Method and device for measuring temperature

Abstract

The present invention provides a method and device for measuring a temperature, relating to the field of temperature measurement. The method comprises a step of measuring the temperature of an object through a non-contact temperature sensor and obtaining a first temperature value, a step of measuring the temperatures of the object at a first sampling time and a second sampling time through a contact temperature sensor and obtaining a third temperature value and a fourth temperature value, a step of determining a sampling time interval according to the first sampling time and the second sampling time, and determining a sampling temperature interval according to the third temperature value and a fourth temperature value, a step of calculating and obtaining a temperature compensation value according to the thermal conductivity of the temperature probe material of the contact temperature sensor, the sampling time interval, the sampling temperature interval, the first temperature value, the first sampling time and the third temperature value, and a step of calculating and obtaining the actual temperature of the object according to the temperature compensation value, the third temperature value, the fourth temperature value, the sampling time interval and a preset error coefficient to realize fast and accurate temperature measurement.

Description

technical field [0001] The invention relates to the field of temperature measurement, in particular to a method and device for temperature measurement. Background technique [0002] The existing human body temperature measurement is divided into two categories according to the form of the temperature probe: one is the contact type, which uses the heat balance method to obtain body temperature. The probe can be a thermistor, platinum resistance thermometer, mercury, etc. This method is currently the standard method for measuring body temperature , the disadvantage is that it takes a long time to measure because it takes a certain amount of time to reach thermal equilibrium. The other is non-contact, which uses human body heat radiation to obtain body temperature. The probe can be an infrared sensor. This method is characterized by short measurement time, but large measurement errors. In order to obtain accurate body temperature, medical body temperature measurement generally...

AI Technical Summary

Problems solved by technology

[0005] There is a contradiction between temperature detection speed and detection accuracy: fast detection speed will lead to a decrease in prediction accuracy, mainly because the predicted value is easily affected by the temperature sampling time: if the sampling time is in the region of drastic temperature changes (such as starting measurement 20s), At this time, the heat mainly comes from the body surface of the human body, and the temperature predicted by using the sampling value at this stage has a large error. Therefore, in order to ensure the accuracy of the measured temperature using the traditional prediction method, it is generally necessary to wait for a period of time after the measurement starts to wait for the temperature to change. When the speed is reduced to a certain level, sampling and predictive calculations are performed. Although this is faster than the traditional continuous measurement thermometer, it cannot meet the daily needs for rapid temperature measurement, and the rapid temperature measurement in the prior art cannot adapt to complex The measurement conditions, the measured object and the measurement site in the actual measurement will affect the final measurement result. Even if the same person is measured, the measurement result will be affected by various factors such as the heat conduction mode of the sensor, the surface state of the sensor and the measured person, and the contact state. They are not the same, and cannot meet the requirements of fast speed and high precision in the temperature measurement process

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