CN112863153A - Device and method for testing reaction time of photoelectric alarm system - Google Patents

Device and method for testing reaction time of photoelectric alarm system Download PDF

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Publication number
CN112863153A
CN112863153A CN202110003774.XA CN202110003774A CN112863153A CN 112863153 A CN112863153 A CN 112863153A CN 202110003774 A CN202110003774 A CN 202110003774A CN 112863153 A CN112863153 A CN 112863153A
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photoelectric
target
signal
alarm system
testing
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CN112863153B (en
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郑兴
李冠廷
黄剑雄
贺瑛攀
刘子骥
赵嘉学
梁志清
蒋亚东
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University of Electronic Science and Technology of China
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    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B29/00—Checking or monitoring of signalling or alarm systems; Prevention or correction of operating errors, e.g. preventing unauthorised operation
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E30/00—Energy generation of nuclear origin
    • Y02E30/30—Nuclear fission reactors

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  • Computer Security & Cryptography (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
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Abstract

The invention discloses a device and a method for testing the reaction time of a photoelectric warning system, wherein the testing device comprises a photoelectric target simulation device, a photoelectric warning system, a signal receiver and a high-speed camera; the photoelectric target simulation device is used for generating a simulated photoelectric target used for testing; the photoelectric warning system is a tested object, and needs to be capable of detecting and distinguishing a photoelectric target and outputting a warning signal after identifying the photoelectric target; the signal receiver is used for receiving and displaying the alarm signal; the high-speed camera is used for shooting and recording the appearance of the analog photoelectric target and the appearance of the alarm signal, and the computer is used for collecting and storing pictures shot by the high-speed camera. The invention realizes the accurate measurement of the reaction time of the photoelectric alarm system by calculating the time difference between the appearance of the analog photoelectric target and the appearance of the alarm signal, and provides a reliable basis for judging the performance of the photoelectric alarm system.

