WO2018223462A1 - Light pillar projection type electronic loudspeaker - Google Patents

Light pillar projection type electronic loudspeaker Download PDF

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Publication number
WO2018223462A1
WO2018223462A1 PCT/CN2017/091155 CN2017091155W WO2018223462A1 WO 2018223462 A1 WO2018223462 A1 WO 2018223462A1 CN 2017091155 W CN2017091155 W CN 2017091155W WO 2018223462 A1 WO2018223462 A1 WO 2018223462A1
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Prior art keywords
device
image
pixel
electronic horn
light
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PCT/CN2017/091155
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French (fr)
Chinese (zh)
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高炎华
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宁波凯烁照明科技有限公司
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Priority to CN201710419086.5 priority Critical
Priority to CN201710419086.5A priority patent/CN107396255A/en
Application filed by 宁波凯烁照明科技有限公司 filed Critical 宁波凯烁照明科技有限公司
Publication of WO2018223462A1 publication Critical patent/WO2018223462A1/en

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02Details
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/06Loudspeakers

Abstract

A light pillar projection type electronic loudspeaker, comprising a light pillar projection device (1), an electronic loudspeaker body (2), and a CORTEX-A15 processing chip (3). The electronic loudspeaker body (2) comprises T-yoke, magnetic steel, a spring washer, a frame, a damper, a sound coil, a skeleton, a removing loop, a cone, and a dustproof cover; when the loudspeaker is horizontally placed and produces sound facing towards the right, the T-yoke, the magnetic steel, the spring washer, the frame, the damper, the sound coil, the skeleton, the removing loop, the cone, and the dustproof cover are sequentially and horizontally arranged from left to right; the CORTEX-A15 processing chip (3) and the light pillar projection device (1) are both disposed on the skeleton; the CORTEX-A15 processing chip (3) is connected to the light pillar projection device (1) for use to control a projection direction and a projection intensity of a light pillar projected by the light pillar projection device (1). The light pillar projection type electronic loudspeaker can achieve real-time recognition and real-time irradiation on criminals near a vehicle.

Description

Light column projection type electronic horn Technical field

The invention relates to the field of car speakers, and in particular to a light column projection type electronic horn.

Background technique

The size of the speaker is naturally the bigger the better, the large-diameter woofer can have better performance in the low frequency part, he can choose among the purchase. Speakers made with high-performance speakers mean lower transient distortion and better sound quality. Ordinary multimedia speakers woofer speakers are mostly between 3 and 5 inches. Speakers made with high-performance speakers also mean lower transient distortion and better sound quality.

The most common electric cone cone speaker. The electric cone-shaped horn is often referred to as a paper cone horn. Although the diaphragm was still dominated by paper cones in 2014, many polymer material diaphragms and metal diaphragms appeared at the same time. It is. Conical paper cone speakers are mainly composed of magnetic circuit system (permanent magnet, core column, magnetic conductive plate), vibration system (paper cone, voice coil) and support auxiliary system (centering piece, basin frame, cushion). Partial composition.

1. Voice coil: The voice coil is the driving unit of the cone-shaped cone speaker. It is wound on the paper tube by two layers of very thin copper wire. Generally, it is wound around several dozen turns, also called coil, placed on the magnetic core. The magnetic interference gap formed by the column and the magnetic conductive plate. The voice coil is fixed with the paper cone. When the sound current signal enters the voice coil, the voice coil vibration drives the paper cone to vibrate.

2. Paper cone: There are many kinds of materials used for the cone diaphragm of the cone cone. There are two types of natural fiber and man-made fiber. Natural fibers are usually made of cotton, wood, wool, silk, etc., and rayon is made of rayon, nylon, glass fiber, and the like. Since the paper cone is the sound radiating device of the horn, the vocal performance of the horn is determined to a considerable extent, so no matter which kind of paper cone, it is required to be light and rigid, and cannot be deformed due to changes in ambient temperature and humidity. .

3. Folding ring: The folding ring is set to ensure the movement of the paper cone along the axial direction of the horn and to limit the lateral movement. At the same time, it acts to block the front and back of the paper cone. The material of the folding ring is in addition to the paper cone In addition to the material, it is also bonded to the paper cone by hot pressing using plastic, natural rubber, and the like.

