WO2022141188A1

WO2022141188A1 - Thermal radiation detector-based temperature measurement method and device, and thermal radiation detector

Info

Publication number: WO2022141188A1
Application number: PCT/CN2020/141375
Authority: WO
Inventors: 陈超帅; 江宝坦; 李想; 曹子晟; 李琛; 夏斌强
Original assignee: 深圳市大疆创新科技有限公司
Priority date: 2020-12-30
Filing date: 2020-12-30
Publication date: 2022-07-07
Also published as: CN114616445A

Abstract

A thermal radiation detector (11)-based temperature measurement method and device (12), and a thermal radiation detector (11). Said method comprises: acquiring a detection image (40) acquired by a thermal radiation detector (11) when a shutter (32A) is in an open state, wherein the thermal radiation detector (11) comprises the shutter (32A) and a photosensitive element array (31), when the shutter (32A) is in the open state, the photosensitive element array (31) is partially blocked by a preset element (32) of the thermal radiation detector (11), so that the photosensitive element array (31) comprises photosensitive elements in a blocked region (31A) and photosensitive elements in a non-blocked region (31B), and the photosensitive elements in the non-blocked region (31B) can receive thermal radiation from a target object, and the detection image (40) comprises a first image region (41) corresponding to the blocked region (31A) and a second image region (42) corresponding to the non-blocked region (31B) (21); and determining the temperature of the target object with reference to pixel values in the first image region (41) and according to pixel values (A1-A10) in the second image region (42) (22). Said method can reduce the number of times of opening/closing of the shutter (32A), and solves the problem that the opening/closing of the shutter (32A) is too frequent.

Description

Temperature measurement method, device and thermal radiation detector based on thermal radiation detector

technical field

The present application relates to the technical field of temperature measurement, and in particular, to a temperature measurement method and device based on a thermal radiation detector, and a thermal radiation detector.

Background technique

As a non-contact temperature measurement method, thermal radiation temperature measurement has been widely used. For example, it can be applied in the fields of UAV power inspection, UAV railway inspection and other fields.

At present, since the uncooled thermal radiation detector does not have a cold aperture, when detecting the target object, the photosensitive element of the thermal radiation detector not only receives the thermal radiation of the target object through the optical system, but also receives the inner mirror of the thermal radiation detector. heat radiation from the cylinder. Usually, the solution is to set a shutter between the lens barrel and the photosensitive element, and consider that the shutter temperature is close to the lens barrel temperature, so the thermal radiation is also close; refer to the detection image obtained by detecting the thermal radiation of the shutter when the shutter is closed and the shutter The temperature of the target object is determined according to the detection image obtained by detecting the thermal radiation of the target object and the lens barrel when the shutter is opened.

However, since the temperature of the shutter keeps rising before the interior of the thermal radiation detector reaches a state of thermal equilibrium, it is necessary to frequently detect the thermal radiation of the lens barrel, which causes the shutter to be opened and closed too frequently.

SUMMARY OF THE INVENTION

Embodiments of the present application provide a temperature measurement method and device based on a thermal radiation detector, and a thermal radiation detector, so as to solve the problem that the shutter needs to be frequently detected for thermal radiation in the prior art, thereby causing the shutter to be opened and closed too frequently .

In a first aspect, an embodiment of the present application provides a temperature measurement method based on a thermal radiation detector, the method comprising:

Acquiring a detection image collected by the thermal radiation detector when the shutter is in an open state; wherein the thermal radiation detector includes the shutter and a photosensitive element array, and when the shutter is in an open state, the photosensitive element array is The preset elements of the thermal radiation detector are partially shielded, so that the photosensitive element array includes photosensitive elements in a shielded area and photosensitive elements in a non-shielded area, and the photosensitive elements in the non-shielded area can receive thermal radiation from a target object; the detection image includes a first image area corresponding to the occlusion area and a second image area corresponding to the non-occlusion area;

The temperature of the target object is determined with reference to the pixel values in the first image area and according to the pixel values in the second image area.

In a second aspect, an embodiment of the present application provides a thermal radiation detector, comprising: a shutter, a photosensitive element array, and a controller; the controller is configured to open the shutter when the thermal radiation detector detects;

When the shutter is in the open state, the photosensitive element array is partially shielded by the preset elements of the thermal radiation detector, so that the photosensitive element array includes the photosensitive elements in the shielded area and the photosensitive element in the non-shielded area. A photosensitive element, the photosensitive element in the function of the non-blocking area can receive thermal radiation from the target object;

The photosensitive element array is configured to receive thermal radiation when the shutter is in an open state to generate a detection image corresponding to the received thermal radiation, the detection image including a first image area corresponding to the shielded area and a corresponding detection image. in the second image area of the non-occlusion area.

In a third aspect, embodiments of the present application provide a temperature measurement device based on a thermal radiation detector, the device comprising: a memory and a processor;

the memory for storing program codes;

The processor calls the program code, and when the program code is executed, is configured to perform the following operations:

In a fourth aspect, an embodiment of the present application provides a movable platform, wherein a thermal radiation detector is provided on the movable platform, and the movable platform includes the thermal radiation detector based on any one of the third aspects. temperature measuring device.

In a fifth aspect, an embodiment of the present application provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and the computer program includes at least one piece of code, and the at least one piece of code can be executed by a computer , to control the computer to execute the method according to any one of the first aspects.

In a sixth aspect, an embodiment of the present application provides a computer program, characterized in that, when the computer program is executed by a computer, it is used to implement the method described in any one of the first aspect.

The embodiments of the present application provide a temperature measurement method and device based on a thermal radiation detector, and a thermal radiation detector. The pixel value in the first image area, and the temperature of the target object is determined according to the pixel value in the second image area corresponding to the non-occluded area in the detection image, so as to realize the reference to the pixel value in the first image area in the same detection image To determine the temperature of the target object, since the pixel value in the first image area can be obtained when the shutter is in the open state, it does not need to be obtained by closing the shutter, so the shutter opening and closing required to determine the temperature of the target object can be avoided, thereby solving the problem of It solves the problem of opening and closing the shutter too frequently in the traditional technology.

Description of drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the accompanying drawings used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are some embodiments of the present application. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without any creative effort.

1 is a schematic diagram of an application scenario of a temperature measurement method based on a thermal radiation detector provided by an embodiment of the present application;

2 is a schematic flowchart of a temperature measurement method based on a thermal radiation detector provided by an embodiment of the present application;

3A is a schematic diagram of a preset element partially shielding a photosensitive element array according to an embodiment of the present application;

3B is a schematic diagram of partially blocking a photosensitive element array when a shutter is in an open state according to an embodiment of the present application;

3C is a schematic diagram of completely blocking the photosensitive element array when the shutter is in a closed state according to an embodiment of the present application;

4 is a schematic diagram of a first image area and a second image area provided by an embodiment of the present application;

5 is a schematic flowchart of a temperature measurement method based on a thermal radiation detector provided by another embodiment of the present application;

FIG. 6 is a schematic diagram of at least a part of a region corresponding to a target object in a detection image provided by an embodiment of the present application;

7A is a schematic diagram of a photosensitive element in a shielded area receiving thermal radiation according to an embodiment of the present application;

7B is a schematic diagram of a photosensitive element in a non-blocking area receiving thermal radiation according to an embodiment of the present application;

8 is a schematic diagram of the radiation amount of thermal radiation received by a photosensitive element in a non-shielded area and a photosensitive element in a shielded area according to an embodiment of the present application;

FIG. 9 is a schematic structural diagram of a temperature measuring device based on a thermal radiation detector according to an embodiment of the present application.

