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Temperature measuring circuit and control method for ear thermometer, and ear thermometer

A technology of temperature measurement circuit and control method, which is applied in the direction of electric radiation detectors, etc., can solve problems such as fluctuations and inaccurate human body temperature, and achieve the effect of improving accuracy

Pending Publication Date: 2021-04-23
可孚医疗科技股份有限公司
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AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to overcome the inaccurate human body temperature obtained by the existing human body temperature measuring equipment due to fluctuations in the output pressure difference of its infrared thermopile

Method used

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  • Temperature measuring circuit and control method for ear thermometer, and ear thermometer
  • Temperature measuring circuit and control method for ear thermometer, and ear thermometer
  • Temperature measuring circuit and control method for ear thermometer, and ear thermometer

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Embodiment Construction

[0034] It should be noted that, under the condition that there is no conflict in structure or function, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below based on examples.

[0035] The present invention proposes a temperature measuring circuit for an ear thermometer, such as figure 1 As shown, the temperature measurement circuit includes a thermopile 10, a heating module 70, an amplification module 20, an analog-to-digital converter 30 and a processor 40;

[0036] The thermopile 10 includes a thermopile negative terminal The-, a thermopile positive terminal The+ and a temperature detection output terminal, the thermopile positive terminal The+ is connected to the first input terminal of the amplifying module 20, and the thermopile negative terminal The- is connected to the second input terminal of the amplifying module 20. The input terminal is connected to the...

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Abstract

The invention relates to a temperature measuring circuit and a control method for an ear thermometer, and the ear thermometer. By adding a heating module, the working state of the heating module is controlled by a processor, and when the ear thermometer detects the temperature in the auricle, the processor controls the heating module to start working and reads whether the temperature in the auricle reaches a preset temperature or not; and after the preset temperature is reached, the processor reads the voltage detected by the thermopile, and determines the human body temperature according to the voltage and the actual temperature in the current auricle. The preset temperature is close to the normal temperature of the surface of the human body, so that the probe of the thermopile is heated to the temperature close to the temperature of the human body, the received heat radiated by the auricle cannot be lost, and the output voltage accurately corresponds to the temperature of the human body. Therefore, the accuracy of the detected human body temperature is effectively improved.

Description

technical field [0001] The invention relates to a temperature measuring circuit for an ear thermometer, a control method and the ear thermometer, which are applied in the field of temperature measuring equipment. Background technique [0002] At present, the temperature measuring equipment used to detect the temperature of the human body, such as ear thermometers, forehead thermometers, etc., the detection circuit is mainly based on the infrared thermopile sensor, which receives the infrared light of the human body at close range through the infrared thermopile and converts it into a voltage. The strength is related to the body temperature of the human body, and the corresponding human body temperature is calculated according to the detected voltage. The general infrared thermopile sensor includes a positive output terminal and a negative output terminal. There is a pressure difference between the positive output terminal and the negative output terminal. During use, due to...

Claims

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Application Information

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IPC IPC(8): G01J5/14G01J5/16
Inventor 李勇杨光磊
Owner 可孚医疗科技股份有限公司
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