Description

Device and method for testing reaction time of photoelectric alarm system
Technical Field
The invention relates to the field of optical measurement, in particular to a device and a method for testing the reaction time of a photoelectric alarm system.
Background
The photoelectric guidance equipment is one of the most threatening equipment at present by relying on the characteristics of high hit precision, strong anti-electromagnetic interference capability and the like. Therefore, electro-optical countermeasure techniques and equipment for defense and countermeasure against electro-optical guidance equipment have become a focus of general attention and research in various countries. The primary steps of photoelectric countermeasure are photoelectric detection and alarm, and one aspect of photoelectric alarm as a photoelectric countermeasure technology is to utilize the photoelectric radiation characteristic of an object to perform passive detection alarm. The performance of the photoelectric alarm system directly reflects the ability of the enemy to acquire the information of the photoelectric equipment. As one of key performance indexes of the photoelectric alarm system, the reaction time directly determines the time for taking corresponding measures, and if the reaction time is too long, the timeliness and strategic significance of the photoelectric alarm system are influenced. Therefore, it is important to test the response time of the photoelectric alarm system.
The response time is defined as the difference between the time when the photoelectric warning system detects the target photoelectric information and the occurrence time of the warning signal, and is one of the key indexes for judging the performance of the photoelectric warning system.
Disclosure of Invention
The invention aims to solve the technical problem that the reaction time of a photoelectric alarm system is not measured in the prior art, and aims to provide a device and a method for testing the reaction time of the photoelectric alarm system, so that the problem of accurately measuring the reaction time of the photoelectric alarm system is solved.
The invention is realized by the following technical scheme:
a test device for response time of a photoelectric alarm system comprises a photoelectric target simulation device, the photoelectric alarm system, a signal display device and a high-speed camera device; the photoelectric target simulation equipment is used for simulating and generating a photoelectric target signal; the photoelectric warning system is used for detecting and identifying the photoelectric target signal and converting the photoelectric target signal into a warning signal; the signal display equipment is used for acquiring and displaying the alarm signal; the high-speed camera shooting device is used for shooting and recording the occurrence of the photoelectric target signal and the occurrence of the alarm signal.
The response time of the photoelectric alarm system is the difference value between the time when the photoelectric alarm system detects the target photoelectric information and the occurrence time of the alarm signal. The invention generates the appearance of the photoelectric target signal by the simulation of the photoelectric target simulation equipment, then displays the alarm signal generated by the photoelectric alarm system aiming at the appearance of the photoelectric target signal on the signal display equipment, places the appearance of the photoelectric target signal and the display of the alarm signal in the field of view of the same high-speed camera equipment, simultaneously carries out high-speed camera shooting and acquisition on the two signals (the photoelectric target signal and the alarm signal), and finally carries out analysis and judgment on the acquired picture. And obtaining the response time of the photoelectric alarm system through the time difference between the occurrence of the photoelectric target signal and the occurrence of the alarm signal. The testing device provided by the invention has the advantages of simple structure and strong practicability, realizes accurate measurement of the reaction time of the photoelectric alarm system, and provides a reliable basis for judging the performance of the photoelectric alarm system.
Furthermore, the photoelectric target simulation equipment comprises a surface light source and a target plate which are sequentially arranged, and the target plate can do plane motion relative to the surface light source.
Further, the surface light source is used for generating light waves and controlling radiation of the light waves, and the surface light source has uniform radiation intensity.
Furthermore, the target plate is made of opaque materials and used for blocking light waves from passing through, and small holes are formed in the target plate and used for the light waves to pass through.
Further, the system also comprises an image processing device which is used for collecting, processing and saving the pictures shot by the high-speed camera device.
Furthermore, the device also comprises a lifting table, and the high-speed camera shooting equipment is fixedly connected to the top of the lifting table. And the view field of the high-speed camera shooting equipment is adjusted through the lifting platform.
Further, the signal display device is an oscilloscope.
In another implementation manner of the present invention, a method for testing the response time of a photoelectric alarm system includes a signal display device connected to the photoelectric alarm system, and the method includes the following steps: step S1: the position where the photoelectric target signal appears and the display content of the signal display equipment are arranged in the same image acquisition field of view; step S2: when the photoelectric target signal is detected and recognized, a test target signal is formed, a test target alarm signal corresponding to the test target signal is generated at the same time, and the test target alarm signal is displayed on a signal display device in a graphic mode; step S3: shooting and recording the occurrence of the test target signal and the occurrence of the test target warning signal; step S4: and obtaining the response time of the photoelectric alarm system according to the time difference between the test target signal and the test target alarm signal.
Further, shooting and recording the occurrence of the photoelectric target signal and the occurrence of the alarm signal through a high-speed shooting device; simulating a photoelectric target signal through a surface light source and a target plate, wherein the target plate is provided with a small hole for light waves of the surface light source to pass through; the step S3 includes: enabling the high-speed camera shooting device to be in a shooting state, moving the target plate to enable the small hole to enter the radiation range of the surface light source, and stopping shooting when the display content of the signal display device appears in a waveform;
the step S4 includes: the reaction time T, T ═ N of the photoelectric warning system is obtained by the following formula2-N1) The initial frame number is N when the target plate rotates or translates to the edge of the surface light source radiation surface1When the display content of the signal display equipment has a waveform, the number of the calibration rising edge frames is N2And F is the frame rate.
Compared with the prior art, the invention has the following advantages and beneficial effects:
the invention has simple and practical structure and strong operability, is easy to achieve the test effect, makes accurate measurement aiming at the reaction time of the photoelectric alarm system and provides reliable basis for judging the performance of the photoelectric alarm system.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:
FIG. 1 is a schematic view of the general structure of the apparatus of the present invention;
fig. 2 is a view of a field of view of the high-speed image pickup apparatus;
FIG. 3 is a schematic structural view of example 2;
reference numbers and corresponding part names in the drawings:
1-surface light source, 2-target plate, 3-thermal radiation alarm system, 4-oscilloscope, 5-high speed camera, 6-optical lifting platform, 7-image processing computer.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not meant to limit the present invention.
Example 1
The embodiment 1 is a device for testing the response time of a photoelectric warning system, which comprises a photoelectric target simulation device, a photoelectric warning system, a signal receiver, a high-speed camera and an image processing computer;
