Four-direction real-time driving auxiliary circuit and monitoring system

Abstract

The utility model provides a four-direction real-time driving auxiliary circuit. The four-direction real-time driving auxiliary circuit comprises a picture control chip, a driving state detection chip, a backing-up detection circuit, a left steering detection circuit and a right steering detection circuit. Wherein the reversing detection circuit, the left steering detection circuit and the right steering detection circuit are respectively connected with corresponding detection ends of the driving state detection chip, and are used for receiving signal input of a vehicle driving state. Meanwhile, the output end of the detection circuit is connected with the corresponding amplification display end of the picture control chip, and the video picture in the corresponding direction is automatically amplified according to the running state of the vehicle. Therefore, the monitoring system can automatically adjust the video picture according to the real-time driving state of the vehicle, so that a driver is helped to timely and intuitively observe the surrounding environment in the driving direction, and the accident risk caused by a visual angle blind area is reduced. Therefore, the four-direction real-time driving auxiliary circuit improves the driving safety of the vehicle.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of vehicle monitoring, and particularly relates to a four-orientation real-time driving assistance circuit and a monitoring system. BACKGROUND

[0002] During the driving of a vehicle, the driver needs to monitor the environment around the vehicle in real time to prevent the driver from causing a collision accident by accident. However, the traditional vehicle driving assistance system, such as the ultrasonic ranging reversing system and the reversing image, can only be triggered in the driving scene of reversing or parking, and needs to be manually operated to enlarge the picture of the corresponding orientation, which is not conducive to real-time observation of the environment around the vehicle by the driver during driving.

[0003] For example, the prior art document CN201510274231.6 discloses a vehicle monitoring system and method. The vehicle monitoring system includes first to fourth cameras and an image processor, which are installed on the front, rear, left and right of the vehicle in a left-right symmetrical manner. The image processor includes a first image processing unit and a second image processing unit. The first image processing unit is used to generate a first bird's eye view according to the first to fourth road images captured by the first to fourth cameras, and the first bird's eye view takes the first road image and the fourth road image as the main display. The second image processing unit is used to generate a second bird's eye view according to the first to fourth road images, and the second bird's eye view takes the second road image and the third road image as the main display. The vehicle monitoring system and the vehicle monitoring processing method can effectively reduce the blind area and improve the safety of vehicle driving. However, the bird's eye view generated in this scheme cannot be automatically enlarged during driving, which is not conducive to timely observation of the environment around the vehicle by the driver during driving. UTILITARIAN CONTENT

[0004] The purpose of the present disclosure is to overcome the deficiencies in the prior art and provide a four-orientation real-time driving assistance circuit and a monitoring system which can automatically enlarge the display picture.

[0005] The purpose of the present disclosure is achieved by the following technical solutions:

[0006] A four-orientation real-time driving assistance circuit, characterized in that it comprises a picture control chip, a driving state detection chip, a reversing detection circuit, a left turning detection circuit and a right turning detection circuit,

[0007] The reverse detection circuit is connected with the reverse detection end of the running state detection chip through the reverse signal input end, the left turning detection circuit is connected with the left turning detection end of the running state detection chip through the left turning signal input end, the right turning detection circuit is connected with the right turning detection end of the running state detection chip through the right turning signal input end, the reverse signal output end of the reverse detection circuit is connected with the rear view amplification display end of the picture control chip, the left turning signal output end of the left turning detection circuit is connected with the left view amplification display end of the picture control chip, the right turning signal output end of the right turning detection circuit is connected with the right view amplification display end of the picture control chip, and the forward detection end of the running state detection chip is connected with the front view display end of the picture control chip.

[0008] The reverse detection circuit includes a first electronic switch tube and a first voltage dividing resistor, the reverse signal input end of the reverse detection circuit is connected with the control end of the first electronic switch tube through the first voltage dividing resistor, the first end of the first electronic switch tube is connected with the output end of the reverse detection circuit and the power supply end of an external power supply respectively, and the second end of the first electronic switch tube is grounded.

