CN112180366A - System and method for detecting vehicle overload - Google Patents
System and method for detecting vehicle overload Download PDFInfo
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- CN112180366A CN112180366A CN202011049517.1A CN202011049517A CN112180366A CN 112180366 A CN112180366 A CN 112180366A CN 202011049517 A CN202011049517 A CN 202011049517A CN 112180366 A CN112180366 A CN 112180366A
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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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K28/00—Safety devices for propulsion-unit control, specially adapted for, or arranged in, vehicles, e.g. preventing fuel supply or ignition in the event of potentially dangerous conditions
- B60K28/08—Safety devices for propulsion-unit control, specially adapted for, or arranged in, vehicles, e.g. preventing fuel supply or ignition in the event of potentially dangerous conditions responsive to conditions relating to the cargo, e.g. overload
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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
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Abstract
The application discloses a system and a method for detecting vehicle overload, and belongs to the technical field of vehicles. The system comprises a millimeter wave radar module and a vehicle body control module, wherein the millimeter wave radar module is connected with the vehicle body control module, and the millimeter wave radar module is connected with the vehicle body control module, wherein: the millimeter wave radar module is used for sending a transmitting signal and receiving a reflected signal, determining the number of people in the vehicle according to the transmitting signal and the reflected signal, and sending the number of people to the vehicle body control module; and the vehicle body control module is used for forbidding the vehicle door to be locked when the number of people is more than or equal to the minimum number of overload people. This application can pass through the accurate number of people that detects in the vehicle of millimeter wave radar module, and then confirm whether the vehicle overloads, has solved among the prior art problem that can't the accurate determination vehicle overloads.
Description
Technical Field
The present application relates to the field of vehicle technology, and more particularly, to a system and method for detecting vehicle overload.
Background
With the rapid development of the automobile industry and the continuous improvement of the living standard of people, automobiles gradually enter into millions of ordinary families.
In the related art, the number of people in the vehicle is often detected by a camera mounted in the vehicle, specifically, the camera mounted in the vehicle takes an image of the interior of the vehicle to obtain an image of the interior of the vehicle, and recognizes faces on the image, and the number of the recognized faces is taken as the number of people in the vehicle.
In the process of implementing the present application, the inventors found that the above process has at least the following problems:
in the above process, the covered human face cannot be identified, so that the number of people in the detected vehicle is not the number of people in the actual vehicle, the number of people in the vehicle cannot be accurately detected, and whether the vehicle is overloaded or not cannot be accurately determined.
Disclosure of Invention
The embodiment of the application provides a system and a method for detecting vehicle overload, which can solve the problem that whether a vehicle is overloaded cannot be accurately determined in the prior art. The technical scheme is as follows:
in a first aspect, an embodiment of the present application provides a system for detecting vehicle overload, where the system includes a millimeter wave radar module and a vehicle body control module, where the millimeter wave radar module is connected to the vehicle body control module, and where:
the millimeter wave radar module is used for sending a transmitting signal and receiving reflection information, determining the number of people in the vehicle according to the transmitting signal and the reflection information, and sending the number of people to the vehicle body control module;
and the vehicle body control module is used for forbidding the vehicle door to be locked when the number of people is more than or equal to the minimum number of overload people.
Optionally, the millimeter wave radar module is configured to:
determining a reflection signal carrying Doppler frequency according to the reflection frequency of each reflection signal;
determining position information corresponding to the reflection signal carrying the Doppler frequency based on the reflection signal carrying the Doppler frequency;
determining a human body position area based on position information corresponding to the reflection signal carrying the Doppler frequency;
and determining the number of people in the vehicle according to the plurality of human body position areas.
Optionally, the millimeter wave radar module is configured to:
determining a distance and an angle corresponding to the reflection signal carrying the Doppler frequency based on the reflection signal carrying the Doppler frequency;
and determining the position information corresponding to the reflection signal carrying the Doppler frequency according to the distance and the angle corresponding to the reflection signal carrying the Doppler frequency.
