CN110987225B - Method and device for monitoring wall surface temperature of solar heat absorber and electronic equipment - Google Patents
Method and device for monitoring wall surface temperature of solar heat absorber and electronic equipment Download PDFInfo
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- CN110987225B CN110987225B CN201911234344.8A CN201911234344A CN110987225B CN 110987225 B CN110987225 B CN 110987225B CN 201911234344 A CN201911234344 A CN 201911234344A CN 110987225 B CN110987225 B CN 110987225B
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- G01K11/00—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00
- G01K11/22—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using measurement of acoustic effects
- G01K11/24—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using measurement of acoustic effects of the velocity of propagation of sound
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Abstract
The invention discloses a method and a device for monitoring the wall surface temperature of a solar heat absorber and electronic equipment, wherein the method comprises the following steps: acquiring the sound wave propagation time in a preset area of the pipe wall surface at the inner side of the solar heat absorber; measuring a distance traveled by the acoustic wave; calculating the sound wave propagation speed of the sound wave in a preset area according to the sound wave propagation time and the distance; and calculating the temperature of the preset area according to the material type of the inner pipe of the solar heat absorber and the sound wave propagation speed. According to the embodiment of the invention, the temperature is measured by utilizing the sound waves, the temperature of the path region of the sound waves is calculated through the speed of the sound waves propagating in the wall surface of the inner side pipe of the solar heat absorber and the type of the material of the inner side pipe of the solar heat absorber, and the propagation path of the sound waves covers the preset region, so that the temperature measurement is more accurate.
Description
Technical Field
The invention relates to the technical field of solar heat absorbers, in particular to a method and a device for monitoring the wall surface temperature of a solar heat absorber and electronic equipment.
Background
The heat storage type solar energy can be used for power grid peak regulation due to stable operation of the photo-thermal power generation technology, can promote the coordinated development of renewable energy sources, optimizes the energy-saving structure and has important significance for realizing the aims of energy conservation and emission reduction.
The tower type solar thermal power generation system taking molten salt as a working medium for heat absorption, heat storage and heat transfer is one of mainstream of the current photo-thermal power generation technology, the molten salt heat absorber is an important part for photo-thermal conversion, and the stability and the reliability of the operation of the tower type solar thermal power generation system have decisive influence on the tower type photo-thermal power generation. In order to ensure the safe operation of the heat absorber and the normal operation parameters of the heat absorber, the temperature of the panel of the heat absorber needs to be monitored in the preheating, normal operation and evacuation modes of the heat absorber. However, the current method for measuring the wall surface of the heat absorber is monitored by devices such as a thermocouple, an infrared camera and the like. However, the thermocouple can accurately measure the temperature at the end point, and the temperature field distribution in a certain area of the heat absorber tube panel cannot be obtained. The infrared camera can monitor several tube panels of the heat absorber at the same time, but the accuracy is deviated and the problem of data delay exists.
Disclosure of Invention
The embodiment of the invention provides a method and a device for monitoring the wall surface temperature of a solar heat absorber and electronic equipment, and aims to solve the problem that the temperature field distribution in a certain area of a tube panel of the heat absorber cannot be accurately determined.
In order to solve the technical problem, the invention is realized as follows:
in a first aspect, a method for monitoring the wall temperature of a solar heat absorber is provided, where the method includes:
acquiring the sound wave propagation time in a preset area of the pipe wall surface at the inner side of the solar heat absorber;
measuring a distance traveled by the acoustic wave;
calculating the sound wave propagation speed of the sound wave in a preset area according to the sound wave propagation time and the distance;
and calculating the temperature of the preset area according to the material type of the inner pipe of the solar heat absorber and the sound wave propagation speed.
Further, it is long to acquire the sound wave propagation in the inboard pipe wall face preset area of solar heat absorber, include:
acquiring sound waves emitted by a loudspeaker matched with a sound wave receiver through the sound wave receiver arranged in a preset area of the wall surface of the inner side of the solar heat absorber;
filtering the sound wave to obtain a filtered sound wave;
and determining the propagation time of the sound wave in the preset area by adopting a cross-correlation method.
