CN111623885B - Infrared temperature measuring device and infrared temperature measuring method - Google Patents
Infrared temperature measuring device and infrared temperature measuring method Download PDFInfo
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/0022—Radiation pyrometry, e.g. infrared or optical thermometry for sensing the radiation of moving bodies
- G01J5/0025—Living bodies
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/80—Calibration
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- G—PHYSICS
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Abstract
The application relates to the technical field of infrared temperature measurement, and provides an infrared temperature measurement device and an infrared temperature measurement method, wherein temperature measurement is carried out when a person to be measured is within the measurement distance of an infrared temperature sensor and the person to be measured meets a preset measurement standard, so that the forehead temperature measured by the infrared temperature sensor is ensured to be the true forehead temperature of the person to be measured; meanwhile, in the use process, the power supply electric quantity of the infrared temperature measuring device can be gradually reduced, the electric quantity can be reduced to cause power supply voltage deviation, and therefore the measured data of the infrared temperature sensor is inaccurate, the measured forehead temperature is compensated by the current power supply voltage, the influence of the power supply voltage deviation on temperature measurement is eliminated, and accurate body temperature data are obtained. Compared with the prior art, the infrared temperature measuring device provided by the application can improve the measuring accuracy.
Description
Technical Field
The application relates to the technical field of infrared temperature measurement, in particular to an infrared temperature measurement device and an infrared temperature measurement method.
Background
During the transmission of respiratory infectious diseases, the temperature of human bodies needs to be monitored in many places, so that virus carriers can be found in time through abnormal body temperature.
The temperature measuring device is contacted with the human body, so that the risk of cross infection exists in places with large flow of people; and the infrared temperature measuring device which obtains the body temperature of the person to be measured by using the infrared energy emitted by the human body, such as a forehead temperature gun and the like, can reduce the risk of cross infection due to the advantage of non-contact temperature measurement, and is widely used during the disease transmission period.
However, the existing infrared temperature measuring device (such as a forehead temperature gun) has the problem of inaccurate temperature detection.
Disclosure of Invention
An object of the application is to provide an infrared temperature measuring device and an infrared temperature measuring method, which are used for solving the problem that the existing infrared temperature measuring device has inaccurate temperature detection.
In a first aspect, the application provides an infrared temperature measuring device, which comprises a main controller, and an infrared temperature sensor and an analog-to-digital conversion module which are electrically connected with the main controller; the main controller is used for controlling the infrared temperature sensor to measure the forehead temperature of the person to be measured when the fact that the distance between the person to be measured and the infrared temperature sensor is smaller than or equal to a preset distance and the person to be measured meets a preset measuring standard is detected; the main controller is further used for obtaining the current power supply voltage of the infrared temperature sensor measured by the analog-to-digital conversion module, and compensating the forehead temperature by using the current power supply voltage to obtain body temperature data of the person to be measured.
Further, the main controller is further configured to compensate the forehead temperature by using the current power supply voltage according to a preset compensation formula to obtain the body temperature data;
the preset compensation formula is as follows: T1-T0-K1 (VDD-V0), where T1 represents the body temperature data, T0 represents the rated temperature, K1 represents a supply voltage influence coefficient, VDD represents the current supply voltage, and V0 represents a supply voltage having no influence on the body temperature data.
Furthermore, the infrared temperature measuring device also comprises an ambient temperature sensor, and the ambient temperature sensor is electrically connected with the main controller;
the main controller is further used for obtaining the current environment temperature of the person to be measured by the environment temperature sensor, and calibrating the body temperature data by using the current environment temperature to obtain the calibrated body temperature data.
Further, the main controller is further configured to calibrate the body temperature data by using the current environment temperature according to a preset calibration formula to obtain the calibrated body temperature data;
the preset calibration formula is as follows: t2 ═ T1+ K2 × (TA-TN), where T2 denotes the body temperature data after calibration, T1 denotes the body temperature data, K2 denotes an ambient temperature influence coefficient, TA denotes the current ambient temperature, and TN denotes an ambient temperature having no influence on the body temperature data.
