135 results about "Sound film" patented technology

The invention discloses an audio frequency device with a graphene composite sound film. The audio frequency device is provided with a vibration sound film, a shell frame, a drive circuit or a sensing circuit, wherein the shell frame defines a cavity in which the vibration sound film vibrates, and the drive circuit or the sensing circuit is used for driving the sound film to produce sound through vibration or sensing the vibration of the vibration sound film so as to output a signal. The vibration sound film of the audio frequency device is a composite sound film and is formed by compositing a fiber meshy graphene layer and a thin polymer film. By means of the graphene composite sound film, the thickness and quality of the composite sound film can be remarkably reduced, the acoustical frequency response characteristic of the sound film is improved, and the sensitivity and fidelity of the audio frequency device are improved. The audio frequency device is convenient to install, high in durability and reliability and low in manufacture cost, and tone quality and tone are greatly improved on the premise that high frequency response characteristic is kept.

The invention relates to an earpiece loudspeaker automatic production device and a production process thereof. The device comprises a dispensing device, a curing device, a spot welding device, a tinning device, a detection device and a receiving device, wherein the dispensing device, the curing device, the spot welding device, the tinning device, the detection device and the receiving device are respectively arranged on a frame. The frame is provided with a circulation conveying mechanism which is used for carrying a product. The dispensing device is composed of a first dispensing mechanism, a second dispensing mechanism and a third dispensing mechanism. The curing device comprises a curing circulation mechanism and a UV lamp curing mechanism. The device provided by the invention has the advantages that an automatic dispensing station and an automatic tin machine are used to realize automatic product dispensing and welding, which effectively improves the precision of dispensing position, the tin amount, a welding point and the like; the device is provided with an automatic detection device, which can ensure the yield in a product production process; the magnetic loop, the cover and the sound film of an earpiece loudspeaker are assembled; automatic circulation production is realized through the circulation conveying mechanism; the production efficiency is effectively improved; the production cost is reduced; and the device has the characteristics of simple processing process, easy production and use and high practicability.

A mask is provided with a sound-transmitting structure, which can transmit the spoken sound to the outside of the mask without removing the same. The mask comprises a mask body and a sound-transmitting structure, wherein the mask body is provided with the sound-transmitting hole, the sound-transmitting structure comprises the sound film and the sound inside the mask may be clearly transmitted to the outside of the mask through the sound-transmitting hole and the sound-transmitting structure.

The invention relates to a testing method of a machine vision based micro-sound film concentricity online testing system. The machine vision based micro-sound film concentricity online testing system comprises an optical imaging subsystem, a digital image processing subsystem, a motion control subsystem, a sound film eliminating subsystem, an image capture card and a motion control card, wherein signals of the optical imaging subsystem are sent to the image capture card through an interface, and the image capture card captures a frame of sound film gray scale image data and sends the data to the digital image processing subsystem to be processed and judged; a signal output end of the digital image processing subsystem is connected with a signal input end of the motion control card, and a signal port of the motion control card is respectively connected with the motion control subsystem and the sound film eliminating subsystem; and the motion control subsystem and the sound film eliminating subsystem are intensively controlled by the motion control card. The machine vision based micro-sound film concentricity online testing system realizes the precise positioning of sound films and the elimination of unqualified sound films by the motion control card controlling a stepper motor, a servo motor, a sensor, an eliminating device and the like, thereby realizing the high-precision online real-time testing of the sound films.

