CN108572192B - Tobacco product smoke specific heat capacity measuring device and measuring method thereof - Google Patents
Tobacco product smoke specific heat capacity measuring device and measuring method thereof Download PDFInfo
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- CN108572192B CN108572192B CN201810568982.2A CN201810568982A CN108572192B CN 108572192 B CN108572192 B CN 108572192B CN 201810568982 A CN201810568982 A CN 201810568982A CN 108572192 B CN108572192 B CN 108572192B
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- 239000000779 smoke Substances 0.000 title claims abstract description 103
- 235000019505 tobacco product Nutrition 0.000 title claims abstract description 43
- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000001514 detection method Methods 0.000 claims abstract description 104
- 229910052751 metal Inorganic materials 0.000 claims description 76
- 239000002184 metal Substances 0.000 claims description 76
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 70
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 62
- 239000003546 flue gas Substances 0.000 claims description 62
- 229910052697 platinum Inorganic materials 0.000 claims description 36
- 239000010935 stainless steel Substances 0.000 claims description 31
- 229910001220 stainless steel Inorganic materials 0.000 claims description 31
- 238000010438 heat treatment Methods 0.000 claims description 26
- 238000004321 preservation Methods 0.000 claims description 25
- 238000007906 compression Methods 0.000 claims description 13
- 230000006835 compression Effects 0.000 claims description 11
- 241000208125 Nicotiana Species 0.000 claims description 9
- 235000002637 Nicotiana tabacum Nutrition 0.000 claims description 9
- 238000007789 sealing Methods 0.000 claims description 9
- 229920000742 Cotton Polymers 0.000 claims description 7
- 229910052710 silicon Inorganic materials 0.000 claims description 7
- 239000010703 silicon Substances 0.000 claims description 7
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 6
- 239000007789 gas Substances 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 5
- 230000001939 inductive effect Effects 0.000 claims description 5
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 5
- 229910052721 tungsten Inorganic materials 0.000 claims description 5
- 239000010937 tungsten Substances 0.000 claims description 5
- 239000011324 bead Substances 0.000 claims description 4
- 239000011521 glass Substances 0.000 claims description 4
- 229910000838 Al alloy Inorganic materials 0.000 claims description 3
- 229910001080 W alloy Inorganic materials 0.000 claims description 3
- SNAAJJQQZSMGQD-UHFFFAOYSA-N aluminum magnesium Chemical compound [Mg].[Al] SNAAJJQQZSMGQD-UHFFFAOYSA-N 0.000 claims description 3
- ZONODCCBXBRQEZ-UHFFFAOYSA-N platinum tungsten Chemical compound [W].[Pt] ZONODCCBXBRQEZ-UHFFFAOYSA-N 0.000 claims description 3
- 238000005086 pumping Methods 0.000 claims 14
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 claims 1
- 230000000391 smoking effect Effects 0.000 abstract description 21
- 235000019504 cigarettes Nutrition 0.000 abstract description 11
- 238000013461 design Methods 0.000 abstract description 7
- 238000011161 development Methods 0.000 abstract description 7
- 238000005259 measurement Methods 0.000 abstract description 6
- 230000006641 stabilisation Effects 0.000 description 5
- 238000011105 stabilization Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000011160 research Methods 0.000 description 2
- 238000012827 research and development Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 244000061176 Nicotiana tabacum Species 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/20—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity
- G01N25/48—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity on solution, sorption, or a chemical reaction not involving combustion or catalytic oxidation
- G01N25/4873—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity on solution, sorption, or a chemical reaction not involving combustion or catalytic oxidation for a flowing, e.g. gas sample
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
- Manufacturing Of Cigar And Cigarette Tobacco (AREA)
Abstract
The invention relates to a device and a method for measuring specific heat capacity of smoke of tobacco products, and belongs to the field of detection of tobacco products. The invention comprises a control module detection module, a suction module and a power supply module; the detection module is electrically connected with the control module, the control module is electrically connected with the suction module, the detection module, the control module and the suction module are electrically connected with the power module, and the detection module is hermetically connected with the suction module through the hollow heat-insulating pipe. The method for researching the specific heat capacity of the smoke is provided, the specific heat capacity is represented in real time by the mass and the temperature of the single-port actual smoke, the measurement process is simplified, the specific heat capacity of the smoke is used for representing the heat values taken away by different smoking forces in the smoking process, technical parameter support can be provided for the development and design of the smoking set, and important reference is provided for improving the parameter accuracy of the engineering design of novel cigarettes and smoking sets, so that the method has great significance for guiding the development of the novel cigarette smoking set.
Description
Technical Field
The invention relates to a device and a method for measuring specific heat capacity of smoke of tobacco products, and belongs to the field of detection of tobacco products.
Technical Field
With the enhancement of public understanding of cigarette harm and the enhancement of government control of cigarettes, the development of novel tobacco products is enhanced by tobacco enterprises in various countries around the world. The novel cigarette characterized by heating the non-combustion tobacco is relatively similar to the traditional cigarette in physiological feeling, psychological feeling, smoking mode and the like, is easy to accept by tobacco consumers, and is a novel tobacco product with great development potential. At present, large tobacco enterprises and research and development institutions in China pay attention to research and development of novel cigarette smoking sets. In order to better adapt the tobacco products to the novel cigarette smoking articles, research institutions set a smoking article circuit scheme through the characteristic of heat required by the smoking process of the tobacco products. The power required by single-port smoking of tobacco products can provide a direct reference for the design of a smoking set circuit, but the power required by actual smoking of each port is different due to different smoking forces, so that the heat values required by various types of tobacco products in different smoking processes cannot be accurately quantified. The related detection of the performance parameters of the existing tobacco products is imperfect, the specific heat capacity measurement process is complicated, and the real-time suction detection of the specific heat capacity of the smoke of various tobacco products cannot be carried out.
Disclosure of Invention
The invention aims to provide a device and a method for measuring specific heat capacity of smoke of tobacco products, which are used for measuring a specific heat capacity detection device of smoke; meanwhile, the specific heat capacity of the smoke of different cigarettes is measured by adopting a related method through the device for detecting the specific heat capacity of the smoke of the tobacco products.
The technical scheme adopted by the invention is as follows: the device for measuring the specific heat capacity of the smoke of the tobacco product comprises a control module, a suction module, a detection module and a power module;
the detection module is electrically connected with the control module, the control module is electrically connected with the suction module, the detection module, the control module and the suction module are electrically connected with the power supply module, and the detection module is hermetically connected with the suction module;
the control module includes: the touch screen 1, the MCU controller 2 and the high-precision slide rheostat 5, wherein the detection module comprises a signal amplifier 3, a smoke placing clamp 6, a hollow heat preservation pipe 7, a platinum thermal resistance temperature sensor I8, a resistance box 9, a detection device 10, a Cambridge filter 11, a smoke catcher 12 and a precision electronic balance 13, the suction module comprises a suction device 14 and a stepping motor control device 15, the suction device 14 comprises a spiral metal rod 39, a suction piston 40, an air outlet one-way valve 41, an air inlet one-way valve 42 and an adjustable capacity suction pipe 43, and the power module comprises a high-precision adjustable stabilized voltage power supply 4;
The touch screen 1 is electrically connected with the MCU controller 2, the MCU controller 2 is electrically connected with the high-precision adjustable stabilized voltage supply 4, the MCU controller 2 is electrically connected with the stepping motor control device 15, the stepping motor control device 15 is connected with the suction piston 40 through a spiral metal rod 39, the suction piston 40 can be hermetically accommodated in the adjustable capacity suction pipe 43, one end of the adjustable capacity suction pipe 43 is connected to the movable sealing of the suction piston 40, the other end of the adjustable capacity suction pipe is a sealing surface of two air holes, the lower end air hole is designed to be in sealing connection with the left end of the flue gas catcher 12 through a plastic pipe, the upper end air hole is designed to be in direct contact with air through the air outlet one-way valve 41, the suction time is set on the touch screen 1, the MCU controller 2 is fed back to the stepping motor control device 15, the stepping motor control device 15 is connected with the spiral metal rod 39 to adjust the position of the suction piston 40 in the adjustable capacity suction pipe 43, and the suction time and the suction flow rate of the adjustable capacity suction pipe 43 are controlled; the detection device 10 is electrically connected to the MCU controller 2, and the MCU controller 2 controls the detection device 10 to be powered off and cooled according to the received difference value between the feedback temperature and the preset voltage, and the temperature is controlled to be a preset temperature value by pressurizing and heating; the signal amplifier 3 is electrically connected to the MCU controller 2, the slide sheet of the high-precision sliding rheostat 5 is electrically connected to the positive electrode of the high-precision adjustable stabilized voltage power supply 4, the negative electrode of the high-precision adjustable stabilized voltage power supply 4 is connected with the detection device 10 through a lead 24, two equivalent resistors of a resistor I44 and a resistor II45 are fixed in the resistor box 9, and the resistor I44, the resistor II45, the high-precision sliding rheostat 5 and components in the detection device 10 form a bridge circuit; the air outlet channel 33 of the detection device 10 is connected with the right end of the smoke catcher 12 through the hollow heat-insulating pipe 7, a precise electronic balance 13 is arranged below the smoke catcher 12, the air inlet channel 20 in the detection device 10 is connected with the smoke placing clamp 6 through the hollow heat-insulating pipe 7, a platinum thermal resistance temperature sensor I8 connected with the MCU controller 2 is hermetically arranged in the hollow heat-insulating pipe 7, smoke generated by tobacco products placed on the smoke placing clamp 6 enters the detection device 10 through the hollow heat-insulating pipe 7, and the platinum thermal resistance temperature sensor I8 is used for feeding back the initial smoke temperature to the MCU controller 2.
