CN103454347B - The device and method that ultrasound examination speaker net is bad - Google Patents
The device and method that ultrasound examination speaker net is bad Download PDFInfo
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- CN103454347B CN103454347B CN201310284814.8A CN201310284814A CN103454347B CN 103454347 B CN103454347 B CN 103454347B CN 201310284814 A CN201310284814 A CN 201310284814A CN 103454347 B CN103454347 B CN 103454347B
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Abstract
The device that a kind of ultrasound examination speaker net is bad, comprise frame (22) and be loaded on blowing module (20) in frame (22) successively, draw material module (25) and rewinding module (24), ultrasound examination support (23) is had drawing the middle part of material module (25), a kind of method that ultrasound examination speaker net is bad, comprise startup, sampling, filtration, level and smooth, secondary is level and smooth, compare, stop, detecting, judge 9 steps, its advantage is that device and method is simple, accurately can detect speaker net carrying material defective products.
Description
[technical field]
The present invention relates to microphone annex, relate to the testing apparatus utilizing acoustic irradiation, the device and method that espespecially a kind of ultrasound examination speaker net is bad.
Device and method.
[background technology]
Speaker net is used in the annex such as receiver, loudspeaker of electroacoustic equipment, the screen net structure that general employing is intensive, does not affect sound result of broadcast with the requirement meeting dustproof and waterproof simultaneously.Usually be adhesively fixed with the shell of water white film class pressure sensitive adhesive and electroacoustic equipment.
The current production equipment of this series products generally adopts plate cutting machine or dise knife die-cutting machine.In process, there is the situation of omitting colorless and transparent film class pressure sensitive adhesive waste material in printing to occur, the waste material of omitting in printing causes sound transmission effect bad, industrial conventional pick-up unit and mode all insensitive to this type of material, once produce bad, detect just very thorny, and there is many deficiencies such as efficiency is low, quality is uncontrollable in manual detection.Bad for loudspeaker guipure series products, lacks a kind of reliable and detection means efficiently for a long time always.
[summary of the invention]
For the shortcoming of prior art, the object of the present invention is to provide a kind of device and method that the ultrasound examination speaker net of speaker net carrying material defective products is bad that can accurately detect.
The technical solution adopted for the present invention to solve the technical problems is: provide the device that a kind of ultrasound examination speaker net is bad, it is characterized in that: comprise frame and be loaded on the blowing module in frame successively, draw material module and rewinding module, ultrasound examination support is had drawing the middle part of material module, described ultrasound examination support comprise be fixed on draw material module in the middle part of bottom plate and the upper mounted plate hinged with bottom plate, the ultrasound wave transmitter module having locking knob and at least one to penetrate its plate face in upper mounted plate fixes vestibule, have in bottom plate runner and with ultrasound wave transmitter module fix vestibule quantity and position suitable and the ultrasound wave receiver module penetrating its plate face fixes vestibule, described ultrasound wave transmitter module is fixed in vestibule and is placed with ultrasound wave transmitter module, described ultrasound wave receiver module is fixed in vestibule and is placed with ultrasound wave receiver module, described runner runs through bottom plate and fixes vestibule and ultrasound wave receiver module is fixed between vestibule at ultrasound wave transmitter module.
It can be 4 that described ultrasound wave transmitter module fixes vestibule, and correspondingly described ultrasound wave receiver module is fixed vestibule and is also 4.
Described ultrasound wave transmitter module fixes vestibule and described ultrasound wave receiver module, and to fix vestibule can be the circular vestibule of concentric.
Described driving draws the drive motor of material module can be servomotor.
Fixed plate can 0 °-180 ° rotate freely, during work, upper mounted plate and bottom plate are locked by locking knob.
Described ultrasound wave transmitter module and ultrasound wave are launched driving circuit and are formed ultrasonic transmit circuit, described ultrasound wave receiver module and ultrasound wave receive driving circuit and form ultrasound wave receiving circuit, the ultrasonic signal received is converted into electric signal and delivers to data acquisition module by this ultrasound wave reception driving circuit, the electric signal of input is sampled and is delivered to analysis module by data acquisition module, analysis module carries out analysis to electric signal and judges, judged result is delivered to motion controller, controls the running of drawing material module and rewinding module by motion controller.
Described ultrasonic transmit circuit, ultrasound wave receiving circuit, data acquisition module and analysis module form ultrasonic detection device jointly.
