View blind area monitoring system based on optical fiber transmission

Abstract

The utility model provides a visual field blind area monitoring system based on optical fiber transmission, the visual field blind area monitoring system comprises an acquisition module, a transmission module, a processing module and an early warning module, the visual field blind area image data is acquired in real time, the acquired image data is converted into an electric signal, the electric signal is converted into an optical signal, and the optical signal is transmitted by an optical fiber; the optical fiber is used for transmitting the information of the view blind area, high-bandwidth, low-delay and long-distance information transmission is kept, data loss and transmission errors are reduced, the stability and reliability of the view blind area monitoring system are improved, the traffic accident risk is reduced, and the driving safety is improved.

Description

Technical Field

[0001] This utility model relates to the field of vehicle technology, and in particular to a blind spot monitoring system based on fiber optic transmission. Background Technology

[0002] With the increasing prevalence of automobiles, safe driving is becoming increasingly important, especially for trucks. Due to their large size and complex structure, trucks have more blind spots than smaller cars, particularly on the sides and rear of the cab. These blind spots may prevent drivers from seeing pedestrians, bicycles, or other vehicles in time, increasing the risk of traffic accidents. Statistics show that a significant number of traffic accidents caused by truck blind spots occur annually, resulting in substantial economic losses and personal injuries. To improve truck safety and reduce accidents caused by blind spots, more and more trucks are being equipped with blind spot monitoring systems. Existing blind spot monitoring systems typically include cameras, sensors, and a central processing unit (CPU). Most use wired transmission methods such as CAN and Ethernet. While wired transmission can meet basic data transmission needs, it often suffers from insufficient bandwidth when transmitting high-definition video streams, leading to decreased image quality and transmission delays, affecting the system's accuracy and reliability. Furthermore, wired transmission has limited transmission distances, especially in large trucks where the distance between the camera and CPU is considerable. Traditional wired transmission methods are ill-suited for long-distance transmission. Additionally, traditional wired transmission is susceptible to electromagnetic interference, causing unstable data transmission and even data loss or errors. Therefore, how to improve the performance and reliability of blind spot monitoring systems while maintaining high bandwidth, low latency, and long-distance transmission, and effectively reduce traffic accidents caused by data loss, data transmission errors, and delays during blind spot transmission, has become a technical problem that needs to be solved. Summary of the Invention

[0003] This invention provides a blind spot monitoring system based on fiber optic transmission to solve the technical problems of data loss, data transmission errors, and untimely transmission during blind spot transmission in the prior art.

[0004] This utility model provides a blind spot monitoring system based on optical fiber transmission, comprising: a data acquisition module, a transmission module, a processing module, and an early warning module. The data acquisition module is used to acquire image data of the blind spot in real time and convert the acquired image data into a first electrical signal. The transmission module is used to convert the first electrical signal into an optical signal, and the optical signal is converted into a second electrical signal after being transmitted through optical fiber. The processing module is used to process the second electrical signal to obtain digital image data of the blind spot and determine the location and information of obstacles based on the digital image data of the blind spot. The early warning module is used to determine the collision risk based on the location and information of obstacles in the blind spot and generate early warning information based on the collision risk.

[0005] Optionally, the acquisition module includes multiple cameras and / or sensors.

[0006] Optionally, the transmission module includes an optical transmitter, an optical fiber, and an optical receiver. The optical transmitter is used to convert a first electrical signal into an optical signal and input it into the optical fiber input end. The optical fiber is used to transmit the optical signal. The optical receiver is used to convert the optical signal at the optical fiber output end into a second electrical signal.

[0007] Optionally, the transmission module includes a first fiber optic transceiver, a second fiber optic transceiver, and an optical fiber, with one end of the optical fiber connected to the transmitting end of the first fiber optic transceiver and the other end of the optical fiber connected to the receiving end of the second fiber optic transceiver.

[0008] Optionally, the fiber optic transceiver includes multiple electrical ports and one optical port. The multiple electrical ports connect to multiple cameras and / or sensors, and the optical port connects to an optical fiber. The fiber optic transceiver includes a 1000BASE-LX SFP transceiver.

