1. Receiving light

The measurement principle of the laser triangulation is based on a simple geometric relationship, and the laser beam from the laser diode is irradiated on the surface of the measured object. The light reflected by the laser ranging sensor is projected onto a matrix of light-receiving elements through a set of lenses, and the light-receiving elements can be CCD/CMOS or PSD elements. The intensity of the reflected light depends on the surface properties of the object being measured. For this reason, the sensitivity of the analog element PSD needs to be adjusted, while for the digital element CCD sensor, the real-time surface fill light technology can instantaneously change the received light intensity by using the laser ranging sensor.

2. Analysis and interpretation

The distance from the small-range laser ranging sensor to the object to be measured can be accurately obtained by trigonometry, and this method can obtain micron-level resolution. Depending on the model, the measured data is evaluated by an external or built-in controller through various interfaces. The point laser sensor is projected onto the object to be measured to form a visible light spot, through which the probe can be easily installed and debugged. Therefore, the laser ranging sensor has been used in many fields and has become a popular choice for precision distance measurement. Depending on the design, optical measurement allows wider measurement distances. Depending on the needs of the measurement task, very small ranges can be selected, but with extremely high measurement accuracy. Or choose a long-range laser ranging sensor, but the measurement accuracy will decrease.

The visible light and other parts are decomposed during the working process of the laser ranging sensor. Its greater feature is that the influence of the environment on its monitoring is greatly weakened. The traditional displacement sensing device will have different performances in different media. , At the same time, there are many requirements for the measured organism, but the use of laser ranging sensors can solve many problems without worrying too much about problems during the measurement process.