CN110780288A - Road danger prompting method and device, vehicle-mounted equipment and storage medium - Google Patents
Road danger prompting method and device, vehicle-mounted equipment and storage medium Download PDFInfo
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- CN110780288A CN110780288A CN201910937272.7A CN201910937272A CN110780288A CN 110780288 A CN110780288 A CN 110780288A CN 201910937272 A CN201910937272 A CN 201910937272A CN 110780288 A CN110780288 A CN 110780288A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
- G01S13/06—Systems determining position data of a target
- G01S13/08—Systems for measuring distance only
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
- B60Q9/00—Arrangement or adaptation of signal devices not provided for in one of main groups B60Q1/00 - B60Q7/00, e.g. haptic signalling
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
- G01S13/50—Systems of measurement based on relative movement of target
- G01S13/58—Velocity or trajectory determination systems; Sense-of-movement determination systems
- G01S13/62—Sense-of-movement determination
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/88—Radar or analogous systems specially adapted for specific applications
- G01S13/93—Radar or analogous systems specially adapted for specific applications for anti-collision purposes
- G01S13/931—Radar or analogous systems specially adapted for specific applications for anti-collision purposes of land vehicles
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Abstract
The application relates to the technical field of automobile safety, in particular to a road danger prompting method and device, vehicle-mounted equipment and a storage medium. The road danger prompting method is applied to vehicle-mounted equipment, the vehicle-mounted equipment comprises a radar, and the road danger prompting method comprises the following steps: acquiring a detection signal returned by a radar when a signal transmitted by a radar touches an obstacle; calculating the distance and the direction of the obstacle according to the detection signal; and sending out a prompt signal to prompt a driver to pay attention to safety when the distance and the direction of the obstacle reach preset safety thresholds. The technical scheme of this application, the state of road barrier can intelligent judgement, sends the suggestion when the road is dangerous, reports to the police to the driver, has improved the safe driving that the driver drove.
Description
Technical Field
The application relates to the technical field of automobile safety, in particular to a road danger prompting method and device, vehicle-mounted equipment and a storage medium.
Background
At present, the automobile ownership quantity in China is the first in the world, and under the condition of large automobile ownership quantity, the automobile accidents are serious. When a driver drives a vehicle, traffic accidents easily occur in conditions such as curves. In the prior art, the scheme can intelligently prompt a driver of danger in the driving process of the vehicle.
Therefore, how to provide a scheme capable of reminding a driver on a dangerous road of a vehicle is a technical problem to be solved urgently by technical personnel in the field.
Disclosure of Invention
The application provides a road danger prompting method, a road danger prompting device, vehicle-mounted equipment and a storage medium, and aims to solve the technical problem that an existing scheme cannot prompt a driver on a dangerous road.
In a first aspect, the present application provides a road danger prompting method applied to a vehicle-mounted device, the road danger prompting method including:
acquiring a detection signal returned by a radar when a signal transmitted by a radar touches an obstacle;
calculating the distance and the direction of the obstacle according to the detection signal;
and sending out a prompt signal to prompt a driver to pay attention to safety when the distance and the direction of the obstacle reach preset safety thresholds.
Preferably, the obstacle is an isolation strip, and before the distance and the direction of the obstacle reach preset safety thresholds and a prompt signal is sent, the road danger prompting method further includes:
generating an isolation zone extension curve according to the distance and the direction of the isolation zone, wherein the isolation zone extension curve is a position and a change curve of the isolation zone on a preset map;
and displaying the extension curve of the isolation belt.
Preferably, the sending out a prompt signal when the distance and the direction of the obstacle reach a preset safety threshold includes:
when the distance of the isolation belt at a preset angle in front of the vehicle is smaller than a preset distance threshold value, sending a prompt signal; or
And sending out a prompt signal when the bending program of the extension curve of the isolation belt is greater than a preset bending threshold value.
