CN215767382U - Device for contactless temperature measurement and identity recognition - Google Patents
Device for contactless temperature measurement and identity recognition Download PDFInfo
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- CN215767382U CN215767382U CN202122017385.0U CN202122017385U CN215767382U CN 215767382 U CN215767382 U CN 215767382U CN 202122017385 U CN202122017385 U CN 202122017385U CN 215767382 U CN215767382 U CN 215767382U
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- 238000009529 body temperature measurement Methods 0.000 title claims abstract description 26
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- 230000036760 body temperature Effects 0.000 abstract description 6
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Abstract
The utility model discloses a device for non-contact temperature measurement and identity recognition, and relates to the technical field of detection equipment; the temperature sensor is electrically connected with the first controller and is in one-way communication with the first controller, the vision sensor is electrically connected with the second controller and is in two-way communication with the second controller, the key unit is electrically connected with the second controller and is in one-way communication with the second controller, the second controller is electrically connected with the liquid crystal display and is in one-way communication with the liquid crystal display, and the first controller is electrically connected with the second controller and is in two-way communication with the second controller; the first controller receives and processes human body temperature data sent by the temperature sensor, the second controller receives and processes human body facial information sent by the visual sensor, and through cooperation of the two controllers, the high working efficiency and stable performance in non-contact temperature measurement and identity recognition are achieved.
Description
Technical Field
The utility model relates to the technical field of detection equipment, in particular to a device for non-contact temperature measurement and identity recognition.
Background
In the prior art, a single chip microcomputer, a temperature sensor and a display are adopted to measure the temperature of a human body, the temperature sensor is used for measuring and obtaining the temperature data of the human body, the temperature sensor sends the temperature data of the human body to the single chip microcomputer, the single chip microcomputer sends the temperature data of the human body to the display, and the display is used for displaying the temperature data. According to the technical scheme, only the temperature of the human body can be measured and known, and the condition of personnel cannot be known.
According to the technical scheme, a single chip microcomputer, a temperature sensor, a camera and a display are adopted to measure the temperature of a human body, the temperature sensor is used for measuring and obtaining the temperature data of the human body, the temperature sensor sends the temperature data of the human body to the single chip microcomputer, the single chip microcomputer sends the temperature data of the human body to the display, the camera is used for obtaining a video image of a person, the camera sends the video image of the person to the single chip microcomputer, the single chip microcomputer sends the video image of the person to the display, and the display is used for displaying the temperature data and the video image. According to the technical scheme, the human body temperature can be measured and the video images of the personnel can be obtained, but one single chip microcomputer not only processes the images but also processes the temperature data, so that the whole working efficiency of the device is low and the performance is unstable.
Problems with the prior art and considerations:
the technical problems of low working efficiency and unstable performance in non-contact temperature measurement and identity recognition are solved.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a device for contactless temperature measurement and identity recognition, and solves the technical problems of low working efficiency and unstable performance in contactless temperature measurement and identity recognition.
In order to solve the technical problems, the technical scheme adopted by the utility model is as follows: the utility model provides a device for contactless temperature measurement and identification is including temperature sensor and the first controller that is used for obtaining human temperature data, visual sensor and second controller, button unit and the LCD that are used for obtaining human facial information, temperature sensor is connected and one-way communication with first controller electricity, visual sensor is connected and two-way communication with the second controller electricity, button unit is connected and one-way communication with the second controller electricity, the second controller is connected and one-way communication with the LCD electricity, first controller is connected and two-way communication with the second controller electricity, temperature sensor is infrared temperature sensor.
The further technical scheme is as follows: the first controller and the second controller are both 32-bit single-chip microcomputers.
The further technical scheme is as follows: the liquid crystal display is a TFTLCD display screen.
The further technical scheme is as follows: the intelligent management system further comprises a communication device and a terminal for management, the second controller is electrically connected with and communicates with the communication device, and the terminal is connected with and communicates with the communication device.
The further technical scheme is as follows: the communication device is a wireless communication device, the terminal is a mobile terminal, and the mobile terminal is in wireless connection with the wireless communication device.
