CN111447413B - High-temperature monitoring method and device for preventing sun burn and storage device - Google Patents
High-temperature monitoring method and device for preventing sun burn and storage device Download PDFInfo
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- 206010042496 Sunburn Diseases 0.000 title claims abstract description 11
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- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/0003—Radiation pyrometry, e.g. infrared or optical thermometry for sensing the radiant heat transfer of samples, e.g. emittance meter
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- G—PHYSICS
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- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
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Abstract
The invention discloses a high-temperature monitoring method, equipment and a storage device for preventing sun burn, wherein the method comprises the following steps: acquiring position information of a monitoring camera, wherein the position information comprises longitude and latitude of an installation position of the monitoring camera; obtaining the position of the sun according to the position information of the monitoring camera and the monitoring time information of the monitoring camera; and when the position of the sun is in the shooting picture of the monitoring camera, the monitoring camera executes a protection measure for preventing the sun from being burnt. Through the mode, the purpose of preventing the infrared camera from being burnt by the sun when detecting a high-temperature object can be achieved.
Description
Technical Field
The application relates to the field of monitoring and alarming, in particular to a high-temperature monitoring method for preventing sun burn, high-temperature monitoring equipment and a storage device.
Background
With the development of science and technology and the application of artificial intelligence, more and more infrared cameras and visible light cameras are widely applied to the fields of forest fire prevention, environmental monitoring and the like, and the essence of infrared camera shooting is that a corresponding thermal infrared image is obtained in a mode that an infrared detector detects energy radiated by an object (namely heat dissipated by the object), so that a high-temperature object such as a fire point and the like can be detected through the collected thermal infrared image. The sun is used as a heating source, light rays emitted by the sun can be approximately parallel light, the parallel light rays can be converged on the heat sensor through the lens, if the heat sensor is directly opposite to the strong sun for long-time detection, the optical filter of the infrared detector or the visible light heat sensor can be burnt, when the infrared detector is burnt, the corresponding imaging pixel cannot be recovered, and a dead pixel or a dead block appears, so that the infrared image cannot be collected continuously or the collected infrared image is abnormal, and the device cannot be normally applied.
Therefore, it is necessary to provide a high temperature monitoring method, apparatus and storage device for preventing solar burn to solve the above technical problems.
Disclosure of Invention
The application provides a high-temperature monitoring method, equipment and a storage device for preventing sun burn, which can achieve the purpose of preventing an infrared camera from being burnt by the sun when detecting a high-temperature object.
In order to solve the technical problem, the application adopts a technical scheme that: the high-temperature monitoring method for preventing sun burn comprises the following steps:
acquiring position information of a monitoring camera, wherein the position information comprises longitude and latitude of an installation position of the monitoring camera;
obtaining the sun position according to the position information of the monitoring camera and the moment information monitored by the monitoring camera, wherein the sun position is an included angle between a connecting line of the earth center and the sun and the east on the equatorial plane, and the moment information is a time point when the monitoring camera monitors;
and when the position of the sun is in the shooting picture of the monitoring camera, the monitoring camera executes a protection measure for preventing the sun from being burnt.
In order to solve the above technical problem, another technical solution adopted by the present application is: providing a high temperature monitoring device, which comprises a processor and a memory coupled with the processor, wherein the memory stores program instructions for implementing the solar burn prevention high temperature monitoring method; the processor is used for executing the program instructions stored in the memory so as to carry out high-temperature monitoring alarm on the shot object in the shot picture of the monitoring camera.
In order to solve the above technical problem, the present application adopts another technical solution that: a storage device is provided, which stores a program file capable of realizing the solar burn prevention high-temperature monitoring method.
The beneficial effect of this application is:
according to the high-temperature monitoring method, the equipment and the storage device for preventing the sun from being burnt, the position information of the camera is obtained, the sun position is calculated according to the position information of the camera and the monitoring time information of the monitoring camera, and a burn prevention measure is executed when the sun position is in a shooting picture, so that the burn condition of the camera is avoided.
Further, when a shooting object with the temperature higher than the preset temperature is detected, the position of the sun is compared with the position of the high-temperature object to judge whether the high-temperature object is the sun or not, so that the accurate identification of the sun and the high-temperature object is realized, the high-temperature false alarm is avoided, and the alarm accuracy is improved;
furthermore, the sun position is obtained through the longitude and latitude of the installation position of the camera and the time information of the detected high-temperature object, the longitude and latitude and the time information are easy to obtain, the parameter error is small, the accuracy is high, and the calculation is simple.
