CN211740404U - Infrared temperature measurement module, infrared temperature measurement rifle and security door - Google Patents
Infrared temperature measurement module, infrared temperature measurement rifle and security door Download PDFInfo
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- CN211740404U CN211740404U CN202020479978.1U CN202020479978U CN211740404U CN 211740404 U CN211740404 U CN 211740404U CN 202020479978 U CN202020479978 U CN 202020479978U CN 211740404 U CN211740404 U CN 211740404U
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Abstract
The application discloses infrared temperature measurement module, infrared temperature measurement rifle and security check door. The infrared temperature measurement module comprises an infrared temperature sensor and a convex lens, wherein the convex lens is used for refracting and converging infrared rays returned by radiation of a measured target to the infrared temperature sensor and is arranged in front of the infrared temperature sensor; the PCB is connected with the infrared temperature sensor and used for processing the temperature information of the measured target collected by the infrared temperature sensor and outputting temperature value data after the compensation effect is accurate; and a light reflecting surface is arranged on the inner side wall of the cavity for encapsulating the convex lens and the infrared temperature sensor, and the light reflecting surface is a sawtooth-shaped light reflecting surface. The infrared temperature sensor can improve the measurement range and the measurement precision of the infrared temperature sensor, increase the measurement distance which can reach 50-100cm, improve the detection efficiency and avoid contact infection. The infrared measurement module of this application can be adorned on the temperature measurement rifle to simple structure, simple to operate.
Description
Technical Field
The application relates to the technical field of temperature measurement, in particular to an infrared temperature measurement module, a non-contact infrared temperature measurement gun and an infrared temperature measurement method.
Background
The infrared temperature measuring gun (non-contact infrared thermometer) is very wide and convenient in application in life and work, the infrared temperature measuring gun in the market can obtain a measuring result in a short time without the temperature measuring time as long as that of a thermometer, the measuring result can be displayed on an LCD screen or sent to a display device through a serial port, multiple measuring records can be recorded, and the measuring record can be returned once to be checked.
However, the infrared thermometric gun in the prior art has a too short measuring distance, the measuring range is about 5-15cm, the infrared thermometric gun can only be installed on a handheld device generally, the body temperature is detected by the infrared thermometric gun of the handheld device, the body temperature can be detected only by approaching the infrared thermometric gun, the detection efficiency is not high, and a user sometimes contacts the measured person carelessly due to improper operation, and if the patient is a fever, the contact infection is easily caused. Accordingly, the prior art is deficient and needs improvement.
Accordingly, the prior art is yet to be improved and developed.
Disclosure of Invention
In order to overcome the shortcoming that the testing distance is too short among the prior art, the purpose of this application provides an infrared temperature measurement module, infrared temperature measurement rifle and safety inspection door, and this application adopts a sensor module group that is used for infrared temperature measurement, has increased measuring distance, and measuring distance can reach 50-100cm, has improved detection efficiency, and can avoid contact infection.
The technical scheme of the application is as follows:
an infrared thermometry module, comprising:
the infrared temperature measurement module comprises a convex lens and an infrared temperature sensor, wherein the convex lens is used for refracting and converging infrared rays returned by radiation of a measured target to the infrared temperature sensor, the infrared temperature sensor is used for collecting temperature information of the measured target according to the infrared rays refracted and converged by the convex lens, the convex lens is arranged in front of the infrared temperature sensor, the convex lens and the infrared temperature sensor are packaged in the same cavity, and the central lines of the convex lens and the infrared temperature sensor are positioned on the same horizontal line;
the PCB is connected with the infrared temperature sensor and used for processing the temperature information of the measured target collected by the infrared temperature sensor and outputting temperature value data after the compensation effect is accurate;
the distance between the infrared temperature sensor and the convex lens is greater than or equal to 1 time of the focal length of the convex lens and less than two times of the focal length of the convex lens;
a reflecting surface is arranged on the inner side wall of the cavity for packaging the convex lens and the infrared temperature sensor; the reflecting surface is a sawtooth-shaped reflecting surface.