During work: speaker net band coiled material is put in blowing module, open upper mounted plate, make speaker net band coiled material from the pull-out of blowing module and pass in runner, connect with rewinding module, upper mounted plate and bottom plate are locked by turn locking knob, start and draw material module, make loudspeaker guipure uniform translation in runner, make ultrasound wave transmitter module and ultrasound wave receiver module enter duty, the bad detection of speaker net can be carried out.
Further, the invention provides a kind of method that ultrasound examination speaker net is bad, it is characterized in that comprising the steps:
One, start, loudspeaker guipure to be detected is moved with constant speed in ultrasonic detection device;
Two, sample, ultrasonic detection device detects speaker net band, quick sampling 100 times, and sampled result is put in array adData [i], wherein i ∈ (0,99), and adData [i] represents i-th sampled result;
Three, filter, to adData [i] according to size sequence, remove 10 maximal values and 10 minimum value, remaining data are averaged, result is put in tmpData, is expressed as the result when previous sampling;
Four, level and smooth, move one by after SumData [i] (i ∈ (0,18)) all data sequence, tmpData is assigned to SumData [0], calculate SumData [i] (i ∈ (0,19)) mean value, give Relult by result;
Five, secondary is level and smooth, moves one by after RltData [i] (i ∈ (0,29)) all data sequence, Result is assigned to RltData [0], calculating RltData [i] (mean value of i ∈ (0,30), and as measurement result;
Six, compare, if the measurement result of the 5th step is greater than threshold value, illustrating does not have bad, and programming jump performs to the 9th step, otherwise illustrated bad, programming jump is to the 7th step;
Seven, stop, stopping drawing material;
Eight, detect, detect start button and whether again pressed, do not detect that start button is pressed, re-execute the 8th step, if fruit detects that start button is pressed, perform the 9th step;
Nine, judge, detect whether receive END instruction, if receive END instruction, system exits, otherwise, re-execute the first step.
The invention has the beneficial effects as follows: device and method is simple, accurately can detect speaker net carrying material defective products.
[accompanying drawing explanation]
Below in conjunction with accompanying drawing, the invention will be further described.
Fig. 1 is the physical construction schematic diagram of apparatus of the present invention.
Fig. 2 is the detail of construction of ultrasound examination support in the present invention.
Fig. 3 is ultrasound examination hardware system figure in the present invention.
Fig. 4 is the signal processing flow figure of the inventive method.
In Fig. 1: 20 for blowing module, 21 for loudspeaker guipure, 22 for frame, 23 for ultrasound examination support, 24 for rewinding module, 25 for drawing material module.
In the ultrasound examination support 23 of Fig. 2: 230 be bottom plate, 231 be runner, 232 be locking knob, 233 be upper mounted plate, 234 to fix vestibule, 235 for ultrasound wave transmitter module be that jointed shaft, 236 fixes vestibule for ultrasound wave receiver module.
In the ultrasound examination hardware system figure of Fig. 3: 100 for ultrasound wave launch driving circuit, 101 be ultrasound wave transmitter module, 102 for ultrasound wave receiver module, 103 for ultrasound wave receive driving circuit, 105 for motion controller, 106 be signal analyse block, 107 be data acquisition module.
[embodiment]
See accompanying drawing, the bad device characteristic of a kind of ultrasound examination of the present invention speaker net is: comprise frame 22 and be loaded on the blowing module 20 in frame 22 successively, draw material module 25 and rewinding module 24, ultrasound examination support 23 is had drawing the middle part of material module 25, described ultrasound examination support 23 comprise be fixed on draw material module 25 in the middle part of bottom plate 230 and the upper mounted plate 233 hinged with bottom plate 230, the ultrasound wave transmitter module having locking knob 232 and at least one to penetrate its plate face in upper mounted plate 233 fixes vestibule 234, have in bottom plate 230 runner 231 and with ultrasound wave transmitter module fix vestibule 234 quantity and position suitable and the ultrasound wave receiver module penetrating its plate face fixes vestibule 236, described ultrasound wave transmitter module is fixed in vestibule 234 and is placed with ultrasound wave transmitter module 101, described ultrasound wave receiver module is fixed in vestibule 236 and is placed with ultrasound wave receiver module 102, described runner 231 runs through bottom plate 230 and fixes vestibule 234 and ultrasound wave receiver module is fixed between vestibule 236 at ultrasound wave transmitter module.
