CN113048906B - Passive content acquisition system based on amplitude analysis - Google Patents
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- G—PHYSICS
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- G06V20/58—Recognition of moving objects or obstacles, e.g. vehicles or pedestrians; Recognition of traffic objects, e.g. traffic signs, traffic lights or roads
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Abstract
The invention relates to a passive content acquisition system based on amplitude analysis, which comprises: the line positioning mechanism consists of a plurality of fixing rods and a single steel wire, wherein the fixing rods are uniformly spaced, the fixing rods are used for fixing the steel wire, and the steel wire is arranged in parallel with the left side or the right side of the expressway; the real-time driving device comprises a plurality of audio detection units and a single field driving unit, wherein each audio detection unit is arranged on a corresponding fixed rod and used for detecting the amplitude of the vehicle sounding component nearby, and the field driving unit is used for moving to the position of the audio detection unit which detects the vehicle sounding component with the maximum amplitude. The passive content acquisition system based on the amplitude analysis has simple structure and effective monitoring. The license plate of the large truck which is forbidden to pass in the forbidden time period can be identified for the expressway with the maximum vehicle sound amplitude, so that unmanned monitoring of the forbidden truck is realized.
Description
Technical Field
The invention relates to the field of signal processing, in particular to a passive content acquisition system based on amplitude analysis.
Background
Signal processing is the general term for processing various types of electrical signals for various intended purposes and requirements. The processing of analog signals is referred to as analog signal processing, and the processing of digital signals is referred to as digital signal processing. Signal processing is a process of processing a signal recorded on a certain medium to extract useful information, and is a general term for processing processes of extracting, transforming, analyzing, synthesizing, and the like of the signal.
One processes the signal in order to utilize it. For example, when the electrical signal is weak, it needs to be amplified; when noise is mixed, the noise needs to be filtered; when the frequency is not suitable for transmission, modulation and demodulation are needed; when the signal is distorted, the signal needs to be balanced; when the signal types are many, identification and the like are required.
The physicochemical or mathematical processes associated with the signal are: signal generation, signal transmission, signal reception, signal analysis (i.e., knowing the characteristics of a certain signal), signal processing (i.e., converting a certain signal into another signal related to the certain signal, such as filtering out noise or interference, and converting the signal into a form that is easy to analyze and recognize), signal storage, signal detection and control, and the like. These signal-related processes may also be referred to collectively as signal processing.
Disclosure of Invention
The invention has at least the following two key points:
(1) in order to reduce the number of monitoring parts along the line, a line positioning mechanism with a targeted structure is adopted to help a passive snapshot mechanism to move to a highway position with the maximum vehicle sound amplitude so as to acquire field data;
(2) and identifying whether the large truck which is forbidden to pass exists in the forbidden time period or not at the expressway with the maximum vehicle sound amplitude, thereby realizing the unmanned monitoring of the forbidden trucks.
According to an aspect of the present invention, there is provided a passive content acquisition system based on amplitude analysis, the system comprising:
the line positioning mechanism is arranged in a fixed area range along the line of the highway and consists of a plurality of fixed rods which are evenly spaced and a single steel wire.
More specifically, in the passive content acquisition system based on amplitude analysis according to the present invention:
the fixing rods are used for fixing the steel wire, and the steel wire is arranged on the left side or the right side of the expressway in parallel.
More specifically, the passive content collection system based on amplitude analysis according to the present invention further comprises:
the field projection mechanism is connected with the real-time driving equipment and is used for receiving the current working state of the real-time driving equipment and carrying out projection display on the current working state of the real-time driving equipment;
the field projection mechanism is also connected with the mobile holder and is used for displaying the current working state of the mobile holder in a projection manner;
the real-time driving device comprises a plurality of audio detection units and a single field driving unit, wherein each audio detection unit is arranged on a corresponding fixed rod and used for detecting the amplitude of the vehicle sounding component nearby the audio detection unit, and the field driving unit is respectively connected with the plurality of audio detection units and used for moving to the position of the audio detection unit which detects the vehicle sounding component with the maximum amplitude;
the mobile holder is fixed above the field driving unit and used for fixing the passive snapshot mechanism above the field driving unit;
the passive snapshot mechanism is used for executing snapshot operation on the highway scene when the current movement amount of the passive snapshot mechanism is smaller than the movement amount threshold value so as to obtain a corresponding highway snapshot image;
the passive snapshot mechanism comprises a movement detection unit, an MCU control unit, an image sensing unit and a data output unit, wherein the movement detection unit is used for detecting the current movement amount of the passive snapshot mechanism;
the cloud storage mechanism is used for storing the outline of various large trucks which are forbidden to pass in advance;
the time identification device is used for identifying whether the current time period belongs to the time period of the no-passing highway of the large truck, and when the current time period belongs to the time period, a first identification command is sent out, and when the current time period does not belong to the time period, a second identification command is sent out;
the appearance detection equipment is connected with the cloud storage mechanism through a network and is also electrically connected with the time identification equipment and the passive snapshot mechanism respectively;
the appearance detection equipment is used for starting the identification of the appearance outline of the large truck which is forbidden to pass in the road snapshot image when receiving the first identification command, so that the license plate number in the identified image area is output as the number of the illegal truck when the identification is finished;
and the data reporting mechanism is connected with the appearance detection equipment, is also connected with a far-end traffic violation server through a network, and is used for reporting the identified numbers of the violation trucks to the traffic violation server.
