CN110410994A - Temperature feedback method, apparatus, temperature control system and readable storage medium storing program for executing - Google Patents
Temperature feedback method, apparatus, temperature control system and readable storage medium storing program for executing Download PDFInfo
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- CN110410994A CN110410994A CN201910585820.4A CN201910585820A CN110410994A CN 110410994 A CN110410994 A CN 110410994A CN 201910585820 A CN201910585820 A CN 201910585820A CN 110410994 A CN110410994 A CN 110410994A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/89—Arrangement or mounting of control or safety devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
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Abstract
The invention discloses a kind of temperature feedback method, by obtaining controlled object that temperature sensor detects in the measurement temperature at current time；Obtain the rate temperature change for the controlled object that the temperature sensor detects and the thermal coefficient of the temperature sensor；According to the measurement temperature, the rate temperature change and the thermal coefficient, determines and feed back the controlled object in the final temperature of equilibrium temperature state.The invention also discloses a kind of temperature control system, device and readable storage medium storing program for executing.The present invention improves the temperature-responsive speed of temperature sensor, improves the control speed and accuracy of temperature control system；So that temperature control system uses the temperature sensor of general performance, quick temperature-responsive also may be implemented, reduce the cost of temperature control system, and makes high performance sensor temperature response quicker.
Description
Technical Field
The present invention relates to the field of temperature control technologies, and in particular, to a temperature feedback method, a temperature feedback device, a temperature control system, and a readable storage medium.
Background
In an automatic control device, it is often necessary to detect and control the temperature of a controlled object. For example, the temperature control system of the automatic control device needs accurate and fast feedback of the temperature of the controlled object to accurately and fast regulate and control the temperature of the controlled object, so the response speed of the temperature sensor largely determines the performance of the temperature control system.
At present, the temperature sensor has lag in detecting the temperature of a controlled object and cannot reflect the change of the temperature of the controlled object in time. In some occasions with severe temperature change, the temperature detection lag of a controlled object is a key factor which causes the condition control of a temperature control system to be not fast and accurate enough. Due to the inherent defects of the process and the principle of the temperature sensor, the improvement of the response speed of the detection of the temperature sensor is a technical bottleneck and is difficult to overcome; therefore, the response speed of the detection of the conventional temperature sensor is slow, and the adjusting speed of the temperature control system is influenced. For example, the response speed of a temperature sensor which is suitable for an air conditioner or a water heater in the market at the present is about 5s at 20-80 ℃, and the adjusting speed is influenced. Therefore, the temperature control system has a strong demand for a temperature sensor that can quickly reflect the temperature change of the controlled object.
The above is only for the purpose of assisting understanding of the technical aspects of the present invention, and does not represent an admission that the above is prior art.
Disclosure of Invention
The invention mainly aims to provide a temperature feedback method, and aims to solve the technical problem that in the prior art, the response speed of a temperature sensor to the temperature detection of a controlled object is low, so that the adjustment and control of a temperature control system are not fast and accurate enough.
In order to achieve the above object, the present invention provides a temperature feedback method, including:
acquiring the measured temperature of a controlled object detected by a temperature sensor at the current moment;
acquiring the temperature change rate of a controlled object detected by the temperature sensor and the heat conductivity coefficient of the temperature sensor;
and determining and feeding back the final temperature of the controlled object in a stable temperature state according to the measured temperature, the temperature change rate and the heat conductivity coefficient.
Further, the step of determining and feeding back the final temperature of the controlled object in a stable temperature state according to the measured temperature, the temperature change rate and the thermal conductivity coefficient comprises:
calculating the final temperature of the controlled object in a stable temperature state according to the following first formula:
t＝T+K*T'
wherein T is the final temperature, T is the measured temperature, K is the thermal conductivity, and T' is the temperature change rate.
Further, the step of acquiring the temperature change rate of the controlled object detected by the temperature sensor includes:
acquiring a first temperature of a controlled object at a previous moment and a second temperature of the controlled object at a later moment, which are detected by the temperature sensor;
acquiring the change time length of the controlled object detected by the temperature sensor from the first temperature change to the second temperature;
and determining the temperature change rate according to the first temperature, the second temperature and the change time length.
Further, the step of determining the rate of change of temperature based on the first temperature, the second temperature, and the length of change time includes:
calculating the temperature change rate according to a second formula, wherein the formula is as follows:
T'＝(T1-T2)/t1
wherein T' is the temperature change rate, T1Is the first temperature, T2Is the second temperature, t1Is the change duration.
