WO2020199684A1

WO2020199684A1 - Field test device for testing radio-based moving aerial target detection performance

Info

Publication number: WO2020199684A1
Application number: PCT/CN2019/129238
Authority: WO
Inventors: 江茂军
Original assignee: 贵州航天电子科技有限公司
Priority date: 2019-04-01
Filing date: 2019-12-27
Publication date: 2020-10-08
Also published as: CN110118965B; CN110118965A

Abstract

Provided is a field test device for testing radio-based moving aerial target detection performance, comprising a lower tooling plate, an upper tooling plate, a tower crane and a supporting device. The lower tooling plate is fixed to the ground. The upper tooling plate is suspended from the tower crane. A target ball is threaded onto a guide cable and lifted by means of a lifting cable wound upon the upper tooling plate. A measure line is positioned beside the target ball. An upper end of the measure line is fixed at the upper tooling plate, and a lower end of the measure line is fixed at the lower tooling plate. The supporting device is fixed at one side of the lower tooling plate. The supporting device is connected to a high speed camera by means of a trigger signal line. The high speed camera faces the target ball. Since the invention does not require a wave absorption device, a detection device will not experience interference from a radio signal reflected off a wave absorption device, and as a result the target detection performance of the detection device can be accurately examined. Moreover, execution of the test method does not require any power to drive relative motion of a product and a target other than a small amount of manual labor, thereby reducing energy and test costs.

Description

An external field test device for radio detection characteristics of air moving targets

Technical field

The invention relates to an external field test device for the detection characteristics of a radio on air moving targets.

Background technique

Radio air-moving target detection devices usually need to pass field tests to verify their target detection characteristics. The current field test methods are mainly the slide rail method. The feature of the sliding rail method is that the detection device is placed parallel to the ground, the target is suspended in the air, and the target and the detection device move in the horizontal direction under the action of external force. When the detection device and the target meet, check whether the detection device is moving , And whether the relative distance between the detection device and the target in the vertical direction and the horizontal direction is correct at the moment of action, so as to check the target detection characteristics of the detection device. In this method, because the detection device is placed horizontally, the antenna beam of the detection device will illuminate the ground to form a ground reflection signal. The ground reflected signal interferes with the detection device, which will affect the target detection characteristics of the detection device. In order to eliminate the interference of ground reflected signals, it is usually necessary to install an absorber at the position where the antenna beam of the detection device may illuminate the ground. The disadvantage of this method is that the absorbing plate can only absorb the signal radiated by the antenna of the detection device to a certain extent, and cannot absorb all of it. Therefore, some of the signal will be reflected back. When the strength of the reflected signal causes the receiver of the detection device Saturation may cause the increase of noise in the signal processing channel of the detection device, which will affect the working state of the detection device and cause the target detection characteristics of the detection device to be unreal.

The current slide rail method has the disadvantage that the absorber can only absorb the signal radiated by the antenna of the detection device to a certain extent, and cannot absorb all of it. Therefore, a part of the signal will be reflected back. When the intensity of the reflected signal is Saturation of the detection device receiver or increase of noise in the signal processing channel of the detection device will affect the working state of the detection device, resulting in unrealistic target detection characteristics of the detection device.

Summary of the invention

In order to solve the above technical problems, the present invention provides an outfield test device for the detection characteristics of a radio on aerodynamic targets. The radio field test device for the detection characteristics of aerodynamic targets will not interfere with the detection device, and can truly verify the detection device Target detection characteristics.

The present invention is achieved through the following technical solutions.

The invention provides a radio field test device for the detection characteristics of air moving targets, which includes a bottom tooling plate, an upper tooling plate, a tower crane, and a supporting device; the bottom tooling plate is fixed below the upper tooling plate, and the upper tooling plate is hoisted on the tower crane, The target ball passes on the guide rope and is lifted by the lifting rope around the upper tooling plate. The ruler line is located next to the target ball. The upper end of the ruler line is fixed to the upper tooling plate and the lower end is fixed to the bottom tooling plate, on the side of the bottom tooling plate. A support device is fixed at the square position, and the support device is connected with a high-speed camera through the trigger signal line, and the high-speed camera faces the target ball.

The supporting device is composed of a base, a vertical rod, and a mounting plate. The base is fixed on the ground, the vertical rod is vertically fixed on the base, the upper end of the vertical rod is fixed with a mounting plate, and the detection device for testing is mounted on the mounting plate.