Detailed ways

In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments It is a part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

The temperature measurement method based on the thermal radiation detector provided in the embodiment of the present application can be applied to the application scenario shown in FIG. 1 . As shown in FIG. 1 , the application scenario may include a thermal radiation detector 11 and a temperature measuring device 12 for measuring temperature based on the thermal radiation detector 11 .

The thermal radiation detector 11 is an uncooled thermal radiation detector, that is, when detecting a target object such as a target human body, the photosensitive element of the thermal radiation detector 11 receives the thermal radiation of the target object through the optical system. In addition, the thermal radiation of the inner cavity of the thermal radiation detector 11 is also received. It should be noted that, since the thermal radiation of the internal cavity of the thermal radiation detector 11 is mainly the thermal radiation of the lens barrel inside the thermal radiation detector, the temperature measurement method in the embodiment of the present application mainly considers the thermal radiation detector 11 Influence of thermal radiation of the cavity inside on temperature measurement.

The thermal radiation detector 11 may be, for example, an infrared detector or other detector that uses the thermal effect of thermal radiation to collect detection images. The thermal radiation detector 11 has a structure using the thermal radiation detector provided in the embodiment of the present application.

The temperature measuring device 12 can determine the temperature of the target object by using the method provided by the embodiment of the present application based on the detection image collected by the thermal radiation detector 11 .

The temperature measurement method based on a thermal radiation detector provided in the embodiment of the present application can be applied to a temperature measurement scenario that requires temperature measurement based on an uncooled thermal radiation detector, such as a movable platform. Exemplarily, the movable platform may include an unmanned aerial vehicle, an unmanned boat or an unmanned vehicle.

In one embodiment, the thermal radiation detector 11 and the temperature measuring device 12 may be integrated into the same device, for example, the thermal radiation detector 11 and the temperature measuring device 12 may both be included in an unmanned aerial vehicle.

In another embodiment, the thermal radiation detector 11 and the temperature measuring device 12 may be located in different equipment, for example, the thermal radiation detector 11 may be installed on a drone, and the temperature measuring device 12 may be included in the in the control terminal of the drone.

Some embodiments of the present application will be described in detail below with reference to the accompanying drawings. The embodiments described below and features in the embodiments may be combined with each other without conflict.

FIG. 2 is a schematic flowchart of a temperature measurement method based on a thermal radiation detector provided by an embodiment of the present application. The execution body of this embodiment may be the temperature measurement device 12 in FIG. 1 , and specifically may be the processor of the temperature measurement device 12 . As shown in FIG. 2, the method of this embodiment may include:

Step 21: Acquire a detection image collected by the thermal radiation detector when the shutter is in an open state; wherein, the thermal radiation detector includes the shutter and a photosensitive element array, and when the shutter is in an open state, the photosensitive The element array is partially shaded by the preset elements of the thermal radiation detector, so that the photosensitive element array includes photosensitive elements in the shaded area and photosensitive elements in the non-shaded area, and the photosensitive elements in the non-shaded area The element is capable of receiving thermal radiation from a target object; the detection image includes a first image area corresponding to the occluded area and a second image area corresponding to the non-occluded area.

In this step, when the shutter is in an open state, the photosensitive element array is partially shielded by the preset elements of the thermal radiation detector, and a schematic diagram of the shielding can be shown in FIG. 3A . Referring to 3A, since the photosensitive element array 31 is partially shielded by the preset element 32 of the thermal radiation detector, the photosensitive element array 31 includes the photosensitive element in the shielded area 31A and the photosensitive element in the non-shielded area 31B. Yuan.

It should be noted that the shape and size of the occlusion area shown in FIG. 3 are only examples, and the size and shape of the occlusion area can be flexibly realized according to requirements. Theoretically, it is guaranteed that the number of pixels in the corresponding first image area is at least 1 is enough.

It should be noted that the shape of the preset element 32 in FIG. 3A is only an example, and the preset element 32 may be a dedicated element dedicated to shielding the photosensitive element, or the preset element 32 may also be multiplexed with other functions Reuse components. In one embodiment, the preset element 32 may include the shutter, and when the preset element 32 is the shutter, a schematic diagram of forming the blocking area 31A and the non-blocking area 31B by the shutter 32A may be as shown in FIG. 3B . Further, when the shutter 32A in FIG. 3B changes from the open state to the closed state, it can be as shown in FIG. 3C .

Corresponding to FIG. 3A , as shown in FIG. 4 , the detection image 40 collected by the thermal radiation detector may include a first image area 41 corresponding to the shielded area and a second image area corresponding to the non-shielded area 42. The pixel value of a pixel in the detection image 40 is used to represent the intensity of radiation received by the photosensitive element corresponding to the pixel. In one embodiment, the detection image may specifically be a grayscale image, and in this case, the pixel value of the detection image may be a grayscale value.

Referring to FIG. 3A , since the front of the receiving direction of the photosensitive element in the blocking area 31A is blocked by the preset element 32 , the thermal radiation of the photosensitive element in the blocking area 31A when the target object is photographed by the optical system will also be blocked. In addition, since the thermal radiation detector is of an uncooled type, the preset element 21 will radiate heat, so the photosensitive element in the shielding area 31A can receive the thermal radiation of the preset element 21 . When the temperature of the preset element 32 and the lens barrel inside the thermal radiation detector are close, or the temperature measurement accuracy problem caused by the temperature difference is ignored, the heat of the preset element 21 received by the photosensitive element in the blocking area 31A can be Radiation, equivalent to the thermal radiation of the lens barrel. Therefore, the pixel values in the first image area 41 in FIG. 4 can be used to characterize the radiation intensity of the lens barrel inside the thermal radiation detector. Wherein, when the temperature difference between the preset element 32 and the lens barrel is within a preset range, it may indicate that the temperature of the preset element 32 and the lens barrel are close, and the preset range can be determined through experiments. For example, the preset range can be is ±0.1°,

Continuing to refer to FIG. 3A , since the front of the receiving direction of the photosensitive element in the non-blocking area 31B is not blocked by the preset element 32 , the photosensitive element in the non-blocking area 31B can receive thermal radiation from the target object. In addition, since the thermal radiation detector is of an uncooled type, the photosensitive element in the non-shielded area 31B can receive thermal radiation from the target object and thermal radiation from the lens barrel inside the thermal radiation detector. Therefore, the pixel values in the second image area 42 in Fig. 4 can be used to characterize the radiation intensity of the target object and the lens barrel inside the thermal radiation detector.

Step 22: Determine the temperature of the target object with reference to the pixel values in the first image area and according to the pixel values in the second image area.

In this step, since the pixel values in the first image area can be used to characterize the radiation intensity of the lens barrel inside the thermal radiation detector, the pixel values in the second image area can be used to characterize the target object and The radiation amount of the lens barrel inside the thermal radiation detector is strong or weak, so through the mathematical operation of the pixel value in the first image area and the pixel value in the second image area, the radiation amount that can be used to characterize the target object can be obtained. The pixel values of the strong and weak points can be obtained by referring to the pixel values in the first image area, and according to the pixel values in the second image area, the temperature of the target object can be determined.

It should be noted that, in practical applications, the specific method of performing mathematical operations on the pixel values in the first image area and in the second image area to obtain the pixel values used to characterize the radiation intensity of the target object can be determined according to requirements. Flexible implementation. Any specific method of determining the temperature of the target object with reference to the pixel values in the first image area in the same detection image falls within the protection scope of the present application.

