CN111351985B - Resistance detection system and method - Google Patents
Resistance detection system and method Download PDFInfo
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- CN111351985B CN111351985B CN201811583949.3A CN201811583949A CN111351985B CN 111351985 B CN111351985 B CN 111351985B CN 201811583949 A CN201811583949 A CN 201811583949A CN 111351985 B CN111351985 B CN 111351985B
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- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
- A24F47/00—Smokers' requisites not otherwise provided for
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
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Abstract
The application relates to the technical field of heating and non-combustion, in particular to a resistance detection system and method of a heater. The resistance detection system comprises a temperature detection unit, a power supply, a resistance measurement unit and a control unit, wherein the resistance value of the heater is continuously increased or continuously decreased along with the increase of the temperature, and the resistance value of the heater is also increased or decreased to a target value when the heater reaches a preset temperature under the condition of supplying power to the heater. The optimized control unit is simultaneously connected with the plurality of temperature detection units and the resistance measurement unit, so that batch detection of the heaters is realized.
Description
Technical Field
The invention relates to a resistance detection system and a resistance detection method for a heater.
Background
The low-temperature heating cigarette is also called as heating non-combustion cigarette, is common in cigarette form, but is different from the traditional cigarette which generates smoke by combustion, and the low-temperature heating cigarette which is designed by taking heating non-combustion as the idea can ensure that the tobacco leaves are heated to the degree of giving off the taste without igniting the tobacco leaves, so that the harmful substances in the first-hand cigarette and the second-hand cigarette are greatly reduced. PCT/EP2010/006598 discloses a smoking system, the heater comprising a plurality of electrically conductive tracks on an electrically insulating substrate, the electrically insulating substrate being rigid and arranged to be inserted into the aerosol-forming substrate, the electrically conductive tracks having temperature coefficient of resistance characteristics which enable the plurality of electrically conductive tracks to function as both a resistive heater and a temperature sensor. In the actual production process, the consistency of the heaters is not high enough, so that the temperature coefficient of resistance characteristics of each heater have differences, which brings difficulty to the temperature control in the use process of the heaters.
Disclosure of Invention
Accordingly, it is necessary to provide a resistance detection system and a resistance detection method for a heater to solve the temperature control problem of the heater.
The embodiment of the invention provides a resistance detection system, which comprises:
a temperature detection unit including at least one non-contact temperature sensor for detecting a temperature of the heater;
a power supply for supplying power to the heater;
a resistance measuring unit electrically connected to the heater to measure a resistance value thereof;
and the control unit is respectively in signal connection with the temperature detection unit and the resistance measurement unit, the heater is heated up under the power supply of the power supply, and when the temperature detection unit detects that the heater reaches a preset temperature, the resistance value of the heater at the temperature is recorded.
In another embodiment of the invention, the resistance measuring unit is integrated in a control board electrically connected to the heater.
In another embodiment of the present invention, the control board includes a memory cell therein, and the control unit writes a resistance value of the heater reaching a preset temperature into the memory cell.
In another embodiment of the present invention, the control unit comprises a first control subunit and a second control subunit, the first control subunit and the second control subunit are communicatively connected, the first control subunit is integrated in the control board, and the second control subunit is communicatively connected with the temperature detection unit; the temperature detection unit detects that the heater reaches a preset temperature, the second control subunit sends a signal to the first control subunit, and the first control subunit records the resistance value of the heater at the temperature.
In another embodiment of the invention, the power supply is electrically connected to the control board, and the control board, the heater and the power supply constitute at least a part of a finished or semi-finished product of the electric heating appliance.
In another embodiment of the present invention, the temperature detection unit comprises at least two temperature sensors for measuring the temperature of the same position or area of the heater.
In another embodiment of the present invention, at least two temperature sensors for measuring the temperature of different positions or areas of the heater are included in the temperature detection unit.
In another embodiment of the present invention, the temperature detection unit includes at least two temperature sensors, and the preset temperature is at least one of an average temperature, a maximum temperature, and a minimum temperature detected by each temperature sensor.
In another embodiment of the present invention, the temperature detection unit comprises at least two temperature sensors, and if the difference between the temperatures detected by the two temperature sensors is less than a threshold value, the resistance value of the heater at the temperature is recorded; otherwise, the detection error is indicated, and the detection is carried out again.
In another embodiment of the invention, the temperature sensor is an infrared temperature sensor, and the temperature variation range of the heater is located in the range of the measuring range of the infrared temperature sensor.
In another embodiment of the present invention, the heater is disposed at an optimal measurement position of the infrared temperature sensor.