4. Centering piece: The centering piece is used to support the joint of the voice coil and the paper cone to ensure that it is vertical without skewing. There are many concentric rings on the centering piece, so that the voice coil can freely move up and down in the magnetic gap without lateral movement, ensuring that the voice coil does not touch the magnetic plate. The dust cover on the centering piece is to prevent the external dust from falling into the magnetic gap, avoiding the friction between the dust and the voice coil, and causing the horn to produce an abnormal sound.

The existing in-vehicle electronic horn lacks various intelligent functions related to police operations, such as identifying nearby criminals and projecting the light column of the criminals to nearby criminals to remind police officers and nearby people to capture or evade.

Summary of the invention

In order to solve the above problems, the present invention provides a light column projection type electronic horn, which acquires a surrounding image of a vehicle by a high-precision image capturing device including a plurality of CCD sensing units connected in parallel, and recognizes a face in a human body image in an image around the vehicle. Feature, matching facial features in the human sub-image with criminal facial features, and if the matching is successful, outputting a criminal detection signal, determining the elevation angle based on a relative position of the human sub-image in the binarized image And the azimuth angle, upon receiving the criminal detection signal, opening the light column projection device, and transmitting a projection direction including the elevation angle and the azimuth angle to the light column projection device to control the light column The projection device projects a light beam to nearby criminals.

According to an aspect of the present invention, a light column projection type electronic horn is provided, the system comprising a light column projection device, an electronic horn main body and a CORTEX-A15 processing chip, the electronic horn main body comprising T iron, magnetic steel, and a washer, a basin frame, a bomb wave, a voice coil, a skeleton, a split ring, a cone and a dust cover, when the horn is horizontally placed and facing the right side, the T iron, the magnetic steel, the washer, the The basin frame, the elastic wave, the voice coil, the skeleton, the split ring, the cone and the dust cover are horizontally placed from left to right;

Wherein the CORTEX-A15 processing chip and the beam projection device are disposed on the skeleton, and the CORTEX-A15 processing chip is connected to the beam projection device for controlling projection of the beam projection device Direction and projection intensity.

More specifically, in the light column projection type electronic horn, the light column projection device and the electronic horn main body are both disposed on a roof of a vehicle, and the light column projection device is performed by using a cold light source. Light column projection.

More specifically, the optical column projection type electronic horn further includes: a switch driving device disposed in the front panel of the vehicle and connected to the electronic horn main body for opening the driving signal when receiving the opening signal The electronic horn body is used for sound playback, and is also used to turn off the electronic horn main body to stop the sound playing when the driving signal is turned off.

More specifically, in the light column projection type electronic horn, the CORTEX-A15 processing chip is disposed in a front end dashboard of the vehicle and is connected to the switch driving device.

More specifically, in the light column projection type electronic horn, the method further includes:

An automatic protection device, comprising a vibration sensor, connected to the electronic horn body for detecting a vibration value at the main body of the electronic horn, and when the vibration value at the main body of the electronic horn is greater than or equal to a preset vibration threshold, the control center The main body of the electronic horn plays the siren sound;

The light intensity detecting device is disposed on a roof of the vehicle for detecting an intensity of the illumination light outside the vehicle to output a real-time light intensity;

The light intensity change rate detecting device is connected to the light intensity detecting device and configured to detect a change rate of the real-time light intensity. When the rate of change of the real-time light intensity is greater than or equal to the preset change rate threshold, the signal with a high rate of change is issued, otherwise , issuing a normal rate of change signal;

An adaptive sensing device is disposed on the dust cover of the electronic horn main body and connected to the light intensity change rate detecting device for collecting video data of the surrounding environment of the vehicle to output an environmental video composed of multi-frame high-definition images. flow;