The ruler line is composed of a plurality of marks fixed at equal intervals on the line.

The detection device is installed on the mounting plate through mounting screws.

The area of the base in the vertical projection is more than twice that of the mounting plate, and the base and the mounting plate are concentric.

There are press blocks on the side edges of the bottom tooling board.

The buffer pad is placed on the upper tooling board, and the guide cable passes through the buffer pad.

There are two guide cables, which are located on both sides of the target ball and pass through the target ball at symmetrical positions on the vertical center line of the target ball.

The beneficial effect of the present invention is that it will not interfere with the detection device, so the target detection characteristics of the detection device can be truly checked; in addition to a slight manpower, this test method does not require other power to drive the product and the relative movement of the target, saving Energy, reducing test costs; one test only requires manpower to raise the target ball, then put it down, and the image can be saved. It takes about 1 minute and is more efficient.

Description of the drawings

Figure 1 is a schematic diagram of the structure of the present invention.

In the picture: 1-ground, 21-bottom tooling board, 22-press block, 23-buffer pad, 24-guide cable, 25-upper tooling board, 26-ruler line, 261-line, 262-mark, 27-lift Pull rope, 28-tower crane, 3-support device, 31-base, 32-pole, 33-mounting plate, 34-mounting screw, 35-detection device, 36-antenna beam, 37-trigger signal line, 38-high speed Camera, 41-target ball, 42-operator.

detailed description

The technical solution of the present invention is further described below, but the scope of protection is not limited to the above.

A radio field test device for the detection characteristics of airborne moving targets, as shown in Figure 1, includes a bottom tooling plate 21, an upper tooling plate 25, a tower crane 28, and a supporting device 3; the bottom tooling plate 21 is fixed below the upper tooling plate 25 , The upper tooling plate 25 is hoisted on the tower crane 28, the target ball 41 passes on the guide rope 24 and is lifted by the lifting rope 27 wound around the upper tooling plate 25, the ruler line 26 is located next to the target ball 41, and the upper end of the ruler line 26 is fixed The upper tooling plate 25 and the lower end are fixed to the bottom tooling plate 21. A supporting device 3 is fixed at the side of the bottom tooling plate 21. The supporting device 3 is connected to a high-speed camera 38 through a trigger signal line 37, and the high-speed camera 38 faces the target Ball 41.

The supporting device 3 is composed of a base 31, a vertical pole 32, and a mounting plate 33. The base 31 is fixed on the ground 1, the vertical rod 32 is vertically fixed on the base 31, and the upper end of the vertical rod 32 is fixed with a mounting plate 33 for testing detection. The device 35 is mounted on the mounting disk 33.

The scale line 26 is composed of a plurality of marks 262 fixed on the line 261 at equal intervals.

The detection device 35 is mounted on the mounting plate 33 by a mounting screw 34.

The area of the base 31 in the vertical projection is more than twice that of the mounting plate 33, and the base 31 and the mounting plate 33 are concentric.

A pressing block 22 is provided on the side edge of the bottom tooling plate 21.

There are two guiding cables 24, which are located on both sides of the target ball 41 and pass through the target ball at symmetrical positions on the vertical center line of the target ball.

Thus, the detection device 35 is installed perpendicular to the ground 1 through the supporting device 3 and is higher than the ground 1. The target ball 41 is pulled to a certain height by the operator 42 through the lifting rope 27, and then the lifting rope 27 is released to allow the target ball 41 to fall freely. When the target ball 41 crosses the antenna beam 36 of the detection device 35 (intersection), the detection device 35 generates a trigger signal after the action, and the trigger signal triggers the high-speed camera 38 to capture the image of the target ball 41 at this time. Afterwards, the height of the target ball 41 is judged by the target ball 41 and the ruler line 26 in the image, and then the height of the detection device 35 measured in advance is compared to obtain the relative distance between the target ball 41 and the detection device 35 in the vertical direction. The relative distance in the horizontal direction of the device 35 is measured in advance. After the relative distance between the detection device 35 and the target ball 41 in the vertical and horizontal directions at the time of action, the detection characteristics of the target ball 41 of the detection device 35 can be tested according to the determination method specified in the field test program for the detection characteristics of the detection device, so as to achieve the same The same test purpose as the slide rail method.

