CN110044508B - Electromagnetic heating system and temperature measuring method and device thereof - Google Patents
Electromagnetic heating system and temperature measuring method and device thereof Download PDFInfo
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- CN110044508B CN110044508B CN201810036162.9A CN201810036162A CN110044508B CN 110044508 B CN110044508 B CN 110044508B CN 201810036162 A CN201810036162 A CN 201810036162A CN 110044508 B CN110044508 B CN 110044508B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
- G01K7/16—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements
- G01K7/22—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements the element being a non-linear resistance, e.g. thermistor
Abstract
The invention discloses an electromagnetic heating system and a temperature measuring method and a temperature measuring device thereof, wherein the electromagnetic heating system comprises a plurality of temperature measuring circuits, each temperature measuring circuit comprises a temperature measuring element, each temperature measuring circuit carries out temperature detection according to the corresponding temperature measuring element to obtain temperature detection voltage, and the temperature measuring method comprises the following steps: based on the temperature detection voltage obtained by each temperature measurement circuit, obtaining a plurality of relation curves between the temperature measurement precision and the temperature by obtaining the relation curve between the temperature measurement precision and the temperature of each temperature measurement circuit; fitting a plurality of relation curves between temperature measurement accuracy and temperature to obtain a system temperature measurement accuracy curve; and acquiring a temperature measuring reference point on the system temperature measuring precision curve, and carrying out temperature detection on the target to be detected according to the acquired temperature measuring reference point and the system temperature measuring precision curve. According to the temperature measuring method, the temperature measuring range of the electromagnetic heating system can be expanded, and the temperature measuring precision of the electromagnetic heating system can be improved.
Description
Technical Field
The invention relates to the technical field of electromagnetic heating, in particular to a temperature measuring method of an electromagnetic heating system, a non-transitory computer readable storage medium, computer equipment and a temperature measuring device of the electromagnetic heating system.
Background
A thermistor is a temperature-sensitive electronic component, and its resistance value shows a monotone increasing or decreasing trend with the change of temperature, and it is usually used to make a temperature sensor.
In the related art, a thermistor is generally connected in series with a fixed resistor, and the voltage across the fixed resistor or the thermistor is sampled. And calculating the current resistance value of the thermistor according to the principle of resistance voltage division. And calculating a temperature value corresponding to the current resistance value of the thermistor by using a relation curve of the resistance value and the temperature of the thermistor, so as to obtain the current temperature of the thermistor. Therefore, an approximate relation curve of the resistance value of the thermistor and the temperature and a relation of a voltage sampling value on the fixed resistor or the thermistor and the temperature can be obtained. The approximate relationship between the resistance of the thermistor and the temperature, and the relationship between the voltage sampling value on the fixed resistor or thermistor and the temperature are generally nonlinear.
According to the relation between the voltage sampling value on the fixed resistor or the thermistor and the temperature, the relation between the variation of the voltage sampling value in unit temperature and the temperature can be obtained, and the relation between temperature measurement precision and the temperature can be obtained. When the resistance value of the thermistor is reduced along with the rise of the temperature, the temperature measurement precision can be gradually increased and then gradually reduced along with the rise of the temperature. Therefore, the temperature measurement range is narrow, and the temperature measurement precision is low.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the art described above. Therefore, an object of the present invention is to provide a temperature measuring method for an electromagnetic heating system, which can expand the temperature measuring range of the electromagnetic heating system and improve the temperature measuring accuracy of the electromagnetic heating system.
A second object of the invention is to propose a non-transitory computer-readable storage medium.
A third object of the invention is to propose a computer device.
The fourth purpose of the invention is to provide a temperature measuring device of an electromagnetic heating system.
In order to achieve the above object, an embodiment of a first aspect of the present invention provides a temperature measurement method for an electromagnetic heating system, where the electromagnetic heating system includes a plurality of temperature measurement circuits, each of the temperature measurement circuits includes a temperature measurement element, and each of the temperature measurement circuits performs temperature measurement according to a corresponding temperature measurement element to obtain a temperature measurement voltage, and the temperature measurement method includes the following steps: based on the temperature detection voltage obtained by each temperature measurement circuit, obtaining a plurality of relation curves between the temperature measurement precision and the temperature by obtaining the relation curve between the temperature measurement precision and the temperature of each temperature measurement circuit; fitting a plurality of relation curves between temperature measurement accuracy and temperature to obtain a system temperature measurement accuracy curve; and acquiring a temperature measuring reference point on the system temperature measuring precision curve, and detecting the temperature of the target to be detected according to the acquired temperature measuring reference point and the system temperature measuring precision curve.
