Rotating speed self-adaptive processing method and device for searching infrared thermal imager

Abstract

The embodiment of the invention relates to the technical field of search thermal infrared imagers, in particular to a rotating speed self-adaptive processing method of a search thermal infrared imager. Comprising the following steps: determining an image slope and first time of a triangular image stabilization signal for controlling an infrared lens to swing according to a standard slope and standard time at a standard rotating speed and a current rotating speed of a turntable; according to the known second time, calculating the duration time of the high-order voltage in the waveform of the trigger infrared video output signal; determining a signal period according to the rotating speed of the turntable; after the rotary table is at the zero position for a first time, a triangular image stabilization signal with determined parameters is sent to control the infrared lens to swing; and after the triangular image stabilization signal is sent for a second time, sending a triggering infrared video output signal with determined parameters to the infrared detection assembly. The embodiment of the invention provides a rotating speed self-adaptive processing method for searching an infrared thermal imager, which can realize self-adaption to different rotating speed image stabilization parameters.

Description

Technical Field

[0001] The embodiment of the present invention relates to the technical field of search infrared thermal imagers, and in particular to a rotation speed adaptive processing method of a search infrared thermal imager. Background Art

[0002] The infrared thermal imager of the infrared search system is installed on a turntable, and the search and detection of the airspace is realized by the rotation of the turntable. The third-generation area array staring infrared focal plane array (IRFPA) commonly used in infrared thermal imagers now has high sensitivity, good uniformity, and is easy to realize imaging detection, but it will cause image tailing problems when installed on a high-speed rotating turntable. This tailing will cause image blur, resulting in unclear imaging during high-speed rotation. Therefore, the infrared thermal imager used in the infrared search system adds a special image stabilization mechanism in the optical path to generate reverse swing compensation with the turntable rotation, eliminate image tailing, and realize clear infrared imaging. Because the compensation speed, control method and turntable speed of the image stabilization mechanism, the size of the image stabilization mechanism, and the design parameters of the optical system are coupled. At each speed, there is a set of different optimization parameters. Therefore, general search infrared thermal imagers are often used for image stabilization imaging at a fixed one or several fixed speeds. Image stabilization at different speeds cannot achieve adaptive adaptation of image stabilization parameters at different speeds by loading image stabilization parameters with different fixed parameters to the infrared thermal imager. Summary of the invention

[0003] The embodiment of the present invention provides a rotation speed adaptive processing method for searching an infrared thermal imager, which can realize the adaptation of image stabilization parameters at different rotation speeds.

[0004] In a first aspect, an embodiment of the present invention provides a method for adaptively processing a rotation speed of a search infrared thermal imager, comprising:

[0005] The image slope and the first time of the triangular image stabilization signal for controlling the swing of the infrared lens are determined according to the standard slope, the standard time and the current turntable speed at the standard speed; wherein the wave of the triangular image stabilization signal is composed of a plurality of groups of interconnected positive slope curves and negative slope curves, the image slope is the inverse of the slope of the positive slope curve and the slope of the negative slope curve, and the first time is the interval time from the turntable being at the zero position to the generation of the triangular image stabilization signal;

[0006] Calculating the duration of the high voltage in the trigger infrared video output signal waveform according to the known second time; wherein the waveform of the trigger infrared video output signal is a waveform in which the voltage oscillates between a fixed high level and a fixed low level;

[0007] The signal period is determined according to the rotation speed of the turntable; wherein the periods of the image stabilization signal and the trigger infrared video output signal are both the signal period;

[0008] After the turntable is at the zero position and the interval of the first time, the triangular image stabilization signal determined by the parameters is sent to control the swing of the infrared lens;

[0009] After the triangular image stabilization signal is sent for the second time, the trigger infrared video output signal determined by the parameters is sent to the infrared detection component.