Preferably, the radar includes a transmitting antenna, a first receiving antenna and a receiving antenna, a receiving antenna distance between the first receiving antenna and the second receiving antenna is d, and the calculating the distance and the direction of the obstacle according to the detection signal includes:
identifying the phase difference of the signals received by the first receiving antenna and the second receiving antenna as b and the time difference t between the time of the signal transmitted by the transmitting antenna and the time of the signal received by the first receiving antenna according to the detection signal;
and calculating the azimuth angle of the direction of the obstacle according to the receiving antenna distance d and the phase difference b, and calculating the distance of the obstacle according to the time difference t and the speed of light.
Preferably, the vehicle-mounted device includes a navigation module, and before the signal transmitted by the radar hits the detection signal returned by the obstacle, the road hazard prompting method further includes:
controlling the navigation module to acquire a navigation signal;
and displaying the current road track according to the navigation signal and a preset navigation map.
Preferably, the road hazard prompting method further includes:
judging whether the navigation signal is positioned on an expressway or not according to the navigation signal;
when the radar is located on the highway, a detection signal returned by the fact that a signal transmitted by the radar meets an obstacle is obtained.
Preferably, the vehicle-mounted device includes a photosensitive sensor, and before the signal transmitted by the radar hits the detection signal returned by the obstacle, the road danger prompting method further includes:
controlling the photosensitive sensor to acquire an optical signal;
identifying whether the day or the night is according to the optical signal;
acquiring the speed of a vehicle;
the speed of a motor vehicle is greater than a preset speed threshold value, and a detection signal returned when a signal transmitted by a radar touches an obstacle is acquired at night.
In a second aspect, the present application further provides a road danger prompting device applied to a vehicle-mounted device, the road danger prompting device includes:
the detection signal acquisition module is used for acquiring a detection signal returned by a radar when the signal is collided with an obstacle;
the calculation module is used for calculating the distance and the direction of the obstacle according to the detection signal;
and the prompting module is used for sending out a prompting signal when the distance and the direction of the barrier reach preset safety threshold values so as to prompt a driver to pay attention to safety.
Preferably, the road danger prompting device further includes:
the generating module is used for generating an isolation belt extension curve according to the distance and the direction of the isolation belt, wherein the isolation belt extension curve is a position and a change curve of the isolation belt on a preset map;
and the first display module is used for displaying the extension curve of the isolation belt.
Preferably, the first display module is further configured to control the display device to display the extension curve of the isolation strip.
Preferably, the prompting module is specifically configured to send a prompting signal when the distance of the isolation zone at a preset angle in front of the vehicle is smaller than a preset distance threshold; or when the bending program of the extension curve of the isolation belt is larger than a preset bending threshold value, sending a prompt signal.
Preferably, the calculation module comprises:
the identification unit is used for identifying that the phase difference of the signals received by the first receiving antenna and the second receiving antenna is b and the time difference t between the time of the signal transmitted by the transmitting antenna and the time of the signal received by the first receiving antenna is t according to the detection signal;
and the calculation unit is used for calculating the azimuth angle of the direction of the obstacle according to the receiving antenna distance d and the phase difference b, and calculating the distance of the obstacle according to the time difference t and the speed of light.
Preferably, the road danger prompting device further includes:
the navigation signal acquisition module is used for controlling the navigation module to acquire a navigation signal;
and the second display module is used for displaying the current road track according to the navigation signal and a preset navigation map.
Preferably, the road danger prompting device further includes:
and the judging module is used for judging whether the navigation signal is positioned on an expressway or not according to the navigation signal.
And the detection signal acquisition module is also used for acquiring a detection signal returned by the radar when the signal is in the expressway and meets an obstacle.
Preferably, the road danger prompting device further includes:
the optical signal acquisition module controls the photosensitive sensor to acquire an optical signal;
the identification module is used for identifying day or night according to the optical signal;
the vehicle speed acquisition module is used for acquiring the vehicle speed of the vehicle;
the detection signal acquisition module is further used for acquiring a detection signal returned by a radar-transmitted signal when the vehicle speed is greater than a preset speed threshold value and the signal meets an obstacle at night.