The passive content acquisition system based on the amplitude analysis has simple structure and effective monitoring. The license plate of the large truck which is forbidden to pass in the forbidden time period can be identified for the expressway with the maximum vehicle sound amplitude, so that unmanned monitoring of the forbidden truck is realized.
Drawings
Embodiments of the invention will now be described with reference to the accompanying drawings, in which:
fig. 1 is a schematic structural diagram of a passive content acquisition system based on amplitude analysis according to an embodiment of the present invention.
Detailed Description
An embodiment of the amplitude analysis-based passive content acquisition system of the present invention will be described in detail below with reference to the accompanying drawings.
An expressway, referred to as a highway for short, is a highway dedicated for high-speed driving of automobiles. Highways have different regulations in different countries, times and scientific research and academic fields. According to the Standard for road engineering technology (JTG B01-2014): the highway is a multi-lane highway which is specially used for cars to drive in different directions and lanes and completely control the entrance and exit. The annual average daily designed traffic volume of the highway is preferably more than 15000 passenger cars, and the designed speed is 80-120 kilometers per hour.
Indeed, highways are a necessary product of socio-economic development:
1. the highway is suitable for the development of industrialization and urbanization. The city is an industrial and population gathering place, the automobile growth is far faster than the countryside, the city becomes an automobile gathering center, and the construction of the expressway is started from urban loops, radiation roads and busy road sections, and gradually becomes urban traffic taking the expressway as the backbone.
2. The development of automobile technology puts forward objective requirements on highway construction. The automobile becomes an important transportation means in human society, and infrastructures such as an expressway can be matched with two development trends of light weight and heavy load of the automobile, and meanwhile, the requirements of high speed of passenger automobiles and heavy load of freight automobiles are met.
3. The rapid development and urbanization advancement of the automotive industry have brought about opportunities for highway companies to develop. In areas with nervous railway transportation capacity and unsmooth access ways, the highway plays an important transportation role.
At present, many cities and areas have all restricted the travel time and the region of traveling of large truck to avoid producing the traffic accident, guarantee current efficiency, for example, generally arrange night time quantum and allow the city of large truck and the outlying highway in area to pass, all adopt artifical mode fixed point value to watch on at present, on the one hand, can't guarantee the comprehensiveness of control, on the other hand, the mode of artifical control has consumed a large amount of manpower resources.
In order to overcome the defects, the invention builds a passive content acquisition system based on amplitude analysis, and can effectively solve the corresponding technical problem.
Fig. 1 is a schematic structural diagram of a passive content acquisition system based on amplitude analysis according to an embodiment of the present invention, the system including:
the positioning mechanism along the line is arranged in the range of a fixed area along the line of the highway and consists of a plurality of fixed rods and a single steel wire at even intervals, the fixed rods are used for fixing the steel wire, and the steel wire is arranged in parallel with the left side or the right side of the highway;
the field projection mechanism is connected with the real-time driving equipment and is used for receiving the current working state of the real-time driving equipment and carrying out projection display on the current working state of the real-time driving equipment;
the field projection mechanism is also connected with the mobile holder and is used for displaying the current working state of the mobile holder in a projection manner;
the real-time driving device comprises a plurality of audio detection units and a single field driving unit, wherein each audio detection unit is arranged on a corresponding fixed rod and used for detecting the amplitude of the vehicle sounding component nearby the audio detection unit, and the field driving unit is respectively connected with the plurality of audio detection units and used for moving to the position of the audio detection unit which detects the vehicle sounding component with the maximum amplitude;
the mobile holder is fixed above the field driving unit and used for fixing the passive snapshot mechanism above the field driving unit;
the passive snapshot mechanism is used for executing snapshot operation on the highway scene when the current movement amount of the passive snapshot mechanism is smaller than the movement amount threshold value so as to obtain a corresponding highway snapshot image;
the passive snapshot mechanism comprises a movement detection unit, an MCU control unit, an image sensing unit and a data output unit, wherein the movement detection unit is used for detecting the current movement amount of the passive snapshot mechanism;
the cloud storage mechanism is used for storing the outline of various large trucks which are forbidden to pass in advance;
the time identification device is used for identifying whether the current time period belongs to the time period of the no-passing highway of the large truck, and when the current time period belongs to the time period, a first identification command is sent out, and when the current time period does not belong to the time period, a second identification command is sent out;
the appearance detection equipment is connected with the cloud storage mechanism through a network and is also electrically connected with the time identification equipment and the passive snapshot mechanism respectively;
the appearance detection equipment is used for starting the identification of the appearance outline of the large truck which is forbidden to pass in the road snapshot image when receiving the first identification command, so that the license plate number in the identified image area is output as the number of the illegal truck when the identification is finished;
and the data reporting mechanism is connected with the appearance detection equipment, is also connected with a far-end traffic violation server through a network, and is used for reporting the identified numbers of the violation trucks to the traffic violation server.