Further, the step of obtaining the thermal conductivity of the temperature sensor comprises:
acquiring an initial test temperature of the temperature sensor;
acquiring the final test temperature of the temperature sensor, and acquiring the duration of the temperature sensor changing from the initial test temperature to the final test temperature;
and determining the heat conductivity coefficient of the temperature sensor according to the initial test temperature, the final test temperature and the duration.
Further, determining the thermal conductivity of the temperature sensor based on the initial test temperature, the final test temperature, and the duration comprises:
calculating the thermal conductivity according to the following third formula:
wherein K is the thermal conductivity of the temperature sensor, T3Is the initial test temperature, T4For the final test temperature, t2Is the duration.
Further, after the step of determining and feeding back the final temperature of the controlled object in the stable temperature state according to the measured temperature, the temperature change rate and the thermal conductivity, the method further comprises:
and regulating or controlling the temperature of the controlled object according to the final temperature.
In addition, to achieve the above object, the present invention also provides a temperature feedback device, including:
the first acquisition module is used for acquiring the measured temperature of the controlled object detected by the temperature sensor at the current moment;
the second acquisition module is used for acquiring the temperature change rate of the controlled object detected by the temperature sensor and the heat conductivity coefficient of the temperature sensor;
and the feedback module is used for determining and feeding back the final temperature of the controlled object in a stable temperature state according to the measured temperature, the temperature change rate and the heat conductivity coefficient.
Further, to achieve the above object, the present invention also provides a temperature control system comprising: a memory, a processor and a temperature feedback program stored on the memory and executable on the processor, the temperature feedback program when executed by the processor implementing the steps of the temperature feedback method as described above.
In addition, to achieve the above object, the present invention also provides a readable storage medium having stored thereon a temperature feedback program, which when executed by a processor, implements the steps of the temperature feedback method as described above.
According to the temperature feedback method, the temperature feedback device, the temperature control system and the readable storage medium, the measured temperature of the controlled object at the current moment, which is detected by the temperature sensor, the temperature change rate of the controlled object, which is detected by the temperature sensor, and the heat conductivity of the temperature sensor are obtained, the final temperature of the controlled object when the controlled object reaches a stable temperature state is calculated according to the measured temperature, the temperature change rate and the heat conductivity based on the Newton's heat dissipation law, and the final temperature of the controlled object is fed back to the temperature control system. The final temperature of the controlled object in the stable temperature state is calculated before the controlled object reaches the stable temperature state, so that the temperature response speed of the temperature sensor is improved, and the control speed and accuracy of the temperature control system are improved. The temperature control system adopts the temperature sensor with general performance, and can realize quick temperature response, thereby reducing the cost of the temperature control system and enabling the temperature response of the sensor with high performance to be quicker.
Drawings
FIG. 1 is a system diagram of a hardware operating environment of a temperature control system according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart of a first embodiment of a temperature feedback method according to the present invention;
FIG. 3 is a schematic diagram illustrating the time required for feeding back the final temperature in the first embodiment of the temperature feedback method according to the present invention;
FIG. 4 is a block diagram of a temperature feedback device according to a preferred embodiment of the present invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The main solution of the embodiment of the invention is as follows:
acquiring the measured temperature of a controlled object detected by a temperature sensor at the current moment;
acquiring the temperature change rate of a controlled object detected by the temperature sensor and the heat conductivity coefficient of the temperature sensor;
and determining and feeding back the final temperature of the controlled object in a stable temperature state according to the measured temperature, the temperature change rate and the heat conductivity coefficient.
In the prior art, the temperature sensor at present has lag in detecting the temperature of a controlled object and cannot reflect the change of the temperature of the controlled object in time, so that the temperature control system is not fast enough to adjust and control in some occasions with severe temperature changes.
The invention provides a solution, which estimates the final temperature in a stable temperature state in advance according to the measured temperature at the current moment, the temperature change rate at the current moment and the heat conductivity coefficient of the temperature sensor measured by experiments and feeds the final temperature back to the temperature control system, thereby improving the response speed of the temperature sensor and realizing the rapid regulation and control of the temperature by the temperature control system.
As shown in fig. 1, fig. 1 is a schematic system structure diagram of a hardware operating environment of a temperature control system according to an embodiment of the present invention.
