CN113155291A - Temperature distribution monitoring device and monitoring method thereof - Google Patents
Temperature distribution monitoring device and monitoring method thereof Download PDFInfo
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- CN113155291A CN113155291A CN202110304357.9A CN202110304357A CN113155291A CN 113155291 A CN113155291 A CN 113155291A CN 202110304357 A CN202110304357 A CN 202110304357A CN 113155291 A CN113155291 A CN 113155291A
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 25
- 238000012806 monitoring device Methods 0.000 title claims abstract description 23
- 238000000034 method Methods 0.000 title claims abstract description 17
- 230000004044 response Effects 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 9
- 238000012546 transfer Methods 0.000 claims description 6
- 238000012360 testing method Methods 0.000 claims description 3
- 244000144972 livestock Species 0.000 abstract description 10
- 238000009529 body temperature measurement Methods 0.000 abstract description 5
- 230000008859 change Effects 0.000 abstract description 4
- 238000009434 installation Methods 0.000 abstract description 4
- 239000003570 air Substances 0.000 description 15
- 229910000679 solder Inorganic materials 0.000 description 11
- 244000144977 poultry Species 0.000 description 9
- 235000013594 poultry meat Nutrition 0.000 description 9
- 238000001931 thermography Methods 0.000 description 8
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000009395 breeding Methods 0.000 description 2
- 230000001488 breeding effect Effects 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000011900 installation process Methods 0.000 description 2
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- 241000287828 Gallus gallus Species 0.000 description 1
- 241001465754 Metazoa Species 0.000 description 1
- 241000282887 Suidae Species 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000012080 ambient air Substances 0.000 description 1
- 230000006399 behavior Effects 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 235000013330 chicken meat Nutrition 0.000 description 1
- 238000010835 comparative analysis Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/48—Thermography; Techniques using wholly visual means
- G01J5/485—Temperature profile
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K3/00—Thermometers giving results other than momentary value of temperature
- G01K3/08—Thermometers giving results other than momentary value of temperature giving differences of values; giving differentiated values
- G01K3/14—Thermometers giving results other than momentary value of temperature giving differences of values; giving differentiated values in respect of space
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J2005/0077—Imaging
Abstract
The invention provides a temperature distribution monitoring device and a monitoring method thereof, comprising a plurality of heat exchange bodies, a supporting component and a thermal imager, wherein the plurality of heat exchange bodies are fixed on the position needing to acquire temperature information in a house through the supporting component, the supporting component can support the heat exchange bodies at a proper height, the thermal imager is placed at a proper machine position to shoot each heat exchange body simultaneously, and the temperature of each heat exchange body is displayed in an image form, because the heat exchange body can change rapidly along with the change of the indoor temperature, thereby more intuitively reflecting the temperature distribution condition in the house, and the installation method is simpler, easy to maintain and lower in cost, solving the technical problems that the traditional temperature measurement method can not intuitively display the air temperature distribution condition in the livestock house, is inconvenient to install and has high cost, and the problem of overlarge monitoring error caused by insufficient heat exchange of the heat exchange body before monitoring is avoided by determining the heat exchange time.
Description
Technical Field
The invention relates to the technical field of livestock and poultry breeding, in particular to a temperature distribution monitoring device and a monitoring method thereof.
Background
The appropriateness of the thermal environment is a relatively important reference factor for judging the quality of livestock and poultry breeding, particularly, animals such as pigs, chickens and cattle are even dead when the temperature deviation condition is serious, so that the temperature data is also extremely important when the environmental data in the livestock and poultry house is obtained, and in the prior art, the temperature sensor is usually hung on a wall body or a specific position in the livestock and poultry house, so that the temperature in the house is known.
Research shows that the distribution situation of the air temperature in the house is beneficial to realizing the accurate regulation and control of the thermal environment of the livestock and poultry house, the temperature in the house obtained by a single temperature sensor is only the local temperature of the position of the temperature sensor, because the structure of the livestock and poultry house is complex, when the temperature of the position of the temperature sensor is appropriate, other positions are probably higher or lower, the temperature distribution situation in the house needs to be known, appropriate temperature compensation measures need to be carried out according to the temperature distribution situation, if the temperatures of a plurality of positions in the house need to be mastered, the temperature sensors need to be arranged at a plurality of positions in the house in the traditional temperature measurement mode, the temperature data of each temperature sensor are collected in sequence and judged after comparative analysis, and therefore, the traditional temperature measurement method cannot visually display the temperature distribution situation in the livestock and poultry house directly, and meanwhile, the installation process of the temperature sensors is complicated, and is expensive and difficult to maintain.