Next, the detailed structure of the amplitude analysis-based passive content acquisition system of the present invention will be further described.
In the amplitude analysis based passive content acquisition system:
the appearance detection device is further used for stopping the identification of the appearance outline of the large truck which is forbidden to pass in the road snapshot image when the second identification command is received.
In the passive content collection system based on amplitude analysis, further comprising:
and the parameter configuration interface is internally provided with an infrared receiving and transmitting unit and is used for receiving the configuration operation of working parameters of the passive snapshot mechanism, the real-time driving equipment and the line positioning mechanism by a worker through a wireless infrared communication link.
In the amplitude analysis based passive content acquisition system:
in the passive snapshot mechanism, the MCU control unit is respectively connected with the movement detection unit and the image sensing unit.
In the amplitude analysis based passive content acquisition system:
the MCU control unit is used for triggering the image sensing unit to execute snapshot operation on the highway site when the received current movement amount is smaller than the movement amount threshold value.
In the amplitude analysis based passive content acquisition system:
the data output unit is also connected with the image sensing unit and used for receiving and outputting the image sensing unit.
In the passive content collection system based on amplitude analysis, further comprising:
the bandwidth analysis equipment is connected with the output interface of the appearance detection equipment and is used for detecting the real-time output bandwidth of the appearance detection equipment;
the bandwidth analysis equipment is also used for sending a data loss early warning command when the detected real-time output bandwidth is larger than a preset bandwidth threshold;
and the bandwidth analysis equipment is also used for sending a data transmission reliable command when the detected real-time output bandwidth is less than or equal to the preset bandwidth threshold.
In the passive content collection system based on amplitude analysis, further comprising:
and the temperature sensing mechanism is arranged inside the time identification equipment and used for sensing the internal temperature of the time identification equipment.
In the amplitude analysis based passive content acquisition system:
the temperature sensing mechanism comprises first sensing equipment and is used for sensing and outputting the internal temperature of the time identification equipment;
the temperature sensing device further comprises a second sensing device for sensing and outputting the external temperature of the time identification device.
In the passive content collection system based on amplitude analysis, further comprising:
and the temperature difference analysis mechanism is respectively connected with the first sensing equipment and the second sensing equipment and is used for determining whether to execute an alarm action related to overlarge temperature difference or not based on the difference between the internal temperature and the external temperature of the time identification equipment.
In addition, in the passive content collection system based on amplitude analysis, a Micro Control Unit (MCU), also called a Single Chip Microcomputer (Single Chip Microcomputer) or a Single Chip Microcomputer, properly reduces the frequency and specification of a Central Processing Unit (CPU), and integrates peripheral interfaces such as a memory, a counter (Timer), a USB, an a/D conversion, a UART, a PLC, a DMA, and even an LCD driving circuit on a Single Chip to form a Chip-level computer, which performs different combination control for different application occasions. Such as mobile phones, PC peripherals, remote controls, to automotive electronics, industrial stepper motors, robotic arm controls, etc., see the silhouette of the MCU. The 32-bit MCU can be said to be the mainstream of the MCU market, the price of a single MCU is between 1.5 and 4 dollars, the working frequency is mostly between 100 and 350MHz, the execution efficiency is better, and the application types are also multiple. However, the length of the program code with the same function of the 32-bit MCU is increased by 30-40% compared with the 8/16-bit MCU due to the increase of the operand and the length of the memory, which causes that the capacity of the embedded OTP/FlashROM memory cannot be too small, and the number of external pins of the chip is increased violently, thereby further limiting the cost reduction capability of the 32-bit MCU.
It is to be understood that while the present invention has been described in conjunction with the preferred embodiments thereof, it is not intended to limit the invention to those embodiments. It will be apparent to those skilled in the art from this disclosure that many changes and modifications can be made, or equivalents modified, in the embodiments of the invention without departing from the scope of the invention. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention are still within the scope of the protection of the technical solution of the present invention, unless the contents of the technical solution of the present invention are departed.
