WO2022041649A1

WO2022041649A1 - Modular multi-stage coil gun

Info

Publication number: WO2022041649A1
Application number: PCT/CN2021/074077
Authority: WO
Inventors: 祝凌云
Original assignee: 祝凌云
Priority date: 2020-08-25
Filing date: 2021-01-28
Publication date: 2022-03-03
Also published as: CN114087919A

Abstract

A modular multi-stage coil gun, comprising: a plurality of propulsion modules (3), a projectile body (6), a battery (1), a controller (2), and a temperature sensor (5), wherein each propulsion module is connected to the controller (2) by using a bus (4); and each propulsion module comprises a propulsion coil (204), a position sensor, a microprocessor, an address coding switch, and a current switch assembly. By means of the mode, a basic firing function is realized, and the functions of firing rate adjustment, power adjustment, temperature control, and self-checking are also provided, thereby improving the system reliability, extendibility, and practicability.

Description

A modular multistage coil gun

technical field

The invention belongs to the field of electromagnetic launch, in particular to a modular multi-stage coil gun.

Background technique

Generally speaking, electromagnetic guns are coil guns, which are usually used for physics teaching or research.

At present, the commonly used implementation method is to charge the capacitor after the battery is boosted, and then use a thyristor or a field effect transistor as an electronic switch to instantly release the electrical energy stored in the capacitor into the coil, thereby forming a strong magnetic field to attract the projectile.

This type of implementation mainly has the following shortcomings. The use of capacitor energy storage requires a long charging process and cannot be continuously fired in a short time; it cannot precisely control the opening and closing timing of the current in the coil, resulting in insufficient acceleration or even deceleration; The acceleration systems do not communicate with each other and cannot effectively make adaptive adjustments. For example, if a certain stage fails, the latter stage cannot make timing adjustments.

SUMMARY OF THE INVENTION

In order to solve the above-mentioned deficiencies of the prior art, the present invention provides a modular multi-stage coil gun, which has the characteristics of high firing rate, adjustable firing rate and power, and high reliability.

In order to achieve the above purpose, the specific technical scheme adopted is: a modular multi-stage coil gun, which is mainly composed of a projectile body, a plurality of propulsion modules, a battery pack, a controller, and a temperature sensor, and each propulsion module and the controller use a bus. connect.

The projectile body adopts a ferromagnetic body, which can be attracted by magnetic force. The material can be iron, cobalt, nickel, or an alloy containing iron, cobalt, and nickel. The shape of the projectile is a revolving body in the launching direction, such as a cylinder, or a non-revolving body, such as a pie shape and a cuboid; for a non-revolving body, since the shape is not annularly symmetrical relative to the launching direction, it is more susceptible to air disturbance after launch and form a large shape. It can cover a larger area when firing continuously at high speed, and can effectively increase the hit probability at close range.

The propulsion module is mainly composed of a propulsion coil, a position sensor, a microprocessor, an address coding switch, and a current switch assembly; the address coding switch is used to determine the address of this module, and different modules have different addresses. For the information on the bus, such as where When the address information of the module is the same as the address of the module, it will be executed as an instruction, otherwise it will not be processed; after receiving the work instruction on the bus, the microprocessor will turn on the electronic switch to supply power to the coil, and turn on the position sensor to the projectile. The position of the coil is observed in real time, and at the position where the projectile can leave at the maximum speed (usually this position is near the middle of the coil), the electronic switch is turned off to stop the power supply to the coil, and the feedback of the execution result is sent to the bus; the shape of the propulsion coil is also A body of revolution or non-rotation in the direction of emission.

The position sensor is an important part of the propulsion module, which is used for real-time and high-precision observation of the position of the projectile; the sensor is composed of two sets of coils with opposite winding directions and the same number of turns in series, located between the propulsion coil and the projectile launcher. Between the space envelopes formed, they are placed in sequence along the launch direction; when the propulsion coil works, a magnetic flux will be generated. When the projectile does not enter, the magnetic flux passing through the two sensor coils is the same, because the two coils of the sensor are wound in opposite directions. , the electromotive force generated by the change of magnetic flux cancels each other out, and the output electromotive force is zero; when the projectile made of ferromagnetic material enters, due to the sequence of passing through the two sensor coils, the change of the magnetic flux through the two sensor coils will no longer be the same, and the generated electromotive force Can not be completely offset, so the electromotive force is output, and the size and phase of the electromotive force can be detected to determine the precise position of the projectile; the shape of the sensor coil is also a revolving body or a non-revolving body along the launching direction.

The battery pack uses cells with extremely low internal resistance. This is because the coil requires hundreds of thousands or even tens of thousands of amps of current. Generally, the internal resistance of the cells is relatively high, which will cause a large voltage drop during operation, which cannot be Sufficient current is provided; the battery pack directly supplies power to the propulsion coil, and does not use the intermediate link of capacitor energy storage, which greatly reduces the time interval caused by charging between two launches.