Furthermore, the number of the loudspeakers and the number of the sound wave receivers are equal; the number of the loudspeakers and the number of the sound wave receivers are both integers which are more than or equal to 1; each pair of the loudspeaker and the sound wave receiver are oppositely arranged at the top or the bottom of the preset area respectively.
Further, the calculating the temperature of the preset area according to the material type of the inner pipe of the solar heat absorber and the sound wave propagation speed includes:
determining the relation between material parameters and temperature according to the material type of the inner pipe of the solar heat absorber;
determining the relation between material parameters and the sound wave propagation speed according to the material type of the inner pipe of the solar heat absorber;
and calculating the temperature of the preset area according to the relationship between the material parameters and the temperature and the relationship between the material parameters and the sound wave propagation speed.
Further, the temperature T of the preset area is calculated according to the following formula:
ρ＝ρ-0/(1+α×(T-T-0))
E＝aT+b
ν＝pT+q
wherein c is the sound wave propagation speed; e is the elastic modulus of the material; rho is the material density; ν is the poisson ratio; t is-0Is a reference temperature; rho-0Is the material density at a reference temperature; alpha is an expansion coefficient; a. and b, p and q are material parameter coefficients which are constants.
In a second aspect, an apparatus for monitoring the wall temperature of a solar heat absorber is provided, the apparatus comprising:
the acquisition module is used for acquiring the sound wave propagation time in a preset area of the wall surface of the inner side of the solar heat absorber;
the measuring module is used for measuring the distance of the sound wave propagation;
the speed calculation module is used for calculating the sound wave propagation speed of the sound wave in a preset area according to the sound wave propagation time and the distance;
and the temperature calculation module is used for calculating the temperature of the preset area according to the material type of the inner pipe of the solar heat absorber and the sound wave propagation speed.
Further, the obtaining module comprises:
the acquisition submodule is used for acquiring sound waves emitted by a loudspeaker matched with a sound wave receiver through the sound wave receiver arranged in a preset area of the wall surface of the inner side of the solar heat absorber;
the filtering submodule is used for filtering the sound waves to obtain filtered sound waves;
and the first determining submodule is used for determining the sound wave propagation time in the preset area by adopting a cross-correlation method.
Further, the temperature calculation module includes:
the second determining submodule is used for determining the relation between material parameters and temperature according to the material type of the inner measuring tube of the solar heat absorber;
the third determining submodule is used for determining the relation between material parameters and the sound wave propagation speed according to the material type of the inner side pipe of the solar heat absorber;
and the calculation submodule is used for calculating the temperature of the preset area according to the relationship between the material parameters and the temperature and the relationship between the material parameters and the sound wave propagation speed.
In a third aspect, an electronic device is provided, which includes a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory complete communication with each other through the communication bus;
a memory for storing a computer program;
a processor for implementing the steps of the method according to the first aspect when executing a program stored in the memory.
In a fourth aspect, a computer-readable storage medium is provided, on which a computer program is stored, which computer program, when being executed by a processor, realizes the steps of the method according to the first aspect.
In the embodiment of the invention, firstly, the sound wave propagation time length in the preset area of the pipe wall surface of the inner side of the solar heat absorber is obtained, then the sound wave propagation distance is measured, then the sound wave propagation speed in the preset area is calculated according to the sound wave propagation time length and the distance, and finally the temperature in the preset area is calculated according to the material type and the sound wave propagation speed of the pipe of the inner side of the solar heat absorber. According to the embodiment of the invention, the temperature is measured by utilizing the sound waves, the temperature of the path region of the sound waves is calculated through the speed of the sound waves propagating in the wall surface of the inner side pipe of the solar heat absorber and the type of the material of the inner side pipe of the solar heat absorber, and the propagation path of the sound waves covers the preset region, so that the temperature measurement is more accurate.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a flowchart of a method for monitoring a wall temperature of a solar heat absorber according to an embodiment of the present invention;
fig. 2 is a flowchart of a method for obtaining a sound wave propagation duration in a preset region of a pipe wall surface on an inner side of a solar heat absorber according to an embodiment of the present invention;
fig. 3 is a schematic structural view of a solar thermal absorber provided by an embodiment of the present invention;
FIG. 4 is a flowchart of a method for calculating a temperature of a predetermined area according to an embodiment of the present invention;
fig. 5 is a schematic view of a solar heat absorber according to an embodiment of the present invention, with a wall thereof expanded;
fig. 6 is a schematic structural diagram of a device for monitoring the wall temperature of a solar heat absorber according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. 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.
