Method and device for measuring object surface temperature

Abstract

A method and device for measuring an object surface temperature is provided, the method includes: acquiring temperatures measured by the temperature sensing device at a current time and a time before the current time after a temperature sensing device conductively contacts the surface of the measured object is contacted with the surface of the measured object for a predetermined period of time (101); determining a temperature compensation factor at a current time based on the temperatures measured by the temperature sensing device at the current time and a time before the current time (102); acquiring a correction factor for the temperature compensation factor (103); acquiring a static correction factor (104); and determining a surface temperature of the measured object at a current time based on one or more of the temperature measured by the temperature sensing device at the current time, the temperature compensation factor at the current time, the correction factor for the temperature compensation factor, and the static correction factor (105). The temperature of the measured object can be accurately measured without destroying the measured object.

Description

Related Applications

[0001] This application claims priority to a Chinese patent application filed on July 27, 2021, bearing application number 202110851896.4, and entitled "Method and apparatus for measuring surface temperature of an object", the entire contents of which are incorporated herein in their entirety. [Technical field]

[0002] The present invention relates to the field of sensor measurement technology, and in particular to a method and device for measuring the surface temperature of an object. [Background technology]

[0003] Every measured object has a corresponding tolerable temperature range, and only within this range can the normal characteristics of the measured object be ensured. In many cases, the measured object itself must not be destroyed, so the temperature of the object must be reflected from the temperature of the object's surface. Even if the measured object itself can withstand various temperatures, accurate monitoring of the temperature is also very important to ensure the safety of surrounding life, the measured object, the environment, etc. When the object is subjected to a large temperature gradient, the difficulty of accurate monitoring of the temperature increases significantly. Therefore, there is an urgent need for a method for accurately measuring the surface temperature of an object, so as to ensure that the temperature of the measured object can be accurately monitored without the measured object itself being destroyed, and to prevent unnecessary harm from occurring. Summary of the Invention

[0004] An embodiment of the present invention is a method for measuring the surface temperature of an object to be measured accurately without destroying the object, comprising the steps of: obtaining temperatures measured by a temperature sensing device in conductive contact with a surface of the measured object at a current time and a time prior to the current time after the temperature sensing device is in contact with the surface of the measured object for a predetermined period of time; determining a temperature compensation factor for a current time based on temperatures measured by the temperature sensing device at a current time and a time prior to the current time; Obtaining a correction factor for the temperature compensation factor; Obtaining a static correction factor; We propose a method for measuring object surface temperature, which includes determining the surface temperature of the measured object at the current time based on one or more of a temperature measured by a temperature sensing device at the current time, a temperature compensation factor at the current time, a correction factor for the temperature compensation factor, and a static correction factor.

[0005] An embodiment of the present invention is an object surface temperature measuring device for accurately measuring the temperature of a measured object without destroying the measured object, comprising: a measurement temperature acquisition module for acquiring temperatures measured by a temperature sensing device at a current time and a time before the current time after the temperature sensing device, which is in conductive contact with a surface of the measured object, has been in contact with the surface of the measured object for a predetermined period of time; a temperature compensation factor determination module for determining a temperature compensation factor at a current time based on temperatures measured by the temperature sensing device at a current time and a time before the current time; a first correction factor obtaining module for obtaining a correction factor of the temperature compensation factor; a second correction factor acquisition module for acquiring a static correction factor; We propose an object surface temperature measuring device that includes an object surface temperature acquisition module for determining the surface temperature of the measured object at a current time based on one or more of a temperature measured by a temperature sensing device at a current time, a temperature compensation factor at the current time, a correction factor for the temperature compensation factor, and a static correction factor.

[0006] An embodiment of the present invention further proposes a computer device including a memory, a processor, and a computer program stored in the memory and executable by the processor, wherein the above-mentioned method for measuring the surface temperature of an object is realized when the computer program is executed by the processor.

[0007] An embodiment of the present invention further proposes a computer-readable storage medium having stored thereon a computer program for executing the above-mentioned method for measuring an object surface temperature.

