Platform type laser semi-active seeker frame angle zero error calibration device and calibration method

Abstract

The invention relates to a platform type laser semi-active seeker frame angle zero error calibration device and calibration method, and belongs to the field of seeker calibration. Comprising an L-shaped seeker calibration tool (1) and a laser receiving assembly (2), the calibration method comprises the steps of laser receiving assembly installation, laser irradiator posture adjustment, seeker installation and frame angle zero error recording and correction, operation is easy, all used equipment is seeker testing equipment, and the calibration device has the advantages of being simple in structure, high in robustness and convenient to manufacture and can be obtained by improving a seeker testing tool. By using the alignment calibration device and the alignment calibration method, the alignment calibration of the zero error of the frame angle can be quickly and conveniently realized in a seeker function performance test environment, and the alignment calibration result is reliable.

Description

Technical Field

[0001] This invention belongs to the field of seeker calibration, specifically relating to a platform-type laser semi-active seeker frame angle zero-position error calibration device and calibration method. Background Technology

[0002] Currently, the zero-position calibration of the frame angle of a platform-type laser semi-active seeker typically involves calibrating the frame platform's line-of-sight error to ensure the sensor's line-of-sight is orthogonal to the frame platform's mounting base, thereby eliminating orthogonality errors. This can be achieved using tools such as a theodolite, reflector, and indexing turntable. Based on the autocollimation principle, the azimuth and pitch deviations of the sensor at the frame platform's zero position are measured, and the sensor's mounting position is adjusted accordingly. This method requires numerous calibration and measurement tools, and the installation and implementation process is quite cumbersome. Alternatively, specific fixtures can be designed to fix the seeker housing, frame platform, and calibration optical tube. However, this method cannot achieve zero-position calibration of the entire seeker frame angle, and the specific fixture structure is also quite complex. Summary of the Invention

[0003] (a) Technical problems to be solved The technical problem to be solved by the present invention is how to provide a platform-type laser semi-active seeker frame angle zero-position error calibration device and calibration method, which can quickly and conveniently achieve frame angle zero-position error calibration in the seeker functional performance test environment.

[0004] (II) Technical Solution To solve the above-mentioned technical problems, the present invention proposes a platform-type laser semi-active seeker frame angle zero-position error calibration device, comprising: an L-shaped seeker calibration fixture 1 and a laser receiving component 2; The L-shaped guide head calibration fixture 1 includes two mounting plates that are fixedly connected perpendicularly to each other, namely a fixed base plate 4 and a vertical mounting plate; The front surface of the vertical mounting plate is set as a mounting plane 3 for the guide head or laser receiving component. A guide head cable passage hole 5 is opened at the center of the mounting plane 3. The laser receiving component 2 is fixed on the mounting plane 3. The laser receiving assembly 2 includes: a laser detection device 6, a laser detection device mounting plate 7, and a laser detection device fixing plate 8; The laser detection device mounting plate 7 has a laser detection device cable passage hole 9, and laser detection device fixing brackets 10 are provided on both sides of the laser detection device cable passage hole 9. The laser detection device 6 is fixed to the laser detection device mounting bracket 10 by the laser detection device mounting plate 8; During the frame angle zero position error calibration process, the L-shaped guide head calibration fixture 1 is fixed on the guide head test platform, the laser detection device 6 is clipped onto the laser detection device fixing bracket 10 through the laser detection device fixing plate 8, and the laser detection device fixing plate 8 is fixed. The communication and power cables of the laser detection device 6 are thrown out through the laser detection device cable through hole 9 and connected to the control host computer. The attitude of the laser irradiator is adjusted according to the deviation angle fed back by the laser detection device 6 to ensure that the positions of the L-shaped guide head calibration fixture 1 and the laser irradiator remain unchanged. The laser receiving component 2 is removed and replaced in place with the guide head whose frame angle zero error needs to be calibrated. The communication and power cables of the guide head are thrown out through the guide head cable through hole 5. Then, the frame angle zero error is calibrated according to the frame angle value fed back by the host computer of the guide head test.

[0005] The laser detection device mounting plate 7 is fixedly connected to the guide head or laser receiving component mounting plane 3 by screw holes and screws.

[0006] A method for calibrating the zero-position error of the frame angle of a platform-type laser semi-active seeker, the calibration method being implemented based on a calibration device, specifically including the following steps: Step 1: Install the laser receiver assembly; Step 2: Adjust the attitude of the laser irradiator; Step 3: Guide head installation; Step 4: Recording and correcting the zero-position error of the frame angle.