Since the pixel value in the first image area can be obtained when the shutter is in an open state, it does not need to be obtained by closing the shutter. Therefore, the temperature of the target object is determined by referring to the pixel value in the first image area in the same detection image. The shutter is opened and closed by determining the temperature of the target object. Compared with the traditional technology, the temperature of the target object is determined by referring to the detection image obtained by detecting the thermal radiation of the shutter when the shutter is closed. Since the thermal radiation of the shutter is constantly changing, the thermal radiation of the shutter needs to be detected frequently and the shutter needs to be opened and closed frequently. The application can avoid opening and closing the shutter due to the need to determine the temperature of the target object, thereby solving the problem of opening and closing the shutter too frequently in the conventional technology.

In the method provided by the embodiment of the present application, by acquiring the detection image collected by the thermal radiation detector when the shutter is in the open state, referring to the pixel value in the first image area corresponding to the occlusion area in the detection image, and according to the corresponding pixel value in the detection image The pixel value in the second image area of the non-occlusion area determines the temperature of the target object, and the temperature of the target object is determined by referring to the pixel value in the first image area in the same detection image. The value can be obtained when the shutter is in an open state without closing the shutter, so the shutter opening and closing required to determine the temperature of the target object can be avoided, thus solving the problem of too frequent opening and closing of the shutter in the traditional technology.

FIG. 5 is a schematic flowchart of a temperature measurement method based on a thermal radiation detector provided by another embodiment of the present application. Based on the embodiment shown in FIG. 2 , this embodiment mainly describes the determination of pixel values with reference to the first image area. An optional implementation of the temperature of the target object. As shown in FIG. 5 , the method provided by this embodiment of the present application may include:

Step 51: Acquire a detection image collected by the thermal radiation detector when the shutter is in an open state; the thermal radiation detector includes the shutter and a photosensitive element array, and when the shutter is in an open state, the photosensitive element array is The preset elements of the thermal radiation detector are partially shielded, so that the photosensitive element array includes photosensitive elements in a shielded area and photosensitive elements in a non-shielded area, and the photosensitive elements in the non-shielded area can receive Thermal radiation from a target object; the detection image includes a first image area corresponding to the occlusion area and a second image area corresponding to the non-occlusion area.

It should be noted that step 51 is similar to step 21, and details are not repeated here.

Step 52: Determine a first pixel value based on the pixel value in the first image area, where the first pixel value is used to represent the intensity of radiation of the lens barrel inside the thermal radiation detector.

In this step, optionally, all pixel values in the first image area may be referred to, and the temperature of the target object may be determined according to the pixel values in the second image area. Based on this, step 51 may specifically include: determining a first pixel value based on pixel values of all pixels in the first image area. That is, the first pixel value used to characterize the intensity of radiation of the lens barrel inside the thermal radiation detector may be calculated based on the pixel values of all pixels in the first image area.

In one embodiment, the determining the first pixel value based on the pixel values of all pixels in the first image area may specifically include: when the number of pixels in the first image area is one, determining the pixel value of the pixel. The pixel value is taken as the first pixel value. Therefore, when the number of pixels corresponding to the photosensitive element blocked by the preset element is one, the pixel value of the pixel can be used as the first pixel for characterizing the radiation intensity of the lens barrel inside the thermal radiation detector. value.

In another embodiment, the determining the first pixel value based on the pixel values of all the pixels in the first image area may specifically include: when the number of pixels in the first image area is multiple, determining the first pixel value. The pixel values of the plurality of pixels are subjected to a first mathematical operation to obtain the first pixel value. Therefore, when the number of pixels corresponding to the photosensitive elements blocked by the preset element is multiple, the mathematical operation result of the pixel values of the multiple pixels can be used as the radiation used to characterize the lens barrel inside the thermal radiation detector. The first pixel value of the intensity.

Wherein, the first mathematical operation may be flexibly implemented according to requirements. Exemplarily, the first mathematical operation may be an average operation. Based on this, the performing a first mathematical operation on the pixel values of the plurality of pixels to obtain the first pixel value may specifically include: averaging the pixel values of the plurality of pixels to obtain the first pixel value. In one embodiment, when the weights of multiple pixels in calculating the first pixel value are the same, the pixel values of the multiple pixels may be arithmetically averaged to obtain the first pixel value. In another embodiment, when the weights of the first pixel values calculated by the plurality of pixels are different, the pixel values of the plurality of pixels may be weighted and averaged to obtain the first pixel value.

Or, optionally, the problem of the target object may be determined by referring to some pixel values in the first image area and based on the pixel values in the second image area. Based on this, step 51 may specifically include: determining a first pixel value based on a pixel value of a target pixel in the first image area, where the target pixel is a partial pixel in the first image area. That is, the first pixel value used to characterize the intensity of radiation of the lens barrel inside the thermal radiation detector may be calculated based on pixel values of some pixels in the first image.

In one embodiment, the determining the first pixel value based on the pixel value of the target pixel in the first image area may specifically include: when the number of the target pixels is one, converting the pixel value of the target pixel to one. as the first pixel value. Therefore, when the number of pixels corresponding to the photosensitive elements blocked by the preset element is multiple, the pixel value of one target pixel in the multiple pixels can be used as the radiation used to characterize the lens barrel inside the thermal radiation detector. The first pixel value of the intensity.

In another embodiment, the determining the first pixel value based on the pixel value of the target pixel in the first image area may specifically include: when the number of the target pixels is multiple, determining the first pixel value for a plurality of the target pixels. The pixel value of the pixel is subjected to a second mathematical operation to obtain the first pixel value. Therefore, when the number of pixels corresponding to the photosensitive elements blocked by the preset element is multiple, the mathematical operation result of the pixel values of the multiple target pixels in the multiple pixels can be used to characterize the thermal radiation detector. The first pixel value of the radiation intensity of the inner lens barrel.

Wherein, the second mathematical operation may be flexibly implemented according to requirements. Exemplarily, the second mathematical operation may be an average operation. Based on this, performing the second mathematical operation on the pixel values of the plurality of target pixels to obtain the first pixel value may specifically include: averaging the pixel values of the plurality of target pixels to obtain the first pixel value. A pixel value. In one embodiment, when the weights of the plurality of target pixels in calculating the first pixel value are all the same, the pixel values of the plurality of target pixels may be arithmetically averaged to obtain the first pixel value. In another embodiment, when the weights of the first pixel values calculated by the plurality of target pixels are different, the pixel values of the plurality of target pixels may be weighted and averaged to obtain the first pixel value.

Optionally, the target pixel may be a pixel corresponding to a photosensitive element located in a non-transition area in the occlusion area; the transition area is a preset determined at the junction between the occlusion area and the non-occlusion area. area.

Considering that there may be a gap between the preset element and the photosensitive element array, although the photosensitive element in the blocking area is blocked by the preset element, due to the existence of the gap, the photosensitive element in the blocking area is near the junction The photosensitive element will still receive the thermal radiation of the target object incident from a certain angle, so that the pixel value of the corresponding pixel of the photosensitive element near the junction is affected by the thermal radiation of the target object, thus affecting the junction near the junction. The pixel value of the corresponding pixel of the photosensitive element represents the accuracy of the radiation intensity of the lens barrel. Since the target pixel is the pixel corresponding to the photosensitive element located in the non-transition area in the occlusion area, it is possible to avoid using the pixel value in the first image area affected by the thermal radiation of the target object as a reference for determining the temperature of the target object. It is beneficial to improve the temperature measurement accuracy.

