阅读说明：本技术 一种红外快速检测人体温度装置 (Infrared human temperature rapid detection device ) 是由 侯占华 于 2019-10-18 设计创作，主要内容包括：一种红外快速检测人体温度装置,包括红外测温模块、环境测温模块、主控模块、显示模块、外围电路模块；所述红外测温模块包括红外传感器及数字信号处理单元；所述外围电路模块包括复位电路、上下限温度控制电路、报警电路、晶振电路；所述红外测温模块、环境测温模块、显示模块、外围电路模块分别于主控模块连接；本发明是根据红外线传感器对体温进行信号的采集,然后把光信号转换为电信号,再利用放大电路把采集到的电信号进行放大,再将放大的电信号送入单片机中,然后单片机在利用温度传感器对周围环境温度的采集信号与传感器采集的信号进行分析处理,最后将分析处理后的数据转换成相对应的温度数值输出。(An infrared rapid human body temperature detection device comprises an infrared temperature measurement module, an environment temperature measurement module, a main control module, a display module and a peripheral circuit module; the infrared temperature measurement module comprises an infrared sensor and a digital signal processing unit; the peripheral circuit module comprises a reset circuit, an upper limit temperature control circuit, a lower limit temperature control circuit, an alarm circuit and a crystal oscillator circuit; the infrared temperature measurement module, the environment temperature measurement module, the display module and the peripheral circuit module are respectively connected with the main control module; the invention collects body temperature signal according to infrared sensor, then converts light signal into electric signal, then amplifies the collected electric signal by using amplifying circuit, then sends the amplified electric signal into single chip, then the single chip analyzes the collected signal of ambient temperature and the signal collected by the sensor by using temperature sensor, finally converts the analyzed data into corresponding temperature value to output.)

1. An infrared rapid human body temperature detection device is characterized by comprising an infrared temperature measurement module, an environment temperature measurement module, a main control module, a display module and a peripheral circuit module; the infrared temperature measurement module comprises an infrared sensor and a digital signal processing unit; the peripheral circuit module comprises a reset circuit, an upper limit temperature control circuit, a lower limit temperature control circuit, an alarm circuit and a crystal oscillator circuit; the infrared temperature measurement module, the environment temperature measurement module, the display module and the peripheral circuit module are respectively connected with the main control module; the main control module adopts an STC89C52 singlechip.

2. The infrared fast human body temperature detection device of claim 1, wherein the digital signal processing unit comprises a digital signal processor, a low noise amplifier, a pyroelectric infrared sensor, a low pass filter, a differential amplifier ADC; the environment radiation of the environment temperature sensor is an electronic signal, and the infrared radiation of the infrared thermopile sensor is a low-noise amplifier rear differential amplifier ADC of the electronic signal; the output digital signal of the ADC FIR/IIR low-pass filter is changed into a digital signal processor, and the digital signal processor processes the output measurement result after operation and stores the internal RAM of the infrared sensor, such as a sending singlechip.

3. The infrared fast human body temperature detection device of claim 1, wherein the ambient temperature module comprises an ambient temperature sensor, a 64-bit photoetching ROM, non-volatile temperature alarm triggers TH and TL, and a configuration register.

4. The infrared fast human body temperature detection device of claim 2, wherein the infrared sensor is a MLX90615SSG-DSG infrared sensor.

5. The infrared fast human body temperature detection device of claim 2, wherein the temperature sensor is a DS18B20 temperature sensor.

6. The infrared fast human body temperature detection device as claimed in claim 1, wherein the pin RST of the reset circuit is introduced to AT89C51 AT a high level and maintains the machine for two operating cycles when executed.

7. The infrared fast human body temperature detection device of claim 1, wherein the circuit for upper and lower temperature limit control is connected to each interface of the single chip microcomputer by four respective micro switches.

8. The infrared fast human body temperature detection device of claim 1, wherein the alarm circuit is connected with a speaker.

9. The infrared device for rapidly detecting the temperature of a human body according to claim 1, wherein the crystal oscillator circuit comprises a crystal oscillator combined with a circuit inside the single chip microcomputer.