[0009] Optionally, the processing module includes an ECU for decoding the second electrical signal to obtain digital image data of the blind spot; and for determining the location and information of obstacles in the blind spot based on the digital image data of the blind spot, including the size, shape and attributes of the obstacles.

[0010] Optionally, the warning module is used to determine the distance between the vehicle and the obstacle based on the location and information of the obstacle in the blind spot; if the distance between the vehicle and the obstacle is less than a first preset distance, the collision risk is high; if the distance between the vehicle and the obstacle is greater than the first preset distance and less than a second preset distance, the collision risk is medium; if the distance between the vehicle and the obstacle is greater than the second preset distance, the collision risk is low.

[0011] Optionally, it also includes a display, an alarm, and a control execution module. The warning module is used to generate warning information based on the collision risk and send the warning information to the display, alarm, and control execution module. The display is used to display the warning information. The alarm is used to issue an alarm. The control execution module is used to generate control commands based on the warning information and control the actuator to perform automatic avoidance.

[0012] Optionally, the optical transmitter includes a light source, a driver, and a modulator. The light source is used to provide an optical signal; the driver is used to provide a stable current or voltage to the light source; and the optical modulator is used to modulate a first electrical signal onto the optical signal, wherein the modulation method includes intensity modulation, phase modulation, or frequency modulation.

[0013] Optionally, the optical receiver includes a photodetector, a preamplifier, and a main amplifier. The optical receiver is connected to the processing module via a serial interface, which may include a UART, SPI, or CAN interface.

[0014] As can be seen from the above technical solution, this utility model provides a blind spot monitoring system based on optical fiber transmission. The blind spot monitoring system includes: a data acquisition module, a transmission module, a processing module, and an early warning module. It acquires blind spot image data in real time, converts the acquired image data into electrical signals, converts the electrical signals into optical signals, transmits the optical signals through optical fiber, and then converts the optical signals back into electrical signals. By using optical fiber to transmit blind spot information, it maintains high bandwidth, low latency, and long-distance information transmission, reduces data loss and transmission errors, improves the stability and reliability of the blind spot monitoring system, reduces the risk of traffic accidents, and improves driving safety. Attached Figure Description

[0015] Figure 1 A schematic diagram of a blind spot monitoring system based on optical fiber transmission provided in an embodiment of this utility model;

[0016] Figure 2 This is a schematic diagram of a blind spot monitoring system based on optical fiber transmission, provided as another embodiment of the present invention. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0018] Figure 1 This diagram illustrates the structure of a blind spot monitoring system based on fiber optic transmission according to an embodiment of the present invention. Figure 1As shown, this embodiment of a fiber optic transmission-based blind spot monitoring system includes: a data acquisition module 11, a transmission module 12, a processing module 13, and an early warning module 14. The data acquisition module 11 acquires vehicle blind spot image data in real time and converts the acquired image data into a first electrical signal through internal circuitry to form digital image data. The image data is input to the transmission module 12 in serial or parallel format. The transmission module 12 includes a light source, a transmission medium, and a detector. The light source is also called a light transmitter, the transmission medium includes an optical fiber, and the detector is also called a light receiver. The light source converts the first electrical signal into an optical signal through optical modulation. The optical signal loaded with the first electrical signal is transmitted from the input end to the output end of the optical fiber. The optical receiver at the output end of the optical fiber converts the optical signal into a second electrical signal through the photoelectric effect. The processing module 13 processes the second electrical signal to obtain digital image data of the blind spot and determines the location and information of obstacles based on the digital image data of the blind spot. The early warning module 14 determines the collision risk based on the location and information of obstacles in the blind spot. The collision risk includes high risk, medium risk, and low risk, and generates early warning information based on the collision risk. Among them, optical fiber transmission is the transmission of data and signals using optical fibers as the medium. The data transmission rate of a single optical fiber can reach several Gbps, and the transmission distance can reach tens of kilometers without the use of repeaters. Therefore, optical fiber can transmit data with high bandwidth, low latency, and long distance, improving the stability and reliability of data transmission.

