Safety control method for artillery test

Abstract

The invention discloses an artillery test safety control method. The method comprises the following steps: after information setting, entering bullet loading locking; the loading locking time is delayed by loading locking; emission identification: judging whether an overload condition of shell emission is met or not according to an overload signal acquired by the MEMS acceleration sensor, and judging that the shell is emitted after the condition is met; locking in the chamber: delaying the locking time Tb after the shell is launched, and keeping the fuze in a safe state within the delay time; after locking is finished, whether the shell flies away from the gun barrel or not is judged according to an overload signal collected by the MEMS acceleration sensor; if it is not confirmed that the shell flies away from the gun barrel, the fuze is still kept in the safe state; if yes, the shell flies away from the gun barrel. Based on an MEMS acceleration sensor, the overload characteristic of a launching environment is sensed in an artillery test, and the launching state of a shell is identified; time locking and flight overload confirmation are adopted, and the safety state of the fuze in a bore and after the fuze goes out of a gun muzzle is achieved; safety control requirements of artillery tests are met, and meanwhile hardware cost is not increased.

Description

Technical Field

[0001] The invention belongs to the technical field of artillery test fuzes, and in particular relates to a method for controlling the safety of artillery tests. Background Art

[0002] Missile penetration fuzes generally use MEMS acceleration sensor technology to perform software algorithm processing on signals such as penetration overload to achieve precise detonation control functions. During the development process of penetration fuzes, it is often necessary to conduct multiple rounds of scaled-down artillery tests to assess the functions and performance of software and hardware. Artillery tests require that the fuze is in a safe state during shell loading, shell firing, in the barrel after firing, and within a certain flight distance after exiting the muzzle. Compared with formal status products, general test fuzes have an additional in-bore switch as a launch sensitive element, and the launch status of the shell is identified by the closure of the switch. The design of adding an in-bore switch changes the fuze structure and increases the cost of the test fuze. Summary of the invention

[0003] The purpose of the present invention is to solve the above technical problems and provide a gun test safety control method that can meet the gun test safety control requirements and does not increase hardware costs.

[0004] To achieve the above object, the present invention provides a method for safety control of artillery test as follows:

[0005] Information setting: After information setting, the loading lock is entered. The setting information of information setting includes the launch identification time window Win, the average overload Ga, the loading lock time Ta and the chamber lock time Tb;

[0006] Loading lock: After the information is loaded, the loading lock time Ta is delayed. During the loading lock time, the fuze remains in a safe state. After the loading lock time ends, it enters the launch identification;

[0007] Launch identification: Determine whether the overload conditions for projectile launch are met based on the overload signal collected by the MEMS acceleration sensor. If the conditions are met, it is determined that the projectile has been launched and enters the lock state;

[0008] Locking in the chamber: After the shell is fired, the chamber is locked for a time Tb, during which the fuze remains in a safe state.

[0009] Leaving the gun confirmation: After the internal locking is completed, it is judged whether the shell has flown out of the barrel based on the overload signal collected by the MEMS acceleration sensor; if it is not confirmed that the shell has flown out of the barrel, the fuze will remain in the safe state; if it is confirmed that the shell has flown out of the barrel, the fuze will be switched from the safe state to the ready-to-trigger state.

[0010] Further, the information setting process is to judge and confirm the setting information. When any setting information is less than the default value, the default value is taken as the setting information; when any setting information is greater than or equal to the default value, the setting information is taken; after the information setting is completed, the launch identification is entered.

[0011] Further, the default value of the launch identification time window Win is 1.5 ms, the default value of the average overload Ga is 1800 g, the default value of the loading and locking time Ta is 3600 s, and the default value of the in-bore locking time Tb is 10 ms.

[0012] Further, the loading and locking starts to delay after the information setting, and the delay time is the loading and locking time Ta.

[0013] Further, the specific process of judging whether the overload condition for shell launch is satisfied is as follows:

[0014] Calculate the sum A of the negative overload signals collected by the MEMS acceleration sensor within the launch identification time window Win. If A > N × Ga, it is judged that the overload energy satisfies the overload condition for shell launch, and it is confirmed that the shell has been launched, and this moment is taken as the locking timing zero point T0.

[0015] Further, the calculation formula for the sum A of the negative overload signals collected by the MEMS acceleration sensor within the launch identification time window Win is:

[0016] where N is the number of all negative overload signal sampling points within the launch identification time window Win, S(i) is the absolute value of the negative overload signal sampling point value, is the sum of all negative overload signal sampling points S(i) within the launch identification time window Win.