Drawings
FIG. 1 is a schematic flow chart of a high temperature monitoring method for preventing solar burns according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of the sun position of a high temperature monitoring method for preventing sun burn according to one embodiment of the present invention;
FIG. 3 is a schematic view of the high temperature monitoring method for preventing solar burns according to one embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a high temperature monitoring device for preventing solar burns according to an embodiment of the present invention;
FIG. 5 is a schematic structural diagram of a high temperature monitoring apparatus according to an embodiment of the present invention;
FIG. 6 is a schematic structural diagram of a memory device according to an embodiment of the invention.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the 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 application.
The terms "first", "second" and "third" in this application are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any indication of the number of technical features indicated. Thus, a feature defined as "first," "second," or "third" may explicitly or implicitly include at least one of the feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless explicitly specifically limited otherwise. All directional indications (such as up, down, left, right, front, and rear … …) in the embodiments of the present application are only used to explain the relative positional relationship between the components, the movement, and the like in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indication is changed accordingly. 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 only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.
Fig. 1 is a schematic flow chart of a high-temperature monitoring method for preventing solar burns according to an embodiment of the present invention. It should be noted that the method of the present invention is not limited to the flow sequence shown in fig. 1 if the results are substantially the same. As shown in fig. 1, the method for monitoring high temperature to prevent solar burn is used for a high temperature monitoring camera, which may be an infrared camera, a visible light camera or other cameras with thermal radiation detection function, and essentially obtains a corresponding thermal infrared image by detecting energy radiated by an object (i.e. heat dissipated by the object) through an infrared detector, so that the high temperature object can be monitored through the thermal infrared image collected by the monitoring camera, and a high temperature alarm can be performed when the monitoring camera detects that a shooting object with a temperature higher than a preset temperature exists in a shooting picture, and the method includes the steps of:
Step S101: and acquiring the position information of the monitoring camera, wherein the position information comprises the longitude and the latitude of the installation position of the camera.
It should be noted that, in order to make the installation position information of the monitoring camera more accurate, in this embodiment, the monitoring camera may utilize a positioning system, such as a GPS, to position the camera to obtain the position information of the installation position of the camera, or may preset the installation position before installation, and input the position information of the installation position into the monitoring camera through an input device, such as an input key, an input touch screen, etc., where the position information includes a longitude and a latitude of the installation position. Step S102: and acquiring the position of the sun according to the position information of the monitoring camera and the monitoring time information of the monitoring camera.
It should be noted that, in the monitoring camera used for monitoring outdoor environment, since the sun is also a heat source and also radiates energy outwards, when the sun is in the monitoring shot picture, its infrared image may be displayed as a high-temperature shot object, causing the monitoring camera to perform high-temperature alarm, resulting in false alarm of high-temperature alarm, and if the sun is monitored in the shot picture as the shot object for a long time, since the sun can be approximated as parallel light, when the sun falls onto the sensor of the monitoring camera after being converged by the lens of the monitoring camera, the long-time shooting may cause the optical filter of the relevant detector or sensor to be burned, so it is necessary to determine whether the position of the sun is in the shot picture.
Referring to fig. 2 and 3 together, fig. 2 is a schematic diagram illustrating a sun position of a high temperature monitoring method for preventing sun burn according to an embodiment of the present invention; fig. 3 is a schematic view of the high temperature monitoring method for preventing solar burn according to an embodiment of the present invention.
In this embodiment, the position information of the installation position of the monitoring camera and the time information during monitoring can be used to obtain the position of the sun, where the position of the sun is an included angle β between a connecting line between the center of the earth and the sun and the east on the equatorial plane, for example, when the installation position of the monitoring camera is on the equator, the sun seen at the monitoring camera is from the east horizon to the west horizon, i.e., from sunrise to sunset, and the angle covered by the sun is 180 °. Assuming that the daytime time of the day is 12 hours at this time, the sun rises at 6 am, the position of the sun at 6 am is 0 °, the position of the sun at 12 noon is 90 °, the position of the sun at 6 pm sunset is 180 °, and the time information is the time point when the monitoring camera monitors and shoots.