The infrared temperature measurement module, wherein, infrared temperature measurement module includes: the infrared temperature sensor comprises a hollow lens barrel, a front cover, a convex lens and an infrared temperature sensor, wherein the front cover is arranged at the front end of the lens barrel and used for installing the convex lens; the convex lens and the infrared temperature sensor are packaged in a cavity of the lens barrel.
The infrared temperature measurement module is characterized in that the inner side wall of the lens barrel is provided with a sawtooth-shaped reflecting surface, or the inner side wall of the lens barrel is provided with a horn-shaped sawtooth-shaped reflecting surface from outside to inside;
the lens cone is a copper lens cone, the front cover is screwed on the copper lens cone, and the convex lens can be replaced by movably rotating the front cover.
The infrared temperature measurement module, wherein when the distance between infrared temperature sensor and the convex lens equals the focal length of the convex lens, a deviation of +/-10% is set.
The infrared temperature measurement module is characterized in that the focal length of the convex lens is 11.07mm, and the distance between the infrared temperature sensor and the convex lens is 12 mm; the length of the lens barrel is 18.6 mm.
The infrared temperature measuring module is characterized in that the convex lens, the infrared temperature sensor and the PCB are integrally installed in the same packaging shell;
the convex lens is a silicon convex lens made of silicon or a germanium convex lens made of germanium; the light reflecting surface adopts a smooth mirror surface to realize the copper piece light reflecting surface of the reflected light.
The infrared temperature measurement module is characterized in that the infrared temperature measurement module is mounted at the front end of the PCB, and a slot base capable of being plugged with a flat cable is arranged at the rear end of the PCB;
the infrared temperature measurement module is externally provided with a square cover cap structure, the front end of the square cover cap structure is provided with a round hole corresponding to the convex lens, the front end of the square cover cap structure is provided with the infrared temperature measurement module, and the PCB circuit board with the slot base arranged at the rear end of the infrared temperature measurement module is arranged in the square cover cap structure.
The infrared temperature measurement module, wherein, infrared temperature sensor with the distance between the convex lens is adjustable through a fine tuning, but adjustable distance range is for being greater than 1 focus and being less than twice focus of convex lens.
A non-contact infrared temperature measurement gun comprises a display screen and any one of infrared temperature measurement modules, wherein the infrared temperature measurement modules are arranged on the non-contact infrared temperature measurement gun.
The utility model provides a security check door, wherein, includes the display screen, and arbitrary infrared temperature measurement module, infrared temperature measurement module sets up on non-contact infrared temperature measurement rifle:
the infrared rays radiated by the measured target are refracted and converged to the infrared temperature sensor through a convex lens packaged in front of the infrared temperature sensor;
the infrared temperature sensor collects temperature information of a measured target according to infrared rays converged by the convex lens and infrared rays reflected by the inner wall of the cavity;
and the PCB circuit board is connected with the infrared temperature sensor, processes the temperature information of the measured target collected by the infrared temperature sensor, and outputs temperature value data after the compensation effect is accurate.
The beneficial effect of this application is: according to the infrared temperature measurement module, the infrared temperature measurement gun and the security check door, due to the adoption of the infrared temperature measurement module, the infrared temperature measurement module comprises an infrared temperature sensor for collecting temperature information of a measured target and a convex lens for refracting and converging infrared rays returned by radiation of the measured target to the infrared temperature sensor, the convex lens is arranged in front of the infrared temperature sensor, the convex lens and the infrared temperature sensor are packaged in the same cavity, and the central lines of the convex lens and the infrared temperature sensor are positioned on the same horizontal line; the PCB is connected with the infrared temperature sensor and used for processing the temperature information of the measured target collected by the infrared temperature sensor and outputting temperature value data after the compensation effect is accurate; the distance between the infrared temperature sensor and the convex lens is greater than or equal to 1 time of the focal length of the convex lens and less than two times of the focal length of the convex lens; and a reflective surface is arranged on the inner side wall of the cavity for encapsulating the convex lens and the infrared temperature sensor. According to the infrared temperature measurement module, the convex lens is additionally arranged on the infrared measurement module, the measurement range and the measurement precision of the infrared temperature sensor can be improved through the focusing performance of the convex lens, the measurement distance is increased and can reach 50-100cm, the detection efficiency is improved, and the temperature measurement module is more widely applied, so that the measurement requirements of different environments are met, and the contact infection can be avoided. In the application, a reflecting surface is arranged on the inner side wall of a cavity for encapsulating the convex lens and the infrared temperature sensor, and the reflecting surface is a sawtooth-shaped reflecting surface; the light condensation effect can be further increased, and the measurement is more accurate under the condition of ensuring that the measurement distance is prolonged; the infrared measurement module of this application can be adorned on the temperature measurement rifle, can be used for the individual, also is applicable to the environment big and need the temperature measurement to the people flow to simple structure, simple to operate.
