自動化視覺檢測系統技術是如何實現精準檢測的？
發布時間：
2023-02-10 11:28
機械設備的研發與應用是為了彌補人工的不足，視覺檢測系統能夠順利的完成對微小尺寸的精確快速測量、形狀匹配以及顏色辨識等，這些都是人工無法完成的任務。機器視覺檢測技術就是把CCD照相機抓取圖像后送入計算機或專用的圖像處理模塊，通過數字化處理，根據像素分布和亮度、顏色等信息來進行尺寸、形狀、顏色等的判別。
The development and application of mechanical equipment is to make up for the lack of manual work. The visual inspection system can successfully complete the accurate and rapid measurement of micro size, shape matching and color identification, which are tasks that cannot be completed by human. Machine vision detection technology is to capture the image by CCD camera and send it to the computer or special image processing module. Through digital processing, the size, shape and color can be judged according to the pixel distribution, brightness, color and other information.
視覺檢測系統在檢測方面有哪些優勢呢？
What are the advantages of visual inspection system in detection?
1、大型工件平行度、垂直度測量采用激光掃描與CCD探測系統的大型工件平行度、垂直度測量儀，它是以穩定的準直激光束為測量基線，配以回轉軸系，旋轉五角標棱鏡掃出互相平行或垂直的基準平面，并將其與被測大型工件的各面進行比較。在加工或安裝大型工件時，可用該認錯器測量面間平行度及垂直度。
The parallelism and perpendicularity of large-scale workpiece is measured by laser scanning and CCD detection system. It takes the stable collimating laser beam as the measuring baseline, and rotates the pentagonal prism to sweep out the parallel or vertical datum plane, and compares it with each face of the measured large workpiece. When machining or installing large workpieces, it can be used to measure the parallelism and perpendicularity between surfaces.
2、熱軋螺紋鋼幾何參數在線動態檢測系統，該系統以頻閃光作為照明光源，利用面陣和線陣CCD作為螺紋鋼外形輪廓尺寸的探測器件，實現熱軋螺紋鋼幾何參數在線測量的動態檢測。
In this system, the flash is used as the illumination light source, and the area array and linear array CCD are used as the detection devices of the outline dimension of the hot-rolled deformed steel bar.
3、軸承狀態實時監控，采用視覺檢測技術實時監控軸承的負載和溫度變化，消除過載和過熱的危險。該技術將傳統的通過測量滾珠表面來保證加工質量和安全操作的被動式測量變為主動監控。
The real-time monitoring of bearing condition adopts visual inspection technology to monitor the load and temperature changes of bearing in real time, so as to eliminate the danger of overload and overheating. This technology changes the traditional passive measurement to ensure the machining quality and safe operation by measuring the ball surface into active monitoring.
4、基于機器視覺的儀表板總成智能集成測試系統，汽車儀表板總成上安裝有速度里程表、水溫表、汽油表、電流表、信號報警燈等，其生產批量大，出廠前需要進行一次質量終檢。檢測項目包括速度表等五個儀表指針的指示誤差，24個信號報警燈和若干照明燈是否損壞或漏裝等。機器視覺檢測系統技術的智能集成測試系統改變了這種現狀，實現了對儀表板總成智能化、全自動、快速度的質量檢測，克服了人工檢測所造成的各種誤差，大大提高了檢測的效率和可靠性。
The intelligent integrated test system of instrument panel assembly based on machine vision is equipped with speed odometer, water temperature meter, gasoline meter, ammeter, signal alarm lamp, etc. on the automobile instrument panel assembly, its production batch is large, and a final quality inspection is required before leaving the factory. The detection items include the indication error of five instruments such as speedometer, whether 24 signal warning lights and some lights are damaged or missing. The intelligent integrated test system of machine vision inspection system technology has changed this situation, realized the intelligent, automatic and fast quality inspection of instrument panel assembly, overcame various errors caused by manual inspection, and greatly improved the efficiency and reliability of detection.
5、金屬板表面自動探傷系統，在對表面質量要求很高的特殊大型金屬板進行檢測時，原始的檢測方法是采用人工目視或用百分表加探針進行檢測，該方法不僅易受主觀因素的影響，而且可能給被測表面帶來新的劃傷。金屬板表面自動探傷系統利用機器視覺檢測系統技術對金屬表面缺陷進行自動檢查，可在生產過程中高速、準確地進行檢測，同時由于該系統采用非接觸式測量，避免了產生新劃傷的可能。
The automatic flaw detection system for metal plate surface, when testing special large metal plate with high surface quality requirements, the original detection method is manual visual inspection or dial indicator plus probe. This method is not only easily affected by subjective factors, but also may bring new scratches to the tested surface. The automatic flaw detection system of metal plate surface uses machine vision inspection system technology to automatically inspect metal surface defects. It can detect metal surface defects at high speed and accurately in the production process. At the same time, because the system adopts non-contact measurement, the possibility of new scratch is avoided.
6、汽車車身輪廓尺寸精度檢測系統，每個激光器、攝像機單元均在離線狀態下經過校準，同時還有一個在離線狀態下用三坐標測量機校準過的校準裝置用以對攝像機進行在線校準；檢測系統以每40秒檢測一個車身的速度，可檢測三種類型的車身；系統將檢測結果與從CAD模型中提取出來的合格尺寸相比較，測量精度為±0.1mm。
In this system, each laser and camera unit is calibrated offline. At the same time, there is a calibration device calibrated by CMM in offline state to calibrate the camera online. The detection system can detect three types of car bodies at the speed of detecting one body every 40 seconds. The system can test three types of car bodies Compared with the qualified dimension extracted from CAD model, the measurement accuracy is ± 0.1 mm.
7、車身表面質量檢測系統，該檢測系統綜合采用了投影光柵直接相位采集、高速數字圖象處理、表面缺陷圖象模式自動識別、智能化質量判斷、自適應系統學習技術、松散化自調節軟硬件結構以及機器人系統控制技術，可以在傳動速度為5m/min的生產線上，對焊裝完畢的白車身進行的在線檢測。
The inspection system for the surface quality of car body is composed of direct phase acquisition of projection grating, high-speed digital image processing, automatic recognition of surface defect image pattern, intelligent quality judgment, adaptive system learning technology, loose self-adjusting software and hardware structure and robot system control technology. The system can complete welding on the production line with transmission speed of 5m / min On line inspection of BIW.
毋庸置疑，視覺檢測系統技術在提高自動化生產水平和檢測的智能化水平方面有了非常大的進步，將來，自動化視覺檢測系統技術的發展空間也會大有可為。
There is no doubt that the technology of visual inspection system has made great progress in improving the level of automatic production and intelligent detection. In the future, the development space of automatic visual inspection system technology will also be promising.
視覺檢測系統