CN111035370A - Body temperature and video image monitoring system - Google Patents
Body temperature and video image monitoring system Download PDFInfo
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- CN111035370A CN111035370A CN202010179269.6A CN202010179269A CN111035370A CN 111035370 A CN111035370 A CN 111035370A CN 202010179269 A CN202010179269 A CN 202010179269A CN 111035370 A CN111035370 A CN 111035370A
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/01—Measuring temperature of body parts ; Diagnostic temperature sensing, e.g. for malignant or inflamed tissue
- A61B5/015—By temperature mapping of body part
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/0002—Remote monitoring of patients using telemetry, e.g. transmission of vital signals via a communication network
- A61B5/0004—Remote monitoring of patients using telemetry, e.g. transmission of vital signals via a communication network characterised by the type of physiological signal transmitted
- A61B5/0008—Temperature signals
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/74—Details of notification to user or communication with user or patient ; user input means
- A61B5/746—Alarms related to a physiological condition, e.g. details of setting alarm thresholds or avoiding false alarms
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
- H04N7/183—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast for receiving images from a single remote source
Abstract
The invention discloses a body temperature and video image monitoring system, which comprises a camera with a non-contact body temperature monitoring function, a multi-probe multi-point non-contact body temperature monitor, video processing terminal equipment and a background manager, wherein the camera is connected with the back end of a back; the video processing terminal equipment receives body temperature data and video image data of a camera with a non-contact body temperature monitoring function or body temperature data of a multi-probe multi-point non-contact body temperature monitor, captures a human face head portrait picture of a door, superimposes a corresponding body temperature value with time and positioning data, stores the human face head portrait picture and the corresponding body temperature value in a local memory together with video data, sends the human face head portrait picture to a background manager through a wireless network for storage and corresponding processing when a network exists, and automatically alarms to prompt a manager or a driver to perform protection and processing according to a specified requirement if the body temperature exceeds a set value. The invention automatically measures the body temperature of each person who comes in and goes out, automatically reminds when the body temperature is abnormal, and greatly facilitates the prevention and control work of a plurality of crossing where the person comes in and goes out.
Description
Technical Field
The invention relates to the technical field of security and protection monitoring, in particular to a body temperature and video image monitoring system.
Background
Since new coronavirus abuse, intelligent systems and devices for controlling epidemic situations are particularly important, especially in public transport systems, which have a large impact area and are troublesome for tracing people in contact with the system. Currently, due to the limitation of equipment and systems, most occasions can be eliminated only by using a handheld infrared forehead thermometer at a bayonet by a worker, so that the elimination difficulty and the benefit are high for public transport means such as buses and taxis, and particularly the elimination is a serious challenge in rush hours.
Disclosure of Invention
In view of the above, in order to solve the above problems in the prior art, the present invention provides a body temperature and video image monitoring system, which has the feature of combining automatic body temperature monitoring with video images.
The invention solves the problems through the following technical means:
a body temperature and video image monitoring system comprising:
the camera with the non-contact body temperature monitoring function is used for acquiring body temperature data and video image data of people entering and exiting in a non-contact manner and uploading the body temperature data and the video image data to the video processing terminal equipment;
the multi-probe multi-point non-contact body temperature monitor is used for measuring the body temperature of one person in different body positions or multiple persons simultaneously by adopting a non-contact mode and uploading measured body temperature data to video processing terminal equipment;
the video processing terminal equipment receives body temperature data and video image data of a camera with a non-contact body temperature monitoring function or body temperature data of a multi-probe multi-point non-contact body temperature monitor, captures a human face head portrait picture of a door, superimposes a corresponding body temperature value with time and positioning data, stores the human face head portrait picture and the time and positioning data in a local memory together with video data, sends the human face head portrait picture to a background manager through a wireless network for storage and corresponding processing when a network exists, and automatically alarms to prompt a manager or a driver to perform protection and processing according to a specified requirement if the body temperature exceeds a set value;
the background manager receives the data sent by the video processing terminal equipment, monitors and stores the data, and plays back, analyzes and counts the personnel and the related data when abnormity or epidemic situation occurs; or the data stored on the video processing terminal equipment which is not connected with the network is processed in the same way by the importing mode.