Specifically, the detection device 10 includes a stainless steel insulation box 16, a metal body 19, an air inlet channel 20, a metal elastic sheet I21, a non-sensitive stainless steel metal heating rod 22, a horizontal air channel 23, a lead 24, a compression bolt 25, a gold-plated miniature spiral heat-sensitive element I26, a vertical parallel tube I27, an orifice I28, an air distribution channel I29, a compression bolt II30, a gold-plated miniature spiral heat-sensitive element II31, a vertical parallel tube II32, an air outlet channel 33, a locking pin 34, a platinum thermal resistance temperature sensor II35, an orifice II36 and an air distribution channel II37;
the detection device 10 adopts a stainless steel cylinder structure, two vertical parallel pipes I27 and II32 with threads at the upper ends are arranged on the detection device, a gold-plated miniature spiral heat-sensitive element I26 and a gold-plated miniature spiral heat-sensitive element II31 are respectively sealed in the vertical parallel pipes I27 and II32 by a compression bolt I25 and II30, a horizontal air passage 23 is communicated with the bottoms of the vertical parallel pipes I27 and II32, two ends of the horizontal air passage 23 are respectively communicated with a small transverse hole and respectively led out from side holes at the left end and the right end of a stainless steel heat preservation box 16 to form an air inlet passage 20 and an air outlet passage 33, the air inlet passage 20 and the air outlet passage 33 of the horizontal air passage 23 are respectively elastically sealed by a metal elastic sheet I21 and a metal elastic sheet II38, and the left sides of the vertical parallel pipes I27 and II32 are respectively connected with a gas dividing passage I29 and a gas dividing passage II37, and are just communicated with the vertical parallel pipes I27 and II32 and the horizontal air passage 23; the bottom of the stainless steel heat preservation box 16 is locked with a metal heating block, namely a metal body 19, by a locking pin 34, two non-sensitive stainless steel metal heating rods 22 are averagely arranged on the metal body 19 at the lower end of a horizontal air passage 23, a platinum thermal resistance temperature sensor II35 electrically connected with the MCU controller 2 is arranged in the center of the metal body 19, the platinum thermal resistance temperature sensor II35 is used for feeding back a temperature signal of the horizontal air passage 23 to the MCU controller 2, the negative electrode of the high-precision adjustable stabilized voltage supply 4 is connected with a gold-plated miniature spiral thermosensitive element I26 in the detection device 10 through a lead 24, a resistor I44, a resistor II45 and the gold-plated miniature spiral thermosensitive element I26 in the detection device 10, a gold-plated miniature spiral thermosensitive element II31 in the detection device 10 and a high-precision sliding rheostat 5 form a bridge circuit, an air outlet passage 33 in the detection device 10 is connected with the right end of a smoke catcher 12 through a hollow heat preservation tube 7, and the vertical parallel tube I27, a vertical parallel tube II32, a horizontal air dividing passage I29 and a air dividing passage II37 are processed on the metal body 19, and the vertical parallel tube II is arranged on the smoke clamp 6 to produce a vertical air passage 23, and the two parallel guide-wire 16 and the vertical air passage 16 is led out of the vertical parallel smoke guide wire 16; an orifice I28 is designed at the connection part of the air dividing channel I29 and the vertical parallel pipe, and an orifice II36 is designed at the connection part of the air dividing channel II37 and the vertical parallel pipe; the components are arranged in a stainless steel heat preservation box 16, a heat preservation silicon cotton plate 17 is arranged around the inside of the stainless steel heat preservation box 16, and the internal space surrounded by the silicon cotton plate 17 is filled with micro glass beads 18 to form a bath constant temperature mode;
The lead 24 led out of the gold-plated miniature spiral thermosensitive element I26 is connected with a resistor I44 in series, and the serial node is A; the other end of the resistor I44 is connected to the maximum resistance end of the high-precision slide rheostat 5, and the connection point is B; the other maximum resistance end of the high-precision slide rheostat 5 is connected in series with a lead 24 led out of a gold-plated miniature spiral thermosensitive element II31, and the series connection node is C; the other end of the lead 24 of the gold-plated miniature spiral thermosensitive element II31 is connected in series with a resistor II45, and the serial node is D; the other end of the resistor II45 is connected with a gold-plated miniature spiral thermosensitive element I26, and the node is E; the signal acquisition end of the signal amplifier 3 is electrically connected to the node A and the node D respectively.
Preferably, the volumes of the vertical parallel pipes I27 and II32 are smaller than 100 μl, the vertical parallel pipes I and II are cylindrical, and the preset temperature is maintained at 100 ℃ at the initial working state and higher than the flue gas temperature.
Preferably, the stepper motor control device 15 includes a stepper motor 46 and a stepper motor controller 47 adapted to the stepper motor 46, and a command can be input on the touch screen 1 to enable the stepper motor controller 47 to directly control the stepper motor 46 to adjust the rotation speed and the torque value, and the spiral metal rod 39 is linked to adjust the position of the suction piston 40 in the suction tube 43 with adjustable capacity, so as to control the suction time and the suction flow rate of the suction tube 43 with adjustable capacity.
Preferably, the gold-plated micro spiral heat-sensitive element I26 and the gold-plated micro spiral heat-sensitive element II31 are tungsten wires or platinum wires or come wires or tungsten wires or platinum-tungsten alloy wires.
Preferably, the metal spring plate I21 and the metal spring plate II38 are magnesium aluminum alloy.