In another embodiment of the present invention, a fixing unit for fixing the heater is further included.
In another embodiment of the present invention, the heating device further comprises a position adjusting unit connected to the fixing unit and/or the temperature detecting unit for adjusting the relative position of the heater and the temperature sensor.
In another embodiment of the present invention, the preset temperatures include at least a first preset temperature and a second preset temperature, and the control unit records a first resistance value and a second resistance value of the heater corresponding to the temperatures, respectively.
In another embodiment of the present invention, the temperature detection unit detects the temperature of the heater in real time, the resistance measurement unit detects the resistance value of the heater in real time, and the control unit records the relationship between the resistance and the temperature of the heater.
In another embodiment of the present invention, the number of the temperature detection units and the number of the resistance measurement units in the resistance detection system are both greater than two.
In another embodiment of the invention, the heater is an insertion heater for insertion into an aerosol-generating article to heat an aerosol-generating substance therein to generate an aerosol.
In another embodiment of the invention, the heater is a cartridge heater for receiving and heating an aerosol-generating article.
The invention also provides a resistance detection method, which comprises the following steps:
s1, fixing the distance between the heater and the temperature detection unit so that the heater is located in the detection range of at least one temperature sensor arranged in the temperature detection unit;
s2, supplying electric energy to the heater to raise the temperature of the heater, and detecting the temperature and the resistance value of the heater;
and S3, when the heater reaches the preset temperature, recording the resistance value of the heater at the temperature.
Compared with the method using the same resistance temperature coefficient characteristic, the method measures the resistance value when the heater reaches the preset temperature, and uses the target resistance value for subsequent heating control. If the finished product or semi-finished product electric heating appliance is directly used for detecting, the measuring process and the target value writing process are synchronous, the operation is simple and quick, and the large-batch industrial production is easy to realize.
Drawings
FIG. 1 is a schematic diagram of a resistance detection system according to the present invention;
fig. 2 is a schematic diagram of the operation of the resistance detection system in embodiment 1 of the present invention;
fig. 3 is a schematic diagram of the operation of the resistance detection system in embodiment 2 of the present invention;
fig. 4 is a schematic diagram of the operation of the resistance detection system in embodiment 3 of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. In contrast, when an element is referred to as being "directly on" another element, there are no intervening elements present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only. The various objects of the drawings are drawn to scale for ease of illustration and not to scale for actual components.
The term "aerosol-generating substance" as used in the embodiments of the present invention refers to a smoking substance, which is a substance that can generate an odor and/or nicotine and/or smoke upon heating or combustion, i.e. a substance that can be atomized, i.e. a smoking material. The tobacco material can be solid, semi-solid and liquid. Solid tobacco materials are often processed into sheet-like products due to considerations such as breathability, assembly, and manufacture, and are also commonly referred to as sheet, and filamentary sheet is also referred to as sheet filament. The tobacco material discussed in the embodiments of the present invention may be natural or synthetic tobacco liquid, tobacco oil, tobacco gum, tobacco paste, tobacco shred, tobacco leaf, etc., for example, the synthetic tobacco material contains glycerin, propylene glycol, nicotine, etc. The tobacco liquid is liquid, the tobacco tar is oily, the tobacco gel is gelatinous, the tobacco paste is pasty, the tobacco shreds comprise natural or artificial or extracted tobacco shreds, and the tobacco leaves comprise natural or artificial or extracted tobacco leaves. The smoking material may be heated in the form of an enclosure with other materials, such as in a heat-degradable package, for example a microcapsule, from which the desired volatile material is derived after heating.
The tobacco material of the embodiment of the invention may or may not contain nicotine. The tobacco material containing nicotine may include at least one of natural tobacco leaf product, tobacco liquid, tobacco oil, tobacco glue, tobacco paste, tobacco shred, tobacco leaf, etc. prepared from nicotine. The tobacco liquid is in water state, the tobacco tar is in oil state, the tobacco gum is in gel state, the tobacco paste is in paste state, the tobacco shred comprises natural or artificial or extracted tobacco shred, and the tobacco leaf comprises natural or artificial or extracted tobacco leaf. The nicotine-free tobacco material mainly contains fragrant substances, such as spices, and can be atomized to simulate smoking process and quit smoking. In one embodiment, the flavoring comprises peppermint oil. The smoking material may also include other additives such as glycerin and/or propylene glycol.
An "aerosol-generating article" according to embodiments of the present invention refers to a product, such as a cigarette, cartridge or rod, preferably a disposable article, containing a smoking material, capable of generating an aerosol, such as smoke or a mist, upon heating. The aerosol-generating article is not capable of providing electrical energy by itself.
