The radar, infrared sensor, photocell and vehicle detection solutions work differences; technical guide, which explains the correct positioning and adjustment principles.
- Main topic
- Automatic door sensor
- Search intent
- News
- Guide type
- Technical decision support
The task of automatic door sensor
Automatic door sensor, the upcoming person or vehicle detect and sends the signal to the control board. Sensor is not the motor of the door; it is the input element that produces the right command at the right time. For safe closing of the door, also need safety equipment.
The choice of sensors on the industrial field can not be made according to the detection distance alone. The forklift speed affects the sensor performance of environmental conditions such as pedestrian density, mutual doors, metal surfaces, rain and vibration.
Radar, infrared and other sensors
Radar sensors evaluate movement and approach information with the microwave principle; can offer wide detection area on fast vehicle traffic. Active infrared sensors can create more controlled zones by following reflection in a specific area.
safety photocell detects downtime on the closing line. inductive loop detector inductive in the ground operating cycle chooses metal tool over. These equipment do not do the same job; opening command and security functions should be defined separately in the project.
Detecting area setting
If the sensor sees a lot of exhausts, the intrigued movements passing through the corridor can open the door. If the area is kept very narrow, it can not be enough opening time for the fast-incoming forklift. Angle, height, precision and waiting time should be tested with real traffic.
In two gates with mutually, sensors should be avoided triggering each other or neighboring movement space. The distance of the door to the opening speed is set together; default values in the sensor menu are not used.
Wrong opening and fault symptoms
Continuous opening; moving machine, vibrating flexible curtain can be welded from rain, reflection or faulty sensitivity. The sensor angle may be associated with the wrong configuration of the dirty surface, cable connection or control input.
Safety circuits should not be bridged when searching for failure. Energy, connection, indicator codes and manufacturer settings are controlled by authorized technical personnel; field test should be done with different speed and loads after change.
Checklist for accurate sensor selection
Is the vehicle or pedestrian, the traffic is one-way, the door is inside, what is the approach speed and the unwanted motion resources should be answered. If you need access control, sensor can be built with card switch or remote control.
Electrical compatibility with the IP protection of the sensor, temperature range, mounting height and control board should be verified from technical documents. The final decision is cut by the commissioning test on the door and field.
Sensor commissioning and verification approach
Sensor setting is not completed with a single trial made when the door is closed. Slow and fast approach, parallel to the door, pedestrian movement and vehicles with different heights are corrected by the limits of the detection area.
If the delay is kept long than the delay of the closing, the energy loss and unnecessary exposure is increased. Very short delay can withdraw the closing command early on the vehicles coming back. Control parameters must be adjusted according to measured traffic range.
Light rainfall, daylight, vibration and temperature change in external ambient sensors are included in the test plan. Moving fan in front of the door, chain, flexible curtain or the detection geometry is reorganized if items like plant are incorrect trigger source, rather than reduce the sensitivity alone.
Sensor model in maintenance records facilitates the return after failure to hold the mounting height, angle, precision and delay values. The reason for change should be recorded when parameter changes are done.
- Traffic type to be taken
- Mounting height and viewing area
- Speed with the direction of burning
- Mistake resources
- control panel and safety compliance
Final assessment and technical quotation
The right decision for Automatic door sensor is based on evaluating measurable site data together, rather than focusing on a single catalogue value. Options can be compared technically when the clear opening, peak-hour traffic, environmental conditions, safety functions and automation requirements are recorded in the same project brief.
This guide provides a preliminary assessment. The final product, capacity and accessory selection should be confirmed after a site survey and risk assessment. A quotation that clearly defines the door assembly, drive, sensors, safety equipment, supporting structure, installation, commissioning and maintenance scope enables a more reliable comparison of total cost of ownership.
Frequently Asked Questions
Automatic door sensor How does it work?
It converts detected movement or presence into an electrical signal and sends an opening or safety command to the door control panel.
Why does the sensor turn the door continuously?
Excess precision, wrong angle, vibration, moving equipment, rain or neighboring traffic area can cause it.
Is photocell same with radar?
No. The radar detects approach to mostly open triggers; is the security element that controls the barrier in the photocell closing area.