Specifically, to acquire the sun position, position information of a solar direct point is acquired first, and the solar direct point is a point where the incident angle of sunlight on the earth surface is 90 degrees and is an intersection point of a connecting line of the earth center and the sun center and the earth sphere. The activity rule of the direct sun-rays points is as follows: the direct sun-irradiation point is on the equator (0 degree) in spring equinox (around 21 months and 3 months), then moves to the north, the direct sun-irradiation point is on the return-to-north line (23 degree 26 'N) in summer to (around 22 months and 6 months), then moves to the south, the direct sun-irradiation point is on the equator (0 degree) in autumn (around 23 months and 9 days), then moves to the south, the direct sun-irradiation point is on the return-to-south line (23 degree 26' S) in winter to (around 22 months and 12 days), after that, the sun moves to the north, and the cycle is repeated, so that the sun can be seen to directly irradiate the north-return line and the south-return line respectively in summer solstice and winter solstice, the direct point of the sun moves between the north-south return lines in one year, according to the time of the monitoring camera, the time information of summer solstice and winter solstice in the next year can be set, the latitude position of the sun vertically irradiating on the ground is changed along with the revolution of the earth, and the position information of the sun direct point on any day in the year is A. 0sin (2 pi d/omega), wherein the position information of the direct solar point is an included angle A between a connecting line of the direct solar point and the center of the earth and the equatorial plane, d is the current calculation time of the day of the year, and the unit is day, A0Is the amplitude angle, i.e. the angle from the equator to the regression line; omega is the total days of one year at the bottom of the next year, and can be set to 365 days in the same year and 366 days in leap year according to specific years; when the position information of the monitoring camera is at latitude delta, an included angle between the latitude where the sun direct point is located and the latitude where the monitoring camera is located is delta-A, and an included angle alpha between a connecting line between the sun and the monitoring camera at 12 noon (at 12 noon, when the sun is at the highest point position in one day at the local time) and a ground plane where the monitoring camera is located is 90-delta + A. Because the sun is a large illuminant, the emitted light takes the angle of the earth as parallel light, and the radiation surface on the earth surface is not changed. Assuming that the earth is a regular sphere, taking the center of the earth as the origin, the latitude of the sun's direct point, i.e. the included angle A, is projected to the earthThe axis is the y-axis, in the coordinate plane that uses the equatorial plane as the x-axis, use pointing to the north pole direction as the y-axis positive direction, use the projection of the direction of crossing the earth centre of sphere pointing to the sun at the equatorial plane as the x-axis positive direction, obtain according to the latitude of solar direct point is contained angle A the distance of solar direct point to the earth axis with the first function y of the distance of solar direct point to the equatorial plane tan (90+ A) x, wherein y represents the height with the equatorial plane under the different latitude circumstances, x represents the distance to the earth axis, the earth axis is the earth rotation axis, the equatorial plane is the plane that the earth equator belongs to.
Further, taking the radius of the earth as R, the chord length R × cos δ corresponding to the position of the monitoring camera at the latitude δ and the distance h from the center of the sphere R × sin δ can be obtained as x R × sin δ/tan (90+ a) according to the first function y. The latitude δ chord length of the monitoring camera is divided into a ratio a, b (R × cos δ -R × sin δ/tan (90+ a)): R × cos δ + R × sin δ/tan (90+ a)), where a represents the chord length corresponding to the time of day and b represents the chord length corresponding to the time of night, i.e., the ratio of the time length of day to the time length of night at the location of the monitoring camera. According to the time length ratio of the time length of day to the time length of night of the monitoring camera, the time length of day of the monitoring camera can be obtained by calculation for 24 hours a day, the time length of day of the monitoring camera is divided into 180 degrees (observed by human eyes on the earth), and the position of the sun at any time of the sun in one day can be calculated, for example, if the lens of the monitoring camera faces south, the sun rises from east to west, the rising time t0 of the sun is 0 °, the falling time t1 of the sun is 180 °, the time length of day is 24a/(a + b), and the angle corresponding to any time t, namely the position β of the sun is (t-t0) × (180/(24a/(a + b))).
In another embodiment, in order to ensure that the sun is at the highest point position in one day at 12 am, the time of the monitoring camera needs to be corrected to the local standard time, the time of the monitoring camera can be manually set to be the time in a preset time zone, such as the time in the standard time zone of the installation position of the monitoring camera, for example, the beijing time, the united states time, and the like, and the camera time can be calibrated to the preset time zone.
In another embodiment, since the calculation of the sun position needs to refer to the north and south poles of the earth and the east and west directions, the camera can be further provided with a gradienter, a compass and other devices to calibrate the horizontal direction and the north direction of the camera.
Step S103: and when the position of the sun is in the shooting picture of the monitoring camera, the monitoring camera executes a protection measure for preventing the sun from being burnt.