The measuring method of the tobacco product smoke specific heat capacity measuring device comprises the following steps:
a. the detection device 10 is installed, and the tobacco products are placed in the tobacco placing clamp 6; the high-precision adjustable stabilized voltage supply 4 is started, a bridge circuit is formed by the gold-plated miniature spiral heat-sensitive element I26, the gold-plated miniature spiral heat-sensitive element II31, the resistor I44, the resistor II45 and the high-precision slide rheostat 5 in a designed circuit, and the high-precision adjustable stabilized voltage supply 4 provides the gold-plated miniature spiral heat-sensitive element I26 and the gold-plated miniature spiralThe heat sensitive element II31 provides power to continuously heat, and adjusts the slide sheet of the high-precision slide rheostat 5 after the temperature is stable, so that the voltage U at two ends of the A, D contact point AD =0v; the lead 24 led out of the gold-plated miniature spiral thermosensitive element I26 is connected with a resistor I44 in series, and the serial node is A; the other end of the lead 24 led out by the gold-plated miniature spiral thermosensitive element II31 is connected in series to a resistor II45, and the serial node is D; after the suction device 14 is started, the flue gas passes through the hollow heat-insulating sleeve 7, the temperature of the flue gas is detected by the platinum thermal resistance temperature sensor I8 and is stored in the MCU controller 2, and the flue gas flows into the detection device 10 for further detection due to suction force;
b. Setting the temperature of a horizontal air passage 23 on the touch screen 1, and correspondingly heating and cooling the noninductive stainless steel metal heating rod 22 under the control of the MCU controller 2, wherein when the temperature fed back by the platinum thermal resistance temperature sensor II35 is higher than a preset temperature, the power is cut off for cooling, and when the temperature is lower than the preset temperature, the power is supplied for heating, so that the temperature of the horizontal air passage 23 is kept at the set temperature;
c. after the platinum thermal resistance temperature sensor II35 detects that the temperature of the horizontal air passage 23 is stable, feeding back to the MCU controller 2, according to the suction condition set by the touch screen 1, the stepping motor control device 15 is connected with the suction piston 40 through the spiral metal rod 39, the suction piston 40 can be hermetically contained in the suction pipe 43 with adjustable capacity, the suction time is set on the display screen, the display screen is fed back to the MCU controller 2, the stepping motor controller 47 adapted to the stepping motor 46 is controlled by sending out pulse signals to adjust the rotating speed and the torque value, the spiral metal rod 39 is linked to adjust the position of the suction piston 40 in the suction pipe 43 with adjustable capacity, and the suction time and the suction force are adjusted;
d. after the suction device 14 is started, the flue gas passes through the hollow heat-insulating sleeve 7, the temperature of the flue gas is detected by the platinum thermal resistance temperature sensor I8 and stored in the MCU controller 2, the metal spring plate I21 and the metal spring plate II38 are opened due to the air pressure difference, and the flue gas generated by tobacco products enters the horizontal air passage 23 through the air inlet passage 20 and flows into the vertical parallel pipe I27 and the vertical parallel pipe II 32; the heat of the gold-plated micro spiral heat-sensitive element I26 and the gold-plated micro spiral heat-sensitive element II31 is dissipated by heat conduction of the flue gas, and the gold is plated micro The resistance of the spiral thermosensitive element I26 and the resistance of the gold-plated miniature spiral thermosensitive element II31 are reduced, the voltage at two ends of a A, D joint are unbalanced, and the relation between the smoke heat conductivity coefficient and the voltage at two ends of a A, D joint is that:wherein lambda is m Is the heat conductivity coefficient of the flue gas, l is the effective length of the gold-plated micro spiral heat-sensitive element I26 and the gold-plated micro spiral heat-sensitive element II31, r C Radius r of vertical parallel tube I27 and vertical parallel tube II32 n Radius R of the gold-plated micro spiral heat-sensitive element I26 or the gold-plated micro spiral heat-sensitive element II31 S Alpha is the temperature change coefficient of the gold-plated micro spiral thermosensitive element I26 and the gold-plated micro spiral thermosensitive element II31 along with the temperature, I is half of the current value displayed by the high-precision adjustable stabilized voltage supply 4, R 0 The resistance values of the gold-plated micro spiral heat-sensitive element I26 and the gold-plated micro spiral heat-sensitive element II31 are no current, U is the voltage displayed by the high-precision stabilized voltage supply 4, U AD For the signal amplifier 3 to detect the voltage signal of the A, D junction, t c Is the temperature of the vertical parallel tube I27 and the vertical parallel tube II32 at the time of stabilization;
e. after the heat conductivity coefficient of the smoke is measured, the tobacco product is taken down from the smoke placing clamp 6, the stepping motor control device 15 is controlled by the MCU controller 2 again to control the suction device 14 to perform air suction, so that the smoke in the detection device 10 flows into the smoke capturing device from the detection device 10 due to the air pressure difference, namely, the smoke is collected onto the Cambridge filter 11 in the smoke capturing device 12, and the smoke quality is measured by the high-precision electronic scale;
f. According to the energy Q absorbed by the flue gas under the condition of heat exchange 0 =cmΔt, calculateWherein C is the specific heat capacity of flue gas, t 0 For the initial flue gas temperature, t c For the temperatures of the vertical parallel tube I27 and the vertical parallel tube II32 at the time of stabilization, deltaT is the initial flue gas temperature T 0 With temperatures of vertical parallel tube I27 and vertical parallel tube II32 at steady statet c T is the difference of (t) n The balance temperature of the thermosensitive element under the action of current, m is the measured smoke mass, R S Alpha is the temperature change coefficient of the gold-plated micro spiral thermosensitive element I26 and the gold-plated micro spiral thermosensitive element II31 along with the temperature, I is half of the current value displayed by the high-precision adjustable stabilized voltage supply 4, R 0 The resistance values of the gold-plated micro spiral heat-sensitive element I26 and the gold-plated micro spiral heat-sensitive element II31 are no current, U is the voltage displayed by the high-precision stabilized voltage supply 4, U AD The voltage signal at the A, D junction is detected for the signal amplifier 3.
The beneficial effects of the invention are as follows: the tobacco product smoke specific heat capacity detection device established through reasonable constitution and connection can be effectively used for measuring the tobacco product smoke specific heat capacity; the specific heat capacity research method of the smoke is provided, the specific heat capacity is represented in real time by the mass and the temperature of the smoke actually sucked by a single port, the measurement process is simplified, and the heat values taken away by different suction forces in the suction process are represented by the specific heat capacity of the smoke, so that technical parameter support can be provided for the development and design of smoking sets; meanwhile, the specific heat capacity of the tobacco product smoke can be measured by adopting a related method through the specific heat capacity detection device of the tobacco product smoke, and the specific heat capacity detection device is specifically expressed as follows: the change of the resistance of the heat sensitive element in the measuring cavity is caused by the mass of the smoke and the temperature difference of the smoke before and after balancing, the generated voltage difference is amplified by an amplifier and transmitted to the MCU controller 2, and the heat quantity transferred to the smoke by the heat sensitive element is equal to the heat quantity value increased by the smoke to be processed and converted into the smoke specific heat capacity value, so that the measurement of the smoke specific heat capacity of the tobacco product is realized.
Drawings
FIG. 1 is a block diagram of the structure of the present invention;
FIG. 2 is a cross-sectional view of a detection device according to the present invention;
FIG. 3 is a block diagram of a suction apparatus according to the present invention;
FIG. 4 is a cross-sectional view of the resistor box of the present invention;
FIG. 5 is a schematic diagram of a control device for a stepper motor according to the present invention;
fig. 6 is a schematic diagram of a connection node according to the present invention.
The reference numerals in the drawings: 1-touch screen, 2-MCU controller, 3-signal amplifier, 4-high precision adjustable stabilized voltage supply, 5-high precision slide rheostat, 6-smoke placing clamp, 7-hollow heat preservation pipe, 8-platinum resistance temperature sensor I, 9-resistance box, 10-detection device, 11-Cambridge filter, 12-smoke catcher, 13-precision electronic balance, 14-suction device, 15-stepper motor control device, 16-stainless steel heat preservation box, 17-silicon cotton plate, 18-miniature glass bead, 19-metal body, 20-air inlet channel, 21-metal spring I, 22-non-inductive stainless steel metal heating rod, 23-horizontal air channel, 24-wire, the device comprises a 25-compression bolt I, a 26-gold-plated miniature spiral thermal sensitive element I, a 27-vertical parallel tube I, a 28-orifice I, a 29-air distribution channel I, a 30-compression bolt II, a 31-gold-plated miniature spiral thermal sensitive element II, a 32-vertical parallel tube II, a 33-air outlet channel, a 34-locking pin, a 35-platinum thermal resistance temperature sensor II, a 36-orifice II, a 37-air distribution channel II, a 38-metal spring piece II, a 39-spiral metal rod, a 40-suction piston, a 41-air outlet check valve, a 42-air inlet check valve, a 43-adjustable capacity suction tube, a 44-resistance I, a 45-resistance II, a 46-stepper motor and a 47-stepper motor controller.
