A method for controlling vehicle reversing safety

Abstract

The present invention relates to the field of automobile driving technology, and provides a method for automobile reversing safety control, which aims to utilize the existing vehicle speed, acceleration, throttle position sensor, and electronic throttle on the automobile to realize the safety control function and solve the safety problem of reversing. The method is applied to the automobile reversing safety control system, and the control system includes a signal acquisition module, a control module, and an execution module. The signal acquisition module includes a gear switch collector, a vehicle speed sensor, a vehicle acceleration sensor, and a throttle position sensor, which are used to collect automobile reversing related signals; the control module includes a signal processing submodule and a decision submodule, which are used to receive and process the signal, and output the control signal to the execution module after decision-making; the execution module includes an automobile electronic throttle, a brake device, and a warning light, which are used to realize automobile reversing speed control and early warning. The present invention is particularly suitable for the safety control of automobile reversing, and has high social use value and application prospects.

Description

Technical Field

[0001] The invention relates to the technical field of automobile driving, and in particular to a method for controlling automobile reversing safety. Background Art

[0002] Reversing is inevitable during driving, and it is a necessary operation for all vehicles. The safety of reversing is easily affected by blind spots, subjective errors of the driver, actual road conditions, etc. Although there may be many dangerous situations in reality, the root causes of danger are basically the following three situations:

[0003] (1) Excessive speed;

[0004] (2) The vehicle is travelling at a high speed and the acceleration is too large;

[0005] (3) The acceleration is large and increases too quickly (e.g., when you encounter a protrusion on the road and suddenly step on the accelerator, causing you to suddenly pass over the protrusion).

[0006] Most of the existing safety control methods rely on adding additional reversing radars, ranging sensors, etc. to detect and control obstacles outside the vehicle, which increases the complexity of the system and the cost. To this end, we propose a vehicle reversing safety control method. Summary of the invention

[0007] 1. Technical issues to be resolved

[0008] In view of the shortcomings of the prior art, the present invention provides a method for controlling the safety of automobile reversing, which overcomes the shortcomings of the prior art, has a reasonable design and a compact structure, and aims to utilize the existing vehicle speed, acceleration, throttle position sensors, and electronic throttle on the automobile to achieve a safety control function and solve the safety problem of reversing.

[0009] (II) Technical solution

[0010] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0011] A car reversing safety control system comprises a signal acquisition module, a control module and an execution module, wherein the signal acquisition module comprises a gear switch collector, a car speed sensor, a car acceleration sensor and a throttle position sensor, and is used to collect car reversing related signals;

[0012] The control module includes a signal processing submodule and a decision submodule, which are used to receive and process signals and output control signals to the execution module after making decisions;

[0013] The execution module includes an automobile electronic throttle, a brake device and a warning light, and is used to realize the control of the automobile reverse speed and the light warning.

[0014] Preferably, the gear position switch collector is a position sensor for collecting the position signal of the vehicle gear.

[0015] Based on the vehicle reverse safety control system, the present invention provides a vehicle reverse safety control method, including the following steps:

[0016] Step 1, system initialization;

[0017] Step 2, collect the position signal of the vehicle gear and determine whether it is in the reverse state;

[0018] 2.1) If the vehicle is in the reverse state, collect the vehicle driving speed v, acceleration a, and throttle position signal;

[0019] 2.2) If the vehicle is not in the reverse state, continuously collect the position signal of the vehicle gear;

[0020] Step 3, according to the collected signals, determine the relationship between the vehicle driving speed v and the threshold v1;

[0021] 3.1) If v>v1, perform the opening control of the vehicle electronic throttle, brake control, control the warning light to flash, and return to Step 2;

[0022] 3.2) If v<v1, execute the next step;

[0023] Step 4, according to the collected signals, further determine the relationship between the vehicle acceleration a and the threshold a1, and the relationship between the driving speed v and the thresholds v2 and v1;

[0024] 4.1) If a>a1 and v>v2, perform the opening control of the vehicle electronic throttle, brake control, control the warning light to flash, and return to Step 2;

[0025] 4.2) If either a<a1 or v<v2 is satisfied, execute the next step;

[0026] Step 5, according to the collected signals, calculate the acceleration change rate b of the vehicle, and determine the relationship between b and the threshold b1, and the relationship between the vehicle acceleration a and the threshold a2;

[0027] 5.1) If b>b1 and a>a2, perform the opening control of the vehicle electronic throttle, brake control, control the warning light to flash, and return to Step 2;

[0028] 5.2) If either b<b1 or a<a2 is satisfied, directly return to Step 2.

[0029] Preferably, both v1 and v2 are control thresholds set for the vehicle driving speed, and v1>v2.