In one embodiment, the size of the transition area is positively related to the vertical distance between the preset element and the photosensitive element array when the shutter is in an open state. Since the greater the vertical distance between the photosensitive element array and the preset element, the more photosensitive elements in the occlusion area can receive the thermal radiation of the target object incident from certain angles, so the size of the transition area is related to the When the shutter is in the open state, the vertical distance between the preset element and the photosensitive element array is positively correlated, so that the range of the transition region can be appropriate.

In one embodiment, the thermal radiation detector may comprise a metal encapsulated detector or a ceramic encapsulated detector. In another embodiment, the thermal radiation detector includes a wafer-level packaged detector or a pixel-level packaged detector. For wafer-level packaged detectors and pixel-level packaged detectors, the transition area can be smaller because the photosensitive element can be closer to the optical window of the thermal radiation detector on which the shutter can be located.

Step 53: Determine the temperature of the target object with reference to the first pixel value and according to the pixel value in the second image area.

In this step, optionally, the temperature of the target object may be determined in units of pixels. Based on this, step 53 may specifically include: calculating the difference between the pixel value of each pixel in at least a part of the second image area and the first pixel value to obtain the second pixel value of the pixel, and the at least part of the pixel value is obtained. the area corresponds to the target object, and the second pixel value is used to represent the radiation intensity of the target object detected by the pixels in the at least part of the area; and, according to the second pixel value and different pixel values and temperatures The corresponding relationship of the target object is determined, and the temperature of the pixels in the at least part of the region corresponding to the target object is determined.

For example, assuming that the area corresponding to the target object is the area X in FIG. 6 , the difference between the pixel values of the pixels A1 to A10 in the detection image 40 and the first pixel value can be calculated respectively to obtain the first pixel values of the pixels A1 to A10 Two pixel values. Since the area X corresponds to the target object, the pixel values from the pixel value A1 to the pixel value A10 in the detection image 40 can represent the radiation intensity of the target object and the lens barrel together, and the first pixel value is used to represent the radiation dose of the lens barrel Intensity, by calculating the difference between the pixel values of the pixels A1 to A10 in the detected image and the first pixel value, the obtained second pixel values of the pixels A1 to A10 can represent the radiation of the target object detected by the pixels in the area X Quantity strength. Specifically, the second pixel value of the pixel A1 can represent the radiation intensity of the target object detected by the pixel A1, the second pixel value of the pixel A2 can represent the radiation intensity of the target object detected by the pixel A2, The second pixel value of the pixel A10 can represent the radiation intensity of the target object detected by the pixel A10.

Further, the temperature of the pixel A1 in the partial area X corresponding to the target object can be determined based on the second pixel value of the pixel A1 and the correspondence between different pixel values and temperatures; based on the second pixel value of the pixel A2 and the different pixel values and The corresponding relationship of the temperature, determine the temperature of the pixel A2 in the partial area X corresponding to the target object; ...; Based on the second pixel value of the pixel A10 and the corresponding relationship between different pixel values and temperatures, determine the partial area X corresponding to the target object The temperature of the medium pixel A10.

It should be noted that the area X corresponding to the target object in FIG. 6 is only an example.

Optionally, the temperature may be determined by taking the target object as a whole. Based on this, step 53 may specifically include: performing a third mathematical calculation (for example, averaging) on the pixels in at least part of the second image area to obtain a third pixel value, and the at least part of the area corresponds to the target object , the third pixel value is used to characterize the radiation intensity of the target object and the lens barrel together; the difference between the third pixel value and the first pixel value is calculated to obtain the fourth pixel value, so The fourth pixel value is used to characterize the radiation intensity of the target object; and the temperature of the target object is determined according to the fourth pixel value and the corresponding relationship between different pixel values and temperatures.

For example, assuming that the area corresponding to the target object is the area X in FIG. 6 , the pixel values of pixels A1 to A10 in the detection image 40 can be averaged to obtain the third pixel value, and then the third pixel value and the first pixel value can be calculated. The difference between the pixel values yields the fourth pixel value. Since the area X corresponds to the target object, the average of the pixel values from the pixel value A1 to the pixel value A10 in the detection image 40 can represent the radiation intensity of the target object and the lens barrel together, and the first pixel value is used to represent the radiation intensity of the lens barrel. The radiation intensity, by calculating the difference between the third pixel value and the first pixel value, the obtained fourth pixel value can represent the radiation intensity of the target object in the area X. Further, the temperature of the target object may be determined based on the fourth pixel value and the corresponding relationship between different pixel values and temperatures.

It should be noted that, the above-mentioned correspondence between different pixel values and temperatures may be obtained by pre-calibration. It can be seen that the method of determining the temperature of the target object with reference to the first pixel value in the embodiment of the present application only needs to mark the corresponding relationship between a set of pixel values and the temperature, which is different from the traditional technology, which requires a set of calibrations for different shutter temperatures. Compared with the corresponding relationship between the pixel value and the temperature, the calibration workload can be reduced and labor costs can be saved.

In the method provided by the embodiment of the present application, the first pixel value is determined based on the pixel value in the first image area, and the first pixel value is used to characterize the radiation intensity of the lens barrel inside the thermal radiation detector. Refer to the first pixel value. value, and determine the temperature of the target object according to the pixel value in the second image area, so that the target object temperature is determined by referring to the pixel value in the first image area in the same detection image, because the pixel value in the first image area The value can be obtained when the shutter is in an open state, without the need to close the shutter, thus solving the problem that the shutter is opened and closed too frequently in the traditional technology.

In addition, since the pixel values in the first image area that are referenced when determining the temperature of the target object in the embodiments of the present application and the pixel values in the second image area that are based on determining the temperature of the target object are included in the same detection image, Therefore, the real-time performance of the pixel value referenced in determining the temperature of the target object can be ensured. However, in the conventional technique, the temperature of the target object is determined by referring to the detection image obtained by detecting the thermal radiation of the shutter when the shutter is closed, and the detection image is detected at the i-th shutter closing time and the detection image is detected at the i+1-th shutter closing time. Between images, it is necessary to use the detection image detected by closing the shutter for the i-th time to determine the temperature of the target object, and the detection image referenced for determining the temperature of the target object has poor real-time performance.

In addition, when the external environment temperature changes, whether it is from the wind from the UAV blades or the wind from the external environment, the photosensitive element in the blocked area and the photosensitive element in the non-blocked area receive the same amount of radiation from the lens barrel. Therefore, the temperature measurement result of the temperature measurement method provided by the embodiment of the present application for the target object is not changed by the change of the ambient temperature, and has strong robustness and strong wind resistance.

On the basis of the foregoing method embodiments, optionally, the exposure parameters of the first image area and the second image area may be different. Wherein, the exposure parameter may be any type of parameter used to control the exposure of the detection image, and exemplarily, the exposure parameter may include exposure time or exposure gain. Because the exposure parameters of the first image area and the second image area are different, the exposure of the first image area and the second image area can be controlled respectively according to requirements, which is beneficial to improve the flexibility of exposure.

It should be noted that although both the photosensitive element in the non-shielded area and the photosensitive element in the shielded area can receive the thermal radiation of the lens barrel, due to the influence of the occlusion of the preset element, the thermal radiation of the lens barrel is incident to the The angular magnitudes of the photosensitive cells in the non-blocked area and the photosensitive cells in the blocked area are different. In addition, since the radiation amount of the thermal radiation of the lens barrel received by the photosensitive element is proportional to the angle at which the thermal radiation of the lens barrel is incident on the photosensitive element, the photosensitive element in the non-shielded area and the photosensitive element in the shielded area are both proportional to each other. The radiation amount of the thermal radiation received by the lens tube for the same duration is different.

