Gas sensing device

Patent metadata

Field	Value
Publication number	US-10416104-B2
Application number	US-201515323051-A
Country	US
Kind code	B2
Filing date	Jul 7, 2015
Priority date	Jul 11, 2014
Publication date	Sep 17, 2019
Grant date	Sep 17, 2019

Abstract

The present invention relates to a gas sensing device comprising: a gas sensing part for outputting a gas detection result; and a correction control part for changing the value outputted from the gas sensing part to a reference value when the output value is lower than the reference value.

First claim

The invention claimed is:

1. A gas sensing device comprising:
a gas sensing part configured to sense for gas and output an output voltage based on the sensed gas; and
a control part that receives the output voltage from the gas sensing part and configured to output a result value based on the output voltage,
wherein the control part compares the output voltage to a reference voltage, and
when the control part determines that the output voltage from the gas sensing part is less than the reference voltage, the control part changes a display of the result value by providing the reference voltage as the result value, and
when the control part determines that the output voltage from the gas sensing part is greater than or equal to the reference voltage, the control part controls the display to output the output voltage received from the gas sensing part as the result value.

2. The gas sensing device according to claim 1 , wherein when the control part determines that the output voltage from the gas sensing part is less than the reference voltage, the control part constantly changes the display by constantly changing the result value from the output voltage to the reference voltage.

3. The gas sensing device according to claim 1 , further comprising a display for displaying gas detection information,
wherein when the control part determines that the output voltage from the gas sensing part is less than the reference voltage, the control part controls the display to display the result value based on the reference voltage.

4. The gas sensing device according to claim 3 , wherein when the control part determines that the output voltage from the gas sensing part is greater than or equal to the reference voltage, the control part controls the display to display the result value based on the output voltage from the gas sensing part.

5. The gas sensing device according to claim 3 , wherein the display provides additional information corresponding to the displayed result value.

6. The gas sensing device according to claim 5 , wherein the additional information is image information.

7. The gas sensing device according to claim 6 , wherein
when the result value is the reference voltage, the additional information indicates that gas is not present,
when the result value is between the reference voltage and a first prescribed voltage, the additional information indicates that gas is present within an acceptable level, and
when the result value is greater than the first prescribed voltage, the additional information indicates a warning for presence of gas.

8. The gas sensing device according to claim 7 , wherein the first prescribed voltage is 1.0 V.

9. The gas sensing device according to claim 5 , further comprising a speaker for providing sound information corresponding to the displayed result value.

10. The gas sensing device according to claim 1 , wherein the reference voltage corresponds to an output voltage level of the gas sensing part associated with a state in which gas is not detected.

11. The gas sensing device according to claim 1 , wherein the gas sensing part is affected by humidity and temperature such that the output voltage has a prescribed error value.

12. The gas sensing device according to claim 11 , wherein the reference voltage is greater than the prescribed error value.

13. The gas sensing device according to claim 12 , wherein the prescribed error value is −0.1 V to +0.1 V and the reference voltage is 0.5 V.

14. A gas sensing device comprising:
a gas sensing part configured to sense for presence of gas and output an output voltage based on sensed concentration of gas;
a control part that receives the output voltage from the gas sensing part and configured to output a result value based on the output voltage; and
a display configured to display gas detection information including the result value,
wherein the control part compares the output voltage to a reference voltage, and
when the control part determines that the output voltage from the gas sensing part is less than the reference voltage, the control part changes the display of the result value by displaying the reference voltage as the result value, and
when the control part determines that the output voltage from the gas sensing part is greater than or equal to the reference voltage, the control part controls the display to display the output voltage received from the gas sensing part as the result value,

wherein the gas sensing part is affected by humidity and temperature such that the output voltage has a prescribed error value, and
wherein the reference voltage is greater than the prescribed error value.

Assignees

• Lg Innotek Co Ltd

Inventors

• Jun Sung Gon

Classifications

• G08B29/24

  Self-calibration, e.g. compensating for environmental drift or ageing of components · CPC title

• G08B29/185

  Signal analysis techniques for reducing or preventing false alarms or for enhancing the reliability of the system · CPC title

• G08B21/12 Primary

  responsive to undesired emission of substances, e.g. pollution alarms · CPC title

• G01N33/0006

  Calibrating gas analysers · CPC title

• G01N27/04 Primary

  by investigating resistance · CPC title