CN110763756B - State switching system based on ultrasonic measurement big data and corresponding terminal - Google Patents
State switching system based on ultrasonic measurement big data and corresponding terminal Download PDFInfo
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- CN110763756B CN110763756B CN201911026466.8A CN201911026466A CN110763756B CN 110763756 B CN110763756 B CN 110763756B CN 201911026466 A CN201911026466 A CN 201911026466A CN 110763756 B CN110763756 B CN 110763756B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/02—Analysing fluids
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T7/00—Image analysis
- G06T7/10—Segmentation; Edge detection
- G06T7/11—Region-based segmentation
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T7/00—Image analysis
- G06T7/90—Determination of colour characteristics
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/02—Indexing codes associated with the analysed material
- G01N2291/021—Gases
- G01N2291/0215—Mixtures of three or more gases, e.g. air
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T2207/00—Indexing scheme for image analysis or image enhancement
- G06T2207/10—Image acquisition modality
- G06T2207/10004—Still image; Photographic image
Abstract
The invention relates to a state switching system based on ultrasonic measurement big data and a corresponding terminal, comprising: the ultrasonic measuring instrument is arranged at the front end of the vehicle and comprises an ultrasonic transmitter, an ultrasonic receiver and a signal processor; the button type acquisition equipment is used for acquiring image data in front of the vehicle so as to obtain and output a corresponding instant acquisition image; the signal processor is also connected with the button type acquisition equipment and is used for sending a first driving command when the measured front vehicle distance is lower than a preset length threshold; and the button type acquisition equipment is connected with the signal processor and is used for entering a working state when receiving a first driving command. The state switching system based on the ultrasonic measurement big data and the corresponding terminal are intelligent in control and wide in application. The speed reduction and the speed reduction range of the vehicle can be determined based on whether the front vehicle starts the wiper dirt removing equipment, so that the pollution range caused by water spraying of the front vehicle on the vehicle can be reduced.
Description
Technical Field
The invention relates to the field of ultrasonic measurement, in particular to a state switching system based on ultrasonic measurement big data and a corresponding terminal.
Background
The propagation law of the ultrasonic wave in the medium such as reflection, refraction, diffraction, scattering and the like is not essentially different from the propagation law of the audible sound wave. But the wavelength of the ultrasonic waves is very short, only a few centimeters or even a few thousandths of a millimeter.
Compared to audible sound waves, ultrasonic waves have many unusual characteristics: in the aspect of propagation characteristics, the ultrasonic wave has a short wavelength, and the size of a general obstacle is many times larger than the wavelength of the ultrasonic wave, so that the diffraction power of the ultrasonic wave is poor, the ultrasonic wave can directionally propagate in a straight line in a uniform medium, and the characteristics are more remarkable the shorter the wavelength of the ultrasonic wave is. In terms of power characteristics, when sound propagates in air, particles in the air are pushed to vibrate back and forth to do work on the particles. The sound wave power is a physical quantity representing how fast the sound wave works. At the same intensity, the higher the frequency of the sound wave, the greater the power it has. Since the ultrasonic wave has a high frequency, its power is very large compared to a general sound wave. In the aspect of cavitation, when the ultrasonic waves have an alternating period of positive and negative pressure in the transmission process of the medium, the ultrasonic waves extrude medium molecules in a positive pressure phase, so that the original density of the medium is changed and increased; in the negative pressure phase, the medium molecules are thinned and further dispersed, the density of the medium is reduced, and when ultrasonic waves with large enough amplitude act on the liquid medium, the average distance between the medium molecules exceeds the critical molecular distance which keeps the liquid medium unchanged, and the liquid medium is broken to form the micro-bubbles. These small voids rapidly expand and close, causing violent impact between the liquid particles, thereby creating pressures of several thousand to tens of thousands of atmospheres. The violent interaction between the particles can raise the temperature of the liquid suddenly to play a good role in stirring, so that two immiscible liquids (such as water and oil) are emulsified, the dissolution of a solute is accelerated, and a chemical reaction is accelerated. The various effects caused by the action of ultrasound in a liquid are known as cavitation of the ultrasound.