Specifically, whether the sun position is in a picture shot by the monitoring camera is firstly judged according to physical parameters of the monitoring camera, wherein the physical parameters comprise the camera view angle, the lens focal length and the image sensor parameters; in this embodiment, when the sun is located in the shooting picture of the monitoring camera, the monitoring camera executes sun burn prevention measures, such as opening a camera blocking piece, switching an optical filter, opening a sunshade cover, and the like, and after the sun moves out of the shooting picture, the camera blocking piece and the sunshade cover can be closed and switched back to the original optical filter.
In order to prevent the monitoring camera from missing a high temperature alarm when the sun is positioned in the shooting picture of the monitoring camera, the high temperature monitoring method for preventing the sun from being burnt further comprises the following steps:
step S104: detecting the temperature of a shooting object in a shooting picture of the monitoring camera, and when the shooting object with the temperature higher than the preset temperature is detected to exist in the shooting picture, and when the sun position is not in the shooting picture of the monitoring camera, executing high-temperature alarm by the monitoring camera;
further, the monitoring camera shoots the hot infrared image to the monitoring environment, when there is the shooting object that the temperature is higher than the preset temperature in the hot infrared image of shooting, if this moment the sun position is not in the shooting picture of monitoring camera, then directly carry out high temperature alarm, preset the temperature and can artificially set up, can set up different preset temperatures according to the difference of monitoring environment, can set up preset temperature and be 45 degrees centigrade if the forest fire prevention control, the freezer control can set up preset temperature and be 0 degree centigrade.
Step S105: and when the sun position is in a shooting picture of the monitoring camera, acquiring the object position of the shooting object, and when the error between the object position and the sun position is greater than a threshold value, executing high-temperature alarm by the monitoring camera.
Specifically, when the sun position is in the shooting picture of the monitoring camera, the object position of the shooting object with the temperature higher than the preset temperature is acquired, and the object position of the shooting object in the shooting picture is recorded as the pixel point coordinate of the shooting object in the shooting picture of the camera. It should be noted that, only when the sun falls into the shooting picture of the monitoring camera, the monitoring camera detects that the shooting object with the temperature higher than the preset temperature is likely to be the sun, so before the high-temperature alarm is executed, it is necessary to determine whether the high-temperature shooting object is the sun, that is, determine whether the error between the object position and the sun position is greater than a threshold value, and execute the high-temperature alarm if the error is greater than the threshold value.
Specifically, if the sun position is in the camera image, the sun coordinate of the sun position in the camera image is calculated according to the sun position and the camera physical parameters, the sun coordinate is a pixel point coordinate of the sun in the image shot by the monitoring camera, and whether the error between the object position and the sun coordinate is greater than a threshold value is compared, and the threshold value can be set manually.
In this embodiment, when it is detected that the shooting object with the temperature higher than the preset temperature exists in the shooting picture and the error with the position of the sun is greater than the threshold value, a high-temperature alarm is directly performed.
According to the high-temperature monitoring method for preventing the sun from being burnt, the position information of the camera is obtained, the sun position is calculated according to the position information of the camera and the monitoring time information of the monitoring camera, and a burn prevention measure is executed when the sun position is in a shooting picture, so that the burn condition of the camera is avoided.
Further, when a shooting object with the temperature higher than the preset temperature is detected, the position of the sun is compared with the position of the high-temperature object to judge whether the high-temperature object is the sun or not, so that the accurate identification of the sun and the high-temperature object is realized, the high-temperature false alarm is avoided, and the alarm accuracy is improved;
furthermore, the sun position is obtained through the longitude and latitude of the installation position of the camera and the time information of the detected high-temperature object, the longitude and latitude and the time information are easy to obtain, the parameter error is small, the accuracy is high, and the calculation is simple.
Fig. 4 is a schematic structural diagram of a high-temperature monitoring device for preventing solar burns according to an embodiment of the present invention. As shown in fig. 4, the device includes a sun position obtaining module 21, a high temperature detecting module 22, a position comparing module 23, and an alarm and protection module 24.
