Electronic Self-Destructing Fuse for 40 mm Grenade Safety
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Solution Overview
Problem
Existing 40 mm grenade fuses have low operational reliability, leading to undetonated grenades, especially in environments with weak impact, such as grass or mud, and pose safety risks to soldiers and civilians.
Innovation Solution
An electronic self-destructing fuse structure with a substrate module, conductive wires, and safety structures that utilize centrifugal force and impact weights to ensure detonation under predetermined conditions and self-destruction, including a reserve battery for power activation and an electric detonator for reliable detonation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a mechanical fuse mechanism is used to detect impact and detonate the grenade, then the grenade can detonate upon impact, but the structural complexity increases and operational reliability decreases
Solution Approach 1:
The patent replaces the traditional mechanical fuse mechanism with an electronic detection system. The mechanical impact detection is substituted with electronic sensors and circuits that detect impact forces and trigger detonation electronically, thereby reducing mechanical complexity while improving reliability through electronic control systems.
Solution Approach 2:
The patent introduces electronic intermediary components between the impact event and the detonation mechanism. Instead of direct mechanical transmission, electronic sensors act as intermediaries to detect impact and activate the detonator through electrical signals, reducing the complexity of direct mechanical linkages.
2Object-affected harmful factors
If a safety device is provided to prevent detonation within safe distance after firing, then safety is secured, but the device complexity increases
Solution Approach 1:
The patent replaces mechanical safety devices with electronic safety control systems. Electronic sensors and control circuits monitor the grenade's flight status and prevent detonation until safe conditions are met, reducing mechanical complexity while maintaining safety through electronic control.
Solution Approach 2:
The patent implements electronic feedback mechanisms that continuously monitor flight conditions and provide feedback to the detonation control system. This feedback loop ensures that detonation only occurs when safety conditions are satisfied, replacing complex mechanical safety interlocks with simpler electronic monitoring and control.
3Reliability
If the grenade is designed to detonate only under strong impact, then safety during firing is improved, but the grenade may fail to detonate in environments with weak impact such as grass or mud
Solution Approach 1:
The patent employs electronic impact detection with adjustable sensitivity thresholds that can adapt to different environmental conditions. The electronic sensor system can detect a wider range of impact forces compared to mechanical mechanisms, and the detection parameters can be adjusted to ensure reliable detonation whether the impact is strong or weak, thereby improving both reliability and environmental adaptability.
Solution Approach 2:
The patent uses electronic sensors with different detection characteristics positioned at various locations to detect impact from different directions and intensities. This localized electronic detection approach ensures that the grenade can reliably detect and respond to impacts of varying strengths depending on the environmental conditions, unlike uniform mechanical mechanisms.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Significantly reduces the occurrence of undetonated grenades by ensuring detonation upon impact and self-destruction through electronic circuit operation, enhancing safety and operational reliability.
Implementation Method 1
a centrifugal force weight configured to be moved outwards from a center by centrifugal force and to short-circuit the first conductive wire
Implementation Method 2
an impact weight configured to ascend and descend by inertia and to short-circuit the second conductive wire
Implementation Method 3
the first through-hole having a reserve battery mounted therein to be activated when struck by the first pin
Data Source
AI summary
The present invention relates to an electronic self-destructing fuse structure which releases a safety device by means of a predetermined level of setback and centrifugal force after a 40 mm grenade is launched, thereby ensuring safety, and which can explode according to the application of an impact of a predetermined level or higher, and also self-destruct after a predetermined time elapses if the impact does not reach the predetermined level and an explosion does not occur, thereby preventing the occurrence of an unexploded grenade.