Detailed Description
The invention will be further described with reference to the drawings and examples, but the invention is not limited to the scope.
Example 1: as shown in fig. 1-6, a device for measuring the specific heat capacity of smoke of tobacco products comprises a control module, a suction module, a detection module and a power module;
the detection module is electrically connected with the control module, the control module is electrically connected with the suction module, the detection module, the control module and the suction module are electrically connected with the power supply module, and the detection module is hermetically connected with the suction module;
the detection module is used for detecting a smoke temperature signal, temperature change of the thermosensitive element, a device temperature signal, collecting smoke and measuring the quality of the collected smoke;
the control module is used for receiving temperature signals of the detection device in the detection module, comparing the temperature signals detected by the detection module with the preset temperature in the detection module, controlling the detection module to supply power to raise the temperature and lower the temperature by switching on and off the power supply through the control power module, so that the detection device in the detection module is maintained at the preset temperature, controlling the suction time and the suction capacity of the suction module on the tobacco product through the control power module to switch on and off the suction module, and finally calculating the specific heat capacity of the tobacco product smoke according to the detection data of the detection module;
The control module includes: the touch screen 1, the MCU controller 2 and the high-precision slide rheostat 5, wherein the detection module comprises a signal amplifier 3, a smoke placing clamp 6, a hollow heat preservation pipe 7, a platinum thermal resistance temperature sensor I8, a resistance box 9, a detection device 10, a Cambridge filter 11, a smoke catcher 12 and a precision electronic balance 13, the suction module comprises a suction device 14 and a stepping motor control device 15, the suction device 14 comprises a spiral metal rod 39, a suction piston 40, an air outlet one-way valve 41, an air inlet one-way valve 42 and an adjustable capacity suction pipe 43, and the power module comprises a high-precision adjustable stabilized voltage power supply 4;
the touch screen 1 is electrically connected with the MCU controller 2, the MCU controller 2 is electrically connected with the high-precision adjustable stabilized voltage supply 4, the MCU controller 2 is electrically connected with the stepping motor control device 15, the stepping motor control device 15 is connected with the suction piston 40 through the spiral metal rod 39, the suction piston 40 can be hermetically accommodated in the suction pipe 43 with adjustable capacity, one end of the suction pipe 43 with adjustable capacity is connected to the movable sealing surface of the suction piston 40, the other end of the suction pipe is a sealing surface of two air holes, the lower end air hole is designed to be in sealing connection with the left end of the smoke catcher 12 through a plastic pipe, the upper end air hole is designed to be in direct contact with air through the air inlet one-way valve 41, the suction time is set on the touch screen 1, the MCU controller 2 is fed back to the MCU controller 2, the pulse signal is sent to control the stepping motor control device 15 to adjust the rotating speed and the torque value, the stepping motor control device 15 is linked with the spiral metal rod 39 to adjust the position of the suction piston 40 in the adjustable capacity suction pipe 43, after the suction is started, the air inlet one-way valve 42 is fed into the air, the motor and the controller 15 controls the movement of the spiral metal rod 39 to control the movement of the suction piston 40, the movement of the suction piston 40 is controlled, the movement is finished, the air is controlled, the air is stopped, the movement, the upper end of the adjustable suction pipe 43 is in one time and the suction capacity and the suction flow is adjusted, the suction time is small, and the suction time can be adjusted is adjusted; the detection device 10 is electrically connected to the MCU controller 2, and the MCU controller 2 controls the detection device 10 to be powered off and cooled according to the received difference value between the feedback temperature and the preset voltage, and the temperature is controlled to be a preset temperature value by pressurizing and heating; the signal amplifier 3 is electrically connected to the MCU controller 2, the slide sheet of the high-precision sliding rheostat 5 is electrically connected to the positive electrode of the high-precision adjustable stabilized voltage power supply 4, the negative electrode of the high-precision adjustable stabilized voltage power supply 4 is connected with the detection device 10 through a lead 24, two equivalent resistors of a resistor I44 and a resistor II45 are fixed in the resistor box 9, and the resistor I44, the resistor II45, the high-precision sliding rheostat 5 and components in the detection device 10 form a bridge circuit; the air outlet channel 33 of the detection device 10 is connected with the right end of the smoke catcher 12 through the hollow heat-insulating pipe 7, a precise electronic balance 13 is arranged below the smoke catcher 12, the air inlet channel 20 in the detection device 10 is connected with the smoke placing clamp 6 through the hollow heat-insulating pipe 7, a platinum thermal resistance temperature sensor I8 connected with the MCU controller 2 is hermetically arranged in the hollow heat-insulating pipe 7, smoke generated by tobacco products placed on the smoke placing clamp 6 enters the detection device 10 through the hollow heat-insulating pipe 7, and the platinum thermal resistance temperature sensor I8 is used for feeding back the initial smoke temperature to the MCU controller 2.
Further, the detection device 10 comprises a stainless steel heat preservation box 16, a metal body 19, an air inlet channel 20, a metal elastic sheet I21, a non-sensitive stainless steel metal heating rod 22, a horizontal air channel 23, a lead 24, a compression bolt 25, a gold-plated miniature spiral heat-sensitive element I26, a vertical parallel tube I27, an orifice I28, an air distribution channel I29, a compression bolt II30, a gold-plated miniature spiral heat-sensitive element II31, a vertical parallel tube II32, an air outlet channel 33, a locking pin 34, a platinum thermal resistance temperature sensor II35, an orifice II36 and an air distribution channel II37;
the detection device 10 adopts a stainless steel cylinder structure, two vertical parallel pipes I27 and II32 with screw threads at the upper ends are arranged on the detection device, a platinum thermal resistance temperature sensor II35 below a horizontal air passage 23 in the detection device 10 is electrically connected to an MCU controller 2, the difference value between the feedback temperature received by the MCU controller 2 and the preset voltage controls the voltage of a non-inductive stainless steel metal heating rod 22, the temperature is reduced by power failure and the temperature is increased by pressurization, the temperature is controlled at the preset temperature value, a gold-plated miniature helical heat-sensitive element I26 and a gold-plated miniature helical heat-sensitive element II31 are respectively sealed in a vertical parallel pipe I27 and a vertical parallel pipe II32 by a compression bolt I25 and a compression bolt II30, the horizontal air passage 23 is communicated with the bottoms of the vertical parallel pipe I27 and the vertical parallel pipe II32, two ends of the horizontal air passage 23 are respectively communicated with a small transverse hole, an air inlet passage 20 and an air outlet passage 33 are respectively formed by leading out of side holes at the left end and the right end of a stainless steel heat-preserving box 16, the 20 and the air outlet passage 33 are respectively connected with a metal elastic spring plate I21 and a metal spring plate 38 respectively, one side of the vertical parallel pipe I and one side of the vertical parallel pipe I32 is respectively, and one side of the vertical parallel pipe I and one side of the vertical pipe I27 is respectively connected with the vertical parallel pipe II32, and the vertical parallel pipe I is respectively, and the vertical pipe II is respectively; the bottom of the stainless steel heat preservation box 16 is locked with a metal heating block, namely a metal body 19, by a locking pin 34, two non-sensitive stainless steel metal heating rods 22 are averagely arranged on the metal body 19 at the lower end of a horizontal air passage 23, a platinum thermal resistance temperature sensor II35 electrically connected with the MCU controller 2 is arranged in the center of the metal body 19, the platinum thermal resistance temperature sensor II35 is used for feeding back a temperature signal of the horizontal air passage 23 to the MCU controller 2, the negative electrode of the high-precision adjustable stabilized voltage supply 4 is connected with a gold-plated miniature spiral thermosensitive element I26 in the detection device 10 through a lead 24, a resistor I44, a resistor II45 and the gold-plated miniature spiral thermosensitive element I26 in the detection device 10, a gold-plated miniature spiral thermosensitive element II31 in the detection device 10 and a high-precision sliding rheostat 5 form a bridge circuit, an air outlet passage 33 in the detection device 10 is connected with the right end of a smoke catcher 12 through a hollow heat preservation tube 7, and the vertical parallel tube I27, a vertical parallel tube II32, a horizontal air dividing passage I29 and a air dividing passage II37 are processed on the metal body 19, and the vertical parallel tube II is arranged on the smoke clamp 6 to produce a vertical air passage 23, and the two parallel guide-wire 16 and the vertical air passage 16 is led out of the vertical parallel smoke guide wire 16; the connecting part of the air distribution channel I29 and the vertical parallel tube is provided with an orifice I28, the connecting part of the air distribution channel II37 and the vertical parallel tube is provided with an orifice II36 (the orifice I28 and the orifice II36 respectively prevent the influence of air flow fluctuation on the heat of the gold-plated miniature spiral heat-sensitive element I26 and the gold-plated miniature spiral heat-sensitive element II 31; when the suction device sucks, the metal spring plate I18 and the metal spring plate II19 are opened due to air pressure difference, and when the suction is stopped, the metal spring plate I21 and the metal spring plate II38 seal the air inlet channel 20 and the air outlet channel 33 due to the elastic property, so as to prevent the concentration change of the air diffusing outwards); the components are arranged in a stainless steel heat preservation box 16, a heat preservation silicon cotton plate 17 is arranged around the inside of the stainless steel heat preservation box 16, and the internal space surrounded by the silicon cotton plate 17 is filled with micro glass beads 18 to form a bath constant temperature mode;
