A vehicle-mounted visual ultrasonic sensor system

Abstract

The embodiment of the specification discloses a kind of vehicle-mounted visual ultrasonic sensor systems, including central processing unit, power module, voltage detection reset module, ultrasonic wave transceiver wave module, multiple ultrasonic sensors, CAN communication module, crescent screen signal output module and external crescent screen.Wherein, power module is powered for each component of system, ultrasonic wave transceiver wave module drives sensor and receives echo signal, by central processing unit calculation barrier distance, CAN communication module realizes with the information interaction of vehicle, after the control signal of crescent screen signal output module is converted, it is transmitted to the external crescent screen by vehicle-mounted shield line.The crescent screen integrates microprocessor, alarm module and light module, can with LED matrix color segmentation indication barrier direction and distance, and combined with nixie tube numerical display and bumblebee alarm grading, so as to can provide intuitive visual blind area early warning for driver.

Description

Technical Field

[0001] This application relates to the field of automotive electronics technology, and more particularly to an in-vehicle visual ultrasonic sensor system. Background Technology

[0002] Specialized engineering vehicles (such as excavators, garbage trucks, and water trucks) and minibuses have significant blind spots during reversing and low-speed operations due to their unique body structure and the high or sideways position of the driver's cab. Obstacles such as scattered building materials, small equipment, or construction workers that may be present in these blind spots can easily cause collisions, posing a serious threat to people and property.

[0003] Currently, vehicle blind spot monitoring mainly relies on two technical solutions: traditional ultrasonic radar systems and 360° panoramic imaging systems. Traditional ultrasonic radar systems typically provide simple alerts via dashboard pop-ups, but the warning information is scattered and not intuitive, requiring drivers to frequently look down, resulting in a high cognitive load and significant reaction delays in complex working environments. While 360° panoramic imaging systems offer a panoramic view, the multiple high-definition cameras they rely on are easily obstructed in harsh conditions such as dust and mud, and the image quality deteriorates sharply at night or in rainy or snowy weather. Furthermore, these systems are expensive and complex to maintain, making them difficult to widely adopt in price-sensitive small and medium-sized engineering vehicles. Utility Model Content

[0004] This specification provides an in-vehicle visual ultrasonic sensor system to solve at least one of the technical problems mentioned above.

[0005] To solve the above-mentioned technical problems, the embodiments in this specification are implemented as follows: According to an embodiment of this utility model, a vehicle-mounted visual ultrasonic sensor system is provided, comprising: a central processing unit, a power supply module, a voltage detection and reset module, an ultrasonic transceiver module, multiple ultrasonic sensors, a CAN communication module, a crescent-shaped screen signal output module, and an external crescent-shaped screen; wherein... The input terminal of the power module is connected to the vehicle's ACC power supply, and the output terminal of the power module is connected to the central processing unit, voltage detection and reset module, ultrasonic transceiver module, CAN communication module, crescent screen signal output module and external crescent screen respectively. The power supply terminal of the voltage detection and reset module is connected to the output terminal of the power supply module, and the reset signal output terminal of the voltage detection and reset module is connected to the reset terminal of the central processing unit. The control terminal of the ultrasonic transceiver module is connected to the central processing unit. The signal terminals of the multiple ultrasonic sensors are respectively connected to the signal input terminals of each channel of the ultrasonic transceiver module. The signal input terminal of the CAN communication module is connected to the communication port of the central processing unit, and the signal output terminal of the CAN communication module is connected to the vehicle's CAN bus. The signal input terminal of the crescent screen signal output module is connected to the PWM port of the central processing unit; The external crescent screen is connected to the output terminal of the power module, the output terminal of the crescent screen signal output module and the system ground wire respectively via a vehicle-mounted shielded wire, and the wire harness shielding layer at one end of the vehicle-mounted shielded wire is grounded. The external crescent screen integrates a microprocessor, an alarm module, and a lighting module. The control terminal of the alarm module is connected to the PWM port of the microprocessor, and the control terminal of the lighting module is also connected to the PWM port of the microprocessor.