[0010] In a second aspect, an embodiment of the present invention further provides a rotation speed adaptive processing device for searching an infrared thermal imager, which is used to implement any of the methods described in the above claims, wherein the device comprises an infrared lens, an infrared detection component, a swing mirror control board, a swing mirror drive board, and a power module;

[0011] The infrared lens is integrated with a swing mirror motor to achieve compensation and image stabilization under high-speed rotation;

[0012] The infrared detection component outputs an image according to the trigger infrared video output signal of the swing mirror control board, one pulse outputs one frame of image, the rising edge or falling edge trigger is effective, and the infrared operation of non-uniform correction is realized according to the control instruction forwarded by the swing mirror control board, and the functions such as lens focusing are realized at the same time;

[0013] The swing mirror driving board mainly realizes the rotation of the swing mirror motor according to the triangular image stabilization signal of the swing mirror control board;

[0014] The swing mirror control board is the main control circuit board, which realizes the forwarding of communication instructions of the infrared detection component. According to the system rotation speed and turntable zero position signal given in the instruction and the configured image stabilization parameters, the corresponding drive signal is parsed to achieve image stabilization matching the rotation speed. At the same time, the corresponding external trigger signal is output according to the rotation speed to achieve the matching of image output frame rate and rotation speed.

[0015] In a third aspect, an embodiment of the present invention further provides an electronic device, including a memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, the method described in any embodiment of this specification is implemented.

[0016] In a fourth aspect, an embodiment of the present invention further provides a computer-readable storage medium having a computer program stored thereon, which, when executed in a computer, enables the computer to execute the method described in any embodiment of this specification.

[0017] The embodiments of the present invention provide a rotation speed adaptive processing method, device, electronic equipment and storage medium for searching an infrared thermal imager.

[0018] In this embodiment, the rotation speed is collected in real time, and the image slope and the first time of the triangular image stabilization signal used to control the swing of the infrared lens are determined based on the standard slope and standard time at the known standard rotation speed. In addition, the signal period can be determined according to the turntable rotation speed. After determining the signal period, a determined triangular image stabilization signal can be obtained. After the first time of receiving the zero-position signal, the triangular image stabilization signal is output to control the swing of the infrared lens. After the second time after the triangular image stabilization signal is triggered, the second time is a known fixed time, and the trigger infrared video output signal is output. The high-level voltage duration of the trigger infrared video output signal can be obtained based on the peak value and trough value of the triangular image stabilization signal combined with the image slope and the second time, and its low-level voltage duration can be obtained by further combining the signal period. In this way, the effect of adaptive processing according to the turntable rotation speed is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is a timing diagram of a turntable zero position signal, image stabilization control and infrared triggering provided by an embodiment of the present invention;

[0021] Figure 2 It is a timing diagram for comparing clockwise and counterclockwise rotations provided by an embodiment of the present invention;

[0022] Figure 3 The present invention provides an adaptive infrared thermal imager according to an embodiment of the present invention. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0024] The specific implementation of the above concept is described below.

[0025] like Figure 1 As shown, an embodiment of the present invention provides a rotation speed adaptive processing method for searching an infrared thermal imager, the method comprising:

[0026] The image slope and the first time of the triangular image stabilization signal for controlling the swing of the infrared lens are determined according to the standard slope, the standard time and the current turntable speed at the standard speed; wherein the wave of the triangular image stabilization signal is composed of a plurality of groups of interconnected positive slope curves and negative slope curves, the image slope is the inverse of the slope of the positive slope curve and the slope of the negative slope curve, and the first time is the interval time from the turntable being at the zero position to the generation of the triangular image stabilization signal;

[0027] Calculating the duration of the high voltage in the trigger infrared video output signal waveform according to the known second time; wherein the waveform of the trigger infrared video output signal is a waveform in which the voltage oscillates between a fixed high level and a fixed low level;

[0028] The signal period is determined according to the rotation speed of the turntable; wherein the periods of the image stabilization signal and the trigger infrared video output signal are both the signal period;

[0029] After the turntable is at the zero position and the interval of the first time, the triangular image stabilization signal determined by the parameters is sent to control the swing of the infrared lens;

[0030] After the triangular image stabilization signal is sent for the second time interval, the trigger infrared video output signal determined by the parameters is sent to the infrared detection component.