The embodiment of the invention provides a method for monitoring the wall temperature of a solar heat absorber.
Fig. 1 is a flowchart of a method for monitoring a wall temperature of a solar heat absorber according to an embodiment of the present application.
In step S101, a sound wave propagation time in a preset region of the inner wall surface of the solar heat absorber is obtained.
In the embodiment of the application, the sound wave propagation time can be obtained by the speaker and the sound wave receiver which are respectively arranged in the preset area of the wall surface of the inner side of the solar heat absorber and are matched with each other.
The loudspeaker and the sound wave receiver are respectively arranged at the top or the bottom of the preset area. The preset area refers to a certain designated area of the wall surface of the pipe on the inner side of the solar heat absorber. For example, the wall surface of the inner pipe of the solar heat absorber is divided into a plurality of regions in the axial direction, and any one or more of the regions may be a predetermined region.
Furthermore, the number of the loudspeakers and the number of the sound wave receivers in the preset area are the same, and the loudspeakers and the sound wave receivers are respectively and correspondingly arranged at the top or the bottom of the preset area. For example, a speaker is disposed at the top of the predetermined area, and a sound receiver is disposed at the bottom of the predetermined area. Or, a loudspeaker and a sound wave receiver are arranged at the top of the preset area, and a sound wave receiver and a loudspeaker are arranged at the bottom corresponding to the preset area.
In step S102, the distance traveled by the acoustic wave is measured.
In the embodiment of the present application, if a pair of speakers and a sound wave receiver are included in the predetermined region, the distance between the speakers and the sound wave receiver is measured. If the preset area contains a plurality of pairs of loudspeakers and sound wave receivers, the distances between the loudspeakers and the sound wave receivers are measured respectively, and then the average value of the measured distances is taken as the distance.
In step S103, a sound wave propagation speed of the sound wave in a preset region is calculated according to the sound wave propagation time and the distance.
In the embodiment of the present application, the sound wave propagation speed of the sound wave in the preset area is calculated according to the determined sound wave propagation time and the measured distance.
In step S104, the temperature of the preset region is calculated according to the material type of the inner pipe of the solar heat absorber and the sound wave propagation speed.
In the embodiment of the application, the propagation speed of the sound wave in the material is related to the elastic modulus, the poisson ratio and the density of the material, and the elastic modulus, the poisson ratio and the density of the material are related to the temperature. Therefore, the sound wave propagation speed of the sound wave in the preset area is calculated according to the material type of the inner pipe of the solar heat absorber and the determined sound wave propagation speed.
According to the method and the device, firstly, the sound wave propagation time length in the preset area of the inner side pipe wall surface of the solar heat absorber is obtained, then the sound wave propagation distance is measured, then the sound wave propagation speed in the preset area is calculated according to the sound wave propagation time length and the distance, and finally the temperature of the preset area is calculated according to the material type and the sound wave propagation speed of the inner side pipe of the solar heat absorber. According to the embodiment of the invention, the temperature is measured by utilizing the sound waves, the temperature of the path region of the sound waves is calculated through the speed of the sound waves propagating in the wall surface of the inner side pipe of the solar heat absorber and the type of the material of the inner side pipe of the solar heat absorber, and the propagation path of the sound waves covers the preset region, so that the temperature measurement is more accurate.
