Q&A

Which laser level does the JRT laser ranging sensor belong to? 

The U81/M88/BA6A series fall under the visible security laser level 2, while the PFT-400 series belong to the non-visible safe laser level 1. 

2. Classification of laser sensors? 

Phase-based: In phase-based ranging, the emitted light beam is continuously modulated. When the continuously modulated beam reaches the object to be measured, it will be reflected back. By comparing the phase changes generated in the received beam, the distance can be measured. 

Pulse type: The distance of the target is determined by the difference in the propagation time of the emitted pulse signal and the received target reflection signal. A video pulse-modulated carrier with a period of T is transmitted towards the spatial target. The target echo is received by the ground receiver and the time delay between the transmission and reception pulses is measured. Thus, the distance of the target can be calculated as 'a'. 

TOF style: The TOF ranging method belongs to the two-way ranging technology. It mainly uses the flight time of the signal traveling back and forth between two asynchronous transceivers to measure the distance between nodes. The TOF ranging technology is a method of flight time difference ranging. 

3. What is the difference between laser ranging and infrared ranging? 

Infrared sensor: Infrared is also known as infrared light, which is invisible. When an infrared sensor measures, it does not come into contact with the object being measured. Its accuracy is slightly lower than that of laser ranging, but it has poor anti-interference ability. It needs to filter the infrared light through a lens before measurement, and regular calibration is required. It has a strong thermal effect. 

Laser ranging sensor: Non-contact direct distance measurement, fast speed, high accuracy, wide range, strong resistance to light and electrical interference. The technology is mature in China. 

4. What types of upper computers can communicate with the JRT laser distance sensor? 

Single-chip microcontrollers, MCUs, Raspberry Pi, Arduino, industrial control computers, etc. that can communicate with serial module can also communicate with JRT ranging module. 

5. Will reversing the power line of the module cause it to be damaged? 

Yes, reversing the connection will damage the laser module chip. Therefore, make sure to connect the wires correctly. If you are unsure about how to do it, please contact our sales representative for confirmation.