Furthermore, the infrared temperature measuring device also comprises a camera module, and the camera module is electrically connected with the main controller; the camera module comprises a first camera and a second camera which have at least partial overlapping view-finding ranges, the first camera and the second camera are positioned on the same horizontal plane, and the camera module and the infrared temperature sensor are positioned on the same vertical plane;
the camera module is used for collecting a left image and a right image of the person to be detected and sending the left image and the right image to the main controller;
the main controller is further used for calculating the distance between the person to be measured and the infrared temperature sensor according to the left image and the right image:
the main controller is further used for comparing the distance with the preset distance and controlling the camera module to collect the face image of the person to be detected when the distance is smaller than or equal to the preset distance;
the main controller is further used for judging whether the person to be measured meets a preset measurement standard or not according to the face image, and controlling the infrared temperature sensor to measure the forehead temperature of the person to be measured when the person to be measured meets the preset measurement standard.
Furthermore, the infrared temperature measuring device also comprises a loudspeaker which is electrically connected with the main controller; the main controller is further used for controlling the loudspeaker to broadcast a first prompt voice when the distance is larger than the preset distance so as to prompt the person to be measured to adjust the distance between the person to be measured and the infrared temperature sensor; and the main controller is also used for controlling the loudspeaker to broadcast a second prompt voice to prompt the person to be measured to adjust when the person to be measured is judged not to meet the preset measurement standard.
Furthermore, the infrared temperature measuring device also comprises a communication module, and the main controller is in communication connection with the server through the communication module; the main controller is further used for sending the body temperature data and the face image of the person to be tested to the server through the communication module, so that the server can determine the identity information of the person to be tested according to the face image and store the identity information and the body temperature data of the person to be tested.
Furthermore, the infrared temperature measuring device also comprises a bracket; the support is used for fixing the camera module with infrared temperature sensor, so that the first camera with the second camera is equidistantly located on the two horizontal sides of infrared temperature sensor, and the camera module with infrared temperature sensor is located on the same vertical plane.
In a second aspect, the application also provides an infrared temperature measurement method, which is applied to an infrared temperature measurement device, wherein the infrared temperature measurement device comprises a main controller, an infrared temperature sensor and an analog-to-digital conversion module, and the infrared temperature sensor and the analog-to-digital conversion module are electrically connected with the main controller;
the infrared temperature measurement method comprises the following steps:
the main controller controls the infrared temperature sensor to measure the forehead temperature of the person to be measured when the main controller detects that the distance between the person to be measured and the infrared temperature sensor is smaller than or equal to a preset distance and the person to be measured meets a preset measurement standard; the main controller obtains the current power supply voltage of the infrared temperature sensor measured by the analog-to-digital conversion module, and compensates the forehead temperature by using the current power supply voltage to obtain the body temperature data of the person to be measured.
Furthermore, the infrared temperature measuring device also comprises a camera module, and the camera module is electrically connected with the main controller; the camera module comprises a first camera and a second camera which have at least partial overlapping view-finding ranges, the first camera and the second camera are positioned on the same horizontal plane, and the camera module and the infrared temperature sensor are positioned on the same vertical plane;
the main controller controls the infrared temperature sensor to measure the forehead temperature of the person to be measured when the distance between the person to be measured and the infrared temperature sensor is smaller than or equal to a preset distance and the person to be measured meets a preset measurement standard, and the method comprises the following steps:
the camera module collects a left image and a right image of the person to be detected and sends the left image and the right image to the main controller; the main controller calculates the distance between the person to be measured and the infrared temperature sensor according to the left image and the right image: the main controller compares the distance with the preset distance, and controls the camera module to collect the face image of the person to be detected when the distance is smaller than or equal to the preset distance; the main controller judges whether the person to be measured meets a preset measurement standard or not according to the face image, and controls the infrared temperature sensor to measure the forehead temperature of the person to be measured when the person to be measured meets the preset measurement standard.
According to the infrared temperature measuring device and the infrared temperature measuring method, temperature measurement is carried out when a person to be measured is located within the measuring distance of the infrared temperature sensor and the person to be measured meets the preset measuring standard, and the forehead temperature measured by the infrared temperature sensor is ensured to be the real forehead temperature of the person to be measured; meanwhile, in the use process, the power supply electric quantity of the infrared temperature measuring device can be gradually reduced, the electric quantity can be reduced to cause power supply voltage deviation, and therefore the measured data of the infrared temperature sensor is inaccurate, the measured forehead temperature is compensated by the current power supply voltage, the influence of the power supply voltage deviation on temperature measurement is eliminated, and accurate body temperature data are obtained. Compare with current infrared temperature measuring device, the infrared temperature measuring device that this application provided can improve measuring degree of accuracy.
