CN112049541A - An infrared radiation automatic door sensing system - Google Patents

Abstract

The invention discloses an infrared radiation automatic door sensing system, which consists of an infrared emitting device, an infrared detecting device, a circuit processing system and a mechanical control system; the infrared emitting device emits infrared light after being electrified, the infrared emitting device is received by the infrared detecting device, the infrared light is converted into an electric signal through the circuit processing system and is transmitted to the mechanical system, and the mechanical system finally converts the received electric signal into a mechanical signal to control the opening and closing of the automatic door. The infrared radiation automatic door sensing system utilizes the fold-shaped structure of spherical graphene, realizes multi-stage infrared rapid infrared emission under the condensation and combination action of macromolecules and the cooperation of micromolecule high-radiation inorganic particles, and has the characteristics of low cost, easiness in manufacturing, interference resistance, high weather resistance and the like.

Description

An infrared radiation automatic door sensing system

technical field

The invention belongs to the technical field of infrared sensing, and in particular relates to an infrared radiation automatic door sensing system.

Background technique

With the development of society, human beings have higher and higher requirements for intelligent life, but at the same time, with the gradual consumption of fossil energy, energy costs are getting higher and higher. Therefore, low-cost smart living has become the choice of the times.

At present, laser devices are commonly used in infrared emission systems, which are costly, consume a lot of power, and are easily disturbed by pollutants.

The interface infrared emission is mainly the surface infrared emission of high radiation materials, such as pure silicon carbide, carbon tubes, etc. But its emissivity has reached the conventional infrared emission limit (infrared emissivity 95%). To further enhance infrared emission, multi-gradient infrared emission must be introduced and applied well.

In addition, the coating must have a certain hydrophobicity, thereby preventing the corrosive effect of rainwater on the infrared emitting substrate, thereby improving the stability of the infrared emitting system.

SUMMARY OF THE INVENTION

The purpose of the present invention is to overcome the deficiencies of the prior art and provide an infrared radiation automatic door sensing system. The automatic door sensing system has a multi-level infrared emission structure, and the infrared reflection layer on the reverse side of the copper foil and the infrared ray on the front side of the copper foil are rationally designed. The material stacking structure of the emissive coating realizes multi-level energy input suppression and multi-level infrared radiation, providing a feasible solution for low-cost infrared emission, which can simultaneously achieve energy saving, rapid large-area infrared emission, anti-corrosion and multi-band simultaneous emission, etc. Advantages, provide a guarantee for the stable operation of the automatic door sensing system.

The object of the present invention is achieved through the following technical solutions: an infrared radiation automatic door sensing system, the infrared radiation automatic door sensing system is composed of an infrared emission device, an infrared detection device, a circuit processing system, and a mechanical control system; After the transmitting device is powered on, it emits infrared light, which is received by the infrared detection device, and is converted into an electrical signal by the circuit processing system and transmitted to the mechanical system. The mechanical system finally converts the received electrical signal into a mechanical signal to control the opening and closing of the automatic door. The infrared emission device is composed of a copper foil heating layer, an infrared reflection layer coated on the reverse side of the copper foil heating layer, and an infrared radiation paint coated on the front surface of the copper foil heating layer. The infrared reflection layer is composed of polyaluminum silicate; the infrared radiation coating uses few-layer graphene as the bottom layer, silicon carbide as the middle radiation layer, the graphitizable polymer layer as the upper layer and the rivet fixing layer, and the spherical graphene runs through The middle radiating layer and the upper layer and the few-layer graphene are rivetted by conjugation. The size of the spherical graphene is 0.1-2 μm, and the total thickness of the bottom layer, the middle radiation layer and the upper layer does not exceed 1/4 of the size of the spherical graphene; the thickness of the upper layer is less than 1/6 of the total thickness of the bottom layer and the middle radiation layer. The infrared radiation paint forms a layer-by-layer assembly structure by centrifugal spraying.

Further, the graphitizable polymer layer is composed of a graphitizable polymer, and the graphitizable polymer is selected from polyimide, pitch, or polyacrylonitrile with a molecular weight of 4000-12000.

Further, the silicon carbide layer is composed of hyperbranched carbosilane, the molecular weight of the hyperbranched carbosilane is less than 10000, and the branching degree is 1.2-1.4.