[0007] Specifically, step 1 includes: Step 11: Design the L-shaped seeker calibration fixture installation plane 3 according to the interface dimensions between the seeker and the guidance cabin; Step 12: Design the laser detection device mounting plate 7 according to the interface dimensions of the laser detection device 6; Step 13: Select a laboratory-calibrated laser detection device 6 and install it on the laser detection device mounting plate. The communication and power cables of the laser detection device 6 pass through the holes of the laser detection device cable 9. Install the laser receiving component 2 on the mounting plane 3 of the L-shaped guide head calibration fixture. The communication and power cables of the laser detection device 6 pass through the holes of the guide head cable 5. Step 14: Power on the laser detection device 6, place the laser irradiator at a suitable position in front of it, and power on the laser irradiator to ensure that the laser detection device 6 can receive the laser signal emitted by the laser irradiator.

[0008] Specifically, step 2 involves adjusting the posture of the laser irradiator based on the deviation angle of the irradiated laser beam fed back by the laser detection device 6, until the deviation angle of the irradiated laser beam is 0.

[0009] Specifically, step 3 includes: Step 31: Ensure that the position and orientation of the laser irradiator and L-shaped guide head calibration fixture 1 remain unchanged, turn off the power of the laser detection device 6, and safely remove the laser receiving component 2; Step 32: Install the guide head to be calibrated on the mounting plane 3 of the L-shaped guide head calibration fixture. The communication and power cables of the guide head pass through the cable through hole 5 of the guide head and power on the guide head.

[0010] Specifically, step 4 includes: Step 41: Control the seeker to enter tracking mode, track the laser signal emitted by the laser irradiator, and after the seeker frame angle stabilizes, record the seeker output frame angle. ), turn off the seeker head power; Step 42: Power on the seeker again, control the seeker to enter tracking mode, track the laser signal emitted by the laser irradiator, and wait for the seeker frame angle to stabilize before recording the seeker output frame angle. ), turn off the power to the seeker head; Step 43: Power on the seeker again, control the seeker to enter tracking mode, track the laser signal emitted by the laser irradiator, and wait for the seeker frame angle to stabilize before recording the seeker output frame angle. ), turn off the seeker head power; Step 44: Modify the seeker head servo control program to adjust the frame angle zero position to ( The zero-position error calibration of the platform-type laser semi-active seeker frame angle has been completed.

[0011] (III) Beneficial Effects This invention proposes a platform-type laser semi-active seeker frame angle zero-position error calibration device and method. The invention is simple to operate, using seeker testing equipment. The calibration device has the advantages of simple structure, strong robustness, and can be obtained by modifying seeker testing fixtures, making it easy to manufacture. Using this calibration device and method, frame angle zero-position error calibration can be quickly and conveniently achieved under seeker functional performance testing environments, with reliable calibration results. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the external appearance of the device of the present invention; Figure 2 A schematic diagram of the L-shaped guide head calibration fixture; Figure 3 This is a schematic diagram of the laser receiver component. Figure 4 Schematic diagram of the laser detection mounting plate Figure 5 This is a flowchart of the method of the present invention. Detailed Implementation

[0013] To make the objectives, contents, and advantages of the present invention clearer, the specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples.

[0014] This embodiment provides a platform-type laser semi-active seeker frame angle zero-position error calibration device, including: an L-shaped seeker calibration fixture 1 and a laser receiving component 2; The L-shaped guide head calibration fixture 1 includes two mounting plates that are fixedly connected perpendicularly to each other, namely a fixed base plate 4 and a vertical mounting plate; The front surface of the vertical mounting plate is set as a mounting plane 3 for the guide head or laser receiving component. A guide head cable passage hole 5 is opened at the center of the mounting plane 3. The laser receiving component 2 is fixed on the mounting plane 3. The laser receiving assembly 2 includes: a laser detection device 6, a laser detection device mounting plate 7, and a laser detection device fixing plate 8; The laser detection device mounting plate 7 has a laser detection device cable passage hole 9, and laser detection device fixing brackets 10 are provided on both sides of the laser detection device cable passage hole 9. The laser detection device 6 is fixed to the laser detection device mounting bracket 10 by the laser detection device mounting plate 8; During the frame angle zero position error calibration process, the L-shaped guide head calibration fixture 1 is fixed on the guide head test platform, the laser detection device 6 is clipped onto the laser detection device fixing bracket 10 through the laser detection device fixing plate 8, and the laser detection device fixing plate 8 is fixed. The communication and power cables of the laser detection device 6 are thrown out through the laser detection device cable through hole 9 and connected to the control host computer. The attitude of the laser irradiator is adjusted according to the deviation angle fed back by the laser detection device 6 to ensure that the positions of the L-shaped guide head calibration fixture 1 and the laser irradiator remain unchanged. The laser receiving component 2 is removed and replaced in place with the guide head whose frame angle zero error needs to be calibrated. The communication and power cables of the guide head are thrown out through the guide head cable through hole 5. Then, the frame angle zero error is calibrated according to the frame angle value fed back by the host computer of the guide head test.