Drawings
FIG. 1 is a schematic block diagram of an infrared temperature measuring device according to an embodiment of the present disclosure;
FIG. 2 is a schematic block diagram of an infrared temperature measuring device according to an embodiment of the present disclosure;
FIG. 3 is a schematic flow chart illustrating an infrared temperature measurement method according to an embodiment of the present disclosure;
FIG. 4 is a schematic flow chart illustrating an infrared temperature measurement method according to an embodiment of the present disclosure;
fig. 5 is a diagram illustrating an application example of the infrared temperature measurement method according to the embodiment of the present application.
Icon: 10-an infrared temperature measuring device; 11-a master controller; 12-an infrared temperature sensor; 13-an analog-to-digital conversion module; 14-ambient temperature sensor; 15-a camera module; 16-a loudspeaker; 17-a communication module; 20-server.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application.
Referring to fig. 1, fig. 1 is a block diagram illustrating an infrared temperature measuring device 10 according to an embodiment of the present disclosure. The infrared temperature measuring device 10 comprises a main controller 11, an infrared temperature sensor 12 and an analog-to-digital conversion module 13, wherein the main controller 11 is electrically connected with the infrared temperature sensor 12 and the analog-to-digital conversion module 13.
And the main controller 11 is used for controlling the infrared temperature sensor 12 to measure the forehead temperature of the person to be measured when the distance between the person to be measured and the infrared temperature sensor 12 is detected to be smaller than or equal to the preset distance and the person to be measured meets the preset measurement standard.
Typically, the infrared temperature sensor 12 has a certain measurement distance (e.g., 5cm) beyond which measurement data of the infrared temperature sensor 12 may be inaccurate. Therefore, in order to ensure accurate temperature measurement of the infrared temperature sensor 12, it is necessary to ensure that the person to be measured is within the effective measurement distance of the infrared temperature sensor 12.
The person to be measured is within the measurement distance of the infrared temperature sensor 12, that is, the distance between the person to be measured and the infrared temperature sensor 12 is less than or equal to a preset distance, that is, the measurement distance of the infrared temperature sensor 12, for example, 5 cm. In practical applications, the measurement distances of the infrared temperature sensors 12 of different models may be different, and need to be flexibly set according to actual situations.
Alternatively, the infrared temperature sensor 12 may be an infrared thermopile infrared temperature sensor. The infrared thermopile infrared temperature sensor has the following characteristics: temperature detection with medical grade precision and non-contact measurement can be provided; a built-in DSP (Digital Signal Processing) capable of filtering noise; the measuring distance is required to be less than or equal to 5 cm; the object to be measured is fully covered with the visual angle of the sensor; the infrared emissivity of a measured object such as human skin is written into a built-in EEPROM (Electrically Erasable Programmable read only memory) in advance, and the skin temperature can be accurately measured.
As an embodiment, since different types of objects to be measured have different infrared emissivities, a plurality of infrared emissivities may be previously stored in the built-in EEPROM of the infrared thermopile infrared temperature sensor. In the measurement, the type of the measured object can be identified, for example, the image of the measured object is collected and the type of the measured object is identified by adopting an image identification algorithm; and then, the appropriate infrared emissivity is automatically matched according to the type, and the self-adaption of the infrared emissivity is carried out, so that the measurement range and the measurement precision are expanded.
In addition, the temperature measurement principle of the infrared temperature sensor 12 is as follows: the body temperature of the person to be measured is obtained by the infrared energy emitted by the person to be measured, that is, the optical system of the infrared temperature sensor 12 collects the infrared radiation energy in the field of view thereof, so that the infrared radiation energy is focused on the photoelectric detector thereof and converted into a corresponding electric signal, and the electric signal is converted into the temperature value of the person to be measured after being corrected according to a built-in algorithm and infrared emissivity through the amplifier and the signal processing circuit. The factors determining the temperature measurement accuracy include: infrared emissivity, field of view, and distance of the infrared temperature sensor 12 from the person to be measured.
