Test method of electromagnetic catapult

Abstract

The invention discloses a test method of an electromagnetic catapult, and relates to the technical field of catapult performance testing, and the electromagnetic catapult, a simulation launcher, a timing module arranged on the simulation launcher, and a grating launcher are included. According to the test method of the electromagnetic catapult, an acceleration function model is constructed through the duration of each period of a grating emitter, distance changes recorded in the period and the weight of a simulation emitter, then the path of the simulation emitter is guaranteed not to deviate through a guide rail and always moves along the guide rail, and under the action of friction force between an inner wheel and the guide rail, the simulation emitter is tested. Therefore, the simulation launcher can stop sliding in time after the inertia acting force disappears, and errors caused by the distance generated in the sliding process are reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of ejection performance testing, and in particular to a testing method for an electromagnetic ejector. Background Art

[0002] The electromagnetic catapult needs to be tested for its performance before it is delivered for use to ensure its subsequent normal use. The tests often focus on electrical and software performance, as well as statistical data such as the catapult's launching distance and speed of test objects with different loads.

[0003] In conjunction with publication number CN113280679B, publication date 2023-08-25, an ejection test system and method are disclosed, including a load simulation block and a capture frame, the load simulation block is ejected along the track by the ejection device, the capture frame is arranged at the end of the track of the ejection device, the capture frame is provided with a capture piece, when the load simulation block is ejected along the track by the ejection device, the capture piece of the capture frame intercepts to capture the ejected load simulation block; the capture device uses the capture frame to achieve early capture when the load simulation block is freely thrown.

[0004] However, in the prior art including the above-mentioned patent, since the catapult device is provided with wings, after the inertial force of the catapult device sliding along the track disappears, the lift generated between the wings and the airflow will continue to act on the catapult device, causing the path of the catapult device to deviate. Summary of the invention

[0005] The purpose of the present invention is to provide a testing method for an electromagnetic catapult to solve the above problems.

[0006] In order to achieve the above object, the present invention provides the following technical solution: a method for testing an electromagnetic catapult, comprising an electromagnetic catapult, a simulation launcher, a timing module and a grating launcher arranged on the simulation launcher, comprising the following steps:

[0007] Step 1: Place the simulated launcher at the launch end of the electromagnetic catapult, and start the electromagnetic catapult, grating launcher, and timing module;

[0008] Step 2: The simulated transmitter is ejected, during which the grating transmitter intermittently sends a light signal with a fixed period of seconds. The light signal is transmitted to the simulated transmitter and then reflected back. The reflected signal is transmitted to the receiving end of the grating transmitter for distance measurement, and the value of each distance measurement is recorded;

[0009] Step 3: The simulated launcher stops moving, and the timing module stops timing. The stop position at this time is the end position of the current ejection experiment. The ejection length is recorded. The acceleration function model is constructed according to the length of each cycle of the grating launcher, the distance change recorded within the cycle, and the weight of the simulated launcher, and the ejection acceleration is recorded.

[0010] Step 4: Add simulated launcher weight and repeat the ejection test to obtain stable ejection length, time, and acceleration data.

[0011] Preferably, it also includes a guide rail arranged on the launch path;

[0012] A reflector disposed on the simulated emitter and used to reflect the light emitted by the grating emitter;

[0013] The inner wheel disposed on the simulation transmitter is rotated, and a plurality of sawtooth blocks are disposed in a circular array on the inner wheel;

[0014] A limiting piece is slidably arranged on the simulation transmitter and is tangent to the sawtooth block, and when the inner wheel rotates, the limiting piece and the sawtooth block are interlaced.

[0015] Preferably, it further comprises a support rod for supporting the simulation transmitter, and a blocking block for limiting the limiting member is arranged on the support rod.

[0016] Preferably, a rotating wheel is slidably sleeved on the inner wheel, and an inclined block for guiding the rotating wheel is fixedly provided on the simulation transmitter.

[0017] Preferably, a brake assembly is also included, which includes a brake disc for pressing against the guide rail.

[0018] Preferably, the brake discs are symmetrically arranged on both sides of the guide rail, and a rotating rod is arranged between the two brake discs, and the rotating rod switches between horizontal and inclined states.

