In the automotive electronic control system, the sensor is responsible for the collection and transmission function, it is a very important part of the electronic control, and its technical performance is good or bad, directly affecting the work of the automotive electronic control system. As a kind of light or changes in light, converted to electronic signals, sensors, photoelectric sensors in the car is also more common, take a look.
The application of photoelectric sensors in automobiles: photoelectric sensors are used for parking and garage detection.
The principle structure of photoelectric sensors and the advantages of photoelectric sensors
Photoelectric sensors are sensors that use a photoelectric element as the detection element, usually consisting of three parts: the light source, the optical path and the photoelectric element. The photoelectric detection method has the advantages of high precision, fast response, non-contact, and many measurable parameters.
The working principle of photoelectric sensor is: firstly, the measured change is converted into the change of light signal, and then transformed into electric signal through photoelectric conversion element, and its working basis is photoelectric effect. Photoelectric components are photoresistors, photodiodes, phototransistors, light-emitting diodes LEDs, photomultiplier tubes, photocells, photocoupling devices and so on.
Photoelectric sensors in automotive applications
Simply put, the application of photoelectric sensors in automobiles mainly includes the following scenarios:
1. Photoelectric sensor applications in active suspension systems
Can according to the body height, speed, steering angle and rate, braking and other signals, by the electronic control unit ECU control suspension actuators, so that the suspension stiffness, damper damping force and body height and other parameters to change, so that the car has a good ride comfort and operational stability. In the active suspension system, the vehicle height and steering sensor are two important components, and these two component types are mostly photoelectric sensors.
2. Application in parking and garage detection
The control system is the soul of the stereo garage, and the sensor is the basis of the control system. Because it is a long-distance detection, so the stereo garage is mainly used in photoelectric sensors, reflective and reflective photoelectric sensors are mainly used.
The use of the counter-reflective photoelectric sensors in the bottom of the scanning detection, can be used to detect the carrier plate on the car whether the car is parked in place. Photoelectric sensor receiver and transmitter. Installed on the left and right sides of the bottom floor, respectively, in the front and rear position of the carrier plate are detected; in each carrier plate on a diagonal line placed a set of photoelectric sensor switches can be used to detect the carrier plate with or without a car.
In addition, the photoelectric sensors can also detect whether the panning movement of the carrier plate is in place, whether the carrier plate lifting is in place, and so on. It can be said that with more and more intelligent driving and different environments in the automotive application needs, photoelectric sensors have a very diverse detection role. In the future, photoelectric sensors in automotive applications still need to be further expanded and deepened.