Technical Field

The invention relates to the technical field of body temperature measurement, in particular to a device for rapidly detecting human body temperature by infrared.

Background

The body temperature is the core temperature of the human body, namely the average temperature of the deep layer of the human body, the body temperature can reflect the health condition of the human body, the accuracy of the body temperature can directly influence the diagnosis of diseases, the treatment of diseases and the nursing of diseases, and the body temperature is a reaction product reflecting the human bodyImportant index of physical health^[4]. In clinical practice, oral temperature, rectal temperature and axillary temperature are generally used as indexes for measuring body temperature^[5]. The traditional body temperature measurer is used for measuring in a contact mode with a machine body according to the principle of expansion with heat and contraction with cold, has the advantages of low price, stable performance, small error and the like, and has the defects of easiness in cross infection, long measuring time, insufficient contact, larger error and the like. Due to outbreaks of epidemic diseases such as SARS in 2003, avian influenza in 2004, H1N1 influenza A in 2009 and the like, which are high in outbreak, high in infectivity and the like, the traditional contact type body temperature measurer cannot meet the requirements of people, and the rapid, accurate and non-contact infrared thermometer is widely applied to occasions with dense personnel and large flow, such as airports, stations, communities and the like.

However, the non-contact infrared thermometer is limited by its non-contact measurement method, and has a problem in terms of ensuring the measurement accuracy and stability.

Disclosure of Invention

The invention aims to solve the technical problem of providing an infrared rapid human body temperature detection device which has high temperature resolution, high response speed in the detection process, stable measurement performance and reduced measurement error and is not easy to be interfered by external objects.

In order to solve the technical problems, the invention adopts the following technical scheme:

an infrared rapid human body temperature detection device is characterized by comprising an infrared temperature measurement module, an environment temperature measurement module, a main control module, a display module and a peripheral circuit module; the infrared temperature measurement module comprises an infrared sensor and a digital signal processing unit; the peripheral circuit module comprises a reset circuit, an upper limit temperature control circuit, a lower limit temperature control circuit, an alarm circuit and a crystal oscillator circuit; the infrared temperature measurement module, the environment temperature measurement module, the display module and the peripheral circuit module are respectively connected with the main control module; the main control module adopts an STC89C52 singlechip.

Further, the digital signal processing unit comprises a digital signal processor, a low noise amplifier, a pyroelectric infrared sensor, a low-pass filter and a differential amplifier ADC; the environment radiation of the environment temperature sensor becomes electronic signals, and the infrared radiation of the infrared thermopile sensor becomes a differential amplifier ADC behind the low noise amplifier of the electronic signals. The output digital signal of the ADC FIR/IIR low-pass filter is changed into a digital signal processor, and the digital signal processor processes the output measurement result after operation and stores the internal RAM of the infrared sensor, such as a sending singlechip.

Further, the environment temperature module comprises an environment temperature sensor, a 64-bit photoetching ROM, non-volatile temperature alarm triggers TH and TL and a configuration register.

Further, the infrared sensor is an MLX90615SSG-DSG infrared sensor.

Further, the temperature sensor is a DS18B20 temperature sensor.

Further, pin RST of the reset circuit is introduced AT89C51 AT a high level and holds the machine for two operating cycles when executed.

Furthermore, the circuit for controlling the upper and lower temperature limits is connected to each interface of the singlechip by four respective microswitches.

Further, the alarm circuit is connected with a loudspeaker.

Further, the crystal oscillator circuit comprises a crystal oscillator, and is combined with a circuit inside the single chip microcomputer.

The invention collects body temperature signals according to an infrared sensor, converts optical signals into electric signals, amplifies the collected electric signals by using an amplifying circuit, sends the amplified electric signals into a singlechip, analyzes and processes the collected signals of ambient temperature and the signals collected by the sensor by using a temperature sensor by using the singlechip, finally converts the analyzed and processed data into corresponding temperature values, transmits the temperature values to an LCD display and displays the temperature values on the display, and simultaneously, the ambient temperature can be displayed on the display, so that the invention has the advantages of high temperature resolution, high response speed in the detection process, difficulty in interference of external objects, stable measurement performance, reduction of measurement errors and the like.