[0015] The laser detection device mounting plate 7 is fixedly connected to the guide head or laser receiving component mounting plane 3 by screw holes and screws.

[0016] A method for calibrating the zero-position error of the frame angle of a platform-type laser semi-active seeker, the calibration method being implemented based on a calibration device, specifically including the following steps: Step 1: Install the laser receiver assembly; Step 2: Adjust the attitude of the laser irradiator; Step 3: Guide head installation; Step 4: Recording and correcting the zero-position error of the frame angle.

[0017] Specifically, step 1 includes: Step 11: Design the L-shaped seeker calibration fixture installation plane 3 according to the interface dimensions between the seeker and the guidance cabin; Step 12: Design the laser detection device mounting plate 7 according to the interface dimensions of the laser detection device 6; Step 13: Select a laboratory-calibrated laser detection device 6 and install it on the laser detection device mounting plate. The communication and power cables of the laser detection device 6 pass through the holes of the laser detection device cable 9. Install the laser receiving component 2 on the mounting plane 3 of the L-shaped guide head calibration fixture. The communication and power cables of the laser detection device 6 pass through the holes of the guide head cable 5. Step 14: Power on the laser detection device 6, place the laser irradiator at a suitable position in front of it, and power on the laser irradiator to ensure that the laser detection device 6 can receive the laser signal emitted by the laser irradiator.

[0018] Specifically, step 2 involves adjusting the posture of the laser irradiator based on the deviation angle of the irradiated laser beam fed back by the laser detection device 6, until the deviation angle of the irradiated laser beam is 0.

[0019] Specifically, step 3 includes: Step 31: Ensure that the position and orientation of the laser irradiator and L-shaped guide head calibration fixture 1 remain unchanged, turn off the power of the laser detection device 6, and safely remove the laser receiving component 2; Step 32: Install the guide head to be calibrated on the mounting plane 3 of the L-shaped guide head calibration fixture. The communication and power cables of the guide head pass through the cable through hole 5 of the guide head and power on the guide head.

[0020] Specifically, step 4 includes: Step 41: Control the seeker to enter tracking mode, track the laser signal emitted by the laser irradiator, and after the seeker frame angle stabilizes, record the seeker output frame angle. ), turn off the seeker head power; Step 42: Power on the seeker again, control the seeker to enter tracking mode, track the laser signal emitted by the laser irradiator, and wait for the seeker frame angle to stabilize before recording the seeker output frame angle. ), turn off the seeker head power; Step 43: Power on the seeker again, control the seeker to enter tracking mode, track the laser signal emitted by the laser irradiator, and wait for the seeker frame angle to stabilize before recording the seeker output frame angle. ), turn off the seeker head power; Step 44: Modify the seeker head servo control program to adjust the frame angle zero position to ( The zero-position error calibration of the platform-type laser semi-active seeker frame angle has been completed.