The lead 24 led out of the gold-plated miniature spiral thermosensitive element I26 is connected with a resistor I44 in series, and the serial node is A; the other end of the resistor I44 is connected to the maximum resistance end of the high-precision slide rheostat 5, and the connection point is B; the other maximum resistance end of the high-precision slide rheostat 5 is connected in series with a lead 24 led out of a gold-plated miniature spiral thermosensitive element II31, and the series connection node is C; the other end of the lead 24 of the gold-plated miniature spiral thermosensitive element II31 is connected in series with a resistor II45, and the serial node is D; the other end of the resistor II45 is connected with a gold-plated miniature spiral thermosensitive element I26, and the node is E; the signal acquisition end of the signal amplifier 3 is electrically connected to the node A and the node D respectively.
Further, the volumes of the vertical parallel pipes I27 and II32 are smaller than 100 μl, the vertical parallel pipes I and II are cylindrical, and the preset temperature is maintained at 100 ℃ at the initial working state and higher than the flue gas temperature.
Further, the stepper motor control device 15 includes a stepper motor 46 and a stepper motor controller 47 adapted to the stepper motor 46, and a command can be input on the touch screen 1 to enable the stepper motor controller 47 to directly control the stepper motor 46 to adjust the rotation speed and the torque value, and the spiral metal rod 39 is linked to adjust the position of the suction piston 40 in the suction tube 43 with adjustable capacity, so as to control the suction time and the suction flow rate of the suction tube 43 with adjustable capacity.
Further, the gold-plated micro spiral heat-sensitive element I26 and the gold-plated micro spiral heat-sensitive element II31 are tungsten wires or platinum wires or come wires or tungsten wires or platinum-tungsten alloy wires.
Further, the metal spring plate I21 and the metal spring plate II38 are magnesium aluminum alloy.
The measuring method of the tobacco product smoke specific heat capacity measuring device comprises the following steps:
a. the detection device 10 is installed, and the tobacco products are placed in the tobacco placing clamp 6; the high-precision adjustable stabilized voltage supply 4 is started, a bridge circuit is formed by the gold-plated miniature spiral heat-sensitive element I26, the gold-plated miniature spiral heat-sensitive element II31, the resistor I44, the resistor II45 and the high-precision slide rheostat 5 in a design circuit, the high-precision adjustable stabilized voltage supply 4 supplies power to the gold-plated miniature spiral heat-sensitive element I26 and the gold-plated miniature spiral heat-sensitive element II31 for continuous heating, and after the temperature is stable, a sliding sheet of the high-precision slide rheostat 5 is adjusted, so that voltage U at two ends of a A, D contact point is enabled to be U AD =0v; the lead 24 led out of the gold-plated miniature spiral thermosensitive element I26 is connected with a resistor I44 in series, and the serial node is A; the other end of the lead 24 led out by the gold-plated miniature spiral thermosensitive element II31 is connected in series to a resistor II45, and the serial node is D; after the suction device 14 is started, the flue gas passes through the hollow heat-insulating sleeve 7, the temperature of the flue gas is detected by the platinum thermal resistance temperature sensor I8 and is stored in the MCU controller 2, and the flue gas flows into the detection device 10 for further detection due to suction force;
b. Setting the temperature of a horizontal air passage 23 on the touch screen 1, and correspondingly heating and cooling the noninductive stainless steel metal heating rod 22 under the control of the MCU controller 2, wherein when the temperature fed back by the platinum thermal resistance temperature sensor II35 is higher than a preset temperature, the power is cut off for cooling, and when the temperature is lower than the preset temperature, the power is supplied for heating, so that the temperature of the horizontal air passage 23 is kept at the set temperature;
c. after the platinum thermal resistance temperature sensor II35 detects that the temperature of the horizontal air passage 23 is stable, feeding back to the MCU controller 2, according to the suction condition set by the touch screen 1, the stepping motor control device 15 is connected with the suction piston 40 through the spiral metal rod 39, the suction piston 40 can be hermetically contained in the suction pipe 43 with adjustable capacity, the suction time is set on the display screen, the display screen is fed back to the MCU controller 2, the stepping motor controller 47 adapted to the stepping motor 46 is controlled by sending out pulse signals to adjust the rotating speed and the torque value, the spiral metal rod 39 is linked to adjust the position of the suction piston 40 in the suction pipe 43 with adjustable capacity, and the suction time and the suction force are adjusted;
d. after the suction device 14 is started, the flue gas passes through the hollow heat-insulating sleeve 7, the temperature of the flue gas is detected by the platinum thermal resistance temperature sensor I8 and stored in the MCU controller 2, the metal spring plate I21 and the metal spring plate II38 are opened due to the air pressure difference, and the flue gas generated by tobacco products enters the horizontal air passage 23 through the air inlet passage 20 and flows into the vertical parallel pipe I27 and the vertical parallel pipe II 32; the heat conduction of the flue gas ensures that the heat of the gold-plated micro spiral heat-sensitive element I26 and the gold-plated micro spiral heat-sensitive element II31 is dissipated, the resistance of the gold-plated micro spiral heat-sensitive element I26 and the gold-plated micro spiral heat-sensitive element II31 is reduced, the voltage at two ends of a A, D joint is unbalanced, and the relation between the heat conduction coefficient of the flue gas and the voltage at two ends of a A, D joint is that: Wherein lambda is m Is the heat conductivity coefficient of the flue gas, l is the effective length of the gold-plated micro spiral heat-sensitive element I26 and the gold-plated micro spiral heat-sensitive element II31, r C Radius r of vertical parallel tube I27 and vertical parallel tube II32 n Radius R of the gold-plated micro spiral heat-sensitive element I26 or the gold-plated micro spiral heat-sensitive element II31 S Alpha is the temperature change coefficient of the gold-plated micro spiral thermosensitive element I26 and the gold-plated micro spiral thermosensitive element II31 along with the temperature, I is half of the current value displayed by the high-precision adjustable stabilized voltage supply 4, R 0 The resistance values of the gold-plated micro spiral heat-sensitive element I26 and the gold-plated micro spiral heat-sensitive element II31 are no current, U is the voltage displayed by the high-precision stabilized voltage supply 4, U AD For the signal amplifier 3 to detect the voltage signal of the A, D junction, t c Is the temperature of the vertical parallel tube I27 and the vertical parallel tube II32 at the time of stabilization;
e. after the heat conductivity coefficient of the smoke is measured, the tobacco product is taken down from the smoke placing clamp 6, the stepping motor control device 15 is controlled by the MCU controller 2 again to control the suction device 14 to perform air suction, so that the smoke in the detection device 10 flows into the smoke capturing device from the detection device 10 due to the air pressure difference, namely, the smoke is collected onto the Cambridge filter 11 in the smoke capturing device 12, and the smoke quality is measured by the high-precision electronic scale;
f. According to the energy Q absorbed by the flue gas under the condition of heat exchange 0 =cmΔt, calculateWherein C is the specific heat capacity of flue gas, t 0 For the initial flue gas temperature, t c For the temperatures of the vertical parallel tube I27 and the vertical parallel tube II32 at the time of stabilization, deltaT is the initial flue gas temperature T 0 With temperature t of vertical parallel tube I27 and vertical parallel tube II32 at steady state c T is the difference of (t) n The balance temperature of the thermosensitive element under the action of current, m is the measured smoke mass, R S Alpha is the temperature change coefficient of the gold-plated micro spiral thermosensitive element I26 and the gold-plated micro spiral thermosensitive element II31 along with the temperature, I is half of the current value displayed by the high-precision adjustable stabilized voltage supply 4, R 0 The resistance values of the gold-plated micro spiral heat-sensitive element I26 and the gold-plated micro spiral heat-sensitive element II31 are no current, U is the voltage displayed by the high-precision stabilized voltage supply 4, U AD The voltage signal at the A, D junction is detected for the signal amplifier 3.