Further, the polysilicate is feldspar (K ₂ O·Al ₂ O ₃ ·6SiO ₂ ) layer, mica (K ₂ O·2Al ₂ O ₃ ·6SiO ₂ ·2H ₂ O) layer, kaolin (Al 2 O 3 . _{2O3.2SiO2.22H2O )} layer, _{zeolite ( Na2O.Al2O3.3SiO2.22H2O ) layer} or _{garnet ( 3CaO.Al2O3.3SiO2 ) layer} .

Further, the preparation method of the infrared emission device is:

(1) 1 part by weight of spherical graphene, 0.001-0.01 part by weight of few-layer mechanically exfoliated graphene, 0.005-0.01 part by weight of graphitizable high molecular oligomer, 0.1-0.4 part by weight of hyperbranched carbosilane and 0.01-0.04 part by weight The peroxide cross-linking agent is mixed evenly, centrifugally sprayed on the front of the copper foil heating layer, and 0.1-5 parts of polysilicate is centrifugally sprayed on the reverse side of the copper foil heating layer, followed by UV curing, and the temperature of UV curing is 60 -120℃, the time is 1-6h.

(2) then heating and shaping to obtain an infrared emitting device.

Further, the peroxide crosslinking agent includes but is not limited to: dicumyl peroxide, methyl ethyl ketone peroxide, benzoic acid peroxide, 2,5-dimethyl-2,5 bis(tert-butylperoxide) base) hexane.

Further, the spherical graphene is formed by spraying a graphene oxide solution with a concentration of 0.1 mg/mL-1 mg/mL, and is prepared by chemical reduction and thermal reduction at 1300-1600 ° C. The _D /I _G value is not higher than 0.05, and the wall thickness is less than 4 atomic layers.

Further, the centrifugal force of the centrifugation ranges from 4000 to 12000 rcf.

Further, the specific method of heating and shaping is as follows: at 0-250°C, the heating rate is less than 5°C/min, and the temperature is controlled for 1-3h; 3h; then rapidly heat up to 1300°C, the heating rate is greater than 50°C/min, and the temperature is maintained for 1-5min.

Compared with the prior art, the present invention has the following beneficial effects: the present invention utilizes centrifugal spraying to realize layer-by-layer directional assembly of insulating and thermally conductive coating materials according to different material densities, and finally realizes infrared radiation. In order to conduct thermal interface, the few-layer graphene layer transfers heat from copper foil to graphene microspheres through phonon resonance. The graphitizable polymer layer is actually a carbonizable nano-film, which links spherical graphene and silicon carbide to play the role of rivets; spherical graphene has two functions: first, it guides heat from the interface to a spherical shape with a high specific surface area. On graphene, second, spherical graphene has a high emissivity, radiates heat quickly and efficiently, and greatly enhances the radiation effect of silicon carbide.

The existence of the infrared reflection layer is to suppress the heat dissipation and infrared radiation on the reverse side of the copper foil, so as to form a unidirectional heat conduction structure of the copper foil and improve the conversion efficiency of electricity to infrared; The thermal resistance effect of the interface layer is improved, and the position of the graphene ball as the main body of infrared emission is increased to improve the radiation effect. The thickness of the upper layer is less than 1/6 of the total thickness of the middle radiation layer and the upper layer, and while acting as a rivet, there is no excessive thermal resistance effect on the silicon carbide radiation layer. Therefore, the infrared radiation device has the characteristics of energy saving, high radiation and uniform infrared emission. Its broad-band high-intensity radiation can avoid the shielding effect of special substances on infrared light signals, which greatly ensures the anti-interference of the infrared automatic door from the external environment.

Furthermore, the graphene sphere itself has a certain degree of hydrophobicity. With the cooperation of the hydrophobic surface of the microsphere and the coordination of the distance between the microspheres, the surface of the infrared emitting coating has a good anti-rain infiltration property, which protects the copper foil heating layer from being damaged. Corrosion from external rainwater, etc., enhances the stability and durability of infrared emission.

Therefore, the infrared radiation automatic door sensing system has the characteristics of low cost, easy fabrication, anti-interference, and high weather resistance.

