Bionic device for mobile calibration of thermal imaging type screening instrument

Abstract

The utility model discloses a bionic device for thermal imaging type screening instrument mobile calibration, which relates to the technical field of thermal imaging type screening instrument calibration and comprises a mobile cart and a bionic human head, a black body radiation source with effective emissivity of 0.98 is arranged in the bionic human head, a black body cavity of the black body radiation source is positioned at the center of the forehead of the bionic human head, and the black body cavity of the black body radiation source is positioned at the center of the forehead of the bionic human head. A first heating coil and a second heating coil are wound on the outer side of the black body cavity; according to the utility model, the black-body radiation source is embedded into the bionic human head, so that the black-body radiation source can be used for body temperature mode error calibration under the condition of face recognition of the screening instrument, the black-body radiation source is provided with the uninterruptible power supply, and when screening instruments at different positions are calibrated, the blackbody radiation source is prevented from being powered off due to position movement, and the calibration accuracy is improved. The waiting time required for restarting and stabilizing the blackbody radiation source is avoided, and the working efficiency of field calibration is improved. The device disclosed by the utility model is placed on a movable trolley, so that field calibration movement is facilitated, and the labor intensity of calibration personnel is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to thermal imaging type screening instrument calibration technical field especially relates to a kind of bionic device for mobile calibration of thermal imaging type screening instrument. BACKGROUND

[0002] The infrared human body surface temperature rapid screening instrument, referred to as screening instrument, is an instrument that converts the information into human body temperature by focusing the infrared line radiated outward from the forehead surface skin of human body to infrared detector through optical system. It utilizes infrared temperature measurement technology to rapidly measure and convert forehead surface temperature of human body. When the measured human body surface temperature reaches or exceeds the preset warning temperature value, warning is given to screen, so as to achieve the purpose of body temperature screening. The screening instrument has the characteristics of non-contact, rapid, convenient, intuitive and safe, and overcomes the shortcomings of traditional thermometers, forehead thermometers, point thermometers and ear thermometers, which are only used for individual measurement, time-consuming and prone to cross infection. It is very suitable for rapid body temperature screening in places with large flow of people, such as airports, ports, stations, hospitals and shopping malls.

[0003] The screening instrument includes point temperature type, multi-point type and thermal imaging type. The thermal imaging type screening instrument is usually equipped with special body temperature screening software, which has a face detection module. Only the highest temperature value of forehead area is measured, and the measured value is converted into human body temperature measurement value by software, so as to shield the high temperature source in the field of view of the screening instrument to prevent false alarm. The face detection module uses 2D face recognition technology based on facial features.

[0004] At present, the calibration of screening instrument is usually carried out by professional measurement technicians according to the national measurement technical specification "JJF 1107-2003 Infrared thermometer for measuring human body temperature calibration specification". The laboratory error of screening instrument is the difference between the temperature measured by screening instrument in calibration mode and the absolute black body (effective emission rate is 1.00) under the condition of specified environmental temperature, humidity and black body temperature. The calibration mode of screening instrument is independently set in its supporting software, and the influence of correction value obtained by calibration mode on body temperature mode measurement result is different due to different software algorithms of different manufacturers. Since the laboratory error is not the body temperature measurement error, it is necessary to directly calibrate the measurement error of screening instrument in body temperature mode to more accurately reflect the measured human body temperature.

[0005] In addition, many entrances of public places are equipped with screening instruments. Since the distance between each entrance is far, the measurement personnel need to turn off the power of black body radiation source after completing calibration at one entrance, carry it to another entrance, turn on the power of black body radiation source again, and start calibration work after the temperature reaches the set value and stabilizes. It takes a lot of time to reach the stable state after starting the black body radiation source, which limits the work efficiency of on-site calibration. UTILITY MODEL CONTENTS

[0006] The utility model discloses a bionic device for mobile calibration of thermal image type screening instrument.

[0007] In order to realize the above-mentioned purpose, the utility model adopts the following technical scheme:

[0008] A bionic device for mobile calibration of thermal image type screening instrument, including mobile trolley, bionic head, the bionic head is built in the blackbody radiation source of effective emissivity 0.98, the blackbody cavity of blackbody radiation source is located the center position of bionic head forehead, the first heating coil and second heating coil are bound outside the blackbody cavity, the first heating coil is close to blackbody cavity opening and covers 1 / 3 of blackbody cavity outer wall, the second heating coil is far from blackbody cavity opening and covers 2 / 3 of blackbody cavity outer wall, and the first heating coil and second heating coil outside are filled with heat preservation cotton, the first thermometer and second thermometer are embedded in the inner wall of blackbody cavity, the temperature sensing point of first thermometer is close to blackbody cavity opening, the temperature sensing point of second thermometer is far from blackbody cavity opening, the first heating coil is connected with first power cord, the second heating coil is connected with second power cord, the first power cord and second power cord are connected to the output end of first temperature controller and second temperature controller respectively, and the first thermometer and second thermometer are connected to the input end of first temperature controller and second temperature controller through first extension line and second extension line respectively, the bottom surface of bionic head is provided with locating nut;

