Method and apparatus for collecting temperature of heating pipeline

Patent metadata

Field	Value
Publication number	US-11460352-B2
Application number	US-201716475315-A
Country	US
Kind code	B2
Filing date	Oct 30, 2017
Priority date	Dec 29, 2016
Publication date	Oct 4, 2022
Grant date	Oct 4, 2022

Abstract

The present invention discloses is a method for collecting a temperature of a heating pipeline, the method comprising: collecting a circuit signal of a heating resistor; calculating a current resistance value of the heating resistor according to the circuit signal; and calculating a current temperature of the heating pipeline according to the current resistance value. By using the method for collecting the temperature of the heating pipeline, measurement of the temperature of the heating pipeline can be realized by directly measuring the resistance value of the heating resistor in the heating pipeline, which may avoid the use of an additional temperature sensor, thereby reducing the number of connecting wires or other accessories.

First claim

What is claimed is:

1. A method for collecting a temperature of a heating pipeline, comprising:
collecting a circuit signal of a heating resistor during a measurement time period;
calculating a current resistance value of the heating resistor according to the circuit signal; and
calculating a current temperature of the heating pipeline according to the current resistance value;
wherein before the step of collecting a circuit signal of a heating resistor during a measurement time period, the method further comprises:
measuring and determining an initial temperature value of the heating pipeline and an initial resistance value of the heating resistor;
after the step of determining the initial temperature value of the heating pipeline and the initial resistance value of the heating resistor, the method further comprises a detection step, the detection step comprising:
calculating a detection temperature of the heating pipeline;
calculating a differential value between the detection temperature and an ambient temperature;
continuing to determine the ambient temperature as the initial temperature value and determine the detection resistance value of the heating resistor when the measurement current passes through as the initial resistance value when the differential value is within a preset temperature differential range; and
sending prompt information when the differential value exceeds the preset temperature differential range.

2. The method according to claim 1 , wherein when neither the initial temperature value of the heating pipeline nor the initial resistance value of the heating resistor is searched out, the method further comprises:
generating the initial temperature value of the heating pipeline and the initial resistance value of the heating resistor.

3. The method according to claim 2 , wherein the step of generating the initial temperature value of the heating pipeline and the initial resistance value of the heating resistor comprises:
controlling a power supply to output a measurement current before the heating pipeline starts heating;
obtaining an ambient temperature and a resistance value of the heating resistor when the measurement current passes through; and
determining the ambient temperature as the initial temperature value and the resistance value of the heating resistor as the initial resistance value.

4. The method according to claim 3 , wherein after the step of determining the initial temperature value of the heating pipeline and the initial resistance value of the heating resistor, the method further comprises a detection step, the detection step comprising:
collecting a detection circuit signal of the heating resistor;
calculating a detection resistance value of the heating resistor according to the detection circuit signal;
calculating a detection temperature of the heating pipeline according to the detection resistance value;
calculating a differential value between the detection temperature and the ambient temperature;
continuing to determine the ambient temperature as the initial temperature value and determine the detection resistance value of the heating resistor when the measurement current passes through as the initial resistance value when the differential value is within a preset temperature differential range; and
sending prompt information when the differential value exceeds the preset temperature differential range.

5. The method according to claim 1 , wherein, the step of calculating a detection temperature of the heating pipeline comprises:
collecting a detection temperature of the heating pipeline comprises:
calculating a detection resistance value of the heating resistor according to the detection circuit signal;
calculating a detection temperature of the heating pipeline according to the detection resistance value.

6. The method according to claim 1 , wherein before the step of collecting a circuit signal of a heating resistor during a measurement time period, the method further comprises:
controlling a power supply to output a drive current to pass through the heating resistor, so as to heat the heating pipeline; and
controlling the power supply to switch from the drive current to a measurement current.

7. The method according to claim 6 , wherein the step of calculating a current temperature of the heating pipeline according to the current resistance value comprises:
calculating the current temperature of the heating pipeline based on a formula as below:

T
c

=

(

R
c

*

(

T
+

T
0

)

R
0

-
T

)

*
K

,

wherein T c represents the current temperature, R c represents the current resistance value, T 0 represents the initial temperature value, R 0 represents the initial resistance value, T represents a resistance temperature constant, and K represents a calibration constant.

8. The method according to claim 1 , wherein after the step of calculating a current temperature of the heating pipeline according to the current resistance value, the method further comprises:
comparing the current temperature with a preset temperature and outputting a dynamic control signal according to a comparison result to adjust an output power of the power supply.

9. The method according to claim 8 , wherein, the step of comparing the current temperature with the preset temperature, and outputting a dynamic control signal according to a comparison result to adjust an output power of the power supply comprises:
outputting a first dynamic control signal when the current temperature is between a maximum preset temperature alarm value and a minimum preset temperature alarm value to control the power supply to maintain the current output power, such that the temperature of the heating pipeline is maintained between the maximum preset temperature alarm value and the minimum preset temperature alarm value;
outputting a second dynamic control signal when the current temperature is higher than the preset temperature of the heating pipeline and exceeds the maximum preset temperature alarm value to control the power supply to reduce the output power until the temperature of the heating pipeline is lowered to be between the maximum preset temperature alarm value and the minimum preset temperature alarm value; and
outputting a third dynamic control signal when the current temperature is lower than the preset temperature of the heating pipeline and is lower than the minimum preset temperature alarm value to control the power supply to increase the output power until the temperature of the heating pipeline is increa

Assignees

• Bmc Medical Co Ltd

Inventors

• Zhuang Zhi

Classifications

• H05B3/58

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• A61M16/1095

  in the connecting tubes · CPC title

• A61M16/10

  Preparation of respiratory gases or vapours · CPC title

• A61M2205/3368

  Temperature · CPC title

• G01K7/16 Primary

  using resistive elements · CPC title