[0020] The present invention will be further described in detail below with reference to the drawings and specific embodiments.
[0021] A method for judging the brake mistakenly stepping on the accelerator and automatically braking, the hardware part of the method is as figure 2 As shown, it is realized by a single-chip microcomputer with a preset program, and a set of misoperation detection system connected to it, and a set of oil circuit control system and a set of brake control system; wherein the misoperation detection system includes the setting on the throttle The acceleration sensor on the bottom of the pedal, the distance measuring sensor arranged on the front end of the car, and the inclination sensor arranged on the body of the car; the oil circuit control system includes an oil cut-off solenoid valve, such as image 3 As shown, the piston 1 of the oil cut-off solenoid valve is matched and arranged at the oil inlet 3 of the automobile fuel injector 2, and the circuit of the solenoid 4 of the oil cut-off solenoid valve is connected to and controlled by the single-chip microcomputer; Dynamic control system such as Figure 4 As shown, it includes an armature 12 arranged on the brake pedal connecting rod 11, and an electromagnet 13 arranged behind the brake pedal connecting rod 11 and adjacent to the armature 12. The electric circuit 14 of the electromagnet 13 is connected to and received by the single-chip microcomputer. Control; the method includes the following steps (refer to figure 1 Understand the following steps):
[0022] a. The acceleration of the accelerator pedal is detected by the acceleration sensor, converted into a digital signal and transmitted to the single-chip microcomputer, the distance of the obstacle in front of the car is detected by the ranging sensor, and the digital signal is converted into a digital signal and transmitted to the single-chip microcomputer. The inclination sensor tests the inclination angle of the car, converts it into a digital signal and transmits it to the single-chip microcomputer;
[0023] b. The single-chip microcomputer compares the digital signal transmitted by the acceleration sensor with the preset acceleration value. When the digital signal transmitted by the acceleration sensor is greater than the preset acceleration value, it is judged that the accelerator is stepped on, and step c is executed at this time , When the digital signal value transmitted by the acceleration sensor is less than the preset acceleration value, repeat this step;
[0024] c. The single-chip microcomputer compares the digital signal transmitted by the ranging sensor with the preset distance value. When the digital signal transmitted by the ranging sensor is less than the preset distance value, it is determined that there is an obstacle ahead, and then step e is executed. , When the digital signal transmitted by the ranging sensor is greater than the preset distance value, it is determined that there is no obstacle ahead, and step d is executed at this time;
[0025] d. The single-chip microcomputer compares the digital signal transmitted by the inclination sensor with the preset angle value. When the digital signal transmitted by the inclination sensor is greater than the preset angle value, it is determined that the car is downhill, and then step e is executed. When the digital signal transmitted by the sensor is less than the preset angle value, return to step b;
[0026] e. The single-chip microcomputer issues instructions to control the oil circuit control system to cut off the oil, and at the same time control the brake control system to brake.
[0027] In specific implementation, the acceleration sensor can be directly purchased from existing products, only the volume and weight of the acceleration sensor do not affect the pedal movement. Generally, the analog signal output by the acceleration sensor is a voltage signal, and an analog-to-digital conversion is required. The circuit module converts it into a digital signal and then inputs it into the single-chip microcomputer for processing. Of course, if the purchased acceleration sensor has its own analog-to-digital conversion function and can directly output digital signals, you can directly connect the output terminal of the acceleration sensor to the input terminal of the single-chip microcomputer. The distance measuring sensor and the inclination sensor can also be directly purchased from existing mature products, and the output terminal is connected to the analog-to-digital conversion circuit module for analog-to-digital conversion and then connected to the single-chip microcomputer for processing. The preset program in the single-chip microcomputer can compare the received detection result with the preset limit value for judgment. The process of comparison and judgment is completed by a program pre-programmed in the microcontroller. Refer to the judgment steps of specific programming ideas figure 1 , figure 1 The program steps are published in the SCM. Anyone skilled in the field of single-chip microcomputers can use the figure 1 On the basis of the shown flow, a single-chip microcomputer program that meets the above method flow is compiled. The creative contribution of the present invention to the prior art lies in the method itself, and the programming part is well-known to those skilled in the art. Conventional technology.
