Laser on-line detection technology is more and more widely used in the domestic car industry. Laser on-line detection technology can realize real-time monitoring of product quality, and timely measures are taken to find quality problems, which can effectively control the stability of white body welding assembly product quality.
With the intensification of market competition and the increasing demand for performance of all aspects of automobiles, there has been a leap in development from product development to automobile manufacturing technology. The following is a brief introduction to the application of laser on-line detection technology in the manufacture of body-in-white, hoping to exchange learning with colleagues.
<br> <br> laser line detection technique is the use of laser of laser vision inspection, visual (CCD) sensor, and a computer image processing technology to achieve control of the spatial dimensions of the object and the position precision measurement technology, non-contact, fast, 100 The characteristics of the % inspection and monitoring can well control the stability of the quality of the body-in-white welding assembly.
Laser on-line detection is divided into two types: mobile and fixed: the mobile type is to install the laser vision sensor on the robot arm for detection; the fixed type is to mount the laser vision sensor in different positions of the fixed frame to detect the white body welding assembly. Laser on-line inspection systems include laser on-line inspection of steel frame or robots, laser vision sensors, computer and processing systems, measurement control software, data management and analysis software.
The fixed laser on-line detection device consists of multiple laser vision sensors, each sensor corresponding to a measured point. The number of sensors is determined by the specific measurement requirements of the product parts. All sensors are fixedly mounted on a basic frame and passed through the field control bus. And the video bus is connected to the host computer to form a complete detection device. The multi-sensor fixed laser visual inspection device is equivalent to a three-coordinate measuring machine with multiple probes working at the same time, and the measurement time is short and the precision is high.
The laser vision sensor is an element that acquires image information of the object to be measured. The LVP01/D is a probe that uses a semiconductor laser as a light source. It can measure the spatial three-dimensional coordinates or functional dimensions of the edges on the body of the body in a non-contact, on-line manner. The resolution is 0.01mm, the measuring time is 0.5s, and the measuring working distance is 300~1500mm.
Mobile robot laser online detection equipment, a robot arm with a laser vision sensor, through the robot movement to achieve measurement of each detection point. Compared with the fixed type, the laser vision sensor is used less, that is, each robot and one sensor constitute a measuring part. The measurement time is long, and it is necessary to consider whether the production cycle is required during the process design. Due to the robot movement error, the measurement accuracy is lower than that of the fixed laser on-line detection device.
The laser on-line detection system measurement data can be displayed visually in graphs and curves. If the out-of-tolerance system outputs an alarm signal, the measurement results can be accessed through the LAN to the shop information system. The technical, quality assurance and other related departments can access it at any time in their respective office terminals. Analyze measurement data.
The functions of the measurement control software can be realized through a graphical interface. The technical features are mainly reflected in: automatic measurement, real-time display of measurement status, real-time communication, and system fault diagnosis. The data management and analysis software is responsible for the management of measurement data and the completion of the query and analysis of data by LAN users.
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