In an embodiment of the present invention:
It is 4 that described ultrasound wave transmitter module fixes vestibule 234, and correspondingly described ultrasound wave receiver module is fixed vestibule 236 and is also 4.
Described ultrasound wave transmitter module is fixed vestibule 234 and is fixed vestibule 236 for the circular vestibule of concentric with described ultrasound wave receiver module.
Described driving draws the drive motor of material module 25 to be servomotor.
Fixed plate 233 can 0 °-180 ° rotate freely, during work, upper mounted plate 233 and bottom plate 230 are locked by locking knob 232.
Described ultrasound wave transmitter module 101 is launched driving circuit 100 with ultrasound wave and is formed ultrasonic transmit circuit, described ultrasound wave receiver module 102 receives driving circuit 103 with ultrasound wave and forms ultrasound wave receiving circuit, the ultrasonic signal received is converted into electric signal and delivers to data acquisition module 107 by this ultrasound wave reception driving circuit 103, the electric signal of input is sampled and is delivered to analysis module 106 by data acquisition module 107, analysis module 106 pairs of electric signal carry out analysis and judge, judged result is delivered to motion controller 105, the running of drawing material module 25 and rewinding module 24 is controlled by motion controller 105.
Described ultrasonic transmit circuit, ultrasound wave receiving circuit, data acquisition module 107 and analysis module 106 form ultrasonic detection device jointly.
During work: loudspeaker guipure 21 coiled material is put in blowing module 20, open upper mounted plate 233, loudspeaker guipure 21 coiled material is made to pull out from blowing module 20 and pass in runner 231, connect with rewinding module 24, upper mounted plate 233 and bottom plate 230 are locked by turn locking knob 232, start and draw material module 25, make loudspeaker guipure 21 uniform translation in runner 231, make ultrasound wave transmitter module 101 and ultrasound wave receiver module 102 enter duty, the bad detection of speaker net can be carried out.
Further, a kind of method that the present invention provides ultrasound examination speaker net bad simultaneously, is characterized in that comprising the steps:
One, start, loudspeaker guipure 21 to be detected is moved with constant speed in ultrasonic detection device;
Two, sample, ultrasonic detection device detects loudspeaker guipure 21, quick sampling 100 times, and sampled result is put in array adData [i], wherein, i ∈ (0,99), adData [i] represents i-th sampled result;
Three, filter, to adData [i] according to size sequence, remove 10 maximal values and 10 minimum value, remaining data are averaged, result is put in tmpData, is expressed as the result when previous sampling;
Four, level and smooth, move one by after SumData [i] (i ∈ (0,18)) all data sequence, tmpData is assigned to SumData [0], calculate SumData [i] (i ∈ (0,19)) mean value, give Relult by result;
Five, secondary is level and smooth, moves one by after RltData [i] (i ∈ (0,29)) all data sequence, Result is assigned to RltData [0], calculating RltData [i] (mean value of i ∈ (0,30), and as measurement result;
Six, compare, if the measurement result of the 5th step is greater than threshold value, illustrating does not have bad, and programming jump performs to the 9th step, otherwise illustrated bad, programming jump is to the 7th step;
Seven, stop, stopping drawing material;
Eight, detect, detect start button and whether again pressed, do not detect that start button is pressed, re-execute the 8th step, if fruit detects that start button is pressed, perform the 9th step;
Nine, judge, detect whether receive END instruction, if receive END instruction, system exits, otherwise, re-execute the first step.
Signal analyse block 106 uses aforementioned ultrasonic to detect the bad method of speaker net, differentiate whether loudspeaker guipure 21 has bad appearance according to the relative intensity size of current demand signal, if loudspeaker guipure 21 does not have bad situation to occur, then ultrasonic signal is very little through the decay after loudspeaker guipure 21; If when detected loudspeaker guipure 21 is bad, signal is sent in the process of described ultrasound wave receiver module 102 via described ultrasound wave transmitter module 101, significantly will decay through the bad film barrier of described one deck.Therefore the power change of signal is just become after treatment with or without the generation of plug-hole.
Consider that the gap between coiled material product is generally the obvious decay that gas impermeable material also can cause ultrasonic signal, situation about integrating is exactly: when at the uniform velocity drawing material, if there is no the generation of plug-hole, the signal received, after treatment with regard to similar AC signal, shows as Wave crest and wave trough alternately change in order.If there is bad, signal just shows as one-period or only has trough in multiple cycle and do not have crest.Feature accordingly, can judge whether that defective products occurs.