Further, the camera with the non-contact body temperature monitoring function comprises:
the image sensor is used for acquiring video image data of people entering and exiting and sending the video image data to the first central processing unit for processing;
the first infrared thermopile temperature sensor is used for converting absorbed human body infrared radiation into heat energy by utilizing the principle that the radiation energy of an object changes along with the temperature, converting the temperature change into an electronic signal, amplifying the output signal by an AD operational amplifier, sending the amplified output signal to a first central processing unit for processing and calculating, and outputting a body temperature value;
the first thermistor is used for compensating the measured value of the thermopile according to the NTC feedback value by utilizing the characteristic that the resistance value of the thermistor changes along with the change of the environmental temperature, so that the accuracy of the measured value is improved;
a first distance sensor: the first central processing unit is used for obtaining the parameters of the distance between the person and the person, and when the body temperature value is calculated by the first central processing unit, the parameters of the distance are increased for compensation, so that the accuracy of the calculated body temperature value is improved;
the first central processing unit has image processing and data acquisition and calculation functions, and is used for reading output values of the infrared thermopile sensor and the distance sensor after recognizing a face image through an infrared and image recognition algorithm and calculating a body temperature value of a current measured person through a thermistor feedback value; the calculated body temperature value is directly superposed on a video image or is output to a received video processing terminal device in a serial port, CAN or wireless data transmission mode; if the output of the video image of the camera is an analog signal, the body temperature value is directly superposed on the video signal through a modulation circuit and sent out together, and then the corresponding body temperature value is demodulated by the video processing terminal equipment; if the output of the camera video image is digital, the body temperature value is directly superposed on the image data according to the protocol and is sent out, and then the data of the body temperature value is resolved by the video processing terminal equipment according to the protocol;
and the first output interface is used for uploading the body temperature data and the video image data to the video processing terminal equipment in a serial port, CAN, wireless data transmission or video data superposition mode.
Further, the multi-probe multi-point non-contact body temperature monitor comprises:
the second infrared thermopile temperature sensor is used for converting absorbed human body infrared radiation into heat energy by utilizing the principle that the radiation energy of an object changes along with the temperature, converting the temperature change into an electronic signal, amplifying the output signal by an AD operational amplifier, sending the amplified output signal to a processor for processing and calculating, and outputting a body temperature value;
a second thermistor: the device is used for compensating the measured value of the thermopile according to the NTC feedback value by utilizing the characteristic that the resistance value of the thermistor changes along with the change of the environmental temperature, so that the accuracy of the measured value is improved;
a second distance sensor: the distance parameter is added for compensation when the processor calculates the body temperature value, so that the accuracy of the calculated body temperature value is improved;
the processor is used for receiving an instruction of the video processing terminal equipment, circularly reading output values of different infrared thermopile sensors and distance sensors and thermistor feedback values, calculating the body temperature value of each current probe corresponding to a tested person or position, and outputting the body temperature value to the received video processing terminal equipment in a serial port, CAN or wireless data transmission mode;
and the second output interface is used for uploading the body temperature data to the video processing terminal equipment in various modes of serial port, CAN and wireless data transmission.
Further, the video processing terminal device includes:
the video memory is used for storing video and picture data, recording multiple paths of videos in real time and independently, and playing back the videos on equipment or a PC (personal computer) when needed;
the program memory is used for storing a program file for data processing of the second central processing unit;
the memory is used for storing various data generated during the data processing of the second central processing unit;
the power management module is used for managing the power of the equipment, acquiring control signals, and ensuring that the equipment is started and shut down in a correct functional state and supplies power to the camera and the external equipment of the body temperature monitor;
the coprocessor is used for receiving data of the serial port and the CAN bus and a control command of the infrared remote controller from the interface, carrying out corresponding processing action, and transmitting a related instruction to the second central processing unit for corresponding function processing when required; the coprocessor monitors the working state of the second central processing unit, and resets the second central processing unit when the second central processing unit is abnormal so as to ensure that the second central processing unit can normally carry out video coding and decoding processing for a long time;
the analog-to-digital converter is used for receiving video signals from the analog video input interface and converting the video signals into standard digital signals for the camera with the front end being analog signals, and then sending the standard digital signals to the second central processing unit for encoding, previewing, compressing and storing; for the camera with digital signal output, the received signal is sent to the second CPU for coding, previewing, compressing and storing;
the second central processing unit adopts a dual-core processor, is a core component of the video processing terminal equipment, and is used for capturing the image of the person, overlaying the body temperature data to the image, compressing the image to generate the image and storing the image, storing the body temperature and other image related data into file information, and performing coding compression, storage and related operation and processing on the video image data and transmitting the video image data to the background manager;
and the external interface comprises a video interface, a serial port, a CAN or wireless data transmission interface and is used for receiving the body temperature measurement value and the video image data sent by the camera or the independent body temperature monitor.