In a possible embodiment of the present application, as shown in fig. 2, obtaining the sound wave propagation time in a preset region of a pipe wall surface inside a solar heat absorber specifically includes:
in step S201, sound waves emitted from a speaker cooperating with a sound wave receiver are obtained by the sound wave receiver disposed in a preset region of the inner wall surface of the solar heat absorber.
In the embodiment of the application, the sound waves emitted by the loudspeaker are acquired by the sound wave receiver which is matched with the sound wave receiver.
In step S202, the sound wave is filtered to obtain a filtered sound wave.
In the embodiment of the present application, in order to improve the signal-to-noise ratio, the sound wave emitted by the speaker is filtered to obtain a filtered sound wave.
In step S203, the sound wave propagation time in the preset region is determined by using a cross-correlation method.
In the embodiment of the application, the sound wave signal after being filtered is measured, so that the measured sound wave propagation time is more accurate, and the sound wave propagation time in the preset area is further determined by adopting a cross-correlation method, so that the finally measured temperature of the wall surface of the pipe at the inner side of the solar heat absorber is more accurate.
In one possible implementation manner of the present application, as shown in fig. 3, a schematic structural diagram of a solar heat absorber provided in an embodiment of the present application is shown.
Wherein, the number of the loudspeakers and the sound wave receivers is equal. The number of the loudspeakers and the number of the sound wave receivers are both integers which are more than or equal to 1. As shown in fig. 3, each pair of speaker and acoustic receiver is disposed on the top or bottom of the heat absorber tube panel (i.e., the predetermined area), respectively.
In a possible embodiment of the present application, as shown in fig. 4, the calculating the temperature of the preset region according to the material of the inner pipe of the solar thermal absorber and the propagation speed of the acoustic wave specifically includes:
in step S401, a relation between a material parameter and a temperature is determined according to a material type of the inner tube of the solar heat absorber.
In the embodiment of the application, the elastic modulus, the poisson ratio and the material density of the material are all related to the temperature of the wall surface of the inner pipe of the solar heat absorber. The specific relationship is shown as follows:
ρ＝ρ-0/(1+α×(T-T-0))
E＝aT+b
ν＝pT+q
wherein E is the elastic modulus of the material; rho is the material density; ν is the poisson ratio; t is-0Is a reference temperature; rho-0Is the material density at a reference temperature; alpha is an expansion coefficient; a. and b, p and q are material parameter coefficients which are constants.
Specifically, an outer tube type heat absorber made of nickel-based alloy 625 is taken as an example.
Reference temperature T-0At 22 ℃ ρ-08440 kg/m.
In step S402, a relation between a material parameter and a propagation speed of an acoustic wave is determined according to a material type of the inner pipe of the solar heat absorber.
In the embodiment of the present application, the propagation speed of the acoustic wave in the material is related to the elastic modulus, poisson's ratio and density of the material. The specific relationship is shown as follows:
wherein c is the sound wave propagation speed; e is the elastic modulus of the material; rho is the material density; ν is the poisson ratio.
In step S403, the temperature of the preset region is calculated according to the relationship between the material parameter and the temperature and the relationship between the material parameter and the propagation speed of the acoustic wave.
In the embodiment of the present application, the temperature of the wall surface of the inner tube of the solar heat absorber can be determined according to the relationship between the material parameter and the temperature determined in steps S401 and S402 and the relationship between the propagation speed of the acoustic wave.
In one possible implementation manner of the present application, as shown in fig. 5, a schematic wall-expanded view of a solar heat absorber provided in an example of the present application is shown.