Based on this, optionally, the exposure parameters of the first image area and the second image area may satisfy a preset ratio condition, so as to reduce the incidence of thermal radiation of the lens barrel to the photosensitive element in the shielded area The difference in the amount of radiation caused by the angle of the photosensitive element in the non-blocking area is beneficial to improve the temperature measurement accuracy.

In order to make the design of the preset ratio conditions more reasonable, the characteristics of the photosensitive element in the non-blocked area and the photosensitive element in the blocked area to receive the thermal radiation of the lens barrel are analyzed respectively. In addition, in order to simplify the analysis of the thermal radiation received by the photosensitive element, two-dimensional radiation is taken as an example for description in conjunction with FIG. 7A and FIG. 7B .

Referring to FIG. 7A , the angle at which the thermal radiation of the preset element 32 (equivalent to the thermal radiation of the lens barrel) is incident on the photosensitive element a in the shielding area is in the range of 180°. By analogy to the spatial stereo radiation, it can be known that the spatial solid angle of the photosensitive element in the occlusion area receiving the thermal radiation of the lens barrel is the hemispherical space 2π solid angle.

Referring to FIG. 7B , the sum of the angles at which the thermal radiation of the lens barrel and the target object is incident on the photosensitive element b in the non-blocking area is 180°, wherein the angle at which the thermal radiation of the target object is incident on the photosensitive element b is α, The angle at which the thermal radiation of the lens barrel is incident on the photosensitive element b is (180°-α). By analogy to the spatial stereo radiation, it can be known that the sum of the spatial solid angles of the photosensitive element in the non-blocking area receiving the thermal radiation of the lens barrel and the target object is the hemispherical space 2π solid angle, and the photosensitive element in the non-blocking area receives the thermal radiation of the lens barrel. The spatial solid angle of radiation is 2π-Ω, wherein Ω represents the spatial solid angle of the thermal radiation of the target object entering the photosensitive element array. It should be noted that the spatial solid angle at which the thermal radiation of the target object enters the photosensitive element array is determined by the optical system of the thermal radiation detector, that is, after the optical system of the thermal radiation detector is determined, the photosensitive element array The solid angle of space receiving the thermal radiation of the target object has been determined.

It should be noted that the straight line with arrows in FIG. 7A represents the thermal radiation of the preset element, the thin line with arrows in FIG. 7B represents the thermal radiation of the lens barrel, and the thick straight line with arrows in FIG. 7B represents the thermal radiation of the target object. radiation.

Based on this, optionally, the preset scale condition is related to the spatial solid angle at which the thermal radiation of the target object enters the photosensitive element array. Therefore, it is beneficial to improve the rationality of the preset ratio condition.

In addition, since the radiation amount of the thermal radiation of the lens barrel received by the photosensitive element is proportional to the angle at which the thermal radiation of the lens barrel is incident on the photosensitive element, and the angle of the thermal radiation of the lens barrel incident on the photosensitive element a in FIG. 7A is the same as that in Fig. In 7B, the ratio of the angle of incidence of the thermal radiation of the lens barrel to the photosensitive element b is 180°/(180°-α), so the ratio of the radiation amount of the thermal radiation of the lens barrel received by the photosensitive element a and the photosensitive element b for the same duration is 180°/(180°-α). By analogy to spatial stereo radiation, it can be known that the ratio of the radiation amount of the thermal radiation of the lens barrel received by the photosensitive element in the shielded area and the photosensitive element in the non-shielded area for the same duration is 2π/(2π-Ω).

Based on this, the preset ratio condition may include: the ratio of the exposure parameter of the first image area to the exposure parameter of the second image area is (2π-Ω)/2π; wherein, 2π represents Hemispherical space solid angle, Ω represents the space solid angle at which the thermal radiation of the target object enters the photosensitive element array. Therefore, under the exposure parameters, the radiation amount of the thermal radiation of the lens barrel received by the photosensitive elements in the shielded area and the non-shielded area can be equal, thereby improving the accuracy of temperature measurement.

Assuming that the amount of thermal radiation of the lens barrel received by the photosensitive elements in the shielded area and the non-shielded area can be equalized by using a preset ratio condition, then in the process of the constant rise of the internal temperature of the thermal radiation detector Detecting the same target object, the variation trend of the amount of radiation received by the photosensitive elements in the non-occlusion area and in the occlusion area can be shown in FIG. 8 . Referring to Figure 8, as the internal temperature of the thermal radiation detector continues to rise, the amount of radiation received by the photosensitive element in the shielded area and the amount of radiation received by the photosensitive element in the non-shielded area change synchronously and remain equal , the radiation amount of the target object received by the photosensitive element in the non-occlusion area remains unchanged, so that the temperature of the target object can be accurately determined in the process of increasing the internal temperature of the thermal radiation detector. It should be noted that the blank filled rectangular box in Figure 8 represents the radiation amount of the thermal radiation of the lens barrel received by the photosensitive element in the occluded area, and the rectangular box filled with vertical stripes represents the light received by the photosensitive element in the non-shielded area. The radiation amount of the thermal radiation of the target object, the rectangular box filled with horizontal stripes represents the radiation amount of the thermal radiation of the lens barrel received by the photosensitive element in the non-shielded area.

In one embodiment, the pixel values in the detection image can be used to represent the actual amount of radiation. In this case, the first pixel value can be used to characterize the radiation amount of the lens barrel inside the thermal radiation detector. Therefore, alternatively, in addition to reducing the incidence of the thermal radiation of the lens barrel from the angle that the exposure parameter satisfies the preset ratio condition, the angle of the photosensitive element in the shielded area and the photosensitive element in the non-shielded area is different due to the difference in angle. In addition to the difference in the amount of radiation brought about, the angle of the thermal radiation of the lens barrel can be reduced from the angle of correcting the first pixel value to the photosensitive element in the occlusion area and the photosensitive element in the non-shielded area. difference in the amount of radiation caused.

Based on this, determining the temperature of the target object with reference to the first pixel value and according to the pixel value in the second image area may specifically include: correcting the first pixel value by using a preset scale factor to obtain The correction result of the first pixel value; the temperature of the target object is determined according to the pixel value in the second image area with reference to the correction result of the first pixel value.

Exemplarily, the determining the temperature of the target object with reference to the correction result of the first pixel value and according to the pixel value in the second image area may specifically include: calculating at least a The difference between the pixel value of each pixel in the partial area and the correction result of the first pixel value is obtained to obtain the second pixel value of the pixel, the at least part of the area corresponds to the target object, and the second pixel value is characterizing the intensity of radiation of the target object detected by pixels in the at least part of the area; and, according to the second pixel value and the correspondence between different pixel values and temperature, determining the at least part of the target object corresponding to the The temperature of the pixels in the region.

Similarly, the preset scale factor is related to the spatial solid angle of the thermal radiation of the target object entering the photosensitive element array. Therefore, it is beneficial to improve the rationality of the preset proportional coefficient.

In one embodiment, the preset scale factor is equal to 2π/(2π-Ω), where 2π represents a hemispherical spatial solid angle, and Ω represents a spatial solid angle at which the thermal radiation of the target object enters the photosensitive element array. Based on this, the modifying the first pixel value by using a preset proportional coefficient to obtain a correction result of the first pixel value may specifically include: multiplying the first pixel value and the preset proportional coefficient, as the correction result of the first pixel value.

