Photoelectric turntable speed adaptive control method

Abstract

A photoelectric turntable speed adaptive control method mainly comprises the following steps: fitting a corresponding mathematical calculation formula based on a plurality of groups of common corresponding relationships between focal length values of photoelectric equipment and turntable speed in different fields of view; acquiring a current focal length value of the photoelectric equipment; and substituting the obtained focal length value into a formula obtained by fitting, calculating the movement speed of the photoelectric turntable, and sending the movement speed to turntable control equipment to operate at the speed. The method is simple and convenient in calculation, the image can be kept basically stable when the field of view of the photoelectric equipment changes in real time, and the observation efficiency of field users is improved.

Description

Technical Field

[0001] The invention relates to the technical field of photoelectric control, and in particular to a photoelectric turntable speed adaptive control method. Background Art

[0002] With the continuous improvement and development of my country's border defense monitoring system, the photoelectric turntable has important research value as the front-end observation equipment of the monitoring system. The photoelectric turntable has a long observation distance, can be monitored all day long, and has two-way images of visible light and infrared for back-end personnel to observe. In actual use, back-end personnel often need to constantly monitor targets at different distances, so the field of view of television and infrared changes at any time. However, the speed of the photoelectric turntable is usually not adjusted automatically, which will result in the need to manually increase the speed of the turntable when the infrared field of view of the television is large, and manually reduce the speed of the turntable when the infrared field of view of the television is small, in order to obtain a clear and stable video image. This will greatly increase the operating burden of the user, thereby affecting the monitoring of the system. Therefore, ensuring the stability and clarity of the photoelectric turntable image when the infrared field of view of the television changes is of great significance for reconnaissance of the surrounding environment and rapid response and handling of emergencies. Summary of the invention

[0003] Aiming at the problem that when a photoelectric turntable observes a video image in the field of view of a television infrared sensor, a constant turntable speed cannot satisfy the need to obtain a clear and stable video image when adjusting the field of view size of the television infrared sensor, the present invention provides a photoelectric turntable speed adaptive control method.

[0004] The present disclosure provides a method for adaptively controlling the speed of a photoelectric turntable, comprising:

[0005] The current focal length value is fed back through the photoelectric device, and the feedback focal length value is filtered and error processed using the FIR digital filtering algorithm;

[0006] Based on the focal length values ​​of sensors under different fields of view provided by optoelectronic equipment manufacturers and the empirical turntable speed, the speed formula of optoelectronic turntable-focal length is fitted;

[0007] The focal length obtained by filtering is substituted into the formula to calculate the optimal speed of the turntable rotation, and sent to the turntable control device to run at this speed.

[0008] Compared with the prior art, the beneficial effects of the present invention are: 1) when the infrared field of view of the television changes in real time, the image can be kept basically stable; 2) the corresponding formula of focal length and speed is fitted by MATLAB algorithm, which is simple to calculate; 3) the observation efficiency of on-site users is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] The above and other objects, features and advantages of the present disclosure will become more apparent through a more detailed description of exemplary embodiments of the present disclosure in conjunction with the accompanying drawings, wherein like reference numerals generally represent like components throughout the exemplary embodiments of the present disclosure.

[0010] Figure 1 The present invention provides a workflow for maintaining a stable image of an optoelectronic turntable when the field of view changes in real time according to an exemplary embodiment of the present disclosure. DETAILED DESCRIPTION

[0011] The preferred embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the preferred embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to make the present disclosure more thorough and complete, and to fully convey the scope of the present disclosure to those skilled in the art.

[0012] The present disclosure provides a method for adaptively controlling the speed of an optoelectronic turntable. The flowchart of an exemplary embodiment is shown in the attached figure. Figure 1 As shown, the following steps are included:

[0013] 1. Connect the serial port cables of the TV and infrared sensor to the photoelectric turntable control board, and receive the focal length value fed back by the TV infrared through the serial port according to the communication protocol.

[0014] 2. Input the received focal length value into the FIR digital filter for filtering.

[0015] 3. Based on the focal length values ​​of the TV infrared sensor under different fields of view provided by the manufacturer and the empirical rotation speed of the photoelectric turntable, the MATLAB algorithm is used to fit the best corresponding mathematical formula.

[0016] First, determine the more appropriate movement speed of the turntable at different focal lengths based on actual usage, and then perform fitting; for the same device, the smaller the field of view, the smaller the image display range, and too fast movement affects image observation; the larger the field of view, the larger the image display range, allowing the turntable speed to be faster.

[0017] The corresponding relationship between the focal length and the turntable commonly used in this embodiment is as follows:

[0018] Focal length(mm) 10 100 185 270 360 450 540 625 710 800 Speed(° / s) 20 15 12 9 7 5 3 2 0.8 0.5

[0019] With the focal length as x and the speed as y, the relationship between them is fitted as follows:

[0020] y=ax 3 +bx 2 +cx+d

[0021] In the formula: a=-1.826e-08; b=5.064e-05; c=-0.0536, d=20.28.

[0022] 4. Substitute the filtered TV infrared focal length value into the formula, calculate the movement speed of the photoelectric turntable, and send it to the controller to control the turntable to run at that speed.

[0023] The above technical scheme is only an exemplary embodiment of the present invention. For those skilled in the art, it is easy to make various types of improvements or modifications based on the application methods and principles disclosed in the present invention, and it is not limited to the method described in the above specific embodiment of the present invention. Therefore, the method described above is only preferred and does not have a restrictive meaning.

Claims

1. A method for adaptively controlling the speed of a photoelectric turntable, comprising the following steps: S1, based on several sets of commonly used corresponding relationships between the focal length value of the optoelectronic device and the turntable speed under different fields of view, the corresponding mathematical calculation formula is fitted; S2, obtaining the current focal length value of the optoelectronic device; S3, substituting the acquired focal length value into the formula obtained in step S1, calculating the movement speed of the photoelectric turntable, and sending it to the turntable control device to run at the speed.

2. The method according to claim 1, characterized in that The corresponding relationship in step S1 include: 。 3. The method according to claim 1, characterized in that The mathematical formula fitted in step S1 includes: With focal length as x and speed as y, the relationship between them is: y=ax 3 +bx 2 +cx+d In the formula: a=-1.826e-08; b=5.064e-05; c=-0.0536, d=20.

28.

4. The method according to claim 1, characterized in that: The method for obtaining the current focal length value of the optoelectronic device in step S2 is: The serial port line of the optoelectronic device is connected to the optoelectronic turntable control board, and the focal length value fed back by the optoelectronic device is received through the serial port according to the communication protocol.

5. The method according to any one of claims 1 to 4, characterized in that: The optoelectronic device adopts a television or an infrared sensor.

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