The solar heat absorber is assumed to be composed of 16 heat absorber tube panels, and n patch type loudspeakers and n sound wave receivers can be sequentially distributed on the upper end and the lower end of the tube wall of the tube on the inner side of the heat absorber in a surrounding mode. In the embodiment of the application, a group of loudspeakers and an acoustic wave receiver are respectively arranged at the upper end and the lower end of each tube panel of the tube wall surface on the inner side of the heat absorber. 1-16, 1 ' -16 ' respectively comprise a loudspeaker and a sound wave receiver, 17 is a heat absorber tube panel, 18 is a heat absorber, 19 ' are data collectors, 20 is a filter device, and 21 is a data output display device. 1-16 and 1 '-16' speakers sound, 1 '-16' and 1-16 'sound wave receivers receive sound signals and collect the sound signals to data collectors 19 and 19', signal-to-noise ratio is improved through a filter device 20, and the time of flight on each sound wave path is obtained through a cross-correlation method to obtain the average temperature on each tube panel, so that the temperature of the inner side tube wall of the whole heat absorber is obtained and output in a data display device.
In the embodiment of the application, the working time of the loudspeaker and the sound wave receiver on the heat absorber tube panel is set, so that the received sound wave data are more accurate, and the finally determined temperature of the wall surface of the inner tube of the solar heat absorber is more accurate.
The embodiment of the invention also provides a device for monitoring the wall surface temperature of the solar heat absorber, which is shown in fig. 6 and is a schematic structural diagram of the device for monitoring the wall surface temperature of the solar heat absorber provided by the embodiment of the application.
In this application embodiment, the monitoring device of solar heat absorber wall temperature can include: an acquisition module 101, a measurement module 102, a speed calculation module 103, and a temperature calculation module 104.
The obtaining module 101 is configured to obtain a sound wave propagation duration in a preset area of a pipe wall surface inside the solar heat absorber.
A measuring module 102, configured to measure a distance traveled by the acoustic wave.
And the speed calculation module 103 is configured to calculate a sound wave propagation speed of the sound wave in a preset area according to the sound wave propagation time and the distance.
And the temperature calculation module 104 is configured to calculate the temperature of the preset region according to the material type of the inner pipe of the solar heat absorber and the sound wave propagation speed.
Optionally, the obtaining module 101 specifically includes: the device comprises an acquisition submodule, a filtering submodule and a first determination submodule.
And the acquisition submodule is used for acquiring sound waves emitted by a loudspeaker matched with the sound wave receiver through the sound wave receiver arranged in the preset area of the inner side pipe wall surface of the solar heat absorber.
And the filtering submodule is used for filtering the sound wave to obtain the filtered sound wave.
And the first determining submodule is used for determining the sound wave propagation time in the preset area by adopting a cross-correlation method.
Optionally, the temperature calculation module 104 specifically includes: a second determination submodule, a third determination submodule and a calculation submodule.
And the second determining submodule is used for determining the relation between the material parameter and the temperature according to the material type of the inner measuring tube of the solar heat absorber.
And the third determining submodule is used for determining the relation between the material parameter and the sound wave propagation speed according to the material type of the inner side pipe of the solar heat absorber.
And the calculation submodule is used for calculating the temperature of the preset area according to the relationship between the material parameters and the temperature and the relationship between the material parameters and the sound wave propagation speed.
The functions of the apparatus described in this application have already been described in detail in the method embodiments shown in fig. 1 to 5, so that reference may be made to the related descriptions in the foregoing embodiments for details that are not described in this embodiment, and further description is not repeated here.
In another embodiment of the present application, an electronic device is further provided, as shown in fig. 7, including a processor 501, a communication interface 502, a memory 503, and a communication bus 504, where the processor 501, the communication interface 502, and the memory 503 complete communication with each other through the communication bus 504;
a memory 503 for storing a computer program;
the processor 501, when executing the program stored in the memory 503, implements the following steps: acquiring the sound wave propagation time in a preset area of the pipe wall surface at the inner side of the solar heat absorber; measuring a distance traveled by the acoustic wave; calculating the sound wave propagation speed of the sound wave in a preset area according to the sound wave propagation time and the distance; and calculating the temperature of the preset area according to the material type of the inner pipe of the solar heat absorber and the sound wave propagation speed.