[0031] In this embodiment, the rotation speed is collected in real time, and the image slope and the first time of the triangular image stabilization signal used to control the swing of the infrared lens are determined based on the standard slope and standard time at the known standard rotation speed. In addition, the signal period can be determined according to the turntable rotation speed. After determining the signal period, a determined triangular image stabilization signal can be obtained. After the first time of receiving the zero-position signal, the triangular image stabilization signal is output to control the swing of the infrared lens. After the second time after the triangular image stabilization signal is triggered, the second time is a known fixed time, and the trigger infrared video output signal is output. The high-level voltage duration of the trigger infrared video output signal can be obtained based on the peak value and trough value of the triangular image stabilization signal combined with the image slope and the second time, and its low-level voltage duration can be obtained by further combining the signal period. In this way, the effect of adaptive processing according to the turntable rotation speed is achieved.

[0032] Please refer to Figure 2 , in some embodiments of the present invention, further comprising:

[0033] According to the rotation direction of the turntable, the starting voltage value of the triangular image stabilization signal is determined:

[0034] If the turntable rotates clockwise, the starting voltage value of the triangular image stabilization signal is a valley value;

[0035] If the turntable rotates counterclockwise, the starting voltage value of the triangular image stabilization signal is the peak value.

[0036] In some embodiments of the present invention, the image slope is determined by the following formula:

[0037] k=k0|ω1| / ω0

[0038] Among them, ω0 is the standard speed, k0 is the standard slope, ω 1 is the rotation speed of the turntable, and k is the image slope.

[0039] In some embodiments of the present invention, the first time is determined by the following formula:

[0040] t1=t 10 ω0 / |ω1|

[0041] Among them, ω0 is the standard speed, t 10 is the standard time, ω 1 is the rotation speed of the turntable, and t1 is the first time.

[0042] Specifically, assuming that the rotation speed is 360° / s, the first time is t1=t 10 360° / |ω1|, the image slope is k=k0|ω1| / 360°, and the || symbol represents the absolute value of the rotation speed.

[0043] In some embodiments of the present invention, the duration of the high voltage in the trigger infrared video output signal waveform is determined by the following formula:

[0044] t≤(V1+V2) / k-t2

[0045] Wherein, t is the duration of the high voltage, V1 and V2 are the absolute value of the peak value and the absolute value of the trough value of the triangular image stabilization signal respectively, k is the image slope, and t2 is the second time.

[0046] In some embodiments of the present invention, determining the signal period according to the rotation speed of the turntable includes:

[0047] Determining the frame rate of the trigger infrared video output signal according to the rotation speed of the turntable and the horizontal field angle of the infrared thermal imager;

[0048] The reciprocal of the frame rate is the signal period.

[0049] The frame rate is determined by the following formula:

[0050]

[0051] Where N is the frame rate, ω 1 is the rotation speed of the turntable, and θ is the horizontal field of view of the infrared thermal imager. It means taking the absolute value of the result and rounding it up.

[0052] In this embodiment, the frame rate can be any value that satisfies the above formula, preferably close to The value of .

[0053] like Figure 3 As shown, an embodiment of the present invention provides a rotational speed adaptive processing device for searching infrared thermal imagers. The device embodiment can be implemented by software, or by hardware or a combination of software and hardware. From a hardware perspective, a hardware architecture diagram of an electronic device in which a rotational speed adaptive processing device for searching infrared thermal imagers provided in an embodiment of the present invention is located, in addition to a processor, memory, network interface, and non-volatile memory, the electronic device in the embodiment where the device is located can generally include other hardware, such as a forwarding chip responsible for processing messages, etc. Taking software implementation as an example, as a device in a logical sense, it is formed by the CPU of the electronic device in which it is located reading the corresponding computer program in the non-volatile memory into the memory for execution. A rotational speed adaptive processing device for searching infrared thermal imagers provided in this embodiment includes:

[0054] Infrared lens, infrared detection component, swing mirror control board, swing mirror drive board and power module;