Adopt the produced beneficial effect of above-mentioned technical scheme to lie in:
first, a device for contactless temperature measurement and identification is including temperature sensor and the first controller that is used for obtaining human temperature data, visual sensor and second controller, button unit and the LCD that is used for obtaining human facial information, temperature sensor is connected and one-way communication with first controller electricity, visual sensor is connected and two-way communication with the second controller electricity, button unit is connected and one-way communication with the second controller electricity, the second controller is connected and one-way communication with the LCD electricity, first controller is connected and two-way communication with the second controller electricity, temperature sensor is infrared temperature sensor. According to the technical scheme, the first controller receives and processes human body temperature data sent by the temperature sensor, the second controller receives and processes human body facial information sent by the visual sensor, the first controller and the second controller are connected and communicated in a serial port mode, the second controller is a main controller, and through cooperation of the two controllers, the high working efficiency and stable performance in non-contact temperature measurement and identity recognition are achieved.
And secondly, the first controller and the second controller are both 32-bit single-chip microcomputers. According to the technical scheme, the single chip microcomputer is adopted, so that the performance price is good, and the performance is stable.
Thirdly, the liquid crystal display is a TFTLCD display screen. According to the technical scheme, the TFTLCD display screen is adopted, the whole size of the product is small, energy consumption is low, and the face condition of a person can be observed conveniently.
And fourthly, the intelligent management system further comprises a communication device and a terminal for management, wherein the second controller is electrically connected with and communicates with the communication device, and the terminal is connected with and communicates with the communication device. According to the technical scheme, the field situation can be known in time through the terminal, and management is facilitated.
Fifthly, the communication device is a wireless communication device, the terminal is a mobile terminal, and the mobile terminal is in wireless connection with the wireless communication device. According to the technical scheme, the mobile terminal is adopted, so that the mobile office is convenient, and the management and the use are more convenient.
See detailed description of the preferred embodiments.
Drawings
FIG. 1 is a schematic block diagram of embodiment 1 of the present invention;
FIG. 2 is a schematic block diagram of embodiment 2 of the present invention;
fig. 3 is a schematic block diagram of embodiment 3 of the present invention.
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, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the application, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application, but the present application may be practiced in other ways than those described herein, and it will be apparent to those of ordinary skill in the art that the present application is not limited to the specific embodiments disclosed below.
Example 1:
as shown in figure 1, the utility model discloses a device for contactless temperature measurement and identity recognition, which comprises a temperature sensor and a first controller for obtaining human body temperature data, a visual sensor and a second controller for obtaining human body facial information, a key unit and a liquid crystal display, wherein the temperature sensor is electrically connected with the first controller and is in one-way communication, the visual sensor is electrically connected with the second controller and is in two-way communication, the key unit is electrically connected with the second controller and is in one-way communication, the second controller is electrically connected with the liquid crystal display and is in one-way communication, and the first controller is electrically connected with the second controller and is in two-way communication.
The first controller is 32-bit single chip microcomputer, model STM32F103C8T6, the second controller is 32-bit single chip microcomputer, model STM32H750VIT 6.
The temperature sensor is an infrared temperature sensor.
The liquid crystal display is a TFTLCD display screen.
The temperature sensor, the first controller, the visual sensor, the second controller, the key unit, the liquid crystal display and the corresponding communication connection technology are not described herein in detail for the prior art.
Example 2:
embodiment 2 is different from embodiment 1 in that the mobile terminal further includes a wireless communication device and a mobile terminal for management, the second controller is electrically connected to and communicates with the wireless communication device, the mobile terminal is a smart phone, and the mobile terminal is wirelessly connected to and communicates with the wireless communication device.
As shown in fig. 2, the present invention discloses a device for contactless temperature measurement and identity recognition, which comprises a temperature sensor and a first controller for obtaining human body temperature data, a visual sensor and a second controller for obtaining human body facial information, a key unit, a liquid crystal display, a wireless communication device and a mobile terminal for management, wherein the temperature sensor is electrically connected with the first controller and is in one-way communication, the visual sensor is electrically connected with the second controller and is in two-way communication, the key unit is electrically connected with the second controller and is in one-way communication, the second controller is electrically connected with the liquid crystal display and is in one-way communication, and the first controller is electrically connected with the second controller and is in two-way communication.