[0009] The left turning detection circuit includes a second electronic switch tube and a second voltage dividing resistor, the left turning signal input end of the left turning detection circuit is connected with the control end of the second electronic switch tube through the second voltage dividing resistor, the first end of the second electronic switch tube is connected with the output end of the left turning detection circuit and the power supply end of an external power supply respectively, and the second end of the second electronic switch tube is grounded.

[0010] The right turning detection circuit includes a third electronic switch tube and a third voltage dividing resistor, the right turning signal input end of the right turning detection circuit is connected with the control end of the third electronic switch tube through the third voltage dividing resistor, the first end of the third electronic switch tube is connected with the output end of the right turning detection circuit and the power supply end of an external power supply respectively, and the second end of the third electronic switch tube is grounded.

[0011] In one of the embodiments, the reverse detection circuit further includes a first bias resistor, the first end of the first bias resistor is connected with the control end of the first electronic switch tube, and the second end of the first bias resistor is grounded.

[0012] In one of the embodiments, the reverse detection circuit further includes a first filter capacitor and a first current limiting resistor, one end of the first filter capacitor is connected with the control end of the first electronic switch tube, the other end of the first filter capacitor is grounded, the first end of the first current limiting resistor is connected with the power supply end of an external power supply, and the second end of the first current limiting resistor is connected with the first end of the first electronic switch tube.

[0013] In one of the embodiments, the reverse detection circuit further comprises a Zener diode, an anode of the Zener diode is connected with a reverse signal input end of the reverse detection circuit, and a cathode of the Zener diode is connected with a control end of the first electronic switch tube.

[0014] In one of the embodiments, the reverse detection circuit further comprises a freewheeling diode, a positive pole of the freewheeling diode is connected with an input end of the reverse detection circuit, and a negative pole of the freewheeling diode is connected with a control end of the first electronic switch tube.

[0015] In one of the embodiments, the left turn detection circuit further comprises a second biasing resistor, a first end of the second biasing resistor is connected with a control end of the second electronic switch tube, and a second end of the second biasing resistor is grounded.

[0016] In one of the embodiments, the left turn detection circuit further comprises a second filter capacitor and a second current-limiting resistor, one end of the second filter capacitor is connected with a control end of the second electronic switch tube, the other end of the second filter capacitor is grounded, a first end of the second current-limiting resistor is used for being connected with a power supply end of an external power supply, and a second end of the second current-limiting resistor is connected with a first end of the second electronic switch tube.

[0017] In one of the embodiments, the right turn detection circuit further comprises a third biasing resistor, a first end of the third biasing resistor is connected with a control end of the third electronic switch tube, and a second end of the third biasing resistor is grounded.

[0018] In one of the embodiments, the right turn detection circuit further comprises a third filter capacitor and a third current-limiting resistor, one end of the third filter capacitor is connected with a control end of the third electronic switch tube, the other end of the third filter capacitor is grounded, a first end of the third current-limiting resistor is used for being connected with a power supply end of an external power supply, and a second end of the third current-limiting resistor is connected with a first end of the third electronic switch tube.

[0019] A monitoring system comprising the four-orientation real-time driving assistance circuit according to any one of the above.

[0020] Compared with the prior art, the present disclosure has at least the following advantages:

[0021] 1. The four-orientation real-time driving assistance circuit according to the above, a driving state detection chip is used to detect a current driving state of a vehicle, and a level signal is output to a picture control chip, so that the monitoring system can automatically enlarge a video picture of a corresponding orientation according to a real-time driving state of the vehicle, thereby facilitating the driver to observe the surrounding environment of the vehicle in the driving direction in time and intuitively through the monitoring system, and further reducing the probability of an accident caused by the driver's inability to observe the visual angle blind area in time. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of this disclosure, the accompanying drawings used in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of this disclosure and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 A circuit diagram of a four-way real-time driving assistance circuit according to one embodiment;

[0024] Figure 2 for Figure 1 The diagram shown is a partial circuit diagram of the four-way real-time driving assistance circuit. Detailed Implementation

[0025] To facilitate understanding of this disclosure, a more complete description will be given below with reference to the accompanying drawings, which illustrate preferred embodiments of the present disclosure. However, this disclosure can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure.