Drawings

FIG. 1 is an overall framework of the present invention;

FIG. 2 is a schematic diagram of an infrared temperature measurement module;

FIG. 3 is a schematic diagram of an ambient temperature module;

FIG. 4 is a schematic diagram of a reset circuit;

fig. 5 is a schematic circuit diagram of upper and lower temperature limit control.

Detailed Description

The invention is further described with reference to the following figures and examples. Wherein the showings are for the purpose of illustration only and are shown by way of illustration only and not in actual form, and are not to be construed as limiting the present patent; to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

The invention provides an infrared rapid human body temperature detection device, which comprises an infrared temperature measurement module, an environment temperature measurement module, a main control module, a display module and a peripheral circuit module, wherein the infrared temperature measurement module is connected with the main control module; the infrared temperature measurement module comprises an infrared sensor and a digital signal processing unit; the peripheral circuit module comprises a reset circuit, an upper limit temperature control circuit, a lower limit temperature control circuit, an alarm circuit and a crystal oscillator circuit, wherein the alarm circuit is connected with a loudspeaker, and the crystal oscillator circuit comprises a crystal oscillator and is combined with a circuit in the single chip microcomputer; the infrared temperature measurement module, the environment temperature measurement module, the display module and the peripheral circuit module are respectively connected with the main control module; the main control module adopts an STC89C52 singlechip.

As shown in fig. 2 and 3, the digital signal processing unit includes a digital signal processor, a low noise amplifier, a pyroelectric infrared sensor, a low pass filter, and a differential amplifier ADC; the environment radiation of the environment temperature sensor becomes electronic signals, and the infrared radiation of the infrared thermopile sensor becomes a differential amplifier ADC behind the low noise amplifier of the electronic signals. The output digital signal of the ADC FIR/IIR low-pass filter is changed into a digital signal processor, and the digital signal processor processes the output measurement result after operation and stores the internal RAM of the infrared sensor, such as a sending singlechip. The environment temperature module comprises an environment temperature sensor, a 64-bit photoetching ROM, non-volatile temperature alarm triggers TH and TL and a configuration register.

As shown in fig. 4, the high level of the pin RST of the reset circuit is introduced into the AT89C51, and the reset circuit is implemented by holding the machine for two operating cycles, using both the high power-on and manual reset keys. If the reset is to be realized, the manual reset button reset circuit is powered on, and when the zombie program state is entered, the manual reset is selected. The method is convenient to use, and the reset can be realized without restarting a power supply of the single chip microcomputer.

As shown in FIG. 5, the circuit for controlling the upper and lower temperature limits is connected to the I/O interfaces of P21, P22, P23 and P24 of the single chip microcomputer by four micro switches K1, K2, K3 and K4 respectively. K1, K2 are used to adjust the upper temperature limit value, wherein K1 increases the upper temperature limit value and K2 decreases the upper temperature limit value; k3, K4 are used to adjust the lower limit value of the temperature, wherein K3 increases the lower limit value of the temperature and K4 decreases the lower limit value of the temperature^[29]. The upper and lower limit temperature control circuits are designed to stabilize temperature values, avoid exceeding early warning values and reduce numerical errors.

In this embodiment, the infrared sensor is an MLX90615SSG-DSG infrared sensor, and the temperature sensor is a DS18B20 temperature sensor.

The invention collects body temperature signals according to an infrared sensor, converts optical signals into electric signals, amplifies the collected electric signals by using an amplifying circuit, sends the amplified electric signals into a singlechip, analyzes and processes the collected signals of ambient temperature and the signals collected by the sensor by using a temperature sensor by using the singlechip, finally converts the analyzed and processed data into corresponding temperature values, transmits the temperature values to an LCD display and displays the temperature values on the display, and simultaneously, the ambient temperature can be displayed on the display, so that the invention has the advantages of high temperature resolution, high response speed in the detection process, difficulty in interference of external objects, stable measurement performance, reduction of measurement errors and the like.

It should be understood that the above examples are only for clearly illustrating the technical solutions of the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.