阅读说明：本技术 基于多色测温的装置、方法及存储介质 (Multicolor temperature measurement-based device and method and storage medium ) 是由 沈憧棐 赵高飞 陈学枝 于 2020-06-17 设计创作，主要内容包括：本发明提供了一种基于多色测温的装置、方法及存储介质,包括：至少两个像素,每个像素内包含N个测温单元；所述第一测温单元接收第一辐射能量,得到第一热辐射信息；所述第N测温单元接收第N辐射能量,得到第N热辐射信息；所述第一热辐射信息至第N热辐射信息不同；处理单元,所述处理单元根据所述第一热辐射信息至第N热辐射信息,得到特定辐射能量密度的相对比值或归一化分布数据；所述特定辐射能量密度相对比值或分布数据对应目标物体对应点的温度信息；所述像素和处理单元形成与目标物体温度有关的信息。本发明所述基于多色测温的装置使得测温结果与被测物体的辐射率无关,从而提高测温的准确性。(The invention provides a device, a method and a storage medium based on multicolor temperature measurement, comprising the following steps: at least two pixels, wherein each pixel comprises N temperature measuring units; the first temperature measuring unit receives first radiation energy to obtain first heat radiation information; the Nth temperature measuring unit receives the Nth radiation energy to obtain Nth heat radiation information; the first to nth heat radiation information are different; the processing unit is used for obtaining a relative ratio or normalized distribution data of specific radiation energy density according to the first to Nth heat radiation information; the specific radiation energy density relative ratio or the distribution data correspond to the temperature information of the corresponding point of the target object; the pixels and the processing unit form information related to the temperature of the target object. The device based on multicolor temperature measurement enables the temperature measurement result to be irrelevant to the radiance of the measured object, thereby improving the accuracy of temperature measurement.)

1. A device based on polychrome temperature measurement characterized in that includes: the pixel temperature measuring device comprises at least two pixels, wherein each pixel comprises N temperature measuring units, and N is a positive integer greater than or equal to 2;

the first temperature measuring unit receives first radiation energy to obtain first heat radiation information;

the Nth temperature measuring unit receives the Nth radiation energy to obtain Nth heat radiation information;

the first to nth heat radiation information are different;

a processing unit which obtains distribution data or a relative ratio of at least two of the first to nth heat radiation information according to the first to nth heat radiation information;

the distribution data or the relative ratio of the specific heat radiation information corresponds to the temperature information of the corresponding point of the target object;

the processing unit forms information related to the temperature of the target object.

2. The multicolor temperature measurement based device as claimed in claim 1,

and the processing unit acquires the temperature distribution information of the target object according to the temperature information measured by each pixel.

3. The multicolor temperature measurement based device according to claim 1,

the storage unit is connected with the processing unit and stores the radiation energy density of the object at different temperatures and/or the distribution data or relative ratio responded by each temperature measuring unit;

the processing unit reads the radiation energy density of the object at different temperatures and/or the distribution data or relative ratio of the responses of the temperature measuring units;

and the processing unit looks up a table according to at least two of the first thermal radiation information and the Nth thermal radiation information and compares the radiation energy density of the object at different temperatures and/or the distribution data or relative ratio responded by each temperature measuring unit to obtain the temperature of the measured target object.

4. The multicolor temperature measurement-based device according to claim 3, wherein the radiation energy density of the object at different temperatures and/or the distribution data or relative ratio of the responses of the temperature measurement units stored in the storage unit are acquired and calibrated by the temperature measurement device by presetting different temperatures of the calibration temperature source;

or directly obtaining the black body radiation curve and/or the temperature measuring unit response curve.

5. The multicolor temperature measurement based device according to claim 1,

the first temperature measuring unit is provided with a first spectral response curve to obtain first thermal radiation information;

the Nth temperature measurement unit is provided with an Nth spectral response curve to obtain Nth thermal radiation information;

the first spectral response curve to the Nth spectral response curve are different.

6. The multi-color thermometry-based device of claim 5, wherein the first thermometry unit is responsive to thermal radiation in a first wavelength range to obtain first thermal radiation information;

the Nth temperature measuring unit responds to the heat radiation in the Nth wavelength range to obtain Nth heat radiation information;

the first wavelength range to the Nth wavelength range are different.