The invention discloses a real-time voice signal receiving device based on a self-mixing interference measuring method. The real-time voice signal receiving device is characterized by being provided with a cylindrical casing, a sound film and a semiconductor laser, wherein a closed cavity is formed inside the cylindrical casing; the cylindrical casing is fixedly connected with a measured object; the sound film is positioned on the cross section of the closed cavity of the cylindrical casing and is supported on a positioned step connected with the inner side wall of the cylindrical casing at the periphery; the semiconductor laser is fixedly arranged at the position coaxial with the sound film in the closed cavity of the cylindrical casing by a rigid bracket; the semiconductor laser is used for transmitting an optical signal to the sound film and receiving a feedback optical signal from the sound film; a photoelectric detector is used as a photoelectric signal conversion unit; and a signal processing unit is used for receiving an output signal of the photoelectric detector and outputting a sound detection signal. According to the real-time voice signal receiving device disclosed by the invention, the sound signal is sensed by using the self-mixing effect of the semiconductor laser, electromagnetic interference is avoided and an outside sound signal can be received at high sensitivity and high precision and in wide range.

The invention provides an earphone sound film and particularly relates to an earphone magnetism vibrating film which comprises a vibrating film body of a sound film and particle permanent magnets. The earphone magnetism vibrating film is characterized in that a plurality of particle permanent magnets which are the same in polarity directions are paved on the vibrating film body of the sound film. A magnetic field generated by audio currents reacts with a relative even magnetic field provided by the particle permanent magnets on the vibrating film body of the sound film, the sound film is driven to vibrate evenly in a whole mode, generated sound wave distortion is low, dynamic is high, and reaction is sensitive.

The invention provides a loudspeaker assembling method which comprises a step of providing a first film stretching board, providing a first pad side, gluing and fixing the diaphragm on the first film stretching board and the first pad side, and completing the assembly of a diaphragm component, and a step of providing a second film stretching board, providing a second pad side, gluing and fixing the diaphragm on the second film stretching board and the second pad side, and completing the assembly of a sound film component. The invention provides the loudspeaker assembling method, through adding the first pad side and the second pad side with the same outer dimension to assist the assembly positioning of a loudspeaker, thus the automation of the whole assembly sequence of the loudspeaker is facilitated, the positioning precision of the sound film and a flexible circuit board is ensured, and thus the consistency of product assembly is improved.

The invention discloses a single-film bone conduction earphone with double functions and double sound effects. A cover without holes is mounted at the opening of an accommodating cavity inside an earphone shell in an embedded mode; an audio cable is mounted and arranged on the opposite side, at the position of the opening of the accommodating cavity, of the earphone shell; a vibration assembly and an audio signal input assembly are mounted in the accommodating cavity in the embedded mode; the audio signal input assembly comprises hollow voice coil windings and an audio signal connecting plate; the vibration assembly comprises a cylinder-shaped concentrating flux plate, annular permanent magnets and a cylinder-shaped permanent magnet; heteropolar surfaces of the cylinder-shaped permanent magnet and the annular permanent magnets are tightly adsorbed to the cylinder-shaped concentrating flux plate; the cylinder-shaped concentrating flux plate is coaxially and seamlessly riveted to a circular vibration sound film on the opposite side of the cylinder-shaped permanent magnet. Through the structural design, the earphone can obtain double sound effects by taking bone conduction as the principal thing and taking air conduction as the auxiliary thing, and has double functions that the earphone is suitable for both hearing normal people and hearing handicapped; the earphone is novel in design and simple in structure, and can effectively alleviate burden and direct stimulation for eardrums to relieve early ear hearing loss.

The invention discloses a sound film detection method which comprises the following steps: arranging an operating platform, a vision controller and a programmable logic controller (PLC), wherein the operating platform is provided with a turntable; the turntable is provided with a feeding station, a photographing station, an elimination station and a discharging station in sequence; a defective product station is arranged at one side of the elimination station; a camera which can move along X-axis and Y-axis directions is arranged above the turntable opposite to the photographing station; a sucking disc which can move along the X-axis, Y-axis and Z-axis directions is arranged above the turntable opposite to the elimination station; and the PCL is respectively connected with a turntable motor for driving the turntable, a servo motor for driving the camera, a servo motor for driving the sucking disc and the vision controller. The sound film detection method and sound film detection system provided by the invention can be used for rapidly and automatically inspecting the shape and size of the sound film; the inspection efficiency is high, the inspection quality is reliable, the operation is simple, the production cost can be effectively lowered, and the product quality is guaranteed.