The plug-in heater is configured to be inserted into the low-temperature heating smoke for heating, is the most common heater form in the technical field of heating non-combustible smoke, and has certain strength and small volume. The cartridge heater is configured to receive low-temperature heating fumes and externally heat them.
In the prior art, the temperature control of the heater is usually realized based on the resistance temperature coefficient, and the relationship between the resistance and the temperature of the conductor is preferably basically linear. However, the conductive traces are usually distributed in fine lines on the smaller heater volume, and local differences have large influence on the resistance characteristics, so that the initial resistance value and the resistance temperature coefficient are difficult to be well consistent due to the influence of various factors such as the used materials and the process of the actually prepared heater, and if the fixed resistance temperature coefficient characteristic is directly used for temperature control, the inaccuracy of heating temperature control is inevitably caused, and the taste is directly influenced.
Fig. 1 shows the structure of the resistance detection system according to the embodiment of the present invention, which mainly includes a temperature detection unit 100, a power supply 200, a resistance measurement unit 300, and a control unit 400, for detecting the resistance of a heater 500 (not shown in the drawings, see fig. 4), where the heater 500 is preferably an insertion-type heater, and the structure and function of the heater 500 are respectively described. Since the resistance value of the heater 500 continuously increases or continuously decreases with the increase of the temperature, when the heater 500 reaches a preset temperature under the condition of supplying power to the heater 500, the resistance value thereof also increases or decreases to a target value, the temperature detecting unit 100 detects the temperature value, and the resistance measuring unit 300 detects the resistance value, the resistance detecting system of the present invention acquires and records the target value under the condition of simultaneously detecting the heater temperature and the resistance for the subsequent heating control.
The temperature detection unit 100 is a core component for detecting an actual heating temperature of the heater 500, and includes at least one temperature sensor 110, and when the heater 500 is fixed and the at least one temperature sensor 110 is aligned with the heater 500, the resistance detection system can start to operate. For example, when the heater 500 is continuously heated while being powered, the temperature sensor 110 can detect the actual heating temperature; since the heater 500 is inserted into the low-temperature heating smoke for heating even in actual use, the detection result of the temperature detection unit 100 having such a structure is close to the temperature condition of the heater 500 in the actual use situation.
A power supply 200, as can be seen in connection with fig. 1, for supplying electrical energy to said heater 500; the power supply modes of current, voltage, pulse frequency and the like can be different from the actual electric heating appliance, and the actual power supply mode of the electric heating appliance can be simulated to achieve the effect of being closer to the real condition; the power source 200 may be in various forms, for example, the resistance value of the heater 500 of the finished product or the semi-finished product is directly detected, the heater 500 may be directly powered by the power source 200 of the finished product or the semi-finished product, and if the object is detected, the heater 500 is directly connected to the external power source 200.
As can be seen from fig. 1, the resistance measuring unit 300 is electrically connected to the heater 500, measures the voltage and current values of the heater 500, and converts the measured voltage and current values into the resistance values, and the measured resistance values are more accurate as the voltage and current values are closer to the actual values. Since the resistance value of the heater 500 continuously increases or continuously decreases as the temperature increases, the resistance value of the heater 500 increases or decreases to a target value when the heater 500 reaches a preset temperature while the heater 500 is supplied with power.
As can be seen from fig. 1, the control unit 400 is respectively connected to the temperature detecting unit 100 and the resistance measuring unit 300 through signals, the heater 500 is heated up by the power supplied by the power supply 200, the temperature detected by the temperature sensor 110 is also raised due to the heater 500 being placed on the temperature detecting unit 100, if the temperature detection lag or detection error of the temperature sensor 110 is not considered, the temperature detected by the temperature sensor 110 is the actual temperature of the surface of the heater 500, if the temperature detection lag or detection error of the temperature sensor 110 is considered, the temperature detection lag or detection error can be corrected or compensated through a software algorithm, when the temperature detecting unit 100 detects that the heater 500 reaches a preset temperature, the resistance value detected by the resistance measuring unit 300 at this time is retrieved, and the resistance value of the heater 500 at this temperature is recorded. The resistance value can be used as a target value for subsequent heating control, for example, when the optimal heating temperature for heating non-combustible smoke is 300 ℃, the resistance value of the heater 500 continuously increases with the increase of the temperature, and the resistance value of the heater 500 when the heater 500 is heated to 300 ℃ is R, in the actual use and control process, when the resistance value of the heater 500 is measured to increase to R, the optimal heating temperature is reached, the power is reduced or the power supply is stopped; when the resistance value of the heater 500 is measured to be lower than R, it is indicated that the optimum heating temperature has not been reached, and the power supply is continued.