The second controller is electrically connected with and communicates with the wireless communication device, the mobile terminal is a smart phone, and the mobile terminal is wirelessly connected with and communicates with the wireless communication device.
The first controller is 32-bit single chip microcomputer, model STM32F103C8T6, the second controller is 32-bit single chip microcomputer, model STM32H750VIT 6.
The temperature sensor is an infrared temperature sensor.
The liquid crystal display is a TFTLCD display screen.
The temperature sensor, the first controller, the visual sensor, the second controller, the key unit, the liquid crystal display, the wireless communication device, the smart phone and the corresponding communication connection technology are not described herein again for the prior art.
Example 3:
embodiment 3 differs from embodiment 2 in that the mobile terminal is a tablet computer.
As shown in fig. 3, the present invention discloses a device for contactless temperature measurement and identity recognition, which comprises a temperature sensor and a first controller for obtaining human body temperature data, a visual sensor and a second controller for obtaining human body facial information, a key unit, a liquid crystal display, a wireless communication device and a mobile terminal for management, wherein the temperature sensor is electrically connected with the first controller and is in one-way communication, the visual sensor is electrically connected with the second controller and is in two-way communication, the key unit is electrically connected with the second controller and is in one-way communication, the second controller is electrically connected with the liquid crystal display and is in one-way communication, and the first controller is electrically connected with the second controller and is in two-way communication.
The second controller is electrically connected with and communicates with the wireless communication device, the mobile terminal is a tablet computer, and the mobile terminal is wirelessly connected with and communicates with the wireless communication device.
The first controller is 32-bit single chip microcomputer, model STM32F103C8T6, the second controller is 32-bit single chip microcomputer, model STM32H750VIT 6.
The temperature sensor is an infrared temperature sensor.
The liquid crystal display is a TFTLCD display screen.
The temperature sensor, the first controller, the visual sensor, the second controller, the key unit, the liquid crystal display, the wireless communication device, the tablet computer and the corresponding communication connection technology are not described herein again for the prior art.
The utility model of the present application is directed to the combination of devices and not to the improvement of method steps.
Description of the technical solution:
the device for contactless temperature measurement and identity identification is a hardware system.
One, non-contact temperature measurement and identity recognition system overall design scheme
The system mainly comprises a control system of the device, wherein the control system of the device is composed of a core control STM32H750VIT6, an STM32F103C8T6, an MLX90614 infrared temperature sensor, an OpenMV machine vision module, an LCD resistance liquid crystal screen module and a key module, and can be used for measuring the temperature of a human body in a non-contact manner, identifying the identity of a person, wearing a mask or not and displaying information on a screen.
1.1 selection of Components
The STM32 core controller that this design mainly used is STM32F103C8T6, and is more powerful than conventional 51 single chip microcomputer chips in function, can realize that the time of these two kinds of chip development of more functions is early, and it is fast to hand, and the data is complete, and the development of being convenient for can realize required function basically, so selected this kind of core controller.
The identity recognition adopts an OpenMV machine vision module. The OpenMv and the STM32 establish serial port communication, and when the OpenMV machine vision module captures and processes the picture of the object to be tested, the picture is transmitted to the STM32 core controller through the serial port communication. When the detected person does not wear the mask, the detected person is displayed on the LCD screen.
In the function of temperature measurement, an MLX90614 infrared temperature measurement module is adopted, communication is established with an STM32 through an I2C bus, and the I2C communication mode has the advantages of high transmission speed and stable transmission, and the requirement of transmitting temperature information in real time must be met. The display screen utilized a 1.77 inch LCD screen.
1.2 Overall Block diagram design of contactless temperature measurement and identity recognition System
Referring to fig. 1, a schematic block diagram of a contactless temperature measurement and identity recognition system is shown according to the system operation principle.
According to the principle block diagram of the system, the hardware of the system is STM32H750VIT6 used for processing OpenMv data and displaying the OpenMv data on an LCD display screen, the STM32F103C8T6 minimum system is connected through a serial port, and C8T6 receives temperature sensor data and displays the temperature sensor data on the screen.