[0006] In some optional embodiments, the power module consists of a reverse polarity protection component, a surge protection component, a filter component, an energy storage component, and an automotive-grade DC-DC voltage regulator chip connected in sequence.

[0007] In some alternative implementations, the voltage detection and reset module is constructed from a watchdog reset chip.

[0008] In some alternative implementations, the transceiver processing circuit of each channel within the ultrasonic transceiver module is constructed using dual digital NPN transistors.

[0009] In some optional implementations, the crescent screen signal output module consists of an NPN transistor and an RC filter element. The base of the NPN transistor is connected to the PWM port of the central processing unit, the collector of the NPN transistor is connected to the input terminal of the RC filter element, and the output terminal of the RC filter element is connected to the external crescent screen.

[0010] In some optional implementations, the alarm module consists of an NPN transistor and an LC filter element. The base of the NPN transistor in the alarm module is connected to the PWM port of the microprocessor, and the collector of the NPN transistor in the alarm module is connected to the input terminal of the LC filter element.

[0011] In some optional implementations, the CAN communication module consists of an automotive-grade CAN transceiver, an RC filter, and ESD protection devices, and the CAN communication module supports the CAN FD protocol.

[0012] In some alternative implementations, the ultrasonic transceiver module includes a predetermined number of independent sensor signal channels, the predetermined number being determined based on the sensor layout requirements for vehicle blind spot monitoring.

[0013] In some optional implementations, the lighting module of the external crescent screen includes an LED matrix and a digital tube, wherein the LED matrix contains multiple rows and columns of LED beads, and the digital tube is disposed between two adjacent columns of the LED matrix.

[0014] In some alternative implementations, each column of the LED matrix corresponds to an ultrasonic sensor in a different location on the vehicle, and each row of the LED matrix uses a different color to indicate obstacles at different distances.

[0015] The technical solution of this application has several significant technical advantages, as detailed below: 1. The technical solution of this application integrates ultrasonic ranging with visual audible and visual alarms, effectively overcoming the drawbacks of traditional ultrasonic radar systems where warning information is scattered and drivers need to frequently look down to check. This technical solution uses an external crescent-shaped screen to centrally present obstacle distance information through four-segment LED light colors, digital tube numerical displays, and tiered buzzer alarms. This allows drivers to quickly and intuitively obtain complete blind spot environmental information, reducing driver cognitive load and thus improving driving safety and operational convenience.

[0016] 2. The technical solution of this application adopts the design of connecting the external crescent screen with the vehicle-mounted shielded cable and grounding the shielding layer. Combined with the surge protection and filtering components in the power module, a multi-layer electromagnetic protection system is constructed. This enables the vehicle-mounted visual ultrasonic sensor system provided by this application to maintain stable signal transmission and reliable working performance in the complex electromagnetic environment of engineering vehicles and in harsh working conditions such as high dust, rain and fog. It effectively solves the technical problems of traditional 360 panoramic imaging systems being susceptible to interference and having unstable imaging quality.

[0017] 3. In this application's technical solution, the crescent-shaped screen is compact and uses an adhesive installation method, eliminating the need for dedicated installation space like a 360° panoramic screen. It can be directly installed in a position easily observed by the driver. This design improves the system's installation flexibility and adaptability, meeting the installation needs of various types of small and medium-sized engineering vehicles such as minibuses, excavators, and concrete mixer trucks, avoiding the limitation of applicability caused by installation space constraints.

