CN112487637A - Method for detecting ambient temperature by self-heating equipment - Google Patents
Method for detecting ambient temperature by self-heating equipment Download PDFInfo
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- CN112487637A CN112487637A CN202011359169.8A CN202011359169A CN112487637A CN 112487637 A CN112487637 A CN 112487637A CN 202011359169 A CN202011359169 A CN 202011359169A CN 112487637 A CN112487637 A CN 112487637A
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 46
- 238000000034 method Methods 0.000 title claims abstract description 21
- 230000017525 heat dissipation Effects 0.000 claims abstract description 28
- 230000007613 environmental effect Effects 0.000 claims abstract description 9
- 238000005259 measurement Methods 0.000 abstract description 7
- 238000007599 discharging Methods 0.000 description 10
- 238000009529 body temperature measurement Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
- 238000012790 confirmation Methods 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 230000020169 heat generation Effects 0.000 description 2
- 239000002918 waste heat Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2119/00—Details relating to the type or aim of the analysis or the optimisation
- G06F2119/08—Thermal analysis or thermal optimisation
Abstract
The invention discloses a method for detecting environmental temperature by self-heating equipment, which comprises the following steps: acquiring a heat dissipation function model delta T1 ═ f (T) after the equipment stops running and acquiring a heating function model delta T2 ═ R (T) when the equipment works; obtaining a difference value delta f0 of a value measured by the temperature sensor relative to the ambient temperature when the operation is stopped according to the heating function model, and obtaining a corresponding stop time point Tf on the heat dissipation function model according to delta f 0; the equipment records a time interval t1 from stopping running to running again, and according to the heat dissipation function model, the deviation initial value delta s of the value measured by the temperature sensor and the environmental temperature when the equipment starts running is determined; recording the running time T0 of the equipment, and obtaining the difference value delta T3 of the value measured by the equipment temperature sensor at the current time point relative to the actual environment temperature according to the deviation initial value delta s and the heating function model; the temperature T of the environment outside the apparatus at this time is calculated from the measurement value Ti of the temperature sensor inside the apparatus by Ti- Δ T3.
Description
Technical Field
The invention relates to a method for detecting ambient temperature, in particular to a method for detecting ambient temperature by self-heating equipment.
Background
In the prior art, a plurality of devices are provided with a temperature sensor for detecting the ambient temperature so as to determine the ambient temperature of the devices. Because the equipment generates heat inevitably when running, the temperature collected by the temperature sensor inside the equipment is different from the ambient temperature, and the problem of inaccurate measurement exists. In order to improve this problem, in the prior art, a plurality of sensors are integrated at different locations inside the device, a compensation value is set by means of the measured values of the internal temperature sensors and by means of the heat that may be generated by the power consumption of the device, and the ambient temperature is estimated in combination, but this method still has difficulty in accurately determining the actual ambient temperature.
Disclosure of Invention
The invention aims to provide a method for detecting the ambient temperature by self-heating equipment, aiming at the defects in the prior art, so that the influence of the self-heating of the equipment on the measurement accuracy can be reduced, and the measurement accuracy of the ambient temperature can be improved.
In order to achieve the purpose, the invention provides a method for detecting the ambient temperature by self-heating equipment, which comprises the following steps:
obtaining a model:
step S1, obtaining a heat dissipation function model delta T1 ═ f (T) after equipment stops running;
s2, acquiring a heating function model delta T2 ═ R (T) when the equipment works;
determining the ambient temperature:
b1, obtaining a difference value delta f0 of a value measured by a temperature sensor relative to the ambient temperature when the operation is stopped according to the heating function model, and obtaining a corresponding stopping time point Tf on the heat dissipation function model according to delta f 0;
b2, recording a time interval t1 from stop operation to re-operation by the equipment, and determining a deviation initial value delta s of a value measured by the temperature sensor and the environmental temperature when the equipment starts to operate according to the heat dissipation function model;
b3, recording the running time T0 of the equipment, and obtaining the difference value delta T3 of the numerical value measured by the equipment temperature sensor at the current time point relative to the actual environment temperature according to the deviation initial value delta s and the heating function model;
and step B4, calculating the external environment temperature T of the equipment at the moment to be Ti-delta T3 according to the measured value Ti of the temperature sensor in the equipment.