Embodiments of the present application further provide a thermal radiation detector, where the thermal radiation detector may include a shutter, a photosensitive element array, and a controller. The controller is configured to open the shutter when detection is required; when the shutter is in an open state, the photosensitive element array is partially shielded by a preset element of the thermal radiation detector, so that the photosensitive element array It includes a photosensitive element located in a blocking area and a photosensitive element located in a non-blocking area, and the photosensitive element in the non-blocking area function can receive thermal radiation from a target object; the photosensitive element array is used when the shutter is opened. In the state, thermal radiation is received to generate a detection image corresponding to the received thermal radiation, and the detection image includes a first image area corresponding to the shielded area and a second image area corresponding to the non-shielded area.

It should be noted that, for the specific description of the occlusion area, the non-occlusion area, the first image area and the second image area, reference may be made to the relevant description of the thermal radiation detector-based temperature measurement method provided in the foregoing embodiment, which is not repeated here. Repeat.

In one embodiment, the preset element may be a multiplexed element multiplexed with other functions. Exemplarily, the preset element may include the shutter for realizing the function of controlling the time that the thermal radiation of the target object illuminates the photosensitive element, such as the shutter 32A in FIG. 3B . In another embodiment, the preset element may be a dedicated element for shielding the photosensitive element, and based on this, the thermal radiation detector may further include the preset element.

Optionally, the preset element may be fixed in front of the receiving direction of the photosensitive element array, for example, fixed on the photosensitive element array or on the optical window of the thermal radiation detector. It should be noted that, when the non-uniformity correction of the photosensitive element array is performed, the shutter needs to be closed, and the pixel value of the detection image of the detector is adjusted to a reasonable range through the uniform radiation given by the shutter, and the preset element is fixed. In front of the receiving direction of the photosensitive element array, the preset element will be between the shutter and the photosensitive element array when the shutter is closed. Therefore, considering the non-uniformity correction, it can be used in the photosensitive element array in the following two cases. The way of fixing the preset element in front of the receiving direction: the first one, when the shutter is closed, when the temperature of the preset element and the shutter are close; or, without the need for non-uniformity calibration case.

Or, optionally, the thermal radiation detector may further include: a linkage mechanism connected with the shutter, configured to drive the preset element to move into the photosensitive element array while the shutter is opened the front of the receiving direction to form the blocking area. Therefore, when the shutter is opened, the photosensitive element array can be partially shielded by a preset element other than the shutter.

Further optionally, the linkage mechanism may also be used to drive the preset element to move out from the front of the receiving direction of the photosensitive element array when the shutter is closed. Therefore, when the shutter is closed, the preset element is not interposed between the photosensitive element array and the shutter, and the influence of the preset element on the non-uniformity calibration of the photosensitive element array can be avoided.

On the basis of the above embodiment of the thermal radiation detector, optionally, the thermal conductivity of the preset element may be greater than the preset thermal conductivity. The thermal conductivity of the preset element is greater than the preset thermal conductivity, so that the preset element can more easily obtain heat from the lens barrel, so that the temperature of the preset element can be as close to the temperature of the lens barrel as possible, which is beneficial to improve the accuracy of temperature measurement . Wherein, the preset element may be, for example, an aluminum structural member with high thermal conductivity. The preset thermal conductivity can be determined experimentally, for example.

On the basis of the above embodiments of the thermal radiation detector, optionally, the preset element may be far away from other components in the thermal radiation detector except the lens barrel whose temperature is greater than the preset temperature. By keeping the preset element away from other components in the thermal radiation detector except the lens barrel whose temperature is greater than the preset temperature, the preset element can be prevented from obtaining heat from other components as much as possible, so that the temperature of the preset element can be prevented from being affected by other elements. The influence of the device is beneficial to improve the accuracy of temperature measurement. Wherein, the preset temperature can be determined through experiments, for example.

On the basis of the above embodiment of the thermal radiation detector, optionally, the shielded area includes a non-transition area, and the transition area is a preset area determined at the boundary between the shielded area and the non-shielded area . Further optionally, optionally, the size of the transition area is positively correlated with the vertical distance between the preset element and the photosensitive element array when the door is in an open state. It should be noted that, for the specific content of the transition region, reference may be made to the relevant description of the temperature measurement method based on the thermal radiation detector provided in the foregoing embodiment, which will not be repeated here.

On the basis of the above embodiment of the thermal radiation detector, optionally, the controller may also be configured to use different exposure parameters to control the exposure of the first image area and the second image area. Exemplarily, the exposure parameter includes exposure time or exposure gain. Therefore, the exposure of the first image area and the second image area can be controlled respectively according to requirements, which is beneficial to improve the flexibility of exposure.

In one embodiment, the exposure parameters of the first image area and the second image area may satisfy a preset ratio condition. Optionally, the preset scale condition is related to the spatial solid angle at which the thermal radiation of the target object enters the photosensitive element array. Further optionally, the preset ratio condition includes: the ratio of the exposure parameter of the first image area to the exposure parameter of the second image area is (2π-Ω)/2π; wherein, 2π represents the hemispherical spatial solid angle, and Ω represents the spatial solid angle at which the thermal radiation of the target object enters the photosensitive element array. It should be noted that, for the specific content of the preset ratio condition, reference may be made to the relevant description of the temperature measurement method based on the thermal radiation detector provided in the foregoing embodiment, and details are not repeated here.

Based on the above embodiments of the thermal radiation detector, optionally, when the shutter is in an open state, the temperature difference between the preset element and the inner barrel of the thermal radiation detector is within a preset range. Therefore, when the shutter is in the open state, the thermal radiation of the preset element can be close to the thermal radiation of the inner lens barrel of the thermal radiation detector, so as to improve the temperature measurement accuracy. Wherein, the preset range can be determined through experiments, for example.

Based on the above embodiments of the thermal radiation detector, optionally, the photosensitive elements in the shielded area and the non-shielded area receive the same amount of radiation from the lens barrel inside the thermal radiation detector. Thereby, the problem of inaccurate temperature measurement caused by the different angles of the thermal radiation of the lens barrel entering the photosensitive element in the shielded area and the photosensitive element in the non-shielded area is solved, which is beneficial to improve the accuracy of temperature measurement.

In the thermal radiation detector provided by the embodiment of the present application, when the shutter is in an open state, the photosensitive element array is partially shielded by the preset elements of the thermal radiation detector, so that the photosensitive element array includes the photosensitive element in the shielded area and the photosensitive element in the non-shielded area. The photosensitive elements in the area, the photosensitive elements in the non-blocking area function can receive the thermal radiation from the target object, and the photosensitive element array is used to receive the thermal radiation when the shutter is in an open state to generate a corresponding thermal radiation. A detection image, the detection image includes a first image area corresponding to an occluded area and a second image area corresponding to a non-occluded area, so that the temperature of the target object can be determined with reference to the pixel values in the first image area in the same detection image, thereby solving the problem. The problem of opening and closing the shutter too frequently.

FIG. 9 is a schematic structural diagram of a temperature measurement device based on a thermal radiation detector provided by an embodiment of the present application. As shown in FIG. 9 , the device 90 may include: a processor 91 and a memory 92 .