Drawings
Fig. 1 is a schematic perspective view of an infrared temperature measurement module without a square cover structure according to an embodiment of the present disclosure.
Fig. 2 is a schematic view of an infrared light path of an infrared temperature measurement module of the infrared temperature measurement module according to the embodiment of the present application.
Fig. 3 is a schematic view illustrating installation distances of components of an infrared temperature measurement module according to an embodiment of the present application.
Fig. 4 is a schematic view of a reflecting surface of a sawtooth-shaped horn mouth of an infrared temperature measurement module according to an embodiment of the present application.
Fig. 5 is a schematic structural diagram of a square cover of the infrared temperature measurement module according to the embodiment of the present application.
Detailed Description
The application provides an infrared temperature measurement module, infrared temperature measurement rifle and safety inspection door, for making the purpose, technical scheme and the effect of this application clearer, make clear more, the following further detailed description to this application with reference to the attached drawing and the example of lifting. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
The inventor researches and discovers that the infrared temperature measurement sensor is a device for measuring temperature by utilizing infrared rays, and the infrared temperature measurement sensor can be divided into two types, namely a photoelectric infrared temperature sensor and a thermoelectric infrared temperature sensor according to the measurement principle. The pyroelectric infrared temperature sensor measures absorbed infrared radiation by using the thermal effect of infrared radiation through a thermoelectric effect, a pyroelectric effect, a thermistor and the like, and indirectly measures the temperature of a radiated infrared light object.
The infrared temperature measurement principle is as follows: as long as the temperature of any object is higher than absolute zero (-273 ℃), heat radiation is emitted to the outside, the temperature of the object is different, the energy radiated by the object is also different, the wavelength of the radiation wave is also different, but the object always contains infrared radiation, the temperature of the object is below thousand ℃, and strong electromagnetic waves in the heat radiation are infrared waves, so that the surface temperature of the object can be accurately measured by measuring the infrared radiation of the object, and the objective basis of the temperature measurement of the infrared thermometer is provided.
However, the infrared thermometric gun in the prior art has a too short measuring distance, the measuring range is about 5-15cm, the infrared thermometric gun can only be installed on a handheld device generally, the body temperature is detected by the infrared thermometric gun of the handheld device, the body temperature can be detected only by approaching the infrared thermometric gun, the detection efficiency is not high, and a user sometimes contacts the measured person carelessly due to improper operation, and if the patient is a fever, the contact infection is easily caused. Accordingly, the prior art is deficient and needs improvement.
For this reason, embodiment 1 of the present application provides an infrared temperature measurement module, as shown in fig. 1 and fig. 2, in this embodiment 1, the infrared temperature measurement module includes:
the infrared temperature measurement module 100 comprises a convex lens 10 for refracting and converging infrared rays returned by radiation of a measured target to an infrared temperature sensor 110, and the infrared temperature sensor 110 for collecting temperature information of the measured target according to the infrared rays refracted and converged by the convex lens 10;
the PCB 14 is connected with the infrared temperature sensor 110 and used for processing the temperature information of the measured target collected by the infrared temperature sensor 110 and outputting temperature value data after compensation accuracy;
as shown in fig. 1 and 2, in the embodiment of the present application, the convex lens 10 is disposed in front of the infrared temperature sensor 110, the convex lens 10 and the infrared temperature sensor 110 are encapsulated in the same cavity, and the center lines of the convex lens 10 and the infrared temperature sensor 110 are on the same horizontal line, as shown in fig. 2; when the infrared temperature measurement module of the embodiment is used for measuring temperature, infrared rays radiated by a measured target are refracted and converged to the infrared temperature sensor through the convex lens packaged in front of the infrared temperature sensor; the infrared temperature sensor collects temperature information of a measured target according to infrared rays converged by the convex lens.