Further, the calculation method of the body temperature of the first central processing unit specifically includes:
the following relationship exists between the measured temperature and the ambient temperature:
Vout=S(T1-T2)；
vout is the output voltage of the thermopile; s is a proportional system; t1 is the temperature of the tested person; t2 is the current ambient temperature;
the first central processing unit calculates a quantized value according to an input reference voltage value and the resolution digit of the ADC corresponding to the thermopile access, and the quantized value is multiplied by the conversion value of the ADC to obtain a measured value T3 of the temperature;
the measured value of the normal body temperature is within the small range of 35-42 ℃, the measuring range is controlled to be 0-150 CM, a two-dimensional correction coefficient table is established in a program according to the characteristics of the body temperature values and the distances measured by different thermopile probes, and after the body temperature value is measured by the processor, the measured value is corrected according to the corresponding correction coefficient Y to obtain the final body temperature value: t4 = Y (T3).
Furthermore, the first central processing unit adopts a MCU + DSP dual processor, the MCU is independent from the DSP, the DSP processes video image data, and the MCU processes body temperature data.
Furthermore, the first central processing unit adopts an enhanced DSP processor with AD and communication ports to process and output the video image data and the body temperature data together.
Further, the specific flow of video overlay of the second central processing unit is as follows:
the body temperature and positioning data are input into the body temperature, the dot matrix buffer area of the positioning data is input into the video buffer area, a program is started, the starting position of data superposition is determined according to the length and the width of an image and the pixel bit depth, the superposition operation of image + information is carried out on the body temperature positioning data and image data of a corresponding area according to the set transparency of superposition information, the video data after the body temperature and the positioning data are superposed has two processing modes, JPEG compression is called for the first time to be stored into a JPG picture, the JPG picture is sent to a background server or stored into a local storage, and H.265/264 or MPEG compression algorithm is called for the second time to generate a compressed video stream, and the compressed video stream is sent to.
Further, the second central processing unit adopts an ARM + DSP dual-core processor.
Compared with the prior art, the invention has the beneficial effects that at least:
the invention can capture pictures of each passenger getting on the bus and automatically measure the body temperature, then automatically superimposes the body temperature value of each person and the getting on point on the image and stores the body temperature value and the getting on point, and automatically reminds the passenger and the driver when the body temperature of the passenger getting on the bus is abnormal, so that the driver requires the passenger to be protected or to do related treatment according to the regulations. If a subsequent case occurs, the passengers on the same bus can be traced through the stored video images, and great convenience is brought to prevention and control work of public transport means such as buses, taxis and the like.
The invention can also be applied to the conventional security monitoring, in particular to the monitoring of the entrances and exits of buildings, districts or crossings with more entrances and exits of other people.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a topological structure diagram of a body temperature and video image monitoring system according to the present invention;
FIG. 2 is a schematic structural diagram of a camera with a non-contact body temperature monitoring function according to the present invention;
FIG. 3 is a graph of the temperature characteristic of a first infrared thermopile temperature sensor of the present invention;
FIG. 4 is a schematic circuit diagram of the first infrared thermopile temperature sensor of the present invention with its output amplified by AD operation and then outputted to the first CPU;
FIG. 5 is a graph of temperature versus resistance of a first thermistor according to the present invention;
FIG. 6 is a block circuit diagram of the ambient temperature of the first thermistor of the present invention;
FIG. 7 is a graph of voltage distribution versus temperature for a first thermistor of the present invention;
FIG. 8 is a schematic structural view of a multi-probe multi-point non-contact body temperature monitor according to the present invention;
fig. 9 is a schematic structural diagram of the video processing terminal device of the present invention.
Fig. 10 is a flow chart of the second central processor video overlay of the present invention.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. It should be noted that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by those skilled in the art without any inventive work based on the embodiments of the present invention belong to the protection scope of the present invention.