According to the temperature measuring method of the electromagnetic heating system, based on the temperature detection voltage obtained by each temperature measuring circuit, a plurality of relation curves between the temperature measuring precision and the temperature are obtained by obtaining the relation curve between the temperature measuring precision and the temperature of each temperature measuring circuit, the relation curves between the temperature measuring precision and the temperature are fitted to obtain the system temperature measuring precision curve, the temperature measuring reference point on the system temperature measuring precision curve is obtained, and the temperature of the target to be measured is detected according to the obtained temperature measuring reference point and the system temperature measuring precision curve. Therefore, the temperature measuring range of the electromagnetic heating system can be enlarged, and the temperature measuring precision of the electromagnetic heating system can be improved.
In addition, the temperature measuring method of the electromagnetic heating system according to the above embodiment of the present invention may further have the following additional technical features:
in an embodiment of the present invention, fitting a plurality of curves of relationship between temperature measurement accuracy and temperature to obtain a system temperature measurement accuracy curve includes: acquiring an intersection point between two adjacent relation curve peak points; and selecting or rejecting a plurality of relation curves between the temperature measurement precision and the temperature according to the intersection points between the peak points to obtain the system temperature measurement precision curve.
In one embodiment of the invention, the intersection point between the peak points is a temperature measurement reference point on the temperature measurement precision curve of the system.
In an embodiment of the present invention, when the plurality of temperature measurement accuracy-temperature relationship curves are the first relationship curve and the second relationship curve, the number of intersection points between the peak points is one, and the plurality of temperature measurement accuracy-temperature relationship curves are cut according to the intersection points between the peak points to obtain the system temperature measurement accuracy curve, including: and reserving a first relation curve of the temperature corresponding to the intersection point between the peak points, reserving a second relation curve of the temperature corresponding to the intersection point between the peak points, and taking the two reserved relation curves as the temperature measurement precision curves of the system.
To achieve the above object, a non-transitory computer-readable storage medium is provided in a second embodiment of the present invention, and a computer program is stored thereon, where the computer program, when executed by a processor, implements the startup control method of the electromagnetic heating system provided in the first embodiment of the present invention.
According to the non-transitory computer-readable storage medium provided by the embodiment of the invention, the temperature measurement range of the electromagnetic heating system can be expanded, and the temperature measurement precision of the electromagnetic heating system can be improved.
In order to achieve the above object, a third embodiment of the present invention provides a computer device, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor, and when the processor executes the computer program, the processor implements the startup control method of the electromagnetic heating system provided in the first embodiment of the present invention.
According to the computer equipment provided by the embodiment of the invention, the temperature measurement range of the electromagnetic heating system can be expanded, and the temperature measurement precision of the electromagnetic heating system can be improved.
In order to achieve the above object, a fourth aspect of the present invention provides a temperature measuring device for an electromagnetic heating system, where the electromagnetic heating system includes a plurality of temperature measuring circuits, each of the temperature measuring circuits includes a temperature measuring element, and each of the temperature measuring circuits performs temperature detection according to a corresponding temperature measuring element to obtain a temperature detection voltage, and the temperature measuring device includes: the curve acquisition module is used for acquiring a plurality of relation curves between temperature measurement precision and temperature by acquiring a relation curve between the temperature measurement precision and the temperature of each temperature measurement circuit based on the temperature detection voltage acquired by each temperature measurement circuit; the fitting module is used for fitting a plurality of relation curves between temperature measurement precision and temperature to obtain a system temperature measurement precision curve; and the temperature processing module is used for acquiring a temperature measurement reference point on the system temperature measurement precision curve and detecting the temperature of the target to be detected according to the acquired temperature measurement reference point and the system temperature measurement precision curve.