And the inner side wall of the cavity for encapsulating the convex lens and the infrared temperature sensor is provided with a reflecting surface which is a sawtooth-shaped reflecting surface. In the application, a reflecting surface is arranged on the inner side wall of a cavity for encapsulating the convex lens and the infrared temperature sensor, and the reflecting surface is a sawtooth-shaped reflecting surface (121 shown in figure 4); the light condensation effect can be further increased, and the measurement is more accurate under the condition that the measurement distance is prolonged.
Because of the converging function of the convex lens, the lighting principle of the convex lens (10) is shown in figure 2, and the convex lens of the embodiment has the function of converging light rays. If the object to be measured is at different positions in front of the convex lens, the light rays emitted by the object have different convergence conditions after passing through the convex lens, namely the imaging properties of the object are different. The convex lens 10 is arranged in front of the infrared temperature sensor 110, so that light rays emitted from the rear focal point F1 can be changed into a beam of parallel light, and infrared rays detected by the infrared temperature sensor 110 after convergence are more concentrated. The intensity of central light intensity and the light spot brightness are increased, and the light extraction efficiency is high. The embodiment improves the measurement accuracy of the infrared temperature sensor 110, and the measurement distance can be enlarged to 50-100 cm.
This embodiment provides an infrared temperature measurement module, can be used for infrared temperature measurement rifle and security door. When the infrared temperature measuring gun is applied, the infrared sensor module can be installed in a shell groove of the infrared temperature measuring gun, and real-time measuring data is sent by a serial port. When the security inspection door is applied, the infrared sensor module can be placed in the middle of the top frame of the security inspection door, and data can be sent through the serial port.
In the embodiment of the present application, in order to make light focus on the whole area source on infrared temperature sensor 110 better, adopt before infrared temperature sensor 110 terminal surface with distance between the terminal surface behind convex lens 10 is more than or equal to 1 times focus of convex lens 10 and be less than twice focus of convex lens 10. As shown in fig. 2, since the distance between the front end surface of the infrared temperature sensor 110 and the rear end surface of the convex lens 10 is greater than or equal to 1 times the focal length of the convex lens 10 and less than two times the focal length of the convex lens 10, which is the convergence range of the convex lens (from the focal length F point 1 times to the focal length F point 2 times of the convex lens 10 as shown in fig. 2), the energy of the infrared rays radiated from the body temperature of the subject can be concentrated after the infrared rays are converged by the convex lens, the body temperature measurement data is more accurate, and the measurement distance can be further increased.
In the present embodiment, as shown in fig. 2, the infrared sensor 110 includes a sensing wafer 111 and a heat dissipation ring 112 disposed around the sensing wafer 111, and preferably, as shown in fig. 2, the distance between the sensing wafer 111 of the infrared temperature sensor 110 and the convex lens 10 is greater than or equal to 1 times the focal length of the convex lens 10 and less than twice the focal length of the convex lens 10. The infrared sensor 110 can measure the temperature more accurately when the sensing wafer 111 receives the infrared rays in the converging range of the convex lens.
As shown in fig. 3, with the infrared temperature measurement module, the focal length F of the convex lens 10 is 11.07mm, and the distance between the infrared temperature sensor 110 and the convex lens 10 is 12 mm; the barrel 12 is 18.6mm in length. This distance point is set to achieve the best measurement result.