The present invention provides a titanium sound film for loudspeaker. The invention is characterized in that the titanium foil is manufactured through the following processes: processing titanium strip material through a multi-roller foil mill or executing more than two times of rolling to a thickness of 0.02mm-0.1mm, cleaning for degreasing after aligning and leveling, annealing through a vacuum annealing oven in the temperature of 530-640 DEG C, keeping the temperature for 2-4 hours, facilitating the vacuum degree to above 10, and taking the titanium sound film out from the furnace. The finished product is obtained after taking out. The acoustic quality of titanium sound film according to the invention is excellent. The punching capability, plasticity and material hardness can totally obtain the using requirement.

The invention discloses a moving iron type low frequency acoustic generator, comprising a basin rack, a supporter, a gasket, a quality sheet, a magnetic cup, a sound film, a front cover, a magnetic steel, a plywood, a printed circuit board, a voice coil and a rear cover, wherein the magnetic cup, the magnetic steel and the plywood form a constant magnetic circuit system, the constant magnetic circuit system and the supporter forms a vibratory magnetic circuit system; the supporter and the basin rack are subjected to integrated injection moulding in a structural manner of embedded part, the gasket is arranged between the quality sheet and the supporter, the edge of the sound film is fixed on the basin rack and the center of the sound film is connected with the vibratory magnetic circuit system, the front cover is arranged outside the sound film, a magnetic gap is formed between the magnetic cup and the plywood, the printed circuit board is fixed on the basic rack, one end of the voice coil is fixed on the rear cover, and the other end of the voice coil is inserted into the magnetic gap of the constant magnetic circuit system. The moving iron type low frequency acoustic generator of the invention with small volume can mainly be applied to some products which requires relatively low frequency but not large volume, such as portable fetal sound receiver, thus the fetal sound detected by the portable fetal sound receiver can be played.

The invention discloses a speaker and a manufacturing method thereof. The speaker of the invention comprises a basin-shaped frame component, and a sound emitting component is fixed in the front of basin-shaped frame component; a magnetic conductive mesh enclosure is fixed in the front of the sound emitting component; the basin-shaped frame component comprises a basin-shaped frame, a basin-shaped frame breach is provided on the basin-shaped frame; the sound emitting component comprises a voice coil and an internal lead which is fetched out from the voice coil; the internal lead is fetched out from the basin-shaped frame breach of the basin-shaped frame and is fixed at the peripheral edge of the basin-shaped frame breach by a colloid fixation point. In the manufacturing method of the speaker, a product performance test is carried out under the state that the basin-shaped frame component and the sound emitting component are magnetically pulled in with the magnetic conductive mesh enclosure; when finding sub-par performance, means such as leading the basin-shaped component and sound emitting component to generate relative move can be adopted to adjust the relative position of the internal lead and a sound film so as to change sound emitting effect and carry out the test directly. The speaker and the manufacturing method of the invention can effectively promote the sound emitting effect of the speaker, particularly improve the distortion characteristic of the speaker and heighten the product percent of pass.

The invention relates to a lead spot welding tooling and a lead spot welding method for sound films of loudspeakers. The lead spot welding tooling comprises a lower base and an upper press base. The upper end face of the lower base is provided with limit flanges and a boss. The boss is provided with a positioning hole. The inner wall of the positioning hole is provided with a positioning groove. An annular step surface for mounting a sound coil is arranged at the upper end of the boss. The upper press base comprises a first base body and a second base body inserted into the positioning hole. The diameter of the first base body is larger than the diameter of the positioning hole. The second base body is provided with a positioning insert matched with the positioning groove. Lead retaining support legs are arranged on two side walls of the first base body. The limit flanges are respectively provided with a lead clamping notch. Two leads of the sound coil are subjected to spot welding on a frame without mutual contact, are loosened sufficiently and cannot vibrate along with the sound films, so that breakage of the leads due to fatigue is effectively avoided, and the service life of products is prolonged. Further, the integral load of the sound films is reduced, the loudspeakers are better in pure tone and low in distortion, operation can be completed by only one person, work efficiency is improved and labor cost is reduced.

