CN109374746A - A kind of device and method of ultrasound examination welding quality - Google Patents
A kind of device and method of ultrasound examination welding quality Download PDFInfo
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- CN109374746A CN109374746A CN201811264820.6A CN201811264820A CN109374746A CN 109374746 A CN109374746 A CN 109374746A CN 201811264820 A CN201811264820 A CN 201811264820A CN 109374746 A CN109374746 A CN 109374746A
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- signal
- ultrasonic
- air coupling
- coupling probe
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/04—Analysing solids
- G01N29/11—Analysing solids by measuring attenuation of acoustic waves
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/01—Indexing codes associated with the measuring variable
- G01N2291/015—Attenuation, scattering
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/02—Indexing codes associated with the analysed material
- G01N2291/028—Material parameters
- G01N2291/0289—Internal structure, e.g. defects, grain size, texture
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/10—Number of transducers
- G01N2291/102—Number of transducers one emitter, one receiver
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/26—Scanned objects
- G01N2291/267—Welds
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- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
The invention belongs to detection technique fields, more particularly to a kind of device and method of ultrasound examination welding quality, device includes that successively the ultrasonic transmitter of signal connection, the first Air Coupling probe, the second Air Coupling probe, amplifier, ultrasonic receiver, ultrasonic transmitter emit superpower burst signal；Burst signal is converted into ultrasonic signal and is emitted in air by the first Air Coupling probe；After ultrasonic signal penetrates object to be detected, signal decaying, Weak Ultrasonic wave signal is popped one's head in by the second Air Coupling and is received；The Weak Ultrasonic wave signal received is converted to pulse electrical signal by the second Air Coupling probe；Amplifier pulse electrical signal carries out amplification amplification；Electric signal amplified in step 5 is converted into digital signal by ultrasonic receiver, and computer judges whether the welding position of detection object welds qualification according to digital signal.Detection method of the invention need not be contacted with detection object, will not generate damage, accuracy rate is high, applied widely.
Description
Technical field
The invention belongs to detection technique fields, and in particular to a kind of device and method of ultrasound examination welding quality.
Background technique
The traditional negative pole lug welding of lithium ion battery industry is using Ohmic contact electric discharge welding manner, due to resistance welding side
Formula has the shortcomings that weld strength is unstable, and detection method can only detect pulling force using mechanical pull.Mechanical pull detection belongs to
Contact-type destructive test method, can not only destroy the intensity of welding position, and detection accuracy is also unreliable, stay to battery product
Lower security risk.Although another vision-based detection is non-contact non-destructive testing, but False Rate is very high, and being easy will be defective
Battery product；Process after inflow.Lithium battery welding position urgent need wants a kind of non-contact nondestructive detecting method, and requires to detect
As a result harsher to testing requirements close to the power lithium-ion battery of 100%, especially automobile.
Summary of the invention
To solve the above problems, the object of the present invention is to provide a kind of ultrasound examination welding qualities of Non-contact nondestructive
Device and method.
The technical solution of the present invention is as follows: providing a kind of device of ultrasound examination welding quality, including successively signal connects
Ultrasonic transmitter, the first Air Coupling probe, the second Air Coupling probe, amplifier, ultrasonic receiver.
Another technical solution of the invention are as follows: a kind of method of ultrasound examination welding quality is provided, comprising the following steps:
Step 1: ultrasonic transmitter emits superpower burst signal；
Step 2: burst signal is converted into ultrasonic signal and is emitted in air by the first Air Coupling probe；
Step 3: after ultrasonic signal penetrates object to be detected, signal decaying, remaining Weak Ultrasonic wave signal is by the second sky
Gas coupling probe receives；
Step 4: the Weak Ultrasonic wave signal received is converted to pulse electrical signal by the second Air Coupling probe；
Step 5: the pulse electrical signal of the second Air Coupling probe conversion is carried out amplification amplification by amplifier；
Step 6: electric signal amplified in step 5 is converted into digital signal by ultrasonic receiver, computer according to
Digital signal judges whether the welding position of detection object welds qualification.
Preferably, in the step 2 the first Air Coupling probe transmitting burst signal frequency range be 30KHz~
5MHz。
Preferably, in the step 5 amplifier by voltage signal amplification factor be 1000 times.
The invention has the benefit that the present invention mainly utilizes in high-sensitivity ultrasonic device detection lithium ion battery
Laser welding position between portion's negative electrode lug and shell wall penetrates the ultrasonic signal strength of welding position, ultrasonic wave by collecting
By defect part (such as burn-through, welding penetration not enough, have welding slag bubble, desoldering etc.) different feedback signals can be generated；It calculates
Machine judges automatically whether laser welding position meets welding requirements according to the signal difference that ultrasonic scanning is fed back.Inspection of the invention
Survey method and existing visual pattern recognition detection and mechanical tensile forces detection weld strength are different, and lossless online inspection may be implemented
Laser welding position defect is surveyed, and accuracy rate is close to 100%.Detection method can be not only used for lithium battery laser welding
Location detection, it can also be used to which lithium battery interior Moisture high UCL causes the detection of air-blowing, is equally applicable for the welding of other solids, coating
It is connect etc. the defects detection of a variety of industries, such as brazing, surface covering detection etc..
Detailed description of the invention
Fig. 1 is the schematic device of ultrasound examination welding quality of the present invention.
Fig. 2 is the method flow diagram of ultrasound examination welding quality of the present invention.
Specific embodiment
The present invention is further detailed in conjunction with the accompanying drawings below:
Refering to Figure 1, the present invention provides a kind of devices of ultrasound examination welding quality, including successively signal connects
The ultrasonic transmitter 1 that connects, the first Air Coupling the 2, second Air Coupling of popping one's head in are popped one's head in 3, amplifier 4, ultrasonic receiver 5.
