Company News

• JRT meets you at China International Hardware Show

  2019 / 10 / 10

  China International Hardware Show has been hailed as [the largest tool hardware exhibition in the world", and has gathered thousands of companies from all over the world. Through the exhibition, we can strengthen cooperation with exhibitors from all walks of life in the world, introduce new audience organization channels and means, and increase the organization and promotion of international emerging market audiences while maintaining the advantages of traditional European and American procurement channels. At the same time, strengthen domestic industrial fields and second and third tier cities. The market development efforts to maintain professional and domestic tool buyers and distributors continue to grow. JRT is exhibiting at this exhibition and welcomes your cooperation and exchange. Welcome to China international hardware show in Shanghai, Our booth number: 8.2K115.

• What are the specific applications of lidar in driverless driving?

  2019 / 09 / 29

  1. Positioning Positioning in unmanned driving for ten minutes is important. Only with real-time location information can the system make the next interpretation, decide where to go, and how to get there. There are many ways to position it now. Such as carrier phase difference technology (RTK), but RTK is still subject to signal interference. Especially in some cities, buildings and trees, as well as tunnels and tunnels, its signal is easily interrupted. At the same time, sensors such as cameras are also used to sense the external environment, construct an environmental model, and use the model to determine the location of the vehicle, but its dependence on the environment is relatively strong, such as backlighting or rain and snow, such positioning is prone to failure. Lidar relies on comparing the initial position of the vehicle with the high-precision map information to obtain a precise position. First, sensors such as GPS, IMU, and wheel speed give an initial (probably) position. Secondly, the local point cloud information of the lidar is extracted, and the vector features in the global coordinate system are obtained by combining the initial positions. Finally, the vector features of the previous step are matched with the feature information of the high-precision map to obtain accurate global positioning. Therefore, in terms of positioning, the use of laser radar has an unparalleled advantage in terms of accuracy and stability. 2. Detection and classification of obstacles Lidar does not rely on illumination, its viewing angle is 360 degrees, the calculation is relatively small, and it can be scanned in real time. It is generally used within 100 milliseconds. In the process of scanning, the laser radar first identifies obstacles, knows the position of the obstacle in space, and then classifies according to the existing obstacles. For example, cars and people, we divide th

• What is a serial interface?

  2019 / 09 / 26

  Serial Interface refers to the sequential transmission of data one by one. Its characteristic is that the communication line is simple, so long as a pair of transmission lines can realize two-way communication (telephone lines can be used directly as transmission lines), thus greatly reducing the cost, especially for long-distance communication, but the transmission speed is slow. The data of a message is transmitted bit by bit in sequence, which is called serial communication. The characteristics of serial communication are: data bits are transmitted in bitwise order, which can be completed by at least one transmission line; low cost but slow transmission speed. Serial communication can range from several meters to several kilometers. According to the direction of information transmission, serial communication can be further divided into three types: single, half-duplex and full-duplex. Serial interfaces are divided into RS-232-C, RS-422, RS485 and so on according to electrical standards and protocols.