Claims (8)
1. A passive content collection system based on amplitude analysis, comprising:
the line positioning mechanism is arranged in a fixed area range along the line of the highway and consists of a plurality of fixed rods which are uniformly spaced and a single steel wire;
the fixing rods are used for fixing the steel wire, and the steel wire is arranged on the left side or the right side of the expressway in parallel;
the field projection mechanism is connected with the real-time driving equipment and is used for receiving the current working state of the real-time driving equipment and carrying out projection display on the current working state of the real-time driving equipment;
the field projection mechanism is also connected with the mobile holder and is used for displaying the current working state of the mobile holder in a projection manner;
the real-time driving device comprises a plurality of audio detection units and a single field driving unit, wherein each audio detection unit is arranged on a corresponding fixed rod and used for detecting the amplitude of the vehicle sounding component nearby the audio detection unit, and the field driving unit is respectively connected with the plurality of audio detection units and used for moving to the position of the audio detection unit which detects the vehicle sounding component with the maximum amplitude;
the mobile holder is fixed above the field driving unit and used for fixing the passive snapshot mechanism above the field driving unit;
the passive snapshot mechanism is used for executing snapshot operation on the highway scene when the current movement amount of the passive snapshot mechanism is smaller than the movement amount threshold value so as to obtain a corresponding highway snapshot image;
the passive snapshot mechanism comprises a movement detection unit, an MCU control unit, an image sensing unit and a data output unit, wherein the movement detection unit is used for detecting the current movement amount of the passive snapshot mechanism;
the cloud storage mechanism is used for storing the outline of various large trucks which are forbidden to pass in advance;
the time identification device is used for identifying whether the current time period belongs to the time period of the no-passing highway of the large truck, and when the current time period belongs to the time period, a first identification command is sent out, and when the current time period does not belong to the time period, a second identification command is sent out;
the appearance detection equipment is connected with the cloud storage mechanism through a network and is also electrically connected with the time identification equipment and the passive snapshot mechanism respectively;
the appearance detection equipment is used for starting the identification of the appearance outline of the large truck which is forbidden to pass in the road snapshot image when receiving the first identification command, so that the license plate number in the identified image area is output as the number of the illegal truck when the identification is finished;
the data reporting mechanism is connected with the appearance detection equipment, is also connected with a far-end traffic violation server through a network and is used for reporting the number of each identified violation truck to the traffic violation server;
the parameter configuration interface is internally provided with an infrared receiving and transmitting unit and is used for receiving configuration operation of working parameters of the passive snapshot mechanism, the real-time driving equipment and the line positioning mechanism by a worker through a wireless infrared communication link;
wherein the appearance detection device is further configured to stop the identification of the appearance outline of the no-passing large truck in the road snapshot image when the second recognition command is received.
2. The amplitude analysis based passive content acquisition system of claim 1, wherein:
in the passive snapshot mechanism, the MCU control unit is respectively connected with the movement detection unit and the image sensing unit.
3. A passive content acquisition system based on amplitude analysis according to claim 2, characterized in that:
the MCU control unit is used for triggering the image sensing unit to execute snapshot operation on the highway site when the received current movement amount is smaller than the movement amount threshold value.
4. A passive content acquisition system based on amplitude analysis according to claim 3, characterized in that:
the data output unit is also connected with the image sensing unit and used for receiving and outputting the image sensing unit.
5. The amplitude analysis based passive content acquisition system of claim 4, further comprising:
the bandwidth analysis equipment is connected with the output interface of the appearance detection equipment and is used for detecting the real-time output bandwidth of the appearance detection equipment;
the bandwidth analysis equipment is also used for sending a data loss early warning command when the detected real-time output bandwidth is larger than a preset bandwidth threshold;
and the bandwidth analysis equipment is also used for sending a data transmission reliable command when the detected real-time output bandwidth is less than or equal to the preset bandwidth threshold.
6. The amplitude analysis based passive content acquisition system of claim 5, further comprising:
and the temperature sensing mechanism is arranged inside the time identification equipment and used for sensing the internal temperature of the time identification equipment.
7. The amplitude analysis based passive content acquisition system of claim 6, wherein:
the temperature sensing mechanism comprises first sensing equipment and is used for sensing and outputting the internal temperature of the time identification equipment;
the temperature sensing device further comprises a second sensing device for sensing and outputting the external temperature of the time identification device.
8. The amplitude analysis based passive content acquisition system of claim 7, further comprising:
and the temperature difference analysis mechanism is respectively connected with the first sensing equipment and the second sensing equipment and is used for determining whether to execute an alarm action related to overlarge temperature difference or not based on the difference between the internal temperature and the external temperature of the time identification equipment.
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