[0017] Further, the in-bore locking process starts to delay from the timing zero point T0, and the delay time is the in-bore locking time Tb.

[0018] Further, the process of judging whether the shell has left the gun barrel according to the overload signal collected by the MEMS acceleration sensor after the in-bore locking is completed is as follows: calculate the sum A of the negative overload signals collected by the MEMS acceleration sensor within the launch identification time window Win. If A < N × 300 g, it is confirmed that the shell has left the gun barrel, and the fuse is switched from the safe state to the waiting-to-trigger state; otherwise, continue sampling and calculating the sum A, and the fuse remains in the safe state until the condition A < N × 300 g is satisfied.

[0019] Further, the calculation formula for the sum A of the negative overload signals collected by the MEMS acceleration sensor within the launch identification time window Win is:

[0020] Where N is the number of all negative overload signal sampling points within the emission identification time window Win, S(i) is the absolute value of the negative overload signal sampling point value, It is the cumulative sum of all negative overload signal sampling points S(i) within the emission identification time window Win.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention is based on the MEMS acceleration sensor, which senses the overload characteristics of the launch environment in the artillery test and identifies the launch status of the artillery shell; time locking and flight overload confirmation are adopted to achieve the safe state of the fuze in the barrel and after exiting the muzzle; the safety control requirements of the artillery test are met without increasing the hardware cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the process of the present invention;

[0023] Figure 2 It is a flowchart of the information setting process in the present invention;

[0024] Figure 3 It is a schematic diagram of the process of loading and locking in the present invention;

[0025] Figure 4 It is a flow chart of the emission identification process in the present invention;

[0026] Figure 5 It is a schematic diagram of the process of locking in the middle chamber of the present invention;

[0027] Figure 6 It is a flow chart of the process of confirming the separation of the gun in the present invention. DETAILED DESCRIPTION

[0028] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention.

[0029] like Figures 1 to 6 The safety control method for the artillery test is as follows:

[0030] Information setting: The setting information of information setting includes the launch identification time window Win, the average overload Ga, the loading lock time Ta and the chamber lock time Tb. After the information is set, the loading lock is entered;

[0031] The information setting process is to judge and confirm the setting information. When any setting information is less than the default value, the default value is used as the setting information; when any setting information is greater than or equal to the default value, the setting information is used; information setting only needs to be performed once. When the information setting is completed, the loading lock is entered. The default value of the launch identification time window Win is 1.5ms, the default value of the average overload Ga is 1800g, the default value of the loading lock time Ta is 3600s, and the default value of the in-barrel lock time Tb is 10ms.

[0032] Loading lock: After the information is loaded, the loading lock time Ta is delayed. During the loading lock time, the fuze remains in a safe state, and after the delay time ends, it enters the launch identification;

[0033] Launch identification: Based on the overload signal collected by the MEMS acceleration sensor, it is determined whether the overload condition for the shell launch is met. If the condition is met, it is determined that the shell has been launched and locked in the chamber;

[0034] The specific process of judging whether the overload conditions for shell launch are met is as follows:

[0035] Calculate the cumulative sum A of the negative overload signals collected by the MEMS acceleration sensors within the launch identification time window Win. If A>N×Ga, it is judged that the overload energy meets the overload condition for the shell launch, and it is confirmed that the shell has been launched. This moment is used as the lock timing zero point T0.

[0036] The calculation formula of the cumulative sum A of the negative overload signals collected by the MEMS acceleration sensor within the emission identification time window Win is:

[0037] Where N is the number of all negative overload signal sampling points within the emission identification time window Win, S(i) is the absolute value of the negative overload signal sampling point value, It is the cumulative sum of all negative overload signal sampling points S(i) within the emission identification time window Win.

[0038] In-bore locking: After the shell is fired, the delay starts from the timing zero point T0. The delay time is the in-bore locking time Tb. During the delay time, the fuze remains in a safe state. After the delay ends, it enters the gun departure confirmation process.

[0039] Leaving the gun confirmation: After the locking is completed, it is judged whether the shell has flown out of the gun barrel based on the overload signal collected by the MEMS acceleration sensor; if it is not confirmed that the shell has flown out of the gun barrel, the fuze will remain in the safe state; if it is confirmed that the shell has flown out of the gun barrel, the fuze will be switched from the safe state to the ready-to-trigger state.