[0008] In an embodiment of the present invention, after a temperature sensing device that is in conductive contact with the surface of a measured object is in contact with the surface of the measured object for a predetermined period of time, the temperature measured by the temperature sensing device at the current time and the time before the current time is obtained, and a temperature compensation factor at the current time is determined based on the temperature measured by the temperature sensing device at the current time and the time before the current time, a correction factor for the temperature compensation factor is obtained, and a static correction factor is obtained, and the surface temperature of the measured object at the current time is determined based on one or more of the temperature measured by the temperature sensing device at the current time, the temperature compensation factor at the current time, the correction factor for the temperature compensation factor, and the static correction factor. In the above process, the temperature compensation factor at the current time is first determined, and the correction factor for the temperature compensation factor and the static correction factor are used to realize the calibration adjustment for the measurement of the object surface temperature through multiple corrections, and the accuracy of ±3°C can be ensured even if the temperature gradient is large. [Brief description of the drawings]

[0009] The drawings described herein are intended to provide a further understanding of the invention and constitute a part of this application, but are not intended to be limiting of the invention. [Figure 1] 2 is a flowchart of a method for measuring an object surface temperature in an embodiment of the present invention. [Diagram 2] FIG. 2 is a diagram illustrating the principle of temperature measurement in an embodiment of the present invention. [Diagram 3] 1 is a schematic diagram of an object surface temperature measuring device according to an embodiment of the present invention. [Figure 4] FIG. 2 is a schematic diagram of a computer device according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] In order to make the objectives, technical solutions and advantages of the embodiments of the present invention clearer and easier to understand, the embodiments of the present invention will be described in more detail below with reference to the drawings, in which the schematic embodiments of the present invention and the description thereof are provided for the purpose of interpreting the present invention, but are not intended to limit the present invention.

[0011] FIG. 1 is a flow chart of a method for measuring an object surface temperature in an embodiment of the present invention. As shown in FIG. 1, the method includes the following steps:

[0012] Step 101: After a temperature sensing device that is in conductive contact with the surface of the measured object is in contact with the surface of the measured object for a predetermined period of time, the temperature measured by the temperature sensing device at the current time and the time before the current time is obtained.

[0013] Step 102: Determine a temperature compensation factor for the current time based on the temperatures measured by the temperature sensing device at the current time and a time before the current time.

[0014] Step 103: Obtain a correction factor for the temperature compensation factor.

[0015] Step 104: Obtain a static correction factor.

[0016] Step 105: Determine the surface temperature of the measured object at the current time based on one or more of the temperature measured by the temperature sensing device at the current time, a temperature compensation factor at the current time, a correction factor for the temperature compensation factor, and a static correction factor.

[0017] In an embodiment of the present invention, a temperature compensation factor for the current time is first determined, and then a correction factor for the temperature compensation factor and a static correction factor are used to perform multiple corrections to achieve calibration adjustment for the measurement of the object surface temperature, and an accuracy of ±3°C can be ensured even when the temperature gradient becomes large.

[0018] In step 101, after the temperature sensing device is in contact with the surface of the measured object for a predetermined period of time, the temperature measured by the temperature sensing device at the current time and the time before the current time is obtained, the measured object is simultaneously placed in a closed space together with the temperature sensing device, and the temperature sensing device is in full contact with the surface of the measured object, where the measured object and the temperature sensing device are surrounded by a narrow closed space to form a creative temperature measurement chamber, which is the first prerequisite for temperature measurement.

[0019] The second prerequisite for temperature measurement is that the temperature sensing device must be in full contact with the surface of the object to be measured and the contact surface must not change, and the larger the contact area between the temperature sensing device and the object to be measured, the better. Figure 2 shows the principle of temperature measurement in an embodiment of the present invention, and the surface area of ​​the temperature sensing device is smaller than that of the object to be measured, so that the surface area of ​​the temperature sensing device can be fully utilized for calculation, and the temperature sensing device is a relatively regular rectangular parallelepiped, and its volume is relatively easy to calculate. Usually, the temperature sensing device needs to be fixed with a bracket to prevent the movement of the temperature sensing device from affecting the measurement accuracy.

[0020] The third prerequisite for temperature measurement is that the housing of the temperature sensing device has good thermal conductivity performance to ensure that the temperature rise of the object within a certain period of time can be completely transmitted to the temperature sensing device.

[0021] In one embodiment, the ADC (Analog Digital Converter) acquisition accuracy of the temperature sensing device is at least 8 bits, which is also the fourth prerequisite for temperature measurement.

