1、 Working principle of high-temperature corrosion detector:

This high-temperature corrosion detector is based on advanced EMA electromagnetic ultrasonic testing technology. EMA and traditional piezoelectric ultrasonic belong to the category of ultrasonic testing, and their essential differences lie in the different excitation methods and transducers. Piezoelectric ultrasonic transducers are based on the piezoelectric effect of piezoelectric chips to excite and receive ultrasonic waves, and energy conversion is carried out on the chips. EMAT is based on electromagnetic effects to excite and receive ultrasonic waves. Its energy conversion is directly carried out within the skin layer on the surface of the workpiece, so it does not require any coupling medium.

The EMA probe mainly consists of three parts: high-frequency coil: used to generate high-frequency excitation magnetic field; Magnet: used to provide an external magnetic field, it can be a long-lasting magnet or DC electromagnet, as well as an AC electromagnet or pulse electromagnet; Workpiece: The object being tested is a part of the EMA probe and must have conductivity. And high-temperature EMAThe probe uses high-temperature resistant components, and its working temperature can reach600Degree.

EMA can excite all ultrasonic modes: longitudinal waves, horizontal shear waves, Lamb waves, plate waves, etc. The longitudinal wave mode is used for corrosion detection. Electromagnetic ultrasonic transducers can excite various modes of ultrasonic waves. Similar to traditional ultrasonic technology, the selection of beam angle and acoustic wave mode is determined by the material, expected discontinuity position, and orientation. When using an electromagnetic ultrasonic transducer, it is necessary to correctly select the sound wave mode. It is necessary to know the geometric shape of the inspected workpiece, the approximate position, size, orientation, and reflectivity of the expected discontinuity, as well as the allowable lifting range of the electromagnetic ultrasonic transducer and the physical laws of ultrasonic propagation.

2、 Function Description

This corrosion detection equipment is based on electromagnetic ultrasonic technology and is a non-contact detection technology. It can be applied to automatic high-speed detection and moving objects

Body detection, detection in remote or hazardous environments, detection under high temperature conditions, and detection under rough surface conditions, including surface detection, internal detection, and residual thickness measurement.

3、 Technical specifications

1. measurement rangeSteel .………2.0----200.00mm

aluminium………………………………………………………………2.0----100.00mm

2. The acceptable minimum basic error of measuring equipment under the following conditions:

Measurement range:2.0 --20 mm，mm.................................................................................... ±0.06

Measurement range:20.0 --200 mm，mm........................................................ ±(0.001N)_x+0.06)

3. Acceptable additional errors on rough or smooth surfaces,mm

Rz = 40 μm ………………………………………±0.1;

Rz = 80Mm...................................................................................................±0.15;

Rz = 160 μm. .....................................................................................................±0. 2;

4. Experiment on the curvature of the test surface * small average value,mm . ...........................................................................10;

5. The additional error of limiting acceptable values is a fine error for the thickness gauge to detect thickness of standard samples as the small radius of curvature of the cylinder is equal to the large radius.

6. The gap size of non-conductive coatings shall not exceed,mm...................................................................................6;

7. Automatically cut off the circuit board from the power supply3The device will start preparing to measure immediately in minutes.;

8. After the backlight of the device's display automatically turns off10Entering standby mode in seconds;

9. Working outdoors for a considerable amount of time,hours…………………………………………………………….8;

10. The total amount of memory can store the number of measurement data, ultrasonic echo images, etc. 1024;

11. Continuously connect the computerRS-232, transmission speed,bands. ..............................................................57600;

12. Equipment operating temperature range, ° С ………………………………………………......….-10-------+50;

13. Continuity detection interval, nanoseconds .300;

14. Pulse repetition frequency,HZ………………………………………………………………………. .10.0;

15. Overall dimensions, mm…………………………………………………………………170x100x82;

16. Weight,KG…………………………………………………………………………………. .1.6;

17. Working temperature of high temperature probe: 600C;

18. Working mode: A-Scan, B-Scan;

High temperature corrosion detector UT-04 EMA High temperature corrosion detector UT-04 EMA High temperature corrosion detector UT-04 EMA High temperature corrosion detector UT-04 EMA High temperature corrosion detector UT-04 EMA