The system in the embodiment of the invention can be an air conditioner, and can also be a control system connected with the air conditioner, such as an integrated controller in a home, wherein the integrated controller is connected with each household appliance to control each household appliance. Or the system can also be a water heater or other systems with temperature control functions.
As shown in fig. 1, the system may include: a processor 1001, such as a CPU, a communication bus 1002, a communication module 1003, and a memory 1004. Wherein a communication bus 1002 is used to enable connective communication between these components. The network interface 1003 may optionally be a wireless interface (e.g., WI-FI interface), a bluetooth interface, a ZIGBEE wireless network interface, or the like. The memory 1004 may be a high-speed RAM memory or a non-volatile memory (e.g., a disk memory). The memory 1004 may alternatively be a storage system separate from the processor 1001.
The communication module 1003 in the present invention includes a WIFI module or a bluetooth module that can communicate with a wearable device.
Those skilled in the art will appreciate that the system architecture shown in FIG. 1 is not intended to be limiting of the system, and may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components.
As shown in fig. 1, the memory 1004, which is a type of computer storage medium, may include an operating system and a temperature feedback program therein.
In the system shown in fig. 1, the processor 1001 may be configured to invoke a temperature feedback program stored in the memory 1004 and perform the operations in the various embodiments of the temperature feedback method below.
Based on the above hardware structure, the embodiment of the method of the present invention is provided.
As shown in fig. 2, fig. 2 is a schematic flow chart of a temperature feedback method according to a first embodiment of the present invention.
While a logical order is shown in the flow chart, in some cases, the steps shown or described may be performed in an order different than presented herein.
In the embodiments of the temperature feedback method, the temperature control system is used as an execution subject to explain the embodiments for convenience of description. The embodiment scheme of the invention mainly relates to a temperature control system and a temperature sensor.
Referring to fig. 2, in a first embodiment of the temperature feedback method of the present invention, the temperature feedback method includes:
step S10, acquiring the measured temperature of the controlled object detected by the temperature sensor at the current moment;
the temperature sensor is used for detecting the temperature of a controlled object of the temperature control system and feeding back the temperature of the controlled object and the temperature change condition of the controlled object to the temperature control system, so that the temperature control system can adjust and control the temperature of the controlled object according to the temperature change condition fed back by the temperature sensor. The controlled object refers to an object needing temperature regulation control in a temperature control system, for example, a component needing temperature control in an air energy water heater. The measured temperature is the actual temperature of the controlled object at the current time detected by the temperature sensor.
First, the measured temperature of the controlled object at the present time, which is detected by the temperature sensor, is acquired.
Step S20, acquiring the temperature change rate of the controlled object detected by the temperature sensor and the heat conductivity coefficient of the temperature sensor;
the temperature change rate refers to a temperature change speed of the controlled object. Thermal conductivity, which refers to the thermal conductivity of a temperature sensor; the heat conductivity coefficient of the temperature sensor is related to the setting mode of the temperature sensor, and the heat conductivity coefficient of the temperature sensor is different due to different setting modes of the temperature sensor, for example, the setting mode of the temperature sensor in an air energy water heater is different from the setting mode of the temperature sensor in an air conditioner, and the heat dissipation mode and the heat dissipation influence factors are different, so the heat conductivity coefficient is also different; the thermal conductivity of the temperature sensor can be directly obtained by experimental determination.
Specifically, the temperatures of the controlled object detected by the temperature sensor at two different moments and the time intervals of the two moments are acquired, and then the ratio of the temperature difference of the two different moments to the time intervals of the two moments is used as the temperature change rate of the controlled object. And obtaining the heat conductivity coefficient of the temperature sensor which is obtained by experimental determination in advance.
And step S30, determining and feeding back the final temperature of the controlled object in a stable temperature state according to the measured temperature, the temperature change rate and the heat conductivity coefficient.
According to Newton's heat dissipation law, under the condition that the current temperature and the temperature change speed of the object are known, the final temperature of the object reaching the stable temperature state can be deduced. Knowing the measured temperature of the controlled object at the present moment and the rate of change of the temperature of the controlled object, the final temperature of the controlled object can be deduced back.
The final temperature refers to the final temperature of the controlled object reaching the stable temperature state under the current temperature change condition.
The stable temperature state means that the temperature of the controlled object does not change with time any more, or the temperature of the controlled object changes slightly with time and can be ignored.
