Contact Us
400 Phone Number:+864001078007
Contact number:+8615010482279
Email: 15010482279@139.com
Company Address: Room 1001, Unit 4, Building 1, No. 69 Chaoyang Road, Chaoyang District, Beijing
VD-90
It can directly detect corroded surfaces without the need for sanding.
Detectable cracks in threads
Identifiable crack depth
You can upload the data to your computer for further analysis using specialized software.
- Commodity name： VD-90
Email:
15010482279@139.com
- Product Description
-
Portable Eddy Current Flaw Detector
Compact and portable
Easy to operate
No need for polishing
Crack depth
Visual Analytics
Detection Principle and Method
The flaw detector works by inducing eddy currents in the product being inspected, which then generate a signal at the transducer output. The amplitude and phase of this signal are determined by the effective secondary eddy current field.
The sinusoidal voltage from generator 1 is fed to the inputs of shapers 9 and 10. Based on commands from the microprocessor, driver signal generator 9 produces a sine wave with the desired amplitude and frequency, which is then routed to the drive winding of converter 2.
The output of converter 2 is connected to amplifier 3, which features automatic gain control (ARC) 11. The ARC enables effective operation within a range of variations in the gap between the transducer tip and the controlled surface.
The signal from the output of amplifier 3 is fed to one input of phase detector 4. Meanwhile, the sinusoidal carrier voltage—from reference signal shaper 10, which is combined with phase shifter 8—is routed to the second input of phase detector 4, where the phase difference between the two signals is measured.
Additionally, the output from amplifier 3 is fed into the input of A/D amplitude converter 13 via the signal from amplitude detector 12. The resulting amplitude value is then sent to microprocessor 7.
The output signal from phase detector 4 is transmitted to processor 7 via programmable amplifier 5 and A/D converter 6.
The microprocessor 7 processes the output signals from A/D converters 6 and 13, sends the information to display 15, stores the data in memory unit 14, and transmits it to a personal computer via the Bluetooth interface.
The piezoelectric buzzer serves as a sound indicator 16.
The eddy current transducer (left image) is designed to convert non-electrical quantities—manifested as local continuity disturbances—into electrical signals by inducing eddy currents in the controlled product and subsequently extracting their parameters (amplitude and phase). These are determined by the effective secondary eddy current field.
The instrument is equipped with a transformer-type differential converter featuring three coaxial coils. A sinusoidal voltage is applied to the primary (middle) winding. The secondary signal windings are connected in series in a differential configuration, ensuring minimal initial imbalance in the converter when it is removed from the controlled product. Additionally, the connector of the converter’s connecting cable includes an indicator light that provides an extra visual signal for detecting any defects.
Main applications
Test Block Surface Inspection
Corrosion Specimen Surface Inspection
Thread Internal Crack Detection
Crack Depth Detection
Detection and Evaluation of Pipeline Cracks
Aerospace Industry Testing
Railway Industry Inspection
Instrument parameters
Excitation current frequency
1kHz-2MHZ
Operating temperature
-30°C to +50°C
Threshold defect
From 0.1 millimeters
During work breaks
Up to 10 millimeters
Bluetooth interface
Protection Level
IP54
Battery weight
0.4 kilograms
Measure defect depth in millimeters
Working hours
Lasting up to 20 hours
From static and the impact of static work intervals on detuning
Control language
English, Russian, Chinese
Keywords:
Honorary Qualifications
Frequently Asked Questions
Can't charge the device?
The device may have been left unused for too long, causing the battery to lose charge. You can try charging it for an extended period. If there’s still no response, we recommend sending it in for repair. Also, please use the dedicated charger provided for each device when charging.
Can't connect the thickness gauge's flat plate to the instrument?
First, turn on the tablet’s hotspot and check whether the eight-digit number in the hotspot name matches the eight-digit SN code of the device. If they don’t match, make the necessary adjustments. Then, follow the instructions in the manual to connect the tablet. If you’re still unable to proceed, we recommend contacting customer support for assistance.
How can I fix the issue of fluctuating readings during thickness measurement?
It is recommended to connect the flat plate during the thickness measurement process and observe the waveform. If the waveform appears poor, switch to manual mode for inspection. If no consistent waveform is detected, consider potential material issues or probe damage—replace the probe and try again. If no waveform still appears after replacing the probe, the material itself may be of poor quality, making it unable to generate an effective signal.
Get a quote
*Note: We will contact you within 1 business day. Please check your email at 15010482279@139.com.
Beijing Precision Testing: Crafting High-Quality Testing Services for You
400 Phone Number:+864001078007
Contact number:+8615010482279
Email: 15010482279@139.com
Company Address: Room 1001, Unit 4, Building 1, No. 69 Chaoyang Road, Chaoyang District, Beijing
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