Detailed ways

In order to make the object and effect of the present invention more clear, the present invention will be described in further detail below with reference to specific embodiments.

Example 1

The invention provides an infrared radiation automatic door sensing system. The infrared radiation automatic door sensing system is composed of an infrared emission device, an infrared detection device, a circuit processing system, and a mechanical control system; The detection device receives it, converts it into an electrical signal through the circuit processing system and transmits it to the mechanical system, and the mechanical system finally converts the received electrical signal into a mechanical signal to control the opening and closing of the automatic door. The infrared emission device is composed of a copper foil heating layer, an infrared reflection layer coated on the reverse side of the copper foil heating layer, and an infrared radiation paint coated on the front surface of the copper foil heating layer. The infrared emission device is prepared by the following method:

(1) The graphene oxide solution with a concentration of 0.1 mg/mL was sprayed at 200 °C, reduced by HI at 80 °C for 8 h, and then irradiated at 1300 °C for 6 h to prepare spherical graphene.

The scanning electron microscope test proved that spherical graphene was finally obtained, and the ID/ _IG value of the spherical _graphene was 0.04 by Raman detection, and its scale was 0.1 μm, and the wall thickness of spherical graphene was 2 atomic layers.

(2) 1 weight part of spherical graphene, 0.001 weight part of few-layer mechanical exfoliation graphene, 0.005 weight part of polyimide with molecular weight of 4000, 0.1 weight part of hyperbranched carbosilane with molecular weight of 9800 and branching degree of 1.2 and 0.01 parts by weight of dicumyl peroxide are mixed evenly, centrifugally sprayed on the front side of the copper foil heating layer, while 0.1 weight part of feldspar (K ₂ O·Al ₂ O ₃ 6SiO ₂ ) is centrifugally sprayed on the copper foil heating layer On the opposite side, set the centrifugal force of centrifugation to 4000 rcf, and then perform UV curing at a temperature of 120 °C and a time of 1 h.

(3) Then heat and shape, and the process of heating and shaping is as follows: at 250 °C, the heating rate is 4 °C/min, and the temperature is controlled for 1 h; Then the temperature was raised to 1300° C., the heating rate was 55° C./min, and the temperature was maintained for 1 min to obtain an infrared emission device.

The structure of the infrared emitting device prepared by the above method is as follows: the infrared reflection layer is composed of polyaluminum silicate; The molecular layer serves as the upper layer and the rivet fixing layer, and the spherical graphene runs through the bottom layer and the middle radiation layer and rivets with few-layer graphene through conjugation. The total thickness of the bottom layer, the middle radiation layer and the upper layer is 1/4 of the size of spherical graphene; the thickness of the upper layer is 1/7 of the total thickness of the bottom layer and the middle radiation layer.

The infrared emitting device prepared by the above method is assembled into an infrared automatic door, and is simulated and used in various environments, no signs of insensitivity appear in a continuous period of one year, and the stability is excellent. Therefore, the multi-level infrared radiation automatic door can be widely used in shopping malls, hotels and other occasions.

Example 2

The invention provides an infrared radiation automatic door sensing system. The infrared radiation automatic door sensing system is composed of an infrared emission device, an infrared detection device, a circuit processing system and a mechanical control system; the infrared emission device emits infrared light after being powered on, It is received by the infrared detection device, converted into electrical signals by the circuit processing system and transmitted to the mechanical system, and the mechanical system finally converts the received electrical signals into mechanical signals to control the opening and closing of the automatic door. The infrared emission device is composed of a copper foil heating layer, an infrared reflection layer coated on the reverse side of the copper foil heating layer, and an infrared radiation paint coated on the front surface of the copper foil heating layer. The infrared emission device is prepared by the following method:

(1) The graphene oxide solution with a concentration of 1 mg/mL was sprayed at 200 °C, and reduced by HI at 80 °C for 8 h, followed by infrared emission at 1600 °C for 6 h to prepare spherical graphene.

The scanning electron microscope test proves that spherical graphene is finally obtained. After Raman test, the ID/ _IG value of the spherical _graphene is 0.05, its scale is 2 μm, and the wall thickness of spherical graphene is 3-4 atomic layers.