Specifically, after the temperature sensor is set, since the temperature sensor detects the temperature of the controlled object and the temperature of the temperature sensor reflects the temperature of the controlled object, the final temperature of the temperature sensor can be estimated before the temperature sensor reaches a stable temperature state, and therefore the final temperature of the temperature sensor, that is, the final temperature of the controlled object, can be calculated by the following first formula:
t＝T+K*T'
where T is the final temperature of the temperature sensor (i.e. the final temperature of the controlled object), T is the measured temperature of the controlled object, K is the thermal conductivity of the temperature sensor, and T' is the rate of change of the temperature of the controlled object.
After the final temperature of the controlled object in the stable temperature state is determined, the final temperature of the controlled object in the stable temperature state is fed back to the temperature control system, so that the temperature control system can adjust and control the temperature of the controlled object according to the final temperature of the controlled object.
Further, after the step of determining the final temperature of the controlled object in the stable temperature state, the temperature control system adjusts and controls the temperature of the controlled object according to the final temperature of the controlled object.
For ease of understanding, the following description is given in terms of a specific embodiment. Referring to fig. 3, wherein the vertical axis represents temperature and the horizontal axis represents time; curve 1 represents the temperature actually detected by the temperature sensor and the feedback time thereof, and curve 2 represents the temperature estimated by the formula to be finally temperature-fed back and the feedback time thereof. For ease of understanding, further reference is made to the following table:
| percentage of final temperature | 80％ | 85％ | 90％ |
| Actual feedback duration | 1100ms | 1700ms | 2400ms |
| Estimating feedback duration | 400ms | 500ms | 600ms |
Wherein, the temperature sensor actually detects and feeds back 80% of the final temperature, and the required time length is about: 1100ms, and the time required to estimate and feed back 80% of the final temperature by the formula is about: 400 ms. The temperature sensor actually detects and feeds back 85% of the final temperature, and the required time period is about: 1700ms, and 85% of the final temperature is estimated and fed back by the formula, the required time period being about: 500 ms. The temperature sensor actually detects and feeds back 90% of the final temperature, and the required time period is about: 2400ms, and 90% of the final temperature is estimated and fed back by the formula, the required time period being about: 600 ms.
It is apparent that the time period required for estimating the feedback final temperature by the formula is reduced, thereby improving the response speed of the temperature sensor.
In this embodiment, the final temperature of the controlled object when the controlled object reaches the stable temperature state is calculated by obtaining the measured temperature of the controlled object at the current moment detected by the temperature sensor, the temperature change rate of the controlled object detected by the temperature sensor, and the thermal conductivity of the temperature sensor, based on newton's law of heat dissipation, according to the measured temperature, the temperature change rate, and the thermal conductivity, and feeding back the final temperature of the controlled object to the temperature control system. The final temperature of the controlled object in the stable temperature state is calculated before the controlled object reaches the stable temperature state, so that the temperature response speed of the temperature sensor is improved, and the control speed and accuracy of the temperature control system are improved. The temperature control system adopts the temperature sensor with general performance, and can realize quick temperature response, thereby reducing the cost of the temperature control system and enabling the temperature response of the sensor with high performance to be quicker.
Further, based on the first embodiment, a second embodiment of the temperature feedback method of the present invention is provided, wherein the step of determining the final temperature of the controlled object in the stable temperature state according to the measured temperature, the temperature change rate and the thermal conductivity coefficient comprises:
calculating the final temperature of the controlled object in a stable temperature state according to the following first formula:
t＝T+K*T'
wherein T is the final temperature, T is the measured temperature, K is the thermal conductivity, and T' is the temperature change rate.
In particular, the formula of the heat absorbed (or given off) by the object can be derived from the heat transfer rate of the controlled object, wherein the formula is:
wherein,is the heat transfer rate of the controlled object, T is the measured temperature of the controlled object at the current moment, T is the final temperature of the controlled object in the stable temperature state,is the rate of change of temperature (i.e., T') of the controlled object, c is the specific heat capacity of the controlled object, and m is the mass of the controlled object.
From the property that the heat dissipation rate of the object at a certain temperature is in direct proportion to the temperature reduction of the object in unit time (Newton's law of heat dissipation), the following relationship exists between the heat dissipation rate of the controlled object at a certain temperature and the temperature reduction of the controlled object in unit time:
wherein,is the heat dissipation rate of the controlled object, T is the measured temperature of the controlled object at the current moment, T is the final temperature of the controlled object in a stable temperature state, K1Is a scaling factor.