[0026] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this disclosure. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0028] To better understand the technical solutions and beneficial effects of this disclosure, the following detailed description is provided in conjunction with specific embodiments:

[0029] like Figures 1 to 2 As shown, a four-way real-time driving assistance circuit 10 according to an embodiment of the present disclosure includes a screen control chip U1, a driving status detection chip U2, a reversing detection circuit 100, a left turn detection circuit 200, and a right turn detection circuit 300.

[0030] The reverse signal input end REVERSE_CAM_DET of the reverse detection circuit 100 is connected with the reverse detection end PB11 of the running state detection chip U2, the left turning signal input end LEFT_CAM_DET of the left turning detection circuit 200 is connected with the left turning detection end PB7 of the running state detection chip U2, the right turning signal input end RIGHT_CAM_DET of the right turning detection circuit 300 is connected with the right turning detection end PB6 of the running state detection chip U2, the reverse signal output end VIDEO_REVERSE of the reverse detection circuit 100 is connected with the rear view zoom display end PTZ4 of the picture control chip U1, the left turning signal output end VIDEO_LEFT of the left turning detection circuit 200 is connected with the left view zoom display end PTZ1 of the picture control chip U1, the right turning signal output end VIDEO_RIGHT of the right turning detection circuit 300 is connected with the right view zoom display end PTZ3 of the picture control chip U1, and the forward detection end FRONT_CAM_DET of the running state detection chip U2 is connected with the front view display end VIDEO_FRONT of the picture control chip U1.

[0031] The reverse detection circuit 100 comprises a first electronic switch tube Q1 and a first voltage dividing resistor R1, the reverse signal input end REVERSE_CAM_DET of the reverse detection circuit 100 is connected with the control end of the first electronic switch tube Q1 through the first voltage dividing resistor R1, the first end of the first electronic switch tube Q1 is connected with the output end of the reverse detection circuit 100 and the external power supply end respectively, and the second end of the first electronic switch tube Q1 is grounded.

[0032] The left turning detection circuit 200 comprises a second electronic switch tube Q2 and a second voltage dividing resistor R4, the left turning signal input end LEFT_CAM_DET of the left turning detection circuit 200 is connected with the control end of the second electronic switch tube Q2 through the second voltage dividing resistor R4, the first end of the second electronic switch tube Q2 is connected with the output end of the left turning detection circuit 200 and the external power supply end respectively, and the second end of the second electronic switch tube Q2 is grounded.

[0033] The right turning detection circuit 300 comprises a third electronic switch tube Q3 and a third voltage dividing resistor R7, the right turning signal input end RIGHT_CAM_DET of the right turning detection circuit 300 is connected with the control end of the third electronic switch tube Q3 through the third voltage dividing resistor R7, the first end of the third electronic switch tube Q3 is connected with the output end of the right turning detection circuit 300 and the external power supply end respectively, and the second end of the third electronic switch tube Q3 is grounded.

[0034] In the embodiment, when the driver drives the vehicle to move forward normally, the driving state detection chip U2 detects that the vehicle is not in the reverse and steering state through the sensor, so that the reverse detection end PB11, the left steering detection end PB7 and the right steering detection end PB6 of the driving state detection chip U2 output low level signals to the reverse signal input end REVERSE_CAM_DET of the reverse detection circuit 100, the left steering signal input end LEFT_CAM_DET of the left steering detection circuit 200 and the right steering signal input end RIGHT_CAM_DET of the right steering detection circuit 300 respectively, so that the control end voltage of the first electronic switch tube Q1, the second electronic switch tube Q2 and the third electronic switch tube Q3 is lower than the threshold voltage, so that the three electronic switch tubes are kept in the off state, so that the reverse signal output end VIDEO_REVERSE of the reverse detection circuit 100, the left steering signal output end VIDEO_LEFT of the left steering detection circuit 200 and the right steering signal output end VIDEO_RIGHT of the right steering detection circuit 300 keep outputting high level signals, and the monitoring system can display the video images of the four directions of front view, rear view, left view and right view at the same time, so that the driver can observe and monitor the environment of the four directions at the same time.

