CN109733357B - Automobile safety braking system based on seat induction and braking method thereof - Google Patents
Automobile safety braking system based on seat induction and braking method thereof Download PDFInfo
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- CN109733357B CN109733357B CN201811621365.0A CN201811621365A CN109733357B CN 109733357 B CN109733357 B CN 109733357B CN 201811621365 A CN201811621365 A CN 201811621365A CN 109733357 B CN109733357 B CN 109733357B
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Abstract
The invention discloses an automobile safety braking system based on seat induction, and relates to the technical field of safe driving.
Description
Technical Field
The invention relates to the technical field of safe driving, in particular to an automobile safety braking system based on seat induction, which is particularly suitable for the condition of parking braking when a driver is not at a driving position, so that an automobile can be always in a safe state.
Background
Most of the current vehicles rely on the braking of the automobile by hydraulic, pneumatic, mechanical, etc. braking systems. All these braking systems receive signals directly from the driver and make decisions and are therefore operated entirely manually. When the driver sees an obstacle or any vehicle in front of the driving vehicle, he may become irritated or confused. For this reason, the driver cannot properly apply the corresponding brake, and a driving risk is easily generated. Furthermore, the driver may not be able to concentrate on the night trip, especially in the case of traffic congestion, where the distance to the leading vehicle is generally very close, and thus there are many opportunities for accidents to occur. After an accident, there is a great possibility that the vehicle may be damaged. In vehicles currently in use, the bumpers typically used are of the rigid type. These bumpers have a certain capacity and when the range of unintentional forces is very high, the bumper is damaged and these forces are transmitted to the driver or passenger. Thus, in this system, there is no opportunity to reduce vehicle and passenger damage.
U.S. patent publication No. US20060028065a1 discloses smart braking systems and methods. A distance, speed and direction sensitive processor is coupled into the brake controller. The processor executes instructions to compare actual vehicle performance to a deceleration profile and to modulate the brake controller to conform vehicle performance to the deceleration profile. The range information is provided by radar sensors for long ranges, ultrasonic sensors for medium ranges and wheel rotation sensors for short ranges. The speed information is provided by an onboard sensor or calculated by a processor based on distance. The directional information is provided by an on-board switch or determined by a processor based on distance. The brake controller includes a hold valve and a bleed valve, each modulated with a pulse train signal.
Chinese patent publication No. CN103481857A discloses an automatic auxiliary system for automobile braking and a control method thereof, the auxiliary system includes a power module and an electronic controller, the electronic controller is respectively connected with a road surface selection unit, a vehicle speed monitoring device, a road surface humidity sensor, a distance measuring sensor, an alarm module and a brake parachute system, and the power module provides power for the electronic controller and the brake parachute system. The control method comprises the following steps: the electronic controller calculates the safe driving distance according to the current vehicle speed and the road driving environment, measures the relation between the current actual distance and the safe distance through the distance measuring sensor, and sends out a proper control command according to the relation between the current actual distance and the safe distance. The invention has the characteristics that the driving environment is monitored in real time and all-around, the driving pressure of a driver can be reduced, and the safe driving under different environment road surfaces is ensured.
The two systems can realize automatic braking of the automobile, but are mainly applied to the condition that a driver easily forgets to pull a hand brake after leaving a driving position in a short-time parking state, which cannot be effectively solved.
Disclosure of Invention
The invention aims to provide an automobile safety braking system based on seat induction, so as to solve the defects caused in the prior art.