In a third aspect, the present application further provides an onboard apparatus, including:
the memory is used for storing a road danger prompting program;
and a processor, configured to implement the road danger prompting method according to the embodiment of the first aspect of the present application when executing the road danger prompting program.
In a fourth aspect, the present application further provides a storage medium, where the storage medium is a computer-readable storage medium, and a road danger prompting program is stored in the storage medium, where the road danger prompting program, when executed by a processor, implements the road danger prompting method according to the embodiment of the first aspect of the present application.
Compared with the prior art, the technical scheme provided by the application obtains the detection signal returned by the radar when the signal transmitted by the radar touches the obstacle; calculating the distance and the direction of the obstacle according to the detection signal; when the distance and the direction of the obstacle reach preset safety threshold values, a prompt signal is sent out to prompt a driver to pay attention to safety, the state of the road obstacle can be intelligently judged, a prompt is sent out when the road is dangerous, the driver is warned, and safe driving of the driver is improved.
Drawings
Fig. 1 is a flowchart of a road hazard prompting method according to a first embodiment of the present application.
Fig. 2 is a schematic diagram of a relationship between a radar and an obstacle in the present application.
Fig. 3 is a flowchart of a road hazard prompting method according to a second embodiment of the present application.
Fig. 4 is a schematic block diagram of a road hazard indicating device according to a third embodiment of the present application.
Fig. 5 is a schematic structural diagram of an in-vehicle device according to a fourth embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
The terms "first," "second," "third," "fourth," and the like in the description and in the claims of the present application and in the drawings described above, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It will be appreciated that the data so used may be interchanged under appropriate circumstances such that the embodiments described herein may be practiced otherwise than as specifically illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
It should be noted that the descriptions in this application referring to "first", "second", etc. are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present application.
Referring to fig. 1, fig. 1 is a diagram of a road danger prompting method according to a first embodiment of the present application, where the road danger prompting method may be implemented by a road danger prompting device, the road danger prompting device may be implemented in a hardware and/or software manner, and is used to prompt a user when a road condition is dangerous, and the road danger prompting method is applied to a vehicle-mounted device, where the vehicle-mounted device includes a radar and is installed on a vehicle. The road danger prompting method comprises the following steps:
s11: and acquiring a detection signal returned by the radar when the signal is collided with the obstacle.
The radar may be a millimeter wave radar. The signals transmitted by the millimeter wave radar, namely the transmitted millimeter waves have strong capability of penetrating fog, smoke and dust, have the characteristics of all weather and all day long, and are not influenced by the environment such as night and the like. The method has strong adaptability. When the millimeter wave radar works, signals (millimeter waves) can be transmitted, the signals can return when meeting obstacles, and the signals are acquired by the radar to return detection signals. For example, on a highway, signals transmitted by the radar meet isolation zones on roadsides or return, and the radar can acquire returned detection signals.
S12: and calculating the distance and the direction of the obstacle according to the detection signal.
Referring to fig. 2, the radar includes a transmitting antenna 51, a first receiving antenna 52 and a second receiving antenna 53. The transmitting antenna 51 is used for transmitting signals, and the first receiving antenna 52 and the second receiving antenna 53 are used for receiving signals, respectively. The signal from the transmitting antenna 51 passes out of the surface 54 of the radar and encounters an obstacle 60 and returns to form a probe signal, which is received by the first receiving antenna 52 and the second receiving antenna 53, respectively.
Wherein the receiving antenna distance between the first receiving antenna 52 and the second receiving antenna 53 is d.
The calculating the distance and the direction of the obstacle according to the detection signal comprises:
identifying the phase difference of the signals received by the first receiving antenna and the second receiving antenna as b and the time difference t between the time of the signal transmitted by the transmitting antenna and the time of the signal received by the first receiving antenna according to the detection signal;
and calculating the azimuth angle of the direction of the obstacle according to the receiving antenna distance d and the phase difference b, and calculating the distance of the obstacle according to the time difference t and the speed of light.
