CN
EN
Plan
The electronic control system of the straight arm high-altitude work platform is designed specifically for fully self-propelled arm models and can be compatible with various engine power schemes such as diesel power, electric power, and hybrid power. The system integrates multiple safety control logics such as vehicle tilt protection, overload protection, action limit protection, torque limit protection, anti compression, and anti rollover, ensuring the safe and reliable operation of the entire machine in all aspects.
Scheme Functions
1 Functional safety design
The high-altitude work platform industry is developing rapidly, and the market share continues to grow. The intrinsic safety requirements of equipment are also constantly increasing. The increasingly strict domestic and international standards such as ANSI 92.5 in the United States, EN280 in Europe, and GB25849 in China, coupled with strong export demand, have made functional safety design an essential requirement in the industry. We have the ability to independently design functional safety systems and core components, and can quickly customize and adapt functional safety solutions for OEM customers, and achieve hierarchical decoupling control. Simultaneously possessing the ability to develop security controller hardware and system software, assisting the host factory control team in quickly building and upgrading their capabilities.
2 Security protection
amplitude limit protection - intelligent automatic switching of multi load operation curves. In order to avoid limiting the overall movement of the vehicle and affecting the convenience of operation after triggering the over amplitude protection, we have designed a pre safety control function: when the operating state approaches the pre over amplitude curve, the system only restricts the dangerous direction movement. While strictly implementing safety restrictions, it ensures the continuity and flexibility of equipment operation to a greater extent. Platform overload protection - the platform weighing sensor is prone to the problem of false overload signals caused by impact interference during the start stop and movement of the boom. The system adopts filtering and hysteresis processing algorithms to effectively avoid false alarms. At the same time, equip the single point weighing sensor with a one click multi-point calibration mode inside/outside the factory, significantly improving weighing accuracy and calibration efficiency.
Torque limit protection - The control system of high-altitude work platforms usually only has amplitude limit and platform load limit functions. In practical operations, if there are violations that evade platform weighing protection, the entire machine may still be at risk of tipping over. Torque limit protection can be constrained from the perspective of overall safety, effectively avoiding such dangers and preventing equipment from tipping over.
3 Operability
Smooth operation, gentle start stop without impact, precise and sensitive micro motion, and fast speed response. The electronic control system can fully adapt to various hydraulic systems and core component combinations such as pumps and valves from mainstream manufacturers such as Danvers, Rexroth, Hengli, and Sant. By relying on position closed-loop, speed closed-loop, and intelligent control algorithms, fast matching and debugging can be achieved, and the standardization and standardization of electronic control system hardware can be promoted in collaboration with the host factory, facilitating internal management and market services. In terms of hardware, the controller's computing power has increased by more than 5 times compared to traditional solutions, effectively eliminating step response errors, running shocks, and lagging phenomena caused by program scanning cycles, greatly improving the overall handling quality of the machine. At the software level, an intelligent electro-hydraulic collaborative control algorithm based on model-based design is adopted, which can achieve rapid parameter tuning and precise target tracking, significantly shorten the debugging cycle, improve production efficiency, and bring excellent control experience of smooth, gentle start stop, precise micro motion, and quick response.
4 The self-propelled high-altitude work vehicle belongs to manned operation equipment and has very high safety performance requirements for data recording
. Real time recording of the entire process data of vehicle operations can provide strong support for the R&D team to optimize product design, quality team to reproduce and analyze faults, and also provide important basis for defining and tracing safety accident responsibilities. The system relies on the built-in storage module of the turntable display to achieve comprehensive data recording, covering key parameters such as date and time, arm length, angle, amplitude, actual load, rated load, fault information, port status, engine working hours, speed, fuel quantity, boom and driving action, port output PWM and feedback current, platform horizontal angle, chassis horizontal angle, turntable rotation angle, etc.