It please refers to shown in Fig. 2, the present invention provides a kind of methods of ultrasound examination welding quality, comprising the following steps:
Step 1: ultrasonic transmitter emits superpower burst signal；
Step 2: burst signal is converted into ultrasonic signal and is emitted in air by the first Air Coupling probe；
Step 3: after ultrasonic signal penetrates object to be detected, signal decaying, remaining Weak Ultrasonic wave signal is by the second sky
Gas coupling probe receives；
Step 4: the Weak Ultrasonic wave signal received is converted to pulse electrical signal by the second Air Coupling probe；
Step 5: the pulse electrical signal of the second Air Coupling probe conversion is carried out amplification amplification by amplifier；
Step 6: electric signal amplified in step 5 is converted into digital signal by ultrasonic receiver, computer according to
Digital signal judges whether the welding position of detection object welds qualification.
The burst signal strength range of the first Air Coupling probe transmitting is 30KHz~5MHz in the step 2.
Voltage signal amplification factor is 1000 times by amplifier in the step 5.
The present invention mainly utilizes between high-sensitivity ultrasonic device detection inside lithium ion cell negative electrode lug and shell wall
Laser welding position, penetrate the ultrasonic signal strength of welding position by collecting, ultrasonic wave is by defect part (as welded
It wears, welding penetration is inadequate, has welding slag bubble, desoldering etc.) different feedback signals can be generated；Computer is anti-according to ultrasonic scanning
The signal difference of feedback judges automatically whether laser welding position meets welding requirements.Detection method and existing vision of the invention
Image recognition detection and mechanical tensile forces detection weld strength are different, and lossless audio coding laser welding position may be implemented and lack
It falls into, and accuracy rate is close to 100%.Detection method can be not only used for the detection of lithium battery laser welding position, it is also possible to
Cause the detection of air-blowing in lithium battery interior Moisture high UCL, is equally applicable for lacking for a variety of industries such as other solid welding, coating
Detection is fallen into, if brazing connects, surface covering detection etc..
The foregoing is merely presently preferred embodiments of the present invention, all equivalent changes done according to scope of the invention as claimed with
Modification, should all belong to the covering scope of the claims in the present invention.
Claims (4)
1. a kind of device of ultrasound examination welding quality, which is characterized in that including successively signal connection ultrasonic transmitter,
First Air Coupling probe, the second Air Coupling probe, amplifier, ultrasonic receiver.
2. a kind of method of ultrasound examination welding quality, which comprises the following steps:
Step 1: ultrasonic transmitter emits superpower burst signal；
Step 2: burst signal is converted into ultrasonic signal and is emitted in air by the first Air Coupling probe；
Step 3: after ultrasonic signal penetrates object to be detected, signal decaying, remaining Weak Ultrasonic wave signal is by the second air coupling
Probe is closed to receive；
Step 4: the Weak Ultrasonic wave signal received is converted to pulse electrical signal by the second Air Coupling probe；
Step 5: the pulse electrical signal of the second Air Coupling probe conversion is carried out amplification amplification by amplifier；
Step 6: electric signal amplified in step 5 is converted into digital signal by ultrasonic receiver, and computer is according to number
Signal judges whether the welding position of detection object welds qualification.
3. the method for ultrasound examination welding quality according to claim 2, which is characterized in that first in the step 2
The burst signal frequency range of Air Coupling probe transmitting is 30KHz~5MHz.
4. the method for ultrasound examination welding quality according to claim 2, which is characterized in that amplification in the step 5
Voltage signal amplification factor is 1000 times by device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811264820.6A CN109374746A (en) | 2018-10-29 | 2018-10-29 | A kind of device and method of ultrasound examination welding quality |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811264820.6A CN109374746A (en) | 2018-10-29 | 2018-10-29 | A kind of device and method of ultrasound examination welding quality |
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| Publication Number | Publication Date |
|---|---|
| CN109374746A true CN109374746A (en) | 2019-02-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811264820.6A Pending CN109374746A (en) | 2018-10-29 | 2018-10-29 | A kind of device and method of ultrasound examination welding quality |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110248302A (en) * | 2019-05-29 | 2019-09-17 | 苏州佳世达电通有限公司 | Ultrasound scanner head checking system and the ultrasound scanner head method of inspection |
| CN114152669A (en) * | 2021-11-12 | 2022-03-08 | 中车长江运输设备集团有限公司 | Probe and method for detecting bubble defects of composite sandwich plate |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104865317A (en) * | 2015-04-23 | 2015-08-26 | 同济大学 | Transmission type air coupling ultrasonic scanning imaging method |
| CN107102065A (en) * | 2017-05-05 | 2017-08-29 | 常俊杰 | The ultrasonic wave detecting system of one kind of multiple coupled modes |
-
2018
- 2018-10-29 CN CN201811264820.6A patent/CN109374746A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104865317A (en) * | 2015-04-23 | 2015-08-26 | 同济大学 | Transmission type air coupling ultrasonic scanning imaging method |
| CN107102065A (en) * | 2017-05-05 | 2017-08-29 | 常俊杰 | The ultrasonic wave detecting system of one kind of multiple coupled modes |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110248302A (en) * | 2019-05-29 | 2019-09-17 | 苏州佳世达电通有限公司 | Ultrasound scanner head checking system and the ultrasound scanner head method of inspection |
| CN110248302B (en) * | 2019-05-29 | 2021-06-08 | 苏州佳世达电通有限公司 | Ultrasonic probe inspection system and ultrasonic probe inspection method |
| CN114152669A (en) * | 2021-11-12 | 2022-03-08 | 中车长江运输设备集团有限公司 | Probe and method for detecting bubble defects of composite sandwich plate |
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Application publication date: 20190222 |