In addition, the invention also provides the following auxiliary technical scheme:
the heat dissipation function model Δ T1 ═ f (T) is established as follows: according to the temperature sensor arranged in the equipment and the temperature sensor in the environment, a first discrete point group W1 of the difference value of the measured values of the temperature sensor in the equipment and the temperature sensor in the environment after the operation is stopped and the time is obtained, and the heat dissipation function model delta T1 is obtained by fitting the first discrete point group W1.
The heat-generating function model Δ T2 ═ r (T) is built up as follows: and obtaining a second discrete point group W2 of the difference value of the measured values of the temperature sensor in the equipment and the temperature sensor in the environment and the time when in work according to the temperature sensor arranged in the equipment and the temperature sensor in the environment, and fitting the second discrete point group W2 to obtain the heating function model delta T2-R (T).
In step B1, the device records the end time point Tt of the shutdown, and obtains Δ f0 ═ r (Tt) according to the heat-generating function model.
In the step B2, the device records the time interval t1 from the stop operation to the re-operation, and then the corresponding stop end time point Ts is Tf + t1, and the deviation starting value Δ s can be obtained from Ts on the heat dissipation function model.
In step B3, the corresponding re-operating time point Xs is obtained on the basis of the initial deviation value Δ s, where Δ T3 is R (T0+ Xs).
In step S2, a charge-discharge battery is provided in the device, and a charge-heat function model Δ Tc ═ rc (t) in which the device is operated and the battery is in a charged state and a discharge-heat function model Δ Tf ═ rf (t) in which the device is operated and the battery is in a discharged state are established.
Compared with the prior art, the invention has the advantages that:
1. the change relation between the difference value between the temperature measured by the temperature sensor in the equipment and the actual environment temperature and the time is obtained by establishing a heat dissipation function model and a heating function model, and when the environment temperature is determined according to the measured value of the temperature sensor, the measurement error of the self-heating of the equipment can be fully considered, so that the influence of the self-heating of the equipment on the calculated environment temperature value can be reduced, and the accuracy of environment temperature measurement is improved;
2. the invention fully considers the influence of the waste heat after the equipment operates for the last time, and adds the influence factor into the evaluation and confirmation of the environmental temperature when the equipment operates again, thereby further improving the accuracy of the environmental temperature measurement;
3. the invention fully considers different heating influences when equipment with a charging and discharging battery runs, and further improves the accuracy of environment temperature measurement.
Drawings
Fig. 1 is a schematic diagram of a built heat dissipation function model.
Fig. 2 is a schematic diagram of the established heat function model.
Fig. 3 is a schematic diagram of the established charge and discharge heat function models.
FIG. 4 is a schematic illustration of determining Δ f0 according to a heat function model.
Fig. 5 is a diagram of Tf and Δ s determined from a model of the heat dissipation function.
FIG. 6 is a schematic diagram of the determination of Xs and Δ T3 from a heat function model.
Fig. 7 is a schematic diagram of determining corresponding Δ T4 and Δ T5 from a charge heating function model and a discharge heating model, respectively.
Detailed Description
The present invention will be described in further non-limiting detail with reference to the following preferred embodiments and accompanying drawings.
A method of detecting an ambient temperature of a self-heating apparatus according to a preferred embodiment of the present invention includes a step of obtaining a model and a step of determining the ambient temperature.
Specifically, the step of obtaining the model includes:
step S1, a heat dissipation function model after the operation of the equipment is stopped is obtained, and after the heat dissipation function model reacts to the stop of the equipment, the difference value of the temperature value measured by a temperature sensor in the equipment relative to the actual environment temperature value changes along with the time.
As shown in fig. 1, the heat dissipation function model can be established by the following method: after the equipment stops running, the temperature sensors arranged in the equipment and the temperature sensors in the environment measure the temperature, so that a first discrete point group W1 of the difference value of the measured data of the two temperature sensors and the corresponding time is obtained, the first discrete point group W1 is fitted into a curve by a least square method, and then the heat dissipation function model delta T1 is f (T).