7. The multicolor temperature measurement based device according to claim 1, wherein the first temperature measurement unit operates in a first operating state to obtain first thermal radiation information;

the Nth temperature measuring unit works in an Nth working state to obtain Nth heat radiation information;

the first temperature measuring unit and the Nth temperature measuring unit are the same detector, and the detector has two or more working states; the first working state is different from the Nth working state;

the different states include:

changing the temperature of the detector to control the state of an optical resonant cavity of the thin film of the detector through mechanical stress;

or, applying voltage to the detector suspended film to control the state of the optical resonant cavity of the detector film through electrostatic force;

or, different states of the optical resonant cavity are directly finished in the production and manufacturing process;

or the spectral response of each temperature measuring unit is different by controlling the difference of single factors or the combination of multiple factors in the height, thickness, structure, shape, size, material and composition of the temperature measuring unit;

alternatively, different patterns are fabricated on the thermometric units such that the spectral response of each thermometric unit is different.

8. The multicolor temperature measurement based device according to claim 1,

temperature distribution information is obtained from temperature information obtained by a plurality of pixels.

9. The multicolor temperature measurement based device according to claim 1, wherein the temperature measurement units of the pixels are distributed on at least two different thermal imagers;

each thermal imager comprises a plurality of temperature measuring units;

a temperature measuring unit of the first thermal imager receives first radiation energy to obtain first thermal radiation information;

a temperature measuring unit of the Nth thermal imager receives the Nth radiant energy to obtain Nth thermal radiation information;

the temperature measuring units of the first thermal imager, the second thermal imager, the third thermal imager and the fourth thermal imager correspond to the same point on a target object to be measured;

the temperature measuring units of the first thermal imager, the second thermal imager and the Nth thermal imager form a pixel;

the processing unit obtains temperature information of a corresponding point of the target object according to the first to Nth heat radiation information;

and obtaining the temperature distribution information of the target object through the temperature information obtained by the plurality of pixels.

10. The multicolor temperature measurement based device as claimed in claim 9,

the transmittance curves of the receiving light paths of the different thermal imagers are different;

and the receiving light paths of different thermal imagers have different optical designs and/or different optical materials and/or different coatings.

11. The multicolor temperature measurement-based device according to claim 1, wherein the receiving optical path of at least one of the first temperature measurement unit to the Nth temperature measurement unit is provided with an optical filter, and the optical filter transmits light with a specific wavelength range;

or at least one receiving light path from the first temperature measuring unit to the Nth temperature measuring unit is provided with a coating film, and the coating film transmits light in a specific wavelength range;

and transmittance curves of the optical filters or the coatings from the first temperature measuring unit to the Nth temperature measuring unit are different.

12. The polychrome thermometry based apparatus of any one of claims 1-11, wherein the spectral response of the individual pixels and/or thermometry units with respect to incident light is different.

13. The multicolor temperature measurement based device according to claim 12,

the first temperature measuring unit to the Nth temperature measuring unit receive at least part of light in a range from visible light to long-wave infrared rays.

14. The multi-color thermometry-based device of claim 13, wherein the first through nth thermometry units receive at least one of visible light, near infrared light, short wave infrared light, medium wave infrared light, and long wave infrared light.

15. A multicolor temperature measurement based method is characterized in that at least two pixels are provided, each pixel comprises N temperature measurement units, and N is a positive integer greater than or equal to 2;

the method comprises the following steps:

the first temperature measuring unit receives the first radiation energy to obtain first heat radiation information;

the Nth temperature measuring unit receives the Nth radiation energy to obtain Nth heat radiation information;

the first to nth heat radiation information are different;

the processing unit obtains relative ratio or distribution data of at least two of the first to N-th heat radiation information according to the first to N-th heat radiation information;

the relative ratio or distribution data of the heat radiation information corresponds to the temperature of a specific target object;

the processing unit forms information related to the temperature of the target object.