[0022] In one embodiment, determining a temperature compensation factor for the current time based on temperatures measured by the temperature sensing device at the current time and a time prior to the current time includes: determining a first factor based on one or more of a specific heat capacity of the temperature sensing device, a density of the temperature sensing device, a volume of the temperature sensing device, a distance between a center of the temperature sensing device and a surface of the measured object, and a contact area between the temperature sensing device and the measured object; determining a second factor based on one or more of the first factor and the thermal transfer coefficient; and determining a temperature compensation factor for the current time based on one or more of a second factor, a temperature measured by the temperature sensing device at the current time, a temperature measured by the temperature sensing device at a time prior to the current time, and a time interval between the current time and a time prior to the current time.

[0023] When the measurement of the temperature sensing device is in a static state, the temperature compensation factor can be considered to be approximately equal to 0, so a static correction factor can be introduced, which can be obtained through a large amount of simulation experiments to further correct the temperature measured by the temperature sensing device and further improve the accuracy of the object surface temperature, thereby ensuring an accuracy of ±3°C even when the temperature gradient is large.

[0024] In one embodiment, the method further comprises: Obtaining a correction factor of a medium when a medium is present between the measured object and the temperature sensing device, the medium being conductively in contact with the surfaces of the measured object and the temperature sensing device, respectively; and determining a surface temperature of the measured object at the current time based on one or more of the temperature measured by the temperature sensing device at the current time, a temperature compensation factor at the current time, a correction factor for the temperature compensation factor, a static correction factor, and a medium correction factor.

[0025] The above embodiment relates to another measurement method in which a medium exists, and in this case, it is necessary to ensure that the intermediate medium has a good thermal conductivity coefficient so as to ensure the temperature conduction speed and insulation performance.

[0026] The medium correction factor is also determined through a large amount of simulation experiments. By introducing the medium correction factor, the measurement error caused by the presence of the medium can be corrected, and the accuracy of the surface temperature of the measured object can be further improved.

[0027] As described above, in the method according to the embodiment of the present invention, after the temperature sensing device conductively contacts the surface of the measured object for a predetermined time, obtains the temperatures measured by the temperature sensing device at the current time and the time before the current time, and determines the temperature compensation factor at the current time based on the temperatures measured by the temperature sensing device at the current time and the time before the current time, obtains a correction factor for the temperature compensation factor, and obtains a static correction factor, and determines the surface temperature of the measured object at the current time based on one or more of the temperature measured by the temperature sensing device at the current time, the temperature compensation factor at the current time, the correction factor for the temperature compensation factor, and the static correction factor. In the above process, the temperature compensation factor at the current time is first determined, and the correction factor for the temperature compensation factor and the static correction factor are used to realize the calibration adjustment for the measurement of the object surface temperature through multiple corrections, and the accuracy of ±3°C can be ensured even if the temperature gradient is large.

[0028] The embodiment of the present invention further proposes an object surface temperature measuring device, the principle of which is similar to the object surface temperature measuring method, and will not be further repeated here.

[0029] FIG. 3 is a schematic diagram of an object surface temperature measuring device according to an embodiment of the present invention. As shown in FIG. a measurement temperature acquisition module 301 for acquiring temperatures measured by a temperature sensing device at a current time and a time before the current time after the temperature sensing device, which is in conductive contact with a surface of the measured object, is in contact with the surface of the measured object for a predetermined period of time; a temperature compensation factor determination module 302 for determining a temperature compensation factor at a current time based on temperatures measured by the temperature sensing device at a current time and a time before the current time; a first correction factor obtaining module 303 for obtaining a correction factor of the temperature compensation factor; a second correction factor obtaining module 304 for obtaining a static correction factor; and an object surface temperature acquisition module 305 for determining a surface temperature of the measured object at a current time based on one or more of a temperature measured by the temperature sensing device at a current time, a temperature compensation factor at a current time, a correction factor for the temperature compensation factor, and a static correction factor.

[0030] In one embodiment, the temperature compensation factor determination module specifically comprises: determining a first factor based on one or more of a specific heat capacity of the temperature sensing device, a density of the temperature sensing device, a volume of the temperature sensing device, a distance between a center of the temperature sensing device and a surface of the measured object, and a contact area between the temperature sensing device and the measured object; determining a second factor based on one or more of the first factor and the thermal transfer coefficient; The second factor is used to determine a temperature compensation factor for the current time based on one or more of the temperature measured by the temperature sensing device at the current time, the temperature measured by the temperature sensing device at a time prior to the current time, and the time interval between the current time and the time prior to the current time.

