2, wherein the determining whether the water quality sensor corresponding to the detected outlier value is faulty comprises, in response to retrieving in the database at least one fault among a water quality sensor interface fault, a water quality sensor main body fault, and a water quality sensor turbidity probe fault of the water quality sensor, determining that the water quality sensor is already faulty.

4. The method of claim 2, wherein the determining whether the water quality sensor corresponding to the detected outlier value is faulty comprises:

in response to the water quality sensor not yet being reported to be faulty, operating a cleaning device of the water quality sensor, and monitoring sensing data after a lapse of predetermined time; and

in response to monitoring no fault occurrence, determining that the water quality sensor has returned to a normal state.

5. The method of claim 4, wherein the determining whether the water quality sensor corresponding to the detected outlier value is faulty further comprises, in response to monitoring a fault occurrence, repeating operation of the cleaning device for a predetermined number of times.

6. The method of claim 5, wherein the determining whether the water quality sensor corresponding to the detected outlier value is faulty comprises managing an average operating period of the cleaning device.

7. The method of claim 6, wherein the determining whether the water quality sensor corresponding to the detected outlier value is faulty comprises, in response to monitoring a fault occurrence, using flow sensing data to determine that the water quality sensor is faulty.

8. The method of claim 7, wherein the determining whether the water quality sensor corresponding to the detected outlier value is faulty comprises, in response to no sudden changes in the flow sensing data, determining that the water quality sensor is faulty.

9. An apparatus for controlling water quality sensor faults, the apparatus comprising:

a water quality evaluator configured to detect an outlier value in sensing data reported from one or more water quality sensors; and

a sensor fault determiner, which in response to detection of an outlier value in the sensing data, is configured to determine whether a water quality sensor corresponding to the detected outlier value is faulty.

10. The apparatus of claim 9, wherein the sensor fault determiner comprises:

a database (DB) retriever configured to retrieve a database to determine whether the water quality sensor corresponding to the detected outlier value, is already reported to be faulty;

a cleaning device driver, which in response to the water quality sensor not yet being reported to be faulty, is configured to operate a cleaning device of the water quality sensor and to monitor sensing data after a lapse of predetermined time; and

a flow change determiner, which in response to monitoring a fault occurrence, is configured to use flow sensing data to determine that the water quality sensor is faulty.

11. The apparatus of claim 10, wherein the DB retriever comprises:

retrieving the database, and in response to retrieving at least one fault among a water quality sensor interface fault, a water quality sensor main body fault, and a water quality sensor turbidity probe fault of the water quality sensor, determining that the water quality sensor is already faulty.

12. The apparatus of claim 10, wherein the cleaning device driver is configured to repeat operation of the cleaning device for a predetermined number of times in response to the monitoring of a fault occurrence.

13. The apparatus of claim 10, wherein the cleaning device driver is configured to manage an average operating period of the cleaning device.

14. The apparatus of claim 10, wherein in response to no sudden changes in flow sensing data, the flow change determiner is configured to determine that the water quality sensor is faulty.