The invention discloses a laser MEMS microphone, which comprises a light source and a microphone structure, and is characterized in that the microphone structure comprises a substrate, a back plate, avibration sound film, a front cavity formed by the substrate and the vibration sound film, and a rear cavity formed by the vibration sound film and the back plate; the light source is a VCSEL, and the back plate and the vibration sound film are respectively provided with a plurality of sound holes which are manufactured through an MEMS technology. The VCSEL emits a laser beam to the vibration sound film; the vibration sound film reflects part of the laser beam to the VCSEL resonant cavity; the reflected laser beam carries sound information of vibration of the vibration sound film, and the partially reflected laser beam is mixed with laser in the VCSEL resonant cavity to generate a laser self-mixing interference effect; the output power and frequency of the VCSEL are changed, and the junction voltage on the VCSEL is extracted; and after amplification and demodulation, the signals are converted into audio waveforms, thereby realizing conversion from sound signals to electric signals. The laser MEMS microphone is high in pickup signal-to-noise ratio, small in size and high in electromagnetic interference resistance.

The invention discloses a dual-film dual-conduction multi-channel earphone. Each earphone is provided with a metal base, a cylindrical yoke, cylindrical permanent magnets, and a component, wherein the cylindrical yoke is arranged in the center of the metal base; the cylindrical permanent magnets are arranged outside the yoke in a coaxial radial order; the component consists of a coil winding and the cylindrical yoke; a spherical sound film is bonded on the upper part of the cylindrical yoke seamlessly; the other side of the metal base is connected with another base through a screw; a spring gasket is arranged between a circular vibrating diaphragm in the middle of two bases and each base; a vibrating conducting cylinder is fixedly arranged at the periphery of the outer diameter of the circular vibrating diaphragm and on the outer side which is close to the component and is not contacted with the component; the other end of the vibrating conducting cylinder is a circular buffer gasket; the spherical sound film and the circular vibrating diaphragm conduct the sound to the auditory nerve through two media of air and skull so as to generate sense of hearing. On the basis of effectively protecting the hearing of a user, the multi-channel earphone maintains certain stimulus intensity to the cochlea, has good acoustical effect, and is beneficial for the physical and mental health of a listener.

The invention discloses a receiver and an assembling process thereof. The receiver comprises a shell, a diaphragm mechanism and an electromagnetic drive mechanism. The diaphragm mechanism is arranged in the casing, which has a fixed frame, a reed and a sound film, and the sound film is pre-fixed on the fixed frame; the electromagnetic drive mechanism includes coils arranged parallel to the diaphragm mechanism, which are installed on the coils one by one and connect the coils to each other. The electromagnetic wire that generates the magnetic field is transformed from the direction parallel to the diaphragm mechanism to the transformation member in the vertical direction. The assembly process is as follows: the first coil with the conversion piece is installed on the first casing, the first magnet is fixed on the conversion piece; the second magnet is fixed on the inner wall surface of the second casing, and the two magnets are opposite and face each other. The polarity of one end is reversed; install the diaphragm mechanism on the inner wall of the housing. The diaphragm mechanism is used as a single module as a whole. When installing the receiver, the diaphragm mechanism only needs to be fixed on the shell through the fixing frame, which simplifies the installation process of the receiver. The conversion piece reduces the height occupied by the coil within the receiver.