the photoelectric target simulation device is used for generating a simulated photoelectric target used for testing, the simulated photoelectric target needs to have the appearance and disappearance processes, and the photoelectric alarm system can detect, distinguish and generate an alarm signal by simulating the appearance and disappearance of the photoelectric target; the photoelectric warning system is a tested object, and needs to be capable of detecting and distinguishing a photoelectric target and outputting a warning signal after identifying the photoelectric target; the signal receiver is used for receiving and displaying the alarm signal; the high-speed camera is used for shooting and recording the appearance of the analog photoelectric target and the appearance of the alarm signal, and the image processing computer is used for collecting, processing and storing pictures shot by the high-speed camera.
When the photoelectric target simulated by the photoelectric target simulation device appears, an obvious external mark is required to be used for judging the appearance time of the simulated photoelectric target.
When the photoelectric alarm system works, the photoelectric target simulation device needs to be placed in the visual field of the photoelectric target simulation device.
When a high-speed camera is used for shooting and recording, the photoelectric target simulation device and the signal receiver need to be simultaneously placed in the field of view of the high-speed camera.
The image processing computer needs to store the pictures shot by the high-speed camera frame by frame, and the higher the frame rate of the high-speed camera is, the higher the accuracy of the obtained alarm time is.
In this embodiment 1, the high-speed camera records the frame number of the picture where the photoelectric warning signal appears and the frame number of the picture where the warning signal appears, and the absolute value of the difference between the two frame numbers is divided by the frame frequency, so as to obtain the result of the response time of the photoelectric warning device. At the same time, the accuracy of the measured reaction time can be improved by increasing the frame rate of the high-speed camera.
The photoelectric target simulation device is composed of a surface light source and a target plate. The surface light source is used for generating and controlling light wave radiation, and an appropriate radiation wave band (or surface light source) and radiation intensity are selected according to requirements, and the radiation intensity of the radiation surface is uniform; the target plate needs to be made of a material capable of isolating the generated light waves, the material can enable the generated light wave radiation to be incapable of penetrating, small holes with certain apertures are formed in the target plate, the target plate can penetrate the light waves to form a simulation photoelectric target, the appearance, disappearance and moving processes of the simulation photoelectric target are controlled through the movement of the target plate, and the small holes must be guaranteed to move in the same plane all the time in the moving process of the target plate.
The signal receiver can be an oscilloscope or a general oscilloscope and is used for receiving the alarm signal generated by the photoelectric alarm system, before the test, the oscilloscope is set to be in a single trigger mode, and the trigger level is set to be lower than the peak voltage of the alarm signal, so that the waveform can be displayed after the alarm signal is received.
The optical lifting platform is further included, and the top of the optical lifting platform is fixedly connected with the high-speed camera. The light speed camera can simultaneously place the photoelectric target simulation device and the oscilloscope in a field of view by adjusting the height and the position of the optical lifting platform.
The steps of testing the response time of the photoelectric warning system by the testing device of the embodiment 1 are as follows:
installing a photoelectric target simulation device, a photoelectric warning system, a signal receiver and a high-speed camera, and connecting the high-speed camera and an image processing computer;
after the power is switched on, adjusting the position of the photoelectric alarm system to ensure that the photoelectric target simulation device is placed in the field of view; setting the radiation intensity of a surface light source according to a test environment to ensure that a photoelectric warning system can warn a simulated photoelectric target; the oscilloscope is set to be in a single trigger mode, and the trigger level is set to be lower than the peak voltage of the alarm signal, so that the waveform can be displayed after the alarm signal is received; adjusting the position and height of the high-speed camera to ensure that the oscilloscope photoelectric target simulation device is placed in the field of view of the oscilloscope, and simultaneously ensuring that an image processing computer can acquire, process and store pictures shot by the high-speed camera;
step three, enabling the high-speed camera to be in a shooting state, moving the target plate to enable the small holes to enter the radiation range of the surface light source, stopping shooting after the oscillograph displays the waveform, processing and storing the shot picture in the image processing computer, and calibrating the target plate to be the frame number N when the target plate rotates or translates to the edge of the radiation surface of the surface light source1Calibrating the number of rising edge frames to N when the signal receiver displays the waveform2By the formula T ═ N2-N1) The reaction time was calculated as/F.
Example 2
The present embodiment 2 is based on embodiment 1, and as shown in fig. 1, fig. 2 and fig. 3, a device for testing the reaction time of a thermal radiation alarm system includes a thermal radiation target simulation device, a thermal radiation alarm system 3, an oscilloscope 4, a high-speed camera 5, an optical lifting platform 6 and an image processing computer 7.
The heat radiation target simulation device comprises a surface light source 1 and a target plate 2 and is used for generating a simulated heat radiation target;
the thermal radiation alarm system 3 is used for detecting a simulated thermal radiation target and outputting an alarm signal to the oscilloscope 4;
the oscilloscope 4 is used for receiving and displaying the alarm signal output by the thermal radiation alarm system 3;
in this embodiment 2, the thermal radiation target simulation apparatus is installed in the fields of view of the thermal radiation alarm system 3 and the high-speed camera 5, the oscilloscope 4 is installed in the field of view of the high-speed camera 5, the oscilloscope is set to the single-shot mode, the trigger level is lower than the peak level of the alarm signal, the difference between the number of frames of the picture where the simulated thermal radiation target appears and the number of frames of the picture where the oscilloscope 4 displays the alarm signal is stored by the image processing computer 7, and the difference tests the response time of the thermal radiation alarm system.
The testing method of the testing device for the reaction time of the thermal radiation alarm system in the embodiment 2 comprises the following steps:
1. the device comprises a mounting surface light source 1, a target plate 2, a thermal radiation alarm system 3, an oscilloscope 4 and a high-speed camera 5, and is connected with the high-speed camera 5 and an image processing computer 7.
2. After the power is on, the surface light source 1 is set to be heated to a proper temperature, and after the heat radiation alarm system is started, the target plate 2 is rotated to ensure that the heat radiation alarm system 3 can alarm the simulated heat radiation target and the oscilloscope 4 can display alarm signals. The parameters such as the frame rate and the resolution of the high-speed camera 5 are set by using the image processing computer 7, a section of video is shot by using the high-speed camera 5, and the image processing computer 7 is ensured to store the pictures shot by the high-speed camera 5 frame by frame.
After the preparation, setting a high-speed camera 5 in a shooting state, moving the target plate 2 to enable the small hole to enter the radiation range of the surface source light source 1, stopping shooting after the oscilloscope 4 displays a waveform, storing the shot pictures frame by frame in the image processing computer 7, and calibrating the number of frames N when the target plate 2 rotates or translates to the edge of the radiation surface of the surface source light source 11Calibrating the number of rising edge frames to be N when the oscilloscope 4 displays the waveform2By the formula T ═ N2-N1) The reaction time was calculated as/F, the frame rate.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims (10)