16. The multicolor temperature measurement based method according to claim 15,

the storage unit stores the radiation energy density of the object at different temperatures and/or the response distribution data or relative ratio of the temperature measuring units;

the processing unit reads the radiation energy density of the object at different temperatures and/or the distribution data or relative ratio of the responses of the temperature measuring units;

and the processing unit looks up a table according to at least two of the first thermal radiation information and the Nth thermal radiation information and compares the radiation energy density of the object at different temperatures and/or the distribution data or relative ratio responded by each temperature measuring unit to obtain the temperature of the measured target object.

17. The multicolor thermometry based method of claim 16,

the first temperature measuring unit to the Nth temperature measuring unit receive at least one of visible light, near infrared light, short wave infrared light, medium wave infrared light and long wave infrared light.

18. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out a method for polychrome thermometry based on any one of claims 15-17.

Technical Field

The invention relates to the field of temperature measurement, in particular to a device and a method based on multicolor temperature measurement and a storage medium.

Background

At present, the working principle of a thermal imaging camera is that thermal radiation of an object in a certain wavelength range is received, and the temperature of the object can be obtained according to the energy of the thermal radiation. In order to obtain the correct temperature, the thermal imager generally needs to be calibrated in advance by a black body (the radiation rate of the ideal black body is 1) capable of adjusting the temperature.

However, in general, the object is not an ideal black body, and its emissivity is less than 1. The object will also reflect energy from the surroundings so that a conventional thermal imager actually measures the total energy (within a certain solid angle) received by the instrument over a certain wavelength range, i.e. the object reflects energy from the surroundings

W＝W0+τW1

Where W0 is the theoretical radiant energy of the object, W1 is the radiant energy of the surrounding environment, the object radiance, τ is the object reflectivity, and τ is 1-in the case of an opaque object.

The principle of thermal imager temperature measurement is that the theoretical radiant energy W0 of an object is estimated by the total energy W received by the thermal imager, and then the temperature of the object is calculated by the W0. Therefore, if the emissivity of the object is not estimated accurately, temperature measurement errors can be caused.

As shown in fig. 1, according to the blackbody radiation law, when the temperature of an object changes, the shape of the radiant energy distribution curve thereof will also change. For objects with the same temperature but different radiances, the radiant energy profiles are the same in shape but different in amplitude by one radiance, and in most applications, the user is concerned with high temperature objects, so the interference caused by the reflected ambient energy W1 is substantially negligible.

The existing temperature measuring device can only measure an object with specific radiance; in addition, in the production and installation process, the black body calibration is required, and the production and installation process is very complicated. Therefore, it is desirable to provide a temperature measuring device which can make the temperature measurement result independent of the radiance, thereby improving the accuracy of temperature measurement. Furthermore, the calibration is not needed to be carried out in advance by using a black body with adjustable temperature, but the known black body radiation curve and/or the response curve of the temperature measuring unit are directly adopted, so that the production convenience is improved.

Disclosure of Invention

The invention aims to provide a device based on multicolor temperature measurement, which can enable the temperature measurement result to be irrelevant to radiance according to the shape information of a radiation energy density distribution curve, thereby improving the accuracy of temperature measurement. Furthermore, the black body with adjustable temperature is not needed to be calibrated in advance, and the convenience of production is improved.

The invention provides a device based on multicolor temperature measurement, which comprises: the pixel temperature measuring device comprises at least two pixels, wherein each pixel comprises N temperature measuring units, and N is a positive integer greater than or equal to 2; the first temperature measuring unit receives first radiation energy to obtain first heat radiation information; the Nth temperature measuring unit receives the Nth radiation energy to obtain Nth heat radiation information; the first to nth heat radiation information are different; a processing unit which obtains a relative ratio or distribution data of the heat radiation information according to the first to nth heat radiation information; the relative ratio or the distribution data correspond to the temperature information of the corresponding point of the target object; the processing unit forms information related to the temperature of the target object.

The multicolor temperature measurement-based device has the beneficial effects that: according to the shape information of the radiation energy density distribution curve, the temperature measurement result is unrelated to the radiance, and therefore the accuracy of temperature measurement is improved. Furthermore, the known blackbody radiation curve and/or the response curve of the temperature measuring unit are/is utilized, and the calibration is not required to be carried out in advance by using a blackbody with adjustable temperature, so that the production convenience of the temperature measuring device is improved.