A seat sensing based automobile safety braking system comprises
The pressure sensor is arranged on an automobile seat and used for detecting whether a person is on the automobile seat, and the automobile seat is a driving seat;
the ultrasonic distance sensor is arranged on a front bumper of the automobile and is used for detecting the distance between the ultrasonic distance sensor and the front automobile;
the air compressor is connected with the engine and used for generating compressed air;
the air storage tank is connected with the air compressor and receives and stores compressed air from the air compressor;
the limiting switch is connected with two electromagnetic valves, namely a first electromagnetic valve and a second electromagnetic valve, the input ends of the first electromagnetic valve and the second electromagnetic valve are both connected to the air storage tank, in addition, the output end of the first electromagnetic valve is connected to a brake chamber of an automobile, and the output end of the second electromagnetic valve is connected to the atmosphere;
the main controller is respectively connected with the pressure sensor, the ultrasonic distance sensor, the air compressor and the limit switch, receives signals sent by the pressure sensor and the ultrasonic distance sensor and judges whether to implement air braking according to the signals, the braking mode is that an exhaust valve of the air storage tank is opened through the limit switch, a first electromagnetic valve is opened at the same time to enable the braking chamber to obtain compressed air for braking, the braking release is that the exhaust valve of the air storage tank is closed through the limit switch, and a second electromagnetic valve is opened at the same time to enable the braking chamber to lack the compressed air for braking;
the disc brake is connected with a cylinder, the cylinder is connected with a relay, the relay is connected with an analysis module, the analysis module is connected to a main controller, the analysis module is used for judging whether the automobile is temporarily stopped or parked, and the analysis module is judged by a time interval T when the main controller receives a signal sent by a pressure sensor:
if T is less than or equal to T and T is a preset time value, the main controller transmits the information to the analysis module, the analysis module judges that the vehicle is stopped temporarily, the main controller does not send a signal to the relay, and the air cylinder and the disc brake do not work;
if T is larger than T, the main controller transmits the information to the analysis module, the analysis module judges that the parking state is achieved, the main controller sends a signal to the relay, the air cylinder is started, the disc brake is pushed to the working position, and braking is conducted.
Preferably, the emergency brake further comprises an emergency switch which is connected with the main controller and used for releasing the brake in case of emergency.
Preferably, t is 2min or 3 min.
Preferably, the main controller is further connected to a seat belt detection sensor of the main driver's seat for detecting whether a seat belt is fastened.
Preferably, the main controller is further connected with a signal prompting module, and the signal prompting module is used for sending out 2-3s of prompting information to prompt a driver that the safety belt is not fastened under the condition that the safety belt of the main driving seat is not fastened.
Preferably, the signal prompt module is a buzzer or a warning lamp, and the prompt information corresponds to sound emitted by the buzzer or flashing light emitted by the warning lamp.
A method for braking an automobile by using the automobile safety braking system based on seat induction comprises the following specific steps:
the pressure sensor senses pressure change on a main driving position and gives a signal to the main controller, when a driver leaves the driving position, the main controller controls the limit switch to open an exhaust valve and a first electromagnetic valve of the air storage tank, compressed air is obtained in the brake chamber, the automobile starts air braking, otherwise, the main controller controls the limit switch to close the exhaust valve of the air storage tank and open a second electromagnetic valve at the same time, the compressed air is exhausted into the atmosphere, and the air braking is released;
when T & gt T of a signal sent by the pressure sensor is received by the main controller, the main controller transmits the information to the analysis module, the analysis module judges that the parking state is achieved, the main controller sends a signal to the relay, the air cylinder is started and pushes the disc brake to a working position to perform parking braking, meanwhile, an exhaust valve of the air storage tank is closed, a second electromagnetic valve is opened, and air braking is relieved;
if the distance L between the automobile and the front automobile is less than 2m in the driving process, the main controller can forcibly start the air brake to implement auxiliary braking.
The invention has the advantages that:
(1) the air brake system can automatically judge whether a person is on a driving position, and if the person is not on the driving position, the air brake system starts air brake, so that the vehicle is prevented from skidding or running, and the safety of short-time parking is improved;
(2) the invention also adds a disc brake mode, namely when no person is in the driving position and a certain time is reached, the main controller automatically starts disc brake to perform parking brake, and simultaneously closes air brake, thereby reducing the capacity loss and the damage to an air brake execution component, and improving the safety and the intellectualization of parking compared with the traditional manual brake mode;
(3) the invention also adds a safety belt unfastening prompt to remind a driver of unfastening the safety belt and ensure the driving safety.
Drawings
Fig. 1 is a schematic block diagram of the present invention.
Fig. 2 is a system layout diagram of the present invention.
