CN103686543A - Adaptive noise filtration aerial photography device - Google Patents
Adaptive noise filtration aerial photography device Download PDFInfo
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- CN103686543A CN103686543A CN201310660409.1A CN201310660409A CN103686543A CN 103686543 A CN103686543 A CN 103686543A CN 201310660409 A CN201310660409 A CN 201310660409A CN 103686543 A CN103686543 A CN 103686543A
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Abstract
The invention provides an adaptive noise filtration aerial photography device. The adaptive noise filtration aerial photography device comprises an aerial photography device body, wherein a camera and a microphone are arranged in the aerial photography device body, audio from the microphone passes through an adjustable filter and then is input into a recording circuit, the adjustable filter is a band-pass filter, a feedback module used for detecting the rotational frequency of a spiral wing is further arranged in the aerial photography device body, the feedback module adjusts a pass band of the adjustable filter according to the rotational frequency of the spiral wing, the center frequency of the pass band can be equal to the rotational frequency of the spiral wing, the adjustable filter filters away audio, in the pass band, of the audio sent by the microphone, and the rest of the audio is transmitted to the recording circuit. The adaptive noise filtration aerial photography device can directly shoot the ground scene in the air, noise of the spiral wing is eliminated at the same time, and the sound effect of the scene is improved.
Description
Technical field
The present invention relates to electronic device field, especially, relate to a kind of for taking the device of taking photo by plane of ground scene.
Background technology
At present, take various scenes, during as scenes such as party, ceremonies, in order to show grand scene, usually adopting the means of getting a bird's eye view shooting, therefore need to use the device of taking photo by plane; And the current device of taking photo by plane generally adopts the mode of direct production to take low latitude scene, in the video of its picked-up, conventionally carry the Rotation Noise of screw wing secretly, this makes video audio very poor; Another means is to adopt the special sound pick-up outfit separated with the device of taking photo by plane, and directly at ground admission scene sound, and the audio frequency in the video of the device picked-up of taking photo by plane is abandoned, and the audio frequency of ground admission is imported in video, is integrated into new video; For this kind of method, it makes comparatively trouble, in common shooting, conventionally because photographer wants to take the trouble, does not abandon.
Summary of the invention
For the problems referred to above, the object of the present invention is to provide a kind of adaptability to filter the device of taking photo by plane of making an uproar, this aerial device can aloft directly be taken ground scene, eliminates the noise of screw wing simultaneously, improves scene audio.
The technical solution adopted for the present invention to solve the technical problems is: the make an uproar device of taking photo by plane of this adaptability filter comprises the device body of taking photo by plane, in the described device body of taking photo by plane, be provided with camera, microphone, described microphone is by input recording circuit after a tunable filter, and described tunable filter is band pass filter; In the described device body of taking photo by plane, also comprise that one for detection of the feedback module of screw wing speed, described feedback module is adjusted the passband of described tunable filter according to screw wing speed; The speed that the centre frequency that makes passband is described screw wing; Audio frequency filtering in the audio frequency that described tunable filter transmits described microphone, in passband, gives described recording circuit by remaining audio transmission.
As preferably, the passband width of described band pass filter is not more than 20Hz, as described in centre frequency be MHz, passband is the Hz of (M-10) Hz ~ (M+10).
As preferably, described feedback module comprises a punching dish being fixed in screw wing rotating shaft, and a pair of counting optocoupler of these punching dish both sides, and according to described optocoupler, the counting in the unit interval judges the speed of screw wing to feedback module.
As preferably, tunable filter is coupled to form by a low pass filter, a high pass filter, and the adjusting parts of passband are the tunable capacitor on described low pass filter, high pass filter.
Beneficial effect of the present invention is: this adaptability filter is made an uproar and taken photo by plane device when operation, first microphone together enrolls into mixed audio by the Rotation Noise of scene sound and screw wing, this mixed audio is transferred to after described tunable filter, the Rotation Noise of the characteristic frequency being produced by screw wing rotation will be by filtering, and only remaining scene sound is transmitted to recording circuit; At the device of taking photo by plane, adjust in real time in the process of shooting angle, screw wing speed real-time change, effect due to feedback module, make the filtering characteristic of described tunable filter adapt in real time the variation of screw wing, thus ensured finally enter described recording circuit only have scene sound; As can be seen here, the make an uproar device of taking photo by plane of this adaptability filter can effectively improve scene audio.
Accompanying drawing explanation
fig. 1 is this adaptability filter electrical structure schematic diagram of device of taking photo by plane of making an uproar.
Embodiment
Below in conjunction with drawings and Examples, the present invention is further described:
In the embodiment shown in fig. 1, the make an uproar device of taking photo by plane of this adaptability filter comprises the device body (not shown) of taking photo by plane, in the described device body of taking photo by plane, be provided with camera (not shown), microphone 1, described microphone 1 is by a rear input recording circuit 5 of tunable filter 2, described tunable filter 5 is band pass filter, its passband width is not more than 20Hz, as the centre frequency of establishing passband is MHz, and passband is the Hz of (M-10) Hz ~ (M+10);
In the described device body of taking photo by plane, also comprise that one for detection of the feedback module 3 of screw wing 4 speeds, described feedback module 3 is adjusted the passband of described tunable filter 2 according to screw wing 4 speeds; The centre frequency that makes passband is the speed of described screw wing 4; Audio frequency filtering in the audio frequency that described tunable filter 2 transmits described microphone 1, in passband, gives described recording circuit 5 by remaining audio transmission; In described recording circuit 5, mainly comprise amplifying circuit, memory module.