That is, in the embodiment of the present invention, in order to better focus the light on the entire area source on the infrared temperature sensor 110, the distance between the infrared temperature sensor 110 and the convex lens 10 should be greater than 1 focal length of the convex lens 10 and less than 2 focal lengths. The convex lens (10) focus that this application adopted is 11.07mm, and the distance that infrared temperature sensor 110 and convex lens 10 were placed is length integration for realizing 12mm, and convex lens 10, infrared temperature sensor 110 and signal processor integrate in same encapsulation promptly, and lens cone 12 length of this application is 18.6 mm.
In the embodiment of the application, in order to further improve the measurement effect, adopt the encapsulation convex lens 10 with the cavity inner wall of infrared temperature sensor 110 is provided with the reflection of light face, can increase the measurement energy through the reflection of light to the further reflection of infrared ray light, improves measurement effect.
As an embodiment of the present application, the infrared temperature measurement module, as shown in fig. 1 and fig. 2, the infrared temperature measurement module 100 includes: a lens barrel 12 having a hollow shape, a front cover 11 disposed at a front end of the lens barrel 12 for mounting a convex lens 10, the convex lens 10 mounted on the lens barrel 12 through the front cover 11, and the infrared temperature sensor 110 disposed at a rear end of the lens barrel 12; the convex lens 10 and the infrared temperature sensor 110 are encapsulated in the cavity of the lens barrel 12. Thus, the infrared temperature measurement module 100 of the present embodiment is packaged as the lens barrel 12 type infrared temperature measurement module 100, and can be installed in various temperature measurement devices for measuring temperature, for example, in a forehead temperature gun, and can be installed on a security door frame.
In a further embodiment, as shown in fig. 1, the convex lens 10, the infrared temperature sensor 110, and the PCB 14 may be integrally mounted in the same package housing; can be simply and conveniently installed in various temperature measuring devices for measuring temperature.
In an implementation manner, in order to further improve the measurement effect, the infrared temperature measurement module described in this embodiment adopts that the inner side wall of the lens barrel 12 is provided with the sawtooth-shaped light reflecting surface, and the sawtooth-shaped light reflecting surface is arranged, so that the effect of a mirror surface can be achieved, the function of reflecting light is realized, a further light condensing function is provided, the measurement precision is improved, and the measurement distance can be prolonged. In a preferred embodiment, the inner side wall of the lens barrel 12 is provided with a trumpet-shaped sawtooth-shaped light reflecting surface (121 shown in fig. 4) from outside to inside; the surface area of the inner wall of the sensor can be increased, the thermal resistance is reduced, the heat dissipation is enhanced, and the cooling process time is short; the light that makes to have certain inclination and incide in the lens cone can be through the reflection gathering to infrared temperature sensor 110 on to can be fine "pin" light, improve measurement accuracy, can further prolong measuring distance, utilize the light reflection principle to enlarge the light scope of sensor gathering, make temperature measurement module measuring range wider, temperature measurement module application more extensive.
Further, in the embodiment, the lens barrel 12 is a copper lens barrel, and the heat dissipation effect is better by using the copper lens barrel. The front cover 11 is screwed on the copper lens barrel, and the convex lens 10 can be replaced by movably rotating the front cover 11. Therefore, the convex lens 10 can be conveniently replaced according to the requirement, and the maintenance and debugging are convenient.
In one embodiment, a ± 10% deviation is set when the distance between the infrared temperature sensor 110 and the convex lens 10 is equal to the focal length of the convex lens 10. For example, as shown in fig. 3, for example, the focal length of the convex lens (10) is 11.07mm, and the distance between the sensor (110) and the convex lens (10) is 12mm, the optimal extended measurement distance can be achieved, and the accurate measurement result can be maintained. Namely in the embodiment of the present application,
in a further embodiment, the convex lens 10 is a silicon convex lens made of silicon or a germanium convex lens made of germanium; need select for use the silicon material convex lens that focal length is long, penetrating rate is high, adopt the convex lens of silicon material, permeable infrared ray more than 80%, can let the temperature measuring device of this application keep fine extension distance measurement. The germanium convex lens can also ensure the effect of remote temperature measurement. Preferably, the reflecting surface adopts a smooth mirror surface to realize the copper part reflecting surface of the reflected light, so that the light-collecting and reflecting integrated LED lamp not only has the light-reflecting and light-collecting function, but also is convenient to radiate, and the time of the radiating and cooling processes is enhanced to be short.