The controller is connected to multiple propulsion modules through the bus, and information exchange can be achieved with each other; the main contents transmitted in the bus are: the address of the propulsion module, work instructions, execution results, self-check information, and fault codes; When launching, the controller sends work instructions to each propulsion module in turn according to a certain sequence, so as to complete the multi-stage continuous propulsion of the projectile. At the same time, according to the execution results fed back by the propulsion module, the sequence is adjusted and optimized to improve the launch efficiency. ; Repeating this sequence of instructions continuously can achieve multiple continuous launches, and changing the frequency of this repeating process can adjust the rate of fire; if the controller changes the number and timing of the propulsion modules involved in the work, the kinetic energy of the projectile can be changed, Realize the adjustment of transmission power; reducing the transmission power means that some modules do not work during a single transmission. For this, in the process of multiple continuous transmissions, according to the principle that the number of operations of each module is the same or close, let They work alternately to achieve a balance of heat generation, which can improve stability and prolong service life; when the system is turned on, the propulsion module will perform a self-check and send the self-check information to the bus. After receiving the information, the controller will disable this module during the transmission process, and adjust the transmission timing adaptively to ensure that the overall system can continue to work without being affected. If the module fails during the working process, a fault code will be sent. , the controller will also make adjustments to disable the module to ensure that the system can continue to run.

The temperature sensor feeds the collected temperature back to the controller. When the temperature is too high, which may affect the normal operation of the system, the controller will actively limit the firing rate and power to ensure that the temperature will not continue to rise.

The beneficial effects of the present invention are:

1. The battery pack directly supplies power to the coil, and does not use the intermediate link of capacitor energy storage, which greatly reduces the time interval caused by charging between two launches, so that high-speed continuous transmission can be achieved.

2. The bus system can realize the interaction between the propulsion module and the controller, coordinate the control logic in real time to achieve the optimal working state, and at the same time make timely responses and adjustments to the faults that occur.

3. Compared with the traditional photoelectric position sensor that can only detect one position, the sensor used in the propulsion module can detect the position of the projectile in the propulsion coil in real time; at the same time, it does not need to be in the launch pipeline like the photoelectric sensor. The upper opening affects the structure of the emission pipe, which improves the overall strength and sealing performance. In addition, it is hardly affected by external factors such as light and temperature, and the reliability and stability are greatly improved.

4. The synchronous coil gun belongs to the smoothbore type launching device without internal rifling. The cylindrical projectile of the traditional revolving body has the shortcomings of insufficient accuracy at long distances and insufficient dispersion at close distances. The non-revolving projectile used in the invention is a pie type. Or cuboid, it is more susceptible to air disturbance after exiting the chamber, and can form a larger scattering angle, which can effectively increase the probability of a large hit at close range.

5. The modular structure cooperates with the bus system, which has stronger adaptive performance and can easily expand the number of firing stages, which paves the way for the practical and commercialization of multi-stage coil guns.

Description of drawings

Figure 1 is a block diagram of the system configuration.

Figure 2 is a schematic diagram of the composition of the position sensor.

In the figure: 1, battery; 2, controller; 3, propulsion module; 4, bus; 5, temperature sensor; 6, projectile; 201, sensor coil 1; 202, sensor coil 2; 203, connection point; 204, Advance the coil.

detailed description

The present invention will be described below with reference to the accompanying drawings.

Figure 1 is a block diagram of the system structure. The battery 1 supplies power to the propulsion module 3 and the controller 2. The controller 2 and the propulsion module 3 are connected through the bus 4, and the temperature sensor 5 is connected to the controller 2. When the controller 2 is connected to the propulsion module through the bus 4 3 When the launch command is sent, the projectile 6 can be launched; the propulsion module 3 and the bus 4 can be expanded to achieve multi-stage continuous propulsion.

FIG. 2 depicts the position sensor in the propulsion module 3 . The position sensor consists of a sensor coil 201 and a sensor coil 202 , which are connected in series through a connection point 203 and placed in the propulsion coil 204 .

Claims

A coil gun propulsion module is characterized in that: it includes a propulsion coil, a position sensor, a microprocessor, an address coding switch, and a current switch assembly; the microprocessor can control the current switch assembly to perform current on and off operations on the coil, and can The position of the projectile body in the coil can be judged in real time according to the position sensor, and the module identification address set by the address coding switch can be read.
A coil gun propulsion module according to claim 1, characterized in that: the position sensor is composed of two sets of coils, located inside the propulsion coils, placed in sequence along the axial direction of the propulsion coils, and the two sets of coils are wound in opposite directions and are connected in series.
A coil gun propulsion module according to claim 1, wherein the shape of the propulsion coil and the position sensor is a revolving body or a non-revolving body along the launching direction.
A modular multi-stage coil gun is characterized by comprising a plurality of propulsion modules, projectiles, batteries, controllers, and temperature sensors as claimed in claim 1, and each propulsion module and the controller are connected using a bus.
A modular multi-stage coil gun according to claim 4, wherein the propulsion coil in the propulsion module is directly powered by a battery.
A modular multi-stage coil gun according to claim 4, characterized in that: the content transmitted by the bus includes the address of the propulsion module, the current turn-on command, the current turn-off feedback, the self-check information, and the fault code.
A modular multi-stage coil gun according to claim 4, wherein the controller adjusts the firing rate by changing the frequency of the current turn-on command sequence, and adjusts the firing power by changing the number of addresses of the propulsion modules corresponding to the turn-on command.
A modular multi-stage coil gun according to claim 4, characterized in that: the controller obtains the temperature through a temperature sensor, reduces the rate of fire and the launch power when overheating, and alternately uses different propulsion modules to avoid excessive temperature rise.
A modular multi-stage coil gun according to claim 4, wherein the projectile body is a ferromagnetic body, and the material is one of iron, cobalt and nickel.
A modular multi-stage coil gun according to claim 4, characterized in that: the shape of the projectile body is a revolving body or a non-revolving body in the firing direction, and is one of a cylinder and a rectangular parallelepiped.