Reasons for using laser thickness gauge to measure plate thickness
Nowadays, manufacturers pay more and more attention to the degree of automation in production, so the thickness measurement of plates is also constantly developing toward automation. Laser thickness gauges are now commonly used online thickness measurement equipment, with high measurement accuracy, good real-time performance, and no radiation hazards. and many other advantages.
The laser thickness gauge is composed of two opposing laser ranging sensors. When working, the upper and lower sensors respectively measure the distance between the sensor and the upper and lower surfaces of the object to be measured, and subtract it from the total distance between the two sensors. The distance measured by the two sensors can be used to obtain the thickness of the object being measured.
1. Comparison between laser thickness gauge and radiation thickness gauge
Radiographic thickness measurement is related to the temperature and material of the object to be measured. Although it can be corrected, there are residual errors. For a given detection sensitivity, as the measured thickness increases, the radiation energy increases exponentially to ensure the same measurement accuracy, thus limiting its application in online thickness measurement of medium and thick plates. To maintain the same measurement accuracy and the same response time, if the thickness of the same measured material is doubled, the required radiation dose will increase to 7.8 times. Therefore, when measuring the thickness of a thicker metal plate using radiation thickness measurement, its energy increases sharply as the thickness increases.
Laser thickness gauges are not affected by the temperature and material of the object to be measured, and can achieve high-precision online measurement. At the same time, because radioactive thickness gauges contain radiation, there are many related review procedures. However, laser thickness gauges are not harmful and can be used with confidence. , ready to use.
2. Laser thickness gauge and capacitive thickness gauge
Capacitive thickness measurement essentially measures the size of the air gap δ and the thickness of the medium. This variable gap measurement method can be used to measure conductive materials and uniform non-conductive materials. It can measure 5mm in China and 10mm in foreign countries.
Capacitance thickness gauges cannot measure larger thickness plates, but laser thickness gauges are not subject to this limitation. The thickness of large plates can also be measured online. The measurement range is wide and can be customized according to the thickness value of the production plate.
3. Ultrasonic thickness gauge
The ultrasonic thickness gauge is also affected by the material and needs to be in contact with the plate being measured.
Laser thickness gauges can perform non-contact online measurements with higher measurement accuracy.
The laser thickness gauge effectively improves the working environment. It has the advantages of accurate measurement, high precision, good practicability, safety and reliability, no radiation, non-contact measurement and other manual measurements and other measurement methods, and is the ideal tool for rolling steel thickness. Control provides accurate information, thereby improving production efficiency and product quality, and reducing labor intensity.