The material of convex lens must be silicon or germanium (the light transmissivity is high, reduces the decay) promptly silicon convex lens or germanium convex lens in this application, and fresnel lens also can not, can not reach the requirement.
As shown in fig. 1, 2 and 3, in assembling the infrared sensor module of the present application, a material of the convex lens 10 is determined, and the convex lens 10 of the present application is made of a silicon material, and can transmit more than 80% of infrared rays. Determining the material of the lens barrel 12, wherein the lens barrel is made of copper, so that the heat conductivity is good, the heat dissipation of the infrared temperature sensor is increased, and the infrared temperature measurement module is more stable in performance and more accurate in measured data; then, the distance between the infrared sensor 110 and the convex lens 10 is calculated (gradually adjusted in the convergence range) according to the light collection principle of the convex lens 10, so as to determine the length of the lens barrel 12.
The lighting principle of the convex lens 10 is shown in fig. 2, and the convex lens has a light converging effect. If the object is at different positions in front of the convex lens 10, the light emitted from the object will have different convergence conditions through the convex lens, i.e. the imaging properties of the object will be different. As shown in fig. 2, the present application places a convex lens 10 in front of the infrared temperature sensor 110, so that the light emitted from the back focus F1 becomes a parallel light beam, and the infrared rays emitted from the infrared temperature sensor 110 are more concentrated. The intensity of central light intensity and the light spot brightness are increased, and the light extraction efficiency is high. The measuring precision of the sensor is improved, and the measuring distance can be enlarged to 50-100 cm.
In a further embodiment, the infrared temperature measuring module 100 is installed at the front end of the PCB 14, and the slot base 15 capable of being inserted with a flat cable is arranged at the rear end; the equipment with temperature display or processing at the rear end, such as a forehead temperature gun, can be connected through the slot base 15.
In a further embodiment, as shown in fig. 5, the outside of the infrared temperature measurement module is a square cover structure 9, the front end of the square cover structure 9 is provided with a round hole 91 corresponding to the position of the convex lens 10, and in this application, the front end shown in fig. 1 is installed with the infrared temperature measurement module 100 and the PCB circuit board 14 whose rear end is provided with the slot base 15 are installed in the square cover structure 9. Therefore, the infrared temperature measurement module can be integrally packaged in the square cover structure 9 to be made into a modular packaging structure, and can be conveniently installed and embedded into other devices needing temperature measurement, such as a forehead temperature gun or a security door.
In another embodiment, the infrared temperature measuring module may adjust the distance between the infrared temperature sensor 110 and the convex lens 10 through a fine adjustment mechanism, for example, an adjustment screw, on which the infrared temperature sensor 110 is movably mounted to adjust the distance between the infrared temperature sensor 110 and the convex lens 10, where the adjustable distance range is greater than 1 times of the focal length of the convex lens 10 and less than twice of the focal length. Like this, can in time the infrared temperature measurement module of this patent application carry out measurement accuracy check, in some needs farther apart from temperature measurement places, just can be through in time adjusting infrared temperature sensor 110 with more accurate measurement is realized to distance between convex lens 10, provides convenience for user's use.
Based on the above embodiment, this application still provides a non-contact infrared temperature measurement rifle, and the non-contact infrared temperature measurement rifle of this embodiment includes the display screen, above-mentioned embodiment infrared temperature measurement module, infrared temperature measurement module sets up on non-contact infrared temperature measurement rifle. The non-contact infrared temperature measuring gun of this embodiment can be an infrared forehead temperature gun or a security door provided with the above infrared temperature measuring module. Compared with the infrared forehead temperature gun in the prior art, the measuring distance is increased and can reach 50-100cm, the detection efficiency is improved, and the temperature measuring module is more widely applied, so that the measuring requirements of different environments are met, and contact infection can be avoided.