In another embodiment of the resistance detection system of the present invention, at least two temperature sensors 110 for measuring the temperature of the same location or area of the heater 500 are included in the temperature detection unit 100. The position or area refers to a detection range of the temperature detection unit 100 on the surface of the object to be measured, and only in the detection range, the infrared signal is absorbed by the temperature detection unit 100 and converted into an electric signal. For example, the same position is located on the same plane perpendicular to the longitudinal extension direction of the heater 500, the same area is located in the height range of the longitudinal extension direction of the heater 500, the temperature of the heater 500 at the same position or area should be substantially equal, and a plurality of temperature sensors 110 arranged in this way can be used for mutual calibration. Similarly, at least two temperature sensors 110 for measuring the temperature of different positions or areas of the heater 500 are included in the temperature detection unit 100. The heaters 500 may be arranged in a line along the longitudinal extension direction thereof, or may be arranged in a spiral shape. The temperatures of different positions or areas of the heater 500 should have certain differences, and a plurality of temperature sensors 110 arranged in this way can reflect the temperature distribution on the heater 500 more accurately, and can be used for controlling the heating temperature more accurately, so that better mouth feel and smoking taste are realized.
In another embodiment of the resistance sensing system of the present invention, the shape of the cavity 110 is adapted to the heater 500. Referring to fig. 2, the heater 500 has a bar shape with a long bar shape or a needle shape, and the size of the cavity 110 is slightly larger than that of the heater 500, so that the heater 500 can be inserted without an excessive gap. Of course, the heater 500 has other shapes, such as a sheet shape, etc., and the shape of the cavity 110 should be adapted thereto.
In another embodiment of the resistance detection system of the present invention, the preset temperatures at least include a first preset temperature and a second preset temperature, for example, an optimal heating temperature for heating non-combustible smoke is 300 ℃ to 330 ℃, the resistance value of the heater 500 continuously increases with the temperature increase, the first preset temperature may be 300 ℃, the second preset temperature may be 330 ℃, and the control unit 400 records the first resistance value and the second resistance value of the heater 500 corresponding to the temperatures, respectively. When the heater 500 is heated to 300 ℃, the first resistance value is R1, when the heater 500 is heated to 330 ℃, the second resistance value is R2, obviously R1 is less than R2, and in the actual use and control process, when the resistance value of the heater 500 is measured to be increased to R1, the optimal heating temperature interval is reached, power supply is continued or power supply is reduced, so that the temperature is continuously increased; measuring the resistance value of the heater 500 rising to R2, indicating that the upper temperature limit has been reached, and reducing the power or stopping the power supply, so that the temperature decreases; when the resistance value of the heater 500 is measured to decrease to R1, indicating that the optimum lower temperature limit has been reached, power supply is started or power supply is increased. Of course, if the resistance value of the heater 500 is continuously decreased with the temperature increase, R1 > R2, and the optimal heating temperature is maintained similarly, the resistance of the heater 500 is still between R1 and R2, and power needs to be decreased or stopped when the resistance is decreased to R2 in specific control, and power needs to be started or increased when the resistance is increased to R1.
Preferably, if more target values are required in a heating control process for heating non-combustible smoke to achieve more precise temperature control, more preset temperatures T1, T2, T3 and T4 … …, and resistance values R1, R2, R3 and R4 … … corresponding to the preset temperatures may be set, and a set of discrete temperature resistance relationships constituting the heater 500 may be set, and any one or both of them may be arbitrarily selected to implement temperature control in the manner of the foregoing embodiment.
Preferably, the temperature detection unit 100 detects the temperature of the heater 500 in real time, the resistance measurement unit 300 detects the resistance value of the heater 500 in real time, so as to form a linear temperature resistance relationship of the heater 500, the control unit 400 records the relationship between the resistance and the temperature of the heater 500, and the heating temperature of the heater 500 can be determined according to the resistance value of the heater 500 at any time, thereby realizing more flexible and diversified control.
In another embodiment of the resistance detection system of the present invention, at least two temperature sensors 110 are disposed in the cavity 110 of the temperature detection unit 100, and the temperature values detected by these different temperature sensors 110 are used in combination or selectively, so as to obtain a more accurate temperature value of the heater 500. For example, if two or more temperature sensors 110 detect the temperature of the same position or area of the heater 500 at the same time, and if the temperature sensors 110 are all well aligned, the detected temperatures should be substantially equal without much deviation, but the situation is not ideal every time during the detection process, so that the error caused by the situation can be reduced to a controllable range by using the average temperature.