[0019] The acquisition module 11 includes one or more cameras and one or more sensors. Depending on the specific structure of the truck and the location of blind spots, multiple cameras and / or sensors supporting fiber optic interfaces are installed to cover all blind spots of the truck. For example, cameras with small form-factor pluggable (SFP) interfaces can collect data on the four blind spots of the truck in real time. Cameras with SFP interfaces can be directly connected to optical fibers or connected to optical fibers through optical fiber transceivers. The cameras can be used to collect images of the blind spots, and the sensors can include image sensors to collect images of the blind spots. Distance sensors or speed sensors can be added to the blind spots as needed to collect the distance and speed of obstacles. The internal circuits of the cameras and / or sensors convert the collected image data into corresponding first electrical signals and input the converted electrical signals into the transmission module 12.

[0020] The transmission module 12 includes an optical transmitter, an optical fiber, and an optical receiver. The optical transmitter includes a light source, a driver, and a modulator. The light source provides an optical signal. The driver provides a stable current or voltage to the light source, enabling the light source to emit a stable optical signal. The optical modulator modulates a first electrical signal onto the optical signal. The modulation method includes intensity modulation, phase modulation, or frequency modulation, which loads the first electrical signal by changing the intensity, phase, or frequency of the light wave.

[0021] Optical fibers include single-mode fiber and multimode fiber. Single-mode fiber has a single transmission mode, and the optical signal can maintain a high degree of consistency during transmission, thus ensuring signal quality over long distances. Multimode fiber, with its high bandwidth and low cost, plays an important role in short-distance communication. Based on the requirements of long-distance, high-performance signal transmission for trucks, this embodiment can use single-mode fiber as the transmission medium.

[0022] The optical receiver includes a photodetector, a preamplifier, and a main amplifier. The photodetector converts the received optical signal into a weak electrical signal. The preamplifier performs preliminary amplification and filtering on the weak electrical signal to improve its signal-to-noise ratio and anti-interference capability. The main amplifier further amplifies the electrical signal to a sufficient level for demodulation and recovery by the processing module. The optical receiver connects to the processing module via a serial communication interface, transmitting the converted electrical signal to the processing module based on a universal serial communication protocol. This serial interface can include UART, SPI, or CAN interfaces.

[0023] In a specific embodiment, the transmission module 12 may further include a first fiber optic transceiver, a second fiber optic transceiver, and an optical fiber. One end of the optical fiber is connected to the transmitting end (Transmit, TX) of the first fiber optic transceiver, and the other end is connected to the receiving end (Receive, RX) of the second fiber optic transceiver. The electrical port of the second fiber optic transceiver is connected to the processing module. TX refers to the process of converting an electrical signal into an optical signal. When the first fiber optic transceiver receives an electrical signal transmitted from the camera, the TX module modulates and amplifies the electrical signal, converting it into an optical signal, and then transmits it to the receiving end through the optical fiber. RX refers to the process of converting an optical signal into an electrical signal. When the second fiber optic transceiver receives an optical signal, the RX module first amplifies the optical signal to improve the signal-to-noise ratio, and then converts the amplified optical signal back into an electrical signal for further processing and analysis by the processing module 13.

[0024] A fiber optic transceiver is an Ethernet transmission media conversion unit that converts short-distance electrical signals to long-distance optical signals; it is also known as an optoelectronic converter. A fiber optic transceiver includes multiple electrical ports and one optical port. The transmitting end of the first fiber optic transceiver connects multiple cameras and / or sensors via multiple electrical ports and one optical port to the optical fiber. Typically, it includes four electrical ports, converting digital image data from four cameras into a single optical signal and transmitting it through the optical fiber. The receiving end of the second fiber optic transceiver connects the optical port to the optical fiber output port and the electrical ports to the processing module. Fiber optic transceivers can use 1000BASE-LX SFP transceivers. The 1000BASE-LX standard is based on the IEEE 802.3z protocol and is specifically designed for fiber optic cables. It can use both single-mode and multimode fiber. Using a 1000BASE-LX standard SFP transceiver enables data transmission over distances up to 10 kilometers via single-mode fiber, ensuring high efficiency and stability in data transmission.

