TWI404871B - Automatic damping method and device for electric vehicle to adapt to road conditions - Google Patents

Abstract

An automatic shock-absorbing method and device for road condition adaption of electric vehicle assemble a Hall rotational speed sensor on the driving motor of each wheel to sense the rotational speed of the wheel. Furthermore, the axle and the shock absorber of the wheel are separately installed with a piezoelectric transistor acceleration sensor for sensing the vibration and impact of each axle and the shock absorber. The vibration status of the vehicle is determined by the computation of a microcomputer controller, and each wheel is controlled to speed up or slow down to alter the resonance frequency between the vehicle and the shock absorber, thereby achieving the effect of automatic shock absorption.

Description

Automatic damping method and device for electric vehicle adapting to road condition

The invention relates to an automatic damping method and device for adapting an electric vehicle to a road condition, in particular to a method and a device for controlling the acceleration or deceleration of a wheel to change the resonance frequency and to achieve automatic damping.

According to the general vehicle, when driving on a undulating road, it will cause the vehicle to vibrate and cause discomfort. Therefore, the shock absorber is usually installed in the vehicle, and the shock of the shock absorber is used to slow down the vibration.

However, driving on an uneven road will cause the vehicle itself to vibrate, and the vibration of the shock absorber. When the vibration frequency of the vehicle itself is equal to the vibration frequency of the shock absorber, resonance will occur, and the vehicle will obtain additional energy. It causes a large shock. If the strength is greater than the ability of the elastic member of the shock absorber, it will easily cause the shock absorber to bottom out, which will cause more vibration, which will cause great discomfort to the driver and passengers.

In view of the above, how to improve the above-mentioned shortcomings is the focus of the present invention. Therefore, the inventors have made the present invention by virtue of the long-term research and integration of related industries.

One of the objects of the present invention is to solve the above problems and provide an automatic damping method and device for adapting an electric vehicle to a road condition, which is to sense the rotational speed of each wheel by a Hall speed sensor, and to utilize a piezoelectric crystal acceleration sensor. Sensing the vibration and impact of each wheel and shock absorber, and comparing it with the microcomputer controller, and controlling the acceleration or deceleration of each wheel to change the resonance frequency, the effect of automatic damping is achieved.

The second object of the present invention is that the microcomputer controller can control the damping of the shock absorber to improve the comfort.

For the purpose of the foregoing, the present invention includes: at least two or more electric vehicles, wherein the axles of each wheel are driven by a drive motor, each wheel is provided with a shock absorber; a Hall speed sensor, The system is set on the driving motor of the wheel to sense the rotational speed of the wheel; a set of piezoelectric crystal acceleration sensors are arranged on each axle and the shock absorber to sense each axle and the shock absorber. Vibration and impact amount; a microcomputer controller, which is the speed sensed by the Hall speed sensor, and the vibration and impact amount sensed by the piezoelectric crystal acceleration sensor, which are calculated by the microcomputer controller The speed, vibration and impact of the wheel are used to judge the vibration condition of the vehicle, and each drive motor is controlled to drive each wheel to accelerate or decelerate, thereby changing the resonance frequency between the vehicle and the shock absorber.

And the system includes the following steps:

(a) sensing the rotational speed of each wheel: sensing the rotational speed of each wheel by using a Hall speed sensor;

(b) sensing the vibration and impact of each wheel: sensing the vibration and impact of each axle and shock absorber with a piezoelectric crystal acceleration sensor;

(c) Judging: the microcomputer controller compares the rotational speed sensed by the Hall rotational speed sensor and the vibration and impact amount sensed by the piezoelectric crystal acceleration sensor to determine the vibration state of the vehicle;

(d) Control acceleration or deceleration: The microcomputer controller controls each wheel to accelerate or decelerate to change the resonance frequency and achieve automatic damping.

The above and other objects and advantages of the present invention will be readily understood from

Of course, the invention may be varied on certain components, or in the arrangement of the components, but the selected embodiments are described in detail in the specification and their construction is shown in the drawings.

Referring to Figures 1 through 2, the structure of the embodiment selected for use in the present invention is for illustrative purposes only and is not limited by such structure in the patent application.

The following is an embodiment of an automatic damper method and apparatus for adapting road conditions of an electric vehicle according to the present invention. As shown in FIG. 1 , the automatic damper device for adapting the road condition of the electric vehicle includes: at least two or more electric vehicles ( Not shown in the drawings, wherein the axle 11 of each wheel 1 is driven by a drive motor 2, each wheel 1 is provided with a shock absorber 3, and the damping of the shock absorber 3 is adjustable.

A Hall rotation speed sensor 4 is disposed on the drive motor 2 of each wheel 1 to sense the rotation speed of the wheel 1.

A set of piezoelectric crystal acceleration sensors 5 are respectively disposed on each of the axles 11 and the shock absorbers 3, thereby sensing the vibration and impact of each of the axles 11 and the shock absorbers 3.

A microcomputer controller 6 is the rotation speed of the wheel 1 sensed by the Hall rotation speed sensor 4, and the vibration and impact amount sensed by the piezoelectric crystal acceleration sensor 5, and is calculated by the microcomputer controller 6. The speed, vibration and impact of each wheel 1 are compared and compared to determine the vibration condition of the vehicle, and a control command is issued to control each drive motor 2 to drive each wheel 1 to accelerate or decelerate appropriately, thereby changing the vehicle. The resonance frequency with the shock absorber 3 avoids the resonance phenomenon and reduces the strong vibration of the vehicle due to the resonance phenomenon; further, the microcomputer controller 6 can also control the damping of the shock absorber 3.