Optionally, the system further comprises a keyless entry and start PEPS module, and the PEPS module is configured to:
determining whether an engine of the vehicle is started when the number of people is greater than or equal to a minimum overloaded number of people;
prohibiting an engine of the vehicle from starting if the engine is not started;
controlling an engine of the vehicle to be turned off if the engine has been started.
Optionally, the millimeter wave radar module includes a first millimeter wave radar module and a second millimeter wave radar module;
the first millimeter wave radar module is used for determining a first number of users in a first preset area in the vehicle;
the second millimeter wave radar module is used for determining a second number of users in a second preset area in the vehicle;
the vehicle body control module is used for forbidding the vehicle door to be locked when the sum of the first number of people and the second number of people is larger than or equal to the minimum overload number of people.
Optionally, the system further comprises a human-computer interaction module;
the millimeter wave radar module is also used for sending the number of people to the man-machine interaction module;
and the human-computer interaction module is used for receiving the number of people and displaying the number of people on a display screen of the vehicle.
In a second aspect, an embodiment of the present application provides a method for detecting vehicle overload, the method including:
the millimeter wave radar module determines the number of people in the vehicle according to the transmitting signal and the reflected signal and sends the number of people to the vehicle body control module;
the vehicle body control module determines that the number of people is larger than or equal to the minimum overload number of people and controls the vehicle door not to be locked.
Optionally, after the vehicle body control module receives the number of people sent by the millimeter wave radar module, the method further includes:
when the vehicle body control module determines that the number of people is less than the minimum overload number of people, and after all doors of the vehicle are detected to be closed, the millimeter wave radar module is closed.
Optionally, the at least one millimeter wave radar detects a number of people in the vehicle, including:
determining a reflection signal carrying Doppler frequency according to the reflection frequency of each reflection signal;
determining position information corresponding to the reflection signal carrying the Doppler frequency based on the reflection signal carrying the Doppler frequency;
determining a human body position area based on position information corresponding to the reflection signal carrying the Doppler frequency;
and determining the number of people in the vehicle according to the plurality of human body position areas.
Optionally, the determining, based on the reflection signal carrying the doppler frequency, the position information corresponding to the reflection signal carrying the doppler frequency includes:
determining a distance and an angle corresponding to the reflection signal carrying the Doppler frequency based on the reflection signal carrying the Doppler frequency;
and determining the position information corresponding to the reflection signal carrying the Doppler frequency according to the distance and the angle corresponding to the reflection signal carrying the Doppler frequency.
Optionally, the method further includes:
determining whether an engine of the vehicle is started when the number of people is greater than or equal to a minimum overloaded number of people;
prohibiting an engine of the vehicle from starting if the engine is not started;
controlling an engine of the vehicle to be turned off if the engine has been started.
The technical scheme provided by the embodiment of the application has the following beneficial effects:
the millimeter wave radar module in the system provided by the embodiment of the application can detect the living body in the vehicle, and then can accurately detect the number of people in the vehicle, and then can accurately determine whether the vehicle is overloaded, and the problem that whether the vehicle is overloaded can not be accurately determined in the prior art is solved. Meanwhile, when the vehicle overload is detected, the door of the vehicle is controlled not to be locked, so that the overloaded vehicle cannot get on the road, and the traffic accidents caused by the vehicle overload are reduced.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a device for detecting vehicle overload according to an embodiment of the present disclosure;
FIG. 2 is a schematic diagram of a method for detecting vehicle overload according to an embodiment of the present disclosure;
FIG. 3 is a schematic diagram of a method for detecting vehicle overload according to an embodiment of the present disclosure;
fig. 4 is a flowchart of a method for detecting vehicle overload according to an embodiment of the present disclosure.
Detailed Description
To make the objects, technical solutions and advantages of the present application more clear, embodiments of the present application will be described in further detail below with reference to the accompanying drawings.