The invention relates to the field of electro-acoustic industry, in particular to an ultra-thin and ultra-light loudspeaker vibration sound film which has small vibration area and can generate mega bass. The loudspeaker vibration sound film is used in a loudspeaker, and the sound film is formed by bonding a fiber layer, a cork wood layer and another fiber layer together in turn. The beneficial effect of the loudspeaker vibration sound film of the invention is as follows: a fiber surface sound cone of the invention can meet the demand that a small-bore sound cone can generate mega bass and large-bore sound cone can generate high frequency sound. The fiber surface sound cone of the invention is prepared from a composite material and solves the problem that the cone and concave sound cone occupy too much space of the loudspeaker. When cork wood is adopted to prepare the composite material sound cone, the internal loss is increased by 50%, and when fiber cloth is used as the surface of the composite material, the Young modulus value of the sound cone is increased by 60% compared with NXT flat panel vibration film.

The invention relates to the technical field of loudspeakers, in particular to a miniature sounder and an assembling method thereof. The provided miniature sounder is composed of a vibration system, amagnetic circuit system, and a basin frame for accommodating and fixing the vibration system and the magnetic circuit system. The vibration system includes a sound film, a voice coil for driving thesound film to make vibration, and a support member connected to the voice coil. The sound film and the support member are respectively arranged at two opposite sides of the voice coil; and the supportmember and the basin frame are integrated into one. The manufacturing process flow of the miniature sounder provided by the invention is simplified.

A sound film adsorption device includes a bracket, which has a platform on which a sound film collect, which forms a chamber for receiving a sound film, is installed. A rotary mechanism includes a supporting post retained on the platform, a rotary plate in the form of a cantilever-shape having an end moveably coupled to the supporting post and an opposite end serving as an open end, and a spring member coupled with the supporting post to support between the platform and the rotary plate. A first absorbing mechanism includes a first vacuum generator and an absorbing head. The absorbing head has an end communicated with the first vacuum generator, and the other end extended through the open end of the rotary plate to align with the chamber of the sound film collect so as to absorb the sound film placed within the sound film collect.

The invention belongs to the vehicle alarm device technology field and particularly relates to a waterproof vehicle audio alarm device having a self protection circuit. The waterproof vehicle audio alarm device comprises a high voltage protection circuit, an intermittent tone generation circuit, a power amplification and output current circuit and a loudspeaker, wherein an upper wall of a sound film of the loudspeaker is provided with a waterproof ventilation film, the loudspeaker is connected with a positive electrode end of the high voltage protection circuit, the other end of the loudspeaker is connected with the power amplification and output current circuit, the power amplification and output current circuit is connected with the intermittent tone generation circuit, the high voltage protection circuit comprises an electric signal anti-interference network module, an emitter follower module and a protection circuit module which are sequentially connected in series and further comprises a power source anti-interference network module connected with the emitter follower module, the power source anti-interference network module is connected with the intermittent tone generation circuit, the protection circuit module and the loudspeaker, and the electric signal anti-interference network module is further provided with a protection diode. The waterproof vehicle audio alarm device has the high voltage protection function and further has properties of good waterproof performance and long service life.

The invention relates to a sounding module which comprises a base plate and a cover plate, wherein the base plate and the cover plate are opposite to each other; at least one first electrode and at least one second electrode area arranged on the base plate; and a thermal sounding film is laid on and electrically connected to the at least one first electrode and the at least one second electrode. The thermal sounding film of the thermal sounding module is sealed and fixed by the base plate and the cover plate, and thus, a complete module structure with the thermal sounding film is formed. Both opposite sides of the thermal sounding film in the thermal sounding module are respectively protected by the base plate and the cover plate, and the thermal sounding film works in a space formed by the base plate and the cover plate and reduces the damage to the external environment, thereby prolonging the service life of the thermal sounding film.