According to the temperature measuring device of the electromagnetic heating system, based on the temperature detection voltage obtained by each temperature measuring circuit, the curve obtaining module can be used for obtaining the relation curve between the temperature measuring precision and the temperature of each temperature measuring circuit so as to obtain a plurality of relation curves between the temperature measuring precision and the temperature, the fitting module is used for fitting the plurality of relation curves between the temperature measuring precision and the temperature so as to obtain the system temperature measuring precision curve, the temperature processing module is used for obtaining the temperature measuring reference point on the system temperature measuring precision curve, and the temperature detection is carried out on the target to be detected according to the obtained temperature measuring reference point and the system temperature measuring precision curve. Therefore, the temperature measuring range of the electromagnetic heating system can be enlarged, and the temperature measuring precision of the electromagnetic heating system can be improved.
In addition, the temperature measuring device of the electromagnetic heating system proposed by the above embodiment of the present invention may further have the following additional technical features:
in an embodiment of the present invention, when the fitting module fits a plurality of relation curves between temperature measurement accuracy and temperature, the fitting module is further configured to obtain an intersection point between peak points of two adjacent relation curves; and selecting or rejecting a plurality of relation curves between the temperature measurement precision and the temperature according to the intersection points between the peak points to obtain the system temperature measurement precision curve.
In one embodiment of the invention, the intersection point between the peak points is a temperature measurement reference point on the temperature measurement precision curve of the system.
In an embodiment of the present invention, when the plurality of relationship curves between temperature measurement accuracy and temperature are a first relationship curve and a second relationship curve, the intersection point between the peak points is one, wherein the fitting module is specifically configured to retain the first relationship curve of the temperature corresponding to the intersection point between the peak points, which is less than or equal to the temperature corresponding to the intersection point between the peak points, retain the second relationship curve of the temperature corresponding to the intersection point between the peak points, and use the two retained relationship curves as the system temperature measurement accuracy curves.
In order to achieve the above object, a fifth embodiment of the present invention provides an electromagnetic heating system, which includes a temperature measuring device of the electromagnetic heating system according to the fourth embodiment of the present invention.
According to the electromagnetic heating system provided by the embodiment of the invention, the temperature measurement range can be expanded, and the temperature measurement precision can be improved.
Drawings
FIG. 1 is a circuit configuration diagram of two thermometry circuits according to one embodiment of the present invention;
FIG. 2 is a flow chart of a method of thermometry of an electromagnetic heating system according to an embodiment of the present invention;
FIG. 3 is a temperature detection voltage versus temperature curve of a temperature measurement circuit according to an embodiment of the present invention;
FIG. 4 is a graph of temperature versus temperature for a temperature measurement according to one embodiment of the present invention;
FIG. 5 is a graph of two temperature measurement accuracy versus temperature curves according to an embodiment of the present invention;
FIG. 6 is a system temperature measurement accuracy curve obtained by fitting two temperature measurement accuracy-temperature relationship curves according to an embodiment of the present invention;
FIG. 7 is a graph of four temperature measurement accuracies versus temperature, in accordance with one embodiment of the present invention;
FIG. 8 is a diagram illustrating a temperature measurement accuracy curve of the system obtained by fitting four temperature measurement accuracy-temperature relationship curves according to an embodiment of the present invention;
FIG. 9 is a block diagram of a temperature measuring device of an electromagnetic heating system according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
The electromagnetic heating system, the temperature measuring method and the temperature measuring device thereof according to the embodiments of the present invention are described below with reference to the accompanying drawings.
It should be noted that the electromagnetic heating system according to the embodiment of the present invention may include a plurality of temperature measuring circuits, where each of the temperature measuring circuits may include a temperature measuring element, and each of the temperature measuring elements performs temperature detection according to the corresponding temperature measuring element to obtain a temperature detection voltage.
In one embodiment of the invention, the temperature sensing element may include a thermistor and a fixed resistor. As shown in fig. 1, the electromagnetic heating system may include two thermometric circuits, namely a first thermometric circuit 100 and a second thermometric circuit 200. The first temperature measuring circuit 100 may include a first thermistor RT1 and a first fixed resistor R1, one end of the first thermistor RT1 may be connected to one end of the first fixed resistor R1, the other end of the first thermistor RT1 may be grounded, and the other end of the first fixed resistor R1 may be connected to a preset power VCC. The second temperature measuring circuit 200 may include a second thermistor RT2 and a second fixed resistor R2, one end of the second thermistor RT2 may be connected to one end of the second fixed resistor R1, the other end of the second thermistor RT2 may be grounded, and the other end of the second fixed resistor R2 may be connected to a preset power VCC.