A sun position obtaining module 21, configured to obtain position information of the surveillance camera, where the position information includes a longitude and a latitude of an installation position of the surveillance camera, and obtain a sun position according to the position information of the surveillance camera and time information monitored by the surveillance camera;
optionally, the sun position obtaining module 21 may be further configured to calculate and obtain a time length of a day of the installation position of the monitoring camera according to the position information of the monitoring camera, where the time length of the day is a time when the sun rises from the east and a time when the sun falls from the west of the installation position of the monitoring camera;
optionally, the sun position obtaining module 21 may be further configured to calculate and obtain a time length ratio of a day time length to a night time length of the installation position of the monitoring camera according to the position information of the monitoring camera;
optionally, the sun position obtaining module 21 may be further configured to obtain position information of the solar direct-radiation point according to the amplitude angle and the time information monitored by the camera;
the high temperature detection module 22 is configured to perform temperature detection on a photographic object in a photographic image of the surveillance camera, and when it is detected that a photographic object with a temperature higher than a preset temperature exists in the photographic image, obtain an object position of the photographic object, where the object position is a pixel point coordinate of the photographic object in the photographic image of the camera;
A position comparison module 23, configured to determine whether an error between the object position and the sun position is greater than a threshold;
the alarm and protection module 24 is used for executing a protection measure for preventing the sun from burning when the position of the sun is in a shooting picture of the monitoring camera; and when the sun position is not in the shooting picture of the monitoring camera and a high-temperature object is detected, the monitoring camera executes high-temperature alarm.
Optionally, the alarm and protection module 24 may be further configured to perform a high temperature alarm by the monitoring camera when the position of the sun is within the shooting screen of the monitoring camera and when an error between the position of the object of the high temperature shooting object and the position of the sun is greater than a threshold value.
The high-temperature monitoring device for preventing the sun from being burnt can be used for acquiring the position information of the camera, calculating the position of the sun according to the position information of the camera and the moment information when the shooting object with the temperature higher than the preset temperature is detected, comparing the position of the sun with the position of the high-temperature object to judge whether the high-temperature object is the sun or not, so that the sun is identified, anti-burning measures are executed when the sun is identified, the high-temperature false alarm is avoided, the alarm accuracy is improved, and the camera burning situation is avoided.
Referring to fig. 5, fig. 5 is a schematic structural diagram of a high temperature monitoring apparatus according to an embodiment of the invention. As shown in fig. 5, the upgrade apparatus 60 includes a processor 61 and a memory 62 coupled to the processor 61.
The memory 62 stores program instructions for implementing the solar burn prevention high temperature monitoring method of any of the above embodiments.
The processor 61 is operative to execute program instructions stored in the memory 62 to alarm the surveillance camera for high temperature surveillance against sun burn.
The processor 61 may also be referred to as a CPU (Central Processing Unit). The processor 61 may be an integrated circuit chip having signal processing capabilities. The processor 61 may also be a general purpose processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
Referring to fig. 6, fig. 6 is a schematic structural diagram of a memory device according to an embodiment of the invention. The storage device of the embodiment of the present invention stores a program file 71 capable of implementing all the above-mentioned solar burn prevention high temperature monitoring methods, wherein the program file 71 may be stored in the storage device in the form of a software product, and includes several instructions for enabling a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor (processor) to execute all or part of the steps of the methods according to the embodiments of the present application. The aforementioned storage device includes: various media capable of storing program codes, such as a usb disk, a mobile hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, or terminal devices, such as a computer, a server, a mobile phone, and a tablet.
In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other manners. For example, the above-described apparatus embodiments are merely illustrative, and for example, a division of a unit is merely a logical division, and an actual implementation may have another division, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit. The above embodiments are merely examples and are not intended to limit the scope of the present disclosure, and all modifications, equivalents, and flow charts using the contents of the specification and drawings of the present disclosure or those directly or indirectly applied to other related technical fields are intended to be included in the scope of the present disclosure.
Claims (10)
1. A high-temperature monitoring method for preventing sun burn is characterized by comprising the following steps:
acquiring position information of a monitoring camera, wherein the position information comprises longitude and latitude of an installation position of the monitoring camera;
obtaining the sun position according to the position information of the monitoring camera and the moment information monitored by the monitoring camera, wherein the sun position is an included angle between a connecting line of the earth center and the sun and the east on the equatorial plane, and the moment information is a time point when the monitoring camera monitors;
the obtaining the position of the sun according to the position information of the monitoring camera and the time information monitored by the monitoring camera includes:
calculating the daytime duration of the installation position of the monitoring camera according to the position information of the monitoring camera, wherein the daytime duration is the time when sunrise and sunset are observed at the monitoring camera;
calculating according to the daytime duration and the time information monitored by the monitoring camera to obtain the position of the sun;
and when the position of the sun is in the shooting picture of the monitoring camera, the monitoring camera executes a protection measure for preventing the sun from being burnt.