[0030] Preferably, a1 and a2 are both control thresholds for vehicle acceleration settings, and a1>a2.

[0031] Preferably, the electronic throttle opening control and brake control are determined based on the vehicle's reversing speed, acceleration, acceleration change rate and throttle opening position information, and can be controlled by only the throttle opening or by both the throttle opening and the brake.

[0032] (III) Beneficial effects

[0033] The embodiment of the present invention provides a method for controlling vehicle reversing safety, which has the following beneficial effects:

[0034] The present invention utilizes the existing vehicle speed, acceleration, throttle position sensors, and electronic throttle on the vehicle to achieve a safety control function, and can effectively solve the safety problems caused by excessive vehicle speed, high vehicle speed and excessive acceleration, and large acceleration and excessively rapid increase in speed when the vehicle is reversing. There is no need to additionally add a reversing radar, a distance measuring sensor, etc. to detect and control obstacles outside the vehicle, which reduces system complexity, reduces costs, and is conducive to promotion. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The preferred implementation scheme will be described below in a clear and understandable manner with reference to the accompanying drawings to further illustrate the above-mentioned characteristics, technical features, advantages and implementation methods of a vehicle reversing safety control method.

[0036] Figure 1 This is a block diagram of a vehicle reversing safety control system of the present invention;

[0037] Figure 2 A flowchart of a vehicle reversing safety control method according to the present invention;

[0038] Figure 3 The present invention discloses a control circuit diagram of a warning light in a vehicle reversing safety control system. DETAILED DESCRIPTION

[0039] The following is combined with Figure 1-3 The present invention is further described with examples:

[0040] Example 1

[0041] A car reversing safety control system comprises a signal acquisition module, a control module and an execution module, wherein the signal acquisition module comprises a gear switch collector, a car speed sensor, a car acceleration sensor and a throttle position sensor, and is used to collect car reversing related signals;

[0042] The control module includes a signal processing submodule and a decision submodule, which are used to receive and process signals and output control signals to the execution module after making decisions;

[0043] The execution module includes an automotive electronic throttle, a braking device, and a warning light, and is used to control the reverse speed of the vehicle and give warnings.

[0044] In this embodiment, the signal acquisition module, the control module, and the execution module are combined to effectively ensure the safety of the vehicle during reverse driving.

[0045] In this embodiment, the gear position switch collector is a position sensor and is used to collect the position signal of the vehicle gear.

[0046] Embodiment 2

[0047] The difference between this embodiment and Embodiment 1 is that, as Figure 2 shown, based on the vehicle reverse safety control system, the present invention further provides a vehicle reverse safety control method, including the following steps:

[0048] Step 1: System initialization;

[0049] Step 2: Collect the position signal of the vehicle gear and determine whether the vehicle is in the reverse state;

[0050] 2.1) If the vehicle is in the reverse state, collect the vehicle driving speed v, acceleration a, and throttle position signal;

[0051] 2.2) If the vehicle is not in the reverse state, continuously collect the position signal of the vehicle gear;

[0052] Step 3: According to the collected signals, determine the relationship between the vehicle driving speed v and the threshold value v1;

[0053] 3.1) If v>v1, perform the opening control of the automotive electronic throttle, braking control, control the warning light to flash, and return to Step 2;

[0054] 3.2) If v<v1, perform the next step;

[0055] Step 4: According to the collected signals, further determine the relationship between the vehicle acceleration a and the threshold value a1, and the relationship between the driving speed v and the threshold values v2 and v1;

[0056] 4.1) If a>a1 and v>v2, perform the opening control of the automotive electronic throttle, braking control, control the warning light to flash, and return to Step 2;

[0057] 4.2) If either a<a1 or v<v2 is satisfied, perform the next step;

[0058] Step 5: According to the collected signals, calculate the acceleration change rate b of the vehicle, and determine the relationship between b and the threshold value b1, and the relationship between the vehicle acceleration a and the threshold value a2;

[0059] 5.1) If b > b1 and a > a2, then perform the opening control of the automotive electronic throttle and the braking control, control the warning light to flash, and return to step 2;

[0060] 5.2) If either b < b1 or a < a2 is satisfied, directly return to step 2.

[0061] In this embodiment, both v1 and v2 are control thresholds set for the vehicle speed during reverse driving of the vehicle, and v1 > v2.

[0062] In this embodiment, both a1 and a2 are control thresholds set for the vehicle acceleration during reverse driving of the vehicle, and a1 > a2.