The memory 92 is used to store program codes;

The processor 91 calls the program code, and when the program code is executed, is configured to perform the following operations:

Obtain the detection image collected by the thermal radiation detector when the shutter is in an open state; the thermal radiation detector includes the shutter and a photosensitive element array, and when the shutter is in an open state, the photosensitive element array is heated by the thermal radiation. The preset elements of the radiation detector are partially occluded, so that the photosensitive element array includes photosensitive elements in the occlusion area and photosensitive elements in the non-shielded area, and the photosensitive elements in the non-shielded area can receive information from the target object The detection image includes a first image area corresponding to the shielded area and a second image area corresponding to the non-shielded area;

The temperature measurement device based on the thermal radiation detector provided in this embodiment can be used to implement the technical solutions of the foregoing method embodiments, and the implementation principles and technical effects thereof are similar to those of the method embodiments, which will not be repeated here.

In addition, an embodiment of the present application further provides a movable platform, a thermal radiation detector is provided on the movable platform, and the movable platform includes the temperature measurement device based on the thermal radiation detector shown in FIG. 9 .

Those of ordinary skill in the art can understand that all or part of the steps of implementing the above method embodiments may be completed by program instructions related to hardware. The aforementioned program can be stored in a computer-readable storage medium. When the program is executed, the steps including the above method embodiments are executed; and the foregoing storage medium includes: ROM, RAM, magnetic disk or optical disk and other media that can store program codes.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: The technical solutions described in the foregoing embodiments can still be modified, or some or all of the technical features thereof can be equivalently replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the embodiments of the present application. scope.

Claims

A temperature measurement method based on a thermal radiation detector, characterized in that the method comprises:

Acquiring a detection image collected by the thermal radiation detector when the shutter is in an open state; wherein the thermal radiation detector includes the shutter and a photosensitive element array, and when the shutter is in an open state, the photosensitive element array is The preset elements of the thermal radiation detector are partially shielded, so that the photosensitive element array includes photosensitive elements in a shielded area and photosensitive elements in a non-shielded area, and the photosensitive elements in the non-shielded area can receive thermal radiation from a target object; the detection image includes a first image area corresponding to the occlusion area and a second image area corresponding to the non-occlusion area;

The temperature of the target object is determined with reference to the pixel values in the first image area and according to the pixel values in the second image area.
The method according to claim 1, wherein the determining the temperature of the target object by referring to pixel values in the first image area and according to the pixel values in the second image area comprises:

determining a first pixel value based on the pixel value in the first image area, where the first pixel value is used to characterize the radiation intensity of the lens barrel inside the thermal radiation detector;

The temperature of the target object is determined with reference to the first pixel value and according to the pixel value in the second image area.
The method according to claim 2, wherein the determining the temperature of the target object by referring to the first pixel value and according to the pixel value in the second image area comprises:

Calculate the difference between the pixel value of each pixel in at least part of the second image area and the first pixel value to obtain the second pixel value of the pixel, the at least part of the area corresponds to the target object, and the The second pixel value is used to characterize the radiation intensity of the target object detected by the pixels in the at least partial area;

According to the second pixel value and the corresponding relationship between different pixel values and temperatures, the temperature of the pixels in the at least part of the region corresponding to the target object is determined.
The method according to claim 2, wherein the determining the first pixel value based on the pixel value in the first image area comprises:

A first pixel value is determined based on pixel values of all pixels in the first image area.
The method according to claim 4, wherein the determining the first pixel value based on pixel values of all pixels in the first image area comprises:

When the number of pixels in the first image area is one, the pixel value of the pixel is taken as the first pixel value.
The method according to claim 4, wherein the determining the first pixel value based on pixel values of all pixels in the first image area comprises:

When the number of pixels in the first image area is multiple, a first mathematical operation is performed on the pixel values of the multiple pixels to obtain the first pixel value.
The method according to claim 6, wherein the performing a first mathematical operation on the pixel values of the plurality of pixels to obtain the first pixel value comprises:

The pixel values of the plurality of pixels are averaged to obtain the first pixel value.
The method according to claim 2, wherein the determining the first pixel value based on the pixel value in the first image area comprises:

A first pixel value is determined based on a pixel value of a target pixel in the first image area, where the target pixel is a partial pixel in the first image area.
The method according to claim 8, wherein the determining the first pixel value based on the pixel value of the target pixel in the first image area comprises:

When the number of the target pixel is one, the pixel value of the target pixel is used as the first pixel value.
The method according to claim 9, wherein the determining the first pixel value based on the pixel value of the target pixel in the first image area comprises:

When the number of the target pixels is multiple, a second mathematical operation is performed on the pixel values of the multiple target pixels to obtain the first pixel value.
The method according to claim 10, wherein the performing a second mathematical operation on the pixel values of a plurality of the target pixels to obtain the first pixel value comprises:

The pixel values of a plurality of the target pixels are averaged to obtain the first pixel value.
The method according to any one of claims 8-11, wherein the target pixel is a pixel corresponding to a photosensitive element located in a non-transition area in the occlusion area;

The transition area is a preset area determined at the boundary between the blocking area and the non-blocking area.
The method according to claim 12, wherein the size of the transition area is positively related to the vertical distance between the preset element and the photosensitive element array when the shutter is in an open state.
The method of claim 1, wherein the exposure parameters of the first image area and the second image area are different.
The method according to claim 14, wherein the exposure parameters of the first image area and the second image area satisfy a preset ratio condition.
The method according to claim 15, wherein the preset scale condition is related to the spatial solid angle of the thermal radiation of the target object entering the photosensitive element array.
The method according to claim 16, wherein the preset ratio condition comprises: a ratio of the exposure parameter of the first image area to the exposure parameter of the second image area is (2π- Ω)/2π; wherein, 2π represents the hemispherical spatial solid angle, and Ω represents the spatial solid angle at which the thermal radiation of the target object enters the photosensitive element array.
The method of claim 14, wherein the exposure parameter comprises exposure time or exposure gain.
The method according to claim 1, wherein the photosensitive elements in the shielded area and the non-shielded area receive the same amount of radiation from the lens barrel inside the thermal radiation detector.
The method of claim 1, wherein the thermal radiation detector comprises a wafer level package detector or a pixel level package detector.
The method of claim 1, wherein the thermal radiation detector comprises a metal package detector or a ceramic package detector.
The method of claim 1, wherein the preset element comprises the shutter.
A thermal radiation detector, comprising: a shutter, a photosensitive element array, and a controller; the controller is configured to open the shutter when the thermal radiation detector detects;

When the shutter is in the open state, the photosensitive element array is partially shielded by the preset elements of the thermal radiation detector, so that the photosensitive element array includes the photosensitive elements in the shielded area and the photosensitive element in the non-shielded area. A photosensitive element, the photosensitive element in the function of the non-blocking area can receive thermal radiation from the target object;