The adaptive sensing device includes a pixel data reading device and each pixel data acquiring device, and each pixel data acquiring device includes a plurality of parallel CCD sensing units, each pixel is received when the rate of change normal signal is received. The data acquisition device uses only data sensed by one of the plurality of CCD sensing units connected in parallel and outputs, and when receiving the signal with excessive rate of change, each pixel data acquisition device will be connected in parallel The data sensed by the CCD sensing unit is combined and outputted, and the pixel data reading device is respectively connected to each pixel data acquiring device for respectively reading out the data output by each pixel data acquiring device as the pixel value of each pixel. The pixel values of the respective pixels constitute a high-definition image of one frame;

An initial modeling device is connected to the adaptive sensing device, performs median filtering of a 5 pixel×5 pixel filtering template on the first frame image of the ambient video stream, acquires a median filtered image, and filters the median value The image is output as an initialized background image;

The background update device receives, for each new frame image of the environment video stream, each pixel in the new one frame image as the target pixel, and performs the following processing: the pixel value of the target pixel and the pixel of the corresponding position pixel in the background image. The value is matched. If the matching is successful, the target pixel is used as the background point. If the matching fails, the target pixel is used as the non-background point. In the statistical environment video stream previous image, the pixel corresponding to the target pixel is determined as the background point. a probability that, when the probability is greater than or equal to the preset probability threshold, the pixel value at the corresponding position of the target pixel in the background image is updated by using the pixel value of the latest image determined as the background point in the corresponding position of the target pixel in the previous image; After the device performs the above processing on the last pixel in the new one frame image, the device outputs the updated background image;

a foreground segmentation device, coupled to the background update device, for subtracting a new one frame image of the environment video stream from the background image of the new frame image updated by the background update device based on the environment video stream to obtain a foreground image An image output; a binarization processing device, coupled to the foreground segmentation device, configured to receive the foreground image, perform binarization processing on the foreground image to obtain a binarized image;

a human body detecting device, coupled to the binarization processing device, configured to receive the binarized image, and perform recognition based on a preset human motion trajectory on the target in the binarized image to determine the binary value Generating a human body target in the image, and outputting a human body image corresponding to the human body target and segmented from the binarized image;

a facial recognition device, coupled to the human body detecting device, for identifying facial features in the human sub-image, matching facial features in the human sub-image with criminal facial features, and successfully matching, outputting a criminal detection signal And determining the pitch angle and the azimuth angle based on a relative position of the human sub-image in the binarized image; otherwise, issuing a non-criminal signal;

The CORTEX-A15 processing chip is coupled to the facial recognition device for opening the light column projection device upon receiving the criminal detection signal, and transmitting a projection direction including the elevation angle and the azimuth angle Projecting the light column to the device;

Wherein the CORTEX-A15 processing chip further determines a real-time distance of the human sub-image corresponding to the human body target distance from the adaptive sensing device based on a depth of field of the human sub-image in the binarized image; the CORTEX The A15 processing chip controls the projection intensity of the projection beam of the light column projection device based on the real-time distance.

More specifically, in the light column projection type electronic horn: the CORTEX-A15 processing chip turns off the light column projection device upon receiving the sinless signal.

More specifically, the optical column projection type electronic horn further includes: a wireless communication device connected to the CORTEX-A15 processing chip, for receiving the criminal detection signal from the remote police monitoring center The latest offender facial features are downloaded at the server for forwarding to the facial recognition device via the CORTEX-A15 processing chip.

More specifically, the optical column projection type electronic horn further includes: an environmental parameter collecting device disposed at a top of the vehicle and in the vicinity of the adaptive sensing device for collecting near the adaptive sensing device Ambient light is output as the current brightness.

More specifically, in the light column projection type electronic horn: the adaptive sensing device includes a flash device for receiving the current brightness and adjusting a flash intensity of the flash device based on the current brightness.

DRAWINGS

Embodiments of the present invention will be described below with reference to the accompanying drawings, in which:

1 is a block diagram showing the structure of a light column projection type electronic horn according to an embodiment of the present invention.

LIST OF REFERENCE NUMERALS: 1 light column projection device; 2 electronic horn body; 3CORTEX-A15 processing chip

detailed description

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the optical column projection type electronic horn of the present invention will be described in detail with reference to the accompanying drawings.