[0040] After the in-bore locking is completed, the process of determining whether the projectile has left the barrel based on the overload signal collected by the MEMS acceleration sensor is as follows: Calculate the sum A of the negative overload signals collected by the MEMS acceleration sensor within the launch identification time window Win. If A < N × 300g, it is confirmed that the projectile has left the barrel, and the fuse is switched from the safe state to the armed state; otherwise, continue sampling and calculating the sum A, and the fuse remains in the safe state until the condition A < N × 300g is met.

[0041] The calculation formula for the sum A of the negative overload signals collected by the MEMS acceleration sensor within the launch identification time window Win is:

[0042] where N is the number of sampling points of all negative overload signals within the launch identification time window Win, and S(i) is the absolute value of the sampling point value of the negative overload signal. is the sum of all sampling points S(i) of the negative overload signals within the launch identification time window Win.

[0043] The above are only embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, various changes and modifications can be made to the present invention. Any modification or equivalent replacement made within the spirit and principle of the present invention.

Claims

1. A method for safety control of artillery testing, characterized in that: The safety control method for artillery tests is as follows: Information setting: After information setting, it enters the loading and locking process. The set information for information setting includes the launch identification time window Win, average overload Ga, loading and locking time Ta, and in-bore locking time Tb; Loading and locking: After information setting, it delays for the loading and locking time Ta. During the loading and locking time, the fuse remains in a safe state. After the loading and locking time ends, it enters the launch identification; Launch identification: It determines whether the overload condition for the shell launch is met based on the overload signal collected by the MEMS acceleration sensor. After meeting the condition, it determines that the shell has been launched and enters the locking state; In-bore locking: After the shell is launched, it delays for the in-bore locking time Tb. During the in-bore locking time, the fuse remains in a safe state; Confirmation of leaving the gun: After the in-bore locking ends, it determines whether the shell has left the gun barrel based on the overload signal collected by the MEMS acceleration sensor; If it is not confirmed that the shell has left the gun barrel, the fuse still remains in a safe state; If it is confirmed that the shell has left the gun barrel, the fuse is switched from the safe state to the waiting-to-trigger state.

2. The artillery test safety control method according to claim 1, characterized in that: The information setting process is to judge and confirm the set information. When any set information is less than the default value, the default value is taken as the set information; When any set information is greater than or equal to the default value, the set information is taken; After the information setting is completed, it enters the launch identification.

3. The artillery test safety control method according to claim 2, characterized in that: The default value of the launch identification time window Win is 1.5 ms, the default value of the average overload Ga is 1800 g, the default value of the loading and locking time Ta is 3600 s, and the default value of the in-bore locking time Tb is 10 ms.

4. The artillery test safety control method according to claim 1, characterized in that: The loading and locking starts to delay after information setting, and the delay time is the loading and locking time Ta.

5. The artillery test safety control method according to claim 1, characterized in that: The specific process of judging whether the overload condition for the shell launch is met is as follows: Calculate the cumulative sum A of the negative overload signals collected by the MEMS acceleration sensor within the launch identification time window Win. If A > N×Ga, it is judged that the overload energy meets the overload condition for the shell launch, and it is confirmed that the shell has been launched. This moment is taken as the locking timing zero point T0.

6. The artillery test safety control method according to claim 5, characterized in that: The calculation formula of the cumulative sum A of the negative overload signals collected by the MEMS acceleration sensor within the emission identification time window Win is: Where N is the number of all negative overload signal sampling points within the emission identification time window Win, S(i) is the absolute value of the negative overload signal sampling point value, It is the cumulative sum of all negative overload signal sampling points S(i) within the emission identification time window Win.

7. The artillery test safety control method according to claim 5, characterized in that: The in-bore locking process starts to delay from the timing zero point T0, and the delay time is the in-bore locking time Tb.

8. The artillery test safety control method according to claim 1, characterized in that: The process of determining whether the shell has left the gun barrel based on the overload signal collected by the MEMS acceleration sensor after the in-bore locking ends is as follows: Calculate the cumulative sum A of the negative overload signals collected by the MEMS acceleration sensor within the launch identification time window Win. If A < N×300 g, it is confirmed that the shell has left the gun barrel, and the fuse is switched from the safe state to the waiting-to-trigger state; Otherwise, continue sampling and calculating the cumulative sum A, and the fuse remains in a safe state until the condition A < N×300 g is met.

9. The artillery test safety control method according to claim 8, characterized in that: The calculation formula of the cumulative sum A of the negative overload signals collected by the MEMS acceleration sensor within the emission identification time window Win is: Where N is the number of all negative overload signal sampling points within the emission identification time window Win, S(i) is the absolute value of the negative overload signal sampling point value, It is the cumulative sum of all negative overload signal sampling points S(i) within the emission identification time window Win.

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