[0035] Specifically, when the driver drives the vehicle to steer left, the driving state detection chip U2 detects that the vehicle is steering left through the sensor, so that the left steering detection end PB7 of the driving state detection chip U2 outputs a high level signal to the left steering signal input end LEFT_CAM_DET of the left steering detection circuit 200, so that the control end voltage of the second electronic switch tube is greater than the threshold voltage, so that the second electronic switch tube is in the on state, and the left steering signal output end VIDEO_LEFT of the left steering detection circuit 200 is connected with the ground end through the second electronic switch tube, so that it outputs a low level signal to the left view amplification display end PTZ1 of the picture control chip U1, so that the monitoring system can automatically enlarge the video image of the left view, and at the same time, the video images of the rear view, the right view and the front view are reduced, so that the driver can observe the environment on the left side of the vehicle in time during the steering left driving.

[0036] Further, when the driver drives the vehicle to turn right, the driving state detection chip U2 detects that the vehicle is turning right through the sensor, so that the right turning detection end PB6 of the driving state detection chip U2 outputs a high level signal to the right turning signal input end RIGHT_CAM_DET of the right turning detection circuit 300, so that the voltage of the control end of the third electronic switch tube is greater than its threshold voltage, so that the third electronic switch tube is in the on state, the right turning signal output end VIDEO_RIGHT of the right turning detection circuit 300 is connected with the ground end through the third electronic switch tube, so that it outputs a low level signal to the right view amplification display end PTZ3 of the picture control chip U1, so that the monitoring system can automatically amplify the video picture of the right view, while reducing the video pictures of the rear view, the left view and the front view, so that the driver can observe the environment on the right side of the vehicle in time during the right turning driving.

[0037] Further, when the driver drives the vehicle to turn right, the driving state detection chip U2 detects that the vehicle is turning right through the sensor, so that the right turning detection end PB6 of the driving state detection chip U2 outputs a high level signal to the right turning signal input end RIGHT_CAM_DET of the right turning detection circuit 300, so that the voltage of the control end of the third electronic switch tube is greater than its threshold voltage, so that the third electronic switch tube is in the on state, the right turning signal output end VIDEO_RIGHT of the right turning detection circuit 300 is connected with the ground end through the third electronic switch tube, so that it outputs a low level signal to the right view amplification display end PTZ3 of the picture control chip U1, so that the monitoring system can automatically amplify the video picture of the right view, while reducing the video pictures of the rear view, the left view and the front view, so that the driver can observe the environment on the right side of the vehicle in time during the right turning driving.

[0038] The above-mentioned four-direction real-time driving assistance circuit 10 detects the current driving state of the vehicle through the driving state detection chip U2, and outputs a level signal to the picture control chip U1, so that the monitoring system can automatically amplify the video picture of the corresponding direction view according to the real-time driving state of the vehicle, so as to facilitate the driver to observe the surrounding environment of the vehicle in the driving direction in time through the monitoring system, and further reduce the probability of accidents caused by the driver's inability to observe the view angle blind area in time.

[0039] As Figure 2As shown in one of the embodiments, the reverse detection circuit 100 further comprises a first biasing resistor R3, a first end of the first biasing resistor R3 is connected to the control end of the first electronic switch tube Q1, and a second end of the first biasing resistor R3 is grounded. In this embodiment, since the first biasing resistor R3 is connected to the control end of the first electronic switch tube Q1, the first biasing resistor R3 provides a stable bias voltage for the control end of the first electronic switch tube Q1, thereby reducing the false triggering of the first electronic switch tube Q1 caused by external interference or circuit noise, and further improving the reliability of the reverse detection circuit 100.