The working principle of the invention is as follows:
1. bridge stabilization U composed of gold-plated micro spiral thermosensitive element I26, gold-plated micro spiral thermosensitive element II31, resistor I44, resistor II45, and high-precision slide rheostat 5 AD ＝0V；
2. After the flue gas is introduced, the flue gas is conducted to the measurement cavity to absorb heat of the thermosensitive element, so that the voltage of the A, D junction is changed:
Wherein ΔRm is the resistance value of the thermosensitive element; r is R S The resistance value of the resistor I44 or the resistor II 45; u is the voltage of the high-precision adjustable stabilized power supply 4;
3. heat transferred from the thermosensitive element to the measured gas in the measuring cavity in unit time
Wherein lambda is m Is the heat conductivity coefficient of the flue gas; l is the effective length of the gold-plated micro spiral heat sensitive element I26 and the gold-plated micro spiral heat sensitive element II 31; r is (r) n The radius of the gold-plated micro spiral heat-sensitive element I26 or the gold-plated micro spiral heat-sensitive element II 31; r is (r) c To measure the cavity radius; t is t n The temperature of the thermosensitive element reaches the equilibrium temperature under the action of current; t is t c Is the temperature of the vertical parallel tube I27 and the vertical parallel tube II32 at steady state.
b. Gold-plated micro spiral heat-sensitive element heating value:
Q 1 ＝0.24I 2 R n (3)
wherein R is 1 The resistance value of the thermosensitive element after being electrified is that I is the current flowing through the thermosensitive element (the high-precision adjustable stabilized voltage supply 4 displays half of the current)
c. The heat of the thermistor is transferred outwards by the heat conduction and heat exchange principle, so that the heat absorbed in the flue gas heat transfer process is converted, and when the heat is balanced, Q is present 0 ＝Q 1 The method comprises the following steps:
and because of R n ＝R 0 (1+αt n )，Carrying out the above steps;
wherein alpha is the temperature change coefficient of the resistance value of the thermosensitive element, R 0 The resistance values of the gold-plated micro spiral heat-sensitive element I26 and the gold-plated micro spiral heat-sensitive element II31 are the same when no current is applied.
Let the structural parameters
And neglecting the higher order infinitely small, then:
and due to
And (3) carrying out (6) and (8) into (1) to obtain the finished product:
and then the heat Q is absorbed by the detection device according to the specific heat capacity and the quality of the flue gas and the flue gas 0 Relationship Q between 0 ＝Cm(t c -t 0 ) Obtaining:
i.e. specific heat capacity of flue gas
Carrying (9) into (11) finishing (12)
Wherein C is the specific heat capacity of flue gas, t 0 For the initial flue gas temperature, t c To stabilize the temperatures of the vertical parallel tube I27 and the vertical parallel tube II32, t n The balance temperature of the thermosensitive element under the action of current, m is the measured smoke mass, R S Is the resistance of the resistor I44 or the resistor II45, and alpha is platingThe temperature change coefficients of the gold-plated micro spiral thermosensitive element I26 and the gold-plated micro spiral thermosensitive element II31 along with temperature change coefficient are that I is half of the current value displayed by the high-precision adjustable stabilized voltage supply 4, and R is the same as the current value displayed by the high-precision adjustable stabilized voltage supply 4 0 The resistance values of the gold-plated micro spiral heat-sensitive element I26 and the gold-plated micro spiral heat-sensitive element II31 are no current, U is the voltage displayed by the high-precision stabilized voltage supply 4, U AD The voltage signal at the A, D junction is detected for the signal amplifier 3.
The specific heat capacity test platform device is constructed, and the specific heat capacity of the flue gas is measured by a related method, and the specific heat capacity test platform device is concretely embodied as follows: according to the difference of the flue gas temperature, the resistance value of the vertical parallel Guan Nare thermistor in the detection device is changed, the heat value of the gas to be detected, which is uploaded to the detection device from the thermosensitive element, can be obtained by utilizing a thermal resistance formula and the temperature difference between the thermistor and the inner wall of the cavity in a heat balance state, the initial flue gas temperature and the temperature of the flue gas after heat balance are measured, the heat on the thermistor is outwards transferred according to a heat conduction and heat exchange principle, so that the heat absorbed in the flue gas heat transfer process is converted, the heat absorption front and back temperature difference and the mass of the flue gas are represented, and the specific heat capacity of the flue gas can be obtained by calculation.
The method for researching the specific heat capacity of the smoke is provided, the specific heat capacity is represented in real time by the mass and the temperature of the single-port actual smoke, the measurement process is simplified, the specific heat capacity of the smoke is used for representing the heat values taken away by different smoking forces in the smoking process, technical parameter support can be provided for the development and design of the smoking set, and important reference is provided for improving the parameter accuracy of the engineering design of novel cigarettes and smoking sets, so that the method has great significance for guiding the development of the novel cigarette smoking set.
While the present invention has been described in detail with reference to the drawings, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.