And S2, acquiring a heating function model when the equipment runs, wherein the heating function model reflects the change of the difference value of the temperature value measured by a temperature sensor in the equipment relative to the actual environment temperature value along with the time when the equipment runs.
As shown in fig. 2, the heat function model can be established by the following method: after the equipment starts to operate, the temperature can be measured by a temperature sensor arranged in the equipment and a temperature sensor in the environment, so that a second discrete point group W2 of the difference value of the measured data of the two temperature sensors and the corresponding time is obtained, the second discrete point group W2 is fitted into a curve by a least square method, and the corresponding heat generation function model delta T2-R (T) is obtained.
For a device with a rechargeable battery inside, the battery may be in a charging state or a discharging state during operation, and the heating function models in these two cases are different, so as shown in fig. 3, a charging heating function model Δ Tc ═ rc (t) during operation of the device and while the battery is in charging, and a discharging heating function model Δ Tf ═ rf (t) during operation of the device and while the battery is in discharging may be respectively established to make the finally obtained measurement result closer to the actual ambient temperature.
Determining the ambient temperature:
step b1, as shown in fig. 4, when the operation is stopped, the apparatus records an operation end time Tt from the start of the operation to the stop of the operation, and obtains a difference value Δ f0 ═ r (Tt) between the value measured by the temperature sensor at the time of the stop of the operation and the ambient temperature from the heat function model, and Δ f0 is an ordinate corresponding to the Tt value on the heat function model. Then, as shown in fig. 5, a corresponding stop time point Tf is obtained on the heat dissipation function model according to Δ f0, and Tf is an abscissa corresponding to Δ f0 on the heat dissipation function model.
Step b2, as shown in fig. 5, the device records a time interval t1 from the stop of the operation to the operation again, and the corresponding stop end time point Ts is Tf + t 1; and determining the initial state of the equipment after the equipment operates again according to the heat dissipation function model delta T1 ═ f (T), namely determining the initial deviation value delta s of the value measured by the temperature sensor relative to the actual environment temperature during the operation again, wherein the initial deviation value delta s is the vertical coordinate corresponding to Ts on the heat dissipation function model.
Step b3, as shown in fig. 6, an abscissa corresponding to the ordinate Δ s is obtained from the heat function model Δ T2 ═ r (T), and the abscissa is the rerun time point Xs.
In this step, for a device with a charging/discharging battery, the heating function model curve may be selected according to the actual charging/discharging state, the charging/discharging state after the device is restarted may be recorded, and the corresponding heating function model Δ Tc ═ rc (t) or Δ Tf ═ rf (t) may be selected.
Step B4. records the operation time period T0 after the device is operated again, and then the difference Δ T3 (T0+ Xs) of the value measured by the device temperature sensor after the operation time period T0 relative to the actual ambient temperature can be obtained according to the heating function model curve Δ T2 (R) (T).
In this step, for a device with a charging and discharging battery, as shown in fig. 7, a corresponding heat generation function model curve is selected according to the charging and discharging state, and a temperature difference Δ T4 ═ Rc (T0+ Xs) in the charging state of the battery is obtained; the temperature difference Δ T5 in the battery discharge state becomes Rf (T0+ Xs).
Step B5. calculates the ambient temperature T outside the device at this time as Ti- Δ T3 from the measured value Ti of the device internal temperature sensor.
It can be understood that the heating function model and the heat dissipation function model are preset in the control system of the device, and a specific function model can be obtained or simulated in advance according to the environment in which the device needs to be arranged, and after the corresponding function model is obtained, the device can be applied to the corresponding environment, and the function model is called to obtain more accurate test temperature when the temperature is actually measured. The device can store a plurality of function models corresponding to different installation environments, and when the device is installed in different environments, the corresponding models can be selected, so that the device is very convenient.
