Electronic Hand Grenade with Accelerometer Timing
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Solution Overview
Problem
Conventional hand grenades have an unpredictable detonation delay, which can result in the grenade not detonating in time or exploding too close to the user, posing risks of injury or death.
Innovation Solution
An electronically activated hand grenade equipped with an accelerometer, microcontroller, and detonator that detects acceleration and distance traveled to ensure detonation only occurs after a safe distance is reached, preventing accidental detonation if thrown or rolled inadequately.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a chemical delay element is used to provide detonation delay, then the grenade can be thrown with adequate time, but the exact delay time is not precise and unpredictable
Solution Approach 1:
The patent replaces the mechanical/chemical delay system with an electronic timing system. A microcontroller unit (MCU) with an internal timer replaces the chemical delay element, providing precise and predictable detonation timing. The electronic timer can be programmed to trigger the detonator at exactly the desired time interval after pin removal, eliminating the variability inherent in chemical burn rates.
Solution Approach 2:
The patent incorporates an accelerometer that provides feedback to the MCU about the grenade's motion state. The accelerometer detects whether the grenade is being thrown or dropped, and this information feeds back to the control logic to determine whether to initiate detonation. This feedback mechanism ensures reliable operation by confirming the grenade is in the intended trajectory before detonating.
2Speed
If the chemical delay element burns down quickly, then the grenade detonates fast, but the enemy may have time to retrieve and throw it back
Solution Approach 1:
The accelerometer provides real-time feedback about the grenade's motion and position. The control logic processes this feedback to determine if the grenade has traveled a sufficient distance from the user before detonating. This ensures that even with fast detonation timing, the grenade only explodes when it is at a safe distance, preventing the enemy from retrieving and throwing it back.
Solution Approach 2:
The patent makes the detonation decision dynamic rather than static. Instead of relying solely on a fixed time delay, the system continuously monitors acceleration data and adjusts the detonation decision based on the grenade's actual motion trajectory and distance traveled. This dynamic approach ensures safe distance assurance while maintaining fast detonation capability.
3Object-affected harmful factors
If the grenade is thrown not far enough, then the user is at risk of injury, but extending the delay time increases the risk of enemy retrieval
Solution Approach 1:
The accelerometer continuously monitors the grenade's motion and provides feedback to the control logic about distance traveled. This real-time information allows the system to make an informed decision about when to detonate, ensuring the grenade has traveled far enough to be safe while minimizing the delay time to prevent enemy retrieval. The feedback loop optimizes the balance between user safety and time constraints.
Solution Approach 2:
The patent changes the parameter used to trigger detonation from a fixed time-based parameter to a position/distance-based parameter. By monitoring acceleration data to calculate distance traveled, the system can adjust the detonation timing parameter dynamically to ensure safe distance is achieved while keeping the actual delay time as short as possible.
4Measurement precision
If an electronic detonation unit with accelerometer and microcontroller is added, then precise detonation control is achieved, but the device complexity increases
Solution Approach 1:
The microcontroller unit serves multiple functions: it acts as a precise timer for detonation timing, processes accelerometer data to detect motion type, determines distance traveled, and controls the detonator trigger. By consolidating these multiple functions into a single electronic control unit, the patent achieves high measurement precision while limiting the increase in overall device complexity.
Solution Approach 2:
The patent combines the timer, accelerometer processor, and detonator control into a single integrated electronic control system. This merging of functions into one compact unit minimizes the added complexity compared to having separate mechanical components for each function. The electronic integration allows precise detonation control without proportionally increasing the grenade's overall structural complexity.
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
The electronic hand grenade provides precise and safe detonation, minimizing the risk of injury to the user and preventing detonation if not thrown or rolled far enough, thus enhancing user safety and preventing enemy retrieval and counter-attack.
Implementation Method 1
An electronically activated hand grenade (100) includes a body (112) having at least one charge (114) therein, an electronic detonation unit (120) attached to the body (112) for detonating the at least one charge (114), and a pull pin (126) removably attached to the electronic detonation unit (120), for activating the electronic detonation unit (120) upon removal thereof
Data Source
AI summary
An electronic hand grenade is provided, which includes a body having at least one charge therein. An electronic detonation unit is attached to the body for detonating the at least one charge. A pull pin is removably attached to the electronic detonation unit, for activating the electronic detonation unit upon removal thereof. The electronic detonation unit includes an accelerometer for detecting movement and acceleration of the body, a controller containing an operating program for controlling operation of the electronic detonation unit, a detonator for providing a spark to ignite the at least one charge, and a power source for powering the electronic detonation unit.