Due to the fact that the infrared emissivity of different materials is different, if a person to be measured wears a hat, a headband or a bang to shield the forehead and the like, the measured value of the infrared temperature sensor 12 is not the real temperature of the forehead of the person to be measured. Therefore, in order for the infrared temperature sensor 12 to measure the real temperature of the forehead of the person to be measured, it is necessary to ensure that the forehead of the person to be measured has no shielding object, for example, no hat, headband, no bang or the like.
The person to be measured meets the preset measurement standard, namely the forehead of the person to be measured does not have a shelter.
The main controller 11 may be an integrated circuit chip with signal processing capability. For example, it may be a general-purpose Processor including a CPU (Central Processing Unit), an NP (Network Processor), and the like; but also DSPs, ASICs (Application Specific Integrated circuits), FPGAs (Field Programmable Gate arrays) or other Programmable logic devices, discrete Gate or transistor logic devices, discrete hardware components.
The main controller 11 is further configured to obtain a current power supply voltage of the infrared temperature sensor 12 measured by the analog-to-digital conversion module 13, and compensate the forehead temperature by using the current power supply voltage to obtain body temperature data of the person to be measured.
In the use, the power supply electric quantity of infrared temperature measuring device 10 can reduce gradually, and the electric quantity reduces and can arouse the power supply voltage skew to lead to infrared temperature sensor's measured data inaccurate, consequently, get rid of the influence that the power supply voltage skew brought temperature measurement, can be through the current power supply voltage who acquires infrared temperature sensor 12, and utilize current power supply voltage to compensate the volume temperature that infrared temperature sensor 12 measured, obtain the personnel's that awaits measuring body temperature data.
As an implementation manner, the main controller 11 is further configured to compensate the forehead temperature by using the current power supply voltage according to a preset compensation formula, so as to obtain body temperature data;
the preset compensation formula is as follows: t1 ═ T0-K1 (VDD-V0), where T1 represents body temperature data, T0 represents rated temperature, K1 represents supply voltage influence coefficient, VDD represents current supply voltage, and V0 represents supply voltage that has no influence on body temperature data.
V0 is a standard power supply voltage for the infrared temperature sensor 12 to perform various tests before shipping, that is, the standard power supply voltage is used to power the infrared temperature sensor 12 without affecting the measurement data of the infrared temperature sensor 12, for example, 3V.
K1 refers to the coefficient of influence of the supply voltage on the measurement data of the infrared temperature sensor 12, which is obtained by fitting a large number of experimental data, for example, 0.6. That is, the measured values of the infrared temperature sensor 12 at different supply voltages are tested, and a straight line is fitted by using each supply voltage and the corresponding measured value, and the standard supply voltage and the corresponding measured value, and the slope of the straight line is K1.
In practical applications, the infrared temperature sensors 12 of different models, K1 and V0 may be different, and need to be flexibly set according to practical situations.
In a possible situation, the ambient temperature may also affect the measurement data of the infrared temperature sensor 12, and an excessively high or excessively low ambient temperature may cause inaccuracy of the measurement data. Therefore, referring to fig. 2 in addition to fig. 1, the infrared temperature measuring device 10 may further include an ambient temperature sensor 14, and the ambient temperature sensor 14 is electrically connected to the main controller 11.
The main controller 11 is further configured to obtain a current ambient temperature of the person to be measured, which is measured by the ambient temperature sensor 14, and calibrate the body temperature data by using the current ambient temperature to obtain calibrated body temperature data.
As an implementation manner, the main controller 11 is further configured to calibrate the body temperature data by using the current ambient temperature according to a preset calibration formula, so as to obtain calibrated body temperature data;
the preset calibration formula is as follows: t2 ═ T1+ K2 × (TA-TN), where T2 denotes calibrated body temperature data, T1 denotes body temperature data, K2 denotes an ambient temperature influence coefficient, TA denotes current ambient temperature, and TN denotes ambient temperature having no influence on body temperature data.
TN is a standard environmental temperature at which the infrared temperature sensor 12 is subjected to various tests before shipment, that is, operating at the standard environmental temperature, and does not affect the measurement data of the infrared temperature sensor 12, for example, 25 ℃.
K2 refers to the coefficient of influence of ambient temperature on the measurement data of the infrared temperature sensor 12, which is obtained by fitting a large number of experimental data, for example, 0.03. That is, the measured values of the infrared temperature sensor 12 at different environmental temperatures are tested, and a straight line is fitted by using each environmental temperature and the corresponding measured value, and the standard environmental temperature and the corresponding measured value, and the slope of the straight line is K2.