[0019] Preferably, a clamping piece for limiting the rotating rod to a horizontal state is slidably provided on the simulation transmitter, and a transmission rod slidably matched with the clamping piece is provided on the simulation transmitter.

[0020] Preferably, the transmission rod is slidably disposed on the simulation transmitter and cooperates with the rotating wheel.

[0021] Preferably, an anode plate and a cathode plate are respectively provided on the two brake discs, and the anode plate and the cathode plate are located on the timing module loop.

[0022] Preferably, a suction cup is provided on the side of the brake disc facing the guide rail.

[0023] In the above technical scheme, a testing method for an electromagnetic catapult provided by the present invention has the following beneficial effects: an acceleration function model is constructed by the duration of each cycle of the grating launcher, the distance change recorded within the cycle and the weight of the simulated launcher, and then a guide rail is used to ensure that the path of the simulated launcher will not deviate and always move along the guide rail. Moreover, under the action of the friction between the inner wheel and the guide rail, the simulated launcher stops slipping in time after the inertial force disappears, thereby reducing the distance error generated during the sliding process. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0025] Figure 1 An overall three-dimensional schematic diagram provided for an embodiment of the present invention;

[0026] Figure 2 A schematic diagram of the structure of a simulated transmitter and a rotating wheel provided in an embodiment of the present invention;

[0027] Figure 3 A schematic diagram of the structure of the rotating wheel and the inner wheel provided in an embodiment of the present invention;

[0028] Figure 4 A schematic diagram of a support rod and a stopper provided in an embodiment of the present invention;

[0029] Figure 5 A schematic diagram of the brake disc structure provided by an embodiment of the present invention;

[0030] Figure 6 A schematic diagram of a brake disc with the rotating rod provided in an embodiment of the present invention in a horizontal state.

[0031] Description of reference numerals:

[0032] 1. Electromagnetic catapult; 2. Grating launcher; 3. Guide rail; 4. Reflector; 5. Simulation launcher; 6. Rotating wheel; 61. Bump; 7. Support rod; 71. Block; 72. Third spring; 8. Limiting piece; 81. Arc rod; 9. Inner wheel; 91. Oblique block; 92. Sawtooth block; 10. Transmission rod; 11. Guide groove; 12. Brake disc; 121. Suction cup; 13. First spring; 14. Rotating rod; 15. Fixing plate; 16. Clamp; 17. Second spring; 18. Anode plate; 19. Cathode plate. DETAILED DESCRIPTION

[0033] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0034] like Figure 1-6 As shown, a test method for an electromagnetic catapult includes an electromagnetic catapult 1, a simulation launcher 5, a timing module arranged on the simulation launcher 5, and a grating launcher 2, characterized in that it includes the following steps:

[0035] Step 1: Place the simulated launcher 5 at the launch end of the electromagnetic catapult 1, and start the electromagnetic catapult 1, the grating launcher 2, and the timing module;

[0036] Step 2: The simulated transmitter 5 is ejected, during which the grating transmitter 2 intermittently sends a light signal with a fixed period of seconds. The light signal is transmitted to the simulated transmitter 5 and then reflected back. The reflected signal is transmitted to the receiving end of the grating transmitter 2 for distance measurement, and the value of each distance measurement is recorded;

[0037] Step 3: The simulated launcher 5 stops moving, and the timing module stops timing. The stop position at this time is the end position of the current ejection experiment. The ejection length is recorded. The acceleration function model is constructed according to the length of each cycle of the grating launcher 2, the distance change recorded within the cycle, and the weight of the simulated launcher 5, and the ejection acceleration is recorded.

[0038] Step 4: Add the simulated launcher 5 load and repeat the ejection test to obtain stable ejection length, time, and acceleration data.

[0039] Specifically, it also includes a control panel for recording data. The control panel is preset with software for converting each data into speed and time or acceleration and time images, so that the staff can check the image fluctuations in time. The above-mentioned electronic components are all technical common sense known to technical personnel in this field and will not be elaborated here.