The electromagnetic heating system may further include more temperature measuring circuits, wherein each of the temperature measuring circuits may include a thermistor and a fixed resistor, and the connection manner of the temperature measuring circuits is the same as the connection manner of the thermistor and the fixed resistor in the first temperature measuring circuit 100 and the second temperature measuring circuit 200.
The thermistors in the temperature measuring circuits can be distributed on the probe of one sensor or the probes of a plurality of sensors.
In other embodiments of the present invention, the thermistor may be replaced with a photo-resistor, a piezo-resistor, a piezoelectric element, or the like. When the temperature measuring circuit is supplied with alternating current, the fixed resistor can be replaced by a capacitor, an inductor and the like.
Fig. 2 is a flowchart of a temperature measuring method of an electromagnetic heating system according to an embodiment of the present invention.
As shown in fig. 2, the temperature measuring method of the electromagnetic heating system according to the embodiment of the present invention includes the following steps:
and S1, acquiring a plurality of temperature measurement accuracy and temperature relation curves by acquiring the temperature measurement accuracy and temperature relation curve of each temperature measurement circuit based on the temperature detection voltage acquired by each temperature measurement circuit.
Specifically, the temperature detection voltage U0 of the temperature measurement circuit can be obtained by the microcontroller, and the voltage can be obtained by serially dividing the resistance: u0 ═ R VCC/(RT + R), where R is the resistance of the fixed resistor in the temperature measurement circuit, RT is the resistance of the thermistor in the temperature measurement circuit, and VCC is the preset voltage. The relationship between the temperature T and the resistance RT of the thermistor can be obtained according to the performance of the thermistor: RT (f) (T), and therefore, a relationship between the temperature detection voltage U and the temperature T of the temperature measurement circuit, i.e., U0(T) ═ VCC/(f (T)) + R, can be obtained, and a relationship curve between the temperature detection voltage U and the temperature T of the temperature measurement circuit can be shown in fig. 3.
The temperature measurement accuracy d of the temperature measurement circuit can be the variation of the temperature detection voltage U0 obtained by the temperature measurement circuit in a unit temperature, that is, the temperature measurement accuracy d of the temperature measurement circuit can be expressed as: d-U0 '(T) -dU 0/dT-R VCC f' (T)/(f)2(T)+R2+2R × (t)). As shown in fig. 4, the relationship curve between the temperature measurement accuracy d and the temperature T can be obtained according to the above formula, so that a plurality of relationship curves between the temperature measurement accuracy and the temperature T can be obtained.
Wherein, the fixed resistors have different resistance values, and the thermistors have the same specification; or the specifications of the thermistors are different, and the resistance values of the fixed resistors are the same; or the resistance values of the fixed resistors are different, the specifications of the thermistors are also different, the temperature detection voltages of the temperature measurement circuits are different, and therefore the different temperature measurement circuits have different temperature measurement precision and temperature relation curves.
And S2, fitting the relation curves between the temperature measurement precision and the temperature to obtain a system temperature measurement precision curve.
Specifically, an intersection point between peak points of two adjacent relationship curves can be obtained, and a plurality of relationship curves between measurement accuracy and temperature are selected or rejected according to the intersection point between the peak points, so as to obtain a system temperature measurement accuracy curve.
In an embodiment of the present invention, as shown in fig. 5, the plurality of temperature measurement accuracy-temperature relationship curves may be two temperature measurement accuracy-temperature relationship curves, i.e., a first relationship curve d1 and a second relationship curve d2, and the intersection point between the peak points may be one, wherein the plurality of temperature measurement accuracy-temperature relationship curves may be cut according to the intersection point between the peak points to obtain the system temperature measurement accuracy curve.
Specifically, as shown in fig. 6, a first relation d1 of the temperature Td corresponding to the intersection point between the peak points or less may be retained, a second relation d2 of the temperature Td corresponding to the intersection point between the peak points or more may be retained, and the two retained relations may be used as the system temperature measurement accuracy curves. Wherein, the broken line represents the relationship curve with lower discarded precision, and the solid line represents the temperature measurement precision curve of the system.