For vehicles mainly carrying passengers, the number of people in the vehicle is often used as the basis for whether the vehicle is overloaded or not. For example, when the number of persons in the vehicle is greater than or equal to the minimum number of persons who are overloaded, it is determined that the vehicle is overloaded. In the prior art, a camera module mounted on a vehicle shoots images in the vehicle, the shot images are subjected to face recognition, and the number of people in the vehicle is determined according to the number of the recognized faces. When the face of the user is shielded, the user cannot be identified, the number of people in the vehicle cannot be accurately determined, and whether the vehicle is overloaded or not cannot be accurately judged. The system provided by the embodiment of the application detects the living body in the vehicle through the millimeter wave radar module, can accurately detect the number of people in the vehicle, and further can accurately determine whether the vehicle is overloaded, and solves the problem that whether the vehicle is overloaded cannot be accurately detected in the prior art. Meanwhile, when the vehicle overload is detected, the door of the vehicle is controlled not to be locked, so that the overloaded vehicle cannot get on the road, and the traffic accidents caused by the vehicle overload are reduced.
Fig. 1 is a schematic structural diagram of a system for detecting vehicle overload according to an embodiment of the present application, where the system includes a millimeter wave radar module and a vehicle body control module, the millimeter wave radar module is connected to the vehicle body control module, where:
the millimeter wave radar module is used for sending a transmitting signal and receiving a reflected signal, determining the number of people in the vehicle according to the transmitting signal and the reflected signal, and sending the number of people to the vehicle body control module;
and the vehicle body control module is used for forbidding the vehicle door to be locked when the number of people is more than or equal to the minimum number of overload people.
Wherein, including at least one millimeter wave radar and calculation module in the millimeter wave radar module, at least one millimeter wave radar can launch millimeter wave signal and receive the millimeter wave signal of reflection for calculation module can determine the number of people in the vehicle according to the millimeter wave signal of transmission and the millimeter wave signal of reflection, and sends it for automobile body control module.
In implementation, when the vehicle body control module detects that the vehicle door is opened, the vehicle body control module sends a starting instruction to the millimeter wave radar module through the CAN bus. And after the millimeter wave radar module receives the starting instruction, the millimeter wave radar module is started. The millimeter wave radar module sends out a transmitting signal and receives a reflected signal, determines the number of people in the vehicle according to the transmitting signal and the reflected signal, and sends the number of people in the vehicle to the vehicle body control module. The vehicle body control module receives the number of people sent by the millimeter wave radar module and compares the number of people with the minimum number of overloaded people. When the number of people is larger than or equal to the minimum overload number of people, the vehicle body control module prohibits the vehicle door from being locked. When the number of people is less than the minimum number of people who overloads, the vehicle door can be locked, and when the vehicle body control module detects that all doors of the vehicle are locked, the vehicle body control module sends a closing instruction to the millimeter wave radar module. And the millimeter wave radar module receives the closing instruction, and the millimeter wave radar module is closed.
The millimeter wave radar module in the system provided by the embodiment of the application can detect the living body in the vehicle, and then can accurately detect the number of people in the vehicle, and whether the vehicle is overloaded is accurately determined, so that the problem that whether the vehicle is overloaded cannot be accurately determined in the prior art is solved. Meanwhile, when the vehicle overload is detected, the door of the vehicle is controlled not to be locked, so that the overloaded vehicle cannot get on the road, and the traffic accidents caused by the vehicle overload are reduced.
Simultaneously, in this application embodiment, when automobile body control module detected that all doors in the vehicle are closed, millimeter wave radar module closed, has saved the electric quantity of vehicle.
Optionally, the millimeter wave radar module determines a reflection signal carrying a doppler frequency according to the reflection frequency of each reflection signal; determining position information corresponding to the reflection signal carrying the Doppler frequency based on the reflection signal carrying the Doppler frequency; determining a human body position area based on position information corresponding to the reflection signal carrying the Doppler frequency; and determining the number of people in the vehicle according to the plurality of human body position areas.
It should be noted that the reflected signal carrying the doppler frequency in the embodiment of the present application is a reflected signal detecting the heart rate of the human body. The step of detecting the reflected signal carrying the doppler frequency may be: and carrying out spectrum analysis on each reflected signal to determine a reflected signal carrying the heart rate frequency, and taking the reflected signal as a reflected signal carrying the Doppler frequency. The human body position region in the embodiment of the present application may be a position region corresponding to a human thorax.