[0040] As an embodiment further provided by the present invention, it also includes a guide rail 3 arranged on the launch path;

[0041] A reflector 4 disposed on the analog transmitter 5 and used to reflect the light emitted by the grating transmitter 2;

[0042] The inner wheel 9 is rotatably arranged on the simulated transmitter 5, and a plurality of sawtooth blocks 92 are arranged in a circular array on the inner wheel 9;

[0043] The limiting member 8 is slidably disposed on the simulated transmitter 5 and is tangent to the sawtooth block 92 . When the inner wheel 9 rotates, the limiting member 8 and the sawtooth block 92 are interlaced.

[0044] Specifically, the inner wheels 9 are symmetrically arranged on both sides of the guide rail 3. After the simulated launcher 5 is ejected, it slides along the guide rail 3. The inner wheel 9 rotates rapidly while being tangent to the side surface of the guide rail 3. The limiter 8 is provided with a ratchet tangent to the sawtooth block 92. When the inner wheel 9 rotates, the ratchet slides down the inclined surface of the side surface of the sawtooth block 92, driving the limiter 8 and the sawtooth block 92 to be staggered. The top surface of the sawtooth block 92 under rapid rotation forms an approximately continuous surface, which supports the ratchet, so that the limiter 8 no longer restricts the rotation of the inner wheel 9. After the inertial force generated by the ejection on the simulated launcher 5 disappears, the rotation of the inner wheel 9 slows down. At this time, the inner wheel 9 still has a tendency to rotate under the action of centrifugal force, and due to the reduction in the rotation speed of the inner wheel 9, the support of the top surface of the sawtooth block 92 on the ratchet is no longer continuous, and the ratchet slides down along the inclined surface of the sawtooth block 92 under the action of its own weight, and the ratchet is tangent to the sawtooth block 92. At this time, the rotation of the inner wheel 9 is restricted by the limit piece 8, so that the inner wheel 9 stops rotating. Under the action of the friction between the inner wheel 9 and the guide rail 3, the simulated transmitter 5 stops sliding as a whole, preventing the simulated transmitter 5 from continuing to slide over a long distance when the inertial force disappears, thereby reducing the distance error generated during the sliding process.

[0045] In the above technology, an acceleration function model is constructed by the length of each cycle of the grating transmitter 2, the distance change recorded within the cycle and the weight of the simulated transmitter 5, and then the guide rail 3 is used to ensure that the path of the simulated transmitter 5 will not deviate and always move along the guide rail 3. In addition, under the action of the friction between the inner wheel 9 and the guide rail 3, the simulated transmitter 5 stops slipping in time after the inertial force disappears, thereby reducing the distance error caused by the sliding process.

[0046] As another embodiment further provided by the present invention, it also includes a support rod 7 for supporting the simulation transmitter 5 , and a blocking block 71 for limiting the limiting member 8 is provided on the support rod 7 .

[0047] Specifically, an arc rod 81 corresponding to the blocking block 71 is provided at the end of the limit member 8, and a third spring 72 is provided on the blocking block 71 for extending the blocking block 71 toward the limit member 8. In the default state, the inner wheel 9 is stationary and the limit member 8 is tangent to the serrated block 92 through the ratchet. At this time, the blocking block 71 is against the side of the limit member 8. At this time, the third spring 72 contracts and stores energy. Subsequently, the inner wheel 9 starts to rotate and drives the limit member 8 to move upward, so that the blocking block 71 is no longer blocked by the limit member 8. The stored energy of the third spring 72 is released and drives the blocking block 71 to enter the arc rod 81. The arc rod 81 is blocked by the blocking block 71 and stays at the current height, thereby avoiding interference caused by the limit member 8 during the rotation of the inner wheel 9 and reducing the test error.

[0048] As another embodiment further provided by the present invention, a rotating wheel 6 is slidably sleeved on the inner wheel 9 , and an inclined block 91 for guiding the rotating wheel 6 is fixedly provided on the simulation transmitter 5 .