Preferably, the processing unit obtains the information of the temperature distribution of the target object according to the temperature information measured by each pixel.

Preferably, the temperature measuring device further comprises a storage unit, wherein the storage unit is connected with the processing unit and stores the radiation energy density of the object at different temperatures and/or the distribution data or relative ratio of the responses of the temperature measuring units; the processing unit reads the radiation energy density of the object at different temperatures and/or the distribution data or relative ratio of the responses of the temperature measuring units; and the processing unit looks up a table according to at least two of the first thermal radiation information and the Nth thermal radiation information and compares the radiation energy density of the object at different temperatures and/or the distribution data or relative ratio responded by each temperature measuring unit to obtain the temperature of the measured target object. Objects with different radiances have the same shape of radiance at the same temperature but differ by a factor of radiance, so the distribution data is usually normalized to make it independent of radiance.

Preferably, the radiation energy density of the object at different temperatures and/or the distribution data or relative ratio of the responses of the temperature measuring units stored in the storage unit are acquired and calibrated by the temperature measuring device through presetting different temperatures of the calibration temperature source; or directly obtaining the spectrum response curve according to the black body radiation curve and/or each temperature measuring unit.

Preferably, the first temperature measuring unit has a first spectral response curve to obtain first thermal radiation information; the Nth temperature measurement unit is provided with an Nth spectral response curve to obtain Nth thermal radiation information; the first spectral response curve to the Nth spectral response curve are different.

Preferably, the first temperature measuring unit responds to the heat radiation in the first wavelength range to obtain first heat radiation information; the Nth temperature measuring unit responds to the heat radiation in the Nth wavelength range to obtain Nth heat radiation information; the first wavelength range to the Nth wavelength range are different.

Preferably, the first temperature measuring unit works in a first working state to obtain first thermal radiation information; the Nth temperature measuring unit works in an Nth working state to obtain Nth heat radiation information; the first temperature measuring unit and the Nth temperature measuring unit are the same detector, and the detector has two or more working states; the first working state is different from the Nth working state; the different states include: changing the temperature of the detector to control the state of an optical resonant cavity of the thin film of the detector through mechanical stress; or, applying voltage to the detector suspended film to control the state of the optical resonant cavity of the detector film through electrostatic force; or, different states of the optical resonant cavity are directly finished in the production and manufacturing process; or the spectral response of each temperature measuring unit is different by controlling the combination of one or more factors of the height, thickness, shape, structure, material, size, composition and the like of the temperature measuring unit; alternatively, different patterns are fabricated on the thermometric units such that the spectral response of each thermometric unit is different.

Preferably, the temperature distribution information is obtained from temperature information obtained by a plurality of pixels.

Preferably, the temperature measuring units of the pixels are distributed on at least two different thermal imagers; each thermal imager comprises a plurality of temperature measuring units; a temperature measuring unit of the first thermal imager receives first radiation energy to obtain first thermal radiation information; a temperature measuring unit of the Nth thermal imager receives the Nth radiant energy to obtain Nth thermal radiation information; the temperature measuring units of the first thermal imager, the second thermal imager and the third thermal imager correspond to the same point on the object; the processing unit enables the first temperature measuring unit to the Nth temperature measuring unit to form a pixel, temperature information of a corresponding point of the target object is obtained, and temperature distribution information of the target object is obtained through the temperature information obtained by the plurality of pixels.

The thermal imager in the patent refers to a generalized imaging device capable of receiving thermal radiation, and comprises a receiving light path and a detector with two or more pixels, wherein the detector responds to at least partial wave bands from visible light to long-wave infrared light (380 nm-30 um).

Preferably, the transmittance curves of the receiving light paths of the different thermal imagers are different, for example, the optical design is different, and/or the optical material is different, and/or the coating is different.

Preferably, at least one of the first temperature measuring unit to the nth temperature measuring unit has a light filter in a receiving light path, and the light filter transmits light in a specific wavelength range; or at least one of the first temperature measurement unit and the Nth temperature measurement unit is provided with a coating film on a receiving light path, and the coating film transmits light in a specific wavelength range.