That is, when the temperature T is less than or equal to the temperature Td corresponding to the intersection point between the peak points and the temperature measurement accuracy corresponding to the first relationship curve is greater than the temperature measurement accuracy corresponding to the second relationship curve, the first relationship curve in the temperature interval can be retained as the system temperature measurement accuracy curve in the temperature interval; when the temperature T is greater than the temperature Td corresponding to the intersection point between the peak points and the temperature measurement accuracy corresponding to the second relationship curve is greater than the temperature measurement accuracy corresponding to the first relationship curve, the second relationship curve in the temperature interval can be retained as the system temperature measurement accuracy curve in the temperature interval. Therefore, the relation curve with higher temperature measurement precision can be always used as the temperature measurement precision curve of the system, and the temperature measurement precision of the system is improved.
In other embodiments of the present invention, as shown in fig. 7, the plurality of relation curves between temperature measurement accuracy and temperature may also be four relation curves between temperature measurement accuracy and temperature, and the intersection point between the peak points of every two adjacent relation curves may be one. As shown in fig. 8, by the method of the above embodiment, the temperature interval divided by the intersection point between the peak points can be always kept as the system temperature measurement accuracy curve, and thus, the temperature measurement accuracy of the system can be further improved.
Further, more temperature measuring circuits can be used for measuring the temperature of the target to be measured, correspondingly, more relation curves between the temperature measuring precision and the temperature can be obtained, and by the method in the embodiment, the temperature measuring precision of the system can be further improved, and the temperature measuring range of the system can be improved.
It should be noted that, the number of intersection points between two adjacent temperature measurement accuracy-temperature relationship curves may be multiple, that is, two or more. At this time, the temperature range may be divided into a plurality of temperature sections by the temperature corresponding to each intersection, and the magnitude of the temperature measurement accuracy corresponding to the relationship curve between the temperature measurement accuracy and the temperature in each temperature section may be compared. And (4) reserving the relation curve with higher measurement precision in each temperature interval to be used as a system temperature measurement precision curve.
And S3, acquiring a temperature measurement reference point on the system temperature measurement precision curve, and detecting the temperature of the target to be detected according to the acquired temperature measurement reference point and the system temperature measurement precision curve.
And the intersection point between the peak points is a temperature measurement reference point on the system temperature measurement precision curve.
Specifically, according to the temperature measurement accuracy curve of the system obtained in the above embodiment, correspondingly, the relationship curve between the reserved temperature detection voltage and the temperature can be obtained. And obtaining the current temperature of the target to be detected according to the reserved relation curve of the temperature detection voltage and the temperature and the obtained current temperature detection voltage. Therefore, the temperature of the target to be measured can be accurately detected.
According to the temperature measuring method of the electromagnetic heating system, based on the temperature detection voltage obtained by each temperature measuring circuit, a plurality of relation curves between the temperature measuring precision and the temperature are obtained by obtaining the relation curve between the temperature measuring precision and the temperature of each temperature measuring circuit, the relation curves between the temperature measuring precision and the temperature are fitted to obtain the system temperature measuring precision curve, the temperature measuring reference point on the system temperature measuring precision curve is obtained, and the temperature of the target to be measured is detected according to the obtained temperature measuring reference point and the system temperature measuring precision curve. Therefore, the temperature measuring range of the electromagnetic heating system can be enlarged, and the temperature measuring precision of the electromagnetic heating system can be improved.
In correspondence with the above embodiments, the present invention also provides a non-transitory computer-readable storage medium, on which a computer program is stored, which, when executed by a processor, can implement the temperature measurement method of the electromagnetic heating system proposed by the above embodiments of the present invention.
According to the non-transitory computer-readable storage medium of the embodiment of the present invention, by executing the stored computer program, the temperature measurement range of the electromagnetic heating system can be expanded, and the temperature measurement accuracy of the electromagnetic heating system can be improved.
Corresponding to the above embodiments, the present invention further provides a computer device, which may include a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program stored in the memory, the temperature measurement method of the electromagnetic heating system according to the above embodiments of the present invention may be implemented.