The formula I and the formula II are combined to obtain:
wherein T is the measured temperature of the controlled object at the current moment, T is the final temperature of the controlled object in a stable temperature state, c is the specific heat capacity of the controlled object, m is the mass of the controlled object, K1 is a proportionality coefficient,t' andboth represent the rate of change of temperature of the controlled object.
In the embodiment of the present invention, the thermal conductivity is set as follows:
K＝cm*K1fourthly formula
Where K denotes a thermal conductivity of the temperature sensor, c is a specific heat capacity of the controlled object, m is a mass of the controlled object, and K1 is a proportionality coefficient.
The formula for calculating the final temperature of the controlled object in the stable temperature state can be obtained by combining the formula III and the formula IV, wherein the formula is as follows:
t + K T
Wherein T is the final temperature of the controlled object in the stable temperature state, T is the measured temperature of the controlled object at the current moment, K is the thermal conductivity of the temperature sensor, and T' is the temperature change rate of the controlled object.
Therefore, when the measured temperature of the controlled object at the current moment, the temperature change rate of the controlled object and the thermal conductivity of the temperature sensor are obtained, the final temperature of the controlled object in the stable temperature state can be directly calculated according to the formula (i.e. the first formula).
In this embodiment, a calculation formula of the final temperature of the controlled object in the stable temperature state is derived through newton's law of heat dissipation, and based on the calculation formula of the final temperature of the controlled object in the stable temperature state, the measured temperature of the controlled object at the current time, the current temperature change rate of the controlled object, and the thermal conductivity of the temperature sensor obtained through experimental determination are obtained, and the final temperature of the controlled object reaching the stable temperature state is obtained through calculation, so that the final temperature of the controlled object can be accurately estimated in advance, and the response speed of the temperature sensor to the temperature is improved.
Further, based on the first embodiment, a third embodiment of the temperature feedback method according to the present invention is provided, wherein the step of obtaining the temperature change rate of the controlled object detected by the temperature sensor includes:
step a, acquiring a first temperature of a controlled object at a previous moment and a second temperature of the controlled object at a later moment, which are detected by the temperature sensor;
in order to obtain the current temperature change rate of the controlled object, at least the temperatures of the controlled object at any two moments during the temperature change and the time intervals of the two moments need to be obtained.
Specifically, a first temperature of the controlled object detected by the temperature sensor at a preceding time and a second temperature of the controlled object detected by the temperature sensor at a succeeding time are acquired.
The first temperature is the temperature of the controlled object detected by the temperature sensor in advance, among the temperatures of the controlled object at any two times during the temperature change period. The second temperature is the temperature of the controlled object detected later by the temperature sensor, out of the temperatures of the controlled object obtained at any two times during the temperature change period. The first temperature and the second temperature are both the temperature of the controlled object detected by the temperature sensor, and the difference between the first temperature and the second temperature is as follows: the first temperature is a previously detected temperature, and the second temperature is a subsequently detected temperature, that is, the temperature of the controlled object changes from the first temperature to the second temperature.
B, acquiring the change duration of the controlled object detected by the temperature sensor from the first temperature to the second temperature;
the time duration refers to a time interval between the time interval when the temperature sensor detects that the controlled object is changed from the first temperature to the second temperature, specifically, the time interval between the time interval when the temperature sensor detects that the controlled object is the first temperature and the time interval when the temperature sensor detects that the controlled object is the second temperature.
And c, determining the temperature change rate according to the first temperature, the second temperature and the change time length.
And subtracting the second temperature from the first temperature, and dividing the second temperature by the change duration to obtain a value serving as the current temperature change rate of the controlled object. Specifically, the temperature change rate of the controlled object is calculated according to the following second formula:
T'＝(T1-T2)/t1
wherein T' is the temperature change rate of the controlled object, T1A first temperature of the controlled object detected by the temperature sensorDegree, T2A second temperature, t, of the controlled object detected by the temperature sensor1The time length of the change of the controlled object from the first temperature to the second temperature is defined.
Further, step c comprises:
calculating the temperature change rate according to a second formula, wherein the formula is as follows:
T'＝(T1-T2)/t1
wherein T' is the temperature change rate, T1Is the first temperature, T2Is the second temperature, t1Is the change duration.
