CN106658285A - Miniature frequency-mixing and recording isolator - Google Patents
Miniature frequency-mixing and recording isolator Download PDFInfo
- Publication number
- CN106658285A CN106658285A CN201610915955.9A CN201610915955A CN106658285A CN 106658285 A CN106658285 A CN 106658285A CN 201610915955 A CN201610915955 A CN 201610915955A CN 106658285 A CN106658285 A CN 106658285A
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- transformer
- triode
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- 230000005670 electromagnetic radiation Effects 0.000 description 4
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- 101100339482 Colletotrichum orbiculare (strain 104-T / ATCC 96160 / CBS 514.97 / LARS 414 / MAFF 240422) HOG1 gene Proteins 0.000 description 2
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Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2430/00—Signal processing covered by H04R, not provided for in its groups
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- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Selective Calling Equipment (AREA)
Abstract
The present invention provides a miniature frequency-mixing and recording isolator, which comprises a Bluetooth module, a remote control module, a power supply module, a player module, a master control module, a transistor isolation module, a transformer module and an ultrasonic module. The output end of the Bluetooth module and the output end of the remote control module are respectively connected with the input end of the master control module. The output end of the master control module is connected with the input end of the transistor isolation module. The output end of the transistor isolation module is connected with the input end of the transformer module. The output end of the transformer module is connected with the input end of the ultrasonic module. According to the invention, high-frequency signals within a certain passband range and sent out by an ultrasonic sensor are mixed with the to-be-recorded sound. After that, the signals are converted into electrical signals by a microphone. Since high-frequency signals cannot be filtered out, only high-frequency signals are broadcasted after the sound recording process of recording equipment. Therefore, the original sound can be well shielded and the shielding effect is achieved.
Description
Technical field
The present invention relates to device technical field is shielded, more particularly to a kind of small-sized mixing recording shielding device.
Background technology
In recording shielding device field, traditional recording shielding device be primarily directed to superseded tape recorder with
And recording pen, tapping device of little model etc..Sound pick-up outfit to current main flow, mobile phone, digital recording pen etc. without effect or
Person's poor effect.
Traditional recording shield technology scheme mainly uses the random pulse sequence of wide frequency ranges and is disturbed in a jumble,
High-power high-frequency signal produces electromagnetic interference to sound pick-up outfit, and the input voltage or input current for making sonic transducer front end exceedes
The threshold value of sonic transducer, be allowed to cannot normal work and reach effective obstruction of voice.The method noiselessness, but its major defect
Be only to analog recording equipment interference effect preferably, it is substantially invalid to new digital recording equipment.While high-power wireless electromagnetism
Signal can produce electromagnetic radiation, for a long time using harmful.
The content of the invention
The purpose of the present invention is intended at least solve one of described technological deficiency.
For this purpose, it is an object of the invention to propose a kind of small-sized mixing recording shielding device, solving traditional recording screen
Cover that device shield effectiveness is poor, the problem substantially invalid to new digital recording equipment.
To achieve these goals, the present invention provides a kind of small-sized mixing recording shielding device, including：It is bluetooth module, distant
Control module, power module, player module, main control module, triode isolation module, transformer module, ultrasonic wave module；
The bluetooth module, the output end of the remote control module connect respectively the input of main control module, the master control mould
The input of the output end connecting triode isolation module of block, the output end connection transformer module of the triode isolation module
Input, the output end of the transformer module connects the input of ultrasonic wave module, the power module respectively with master control
Module, triode isolation module, transformer module, the power end connection of player module.
Further, chip of the main control chip of the main control module from MSP430F149 models.
Further, the main control module includes main control chip, clock module, the power supply termination 3.3V of the main control chip
Voltage, and 3 ground capacities in parallel, its signal input part one resistance of series connection, an earth resistance in parallel and another ground connection
Electric capacity, the main control chip is connected with clock module, and crystal oscillator is provided with inside the clock module, and crystal oscillator two ends connect respectively one
Ground capacity.
Further, multiple transformers are provided with inside the transformer module, the power end of each transformer connects one
Individual pull-up resistor, the multiple ultrasonic sensors in the output end connection ultrasonic wave module of each transformer, each transformer
Input is connected with a triode in triode isolation module.
Further, the quantity of the number transformer in the transformer module and the triode in triode isolation module
It is identical, and connect one to one.
Further, the triode isolation module is made up of multiple triodes, driving chip, the grid of each triode
It is connected with the output end of driving chip, the output end of the main control chip in the input and main control module of the driving chip connects
Connect.
