CN108848439B - Sound film detection device - Google Patents
Sound film detection device Download PDFInfo
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- CN108848439B CN108848439B CN201810787902.2A CN201810787902A CN108848439B CN 108848439 B CN108848439 B CN 108848439B CN 201810787902 A CN201810787902 A CN 201810787902A CN 108848439 B CN108848439 B CN 108848439B
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- sound
- laser
- tray
- box
- picture
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R29/00—Monitoring arrangements; Testing arrangements
- H04R29/001—Monitoring arrangements; Testing arrangements for loudspeakers
Abstract
The invention discloses a sound film detection device, which comprises: an operating platform; the tray frame is arranged on the operation platform, and a jig tray for placing the sound film is arranged on the tray frame; the 3D laser shooting box is arranged on the operation platform, the 3D laser shooting box is positioned above the jig tray, and a 3D camera is arranged in the 3D laser shooting box; the 2D photographing assembly is arranged on the operation platform and located below the jig tray, and the 2D photographing assembly comprises a dome light source and a camera located below the dome light source. The invention can detect the concentricity and depth of the sound membrane, and has high efficiency and good precision.
Description
Technical Field
The invention belongs to the technical field of detection equipment, and particularly relates to a detection device for detecting concentricity and depth of a sound membrane.
Background
The sound membrane is an integral part of the loudspeaker vibration system and is an important component for realizing electroacoustic conversion. Before the sound membrane is assembled into the finished loudspeaker, concentricity and depth of the sound membrane are required to be detected so as to ensure the quality of the product. The bottom of the diaphragm has a smooth concave surface and the distance (depth) between the bottom and top planes of the diaphragm and the concentricity between the bottom and top planes need to be monitored during the test. Most of the existing detection modes are to put the sound film into the die tooling manually, detect the sound film in a mode of human eye observation, have poor precision and low efficiency, and have subjectivity in the judgment process of manual detection, cannot guarantee the consistency of detection standards, so that the product yield is low and customer complaints are received.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a detection device for detecting concentricity and depth of a sound membrane, which can improve detection efficiency and detection precision.
The invention adopts the following technical scheme:
a sound membrane detection device comprising: an operating platform; the tray frame is arranged on the operation platform, and a jig tray for placing the sound film is arranged on the tray frame; the 3D laser shooting box is arranged on the operation platform, the 3D laser shooting box is positioned above the jig tray, and a 3D camera is arranged in the 3D laser shooting box; the 2D photographing assembly is arranged on the operation platform and located below the jig tray, and the 2D photographing assembly comprises a dome light source and a camera located below the dome light source.
Further, the 3D camera is a line laser scanning camera.
Further, a plurality of sound film placing grooves for placing sound films are formed in the jig tray, and the tray frame is movably arranged on the operation platform.
Further, be provided with a plurality of sound membrane standing grooves of placing the sound membrane on the tool tray, 3D laser take a picture box and 2D take a picture the subassembly movably set up respectively in on the operation platform, 3D laser take a picture the box and 2D take a picture the subassembly the direction of movement the same.
Further, a plurality of sound film placing grooves for placing sound films are formed in the jig tray, the tray frame can be arranged on the operation platform in a straight line reciprocating manner, the 3D laser photographing box and the 2D photographing assembly can be respectively arranged on the operation platform in a straight line reciprocating manner, the moving direction of the 3D laser photographing box is perpendicular to the moving direction of the tray frame, and the moving direction of the 2D photographing assembly is identical to the moving direction of the 3D laser photographing box.
Further, the working distance between the 3D laser photographing box and the sound membrane is adjustable.
Further, the working distance between the camera and the sound membrane in the 2D photographing assembly is adjustable.
Further, the distance between the dome light source and the sound membrane in the 2D photographing assembly is adjustable.