[0040] As shown in one of the embodiments, the reverse detection circuit 100 further comprises a first biasing resistor R3, a first end of the first biasing resistor R3 is connected to the control end of the first electronic switch tube Q1, and a second end of the first biasing resistor R3 is grounded. In this embodiment, since the first biasing resistor R3 is connected to the control end of the first electronic switch tube Q1, the first biasing resistor R3 provides a stable bias voltage for the control end of the first electronic switch tube Q1, thereby reducing the false triggering of the first electronic switch tube Q1 caused by external interference or circuit noise, and further improving the reliability of the reverse detection circuit 100. Figure 2 As shown in one of the embodiments, the reverse detection circuit 100 further comprises a first biasing resistor R3, a first end of the first biasing resistor R3 is connected to the control end of the first electronic switch tube Q1, and a second end of the first biasing resistor R3 is grounded. In this embodiment, since the first biasing resistor R3 is connected to the control end of the first electronic switch tube Q1, the first biasing resistor R3 provides a stable bias voltage for the control end of the first electronic switch tube Q1, thereby reducing the false triggering of the first electronic switch tube Q1 caused by external interference or circuit noise, and further improving the reliability of the reverse detection circuit 100.

[0041] As shown in one of the embodiments, the reverse detection circuit 100 further comprises a first biasing resistor R3, a first end of the first biasing resistor R3 is connected to the control end of the first electronic switch tube Q1, and a second end of the first biasing resistor R3 is grounded. In this embodiment, since the first biasing resistor R3 is connected to the control end of the first electronic switch tube Q1, the first biasing resistor R3 provides a stable bias voltage for the control end of the first electronic switch tube Q1, thereby reducing the false triggering of the first electronic switch tube Q1 caused by external interference or circuit noise, and further improving the reliability of the reverse detection circuit 100. Figure 2 As shown in one of the embodiments, the reverse detection circuit 100 further comprises a first biasing resistor R3, a first end of the first biasing resistor R3 is connected to the control end of the first electronic switch tube Q1, and a second end of the first biasing resistor R3 is grounded. In this embodiment, since the first biasing resistor R3 is connected to the control end of the first electronic switch tube Q1, the first biasing resistor R3 provides a stable bias voltage for the control end of the first electronic switch tube Q1, thereby reducing the false triggering of the first electronic switch tube Q1 caused by external interference or circuit noise, and further improving the reliability of the reverse detection circuit 100.

[0042] As shown in one of the embodiments, the reverse detection circuit 100 further comprises a first biasing resistor R3, a first end of the first biasing resistor R3 is connected to the control end of the first electronic switch tube Q1, and a second end of the first biasing resistor R3 is grounded. In this embodiment, since the first biasing resistor R3 is connected to the control end of the first electronic switch tube Q1, the first biasing resistor R3 provides a stable bias voltage for the control end of the first electronic switch tube Q1, thereby reducing the false triggering of the first electronic switch tube Q1 caused by external interference or circuit noise, and further improving the reliability of the reverse detection circuit 100. Figure 2As shown in the figure, in one of the embodiments, the reverse detection circuit 100 further comprises a freewheeling diode D2, the positive electrode of the freewheeling diode D2 is connected with the input end of the reverse detection circuit 100, and the negative electrode of the freewheeling diode D2 is connected with the control end of the first electronic switch tube Q1. In the embodiment, when the voltage of the input end of the reverse detection circuit 100 suddenly decreases or is disconnected, a reverse electromotive force may be generated in the circuit, which is easy to cause a reverse current to flow to the input end of the reverse detection circuit 100 and generate a reverse voltage. At this time, the freewheeling diode D2 plays a role of anti-inrush protection, thereby effectively ensuring that the reverse detection circuit 100 can work normally.

[0043] As shown in the figure, Figure 2 As shown in the figure, in one of the embodiments, the left turn detection circuit 200 further comprises a second biasing resistor R6, the first end of the second biasing resistor R6 is connected with the control end of the second electronic switch tube Q2, and the second end of the second biasing resistor R6 is grounded. In the embodiment, since the second biasing resistor R6 is connected with the control end of the second electronic switch tube Q2, the second biasing resistor R6 provides a stable bias voltage for the control end of the second electronic switch tube Q2, thereby reducing the false triggering of the second electronic switch tube Q2 caused by external interference or circuit noise, and further improving the reliability of the left turn detection circuit 200.