In practical applications, the K2 and TN may be different for different models of infrared temperature sensors 12, and need to be flexibly set according to practical situations.
In one possible case, the main controller 11 may detect the distance between the person to be measured and the infrared temperature sensor 12 and whether the person to be measured satisfies the preset measurement standard in conjunction with the image capturing device. Therefore, the infrared temperature measuring device 10 may further include a camera module 15, and the camera module 15 is electrically connected to the main controller 11.
The camera module 15 includes a first camera and a second camera having at least a partially overlapped viewing range, the first camera and the second camera are located on the same horizontal plane, and the camera module 15 and the infrared temperature sensor 12 are located on the same vertical plane. Alternatively, the first camera and the second camera may be fixed at an interval and placed at equal distances on both horizontal sides of the infrared temperature sensor 12.
And the camera module 15 is used for acquiring a left image and a right image of a person to be detected and sending the left image and the right image to the main controller 11.
And the main controller 11 is further configured to calculate a distance between the person to be measured and the infrared temperature sensor according to the left image and the right image. Alternatively, the main controller 11 may calculate the distance between the person to be measured and the infrared temperature sensor 12 through a binocular vision algorithm.
The main controller 11 is further configured to compare the distance with a preset distance, and control the camera module 15 to acquire a face image of the person to be detected when the distance is less than or equal to the preset distance. Optionally, if the distance is less than or equal to a preset distance (e.g., 5cm), the camera module 15 may be controlled to acquire a face image of the person to be measured, and if the distance is greater than the preset distance, the person to be measured is reminded to adjust the distance.
The main controller 11 is further configured to determine whether the person to be measured meets a preset measurement standard according to the face image, and control the infrared temperature sensor 12 to measure the forehead temperature of the person to be measured when it is determined that the person to be measured meets the preset measurement standard.
Optionally, the camera module 15 collects a face image of the person to be measured, sends the face image to the main controller 11 for neural network recognition, recognizes whether the person to be measured meets a preset measurement standard through the neural network, for example, whether the person to be measured wears a hat, a headband, whether the bang blocks the forehead and the like, controls the infrared temperature sensor 12 to measure the forehead temperature of the person to be measured if the person to be measured meets the preset measurement standard, and reminds the person to be measured to remove the hat and the headband, and adjusts the bang and the like if the person to be measured does not meet the preset measurement standard.
In a possible situation, the person to be tested can be reminded by voice to adjust the distance to the infrared temperature sensor 12, take off the cap and the head towel, adjust bang, and the like. Therefore, the infrared temperature measuring device 10 can further comprise a speaker 16, and the speaker 16 is electrically connected with the main controller 11.
The main controller 11 is further configured to control the speaker 16 to broadcast a second prompt voice to prompt the person to be measured to adjust when it is determined that the person to be measured does not meet the preset measurement standard. Optionally, the second prompt voice may be used to remind the person to be measured to take off the hat and the headband, and adjust the bang, so that the person to be measured meets the preset measurement standard.
In a possible situation, the existing infrared thermometry (for example, a forehead thermometer, etc.) needs to be manually registered to verify the identity of the person to be measured, and the body temperature of the person to be measured is recorded, so that the data recording is inconvenient to use. Therefore, the infrared temperature measuring device 10 can further comprise a communication module 17, and the main controller 11 is in communication connection with the server 20 through the communication module 17.
The main controller 11 is further configured to send the body temperature data and the face image of the person to be tested to the server 20 through the communication module 17, so that the server 20 determines the identity information of the person to be tested according to the face image, and stores the identity information and the body temperature data of the person to be tested.
Alternatively, the communication module 17 may be a WIFI network, a 3G/4G/5G network, or the like. The server 20 can perform face recognition on the face image, thereby automatically verifying the identity of the person to be tested.
Optionally, the infrared temperature measuring device 10 may further include a bracket, where the bracket is used to fix the camera module 15 and the infrared temperature sensor 12, so that the first camera and the second camera are equidistant on two horizontal sides of the infrared temperature sensor, and the camera module 15 and the infrared temperature sensor 12 are on the same vertical plane.