[0025] Processing module 13 includes an Electronic Control Unit (ECU). The ECU is an embedded system in the automotive field, responsible for monitoring and controlling subsystems. The core function of the ECU is to run algorithms based on sensor signals and send instructions to actuators. With the development of automotive intelligence, the ECU has gradually evolved into a highly integrated computing platform. The ECU performs data decoding on the second electrical signal, specifically including: signal amplification and filtering: amplification via a preamplifier and removal of noise and unwanted frequency components via a filter. Signal recovery: further processing of the amplified and filtered signal, such as equalization and clock recovery, to ensure signal integrity and accuracy. Data decoding: extracting the digital image data of the blind spot from the modulation format using a decoder to obtain the digital image data of the blind spot. Obstacle features are extracted from the digital image data of the blind spot, and obstacles are identified based on a database to determine the location and information of obstacles in the blind spot. The obstacle location includes its orientation relative to the truck, and the obstacle information includes its size, shape, and attributes. For example, in the digital image feature extraction, it is determined that the obstacle is directly behind the truck, a child, one meter tall, moving.

[0026] The early warning module 14 determines the distance between the vehicle and the obstacle based on the location and information of the obstacle in the blind spot. If the distance is less than a first preset distance, the collision risk is high; if the distance is greater than the first preset distance but less than a second preset distance, the collision risk is medium; if the distance is greater than the second preset distance, the collision risk is low. Specifically, this includes: determining the relative distance between the vehicle and the obstacle based on the location and information of the obstacle in the blind spot. For example, if the first preset distance is 5 meters and the second preset distance is 10 meters, if the distance is less than 5 meters, the collision risk is considered high, and the vehicle can be braked or its steering changed; if the distance is greater than 5 meters but less than 10 meters, the collision risk is considered medium, and the vehicle's power can be limited; if the distance is greater than 10 meters, the collision risk is considered low, and there is no need to control the vehicle's power temporarily.

[0027] In a specific embodiment, the blind spot monitoring system also includes a display, an alarm, and a control execution module. The warning module generates warning information based on collision risk, and can quickly and accurately issue a warning when a person / obstacle is detected in the blind spot while the truck is in motion, reminding the driver to take evasive action. For example, if there is a child 3 meters behind the truck, the warning information is sent to the display, alarm, and control execution module; the display shows the warning information so that the driver can check it at any time; if a high-risk warning is encountered, the alarm sounds to remind the driver to take evasive action; if a high-risk warning is encountered, in order to improve driving safety, the control execution module generates control commands based on the warning information, controlling the truck actuators to perform automatic emergency avoidance or emergency braking.

[0028] Figure 2 This diagram illustrates a structural schematic of a blind spot monitoring system based on fiber optic transmission according to another embodiment of the present invention. Figure 2As shown, the blind spot monitoring system based on fiber optic transmission includes an obstacle 21, a camera 22, a sensor 23, a fiber optic transmission module 24, an ECU 25, a display and warning module 26, and a control execution module 27. Obstacles 21 include people and obstacles in the blind spot; cameras 22 are installed on the truck according to its specific structure and blind spot location to capture images of the blind spot; sensors 23 include image sensors and speed sensors to collect environmental information of the blind spot, and cameras 22 and sensors 23 collect images of the blind spot and convert the image data into electrical signals; the fiber optic transmission module 24 includes a pair of fiber optic transceivers and optical fibers, the fiber optic transceiver at the input end converts the electrical signals transmitted by the camera into optical signals, the optical signals are transmitted through the optical fibers to the fiber optic transceiver at the output end, and the fiber optic transceiver at the output end converts the optical signals into electrical signals; the ECU 25 decodes the converted electrical signals to obtain the image feature information of the blind spot and determines the location and information of obstacles; the display and warning module 26 generates warning information based on the location and information of obstacles and displays it on the truck's display screen; in high-risk or emergency situations, the control execution module 27 controls the truck to perform automatic avoidance or automatic braking to improve driving safety. The transmission of blind spot image information through optical fibers has a fast transmission rate, high accuracy and reliability, thus providing timely blind spot information for safe driving.