According to the computer equipment provided by the embodiment of the invention, the temperature measurement range of the electromagnetic heating system can be expanded, and the temperature measurement precision of the electromagnetic heating system can be improved.
The invention further provides a temperature measuring device of the electromagnetic heating system, which corresponds to the embodiment.
As shown in fig. 9, the thermometric apparatus of the electromagnetic heating system according to the embodiment of the present invention may include a curve obtaining module 10, a fitting module 20, and a temperature processing module 30.
The curve obtaining module 10 may be configured to obtain a plurality of relationship curves between temperature measurement accuracy and temperature by obtaining a relationship curve between temperature measurement accuracy and temperature of each temperature measurement circuit based on the temperature detection voltage obtained by each temperature measurement circuit; the fitting module 20 may be configured to fit a plurality of temperature measurement accuracy-temperature relationship curves to obtain a system temperature measurement accuracy curve; the temperature processing module 30 may be configured to obtain a temperature measurement reference point on the system temperature measurement precision curve, and perform temperature detection on the target to be detected according to the obtained temperature measurement reference point and the system temperature measurement precision curve.
Specifically, the temperature detection voltage U0 of the temperature measurement circuit can be obtained by the microcontroller, and the voltage can be obtained by serially dividing the resistance: u0 ═ R VCC/(RT + R), where R is the resistance of the fixed resistor in the temperature measurement circuit, RT is the resistance of the thermistor in the temperature measurement circuit, and VCC is the preset voltage. The relationship between the temperature T and the resistance RT of the thermistor can be obtained according to the performance of the thermistor: RT (f) (T), and therefore, a relationship between the temperature detection voltage U and the temperature T of the temperature measurement circuit, i.e., U0(T) ═ VCC/(f (T)) + R, can be obtained, and a relationship curve between the temperature detection voltage U and the temperature T of the temperature measurement circuit can be shown in fig. 3.
The temperature measurement accuracy d of the temperature measurement circuit can be the variation of the temperature detection voltage U0 obtained by the temperature measurement circuit in a unit temperature, that is, the temperature measurement accuracy d of the temperature measurement circuit can be expressed as: d-U0 '(T) -dU 0/dT-R VCC f' (T)/(f)2(T)+R2+2R × (t)). As shown in fig. 4, the curve obtaining module 10 can obtain a relation curve between the temperature measurement accuracy d and the temperature T, so that a plurality of relation curves between the temperature measurement accuracy and the temperature can be obtained.
Wherein, the fixed resistors have different resistance values, and the thermistors have the same specification; or the specifications of the thermistors are different, and the resistance values of the fixed resistors are the same; or the resistance values of the fixed resistors are different, the specifications of the thermistors are also different, the temperature detection voltages of the temperature measurement circuits are different, and therefore the different temperature measurement circuits have different temperature measurement precision and temperature relation curves.
Specifically, the fitting module 20 may obtain an intersection point between peak points of two adjacent relationship curves, and accept or reject a plurality of relationship curves between measurement accuracy and temperature according to the intersection point between the peak points, so as to obtain a temperature measurement accuracy curve of the system.
In an embodiment of the present invention, as shown in fig. 5, the plurality of temperature measurement accuracy-temperature relationship curves may be two temperature measurement accuracy-temperature relationship curves, that is, a first relationship curve d1 and a second relationship curve d2, and the intersection point between the peak points may be one, wherein the fitting module 20 may cut the plurality of temperature measurement accuracy-temperature relationship curves according to the intersection point between the peak points to obtain the system temperature measurement accuracy curve.
Specifically, as shown in fig. 6, the fitting module 20 may retain a first relation d1 that is less than or equal to the temperature Td corresponding to the intersection point between the peak points, retain a second relation d2 that is greater than the temperature Td corresponding to the intersection point between the peak points, and use the two retained relations as the system temperature measurement accuracy curves.