For another example, each type of non-combustible heating cigarette has a suitable heating temperature, and if the heating temperature is too high, the heated tobacco products can be subjected to excessive thermal cracking, so that not only can more harmful substances be released, but also the smoking taste is affected. Conversely, if the heating temperature is too low, it may not be sufficient to release enough of the ingested components, such as flavor components and saline, to affect the smoking experience. Therefore, the maximum temperature and the minimum temperature of the heater 500 can be detected as important references for subsequent control. Of course, the average, maximum and minimum temperatures may be used in combination, for example, the highest and lowest temperatures are removed from all the detected temperatures and the remaining temperatures are averaged. The temperature detected by each temperature sensor 110 can be used in a suitable combination according to the actual type and temperature distribution characteristics of the heater 500. The manner of using the above-mentioned detected temperatures is merely exemplary, and not all examples of the specific use process are included, and the ranges described in the present specification should be considered as long as there is no contradiction between the individual use or the combined use of the detected temperatures.
Preferably, at least two temperature sensors 110 are disposed in the chamber 110, and if two of the temperature sensors 110 detect temperature values at different positions of the heater 500, there is a substantially fixed temperature difference therebetween, and if two of the temperature sensors 110 detect temperature values at the same position of the heater 500, the detected temperatures should be substantially equal. When the positions of two of the temperature sensors 110 are fixed, the temperature difference of the heater 500 detected by the two temperature sensors is also substantially fixed, so that a threshold value can be determined according to actual conditions, and if the temperature difference detected by the two temperature sensors 110 is smaller than the threshold value, which indicates that the detection is correct, the resistance value of the heater 500 at the temperature is recorded; otherwise, the detection error is indicated, and the detection is carried out again.
In another embodiment of the resistance detection system of the present invention, the resistance detection system includes more than two temperature detection units 100 and more than two resistance measurement units 300, which may share the same control unit 400, or may be connected to one control unit 400, so as to form a situation that multiple sets of detection subsystems are parallel, and this arrangement may implement simultaneous connection of multiple heaters 500, thereby implementing batch detection of multiple heaters 500.
In another embodiment of the resistance detection system of the present invention, the temperature sensor 110 is an infrared temperature sensor, and its sensing element is not in contact with the measured object heater 500, and is a non-contact temperature sensor, also called an infrared thermometer. Such temperature sensors can be used to measure the surface temperature of moving objects, small targets and objects with small heat capacities or fast temperature changes (transients), and also to measure the temperature distribution of the temperature field. In this embodiment, the temperature variation range of the heater is within the range of the measurement range of the infrared temperature sensor, i.e., the measurement range, and the measurement can be performed only when the infrared temperature sensor is selected and the measurement range is noticed. In addition, the type and size of the sensor is noted to achieve accurate measurement of temperature, e.g., the distance coefficient D of an infrared temperature sensor: s is an important parameter of the infrared probe, namely the ratio of the distance D between the probe of the thermodetector and the target to the diameter S of the target to be measured. Under the condition that the size of the measured target is determined, a suitable distance range from the probe to the target can be determined; meanwhile, the size of the sensor cannot be selected to be too large or too small, particularly for a thermometer with a fixed focal length, the position of the focal point of the optical system is the minimum position of the light spot, the light spot is increased at positions close to and far from the focal point, the size of the sensor needs to be selected according to the size of the heater 500, and the situation that the measured light spot is larger than the size of the sensor is avoided. When selecting an infrared temperature sensor, optical resolution, wavelength range, response time, signal processing function, etc. are determined, for example, the material of the object to be measured determines the wavelength range for measurement, and in addition, the influence of factors such as temperature, atmosphere, pollution and interference on performance indexes needs to be considered particularly to determine a correction method to increase the measurement accuracy. Preferably, when using a resistance detection system, the heater 500 is disposed at an optimal measurement position of the infrared temperature sensor 110, for example, using an infrared temperature sensor with an optical auxiliary positioning unit, and the optimal measurement position is most preferably the minimum spot position thereof, so that in order to accurately measure the temperature at a distance close to and far from the focal point, the measured target size should be larger than the spot size at the focal point, thereby achieving the most accurate measurement of the surface temperature of the heater 500.
