Revolving door, photoelectric sensor and security contact sensor which is more practical?
At present, due to the automatic revolving door mainly includes photoelectric sensor and sensor device and safety contact with two kinds of sensor. To this, some users will ask, revolving door of this two kinds of sensors, which one will be more useful?
A, the response speed
Revolving door photoelectric sensor is slower than the security contact sensor response speed. Specifically is namely photoelectric sensor with signal judgment box need 40 ms, reaction time, reaction link again to the control system. , contact with the sensor signal is required to make judgment box, can be directly to transmit signals to control systems, so don't need the reaction time, so we need to set normally open signal, contact stop door, disconnect is rotating, convenient and simple.
Second, the principle of induction
In terms of its working principle, adopted by the revolving doors under normal working state photoelectric sensor, photoelectric sensor is set to transmit and receive signals, when strip squeezed light is blocked, after a judge box to judge, will be a signal to the control system, in order to ensure the normal door opens, and ensure traffic safety. And the principle of safety contact zone is in when strip squeezed, after connecting a safety contact zone, automatic revolving door stop immediately, just like the light bulb, immediately light turning on the power supply, or destroyed. And, for security contact sensor, you can also add self-checking system, in order to keep track of whether it is in normal state, and photoelectric was relatively complicated.
All in all, according to the above comparison, in terms of its practicability and reliability, the majority of users can choose the contact belt, and the application of the sensor is more mature.