2. The method for monitoring high temperature for preventing solar burns according to claim 1, further comprising:
detecting the temperature of a shooting object in a shooting picture of the monitoring camera, and judging whether the position of the sun is in the shooting picture of the monitoring camera or not when the shooting object with the temperature higher than a preset temperature is detected to exist in the shooting picture;
when the sun position is not in the shooting picture of the monitoring camera, the monitoring camera executes high-temperature alarm;
when the sun position is in a shooting picture of the monitoring camera, acquiring an object position of the shooting object, wherein the object position is a pixel point coordinate of the shooting object in the shooting picture of the camera;
judging whether the error between the position of the object and the position of the sun is larger than a threshold value;
and when the error between the position of the object and the position of the sun is larger than a threshold value, the monitoring camera executes high-temperature alarm.
3. The method for monitoring high temperature to prevent solar burns according to claim 1, wherein determining whether the position of the sun is within the shooting picture of the monitoring camera comprises:
And judging whether the sun position is in the picture shot by the monitoring camera according to the physical parameters of the monitoring camera, wherein the physical parameters comprise the field angle, the focal length and the image sensor parameters of the monitoring camera.
4. The method for monitoring high temperature for preventing solar burns according to claim 2, wherein the step of judging whether the error between the position of the object and the position of the sun is larger than a threshold value comprises the following steps:
calculating the sun coordinate of the sun in the camera shooting picture according to the sun position and the physical parameters of the monitoring camera, wherein the sun coordinate is the pixel point coordinate of the sun in the camera shooting picture;
and comparing whether the error of the position of the object and the sun coordinate is larger than a threshold value.
5. The method for monitoring high temperature for preventing solar burns according to claim 1, wherein the calculating the time of day for obtaining the installation position of the monitoring camera according to the position information of the monitoring camera comprises:
calculating and obtaining the time length ratio of the daytime time length and the night time length of the installation position of the monitoring camera according to the position information of the monitoring camera;
And calculating and obtaining the daytime duration according to the duration ratio.
6. The method for monitoring high temperature to prevent solar burns according to claim 5, wherein the calculating the time length ratio of the time length of the monitoring camera at the installation position in the daytime to the time length of the monitoring camera at the night according to the position information of the monitoring camera comprises:
acquiring solar direct-radiation point information, and acquiring a first function of the distance from a solar direct-radiation point to a ground axis and the distance from the solar direct-radiation point to an equatorial plane according to the solar direct-radiation point information, wherein the solar direct-radiation point information is an included angle between a connecting line of the direct-radiation point and the center of the earth sphere and the equatorial plane, the solar direct-radiation point is a place with a sunlight incidence angle of 90 degrees on the surface of the earth, the ground axis is an earth rotation axis, and the equatorial plane is a plane where the equator of the earth is located;
and acquiring the time length ratio according to the first function and the position information of the monitoring camera.
7. The method for monitoring high temperature for preventing solar burns according to claim 6, wherein the acquiring information of the direct solar radiation point comprises:
and acquiring the position information of the solar direct point according to the amplitude angle and the time information monitored by the monitoring camera, wherein the amplitude angle is the angle from the equator to the regression line.
8. The method for monitoring high temperature for preventing solar burns according to claim 1, wherein before acquiring the position information of the monitoring camera, the method comprises:
correcting the shooting time of the monitoring camera to be below a preset time zone according to the preset time zone;
and calibrating the monitoring camera in the horizontal direction and the north-pointing direction.
9. A high temperature monitoring device comprising a processor, a memory coupled to the processor, wherein,
the memory stores program instructions for implementing a high temperature monitoring method for preventing solar burns according to any one of claims 1 to 8;
the processor is used for executing the program instructions stored in the memory to carry out high-temperature monitoring alarm on the object shot by the monitoring camera.
10. A storage device characterized by storing a program file capable of implementing the high temperature monitoring method for preventing solar burns according to any one of claims 1 to 8.
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| CN113063503B (en) * | 2021-03-17 | 2022-11-22 | 北京安酷智芯科技有限公司 | High-temperature target detection method and device based on detector |
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| CN114353954A (en) * | 2021-12-13 | 2022-04-15 | 浙江兆晟科技股份有限公司 | Method and system for preventing thermal infrared imager from being burnt by sun |
| CN114459606B (en) * | 2021-12-28 | 2023-03-21 | 北京波谱华光科技有限公司 | Thermal imager sun protection method and system, intelligent terminal and storage medium |
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