In another embodiment of the resistance detection system of the present invention, the temperature detection unit 100 detects the temperature of the cylindrical heater, for example, directly measuring the temperature of the outer wall of the cylindrical heater, or aligning the temperature detection unit 100 with the inner wall of the cylindrical heater, so as to detect the temperature in the accommodating cavity. And simultaneously measuring the voltage and the current value connected into the cylindrical heater, and converting to obtain the resistance value, wherein the closer the voltage and the current value are to the actual value, the more accurate the measured resistance value is. The specific resistance measurement process and the operation process of the control unit 400 are the same as those of the previous embodiment, and are not described herein again.
In another embodiment of the resistance detection system of the present invention, a fixing unit 510 is further included for fixing the heater 500, so that the distance d between the heater and the temperature detection unit 100 cannot be randomly deviated, thereby ensuring the accuracy and stability of the measurement. Preferably, the resistance detection system further includes a position adjustment unit (not shown) connected to the fixing unit 510 and/or the temperature detection unit 100 for adjusting the relative position of the heater 500 and the temperature sensor 110, and particularly adjusting the distance d between the heater 500 and the temperature sensor 110 to the focal length of the temperature sensor 110, so that the heater 500 is located at the optimal measurement position of the temperature sensor 110. The invention also provides a resistance detection method which reflects the working process of the resistance detection system and comprises the following steps:
s1, fixing the distance between the heater and the temperature detection unit so that the heater is located in the detection range of at least one temperature sensor arranged in the temperature detection unit;
s2, supplying electric energy to the heater to raise the temperature of the heater, and detecting the temperature and the resistance value of the heater;
and S3, when the heater reaches the preset temperature, recording the resistance value of the heater at the temperature.
Example 1
Referring to fig. 1 and 2, in the resistance detection method of the present embodiment, the detection object is an independent heater 500 not connected to a control board, the resistance detection system includes a temperature detection unit 100, a power supply 200, a resistance measurement unit 300, and a control unit 400, and the detailed process is as follows:
1) the heater 500 is fixed, for example, the distance d between the heater 500 and the temperature detection unit 100 is limited to a proper range by using the fixing unit 510, preferably, the heater 500 is located at the position of the minimum light spot of the infrared temperature sensor 110, the leads of the heater 500 are connected with the positive electrode and the negative electrode of the input port of the power supply 200, the resistance measurement unit 300 retrieves the power supply data of the power supply 200 to the heater 500, and therefore, the detection of the heater 500 by the resistance measurement unit 300 also forms a complete loop.
2) The start switch supplies power to the heater 500 to raise the temperature thereof, and the temperature detection unit 100 and the resistance measurement unit 300 are simultaneously activated to detect the temperature and the resistance value of the heater 500.
3) When the temperature detecting unit 100 detects that the temperature of the heater 500 reaches the preset temperature, it sends a signal to the control unit 400, and the control unit 400 immediately retrieves and records the resistance value measured by the resistance measuring unit 300. Preferably, the resistance detection system further comprises a flash memory, and the detected resistance value is directly written into the flash memory.
4) When the cigarette is assembled subsequently, the resistance value is written into a control board of the cigarette for temperature control parameters of the cigarette in the subsequent use process. In the subsequent use process, as long as the resistance value of the heater 500 reaches the temperature control parameter, which indicates that the heater 500 has reached the required target temperature, the power supply mode can be adjusted, for example, the power is adjusted or the power supply is stopped or stopped.
Example 2
Referring to fig. 1 and 3, in the resistance detection method of the present embodiment, a detection object is a semi-finished electrical heating appliance, the semi-finished electrical heating appliance is a heater 500 connected with a control board 600, the resistance detection system includes a temperature detection unit 100, a resistance measurement unit 300, a control unit 400, and a power supply 200, and the resistance measurement unit 300 is integrated in the control board 600 electrically connected with the heater 500.
The detailed process is as follows:
1) the semi-finished electric heating appliance is fixed, for example, the distance d between the heater 500 and the temperature detection unit 100 is defined to a suitable range using the fixing unit 510, and it is preferable that the heater 500 is located at the minimum spot of the infrared temperature sensor 110. The lead wires of the control board 600 are connected to the positive and negative electrodes of the input port of the power supply 200, the control board 600 is connected to the control unit 400 through the serial port 610 such as the USB, and the resistance measuring unit 300 retrieves power supply data to the heater 500, so that the detection of the heater 500 by the resistance measuring unit 300 also forms a complete loop.
2) The switch 620 on the control board 600 is activated to supply power to the heater 500 to heat it, and the temperature detection unit 100 and the resistance measurement unit 300 are simultaneously activated to detect the temperature and the resistance value of the heater 500.