The photosensitive element array is configured to receive thermal radiation when the shutter is in an open state to generate a detection image corresponding to the received thermal radiation, the detection image including a first image area corresponding to the shielded area and a corresponding detection image. in the second image area of the non-occlusion area.
The thermal radiation detector of claim 23, wherein the preset element comprises the shutter.
The thermal radiation detector according to claim 23, wherein the thermal radiation detector further comprises the preset element.
The thermal radiation detector according to claim 25, wherein the preset element is fixed in front of the receiving direction of the photosensitive element array.
The thermal radiation detector according to claim 25, characterized in that, the thermal radiation detector further comprises: a linkage mechanism connected with the shutter, for driving the preheater when the shutter is opened It is assumed that the element is moved in front of the receiving direction of the photosensitive element array to form the shielding area.
The thermal radiation detector according to claim 27, wherein the linkage mechanism is further configured to drive the preset element from the front of the receiving direction of the photosensitive element array when the shutter is closed Move out.
The thermal radiation detector according to claim 23, wherein the thermal conductivity of the predetermined element is greater than the predetermined thermal conductivity.
The thermal radiation detector according to claim 23, wherein the predetermined element is far away from other components in the thermal radiation detector except the lens barrel whose temperature is greater than the predetermined temperature.
The thermal radiation detector according to claim 23, wherein the shielded area includes a non-transition area, and the transition area is a preset area determined at the junction between the shielded area and the non-shielded area .
The thermal radiation detector according to claim 31, wherein the size of the transition area is positively correlated with the vertical distance between the preset element and the photosensitive element array when the door is in an open state.
The thermal radiation detector according to claim 23, wherein the controller is further configured to use different exposure parameters to control the exposure of the first image area and the second image area.
The thermal radiation detector according to claim 33, wherein the exposure parameters of the first image area and the second image area satisfy a preset ratio condition.
The thermal radiation detector according to claim 34, wherein the preset ratio condition is related to the spatial solid angle at which the thermal radiation of the target object enters the photosensitive element array.
The thermal radiation detector according to claim 35, wherein the preset ratio condition comprises: the ratio of the exposure parameter of the first image area to the exposure parameter of the second image area is (2π-Ω)/2π; wherein, 2π represents the hemispherical spatial solid angle, and Ω represents the spatial solid angle at which the thermal radiation of the target object enters the photosensitive element array.
The thermal radiation detector according to claim 23, wherein when the shutter is in an open state, the temperature difference between the preset element and the inner barrel of the thermal radiation detector is within a preset range.
The thermal radiation detector of claim 33, wherein the exposure parameter comprises exposure time or exposure gain.
The method according to claim 23, wherein the photosensitive elements in the shielded area and the non-shielded area receive the same amount of radiation from the lens barrel inside the thermal radiation detector.
A temperature measurement device based on a thermal radiation detector, characterized in that the device comprises: a memory and a processor;

the memory for storing program codes;

The processor calls the program code, and when the program code is executed, is configured to perform the following operations:

Acquiring a detection image collected by the thermal radiation detector when the shutter is in an open state; wherein the thermal radiation detector includes the shutter and a photosensitive element array, and when the shutter is in an open state, the photosensitive element array is The preset elements of the thermal radiation detector are partially shielded, so that the photosensitive element array includes photosensitive elements in a shielded area and photosensitive elements in a non-shielded area, and the photosensitive elements in the non-shielded area can receive thermal radiation from a target object; the detection image includes a first image area corresponding to the occlusion area and a second image area corresponding to the non-occlusion area;

The temperature of the target object is determined with reference to the pixel values in the first image area and according to the pixel values in the second image area.
The device according to claim 40, wherein the processor is configured to refer to pixel values in the first image area and determine the temperature of the target object according to the pixel values in the second image area , including:

determining a first pixel value based on the pixel value in the first image area, where the first pixel value is used to characterize the radiation intensity of the lens barrel inside the thermal radiation detector;

The temperature of the target object is determined with reference to the first pixel value and according to the pixel value in the second image area.
The device according to claim 41, wherein the processor is configured to refer to the first pixel value and determine the temperature of the target object according to the pixel value in the second image area, specifically comprising:

Calculate the difference between the pixel value of each pixel in at least part of the second image area and the first pixel value to obtain the second pixel value of the pixel, the at least part of the area corresponds to the target object, and the The second pixel value is used to characterize the radiation intensity of the target object detected by the pixels in the at least partial area;

According to the second pixel value and the corresponding relationship between different pixel values and temperatures, the temperature of the pixels in the at least part of the region corresponding to the target object is determined.
The apparatus according to claim 41, wherein the processor is configured to determine the first pixel value based on the pixel value in the first image area, specifically comprising:

A first pixel value is determined based on pixel values of all pixels in the first image area.
The device according to claim 43, wherein the processor is configured to determine the first pixel value based on the pixel values of all pixels in the first image area, specifically comprising:

When the number of pixels in the first image area is one, the pixel value of the pixel is taken as the first pixel value.
The device according to claim 43, wherein the processor is configured to determine the first pixel value based on the pixel values of all pixels in the first image area, specifically comprising:

When the number of pixels in the first image area is multiple, a first mathematical operation is performed on the pixel values of the multiple pixels to obtain the first pixel value.
The device according to claim 45, wherein the processor is configured to perform a first mathematical operation on the pixel values of the plurality of pixels to obtain the first pixel value, specifically comprising:

The pixel values of the plurality of pixels are averaged to obtain the first pixel value.
The apparatus according to claim 41, wherein the processor is configured to determine the first pixel value based on the pixel value in the first image area, specifically comprising:

A first pixel value is determined based on a pixel value of a target pixel in the first image area, where the target pixel is a partial pixel in the first image area.
The device according to claim 47, wherein the processor is configured to determine the first pixel value based on the pixel value of the target pixel in the first image area, specifically comprising:

When the number of the target pixel is one, the pixel value of the target pixel is used as the first pixel value.
The device according to claim 48, wherein the processor is configured to determine the first pixel value based on the pixel value of the target pixel in the first image area, specifically comprising:

When the number of the target pixels is multiple, a second mathematical operation is performed on the pixel values of the multiple target pixels to obtain the first pixel value.
The device according to claim 49, wherein the processor is configured to perform a second mathematical operation on the pixel values of a plurality of the target pixels to obtain the first pixel value, which specifically includes:

The pixel values of a plurality of the target pixels are averaged to obtain the first pixel value.
The device according to any one of claims 47-50, wherein the target pixel is a pixel corresponding to a photosensitive element located in a non-transition area in the occlusion area;

The transition area is a preset area determined at the boundary between the blocking area and the non-blocking area.
The device according to claim 51, wherein the size of the transition area is positively related to the vertical distance between the preset element and the photosensitive element array when the shutter is in an open state.
41. The apparatus of claim 40, wherein the exposure parameters of the first image area and the second image area are different.
The device according to claim 53, wherein the exposure parameters of the first image area and the second image area satisfy a preset ratio condition.
The device according to claim 54, wherein the preset scale condition is related to the spatial solid angle at which the thermal radiation of the target object enters the photosensitive element array.
The device according to claim 55, wherein the preset ratio condition comprises: the ratio of the exposure parameter of the first image area to the exposure parameter of the second image area is (2π- Ω)/2π; wherein, 2π represents the hemispherical spatial solid angle, and Ω represents the spatial solid angle at which the thermal radiation of the target object enters the photosensitive element array.
The apparatus of claim 53, wherein the exposure parameter comprises exposure time or exposure gain.
The device according to claim 40, wherein the photosensitive elements in the shielded area and the non-shielded area receive the same amount of radiation from the lens barrel inside the thermal radiation detector.
The apparatus of claim 40, wherein the thermal radiation detector comprises a wafer level package detector or a pixel level package detector.
41. The apparatus of claim 40, wherein the thermal radiation detector comprises a metal encapsulated detector or a ceramic encapsulated detector.
41. The apparatus of claim 40, wherein the preset element comprises the shutter.
A movable platform provided with a thermal radiation detector, wherein the movable platform comprises the temperature measurement based on the thermal radiation detector according to any one of claims 40-61 device.
A computer-readable storage medium, characterized in that, the computer-readable storage medium stores a computer program, and the computer program includes at least one piece of code, and the at least one piece of code can be executed by a computer, so as to control the computer to execute as claimed in the claim. The method of any one of claims 1-22.
A computer program, characterized in that, when the computer program is executed by a computer, it is used to implement the method according to any one of claims 1-22.