Claims (5)
1. The utility model provides a tobacco product flue gas specific heat capacity measuring device which characterized in that: the device comprises a control module, a suction module, a detection module and a power supply module;
the detection module is electrically connected with the control module, the control module is electrically connected with the suction module, the detection module, the control module and the suction module are electrically connected with the power supply module, and the detection module is hermetically connected with the suction module;
the control module includes: the touch screen (1), the MCU controller (2) and the high-precision slide rheostat (5), the detection module comprises a signal amplifier (3), a smoke placing clamp (6), a hollow heat preservation pipe (7), a platinum thermal resistance temperature sensor I (8), a resistor box (9), a detection device (10), a Cambridge filter disc (11), a smoke catcher (12) and a precision electronic balance (13), the suction module comprises a suction device (14) and a stepping motor control device (15), the suction device (14) comprises a spiral metal rod (39), a suction piston (40), an air outlet one-way valve (41), an air inlet one-way valve (42) and an adjustable capacity suction pipe (43), and the power module comprises a high-precision adjustable stabilized power supply (4);
The touch screen (1) is connected with the MCU controller (2), the MCU controller (2) is electrically connected to the high-precision adjustable stabilized voltage supply (4), the MCU controller (2) is electrically connected with the stepping motor control device (15), the stepping motor control device (15) is connected with the pumping piston (40) through the spiral metal rod (39), the pumping piston (40) is hermetically contained in the adjustable capacity pumping pipe (43), one end of the adjustable capacity pumping pipe (43) is connected to the movable sealing of the pumping piston (40), the other end of the adjustable capacity pumping pipe is provided with sealing surfaces of two air holes, the lower end air hole is designed to be in sealing connection with the left end of the flue gas catcher (12) through a plastic pipe, the upper end air hole is designed to be in direct contact with air, pumping time is set on the touch screen (1), the MCU controller (2) is fed back, the MCU controller (2) sends pulse signals to control the stepping motor control device (15) to adjust the rotating speed and the torque value, the stepping motor control device (15) is connected with the spiral metal rod (39) to adjust the pumping piston (40) in the adjustable capacity pumping pipe (43), the pumping capacity is controlled by the adjustable capacity of the pumping pipe (43), and the pumping flow rate reaches the adjustable pumping time of the pumping pipe (43; the detection device (10) is electrically connected to the MCU controller (2), and the MCU controller (2) controls the detection device (10) to be powered off and cooled according to the received difference value between the feedback temperature and the preset voltage, and the temperature is controlled to be a preset temperature value by pressurizing and heating; the signal amplifier (3) is electrically connected to the MCU controller (2), the slide sheet of the high-precision sliding rheostat (5) is electrically connected to the positive electrode of the high-precision adjustable stabilized voltage power supply (4), the negative electrode of the high-precision adjustable stabilized voltage power supply (4) is connected with the detection device (10) through a lead (24), two equivalent resistors of a resistor I (44) and a resistor II (45) are fixed in the resistor box (9), and the components in the resistor I (44), the resistor II (45), the high-precision sliding rheostat (5) and the detection device (10) form a bridge circuit; an air outlet channel (33) of the detection device (10) is connected with the right end of a smoke catcher (12) through a hollow heat-insulating pipe (7), a precision electronic balance (13) is arranged below the smoke catcher (12), an air inlet channel (20) in the detection device (10) is connected with a smoke placing clamp (6) through the hollow heat-insulating pipe (7), a platinum thermal resistance temperature sensor I (8) connected with an MCU (micro control unit) controller (2) is hermetically arranged in the hollow heat-insulating pipe (7), smoke generated by tobacco products arranged on the smoke placing clamp (6) enters the detection device (10) through the hollow heat-insulating pipe (7), and the platinum thermal resistance temperature sensor I (8) is used for feeding back initial smoke temperature to the MCU controller (2);
The detection device (10) comprises a stainless steel heat preservation box (16), a metal body (19), an air inlet channel (20), a metal elastic sheet I (21), a non-inductive stainless steel metal heating rod (22), a horizontal air channel (23), a wire (24), a compression bolt I (25), a gold-plated miniature spiral heat-sensitive element I (26), a vertical parallel tube I (27), an orifice I (28), a gas distribution channel I (29), a compression bolt II (30), a gold-plated miniature spiral heat-sensitive element II (31), a vertical parallel tube II (32), an air outlet channel (33), a locking pin (34) and a platinum thermal resistance temperature sensor II (35), an orifice II (36) and a gas distribution channel II (37);
the detection device (10) adopts a stainless steel cylinder structure, two vertical parallel pipes I (27) and two vertical parallel pipes II (32) with screw threads at the upper ends are arranged on the detection device, a gold-plated miniature spiral heat-sensitive element I (26) and a gold-plated miniature spiral heat-sensitive element II (31) are respectively sealed in the vertical parallel pipes I (27) and the vertical parallel pipes II (32) by a compression bolt I (25) and a compression bolt II (30), the horizontal air passage (23) is communicated with the bottoms of the vertical parallel pipes I (27) and the vertical parallel pipes II (32), two ends of the horizontal air passage (23) are respectively communicated with a small transverse hole, and are respectively led out from side holes at the left end and the right end of a stainless steel heat-preserving box (16) to form an air inlet passage (20) and an air outlet passage (33), the air inlet passage (20) and the air outlet passage (33) of the horizontal air passage (23) are respectively elastically adhered by a metal I (21) and a metal elastic piece II (38), and the left sides of the vertical parallel pipes I (27) and the vertical parallel pipes II (32) are respectively connected with an air passage (29) and a vertical parallel pipe II (37) respectively, and the vertical parallel pipes (23) are just communicated with the vertical air passage (32); the upper surface of the bottom of the stainless steel heat preservation box (16) is locked with a metal heating block, namely a metal body (19), the metal body (19) at the lower end of the horizontal air passage (23) is averagely provided with two non-inductive stainless steel metal heating rods (22), the center of the metal body (19) is provided with a platinum thermal resistance temperature sensor II (35) electrically connected with the MCU controller (2), the platinum thermal resistance temperature sensor II (35) is used for feeding back a temperature signal of the horizontal air passage (23) to the MCU controller (2), the negative electrode of the high-precision adjustable stabilized voltage power supply (4) is connected with a gold-plated micro spiral heat-sensitive element I (26) in the detection device (10) through a lead wire (24), a resistor I (44), a resistor II (45), the micro spiral heat-sensitive element I (26) in the detection device (10), the gold-plated micro spiral heat-sensitive element II (31) in the detection device (10) and a high-precision slide rheostat (5) form a bridge circuit, an air outlet passage (33) in the detection device (10) is connected with a right air passage (12) through a hollow pipe (7), the vertical air passage (27) and the parallel air passage (19) and the air passage (32) are processed on the horizontal air passage (32), the smoke generated by the tobacco products arranged on the smoke placing clamp (6) enters a horizontal air passage (23), a vertical parallel pipe I (27) and a vertical parallel pipe II (32) in the detection device (10), and the leads of the two gold-plated miniature spiral thermosensitive elements are led out from the vertical parallel pipes on the stainless steel heat preservation box (16); an orifice I (28) is designed at the connecting part of the air dividing channel I (29) and the vertical parallel pipe, and an orifice II (36) is designed at the connecting part of the air dividing channel II (37) and the vertical parallel pipe; the components are arranged in a stainless steel heat preservation box (16), a heat preservation silicon cotton plate (17) is arranged around the inside of the stainless steel heat preservation box (16), and the internal space surrounded by the silicon cotton plate (17) is filled with micro glass beads (18) to form a bath constant temperature mode;
The lead (24) led out by the gold-plated miniature spiral thermosensitive element I (26) is connected with the resistor I (44) in series, and the serial node is A; the other end of the resistor I (44) is connected to the maximum resistance end of the high-precision slide rheostat (5), and the connection point is B; the other maximum resistance end of the high-precision slide rheostat (5) is connected in series with a lead (24) led out by a gold-plated miniature spiral thermosensitive element II (31), and the series connection node is C; the other end of the lead-out wire (24) of the gold-plated miniature spiral thermosensitive element II (31) is connected in series to a resistor II (45), and the serial node is D; the other end of the resistor II (45) is connected with a gold-plated miniature spiral thermosensitive element I (26), and the node is E; the signal acquisition end of the signal amplifier (3) is respectively and electrically connected to the node A and the node D;
the stepping motor control device (15) comprises a stepping motor (46) and a stepping motor controller (47) which is matched with the stepping motor (46), a command is input on the touch screen (1) to enable the stepping motor controller (47) to directly control the stepping motor (46) to adjust the rotating speed and the torque value, and the spiral metal rod (39) is linked to adjust the position of the suction piston (40) in the suction pipe (43) with adjustable capacity so as to control the suction time and the suction flow of the suction pipe (43) with adjustable capacity.
2. A device for measuring the specific heat capacity of tobacco smoke according to claim 1, wherein: the volumes of the vertical parallel pipes I (27) and II (32) are smaller than 100 mu l, the vertical parallel pipes I and II are cylindrical, and the preset temperature is maintained at 100 ℃ and higher than the flue gas temperature in the initial state of work.
