Fault safety design method for MEMS (Micro Electro Mechanical System) safety device
By integrating a fail-safe design lock hook on the recoil safety device and explosion-proof slider of the MEMS fuse release device, the problem of untimed release and accidental explosion of the MEMS fuze release device is solved, and safety and reliability are improved.
Patent Information
- Application Number
- CN202510890345.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Priority Date
- 2025-06-11
- Filing Date
- 2025-06-30
- Publication Date
- 2025-09-16
AI Technical Summary
Existing MEMS fuze safety devices lack a fail-safe design, which may lead to the risk of accidental explosion, especially when the safety device is not released in time.
The introduction of a recoil safety device in the MEMS safety device and an integrated fail-safe lock hook on the explosion-proof slider limit the freedom of movement through the U-shaped interlocking principle to ensure strict control of the isolation release timing.
The safety of the MEMS safety device is ensured, the risk of accidental explosion caused by the lack of timing insurance is avoided, the failure rate is reduced without the need for new components, and reliability is improved.
Smart Images
Figure CN120651071A_ABST
Abstract
Description
Technical Field
[0001] The present invention belongs to the field of micro-mechanical electronics, and in particular to a fault safety design method for a MEMS safety device. Background Art
[0002] MEMS (Micro-Electro-Mechanical Systems) technology integrates micromechanical structures, microsensors, microactuators, and microelectronic circuits on a single chip. It exemplifies the fusion of micro- and nanotechnology with integrated circuit manufacturing. It is widely used in a variety of fields, including automotive electronics, medical care, communications, aerospace, and consumer electronics. With the increasing complexity of battlefield environments, high-tech weapons utilizing MEMS technology have become increasingly visible. The application of MEMS technology in fuzes has continuously improved the miniaturization and intelligence of fuzes. In recent years, MEMS fuze release devices have developed rapidly, offering advantages such as small size, light weight, and high reliability, and are gradually replacing traditional fuze release devices.
[0003] The recoil safety device typically serves as the first line of defense in the fuze's MEMS safety and arming isolation system, sensing the recoil of the ammunition after firing and enabling the arming action. However, according to the fuze safety requirements of GJB373B, the arming and disarming system typically has two independent safety lines. Once each safety line has been fully disarmed, the explosion-proof slider can align the detonation sequence using centrifugal force or other active actuation methods. During this process, if the safety lines are not released in a strictly sequential manner, the explosion-proof slider could be misaligned before the recoil safety device or the second redundant safety device is released. This could create a serious risk of accidental detonation, potentially endangering the safety of personnel. Currently, however, fail-safe design is primarily used in conventional fuzes, which achieve fail-safety through redundant circuitry or mechanical isolation. However, there is no dedicated fail-safe design method for MEMS fuze arming and disarming systems. Therefore, research on fail-safe design methods for MEMS fuze arming and disarming systems is essential. Summary of the Invention
[0004] The purpose of the present invention is to provide a fault-safe design method for a MEMS safety device, so as to achieve strict timing control of the isolation release of the MEMS safety device and ensure the safety of the fuze MEMS and the isolation release device.
[0005] The technical solutions for achieving the purpose of the present invention are:
[0006] A fail-safe design method for a MEMS safety device includes a recoil safety device as the first line of defense for the MEMS safety device.
[0007] The recoil safety device is provided with a recoil failure safety design lock hook at the side end close to the explosion-proof slider, which can cooperate with the explosion-proof slider fail-safe design lock hook provided at the side end of the explosion-proof slider to limit the movement freedom of the explosion-proof slider in the working direction and perpendicular to the working direction; and can move to the unlocked position and lock with the base plate under the action of recoil force.
[0008] Compared with the prior art, the present invention has the following significant advantages:
[0009] (1) The present invention ensures that the MEMS safety device works strictly according to the timing, and the recoil safety device is strictly released as the first safety, thereby ensuring the safety of the fuze MEMS safety device and avoiding the risk of accidental explosion caused by the safety device without timing safety during service processing.
[0010] (2) Compared with the fail-safe design method of setting up the MEMS safety device by introducing new components, the fail-safe design method proposed in the present invention is directly integrated into the recoil safety device and the flameproof slider, without the need to introduce new components, resulting in a lower failure rate. In addition, the fail-safe design method is implemented through the recoil safety device, the first line of defense of the MEMS safety device, thus ensuring the safety of the fuze immediately. The reliability is higher. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 Schematic diagram of a MEMS security device that applies the fail-safe design method.
[0012] Figure 2 Design detail drawings for fail-safe design.
[0013] Figure 3 Design the active state diagram for fail-safe operation.
[0014] Figure 4 State diagram designed for fail-safe operation during normal unlocking.
[0015] Figure 5 This is the timing working principle diagram of the MEMS security device. DETAILED DESCRIPTION
[0016] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.
[0017] Combine Figure 1 、 Figure 2 This embodiment proposes a fail-safe design method for a MEMS safety device. The following describes a MEMS safety device that utilizes this fail-safe design method. The MEMS safety device comprises a substrate 1, a recoil safety device 2, a command lock safety device 3, an explosion-proof slider 4, and a spring 5.
[0018] The base plate 1 is responsible for carrying, supporting, and assembling the recoil safety device 2, the command lock safety device 3, the flameproof slider 4, and the spring 5. The command lock safety device 3 is integrally formed on the base plate 1 via laser processing. Its specific structure is not the focus of this patent and is not described in detail. The spring 5 is separately assembled on the base plate 1 via laser processing. Its structure is not the focus of this patent and is not described in detail. The specific relationship between the command lock safety device 3 and the spring 5 and the fail-safe design method will be discussed in the working principle.