According to the method and the device, firstly, the sound wave propagation time length in the preset area of the inner side pipe wall surface of the solar heat absorber is obtained, then the sound wave propagation distance is measured, then the sound wave propagation speed in the preset area is calculated according to the sound wave propagation time length and the distance, and finally the temperature of the preset area is calculated according to the material type and the sound wave propagation speed of the inner side pipe of the solar heat absorber. According to the embodiment of the invention, the temperature is measured by utilizing the sound waves, the temperature of the path region of the sound waves is calculated through the speed of the sound waves propagating in the wall surface of the inner side pipe of the solar heat absorber and the type of the material of the inner side pipe of the solar heat absorber, and the propagation path of the sound waves covers the preset region, so that the temperature measurement is more accurate.
The communication bus 504 mentioned above for the electronic device may be a Peripheral Component Interconnect (PCI) bus, an Extended Industry Standard Architecture (EISA) bus, or the like. The communication bus 504 may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown in FIG. 7, but this is not intended to represent only one bus or type of bus.
The communication interface 502 is used for communication between the above-described electronic apparatus and other apparatuses.
The Memory 503 may include a Random Access Memory (RAM) or a non-volatile Memory (non-volatile Memory), such as at least one disk Memory. Optionally, the memory may also be at least one memory device located remotely from the processor.
The Processor 501 may be a general-purpose Processor, and includes a Central Processing Unit (CPU), a Network Processor (NP), and the like; the Integrated Circuit may also be a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, a discrete Gate or transistor logic device, or a discrete hardware component.
In another embodiment of the present application, a computer-readable storage medium is further provided, where a program for monitoring the wall temperature of the solar thermal absorber is stored, and when executed by a processor, the program for monitoring the wall temperature of the solar thermal absorber implements any of the steps of the method for monitoring the wall temperature of the solar thermal absorber.
When the embodiment of the invention is specifically implemented, reference can be made to the above embodiments, and corresponding technical effects are achieved.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.
While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (7)
1. A method for monitoring the wall surface temperature of a solar heat absorber is characterized by comprising the following steps:
acquiring the sound wave propagation time in a preset area of the pipe wall surface at the inner side of the solar heat absorber;
measuring a distance traveled by the acoustic wave;
calculating the sound wave propagation speed of the sound wave in a preset area according to the sound wave propagation time and the distance;
calculating the temperature of the preset area according to the material type of an inner pipe of the solar heat absorber and the sound wave propagation speed, wherein the material type comprises: the modulus of elasticity, the density and the poisson's ratio of the material;
wherein, it is long to acquire the sound wave propagation in the inboard pipe wall face preset area of solar heat absorber, include:
acquiring sound waves emitted by a loudspeaker matched with a sound wave receiver through the sound wave receiver arranged in a preset area of the wall surface of the inner side of the solar heat absorber;
filtering the sound wave to obtain a filtered sound wave;
determining the sound wave propagation time in a preset area by adopting a cross-correlation method;
the number of the loudspeakers and the number of the sound wave receivers are equal; the number of the loudspeakers and the number of the sound wave receivers are both integers larger than 1; each pair of the loudspeaker and the sound wave receiver are respectively and oppositely arranged at the top or the bottom of the preset area; the top and the bottom of the preset area are provided with the loudspeaker and the sound wave receiver.
2. The method for monitoring the wall temperature of the solar heat absorber according to claim 1, wherein the calculating the temperature of the preset area according to the material type of the inner pipe of the solar heat absorber and the propagation speed of the sound wave comprises:
determining the relation between material parameters and temperature according to the material type of the inner pipe of the solar heat absorber;
determining the relation between material parameters and the sound wave propagation speed according to the material type of the inner pipe of the solar heat absorber;
and calculating the temperature of the preset area according to the relationship between the material parameters and the temperature and the relationship between the material parameters and the sound wave propagation speed.
3. The method for monitoring the wall temperature of the solar heat absorber according to claim 2, wherein the temperature T of the preset area is calculated according to the following formula:
wherein the content of the first and second substances,cis the speed of sound wave propagation; e is the elastic modulus of the material;
is the material density;
is the poisson ratio;
is a reference temperature;
is the material density at a reference temperature;
is the coefficient of expansion; a. and b, p and q are material parameter coefficients which are constants.