Preferably, the transmittance curves of the receiving light paths are different, for example, the transmittance curves of the optical filters or the coating films are different.

Preferably, the specific wavelength ranges are different from each other.

Preferably, the spectral responses of the temperature measuring units on the same pixel are different.

Preferably, the first temperature measurement unit to the Nth temperature measurement unit receive at least part of light in a range from visible light to long-wave infrared light.

Preferably, the first temperature measurement unit to the nth temperature measurement unit receive at least one of visible light, near infrared light, short wave infrared light, medium wave infrared light and long wave infrared light.

The invention also provides a multicolor temperature measurement based method, which is characterized in that at least two pixels are provided, each pixel comprises N temperature measurement units, and N is a positive integer greater than or equal to 2; the method comprises the following steps: the first temperature measuring unit receives the first radiation energy to obtain first heat radiation information; the Nth temperature measuring unit receives the Nth radiation energy to obtain Nth heat radiation information; the first to nth heat radiation information are different; the processing unit obtains relative ratio or distribution data according to the first to Nth heat radiation information; the relative ratio or distribution data corresponds to a particular target object temperature; the processing unit forms information related to the temperature of the target object.

The multicolor temperature measurement-based method has the beneficial effects that: partial information of the radiation energy density distribution curve can be obtained, so that the temperature measurement result is irrelevant to the radiance, and the accuracy of temperature measurement is improved. Furthermore, the known blackbody radiation curve and/or the response curve of the temperature measuring unit are/is utilized, and the calibration is not required to be carried out in advance by using a blackbody with adjustable temperature, so that the production convenience of the temperature measuring device is improved.

Preferably, the storage unit stores the radiation energy density of the object at different temperatures and/or the distribution data or relative ratio of the responses of the temperature measuring units; the processing unit reads the radiation energy density and/or the distribution data or relative ratio of the response of each temperature measuring unit at different temperatures; and the processing unit looks up a table according to at least two of the first thermal radiation information and the Nth thermal radiation information and compares the radiation energy density of the object at different temperatures and/or the distribution data or relative ratio responded by each temperature measuring unit to obtain the temperature of the target object. Objects with different radiances have the same shape of radiance at the same temperature but differ by a factor of radiance, so the distribution data is usually normalized to make it independent of radiance.

Preferably, the first temperature measurement unit to the nth temperature measurement unit receive at least one of visible light, near infrared light, short wave infrared light, medium wave infrared light and long wave infrared light.

The invention also provides a computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the aforementioned method based on polychrome thermometry.

The computer readable storage medium has the advantages that: partial information of the radiation energy density distribution curve can be obtained, so that the temperature measurement result is irrelevant to the radiance, and the accuracy of temperature measurement is improved. Furthermore, the known blackbody radiation curve and/or the response curve of the temperature measuring unit are/is utilized, and the calibration is not required to be carried out in advance by using a blackbody with adjustable temperature, so that the production convenience of the temperature measuring device is improved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a diagram of a blackbody radiation curve, i.e., a distribution of radiant energy density with wavelength;

FIG. 2 is a schematic view of an apparatus according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of each pixel including two adjacent temperature measurement units according to an embodiment of the present invention;

FIG. 4 is a schematic diagram of two corresponding temperature measurement units of a thermal imager included in each pixel according to the second embodiment of the present invention;

FIG. 5 is a schematic diagram of the first temperature measurement unit and the second temperature measurement unit having different wavelengths according to the embodiment of the present invention;

fig. 6 is a schematic diagram of a method according to a fourth embodiment of the present invention.

Description of reference numerals:

101. the system comprises an infrared imaging sensor 102, pixels 103, a first temperature measuring unit 104, a second temperature measuring unit 105, incident light 106, a first receiving light path 107, a second receiving light path 108, a first thermal imager 109 and a second thermal imager.

Detailed Description

In order to make the technical solutions of the present invention better understood by those skilled in the art, the technical solutions in the embodiments of the present invention will be clearly described below with reference to the drawings in the embodiments of the present invention, 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.

The appearances of the phrases "first," "N," "third," and the like in the various places in the specification, claims, and drawings are not necessarily all referring to the same order. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to the listed steps or elements but may alternatively include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.