DATE: 2024/11/21
Give Robots a 'Safety' Boost
Safety factors are key to ensuring the successful application of robots.
SEER Robotics, with an ultimate pursuit of product quality, strictly controls various aspects such as functional safety, mechanical safety, electrical safety, and software safety to build a solid defense line for safety. This ensures that every stage of the product lifecycle meets high standards of safety requirements, aiding in the efficient and sustainable development of customers.
Functional Safety
In terms of functional safety, SEER Robotics is committed to identifying and reducing potential sources of risk, ensuring that robots can maintain a safe state even in the event of system failures or operational errors.
During the certification process of SEER Robotics' self-developed safety controller, the SRC-3000FS, it received training, guidance, and assessment from the globally renowned third-party testing and certification organization, SGS. By learning the latest international standards and cultivating safety concepts, safety methods and measures were integrated into the product during the design phase. Through rigorous validation testing, SEER Robotics ensures that all safety-related components can reliably perform their intended functions, creating a high-quality controller with built-in functional safety.
Emergency Stop Function
The most basic of all safety functions, it consists of two parts: emergency stop input and emergency stop output. It features a dual-channel emergency stop input/output function with diagnostic capabilities, requiring an external double-knife emergency stop button, and the driver needs to support the STO (Safe Torque Off) function.
Safety Speed Monitoring Function
The monitoring of the movement speed of differential dual-wheel robots and single-steering wheel robots is achieved through one or two safety encoders, including both travel speed and rotation speed. When the speed exceeds the threshold, it controls the drive and motor to stop urgently.
Safety Steering Detection Function
For single-steering wheel robots, the robot's steering is related to the direction of the rudder angle. The direction of the robot's left or right turn is determined by detecting the rudder angle through safety proximity switches.
Safety Obstacle Avoidance Function
The SRC-3000FS detects the robot's movement speed and steering information through safety encoders and safety proximity switches, and then controls the safety laser to switch the safety protection area through a safety DO (Digital Output). When an obstacle is detected in the safety zone, it controls the driver and motor to stop urgently.
Safety Limit Function
Safety proximity switches are used to detect whether a linear motion mechanism has moved into place or encountered a collision, and to control the drive and motor to stop once the position is reached.
Safety Feature:
Refers to specific features or components designed to provide protection and prevent the occurrence of dangerous accidents. In industrial settings, safety features may include emergency stop buttons, explosion-proof valves, mechanical barriers, and more. These functions are part of a system used to directly intervene in safety-related matters to protect personnel, equipment, and the environment.
Functional Safety
Refers to a set of attributes related to the safe execution of necessary functions by electronic systems, especially the ability to maintain these functions in the event of a failure. It covers the entire lifecycle of a system, including design, implementation, operation, and maintenance, ensuring that the system or equipment cannot cause unacceptable risks under normal or abnormal operating conditions. Functional safety is typically achieved through a series of engineering measures and management processes, and it is a quantifiable methodology. Well-known related international standards include IEC 61508 and ISO 26262 (which pertains to functional safety in the automotive industry).
In simple terms, a safety function is a specific inherent characteristic or component of a system that is implemented to achieve safety objectives, while functional safety refers to the entire set of processes and attributes that ensure safety functions are executed correctly in a manner designed to reduce risks to an acceptable level. Together, they enhance the overall safety performance of a system.
Mechanical Safety
Mechanical safety is the first line of defense against physical injuries. In terms of mechanical safety, there is a potential for collisions and crushing due to design flaws or equipment component failures, which can cause personal and property damage. This issue is particularly prominent for heavy-load robots.
To ensure product mechanical safety, SEER Robotics not only conducts comprehensive safety plan demonstrations in the early stages, takes adequate safety measures, and obtains relevant certifications, but also carries out strict mechanical strength tests and aging tests. These tests verify the stability and durability of the product under long-term use, ensuring the safe and stable operation of the product under conditions such as high and low temperatures, high vibration, high humidity, and high electromagnetic radiation.
Taking SEER Robotics' standard intelligent forklifts as an example, the entire vehicle has passed the CE-MD certification, ensuring that it meets the highest European Union standards in terms of mechanical safety. This includes not only the stability and strength of the mechanical structure but also the effectiveness of various safety devices, such as navigation lasers, front and rear obstacle avoidance lasers, safety edges, distance sensors, emergency stop buttons, and 3D obstacle avoidance cameras.
Electrical Safety
In terms of electrical safety, in addition to the mechanical safety issues that can arise from design flaws or low reliability in robots themselves, there are also concerns related to the safety of lithium batteries and electrical usage, as well as the safety of battery transportation.
A Battery Management System (BMS) can effectively improve battery utilization by monitoring the real-time working status of the battery, preventing overcharging and over-discharging, ensuring the safe and efficient operation of the battery pack, and extending the battery life. The main functions of the BMS include:
-Battery Status Monitoring: Real-time monitoring of the voltage and temperature of each battery cell, as well as the total voltage and total current of the entire battery pack.
-Battery Balancing: During the charging and discharging process, adjust the energy distribution among battery cells to ensure that all cells are as close as possible to the same state of charge and discharge.
-Thermal Management: Regulate the temperature of the battery pack through heat dissipation or heating devices to ensure it operates within the optimal temperature range.
-Safety Protection: Implement various protective mechanisms, such as overvoltage protection, undervoltage protection, overcurrent protection, short circuit protection, etc., and take immediate evasive actions and issue alerts upon detecting any abnormal conditions.
-SOC/SOH Estimation: Accurately estimate the parameters of SOC (State of Charge) and SOH (State of Health) to provide users with reliable information on battery Endurance Information
-Communication Interface: Provides a communication interface with external devices (such as chargers, robot controllers, etc.), allowing for data exchange and remote monitoring.
SEER Robotics' modular batteries have obtained multiple internationally recognized battery safety certifications, including CB, UL, and CE certifications, ensuring that the product meets strict electrical safety standards in different markets and application environments.
SEE Robotics' modular batteries have not only demonstrated excellence in electrical safety but also received comprehensive validation in the area of transportation safety. They have passed the UN38.3 certification, which is specifically established by the United Nations for the transportation of dangerous goods, as well as air and sea transport appraisal tests. This includes a series of professional tests such as high-altitude simulation, temperature testing, vibration, shock, external short circuit, impact/crushing, overcharging, and forced discharge, ensuring the safety of battery transportation。
Software Safety
SEER Robotics' digital software provides multiple layers of protection for on-site robot safety.
The M4 Intelligent Logistics Management System continuously optimizes and enhances its usability and stability, especially in terms of fault recovery. The business processes can smoothly recover from failures and downtimes of mobile robots, equipment, and third-party systems, ensuring business continuity and retryability.
The Unified Resource Dispatching System (RDS) supports task visualization, allowing users to observe the execution status and progress of all tasks in real-time from the task management interface. It enables the immediate detection of various faults and exceptions and provides a clear review of problem details.
The visualization series of products recreate the real factory environment in 2D and 3D formats, allowing users to more intuitively monitor the entire process status of robots in real-time. When abnormal conditions occur, the system can immediately issue warnings and provide corresponding solutions, helping users quickly pinpoint and resolve issues, ensuring a smooth and efficient production process.