Compared with the prior art, the invention has the beneficial effects that: according to the sound film detection device, the 3D laser shooting box is arranged above the jig tray, the 2D shooting assembly is arranged below the jig tray, the outline of the sound film is scanned by using the laser camera in the 3D laser shooting box, the characteristic points of the sound film are detected, so that a stable image with prominent characteristics is obtained, the depth of the sound film is monitored, meanwhile, the 2D shooting assembly positioned below the jig tray is combined to obtain concentricity pictures of two planes of the sound film, the detection of the depth and concentricity of the upper surface and the lower surface of a sound film product is easily realized, the detection result is stable and reliable, the repeatability is good, and the accuracy is high. In the preferred scheme, multi-station continuous detection can be realized, and the efficiency is greatly improved.
Drawings
FIG. 1 is a schematic diagram of an embodiment of the present invention;
FIG. 2 is a front view of FIG. 1;
FIG. 3 is a top view of FIG. 1;
fig. 4 is a side view of fig. 1.
Detailed Description
The invention will be further described with reference to the following specific embodiments.
Referring to fig. 1, 2, 3 and 4, the sound film detecting apparatus of the present embodiment includes a frame (not shown), an operation platform 1, a 3D laser photographing box 2, a 2D photographing assembly 3, a jig tray 4 and a tray frame 5.
The operation platform 1 is arranged on the frame and is a detection platform of the sound film product. The jig tray 4 is used for placing the sound film products to be detected, and the jig tray 4 is placed on a tray frame 5 arranged on the operation platform 1. The jig tray 4 of the embodiment is provided with a plurality of sound film placing grooves for placing sound films, so that the plurality of sound films on the jig tray 4 can be continuously detected, and the efficiency is improved. The tray frame 5 is movably disposed on the operation platform 1, and in this embodiment, a guide rail 1a is disposed on the operation platform 1, and the tray frame 5 is disposed on the guide rail 1a and can reciprocate along the guide rail 1a under the control of the tray frame movement control unit. The tray frame moving control unit can drive the tray frame 5 to move by adopting a conventional cylinder or a servo motor and a transmission part, the tray frame moving control unit of the embodiment adopts a combination of the servo motor and a screw rod to control the tray frame 5 to move, the servo motor 8 is arranged on the operation platform 1, an output shaft of the servo motor is connected with the screw rod 9, the screw rod 9 is parallel to the guide rail 1a, the tray frame 5 is connected with a coupler (screw nut) arranged on the screw rod 9 through a connecting piece 10, and when the servo motor 8 works, the tray frame 5 moves along the guide rail 1a through the cooperation of the screw rod 9 and the coupler.
The 3D laser shooting box 2 is arranged on the operation platform 2 through the first installation frame 6, the 3D laser shooting box 2 is located above the tray frame 5 (the jig tray 4), a 3D camera is arranged in the 3D laser shooting box 2, and the 3D camera of the embodiment adopts a Kangnai line-of-sight laser scanning camera. The jig tray 4 of this embodiment is provided with a plurality of rows and a plurality of columns of sound film placing grooves, and is located on the tray frame 5 which can move along the guide rail 1a, in order to cooperate with the number and the positions of the sound film placing grooves on the jig tray 4, automatic continuous detection products are realized, the first mounting frame 6 is provided with a first sliding rail 6a, the 3D laser shooting box 2 is arranged on the first sliding rail 6a through a first sliding frame 7, and can reciprocate along the first sliding rail 6a under the control of the laser shooting box moving control unit, the moving direction of the 3D laser shooting box 2 is perpendicular to the moving direction of the tray frame 5, namely, the guide rail 1a is perpendicular to the first sliding rail 6a, so that the 3D laser shooting box 2 can sequentially shoot and detect a plurality of products located in the same row (the same column) on the jig tray 4. The laser shooting box movement control unit of this embodiment also adopts the mode of servo motor and driving medium combination to control the movement of 3D laser shooting box 2, and servo motor 8 sets up on first mounting bracket 6, and servo motor 8's output shaft links to each other with lead screw 9, and first balladeur train 7 links to each other with the shaft coupling (not shown) that sets up on lead screw 9 through connecting piece (not shown), and when servo motor 8 during operation makes first balladeur train 7 follow first slide rail 6a through the cooperation of lead screw 9 and shaft coupling.