Hardware design of non-contact temperature measurement and identity recognition system
The system takes STM32F103C8T6 as a main controller, and the main modules comprise an OpenMv vision module, namely a vision sensor, a temperature sensor module, namely a temperature sensor, an LCD display screen module, namely a display, and a key module, namely a key unit.
2.1 design of minimum System of Single chip
STM32F103C8T6 is a 32-bit micro system controller based on ARM Cortex-M kernel technology, the capacity of an internal control program for a storage environment is 64KB, the power supply voltage is between 2V and 3.6V, and the micro system controller can normally work at the temperature of between 40 ℃ below zero and 85 ℃. Compared with a conventional 51-chip microcomputer chip, the chip has stronger functions, can realize more functions, is developed in a short time, is fast to operate, has complete data, is convenient to develop, and can basically realize the required functions, so that the core controller is selected.
The first controller, the minimum system of the single chip microcomputer comprise a reset circuit, a clock circuit, a power circuit and four capacitors as protection circuits. The temperature sensor is a 32-bit microcontroller based on an ARM core, the flash capacity of a program memory of the microcontroller is 64KB, the flash capacity of the program memory is 20KB, and the chip is used for processing data of the temperature sensor and displaying the data on a screen in real time.
The system in the device is connected with the ov7725 camera and used as a data processing chip of the camera, the data processing chip comprises image processing, color processing, facial feature processing and face learning function processing, the functions are realized by calling library functions in OpenMv and using simple python programming, and the single chip microcomputer system is powerful in function, is usually used for completing design contents of complex functions and is a common chip of OpenMv.
2.2MLX90614 Infrared temperature sensor Circuit design
Introduction to 2.2.1MLX90614 Infrared temperature sensor
MLX90614 is a commonly used infrared thermometry module. The device can be used for carrying out inspection and linearization work before leaving a factory, and has the advantages of no contact, small volume, high precision, low required cost and the like. The single-channel output is used for measuring the surface temperature of a target and other environmental temperatures, and the single-channel output also has two interfaces for providing output, and can be applied to automobile air conditioners, household heating, household electrical appliance products, handheld electronic equipment and medical equipment. Besides two types of 80 degrees and 100 degrees, the device also has other FOV types, the measured temperature range is-70-380 ℃, the periphery is large, the use range is wide, 5v and 3v power supplies can be selected on the configuration, FIR and IIR filtering can be realized simultaneously, and the programming range of PWM frequency is between 1Hz and 1 kHz.
2.2.2MLX90614 infrared temperature sensor working principle
The surface temperature of the object may have some effect on the magnitude of the infrared energy and the distribution of wavelengths. Therefore, in order to accurately calculate the surface temperature, it is possible to detect the infrared value of the object itself, and thus, there is an application of infrared thermometry. The optical system, the signal amplifier, the signal processing module, the photoelectric detector, the output module and the like form the infrared thermometer. In digital pulse width modulation, the duty cycle is changed by changing the ratio of high and low levels, and the control signal is digital. PWM control circuits are mostly arranged in control circuits such as alternating current motor frequency conversion, direct current motor frequency adjustment, switching regulator power supply and the like.
The data read in MLX90614 is 16 bits, consisting of eight lower bits and eight upper bits, where the TOBJ1 data is stored in the RAM address 07H cell, the data ranges from 0x27AD to 0x7FFF, corresponding to a temperature range of-70.01 ℃ to +382.19 ℃.
The model of the infrared temperature sensor is MLX 90614.
2.3 face recognition Module Circuit design
2.3.1OpenMv Vision sensor introduction
The vision sensor OpenMv is a low-cost, powerful and open-source vision module supporting Python programming, is a very common language, and is widely used in image processing, machine learning and network programming. And Python is a very easy to use language, which is easier to use if there are other language programming bases. OpenMv contains a large number of library function algorithms inside, and some routines can be referred and learned by users, which can realize many functions, and users only need to call some library functions and can realize some visual functions through uncomplicated python language, such as car tracking, color block recognition, feature point detection, distance measurement, color recognition, garbage classification, mask recognition, face recognition, and the like. The design uses the functions of mask recognition and face recognition.