FIG. 3 is a flow chart of the method of the present invention.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
As shown in fig. 1 to 3, a seat sensing-based safety brake system for a vehicle includes
The pressure sensor is arranged on an automobile seat and used for detecting whether a person is on the automobile seat, and the automobile seat is a driving seat;
the ultrasonic distance sensor is arranged on a front bumper of the automobile and is used for detecting the distance between the ultrasonic distance sensor and the front automobile; other similar sensors for distance measurement can also be adopted, and the functions of the invention can be realized;
the air compressor is connected with the engine and used for generating compressed air, and the opening of the air compressor is judged and executed by a control system of the automobile;
the air storage tank is connected with the air compressor and receives and stores compressed air from the air compressor;
the limiting switch is connected with two electromagnetic valves, namely a first electromagnetic valve and a second electromagnetic valve, the input ends of the first electromagnetic valve and the second electromagnetic valve are both connected to the air storage tank, in addition, the output end of the first electromagnetic valve is connected to a brake chamber of an automobile, and the output end of the second electromagnetic valve is connected to the atmosphere;
the main controller is respectively connected with the pressure sensor, the ultrasonic distance sensor, the air compressor and the limit switch, receives signals sent by the pressure sensor and the ultrasonic distance sensor and judges whether to implement air braking according to the signals, the braking mode is that an exhaust valve of the air storage tank is opened through the limit switch, a first electromagnetic valve is opened at the same time to enable the braking chamber to obtain compressed air for braking, the braking release is that the exhaust valve of the air storage tank is closed through the limit switch, and a second electromagnetic valve is opened at the same time to enable the braking chamber to lack the compressed air for braking;
the disc brake is connected with a cylinder, the cylinder is connected with a relay, the relay is connected with an analysis module, the analysis module is connected to a main controller, the analysis module is used for judging whether the automobile is temporarily stopped or parked, and the analysis module is judged by a time interval T when the main controller receives a signal sent by a pressure sensor:
if T is less than or equal to T and T is a preset time value, the main controller transmits the information to the analysis module, the analysis module judges that the vehicle is stopped temporarily, the main controller does not send a signal to the relay, and the air cylinder and the disc brake do not work;
if T is larger than T, the main controller transmits the information to the analysis module, the analysis module judges that the parking state is achieved, the main controller sends a signal to the relay, the air cylinder is started, the disc brake is pushed to the working position, and braking is conducted.
In the embodiment, an emergency switch is further included, and the emergency switch is connected with the main controller and used for releasing the brake in case of emergency.
In this embodiment, t is 2min or 3min, preferably 2min, and the time interval may be preset as required and operated by a maintenance worker.
In this embodiment, the main controller is also connected to a seat belt detection sensor of the main driver's seat for detecting whether the seat belt is fastened.
In this embodiment, the main controller is further connected to a signal prompt module, the signal prompt module is configured to send out 2-3s of prompt information to prompt a driver that the safety belt is not fastened when the safety belt of the main driving seat is not fastened, the signal prompt module is a buzzer or a warning light, and the prompt information corresponds to sound sent by the buzzer or flashing light sent by the warning light.
A method for braking an automobile by using the automobile safety braking system based on seat induction comprises the following specific steps:
the pressure sensor senses pressure change on a main driving position and gives a signal to the main controller, when a driver leaves the driving position, the main controller controls the limit switch to open an exhaust valve and a first electromagnetic valve of the air storage tank, compressed air is obtained in the brake chamber, the automobile starts air braking, otherwise, the main controller controls the limit switch to close the exhaust valve of the air storage tank and open a second electromagnetic valve at the same time, the compressed air is exhausted into the atmosphere, and the air braking is released;
when T & gt T of a signal sent by the pressure sensor is received by the main controller, the main controller transmits the information to the analysis module, the analysis module judges that the parking state is achieved, the main controller sends a signal to the relay, the air cylinder is started and pushes the disc brake to a working position to perform parking braking, meanwhile, an exhaust valve of the air storage tank is closed, a second electromagnetic valve is opened, and air braking is relieved;
if the distance L between the automobile and the front automobile is less than 2m in the driving process, the main controller can forcibly start the air brake to implement auxiliary braking.
It will be appreciated by those skilled in the art that the invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The embodiments disclosed above are therefore to be considered in all respects as illustrative and not restrictive. All changes which come within the scope of or equivalence to the invention are intended to be embraced therein.