Disclosure of Invention
The invention provides a temperature distribution monitoring device and a monitoring method thereof, which aim to solve the technical problems that the traditional temperature measurement method cannot visually display the air temperature distribution condition in a livestock and poultry house, and meanwhile, the installation process is complicated, the price is high, and the maintenance is difficult.
A first aspect of the present invention provides a temperature distribution monitoring apparatus comprising a support assembly, a thermal imager and a plurality of heat exchange bodies; the support assembly is used for supporting the heat exchange body, and the heat exchange body is connected with the support assembly; the thermal imaging camera is used for shooting the heat exchange body.
According to the temperature distribution monitoring device of the present invention, the heat exchange body is a sphere.
According to the temperature distribution monitoring device of the present invention, the material of the heat exchange body is a material having a pyworth number satisfying "Bi < 0.1M", where M is a dimensionless number related to the geometry of the object, Bi is h (V/a)/λ, and h is a convective heat transfer coefficient of air and has a unit of w/(M/(M) M2K), V is the volume of the heat exchange body in m3A is the surface area of the heat exchange body and has the unit of m2And lambda is the thermal conductivity of the heat exchange body and has the unit of w/(m.K).
According to the temperature distribution monitoring device, the supporting component comprises a rope body, the heat exchange body is fixed on the rope body, and two ends of the rope body can be fixed on an external support.
According to the temperature distribution monitoring device, the plurality of rope bodies are matched in parallel and positioned on the same horizontal plane, and the plurality of rope bodies are connected through the connecting piece.
According to the temperature distribution monitoring device, the heat exchange body is provided with a through hole through which the rope body can penetrate, the rope body is provided with a first limiting piece and a second limiting piece, the rope body is connected with the heat exchange body in series, and the heat exchange body is located between the first limiting piece and the second limiting piece.
According to the temperature distribution monitoring device of the present invention, the first limiting member and/or the second limiting member are knots obtained by binding the rope body.
According to the temperature distribution monitoring device, hooks or hanging rings for fixing external supports are arranged at two ends of the rope body.
The temperature distribution monitoring device according to the present invention further comprises a timer, a response unit, and a controller: the timer is used for recording test time; the input end of the controller is electrically connected with the output end of the timer, and the output end of the controller is electrically connected with the timer, the input end of the response unit and the input end of the thermal imager.
According to the temperature distribution monitoring device, the response unit comprises an image acquisition unit and a storage unit, the image acquisition unit is electrically connected with the thermal imager in a bidirectional mode, and the input end of the image acquisition unit is electrically connected with the output end of the controller.
The temperature distribution monitoring device provided by the first aspect of the invention has the following beneficial effects: on being fixed in the position that needs to acquire temperature information in the house with a plurality of heat-exchanging bodies through supporting component, and simultaneously, supporting component can support the heat-exchanging body at suitable height, place the thermal imaging appearance in suitable machine position, make it can shoot every heat-exchanging body simultaneously, and show the temperature of each heat-exchanging body with the image form, change along with indoor temperature's change because of the heat-exchanging body, consequently the temperature difference of each heat-exchanging body position can be embodied directly perceivedly to the image that obtains, thereby the temperature distribution condition in the more directly perceived reflection house, and for the mode through a plurality of temperature sensor measurement temperature, this device cost is lower, and easy to maintain, and the mounting means is comparatively simple, it can to pass through supporting component with the heat exchange fixed, need not to carry out further adjustment to heat-exchanging body itself before fixed, and the installation efficiency is improved.