3) When the temperature detecting unit 100 detects that the temperature of the heater 500 reaches the preset temperature, it sends a signal to the control unit 400, and the control unit 400 immediately retrieves and records the resistance value measured by the resistance measuring unit 300. Preferably, the control board 600 includes a memory unit (not shown), and the control unit 400 writes a resistance value of the heater 500 at a predetermined temperature into the memory unit.
4) When the smoking set is installed subsequently, the battery is connected with the upper control panel 600, the shell is added, and the stored resistance value can be directly used as a temperature control parameter of the smoking set in the subsequent use process. In the subsequent use process, as long as the resistance value of the heater 500 reaches the temperature control parameter, which indicates that the heater 500 has reached the required target temperature, the power supply mode can be adjusted, for example, the power is adjusted or the power supply is stopped or stopped.
Example 3
Referring to fig. 1 and 4, in the resistance detection method of the present embodiment, the detection object is a finished electric heating appliance including a heater 500, a control board 600, a battery 200, a case 700, and the like. The resistance detection system comprises a temperature detection unit 100, a resistance measurement unit 300, a control unit 400 and a power supply 200, wherein the resistance measurement unit 300 is integrated in a control panel 600 electrically connected with the heater 500, the power supply 200 directly uses a battery 200 of a finished product electric heating appliance, the control unit 400 comprises a first control subunit and a second control subunit, the first control subunit is in communication connection with the second control subunit, the first control subunit is integrated in the control panel 600, and the second control subunit is in communication connection with the temperature detection unit 100.
The detailed process is as follows:
1) the heater 500 is fixed, for example, the distance d between the heater 500 and the temperature detection unit 100 is defined to a suitable range using the fixing unit 510, and it is preferable that the heater 500 is located at the minimum spot of the infrared temperature sensor 110, and further, there is no shielding between the heater 500 and the infrared temperature sensor 110. The lead wires of the control board 600 of the finished electric heating appliance are already connected with the positive and negative electrodes of the input port of the power supply 200, the control board 600 is connected with the control unit 400 through the serial port 610 such as the USB, and the resistance measuring unit 300 retrieves the power supply data of the heater 500, so that the detection of the heater 500 by the resistance measuring unit 300 also forms a complete loop.
2) The switch 620 on the control board 600 is activated to supply power to the heater 500 to heat it, and the temperature detection unit 100 and the resistance measurement unit 300 are simultaneously activated to detect the temperature and the resistance value of the heater 500.
3) When the temperature detecting unit 100 detects that the heater 500 reaches a preset temperature, the second control subunit sends a signal to the first control subunit, and the first control subunit records the resistance value of the heater 500 at the temperature. Preferably, the control board 600 includes a memory cell therein, and the control unit 400 writes a resistance value of the heater 500 reaching a preset temperature into the memory cell.
4) The stored resistance value can be directly used as a temperature control parameter of the smoking set in the subsequent use process. In the subsequent use process, as long as the resistance value of the heater 500 reaches the temperature control parameter, which indicates that the heater 500 has reached the required target temperature, the power supply mode can be adjusted, for example, the power is adjusted or the power supply is stopped or stopped.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (17)
1. A resistance sensing system, comprising:
the temperature detection unit is externally arranged on a finished product electric heating appliance or a heater comprising the heater and is used for detecting the temperature of the heater;
a power supply for supplying power to the heater;
a resistance measuring unit electrically connected to the heater to measure a resistance value thereof;
the control unit is respectively in signal connection with the temperature detection unit and the resistance measurement unit, the heater is heated under the power supply of the power supply, when the temperature detection unit detects that the heater reaches a preset temperature, the resistance value of the heater at the preset temperature is recorded, and the resistance value is used as a target value for subsequent heating control;
the temperature detection unit comprises at least two non-contact temperature sensors for measuring the temperature of the same position or area of the heater, or the temperature detection unit comprises at least two non-contact temperature sensors for measuring the temperature of different positions or areas of the heater.
2. The resistance sensing system of claim 1, wherein the resistance measurement unit is integrated within a control board electrically connected to the heater.
3. The resistance detection system according to claim 2, wherein the control board includes a memory cell therein, and the control unit writes a resistance value at which the heater reaches a preset temperature into the memory cell.
4. The resistance sensing system of claim 3, wherein the control unit comprises a first control subunit and a second control subunit, the first control subunit and the second control subunit being communicatively connected, the first control subunit being integrated within the control board, the second control subunit being communicatively connected to the temperature detection unit; the temperature detection unit detects that the heater reaches a preset temperature, the second control subunit sends a signal to the first control subunit, and the first control subunit records the resistance value of the heater at the temperature.