Disclosure of Invention
In order to solve the related technical problems in the prior art, the invention provides a state switching system based on ultrasonic measurement big data, which can judge that a front vehicle starts windshield wiper decontamination equipment when detecting that water mist in a certain distribution range exists in the front of the vehicle, thereby automatically executing speed reduction operation and avoiding the pollution of the vehicle body by the water mist; the deceleration amplitude of the vehicle is adjusted based on the distribution area of the water mist area, and the larger the distribution area of the water mist area is, the more violent the adjusted deceleration amplitude of the vehicle is; in addition, a water mist detection mechanism is started when the distance between the front vehicle and the front vehicle is too close, so that unnecessary waste of power resources is reduced.
According to an aspect of the present invention, there is provided a state switching system based on ultrasonic measurement big data, the system including:
the ultrasonic measuring instrument is arranged at the front end of a vehicle and comprises an ultrasonic transmitter, an ultrasonic receiver and a signal processor, wherein the signal processor is respectively connected with the ultrasonic transmitter and the ultrasonic receiver.
More specifically, in the ultrasonic measurement big data based state switching system, the system further includes:
and the button type acquisition equipment is used for acquiring image data in front of the vehicle so as to obtain and output a corresponding instant acquisition image.
More specifically, in the ultrasonic measurement big data based state switching system, the system further includes:
the signal processor is also connected with the button type acquisition equipment and is used for sending a first driving command when the measured front vehicle distance is lower than a preset length threshold value, and otherwise, sending a second driving command;
the button type acquisition equipment is connected with the signal processor and is used for entering a working state when receiving a first driving command and entering a dormant state when receiving a second driving command;
the tone detection device is connected with the button type acquisition device and used for receiving the instant acquisition image and detecting a background area in the instant acquisition image to obtain a tone value of the instant acquisition image;
the data correction device is connected with the tone detection device and used for executing tone reduction processing on the instant acquisition image when the detected tone value is greater than or equal to a preset tone threshold value so as to obtain a tone reduced image;
the data correction equipment is also used for directly outputting the instant acquisition image as a tone-reducing image when the detected tone value is smaller than the preset tone threshold value;
the water fog identification device is connected with the data correction device and used for identifying a water fog area in the tone-reduced image based on water fog imaging characteristics and sending a third driving command when the percentage of the water fog area occupying the tone-reduced image is larger than or equal to a preset percentage threshold value;
and the real-time deceleration device is connected with the water mist identification device and is used for adjusting the deceleration amplitude of the vehicle based on the percentage of the water mist area occupying the color tone reducing image when the third driving command is received.
According to another aspect of the present invention, there is also provided a status switching terminal based on ultrasonic measurement big data, the terminal comprising: a memory and a processor, the processor coupled to the memory; the memory for storing executable instructions of the processor; the processor is used for calling the executable instructions in the memory so as to realize the method for judging whether the front vehicle starts the wiper decontamination equipment or not based on the detection result of whether the water mist in a certain distribution range exists in the front of the vehicle or not by using the state switching system based on the ultrasonic measurement big data.
The state switching system based on the ultrasonic measurement big data and the corresponding terminal are intelligent in control and wide in application. The speed reduction and the speed reduction range of the vehicle can be determined based on whether the front vehicle starts the wiper dirt removing equipment, so that the pollution range caused by water spraying of the front vehicle on the vehicle can be reduced.
The invention needs to have the following three key invention points:
(1) when the water mist in a certain distribution range in front of the vehicle is detected, judging that the front vehicle starts a windshield wiper dirt removing device, so that the speed reduction operation is automatically executed, and the vehicle body is prevented from being polluted by the water mist;
(2) adjusting the deceleration amplitude of the vehicle based on the distribution area of the water mist area, wherein the larger the distribution area of the water mist area is, the more violent the adjusted deceleration amplitude of the vehicle is;
(3) and when the distance between the front vehicles is too close, a water mist detection mechanism is started, so that unnecessary waste of power resources is reduced.