In implementation, according to the receiving frequency of each reflected signal, a reflected signal carrying a doppler frequency, i.e. a first signal, is determined; determining position information corresponding to each first signal according to each first signal; determining a plurality of pieces of position information of which the distance between the pieces of position information is smaller than a preset distance from the pieces of position information corresponding to all the first signals, determining a human body position area containing the plurality of pieces of position information, and further determining the plurality of human body position areas; and determining the number of the plurality of human body position areas as the number of people in the vehicle.
Optionally, based on the reflected signal carrying the doppler frequency, determining a distance and an angle corresponding to the reflected signal carrying the doppler frequency; and determining the position information corresponding to the reflection signal carrying the Doppler frequency according to the distance and the angle corresponding to the reflection signal carrying the Doppler frequency.
It should be noted that the millimeter wave radar module may detect the distance and angle of each reflection point with respect to the millimeter wave radar, and the installation position of the millimeter wave radar is known, so that the position information of each reflection point may be determined according to the distance and angle of each reflection point. Wherein, the reflection point is a position point for reflecting the millimeter wave radar.
In implementation, according to each first signal and a transmitting signal corresponding to each first signal, determining a distance and an angle corresponding to each first signal; and determining a spatial position point corresponding to each first signal according to the distance and the angle corresponding to each first signal and the installation position of the millimeter wave radar module.
Optionally, the vehicle body control module is configured to: when the number of people is more than or equal to the minimum overload number, determining whether an engine of the vehicle is started; prohibiting the engine from starting if the engine of the vehicle is not started; if the engine of the vehicle has been started, the engine is controlled to be shut down.
In the embodiment of the application, when the number of people is greater than or equal to the minimum overload number of people, the vehicle is in an overload state, at the moment, the started engine is closed or the engine is prohibited from being started, so that a driver cannot drive the vehicle to get on the road, and traffic accidents caused by vehicle overload are avoided.
It should be noted that when the number of people is less than the minimum number of people with overload, the vehicle is not overloaded, and the engine can be started normally.
In another embodiment, when the body control module detects that the vehicle door is not locked, determining whether an engine of the vehicle is started; prohibiting the engine from starting if the engine of the vehicle is not started; if the engine of the vehicle has been started, the engine is controlled to be shut down.
Optionally, the millimeter wave radar module includes a first millimeter wave radar module and a second millimeter wave radar module; the first millimeter wave radar module is used for determining a first number of users in a first preset area in the vehicle; the second millimeter wave radar module is used for determining a second number of users in a second preset area in the vehicle; and the vehicle body control module is used for forbidding the vehicle door to be locked when the sum of the first number of people and the second number of people is more than or equal to the minimum overload number of people.
Among them, the detection range of the millimeter wave radar is limited, so that the millimeter wave radar cannot detect every position in the vehicle. Therefore, a plurality of millimeter wave radars may be provided on the vehicle to detect the number of persons in the vehicle. The first millimeter wave radar module may be mounted at a first location of the vehicle, and the second millimeter wave radar module may be mounted at a second location of the vehicle, the first location and the second location being spaced apart by a predetermined distance. For example, the second position may be a position above a first row of seats in the vehicle, and the second position may be a position above a second row of seats in the vehicle. Wherein the vehicle may include two rows of seats.
In implementation, the first millimeter wave radar module determines a first human body position area in a first preset area, and determines a first number of people according to the number of the first human body position area in the first preset area. The second millimeter wave radar module determines a second human body position area in the second preset area, and determines the second number of people according to the number of the second human body position area in the second preset area.
It should be noted that the first preset area may be an area corresponding to a front seat in the vehicle, the second preset area may be an area corresponding to a rear seat in the vehicle, and the first preset area and the second preset area are jointly combined to form the entire area in the vehicle.
Or the first millimeter wave radar module determines a plurality of first human body position areas, and the second millimeter wave radar determines a plurality of second human body position areas. And determining the coincident human body position area according to the first human body position area and the second human body position area, filtering the coincident human body position area, and determining the number of people in the vehicle according to the number of the filtered human body position areas.