Please refer to FIG. 2, which is a flow chart of the automatic damping method for adapting the road condition of the electric vehicle of the present invention, which comprises the following steps:

(a) Sensing the rotational speed of each of the wheels 1 : The rotational speed of each of the wheels 1 is sensed by the Hall rotational speed sensor 4.

(b) Sensing the vibration and impact amount of each wheel 1 : Each piezoelectric crystal acceleration sensor 5 is used to sense the vibration and impact amount of each of the axle 11 and the shock absorber 3.

(c) Judging: the microcomputer controller 6 compares the rotational speeds of the respective wheels sensed by the Hall rotational speed sensor 4 and the vibration and impact amounts sensed by the piezoelectric crystal acceleration sensor 5 to each of the wheels 1 The difference is based on the vibration state of the vehicle.

(d) Controlling acceleration or deceleration: After being judged by the microcomputer controller 6, it is controlled to accelerate or decelerate each wheel to change the resonance frequency.

(e) Control Adjusting Damper 3 Damping: The damping of the shock absorber 3 can also be adjusted by the microcomputer controller 6 for various road conditions to improve comfort.

(f) Avoiding the resonance phenomenon: the microcomputer controller 6 controls the acceleration or deceleration of the vehicle, and can adjust the damping of the damper 3 to effectively avoid the resonance phenomenon and improve the comfort.

(g) By the above steps, the effect of automatic shock absorption can be achieved.

When the electric vehicle travels on an uneven road surface, the same vibration frequency is generated between the vehicle itself and the shock absorber 3, and when the resonance phenomenon occurs, the rotation speed of each wheel 1 is sensed by the Hall rotation speed sensor 4, and is output. a signal, and each piezoelectric crystal acceleration sensor 5 disposed on the axle 11 and the shock absorber 3 is used to sense the vibration and impact of each wheel 1 and the shock absorber 3, and output a signal. The microcomputer controller 6 compares the difference between the wheels 1 for each signal to determine the vibration state of the vehicle, and controls each wheel 1 to accelerate or decelerate to change the resonance frequency, and the shock absorber 3 can be adjusted in accordance with the control. Damping allows the electric vehicle to adapt to road conditions, with automatic damping to avoid resonance and improve comfort.

Of course, there are many examples of the invention, with only minor variations in the details. According to a second embodiment of the present invention, when the vehicle is traveling on a undulating road surface or on a slippery road surface, the microcomputer controller 6 can determine the speed, vibration, and impact amount of each wheel 1, that is, The respective wheels 1 are controlled to be appropriately accelerated or decelerated, thereby balancing the speed of each of the wheels 1 to make the running state more stable.

The above description of the embodiments is intended to be illustrative of the invention and is not intended to limit the scope of the invention.

From the above detailed description, it will be apparent to those skilled in the art that the present invention can achieve the foregoing objects and is in accordance with the provisions of the Patent Law.

(customized part)

no

(part of the invention)

1. . . wheel

11. . . axle

2. . . Drive motor

3. . . Shock Absorbers

4. . . Hall speed sensor

5. . . Piezoelectric crystal acceleration sensor

6. . . Microcomputer controller

Figure 1 is a block diagram of an automatic damper device of the present invention.

Figure 2 is a flow chart of the automatic damping method of the present invention.

11. . . axle

2. . . Drive motor

3. . . Shock Absorbers

4. . . Hall speed sensor

5. . . Piezoelectric crystal acceleration sensor

6. . . Microcomputer controller

Claims (3)

The utility model relates to an automatic damping device for adapting road conditions of electric vehicles, which comprises: one electric vehicle of at least two wheels, wherein the axles of each wheel are driven by a driving motor, and each wheel is provided with a shock absorber; The sensor is set on the driving motor of the wheel to sense the rotational speed of the wheel; a set of piezoelectric crystal acceleration sensors are arranged on each axle and the shock absorber to sense each axle and The vibration and impact of the shock absorber; a microcomputer controller, which is the speed sensed by the Hall speed sensor and the vibration and impact sensed by the piezoelectric crystal acceleration sensor, controlled by the microcomputer The controller calculates the speed, vibration and impact of each wheel to determine the vibration condition of the vehicle, and controls each drive motor to drive each wheel to accelerate or decelerate, thereby changing the resonance frequency between the vehicle and the shock absorber. The automatic damper device for adapting the road condition of the electric vehicle according to the first aspect of the patent application, wherein the damping of the shock absorber is controlled by the microcomputer controller. The invention relates to an electric shock absorber with an automatic damper device adapted to the road condition as described in claim 1 of the patent application, which is applied to an electric vehicle of at least two wheels or more, which comprises the following steps: (a) sensing each Wheel speed: Using the Hall speed sensor to sense the speed of each wheel; (b) Sensing the vibration and impact of each wheel: with a piezoelectric crystal The acceleration sensor senses the vibration and impact of each axle and the shock absorber; (c) judges: the speed sensed by the Hall speed sensor by the microcomputer controller, and sensed by the piezoelectric crystal acceleration sensor The vibration and impact amount are compared to determine the vibration state of the vehicle; (d) Control the acceleration or deceleration: the microcomputer controller controls the acceleration or deceleration of each wheel to change the resonance frequency and achieve automatic damping.