(2) 1 part by weight of spherical graphene, 0.01 part by weight of few-layer mechanically exfoliated graphene, 0.01 part by weight of pitch having a molecular weight of 12,000, 0.4 part by weight of hyperbranched carbosilane having a molecular weight of 8,000 and a degree of branching of 1.4, and 0.04 part by weight of 5 parts of methyl ethyl ketone peroxide were mixed evenly, centrifugally sprayed on the front side of the copper foil heating layer, while 5 parts by weight of mica (K ₂ O 2Al ₂ O ₃ 6SiO ₂ 2H ₂ O) were centrifugally sprayed on the reverse side of the copper foil heating layer, The centrifugal force of the centrifugation was set to 12000rcf, and then UV curing was performed. The temperature of UV curing was 60°C and the time was 6h.

(3) Then heat and shape, the process of heating and shaping is: at 250 °C, the heating rate is 3.5 °C/min, and the temperature is controlled for 3h; Then, the temperature was raised to 1300° C., the heating rate was 60° C./min, and the temperature was controlled for 5 min to obtain an infrared emission device.

The structure of the infrared emission device prepared by the above method is as follows: the infrared reflection layer is composed of polyaluminum silicate; the radiation coating uses few-layer graphene as the bottom layer, silicon carbide as the intermediate radiation layer, and the graphitizable polymer layer As the upper layer and the rivet fixing layer, spherical graphene penetrates the bottom layer and the middle radiation layer and rivets with few-layer graphene through conjugation. The total thickness of the bottom layer, the middle radiation layer and the upper layer is 1/5 of the size of spherical graphene; the thickness of the upper layer is 1/8 of the total thickness of the bottom layer and the middle radiation layer.

The infrared emitting device prepared by the above method is assembled into an infrared automatic door, and is simulated and used in various environments, no signs of insensitivity appear in a continuous period of one year, and the stability is excellent. Therefore, the multi-level infrared radiation automatic door can be widely used in shopping malls, hotels and other occasions.

Example 3

The invention provides an infrared radiation automatic door sensing system. The infrared radiation automatic door sensing system is composed of an infrared emission device, an infrared detection device, a circuit processing system and a mechanical control system; the infrared emission device emits infrared light after being powered on, It is received by the infrared detection device, converted into electrical signals by the circuit processing system and transmitted to the mechanical system, and the mechanical system finally converts the received electrical signals into mechanical signals to control the opening and closing of the automatic door. The infrared emission device is composed of a copper foil heating layer, an infrared reflection layer coated on the reverse side of the copper foil heating layer, and an infrared radiation paint coated on the front surface of the copper foil heating layer. The infrared emission device is prepared by the following method:

(1) The graphene oxide solution with a concentration of 0.5 mg/mL was sprayed at 200 °C, reduced by HI at 80 °C for 8 h, and then irradiated at 1600 °C for 6 h to prepare spherical graphene.

The scanning electron microscope test proved that spherical graphene was finally obtained, and the ID/ _IG value of the spherical _graphene was 0.01 by Raman test, and its size was 1 μm, and the wall thickness of spherical graphene was 2 atomic layers.

(2) 1 weight part of spherical graphene, 0.005 weight part of few-layer mechanically exfoliated graphene, 0.008 weight part of polyacrylonitrile with molecular weight of 6000, 0.2 weight part of hyperbranched carbosilane with molecular weight of 9000 and branching degree of 1.2 and 0.02 parts by weight of benzoic acid was mixed evenly, centrifugally sprayed on the front side of the copper foil heating layer, while 2 weight parts of kaolin (Al ₂ O ₃ 2SiO ₂ 22H ₂ O) was centrifugally sprayed on the reverse side of the copper foil heating layer, set The centrifugal force of the centrifugation was 5000 rcf, followed by UV curing, the temperature of UV curing was 100°C, and the time was 2 h.

(3) Then heat and shape, and the process of heating and shaping is: at 0 °C, the heating rate is 4 °C/min, and the temperature is controlled for 1 h; Then the temperature was raised to 1300° C., the heating rate was 55° C./min, and the temperature was maintained for 1 min to obtain an infrared emission device.