Specifically, the azimuth angle a of the direction of the obstacle is
If the speed of light is c, the distance of the obstacle is
The azimuth angle a in the direction in the present application is an included angle between a straight line L in the extending direction of the vehicle body and a straight line on which the detection signal reflected by the first receiving antenna 52 is irradiated. It is understood that the signal emitted by the radar is refracted after exiting the radar and after entering the radar. The azimuth angle a is the angle between the reflected signal inside the radar and the line L.
Preferably, the obstacle is an isolation strip on the highway, and before performing step S13, the road hazard prompting method further includes:
generating an isolation zone extension curve according to the distance and the direction of the isolation zone, wherein the isolation zone extension curve is a position and a change curve of the isolation zone on a preset map; and displaying the extension curve of the isolation belt.
The method can calculate the distance and the direction of one point of the isolation strip, and can calculate the distance and the direction of all the isolation strips which can be detected by a radar, namely, the specific position and the change curve of the isolation strip can be displayed on a map. When the extension curve of the isolation strip is displayed, the extension curve can be displayed by a display device. If the vehicle-mounted equipment comprises a display device for displaying the extension curve of the isolation belt, the vehicle-mounted equipment comprises:
and controlling the display device to display the extension curve of the isolation belt.
The type of the display device is not limited, and the display device may be a display meter or a Head Up Display (HUD), for example. With the change of time, the vehicle advances, and the extension curve of the isolation belt also changes.
S13: and sending out a prompt signal to prompt a driver to pay attention to safety when the distance and the direction of the obstacle reach preset safety thresholds.
The safety threshold may be set as required, for example, the safety threshold is 3m in the direction of the azimuth angle a of 45 ° of the obstacle. The barrier may be a median. Specifically, when the distance and the direction of the obstacle reach a preset safety threshold, a prompt signal is sent, including:
when the distance of the isolation belt at a preset angle in front of the vehicle is smaller than a preset distance threshold value, sending a prompt signal; or when the bending program of the extension curve of the isolation belt is larger than a preset bending threshold value, sending a prompt signal.
The preset angle and the preset distance can be set according to needs, for example, a prompt signal is sent when the distance between the isolation belt and the vehicle is less than 3m based on the direction of 45 degrees in the left front or 45 degrees in the right front of the vehicle. The curve threshold is not limited, and the larger the curve threshold is, namely the larger the degree of road turning is, the prompting signal is sent out. When the prompting signal is sent out, the prompting can be carried out in a voice mode or a light mode. If the vehicle is in danger in a curve, the voice is given out, namely 'the road ahead is sharply turned and the driver is aware of safety'.
According to the road danger prompting method provided by the embodiment, a detection signal returned by a radar when a signal transmitted by a radar touches an obstacle is obtained; calculating the distance and the direction of the obstacle according to the detection signal; when the distance and the direction of the obstacle reach preset safety threshold values, a prompt signal is sent out to prompt a driver to pay attention to safety, the state of the road obstacle can be intelligently judged, a prompt is sent out when the road is dangerous, the driver is warned, and safe driving of the driver is improved.
Referring to fig. 3, a second embodiment of the present application also provides a road danger prompting method, and based on the foregoing embodiments, the present embodiment provides a solution for prompting a danger, where the road danger prompting method is applied to a vehicle-mounted device, the vehicle-mounted device includes a navigation module and a photosensitive sensor, and the vehicle-mounted device is mounted on a vehicle, and the road danger prompting method includes:
s21: and controlling the navigation module to acquire a navigation signal.
The navigation module can communicate with a satellite navigation system to obtain navigation signals such as the position of the vehicle and the speed of the vehicle. The Satellite Navigation System may be a Global Positioning System (GPS), a BeiDou Navigation Satellite System (BDS), and the like, and the Navigation module may be a GPS module, a BDS module, and the like. The control navigation module may acquire the navigation signal.
S22: and displaying the current road track according to the navigation signal and a preset navigation map.
