CN203093804U - Automobile safety seat based on magneto-rheological damper - Google Patents

Abstract

The utility model discloses a car safety seat based on a magneto-rheological damper, which comprises a seat and a support column, the support column is installed under the seat, and a pressure sensor, a magneto-rheological The damper, the spring, and the pressure sensor are connected with the input end of the single-chip microcomputer through the signal processor, the output end of the single-chip microcomputer is connected with the controllable power supply, and the controllable power supply is connected with the magneto-rheological damper. The utility model has a high degree of intelligence, and can automatically and rationally adjust the damping of the damper according to the weight of the occupant and the intensity of the vibration when the car is running, so as to change the output force of the damper and greatly improve the seating comfort of the seat. comfort.

Description

A car safety seat based on a magnetorheological damper

technical field

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

Background technique

With the rapid development of the national economy, the comprehensive construction of the expressway network and the great improvement of living standards, cars have gradually integrated into people's work and life and become an indispensable means of transportation. People have higher requirements for the ride comfort and safety of cars requirements. Traditional car seats use ordinary dampers. Because of their constant damping force, the damping cannot be reasonably changed according to the weight of the occupants and the vibration level when the car is running, so that people with weaker vibrations and smaller weights can rush to the seat. "Hard", but for those with a high degree of vibration in the car and a heavy weight of the occupants, the seat feels too "soft", which greatly reduces the comfort of the seat. The discomfort caused by the vibration of automobiles is common, especially in trucks and passenger cars, and its disadvantages are particularly prominent.

Contents of the invention

Aiming at the deficiencies in the prior art, the purpose of the utility model is to provide a car safety seat based on a magneto-rheological damper that can improve seat comfort.

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

A car safety seat based on a magneto-rheological damper, comprising a seat and a support column, the support column is installed under the seat, and a pressure sensor, a magneto-rheological damper and a spring are arranged side by side between the support column and the bottom surface of the car, The pressure sensor is connected with the input terminal of the single-chip microcomputer through the signal processor, the output terminal of the single-chip computer is connected with the controllable power supply, and the controllable power supply is connected with the magneto-rheological damper.

The utility model also has the following technical characteristics:

The pressure sensor adopts SM5651-003D-3S type pressure sensor.

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

The utility model has a high degree of intelligence, and can automatically and rationally adjust the damping of the damper according to the weight of the occupant and the intensity of the vibration when the car is running, so as to change the output force of the damper and greatly improve the seating comfort of the seat. comfort.

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 overall structure of the magneto-rheological damper.

The meanings of each label in the figure are: 1-seat, 2-support column, 3-bottom of the car, 4-pressure sensor, 5-magneto-rheological damper, 6-spring, 7-signal processor, 8-single-chip microcomputer, 9-controllable power supply, 51-working cylinder, 52-damping channel, 53-magneto-rheological fluid, 54-excitation coil, 55-magnetic flux, 56-piston, 57-piston rod.

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 solution, as shown in Figure 1 and Figure 2, a car safety seat based on a magnetorheological damper includes a seat 1 and a support column 2, the support column 2 is installed under the seat 1, and the support column 2 A pressure sensor 4, a magneto-rheological damper 5 and a spring 6 are installed side by side between the bottom surface 3 of the car, the pressure sensor 4 is connected to the input end of the single-chip microcomputer 8 through the signal processor 7, and the output end of the single-chip microcomputer 8 is connected to the controllable power supply 9 , the controllable power supply 9 is connected to the magnetorheological damper 5 .

The pressure sensor 4 adopts the SM5651-003D-3S pressure sensor. This series of sensors is a dual-in-line micro-differential pressure sensor with temperature compensation and calibration. The sensor has superior performance and can be excited by constant current or constant pressure. Strong, suitable for seats with severe vibration.

Single-chip microcomputer 8 adopts STC189C51 single-chip microcomputer; signal processor 7 adopts ZMD31050 sensor signal processing chip.

The controllable power supply 9 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.

The magnetorheological damper 5 is a new type of damper based on the controllable characteristics of the magnetorheological fluid. Its working principle is that under the action of an external magnetic field, the magneto-polarized particles randomly distributed in the magnetorheological fluid 53 move along the direction of the magnetic field , the magnetization movement makes the particles connect end to end to form a chain or network structure, so that the flow characteristics of the magnetorheological fluid 53 change, and then the pressure difference between the two ends of the damping channel 52 of the magnetorheological damper 5 changes, reaching The purpose of changing the damping force. As shown in Figure 3, the internal magnetic field of the magnetorheological damper 5 is excited by the excitation coil 54 wound in the middle of the piston 56, and the winding part of the excitation coil is the magnetic core, where the magnetic flux 55 is the densest, and the magnetic flux 55 flows out of the magnetic core Flow through the end of the piston 56 to the damping passage 52 (that is, the annular gap between the piston 56 and the working cylinder 51), pass through the damping passage 52 and enter the working cylinder 51, and then pass through the damping passage 52 on the other side and finally return to the The magnetic core forms a loop. As shown in Figure 1, the piston rod 57 of the magnetorheological damper 5 is connected with the seat 1, and the working cylinder 51 is connected with the bottom surface 3 of the automobile. Relative to the movement of the working cylinder 51 , the magneto-rheological fluid 53 flows through the damping channel 52 to realize energy absorption. When the magnetic field loaded by the excitation coil 54 changes, the viscosity of the magnetorheological fluid 53 changes, so that the damping force changes.

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

During the driving process of the automobile, due to the vibration caused by the road surface excitation, the piston 56 and the working cylinder 51 vibrate relative to each other, and the pressure is also different due to the different vibration intensity. The pressure sensor 4 on each safety seat transmits the pressure change of the seat 1 to the signal processor 7 in real time, and the signal processor 7 converts the analog signal into a digital signal and then transmits it to the single-chip microcomputer 8. When the weight of the occupant When the vehicle is too large or too light or the vibration is severe when the car is running, the pressure signal detected by the pressure sensor 4 changes strongly, and the signal processor 7 receives the strong signal and converts it into a digital signal and transmits it to the single-chip microcomputer 8, and the single-chip microcomputer 8 pairs the pressure signal. After the change is judged, a control signal is sent to control the increase of the current output by the controllable power supply 9, so as to control the increase of the current loaded on the excitation coil 54 in the magnetorheological damper 5, so that the magnetorheological damper 5 The output force of the controllable power supply increases; when the vibration of the seat 1 tends to be stable, the change of the pressure signal detected by the pressure sensor 4 weakens, and the single-chip microcomputer 8 controls the controllable power supply 9, so that the current of the controllable power supply 9 decreases, and finally reduces the magnetic force. The output force of the rheological damper is controlled repeatedly in this way, so that the vibration of the seat 1 can achieve the most reasonable damping effect, and the ride comfort of the car can be improved.

Claims (3)

1. safety chair seats of car based on MR damper, comprise seat (1) and pillar stiffener (2), pillar stiffener (2) is installed in seat (1) below, it is characterized in that, pressure sensor (4), MR damper (5) and spring (6) are installed between pillar stiffener (2) and automobile bottom surface (3) side by side, pressure sensor (4) links to each other with the input end of micro controller system (8) by signal processor (7), the mouth of micro controller system (8) links to each other with controllable electric power (9), and controllable electric power (9) links to each other with MR damper (5).

2. the safety chair seats of car based on MR damper as claimed in claim 1 is characterized in that, described pressure sensor (4) adopts SM5651-003D-3S type pressure sensor.

3. the safety chair seats of car based on MR damper as claimed in claim 1 is characterized in that, described micro controller system (8) adopts the STC189C51 micro controller system.

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