[0009] The lifting platform is arranged on the mobile trolley, the hand wheel is arranged on the lifting platform, the uninterruptible power supply is placed below the lifting platform, the inclined table and the supporting arm are rotatably arranged above the lifting platform, the bottom wall of the end of the supporting arm close to the inclined table is provided with the clamping groove matched with the end of the supporting arm, and the inclined table is supported by the supporting arm.

[0010] The first heating coil, the first thermometer, the first extension line and the first temperature controller are combined, and the second heating coil, the second thermometer, the second extension line and the second temperature controller are combined, so that the double-section independent temperature control capability of the blackbody radiation source is formed, the phenomenon that the temperature of the opening section of the blackbody cavity is low due to the heat dissipation caused by the convection of external air is avoided, the temperature uniformity of the blackbody cavity is effectively ensured, and the stability of the brightness temperature of the blackbody radiation source is ensured.

[0011] Preferably, the temperature range of the blackbody radiation source is room temperature +5℃-40.0℃, and the first and second temperature meters are Pt100 type.

[0012] Preferably, the blackbody cavity is made of purple copper in sections, the inner wall is coated with black paint with an emissivity of not less than 0.9, the length-diameter ratio of the cylindrical section of the blackbody cavity is not less than 2, and the bottom of the blackbody cavity is a non-flat bottom conical surface.

[0013] Preferably, the stroke of the lifting platform is adjusted by a hand wheel to be 0-45cm, the inclination angle of the inclination platform ranges from 0 to 60°, the inclination platform is a non-slip surface, the lifting platform is supported by a fixed partition, and the uninterruptible power supply is located below the fixed partition.

[0014] Preferably, the bionic human head can be fixed on a tripod through the positioning nut and used alone.

[0015] Compared with the prior art, the utility model has the beneficial effects that:

[0016] 1. In the utility model, the blackbody radiation source is embedded in the bionic human head, which can be used for error calibration of the body temperature mode under the face recognition of the screening instrument, and solves the problem that the screening instrument can only recognize the forehead temperature of the face under the body temperature mode but cannot recognize the temperature of the blackbody radiation source; the effective emissivity of the blackbody cavity of the utility model is 0.98, which is consistent with the emissivity of the forehead of an adult, so that the reading of the screening instrument under the body temperature mode can be directly compared with the temperature of the blackbody radiation source, and the measurement error of the screening instrument under the body temperature mode can be calculated.

[0017] 2. In the utility model, the blackbody radiation source is provided with an uninterruptible power supply, which avoids power failure of the blackbody radiation source caused by position movement when calibrating the screening instrument at different positions, avoids the waiting time required for restarting and stabilizing the blackbody radiation source, and improves the work efficiency of on-site calibration. The device of the utility model is placed on a mobile trolley, which facilitates on-site calibration movement and reduces the labor intensity of the calibration personnel. BRIEF DESCRIPTION OF DRAWINGS

[0018] The accompanying drawings are used to provide a further understanding of the utility model, and constitute a part of the specification, together with the embodiments of the utility model, to explain the utility model, and do not constitute a limitation on the utility model.

[0019] Fig. 1 It is a schematic view of the overall structure of the utility model;

[0020] Fig. 2 It is a front view schematic view of the bionic human head in the utility model;

[0021] Fig. 3 It is a cross section schematic view of the bionic head in the utility model.

[0022] In the figure: 1, mobile trolley; 2, uninterrupted power supply; 3, lifting platform; 4, hand wheel; 5, inclined platform; 6, support arm; 7, bionic head; 8, blackbody radiation source; 9, blackbody cavity; 10, first heating coil; 11, second heating coil; 12, heat preservation cotton; 13, first thermometer; 14, first power line; 15, second thermometer; 16, second power line; 17, first extension line; 18, second extension line; 19, first temperature controller; 20, second temperature controller; 21, positioning nut. DETAILED DESCRIPTION

[0023] The technical scheme in the utility model embodiment will be clearly and completely described below with reference to the drawings in the utility model embodiment;