[0018] 4. The crescent-shaped screen signal output module uses simple NPN transistors and RC filters for signal conversion, while the ultrasonic transceiver module uses dual NPN transistors to build the transceiver circuit. This integrated and modular design reduces hardware costs while ensuring performance. Therefore, effective blind spot monitoring can be achieved without expensive high-definition cameras and image processors, solving the technical problem of the high cost hindering the widespread adoption of 360° panoramic systems in small and medium-sized engineering vehicles. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments or prior art of this specification, the drawings used in the description of the embodiments or prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 A schematic diagram of the overall architecture of the vehicle-mounted visual ultrasonic sensor system provided in this application; Figure 2 A schematic diagram of the system architecture of the vehicle-mounted visual ultrasonic sensor system provided for the technical solution of this application and its connection with the vehicle environment; Figure 3 A hardware structure framework diagram of the external crescent screen provided for the technical solution of this application; Figure 4 A schematic diagram of the crescent-shaped screen display interface layout provided for the technical solution of this application. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of one or more embodiments of this specification clearer, the technical solutions of one or more embodiments of this specification will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this specification, and not all of them. Based on the embodiments in this specification, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of one or more embodiments of this specification.

[0022] It should be understood that although the terms first, second, third, etc., may be used in this application to describe various information, this information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another.

[0023] like Figure 1 As shown, Figure 1This application provides a schematic diagram of the overall architecture of the in-vehicle visual ultrasonic sensor system and its connection with the vehicle environment. The system itself mainly consists of an ultrasonic sensor controller, multiple ultrasonic sensors (1-8), and an external crescent-shaped screen. The system connects to the vehicle's CAN bus via its integrated CAN communication module, thereby establishing a bidirectional communication connection with other control units in the vehicle network (such as the Body Control Module, BCM) to obtain the required vehicle status information (such as gear position signals). Simultaneously, the system's power module input is connected to the vehicle's ACC power supply to obtain operating power. The ultrasonic sensor controller, as the system's processing unit, is responsible for receiving vehicle information via the CAN bus, controlling the ultrasonic sensors to perform distance measurement, and sending the processed detection results to the external crescent-shaped screen through its signal output module. The signal terminals of the multiple ultrasonic sensors (e.g., 8) are connected one-to-one with the signal input terminals of each channel of the ultrasonic sensor controller, typically installed in key locations such as the rear bumper of the vehicle, forming a comprehensive monitoring network for blind spots. The external crescent-shaped screen is connected to the ultrasonic sensor controller via an in-vehicle shielded cable and installed in a convenient location for the driver, such as in front of the steering wheel, to provide the final visual and acoustic alarm information.

[0024] This implementation scheme provides an in-vehicle visual ultrasonic sensor system, such as Figure 2 As shown, the system mainly includes a central processing unit, a power supply module, a voltage detection and reset module, an ultrasonic transceiver module, multiple ultrasonic sensors, a CAN communication module, a crescent-shaped screen signal output module, an external crescent screen, a clock module, and a debug interface. The power supply module's input is connected to the vehicle's ACC power supply, providing the operating voltage for the entire system. Its outputs are connected to the central processing unit, voltage detection and reset module, ultrasonic transceiver module, CAN communication module, crescent screen signal output module, and external crescent screen, providing a stable power supply to each module. The power supply terminal of the voltage detection and reset module is connected to the output terminal of the power supply module, and the reset signal output terminal of the voltage detection and reset module is connected to the reset terminal of the central processing unit, realizing the monitoring of system voltage and the reset function in abnormal situations. The control terminal of the ultrasonic transceiver module is connected to the central processing unit, and the signal terminals of multiple ultrasonic sensors are respectively connected to the signal input terminals of each channel of the ultrasonic transceiver module, specifically including 8 ultrasonic sensors (Sensor1-Sensor8), realizing all-round detection of the vehicle's surrounding environment. The signal input terminal of the CAN communication module is connected to the communication port of the central processing unit, and the signal output terminal of the CAN communication module is connected to the vehicle's CAN bus through the CAN_H and CAN_L interfaces, realizing data interaction and information transmission with the vehicle system.