Based on the above embodiment, this application still provides a security check door, including the display screen, and above-mentioned embodiment infrared temperature measurement module, infrared temperature measurement module sets up on non-contact infrared temperature measurement rifle:
the convex lens 10 is packaged in front of the infrared temperature sensor 110 and refracts and converges infrared rays radiated by a detected target to the infrared temperature sensor 110;
the infrared temperature sensor 110 collects temperature information of a measured target according to the infrared rays converged by the convex lens 10 and the infrared rays reflected by the inner wall of the cavity;
the PCB 14 connected to the infrared temperature sensor 110 processes the temperature information of the target to be measured collected by the infrared temperature sensor 110, and outputs temperature data after the compensation is accurate.
In the embodiment, the convex lens is additionally arranged on the infrared measurement module, the measurement range and the measurement precision of the infrared temperature sensor can be improved through the focusing performance of the convex lens, the measurement distance is increased and can reach 50-100cm, the detection efficiency is improved, and the temperature measurement module is more widely applied, so that the measurement requirements of different environments are met, and the contact infection can be avoided.
The beneficial effect of this application is: according to the infrared temperature measurement module, the infrared temperature measurement gun and the security check door, due to the adoption of the infrared temperature measurement module 100, the infrared temperature measurement module 100 comprises an infrared temperature sensor for collecting temperature information of a measured target and a convex lens for refracting and converging infrared rays returned by radiation of the measured target to the infrared temperature sensor, the convex lens is arranged in front of the infrared temperature sensor, the convex lens and the infrared temperature sensor are packaged in the same cavity, and the central lines of the convex lens and the infrared temperature sensor are positioned on the same horizontal line; the PCB 14 is connected with the infrared temperature sensor and used for processing the temperature information of the measured target collected by the infrared temperature sensor and outputting temperature value data after compensation accuracy; the distance between the infrared temperature sensor and the convex lens is greater than or equal to 1 time of the focal length of the convex lens and less than two times of the focal length of the convex lens; and a reflective surface is arranged on the inner side wall of the cavity for encapsulating the convex lens and the infrared temperature sensor. According to the infrared temperature measurement module, the convex lens is additionally arranged on the infrared measurement module, the measurement range and the measurement precision of the infrared temperature sensor can be improved through the focusing performance of the convex lens, the measurement distance is increased and can reach 50-100cm, the detection efficiency is improved, and the temperature measurement module is more widely applied, so that the measurement requirements of different environments are met, and the contact infection can be avoided. The infrared measurement module of this application can be adorned on the temperature measurement rifle, can be used for the individual, also is applicable to the environment big and need the temperature measurement to the people flow to simple structure, simple to operate.
In the application, a reflecting surface is arranged on the inner side wall of a cavity for encapsulating the convex lens and the infrared temperature sensor, and the reflecting surface is a sawtooth-shaped reflecting surface (121 shown in figure 4); the light condensation effect can be further increased, and the measurement is more accurate under the condition that the measurement distance is prolonged.
It should be understood that the application of the present application is not limited to the above examples, and that modifications or changes may be made by those skilled in the art based on the above description, and all such modifications and changes are intended to fall within the scope of the appended claims.
Claims (10)
1. An infrared temperature measurement module, comprising:
the infrared temperature measurement module comprises a convex lens and an infrared temperature sensor, wherein the convex lens is used for refracting and converging infrared rays returned by radiation of a measured target to the infrared temperature sensor, the infrared temperature sensor is used for collecting temperature information of the measured target according to the infrared rays refracted and converged by the convex lens, the convex lens is arranged in front of the infrared temperature sensor, the convex lens and the infrared temperature sensor are packaged in the same cavity, and the central lines of the convex lens and the infrared temperature sensor are positioned on the same horizontal line;
the PCB is connected with the infrared temperature sensor and used for processing the temperature information of the measured target collected by the infrared temperature sensor and outputting temperature value data after the compensation effect is accurate;
the distance between the infrared temperature sensor and the convex lens is greater than or equal to 1 time of the focal length of the convex lens and less than two times of the focal length of the convex lens;
and a light reflecting surface is arranged on the inner side wall of the cavity for encapsulating the convex lens and the infrared temperature sensor, and the light reflecting surface is a sawtooth-shaped light reflecting surface.