Specifically, in addition to the detection device 35, it consists of a mounting plate 33, a mounting screw 34, a supporting device 3, a pressing block 22, a tooling plate, a cushion 23, a guide cable 24, a ruler line 26, a lifting rope 27, a target ball 41, It is composed of a high-speed camera 38, a trigger signal line 37, a measuring tape, a plumb bob, a tower crane 28 and other necessary power supply equipment.

The supporting device 3 is composed of a mounting plate 33, a mounting screw 34, a pole 32, and a base 31. The top of the supporting device 3 is the mounting plate 33. The size and shape of the mounting plate 33 are determined according to the installation interface structure and the mounting hole of the detection device 35. It is necessary to ensure that the axial direction of the detection device 35 is perpendicular to the ground 1. The installation plate 33 signals the detection device 35 Wire through holes are opened at the corresponding position of the cable. Below the mounting plate 33 is a vertical rod 32, and below the vertical rod 32 is a base 31, which are connected by welding. The length of the pole 32 should ensure that after the detection device 35 is installed, the signal reflected from the ground 1 through the antenna sidelobe of the detection device 35 has no effect on the signal processing channel noise. The pole 32 adopts a steel pipe material with certain strength and rigidity, and its strength and rigidity can ensure that the total weight of the detection device 35, the mounting plate 33 and the mounting screw 34 at the top and its own weight are adequately supported, and the maximum wind speed allowed in the test The principle should not be shaken in the environment. The base 31 is designed as a steel plate with a certain contact area and a certain weight with the ground 1. The design principle is to ensure that the support device 3 with the detection device 35 does not fall down under the maximum wind speed environment allowed by the test.

The ruler line 26 is composed of a line 261 and a mark 262. The line 261 is a non-metallic wire with a small stretch rate, and the mark 262 is pasted with a sticker paper. The size of the mark 262 should be guaranteed to be normal in the image taken by the high-speed camera 38 identify. The mark position of the ruler line 26 should be determined according to the distance accuracy required by the test to determine the distance between the two marks, and then be calibrated with a measuring tape.

The guide cable 24 is to limit the trajectory of the target ball 41 falling, and to avoid deviation from the direction due to wind. In order to ensure that the target ball 41 does not rotate during the falling process (rotation will cause the lifting rope 27 and the guide rope 24 to be entangled), two parallel guide ropes 24 are provided. The guide cable 24 adopts a steel wire with a diameter of 2mm, which has a small reflection area while ensuring good wear resistance. The surface of the guide cable 24 is coated with lubricant to reduce the resistance when the target ball 41 passes.

The target ball 41 is a stainless steel hollow ball with a wall thickness of no more than 1 mm. The thinner wall thickness makes the target ball 41 lighter, which is convenient for lifting and saving effort. The target ball 41 is provided with through holes with a diameter of φ10mm at the positions where the guide cable 24 needs to pass (a total of four). The through holes with a larger diameter facilitate the guide cable 24 to slide through without resistance. The target ball 41 is welded with a metal ring at the top center point to facilitate the tie-up rope 27.

The lifting rope 27 is for the operator 42 to pull the target ball 41 to a predetermined height with his hands, and after the operator 42 releases the lifting rope 27, the ball falls in a free fall manner. The lifting rope 27 uses 6# nylon fishing line to ensure sufficient strength and low friction.

The tooling plate is used to ensure the parallelism of the guide cable 24 and the scale line 26, and is designed with a steel plate with a thickness of 10 mm. The board is provided with through holes at the binding position of the guide rope 24, the lifting rope 27 and the ruler line 26, which are used to bind the guide rope 24 and the ruler line 26 and pass the lifting rope 27. The edges of the through holes used for the lifting rope 27 to pass need to be polished smooth and lubricated to reduce the resistance when the lifting rope 27 passes. Two tooling plates (bottom tooling plate 21 and upper tooling plate 25) are required to be placed at both ends of the guide cable 24 and the ruler line 26. The upper tooling plate 25 is fixed on the hook of the tower crane 28 by a rope, and the bottom tooling plate 21 is pressed tightly to the ground 1 by a pressing block 22.

The pressing block 22 is used to press the bottom tooling plate 21 to the ground 1 and is cut from a steel plate with a thickness of 20 mm. Its weight must ensure that the bottom tooling plate 21 is close to the ground 1 when the guide cable 24 is straightened.