[0055] The infrared lens is integrated with a swing mirror motor to achieve compensation and image stabilization under high-speed rotation;

[0056] The infrared detection component outputs an image according to the trigger infrared video output signal of the swing mirror control board, one pulse outputs one frame of image, the rising edge or falling edge trigger is effective, and the infrared operation of non-uniform correction is realized according to the control instruction forwarded by the swing mirror control board, and the functions such as lens focusing are realized at the same time;

[0057] The swing mirror driving board mainly realizes the rotation of the swing mirror motor according to the triangular image stabilization signal of the swing mirror control board;

[0058] The swing mirror control board is the main control circuit board, which realizes the forwarding of communication instructions of the infrared detection component. According to the system rotation speed and turntable zero position signal given in the instruction and the configured image stabilization parameters, the corresponding drive signal is parsed to achieve image stabilization matching the rotation speed. At the same time, the corresponding external trigger signal is output according to the rotation speed to achieve the matching of image output frame rate and rotation speed.

[0059] It is to be understood that the structure illustrated in the embodiment of the present invention does not constitute a specific limitation on a rotation speed adaptive processing device for a search infrared thermal imager. In other embodiments of the present invention, a rotation speed adaptive processing device for a search infrared thermal imager may include more or fewer components than shown in the figure, or combine some components, or split some components, or arrange the components differently. The components shown in the figure may be implemented in hardware, software, or a combination of software and hardware.

[0060] The information interaction, execution process and other contents between the modules in the above-mentioned device are based on the same concept as the embodiment of the method of the present invention. For specific contents, please refer to the description in the embodiment of the method of the present invention, and no further description is given here.

[0061] An embodiment of the present invention further provides an electronic device, including a memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, a rotation speed adaptive processing method for searching an infrared thermal imager in any embodiment of the present invention is implemented.

[0062] An embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the processor executes a rotation speed adaptive processing method for searching an infrared thermal imager in any embodiment of the present invention.

[0063] Specifically, a system or device equipped with a storage medium can be provided, on which software program code that implements the functions of any of the above-mentioned embodiments is stored, and a computer (or CPU or MPU) of the system or device can be enabled to read and execute the program code stored in the storage medium.

[0064] In this case, the program code itself read from the storage medium can realize the function of any one of the above-mentioned embodiments, and thus the program code and the storage medium storing the program code constitute a part of the present invention.

[0065] The storage medium embodiments for providing the program code include a floppy disk, a hard disk, a magneto-optical disk, an optical disk (such as CD-ROM, CD-R, CD-RW, DVD-ROM, DVD-RAM, DVD-RW, DVD+RW), a magnetic tape, a non-volatile memory card, and a ROM. Alternatively, the program code can be downloaded from a server computer by a communication network.

[0066] In addition, it should be clear that the functions of any of the above embodiments can be implemented not only by executing the program code read by the computer, but also by enabling an operating system operating on the computer to complete part or all of the actual operations based on instructions from the program code.

[0067] In addition, it can be understood that the program code read from the storage medium is written to a memory provided in an expansion board inserted into the computer or to a memory provided in an expansion module connected to the computer, and then based on the instructions of the program code, a CPU installed on the expansion board or expansion module is enabled to perform part or all of the actual operations, thereby realizing the functions of any of the above-mentioned embodiments.

[0068] It should be noted that, in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "comprise a ..." do not exclude the presence of other identical factors in the process, method, article or device including the elements.

[0069] A person of ordinary skill in the art can understand that all or part of the steps of implementing the above method embodiments can be completed by hardware related to program instructions, and the aforementioned program can be stored in a computer-readable storage medium. When the program is executed, it executes the steps of the above method embodiments; and the aforementioned storage medium includes: ROM, RAM, magnetic disk or optical disk, etc., various media that can store program codes.