Further, the remote control module is connected by WIFI or bluetooth with the main control module, is communicated wirelessly.
The present invention sends a kind of high-frequency signal in free transmission range and the sound to be recorded by ultrasonic sensor
One piece is blended in, then electric signal is converted to by microphone, because high-frequency signal can not be filtered out, therefore, in the small-sized of the present invention
Mixing recording shielding device working range in so that these sound pick-up outfits after sound record, play back can only be height
Frequency signal, very well can be shielded original sound, reach shield effectiveness.The present invention is also to analog recording equipment and new
Digital recording equipment is attained by interference and shield effectiveness well, at the same time will not also produce electromagnetic radiation, it is to avoid electromagnetism
The injury of Radiation On Human body.
The present invention adopts modular design so that relatively independent between modules, can be to any of which one
Individual module is individually designed, manufactures, debugs, changes and stores, and does not affect other modules, is easy to integrated, reduces being manufactured into
This, realizes miniaturization.
The additional aspect of the present invention and advantage will be set forth in part in the description, and partly will become from the following description
Obtain substantially, or recognized by the practice of the present invention.
Description of the drawings
The above-mentioned and/or additional aspect and advantage of the present invention will become from the description with reference to accompanying drawings below to embodiment
It is substantially and easy to understand, wherein：
Fig. 1 is the structured flowchart of the present invention；
Fig. 2 is the circuit theory diagrams of the main control module of the present invention；
Fig. 3 is the circuit theory diagrams of the transformer module of the present invention；
Fig. 4 is the circuit theory diagrams of the driving chip of the triode isolation module of the present invention.
Specific embodiment
Embodiments of the invention are described below in detail, the example of the embodiment is shown in the drawings, wherein from start to finish
Same or similar label represents same or similar element or the element with same or like function.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to for explaining the present invention, and be not considered as limiting the invention.
The present invention provides a kind of small-sized mixing recording shielding device, shown in refer to the attached drawing 1, including：Bluetooth module 1, remote control
Module 2, power module 7, player module 8, main control module 3, triode isolation module 4, transformer module 5, ultrasonic wave module
6；
Bluetooth module 1, the output end of remote control module 2 connect respectively the input of main control module 3, the output of main control module 3
The input of end connecting triode isolation module 4, the input of the output end connection transformer module 5 of triode isolation module 4,
The output end of transformer module 5 connects the input of ultrasonic wave module 6, power module 7 respectively with main control module 3, triode every
Power end from module 4, transformer module 5, player module 8 connects.
Remote control module 2 is connected by WIFI or bluetooth with main control module 3, carries out radio communication, Remote ultrasonic wave mould
Block 6 sends high-frequency signal, and to being shielded by sound recording sound, its maximum remote control distance is 10-11m.
Chip of the main control chip of main control module 3 from MSP430F149 models.
As shown in Fig. 2 main control module 3 includes main control chip U3, clock module.
The power supply termination 3.3V voltages of main control chip U3, and 3 ground capacities (C9-C11) in parallel, its signal input part string
One resistance R5 of connection, an earth resistance R6 in parallel and another ground capacity C17, main control chip U3 is connected with clock module,
Crystal oscillator OSC1 is provided with inside clock module, and crystal oscillator OSC1 two ends connect respectively a ground capacity (C7 and C8).
In the software section of main control chip U3, the comparing function of the timer B in MSP430F149 chips is mainly used,
When value in Timer Register is equal with the value in comparand register, into interruption, see whether flag bit is 0；Flag bit is 0
When, drive triode to open ultrasonic wave module, while flag bit is negated；When flag bit is 1, triode is driven to close ultrasonic wave
Module, and negate flag bit；Therefore, the setting of the initial value in comparand register may decide that ultrasonic wave module 6 sends high frequency letter
Number frequency, in the value that a small range is changed at random (randomly generate) in comparand register, can make what ultrasonic wave module 6 was produced
High-frequency signal is more complicated, and multiple ultrasonic sensors that in addition each triode can be controlled in ultrasonic wave module 6 are (preferably every
Individual triode controls 3 ultrasonic sensors), multi-channel control is realized, superposition produces various high-frequency noises, further increases high frequency
The complexity of noise, so as to improve shield effectiveness.