An infrared temperature measurement method applied to the infrared temperature measurement device 10 is provided below, and referring to fig. 3, the infrared temperature measurement method may include the following steps:
s110, the main controller controls the infrared temperature sensor to measure the forehead temperature of the person to be measured when the main controller detects that the distance between the person to be measured and the infrared temperature sensor is smaller than or equal to the preset distance and the person to be measured meets the preset measurement standard.
And S120, the main controller acquires the power supply voltage of the infrared temperature sensor measured by the analog-to-digital conversion module, and compensates the forehead temperature by using the power supply voltage to obtain the body temperature data of the person to be measured.
Optionally, step S120 may comprise the following sub-steps:
the main controller compensates the forehead temperature by using the current power supply voltage according to a preset compensation formula to obtain body temperature data;
the preset compensation formula is as follows: t1 ═ T0-K1 (VDD-V0), where T1 represents body temperature data, T0 represents rated temperature, K1 represents supply voltage influence coefficient, VDD represents current supply voltage, and V0 represents supply voltage that has no influence on body temperature data.
Optionally, on the basis of fig. 3, fig. 4 is another schematic flow chart of the infrared temperature measurement method provided in the embodiment of the present application, please refer to fig. 4, and the infrared temperature measurement method may further include step S130.
S130, the main controller obtains the current environment temperature of the person to be measured by the environment temperature sensor, and calibrates the body temperature data by using the current environment temperature to obtain calibrated body temperature data.
Optionally, step S130 may comprise the following sub-steps:
the main controller calibrates the body temperature data by using the current environmental temperature according to a preset calibration formula to obtain calibrated body temperature data;
the preset calibration formula is as follows: t2 ═ T1+ K2 × (TA-TN), where T2 denotes calibrated body temperature data, T1 denotes body temperature data, K2 denotes an ambient temperature influence coefficient, TA denotes current ambient temperature, and TN denotes ambient temperature having no influence on body temperature data.
Optionally, step S110 may comprise the following sub-steps:
the camera module collects a left image and a right image of a person to be detected and sends the left image and the right image to the main controller;
the main controller calculates the distance between the person to be measured and the infrared temperature sensor according to the left image and the right image:
the main controller compares the distance with a preset distance and controls the camera module to collect the face image of the person to be measured when the distance is less than or equal to the preset distance;
the main controller judges whether the person to be measured meets a preset measurement standard or not according to the face image, and controls the infrared temperature sensor to measure the forehead temperature of the person to be measured when the person to be measured meets the preset measurement standard.
Optionally, step S110 may further include the following sub-steps:
when the distance is larger than the preset distance, the main controller controls the loudspeaker to broadcast a first prompt voice to prompt a person to be tested to adjust the distance between the main controller and the infrared temperature sensor;
and when the main controller judges that the person to be measured does not meet the preset measurement standard, the main controller controls the loudspeaker to broadcast a second prompt voice to prompt the person to be measured to adjust.
Optionally, referring to fig. 4 again, the infrared temperature measurement method may further include step S140.
And S140, the main controller sends the body temperature data and the face image of the person to be detected to the server through the communication module, so that the server determines the identity information of the person to be detected according to the face image and stores the identity information and the body temperature data of the person to be detected.
Further, to better explain the embodiment of the present application, the following describes the infrared temperature measurement method provided by the embodiment with an application example shown in fig. 5, and as shown in fig. 5, the infrared temperature measurement method provided by the embodiment may include the following processes:
and S1, fixing the camera module and the infrared temperature sensor on the bracket.
And S2, the camera module collects the left image and the right image of the person to be detected and sends the left image and the right image to the main controller.
And S3, the main controller calculates the distance between the person to be measured and the infrared temperature sensor according to the left image and the right image.
And S4, judging whether the distance is less than or equal to 5 cm. If so, go to S5, otherwise, go to S6.
And S5, the main controller controls the camera module to collect the face image of the person to be detected.
And S6, the main controller controls the loudspeaker to broadcast the first prompt voice. Execution then continues with S2.
And S7, judging whether the person to be tested wears a hat, a headband, a bang to shield forehead and the like. If so, go to S8, otherwise, go to S9.
And S8, the main controller controls the infrared temperature sensor to measure the forehead temperature of the person to be measured.
And S9, the main controller controls the loudspeaker to broadcast a second prompt voice. Execution then continues with S2.