That is, when the temperature T is less than or equal to the temperature Td corresponding to the intersection point between the peak points, and the temperature measurement accuracy corresponding to the first relationship curve is greater than the temperature measurement accuracy corresponding to the second relationship curve, the fitting module 20 may reserve the first relationship curve in the temperature interval as the system temperature measurement accuracy curve in the temperature interval; when the temperature T is greater than the temperature Td corresponding to the intersection point between the peak points, and the temperature measurement accuracy corresponding to the second relationship curve is greater than the temperature measurement accuracy corresponding to the first relationship curve, the fitting module 20 may reserve the second relationship curve in the temperature interval as the system temperature measurement accuracy curve in the temperature interval. Therefore, the fitting module 20 can always use the relation curve with higher temperature measurement precision as the temperature measurement precision curve of the system, thereby improving the temperature measurement precision of the system.
In other embodiments of the present invention, as shown in fig. 7, the plurality of relation curves between temperature measurement accuracy and temperature may also be four relation curves between temperature measurement accuracy and temperature, and the intersection point between the peak points of every two adjacent relation curves may be one. As shown in fig. 8, by the method of the above embodiment, the fitting module 20 may always keep the relationship curve with higher temperature measurement accuracy corresponding to each temperature interval as the temperature measurement accuracy curve of the system according to the temperature interval divided by the intersection point between the peak points, thereby improving the temperature measurement accuracy of the system and the temperature measurement range of the system.
Further, more temperature measuring circuits can be used for measuring the temperature of the target to be measured, correspondingly, more relation curves between the temperature measuring precision and the temperature can be obtained, and by the method in the embodiment, the temperature measuring precision of the system can be further improved, and the temperature measuring range of the system can be improved.
It should be noted that, the number of intersection points between two adjacent relationship curves between temperature measurement accuracy and temperature may be multiple, that is, two or more, at this time, the temperature range may be divided into multiple temperature intervals by the temperature corresponding to each intersection point, and the magnitude of the temperature measurement accuracy corresponding to the relationship curve between temperature measurement accuracy and temperature in each temperature interval may be compared, and the relationship curve with higher measurement accuracy in each temperature interval is retained, so as to serve as the system temperature measurement accuracy curve.
And the intersection point between the peak points is a temperature measurement reference point on the system temperature measurement precision curve.
Specifically, according to the temperature measurement accuracy curve of the system obtained in the above embodiment, correspondingly, the relationship curve between the reserved temperature detection voltage and the temperature can be obtained. According to the retained relationship curve between the temperature detection voltage and the temperature and the obtained current temperature detection voltage, the temperature processing module 30 may obtain the current temperature of the target to be detected. Therefore, the temperature of the target to be measured can be accurately detected.
According to the temperature measuring device of the electromagnetic heating system, based on the temperature detection voltage obtained by each temperature measuring circuit, the curve obtaining module can be used for obtaining the relation curve between the temperature measuring precision and the temperature of each temperature measuring circuit so as to obtain a plurality of relation curves between the temperature measuring precision and the temperature, the fitting module is used for fitting the plurality of relation curves between the temperature measuring precision and the temperature so as to obtain the system temperature measuring precision curve, the temperature processing module is used for obtaining the temperature measuring reference point on the system temperature measuring precision curve, and the temperature detection is carried out on the target to be detected according to the obtained temperature measuring reference point and the system temperature measuring precision curve. Therefore, the temperature measuring range of the electromagnetic heating system can be enlarged, and the temperature measuring precision of the electromagnetic heating system can be improved.
The invention further provides an electromagnetic heating system corresponding to the embodiment.
The electromagnetic heating system according to the embodiment of the present invention includes the temperature measuring device of the electromagnetic heating system according to the above embodiment of the present invention, and specific implementation manners thereof may refer to the above embodiment, and are not described herein again.