[0031] In one embodiment, the device comprises: Further comprising a third correction factor acquisition module 306 for acquiring a correction factor of a medium when a medium exists between the measured object and the temperature sensing device, the medium being conductively in contact with the surfaces of the measured object and the temperature sensing device, respectively; The object surface temperature acquisition module 305 is further used to determine the surface temperature of the measured object at the current time based on one or more of the temperature measured by the temperature sensing device at the current time, a temperature compensation factor at the current time, a correction factor for the temperature compensation factor, a static correction factor, and a medium correction factor.

[0032] In one embodiment, the ADC acquisition precision of the temperature sensing device is at least 8 bits.

[0033] As described above, in the device according to the embodiment of the present invention, after the temperature sensing device conductively contacts the surface of the measured object for a predetermined time, the temperature measured by the temperature sensing device at the current time and the time before the current time is obtained, and the temperature compensation factor at the current time is determined based on the temperature measured by the temperature sensing device at the current time and the time before the current time, a correction factor for the temperature compensation factor is obtained, and a static correction factor is obtained, and the surface temperature of the measured object at the current time is determined based on one or more of the temperature measured by the temperature sensing device at the current time, the temperature compensation factor at the current time, the correction factor for the temperature compensation factor, and the static correction factor. In the above process, the temperature compensation factor at the current time is first determined, and the correction factor for the temperature compensation factor and the static correction factor are used to realize the calibration adjustment for the measurement of the object surface temperature through multiple corrections, and the accuracy of ±3°C can be ensured even if the temperature gradient is large.

[0034] The embodiment of the present application further provides a computer device. FIG. 4 is a schematic diagram of a computer device in the embodiment of the present invention, which can realize all steps of the method for measuring the surface temperature of an object in the above embodiment. The computer device specifically includes a processor 401, a memory 402, a communications interface 403, and a communications bus 404; Wherein, the processor 401, the memory 402 and the communication interface 403 communicate with each other via the communication bus 404, and the communication interface 403 is used to realize information transmission between related devices such as a server device, a detection device and a user device; The processor 401 is used to call the computer program in the memory 402, and when the computer program is executed by the processor, all the steps of the method for measuring the object surface temperature in the above embodiment are realized.

[0035] An embodiment of the present application further provides a computer-readable storage medium capable of realizing all the steps of the method for measuring the surface temperature of an object in the above embodiment, wherein a computer program is stored in the computer-readable storage medium, and when the computer program is executed by a processor, all the steps of the method for measuring the surface temperature of an object in the above embodiment are realized.

[0036] It will be apparent to those skilled in the art that the present invention may be implemented as a method, a system, or a computer program product. Thus, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware. The present invention may also take the form of a computer program product embodied in one or more computer usable storage media (including, but not limited to, magnetic disk memories, CD-ROMs, optical memories, etc.) that contain computer usable program code.

[0037] The present invention has been described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to the embodiments of the present invention. It should be understood that each flow and / or each block in the flowcharts and / or block diagrams, and combinations of flows and / or blocks in the flowcharts and / or block diagrams, can be realized by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, a special purpose computer, an embedded processor, or other programmable data processing device to create a machine, such that the instructions executed by the processor of the computer or other programmable data processing device create an apparatus for implementing the functions specified in one or more flows of the flowcharts and / or one or more blocks of the block diagrams.

[0038] These computer program instructions may be stored in a computer-readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, thereby creating an article of manufacture that includes a command apparatus that implements the functions specified in one or more flows of the flowcharts and / or one or more blocks of the block diagrams according to the instructions stored in the computer-readable memory.

[0039] These computer program instructions may be loaded into a computer or other programmable data processing device and cause the computer or other programmable device to execute a series of operations and steps to generate a computer-implemented process, such that the instructions executed on the computer or other programmable device provide steps for implementing the functions specified in one or more flows of the flowcharts and / or one or more blocks of the block diagrams.

