CN207219018U - One kind orientation sound equipment - Google Patents

Abstract

The utility model discloses one kind to orient sound equipment, including data acquisition process integrated module, D classes power driver module and ultrasonic energy modular converter, the ultrasonic wave output terminal of the data acquisition process integrated module electrically connects the signal input part of the D classes power driver module, the output end of the D classes power driver module electrically connects the ultrasonic energy modular converter, the data acquisition process integrated module is STM microprocessors, for gathering, handling voice signal, output ultrasonic wave；The D classes power driver module is used to amplify ultrasonic wave；The ultrasonic energy modular converter is used to convert the waves into orientation mechanical oscillation signal.Orientation sound equipment of the present utility model, high sensing, low diffraction, voice directional spreading, accuracy can be made high.

Description

One kind orientation sound equipment

Technical field

Sound technique field is the utility model is related to, specifically, is related to a kind of orientation sound equipment.

Background technology

Traditional sound principle has the characteristics that omnidirectional's row, high diffraction, and these features make the unordered propagation of sound, to week Noise pollution is caused in collarette border, and causes various mixed and disorderly sound to mask the sound really to be listened, at present, people's generally use Mitigate the unordered propagation of sound to the mode of conventional horn plus orientation cover, but such a mode is also only to reduce sound Unordered propagation, without the direction propagation of fundamentally solution sound.

In addition, in existing acoustic processing class sound equipment, the acquisition process of audio signal uses special audio DSP module, For sample frequency than relatively low, highest can be only achieved 192K, and accuracy is low.

Utility model content

Technical problem to be solved in the utility model is：A kind of high sensing, low diffraction are provided, can pass sound orientation Broadcast, the orientation sound equipment that accuracy is high.

In order to solve the above technical problems, the technical solution of the utility model is：

One kind orientation sound equipment, including：

Data acquisition process integrated module, the data acquisition process integrated module are STM microprocessors, for gathering, Handle voice signal, output ultrasonic wave；

D class power driver modules, the ultrasonic wave output terminal of the data acquisition process integrated module electrically connect the D classes work( The signal input part of rate drive module, the D classes power driver module are used to amplify ultrasonic wave；

Ultrasonic energy modular converter, the output end of the D classes power driver module electrically connect the ultrasonic energy and turned Block is changed the mold, the ultrasonic energy modular converter is used to convert the waves into orientation mechanical oscillation signal.

Preferably, the data acquisition process integrated module is STM32 microprocessors.

Preferably, the ultrasonic energy modular converter is the ultrasonic energy modulus of conversion of piezoelectric ceramics or piezoelectric membrane Block.

Preferably, the Hz-KHz of the D classes power driver module is 20Hz~20K Hz.

Preferably, the switching frequency of the D classes power driver module is more than 1.2M Hz.

After employing above-mentioned technical proposal, the beneficial effects of the utility model are：

Orientation sound equipment of the present utility model, by data acquisition function and a piece of micro- places of integrated STM of signal processing function Chip, collected sound signal are managed, and is processed into ultrasonic wave, sampling rate has arrived intermediate frequency 1.2M, and accuracy is high, then passes through D classes Power driver module amplifies ultrasonic signal, then is used to be converted to ultrasonic wave by ultrasonic energy modular converter and orients machinery Vibration signal, realize the high sensing of sound, low diffraction direction propagation.The utility model uses STM micro-chip processors and D class power Drive module, sample rate and operating efficiency are substantially increased, improve accuracy.

Brief description of the drawings

The utility model is described in further detail with reference to the accompanying drawings and examples：

Fig. 1 is structural representation of the present utility model；

Fig. 2 is process chart of the present utility model；

In figure：1-STM32 microprocessors；2-D class power driver modules；3- ultrasonic energy modular converters.

Embodiment

In order that the purpose of this utility model, technical scheme and advantage are more clearly understood, below in conjunction with accompanying drawing and implementation Example, the utility model is further elaborated.It should be appreciated that specific embodiment described herein is only explaining The utility model, it is not used to limit the utility model.

Reference picture 1, orientation sound equipment of the present utility model, including data acquisition process integrated module, D class power driver modules 2 and ultrasonic energy modular converter 3.The ultrasonic wave output terminal electrical connection D class power drives of data acquisition process integrated module The signal input part of module 2, the signal input of the output end electrical connection ultrasonic energy modular converter 3 of D classes power driver module 2 End.

Wherein, data acquisition process integrated module is STM32 microprocessors 1, and STM32 series microprocessors are based on aiming at and wanted The microprocessor for the ARM Cortex-M3 core designs that the Embedded Application of high-performance, low cost, low-power consumption specially designs is sought, For collected sound signal and handled, primary signal is modulated to the fixed frequency selected according to ultrasonic energy modular converter Rate scope, the ultrasonic wave of the frequency range is exported, sampling rate has arrived intermediate frequency 1.2M, and accuracy is high, and modulation system is flexible, easily In debugging.