And S10, the main controller acquires the power supply voltage of the infrared temperature sensor measured by the analog-to-digital conversion module, and compensates the forehead temperature by using the power supply voltage to obtain the body temperature data of the person to be measured.
And S11, the main controller acquires the current environment temperature of the person to be measured by the environment temperature sensor, and calibrates the body temperature data by using the current environment temperature to obtain the calibrated body temperature data.
And S12, the main controller sends the body temperature data and the face image of the person to be detected to the server through the communication module, so that the server determines the identity information of the person to be detected according to the face image and stores the identity information and the body temperature data of the person to be detected.
It can be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific process of the infrared temperature measurement method described above may refer to the corresponding hardware function description in the foregoing system embodiment, and is not described herein again.
Compared with the prior art, the infrared temperature measuring device 10 provided by the embodiment has the following beneficial effects:
firstly, ensuring that a person to be measured is within the measuring distance of the infrared temperature sensor 12 and ensuring that the infrared temperature sensor 12 can accurately measure the temperature;
secondly, it is ensured that no shielding object is arranged on the forehead of the person to be measured, for example, no hat, headband, bang or the like is worn on the forehead, and the real temperature of the forehead of the person to be measured can be measured by the infrared temperature sensor 12;
thirdly, the current power supply voltage of the infrared temperature sensor 12 is obtained, and the rated temperature measured by the infrared temperature sensor 12 is compensated by the current power supply voltage, so that the influence of the power supply voltage offset on the temperature measurement is eliminated;
fourthly, the problem that measurement data are inaccurate due to overhigh or overlow ambient temperature is solved by acquiring the current ambient temperature and calibrating the body temperature data by using the current ambient temperature;
fifthly, the distance between the person to be measured and the infrared temperature sensor 12 is calculated through the left image and the right image collected by the camera module 15, and whether the person to be measured meets the preset measurement standard is judged through the face image collected by the camera module 15, so that the hardware integration level is high, and the cost is saved;
sixthly, the server 20 is used for automatically identifying the identity of the person to be tested, and simultaneously, the identity information and the body temperature data of the person to be tested are automatically recorded, so that the data recording and using efficiency is improved;
and seventhly, voice prompt is intelligently carried out in the whole process, manual intervention is not needed, and the infection risk of workers is reduced.
In summary, the infrared temperature measuring device and the infrared temperature measuring method provided by the application include a main controller, and an infrared temperature sensor and an analog-to-digital conversion module electrically connected with the main controller; the main controller is used for controlling the infrared temperature sensor to measure the forehead temperature of the person to be measured when the fact that the distance between the person to be measured and the infrared temperature sensor is smaller than or equal to the preset distance and the person to be measured meets the preset measuring standard is detected; the main controller is also used for acquiring the current power supply voltage of the infrared temperature sensor measured by the analog-to-digital conversion module, and compensating the forehead temperature by using the current power supply voltage to obtain the body temperature data of the person to be measured. Compare with current infrared temperature measuring device, the infrared temperature measuring device that this application provided can improve measuring degree of accuracy.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (8)
1. An infrared temperature measuring device is characterized by comprising a main controller, a camera module electrically connected with the main controller, an infrared temperature sensor electrically connected with the main controller and an analog-to-digital conversion module;
the camera module comprises a first camera and a second camera which have at least partial overlapping view-finding ranges, the first camera and the second camera are positioned on the same horizontal plane, and the camera module and the infrared temperature sensor are positioned on the same vertical plane;
the camera module is used for acquiring a left image and a right image of a person to be detected and sending the left image and the right image to the main controller;
the main controller is used for calculating the distance between the person to be measured and the infrared temperature sensor according to the left image and the right image:
the main controller is further used for comparing the distance with a preset distance and controlling the camera module to collect the face image of the person to be detected when the distance is smaller than or equal to the preset distance;
the main controller is further used for judging whether the person to be measured meets a preset measurement standard or not according to the face image, and controlling the infrared temperature sensor to measure the forehead temperature of the person to be measured when the person to be measured meets the preset measurement standard;
the main controller is further used for obtaining the current power supply voltage of the infrared temperature sensor measured by the analog-to-digital conversion module, and compensating the forehead temperature by using the current power supply voltage to obtain body temperature data of the person to be measured.