[0025] The signal input terminal of the crescent-shaped screen signal output module is connected to the PWM port of the central processing unit (CPU). This module converts the control signals output by the CPU into a signal format suitable for reception by the external crescent-shaped screen. The external crescent-shaped screen is connected to the output terminals of the power module, the crescent-shaped screen signal output module, and the system ground via a vehicle-mounted shielded cable. One end of the vehicle-mounted shielded cable has its shielding layer grounded to improve the system's electromagnetic interference immunity. The external crescent-shaped screen integrates a microprocessor, an alarm module, and a lighting module. The control terminals of the alarm module and the lighting module are connected to the PWM port of the microprocessor, enabling intuitive distance visualization and audible alarm functions. The clock module is connected to the CPU, providing a stable clock signal to ensure coordinated operation of all system modules. The debug interface is also connected to the CPU for system development, debugging, and fault diagnosis.

[0026] This system uses a central processing unit (CPU) as the control unit to coordinate the operation of various functional modules, enabling the ultrasonic sensor to measure distances and the crescent-shaped screen to display information. When the vehicle starts and preset conditions are met, the system begins operation. The CPU controls the ultrasonic sensor to measure distances according to a specific time sequence, receives and processes the data returned by the sensor, calculates the distance information of obstacles, and then sends control signals to the external crescent-shaped screen via the crescent-shaped screen signal output module. This controls the crescent-shaped screen's lighting module to display the corresponding distance information and, based on the distance, controls the alarm module to emit different audible alerts. This provides the driver with intuitive and accurate obstacle distance information, effectively improving vehicle safety.

[0027] Based on the technical solutions described above, this specification also provides some specific implementation schemes, which are described below.

[0028] In an optional embodiment, the power module consists of a reverse polarity protection component, a surge protection component, a filter component, an energy storage component, and an automotive-grade DC-DC voltage regulator chip connected in sequence.

[0029] In this embodiment, the power module comprises a reverse polarity protection component, a surge protection component, a filter component, an energy storage component, and an automotive-grade DC-DC regulator chip connected in sequence. The reverse polarity protection component uses diodes or dedicated reverse polarity protection chips to prevent damage to the system circuitry due to reversed power polarity. The surge protection component can use TVS diodes or varistors to absorb transient high-voltage pulses in the vehicle power system, protecting subsequent circuits from impact. The filter component includes a π-type filter composed of inductors and capacitors, which effectively filters out high-frequency noise in the power supply, providing a clean power environment for the system. The energy storage component can use a large-capacity capacitor to provide temporary energy replenishment during vehicle power fluctuations, ensuring the continuity of system operation. The automotive-grade DC-DC regulator chip adopts a wide voltage input design, adaptable to a vehicle power supply range of 9-24V.

[0030] In an optional embodiment, the voltage detection and reset module is constructed from a watchdog reset chip.

[0031] In this implementation, the reset signal output terminal of the watchdog reset chip is directly connected to the reset pin of the central processing unit. When the voltage is abnormal, the chip outputs a low-level reset signal to force the central processing unit to reset and restart, ensuring that the system can promptly return to normal operation under unstable or abnormal voltage conditions.

[0032] In an optional embodiment, the transceiver processing circuit of each channel in the ultrasonic transceiver module is constructed using dual digital NPN transistors.

[0033] In this embodiment, the transceiver processing circuit for each channel within the ultrasonic transceiver module is constructed using dual-channel digital NPN transistors. Specifically, each sensor channel is equipped with two digital NPN transistors, responsible for transmitting and receiving ultrasonic signals respectively. One transistor operates in a switching state, driving the ultrasonic sensor to transmit ultrasonic signals of a specific frequency, while the other transistor acts as a signal receiving amplifier, amplifying the weak echo signals received by the sensor so that subsequent signal processing circuits can accurately identify and process them.