The preset navigation map can be a high map, a Baidu map and the like. The current road track is track information of nearby roads displayed on the navigation map. The current road track enables a driver to see the overall condition of the road, and the driving of the driver is facilitated.
S23: and controlling the photosensitive sensor to acquire an optical signal.
The photosensor generates a light signal by sensing light.
S24: and identifying whether the day or the night is according to the optical signal.
The light-sensitive sensor has different signals when the light intensity is greatly different, and based on the signals, whether the weather is daytime or nighttime can be identified.
S25: the speed of the vehicle is obtained.
The vehicle-mounted device may include a vehicle speed sensor, and when acquiring the vehicle speed of the vehicle, the vehicle speed of the vehicle may be acquired by the speed sensor.
S26: the speed of a motor vehicle is greater than a preset speed threshold value, and a detection signal returned when a signal transmitted by a radar touches an obstacle is acquired at night.
The preset speed threshold value can be set according to requirements, for example, the speed threshold value is 30 km/h.
Preferably, the road danger prompting method further includes:
judging whether the navigation signal is positioned on an expressway or not according to the navigation signal; when the radar is located on the highway, a detection signal returned by the fact that a signal transmitted by the radar meets an obstacle is obtained.
The position of the vehicle can be obtained according to the navigation signal, and whether the vehicle is located on the highway or not is further identified.
S27: and calculating the distance and the direction of the obstacle according to the detection signal.
S28: and sending out a prompt signal to prompt a driver to pay attention to safety when the distance and the direction of the obstacle reach preset safety thresholds.
The road danger prompting method provided by the embodiment can prompt road danger at a required moment, and saves working electric energy of vehicle-mounted equipment.
Referring to fig. 4, a road danger prompting device 30 for prompting a user when a road condition is dangerous is provided according to a third embodiment of the present application, and the road danger prompting device 30 is applied to a vehicle-mounted device. The road danger prompting device 30 may implement the road danger prompting method of any of the foregoing embodiments, and the road danger prompting device 30 includes:
a detection signal obtaining module 31, configured to obtain a detection signal returned when a signal transmitted by the radar hits an obstacle;
a calculation module 32, configured to calculate a distance and a direction of the obstacle according to the detection signal;
and the prompting module 33 is configured to send a prompting signal to prompt the driver to pay attention to safety when the distance and the direction of the obstacle reach a preset safety threshold.
The road danger prompting device provided by the embodiment acquires a detection signal returned by a radar when a signal transmitted by a radar touches an obstacle; calculating the distance and the direction of the obstacle according to the detection signal; when the distance and the direction of the obstacle reach preset safety threshold values, a prompt signal is sent out to prompt a driver to pay attention to safety, the state of the road obstacle can be intelligently judged, a prompt is sent out when the road is dangerous, the driver is warned, and safe driving of the driver is improved.
Preferably, the road danger prompting device 30 further includes:
the generating module is used for generating an isolation belt extension curve according to the distance and the direction of the isolation belt, wherein the isolation belt extension curve is a position and a change curve of the isolation belt on a preset map;
and the first display module is used for displaying the extension curve of the isolation belt.
Preferably, the first display module is further configured to control the display device to display the extension curve of the isolation strip.
Preferably, the prompt module 33 is specifically configured to send a prompt signal when the distance of the isolation zone at the preset angle in front of the vehicle is smaller than a preset distance threshold; or when the bending program of the extension curve of the isolation belt is larger than a preset bending threshold value, sending a prompt signal.
Preferably, the calculation module 32 comprises:
the identification unit is used for identifying that the phase difference of the signals received by the first receiving antenna and the second receiving antenna is b and the time difference t between the time of the signal transmitted by the transmitting antenna and the time of the signal received by the first receiving antenna is t according to the detection signal;
and the calculation unit is used for calculating the azimuth angle of the direction of the obstacle according to the receiving antenna distance d and the phase difference b, and calculating the distance of the obstacle according to the time difference t and the speed of light.