As shown in Figures 3 and 4, multiple transformers (3 transformers are selected in Fig. 3), each change are provided with inside transformer module 5
The power end of depressor all connect a pull-up resistor (in Fig. 3, the power end of transformer T1 series connection pull-up resistor R10, transformer
The power end series connection pull-up resistor R8 of the power end series connection pull-up resistor R9 of T2, transformer T3), the output end of each transformer is equal
Multiple ultrasonic sensors in connection ultrasonic wave module 6 are (preferably, in the output end connection ultrasonic wave module of each transformer
3 ultrasonic sensors, realize that three tunnels control), the input of each transformer with triode isolation module in one three
Pole pipe connection (in Fig. 3, the input of transformer T1 and the output end of triode Q1, the input and triode of transformer T2
The output end of Q2, the input of transformer T3 and the output end of triode Q3).
Wherein, transformer is identical with the quantity of the triode in triode isolation module in transformer module 5, and one a pair
Should connect, in Fig. 3, preferably 3 transformers, 3 triodes, the scheme of 9 ultrasonic sensors.
It should be noted that the quantity of above-mentioned transformer, triode, ultrasonic sensor is not limited to above range, show
The scope that example is not meant to limit the present invention.
Additionally, triode isolation module 4 is made up of multiple triodes, driving chip, the grid of each triode with drive
The output end connection of dynamic chip, the input of driving chip is connected with the output end of the main control chip in main control module, such as Fig. 4 institutes
Show, chip of the driving chip from 74HC04 models.
The audio frequency range of the high-frequency signal produced by ultrasonic wave module 6 is 17kHz-20kHz, in not by various records
In the range of the digital filtering technique of sound device interior is filtered.
Operation principle：Start small-sized mixing recording shielding device, remote control module sends control instruction, master control to main control module
Chip is received after control instruction, controls the break-make of triode, and then control transformer module gives ultrasonic wave module energization situation,
The frequency of high-frequency signal of the ultrasonic wave module according to produced by make-and-break time control, high-frequency signal is entered with the sound to be recorded
Row mixing superposition, because high-frequency signal can not be filtered out so that the sound after recording is the sound after overlapped high-frequency signal, most
The sound to be recorded is shielded eventually, reaches shield effectiveness.
The present invention, as main control chip, is kept apart in transformer and main control chip by triode using MSP430F149
Come, and multiple ultrasonic sensors (preferably 3 transformers control the scheme of 9 ultrasonic sensors) are driven by transformer.
The invention controls the break-make of triode by main control chip, so as to control the make-and-break time of ultrasonic sensor.At present, it is various
The microphone of sound pick-up outfit all employs different digital filtering techniques, and sets certain bandwidth, makes high-frequency signal and low frequency
Signal all can not be by going, because the small-sized mixing recording shielding device of the present invention sends one kind in passband by ultrasonic sensor
In the range of high-frequency signal together with the sound mix to be recorded, then be converted to after electric signal by microphone, due to high frequency
Signal can not be filtered out, therefore, in the small-sized mixing recording shielding device of the present invention so that these sound pick-up outfits are recording sound
Afterwards, what is played back can only be high-frequency signal, very well can be shielded original sound, reach shield effectiveness.The present invention
Also interference and shield effectiveness well are attained by analog recording equipment and new digital recording equipment, at the same time will not also
Produce electromagnetic radiation, it is to avoid injury of the electromagnetic radiation to human body.The frequency of present invention control high-frequency signal and encryption are completely by soft
Part realizing, so as to be conducive to the improvement and upgrading of equipment.
Shielding of the support of the present invention to various main flow sound pick-up outfits.For different electronic products, due to digital filtering
The setting of software is different, can change software, realizes the shielding to different sound pick-up outfits, in the small-sized mixing recording of the present invention
In the working range of shielding device so that the information that sound pick-up outfit is recorded cannot recognize original voice messaging, its shield effectiveness
It is good.
The present invention adopts modular design so that relatively independent between modules, can be to any of which one
Individual module is individually designed, manufactures, debugs, changes and stores, and does not affect other modules, is easy to integrated, reduces being manufactured into
This, realizes the design of miniaturization.
Although embodiments of the invention have been shown and described above, it is to be understood that above-described embodiment is example
Property, it is impossible to limitation of the present invention is interpreted as, one of ordinary skill in the art is in the principle and objective without departing from the present invention
In the case of above-described embodiment can be changed within the scope of the invention, change, replace and modification.The scope of the present invention
Extremely it is equal to limit by claims.
Claims (7)
1. a kind of small-sized mixing recording shields device, it is characterised in that include：Bluetooth module, remote control module, power module, broadcast
Put device module, main control module, triode isolation module, transformer module, ultrasonic wave module；
The bluetooth module, the output end of the remote control module connect respectively the input of main control module, the main control module
The input of output end connecting triode isolation module, the output end connection transformer module of the triode isolation module it is defeated
Enter end, the output end of the transformer module connects the input of ultrasonic wave module, the power module respectively with main control module,
Triode isolation module, transformer module, the power end connection of player module.