Example 1
As shown in fig. 1, the present invention provides a body temperature and video image monitoring system, which includes:
the camera with the non-contact body temperature monitoring function is used for acquiring body temperature data and video image data of people entering and exiting in a non-contact manner and uploading the body temperature data and the video image data to the video processing terminal equipment;
the multi-probe multi-point non-contact body temperature monitor is used for measuring the body temperature of one person in different body positions or multiple persons simultaneously by adopting a non-contact mode and uploading measured body temperature data to video processing terminal equipment;
the video processing terminal equipment receives body temperature data and video image data of a camera with a non-contact body temperature monitoring function or body temperature data of a multi-probe multi-point non-contact body temperature monitor, captures a human face head portrait picture of a door, superimposes a corresponding body temperature value with time and positioning data, stores the human face head portrait picture and the time and positioning data in a local memory together with video data, sends the human face head portrait picture to a background manager through a wireless network for storage and corresponding processing when a network exists, and automatically alarms to prompt a manager or a driver to perform protection and processing according to a specified requirement if the body temperature exceeds a set value;
the background manager receives the data sent by the video processing terminal equipment, monitors and stores the data, and plays back, analyzes and counts the personnel and the related data when abnormity or epidemic situation occurs; or the data stored on the video processing terminal equipment which is not connected with the network is processed in the same way by the importing mode.
Description of system components:
1. camera that possesses non-contact body temperature monitoring function: the infrared body temperature measuring function is added on the basis of the design of the current traditional analog or digital camera. In order to ensure that the body temperature monitoring value is more accurate, the invention not only has an infrared thermopile sensor, but also has a distance measuring sensor and a thermosensitive sensor. According to different data receiving modes of the video processing terminal equipment, the measured value of the body temperature CAN be superposed into video image data and transmitted to the video processing terminal equipment, or transmitted to the video processing terminal equipment through serial ports, CAN, wireless data transmission and other transmission modes, so that the application requirements of upgrading of the video processing terminal equipment with different interfaces and old systems are met.
2. Multi-probe multi-point non-contact body temperature monitor: a plurality of sensors networking combination is in the same place, to the condition that unexpected many people got on the bus simultaneously, installs the position that the gate faced the car of getting on, can measure many people to alone different positions or simultaneously. The transmission of body temperature data is like a camera, and the measured value of the body temperature is sent to the video processing terminal equipment through the serial port, CAN or wireless data transmission and other transmission modes according to different data receiving modes of the video processing terminal equipment according to protocols so as to adapt to the application requirements of upgrading of video terminal equipment with different interfaces and old systems.
3. Video processing terminal equipment: the system receives the image and the body temperature data of a camera with a temperature monitoring function or the body temperature data of a multi-probe non-contact type body temperature monitor, captures a human face head portrait picture of a door, superposes a corresponding body temperature value with time and positioning data, stores the body temperature value, the time and the positioning data together with video data in a local memory, sends the image and the body temperature value to a background manager through a wireless network for storage and other corresponding processing, and automatically alarms and prompts a manager or a driver to protect and process according to a specified requirement if the body temperature exceeds a set value.
4. A background manager: and receiving data sent by the video processing terminal equipment, monitoring, storing and the like, and when an abnormality or epidemic situation occurs, performing relevant processing such as playback, analysis, statistics and the like on personnel and other relevant data. The data stored on the video processing terminal equipment which is not connected with the network can also be processed in an importing mode.
Example 2
As shown in fig. 2, in this embodiment, on the basis of embodiment 1, the camera with a non-contact body temperature monitoring function further includes:
first infrared thermopile temperature sensor (Infra Red thermal detector): the principle that the radiation energy of an object changes along with the temperature is utilized, the absorbed infrared radiation of a human body is converted into heat energy, the temperature change is converted into an electronic signal, the output signal is amplified by an AD operational amplifier and then sent to a first central processing unit for processing and calculation, and then a body temperature value is output; fig. 3 is a temperature characteristic curve of the first infrared thermopile sensor, the output of the first infrared thermopile sensor is amplified by an AD operation and then output to an ADC of the first central processing unit, and a circuit schematic diagram is shown in fig. 4, in which the first central processing unit calculates a quantized value (LSB) according to an input reference voltage value and a resolution bit number (16 bits) of the ADC, and reads a measured and calculated value of the current body temperature according to a performance curve parameter of the first infrared thermopile sensor (T1).