4. The utility model provides a monitoring devices of solar heat absorber wall temperature which characterized in that includes:
the acquisition module is used for acquiring the sound wave propagation time in a preset area of the wall surface of the inner side of the solar heat absorber;
the measuring module is used for measuring the distance of the sound wave propagation;
the speed calculation module is used for calculating the sound wave propagation speed of the sound wave in a preset area according to the sound wave propagation time and the distance;
the temperature calculation module is used for calculating the temperature of the preset area according to the material type of the inner pipe of the solar heat absorber and the sound wave propagation speed, wherein the material type comprises: the modulus of elasticity, the density and the poisson's ratio of the material;
wherein the acquisition module comprises:
the acquisition submodule is used for acquiring sound waves emitted by a loudspeaker matched with a sound wave receiver through the sound wave receiver arranged in a preset area of the wall surface of the inner side of the solar heat absorber;
the filtering submodule is used for filtering the sound waves to obtain filtered sound waves;
the first determining submodule is used for determining the sound wave propagation time in a preset area by adopting a cross-correlation method;
the number of the loudspeakers and the number of the sound wave receivers are equal; the number of the loudspeakers and the number of the sound wave receivers are both integers larger than 1; each pair of the loudspeaker and the sound wave receiver are respectively and oppositely arranged at the top or the bottom of the preset area; the top and the bottom of the preset area are provided with the loudspeaker and the sound wave receiver.
5. The apparatus for monitoring the wall temperature of the solar heat absorber according to claim 4, wherein the temperature calculating module comprises:
the second determining submodule is used for determining the relation between material parameters and temperature according to the material type of the inner side pipe of the solar heat absorber;
the third determining submodule is used for determining the relation between material parameters and the sound wave propagation speed according to the material type of the inner side pipe of the solar heat absorber;
and the calculation submodule is used for calculating the temperature of the preset area according to the relationship between the material parameters and the temperature and the relationship between the material parameters and the sound wave propagation speed.
6. An electronic device is characterized by comprising a processor, a communication interface, a memory and a communication bus, wherein the processor and the communication interface are used for realizing mutual communication by the memory through the communication bus;
a memory for storing a computer program;
a processor, configured to implement the steps of the method for monitoring the wall temperature of the solar thermal absorber according to any one of claims 1 to 3 when executing the program stored in the memory.
7. A computer-readable storage medium, characterized in that it stores thereon a computer program which, when being executed by a processor, carries out the method steps of monitoring the temperature of a solar absorber wall according to any one of claims 1 to 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911234344.8A CN110987225B (en) | 2019-12-05 | 2019-12-05 | Method and device for monitoring wall surface temperature of solar heat absorber and electronic equipment |
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| JP2003329518A (en) * | 2002-05-09 | 2003-11-19 | Kawasaki Heavy Ind Ltd | Method and apparatus for measurement of temperature on inner surface of structure |
| CN102355963B (en) * | 2009-03-17 | 2013-10-09 | 新日铁住金株式会社 | Temperature measuring method and device for continuous-casting mold copper plate |
| CN102411648A (en) * | 2011-08-04 | 2012-04-11 | 大连理工大学 | Numerical simulation method implemented in process of warm/hot forming of high-strength steel plates |
| CN105486424A (en) * | 2014-09-17 | 2016-04-13 | 南京理工大学 | Ultrasonic non-invasive measurement method for transient temperature field of inner wall of combustion chamber |
| CN105628790B (en) * | 2015-12-31 | 2018-05-22 | 中国空气动力研究与发展中心计算空气动力研究所 | A kind of inside configuration temperature field measurement method based on material property Parameters variation |
| CN107835306B (en) * | 2017-10-27 | 2021-04-16 | 努比亚技术有限公司 | Temperature detection method, terminal and computer readable storage medium |
| CN110297012B (en) * | 2019-06-24 | 2020-11-27 | 北京理工大学 | System and method for detecting diffusion dynamic deflagration temperature of combustible dust cloud cluster |
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