2. small-sized mixing recording as claimed in claim 1 shields device, it is characterised in that：The main control chip of the main control module
From the chip of MSP430F149 models.
3. small-sized mixing recording as claimed in claim 1 or 2 shields device, it is characterised in that：The main control module includes master
Control chip, clock module, the power supply termination 3.3V voltages of the main control chip, and 3 ground capacities in parallel, its signal input part
One resistance of series connection, an earth resistance in parallel and another ground capacity, the main control chip is connected with clock module, described
Crystal oscillator is provided with inside clock module, and crystal oscillator two ends connect respectively a ground capacity.
4. small-sized mixing recording as claimed in claim 1 shields device, it is characterised in that：It is provided with inside the transformer module
Multiple transformers, the power end of each transformer is connected a pull-up resistor, the output end connection ultrasonic wave of each transformer
Multiple ultrasonic sensors in module, the input of each transformer connects with a triode in triode isolation module
Connect.
5. small-sized mixing recording as claimed in claim 4 shields device, it is characterised in that：Transformation in the transformer module
Device quantity is identical with the quantity of the triode in triode isolation module, and connects one to one.
6. small-sized mixing recording as claimed in claim 1 shields device, it is characterised in that：The triode isolation module is by more
Individual triode, driving chip composition, the grid of each triode is connected with the output end of driving chip, the driving chip
Input is connected with the output end of the main control chip in main control module.
7. small-sized mixing recording as claimed in claim 1 shields device, it is characterised in that：The remote control module by WIFI or
Bluetooth is connected with the main control module, communicates wirelessly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610915955.9A CN106658285A (en) | 2016-10-21 | 2016-10-21 | Miniature frequency-mixing and recording isolator |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610915955.9A CN106658285A (en) | 2016-10-21 | 2016-10-21 | Miniature frequency-mixing and recording isolator |
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| CN106658285A true CN106658285A (en) | 2017-05-10 |
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| CN201610915955.9A Pending CN106658285A (en) | 2016-10-21 | 2016-10-21 | Miniature frequency-mixing and recording isolator |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107547977A (en) * | 2017-10-13 | 2018-01-05 | 成都信息工程大学 | A kind of anti-phonographic recorder of low-and high-frequency for mini-session |
| CN109660313A (en) * | 2018-11-27 | 2019-04-19 | 点阵纵横科技(北京)有限责任公司 | A kind of layout and its design method of interference unit of recording |
| CN114338894A (en) * | 2022-03-07 | 2022-04-12 | 天津市英讯科技有限公司 | Mobile phone recording shielding system and method |
| CN114696940A (en) * | 2022-03-09 | 2022-07-01 | 电子科技大学 | Recording prevention method for meeting room |
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| US20150043744A1 (en) * | 2013-08-09 | 2015-02-12 | GM Global Technology Operations LLC | Masking vehicle noise |
| CN105306162A (en) * | 2015-10-29 | 2016-02-03 | 天津光电安辰信息技术有限公司 | Mixing-based recording shielding device and realizing method thereof |
| CN206237590U (en) * | 2016-10-21 | 2017-06-09 | 天津市英讯科技有限公司 | Small-sized mixing recording shielding device |
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| CN201051742Y (en) * | 2007-04-17 | 2008-04-23 | 顾然 | Examination room and conference room detection prevention shielding scheduling combiner |
| CN203243413U (en) * | 2013-04-28 | 2013-10-16 | 黑龙江工程学院 | Anti-eavesdropping and recording blocker device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107547977A (en) * | 2017-10-13 | 2018-01-05 | 成都信息工程大学 | A kind of anti-phonographic recorder of low-and high-frequency for mini-session |
| CN109660313A (en) * | 2018-11-27 | 2019-04-19 | 点阵纵横科技(北京)有限责任公司 | A kind of layout and its design method of interference unit of recording |
| CN114338894A (en) * | 2022-03-07 | 2022-04-12 | 天津市英讯科技有限公司 | Mobile phone recording shielding system and method |
| CN114696940A (en) * | 2022-03-09 | 2022-07-01 | 电子科技大学 | Recording prevention method for meeting room |
| CN114696940B (en) * | 2022-03-09 | 2023-08-25 | 电子科技大学 | Conference room anti-recording method |
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Application publication date: 20170510 |