Preferably, the road danger prompting device 30 further includes:
the navigation signal acquisition module is used for controlling the navigation module to acquire a navigation signal;
and the second display module is used for displaying the current road track according to the navigation signal and a preset navigation map.
Preferably, the road danger prompting device 30 further includes:
and the judging module is used for judging whether the navigation signal is positioned on an expressway or not according to the navigation signal.
The detection signal obtaining module 31 is further configured to obtain a detection signal returned by the radar when the signal is in the highway and meets an obstacle.
Preferably, the road danger prompting device 30 further includes:
the optical signal acquisition module controls the photosensitive sensor to acquire an optical signal;
the identification module is used for identifying day or night according to the optical signal;
the vehicle speed acquisition module is used for acquiring the vehicle speed of the vehicle;
the detection signal obtaining module 31 is further configured to obtain a detection signal returned by the radar when the vehicle speed is greater than a preset speed threshold and the signal transmitted by the radar hits the obstacle at night.
The product can execute the method provided by any embodiment of the application, and has the corresponding functional module and the beneficial effect of the execution method.
Referring to fig. 4, a fourth embodiment of the present application further provides an on-board device and a storage medium, which both have the corresponding effects of the road danger prompting method provided in the foregoing embodiments of the present application.
The vehicle-mounted device provided by the embodiment of the application is installed on a vehicle and comprises a memory 41 and a processor 42, wherein a road danger prompting program is stored in the memory 41, and the processor 42 implements the following steps when executing the road danger prompting program stored in the memory 41:
acquiring a detection signal returned by a radar when a signal transmitted by a radar touches an obstacle;
calculating the distance and the direction of the obstacle according to the detection signal;
and sending out a prompt signal to prompt a driver to pay attention to safety when the distance and the direction of the obstacle reach preset safety thresholds.
Preferably, the processor of the vehicle-mounted device further implements the following steps when executing the road danger prompting program stored in the memory: generating an isolation zone extension curve according to the distance and the direction of the isolation zone, wherein the isolation zone extension curve is a position and a change curve of the isolation zone on a preset map; and displaying the extension curve of the isolation belt.
Preferably, the processor of the vehicle-mounted device further implements the following steps when executing the road danger prompting program stored in the memory: generating an isolation zone extension curve according to the distance and the direction of the isolation zone, wherein the isolation zone extension curve is a position and a change curve of the isolation zone on a preset map; and controlling the display device to display the extension curve of the isolation belt.
Preferably, the processor of the vehicle-mounted device further implements the following steps when executing the road danger prompting program stored in the memory: when the distance of the isolation belt at a preset angle in front of the vehicle is smaller than a preset distance threshold value, sending a prompt signal; or when the bending program of the extension curve of the isolation belt is larger than a preset bending threshold value, sending a prompt signal.
Preferably, the processor of the vehicle-mounted device further implements the following steps when executing the road danger prompting program stored in the memory: identifying the phase difference of the signals received by the first receiving antenna and the second receiving antenna as b and the time difference t between the time of the signal transmitted by the transmitting antenna and the time of the signal received by the first receiving antenna according to the detection signal; and calculating the azimuth angle of the direction of the obstacle according to the receiving antenna distance d and the phase difference b, and calculating the distance of the obstacle according to the time difference t and the speed of light.
Preferably, the processor of the vehicle-mounted device further implements the following steps when executing the road danger prompting program stored in the memory: controlling the navigation module to acquire a navigation signal; and displaying the current road track according to the navigation signal and a preset navigation map.
Preferably, the processor of the vehicle-mounted device further implements the following steps when executing the road danger prompting program stored in the memory: judging whether the navigation signal is positioned on an expressway or not according to the navigation signal; when the radar is located on the highway, a detection signal returned by the fact that a signal transmitted by the radar meets an obstacle is obtained.
Preferably, the processor of the vehicle-mounted device further implements the following steps when executing the road danger prompting program stored in the memory: controlling the photosensitive sensor to acquire an optical signal; identifying whether the day or the night is according to the optical signal; acquiring the speed of a vehicle; the speed of a motor vehicle is greater than a preset speed threshold value, and a detection signal returned when a signal transmitted by a radar touches an obstacle is acquired at night.