For described feedback module, it can adopt following structure: comprise a punching dish being fixed in screw wing 4 rotating shafts, and a pair of counting optocoupler of these punching dish both sides, the counting of the described optocoupler of feedback module foundation in the unit interval judges the speed of screw wing.
Described tunable filter is coupled to form by a low pass filter, a high pass filter, and the adjusting parts of passband are the tunable capacitor on described low pass filter, high pass filter.
Above-mentioned adaptability filter is made an uproar and is taken photo by plane device when operation, first microphone 1 together enrolls into mixed audio by the Rotation Noise of scene sound and screw wing 4, this mixed audio is transferred to after described tunable filter 2, the Rotation Noise of the characteristic frequency being produced by screw wing 4 rotations will be by filtering, and only remaining scene sound is transmitted to recording circuit 5; At the device of taking photo by plane, adjust in real time in the process of shooting angle, screw wing speed real-time change, effect due to feedback module 3, make the filtering characteristic of described tunable filter 2 adapt in real time the variation of screw wing 4, thus ensured finally enter described recording circuit 5 only have scene sound; As can be seen here, the make an uproar device of taking photo by plane of this adaptability filter can effectively improve scene audio.
The foregoing is only preferred embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (4)
1. the adaptability filter device of taking photo by plane of making an uproar, comprises the device body of taking photo by plane, described in take photo by plane in device body and be provided with camera, microphone, it is characterized in that: described microphone is by input recording circuit after a tunable filter, and described tunable filter is band pass filter; In the described device body of taking photo by plane, also comprise that one for detection of the feedback module of screw wing speed, described feedback module is adjusted the passband of described tunable filter according to screw wing speed; The speed that the centre frequency that makes passband is described screw wing; Audio frequency filtering in the audio frequency that described tunable filter transmits described microphone, in passband, gives described recording circuit by remaining audio transmission.
2. adaptability according to claim 1 is filtered the device of taking photo by plane of making an uproar, and it is characterized in that: the passband width of described band pass filter is not more than 20Hz.
3. adaptability according to claim 1 is filtered the device of taking photo by plane of making an uproar, it is characterized in that: described feedback module comprises a punching dish being fixed in screw wing rotating shaft, and a pair of counting optocoupler of these punching dish both sides, the counting of the described optocoupler of feedback module foundation in the unit interval judges the speed of screw wing.
4. adaptability according to claim 1 and 2 is filtered the device of taking photo by plane of making an uproar, it is characterized in that: described tunable filter is coupled to form by a low pass filter, a high pass filter, and the adjusting parts of passband are the tunable capacitor on described low pass filter, high pass filter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310660409.1A CN103686543A (en) | 2013-12-10 | 2013-12-10 | Adaptive noise filtration aerial photography device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310660409.1A CN103686543A (en) | 2013-12-10 | 2013-12-10 | Adaptive noise filtration aerial photography device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103686543A true CN103686543A (en) | 2014-03-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310660409.1A Pending CN103686543A (en) | 2013-12-10 | 2013-12-10 | Adaptive noise filtration aerial photography device |
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| CN (1) | CN103686543A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105228054A (en) * | 2015-10-15 | 2016-01-06 | 深圳市大疆创新科技有限公司 | Flight instruments, filming apparatus and recording denoising device thereof and method |
| CN110022449A (en) * | 2019-03-01 | 2019-07-16 | 苏州臻迪智能科技有限公司 | A kind of audio and video synthetic method, device, electronic equipment and storage medium |
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| CN1167845A (en) * | 1997-04-15 | 1997-12-17 | 佰龙机械厂股份有限公司 | Computerized jacquard location device for circular knitting machine |
| CN102098065A (en) * | 2009-12-11 | 2011-06-15 | 无锡华润矽科微电子有限公司 | Band-pass filter receiving device and control method thereof |
| CN102298926A (en) * | 2011-07-06 | 2011-12-28 | 吉林大学 | Multimedia active silencing apparatus of smoke ventilator |
| CN102722181A (en) * | 2012-07-08 | 2012-10-10 | 李良杰 | Suspended aerial photography device |
| EP2518414A1 (en) * | 2009-12-25 | 2012-10-31 | Mitsubishi Electric Corporation | Air conditioner |
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2013
- 2013-12-10 CN CN201310660409.1A patent/CN103686543A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1167845A (en) * | 1997-04-15 | 1997-12-17 | 佰龙机械厂股份有限公司 | Computerized jacquard location device for circular knitting machine |
| CN102098065A (en) * | 2009-12-11 | 2011-06-15 | 无锡华润矽科微电子有限公司 | Band-pass filter receiving device and control method thereof |
| EP2518414A1 (en) * | 2009-12-25 | 2012-10-31 | Mitsubishi Electric Corporation | Air conditioner |
| CN102298926A (en) * | 2011-07-06 | 2011-12-28 | 吉林大学 | Multimedia active silencing apparatus of smoke ventilator |
| CN102722181A (en) * | 2012-07-08 | 2012-10-10 | 李良杰 | Suspended aerial photography device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105228054A (en) * | 2015-10-15 | 2016-01-06 | 深圳市大疆创新科技有限公司 | Flight instruments, filming apparatus and recording denoising device thereof and method |
| CN105228054B (en) * | 2015-10-15 | 2019-07-05 | 深圳市大疆灵眸科技有限公司 | Flight instruments, filming apparatus and its recording denoising device and method |
| CN110022449A (en) * | 2019-03-01 | 2019-07-16 | 苏州臻迪智能科技有限公司 | A kind of audio and video synthetic method, device, electronic equipment and storage medium |
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Application publication date: 20140326 |