For example, as shown in fig. 2, a first millimeter wave radar module is mounted at a position above a first row of seats, and a second millimeter wave radar module is mounted at a position above a second row of seats.
It should be noted that, for a medium-sized and large-sized passenger vehicle, the vehicle includes at least two rows of seats, and the regions in the vehicle can be divided according to the size of the detection region of the millimeter wave radar module, so as to obtain a plurality of preset regions. And each millimeter wave radar module detects the corresponding preset area, and then the number of people in the vehicle is determined according to the number of people detected by each millimeter wave radar module.
Optionally, the millimeter wave radar module is further configured to send the number of people to the human-computer interaction module; and the human-computer interaction module is used for receiving the number of people and displaying the number of people on a display screen of the vehicle.
In implementation, the millimeter wave radar module sends the detected number of people to the human-computer interaction module. The man-machine interaction module is used for displaying the detected number of people on a display screen of the vehicle, so that a driver can know the number of people in the vehicle in time.
Further, the display screen of the vehicle may also display the location of each seat within the vehicle and the number of people corresponding to each seat. The method for determining the number of people corresponding to each seat comprises the following steps: the millimeter wave radar module determines the position of each human body position area, determines the seat corresponding to the position according to each position, further determines the number of people corresponding to each seat, and sends the number of people corresponding to each seat to the human-computer interaction module. And the man-machine interaction module receives the information sent by the millimeter wave radar module and displays the number of people corresponding to each seat on a display screen on the vehicle.
For example, fig. 3 shows the position of the main driver's seat 1 and the position of the main driver's seat 1 corresponding to one person, and the position of the passenger's seat 2, the position corresponding to the rear seat, and the position corresponding to the rear seat. Wherein a circle is used to represent a person.
In one embodiment, when the human-computer interaction module detects that the number of people is greater than or equal to the minimum overload number, an alarm prompt is displayed on a display screen of the vehicle, and an alarm on the vehicle is controlled to send out an overload alarm signal, wherein the voice alarm signal can be a voice prompt such as "warning and vehicle overload" or a beep tone such as "beep and beep". When the vehicle is overloaded, a steering lamp, a small lamp and the like on the vehicle can be lightened to indicate that the vehicle is overloaded for people who do not enter the vehicle
In one embodiment, when the number of people detected by the human-computer interaction module is greater than or equal to the minimum overload number of people, the display interface on the display screen is switched from the first display state to the second display state, and when the number of people is greater than or equal to the minimum overload number of people, the display interface on the display screen is switched from the second display state to the first display state. The color of the first display state is different from the color of the second display state, and the transparency of the first display state is higher than that of the second display state.
For example, the first display state is a white transparent state with a transparency of 100%, and the second display state is a red transparent state with a transparency of 50%.
Fig. 2 is a flowchart of a method for detecting vehicle overload according to an embodiment of the present application, where the method includes:
step 201, the millimeter wave radar module receives a start instruction.
In implementation, when the vehicle body control module detects that the vehicle door is opened, the vehicle body control module sends a starting instruction to the millimeter wave radar module through the CAN bus. And after the millimeter wave radar module receives the starting instruction, the millimeter wave radar module is started.
Step 202, the millimeter wave radar module determines the number of people in the vehicle according to the transmitted radar signal and the received radar signal, and sends the number of people to the vehicle body control module.
Optionally, the millimeter wave radar module determines a reflection signal carrying a doppler frequency according to the reflection frequency of each reflection signal; determining position information corresponding to the reflection signal carrying the Doppler frequency based on the reflection signal carrying the Doppler frequency; determining a human body position area based on position information corresponding to the reflection signal carrying the Doppler frequency; and determining the number of people in the vehicle according to the plurality of human body position areas.
It should be noted that the reflected signal carrying the doppler frequency in the embodiment of the present application is a reflected signal detecting the heart rate of the human body. The step of detecting the reflected signal carrying the doppler frequency may be: and carrying out spectrum analysis on each reflected signal to determine a reflected signal carrying the heart rate frequency, and taking the reflected signal as a reflected signal carrying the Doppler frequency. The human body position region in the embodiment of the present application may be a position region corresponding to a human thorax.
