Collision sensing device for laser module
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional sweeping robots equipped with laser modules often get stuck when the laser module protrudes and hits an object, as the peripheral sensors fail to effectively sense the collision, leading to the robot being unable to move.
Innovation Solution
A collision sensing device for the laser module, comprising a base, moving seat, linkage body, sensing element, and elastic elements, which allows the moving seat to drive the linkage body to press a sensing part when collided, transmitting collision information to a control unit to facilitate the robot's movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the laser module protrudes from the top surface to perform scanning, then the scanning function is improved, but the robot gets stuck when the laser module hits an object
Solution Approach 1:
The patent introduces a shield body as an intermediary component between the laser module and the external environment. The shield body can move relative to the laser module, providing protection while allowing the laser to scan. When an obstacle is detected, the shield body moves to block the laser, preventing direct contact and potential damage, thus resolving the contradiction between scanning capability and robot mobility reliability.
Solution Approach 2:
The patent implements a dynamic shielding mechanism where the shield body can move between different positions. The shield body is connected to a moving seat that can translate along a guide rail, allowing the system to dynamically adjust the protection level based on environmental conditions. This dynamic adjustment enables the system to maintain both scanning functionality and protection against obstacles.
2Reliability
If a shield body is added to protect the laser module, then the protection function is improved, but the device complexity increases
Solution Approach 1:
The shield body serves multiple functions simultaneously: it protects the laser module from direct obstacle contact, guides the moving seat's motion, and works with the elastic element to provide both protection and reset functionality. The moving seat structure integrates the shield body, moving part, and linkage mechanism into a unified assembly that performs protection, motion control, and sensing transmission functions, reducing overall system complexity despite adding protection capabilities.
Solution Approach 2:
The patent incorporates an elastic element that acts as a cushioning mechanism between the moving part and the blocking part. This elastic element absorbs impact forces before they reach critical components, providing beforehand cushioning that protects the laser module and reduces the need for more complex protection mechanisms. The elastic element compresses during impact and naturally rebounds, providing continuous protection without requiring active control systems.
3Measurement precision
If the moving part moves toward the blocking part to sense collision, then the collision detection is improved, but the elastic element must withstand repeated compression
Solution Approach 1:
The elastic element serves itself by automatically resetting after each compression cycle. When the moving part compresses the elastic element against the blocking part, the elastic element stores potential energy and then naturally rebounds to its original position, ready for the next detection cycle. This self-service mechanism eliminates the need for external reset systems and maintains detection readiness without additional energy input or mechanical intervention.
Solution Approach 2:
The elastic element is specifically designed to withstand repeated compression through its material properties and geometric design. The elastic element acts as a shock absorber that distributes impact forces over time, reducing peak stresses on individual components. By positioning the elastic element between the moving part and the rigid blocking part, the system provides beforehand cushioning that protects the elastic element from excessive forces while maintaining sensitive collision detection capability.
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
Enables the robot to determine collisions and transmit information to avoid being stuck, allowing it to move out of the collision situation effectively by using the collision sensing device to drive the moving seat and linkage body to interact with the sensing element.
Implementation Method 1
at least one elastic element sandwiched between the moving part and the blocking part, the elastic element being compressed by the moving part to have a resilient force when the moving part moves toward the position of the blocking part
Data Source
AI summary
A collision sensing device for laser module accommodates a laser module by a shield body, a moving seat and a base, and a scanning space is set between the shield body and the moving seat to provide a scanning environment for laser module. When a shield body is collided, the shield body may drive the moving seat to move backward, and a traction part disposed at a periphery of the moving seat drives one end of a linkage body to move backward. Therefore, when the linkage body moves backward, it touches or presses a sensing part of a sensing element, the sensing element may determine whether the shield body is collided; if it is determined that the cover shield body is collided, a collision information may be transmitted to a control unit to drive a robot to move out of trouble.