[0024] Reference Figs. 1-3 A kind of bionic device for mobile calibration of thermal imaging screening instrument, including mobile trolley 1, bionic head 7, the proportion of bionic head 7 size and adult head is 1:1, the blackbody radiation source 8 with effective emissivity of 0.98 is built-in in bionic head 7, the blackbody cavity 9 of blackbody radiation source 8 is located at the central position of the forehead of bionic head 7, first heating coil 10 and second heating coil 11 are wound outside the blackbody cavity 9, the inside of first heating coil 10 and second heating coil 11 is nichrome wire, and the outside is glass fiber, first heating coil 10 is close to the opening of blackbody cavity 9 and covers 1 / 3 of the outer wall of blackbody cavity 9, second heating coil 11 is away from the opening of blackbody cavity 9 and covers 2 / 3 of the outer wall of blackbody cavity 9, first heating coil 10 and second heating coil 11 are filled with heat preservation cotton 12 outside, first thermometer 13 and second thermometer 15 are embedded in the inner wall of blackbody cavity 9, the temperature sensing point of first thermometer 13 is close to the opening of blackbody cavity 9, the temperature sensing point of second thermometer 15 is away from the opening of blackbody cavity 9, first heating coil 10 is connected to first power line 14, second heating coil 11 is connected to second power line 16, first power line 14 is connected to the output end of first temperature controller 19, and second power line 16 is connected to the output end of second temperature controller 20, first thermometer 13 is connected to the input end of first temperature controller 19 by first extension line 17, and second thermometer 15 is connected to the input end of second temperature controller 20 by second extension line 18, first temperature controller 19 and second temperature controller 20 are powered by power bus, and power bus is connected to the 220V alternating current output by uninterrupted power supply 2, the bottom surface of bionic head 7 is provided with positioning nut 21.

[0025] The lifting table 3 is arranged on the mobile trolley 1, the hand wheel 4 is arranged on the lifting table 3, the uninterrupted power supply 2 is placed below the lifting table 3, the tilting table 5 and the supporting arm 6 are rotatably arranged above the lifting table 3, the bottom wall of the tilting table 5 close to one end of the supporting arm 6 is provided with a clamping groove matched with the end of the supporting arm 6, the tilting table 5 is supported by the supporting arm 6, the bionic human head 7 is placed on the tilting table 5, the input end of the uninterrupted power supply 2 is connected with the commercial power through the power line, and the input end of the blackbody radiation source 8 is connected with the output end of the uninterrupted power supply 2 through the power line.

[0026] The first heating coil 10, the first thermometer 13, the first extension line 17 and the first temperature controller 19 are combined, and the second heating coil 11, the second thermometer 15, the second extension line 18 and the second temperature controller 20 are combined, so that the double-section independent temperature control capability of the blackbody radiation source 8 is formed, the phenomenon that the temperature of the opening section of the blackbody cavity 9 is low due to the heat dissipation caused by the convection of external air is effectively avoided, the temperature uniformity of the blackbody cavity 9 is effectively ensured, and the stability of the brightness temperature of the blackbody radiation source 8 is ensured. After the temperatures of the two sections are stable and equal, the calibration of the screening instrument can be performed.

[0027] In the embodiment, preferably, the temperature range of the blackbody radiation source 8 is room temperature + 5℃-40.0℃, which is equal to the surface emissivity of the forehead of an adult, and the models of the first thermometer 13 and the second thermometer 15 are Pt100. The brightness temperature of the blackbody radiation source 8 should be traced to the social public measurement standard every year, and the effective emissivity of the blackbody radiation source 8 should be measured at least every 3 years. In the embodiment, after calibration, the brightness temperature of the blackbody radiation source 8 is 0.1℃ lower than the display temperature of the temperature controller, that is, the correction value is -0.1℃.

[0028] In the embodiment, preferably, the blackbody cavity 9 is made of purple copper in sections, the inner wall is coated with black paint with an emissivity not less than 0.9, the length-diameter ratio of the cylindrical section of the blackbody cavity 9 is not less than 2, and the bottom of the blackbody cavity 9 is a non-flat bottom conical surface.

[0029] In the embodiment, preferably, the stroke of the lifting table 3 is adjusted to 0-45cm through the hand wheel 4, the inclination angle range of the tilting table 5 is 0-60°, and the tilting table 5 is an anti-skid surface. The lifting table 3 and the tilting table 5 can realize the up-down movement and inclination of the bionic human head 7, so that the axis of the blackbody cavity 9 is perpendicular to the receiving surface of the screening instrument, and the measurement uncertainty is reduced. The lifting table 3 is supported by the fixed partition plate, and the uninterrupted power supply 2 is located below the fixed partition plate.

[0030] In the embodiment, preferably, the bionic human head 7 can be fixed on the tripod through the positioning nut 21 and used alone, and the tripod can realize the up-down movement and inclination of the bionic human head 7.