[0070] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A speed adaptive processing method for searching an infrared thermal imager, characterized in that: include: The image slope and the first time of the triangular image stabilization signal for controlling the swing of the infrared lens are determined according to the standard slope, the standard time and the current turntable speed at the standard speed; wherein the wave of the triangular image stabilization signal is composed of a plurality of groups of interconnected positive slope curves and negative slope curves, the image slope is the inverse of the slope of the positive slope curve and the slope of the negative slope curve, and the first time is the interval time from the turntable being at the zero position to the generation of the triangular image stabilization signal; Calculating the duration of the high voltage in the trigger infrared video output signal waveform according to the known second time; wherein the waveform of the trigger infrared video output signal is a waveform in which the voltage oscillates between a fixed high level and a fixed low level; The signal period is determined according to the rotation speed of the turntable; wherein the periods of the image stabilization signal and the trigger infrared video output signal are both the signal period; After the turntable is at the zero position and the interval of the first time, the triangular image stabilization signal determined by the parameters is sent to control the swing of the infrared lens; After the triangular image stabilization signal is sent for the second time interval, the trigger infrared video output signal determined by the parameters is sent to the infrared detection component.

2. The method according to claim 1, characterized in that Also includes: According to the rotation direction of the turntable, the starting voltage value of the triangular image stabilization signal is determined: If the turntable rotates clockwise, the starting voltage value of the triangular image stabilization signal is a valley value; If the turntable rotates counterclockwise, the starting voltage value of the triangular image stabilization signal is the peak value.

3. The method according to claim 1, characterized in that: The image slope is determined by the following formula: k=k0|ω1| / ω0 Among them, ω0 is the standard rotation speed, k0 is the standard slope, ω1 is the turntable rotation speed, and k is the image slope.

4. The method according to claim 1, characterized in that The first time is determined by the following formula: t1=t 10 ω0 / |ω1| Among them, ω0 is the standard speed, t 10 is the standard time, ω1 is the turntable speed, and t1 is the first time.

5. The method according to claim 1, characterized in that The duration of the high voltage in the trigger infrared video output signal waveform is determined by the following formula: t≤(V1+V2) / k-t2 Wherein, t is the duration of the high voltage, V1 and V2 are the absolute value of the peak value and the absolute value of the trough value of the triangular image stabilization signal respectively, k is the image slope, and t2 is the second time.

6. The method according to claim 1, characterized in that Determining the signal period according to the rotation speed of the turntable includes: Determining the frame rate of the trigger infrared video output signal according to the rotation speed of the turntable and the horizontal field angle of the infrared thermal imager; The reciprocal of the frame rate is the signal period.

7. The method according to claim 6, characterized in that The frame rate is determined by the following formula: N ≥ [ω1 / θ] Where N is the frame rate, ω1 is the rotation speed of the turntable, and θ is the horizontal field of view of the infrared thermal imager.

8. A rotation speed adaptive processing device for searching infrared thermal imagers, characterized in that: Used to implement the method described in any one of claims 1 to 7, the device comprises an infrared lens, an infrared detection component, a swing mirror control board, a swing mirror drive board and a power module; The infrared lens is integrated with a swing mirror motor to achieve compensation and image stabilization under high-speed rotation; The infrared detection component outputs an image according to the trigger infrared video output signal of the swing mirror control board, one pulse outputs one frame of image, the rising edge or falling edge trigger is effective, and the infrared operation of non-uniform correction is realized according to the control instruction forwarded by the swing mirror control board, and the functions such as lens focusing are realized at the same time; The swing mirror driving board mainly realizes the rotation of the swing mirror motor according to the triangular image stabilization signal of the swing mirror control board; The swing mirror control board is the main control circuit board, which realizes the forwarding of communication instructions of the infrared detection component. According to the system rotation speed and turntable zero position signal given in the instruction and the configured image stabilization parameters, the corresponding drive signal is parsed to achieve image stabilization matching the rotation speed. At the same time, the corresponding external trigger signal is output according to the rotation speed to achieve the matching of image output frame rate and rotation speed.

9. An electronic device, comprising a memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, the method according to any one of claims 1 to 7 is implemented.

10. A computer-readable storage medium having a computer program stored thereon, which, when executed in a computer, causes the computer to execute the method according to any one of claims 1 to 7.

Images