According to the electromagnetic heating system provided by the embodiment of the invention, the temperature measurement range of the electromagnetic heating system can be expanded, and the temperature measurement precision of the electromagnetic heating system can be improved.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (7)
1. A temperature measuring method of an electromagnetic heating system is characterized in that the electromagnetic heating system comprises a plurality of temperature measuring circuits, each temperature measuring circuit comprises a temperature measuring element, each temperature measuring circuit carries out temperature detection according to the corresponding temperature measuring element to obtain temperature detection voltage, and the temperature measuring method comprises the following steps:
based on the temperature detection voltage obtained by each temperature measurement circuit, obtaining a plurality of relation curves between the temperature measurement precision and the temperature by obtaining the relation curve between the temperature measurement precision and the temperature of each temperature measurement circuit;
acquiring an intersection point between two adjacent relation curve peak points; selecting or rejecting a plurality of relation curves between temperature measurement precision and temperature according to the intersection points between the peak points to obtain a system temperature measurement precision curve;
acquiring a temperature measuring reference point on the system temperature measuring precision curve, detecting the temperature of the target to be detected according to the acquired temperature measuring reference point and the system temperature measuring precision curve, acquiring a relation curve of temperature detection voltage and temperature according to the system temperature measuring precision curve,
the temperature measurement precision d of the temperature measurement circuit is expressed as: d-U0 '(T) -dU 0/dT-R VCC f' (T)/(f)2(T)+R2+2R f (T)), obtaining a relation curve between the temperature measurement precision d and the temperature T according to the formula, wherein R is the resistance value of the fixed resistor in the temperature measurement circuit, VCC is the preset voltage, and f (T) is the resistance value of the thermistor in the temperature measurement circuit;
the temperature measurement reference point is an intersection point between peak points of two adjacent relation curves.
2. The method for measuring temperature of an electromagnetic heating system according to claim 1, wherein when there are a plurality of temperature measurement accuracy/temperature relationship curves, an intersection point between peak points of each adjacent two relationship curves is one and is the reference point for measuring temperature, and wherein the plurality of temperature measurement accuracy/temperature relationship curves are cut off according to the intersection point between the peak points to obtain the system temperature measurement accuracy curve, comprising:
and giving up the relation curve with lower temperature measurement precision, reserving the relation curve with higher temperature measurement precision, and taking the reserved relation curve as the temperature measurement precision curve of the system at the left side and the right side of the temperature measurement reference point.
3. A non-transitory computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, implements a thermometry method of an electromagnetic heating system according to any one of claims 1-2.
4. A computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing a method of thermometry of an electromagnetic heating system according to any of claims 1-2 when the program is executed by the processor.
5. A temperature measuring device of an electromagnetic heating system, wherein the electromagnetic heating system comprises a plurality of temperature measuring circuits, each of the temperature measuring circuits comprises a temperature measuring element, each of the temperature measuring circuits performs temperature detection according to the corresponding temperature measuring element to obtain a temperature detection voltage, and the temperature measuring device comprises:
the curve acquisition module is used for acquiring a plurality of relation curves between temperature measurement precision and temperature by acquiring a relation curve between the temperature measurement precision and the temperature of each temperature measurement circuit based on the temperature detection voltage acquired by each temperature measurement circuit;
the fitting module is used for acquiring an intersection point between peak points of two adjacent relation curves; selecting or rejecting a plurality of relation curves between temperature measurement precision and temperature according to the intersection points between the peak points to obtain a system temperature measurement precision curve;
the temperature processing module is used for acquiring a temperature measuring reference point on the system temperature measuring precision curve, detecting the temperature of the target to be detected according to the acquired temperature measuring reference point and the system temperature measuring precision curve, acquiring a relation curve of temperature detection voltage and temperature according to the system temperature measuring precision curve,
the temperature measurement precision d of the temperature measurement circuit is expressed as: d-U0 '(T) -dU 0/dT-R VCC f' (T)/(f)2(T)+R2+2R f (T)), obtaining a relation curve between the temperature measurement precision d and the temperature T according to the formula, wherein R is the resistance value of the fixed resistor in the temperature measurement circuit, VCC is the preset voltage, and f (T) is the resistance value of the thermistor in the temperature measurement circuit;
the temperature measurement reference point is an intersection point between peak points of two adjacent relation curves.
6. The temperature measuring apparatus of an electromagnetic heating system according to claim 5, wherein when there are a plurality of temperature measurement accuracy-temperature relationship curves, an intersection point between peak points of each two adjacent relationship curves is one and is the reference point for temperature measurement, wherein the fitting module is specifically configured to,
and giving up the relation curve with lower temperature measurement precision, reserving the relation curve with higher temperature measurement precision, and taking the reserved relation curve as the temperature measurement precision curve of the system at the left side and the right side of the temperature measurement reference point.
7. An electromagnetic heating system, characterized by comprising a temperature measuring device of an electromagnetic heating system according to any one of claims 5 to 6.
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