A horn, also known as a speaker, is a transducing device that converts an electrical signal into an acoustic signal. The performance of the speaker has a great influence on the sound quality. The speaker is one of the weakest devices in audio equipment, and he is one of the most important parts for sound effects. There are many different types of speakers, and the prices vary greatly. Audio power passes through electromagnetic, piezoelectric or electrostatic effects, causing the cone or diaphragm to vibrate and resonate (resonate) with the surrounding air to produce sound.

Low-grade plastic speakers have a thin body that cannot overcome resonance, and there is no sound quality (some partially designed plastic speakers are far better than inferior wooden speakers); wooden speakers reduce the box resonance The resulting sound is generally better than the plastic speaker.

Usually multimedia speakers are dual-unit two-way design, one smaller speaker is responsible for the mid-highs output, and the other larger speaker is responsible for the mid-bass output.

The choice of speakers should consider the material of these two speakers: the high-powered unit of the multimedia active speaker is now dominated by the soft dome (in addition to the titanium dome for analog sources), and it can reduce the high frequency with the digital source. The hard feeling of the signal gives a gentle, smooth and delicate feeling. Multimedia speakers are now dominated by soft ball tops such as better quality silk films and lower cost PV films.

The woofer unit determines the characteristics of the sound of the speaker, and the selection is relatively important. The most common ones are the following: paper cones, plastic paper cones, paper-based wool basins, and tight pressing basins.

The existing in-vehicle electronic horn lacks the auxiliary functions related to police operations and cannot liberate police officers from the complicated criminal search operations. In order to overcome the above deficiencies, the present invention constructs a light column projection type electronic horn for solving the above technical problems.

1 is a block diagram showing the structure of a light column projection type electronic horn according to an embodiment of the present invention, the system including a light column projection device, an electronic horn main body, and a CORTEX-A15 processing chip, the electronic horn main body including T iron, magnetic steel, Watts, basins, elastic waves, voice coils, skeletons, split rings, cones and dust caps, when the horn is placed horizontally and facing the right side, the T iron, the magnetic steel, the hua The shelf, the elastic wave, the voice coil, the skeleton, the split ring, the cone and the dust cover are horizontally placed from left to right;

Wherein the CORTEX-A15 processing chip and the beam projection device are disposed on the skeleton, and the CORTEX-A15 processing chip is connected to the beam projection device for controlling projection of the beam projection device Direction and projection intensity.

Next, the specific structure of the optical column projection type electronic horn of the present invention will be further described.

In the light column projection type electronic horn, the light column projection device and the electronic horn main body are both disposed on a roof of a vehicle, and the light column projection device uses a cold light source to perform light column projection.

The light column projection type electronic horn further includes: a switch driving device disposed in the front panel of the vehicle and connected to the electronic horn main body for opening the electronic horn main body to perform sound when receiving the opening driving signal The playing is also used to close the electronic horn main body to stop the sound playing when the driving signal is turned off.

In the light column projection type electronic horn: the CORTEX-A15 processing chip is disposed at The front end of the vehicle is in the instrument panel and is connected to the switch drive device.

The light column projection type electronic horn further includes:

An automatic protection device, comprising a vibration sensor, connected to the electronic horn body for detecting a vibration value at the main body of the electronic horn, and when the vibration value at the main body of the electronic horn is greater than or equal to a preset vibration threshold, the control center The main body of the electronic horn plays the siren sound;

The light intensity detecting device is disposed on a roof of the vehicle for detecting an intensity of the illumination light outside the vehicle to output a real-time light intensity;

The light intensity change rate detecting device is connected to the light intensity detecting device and configured to detect a change rate of the real-time light intensity. When the rate of change of the real-time light intensity is greater than or equal to the preset change rate threshold, the signal with a high rate of change is issued, otherwise , issuing a normal rate of change signal;

An adaptive sensing device is disposed on the dust cover of the electronic horn main body and connected to the light intensity change rate detecting device for collecting video data of the surrounding environment of the vehicle to output an environmental video composed of multi-frame high-definition images. flow;