[0029] It should be noted that the above embodiments are illustrative of the present invention and not restrictive, and that those skilled in the art can devise alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses should not be construed as limiting the claims. The word "comprising" does not exclude the presence of elements or steps not listed in the claims. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The present invention can be implemented by means of hardware comprising several different elements and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by the same item of hardware. The use of the words first, second, and third, etc., does not indicate any order. These words can be interpreted as names.

[0030] Those skilled in the art will understand that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it; although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope defined by the claims of this utility model.

Claims

1. A blind spot monitoring system based on fiber optic transmission, characterized in that, include: The system consists of a data acquisition module, a transmission module, a processing module, and an early warning module. The acquisition module is used to acquire image data of the blind spot in real time and convert the acquired image data into a first electrical signal; The transmission module is used to convert the first electrical signal into an optical signal, and the optical signal is converted into a second electrical signal after being transmitted through an optical fiber; The processing module is used to process the second electrical signal to acquire digital image data of the blind spot, and to determine the location and information of the obstacle based on the digital image data of the blind spot. The warning module is used to determine the collision risk based on the location and information of obstacles in the blind spot, and to generate warning information based on the collision risk.

2. The blind spot monitoring system according to claim 1, characterized in that, The acquisition module includes multiple cameras and / or sensors.

3. The blind spot monitoring system according to claim 1, characterized in that, The transmission module includes an optical transmitter, an optical fiber, and an optical receiver. The optical transmitter is used to convert the first electrical signal into an optical signal and input it into the optical fiber input end. The optical fiber is used to transmit the optical signal; The optical receiver is used to convert the optical signal at the output end of the optical fiber into the second electrical signal.

4. The blind spot monitoring system according to claim 1, characterized in that, The transmission module includes a first optical fiber transceiver, a second optical fiber transceiver, and an optical fiber. One end of the optical fiber is connected to the transmitting end of the first optical fiber transceiver, and the other end of the optical fiber is connected to the receiving end of the second optical fiber transceiver.

5. The blind spot monitoring system according to claim 4, characterized in that, The fiber optic transceiver includes multiple electrical ports and one optical port. The multiple electrical ports are connected to multiple cameras and / or sensors, and the one optical port is connected to the optical fiber. The fiber optic transceiver includes a 1000BASE-LX SFP transceiver.

6. The blind spot monitoring system according to claim 1, characterized in that, The processing module includes an ECU. The ECU is used to decode the second electrical signal to obtain digital image data of the blind spot. Based on the digital image data of the blind spot, the location and information of obstacles in the blind spot are determined, including the size, shape and attributes of the obstacles.

7. The blind spot monitoring system according to claim 6, characterized in that, Also includes: The warning module is used to determine the distance between the vehicle and the obstacle based on the location and information of the obstacle in the blind spot. If the distance between the vehicle and the obstacle is less than the first preset distance, the risk of collision is high. If the distance between the vehicle and the obstacle is greater than the first preset distance but less than the second preset distance, the collision risk is medium risk. If the distance between the vehicle and the obstacle is greater than the second preset distance, the collision risk is low.

8. The blind spot monitoring system according to claim 7, characterized in that, It also includes a display, an alarm, and a control execution module. The early warning module is used to generate early warning information based on the collision risk, and send the early warning information to the display, the alarm and the control execution module; The display is used to show the warning information; The alarm is used to issue an alarm; The control execution module is used to generate control commands based on the warning information and control the actuator to perform automatic avoidance.

9. The blind spot monitoring system according to claim 3, characterized in that, The optical transmitter includes a light source, a driver, and a modulator. The light source is used to provide light signals; The driver is used to provide a stable current or voltage to the light source; The modulator is used to modulate the first electrical signal onto the optical signal, and the modulation method includes intensity modulation, phase modulation or frequency modulation.

10. The blind spot monitoring system according to claim 3, characterized in that, The optical receiver includes a photodetector, a preamplifier, and a main amplifier. The optical receiver is connected to the processing module via a serial interface, which may include a UART, SPI, or CAN interface.

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