Anti-rollover system of dumper

Abstract

The invention discloses an anti-tip-back system of a dumper. The anti-tip-back system of the dumper comprises a PLC (Programmable Logic Controller), the pressure sensor is mounted on a front axle of the dumper; the direction control valve is mounted in the middle of an oil path pipeline of the hydraulic pump and the hydraulic actuating mechanism, and is also connected with the PLC through a switch; the hydraulic pump is connected with the hydraulic oil tank through a hydraulic oil pipe; the indicating lamp is installed on a cab instrument desk and connected with the PLC. The pressure sensor collects pressure data of a front axle, the PLC processes the data collected by the pressure sensor, when the data is gradually reduced and reaches a preset threshold value, it is judged that a vehicle head is about to be lifted away from the ground at the moment, the whole vehicle tilts backwards, and before the vehicle head is lifted away from the critical point of the ground, the PLC sends out a signal to cut off the switch and controls the lifting mechanism to make the cargo compartment fall back. The center-of-gravity position is adjusted to prevent the whole vehicle from turning backwards

Description

Technical Field

[0001] The invention relates to the field of automobile technology, and in particular to an automatic prevention system including a control method for preventing rear-end dump vehicles including commercial vehicles and agricultural vehicles from tipping over and causing accidents during unloading. Background Art

[0002] When unloading cargo, traditional rear-tilt dump vehicles are unable to monitor the cargo tipping situation. When the cargo is stuck in the cargo compartment and the cargo compartment tilts backwards, the center of gravity of the cargo moves backwards. The frame and body of the vehicle will flip backwards with the rear wheels as the fulcrum under the action of the gravity of the cargo. The front of the vehicle may be lifted, and the vehicle may tip over, posing a major safety hazard. Summary of the invention

[0003] The purpose of the present invention is to provide a dump truck anti-rollover system. The system can collect front axle load data and feed it back to a PLC controller through a pressure sensor installed on the front axle of the vehicle according to the change of the front axle load of the dump truck when unloading. The PLC controller processes the collected data. When the data gradually decreases to a preset threshold, it is determined that the front of the vehicle is about to be lifted off the ground and the whole vehicle will tilt backward. Before the critical point of the front of the vehicle being lifted off the ground, the PLC controller sends a signal to cut off the switch, the solenoid valve switches the oil circuit, and the lifting mechanism is controlled to make the cargo compartment fall back, and the center of gravity position is adjusted to prevent the whole vehicle from rolling over.

[0004] The PLC controller adopts Arduino Nano controller.

[0005] The pressure sensor adopts HBM C16 column sensor, which is installed at the connection between the front axle and the steering knuckle and has good corrosion resistance.

[0006] The switch adopts a 5V DC relay.

[0007] The solenoid valve is a 24V single-control solenoid valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a schematic diagram of the control flow of the dump truck anti-rollover system of the present invention.

[0009] Figure 2 It is a schematic structural diagram of the anti-rollover system of the present invention.

[0010] Figure 3 This is a schematic diagram of the pressure sensor installation location.

[0011] Figure 4 It is a circuit connection diagram of PLC (Arduino Nano control board) with pressure sensor, power supply, switch, solenoid valve and indicator light.

[0012] Figure 5 It is the logic flow chart of the control unit. DETAILED DESCRIPTION

[0013] The embodiments of the present invention are further described in detail below with reference to the accompanying drawings.

[0014] See also Figure 1 , 2 , 3, 4, the dump truck anti-rollover system of the present invention includes a pressure sensor 1 installed at the connection between the front axle 11 and the steering knuckle 9; the directional control valve 4 is installed in the oil circuit system of the hydraulic pump 7 and the hydraulic actuator 6; the indicator light 5 is installed on the dashboard of the cab; during unloading, that is, the cargo compartment rolls over, the pressure sensor collects the front axle load and transmits these pressure data through the signal line to the PLC control unit 2. As the cargo compartment rolls over, the spring pressure on the front axle will gradually decrease. The PLC control unit 2 compares the pressure data collected by the sensor with the preset pressure threshold. When the pressure data is equal to the threshold, the indicator light 5 flashes to alarm, and at the same time, the PLC control unit 2 sends a signal to the switch 3, the directional control valve 4 switches the oil circuit, and the hydraulic oil flows back to the hydraulic oil tank 8, and the cargo compartment descends under the action of its own weight and external force.

[0015] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings; however, the present invention is not limited to the specific details in the above embodiments; within the technical concept of the present invention, a variety of simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the protection scope of the present invention.

[0016] In addition, various embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the present invention, they should also be regarded as the contents disclosed by the present invention.

Claims

1. A dump truck anti-rollover system, comprising a pressure sensor (1), the pressure sensor (1) being connected to the A0 terminal of an Arduino Nano controller (2); the pressure sensor (1) being installed at the connection between the front axle and the steering knuckle of the vehicle; a directional control valve (4) being connected to the D6 terminal of the Arduino Nano controller (2) through a relay switch (3); a hydraulic actuator (6) being connected to the directional control valve (4) through a hydraulic pipeline; and an indicator light (5) being located in a cab and being connected to the Arduino Nano controller (2).

2. The dump truck anti-rollover system according to claim 1, characterized in that: The directional control valve (4) is a two-position solenoid valve located in the main pipeline between the hydraulic pump (7) and the hydraulic actuator (6) and is used to control the flow direction of the oil.

3. The dump truck anti-rollover system according to claim 1, characterized in that: The pressure sensor (1) is an HBM C16 column sensor, installed at the junction of the front axle and the steering knuckle, and connected to the Arduino Nano controller (2) through a wiring harness.

4. The dump truck anti-rollover system according to claim 1, characterized in that: The hydraulic oil tank (8) is connected to the hydraulic pump (7) and the hydraulic actuator (6) through a main oil pipe.

5. The control method of the dump truck anti-rollover system according to claim 1, characterized in that: The following steps are involved: The output end of the pressure sensor (1) is connected to the A0 port of the Arduino Nano controller (2), and the input end of the relay switch (3) is connected to the D6 port of the Arduino Nano controller (2). The Arduino Nano controller (2) stores the value y read by the pressure sensor (1), which represents the front axle load in the vertical direction borne by the sensor. This value decreases as the tilt angle of the cargo compartment increases, and is compared with a pre-set pressure threshold b. When y is less than b, it means that the front wheels of the vehicle are about to leave the ground and the vehicle will roll over. The D6 port of the Arduino Nano controller (2) outputs a signal to close the relay switch (3), and the directional control valve (4) switches the oil circuit. The hydraulic oil flows back to the hydraulic oil tank (8), and the cargo compartment descends under the action of its own weight and external force.

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