Claims (5)
1. the device that a ultrasound examination speaker net is bad, it is characterized in that: comprise frame (22) and be loaded on the blowing module (20) in frame (22) successively, draw material module (25) and rewinding module (24), ultrasound examination support (23) is had drawing the middle part of material module (25), described ultrasound examination support (23) comprises the bottom plate (230) and the upper mounted plate (233) hinged with bottom plate (230) that are fixed on and draw material module (25) middle part, locking knob (232) and ultrasound wave transmitter module that at least one penetrates its plate face is had to fix vestibule (234) in upper mounted plate (233), have in bottom plate (230) runner (231) and with ultrasound wave transmitter module fix vestibule (234) quantity and position suitable and the ultrasound wave receiver module penetrating its plate face fixes vestibule (236), described ultrasound wave transmitter module is fixed in vestibule (234) and is placed with ultrasound wave transmitter module (101), described ultrasound wave receiver module is fixed in vestibule (236) and is placed with ultrasound wave receiver module (102), described runner (231) runs through bottom plate (230) and is positioned at ultrasound wave transmitter module fixes vestibule (234) and ultrasound wave receiver module is fixed between vestibule (236), described ultrasound wave transmitter module (101) and ultrasound wave are launched driving circuit (100) and are formed ultrasonic transmit circuit, described ultrasound wave receiver module (102) and ultrasound wave receive driving circuit (103) and form ultrasound wave receiving circuit, the ultrasonic signal received is converted into electric signal and delivers to data acquisition module (107) by this ultrasound wave reception driving circuit (103), the electric signal of input is sampled and is delivered to analysis module (106) by data acquisition module (107), analysis module (106) amplifies electric signal, filter, smoothing processing, and carry out analysis judgement, judged result is delivered to motion controller (105), the running of drawing material module (25) and rewinding module (24) is controlled by motion controller (105).
2. the device that ultrasound examination speaker net according to claim 1 is bad, it is characterized in that: it is 4 that described ultrasound wave transmitter module fixes vestibule (234), correspondingly described ultrasound wave receiver module is fixed vestibule (236) and is also 4.
3. the device that ultrasound examination speaker net according to claim 2 is bad, is characterized in that: described ultrasound wave transmitter module is fixed vestibule (234) and fixed vestibule (236) for the circular vestibule of concentric with described ultrasound wave receiver module.
4. the device that ultrasound examination speaker net according to claim 1 is bad, is characterized in that: described in draw material module (25) drive motor be servomotor.
5. the method that a ultrasound examination speaker net is bad, the device that the method uses the ultrasound examination speaker net described in claim 1 bad, speaker net band coiled material pulls out from the blowing module (20) at described device and passes from runner (231), it is characterized in that comprising the steps:
One, start, loudspeaker guipure (21) to be detected is moved with constant speed in ultrasonic detection device;
Two, sample, ultrasonic detection device detects loudspeaker guipure (21), quick sampling 100 times, and sampled result is put in array adData [i], wherein, i ∈ (0,99), adData [i] represents i-th sampled result;
Three, filter, to adData [i] according to size sequence, remove 10 maximal values and 10 minimum value, remaining data are averaged, result is put in tmpData, is expressed as the result when previous sampling;
Four, level and smooth, move one by after SumData [i] (i ∈ (0,18)) all data sequence, tmpData is assigned to SumData [0], calculate SumData [i] (i ∈ (0,19)) mean value, give Relult by result;
Five, secondary is level and smooth, moves one by after RltData [i] (i ∈ (0,29)) all data sequence, Result is assigned to RltData [0], calculating RltData [i] (mean value of i ∈ (0,30), and as measurement result;
