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As automation becomes the driving force behind factory transformation, more and more automated instruments are being developed to support high-speed automated production. Straightness measuring devices enable online, automated detection of straightness and outer diameter dimensions, allowing workers to monitor the production status in real time so that they can adjust the rolling mills promptly and achieve high-quality production. Straightness measuring instrument: http://www.bdlanpeng.com/repository/image/fkah51NKTpm1lJZYf*Lhw.jpg?k=1561028603000. When measuring the straightness of the outer contours of wires, rods, or tubes, three devices based on the above principle are used simultaneously. These three devices measure the position data of the workpiece at the same time; by connecting the position data collected by the two devices on the left and right sides, the theoretical position of the middle device when the straightness is 0 is calculated. This theoretical position is then compared with the position data obtained by the middle device, and the difference represents the straightness deviation of the workpiece at its current position. Performance features of the straightness measuring instrument: 1. High measurement accuracy. The straightness measuring instrument uses high-precision high-frequency CCD chips, with a pixel resolution of 4.7 μm. Combined with an optical system that is more precise than that of the object image, the straightness measuring instrument provides accurate measurements, with a dynamic measurement error of no more than 0.03 millimeters. 2. High measurement frequency: The straightness measuring instrument utilizes a digital acquisition circuit that makes full use of the high-frequency scanning capabilities of linear CCD chips, allowing a measurement frequency of up to 500 Hz. The measurement frequency is an important indicator for assessing the quality of a diameter measuring instrument. When measuring rapidly moving rolled products, the higher the measurement frequency and the smaller the spacing between measurement points, the greater the likelihood of detecting defects in the products. A straightness measuring instrument can accurately measure the straightness dimensions of various parts. It performs testing continuously. 3. No jitter error: In automatic detection, measurement errors caused by the jitter of the rods represent a challenge for technicians in this industry. Multiple synchronization technologies and electronic shutters in the straightness measuring instrument help to eliminate measurement errors caused by vibrations of the object being measured. 4. The straightness measuring instrument with out-of-tolerance alarm allows for the setting of positive and negative tolerances; when the measured values exceed these set limits, the alarm system is activated to provide audible and visual alerts. Under the reform model of factory automation production, traditional manual measurement methods are no longer suitable for high-speed automated production. The automatic measurement mode of the straightness tester provides more accurate detection data, faster data acquisition, and a more convenient testing process; it will be an important choice for various applications that require the measurement of straightness in bars, rods, and tubes in the future.