2. The infrared thermometry module of claim 1, wherein the infrared thermometry module comprises: the infrared temperature sensor comprises a hollow lens barrel, a front cover, a convex lens and an infrared temperature sensor, wherein the front cover is arranged at the front end of the lens barrel and used for installing the convex lens; the convex lens and the infrared temperature sensor are packaged in a cavity of the lens barrel.
3. The infrared temperature measurement module of claim 2, wherein the inner sidewall of the lens barrel is provided with a sawtooth-shaped reflecting surface, or the inner sidewall of the lens barrel is provided with a horn-shaped sawtooth-shaped reflecting surface from outside to inside;
the lens cone is a copper lens cone, the front cover is screwed on the copper lens cone, and the convex lens can be replaced by movably rotating the front cover.
4. The infrared temperature measurement module of claim 1, wherein a + 10% offset is set when the distance between the infrared temperature sensor and the convex lens is equal to the focal length of the convex lens.
5. The infrared temperature measurement module of claim 2, wherein the convex lens focal length is 11.07mm, and the distance between the infrared temperature sensor and the convex lens is 12 mm; the length of the lens barrel is 18.6 mm.
6. The infrared temperature measurement module of claim 1, wherein the convex lens, the infrared temperature sensor, and the PCB are integrally mounted in a same package housing;
the convex lens is a silicon convex lens made of silicon or a germanium convex lens made of germanium; the light reflecting surface adopts a smooth mirror surface to realize the copper piece light reflecting surface of the reflected light.
7. The infrared temperature measurement module of claim 1, wherein the infrared temperature measurement module is mounted at the front end of the PCB, and a slot base capable of being plugged with a flat cable is arranged at the rear end of the PCB;
the infrared temperature measurement module is externally provided with a square cover cap structure, the front end of the square cover cap structure is provided with a round hole corresponding to the convex lens, the front end of the square cover cap structure is provided with the infrared temperature measurement module, and the PCB circuit board with the slot base arranged at the rear end of the infrared temperature measurement module is arranged in the square cover cap structure.
8. The infrared temperature measurement module of claim 1, wherein a distance between the infrared temperature sensor and the convex lens is adjustable by a fine adjustment mechanism, and the adjustable distance range is greater than 1 focal length and less than two focal lengths of the convex lens.
9. A non-contact infrared temperature measurement gun, characterized by comprising a display screen and the infrared temperature measurement module of any one of claims 1-8, wherein the infrared temperature measurement module is arranged on the non-contact infrared temperature measurement gun.
10. A security door, characterized by comprising a display screen and the infrared temperature measurement module of any one of claims 1-8, wherein the infrared temperature measurement module is arranged on a non-contact infrared temperature measurement gun;
the convex lens is packaged in front of the infrared temperature sensor and refracts and converges infrared rays radiated by a measured target to the infrared temperature sensor;
the infrared temperature sensor collects temperature information of a measured target according to infrared rays converged by the convex lens and infrared rays reflected by the inner wall of the cavity;
and the PCB circuit board is connected with the infrared temperature sensor, processes the temperature information of the measured target collected by the infrared temperature sensor, and outputs temperature value data after the compensation effect is accurate.
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| CN111307296A (en) * | 2020-04-03 | 2020-06-19 | 深圳市迪米科技有限公司 | Infrared temperature measurement module, infrared temperature measurement device and infrared temperature measurement method |
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2020
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111307296A (en) * | 2020-04-03 | 2020-06-19 | 深圳市迪米科技有限公司 | Infrared temperature measurement module, infrared temperature measurement device and infrared temperature measurement method |
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