Six, compare, if the measurement result of the 5th step is greater than threshold value, illustrating does not have bad, and programming jump performs to the 9th step, otherwise illustrated bad, programming jump is to the 7th step;
Seven, stop, stopping drawing material;
Eight, detect, detect start button and whether again pressed, do not detect that start button is pressed, re-execute the 8th step, if fruit detects that start button is pressed, perform the 9th step;
Nine, judge, detect whether receive END instruction, if receive END instruction, system exits, otherwise, re-execute the first step.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310284814.8A CN103454347B (en) | 2013-07-02 | 2013-07-02 | The device and method that ultrasound examination speaker net is bad |
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| CN201310284814.8A CN103454347B (en) | 2013-07-02 | 2013-07-02 | The device and method that ultrasound examination speaker net is bad |
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| CN103454347B true CN103454347B (en) | 2016-04-13 |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4160387A (en) * | 1976-12-28 | 1979-07-10 | Sumitomo Electric Industries, Ltd. | Method and apparatus for detecting internal cavities in casting bars |
| EP1008849A2 (en) * | 1998-12-09 | 2000-06-14 | Kawasaki Steel Corporation | Method and apparatus for detecting flaws in strip |
| DE20114959U1 (en) * | 2001-09-11 | 2002-05-16 | Volk & Nadenau GmbH, 44149 Dortmund | Handle bar check for plastic bottle crates |
| DE10357596B3 (en) * | 2003-12-08 | 2005-03-03 | Renate Brand | Process for disturbance free ultrasonic testing of rotationally symmetrical components generally useful in applications involving such components |
| CN201096756Y (en) * | 2007-10-19 | 2008-08-06 | 江苏常宝钢管有限公司 | Steel pipe ultrasonic damage detection feeding device |
| CN202177603U (en) * | 2011-08-10 | 2012-03-28 | 浙江科宇金属材料有限公司 | Flaw detector for irregularly-shaped bars |
| CN102854243A (en) * | 2012-03-21 | 2013-01-02 | 江苏三合声源超声波科技有限公司 | Automatic ultrasonic flaw detection device |
| CN203443922U (en) * | 2013-07-02 | 2014-02-19 | 深圳市领略数控设备有限公司 | Ultrasonic detecting device for defects of horn net |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60205355A (en) * | 1984-03-30 | 1985-10-16 | Sumitomo Metal Ind Ltd | Flaw detecting method of wire rod |
| JPH0746094B2 (en) * | 1987-02-03 | 1995-05-17 | 大同特殊鋼株式会社 | Wire inspection method |
| JPH0599902A (en) * | 1991-10-07 | 1993-04-23 | Hitachi Metals Ltd | Apparatus for inspecting rectangular steel material |
| JP3722075B2 (en) * | 2002-03-11 | 2005-11-30 | Ｊｆｅスチール株式会社 | Method for detecting misalignment of ultrasonic line sensor |
-
2013
- 2013-07-02 CN CN201310284814.8A patent/CN103454347B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4160387A (en) * | 1976-12-28 | 1979-07-10 | Sumitomo Electric Industries, Ltd. | Method and apparatus for detecting internal cavities in casting bars |
| EP1008849A2 (en) * | 1998-12-09 | 2000-06-14 | Kawasaki Steel Corporation | Method and apparatus for detecting flaws in strip |
| DE20114959U1 (en) * | 2001-09-11 | 2002-05-16 | Volk & Nadenau GmbH, 44149 Dortmund | Handle bar check for plastic bottle crates |
| DE10357596B3 (en) * | 2003-12-08 | 2005-03-03 | Renate Brand | Process for disturbance free ultrasonic testing of rotationally symmetrical components generally useful in applications involving such components |
| CN201096756Y (en) * | 2007-10-19 | 2008-08-06 | 江苏常宝钢管有限公司 | Steel pipe ultrasonic damage detection feeding device |
| CN202177603U (en) * | 2011-08-10 | 2012-03-28 | 浙江科宇金属材料有限公司 | Flaw detector for irregularly-shaped bars |
| CN102854243A (en) * | 2012-03-21 | 2013-01-02 | 江苏三合声源超声波科技有限公司 | Automatic ultrasonic flaw detection device |
| CN203443922U (en) * | 2013-07-02 | 2014-02-19 | 深圳市领略数控设备有限公司 | Ultrasonic detecting device for defects of horn net |
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Effective date of registration: 20170511 Address after: 450000 Zhengzhou airport, Xingang, Hong Kong Road and Renmin Road intersection intelligent terminal mobile phone industrial park, building 18, building 19, No. Patentee after: Zhengzhou Ling Sheng Technology Co. Ltd. Address before: Bantian street, Longgang District of Shenzhen City, Guangdong province 518000 five and 5022 Avenue when ya lien of industrial plant building 3 floor A District Patentee before: Shenzhen Linglvo Numerical Control Equipment Co., Ltd. |