[0049] Specifically, a plurality of protrusions 61 that slide with the inclined block 91 are arranged in an array on the inner circumference of the rotating wheel 6, and an arc rod 81 is located below the rotating wheel 6. After the simulated launcher 5 is ejected, the rotating wheel 6 is rotated tangentially by the guide rail 3 and drives the inner wheel 9 to rotate synchronously. The protrusion 61 slides along the inclined surface of the inclined block 91 and drives the rotating wheel 6 to move up relative to the inner wheel 9 to above the inclined block 91. At this time, the limit member 8 moves up to be offset from the sawtooth block 92, and the arc rod 81 is supported by the blocking block 71 and stays at this height. Then the rotation speed of the rotating wheel 6 decreases, and the rotating wheel 6 slides down along the inclined block 91 under the action of gravity. The rotating wheel 6 contacts the arc rod 81 and presses down the arc rod 81, so that the arc rod 81 squeezes the blocking block 71 and slides down, returning to the default state, and drives the ratchet to be tangential to the sawtooth block 92, so that the inner wheel 9 and the rotating wheel 6 stop rotating synchronously, thereby stopping the simulated launcher 5.

[0050] As another embodiment further provided by the present invention, a brake assembly includes a brake disc 12 for pressing against the guide rail 3 .

[0051] Specifically, the brake discs 12 are symmetrically arranged on both sides of the guide rail 3, and a rotating rod 14 is arranged between the two brake discs 12, and the rotating rod 14 switches between horizontal and inclined states. A fixed plate 15 is arranged on the simulation transmitter 5, and one of the brake discs 12 is slidably arranged on the fixed plate 15 along the vertical direction, and the other brake disc 12 is slidably arranged on the fixed plate 15 along the horizontal direction. In the horizontal state, the distance between the two brake discs 12 is greater than the width of the guide rail 3, and the brake discs 12 will not interfere with the sliding of the simulation transmitter 5. When the simulation transmitter 5 stops, the rotating rod 14 is driven to deflect to the inclined state. At this time, the distance between the two brake discs 12 is reduced and the guide rail 3 is squeezed from both sides. The friction force generated by the squeezing process causes the simulation transmitter 5 to stop, thereby reducing the sliding distance.

[0052] As another embodiment further provided by the present invention, a clamping member 16 for limiting the rotating rod 14 to a horizontal state is slidably provided on the simulation transmitter 5 , and a transmission rod 10 slidably matched with the clamping member 16 is provided on the simulation transmitter 5 .

[0053] Specifically, the brake disc 12 is provided with a first spring 13 for pulling the brake disc 12 to move upward, and the clamping piece 16 is provided with a second spring 17 for pushing the clamping piece 16. In the default state, the rotating rod 14 is in a horizontal state. At this time, the clamping piece 16 is pushed by the second spring 17 to limit the upward movement of the brake disc 12, and the first spring 13 is in a stretched and stored force state, so that the rotating rod 14 is maintained in a horizontal state. After the rotating wheel 6 and the inner wheel 9 stop rotating, the transmission rod 10 moves downward and drives the clamping piece 16 away from the brake disc 12 through the guide groove 11 provided on the transmission rod 10. The brake disc 12 moves upward under the elastic traction of the first spring 13, driving the rotating rod 14 to flip and tilt, and the other brake disc 12 presses the guide rail 3, thereby stopping the simulation transmitter 5 by friction. Since the brake disc 12 is provided with a suction cup 121 on the side facing the guide rail 3, the suction cup 121 is deformed and adsorbs the guide rail 3 after being compressed, thereby further preventing slippage.

[0054] As another embodiment further provided by the present invention, the transmission rod 10 is slidably disposed on the simulation transmitter 5 and cooperates with the rotating wheel 6 in a blocking manner.

[0055] Specifically, the transmission rod 10 is L-shaped, and its initial height is close to the bottom of the rotating wheel 6. When the rotating wheel 6 moves downward, it pushes the transmission rod 10 to move downward synchronously, and the guide groove 11 provided on the transmission rod 10 drives the clamping member 16 away from the brake disc 12. The brake disc 12 moves upward under the elastic traction of the first spring 13, driving the rotating rod 14 to flip to an inclined state. When it needs to be restored to the default state, the rotating rod 14 is rotated and restored to a horizontal state, driving the two brake discs 12 to be horizontal and maintain a certain distance. The clamping member 16 is extended toward one of the brake discs 12 by the elastic force of the second spring 17, so that the brake disc 12 is locked in a horizontal state, and the clamping member 16 drives the transmission rod 10 to move upward and restore to its initial height through the sliding cooperation of the transmission rod 10.