Detailed Description
Embodiments of the ultrasonic measurement big data based state switching system and the corresponding terminal of the present invention will be described in detail below.
The safe vehicle distance is a necessary separation distance that the rear vehicle keeps from the front vehicle during traveling in order to avoid an accidental collision with the front vehicle. The safe distance has no absolute numerical concept, which is determined on a case-by-case basis. Generally, the faster the vehicle speed and the larger the vehicle weight, the longer the distance required for the safety distance. The safe distance may also be affected by many other factors, such as weather conditions, light intensity, driver vision, braking equipment, road conditions, etc.
According to the law of mechanics, the vehicle continues to move forward for a certain distance from moving to completely stationary. If the distance between the vehicle and the front vehicle is too close, the vehicle is easy to collide with the front vehicle, and a rear-end collision accident is caused. In order to ensure that the rear vehicle does not collide with the front vehicle in any extreme case, the rear vehicle needs to keep a certain distance with the front vehicle all the time so as to leave enough braking space (including braking time, braking distance, etc.) when an emergency occurs.
At present, when a vehicle which has just been washed goes out, if a front vehicle uses a wiper to perform a decontamination operation, the vehicle body is easily polluted by a muddy water mixture, and the washing of the vehicle becomes useless. In order to reduce the occurrence of such a situation, a mode of manual monitoring by the driver is generally adopted for manual deceleration, however, the manual monitoring mode inevitably causes distraction of the driver.
In order to overcome the defects, the invention builds a state switching system based on ultrasonic measurement big data and a corresponding terminal, and can effectively solve the corresponding technical problem.
The state switching system based on ultrasonic measurement big data shown according to the embodiment of the invention comprises:
the ultrasonic measuring instrument is arranged at the front end of a vehicle and comprises an ultrasonic transmitter, an ultrasonic receiver and a signal processor, wherein the signal processor is respectively connected with the ultrasonic transmitter and the ultrasonic receiver.
Next, a detailed configuration of the ultrasonic measurement big data based state switching system according to the present invention will be further described.
The state switching system based on the ultrasonic measurement big data can further comprise:
and the button type acquisition equipment is used for acquiring image data in front of the vehicle so as to obtain and output a corresponding instant acquisition image.
The state switching system based on the ultrasonic measurement big data can further comprise:
the signal processor is also connected with the button type acquisition equipment and is used for sending a first driving command when the measured front vehicle distance is lower than a preset length threshold value, and otherwise, sending a second driving command;
the button type acquisition equipment is connected with the signal processor and is used for entering a working state when receiving a first driving command and entering a dormant state when receiving a second driving command;
the tone detection device is connected with the button type acquisition device and used for receiving the instant acquisition image and detecting a background area in the instant acquisition image to obtain a tone value of the instant acquisition image;
the data correction device is connected with the tone detection device and used for executing tone reduction processing on the instant acquisition image when the detected tone value is greater than or equal to a preset tone threshold value so as to obtain a tone reduced image;
the data correction equipment is also used for directly outputting the instant acquisition image as a tone-reducing image when the detected tone value is smaller than the preset tone threshold value;
the water fog identification device is connected with the data correction device and used for identifying a water fog area in the tone-reduced image based on water fog imaging characteristics and sending a third driving command when the percentage of the water fog area occupying the tone-reduced image is larger than or equal to a preset percentage threshold value;
the real-time deceleration device is connected with the water mist identification device and used for adjusting the deceleration amplitude of the vehicle based on the percentage of the water mist area occupying the color tone reducing image when the third driving command is received;
the water fog identification device is further used for sending out a fourth driving command when the percentage of the water fog area occupying the reduced tone image is smaller than the preset percentage threshold value.