[0028] figure 1 It is a schematic diagram of the working flow of the above method steps. In the specific implementation, the preset program in the microcontroller can be compiled according to this flowchart, that is, the microcontroller first initializes, and then receives the digital signal from the acceleration sensor and the preset acceleration value. Compare, determine whether to step on the accelerator, if the judgment is no, continue the cycle comparison judgment; if the judgment is yes, continue to compare the received digital signal from the ranging sensor with the preset distance value to determine whether the vehicle is in front of you If an obstacle is detected, if it is judged as yes, it directly instructs the cut-off solenoid valve to act to close the throttle, and at the same time instructs the brake control system to brake; if it is judged as no, then it will send the received inclination sensor to the The digital signal is compared with the preset angle value to determine whether the car is going downhill. If it is determined to be yes, it will directly instruct the cut-off solenoid valve to act to close the throttle, and at the same time instruct the brake control system to brake; if it is determined to be otherwise, return At the beginning of the process, the comparison and determination of the digital signal transmitted by the acceleration sensor and the acceleration value of the preset value are continued.
[0029] In the above process, when it is judged that the accelerator is stepped on by mistake, the single-chip microcomputer can immediately control the movement of the oil cut-off solenoid valve piston 1 through the preset program to block the oil inlet 3 of the automobile injector 2 and control the brake control system at the same time. The electromagnet 13 is energized to suck down the armature 12 arranged on the brake pedal connecting rod 11, causing the brake pedal to be depressed for braking. The specific oil cut-off and braking process will be described in detail below according to the drawings.
[0030] image 3 It is a partial structural diagram of the oil circuit control system of the present invention. As shown, the piston 1 of the oil cut-off solenoid valve is matched and arranged at the oil inlet 3 of the automobile fuel injector 2. When the solenoid coil of the oil cut-off solenoid valve 4 When the circuit is disconnected, the piston 1 can stretch out under the action of the spring 5 and block the oil inlet 3, causing the disconnection of the oil circuit. When the circuit of the solenoid 4 is connected, the solenoid 4 can generate magnetic force. Suction the iron piston to restore the smooth flow of the oil path. In specific implementation, how to automatically control the on and off of the circuit where the electromagnetic coil 4 is located by the single-chip microcomputer is a well-known conventional technology to those skilled in the art. For example, a single-chip microcomputer is used to connect and control a relay, and then the normally closed contact of the relay is connected. Into the circuit loop where the solenoid 4 is located, so that in the normal state, the circuit loop where the solenoid 4 is located is connected, and the piston 1 is in the suction state. When the single-chip microcomputer detects that the accelerator is stepped on by mistake, the relay signal is given to control its normally closed touch When the point is disconnected, the solenoid 4 loses power, and the piston 1 stretches out under the action of the spring to block the oil circuit and cut off the oil supply. figure 2 In the middle, 6 is the oil inlet. When the car is supplied with oil normally, the oil will pass from the oil inlet 6 through the oil inlet 3 and finally enter the fuel injector 2.
[0031] Figure 4 This is a partial structural diagram of the brake control system of the present invention. As shown, the brake control system includes an armature 12 arranged on the brake pedal connecting rod 11, and an electromagnetic armature arranged behind the brake pedal connecting rod 11 and adjacent to the armature 12 Iron 13, the circuit loop 14 of the electromagnet 13 is connected to and controlled by the single chip microcomputer. In specific implementation, a relay can also be connected and controlled by a single-chip microcomputer, and then the normally open contact of this relay can be connected to the circuit circuit 14 of the electromagnet 13, so that in the normal state, the circuit circuit 14 is in the disconnected state, and the electromagnet 13 does not work when the power is off. When the single-chip microcomputer detects that the accelerator is stepped on by mistake, the relay signal is given to control its normally open contact to close, the circuit 14 is connected, and the electromagnet 13 works to attract the armature 12, and then drives the brake pedal connecting rod 11 to go The rear movement brakes.