For ease of understanding, a specific embodiment is described. For example, if the first temperature of the controlled object detected by the temperature sensor for the first time is 30 ℃, the second temperature of the controlled object detected by the temperature sensor for the second time is 20 ℃, and the time interval between the detection of the first temperature and the detection of the second temperature by the temperature sensor is 10 seconds (i.e., the time required for the controlled object to change from the first temperature of 30 ℃ to the second temperature of 20 ℃ is 10 seconds), the temperature change rate of the controlled object is: (30-20)/10-1 ℃/sec.
In the embodiment, the current temperature change rate of the controlled object is accurately calculated by acquiring and according to the first temperature of the controlled object detected by the temperature sensor for the first time, the second temperature of the controlled object detected by the temperature sensor for the second time, and the change duration of the controlled object from the first temperature to the second temperature, so that accurate data is provided for subsequently estimating the final temperature of the controlled object reaching the stable temperature state in advance.
Further, based on the first embodiment, a fourth embodiment of the temperature feedback method of the present invention is provided, where the step of obtaining the thermal conductivity of the temperature sensor includes:
step d, acquiring the initial test temperature of the temperature sensor;
because the temperature sensors are arranged in different ways and have different thermal conductivity coefficients, the thermal conductivity coefficients of the temperature sensors need to be measured according to different sensor arrangement ways.
In order to obtain the thermal conductivity of the temperature sensor, at least the current temperature change rate of the temperature sensor, the initial test temperature of the temperature sensor at the starting moment and the final test temperature of the temperature sensor in a stable temperature state are determined. In order to determine the current temperature change rate of the temperature sensor, at least the initial test temperature of the temperature sensor at the initial moment, the final test temperature of the temperature sensor in the stable temperature state, and the time interval from the initial test temperature to the final test temperature of the temperature sensor in the stable temperature state need to be obtained.
The initial test temperature refers to the temperature of the detected temperature sensor at the starting time. Specifically, an initial test temperature of the temperature sensor is first acquired.
Step e, acquiring the final test temperature of the temperature sensor, and acquiring the duration of the temperature sensor changing from the initial test temperature to the final test temperature;
the final test temperature refers to the temperature of the detected temperature sensor when the temperature sensor reaches the stable temperature state. Specifically, the final test temperature of the temperature sensor reaching the stable temperature state is obtained, and the duration of the temperature sensor from the initial test temperature to the final test temperature reaching the stable temperature state is obtained.
Wherein, initial test temperature and final test temperature are temperature sensor's temperature, and initial test temperature and final test temperature's difference lies in: the initial test temperature is the temperature of the temperature sensor detected before the temperature of the temperature sensor changes, and the final test temperature is the temperature of the temperature sensor detected after the temperature sensor reaches a stable temperature state.
And f, determining the heat conductivity coefficient of the temperature sensor according to the initial test temperature, the final test temperature and the duration.
Specifically, the thermal conductivity of the temperature sensor is calculated according to the following third formula:
wherein K is the thermal conductivity of the temperature sensor, T3Is the initial test temperature, T, of the temperature sensor4Is the final test temperature of the temperature sensor, t2For temperature sensor composed of T3Change to T4The duration of (c).
The heat conductivity coefficient of the temperature sensor can be calculated according to the formula only by acquiring the initial test temperature and the final test temperature of the temperature sensor and the duration of the temperature sensor changing from the initial test temperature to the final test temperature.
In this embodiment, after the setting mode of the temperature sensor is determined, the initial test temperature and the final test temperature of the temperature sensor are measured, and the duration of the temperature sensor changing from the initial test temperature to the final test temperature is calculated by a formula, so that the thermal conductivity of the temperature sensor can be accurately determined, and accurate data is provided for subsequently estimating the final temperature of the controlled object before the controlled object reaches a stable temperature state.
Further, step f comprises:
calculating the thermal conductivity according to the following third formula:
wherein K is a thermal conductivity of the temperature sensor, T3 is the initial test temperature, T4 is the final test temperature, and T2 is the duration.
In particular, the heat transfer rate of the temperature sensor can be derived from the formula of the heat absorbed (or given off) by the object, wherein the formula is:
wherein,is the heat transfer rate of the temperature sensor, T3Is the initial test temperature, T, of the temperature sensor4Being the final test temperature (i.e. the stable temperature) of the temperature sensor,is the rate of change of temperature (i.e., T') of the temperature sensor, c is the specific heat capacity of the temperature sensor, and m is the mass of the temperature sensor.
