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In many occasions with high reliability and high security requirements, redundant design is an essential solution.
The most common thing is to design redundant devices on military equipment . When the main equipment is out of control and damaged,start the backup system (redundant system) immediately is the most common method of redundant design.
Applied to the electric control joystick , the core component of the electric control handle is the position (angle) sensor. Once the sensor fails, the entire handle will fail, which may cause safety hazards. Therefore, the electronic control handle of Chen Gong Technology can provide two completely independent position sensor (potentiometer or Hall) outputs.
As for the application system, how to make good use of the two output signals of the electric control handle? According to the application experience of manufacture application systems. Read two signals (controller or single-chip microcomputer) at the same time and then compare them. If the handle and the sensor are working as usual, the two signals must be output in a certain ratio.
The two-channel signal of the electronic control handle of Shanghai Chengong Electrical Control Technology Co,Ltd. is generally set as a cross-output voltage signal. For example,the median voltage Va=2.5V, Vb=2.5V of the electric control handle output by the redundant Hall; Va=2.5-4.5V, Vb=2.5-0.5V when the handle is pushed forward; When pulling, Va=2.5V-0.5V, Vb=2.5-4.5V. (As shown in the figure). If it is designed in this way, as long as the electronic control system controller reads in the range of Va+Vb=5.0+-0.2V, it will think that the electric control handle and equipment are working in a normal state, and if it exceeds this range, the alarm handle will go wrong. It can be seen that this design can greatly improve the security of the system, but it is not the mode that we usually understand that the A road is broken and the B road is switched to work.
The purpose of our design redundancy is to improve the safety of the equipment, not to switch to the backup system when the equipment is not working. This is the basic idea for the design of the dual-redundancy system of the electronic control handle. I hope it can inspire you, thank you!
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