[0031] In this embodiment, first fix the dummy head 7 on the tilt table 5, connect the input of the uninterruptible power supply 2 to the mains, set the temperature of the blackbody radiation source 8 to 37.4℃, make the distance between the bottom of the blackbody cavity 9 and the acceptance surface of the screening instrument be the measurement distance of the screening instrument set by the computer software (3m), adjust the lifting platform 3 and the tilt table 5 to make the axis of the blackbody cavity 9 be perpendicular to the acceptance surface of the screening instrument, and make the imaging area of the blackbody cavity 9 on the computer software be the minimum; after the first temperature controller 19 and the second temperature controller 20 both reach 37.4℃ and are stable for 10 minutes, read the temperature of the blackbody cavity 9 measured by the screening instrument on the computer software, which is 37.1℃. The error of the calibrated screening instrument in the body temperature mode is calculated by the following formula:

[0032] Error = computer software reading - (temperature controller display value + correction value)

[0033] = 37.1 - (37.4 - 0.1) = -0.2℃

[0034] That is, the error of the calibrated screening instrument in the body temperature mode is -0.2℃ (the calibration temperature point is 37.3℃).

[0035] When the calibration of the screening instrument is completed, disconnect the uninterruptible power supply 2 from the mains; the uninterruptible power supply 2 supplies power to the blackbody radiation source 8 through the built-in battery and the inverter to maintain the temperature of the blackbody radiation source 8 stable; when it is the turn of the next screening instrument to be calibrated, connect the uninterruptible power supply 2 to the mains again.

Claims

1. A bionic device for mobile calibration of thermal imaging screening instruments, comprising a mobile trolley (1), a bionic head (7), characterized in that, The effective emissivity of the bionic head (7) is 0.98, the black body cavity (9) of the black body radiation source (8) is located at the center of the forehead of the bionic head (7), the first heating coil (10) and the second heating coil (11) are wound outside the black body cavity (9), the first heating coil (10) is close to the opening of the black body cavity (9) and covers 1 / 3 of the outer wall of the black body cavity (9), the second heating coil (11) is away from the opening of the black body cavity (9) and covers 2 / 3 of the outer wall of the black body cavity (9), the first heating coil (10) and the second heating coil (11) are filled with thermal insulation cotton (12) outside, the inner wall of the black body cavity (9) is embedded with the first thermometer (13) and the second thermometer (15), the temperature sensing point of the first thermometer (13) is close to the opening of the black body cavity (9), the temperature sensing point of the second thermometer (15) is away from the opening of the black body cavity (9), the first heating coil (10) is connected with the first power line (14), the second heating coil (11) is connected with the second power line (16), the first power line (14) is connected to the output end of the first temperature controller (19), the second power line (16) is connected to the output end of the second temperature controller (20), the first thermometer (13) is connected to the input end of the first temperature controller (19) through the first extension line (17), the second thermometer (15) is connected to the input end of the second temperature controller (20) through the second extension line (18), and the bottom surface of the bionic head (7) is provided with a positioning nut (21). The lifting platform (3) is provided on the mobile trolley (1), the hand wheel (4) is arranged on the lifting platform (3), the uninterruptible power supply (2) is placed below the lifting platform (3), the tilting platform (5) and the supporting arm (6) are rotatably arranged above the lifting platform (3), the bottom wall of the tilting platform (5) close to one end of the supporting arm (6) is provided with a clamping groove matched with the end of the supporting arm (6), the tilting platform (5) is supported by the supporting arm (6), the bionic head (7) is placed on the tilting platform (5), the input end of the uninterruptible power supply (2) is connected to the mains through the power line, and the first temperature controller (19) and the second temperature controller (20) of the black body radiation source (8) are powered by the power bus connected to the 220V alternating current output by the uninterruptible power supply (2).

2. A bionic device for mobile calibration of a thermal imaging screening instrument according to claim 1, characterized in that, The temperature range of the black body radiation source (8) is room temperature+5℃-40.0℃, and the models of the first thermometer (13) and the second thermometer (15) are Pt100.

3. The bionic device for mobile calibration of thermal imaging screening instrument according to claim 1, characterized in that, The black body cavity (9) is made of purple copper in sections, the inner wall is coated with black paint with an emissivity not less than 0.9, the length-diameter ratio of the cylindrical section of the black body cavity (9) is not less than 2, and the bottom of the black body cavity (9) is a non-flat bottom conical surface.

4. The bionic device for mobile calibration of thermal imaging screening instrument according to claim 1, characterized in that, The stroke of the lifting platform (3) is adjusted to 0-45cm by the hand wheel (4), the inclination angle range of the tilting platform (5) is 0-60°, the lifting platform (3) is supported by the fixed partition plate, and the uninterruptible power supply (2) is located below the fixed partition plate.

5. The bionic device for mobile calibration of thermal imaging screening instrument according to claim 1, characterized in that, The mannequin head (7) can be used alone, fixed on a tripod by means of the positioning nut (21). The mannequin head (7) can be used alone, fixed on a tripod by means of the positioning nut (21).

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