A storage medium provided in an embodiment of the present application is a computer-readable storage medium, in which a road danger prompting program is stored, and when the road danger prompting program is executed by a processor, the following steps are specifically implemented:
acquiring a detection signal returned by a radar when a signal transmitted by a radar touches an obstacle;
calculating the distance and the direction of the obstacle according to the detection signal;
and sending out a prompt signal to prompt a driver to pay attention to safety when the distance and the direction of the obstacle reach preset safety thresholds.
Preferably, the road danger prompting program stored in the computer readable storage medium, when executed by the processor, further implements the following steps: generating an isolation zone extension curve according to the distance and the direction of the isolation zone, wherein the isolation zone extension curve is a position and a change curve of the isolation zone on a preset map; and displaying the extension curve of the isolation belt.
Preferably, the road danger prompting program stored in the computer readable storage medium, when executed by the processor, further implements the following steps: generating an isolation zone extension curve according to the distance and the direction of the isolation zone, wherein the isolation zone extension curve is a position and a change curve of the isolation zone on a preset map; and controlling the display device to display the extension curve of the isolation belt.
Preferably, the road hazard prompting program stored in the computer readable storage medium, when executed by the processor, implements the following steps: when the distance of the isolation belt at a preset angle in front of the vehicle is smaller than a preset distance threshold value, sending a prompt signal; or when the bending program of the extension curve of the isolation belt is larger than a preset bending threshold value, sending a prompt signal.
Preferably, the road hazard prompting program stored in the computer readable storage medium, when executed by the processor, implements the following steps: identifying the phase difference of the signals received by the first receiving antenna and the second receiving antenna as b and the time difference t between the time of the signal transmitted by the transmitting antenna and the time of the signal received by the first receiving antenna according to the detection signal; and calculating the azimuth angle of the direction of the obstacle according to the receiving antenna distance d and the phase difference b, and calculating the distance of the obstacle according to the time difference t and the speed of light.
Preferably, the road hazard prompting program stored in the computer readable storage medium, when executed by the processor, implements the following steps: controlling the navigation module to acquire a navigation signal; and displaying the current road track according to the navigation signal and a preset navigation map.
Preferably, the road hazard prompting program stored in the computer readable storage medium, when executed by the processor, implements the following steps: judging whether the navigation signal is positioned on an expressway or not according to the navigation signal; when the radar is located on the highway, a detection signal returned by the fact that a signal transmitted by the radar meets an obstacle is obtained.
Preferably, the road hazard prompting program stored in the computer readable storage medium, when executed by the processor, implements the following steps: controlling the photosensitive sensor to acquire an optical signal; identifying whether the day or the night is according to the optical signal; acquiring the speed of a vehicle; the speed of a motor vehicle is greater than a preset speed threshold value, and a detection signal returned when a signal transmitted by a radar touches an obstacle is acquired at night.
The computer-readable storage medium includes Random Access Memory (RAM), Memory, Read-Only Memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, removable disk, Compact disk Read-Only Memory (CD-ROM), or any other form of storage medium known in the art.
For a description of relevant parts in a road danger prompting method, a road danger prompting device, a vehicle-mounted device, and a computer-readable storage medium provided in the embodiments of the present application, reference is made to detailed descriptions of corresponding parts in a road danger prompting method provided in the foregoing embodiments of the present application, and details are not repeated here. In addition, parts of the above technical solutions provided in the embodiments of the present application, which are consistent with the implementation principles of corresponding technical solutions in the prior art, are not described in detail so as to avoid redundant description.
The modules or units described in the embodiments of the present application may be implemented by software or hardware. Where the name of an element does not in some cases constitute a limitation on the element itself.
The above description is only a preferred embodiment of the present application, and not intended to limit the scope of the present application, and all modifications of equivalent structures and equivalent processes, which are made by the contents of the specification and the drawings of the present application, or which are directly or indirectly applied to other related technical fields, are also included in the scope of the present application.