[0044] As shown in the figure, Figure 2 As shown in the figure, in one of the embodiments, the left turn detection circuit 200 further comprises a second filter capacitor C2 and a second current-limiting resistor R5, one end of the second filter capacitor C2 is connected with the control end of the second electronic switch tube Q2, the other end of the second filter capacitor C2 is grounded, the first end of the second current-limiting resistor R5 is used to be connected with the power supply end of the external power supply, and the second end of the second current-limiting resistor R5 is connected with the first end of the second electronic switch tube Q2. In the embodiment, since one end of the second filter capacitor C2 is connected with the control end of the second electronic switch tube Q2, and the other end is connected with the ground, the addition of the second filter capacitor C2 can effectively filter out the high-frequency noise and clutter in the input signal, thereby making the signal input to the control end of the second electronic switch tube Q2 more stable. The second current-limiting resistor R5 is connected in series between the power supply end of the external power supply and the first end of the second electronic switch tube Q2, so as to limit the size of the current flowing into the first end of the second electronic switch tube Q2, thereby preventing the second electronic switch tube Q2 from being damaged due to excessive current, and further improving the stability of the left turn detection circuit 200.

[0045] As shown in the figure, Figure 2As shown in the figure, in one embodiment, the right-turn detection circuit 300 further comprises a third biasing resistor R9, a first end of the third biasing resistor R9 is connected to the control end of the third electronic switch tube Q3, and a second end of the third biasing resistor R9 is grounded. In this embodiment, since the third biasing resistor R9 is connected to the control end of the third electronic switch tube Q3, the third biasing resistor R9 provides a stable bias voltage for the control end of the third electronic switch tube Q3, thereby reducing the false triggering of the third electronic switch tube Q3 caused by external interference or circuit noise, and further improving the reliability of the right-turn detection circuit 300.

[0046] As shown in the figure, Figure 2 As shown in the figure, in one embodiment, the right-turn detection circuit 300 further comprises a third biasing resistor R9, a first end of the third biasing resistor R9 is connected to the control end of the third electronic switch tube Q3, and a second end of the third biasing resistor R9 is grounded. In this embodiment, since the third biasing resistor R9 is connected to the control end of the third electronic switch tube Q3, the third biasing resistor R9 provides a stable bias voltage for the control end of the third electronic switch tube Q3, thereby reducing the false triggering of the third electronic switch tube Q3 caused by external interference or circuit noise, and further improving the reliability of the right-turn detection circuit 300.