1. A test device for response time of a photoelectric alarm system is characterized by comprising photoelectric target simulation equipment, the photoelectric alarm system, signal display equipment and high-speed camera equipment;
the photoelectric target simulation equipment is used for simulating and generating a photoelectric target signal;
the photoelectric warning system is used for detecting and identifying the photoelectric target signal and converting the photoelectric target signal into a warning signal;
the signal display equipment is used for acquiring and displaying the alarm signal;
the high-speed camera shooting device is used for shooting and recording the occurrence of the photoelectric target signal and the occurrence of the alarm signal.
2. The apparatus for testing response time of optoelectronic alarm system of claim 1, wherein said optoelectronic target simulation device comprises a surface light source and a target board, which are sequentially disposed, and said target board can perform planar motion with respect to said surface light source.
3. The apparatus for testing response time of optoelectronic alarm system as claimed in claim 2, wherein said surface light source is used for generating light wave and controlling radiation of the light wave, and said surface light source has uniform radiation intensity.
4. The apparatus for testing the response time of an optoelectronic alarm system of claim 3, wherein the target plate is made of opaque material for blocking the light wave from passing through, and the target plate is provided with small holes for the light wave to pass through.
5. The apparatus for testing the response time of a photoelectric warning system according to claim 1, further comprising an image processing device for capturing, processing and saving the pictures taken by the high-speed camera.
6. The apparatus for testing response time of an optoelectronic alarm system as claimed in claim 1, further comprising a lifting platform, wherein the high-speed camera device is fixedly connected to the top of the lifting platform.
7. The apparatus for testing the response time of a photoelectric alarm system of claim 1, wherein the signal display device is an oscilloscope.
8. A method for testing the response time of an optoelectronic alarm system, wherein the testing device of any one of claims 1 to 8 is used, and the method comprises the following steps:
step S1: the position where the photoelectric target signal appears and the display content of the signal display equipment are arranged in the same image acquisition field of view;
step S2: when the photoelectric target signal is detected and recognized, a test target signal is formed, a test target alarm signal corresponding to the test target signal is generated at the same time, and the test target alarm signal is displayed on a signal display device in a graphic mode;
step S3: shooting and recording the occurrence of the test target signal and the occurrence of the test target warning signal;
step S4: and obtaining the response time of the photoelectric alarm system according to the time difference between the test target signal and the test target alarm signal.
9. The method for testing the response time of the photoelectric warning system according to claim 8, wherein the occurrence of the photoelectric target signal and the occurrence of the warning signal are recorded by shooting with a high-speed camera; photoelectric target signals are simulated through the surface light source and the target plate, and the target plate is provided with small holes for light waves of the surface light source to pass through.
10. The method for testing the response time of the photoelectric alarm system of claim 9, wherein the step S3 comprises: enabling the high-speed camera shooting device to be in a shooting state, moving the target plate to enable the small hole to enter the radiation range of the surface light source, and stopping shooting when the display content of the signal display device appears in a waveform;
the step S4 includes: the reaction time T of the photoelectric alarm system is obtained by the following formula,
T＝(N2-N1)/F，
when the target plate rotates or translates to the edge of the surface light source radiation surface, the initial frame number is calibrated to be N1When the display content of the signal display equipment has a waveform, the number of the calibration rising edge frames is N2And F is the frame rate.
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