[0019] The fail-safe design method comprises a recoil fail-safe design hook 2a and a flameproof slider fail-safe design hook 4a, which are integrated into the recoil safety device 2 and flameproof slider 4, respectively. The flameproof slider fail-safe design hook 4a is located at the side of the flameproof slider 4, and the recoil fail-safe design hook 2a is located at the side of the recoil safety device near the flameproof slider. Both the recoil fail-safe design hook 2a and the flameproof slider fail-safe design hook 4a are U-shaped structures, with the openings of the two U-shaped structures facing each other and staggered. During operation, the U-shaped structure interlocks, limiting the freedom of movement in the working direction (sliding direction) and perpendicular to the working direction. The recoil safety device 2 is integrally formed on the base plate 1 via laser processing, with a spring interposed between the base plate 1 and hooks interposed between the base plate and the left and right sides. The flameproof slider 4 is separately assembled on the base plate 1 via laser processing and has a flameproof hole in the middle.
[0020] Combine Figure 3 The working mode of the fail-safe design is introduced. When the command lock safety device 3 is mislocked, the explosion-proof slider 4 moves in the working direction (the spring and the base plate are fixed to each other, and the working direction is the direction of spring expansion) under the action of the spring 5 (energy storage pre-stressed spring 5, released when unconstrained). As the explosion-proof slider 4 moves, since the recoil safety device 2 is in the unlocked state at this time, the recoil fail-safe design lock hook 2a and the explosion-proof slider fail-safe design lock hook 4a will lock with each other. When the recoil fail-safe design lock hook 2a and the explosion-proof slider fail-safe design lock hook 4a lock with each other, the fail-safe design is activated, and the explosion-proof slider 4 is restricted from moving and cannot continue to move in the working direction. At this time, the fuze MEMS safety device ensures safety in abnormal conditions.
[0021] Combine Figure 4 When the recoil safety device 2 is normally unlocked under the action of recoil force, and the command lock safety device 3 is also unlocked, the flameproof slider 4 moves in the working direction under the action of the spring 5. As the flameproof slider 4 moves, the recoil fail-safe design lock hook 2a and the flameproof slider fail-safe design lock hook 4a are not in the same working direction. The recoil fail-safe design lock hook 2a is not locked with the flameproof slider fail-safe design lock hook 4a, that is, it will not hinder the movement of the flameproof slider 4. Therefore, the flameproof slider 4 can continue to move until the explosion transmission sequence is aligned.
[0022] Combine Figure 1 、 Figure 5 The operating principle of the MEMS safety and release device, which utilizes a fail-safe design approach, is as follows: The fuze's MEMS safety and release isolation device receives the release signal and begins to release the fuse. First, when the safety and release device senses the recoil environment, the recoil safety mechanism 2 moves in the direction of the recoil force to the unlocked position and unlocks (while simultaneously locking the position with the locking hook and base plate 1). At this point, the fail-safe design is not restricted. Then, as the real-time trajectory information changes, when the command lock safety mechanism 3 meets the conditions, it receives the signal and unlocks. At this point, the flameproof slider 4 is freed from constraints and moves into position under the action of the spring 5, aligning the detonation sequence. During the safety release process, if the recoil safety device 2 is mistakenly released, the recoil safety device 2 is unlocked, but the command lock safety device 3 is not unlocked, the explosion-proof slider 4 cannot move, and the explosion transmission sequence is not aligned. At this time, the fail-safe design does not work; if the command lock safety device 3 is mistakenly released, the fail-safe design works, and the recoil fail-safe design lock hook 2a and the explosion-proof slider fail-safe design lock hook 4a are locked with each other, and the two lock hooks are in a U-shaped interlocked state. At this time, the recoil fail-safe design lock hook 2a restricts the movement of the explosion-proof slider 4, so the explosion-proof slider 4 cannot Movement, the detonation sequence is not aligned. In this state, if subsequent environmental information causes the recoil safety device 2 to lock, the recoil fail-safe design lock hook 2a can still be locked with the flameproof slider fail-safe design lock hook 4a (the U-shaped interlocking principle adopted by the recoil fail-safe design lock hook 2a and the flameproof slider fail-safe design lock hook 4a can not only limit the movement of the flameproof slider 4 in the working direction, but also limit the movement of the flameproof slider 4 perpendicular to the working direction), ensuring the safety of the release device and avoiding the alignment of the detonation sequence. It is worth emphasizing that this fail-safe design method, that is, the U-shaped interlocking principle integrated in the recoil safety device 2 and the flameproof slider 4, can also be widely used in different types of fuze MEMS release devices.
Claims
1. A fail-safe design method for a MEMS security device, characterized in that: A recoil safety device is provided as the first line of defense for the MEMS safety device; The recoil safety device is provided with a recoil failure safety design lock hook at the side end close to the explosion-proof slider, which can cooperate with the explosion-proof slider fail-safe design lock hook provided at the side end of the explosion-proof slider to limit the movement freedom of the explosion-proof slider in the working direction and perpendicular to the working direction; and can move to the unlocked position and lock with the base plate under the action of recoil force.
2. The fail-safe design method for MEMS security device according to claim 1, characterized in that: The recoil fail-safe design lock hook and the flameproof slide fail-safe design lock hook are both U-shaped structures, and the openings of the two U-shaped structures are opposite and staggered, and the U-shaped structures are interlocked during operation.
3. The fail-safe design method for MEMS security device according to claim 1, characterized in that: The recoil safety device is integrally formed on the base plate by laser processing, a spring is provided between the recoil safety device and the base plate, and locking hooks are provided between the left and right sides and the base plate.
4. The fail-safe design method for MEMS security device according to claim 1, characterized in that: The flameproof sliding block is separately assembled on the base plate through laser processing.
5. The fail-safe design method for MEMS security device according to claim 1, characterized in that: The flameproof slider can move in the working direction under the action of the spring.