CN102519585A - Apparatus for detecting strong-laser long distance surface intensity - Google Patents

Abstract

A device for detecting the long-distance surface intensity of strong laser belongs to the field of laser technology. The data measured by the prior art are not accurate enough, and can only be measured indoors, and the test results lack practical significance. The present invention is characterized in that several energy probes in the energy detection system are evenly distributed on the diffuse reflection target plate, and the data transmitter in the energy detection system is in a wireless communication relationship with the data and image receiver; the imaging system is located on the diffuse reflection target In the distance in front of the board, the CCD camera in the imaging system aims at the diffuse reflection target board, the image transmitter in the imaging system and the data and image receiver have a wired communication relationship, the synchronization signal receiver and the synchronization controller in the imaging system There is a wireless communication relationship between them; the data and image receiver, and the synchronization controller are all connected to the computer by wire. The invention is suitable for long-distance and complex terrain detection in the field, and has very high test accuracy.

Description

A device for detecting the intensity of a long-distance surface of a strong laser

technical field

The invention relates to a device for detecting the long-distance surface intensity of a strong laser, which can obtain the surface intensity data after the strong laser beam is transmitted through the long-distance atmosphere, and belongs to the field of laser technology.

Background technique

In the fields of laser ranging, communication, and laser weapons, laser beams propagate long distances in the outdoor atmosphere. The surface intensity of the beam at the end of the propagation is an important parameter of the laser. How to test this parameter has become a technical problem that needs to be solved in this field. A Chinese patent application with the application number 02114632.2 discloses a scheme called "on-line high-energy laser energy and optical power density space-time distribution measurement system", which can online measure the high-energy laser optical power density with time and space. , the total energy value can also be obtained by calculation. This system is especially suitable for continuous wave high-energy lasers in the infrared band such as deuterium fluoride and oxygen iodine with large spot area, short luminous time, high output energy and power density, and can also be used for continuous wave lasers with high power density such as carbon dioxide and YAG. . However, the measured data are not accurate enough, and can only be measured indoors, and the test results lack practical significance.

Contents of the invention

The purpose of the present invention is to realize the high-precision test of the surface density of the strong laser after long-distance atmospheric transmission, and the test can be carried out in the field. For this reason, we have invented a device for detecting the long-distance surface intensity of the strong laser.

The device for detecting the long-distance surface intensity of strong laser of the present invention is characterized in that several energy probes in the energy detection system are evenly distributed on the diffuse reflection target plate, and the distance between the data transmitter and the data and image receiver in the energy detection system is Wireless communication relationship; the imaging system is located far in front of the diffuse reflection target, the CCD camera in the imaging system is aimed at the diffuse reflection target, the image transmitter in the imaging system and the data and image receiver have a wired communication relationship, the imaging system The synchronous signal receiver and the synchronous controller are in a wireless communication relationship; the data and image receiver, and the synchronous controller are all wired to the computer.

The technical effect of the device for detecting the long-distance surface intensity of strong laser light of the present invention is that the computer controls the synchronous controller to work, and the synchronous controller sends synchronous signals to the tested laser and the imaging system in a wireless manner, so the tested laser emits strong laser light for a long time. The distance travels through the atmosphere to irradiate the diffuse reflection target plate, and the imaging system synchronously captures the image of the strong laser spot on the diffuse reflection target plate, and sends it to the data and image receiver. A number of energy probes in the energy detection system detect a number of energy values related to the laser intensity around the strong laser spot, and send them to the data and image receiver. The data and image receiver transmits the received image signal and energy value to the computer. On the one hand, the computer regards the image signal as grayscale data, and on the other hand, obtains the laser intensity from the energy value. Since these energy values come from different positions of the intense laser spot, the image gray levels of the strong laser spot at these positions are different, so that the laser intensity corresponding to the different gray levels of the strong laser spot image can be obtained. According to this relationship, the computer obtains the laser intensity corresponding to each place of the strong laser spot image, and thus also obtains the surface intensity of the strong laser. Because many components in the device of the present invention work wirelessly, the device of the present invention can be suitable for long-distance and complex terrain detection in the field, for example, the distance between the tested laser and the diffuse reflection target plate can reach more than 1000 meters, and the imaging system and Diffuse reflectance targets can reach distances up to 200 meters. In addition, the detection accuracy of the device of the present invention depends on the detection accuracy of the energy probe and the resolution of the CCD camera, and the existing technology in this regard is sufficient to ensure the required accuracy and resolution. Therefore, the detection accuracy of the device of the present invention is very high. high.

