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Temperature measuring circuit of forehead thermometer and temperature measuring method thereof

A technology of temperature measurement circuit and forehead temperature gun, which is applied in the field of temperature measurement, can solve the problems of leakage alarm of forehead temperature gun and failure to reflect the real body temperature of the person under test, so as to ensure the speed of temperature measurement and overcome the defects of high temperature areas that are easy to miss. , the effect of increasing the difficulty of use

Active Publication Date: 2021-09-21
深圳市奕承达科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing forehead temperature guns use infrared sensors to detect the temperature. The infrared sensor can only measure the temperature of a single point. During actual use, the user may sometimes point the forehead thermometer at a place with a lower temperature, causing the measured temperature to fail to reflect the real body temperature of the person being tested, making the forehead thermometer prone to false alarms, that is, being blocked. The actual body temperature of the person being tested exceeds the normal value, but the forehead thermometer does not alarm, especially when the body temperature of the person being tested is relatively close to the critical value of each temperature range, the above situation is more likely to occur

Method used

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  • Temperature measuring circuit of forehead thermometer and temperature measuring method thereof

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Embodiment 1

[0022] A temperature measurement circuit of a forehead temperature gun includes an MCU module and an infrared temperature sensor, and also includes an infrared thermal imaging module connected to the MCU module, a button module, a crystal oscillator circuit, a memory module, a buzzer, a display screen and a power management module.

[0023] Wherein, the infrared thermal imaging module is connected with the data interface of the MCU module, and is used to photograph the target area and generate the infrared thermal image of the target area, and transmit the image data to the MCU through the data interface, and the image data is temporarily stored in the memory module; the button module Both the display and the display are connected to the I / O port of the MCU module; the buzzer is connected to the PWM signal output port of the MCU module; the power supply module is connected to the power interface of the above-mentioned modules and components to supply power to the entire temperat...

Embodiment 2

[0037] A method for measuring temperature with a forehead thermometer, comprising the following steps:

[0038] S1. Use the infrared thermal imaging module to take an infrared thermal imaging image of the target part, and detect the temperature value T1 of the target area through the infrared temperature sensor.

[0039] S2. Process the infrared thermal imaging image, identify the brightest area in the image, find out the corresponding relationship between the brightness value of the brightest area and the temperature of the target area, and output the corresponding temperature value T2.

[0040] Here, the processing steps of the infrared thermal imaging image specifically include: grayscale processing is performed on the image, and each pixel in the image has a grayscale value after the grayscale processing. The brighter the area in the infrared thermal image corresponds to the higher the body temperature; and the brighter the pixel in the grayscale image, the larger the gray...

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Abstract

The invention discloses a temperature measuring circuit of a forehead thermometer. The circuit comprises an MCU module and an infrared temperature sensor, and is characterized by further comprising an infrared thermal imaging module, a key module, a crystal oscillation circuit, a memory module, a buzzer, a display screen and a power management module which are connected with the MCU module, and the infrared temperature sensor is connected with the MCU module through a signal amplification circuit. According to the temperature measurement circuit, two temperature measurement modes are combined so that the defect that a high-temperature area is easy to miss during single-point temperature measurement of an infrared temperature sensor can be overcome, and the defect that the recognition speed of an infrared thermal image is relatively low is overcome too. Through dual detection and judgment, the temperature measurement circuit automatically captures the highest temperature value of the target part, a user does not need to judge the high-temperature part, the use difficulty is not increased, and the temperature measurement speed of the temperature measurement circuit can be ensured.

Description

technical field [0001] The invention relates to the technical field of temperature measurement, more specifically, it relates to a temperature measurement circuit of a forehead temperature gun and a temperature measurement method thereof. Background technique [0002] The average body temperature of the human body is between 36 and 37°C. If it exceeds 37.1°C, it is a fever, 37.3-38°C is a low-grade fever, 38.1-40°C is a high fever, and a temperature above 40°C is life-threatening at any time. The forehead thermometer is very simple and convenient to use, does not need to touch human skin, avoids cross-infection, and measures temperature with one button. It is suitable for home users, hotels, libraries, large enterprises and institutions, and can also be used in hospitals, schools, customs, airports, etc. The comprehensive place can also be provided to medical staff for use in the clinic. [0003] In fact, the temperature distribution of a person's forehead and wrist is unev...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01J5/20G01J5/06G05B19/042
CPCG01J5/20G01J5/06G05B19/0423G05B2219/24215
Inventor 白建勇倪志刚
Owner 深圳市奕承达科技有限公司