The advantage that the vision sensor OpenMV uses Python language is simple to operate, the application and release of a memory are not considered, and a plurality of MicroPython libraries can be directly used.
2.3.2OpenMv visual sensor working principle
The visual sensor OpenMV is a visual module integrated with a camera supporting Python on an STM32 controller. It can perform color recognition by means of the image recognition algorithm library function of Python. The system is controlled through the I/O port and the collected signals are sent to other controllers through the serial port.
The resolution of the Ov7725 sensor in the visual sensor was 640 x 480 and 300000 pixels. It processes either 8-bit grayscale images or 16-bit RGB565 color images. The image sensor converts the optical signal into an electrical signal, converts the electrical signal into a digital signal through the AD converter, sends the processed digital image signal to the DSP digital algorithm processing chip, and receives image data from the image sensor by using the FIFO memory.
The system sends a trigger pulse to the image collector. The image collector sends a start pulse to the image sensor OV7725 photosensitive element according to the time delay set by the program. The OV7725 photosensor will initiate a full frame scan upon receiving the start pulse. After the photosensitive element is exposed, it will be scanned formally and output a frame image. OpenMV has a built-in AD conversion module. In the image acquisition section, digital images are stored in a FIFO memory and a digital processing chip DSP is used to process, analyze and identify the images being taken to obtain measurement studies or logic system control values.
The human face operator built in the vision sensor OpenMv is manufactured by a data set which is full of Europe and America such as nationality, the human face characteristics of the human face operator are greatly different from those of Asians, and the human face operator is most obviously different from the Asians in the stereoscopic impression of the human face. This results in that the face recognition rate of most flat asian faces is not as high as that of most stereoscopic europe and america faces if there is no strong forward fill light during recognition. In the system, if the problem is solved, the white and three-dimensional degree of the human face is adjusted by polishing or increasing the exposure time.
2.3 design of LCD Screen
The system adopts a 1.77-inch TFTLCD display screen, the resolution is 128 multiplied by 160, the working voltage is 3.3V, and the working temperature is minus 20 ℃ to 70 ℃.
After the LCD display screen that this design used was electrified, the main control chip can carry out initialization processing to the data of LCD display screen, can detect every parameter more directly perceived obvious demonstration on the display screen, adjust the screen through independent button and demonstrate different control mode, use the device's various functions, make the user can be more convenient observation surveyed people's identity information and temperature and whether wear the gauze mask.
Compared with the embodiment, the power supply unit is in power supply connection with the first controller and the second controller.
Claims (5)
1. A device for contactless temperature measurement and identification, characterized by: including temperature sensor and the first controller that is used for obtaining human temperature data, the vision sensor and the second controller that are used for obtaining human facial information, button unit and LCD, temperature sensor is connected and unidirectional communication with the first controller electricity, vision sensor is connected and bidirectional communication with the second controller electricity, button unit is connected and unidirectional communication with the second controller electricity, the second controller is connected and unidirectional communication with the LCD electricity, first controller is connected and bidirectional communication with the second controller electricity, temperature sensor is infrared temperature sensor.
2. The device for contactless temperature measurement and identification according to claim 1, characterized in that: the first controller and the second controller are both 32-bit single-chip microcomputers.
3. The device for contactless temperature measurement and identification according to claim 1, characterized in that: the liquid crystal display is a TFTLCD display screen.
4. The device for contactless temperature measurement and identification according to claim 1, characterized in that: the intelligent management system further comprises a communication device and a terminal for management, the second controller is electrically connected with and communicates with the communication device, and the terminal is connected with and communicates with the communication device.
5. The device for contactless temperature measurement and identification according to claim 4, characterized in that: the communication device is a wireless communication device, the terminal is a mobile terminal, and the mobile terminal is in wireless connection with the wireless communication device.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202122017385.0U CN215767382U (en) | 2021-08-25 | 2021-08-25 | Device for contactless temperature measurement and identity recognition |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202122017385.0U CN215767382U (en) | 2021-08-25 | 2021-08-25 | Device for contactless temperature measurement and identity recognition |
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