[0034] In an optional embodiment, the crescent-shaped screen signal output module consists of an NPN transistor and an RC filter element. The base of the NPN transistor is connected to the PWM port of the central processing unit, the collector of the NPN transistor is connected to the input terminal of the RC filter element, and the output terminal of the RC filter element is connected to the external crescent-shaped screen.

[0035] In this embodiment, specifically, the NPN transistor acts as a voltage-controlled switching element in the circuit. Its base is directly connected to the PWM (Pulse Width Modulation) port of the central processing unit through a suitable current-limiting resistor. This connection method allows the central processing unit to output a PWM square wave digital signal with a specific duty cycle to the port through software programming, thereby accurately controlling the conduction and cutoff states of the NPN transistor.

[0036] The collector of the NPN transistor is connected to the input of an RC filter element, which consists of a resistor and a capacitor and functions to perform digital-to-analog conversion and signal smoothing. When the PWM square wave signal output by the central processing unit drives the NPN transistor to switch at high speed, a square wave signal with varying amplitude but the same waveform is generated at the collector. This signal then enters the RC filter circuit.

[0037] Finally, the smooth DC voltage signal obtained after conversion by the RC filter element is transmitted from its output end to the external crescent screen through the wiring harness. This converted analog voltage signal is used as a control command and is recognized and analyzed by the microprocessor inside the crescent screen, thereby accurately controlling the brightness level and lighting status of the LED lights on the crescent screen or driving the buzzer to produce alarm sounds of different frequencies.

[0038] In an optional embodiment, the alarm module consists of an NPN transistor and an LC filter element. The base of the NPN transistor in the alarm module is connected to the PWM port of the microprocessor, and the collector of the NPN transistor in the alarm module is connected to the input terminal of the LC filter element.

[0039] In this embodiment, the alarm module is mainly used to drive a passive piezoelectric buzzer or speaker to generate an audible alarm signal. An NPN transistor acts as a switching element, controlling the buzzer's on / off state. The LC filter, composed of an inductor and a capacitor, filters out high-frequency components from the PWM signal, enabling the buzzer to emit a stable tone. The inductor is connected in series between the collector of the transistor and the buzzer, and the capacitor is connected in parallel across the buzzer. When the microprocessor's PWM port outputs signals of different frequencies, the buzzer will emit different tones after LC filtering. By changing the frequency and duty cycle of the PWM signal, alarm sounds of different frequencies and volumes can be achieved to meet alarm requirements at different distances.

[0040] In an optional embodiment, the CAN communication module consists of an automotive-grade CAN transceiver, an RC filter, and ESD protection devices, and the CAN communication module supports the CAN FD protocol.

[0041] In this embodiment, the CAN communication module consists of an automotive-grade CAN transceiver, an RC filter, and ESD protection devices. The automotive-grade CAN transceiver is responsible for bidirectional conversion between the system's internal logic levels and the differential signals of the CAN bus. To further improve communication quality, an RC filter composed of resistors and capacitors is installed between the CAN transceiver and the vehicle's CAN bus interface. This RC filter effectively filters out high-frequency common-mode noise and spike interference on the bus, thus purifying the communication signal.

[0042] Meanwhile, to protect precision integrated circuits from potential damage caused by electrostatic discharge (ESD) pulses commonly found in vehicle circuits, this module also integrates an ESD protection device. This device can be a transient voltage suppressor diode (TVS diode), connected in parallel between the high and low voltage signal lines of the CAN bus and grounded nearby. When a momentary high-voltage electrostatic pulse occurs on the bus harness, the ESD protection device can quickly respond and conduct, dissipating the dangerous energy to ground, thereby providing an effective protection barrier for the downstream CAN transceiver.

[0043] In addition, the CAN communication module supports the CAN FD (Controller Area Network Flexible Data-Rate) protocol, which is an enhancement of the traditional CAN protocol. It can switch to a higher communication rate in the data transmission phase after the arbitration phase, improving data transmission efficiency and expanding the length of a single frame data field. This allows the system to interact with other vehicle control units (such as vehicle controllers, gateways, etc.) with richer status information and sensor data.