[0047] A monitoring system comprising the four-direction real-time driving assistance circuit 10 of any one of the preceding embodiments. In the present embodiment, when the driver drives the vehicle to move forward normally, the driving state detection chip U2 detects that the vehicle is not in the reverse and steering state through the sensor, so that the reverse detection end PB11, the left steering detection end PB7 and the right steering detection end PB6 of the driving state detection chip U2 output low-level signals to the reverse signal input end REVERSE_CAM_DET of the reverse detection circuit 100, the left steering signal input end LEFT_CAM_DET of the left steering detection circuit 200 and the right steering signal input end RIGHT_CAM_DET of the right steering detection circuit 300, respectively, so that the control end voltage of the first electronic switch tube Q1, the second electronic switch tube Q2 and the third electronic switch tube Q3 is lower than the threshold voltage thereof, so that the three electronic switch tubes are kept in the off state, so that the reverse signal output end VIDEO_REVERSE of the reverse detection circuit 100, the left steering signal output end VIDEO_LEFT of the left steering detection circuit 200 and the right steering signal output end VIDEO_RIGHT of the right steering detection circuit 300 keep outputting high-level signals, and thus the monitoring system can display the video images of the front view, the rear view, the left view and the right view at the same time, so that the driver can observe and monitor the environment of the four directions at the same time. Specifically, when the driver drives the vehicle to move leftward, the driving state detection chip U2 detects that the vehicle is moving leftward through the sensor, so that the left steering detection end PB7 of the driving state detection chip U2 outputs a high-level signal to the left steering signal input end LEFT_CAM_DET of the left steering detection circuit 200, so that the control end voltage of the second electronic switch tube is greater than the threshold voltage thereof, so that the second electronic switch tube is in the on state, and the left steering signal output end VIDEO_LEFT of the left steering detection circuit 200 is connected to the ground through the second electronic switch tube, so that it outputs a low-level signal to the left view amplification display end PTZ1 of the picture control chip U1, so that the monitoring system can automatically amplify the video image of the left view, while reducing the video images of the rear view, the right view and the front view, and thus the driver can observe the environment on the left side of the vehicle in time during the leftward driving.Further, when the driver drives the vehicle to turn right, the driving state detection chip U2 detects that the vehicle is turning right through the sensor, so that the right turning detection end PB6 of the driving state detection chip U2 outputs a high level signal to the right turning signal input end RIGHT_CAM_DET of the right turning detection circuit 300, so that the control end voltage of the third electronic switch tube is greater than its threshold voltage, so that the third electronic switch tube is in the on state, and the right turning signal output end VIDEO_RIGHT of the right turning detection circuit 300 is connected with the ground end through the third electronic switch tube, so that it outputs a low level signal to the right view amplification display end PTZ3 of the picture control chip U1, so that the monitoring system can automatically amplify the video picture of the right view, while reducing the video pictures of the rear view, the left view and the front view, so that the driver can observe the environment on the right side of the vehicle in time during the right turning driving. Further, when the driver drives the vehicle to reverse, the driving state detection chip U2 detects that the vehicle is reversing through the sensor, so that the reverse detection end PB11 of the driving state detection chip U2 outputs a high level signal to the reverse signal input end REVERSE_CAM_DET of the reverse detection circuit 100, so that the control end voltage of the first electronic switch tube is greater than its threshold voltage, so that the first electronic switch tube is in the on state, and the reverse signal output end VIDEO_REVERSE of the reverse detection circuit 100 is connected with the ground end through the first electronic switch tube, so that it outputs a low level signal to the rear view amplification display end PTZ4 of the picture control chip U1, so that the monitoring system can automatically amplify the video picture of the rear view, while reducing the video pictures of the left view, the right view and the front view, so that the driver can observe the environment behind the vehicle in time during the reversing driving.

[0048] Compared with the prior art, the present disclosure has at least the following advantages:

[0049] 1. The four-direction real-time driving auxiliary circuit 10 described above detects the current driving state of the vehicle through the driving state detection chip U2, and outputs a level signal to the picture control chip U1, so that the monitoring system can automatically amplify the video picture of the corresponding direction view according to the real-time driving state of the vehicle, thereby facilitating the driver to observe the surrounding environment of the vehicle in the driving direction in time through the monitoring system, and further reducing the probability of accidents caused by the driver's inability to observe the view angle blind area in time.

[0050] The above-described embodiments only express several embodiments of the present disclosure, and the description is relatively specific and detailed, but it cannot be understood as a limitation on the scope of the disclosed patent. It should be noted that for ordinary skilled persons in the art, without departing from the concept of the present disclosure, a number of modifications and improvements can be made, which are within the scope of protection of the present disclosure. Therefore, the protection scope of the present disclosure patent should be subject to the appended claims.

