Ultrasonic thickness gauge principle and use tips
A, ultrasonic thickness gauge is based on the principle of ultrasonic pulse reflection to thickness measurement, when the probe emitted ultrasonic pulse through the object under test to reach the material interfaces, the pulse is reflected back to the probe through the ** measurement of ultrasonic propagation time in the material to determine the thickness of the material under test. Where the ultrasonic wave can be made to a constant speed in its internal propagation of a variety of materials can be measured using this principle.
Ultrasonic thickness gauge is the use of * new high-performance, low-power microprocessor technology, based on the principle of ultrasonic measurement, you can measure the thickness of metal and a variety of other materials, and can be the speed of sound of the material to measure. It can measure the thickness of various pipelines and pressure vessels in production equipment, monitor the degree of thinning after they are corroded in the process of use, and can also measure various plates and various processed parts.
The principle of ultrasonic thickness measurement is similar to the principle of light wave measurement, when the ultrasonic pulse emitted by the probe through the object under test reaches the material interface, the pulse is reflected back to the probe by measuring the ultrasonic propagation time in the material to determine the thickness of the material under test. Where the ultrasonic wave can be made to a constant speed in its internal propagation of a variety of materials can be measured using this principle.
This thickness gauge adopts the principle of pulse reflection ultrasonic measurement, suitable for ultrasonic waves can be a constant speed in its internal propagation, and can be reflected from the back of the measurement of the thickness of various materials. This instrument can be a variety of plates and a variety of processed parts for ** measurement. Can be widely used in petroleum, chemical, metallurgy, shipbuilding, aviation, aerospace and other fields.
Second, the use of skills
General measurement
1. two thickness measurements with the probe at one point, the split surface of the probe should be 90° to each other in the two measurements, and take the smaller value as the thickness value of the measured workpiece.
2.30mm multi-point measurement method: when the measurement value is unstable, take a measurement point as the centre, in a circle with a diameter of about 30mm for several measurements, and take the smaller value as the thickness value of the measured workpiece.
Increase the number of measurements around the specified measurement point, and the thickness change is indicated by the iso-thickness line.
Continuous measurement method
Continuous measurement along a specified route with a single point at intervals of no more than 5mm.
Grid measurement method
A grid is drawn in the specified area, and the thickness is measured and recorded according to the point. This method is widely used in high pressure equipment, stainless steel lining corrosion monitoring.