D classes power driver module 2 is used to amplify ultrasonic wave, and frequency response range of choice is 20Hz~20K Hz；D class power drives The main function of module 2 is the rear class driving as whole system, is exported after ultrasonic signal is carried out into power amplification to ultrasound Wave energy modular converter, the frequency response range of power amplifier module must be appropriate for the working frequency of the system, for example we commonly use 40khz sine wave must be in more than 60khz as carrier wave, the then Hz-KHz of power amplifier.The distortion factor of D classes power driver module 2 Low, good heat dissipation effect, operating efficiency are high, and in order to reach satisfied effect, the switching frequencies of D class power driver modules at least will be More than 1.2MHZ.

Ultrasonic energy modular converter 3 is used to ultrasonic wave being converted to orientation mechanical oscillation signal, and general frequency is in 40khz More than, alternative ultrasonic energy modular converter 3 has piezoelectric ceramics, pvdf piezoelectric membranes etc..

Reference picture 2, according to the flow direction of signal, the signal of product of the present utility model originates in be adopted to original audio signal Collection obtains, and the mode for obtaining audio signal is generally two ways, and one kind is analog form：By ADC to audio signal Collection, by analog signal digital, one kind is pure digi-tal mode：Directly obtained by USB interface or digital audio interface original Audio signal.The audio signal got enters STM32 microprocessors 1, realizes digital modulation algorithm, and such a pattern has spirit Activity is big, is easy to the advantages of debugging.The signal for carrying out digital processing has been the signal with carrier wave and audio, by this signal It is input to power amplifier and carries out power amplification, A classes, B classes, AB classes, D class power amplifications can be used, the utility model uses D class work( Put, because the power amplification of D classes has very high conversion efficiency, while the requirement to D class power amplifiers is generally switching frequency and existed More than 1MHZ.D class power amplifiers refer to D-type audio power amplifier (otherwise referred to as digital power amplifier).Pass through controlling switch unit ON/OFF, the amplifier of drive the speaker claims class-D amplifier.

Impedance matching is done, then inputs a signal into ultrasonic wave for filtering, impedance matching, conventional intermediate-frequency transformer after power amplifier Energy conversion module, mechanical wave being converted a signal into, this mechanical wave is high frequency machinery ripple, after the demodulation function of air, people Ear with regard to original audio signal can be heard.

Orientation sound equipment of the present utility model, data acquisition function and signal processing function is micro- with a piece of integrated STM32 Process chip, collected sound signal, and ultrasonic wave is processed into, sampling rate has arrived intermediate frequency 1.2M, and accuracy is high, then passes through D Class power driver module 2 amplifies ultrasonic signal, then by ultrasonic energy modular converter 3 for ultrasonic wave to be converted into orientation Mechanical oscillation signal, it is transmitted into using high-frequency ultrasonic signal as audio signal for carrier wave in air, the signal possesses super The characteristics of sound wave high directivity, low diffraction, make one to hear audio signal by the demodulation and can of air, fundamentally possess sound The ability that tone lateralization is propagated, efficiently avoid the unordered propagation of sound.Realize the high sensing of sound, low diffraction direction propagation. The utility model uses STM32 microprocessors 1 and D classes power driver module 2, substantially increases sample rate and operating efficiency, carries High accuracy.

Products application of the present utility model needs the field of direction propagation sound in civilian, commercial.It can also be used for civilian, business With the field that need to hear reflected sound, mural painting sounding is such as simulated.

Citing described above for the utility model preferred forms, wherein the part do not addressed in detail is this area The common knowledge of those of ordinary skill.The scope of protection of the utility model is defined by the content of claim, any to be based on this reality The equivalent transformation carried out with new technical inspiration, also within the scope of protection of the utility model.

Claims (5)

1. one kind orientation sound equipment, it is characterised in that including：

Data acquisition process integrated module, the data acquisition process integrated module is STM microprocessors, for gathering, handling Voice signal, output ultrasonic wave；

D class power driver modules, the ultrasonic wave output terminal of the data acquisition process integrated module electrically connect the D classes power and driven The signal input part of dynamic model block, the D classes power driver module are used to amplify ultrasonic wave；

Ultrasonic energy modular converter, the output end of the D classes power driver module electrically connect the ultrasonic energy modulus of conversion Block, the ultrasonic energy modular converter are used to convert the waves into orientation mechanical oscillation signal.

2. orientation sound equipment according to claim 1, it is characterised in that：The data acquisition process integrated module is STM32 Microprocessor.

3. orientation sound equipment according to claim 1, it is characterised in that：The ultrasonic energy modular converter is piezoelectric ceramics Or the ultrasonic energy modular converter of piezoelectric membrane.

4. the orientation sound equipment according to any one of claims 1 to 3, it is characterised in that：The frequency of the D classes power driver module It is 20Hz~20KHz to ring scope.

5. orientation sound equipment according to claim 4, it is characterised in that：The switching frequency of the D classes power driver module is big In 1.2MHz.