A METHOD FOR CALIBRATION OF TEMPERATURE SENSORS

Abstract

ABSTRACT A METHOD FOR CALIBRATION OF TEMPERATURE SENSORS The present invention relates to a method for calibration of temperature sensors. The method involves using a temperature-controlled chamber and a reference sensor to generate calibration coefficients for the temperature sensor to be calibrated. The temperature-controlled chamber provides a stable temperature environment, while the reference sensor provides accurate temperature measurements. In the method, the temperature sensor to be calibrated is inserted into the temperature-controlled chamber, and a reference sensor is also inserted into the chamber. The chamber is stabilized to a desired temperature using a temperature controller, and temperature readings from both the temperature sensor and the reference sensor are recorded at regular intervals over a specified time period. The recorded temperature readings are used to calculate calibration coefficients for the temperature sensor to be calibrated using a least-squares fit of the recorded data.

Specification

Description:FORM 2

THE PATENTS ACT, 1970
(39 of 1970)
&
THE PATENT RULES, 2003
Complete Specification
(See section 10 and rule 13)



1.Title of the Invention : A METHOD FOR CALIBRATION OF TEMPERATURE SENSORS



2. Applicant Name : Dr.M.G.R Educational and Research
Institute

Nationality : Indian

Address : Periyar E.V.R High Road, Maduravoyal, Chennai 600095, Tamil Nadu


3. Preamble to the Description :

The following specification particularly describes the invention and the manner in which it is to be performed.


4. DESCRIPTION
FIELD OF THE INVENTION
The present invention relates to a method for calibrating temperature sensors used in various industries, including but not limited to, automotive, aerospace, and medical.
BACKGROUND OF THE INVENTION
Temperature sensors are widely used in various industries to measure and monitor temperature. However, due to the variations in the manufacturing process and environmental factors, temperature sensors can have measurement errors, leading to inaccurate temperature readings. Calibration of temperature sensors is necessary to ensure accurate temperature measurements. Conventional calibration methods involve using a reference temperature sensor, which can be expensive and time-consuming. Therefore, there is a need for a more efficient and cost-effective method for calibrating temperature sensors.
SUMMARY OF THE INVENTION
The present invention provides a novel method for calibrating temperature sensors that is more efficient and cost-effective than conventional methods. The method involves using a temperature-controlled chamber and a thermocouple reference sensor to calibrate the temperature sensor. The temperature-controlled chamber provides a stable temperature environment, while the thermocouple reference sensor provides accurate temperature measurements. The method is applicable to various types of temperature sensors, including resistance temperature detectors (RTDs), thermocouples, and thermistors.
DETAILED DESCRIPTION OF THE INVENTION
The method for calibrating temperature sensors involves using a temperature-controlled chamber and a thermocouple reference sensor to generate calibration coefficients for the temperature sensor to be calibrated. The temperature-controlled chamber provides a stable temperature environment, while the thermocouple reference sensor provides accurate temperature measurements.
The present invention relates to a method for calibration of temperature sensors. The method involves using a temperature-controlled chamber and a reference sensor to generate calibration coefficients for the temperature sensor to be calibrated. The temperature-controlled chamber provides a stable temperature environment, while the reference sensor provides accurate temperature measurements. In the method, the temperature sensor to be calibrated is inserted into the temperature-controlled chamber, and a reference sensor is also inserted into the chamber. The chamber is stabilized to a desired temperature using a temperature controller, and temperature readings from both the temperature sensor and the reference sensor are recorded at regular intervals over a specified time period. The recorded temperature readings are used to calculate calibration coefficients for the temperature sensor to be calibrated using a least-squares fit of the recorded data.
The calibration coefficients are then used to correct any measurement errors in the temperature sensor, enabling accurate temperature measurements to be obtained. The method is highly flexible and can be used with various types of temperature sensors, including resistance temperature detectors, thermocouples, and thermistors.
The method offers a significant improvement over existing temperature sensor calibration methods, providing a highly accurate and efficient means of calibrating temperature sensors. The method has a wide range of potential applications in various industries, including automotive, aerospace, and medical, where accurate temperature measurements are essential.
Overall, the method for calibration of temperature sensors using a temperature-controlled chamber and a reference sensor provides a cost-effective and reliable solution to calibration of temperature sensors. The use of automation and advanced software algorithms ensures that accurate temperature measurements can be obtained quickly and efficiently.
In step 1, the temperature-controlled chamber is prepared by ensuring that it is clean and free of any debris or contaminants. The chamber is then stabilized to a desired temperature using a temperature controller. The temperature controller ensures that the temperature remains stable throughout the calibration process, which is essential for accurate temperature measurements.

In step 2, the temperature sensor to be calibrated is inserted into the temperature-controlled chamber. The temperature sensor can be any type of temperature sensor, including resistance temperature detectors (RTDs), thermocouples, and thermistors.

In step 3, a reference thermocouple sensor is inserted into the temperature-controlled chamber next to the temperature sensor to be calibrated. The reference thermocouple sensor provides accurate temperature measurements, which will be used to calibrate the temperature sensor.

In step 4, temperature readings from both the temperature sensor to be calibrated and the reference thermocouple sensor are recorded at regular intervals over a specified time period. The time period can vary depending on the temperature range and stability of the temperature-controlled chamber. The recorded temperature readings should cover a range of temperatures to ensure that the calibration curve is accurate throughout the temperature range.

In step 5, calibration coefficients are calculated for the temperature sensor to be calibrated using the recorded temperature readings. The calibration coefficients are typically calculated using a least-squares fit of the recorded data. The calibration coefficients are then used to correct for any measurement errors in the temperature sensor. The calibration coefficients can be used to generate a calibration curve for the temperature sensor, which can be used to correct temperature measurements in real-time.

Overall, the method for calibrating temperature sensors using a temperature-controlled chamber and a thermocouple reference sensor provides an efficient and cost-effective method for calibrating temperature sensors. The method is applicable to various types of temperature sensors and can be used to generate accurate temperature measurements in real-time. The method can be used in various industries, including but not limited to, automotive, aerospace, and medical, where accurate temperature measurements are
 




, Claims:CLAIMS
We Claim:
1. A method for calibrating a temperature sensor, comprising:
(a) preparing a temperature-controlled chamber;
(b) inserting a temperature sensor to be calibrated into the temperature-controlled chamber;
(c) inserting a reference thermocouple sensor into the temperature-controlled chamber;
(d) recording temperature readings from the temperature sensor to be calibrated and the reference thermocouple sensor at regular intervals over a specified time period;
(e) calculating calibration coefficients for the temperature sensor to be calibrated using the recorded temperature readings; and
(f) using the calibration coefficients to correct for measurement errors in the temperature sensor.

2. The method of claim 1, wherein the temperature sensor to be calibrated is a resistance temperature detector (RTD), thermocouple, or thermistor.
3. The method of claim 1, wherein the temperature-controlled chamber is stabilized to a desired temperature using a temperature controller.
4. The method of claim 1, wherein the reference thermocouple sensor is a type K or type T thermocouple.
5. The method of claim 1, wherein the recorded temperature readings are used to generate a calibration curve for the temperature sensor to be calibrated.
Dated this the 19th November 2024

Digitally signed
Senthil Kumar B
Agent for the applicant
IN/PA-1549

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