The adaptive sensing device includes a pixel data reading device and each pixel data acquiring device, and each pixel data acquiring device includes a plurality of parallel CCD sensing units, each pixel is received when the rate of change normal signal is received. The data acquisition device uses only data sensed by one of the plurality of CCD sensing units connected in parallel and outputs, and when receiving the signal with excessive rate of change, each pixel data acquisition device will be connected in parallel The data sensed by the CCD sensing unit is combined and outputted, and the pixel data reading device is respectively connected to each pixel data acquiring device for respectively reading out the data output by each pixel data acquiring device as the pixel value of each pixel. The pixel values of the respective pixels constitute a high-definition image of one frame;

An initial modeling device is connected to the adaptive sensing device, performs median filtering of a 5 pixel×5 pixel filtering template on the first frame image of the ambient video stream, acquires a median filtered image, and filters the median value The image is output as an initialized background image;

The background update device receives, for each new frame image of the environment video stream, each pixel in the new one frame image as the target pixel, and performs the following processing: the pixel value of the target pixel and the pixel of the corresponding position pixel in the background image. The value is matched. If the matching is successful, the target pixel is used as the background point. If the matching fails, the target pixel is used as the non-background point. In the statistical environment video stream previous image, the pixel corresponding to the target pixel is determined as the background point. Probability, when the probability is greater than or equal to the preset probability threshold, the latest position of the corresponding pixel in the previous image is used Determining, as a pixel value of the background point, updating a pixel value at a position corresponding to the target pixel in the background image; the background updating device outputs the updated background image after performing the above processing on the last pixel in the new one frame image ;

a foreground segmentation device, coupled to the background update device, for subtracting a new one frame image of the environment video stream from the background image of the new frame image updated by the background update device based on the environment video stream to obtain a foreground image An image output; a binarization processing device, coupled to the foreground segmentation device, configured to receive the foreground image, perform binarization processing on the foreground image to obtain a binarized image;

a human body detecting device, coupled to the binarization processing device, configured to receive the binarized image, and perform recognition based on a preset human motion trajectory on the target in the binarized image to determine the binary value Generating a human body target in the image, and outputting a human body image corresponding to the human body target and segmented from the binarized image;

a facial recognition device, coupled to the human body detecting device, for identifying facial features in the human sub-image, matching facial features in the human sub-image with criminal facial features, and successfully matching, outputting a criminal detection signal And determining the pitch angle and the azimuth angle based on a relative position of the human sub-image in the binarized image; otherwise, issuing a non-criminal signal;

The CORTEX-A15 processing chip is coupled to the facial recognition device for opening the light column projection device upon receiving the criminal detection signal, and transmitting a projection direction including the elevation angle and the azimuth angle Projecting the light column to the device;

Wherein the CORTEX-A15 processing chip further determines a real-time distance of the human sub-image corresponding to the human body target distance from the adaptive sensing device based on a depth of field of the human sub-image in the binarized image; the CORTEX The A15 processing chip controls the projection intensity of the projection beam of the light column projection device based on the real-time distance.

In the light column projection type electronic horn: the CORTEX-A15 processing chip turns off the light column projection device when receiving the sinless signal.

The light column projection type electronic horn further includes: a wireless communication device connected to the CORTEX-A15 processing chip, configured to download the latest criminal face from the remote police monitoring center server upon receiving the criminal detection signal Features are forwarded to the facial recognition device by the CORTEX-A15 processing chip.

The light column projection type electronic horn further includes: an environmental parameter collecting device disposed at a top of the vehicle and in the vicinity of the adaptive sensing device, configured to collect ambient light brightness in the vicinity of the adaptive sensing device as current brightness Output.

In the light column projection type electronic horn: the adaptive sensing device includes a flash device for receiving the current brightness and adjusting a flash intensity of the flash device based on the current brightness.

In addition, the median filter has a good filtering effect on the impulse noise, especially when filtering out the noise, and can protect the edge of the signal from being blurred. These excellent characteristics are not available in linear filtering methods. In addition, the median filtering algorithm is relatively simple and easy to implement in hardware. Therefore, once the median filtering method is proposed, it will be used in digital signal processing.

