CN202256587U - Linear type ultrasonic phase array sensor capable of adjusting distance between array elements - Google Patents
Linear type ultrasonic phase array sensor capable of adjusting distance between array elements Download PDFInfo
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- CN202256587U CN202256587U CN2011203749659U CN201120374965U CN202256587U CN 202256587 U CN202256587 U CN 202256587U CN 2011203749659 U CN2011203749659 U CN 2011203749659U CN 201120374965 U CN201120374965 U CN 201120374965U CN 202256587 U CN202256587 U CN 202256587U
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Abstract
The utility model relates to a linear type ultrasonic phase array sensor capable of adjusting distance between array elements, which is used for monitoring and positioning the local discharge of an electrical device. The sensor is composed of an array element seat and a plurality of cylindrical array elements, wherein three groups of array element grooves are arranged on the array element seat, the number of the array element grooves in each group is respectively same to the number of the cylindrical array elements, the array element grooves in the same group are uniformly distributed along the straight line, the distances among the array element grooves of the three groups are different, the inner diameter of each array element groove is matched with the outer diameter of the cylindrical array element. Three groups of array element grooves are set on the array element seat and because the distances among the array element grooves of the three groups are different, the array elements are inserted into array element grooves of different groups to obtain different array element distances and three groups of data corresponding to different ultrasonic frequencies can be collected after each detection, the information amount of the partial discharge detection is greatly enriched and the positioning accuracy of the partial discharge is increased.
Description
Technical field
The utility model relates to a kind of sensor that is used to detect the ultrasonic signal that local discharge of electrical equipment produces, and belongs to the detection technique field.
Background technology
Along with development and national economy, people are increasingly high to the reliability requirement of power equipment.To the statistical results show of physical fault, shelf depreciation is the main cause that causes the power equipment insulation fault and then influence the normal operation of power equipment.Therefore, accurately detect the position of shelf depreciation, the maintainer is shot the arrow at the target in maintenance process,, guarantee that the normal operation of power equipment is significant improving the maintenance level.
The ultrasound phase-control array sensor is a partial discharge detecting sensor based commonly used at present, and it comprises a plurality of equidistant array elements along line spread, and array element distance is the key parameter of ultrasound phase-control array sensor, is determining the receptivity of sensor.Theoretical analysis shows that when ultrasonic phase array sensor array element spacing equaled to receive signal half-wave long value, receptivity was best.
Existing ultrasound phase-control array sensor generally all is that (the supposition velocity of wave is 1500m/s for the pairing half-wavelength of centre frequency (being generally 150kHz) with type local-discharge ultrasonic ripple signal; Then half-wavelength is 5mm) as array element distance; And be fixed on array element on the array element seat, array element distance can't change flexibly.But the ultrasonic signal that local discharge of electrical equipment produces is that a dominant frequency is distributed in the broadband signal between the 80k-240k; Only obviously can't obtain the accurate information of shelf depreciation energy and discharge position by its center frequency points signal; And the diversity of shelf depreciation pattern and the complicacy of ultrasonic wave propagation path in the distinct device, make that the center frequency points of each type local-discharge ultrasonic ripple signal is all different.Therefore, not ideal enough based on the shelf depreciation bearing accuracy of conventional ultrasound phased-array transducer, be necessary to improve.
The utility model content
The purpose of the utility model be to overcome prior art deficiency, provide a kind of array element distance adjustable linear type ultrasound phased-array transducer, to improve the bearing accuracy of shelf depreciation.
The said problem of the utility model realizes with following technical proposals:
The linear type ultrasound phased-array transducer that a kind of array element distance is adjustable; Form by array element seat and a plurality of cylindric array element; Said array element seat is provided with three groups of array element grooves, and the individual number average of every group of contained array element groove of array element groove is identical with the number of cylindric array element, and same group array element groove is equidistantly arranged along straight line; The separation of three groups of array element grooves has nothing in common with each other, and the internal diameter of each array element groove and the external diameter of cylindric array element are complementary.
The linear type ultrasound phased-array transducer that above-mentioned array element distance is adjustable, said three groups of array element grooves are arranged on the same straight line and their the first array element groove overlaps fully.
The linear type ultrasound phased-array transducer that above-mentioned array element distance is adjustable; Said cylindric array element comprises the piezoelectric vibrator of a column; The receiving plane of said piezoelectric vibrator front end is provided with the stainless steel cuticula; Remainder is coated by Stainless Steel Shell, between Stainless Steel Shell and piezoelectric vibrator, is provided with silicon rubber filling, and the signal lead of piezoelectric vibrator connects signal pickup assembly.
The linear type ultrasound phased-array transducer that above-mentioned array element distance is adjustable, the rear end of said piezoelectric vibrator is provided with the acoustic damping piece.
The utility model is provided with three groups of array element grooves on the array element seat; Because the separation of three groups of array element grooves has nothing in common with each other; Therefore the array element groove that array element is inserted different groups can obtain different array element distance; For detecting three groups of data gathering corresponding different ultrasonic frequencies each time, greatly enrich the quantity of information of Partial Discharge Detection like this, improved the bearing accuracy of shelf depreciation.Array element is that instant-plugging is connected with the array element seat, and the conversion of array element distance is very convenient.It is in order to save the space, to dwindle the volume of array element seat that three groups of array element grooves are arranged on the same straight line.