3. A device for measuring the specific heat capacity of tobacco smoke according to claim 1, wherein: the gold-plated miniature spiral thermosensitive element I (26) and the gold-plated miniature spiral thermosensitive element II (31) are tungsten wires or platinum wires or Lei wires or platinum-tungsten alloy wires.
4. A device for measuring the specific heat capacity of tobacco smoke according to claim 1, wherein: the metal spring plate I (21) and the metal spring plate II (38) are made of magnesium aluminum alloy.
5. A measuring method of a tobacco product smoke specific heat capacity measuring device is characterized by comprising the following steps of: the tobacco product smoke specific heat capacity measuring device according to claim 1, comprising the following steps:
a. will beThe detection device (10) is installed, and the tobacco products are placed in the tobacco placing clamp (6); starting a high-precision adjustable stabilized voltage supply (4), designing a bridge circuit formed by a gold-plated miniature spiral heat-sensitive element I (26), a gold-plated miniature spiral heat-sensitive element II (31), a resistor I (44), a resistor II (45) and a high-precision sliding rheostat (5) in a circuit, and continuously heating the gold-plated miniature spiral heat-sensitive element I (26) and the gold-plated miniature spiral heat-sensitive element II (31) by the high-precision adjustable stabilized voltage supply (4), and adjusting a sliding sheet of the high-precision sliding rheostat (5) after the temperature is stable to enable voltage U at two ends of a A, D contact point AD =0v; wherein, the lead (24) led out by the gold-plated miniature spiral thermosensitive element I (26) is connected in series with the resistor I (44), and the serial node is A; the other end of the lead (24) led out by the gold-plated miniature spiral thermosensitive element II (31) is connected in series to a resistor II (45), and the serial node is D; after the suction device (14) is started, the flue gas passes through the hollow heat preservation pipe (7), the temperature of the flue gas is detected through the platinum thermal resistance temperature sensor I (8), the temperature of the flue gas is stored in the MCU controller (2), and the flue gas flows into the detection device (10) for further detection due to suction;
b. setting the temperature of a horizontal air passage (23) on a touch screen (1), and correspondingly heating and cooling a non-inductive stainless steel metal heating rod (22) under the control of an MCU (micro control unit) controller (2), wherein when the temperature fed back by a platinum thermal resistance temperature sensor II (35) is higher than a preset temperature, the power is turned off and the temperature is lowered, and when the temperature is lower than the preset temperature, the power is turned on and the temperature is raised, so that the temperature of the horizontal air passage (23) is kept at the set temperature;
c. after the platinum thermal resistance temperature sensor II (35) detects that the temperature of the horizontal air passage (23) is stable, feeding back the temperature to the MCU controller (2), according to the suction condition set by the touch screen (1), the stepping motor control device (15) is connected with the suction piston (40) through a spiral metal rod (39), the suction piston (40) is hermetically contained in the suction pipe (43) with adjustable capacity, the suction time is set on the display screen, the temperature is fed back to the MCU controller (2), a pulse signal is sent to control the stepping motor controller (47) which is matched with the stepping motor (46) to adjust the rotating speed and the torque value, and the spiral metal rod (39) is linked to adjust the position of the suction piston (40) in the suction pipe (43) with adjustable capacity, so as to adjust the suction time and the suction force;
d. At the start of suctionAfter the device (14), the flue gas passes through the hollow heat preservation pipe (7), the temperature of the flue gas is detected by the platinum thermal resistance temperature sensor I (8), and the flue gas is stored in the MCU controller (2), the flue gas is opened due to the air pressure difference, the metal spring plate I (21) and the metal spring plate II (38), and the flue gas generated by the tobacco product enters the horizontal air passage (23) through the air inlet passage (20) and flows into the vertical parallel pipe I (27) and the vertical parallel pipe II (32); the flue gas conducts heat, so that heat of the gold-plated miniature spiral heat-sensitive element I (26) and the gold-plated miniature spiral heat-sensitive element II (31) is dissipated, resistance of the gold-plated miniature spiral heat-sensitive element I (26) and the gold-plated miniature spiral heat-sensitive element II (31) is reduced, voltage at two ends of a A, D joint is unbalanced, and the flue gas heat conductivity coefficient is related to voltage at two ends of a A, D joint:wherein lambda is m Is the smoke heat conductivity coefficient, l is the effective length of the gold-plated micro spiral heat-sensitive element I (26) and the gold-plated micro spiral heat-sensitive element II (31), r C Radius r of vertical parallel tube I (27) and vertical parallel tube II (32) n Is the radius R of the gold-plated micro spiral heat-sensitive element I (26) or the gold-plated micro spiral heat-sensitive element II (31) S The resistance value of the resistor I (44) or the resistor II (45) is alpha is the temperature change coefficient of the gold-plated micro spiral thermosensitive element I (26) and the gold-plated micro spiral thermosensitive element II (31), I is half of the display current value of the high-precision adjustable stabilized voltage supply (4), and R 0 The resistance values of the gold-plated micro spiral heat-sensitive element I (26) and the gold-plated micro spiral heat-sensitive element II (31) are no current, U is the voltage displayed by the high-precision adjustable stabilized voltage supply (4) AD For the signal amplifier (3) to detect the voltage signal of the A, D junction, t c Is the temperature of the vertical parallel tube I (27) and the vertical parallel tube II (32) when stable;
e. after the heat conductivity coefficient of the smoke is measured, the tobacco product is taken down from the smoke placing clamp (6), the MCU controller (2) controls the stepping motor control device (15) to control the suction device (14) to perform air suction again, so that the smoke in the detection device (10) flows into the smoke capturing device from the detection device (10) due to the air pressure difference, namely, the smoke is collected onto the Cambridge filter disc (11) in the smoke catcher (12), and the smoke quality is measured through the high-precision electronic scale;
f. according to the energy Q absorbed by the flue gas under the condition of heat exchange 0 =cmΔt, calculateWherein C is the specific heat capacity of flue gas, t 0 For the initial flue gas temperature, t c For the temperatures of the vertical parallel tube I (27) and the vertical parallel tube II (32) at steady state, deltaT is the initial flue gas temperature T 0 Difference, t, from the temperature tc of the vertical parallel tube I (27) and the vertical parallel tube II (32) at steady state n The balance temperature of the thermosensitive element under the action of current, m is the measured smoke mass, R S The resistance value of the resistor I (44) or the resistor II (45) is alpha is the temperature change coefficient of the gold-plated micro spiral thermosensitive element I (26) and the gold-plated micro spiral thermosensitive element II (31), I is half of the display current value of the high-precision adjustable stabilized voltage supply (4), and R 0 The resistance values of the gold-plated micro spiral heat-sensitive element I (26) and the gold-plated micro spiral heat-sensitive element II (31) are no current, U is the voltage displayed by the high-precision adjustable stabilized voltage supply (4) AD A voltage signal of the A, D junction is detected for the signal amplifier (3). />
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2193727A1 (en) * | 2008-12-05 | 2010-06-09 | Philip Morris Products S.A. | Smoking machine |
| CN103674761A (en) * | 2013-12-13 | 2014-03-26 | 上海烟草集团有限责任公司 | Automatic cigarette smoke analysis device |
| CN107167557A (en) * | 2017-04-25 | 2017-09-15 | 广东中烟工业有限责任公司 | One kind visualization flue gas suction experimental provision and its application process |
| CN107421986A (en) * | 2017-06-20 | 2017-12-01 | 昆明理工大学 | A kind of smog measuring device and method |
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2018
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2193727A1 (en) * | 2008-12-05 | 2010-06-09 | Philip Morris Products S.A. | Smoking machine |
| CN103674761A (en) * | 2013-12-13 | 2014-03-26 | 上海烟草集团有限责任公司 | Automatic cigarette smoke analysis device |
| CN107167557A (en) * | 2017-04-25 | 2017-09-15 | 广东中烟工业有限责任公司 | One kind visualization flue gas suction experimental provision and its application process |
| CN107421986A (en) * | 2017-06-20 | 2017-12-01 | 昆明理工大学 | A kind of smog measuring device and method |
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