In implementation, according to the receiving frequency of each reflected signal, a reflected signal carrying a doppler frequency, i.e. a first signal, is determined; determining position information corresponding to each first signal according to each first signal; determining position information of which the distance between every two pieces of position information is smaller than a preset distance from all pieces of position information corresponding to the first signals, and further determining a plurality of human body position areas, wherein the distance between the plurality of pieces of position information included by each piece of human body position information is smaller than the preset distance; and determining the number of the plurality of human body position areas as the number of people in the vehicle.
Optionally, the millimeter wave radar module determines a distance and an angle corresponding to the reflection signal carrying the doppler frequency based on the reflection signal carrying the doppler frequency; and determining the position information corresponding to the reflection signal carrying the Doppler frequency according to the distance and the angle corresponding to the reflection signal carrying the Doppler frequency.
It should be noted that the millimeter wave radar module may detect the distance and angle of each reflection point with respect to the millimeter wave radar, and the installation position of the millimeter wave radar is known, so that the position information of each reflection point may be determined according to the distance and angle of each reflection point. Wherein, the reflection point is a position point for reflecting the millimeter wave radar.
In implementation, according to each first signal and a transmitting signal corresponding to each first signal, determining a distance and an angle corresponding to each first signal; and determining a position point corresponding to each first signal according to the distance and the angle corresponding to each first signal and the installation position of the millimeter wave radar module.
And step 203, the vehicle body control module determines that the number of people is more than or equal to the minimum number of overload people and prohibits the vehicle door from being locked.
In implementation, the vehicle body control module receives the number of people sent by the millimeter wave radar module and compares the number of people with the minimum number of people with overload. When the number of people is larger than or equal to the minimum overload number of people, the vehicle body control module prohibits the vehicle door from being locked.
Optionally, when the vehicle body control module determines that the number of people is greater than or equal to the minimum overload number of people, determining whether an engine of the vehicle is started; prohibiting the engine from starting if the engine of the vehicle is not started; if the engine of the vehicle has been started, the engine is controlled to be shut down.
In the embodiment of the application, when the number of people is larger than or equal to the minimum overload number of people, the vehicle is in an overload state, at the moment, the started engine is closed or the engine is prohibited from being started, so that a driver cannot drive the vehicle to get on the road, and traffic accidents caused by vehicle overload are avoided.
Optionally, the millimeter wave radar module includes a first millimeter wave radar module and a second millimeter wave radar module; the method comprises the steps that a first millimeter wave radar module determines a first number of users in a first preset area in a vehicle; the second millimeter wave radar module determines a second number of users in a second preset area in the vehicle; and when the vehicle body control module detects that the sum of the first number of people and the second number of people is more than or equal to the minimum overload number of people, the vehicle door is forbidden to be locked.
In implementation, the first millimeter wave radar module determines a first human body position area in a first preset area, and determines a first number of people according to the number of the first human body position area in the first preset area. The second millimeter wave radar module determines a second human body position area in the second preset area, and determines the second number of people according to the number of the second human body position area in the second preset area.
It should be noted that the first preset area may be an area corresponding to a front seat in the vehicle, the second preset area may be an area corresponding to a rear seat in the vehicle, and the first preset area and the second preset area are jointly combined to form the entire area in the vehicle.
Or the first millimeter wave radar module determines a plurality of first human body position areas, and the second millimeter wave radar determines a plurality of second human body position areas. And determining the coincident human body position areas according to the first human body position area and the second human body position area, filtering the coincident human body position areas, and determining the number in the vehicle according to the number of the filtered human body position areas.
And step 204, when the number of people detected by the vehicle body control module is less than the minimum overload number of people and all doors of the vehicle are detected to be closed, closing the millimeter wave radar module.