A second aspect of the present invention provides a temperature distribution monitoring method, which is performed using the temperature distribution monitoring apparatus provided by the present invention, and includes the following steps:
step 1: fixing a plurality of heat exchange bodies on positions, required to acquire temperature information, in the house through the support assembly;
step 2: placing the thermal imager at a proper machine position to enable each heat exchange body to be located in the shooting range of the thermal imager;
and step 3: waiting for a suitable time for the heat exchange of the heat exchange body with air, which is greater than or equal to the time constant tcWherein, tcRho cV/(hA), where rho is that of the heat exchange bodyDensity in kg/m3C is specific constant pressure heat capacity, and the unit is J/(kg.K), V is the volume of the heat exchange body, and the unit is m3H is the convective heat transfer coefficient of air and has the unit of w/(m)2K), A is the surface area of the heat exchange body in m2。
And 4, step 4: and observing the image information of the thermal imager, wherein the image information is the temperature distribution condition in the greenhouse.
The beneficial effects of the temperature distribution monitoring method provided by the second aspect of the invention are as follows: the heat exchanger needs to exchange heat with the external environment in a way of enabling the temperature of the heat exchanger to be the same as the temperature of the air at the external environment temperature, the process needs time, and after the heat exchanger is installed at a position where temperature measurement is needed, the time constant t is larger than or equal to the time constant tcWhen rho cV/(hA), the difference between the self temperature of the heat exchange body and the external ambient air temperature is small, the temperature of the heat exchange body can directly reflect the ambient temperature, the image information on the thermal imager is more accurate, and the problem of overlarge monitoring error caused by insufficient heat exchange of the heat exchange body before monitoring is solved by determining the heat exchange time.
Drawings
In order to more clearly illustrate the technical solutions of the present invention or the prior art, the drawings needed for the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a temperature distribution monitoring device according to an embodiment of the present invention;
fig. 2 is a schematic control logic diagram of a temperature distribution monitoring apparatus according to another embodiment of the present invention.
Description of reference numerals:
1. a support assembly; 11. a rope body; 111. a connecting member; 112. a first limit piece; 113. a second limiting member; 114. hooking; 2. a thermal imager; 21. a shooting range; 3. a heat exchange body; 31. and a through hole.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described below with reference to the accompanying drawings, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the embodiments of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the embodiments of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "connected" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. Specific meanings of the above terms in the embodiments of the present invention can be understood in specific cases by those of ordinary skill in the art.
In embodiments of the invention, unless expressly stated or limited otherwise, 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 intervening media. 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, reference to the description of the terms "one embodiment," "first-aspect embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means 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 an embodiment 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.
A temperature distribution monitoring apparatus provided by the present invention will be described below with reference to fig. 1 to 2.
As shown in fig. 1, one embodiment of the present invention provides a temperature distribution monitoring apparatus including a support assembly 1, a thermal imaging camera 2, and a plurality of heat exchange bodies 3; the supporting component 1 is used for supporting the heat exchange body 3, and the heat exchange body 3 is connected to the supporting component 1; the thermal imaging camera 2 is used for shooting the heat-exchange body 3, and the heat-exchange body 3 is positioned in a shooting range 21.
Because of the image that thermal imaging system 2 was taken is the plane image, if heat-exchanging body 3 is the cuboid and when certain plane is just to getting for instance the mirror, then heat-exchanging body 3 can only acquire the condition of being heated to this one side just to getting for instance the mirror, other five faces are all not in shooting scope 21, consequently make heat-exchanging body 3 be the spheroid, because of the spheroid does not have edges and corners, thermal imaging system 2 can shoot the great scope of heat-exchanging body 3, especially be located thermal imaging system 2 gets for instance the heat-exchanging body 3 of the spheroid structure under the mirror, the condition of being heated of its directly over and side can be shot by thermal imaging system 2 simultaneously, the degree of accuracy of monitoring has further been improved, and the spheroid easily carries.
According to the present embodiment, the material of the heat exchange body 3 is a material whose pyworthiness satisfies "Bi < 0.1M", where M is a dimensionless number related to the geometry of the body, M is 1 for an infinite plate, M is 1/2 for an infinite cylinder, M is 1/3 for a sphere, Bi is h (V/a)/λ, and h is the convective heat transfer coefficient of air, and has the unit w/(M/a)/λ2K), V is the volume of the heat exchange body 3 in m3A is the surface area of the heat exchange body 3 in m2And λ is the thermal conductivity of the heat exchange body 3 in units of w/(mK). The heat conduction capability of the material with the pythoready number in the range is strong, and the monitoring efficiency and accuracy can be improved.