2. The infrared temperature measuring device of claim 1, wherein the main controller is further configured to compensate the forehead temperature by using the current supply voltage according to a preset compensation formula to obtain the body temperature data;
the preset compensation formula is as follows: T1-T0-K1 (VDD-V0), where T1 represents the body temperature data, T0 represents the rated temperature, K1 represents a supply voltage influence coefficient, VDD represents the current supply voltage, and V0 represents a supply voltage having no influence on the body temperature data.
3. The infrared temperature measuring device of claim 2, further comprising an ambient temperature sensor, said ambient temperature sensor being electrically connected to said main controller;
the main controller is further used for obtaining the current environment temperature of the person to be measured by the environment temperature sensor, and calibrating the body temperature data by using the current environment temperature to obtain the calibrated body temperature data.
4. The infrared temperature measuring device of claim 3, wherein the main controller is further configured to calibrate the body temperature data according to a preset calibration formula by using the current ambient temperature to obtain the calibrated body temperature data;
the preset calibration formula is as follows: t2 ═ T1+ K2 × (TA-TN), where T2 denotes the body temperature data after calibration, T1 denotes the body temperature data, K2 denotes an ambient temperature influence coefficient, TA denotes the current ambient temperature, and TN denotes an ambient temperature having no influence on the body temperature data.
5. The infrared temperature measuring device of claim 1, further comprising a speaker, said speaker being electrically connected to said main controller;
the main controller is further used for controlling the loudspeaker to broadcast a first prompt voice when the distance is larger than the preset distance so as to prompt the person to be measured to adjust the distance between the person to be measured and the infrared temperature sensor;
and the main controller is also used for controlling the loudspeaker to broadcast a second prompt voice to prompt the person to be measured to adjust when the person to be measured is judged not to meet the preset measurement standard.
6. The infrared temperature measuring device of claim 1, further comprising a communication module, wherein the main controller is in communication connection with the server through the communication module;
the main controller is further used for sending the body temperature data and the face image of the person to be tested to the server through the communication module, so that the server can determine the identity information of the person to be tested according to the face image and store the identity information and the body temperature data of the person to be tested.
7. The infrared temperature measuring device of claim 1, further comprising a bracket;
the support is used for fixing the camera module with infrared temperature sensor, so that the first camera with the second camera is equidistantly located on the two horizontal sides of infrared temperature sensor, and the camera module with infrared temperature sensor is located on the same vertical plane.
8. An infrared temperature measurement method is characterized by being applied to an infrared temperature measurement device, wherein the infrared temperature measurement device comprises a main controller, a camera module electrically connected with the main controller, an infrared temperature sensor electrically connected with the main controller and an analog-to-digital conversion module;
the infrared temperature measurement method comprises the following steps:
the camera module comprises a first camera and a second camera which have at least partial overlapping view-finding ranges, the first camera and the second camera are positioned on the same horizontal plane, and the camera module and the infrared temperature sensor are positioned on the same vertical plane;
the camera module is used for acquiring a left image and a right image of a person to be detected and sending the left image and the right image to the main controller;
the main controller is used for calculating the distance between the person to be measured and the infrared temperature sensor according to the left image and the right image:
the main controller is further used for comparing the distance with a preset distance and controlling the camera module to collect the face image of the person to be detected when the distance is smaller than or equal to the preset distance;
the main controller is further used for judging whether the person to be measured meets a preset measurement standard or not according to the face image, and controlling the infrared temperature sensor to measure the forehead temperature of the person to be measured when the person to be measured meets the preset measurement standard;
the main controller obtains the power supply voltage of the infrared temperature sensor measured by the analog-to-digital conversion module, and compensates the forehead temperature by using the power supply voltage to obtain the body temperature data of the person to be measured.
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| CN111947808B (en) * | 2020-09-16 | 2023-10-20 | 努比亚技术有限公司 | Body temperature detection method, mobile terminal and computer readable storage medium |
| CN112287798A (en) * | 2020-10-23 | 2021-01-29 | 深圳市商汤科技有限公司 | Temperature measuring method and device, electronic equipment and storage medium |
| CN113432720A (en) * | 2021-06-25 | 2021-09-24 | 深圳市迈斯泰克电子有限公司 | Temperature detection method and device based on human body recognition and temperature detection instrument |
| CN113820018A (en) * | 2021-09-13 | 2021-12-21 | 深圳市巨龙创视科技有限公司 | Temperature measurement method, device, system and medium based on infrared imaging |
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