The millimeter wave radar module in the method provided by the embodiment of the application can detect the living body in the vehicle, so that the number of people in the vehicle can be accurately detected, and the problem that whether the vehicle is overloaded or not can not be accurately determined in the prior art is solved. Meanwhile, when the vehicle overload is detected, the door of the vehicle is controlled not to be locked, so that the overloaded vehicle cannot get on the road, and the traffic accidents caused by the vehicle overload are reduced.
The above description is only exemplary of the present application and should not be taken as limiting, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (10)
1. A system for detecting vehicle overload, the system comprising a millimeter wave radar module and a body control module, the millimeter wave radar module and the body control module being connected, wherein:
the millimeter wave radar module is used for sending a transmitting signal and receiving a reflected signal, determining the number of people in the vehicle according to the transmitting signal and the reflected signal, and sending the number of people to the vehicle body control module;
and the vehicle body control module is used for forbidding the vehicle door to be locked when the number of people is more than or equal to the minimum number of overload people.
2. The system of claim 1, wherein the millimeter wave radar module is configured to:
determining a reflection signal carrying Doppler frequency according to the reflection frequency of each reflection signal;
determining position information corresponding to the reflection signal carrying the Doppler frequency based on the reflection signal carrying the Doppler frequency;
determining a human body position area based on position information corresponding to the reflection signal carrying the Doppler frequency;
and determining the number of people in the vehicle according to the plurality of human body position areas.
3. The system of claim 1, wherein the millimeter wave radar module is configured to:
determining a distance and an angle corresponding to the reflection signal carrying the Doppler frequency based on the reflection signal carrying the Doppler frequency;
and determining the position information corresponding to the reflection signal carrying the Doppler frequency according to the distance and the angle corresponding to the reflection signal carrying the Doppler frequency.
4. The system of claim 1, wherein the body control module is further configured to:
determining whether an engine of the vehicle is started when the number of people is greater than or equal to a minimum overloaded number of people;
prohibiting an engine of the vehicle from starting if the engine is not started;
controlling an engine of the vehicle to be turned off if the engine has been started.
5. The system of claim 1, wherein the millimeter wave radar module comprises a first millimeter wave radar module and a second millimeter wave radar module;
the first millimeter wave radar module is used for determining a first number of users in a first preset area in the vehicle;
the second millimeter wave radar module is used for determining a second number of users in a second preset area in the vehicle;
the vehicle body control module is used for forbidding the vehicle door to be locked when the sum of the first number of people and the second number of people is larger than or equal to the minimum overload number of people.
6. The system of claim 1, further comprising a human-machine interaction module;
the millimeter wave radar module is also used for sending the number of people to the man-machine interaction module;
and the human-computer interaction module is used for receiving the number of people and displaying the number of people on a display screen of the vehicle.
7. A method for detecting vehicle overload, the method comprising:
the millimeter wave radar module determines the number of people in the vehicle according to the transmitting signal and the reflected signal and sends the number of people to the vehicle body control module;
the vehicle body control module determines that the number of people is larger than or equal to the minimum overload number of people and controls the vehicle door not to be locked.
8. The method of claim 7, wherein the at least one millimeter wave radar detects a number of people within the vehicle, comprising:
determining a reflection signal carrying Doppler frequency according to the reflection frequency of each reflection signal;
determining position information corresponding to the reflection signal carrying the Doppler frequency based on the reflection signal carrying the Doppler frequency;
determining a human body position area based on position information corresponding to the reflection signal carrying the Doppler frequency;
and determining the number of people in the vehicle according to the plurality of human body position areas.
9. The method of claim 7, wherein determining the position information corresponding to the reflection signal with the doppler frequency based on the reflection signal with the doppler frequency comprises:
determining a distance and an angle corresponding to the reflection signal carrying the Doppler frequency based on the reflection signal carrying the Doppler frequency;
and determining the position information corresponding to the reflection signal carrying the Doppler frequency according to the distance and the angle corresponding to the reflection signal carrying the Doppler frequency.
10. The method of claim 7, wherein after the body control module receives the number of people sent by the millimeter wave radar module, further comprising:
when the vehicle body control module determines that the number of people is less than the minimum overload number of people, and after all doors of the vehicle are detected to be closed, the millimeter wave radar module is closed.
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