The heat dissipation rate of the temperature sensor at a certain temperature and the temperature reduction of the temperature sensor in unit time have the following relationship by the property that the heat dissipation rate of an object at a certain temperature is in direct proportion to the temperature reduction of the object in unit time:
wherein,is the heat dissipation rate, T, of the temperature sensor3Is the initial test temperature, T, of the temperature sensor4Is the final test temperature (i.e., stabilization temperature), K, of the temperature sensor1Is a scaling factor.
The simultaneous reaction of the formulas (VI) and (VII) gives:
wherein, T3Is the initial test temperature, T, of the temperature sensor4Is the final test temperature (i.e., the stable temperature) of the temperature sensor, c is the specific heat capacity of the temperature sensor, m is the mass of the temperature sensor, K1Is a coefficient of proportionality that is,t' andall represent temperatureThe rate of change of temperature of the sensor.
In the embodiment of the present invention, the thermal conductivity is set as follows:
K＝cm*K1
wherein K represents the thermal conductivity of the temperature sensor, c is the specific heat capacity of the temperature sensor, m is the mass of the temperature sensor, K1Is a scaling factor.
Therefore, according to the formula (i), a calculation formula (i.e., a third expression) of the thermal conductivity of the temperature sensor can be obtained, wherein the formula is as follows:
wherein K is the thermal conductivity of the temperature sensor, T3Is the initial test temperature, T, of the temperature sensor4Is the final test temperature of the temperature sensor, t2For temperature sensor temperature from T3Change to T4The duration of (c).
Therefore, the heat conductivity coefficient of the temperature sensor can be calculated according to the formula only by acquiring the initial test temperature and the final test temperature of the temperature sensor and the duration of the temperature sensor changing from the initial test temperature to the final test temperature.
In this embodiment, after the setting mode of the temperature sensor is determined, the initial test temperature and the final test temperature of the temperature sensor are measured, and the duration of the temperature sensor changing from the initial test temperature to the final test temperature is calculated by a formula, so that the thermal conductivity of the temperature sensor can be accurately determined, and accurate data is provided for subsequently estimating the final temperature of the controlled object before the controlled object reaches a stable temperature state.
In addition, referring to fig. 4, an embodiment of the present invention further provides a temperature feedback device, where the temperature feedback device includes:
the first acquiring module 10 is configured to acquire a measured temperature of a controlled object detected by a temperature sensor at a current moment;
a second obtaining module 20, configured to obtain a temperature change rate of the controlled object detected by the temperature sensor and a thermal conductivity of the temperature sensor;
and the feedback module 30 is configured to determine and feed back a final temperature of the controlled object in a stable temperature state according to the measured temperature, the temperature change rate, and the thermal conductivity.
Further, the feedback module 30 includes a first calculation module for:
calculating the final temperature of the controlled object in a stable temperature state according to the following first formula:
t＝T+K*T'
wherein T is the final temperature, T is the measured temperature, K is the thermal conductivity, and T' is the temperature change rate.
Further, the second obtaining module 20 includes:
a first acquisition unit configured to acquire a first temperature of the controlled object at a preceding time and a second temperature of the controlled object at a succeeding time, which are detected by the temperature sensor;
a second acquiring unit, configured to acquire a change duration in which the first temperature of the controlled object detected by the temperature sensor changes to the second temperature;
and the temperature change rate determining unit is used for determining the temperature change rate according to the first temperature, the second temperature and the change time length.
Further, the temperature change rate determination unit includes a second calculation module configured to:
calculating the temperature change rate according to a second formula, wherein the formula is as follows:
T'＝(T1-T2)/t1
wherein T' is the temperature change rate, T1Is the first temperature, T2Is the second temperature, t1Is the change duration.
Further, the second obtaining module 20 includes:
the third acquisition unit is used for acquiring the initial test temperature of the temperature sensor;
the fourth acquisition unit is used for acquiring the final test temperature of the temperature sensor and acquiring the duration of the temperature sensor changing from the initial test temperature to the final test temperature;
and the heat conductivity coefficient determining unit is used for determining the heat conductivity coefficient of the temperature sensor according to the initial test temperature, the final test temperature and the duration.