The structure of the infrared emission device prepared by the above method is as follows: the infrared reflection layer is composed of polyaluminum silicate; the radiation coating uses few-layer graphene as the bottom layer, silicon carbide as the intermediate radiation layer, and the graphitizable polymer layer As the upper layer and the rivet fixing layer, spherical graphene penetrates the bottom layer and the middle radiation layer and rivets with few-layer graphene through conjugation. The total thickness of the bottom layer, the middle radiation layer and the upper layer is 1/10 of the size of spherical graphene; the thickness of the upper layer is 1/7 of the total thickness of the bottom layer and the middle radiation layer.

The infrared emitting device prepared by the above method is assembled into an infrared automatic door, and is simulated and used in various environments, no signs of insensitivity appear in a continuous period of one year, and the stability is excellent. Therefore, the multi-level infrared radiation automatic door can be widely used in shopping malls, hotels and other occasions.

Example 4

The invention provides an infrared radiation automatic door sensing system. The infrared radiation automatic door sensing system is composed of an infrared emission device, an infrared detection device, a circuit processing system and a mechanical control system; the infrared emission device emits infrared light after being powered on, It is received by the infrared detection device, converted into electrical signals by the circuit processing system and transmitted to the mechanical system, and the mechanical system finally converts the received electrical signals into mechanical signals to control the opening and closing of the automatic door. The infrared emission device is composed of a copper foil heating layer, an infrared reflection layer coated on the reverse side of the copper foil heating layer, and an infrared radiation paint coated on the front surface of the copper foil heating layer. The infrared emission device is prepared by the following method:

(1) The graphene oxide solution with a concentration of 0.5 mg/mL was sprayed at 200 °C, reduced by HI at 80 °C for 8 h, and then irradiated at 1600 °C for 6 h to prepare spherical graphene.

The scanning electron microscope test proves that spherical graphene is finally obtained. After Raman test, the ID/ _IG value of the spherical _graphene is 0.02, its scale is 1.5 μm, and the wall thickness of the spherical graphene is 2 atomic layers.

(2) 1 weight part of spherical graphene, 0.01 weight part of few-layer mechanically exfoliated graphene, 0.005 weight part of polyimide with molecular weight of 10000, 0.3 weight part of hyperbranched carbosilane with molecular weight of 8000 and branching degree of 1.2 and 0.01 parts by weight of 2,5-dimethyl-2,5 bis(tert-butylperoxy)hexane, mixed uniformly, centrifugally sprayed on the front of the copper foil heating layer, and 0.1-5 parts by weight (K ₂ O ·Al ₂ O ₃ ·6SiO ₂ ) was centrifugally sprayed on the reverse side of the copper foil heating layer, and the centrifugal force was set to 8000rcf, followed by ultraviolet curing, the temperature of ultraviolet curing was 100°C, and the time was 2h.

(3) Then heat and shape, and the process of heating and shaping is: at 0 °C, the heating rate is 3 °C/min, and the temperature is controlled for 3 hours; then the temperature is raised to 500 °C, the heating rate is 3 °C/min, and the temperature is maintained for 1 hour; Then the temperature was raised to 1300° C., the heating rate was 60° C./min, and the temperature was maintained for 1 min to obtain an infrared emission device.

The structure of the infrared emission device prepared by the above method is as follows: the infrared reflection layer is composed of polyaluminum silicate; the radiation coating uses few-layer graphene as the bottom layer, silicon carbide as the intermediate radiation layer, and the graphitizable polymer layer As the upper layer and the rivet fixing layer, spherical graphene penetrates the bottom layer and the middle radiation layer and rivets with few-layer graphene through conjugation. The total thickness of the bottom layer, the middle radiation layer and the upper layer is 1/4 of the size of spherical graphene; the thickness of the upper layer is 1/10 of the total thickness of the bottom layer and the middle radiation layer.

The infrared emitting device prepared by the above method is assembled into an infrared automatic door, and is simulated and used in various environments, no signs of insensitivity appear in a continuous period of one year, and the stability is excellent. Therefore, the multi-level infrared radiation automatic door can be widely used in shopping malls, hotels and other occasions.

