An acceleration sensor for hill starting and steep slope descent

Abstract

The present invention discloses an acceleration sensor for starting on a slope and slow descent on a steep slope, comprising an inertia block, a spring sheet, a left slider, a right slider, a motor, a worm and a potentiometer; the inertia block is connected to the potentiometer, and the potentiometer outputs a signal to a vehicle controller; the left slider and the right slider are respectively arranged at the left and right parts of the worm, and when the worm rotates, the left slider and the right slider can be driven to move toward or away from each other along the worm; the inertia block is located between the left slider and the right slider, and is connected to the spring sheet; the motor is connected to the worm and can drive the worm to rotate axially. Compared with other slope sensors, the acceleration sensor of the present invention can measure acceleration only when the vehicle stops, does not require a large range, and can also lock the mechanical part of the sensor, does not require high real-time performance of the sensor, and has low wear, so a low-cost potentiometer can be used as a sensor, which has the advantages of low cost, high precision and good reliability.

Description

Technical Field

[0001] The invention relates to the technical field of automobile acceleration sensors, and in particular to an acceleration sensor used for ramp starting and steep slope descent. Background Art

[0002] With the advancement of technology and the increasing demand for car driving convenience, many cars are equipped with hill start assist and steep slope descent control systems. When implementing hill start assist and steep slope descent control, it is necessary to measure the angle of the slope at this time and transmit this angle signal to the vehicle controller. The vehicle controller implements hill start assist and steep slope descent control based on this signal. Due to the harsh working environment on the car, the sensor needs to withstand vibration and output high precision, so the cost is relatively high.

[0003] The potentiometer is a low-cost, high-precision sensor. However, it has a slow response speed and is easy to wear, so the slope sensor of the car generally does not use a potentiometer. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention aims to provide an acceleration sensor for hill starting and steep slope descent, which only measures the acceleration when the vehicle stops, prepares to start on a hill or descends on a steep slope, thereby measuring the slope signal to the vehicle controller, and then locks the sensor and stops powering it, so that the potentiometer will not be worn out due to vibration and acceleration and deceleration during vehicle driving.

[0005] In order to achieve the above object, the present invention adopts the following technical solution:

[0006] An acceleration sensor for starting on a slope and slow descent on a steep slope comprises an inertia block, a spring sheet, a left slider, a right slider, a motor, a worm and a potentiometer; the inertia block is connected to the potentiometer, and the potentiometer outputs a signal to a vehicle controller; the left slider and the right slider are respectively arranged at the left and right parts of the worm, and when the worm rotates, the left slider and the right slider can be driven to move toward or away from each other along the worm; the inertia block is located between the left slider and the right slider, and is connected to the spring sheet; the motor is connected to the worm and can drive the worm to rotate axially.

[0007] Furthermore, the left and right parts of the worm are respectively provided with external threads in different directions, and the left and right sliders are respectively provided with internal threads matching the threads of the left and right parts, and are respectively connected to the left and right threads of the worm through their own internal threads.

[0008] The present invention also provides a working method of the acceleration sensor, the specific process of which is as follows:

[0009] When the vehicle is ready to start on a slope or to slowly descend a steep slope, the vehicle stops, and the vehicle controller controls the motor to drive the worm to rotate, so that the left and right sliders move in opposite directions; because the vehicle is parked on the slope, under the action of gravity, the inertia block overcomes the elastic force of the spring sheet to produce displacement, so that the potentiometer outputs a signal; the greater the slope, the greater the displacement of the inertia block; the potentiometer outputs a signal to the vehicle controller, and the vehicle controller adjusts the brake according to the signal to achieve the function of starting on a slope or slowly descending a steep slope;

[0010] When the vehicle controller receives the signal from the potentiometer and the signal no longer changes, the vehicle controller stores the signal for this slope start or steep slope descent, no longer receives new signals, then stops supplying power to the potentiometer, and controls the motor to drive the worm to rotate in the opposite direction, so that the left slider and the right slider move toward each other until the inertia block is clamped and fixed; since the inertia block is clamped, the potentiometer will not move no matter how the vehicle moves, thereby reducing the wear of the potentiometer; at the same time, since the potentiometer is not powered, it will not heat up.

[0011] Therefore, a potentiometer-based acceleration sensor can be developed for hill starting and steep slope descent. The acceleration is only measured when the vehicle stops and is preparing to start on a hill or descend on a steep slope, so as to measure the slope signal and send it to the vehicle controller. The sensor is then locked and the power supply is stopped. In this way, the potentiometer will not be worn out due to vibration, acceleration and deceleration during vehicle driving.

[0012] The beneficial effects of the present invention are: compared with other slope sensors, the acceleration sensor of the present invention can measure acceleration only when the vehicle is stopped, does not require a large range, and can also lock the mechanical part of the sensor. The real-time requirements of the sensor are not high and the wear is small. Therefore, a low-cost potentiometer can be used as a sensor, which has the advantages of low cost, high precision and good reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a schematic diagram of the structure of the acceleration sensor in Example 1 of the present invention;

[0014] Figure 2 This is a schematic diagram of the operation of the acceleration sensor when the vehicle starts on a hill or descends a steep slope in Embodiment 2 of the present invention;

[0015] Figure 3 It is a schematic diagram of the operation of the acceleration sensor after the vehicle controller stops receiving the potentiometer signal when the vehicle starts on a hill or descents on a steep slope in Example 2 of the present invention. DETAILED DESCRIPTION

[0016] The present invention will be further described below in conjunction with the accompanying drawings. It should be noted that this embodiment is based on the technical solution and provides a detailed implementation method and specific operation process, but the protection scope of the present invention is not limited to this embodiment.