A first NTC thermistor: because the environment temperature can influence the temperature measurement value of the thermopile, the first central processing unit compensates the measurement value of the thermopile according to the NTC feedback value by utilizing the characteristic that the resistance value of the thermistor changes along with the change of the environment temperature, so that the accuracy of the measurement value is improved; the manufacturer of the first NTC thermistor provides a temperature-resistance curve similar to that of fig. 5, a circuit diagram of the ambient temperature is shown in fig. 6, a voltage distribution value-temperature relationship of the first NTC thermistor is shown in fig. 7, and a calculation algorithm is as follows:
vout = Vin × Rntc/(Rntc + R); the first central processing unit calculates a quantized value (LSB) according to the input reference voltage value and the resolution bit number (10 bits) of the ADC, and multiplies the read parameter to calculate the current environment temperature value (T2).
A first distance sensor: similarly, when the infrared thermopile sensor measures the body temperature, the measured value is greatly influenced by the distance, so when the first central processing unit calculates the body temperature value, the distance parameter needs to be increased for compensation, and the calculated body temperature value is accurate;
a first central processor: the intelligent human body temperature measuring instrument has the functions of image processing and data acquisition and calculation, and after the processor recognizes a human face image through an infrared and image recognition algorithm, the processor reads output values of an infrared thermopile sensor and a distance sensor and a thermistor feedback value to calculate the body temperature value of a current measured person. The calculated body temperature value CAN be directly superposed on a video image, and CAN also be output to a receiving back-end device through transmission modes such as a serial port, CAN or wireless data transmission and the like. If the output of the video image of the camera is an analog signal, the body temperature value can be directly superposed on the video signal through the modulation circuit and sent out together, and then the receiving end demodulates the corresponding body temperature value. If the output of the camera video image is digital, the body temperature value can be directly superposed on the image data according to the protocol and sent out, and then the data of the body temperature value is resolved by the receiving end according to the protocol. The first central processing unit has two types, one type adopts an MCU + DSP dual processor, the MCU and the DSP are independent, the DSP processes video image data, and the MCU processes body temperature data; the other is to adopt an enhanced DSP processor with AD and communication ports to process and output the video image data and the body temperature data together.
The method for calculating the body temperature of the first central processing unit comprises the following specific steps:
the following relationship exists between the measured temperature and the ambient temperature:
Vout=S(T1-T2)；
vout is the output voltage of the thermopile; s is a proportional system; t1 is the temperature of the tested person; t2 is the current ambient temperature;
the first central processing unit calculates a quantized value (LSB) according to an input reference voltage value and the resolution digit (10 digits) of the ADC connected to the thermopile, and multiplies the quantized value by the conversion value of the ADC to obtain a measured value T3 of the temperature;
the measured value of the normal body temperature is within the small range of 35-42 ℃, the measuring range is controlled to be 0-150 CM, a two-dimensional correction coefficient table is established in a program according to the characteristics of the body temperature values and the distances measured by different thermopile probes, and after the body temperature value is measured by the processor, the measured value is corrected according to the corresponding correction coefficient Y to obtain the final body temperature value: t4 = Y (T3).
A first output interface: and a plurality of modes such as serial ports, CAN, wireless data transmission, video data superposition and the like are selected by a user so as to adapt to different back-end equipment.
Example 3
As shown in fig. 8, the multi-probe multi-point non-contact body temperature monitor according to the present embodiment further includes:
second infrared thermopile temperature sensor (Infra Red thermal detector): the principle that the radiation energy of an object changes along with the temperature is utilized, the absorbed infrared radiation of a human body is converted into heat energy, the temperature change is converted into an electronic signal, the output signal is amplified by an AD operational amplifier and then sent to a processor for processing and calculation, and then the body temperature value is output;
a second NTC thermistor: because the environment temperature can influence the temperature measurement value of the thermopile, the processor compensates the measurement value of the thermopile according to the NTC feedback value by utilizing the characteristic that the resistance value of the thermistor changes along with the change of the environment temperature, so that the accuracy of the measurement value is improved;
a second distance sensor: similarly, when the infrared thermopile sensor measures the body temperature, the measured value is greatly influenced by the distance, so when the processor calculates the body temperature value, the distance parameter needs to be increased for compensation, and the calculated body temperature value is accurate;
a processor: receiving an instruction of the background equipment, circularly reading output values of different infrared thermopile sensors and distance sensors and thermistor feedback values, calculating a body temperature value of each current probe corresponding to a tested person or a body position, and outputting the body temperature value to the received back-end equipment in a serial port, CAN (controller area network) or wireless data transmission mode and other transmission modes;
a second output interface: and a plurality of modes such as serial ports, CAN, wireless data transmission and the like are selected by a user to adapt to different back-end equipment.