[0063] The warning light flashing control circuit is as Figure 3 shown. The control signal output by the control module is connected to the triode Q1 through the resistor R1. The upper end of the triode Q1 is connected to the positive power supply VCC through the light-emitting diode LED, and the lower end is grounded. By adjusting the signal output by the control module, the triode Q1 is controlled to conduct and cut off alternately at a certain frequency, so that the light-emitting diode LED flashes to play a warning role.

[0064] In this embodiment, the opening control of the electronic throttle and the braking control are determined according to the vehicle speed, acceleration, acceleration change rate and throttle opening position information during reverse driving of the vehicle. It can be single throttle opening control or simultaneous throttle opening control and braking control.

[0065] For other structures not described, refer to Embodiment 1.

[0066] According to the control method of the reverse driving safety control system of the vehicle based on the above embodiments of the present invention, first determine whether the vehicle speed is too high during reverse driving of the vehicle; if so, deceleration control is required;

[0067] If not, further determine whether its vehicle speed is relatively high and the acceleration is too large. In this case, if so, deceleration control is required;

[0068] If not, determine whether its acceleration is relatively large and the acceleration change rate is too high. In this case, if so, deceleration control is required.

[0069] The reasons for this approach are as follows: First, too high vehicle speed is the most direct risk factor and needs to be judged first;

[0070] Second, when the vehicle speed is relatively high and the acceleration is too large, if the vehicle is not intervened in time, it may reach an excessive speed in a short time;

[0071] Third, the acceleration change rate is too large and the acceleration is large (for example, when you step on the accelerator suddenly over a protrusion on the road, the car's driving resistance suddenly drops sharply, causing the car's acceleration to increase instantly, causing the car to accelerate rapidly in a short period of time). In this case, if you do not intervene in time, the car may accelerate too fast and cause danger.

[0072] The present invention determines and solves three aspects that lead to the danger of reversing, and effectively ensures the safety of the automobile reversing process.

[0073] The embodiments of the present invention disclose preferred embodiments, but are not limited thereto. A person skilled in the art can easily understand the spirit of the present invention based on the above embodiments and make different extensions and changes. However, as long as they do not deviate from the spirit of the present invention, they are all within the protection scope of the present invention.

Claims

1. A method for controlling vehicle reversing safety, characterized in that: The method is applied to an automobile reverse safety control system. The control system includes a signal acquisition module, a control module, and an execution module. The signal acquisition module includes a gear switch collector, an automobile speed sensor, an automobile acceleration sensor, and a throttle position sensor, and is used for acquiring signals related to automobile reverse. The control module includes a signal processing sub-module and a decision-making sub-module, and is used for receiving and processing signals, and outputting control signals to the execution module after decision-making. The execution module includes an automobile electronic throttle, a braking device, and a warning lamp, and is used for realizing the control of the reverse speed of the automobile and warning. The gear switch collector is a position sensor and is used for acquiring the position signal of the automobile gear. The method includes: Step 1, system initialization; Step 2, acquire the position signal of the automobile gear and judge whether it is in the reverse state; 2.1) If the automobile is in the reverse state, acquire the driving speed v, acceleration a, and throttle position signal of the automobile; 2.2) If the automobile is not in the reverse state, continuously acquire the position signal of the automobile gear; Step 3, judge the relationship between the driving speed v of the automobile and the threshold value v1 according to the acquired signals; 3.1) If v>v1, perform the opening control and braking control of the automobile electronic throttle, and return to Step 2; 3.2) If v<v1, execute the next step; Step 4, judge the relationship between the acceleration a of the automobile and the threshold value a1, and the relationship between the driving speed v and the threshold values v2 and v1 according to the acquired signals; 4.1) If a>a1 and v>v2, perform the opening control and braking control of the automobile electronic throttle, and return to Step 2; 4.2) If either a<a1 or v<v2 is satisfied, execute the next step; Step 5, calculate the acceleration change rate b of the automobile according to the acquired signals, and judge the relationship between b and the threshold value b1, and the relationship between the automobile acceleration a and the threshold value a2; 5.1) If b>b1 and a>a2, perform the opening control and braking control of the automobile electronic throttle, and return to Step 2; 5.2) If either b<b1 or a<a2 is satisfied, directly return to Step 2.

2. A vehicle reversing safety control method as claimed in claim 1, characterized in that: Both v1 and v2 are control threshold values set for the driving speed of the automobile, and v1>v2.

3. A vehicle reversing safety control method as claimed in claim 1, characterized in that: Both a1 and a2 are control threshold values set for the automobile acceleration, and a1>a2.

4. A vehicle reversing safety control method as claimed in claim 1, characterized in that: The opening control and braking control of the electronic throttle are determined according to the vehicle speed, acceleration, acceleration change rate, and throttle opening position information of the automobile reverse, and can be single throttle opening control, or can be both throttle opening control and braking control at the same time.

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