The method for detecting the environmental temperature by the self-heating equipment at least has the following advantages:
1. the change relation between the difference value between the temperature measured by the temperature sensor in the equipment and the actual environment temperature and the time is obtained by establishing a heat dissipation function model and a heating function model, and the measurement difference value generated by the equipment self-heating can be fully considered when the environment temperature is determined according to the measured value of the temperature sensor, so that the influence of the equipment self-heating on the calculated environment temperature value can be reduced, and the accuracy of environment temperature measurement is improved;
2. the invention fully considers the influence of the waste heat after the equipment operates for the last time, and adds the influence factor into the evaluation and confirmation of the environmental temperature after the equipment operates again, thereby further improving the accuracy of the environmental temperature measurement;
3. the invention fully considers different heating influences when equipment with a charging and discharging battery runs, and further improves the accuracy of environment temperature measurement.
It should be noted that the above-mentioned preferred embodiments are merely illustrative of the technical concepts and features of the present invention, and are intended to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.
Claims (7)
1. A method for detecting the ambient temperature by self-heating equipment is characterized by comprising the following steps:
obtaining a model:
step S1, obtaining a heat dissipation function model delta T1 ═ f (T) after equipment stops running;
s2, acquiring a heating function model delta T2 ═ R (T) when the equipment works;
determining the ambient temperature:
b1, obtaining a difference value delta f0 of a value measured by a temperature sensor relative to the ambient temperature when the operation is stopped according to the heating function model, and obtaining a corresponding stopping time point Tf on the heat dissipation function model according to delta f 0;
b2, recording a time interval t1 from stop operation to re-operation by the equipment, and determining a deviation initial value delta s of a value measured by the temperature sensor and the environmental temperature when the equipment starts to operate according to the heat dissipation function model;
b3, recording the running time T0 of the equipment, and obtaining the difference value delta T3 of the numerical value measured by the equipment temperature sensor at the current time point relative to the actual environment temperature according to the deviation initial value delta s and the heating function model;
and step B4, calculating the external environment temperature T of the equipment at the moment to be Ti-delta T3 according to the measured value Ti of the temperature sensor in the equipment.
2. The method for detecting an ambient temperature of a self-heating apparatus according to claim 1, characterized in that: the heat dissipation function model Δ T1 ═ f (T) is established as follows: according to the temperature sensor arranged in the equipment and the temperature sensor in the environment, a first discrete point group W1 of the difference value of the measured values of the temperature sensor in the equipment and the temperature sensor in the environment after the operation is stopped and the time is obtained, and the heat dissipation function model delta T1 is obtained by fitting the first discrete point group W1.
3. The method for detecting an ambient temperature of a self-heating apparatus according to claim 1, characterized in that: the heat-generating function model Δ T2 ═ r (T) is built up as follows: and obtaining a second discrete point group W2 of the difference value of the measured values of the temperature sensor in the equipment and the temperature sensor in the environment and the time when in work according to the temperature sensor arranged in the equipment and the temperature sensor in the environment, and fitting the second discrete point group W2 to obtain the heating function model delta T2-R (T).
4. The method for detecting an ambient temperature of a self-heating apparatus according to claim 1, characterized in that: in step B1, the device records the end time point Tt of the shutdown, and obtains Δ f0 ═ r (Tt) according to the heat-generating function model.
5. The method for detecting an ambient temperature of a self-heating apparatus according to claim 1, characterized in that: in the step B2, the device records the time interval t1 from the stop operation to the re-operation, and then the corresponding stop end time point Ts is Tf + t1, and the deviation starting value Δ s can be obtained from Ts on the heat dissipation function model.
6. The method for detecting an ambient temperature of a self-heating apparatus according to claim 1, characterized in that: in step B3, the corresponding re-operating time point Xs is obtained on the basis of the initial deviation value Δ s, where Δ T3 is R (T0+ Xs).
7. The method for detecting an ambient temperature of a self-heating apparatus according to claim 1, characterized in that: in step S2, a charge-discharge battery is provided in the device, and a charge-heat function model Δ Tc ═ rc (t) in which the device is operated and the battery is in a charged state and a discharge-heat function model Δ Tf ═ rf (t) in which the device is operated and the battery is in a discharged state are established.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117332621A (en) * | 2023-12-01 | 2024-01-02 | 杭州万高科技股份有限公司 | Calibration method for environmental temperature measurement by temperature controller |
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