Median filtering is a nonlinear signal processing technique based on the theory of sorting statistics that can effectively suppress noise. The basic principle of median filtering is to use the value of a point in a digital image or a sequence of numbers in a neighborhood value of the point. The median value is substituted so that the surrounding pixel values are close to the true value, thus eliminating isolated noise points. The method uses a two-dimensional sliding template of a certain structure to sort the pixels in the panel according to the size of the pixel value, and generates a monotonically rising (or falling) two-dimensional data sequence. The two-dimensional median filter output is g(x, y)=med{f(xk, yl), (k, l∈W)}, where f(x, y), g(x, y) are original Image and processed image. W is a two-dimensional template, usually 3*3, 5*5 area, or different shapes, such as a line, a circle, a cross, a ring, and the like.

By adopting the optical column projection type electronic horn of the invention, the technical problem that the in-vehicle electronic horn is difficult to participate in the policing work in the prior art is integrated, and the plurality of targeted and high-precision images are integrated by modifying the hardware structure of the existing electronic horn. The collection device and the image recognition device identify nearby criminals, and when the criminals are identified, the light column is used for directional projection, thereby helping the police officers to search for street criminals and improving their intelligence level.

It is to be understood that while the invention has been described above in the preferred embodiments, the embodiments are not intended to limit the invention. For those skilled in the art, many possible variations and modifications may be made to the technical solutions of the present invention, or modified to equivalent changes, etc., without departing from the scope of the present invention. Effective embodiment. Therefore, any simple modifications, equivalent changes, and modifications of the above embodiments may be made without departing from the spirit and scope of the invention.

Claims (9)