[0044] In an optional embodiment, the ultrasonic transceiver module includes a predetermined number of independent sensor signal channels, the predetermined number being determined based on the sensor layout requirements for vehicle blind spot monitoring.

[0045] In this embodiment, the number of independent sensor signal channels can be pre-set based on the actual vehicle blind spot monitoring requirements. This number can be configured according to the target vehicle's model, size, and the blind spot range it needs to cover. Specifically, the predetermined number can be determined by the sensor layout requirements for vehicle blind spot monitoring. For vehicles with long bodies and complex blind spots, such as medium-sized buses or special engineering vehicles, sensors are usually required to be arranged at multiple key locations on the front, rear, left, and right sides of the vehicle to form an all-round monitoring network. For example, in a typical implementation, to meet the all-round blind spot monitoring of a small bus, the predetermined number is set to 8. These 8 independent sensor signal channels enable the system to simultaneously drive and receive signals from 8 ultrasonic sensors, thereby supporting a complete sensor layout. This layout may include: 2 sensors arranged on the front bumper to detect obstacles at close range ahead; 4 sensors arranged on the rear bumper to achieve key coverage of the blind spots directly behind and at the rear corners; and 1 sensor arranged below each of the side rearview mirrors to monitor obstacles on the sides of the vehicle.

[0046] In an optional embodiment, the lighting module of the external crescent screen includes an LED matrix and a digital tube. The LED matrix contains multiple rows and columns of LED beads, and the digital tube is disposed between two adjacent columns of the LED matrix.

[0047] In this embodiment, the external crescent-shaped screen's lighting module includes an LED matrix and digital tubes. The LED matrix contains multiple rows and columns of LED beads, and the digital tubes are positioned between adjacent columns of the LED matrix. Figure 4 As shown, Figure 4 This is a schematic diagram of the crescent-shaped screen display interface layout provided by the technical solution of this application in a possible practical scenario, as shown below. Figure 4 As shown, the LED matrix uses a 4×4 arrangement, containing 16 LEDs arranged in 4 rows and 4 columns. Each row of LEDs uses a different color, from top to bottom: red, orange, yellow, and green, corresponding to different distance ranges. The digital display uses a 2-digit 7-segment display, positioned between the 2nd and 3rd columns of the LED matrix, to display the actual distance to obstacles in meters. The digital display can use red LEDs for clear visibility even in low-light conditions. In this scheme, both the LED matrix and the digital display are controlled by a microprocessor inside the crescent-shaped screen. The microprocessor controls the corresponding LEDs to light up or turn off based on received signals, displaying the distance value on the digital display. This combined display method provides both intuitive distance level indication and precise distance values, allowing the driver to quickly determine the position and distance of obstacles.

[0048] Based on the above embodiments, in optional embodiments, each column of the LED matrix can correspond to ultrasonic sensors in different directions of the vehicle, and each row of the LED matrix uses different colors to indicate obstacles at different distances.

[0049] In this embodiment, the LED matrix establishes an intuitive spatial and visual mapping relationship with the vehicle's environmental information through its row and column layout. Each column of the matrix is ​​configured with ultrasonic sensors corresponding to different locations on the vehicle (such as the rear left, rear left center, rear right center, and rear right), thereby achieving accurate positioning of obstacles. Each row of the matrix can use different colors such as red, orange, yellow, and green as visual codes to indicate obstacles at different distances, from very close to far away. This constitutes a visual warning system with position as the horizontal axis and distance as the vertical axis, allowing the driver to obtain the specific location of the obstacle and its approximate degree of danger at a glance, thereby improving information recognition efficiency and operational safety.

