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Acoustic imager U1 (power station version)
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Product Characteristics
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MEMS Microphone
132 digital MEMS microphones; frequency range 1K~100kHz
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Capacitive Touchscreen
8-inch IPS touchscreen with full viewing angle and high brightness, resolution 1280*800
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Working Distance
Working distance 0.5 meters to 120 meters
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Adjustable Focus
Camera with adjustable zoom, real-time frame rate up to 25fps
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Multi-Source
Supports multi-source mode, each source can display real-time amplitude
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Monitorable
Supports headphone monitoring function, allowing real-time monitoring of audio signals;
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Fast Charging Protocol
Type-C charging port, supports fast charging protocols such as PD, up to 60W
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Other
Auxiliary Lighting;
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Product Application
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Project |
Performance Indicators |
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Acoustic Sensing and Imaging |
Number of Microphones |
132 digital MEMS microphones |
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Frequency Range |
1KHZ~100KHZ |
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Working Distance |
0.5m to 120m |
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Field of View (FOV) |
63° ± 5° |
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Nominal Frame Rate |
25FPS |
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Visible Light Camera |
Resolution |
5 Megapixels |
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Field of View (FOV) |
63° ± 5° |
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Image Mode |
Color |
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Focus |
2x zoom |
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Screen |
Display |
8" high-brightness IPS LCD screen, with backlight, clearly readable in sunlight |
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Resolution |
1280x800 |
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Touch Screen |
10-point touch, capacitive |
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Image Storage |
Storage /Storage Capacity |
32G (part used for program storage) |
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Image Format |
JPG |
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Video Format |
MP4 |
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Save Video |
With photo and video recording functions, it can convert sound wave test signals into visual images, videos and audio data |
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Headphone Monitoring and Recording Function |
It has the function of headphone monitoring sound source, and also has video recording function |
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Acoustic Measurement and Analysis |
Sound Pressure Level Range (Typical Value) |
12.1dB SPL to 114.6 dB SPL (±1 dB SPL 2 kHz) |
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Automatic Maximum / Minimum dB Gain |
The size of the spot display can be manually adjusted to accurately locate the fault point |
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Band Selection |
The frequency range can be manually adjusted |
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User Profile |
User configurable file for saving custom settings |
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Source Visualization Mode |
Users can choose between single-source or multi-source detection |
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With sound spectrum function |
Add PRPD diagram diagnostic function, which can directly display the phase diagram of the sound signal on the screen for intuitive judgment of the fault type. |
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With center point marking function |
Can be set to display or not display |
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Infrared Module (Optional) |
Supports infrared module |
384*288, 7.5μm~14μm ±2℃ or ±2% of the measured value in the central area of the field of view (°C) Can display maximum, minimum, and center point temperature values |
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LED Fill Light |
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Available 2 LED fill lights |
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Communication |
4G |
Supports 4G full Netcom, built-in antenna |
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Wi-Fi/Bluetooth |
Supports Wi-Fi/Bluetooth, built-in antenna |
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Interface |
USB Port |
One One USB3.0-A port for data export |
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TYPE-C Port |
One TYPE-C charging port, supports PD and other fast charging protocols, maximum 60W fast charging power |
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TF Card |
Equipped with a 64GB TF card for data storage |
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SIM Card Slot |
One SIM card slot |
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Button |
One power button, supports power on/off, sleep, and wake-up functions |
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Headphone |
Headphone jack |
One 3.5mm headphone jack, supports real-time headphone monitoring of the sound source |
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Mechanical |
Dimensions ( L*W*H) |
260mm*170mm*38mm |
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Weight |
1.5kg |
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Protection Level |
IP54 |
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Power Supply |
Battery Type |
Lithium-ion rechargeable battery, capacity 4900mAH |
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Endurance Time |
Approximately fully charged 4 hours, equipped with a power bank, can double the battery life |
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Charging Method |
TYPE-C port charging, supports fast charging protocols such as PD, maximum support 60W fast charging Charging Temperature: 0 ° C~45°C |
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Environmental Requirements |
Operating Temperature |
-20 ° C~50 ° C |
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Storage Temperature (without battery) |
-20 ° C~60 ° C |
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Humidity |
10%～95%, non-condensing |
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Product Parameters
I. Partial Discharge
In power systems, insulation defects are common faults. Before an insulation defect occurs, there is a common characteristic: partial discharge. Each partial discharge has some impact on the insulating medium, reducing its insulation strength. If insulation damage occurs, it will cause damage to electrical equipment or even endanger personnel safety. For many years, power companies have performed partial discharge measurements on high-voltage electrical equipment; partial discharge is a measure of insulation degradation. Accompanied by partial discharge, cracking-like acoustic emission is generated during the process, producing ultrasonic waves that quickly propagate to the surroundings. An intelligent acoustic imager is an intuitive and easy-to-use tool that can identify the acoustic frequency of partial discharge. Using an array of 132 highly sensitive digital microphones, it converts the collected sound into a visible light image, presenting it on the screen in the form of a graph, helping the team to detect and discover partial discharge early.
II. Common Types of Partial Discharge
1. Corona Discharge: This common form of partial discharge occurs when charges are directly dissipated from sharp surfaces of conductors into the air. (This is the cause of sound and radio frequency emissions.) Generally, corona discharge does not need to be worried about from a damage or safety perspective.
2. Arc Discharge: Arc discharge is a long-lasting discharge produced by gas breakdown. Plasma is generated when current flows through air or any other normally non-conductive medium.
3. Surface Discharge: When the discharge propagates along the surface of the insulation, it is called surface discharge or surface tracking. It can be one of the most destructive types of partial discharge. Contamination and weathering of the insulator surface are two of the most common causes of surface discharge. In medium and high voltage equipment, this discharge occurs when the insulation is damaged (usually due to high humidity or poor maintenance). Moisture ingress is also a common cause of surface discharge.
4. Air Gap (Internal) Discharge: This is usually caused by defects in solid insulation such as cables, bushings, GIS joints, etc. Air gap discharge is extremely destructive to insulation and usually continues to expand until it causes complete failure.
III. Losses Caused by Partial Discharge
IV. Comparison of Traditional Methods and Intelligent Acoustic Imagers
V. Test Site
VI. Test Report Analysis
VII. Frequently Asked Questions
1. Can partial discharge of insulators be seen with an infrared thermal imager?
Answer: Possibly. When partial discharge occurs in an insulator, it may cause the temperature of the discharge area to rise, but this is not always the case. There is also the possibility that the temperature does not change or the change is very small and cannot be detected by a thermal imager. Therefore, it is better to use an acoustic imager to detect partial discharge, and an infrared thermal imager can be used as an auxiliary tool.
2. How far can an acoustic imager measure?
Answer: The detection distance is related to the size of the partial discharge point on site, the voltage level, and the discharge intensity. According to field tests, for common partial discharge faults, the general actual detection distance is generally 0.5-60 meters.
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