The invention provides a loudspeaker module which comprises a first shell, a loudspeaker inner core and a waterproof breathable film, the first shell is provided with a containing groove, the loudspeaker inner core is installed in the containing groove, the loudspeaker inner core comprises a voice diaphragm, a front voice cavity is formed between the voice diaphragm and the first shell, and the side, away from the front voice cavity, of the voice diaphragm is a rear voice cavity. The first shell is further provided with a resonance groove, the bottom of the resonance groove is provided with a communication hole, the resonance groove is communicated with the front sound cavity through the communication hole, and the waterproof breathable film covers an opening, facing the rear sound cavity, of the resonance groove and is used for isolating the resonance groove from the rear sound cavity so as to balance air pressure of the front sound cavity and the rear sound cavity when the loudspeaker module does not work. The problem that the sound production quality of the loudspeaker module is affected due to the fact that the sound film deviates due to different air pressures of the front sound cavity and the rear sound cavity is avoided, and the sound quality of the loudspeaker module is improved. The invention further provides electronic equipment.

The invention relates to a moving coil type miniature transmitter and receiver, which comprises a T-bar and a ring magnet arranged on the T-bar. A washer with a casing function simultaneously is arranged on the magnet, an external type magnetic path with a small gap and a long stroke is formed between the ring magnet and a center column of the T-bar, a sound film is arranged on the washer, and the lower portion of the sound film is provided with a high inductive voice resistance coil which is placed in the magnetic path. The moving coil type miniature transmitter and receiver has the advantages of having a voice transmitting and receiving functions simultaneously, small volume and good using effects.

The present invention discloses a curved sound player having a projection display function. The curved sound player having the projection display function comprises a curved display and a projection device, and also comprises a film speaker attached onto the curved display, wherein the film speaker comprises at least one sounding film, at least one conductive film, at least one insulating layer, and at least two conductive terminals; the at least one conductive film is coated on the at least one sounding film; the at least one conductive film is made from a nano-wire material; the at least one insulating layer is attached onto the at least one conductive film; the at least one insulating layer and / or a tone quality improving layer comprise(s) a plurality of groups of micro machining structures; the at least two conductive terminals are attached onto the at least one conductive film and are connected with a speaker driving circuit. According to the present invention, the film speaker and the curved projection display are combined, and the film speaker is attached onto the surface of the curved projection display; as the film speaker is transparent, the content displayed by the curved projection display is not influenced, and the display can play sound simultaneously while displaying videos or images, and therefore, the practicability of the display is enhanced, and the intelligence is relatively high.

The invention relates to the field of punching equipment, in particular to a high-precision sound film intelligent punching production line based on a visual positioning function. The high-precision sound film intelligent punching production line based on the visual positioning function sequentially comprises a first workstation, a second workstation and a third workstation along a sound film processing direction, wherein the first workstation completes inner ring processing of a sound film; the second workstation completes outer ring processing of the sound film; and the third workstation detects the appearance quality of the sound film, classifies the sound film, and arranges qualified products in a charging tray. According to the scheme, a visual positioning device is arranged before blanking, so that better positioning precision is obtained. The high-precision sound film intelligent punching production line based on the visual positioning function provided by the invention has the effect of improving the product machining precision.

The invention belongs to the field of electric sound films and discloses a collapse-free sound film. An edge arc is arranged around the sound film and provided with a decorative pattern, and the section of the edge arc is a section of arc or formed by connection of a plurality of sections of arcs, and positions where arcs are connected are in fillet smooth connection. The section of the decorative pattern is U-shaped, the width of the decorative pattern is twice of the depth of the decorative pattern, the trend of the decorative pattern is basically the same with that of the edge arc, and a radian pattern is formed if the R value is large. The sound film is made of a polyester film, computer-based 3D drawing is adopted, the edge arc and the decorative pattern are designed reasonably according to electro-acoustic parameter requirements of clients, the design of an edge and a copper ring is adopted if the thickness of the raw material of polyester film is below 16 microns, reasonable molding techniques are adopted for different materials and thicknesses, the blow molding technique is adopted for the edge and the copper ring, and the clients use collapse-free vibrating films (sound films) to assemble micro speakers, so that poor acoustic characteristic variation caused by operations, carrying and reliability experiments can be reduced greatly, the production effectiveness can be improved, costs can be reduced, the quality can be guaranteed, and the product reliability can be improved.