[0050] In practice, the screen layout of a crescent-shaped screen can be as follows: Figure 4 As shown in the diagram, the crescent-shaped screen displays a 4x4 light matrix. From left to right, the four columns of lights correspond to sensors in the four directions: rear left, rear left-center, rear right-center, and rear right. A two-digit LED display is located between the second and third columns, outputting the actual distance measurement value. The four rows of lights from top to bottom are red, orange, yellow, and green, corresponding to the distance measured. When the vehicle is not in reverse (R), the crescent-shaped screen light matrix shows no activity, and the two-digit LED display shows "—.—". When the vehicle is in reverse (R) and there are no obstacles within the distance measurement range, the behavior is the same as when not in reverse (R). When the vehicle is in reverse (R) and there is an obstacle 2.5m from the rear left, the first row of lights in the first column illuminates green, the two-digit LED display shows "2.5", and the buzzer does not sound. When the vehicle is in reverse (R) and there is an obstacle 0.5m from the rear left-center, the second row of lights illuminates up to the first row of green. When the vehicle is in reverse gear and there is an obstacle 1m behind the right center, the third row of lights illuminates to the second row of yellow, the two-digit display shows a distance of "1.0", and the buzzer sounds an alarm at a relatively rapid interval. When the vehicle is in reverse gear and there is an obstacle within 0.3m behind the right center, the fourth row of lights illuminates to the fourth row of red, the two-digit display shows a distance of "0.3", and the buzzer sounds a continuous alarm.

[0051] The technical solution of this application has several significant technical advantages, as detailed below: 1. The technical solution of this application integrates ultrasonic ranging with visual audible and visual alarms, effectively overcoming the drawbacks of traditional ultrasonic radar systems where warning information is scattered and drivers need to frequently look down to check. This technical solution uses an external crescent-shaped screen to centrally present obstacle distance information through four-segment LED light colors, digital tube numerical displays, and tiered buzzer alarms. This allows drivers to quickly and intuitively obtain complete blind spot environmental information, reducing driver cognitive load and thus improving driving safety and operational convenience.

[0052] 2. The technical solution of this application adopts the design of connecting the external crescent screen with the vehicle-mounted shielded cable and grounding the shielding layer. Combined with the surge protection and filtering components in the power module, a multi-layer electromagnetic protection system is constructed. This enables the vehicle-mounted visual ultrasonic sensor system provided by this application to maintain stable signal transmission and reliable working performance in the complex electromagnetic environment of engineering vehicles and in harsh working conditions such as high dust, rain and fog. It effectively solves the technical problems of traditional 360 panoramic imaging systems being susceptible to interference and having unstable imaging quality.

[0053] 3. In this application's technical solution, the crescent-shaped screen is compact and uses an adhesive installation method, eliminating the need for dedicated installation space like a 360° panoramic screen. It can be directly installed in a position easily observed by the driver. This design improves the system's installation flexibility and adaptability, meeting the installation needs of various types of small and medium-sized engineering vehicles such as minibuses, excavators, and concrete mixer trucks, avoiding the limitation of applicability caused by installation space constraints.

[0054] 4. The crescent-shaped screen signal output module uses simple NPN transistors and RC filters for signal conversion, while the ultrasonic transceiver module uses dual NPN transistors to build the transceiver circuit. This integrated and modular design reduces hardware costs while ensuring performance. Therefore, effective blind spot monitoring can be achieved without expensive high-definition cameras and image processors, solving the technical problem of the high cost hindering the widespread adoption of 360° panoramic systems in small and medium-sized engineering vehicles.

[0055] It should be noted that the above-mentioned technical effects do not need to be achieved in every embodiment.

[0056] Those skilled in the art will understand that the modules in the apparatus of the embodiments can be distributed in the apparatus of the embodiments as described in the embodiments, or they can be located in one or more devices different from this embodiment with corresponding changes. The modules of the above embodiments can be combined into one module, or they can be further divided into multiple sub-modules.