Claims (9)

1. An infrared radiation automatic door sensing system is characterized by comprising an infrared emitting device, an infrared detecting device, a circuit processing system and a mechanical control system; the infrared emitting device emits infrared light after being electrified, the infrared emitting device is received by the infrared detecting device, the infrared light is converted into an electric signal through the circuit processing system and is transmitted to the mechanical system, and the mechanical system finally converts the received electric signal into a mechanical signal to control the opening and closing of the automatic door. The infrared emission device is composed of a copper foil heating layer, an infrared reflection layer coated on the reverse side of the copper foil heating layer and an infrared radiation coating coated on the front side of the copper foil heating layer. The infrared reflecting layer is composed of polyaluminium silicate; the infrared radiation coating takes few-layer graphene as a bottom layer, silicon carbide as a middle radiation layer, a graphitizable high molecular layer as an upper layer and a rivet fixing layer, and spherical graphene penetrates through the middle radiation layer and the upper layer and rivets with the few-layer graphene through conjugation. The size of the spherical graphene is 0.1-2 mu m, and the total thickness of the bottom layer, the middle radiation layer and the upper layer is not more than 1/4 of the size of the spherical graphene; the thickness of the upper layer is less than 1/6 of the total thickness of the bottom layer and the middle radiating layer. The infrared radiation coating forms a layer-by-layer assembly structure in a centrifugal spraying mode.

2. The infrared radiation automatic door sensing system as claimed in claim 1, wherein the graphitizable polymer layer is made of graphitizable polymer selected from polyimide, pitch, or polyacrylonitrile with molecular weight of 4000-12000.

3. The infrared radiation automatic door sensing system of claim 1, wherein the silicon carbide layer is composed of hyperbranched carbosilane, the hyperbranched carbosilane has a molecular weight of less than 10000 and a degree of branching of 1.2-1.4.

4. The infrared reflecting layer according to claim 1, wherein said polysilicate is feldspar (K)₂O·Al₂O₃·6SiO₂) Mica (K)₂O·2Al₂O₃·6SiO₂·2H₂O), kaolin (Al)₂O₃·2SiO₂·22H₂O), zeolite (Na)₂O·Al₂O₃·3SiO₂·22H₂O) or garnet (3 CaO. Al)₂O₃·3SiO₂)。

5. The infrared radiation automatic door sensing system of claim 1, wherein the infrared emitting device is prepared by the following method:

(1) uniformly mixing 1 part by weight of spherical graphene, 0.001-0.01 part by weight of few-layer mechanically-exfoliated graphene, 0.005-0.01 part by weight of graphitizable high-molecular oligomer, 0.1-0.4 part by weight of hyperbranched carbosilane and 0.01-0.04 part by weight of peroxide cross-linking agent, centrifugally spraying on the front surface of the copper foil heating layer, simultaneously centrifugally spraying 0.1-5 parts by weight of polysilicate on the back surface of the copper foil heating layer, and then carrying out ultraviolet curing at the temperature of 60-120 ℃ for 1-6 h.

(2) And then heating and shaping are carried out to obtain the infrared emitting device.

6. The infrared radiation automatic door sensing system of claim 5, wherein the peroxide crosslinking agent includes, but is not limited to: dicumyl peroxide, methyl ethyl ketone peroxide, benzoic acid peroxide and 2, 5-dimethyl-2, 5-bis (tert-butylperoxy) hexane.

7. The infrared radiation automatic door sensing system as claimed in claim 5, wherein the spherical graphene is prepared by spraying graphene oxide solution with concentration of 0.1mg/mL-1mg/mL, and performing chemical reduction and 1300-1600 ℃ thermal reduction, wherein I of the spherical graphene is_D/I_GThe value is not higher than 0.05 and the wall thickness is less than 4 atomic layers.

8. The infrared radiation automatic door sensing system as claimed in claim 5, wherein the centrifugal force of the centrifuge is in the range of 4000-.

9. The infrared radiation automatic door sensing system of claim 5, characterized in that the specific method of heat setting is: at the temperature of 0-250 ℃, the temperature rising speed is less than 5 ℃/min, and the temperature is controlled and preserved for 1-3 h; then heating to 500 ℃, wherein the heating speed is less than 5 ℃/min, and keeping the temperature for 1-3 h; then the temperature is quickly raised to 1300 ℃, the temperature raising speed is higher than 50 ℃/min, and the temperature is controlled for 1-5 min.