Example 4
As shown in fig. 9, the video processing terminal device according to this embodiment further includes, on the basis of embodiment 1:
a video memory: the video recorder is used for storing video and picture data, recording multiple paths of videos in real time and independently, and playing back the videos on equipment or a PC (personal computer) when needed;
the program memory is used for storing a program file for data processing of the second central processing unit;
the memory is used for storing various data generated during the data processing of the second central processing unit;
a power management module: managing a power supply of the equipment, collecting a control signal on the vehicle, and ensuring that the equipment is started and shut down and supplies power to peripheral equipment such as a camera and the like in a correct functional state;
a coprocessor: receiving data of a serial port and a CAN bus and a control command of the infrared remote controller from the interface, performing corresponding processing actions, and transmitting related instructions to a processing center for corresponding function processing when required; the coprocessor monitors the working state of the DSP in the processing center, and resets the DSP when the DSP processor is abnormal so as to ensure that the DSP can normally carry out video coding and decoding processing for a long time;
an analog-to-digital converter: for a camera with an analog signal at the front end, receiving a video signal from an analog video input interface, converting the video signal into a standard digital signal, such as an ITU bt.656 or bt.1120 digital signal, and then sending the standard digital signal to a processing center DSP for encoding, previewing, compressing, storing and the like; for the camera with digital signal output, the received signal is sent to DSP for encoding, previewing, compressing, storing and other relevant processing;
a second central processor: the latest ARM + DSP dual-core processor is adopted and is a core component of video processing terminal equipment, video data and body temperature monitoring data sent from a camera are captured, portrait pictures are superposed on images, the body temperature data are compressed to generate the pictures and are stored, meanwhile, data related to the body temperature and other pictures are stored in file information, and related operations and processing such as encoding compression, storage and sending of the video image data to a background management server are carried out;
fig. 10 is a flowchart of video overlay of the second central processing unit, and the specific flow is as follows:
the body temperature and positioning data are input into a body temperature and positioning data dot matrix buffer area, a video stream is input into a video buffer area, a program is started, the starting position of data superposition is determined according to the length and the width of an image and the pixel bit depth, the superposition operation of A (image + information) is carried out on the body temperature positioning data and image data of a corresponding area according to the set transparency of superposition information, the video data after the body temperature and the positioning data are superposed has two processing modes, the first mode calls JPEG compression to store the data into a JPG picture, the JPG picture is sent to a background server or stored into a local memory, and the second mode calls H.265/264 or MPEG compression algorithm to generate a compressed video stream and send the compressed video stream to the background server or store.
External interface: the device comprises a serial port, a CAN or wireless data transmission interface, and is used for receiving body temperature measurement values and other communication data sent by a camera or an independent body temperature hair monitoring meter.
The invention has the following functions:
1. the camera with the non-contact body temperature monitoring function simultaneously outputs images and body temperature monitoring data, and sends the body temperature monitoring data to the back-end processing equipment through transmission modes such as a serial port, a CAN (controller area network), wireless data transmission and the like;
2. the multi-probe non-contact body temperature monitoring equipment is used for simultaneously measuring the body temperature of a plurality of people in multiple directions and sending body temperature monitoring data to the back-end processing equipment in transmission modes such as a serial port, a CAN (controller area network), wireless data transmission and the like;
3. the video processing terminal device captures a portrait image, and superimposes the received body temperature monitoring data and related data such as time, positioning and the like on the picture and file information of the stored picture, and stores the data;
4. the video processing terminal equipment sends the information of the image and the body temperature data to a background management server through a wireless network, and the background performs corresponding operations such as data management, analysis and statistics and the like according to different service types;
5. when capturing a person or passenger with the body temperature exceeding a set value, the video processing terminal device automatically reminds a manager or a driver and a passenger so that the manager can perform corresponding processing according to requirements;
6. when an epidemic situation occurs, the management system can analyze and count all related personnel according to data stored on a local or video processing terminal;
7. the video processing terminal equipment reserves a protocol interface and can input the information which can be read by the external expansion equipment and can be superposed with other information capable of identifying the identity of a person;
8. the camera and the video processing terminal equipment with the non-contact body temperature monitoring function can also be applied to conventional security monitoring, in particular to monitoring of building, community entrances and exits or crossings with more people.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (8)
1. A body temperature and video image monitoring system, comprising:
the camera with the non-contact body temperature monitoring function is used for acquiring body temperature data and video image data of people entering and exiting in a non-contact manner and uploading the body temperature data and the video image data to the video processing terminal equipment;
the multi-probe multi-point non-contact body temperature monitor is used for measuring the body temperature of one person in different body positions or multiple persons simultaneously by adopting a non-contact mode and uploading measured body temperature data to video processing terminal equipment;
the video processing terminal equipment receives body temperature data and video image data of a camera with a non-contact body temperature monitoring function or body temperature data of a multi-probe multi-point non-contact body temperature monitor, captures a human face head portrait picture of a door, superimposes a corresponding body temperature value with time and positioning data, stores the human face head portrait picture and the time and positioning data in a local memory together with video data, sends the human face head portrait picture to a background manager through a wireless network for storage and corresponding processing when a network exists, and automatically alarms to prompt a manager or a driver to perform protection and processing according to a specified requirement if the body temperature exceeds a set value;
the background manager receives the data sent by the video processing terminal equipment, monitors and stores the data, and plays back, analyzes and counts the personnel and the related data when abnormity or epidemic situation occurs; or the data stored on the video processing terminal equipment which is not connected with the network is processed in the same way by the importing mode;
the camera that possesses non-contact body temperature monitor function includes:
the image sensor is used for acquiring video image data of people entering and exiting and sending the video image data to the first central processing unit for processing;
the first infrared thermopile temperature sensor is used for converting absorbed human body infrared radiation into heat energy by utilizing the principle that the radiation energy of an object changes along with the temperature, converting the temperature change into an electronic signal, amplifying the output signal by an AD operational amplifier, sending the amplified output signal to a first central processing unit for processing and calculating, and outputting a body temperature value;
the first thermistor is used for compensating the measured value of the thermopile according to the NTC feedback value by utilizing the characteristic that the resistance value of the thermistor changes along with the change of the environmental temperature, so that the accuracy of the measured value is improved;
a first distance sensor: the first central processing unit is used for obtaining the parameters of the distance between the person and the person, and when the body temperature value is calculated by the first central processing unit, the parameters of the distance are increased for compensation, so that the accuracy of the calculated body temperature value is improved;
the first central processing unit has image processing and data acquisition and calculation functions, and is used for reading output values of the infrared thermopile sensor and the distance sensor after recognizing a face image through an infrared and image recognition algorithm and calculating a body temperature value of a current measured person through a thermistor feedback value; the calculated body temperature value is directly superposed on a video image or is output to a received video processing terminal device in a serial port, CAN or wireless data transmission mode; if the output of the video image of the camera is an analog signal, the body temperature value is directly superposed on the video signal through a modulation circuit and sent out together, and then the corresponding body temperature value is demodulated by the video processing terminal equipment; if the output of the video image of the camera is a digital signal, the body temperature value is directly superposed on the image data according to the protocol and sent out, and then the data of the body temperature value is resolved by the video processing terminal equipment according to the protocol;
and the first output interface is used for uploading the body temperature data and the video image data to the video processing terminal equipment in a serial port, CAN, wireless data transmission or video data superposition mode.
2. The system for monitoring body temperature and video images according to claim 1, wherein the multi-probe multi-point non-contact body temperature monitor comprises:
the second infrared thermopile temperature sensor is used for converting absorbed human body infrared radiation into heat energy by utilizing the principle that the radiation energy of an object changes along with the temperature, converting the temperature change into an electronic signal, amplifying the output signal by an AD operational amplifier, sending the amplified output signal to a processor for processing and calculating, and outputting a body temperature value;
a second thermistor: the device is used for compensating the measured value of the thermopile according to the NTC feedback value by utilizing the characteristic that the resistance value of the thermistor changes along with the change of the environmental temperature, so that the accuracy of the measured value is improved;
a second distance sensor: the distance parameter is added for compensation when the processor calculates the body temperature value, so that the accuracy of the calculated body temperature value is improved;
the processor is used for receiving an instruction of the video processing terminal equipment, circularly reading output values of different infrared thermopile sensors and distance sensors and thermistor feedback values, calculating the body temperature value of each current probe corresponding to a tested person or position, and outputting the body temperature value to the received video processing terminal equipment in a serial port, CAN or wireless data transmission mode;
and the second output interface is used for uploading the body temperature data to the video processing terminal equipment in various modes of serial port, CAN and wireless data transmission.