The 2D photographing assembly 3 is arranged on the operation platform 2 through the second mounting frame 11, the 2D photographing assembly 2 is located below the tray frame 5 (the jig tray), the 2D photographing assembly 3 comprises a camera 3-1 and a dome light source 3-2, and the camera 3-1 is located below the dome light source 3-2. In order to cooperate the number of the sound film placing grooves on the jig tray 4 and the positions thereof to realize automatic continuous detection of products, the 2D photographing assembly 3 of the embodiment is movably arranged on the second mounting frame 11, the second mounting frame 11 is provided with a plurality of second sliding rails 11a, the 2D photographing assembly 3 is arranged on the second sliding rail 11a through the second sliding frame 12, and can reciprocate along the second sliding rails 11a under the control of the 2D photographing assembly movement control unit, the movement direction of the 2D laser assembly 3 is vertical to the movement direction of the tray frame 5, namely, the guide rail 1a is vertical to the second sliding rails 11a, so that the 2D photographing assembly 3 can sequentially photograph and detect a plurality of products in the same row (the same column) on the jig tray 4. The 2D photographing assembly movement control unit of this embodiment also adopts a mode of combining a servo motor and a transmission member to control movement of the 2D photographing assembly 3, the servo motor 8 is arranged on the second mounting frame 11, an output shaft of the servo motor 8 is connected with a screw rod (not shown), the second carriage 12 is connected with a coupler (not shown) arranged on the screw rod through a connecting piece (not shown), and when the servo motor 8 works, the second carriage is moved along the second sliding rail 11a through cooperation of the screw rod and the coupler. Tow chains are arranged on the first mounting frame 6 and the second mounting frame 11 and used for placing power cables, data cables and the like of the 3D laser photographing box 2, the 2D photographing assembly and the like. The 3D camera in the 3D laser photographing box 2 and the camera in the 2D photographing assembly may be connected to an external computer through a data line, so that the detection data may be transmitted to the computer or stored in a memory, and the memory is connected to the external computer through the data line.
The detection device can detect concentricity and depth of the sound film respectively, and the detection process of the invention is further described below:
placing the sound film product to be detected in a jig tray 4, and placing the jig tray 4 on a tray frame 5 on the operation platform 2; in order to improve efficiency, the embodiment is provided with two tray frames 5 on the operation platform 2, each tray frame 5 can be used for placing one jig tray 4, and each jig tray 4 is provided with 2×4 sound film placing grooves; the 3D laser photographing box 2 and the 2D photographing assembly 3 can detect the sound film products on the two jig trays 4 group by group;
a start button 13 on the operation platform 2 is controlled (an emergency stop button 14 is also arranged on the operation platform 2), the tray frame 4 moves in place under the control of a servo motor, the 3D laser photographing box 2 also moves to a corresponding position, ray lasers are emitted, the outline of the sound film is scanned point by point, and depth data of the bottom concave surface to the top plane of the sound film are obtained; the 2D photographing component also moves to a corresponding position, and after the dome light source 3-2 is turned on, the camera 3-1 photographs the sound film so as to detect the concentricity of two circular surfaces of the sound film;
every time one sound film is detected, the 3D laser shooting box 2 moves a fixed distance along the first sliding rail 6a, and scanning shooting is carried out on the outline of the next sound film; the 2D photographing assembly 3 also moves a fixed distance along the second sliding rail 11a to photograph the next sound film, and the steps are repeated to detect the sound films on the same row (same column) on the jig tray 4;
after the detection of the sound films on the same row (same column) is completed, the tray frame 5 moves a fixed distance along the guide rail 1a, and after the 3D laser shooting box 2 and the 2D shooting assembly 3 are reset, the steps are repeated to continuously detect the sound films on the upper row and the lower row (next column) of the jig bracket 4 in sequence. The detection device not only shortens the detection time, but also improves the efficiency, and compared with a manual judgment mode, the detection device detects the depth dimension and concentricity of a product through laser 3D contour scanning data and concentricity photos, has uniform judgment standard and better consistency, and is beneficial to improving the yield of the product.