Further, the thermal conductivity determination unit comprises a third calculation module for:
calculating the thermal conductivity according to the following third formula:
wherein K is the thermal conductivity of the temperature sensor, T3Is the initial test temperature, T4For the final test temperature, t2Is the duration.
And the temperature adjusting and controlling module is used for adjusting or controlling the temperature of the controlled object according to the final temperature.
In addition, an embodiment of the present invention further provides a readable storage medium, where a temperature feedback program is stored, and the temperature feedback program, when executed by a processor, implements the steps of the temperature feedback method as described above.
For specific implementation of the readable storage medium of the present invention, reference may be made to the embodiments of the temperature feedback method described above, which are not described herein again.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
It should be noted that in the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The invention may be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by one and the same item of hardware. The usage of the words first, second and third, etcetera do not indicate any ordering. These words may be interpreted as names.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. A temperature feedback method, comprising:
acquiring the measured temperature of a controlled object detected by a temperature sensor at the current moment;
acquiring the temperature change rate of a controlled object detected by the temperature sensor and the heat conductivity coefficient of the temperature sensor;
and determining and feeding back the final temperature of the controlled object in a stable temperature state according to the measured temperature, the temperature change rate and the heat conductivity coefficient.
2. The temperature feedback method of claim 1, wherein the step of determining and feeding back the final temperature of the controlled object in the stable temperature state based on the measured temperature, the temperature change rate, and the thermal conductivity comprises:
calculating the final temperature of the controlled object in a stable temperature state according to the following first formula:
t＝T+K*T'
wherein T is the final temperature, T is the measured temperature, K is the thermal conductivity, and T' is the temperature change rate.
3. The temperature feedback method of claim 1, wherein the step of acquiring the rate of change of the temperature of the controlled object detected by the temperature sensor comprises:
acquiring a first temperature of a controlled object at a previous moment and a second temperature of the controlled object at a later moment, which are detected by the temperature sensor;
acquiring the change time length of the controlled object detected by the temperature sensor from the first temperature change to the second temperature;
and determining the temperature change rate according to the first temperature, the second temperature and the change time length.
4. The temperature feedback method of claim 3, wherein determining the rate of change of temperature based on the first temperature, the second temperature, and the length of change comprises:
calculating the temperature change rate according to a second formula, wherein the formula is as follows:
T'＝(T1-T2)/t1
wherein T' is the temperature change rate, T1Is the first temperature, T2Is the second temperature, t1Is the change duration.
5. The temperature feedback method of claim 1, wherein the step of obtaining the thermal conductivity of the temperature sensor comprises:
acquiring an initial test temperature of the temperature sensor;
acquiring the final test temperature of the temperature sensor, and acquiring the duration of the temperature sensor changing from the initial test temperature to the final test temperature;
and determining the heat conductivity coefficient of the temperature sensor according to the initial test temperature, the final test temperature and the duration.
6. The temperature feedback method of claim 5, wherein determining the thermal conductivity of the temperature sensor based on the initial test temperature, the final test temperature, and the duration comprises:
calculating the thermal conductivity according to the following third formula:
wherein K is the thermal conductivity of the temperature sensor, T3Is the initial test temperature, T4For the final test temperature, t2Is the duration.
7. The temperature feedback method according to any one of claims 1-6, wherein the step of determining and feeding back the final temperature of the controlled object in the steady temperature state based on the measured temperature, the temperature change rate, and the thermal conductivity further comprises:
and regulating or controlling the temperature of the controlled object according to the final temperature.
8. A temperature feedback device, comprising:
the first acquisition module is used for acquiring the measured temperature of the controlled object detected by the temperature sensor at the current moment;
the second acquisition module is used for acquiring the temperature change rate of the controlled object detected by the temperature sensor and the heat conductivity coefficient of the temperature sensor;
and the feedback module is used for determining and feeding back the final temperature of the controlled object in a stable temperature state according to the measured temperature, the temperature change rate and the heat conductivity coefficient.
9. A temperature control system, comprising: a memory, a processor and a temperature feedback program stored on the memory and executable on the processor, the temperature feedback program when executed by the processor implementing the steps of the temperature feedback method according to any one of claims 1 to 7.
10. A readable storage medium, having stored thereon a temperature feedback program which, when executed by a processor, implements the steps of the temperature feedback method of any one of claims 1 to 7.
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