The invention relates to the technical field of sound films, in particular to a composite sound film structure which comprises an engineering thin film and a composite sheet arranged at the bottom of the engineering thin film in a composite mode. A thin film fixing ring is formed at the edge of the bottom of the engineering thin film through heat bonding glue in a heat press mode. The thin film fixing ring is a PET thin film fixing ring or a PEN thin film fixing ring. Due to the fact that the PET thin film and the PEN thin film have the advantages of being easy to form, free of rust or oxidation, small in thickness, low in cost, convenient to operate and the like. Thus, compared with an existing composite sound film which is strengthened with a fixing ring or a paper ring, the PET thin film fixing ring or the PEN thin film fixing ring is used by the composite sound film, and the composite sound film has the advantages of being stable in performance, low in production cost, simple in production technology, small in thickness, stable in appearance, capable of not machining a third party and the like. In addition, the invention further discloses a composite technology of the composite sound film, wherein the composite technology is simple and low in production cost.

Automatic detection of errors among different formatted sound tracks of the same language on a motion picture film stock can be achieved by first acquiring successive audio segments from each of the sound tracks. During a time window of prescribed duration, the audio of each different formatted track undergoes analysis to yield a numeric value. The successive analysis of the audio continues until no further audio exists for analysis. The resultant collection of numeric values undergoes formatting into a numeric file for comparison against a reference file representing audio obtained from a particular source, such as originally recorded material, a sound print, or a duplicated copy of a sound film. If the difference between a formatted numerical file and the reference file exceeds a threshold value, then an error exists in that formatted sound track, and an operator can take appropriate action.

The invention discloses an on-line real-time sound film concentricity detection system based on a field programmable gate array (FPGA) and a detection method thereof. The system comprises: a CCD camera, a video digit image acquisition module, a video digit image preprocessing module and the like. A signal output terminal of the CCD camera is connected with a signal input terminal of the video digit image acquisition module through a video decoding chip. The signal output terminal of the video digit image acquisition module is connected with the signal input terminal of the video digit image preprocessing module. The signal output terminal of the video digit image preprocessing module is connected with the signal input terminal of a real-time detection product in place module. The signal output terminal of the real-time detection product in place module is connected with the signal input terminal of a sound film inside and outside round edge detection module through a memory interface module and is connected with a video D / A chip respectively. The video D / A chip is connected with a VGA interface display. The signal output terminal of the sound film inside and outside round edge detection module is connected with the signal input terminal of an image analysis processing module. According to the invention, cost is low; a speed is fast; a volume is small and power consumption is low.

The invention discloses an underwater loudspeaker, comprising an upper cover, a base and a sound film; the upper cover is sealed and fixed at the upper part of the base; the sound film is sealed and fixed at the lower part of the base; a vibration driver connected with the base by a thread is arranged in a chamber enclosed by the upper cover, the base and the sound film; the vibration spring of the vibration driver is fixedly connected with a vibration transmission body; the other end of the vibration transmission body is contacted with the sound film; the current lead wire of the vibration driver is led out by a sealing hole. The vibration driver coil vibrates in a magnetic field after getting electricity and drives the vibration spring to vibrate; the vibration is transmitted by a vibration transmission body and leads the sound film contacted with the vibration transmission body to generate vibration and phonate. The underwater loudspeaker has the advantages that the structure is simple, the clearance where the coil is arranged has strong magnetic field, strong vibration of the coil can be generated by extremely small electrified current, the installablity of the audio equipment is greatly improved, therefore, the vibration driver of the structure is convenient for maintenance, the cost is low, the volume is small, the weight is light and the carrying and installation are convenient.