  1. A light column projection type electronic horn includes a light column projection device, an electronic horn main body and a CORTEX-A15 processing chip, and the electronic horn main body includes a T iron, a magnetic steel, a washer, a basin frame, a spring wave, a voice coil, a skeleton, and a disassembly a ring, a cone and a dust cover, the T-iron, the magnet, the washer, the basin, the elastic wave, the sound when the horn is horizontally placed and facing the right side a ring, the skeleton, the split ring, the cone and the dust cover are horizontally placed from left to right, and the CORTEX-A15 processing chip and the light column projection device are disposed on the skeleton. The CORTEX-A15 processing chip is coupled to the beam projection device for controlling a projection direction and a projection intensity of the projection column of the column projection device.
  2. The optical column projection type electronic horn according to claim 1, wherein:
    The light column projection device and the electronic horn body are both disposed on a roof of the vehicle, and the light column projection device uses a cold light source to perform light column projection.
  3. The optical column projection type electronic horn according to claim 2, further comprising:
    a switch driving device disposed in the front panel of the vehicle and connected to the electronic horn main body for opening the electronic horn main body for sound playback when receiving an open driving signal, and for receiving a shutdown drive When the signal is signaled, the electronic horn body is turned off to stop the sound playback.
  4. The optical column projection type electronic horn according to claim 3, wherein:
    The CORTEX-A15 processing chip is disposed in a front panel of the vehicle and connected to the switch driving device.
  5. The optical column projection type electronic horn according to claim 4, further comprising:
    An automatic protection device, comprising a vibration sensor, connected to the electronic horn body for detecting a vibration value at the main body of the electronic horn, and when the vibration value at the main body of the electronic horn is greater than or equal to a preset vibration threshold, the control center The main body of the electronic horn plays the siren sound;
    The light intensity detecting device is disposed on a roof of the vehicle for detecting illumination outside the vehicle Light intensity to output real-time light intensity;
    The light intensity change rate detecting device is connected to the light intensity detecting device and configured to detect a change rate of the real-time light intensity. When the rate of change of the real-time light intensity is greater than or equal to the preset change rate threshold, the signal with a high rate of change is issued, otherwise , issuing a normal rate of change signal;
    An adaptive sensing device is disposed on the dust cover of the electronic horn main body and connected to the light intensity change rate detecting device for collecting video data of the surrounding environment of the vehicle to output an environmental video composed of multi-frame high-definition images. flow;
    The adaptive sensing device includes a pixel data reading device and each pixel data acquiring device, and each pixel data acquiring device includes a plurality of parallel CCD sensing units, each pixel is received when the rate of change normal signal is received. The data acquisition device uses only data sensed by one of the plurality of CCD sensing units connected in parallel and outputs, and when receiving the signal with excessive rate of change, each pixel data acquisition device will be connected in parallel The data sensed by the CCD sensing unit is combined and outputted, and the pixel data reading device is respectively connected to each pixel data acquiring device for respectively reading out the data output by each pixel data acquiring device as the pixel value of each pixel. The pixel values of the respective pixels constitute a high-definition image of one frame;
    An initial modeling device is connected to the adaptive sensing device, performs median filtering of a 5 pixel×5 pixel filtering template on the first frame image of the ambient video stream, acquires a median filtered image, and filters the median value The image is output as an initialized background image;
    The background update device receives, for each new frame image of the environment video stream, each pixel in the new one frame image as the target pixel, and performs the following processing: the pixel value of the target pixel and the pixel of the corresponding position pixel in the background image. The value is matched. If the matching is successful, the target pixel is used as the background point. If the matching fails, the target pixel is used as the non-background point. In the statistical environment video stream previous image, the pixel corresponding to the target pixel is determined as the background point. a probability that, when the probability is greater than or equal to the preset probability threshold, the pixel value at the corresponding position of the target pixel in the background image is updated by using the pixel value of the latest image determined as the background point in the corresponding position of the target pixel in the previous image; After the device performs the above processing on the last pixel in the new one frame image, the device outputs the updated background image;
    a foreground segmentation device, coupled to the background update device, for subtracting a new one frame image of the environment video stream from the background image of the new frame image updated by the background update device based on the environment video stream to obtain a foreground image Image output
    a binarization processing device, coupled to the foreground segmentation device, configured to receive the foreground image, perform binarization processing on the foreground image to obtain a binarized image;
    a human body detecting device, coupled to the binarization processing device, configured to receive the binarized image, and perform recognition based on a preset human motion trajectory on the target in the binarized image to determine the binary value Generating a human body target in the image, and outputting a human body image corresponding to the human body target and segmented from the binarized image;
    a facial recognition device, coupled to the human body detecting device, for identifying facial features in the human sub-image, matching facial features in the human sub-image with criminal facial features, and successfully matching, outputting a criminal detection signal And determining the pitch angle and the azimuth angle based on a relative position of the human sub-image in the binarized image; otherwise, issuing a non-criminal signal;
    The CORTEX-A15 processing chip is coupled to the facial recognition device for opening the light column projection device upon receiving the criminal detection signal, and transmitting a projection direction including the elevation angle and the azimuth angle Projecting the light column to the device;
    The CORTEX-A15 processing chip further determines a real-time distance of the human sub-image corresponding to the human target from the adaptive sensing device based on a depth of field of the human sub-image in the binarized image;
    Wherein, the CORTEX-A15 processing chip controls the projection intensity of the light beam projected by the light column projection device based on the real-time distance.
  6. The optical column projection type electronic horn according to claim 5, wherein:
    The CORTEX-A15 processing chip turns off the light column projection device upon receiving the non-criminal signal.
  7. The optical column projection type electronic horn according to claim 6, further comprising:
    a wireless communication device coupled to the CORTEX-A15 processing chip for downloading the latest criminal facial features from a remote police monitoring center server upon receipt of the criminal detection signal for processing by the CORTEX-A15 The chip is forwarded to the facial recognition device.
  8. The optical column projection type electronic horn according to claim 7, further comprising:
    An environmental parameter collecting device is disposed at the top of the vehicle and in the vicinity of the adaptive sensing device for collecting ambient light brightness in the vicinity of the adaptive sensing device as a current brightness output.
  9. The optical column projection type electronic horn according to claim 8, wherein:
    The adaptive sensing device includes a flash device for receiving the current brightness and adjusting a flash intensity of the flash device based on the current brightness.
PCT/CN2017/091155 2017-06-06 2017-06-30 Light pillar projection type electronic loudspeaker WO2018223462A1 (en)

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CN201710419086.5 2017-06-06
CN201710419086.5A CN107396255A (en) 2017-06-06 2017-06-06 Light beam porjection type electronic horn

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PCT/CN2017/091155 WO2018223462A1 (en) 2017-06-06 2017-06-30 Light pillar projection type electronic loudspeaker

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