Claims (10)
1. A road danger prompting method is applied to vehicle-mounted equipment and is characterized by comprising the following steps:
acquiring a detection signal returned by a radar when a signal transmitted by a radar touches an obstacle;
calculating the distance and the direction of the obstacle according to the detection signal;
and sending out a prompt signal to prompt a driver to pay attention to safety when the distance and the direction of the obstacle reach preset safety thresholds.
2. The road danger prompting method according to claim 1, wherein the obstacle is a median, and before the prompting signal is sent when the distance and the direction of the obstacle reach preset safety thresholds, the road danger prompting method further comprises:
generating an isolation zone extension curve according to the distance and the direction of the isolation zone, wherein the isolation zone extension curve is a position and a change curve of the isolation zone on a preset map;
and displaying the extension curve of the isolation belt.
3. The road danger prompting method according to claim 2, wherein the sending out a prompting signal when the distance and the direction of the obstacle reach a preset safety threshold comprises:
when the distance of the isolation belt at a preset angle in front of the vehicle is smaller than a preset distance threshold value, sending a prompt signal; or
And sending out a prompt signal when the bending program of the extension curve of the isolation belt is greater than a preset bending threshold value.
4. The method for road hazard prompting according to claim 1, wherein the radar includes a transmitting antenna, a first receiving antenna and a receiving antenna, a receiving antenna distance between the first receiving antenna and the second receiving antenna is d, and the calculating the distance and direction of the obstacle from the detection signal includes:
identifying the phase difference of the signals received by the first receiving antenna and the second receiving antenna as b and the time difference t between the time of the signal transmitted by the transmitting antenna and the time of the signal received by the first receiving antenna according to the detection signal;
and calculating the azimuth angle of the direction of the obstacle according to the receiving antenna distance d and the phase difference b, and calculating the distance of the obstacle according to the time difference t and the speed of light.
5. The road danger prompting method according to claim 1, wherein the vehicle-mounted device includes a navigation module, and before the signal transmitted by the radar is acquired to encounter a detection signal returned by an obstacle, the road danger prompting method further includes:
controlling the navigation module to acquire a navigation signal;
and displaying the current road track according to the navigation signal and a preset navigation map.
6. The road hazard prompting method according to claim 5, further comprising:
judging whether the navigation signal is positioned on an expressway or not according to the navigation signal;
when the radar is located on the highway, a detection signal returned by the fact that a signal transmitted by the radar meets an obstacle is obtained.
7. The road hazard prompting method according to claim 1, characterized in that: the vehicle-mounted equipment comprises a photosensitive sensor, and before the signal transmitted by the radar is acquired to meet a detection signal returned by an obstacle, the road danger prompting method further comprises the following steps:
controlling the photosensitive sensor to acquire an optical signal;
identifying whether the day or the night is according to the optical signal;
acquiring the speed of a vehicle;
the speed of a motor vehicle is greater than a preset speed threshold value, and a detection signal returned when a signal transmitted by a radar touches an obstacle is acquired at night.
8. The utility model provides a dangerous suggestion device of road, is applied to on-vehicle equipment, dangerous suggestion device of road includes:
the detection signal acquisition module is used for acquiring a detection signal returned by a radar when the signal is collided with an obstacle;
the calculation module is used for calculating the distance and the direction of the obstacle according to the detection signal;
and the prompting module is used for sending out a prompting signal when the distance and the direction of the barrier reach preset safety threshold values so as to prompt a driver to pay attention to safety.
9. An in-vehicle apparatus characterized by comprising:
the memory is used for storing a road danger prompting program;
a processor for implementing the road hazard prompting method according to any one of claims 1 to 7 when executing the road hazard prompting program.
10. A storage medium which is a computer-readable storage medium, wherein a road danger prompting program is stored in the storage medium, and when executed by a processor, the road danger prompting program implements the road danger prompting method according to any one of claims 1 to 7.
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Application publication date: 20200211 |