[0021] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A platform-type laser semi-active seeker frame angle zero-position error calibration device, characterized in that, include: L-shaped seeker calibration fixture (1) and laser receiver assembly (2); The L-shaped guide head calibration fixture (1) includes two mounting plates that are fixedly connected perpendicularly to each other, namely a fixed base plate (4) and a vertical mounting plate; The front surface of the vertical mounting plate is set as the mounting plane (3) for the guide head or laser receiving component. A guide head cable through hole (5) is opened at the center of the mounting plane (3). The laser receiving component (2) is fixed on the mounting plane (3). The laser receiving assembly (2) includes: a laser detection device (6), a laser detection device mounting plate (7), and a laser detection device fixing plate (8). The laser detection device mounting plate (7) is provided with a laser detection device cable passage hole (9), and laser detection device fixing brackets (10) are provided on both sides of the laser detection device cable passage hole (9). The laser detection device (6) is fixed on the laser detection device mounting bracket (10) by the laser detection device mounting plate (8); During the zero-position error calibration of the frame angle, the L-shaped guide head calibration fixture (1) is fixed on the guide head test platform. The laser detection device (6) is clamped on the laser detection device fixing bracket (10) through the laser detection device fixing plate (8) and the laser detection device fixing plate (8) is fixed. The communication and power cables of the laser detection device (6) are thrown out through the laser detection device cable through hole (9) and connected to the control host computer. Adjust the attitude of the laser irradiator according to the deviation angle fed back by the laser detection device (6) to ensure that the position of the L-shaped guide head calibration fixture (1) and the laser irradiator remains unchanged. Remove the laser receiving component (2) and replace the guide head with the zero position error of the upper frame angle to be calibrated in the original position. The communication and power cables of the guide head are thrown out through the guide head cable through hole (5). Then, calibrate the zero position error of the frame angle according to the frame angle value fed back by the upper computer of the guide head test.

2. The platform-type laser semi-active seeker frame angle zero-position error calibration device as described in claim 1, characterized in that, The mounting plate (7) of the laser detection device is fixedly connected to the mounting surface (3) of the guide head or laser receiving component by screw holes.

3. A method for calibrating the zero-position error of a platform-type laser semi-active seeker frame, characterized in that, The calibration method is implemented based on the calibration device described in claim 2, and specifically includes the following steps: Step 1: Install the laser receiver assembly; Step 2: Adjust the attitude of the laser irradiator; Step 3: Guide head installation; Step 4: Recording and correcting the zero-position error of the frame angle.

4. The platform-type laser semi-active seeker frame angle zero-position error calibration method as described in claim 3, characterized in that, Step 1 specifically includes: Step 11: Design the L-shaped guide head calibration fixture installation plane according to the interface size between the guide head and the guidance cabin (3); Step 12: Design the laser detection device mounting plate (7) according to the interface size of the laser detection device (6); Step 13: Select a laboratory-calibrated laser detection device (6) and install it on the laser detection device mounting plate. The communication and power cables of the laser detection device (6) pass through the holes of the laser detection device cable (9). Install the laser receiving component (2) on the mounting plane (3) of the L-shaped guide head calibration fixture. The communication and power cables of the laser detection device (6) pass through the holes (5) of the guide head cable. Step 14: Power on the laser detection device (6), place the laser irradiator at a suitable position in front of it, power on the laser irradiator, and ensure that the laser detection device (6) can receive the laser signal emitted by the laser irradiator.

5. The platform-type laser semi-active seeker frame angle zero-position error calibration method as described in claim 3, characterized in that, Step 2 specifically involves adjusting the posture of the laser irradiator based on the deviation angle of the irradiated laser beam fed back by the laser detection device (6) until the deviation angle of the irradiated laser beam is (0,0).

6. The platform-type laser semi-active seeker frame angle zero-position error calibration method as described in claim 3, characterized in that, Step 3 specifically includes: Step 31: Ensure that the position and orientation of the laser irradiator and the L-shaped guide head calibration fixture (1) remain unchanged, turn off the power of the laser detection device (6), and safely remove the laser receiving component (2). Step 32: Install the guide head to be calibrated on the mounting plane (3) of the L-shaped guide head calibration fixture. The communication and power cables of the guide head pass through the cable through hole (5) of the guide head and power on the guide head.

7. The platform-type laser semi-active seeker frame angle zero-position error calibration method as described in claim 3, characterized in that, Step 4 specifically includes: Step 41: Control the seeker to enter tracking mode, track the laser signal emitted by the laser irradiator, and after the seeker frame angle stabilizes, record the seeker output frame angle. ), turn off the seeker head power; Step 42: Power on the seeker again, control the seeker to enter tracking mode, track the laser signal emitted by the laser irradiator, and wait for the seeker frame angle to stabilize before recording the seeker output frame angle. ), turn off the seeker head power; Step 43: Power on the seeker again, control the seeker to enter tracking mode, track the laser signal emitted by the laser irradiator, and wait for the seeker frame angle to stabilize before recording the seeker output frame angle. ), turn off the seeker head power; Step 44: Modify the seeker head servo control program to adjust the frame angle zero position to ( The zero-position error calibration of the platform-type laser semi-active seeker frame angle has been completed.

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