According to the present embodiment, the support assembly 1 comprises a rope 11, the heat exchange body 3 is fixed to the rope 11, and both ends of the rope 11 can be fixed to an external support. Regard as supporting component 1 with rope body 11, simple structure, be convenient for accomodate and carry, and if supporting component 1 area is too big, partly position in the house can be sheltered from by supporting component 1 and lead to the temperature to reduce, adopts the rope body 11 that the area is little to avoid above-mentioned problem, improves the monitoring accuracy.
According to this embodiment, the rope body 11 has many, many the parallel cooperation of rope body 11 is located same horizontal plane, makes the mode of a plurality of heat exchange body 3 accessible linear array tile on a certain horizontal plane, and the measuring point is more even, because of many rope body 11 passes through connecting piece 111 and connects as an organic wholely, can fix simultaneously, has improved the convenient degree of installation.
According to this embodiment, the heat exchanger 3 is provided with a through hole 31 through which the rope 11 can pass, the rope 11 is provided with a first limiting member 112 and a second limiting member 113, the rope 11 is connected in series with the heat exchanger 3, and the heat exchanger 3 is located between the first limiting member 112 and the second limiting member 113. The heat exchange body 3 is connected with the rope body 11 in a serial connection mode, the heat exchange body 3 can slide along the rope body 11 so as to adjust the position of the heat exchange body 3, and the first limiting part 112 and the second limiting part 113 play a limiting role in the heat exchange body 3 connected in series with the rope body 11, so that the heat exchange body 3 with the adjusted position is fixed.
According to the embodiment, the first limiting part 112 and/or the second limiting part 113 are knots obtained by binding the rope body 11, and the two knots bound by the rope body 11 limit the heat exchange body 3 connected in series with the rope body 11 without adopting other parts, so that the cost is reduced.
According to the embodiment, the hooks 114 for fixing the external support are arranged at the two ends of the rope body 11, the device can be directly hung on a ceiling, a wall or a heavy object of other fixable devices through the hooks 114 with simple structure, if the surface of the external support is too flat and has no protrusion, the external support is only required to be installed on a hanging ring which can be used for the hooks 114 to penetrate and matched with the hooks 114, the heat exchanger 3 is fixed through the mode, and the installation efficiency is further improved.
As shown in fig. 2, the present invention provides another embodiment, further comprising a timer, a response unit, and a controller: the timer is used for recording test time; and the input end of the controller is electrically connected with the output end of the timer, and the output end of the controller is electrically connected with the timer, the input end of the response unit and the input end of the thermal imager 2. Because the heat exchanger exchanges heat with the external environment, the temperature of the heat exchanger and the temperature of the external environment tend to be the same in required time, after the heat exchanger 3 is installed at a proper position, the required waiting time is input in the timer, the controller sends a signal to the heat exchanger 3 to enable the heat exchanger to be started, after the waiting time is finished, the heat exchange work of the heat exchanger 3 is finished, the image information on the thermal imager 2 is more accurate, the timer sends the signal to the controller at the moment, the controller sends the signal to the response unit to respond, the response can be reminding information for reminding a worker, the worker is reminded to obtain the image information at the moment, and other proper behaviors can be carried out by sending signals to other units.
According to this embodiment, the response unit includes an image obtaining unit and a storage unit, the image obtaining unit is electrically connected to the thermal imager 2 in two directions, and an input end of the image obtaining unit is electrically connected to an output end of the controller. When the required waiting time input in the timer is finished, the controller controls the image acquisition unit to send a signal, the image acquisition unit acquires the image information of the thermal imager 2 and then transmits the image information to the storage unit for storage, and automatic image taking and storage are finished at proper time.
Yet another embodiment of the present invention provides a temperature distribution monitoring method performed using a temperature distribution monitoring apparatus provided in one embodiment shown in fig. 1, including the steps of:
And 4, observing image information of the thermal imager 2, wherein the image information is the temperature distribution condition in the greenhouse.
According to this embodiment, solder balls having a diameter of 0.005m and a density ρ of 7310kg/m are used as the heat exchanger 33The thermal conductivity coefficient lambda is 67 w/(m.K), the volume V and the area A of the solder ball can be calculated according to the above conditions, and the volume V and the area A are substituted into the calculation formula of Bi to obtain Bi of 6.2.10-5The value is far less than 0.03, and the requirement that Bi is less than 0.1M is met.