Claims

1. A four-quadrant real-time driving assistance circuit, characterized by comprising: The image control chip, the running state detection chip, the reverse detection circuit, the left turning detection circuit and the right turning detection circuit, The reverse signal input end of the reverse detection circuit is connected with the reverse detection end of the running state detection chip, the left turning signal input end of the left turning detection circuit is connected with the left turning detection end of the running state detection chip, the right turning signal input end of the right turning detection circuit is connected with the right turning detection end of the running state detection chip, the reverse signal output end of the reverse detection circuit is connected with the rear view amplification display end of the image control chip, the left turning signal output end of the left turning detection circuit is connected with the left view amplification display end of the image control chip, the right turning signal output end of the right turning detection circuit is connected with the right view amplification display end of the image control chip, and the forward detection end of the running state detection chip is connected with the front view display end of the image control chip. The reverse detection circuit comprises a first electronic switch tube and a first voltage dividing resistor, the reverse signal input end of the reverse detection circuit is connected with the control end of the first electronic switch tube through the first voltage dividing resistor, the first end of the first electronic switch tube is connected with the output end of the reverse detection circuit and the power supply end of an external power supply respectively, and the second end of the first electronic switch tube is grounded. The left turning detection circuit comprises a second electronic switch tube and a second voltage dividing resistor, the left turning signal input end of the left turning detection circuit is connected with the control end of the second electronic switch tube through the second voltage dividing resistor, the first end of the second electronic switch tube is connected with the output end of the left turning detection circuit and the power supply end of an external power supply respectively, and the second end of the second electronic switch tube is grounded. The right turning detection circuit comprises a third electronic switch tube and a third voltage dividing resistor, the right turning signal input end of the right turning detection circuit is connected with the control end of the third electronic switch tube through the third voltage dividing resistor, the first end of the third electronic switch tube is connected with the output end of the right turning detection circuit and the power supply end of an external power supply respectively, and the second end of the third electronic switch tube is grounded.

2. The four-position real-time driver assist circuit of claim 1, wherein, The reverse detection circuit further comprises a first bias resistor, the first end of the first bias resistor is connected with the control end of the first electronic switch tube, and the second end of the first bias resistor is grounded.

3. The four-position real-time driver assist circuit of claim 2, wherein, The reverse detection circuit further comprises a first filter capacitor and a first current limiting resistor, one end of the first filter capacitor is connected with the control end of the first electronic switch tube, the other end of the first filter capacitor is grounded, the first end of the first current limiting resistor is used for being connected with the power supply end of an external power supply, and the second end of the first current limiting resistor is connected with the first end of the first electronic switch tube.

4. The four-position real-time driver assist circuit of claim 2, wherein, The reverse detection circuit further comprises a stabilizing diode, the anode of the stabilizing diode is connected with the reverse signal input end of the reverse detection circuit, and the cathode of the stabilizing diode is connected with the control end of the first electronic switch tube.

5. The four-position real-time driver assist circuit of claim 2, wherein, The reverse detection circuit further comprises a freewheeling diode, the positive electrode of the freewheeling diode is connected with the input end of the reverse detection circuit, and the negative electrode of the freewheeling diode is connected with the control end of the first electronic switch tube.

6. The four-position real-time driver assist circuit of claim 1, wherein, The left turning detection circuit further comprises a second bias resistor, a first end of the second bias resistor is connected with the control end of the second electronic switch tube, and a second end of the second bias resistor is grounded.

7. The four-position real-time driver assist circuit of claim 6, wherein, The left turning detection circuit further comprises a second filter capacitor and a second current limiting resistor, one end of the second filter capacitor is connected with the control end of the second electronic switch tube, the other end of the second filter capacitor is grounded, a first end of the second current limiting resistor is used for being connected with the power supply end of an external power supply, and a second end of the second current limiting resistor is connected with the first end of the second electronic switch tube.

8. The four-position real-time driver assist circuit of claim 1, wherein, The right turning detection circuit further comprises a third bias resistor, a first end of the third bias resistor is connected with the control end of the third electronic switch tube, and a second end of the third bias resistor is grounded.

9. The four-position real-time driver assist circuit of claim 8, wherein, The right turning detection circuit further comprises a third filter capacitor and a third current limiting resistor, one end of the third filter capacitor is connected with the control end of the third electronic switch tube, the other end of the third filter capacitor is grounded, a first end of the third current limiting resistor is used for being connected with the power supply end of an external power supply, and a second end of the third current limiting resistor is connected with the first end of the third electronic switch tube.

10. A monitoring system, characterized by The four-orientation real-time driving assistance circuit comprises any one of claims 1 to 9.

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