5. The electrical resistance sensing system of claim 4, wherein said power source is electrically connected to said control board, said heater and said power source forming at least a portion of a finished or semi-finished product of an electrical heating appliance.
6. The electrical resistance sensing system of claim 1, wherein the predetermined temperature is at least one of an average temperature, a maximum temperature, and a minimum temperature sensed by each temperature sensor.
7. The resistance sensing system of claim 1, wherein if the difference between the temperatures sensed by the two temperature sensors is less than a threshold value, the resistance of the heater at that temperature is recorded; otherwise, the detection error is indicated, and the detection is carried out again.
8. The resistance sensing system of claim 1, wherein the temperature sensor is an infrared temperature sensor, and the temperature range of the heater is within the range of the span of the infrared temperature sensor.
9. The resistance sensing system of claim 8, wherein the heater is positioned at an optimal measurement location of the infrared temperature sensor.
10. The resistance sensing system according to claim 1, further comprising a fixing unit for fixing the heater.
11. The electrical resistance sensing system according to claim 10, further comprising a position adjusting unit connected to the fixing unit and/or the temperature sensing unit for adjusting a relative position of the heater and the temperature sensor.
12. The resistance sensing system according to claim 1, wherein the preset temperatures include at least a first preset temperature and a second preset temperature, and the control unit records a first resistance value and a second resistance value of the heater corresponding to the temperatures, respectively.
13. The resistance sensing system according to claim 1, wherein the temperature sensing unit senses the temperature of the heater in real time, the resistance measuring unit senses the resistance value of the heater in real time, and the control unit records the relationship between the resistance and the temperature of the heater.
14. The electrical resistance sensing system of claim 1, wherein the number of temperature sensing units and resistance measuring units in the electrical resistance sensing system is greater than two.
15. A resistance sensing system according to claim 1, wherein the heater is a plug-in heater for insertion into an aerosol-generating article to heat an aerosol-generating substance therein to generate an aerosol.
16. The electrical resistance detection system of claim 1, wherein the heater is a cartridge heater for receiving and heating an aerosol-generating article.
17. A resistance detection method is characterized by comprising the following steps:
s1, fixing the finished electric heating appliance or heater comprising the heater, and the distance between the finished electric heating appliance or heater and the temperature detection unit, so that the heater is positioned in the detection range of a temperature sensor arranged in the temperature detection unit; the temperature detection unit comprises at least two non-contact temperature sensors for measuring the temperature of the same position or area of the heater, or the temperature detection unit comprises at least two non-contact temperature sensors for measuring the temperature of different positions or areas of the heater; the temperature detection unit is arranged outside the finished product electric heating appliance or the heater comprising the heater;
s2, supplying electric energy to the heater to raise the temperature of the heater, and detecting the temperature and the resistance value of the heater;
s3, when the heater reaches a preset temperature, recording the resistance value of the heater at the temperature; the resistance value is used as a target value for subsequent heating control.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111506631.7A CN114355042A (en) | 2018-12-24 | 2018-12-24 | Resistance detection system and method |
| CN201811583949.3A CN111351985B (en) | 2018-12-24 | 2018-12-24 | Resistance detection system and method |
| PCT/CN2019/122476 WO2020134888A1 (en) | 2018-12-24 | 2019-12-02 | Resistance measurement system and method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811583949.3A CN111351985B (en) | 2018-12-24 | 2018-12-24 | Resistance detection system and method |
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| CN202111506631.7A Division CN114355042A (en) | 2018-12-24 | 2018-12-24 | Resistance detection system and method |
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| CN111351985A CN111351985A (en) | 2020-06-30 |
| CN111351985B true CN111351985B (en) | 2022-02-11 |
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| CN111838756A (en) * | 2019-04-30 | 2020-10-30 | 上海新型烟草制品研究院有限公司 | Aerosol generating device, temperature adjusting method, system, equipment and storage medium thereof |
| CN112056637A (en) * | 2020-09-27 | 2020-12-11 | 云南中烟工业有限责任公司 | Testing device for resistance temperature coefficient of heating body of electronic cigarette and using method thereof |
| CN113455706A (en) * | 2021-08-23 | 2021-10-01 | 湖南中烟工业有限责任公司 | Smoking set heater calibration system and calibration method thereof |
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Also Published As
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| WO2020134888A1 (en) | 2020-07-02 |
| CN114355042A (en) | 2022-04-15 |
| CN111351985A (en) | 2020-06-30 |
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