Of solder ballsThe specific pressure heat capacity c is 228J/(kg.K), and the convective heat transfer coefficient h is 1-10 w/(m.K) during the natural convection of air2K), so that h takes the value 5 w/(m)2K) the temperature of the air in the vicinity of the solder ball measured by a thermometer was 25 ℃ and obtained by a calculation method based on a time constant, tcIs 278 s.
The method for calculating the solder ball according to the lumped parameter method is known as follows:
wherein Fo is Fourier number, R is solder ball radius, unit is m, a is thermal diffusivity, t is temperature of solder ball after being placed for a period of time, t is temperature0Is the initial temperature of the solder ball, t∞Is the temperature of the air.
As can be seen from the above formula, Fo in this embodiment is 1.73 · 104And finally, substituting all parameters to obtain t of 23.28 ℃, the actual air temperature of 25 ℃ and the difference between the t and the actual air temperature of 1.72 ℃, and similarly, under the condition that the monitoring precision of the thermal imager 3 and the thermometer on the temperature is accurate enough, fixing the solder ball in the external environment through the support component 1, fixing the thermometer near the solder ball, after 278s, shooting the temperature difference between the temperature of the solder ball position in an image obtained by the thermal imager 3 and the temperature measured by the thermometer to be close to the deduced temperature of 1.72 ℃, wherein the error does not cause substantial adverse effect on the judgment of the temperature required by livestock and poultry, belongs to an error within an allowable range, if more accurate data needs to be obtained, the heat exchanger can be placed for a long time, and therefore, the method can obtain the air temperature data in a short time and further judge the temperature distribution condition in the house.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A temperature distribution monitoring apparatus, comprising:
a plurality of heat exchange bodies;
a support assembly for supporting the heat exchange body, the heat exchange body being connected to the support assembly;
and the thermal imager is used for shooting the heat exchange body.
2. The temperature distribution monitoring device according to claim 1, the heat exchange body being a sphere.
3. The temperature distribution monitoring device according to claim 1, wherein the material of the heat exchange body is a material having a pythotic number satisfying "Bi < 0.1M", where M is a dimensionless number related to the geometry of the object.
4. The temperature distribution monitoring device of claim 1, wherein the support assembly comprises a rope, the heat exchange body is secured to the rope, and both ends of the rope are secured to an external support.
5. The temperature distribution monitoring device according to claim 4, wherein the plurality of rope bodies are engaged in parallel and located on the same horizontal plane, and the plurality of rope bodies are connected by a connecting member.
6. The apparatus according to claim 4, wherein the heat exchanger has a through hole for the rope to pass through, the rope has a first limiting member and a second limiting member, the rope is connected in series with the heat exchanger, and the heat exchanger is located between the first limiting member and the second limiting member.
7. The temperature distribution monitoring device according to claim 6, wherein the first limiting member and/or the second limiting member is a knot obtained by binding the rope body.
8. The temperature distribution monitoring device according to claim 4, wherein both ends of the rope body are provided with hooks or hanging rings for fixing an external support.
9. The temperature distribution monitoring device according to any one of claims 1 to 3, further comprising:
the timer is used for recording test time;
a response unit;
and the input end of the controller is electrically connected with the output end of the timer, and the output end of the controller is electrically connected with the timer, the input end of the response unit and the input end of the thermal imager.
10. A monitoring method of the temperature distribution monitoring apparatus according to any one of claims 1 to 8,
step 1, fixing a plurality of heat exchange bodies on positions, required to acquire temperature information, in a house through the support assembly;
step 2, placing the thermal imager at a proper machine position to enable each heat exchange body to be located in the shooting range of the thermal imager;
step 3, waiting for proper time, wherein the proper time is used for the heat exchange of the heat exchange body and the air and is more than or equal to a time constant tcWherein, tcρ cV/(hA), wherein,rho is the density of the heat exchange body, c is specific constant pressure heat capacity, V is the volume of the heat exchange body, h is the convective heat transfer coefficient of air, and A is the surface area of the heat exchange body.
And 4, step 4: and observing the image information of the thermal imager, wherein the image information is the temperature distribution condition in the greenhouse.
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Application publication date: 20210723 |