[0056] As another embodiment further provided by the present invention, an anode plate 18 and a cathode plate 19 are respectively provided on the two brake discs 12, and the anode plate 18 and the cathode plate 19 are located on the timing module loop.

[0057] Specifically, when the rotating rod 14 is deflected from the horizontal direction to the inclined direction, the distance between the two brake discs 12 is shortened, and at the same time, the anode plate 18 and the cathode plate 19 are close to each other and connected to the circuit. The timing module receives the electrical signal and stops timing, thereby realizing automatic timing of each ejection time, which is more accurate.

[0058] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A method for testing an electromagnetic catapult, comprising an electromagnetic catapult (1), a simulation launcher (5), a timing module arranged on the simulation launcher (5), and a grating launcher (2), characterized in that: The following steps are involved: Step 1: placing the simulated launcher (5) at the launch end of the electromagnetic catapult (1), and starting the electromagnetic catapult (1), the grating launcher (2), and the timing module; Step 2: The simulated transmitter (5) is ejected, during which the grating transmitter (2) intermittently sends a light signal with a fixed period of seconds. After the light signal is transmitted to the simulated transmitter (5), it is reflected back and the reflected signal is transmitted to the receiving end of the grating transmitter (2) for distance measurement, and the value of each distance measurement is recorded; Step 3: The simulated launcher (5) stops moving, and the timing module stops timing. The stop position at this time is the end position of the current ejection experiment. The ejection length is recorded. An acceleration function model is constructed according to the length of each cycle of the grating launcher (2), the distance change recorded within the cycle, and the weight of the simulated launcher (5), and the ejection acceleration is recorded. Step 4: Add a simulated launcher (5) with a load and repeat the ejection test to obtain stable ejection length, time, and acceleration data.

2. The electromagnetic catapult testing method according to claim 1, characterized in that: It also includes a guide rail (3) arranged on the launch path; A reflector (4) disposed on the simulation emitter (5) and used to reflect the light emitted by the grating emitter (2); An inner wheel (9) is rotatably arranged on the simulation transmitter (5), wherein a plurality of sawtooth blocks (92) are arranged in a circular array on the inner wheel; A limiting member (8) is slidably arranged on the simulation transmitter (5) and is tangent to the sawtooth block (92). When the inner wheel (9) rotates, the limiting member (8) and the sawtooth block (92) are interlaced.

3. The electromagnetic catapult testing method according to claim 2, characterized in that: It also comprises a support rod (7) for supporting the simulated transmitter (5), and a blocking block (71) for limiting the position-limiting member (8) is arranged on the support rod (7).

4. The electromagnetic catapult testing method according to claim 2, characterized in that: A rotating wheel (6) is slidably sleeved on the inner wheel (9), and an inclined block (91) for guiding the rotating wheel (6) is fixedly arranged on the simulation transmitter (5).

5. The electromagnetic catapult testing method according to claim 2, characterized in that: Also included is a brake assembly, which includes a brake disc (12) for pressing against the guide rail (3).

6. The electromagnetic catapult testing method according to claim 5, characterized in that: The brake discs (12) are symmetrically arranged on both sides of the guide rail (3), and a rotating rod (14) is arranged between the two brake discs (12), and the rotating rod (14) switches between a horizontal state and an inclined state.

7. The electromagnetic catapult testing method according to claim 6, characterized in that: A clamping piece (16) for limiting the rotating rod (14) to a horizontal state is slidably provided on the simulation transmitter (5), and a transmission rod (10) slidably matched with the clamping piece (16) is provided on the simulation transmitter (5).

8. The electromagnetic catapult testing method according to claim 7, characterized in that: The transmission rod (10) is slidably arranged on the simulation transmitter (5) and is engaged with the rotating wheel (6).

9. The electromagnetic catapult testing method according to claim 5, characterized in that: An anode plate (18) and a cathode plate (19) are respectively arranged on the two brake discs (12), and the anode plate (18) and the cathode plate (19) are located on a timing module loop.

10. The electromagnetic catapult testing method according to claim 5, characterized in that: A suction cup (121) is provided on the side of the brake disc (12) facing the guide rail (3).

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