Description of drawings
Below in conjunction with accompanying drawing the utility model is further specified.
Fig. 1 is the structural representation of the utility model;
Fig. 2 is the longitudinal section synoptic diagram of single array element;
Fig. 3 is the A-A cut-open view;
Fig. 4 is the structural representation of array element seat;
Fig. 5 is the B-B cut-open view.
Each label is among the figure: 1, cable; 2, gland nut; 3, stainless steel cover; 4, signal lead; 5, rectangular loop; 6, acoustic damping piece; 7, piezoelectric vibrator; 8, Stainless Steel Shell; 9, silicon rubber filling; 10, stainless steel cuticula; 11, array element groove; 12, array element seat; 13, array element.
Embodiment
Like accompanying drawing 2, shown in 3, the array element of the utility model adopts cylindrical structure, and the cross section is a disc, and the material of piezoelectric vibrator 7 is a piezoelectric ceramics, and radius 2mm, array element thickness are 12mm.
Shown in accompanying drawing 2, piezoelectric vibrator 7 afterbodys install acoustic damping piece 6 additional, and thickness is 5mm, and uniform silicon rubber filling 9 is smeared in the periphery, and thickness is 0.3mm.
The element number of array of this line style ultrasound phase-control array sensor is 7, and structure, material are identical.
Like accompanying drawing 4, shown in 5, the external form of the array element seat 12 of this line style ultrasound phase-control array sensor is a rectangular structure, and length is 48.6mm, 6.6mm, 12mm respectively, and its material is the stainless steel material with ferromagnetic function.
Shown in accompanying drawing 5, be the engraved structure of 18 cylindrical holes in the middle of the array element seat 12 of this line style ultrasound phase-control array sensor, the cylindrical hole radius is 2.5mm.The cylindrical hole position of hollow out is to be benchmark with first cylindrical hole, from left to right, and respectively at a distance of six 5,6,7mm place.Constitute three groups of linear arraies that are made up of 7 array elements, every group array element center distance is 5,6,7mm.
This line style ultrasound phase-control array sensor can directly be placed in the electrical equipment outer wall; Array element is inserted in the corresponding spacing hole; Insert high-speed data synchronous acquisition device through 7 cables; Can obtain the type local-discharge ultrasonic signal of coupling and form Array Model, for realizing that putting detection based on the office of phased array establishes good basis.
Claims (4)
1. linear type ultrasound phased-array transducer that array element distance is adjustable; It is characterized in that; It is made up of array element seat (12) and a plurality of cylindric array element (13); Said array element seat (12) is provided with three groups of array element grooves (11), and the individual number average of every group of contained array element groove of array element groove is identical with the number of cylindric array element (13), and same group array element groove (11) is equidistantly arranged along straight line; The separation of three groups of array element grooves has nothing in common with each other, and the external diameter of the internal diameter of each array element groove (11) and cylindric array element (13) is complementary.
2. the linear type ultrasound phased-array transducer adjustable according to the said array element distance of claim 1 is characterized in that, said three groups of array element grooves (11) are arranged on the same straight line and their the first array element groove overlaps fully.
3. according to claim 1 or the adjustable linear type ultrasound phased-array transducer of 2 said array element distance; It is characterized in that; Said cylindric array element (13) comprises the piezoelectric vibrator (7) of a column; The receiving plane of said piezoelectric vibrator (7) front end is provided with stainless steel cuticula (10); Remainder is coated by Stainless Steel Shell (8), between Stainless Steel Shell (8) and piezoelectric vibrator (7), is provided with silicon rubber filling (9), and the signal lead (4) of piezoelectric vibrator (7) connects signal pickup assembly.
4. the linear type ultrasound phased-array transducer adjustable according to the said array element distance of claim 3 is characterized in that the rear end of said piezoelectric vibrator (7) is provided with acoustic damping piece (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203749659U CN202256587U (en) | 2011-09-28 | 2011-09-28 | Linear type ultrasonic phase array sensor capable of adjusting distance between array elements |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203749659U CN202256587U (en) | 2011-09-28 | 2011-09-28 | Linear type ultrasonic phase array sensor capable of adjusting distance between array elements |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202256587U true CN202256587U (en) | 2012-05-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203749659U Expired - Fee Related CN202256587U (en) | 2011-09-28 | 2011-09-28 | Linear type ultrasonic phase array sensor capable of adjusting distance between array elements |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202256587U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107966206A (en) * | 2017-11-07 | 2018-04-27 | 华北电力大学（保定） | A kind of array signal denoising method of fiber ultrasonic sensor array |
| CN113171117A (en) * | 2021-03-29 | 2021-07-27 | 聚融医疗科技(杭州)有限公司 | Probe with adjustable array element spacing in use process and preparation method thereof |
-
2011
- 2011-09-28 CN CN2011203749659U patent/CN202256587U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107966206A (en) * | 2017-11-07 | 2018-04-27 | 华北电力大学（保定） | A kind of array signal denoising method of fiber ultrasonic sensor array |
| CN107966206B (en) * | 2017-11-07 | 2019-01-04 | 华北电力大学（保定） | A kind of array signal denoising method of fiber ultrasonic sensor array |
| CN113171117A (en) * | 2021-03-29 | 2021-07-27 | 聚融医疗科技(杭州)有限公司 | Probe with adjustable array element spacing in use process and preparation method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120530 Termination date: 20130928 |