[0040] The specific embodiments described above have further explained the objectives, technical solutions and beneficial effects of the present invention in detail, but the above description is merely a specific embodiment of the present invention and does not limit the protection scope of the present invention. It should be understood that any modifications, equivalent replacements, improvements, etc. made within the technical spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for measuring a surface temperature of an object, comprising the steps of: obtaining temperatures measured by a temperature sensing device in conductive contact with a surface of the measured object at a current time and a time prior to the current time after the temperature sensing device is in contact with the surface of the measured object for a predetermined period of time; determining a temperature compensation factor for a current time based on temperatures measured by the temperature sensing device at a current time and a time prior to the current time; Obtaining a correction factor for the temperature compensation factor; Obtaining a static correction factor; determining a surface temperature of the measured object at a current time based on one or more of a temperature measured by the temperature sensing device at a current time, a temperature compensation factor at the current time, a correction factor for the temperature compensation factor, and a static correction factor; A method for measuring an object surface temperature, comprising:

2. Determining a temperature compensation factor for a current time based on temperatures measured by the temperature sensing device at a current time and a time prior to the current time, determining a first factor based on one or more of a specific heat capacity of the temperature sensing device, a density of the temperature sensing device, a volume of the temperature sensing device, a distance between a center of the temperature sensing device and a surface of the measured object, and a contact area between the temperature sensing device and the measured object; determining a second factor based on one or more of the first factor and the thermal transfer coefficient; The method for measuring the surface temperature of an object as described in claim 1, further comprising determining a temperature compensation factor for the current time based on one or more of a second factor, a temperature measured by the temperature sensing device at the current time, a temperature measured by the temperature sensing device at a time prior to the current time, and a time interval between the current time and a time prior to the current time.

3. Obtaining a correction factor of a medium when a medium is present between the measured object and the temperature sensing device, the medium being conductively in contact with the surfaces of the measured object and the temperature sensing device, respectively; The method for measuring the surface temperature of an object as described in claim 1, further comprising determining a surface temperature of the measured object at a current time based on one or more of a temperature measured by the temperature sensing device at a current time, a temperature compensation factor at a current time, a correction factor for the temperature compensation factor, a static correction factor, and a correction factor for a medium.

4. The method for measuring the surface temperature of an object according to claim 1, wherein the ADC acquisition precision of the temperature sensing device is at least 8 bits.

5. An apparatus for measuring a surface temperature of an object, comprising: a measurement temperature acquisition module for acquiring temperatures measured by the temperature sensing device at a current time and a time before the current time after the temperature sensing device, which is in conductive contact with the surface of the measured object, has been in contact with the surface of the measured object for a predetermined period of time; a temperature compensation factor determination module for determining a temperature compensation factor at a current time based on temperatures measured by the temperature sensing device at a current time and a time before the current time; a first correction factor obtaining module for obtaining a correction factor of a temperature compensation factor; a second correction factor obtaining module for obtaining a static correction factor; an object surface temperature acquisition module for determining a surface temperature of the measured object at a current time based on one or more of a temperature measured by the temperature sensing device at a current time, a temperature compensation factor at the current time, a correction factor for the temperature compensation factor, and a static correction factor; 1. An object surface temperature measuring device comprising:

6. The temperature compensation factor determination module includes: determining a first factor based on one or more of a specific heat capacity of the temperature sensing device, a density of the temperature sensing device, a volume of the temperature sensing device, a distance between a center of the temperature sensing device and a surface of the measured object, and a contact area between the temperature sensing device and the measured object; determining a second factor based on one or more of the first factor and the thermal transfer coefficient; The object surface temperature measuring device of claim 5, further comprising: a temperature compensation factor for the current time based on one or more of a second factor, a temperature measured by the temperature sensing device at the current time, a temperature measured by the temperature sensing device at a time prior to the current time, and a time interval between the current time and a time prior to the current time.

7. When a medium is present between the measured object and the temperature sensing device, the medium is conductively in contact with the surfaces of the measured object and the temperature sensing device, respectively. A third correction factor acquisition module is further included for acquiring a correction factor of the medium; The object surface temperature measuring device of claim 5, characterized in that the object surface temperature acquisition module further determines the surface temperature of the measured object at the current time based on one or more of the temperature measured by the temperature sensing device at the current time, a temperature compensation factor at the current time, a correction factor for the temperature compensation factor, a static correction factor, and a medium correction factor.

8. The object surface temperature measuring device according to claim 5, wherein the ADC acquisition accuracy of the temperature sensing device is at least 8 bits.

9. A computing device including a memory, a processor, and a computer program stored in the memory and executable by the processor, A computer apparatus, characterized in that, when the computer program is executed by the processor, the method according to any one of claims 1 to 4 is implemented.

10. A computer-readable storage medium having stored thereon a computer program for executing the method according to any one of claims 1 to 4.

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