CN203093960U - Automobile bumper based on magneto-rheological body - Google Patents

Abstract

The utility model discloses an automobile bumper based on a magneto-rheological variant, which comprises a bumper on which a pressure sensor is installed, the pressure sensor is connected with the input end of a single-chip microcomputer through a signal processor, and the output end of the single-chip microcomputer is connected with a The controllable power supply is connected with the excitation coil wound on the magneto-rheological body, and the magneto-rheological body is installed between the bumper and the front of the vehicle. The pressure sensor adopts PMR300 digital pressure sensor; the single-chip microcomputer adopts STC189C51 single-chip microcomputer. The utility model has a high degree of intelligence. According to the change of the pressure when the car collides, the sensor can transmit the signal to the signal processor, and then to the single-chip microcomputer, so as to control the current intensity, and then change the intensity of the magnetic field, so that the stiffness of the bumper Get changed, eventually to the extent that the damage from a car crash is mitigated.

Description

A car bumper based on magneto-rheological

technical field

The utility model belongs to the field of auto parts, in particular to an auto bumper.

Background technique

With the continuous development of the modern automobile industry, automobiles have become an indispensable means of transportation for human life. However, with the rapid development of modern expressways and the continuous improvement of automobile driving speeds, vehicles have higher and higher requirements for automobile driving safety. . Traffic accidents have become "the world's number one hazard", and China is one of the countries with the largest number of traffic accident deaths in the world. Since the end of the 1980s, the annual death toll in China's traffic accidents has exceeded 50,000 for the first time, and China (excluding Hong Kong, Macao and Taiwan) has 500,000 traffic accidents every year, and the death toll due to traffic accidents has exceeded 100,000. Yu Nian ranks first in the world.

When the car is driving on the highway, the collision force on the car is also different due to the different speed of the vehicle. Now the bumper of the car has a certain stiffness, and the stiffness cannot be properly changed for different collision pressures, and the impact buffering effect on the highway is not good. ideal.

Contents of the invention

Aiming at the deficiencies in the prior art, the purpose of this utility model is to provide a car bumper based on magneto-rheological change, the device can adjust the bumper stiffness according to the pressure of the car collision.

In order to realize above-mentioned task, the utility model adopts following technical scheme to realize:

A car bumper based on magnetorheological variants, including a bumper, a pressure sensor is installed on the bumper, the pressure sensor is connected to the input end of a single-chip microcomputer through a signal processor, and the output end of the single-chip microcomputer is connected to a controllable power supply, which can be controlled The power supply is connected to the field coil wound on the magnetorheological body, which is installed between the bumper and the front of the car.

The utility model also has the following technical characteristics:

The pressure sensor adopts PMR300 digital pressure sensor.

Described single-chip microcomputer adopts STC189C51 single-chip microcomputer.

The utility model has a high degree of intelligence. According to the change of the pressure when the car collides, the sensor can transmit the signal to the signal processor, and then to the single-chip microcomputer, so as to control the current intensity, and then change the intensity of the magnetic field, so that the stiffness of the bumper Get changed, eventually to the extent that the damage from a car crash is mitigated.

Description of drawings

Fig. 1 is a schematic diagram of the installation position of the utility model.

Fig. 2 is a schematic diagram of the connection relationship of the control part of the present invention.

Fig. 3 is a schematic diagram of the working principle of the magneto-rheological body.

The meanings of each label in the figure are: 1-bumper, 2-magneto-rheological body, 3-sensor, 4-signal processor, 5-single-chip microcomputer, 6-controllable power supply, 7-excitation coil.

Below in conjunction with accompanying drawing and embodiment the concrete content of the present utility model is described in further detail.

Detailed ways

The specific embodiments of the present utility model are provided below, and it should be noted that the present utility model is not limited to the following specific embodiments, and all equivalent transformations done on the basis of the technical solution of the application all fall into the protection scope of the present utility model.

According to the above technical scheme, as shown in Figure 1 and Figure 2, a car bumper based on a magnetorheological damper, including a bumper 1, a pressure sensor 3 is installed on the bumper 1, and the pressure sensor 3 is passed through a signal processor 4 is connected to the input end of the single-chip microcomputer 5, the output end of the single-chip microcomputer 5 is connected to a controllable power supply 6, and the controllable power supply 6 is connected to the excitation coil 7 wound on the magneto-rheological body 2, and the magneto-rheological body 2 is installed on the bumper 1 and the front of the car.

Pressure sensor 3 adopts PMR300 digital pressure sensor. This pressure sensor has high sensitivity and strong anti-interference, and is suitable for use under complex environmental conditions.

Single-chip microcomputer 5 adopts STC189C51 single-chip microcomputer; signal processor 4 adopts ZMD31050 sensor signal processing chip.

The controllable power supply 6 adopts a maintenance-free storage battery. The maintenance-free battery is made of lead-calcium alloy. Because the battery uses lead-calcium alloy as the grid, the amount of water decomposition generated during charging is small, and the amount of water evaporation is also low. In addition, the shell is sealed, and the sulfuric acid gas released There are also few, so compared with traditional batteries, it has the advantages of not needing to add any liquid, docking the pile head, and having a long power storage time.

A magneto-rheological body 2 is filled between the bumper 1 and the front of the vehicle, and the outside is wrapped by a metal shell, and an excitation coil 7 is arranged between the shell and the magneto-rheological body 2 . As shown in Figure 3, when a large current is passed to the exciting coil 7, a stronger magnetic field is generated by the current passing through the exciting coil 7, and the stiffness of the magnetorheological body 2 increases under the action of a large field strength; when the exciting coil 7 The internal current is small, even when there is no current, the magnetic field weakens, and the stiffness of the magneto-rheological body 2 decreases, so that the stiffness of the magneto-rheological body 2 is controlled by the current.

Magnetorheological 2 is a smart material whose modulus can be controlled by an external magnetic field, and this control is fast and stable. Therefore, magnetorheological 2 can be used as a controllable stiffness element on a car bumper.

The working process of the present utility model is as follows:

During the car collision process, each pressure sensor 3 measures the pressure on the bumper in real time, and transmits each pressure signal to the single-chip microcomputer 5 after being converted from an analog signal to a digital signal by the signal processor 4 . When the pressure on the automobile is different, the single-chip microcomputer 5 makes a judgment, the single-chip microcomputer 5 controls the controllable power supply 6 to output different currents, and the controllable magnetic field is generated by the current. When the magnetic field changes, the shear modulus of the magnetorheological body 2 changes. In this way, the stiffness of the magneto-rheological body 2 is changed, that is, the stiffness of the entire car bumper based on the magneto-rheological body is changed, so as to achieve the purpose of buffering and ultimately reduce the damage of the car when it collides.

Claims (3)

1. Federal bumper based on magnetic rheological body, comprise bumper/spoiler (1), it is characterized in that, pressure sensor (3) is installed on bumper/spoiler (1), pressure sensor (3) links to each other with the input end of micro controller system (5) by signal processor (4), the mouth of micro controller system (5) is connected with controllable electric power (6), and controllable electric power (6) links to each other with excitation coil (7) on being wrapped in magnetic rheological body (2), and magnetic rheological body (2) is installed between bumper/spoiler (1) and the headstock.

2. the Federal bumper based on magnetic rheological body as claimed in claim 1 is characterized in that, described pressure sensor (3) adopts the PMR300 digital pressure sensor.

3. the Federal bumper based on magnetic rheological body as claimed in claim 1 is characterized in that, described micro controller system (5) adopts the STC189C51 micro controller system.

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