Preferably, in order to adapt to different products, the distance between the laser camera in the 3D laser photographing box and the distance between the laser camera in the 2D photographing assembly and the sound membrane of the dome light source are adjustable, a plurality of fixing holes or groove-shaped holes which are arranged at intervals along the vertical direction can be arranged on the first sliding frame 7, and the 3D laser photographing box is fixed at different height positions by fastening screws so as to adjust the working distance between the laser camera in the 3D laser photographing box and the sound membrane. Similarly, a plurality of fixing holes or slotted holes are arranged on the second carriage 12 at intervals along the vertical direction, and the 2D photographing assembly is fixed at different positions by fastening screws to adjust the working distance between the camera and the dome light source and the sound membrane. The working distances corresponding to different products can be easily switched by adjusting the heights of the 3D laser photographing box and the 2D photographing assembly, so that the device is good in universality, can be used immediately after being assembled, and does not need tedious calibration. In addition, can also adopt recess and fin complex mode to realize not high regulation installation between 3D laser shooting box and the first balladeur train, between 2D shooting subassembly and the second balladeur train, except can adopt the mode of manual installation regulation, also can adopt modes such as motor or cylinder to realize the linear continuous adjustment.
In addition, in the above embodiment, the tray frame is adopted to move along one direction, the 3D laser shooting box and the 2D shooting assembly move along the direction perpendicular to the moving direction of the tray frame, so that the detection of the sound films at different positions on the same jig bracket is realized, but the tray frame can also be adopted to move along two mutually perpendicular directions, the 3D laser shooting box and the 2D shooting assembly are fixed, or the 3D laser shooting box and the 2D shooting assembly can move along two mutually perpendicular directions, and the tray frame is fixed so that the detection of the sound films at different positions on the same jig bracket is realized.
Various other corresponding changes and modifications will occur to those skilled in the art from the foregoing description and the accompanying drawings, and all such changes and modifications are intended to be included within the scope of the present invention as defined in the appended claims.
Claims (7)
1. Sound membrane detection device, its characterized in that includes:
an operating platform;
the tray frame is arranged on the operation platform, and a jig tray for placing the sound film is arranged on the tray frame;
the 3D laser shooting box is arranged on the operation platform, the 3D laser shooting box is positioned above the jig tray, a 3D camera is arranged in the 3D laser shooting box, the 3D camera is a line laser scanning camera, and the 3D camera is used for scanning the outline of the sound film and acquiring depth data of the bottom concave surface of the sound film to the top plane;
the camera is used for photographing the sound film, and concentricity photos of the top plane and the bottom plane of the sound film are obtained.
2. The acoustic membrane detection apparatus according to claim 1, wherein: the jig tray is provided with a plurality of sound film placing grooves for placing sound films, and the tray frame is movably arranged on the operation platform.
3. The sound membrane detection apparatus according to claim 1 or 2, characterized in that: be provided with a plurality of sound membrane standing grooves of placing the sound membrane on the tool tray, 3D laser take a picture box and 2D take a picture the subassembly movably set up respectively in on the operation platform, 3D laser take a picture the box and 2D take a picture the subassembly the direction of movement the same.
4. The acoustic membrane detection apparatus according to claim 1, wherein: be provided with a plurality of sound membrane standing grooves of placing the sound membrane on the tool tray, the tray frame can follow straight reciprocating motion set up in on the operation platform, 3D laser take a picture the box and 2D take a picture the subassembly can follow straight reciprocating motion set up respectively in on the operation platform, 3D laser take a picture the box the direction of movement with the direction of movement of tray frame is mutually perpendicular, 2D take a picture the direction of movement of subassembly with 3D laser take a picture the box the direction of movement the same.