The cushion 23 is placed on the bottom tooling plate 21 of the ground 1 to prevent the target ball 41 from hitting the bottom tooling plate 21 or the ground 1 after falling and being damaged. The buffer pad 23 is cut into a round cake shape by a sponge block with a thickness of not less than 0.3 m, and its diameter should not be less than the diameter of the target ball 41. In order to limit the horizontal displacement of the cushion 23 when the target ball 41 hits, a limit through hole is provided in the cushion 23, and the guide cable 24 passes through the limit through hole, and the horizontal direction of the cushion 23 is restricted by the guide cable 24. Displacement.

The high-speed camera 38 is used to capture the image of the target ball 41 at the time when the detection device 35 is in motion. An industrial camera with a triggering camera function is used, and the trigger delay is no more than 1 μs. The placement position of the high-speed camera 38 first requires its lens sight axis to be perpendicular to the plane formed by the guide cable 24 and the ruler line 26, and then on the premise that the field of view of the high-speed camera 38 covers all the position ranges where the target ball 41 may cause the detection device 35 to move. Next, the mark image of the ruler line 26 is as large as possible.

The trigger signal line 37 is used to lead the action signal output by the detection device 35 to the high-speed camera 38. To avoid external interference, a single-core shielded cable is used.

Commonly used auxiliary tools are measuring tape and plumb. The measuring tape is used to measure the horizontal distance from the product to the target ball 41, the height of the installation position of the detection device 35, and the distance calibration when making the ruler line 26. The plumb is used to ensure the verticality to the ground 1 when the guide rope 24 and the ruler line 26 are hung, and also to ensure that the support device 3 is vertical to the ground 1.

The tower crane 28 is used to lift the guide wire 24, the scale wire 26, and the lifting wire 27, and fix them in the air.

Industrial applicability: This application can be used in industry and has industrial applicability.

It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be regarded as the protection scope of the present invention. All the components that are not clear in this embodiment can be implemented using existing technology.

Claims

A radio field test device for detecting characteristics of air moving targets, comprising a bottom tooling plate (21), an upper tooling plate (25), a tower crane (28), and a supporting device (3), characterized in that: the bottom tooling plate (21) ) Is fixed under the upper tooling plate (25), the upper tooling plate (25) is hoisted on the tower crane (28), and the target ball (41) is passed on the guide rope (24) and passed around the upper tooling plate (25). The draw rope (27) is lifted, and the ruler line (26) is located next to the target ball (41). The upper end of the ruler line (26) is fixed to the upper tooling plate (25), and the lower end is fixed to the bottom tooling plate (21). (21) A supporting device (3) is fixed at the side position, and the supporting device (3) is connected with a high-speed camera (38) through a trigger signal line (37), and the high-speed camera (38) faces the target ball (41).
The radio field test device for the detection characteristics of airborne moving targets according to claim 1, wherein the supporting device (3) is composed of a base (31), a pole (32), and a mounting plate (33), and the base ( 31) is fixed on the ground (1), the pole (32) is vertically fixed on the base (31), the upper end of the pole (32) is fixed with a mounting plate (33), and the detection device (35) for testing is installed on the mounting plate (33) On.
The radio field test device for detecting characteristics of airborne moving targets according to claim 1, wherein the scale line (26) is composed of a plurality of marks (262) fixed on the line (261) at equal intervals.
The radio field test device for the detection characteristics of aerodynamic targets according to claim 2, characterized in that the detection device (35) is installed on the mounting plate (33) through a mounting screw (34).
The radio field test device for detecting characteristics of airborne moving targets according to claim 2, characterized in that: the area of the base (31) in the vertical projection is larger than twice that of the mounting plate (33), and the base (31) and the installation The disc (33) is concentric.
The radio field test device for the detection characteristics of air moving targets according to claim 1, characterized in that: the bottom tooling plate (21) has a pressure block (22) on the side edge.
The radio field test device for the detection characteristics of aerodynamic targets according to claim 1, characterized in that: the cushion (23) is placed on the upper tooling plate (25), and the guide cable (24) is removed from the cushion (23) ) Through.
The radio field test device for detecting characteristics of air moving targets according to claim 7, characterized in that there are two guide cables (24), which are located on the symmetrical position of the vertical center line of the target ball and pass through the target ball (41). ).