[0017] Example 1

[0018] This embodiment provides an acceleration sensor for hill starting and steep slope descent. Figure 1 As shown, it includes an inertia block 1, a spring sheet 2, a left slider 3, a right slider 4, a motor 5, a worm 6 and a potentiometer 7; the inertia block 1 is connected to the potentiometer 7, and the potentiometer 7 outputs a signal to the vehicle controller; the left slider 3 and the right slider 4 are respectively arranged on the left and right parts of the worm 6, and when the worm 6 rotates, the left slider 3 and the right slider 4 can be driven to move toward or away from each other along the worm 6; the inertia block 1 is located between the left slider 3 and the right slider 4, and is connected to the spring sheet 2; the motor 5 is connected to the worm 6 and can drive the worm 6 to rotate axially.

[0019] In this embodiment, the left and right parts of the worm 6 are respectively provided with external threads in different directions, and the left slider 3 and the right slider 4 are respectively provided with internal threads matching the threads of the left and right parts, and are respectively connected to the left and right threads of the worm 6 through their own internal threads.

[0020] Example 2

[0021] This embodiment provides a working method of the acceleration sensor described in Embodiment 1, and the specific process is as follows:

[0022] When the vehicle is ready to start on a slope or to descend a steep slope, the vehicle stops and the vehicle controller controls the motor 5 to drive the worm 6 to rotate, so that the left slider 3 and the right slider 4 move in opposite directions. As the vehicle stops on the slope, under the action of gravity, the inertia block 1 overcomes the elastic force of the spring sheet 2 to generate displacement, so that the potentiometer 7 outputs a signal, such as Figure 2 As shown. The greater the slope, the greater the displacement of the inertia block 1. The potentiometer 7 outputs a signal to the vehicle controller, which adjusts the brake according to the signal to achieve the function of starting on a slope or slow descent on a steep slope. It should be noted that Figure 2 The figure shows the situation of starting on a slope. If it is a steep slope descent, the inertia block will be displaced toward the left slider.

[0023] When the vehicle controller receives the signal from the potentiometer 7 and the signal no longer changes, the vehicle controller stores the signal for this ramp start or steep slope descent, and no longer receives new signals. Then, the power supply to the potentiometer 7 is stopped, and the motor 5 is controlled to drive the worm 6 to rotate in the opposite direction, so that the left slider 3 and the right slider 4 move toward each other until the inertia block 1 is clamped and fixed. Figure 3As shown. Since the inertia block 1 is clamped, the potentiometer 7 will not move no matter how the vehicle moves, thereby reducing the wear of the potentiometer 7; at the same time, since the potentiometer 7 is not powered, it will not heat up.

[0024] For those skilled in the art, various corresponding changes and modifications can be made according to the above technical solutions and concepts, and all of these changes and modifications should be included in the protection scope of the claims of the present invention.

Claims

1. An acceleration sensor for hill starting and steep slope descent, characterized in that: It includes an inertia block, a spring sheet, a left slider, a right slider, a motor, a worm and a potentiometer; the inertia block is connected to the potentiometer, and the potentiometer outputs a signal to the vehicle controller; the left slider and the right slider are respectively arranged on the left and right parts of the worm, and when the worm rotates, the left slider and the right slider can be driven to move toward or away from each other along the worm; the inertia block is located between the left slider and the right slider, and is connected to the spring sheet; the motor is connected to the worm and can drive the worm to rotate axially.

2. The acceleration sensor for hill start and steep slope descent according to claim 1, characterized in that: The left and right parts of the worm are respectively provided with external threads in different directions, and the left and right sliders are respectively provided with internal threads matching the threads of the left and right parts, and are respectively connected with the left and right threads of the worm through their own internal threads.

3. A method for operating the acceleration sensor according to any one of claims 1 to 2, characterized in that: The specific process is: When the vehicle is ready to start on a slope or to slowly descend a steep slope, the vehicle stops, and the vehicle controller controls the motor to drive the worm to rotate, so that the left and right sliders move in opposite directions; because the vehicle is parked on the slope, under the action of gravity, the inertia block overcomes the elastic force of the spring sheet to produce displacement, so that the potentiometer outputs a signal; the greater the slope, the greater the displacement of the inertia block; the potentiometer outputs a signal to the vehicle controller, and the vehicle controller adjusts the brake according to the signal to achieve the function of starting on a slope or slowly descending a steep slope; When the vehicle controller receives the signal from the potentiometer and the signal no longer changes, the vehicle controller stores the signal for this slope start or steep slope descent, no longer receives new signals, then stops supplying power to the potentiometer, and controls the motor to drive the worm to rotate in the opposite direction, so that the left slider and the right slider move toward each other until the inertia block is clamped and fixed; since the inertia block is clamped, the potentiometer will not move no matter how the vehicle moves, thereby reducing the wear of the potentiometer; at the same time, since the potentiometer is not powered, it will not heat up.

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