5. The sound membrane detection apparatus according to claim 1 or 2 or 4, characterized in that: the working distance between the 3D laser photographing box and the sound membrane is adjustable.
6. The sound membrane detection apparatus according to claim 1 or 2 or 4, characterized in that: the working distance between the camera and the sound membrane in the 2D photographing assembly is adjustable.
7. The sound membrane detection apparatus according to claim 1 or 2 or 4, characterized in that: the distance between the dome light source and the sound membrane in the 2D photographing assembly is adjustable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810787902.2A CN108848439B (en) | 2018-07-18 | 2018-07-18 | Sound film detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810787902.2A CN108848439B (en) | 2018-07-18 | 2018-07-18 | Sound film detection device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108848439A CN108848439A (en) | 2018-11-20 |
| CN108848439B true CN108848439B (en) | 2023-10-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810787902.2A Active CN108848439B (en) | 2018-07-18 | 2018-07-18 | Sound film detection device |
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| US7560679B1 (en) * | 2005-05-10 | 2009-07-14 | Siimpel, Inc. | 3D camera |
| CN102353349A (en) * | 2011-09-30 | 2012-02-15 | 广东工业大学 | Machine vision based micro-sound film concentricity online testing system and testing method |
| CN102519401A (en) * | 2011-12-23 | 2012-06-27 | 广东工业大学 | On-line real-time sound film concentricity detection system based on field programmable gate array (FPGA) and detection method thereof |
| CN102611981A (en) * | 2012-03-19 | 2012-07-25 | 东莞市科伟自动化设备有限公司 | Sound film detection method and detection system for implementing detection method |
| CN105527294A (en) * | 2015-12-31 | 2016-04-27 | 广东长天精密设备科技有限公司 | A backlight detecting machine |
| CN206235571U (en) * | 2016-11-30 | 2017-06-09 | 惠州汉视博自动化设备有限公司 | The two-sided visual detection equipment of workpiece |
| CN207235118U (en) * | 2017-09-30 | 2018-04-13 | 东莞涌韵音膜有限公司 | The full-automatic multinomial on-line measuring device of sound film |
| CN208540169U (en) * | 2018-07-18 | 2019-02-22 | 慧眼自动化科技（广州）有限公司 | Sound film detecting device |
-
2018
- 2018-07-18 CN CN201810787902.2A patent/CN108848439B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7560679B1 (en) * | 2005-05-10 | 2009-07-14 | Siimpel, Inc. | 3D camera |
| CN102353349A (en) * | 2011-09-30 | 2012-02-15 | 广东工业大学 | Machine vision based micro-sound film concentricity online testing system and testing method |
| CN102519401A (en) * | 2011-12-23 | 2012-06-27 | 广东工业大学 | On-line real-time sound film concentricity detection system based on field programmable gate array (FPGA) and detection method thereof |
| CN102611981A (en) * | 2012-03-19 | 2012-07-25 | 东莞市科伟自动化设备有限公司 | Sound film detection method and detection system for implementing detection method |
| CN105527294A (en) * | 2015-12-31 | 2016-04-27 | 广东长天精密设备科技有限公司 | A backlight detecting machine |
| CN206235571U (en) * | 2016-11-30 | 2017-06-09 | 惠州汉视博自动化设备有限公司 | The two-sided visual detection equipment of workpiece |
| CN207235118U (en) * | 2017-09-30 | 2018-04-13 | 东莞涌韵音膜有限公司 | The full-automatic multinomial on-line measuring device of sound film |
| CN208540169U (en) * | 2018-07-18 | 2019-02-22 | 慧眼自动化科技（广州）有限公司 | Sound film detecting device |
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| CN108848439A (en) | 2018-11-20 |
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