[0057] Finally, it should be noted 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 of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A vehicle-mounted visual ultrasonic sensor system, characterized in that, include: Central processing unit, power module, voltage detection and reset module, ultrasonic transceiver module, multiple ultrasonic sensors, CAN communication module, crescent screen signal output module and external crescent screen; in The input terminal of the power module is connected to the vehicle's ACC power supply, and the output terminal of the power module is connected to the central processing unit, voltage detection and reset module, ultrasonic transceiver module, CAN communication module, crescent screen signal output module and external crescent screen respectively. The power supply terminal of the voltage detection and reset module is connected to the output terminal of the power supply module, and the reset signal output terminal of the voltage detection and reset module is connected to the reset terminal of the central processing unit. The control terminal of the ultrasonic transceiver module is connected to the central processing unit. The signal terminals of the multiple ultrasonic sensors are respectively connected to the signal input terminals of each channel of the ultrasonic transceiver module. The signal input terminal of the CAN communication module is connected to the communication port of the central processing unit, and the signal output terminal of the CAN communication module is connected to the vehicle's CAN bus. The signal input terminal of the crescent screen signal output module is connected to the PWM port of the central processing unit; The external crescent screen is connected to the output terminal of the power module, the output terminal of the crescent screen signal output module and the system ground wire respectively via a vehicle-mounted shielded wire, and the wire harness shielding layer at one end of the vehicle-mounted shielded wire is grounded. The external crescent screen integrates a microprocessor, an alarm module, and a lighting module. The control terminal of the alarm module is connected to the PWM port of the microprocessor, and the control terminal of the lighting module is also connected to the PWM port of the microprocessor.

2. The vehicle-mounted visual ultrasonic sensor system according to claim 1, characterized in that, The power module consists of a reverse polarity protection component, a surge protection component, a filter component, an energy storage component, and an automotive-grade DC-DC voltage regulator chip connected in sequence.

3. The vehicle-mounted visual ultrasonic sensor system according to claim 1, characterized in that, The voltage detection and reset module is constructed from a watchdog reset chip.

4. The vehicle-mounted visual ultrasonic sensor system according to claim 1, characterized in that, The transceiver processing circuit of each channel in the ultrasonic transceiver module is constructed from dual digital NPN transistors.

5. The vehicle-mounted visual ultrasonic sensor system according to claim 1, characterized in that, The crescent-shaped screen signal output module consists of an NPN transistor and an RC filter element. The base of the NPN transistor is connected to the PWM port of the central processing unit, the collector of the NPN transistor is connected to the input terminal of the RC filter element, and the output terminal of the RC filter element is connected to the external crescent screen.

6. The vehicle-mounted visual ultrasonic sensor system according to claim 1, characterized in that, The alarm module consists of an NPN transistor and an LC filter element. The base of the NPN transistor in the alarm module is connected to the PWM port of the microprocessor, and the collector of the NPN transistor in the alarm module is connected to the input terminal of the LC filter element.

7. The vehicle-mounted visual ultrasonic sensor system according to claim 1, characterized in that, The CAN communication module consists of an automotive-grade CAN transceiver, an RC filter, and ESD protection devices. The CAN communication module supports the CAN FD protocol.

8. The vehicle-mounted visual ultrasonic sensor system according to claim 1, characterized in that, The ultrasonic transceiver module includes a predetermined number of independent sensor signal channels, the predetermined number being determined based on the sensor layout requirements for vehicle blind spot monitoring.

9. The vehicle-mounted visual ultrasonic sensor system according to claim 1, characterized in that, The external crescent screen's lighting module includes an LED matrix and a digital tube. The LED matrix contains multiple rows and columns of LED beads, and the digital tube is positioned between adjacent columns of the LED matrix.

10. The vehicle-mounted visual ultrasonic sensor system according to claim 9, characterized in that, Each column of the LED matrix corresponds to an ultrasonic sensor in a different location on the vehicle, and each row of the LED matrix uses a different color to indicate obstacles at different distances.

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