In the state switching system based on ultrasonic measurement big data:
the greater the percentage of the fog region occupying the degraded tone image, the more severe the magnitude of the deceleration of the vehicle is regulated.
The state switching system based on the ultrasonic measurement big data can further comprise:
and the self-adaptive processing device is connected with the data correction device and used for receiving the reduced tone image, identifying the content complexity of the reduced tone image, and performing region division operation on the reduced tone image based on the acquired content complexity to obtain each image region.
The state switching system based on the ultrasonic measurement big data can further comprise:
the first extraction device is connected with the self-adaptive processing device and used for receiving each image area of the reduced tone image, drawing an Archimedes curve with the lower right corner as a starting point in the reduced tone image and selecting each image area through which the Archimedes curve passes to be output as an image area to be analyzed;
and the second extraction equipment is connected with the first extraction equipment and used for sequencing the contrasts of all the image areas to be analyzed in the reduced tone image and outputting the contrast of the central serial number as a reference contrast.
The state switching system based on the ultrasonic measurement big data can further comprise:
a first processing device connected to the second extraction device, configured to perform contrast lifting processing on the reduced-tone image with the reference contrast as a contrast of the reduced-tone image, and obtain and output a first processed image;
and the second processing device is respectively connected with the water mist identification device and the first processing device and is used for executing nearest neighbor interpolation processing on the received first processing image to obtain a second processing image and sending the second processing image to the water mist identification device in place of the reduced-tone image.
The state switching system based on the ultrasonic measurement big data can further comprise:
identifying the content complexity of the reduced-tone image, and performing region division operation on the reduced-tone image based on the acquired content complexity comprises: obtaining each pixel value of each pixel point of the tone-reducing image, and performing duplication elimination processing on each pixel value to obtain the number of the pixel values after duplication elimination, wherein the content complexity of the tone-reducing image is in direct proportion to the number of the pixel values after duplication elimination;
wherein, in the adaptive processing apparatus, the lower the acquired content complexity, the smaller the number of respective image areas obtained by performing an area division operation on the reduced-tone image.
Meanwhile, in order to overcome the defects, the invention also builds a state switching terminal based on the ultrasonic measurement big data, and the terminal comprises: a memory and a processor, the processor coupled to the memory;
wherein the memory is used for storing executable instructions of the processor;
the processor is used for calling the executable instructions in the memory so as to realize the method for judging whether the front vehicle starts the wiper decontamination equipment or not based on the detection result of whether the water mist in a certain distribution range exists in the front of the vehicle or not by using the state switching system based on the ultrasonic measurement big data.
CP L D Complex Programmable logic Device is developed from PA L and GA L devices, and is a digital integrated circuit whose logic function can be built by user according to their own needs.
The CP L D is mainly composed of programmable logic Macro cells (MC, Macro cells) surrounding a programmable interconnection matrix unit, wherein the MC structure is complex and has a complex I/O unit interconnection structure, a specific circuit structure can be generated by a user according to needs to complete a certain function, and a logic circuit designed by the CP L D adopts metal wires with fixed length to interconnect each logic block, so that the logic circuit has time predictability and the defect of incomplete time sequence prediction of a segmented interconnection structure is avoided.
It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.