Description of drawings

Fig. 1 is a schematic diagram of the structure and working state of the device for detecting the intensity of the long-distance surface of a strong laser according to the present invention, which is also used as a summary drawing. Fig. 2 is a schematic diagram of the structure and working state of the synchronous controller in the device for detecting the intensity of the long-distance surface of the strong laser according to the present invention.

Detailed ways

The device for detecting the intensity of a long-distance surface of a strong laser according to the present invention is implemented in the following manner. As shown in Fig. 1, a number of energy probes 1 in the energy detection system are evenly distributed on the diffuse reflection target plate 2, the number of energy probes 1 is 3 to 9, and the diffuse reflection target plate 2 adopts a Lambertian radiator. The data transmitter 3 and the data and image receiver 4 in the energy detection system are in a wireless communication relationship, such as microwave communication. The imaging system is located far in front of the diffuse reflection target plate 2, and the distance between the imaging system and the diffuse reflection target plate 2 is 150-250 meters. The CCD camera 5 in the imaging system is aimed at the diffuse reflection target plate 2. Since the energy probe 1 is small in size, the image it forms in the imaging system is smaller than one pixel, which does not affect the image quality of the strong laser spot taken by the CCD camera 5. The image transmitter 6 and the data and image receiver 4 in the imaging system are in a wired communication relationship, such as optical fiber communication. The synchronization signal receiver 7 and the synchronization controller 8 in the imaging system are in a wireless communication relationship, such as GPS-B code communication. Both the data and image receiver 4 and the synchronous controller 8 are wired with the computer 9 . The data and image receiver 4 stores the received strong laser spot image signal and the energy values of some feature points in the computer 9, and the computer 9 performs data processing, and according to the gray of the strong laser spot on the surface of the diffuse reflection target plate 2 The energy density value of any point on the strong laser spot can be calculated according to the intensity distribution and the energy value of several feature points, and the energy density value is fitted with the gray value of the strong laser spot image to obtain the energy density distribution, and finally Get the surface strength. In the synchronous controller 8, the counting module, the GPS time statistics module, and the control module are electrically connected to each other by wires, as shown in Figure 2, the GPS time statistics module provides the synchronous controller 8 work start time, and the counting module records the synchronous controller 8 times of work. The communication relationship between the control module and the synchronization signal receiver 7 in the imaging system and the tested laser 10 is GPS-B code. The control module emits a unified timing signal and trigger signal to realize the dynamic acquisition of strong laser spot images. The tested laser 10 is a pulsed laser or a continuous laser, and the emission distance and beam spread angle of the strong laser are not limited.

Claims (8)

1. A device for detecting strong laser long-distance surface intensity is characterized in that, some energy probes in the energy detection system are evenly distributed on the diffuse reflection target plate, and the data transmitter in the energy detection system and the data and the image receiver There is a wireless communication relationship between them; the imaging system is located far in front of the diffuse reflection target, the CCD camera in the imaging system is aimed at the diffuse reflection target, and the image transmitter and data and image receiver in the imaging system have a wired communication relationship. The synchronous signal receiver and the synchronous controller in the imaging system are in a wireless communication relationship; the data and image receiver and the synchronous controller are all connected to the computer by wire. 2. The device for detecting the intensity of a long-distance surface of a strong laser according to claim 1, characterized in that the number of energy probes (1) is 3 to 9. 3. The device for detecting the long-distance surface intensity of strong laser light according to claim 1, characterized in that the diffuse reflection target plate (2) adopts a Lambertian radiator. 4. The device for detecting the intensity of a long-distance surface of strong laser light according to claim 1, characterized in that, the data transmitter (3) in the energy detection system and the data and image receiver (4) are in a microwave communication relationship. 5. The device for detecting the intensity of a long-distance surface of a strong laser according to claim 1, characterized in that the distance between the imaging system and the diffuse reflection target (2) is 150-250 meters. 6. The device for detecting the intensity of a long-distance surface of strong laser light according to claim 1, characterized in that the optical fiber communication relationship is between the image transmitter (6) and the data and image receiver (4) in the imaging system. 7. The device for detecting strong laser long-distance surface intensity according to claim 1, characterized in that, the GPS-B code communication relationship between the synchronous signal receiver (7) and the synchronous controller (8) in the imaging system . 8. The device for detecting the intensity of the long-distance surface of strong laser light according to claim 1, characterized in that, in the synchronous controller (8), the counting module, the GPS timing module, and the control module are electrically connected to each other by wire.

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