CN202854095U - Busbar flaw detection device of low voltage electrical apparatus test station - Google Patents
Busbar flaw detection device of low voltage electrical apparatus test station Download PDFInfo
- Publication number
- CN202854095U CN202854095U CN201220243803.6U CN201220243803U CN202854095U CN 202854095 U CN202854095 U CN 202854095U CN 201220243803 U CN201220243803 U CN 201220243803U CN 202854095 U CN202854095 U CN 202854095U
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- Prior art keywords
- busbar
- flaw detection
- detection device
- bus bar
- electrical apparatus
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
The utility model provides a busbar flaw detection device of a low voltage electrical apparatus test station. The busbar flaw detection device is composed of an exciting circuit, a transmitting transducer, a receiving transducer, a receiving circuit, and the like. An exciting signal is generated by modules of a frequency synthesizer, and the like, and busbar defects are analyzed by the receiving circuit according to the detected signal. By utilizing the busbar flaw detection device, the surface and internal defects of a busbar can be fast detected, the detection device is convenient in installation and use, low in cost and high in detection precision, and a wide range of flaw detection can be carried out.
Description
Technical field
The utility model relates to a kind of low-voltage electrical apparatus testing station bus bar failure detector, belongs to technical field of nondestructive testing.
Background technology
In the low-voltage electrical apparatus test unit, the bus bar long-time running is subject to the factor effects such as electric power and causes easily surface and inherent vice, causes potential safety hazard, need to make regular check on bus bar is regular.Therefore, the pick-up unit that provides a kind of surface to bus bar and inherent vice to detect a flaw is provided, can be suitable in bus bar surface and inner carrying out flaw detection on a large scale, assess the degree of defective by analyzing resulting information, claimed apparatus must be able to be easy to install, be applicable to that crackle class defects detection is had the characteristics of accuracy of detection height, concentration of energy.
The utility model content
The purpose of this utility model provides low-voltage electrical apparatus testing station bus bar failure detector, and this device probe variation is flexible, accuracy of detection is high, simple operation, need not couplant, strong adaptability, and requires low to the surface flatness of bus bar.
The technical solution adopted in the utility model is: this failure detector is comprised of exciting circuit, transmitting transducer, receiving transducer and receiving circuit, exciting circuit adopts Direct Digital Synthesizer to produce continuously adjustable square-wave signal, by being encouraged the generation eddy current and sent ultrasonic signal in bus bar by transmitting transducer after amplifying, receiving transducer and receiving circuit carry out the bus bar carrying out flaw detection according to the ultrasonic signal that detects.
Description of drawings
Fig. 1 is the synoptic diagram of the utility model embodiment.
Fig. 2 is the signal processing system figure of the utility model embodiment.
Embodiment
Below by specific instantiation embodiment of the present utility model is described, those skilled in the art can understand advantage of the present utility model and effect easily by the content that instructions discloses.The utility model also can be implemented or used by other different instantiations, and the every details in this instructions also can be based on different viewpoints and application, carries out various modifications and change under the spirit of the present utility model not deviating from.
The synoptic diagram of the utility model embodiment and signal processing system figure are respectively as depicted in figs. 1 and 2.
The system that Fig. 1 provides this device forms: 1-transmitting transducer module, and 2-receiving transducer module, the 3-bus bar, 4-receives signal processing module.Transducer module comprises: A-inflection coil, and the B-permanent magnet, C-magnetic field, D-has children outside the state plan ripple, E-bus bar.
The transmitting transducer of this device is identical with the receiving transducer structure.As shown in Figure 2, exciting circuit adopts the Direct Digital Synthesizer DDS of Micro-processor MCV control to produce continuously adjustable square-wave signal, be input among the FPGA, by changing the square wave frequency of DDS, just can realize the change of output pulse frequency, control signal is obtained by the clock signal frequency division of FPGA, and update routine can regulating frequency.In radio-frequency coil, produce continuous square-wave pulse by FPGA output pulse, because the square-wave pulse signal power that FPGA produces is less, voltage magnitude is very low, need between signal generating circuit and power amplification circuit, place driving circuit and come driving power MOSFET pipe, cut-offfing of MOSFET controlled in the pulse of exporting behind overdrive circuit, and direct current signal is become AC signal.Pulse voltage will rise to certain voltage this moment, then be input in the transmitting coil.Pulse is amplified by power amplification circuit, then passes into to obtain large electric current in the transmitting coil, and the exchange current of generation encourages in bus bar and produces eddy current, and power amplification circuit adopts the push-pull type amplifying circuit.Exchange current passes in the loop A of transducing head, the magnetic field that exchange current changes, bus bar E has electric current and produces in changing magnetic field, electric current in the effect Down Highway row of permanent magnet B can be subject to long-range navigation magnetic force, orderly collision can occur in the electronics in the bus bar and lattice under the effect of long-range navigation magnetic force, propagate in bus bar so can produce ultrasound wave D.Ultrasound wave runs into the bus bar defective and can change, can isolated-phase buses row degree of impairment according to the ultrasonic signal that receiving trap receives.
Above-described embodiment only is exemplary illustration principle of the present utility model and effect thereof, but not is used for restriction the utility model.Any those skilled in the art all can be under spirit of the present utility model and category, and above-described embodiment is modified and changed.Therefore, right of the present utility model is protected scope, should be take the scope of claims as foundation.
Claims (1)
1. low-voltage electrical apparatus testing station bus bar failure detector, it is characterized in that, formed by exciting circuit, transmitting transducer, receiving transducer and receiving circuit, exciting circuit adopts Direct Digital Synthesizer to produce continuously adjustable square-wave signal, by being encouraged the generation eddy current and sent ultrasonic signal in bus bar by transmitting transducer after amplifying, receiving transducer and receiving circuit carry out the bus bar carrying out flaw detection according to the ultrasonic signal that detects.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220243803.6U CN202854095U (en) | 2012-05-29 | 2012-05-29 | Busbar flaw detection device of low voltage electrical apparatus test station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220243803.6U CN202854095U (en) | 2012-05-29 | 2012-05-29 | Busbar flaw detection device of low voltage electrical apparatus test station |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202854095U true CN202854095U (en) | 2013-04-03 |
Family
ID=47985279
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201220243803.6U Expired - Lifetime CN202854095U (en) | 2012-05-29 | 2012-05-29 | Busbar flaw detection device of low voltage electrical apparatus test station |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202854095U (en) |
-
2012
- 2012-05-29 CN CN201220243803.6U patent/CN202854095U/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130403 |
|
| CX01 | Expiry of patent term |