The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc. Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (7)
1. A state switching system based on big data of ultrasonic measurement, characterized by comprising:
the ultrasonic measuring instrument is arranged at the front end of the vehicle and comprises an ultrasonic transmitter, an ultrasonic receiver and a signal processor, and the signal processor is respectively connected with the ultrasonic transmitter and the ultrasonic receiver;
the button type acquisition equipment is used for acquiring image data in front of the vehicle so as to obtain and output a corresponding instant acquisition image;
the signal processor is also connected with the button type acquisition equipment and is used for sending a first driving command when the measured front vehicle distance is lower than a preset length threshold value, and otherwise, sending a second driving command;
the button type acquisition equipment is connected with the signal processor and is used for entering a working state when receiving a first driving command and entering a dormant state when receiving a second driving command;
the tone detection device is connected with the button type acquisition device and used for receiving the instant acquisition image and detecting a background area in the instant acquisition image to obtain a tone value of the instant acquisition image;
the data correction device is connected with the tone detection device and used for executing tone reduction processing on the instant acquisition image when the detected tone value is greater than or equal to a preset tone threshold value so as to obtain a tone reduced image;
the data correction equipment is also used for directly outputting the instant acquisition image as a tone-reducing image when the detected tone value is smaller than the preset tone threshold value;
the water fog identification device is connected with the data correction device and used for identifying a water fog area in the tone-reduced image based on water fog imaging characteristics and sending a third driving command when the percentage of the water fog area occupying the tone-reduced image is larger than or equal to a preset percentage threshold value;
the real-time deceleration device is connected with the water mist identification device and used for adjusting the deceleration amplitude of the vehicle based on the percentage of the water mist area occupying the color tone reducing image when the third driving command is received;
the water fog identification device is further used for sending out a fourth driving command when the percentage of the water fog area occupying the reduced tone image is smaller than the preset percentage threshold value.
2. The ultrasonic measurement big data-based state switching system according to claim 1, wherein:
the greater the percentage of the fog region occupying the degraded tone image, the more severe the magnitude of the deceleration of the vehicle is regulated.
3. The ultrasonic measurement big data-based state switching system according to claim 2, wherein the system further comprises:
and the self-adaptive processing device is connected with the data correction device and used for receiving the reduced tone image, identifying the content complexity of the reduced tone image, and performing region division operation on the reduced tone image based on the acquired content complexity to obtain each image region.
4. The ultrasonic measurement big data-based state switching system according to claim 3, wherein the system further comprises:
the first extraction device is connected with the self-adaptive processing device and used for receiving each image area of the reduced tone image, drawing an Archimedes curve with the lower right corner as a starting point in the reduced tone image and selecting each image area through which the Archimedes curve passes to be output as an image area to be analyzed;
and the second extraction equipment is connected with the first extraction equipment and used for sequencing the contrasts of all the image areas to be analyzed in the reduced tone image and outputting the contrast of the central serial number as a reference contrast.
5. The ultrasonic measurement big data-based state switching system according to claim 4, wherein the system further comprises:
a first processing device connected to the second extraction device, configured to perform contrast lifting processing on the reduced-tone image with the reference contrast as a contrast of the reduced-tone image, and obtain and output a first processed image;
and the second processing device is respectively connected with the water mist identification device and the first processing device and is used for executing nearest neighbor interpolation processing on the received first processing image to obtain a second processing image and sending the second processing image to the water mist identification device in place of the reduced-tone image.
6. The ultrasonic measurement big data-based state switching system according to claim 5, wherein the system further comprises:
identifying the content complexity of the reduced-tone image, and performing region division operation on the reduced-tone image based on the acquired content complexity comprises: obtaining each pixel value of each pixel point of the tone-reducing image, and performing duplication elimination processing on each pixel value to obtain the number of the pixel values after duplication elimination, wherein the content complexity of the tone-reducing image is in direct proportion to the number of the pixel values after duplication elimination;
wherein, in the adaptive processing apparatus, the lower the acquired content complexity, the smaller the number of respective image areas obtained by performing an area division operation on the reduced-tone image.
7. A state switching terminal based on ultrasonic measurement big data is characterized in that the terminal comprises: a memory and a processor, the processor coupled to the memory;
the memory for storing executable instructions of the processor;
the processor is used for calling the executable instructions in the memory to realize the method for judging whether the front vehicle activates the wiper blade decontamination apparatus or not based on the detection result of whether the water fog exists in the front of the vehicle or not according to any one of the claims 1-6.
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