3. The system for monitoring the body temperature and the video images according to claim 1, wherein the video processing terminal device comprises:
the video memory is used for storing video and picture data, recording multiple paths of videos in real time and independently, and playing back the videos on equipment or a PC (personal computer) when needed;
the program memory is used for storing a program file for data processing of the second central processing unit;
the memory is used for storing various data generated during the data processing of the second central processing unit;
the power management module is used for managing the power of the equipment, acquiring control signals, and ensuring that the equipment is started and shut down in a correct functional state and supplies power to the camera and the external equipment of the body temperature monitor;
the coprocessor is used for receiving data of the serial port and the CAN bus and a control command of the infrared remote controller from the interface, carrying out corresponding processing action, and transmitting a related instruction to the second central processing unit for corresponding function processing when required; the coprocessor monitors the working state of the second central processing unit, and resets the second central processing unit when the second central processing unit is abnormal so as to ensure that the second central processing unit can normally carry out video coding and decoding processing for a long time;
the analog-to-digital converter is used for receiving video signals from the analog video input interface and converting the video signals into standard digital signals for the camera with the front end being analog signals, and then sending the standard digital signals to the second central processing unit for encoding, previewing, compressing and storing; for the camera with digital signal output, the received signal is sent to the second CPU for coding, previewing, compressing and storing;
the second central processing unit adopts a dual-core processor, is a core component of the video processing terminal equipment, and is used for capturing the image of the person, overlaying the body temperature data to the image, compressing the image to generate the image and storing the image, storing the body temperature and other image related data into file information, and performing coding compression, storage and related operation and processing on the video image data and transmitting the video image data to the background manager;
and the external interface comprises a video interface, a serial port, a CAN or wireless data transmission interface and is used for receiving the body temperature measurement value and the video image data sent by the camera or the independent body temperature monitor.
4. The system for monitoring body temperature and video images according to claim 1, wherein the calculation method of the body temperature of the first central processing unit is as follows:
the following relationship exists between the measured temperature and the ambient temperature:
Vout=S(T1-T2)；
vout is the output voltage of the thermopile; s is a proportional system; t1 is the temperature of the tested person; t2 is the current ambient temperature;
the first central processing unit calculates a quantized value according to an input reference voltage value and the resolution digit of the ADC corresponding to the thermopile access, and the quantized value is multiplied by the conversion value of the ADC to obtain a measured value T3 of the temperature;
the measured value of the normal body temperature is within the small range of 35-42 ℃, the measuring range is controlled to be 0-150 CM, a two-dimensional correction coefficient table is established in a program according to the characteristics of the body temperature values and the distances measured by different thermopile probes, and after the body temperature value is measured by the processor, the measured value is corrected according to the corresponding correction coefficient Y to obtain the final body temperature value: t4 = Y (T3).
5. The system for monitoring the body temperature and the video images as claimed in claim 1, wherein the first central processing unit adopts a MCU + DSP dual processor, the MCU and the DSP are independent, the DSP processes the video image data, and the MCU processes the body temperature data.
6. The system for monitoring body temperature and video images as claimed in claim 1, wherein the first central processing unit employs an enhanced DSP processor with AD and communication ports for processing and outputting the video image data and the body temperature data together.
7. The system for monitoring the body temperature and the video images as claimed in claim 3, wherein the specific flow of the video superposition of the second central processing unit is as follows:
the body temperature and positioning data are input into the body temperature, the dot matrix buffer area of the positioning data is input into the video buffer area, a program is started, the starting position of data superposition is determined according to the length and the width of an image and the pixel bit depth, the superposition operation of image + information is carried out on the body temperature positioning data and image data of a corresponding area according to the set transparency of superposition information, the video data after the body temperature and the positioning data are superposed has two processing modes, JPEG compression is called for the first time to be stored into a JPG picture, the JPG picture is sent to a background server or stored into a local storage, and H.265/264 or MPEG compression algorithm is called for the second time to generate a compressed video stream, and the compressed video stream is sent to.
8. The system for monitoring the body temperature and the video images as claimed in claim 3, wherein the second central processing unit adopts an ARM + DSP dual-core processor.
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