Claims (6)
1. A vehicle safety braking system based on seat sensing, comprising:
the pressure sensor is arranged on an automobile seat and used for detecting whether a person is on the automobile seat, and the automobile seat is a driving seat;
the ultrasonic distance sensor is arranged on a front bumper of the automobile and is used for detecting the distance between the ultrasonic distance sensor and the front automobile;
the air compressor is connected with the engine and used for generating compressed air;
the air storage tank is connected with the air compressor and receives and stores compressed air from the air compressor;
the limiting switch is connected with two electromagnetic valves, namely a first electromagnetic valve and a second electromagnetic valve, the input ends of the first electromagnetic valve and the second electromagnetic valve are both connected to the air storage tank, in addition, the output end of the first electromagnetic valve is connected to a brake chamber of an automobile, and the output end of the second electromagnetic valve is connected to the atmosphere;
the main controller is respectively connected with the pressure sensor, the ultrasonic distance sensor, the air compressor and the limit switch, receives signals sent by the pressure sensor and the ultrasonic distance sensor and judges whether to implement air braking according to the signals, the braking mode is that an exhaust valve of the air storage tank is opened through the limit switch, a first electromagnetic valve is opened at the same time to enable the braking chamber to obtain compressed air for braking, the braking release is that the exhaust valve of the air storage tank is closed through the limit switch, and a second electromagnetic valve is opened at the same time to enable the braking chamber to lack the compressed air for braking;
the disc brake is connected with an air cylinder, the air cylinder is connected with a relay, the relay is connected with an analysis module, the analysis module is connected to a main controller, the analysis module is used for judging whether an automobile is in a temporary parking state or a parking state, the analysis module is judged through a time interval T when the main controller receives a signal sent by a pressure sensor, and the specific judgment and braking method is as follows:
the pressure sensor senses pressure change on a main driving position and gives a signal to the main controller, when a driver leaves the driving position, the main controller controls the limit switch to open an exhaust valve and a first electromagnetic valve of the air storage tank, compressed air is obtained in the brake chamber, the automobile starts air braking, otherwise, the main controller controls the limit switch to close the exhaust valve of the air storage tank and open a second electromagnetic valve at the same time, the compressed air is exhausted into the atmosphere, and the air braking is released;
if T is less than or equal to T and T is a preset time value, the main controller transmits the information to the analysis module, the analysis module judges that the vehicle is stopped temporarily, the main controller does not send a signal to the relay, and the air cylinder and the disc brake do not work;
if T is more than T, the main controller transmits the information to the analysis module, the analysis module judges that the parking state is achieved, the main controller sends a signal to the relay, the air cylinder is started, the disc brake is pushed to a working position, parking braking is carried out, meanwhile, an exhaust valve of the air storage tank is closed, a second electromagnetic valve is opened, and air braking is relieved;
if the distance L between the automobile and the front automobile is less than 2m in the driving process, the main controller can forcibly start the air brake to implement auxiliary braking.
2. The vehicle safety brake system based on seat induction of claim 1, wherein: the emergency brake system further comprises an emergency switch which is connected with the main controller and used for releasing the brake in an emergency.
3. The vehicle safety brake system based on seat induction of claim 1, wherein: the preset time value is 2min or 3 min.
4. The vehicle safety brake system based on seat induction of claim 1, wherein: the main controller is also connected to a seat belt detection sensor of the main driver's seat, which is used to detect whether the seat belt is fastened.
5. The vehicle safety brake system based on seat induction of claim 4, wherein: the main controller is also connected with a signal prompting module which is used for sending out 2-3s of prompting information to prompt a driver that the safety belt is not fastened under the condition that the safety belt of the main driving position is not fastened.
6. The vehicle safety brake system based on seat induction of claim 5, wherein: the signal prompting module is a buzzer or a warning lamp, and the prompting information corresponds to sound emitted by the buzzer or flashing light emitted by the warning lamp.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811621365.0A CN109733357B (en) | 2018-12-28 | 2018-12-28 | Automobile safety braking system based on seat induction and braking method thereof |
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| CN201811621365.0A CN109733357B (en) | 2018-12-28 | 2018-12-28 | Automobile safety braking system based on seat induction and braking method thereof |
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| CN109733357B true CN109733357B (en) | 2021-05-11 |
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