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An anti-tipping device and method for an electric wheelchair including an acceleration sensor

An acceleration sensor, electric wheelchair technology, applied in the field of control, can solve the problems of rough road conditions outside the accessories, poor user experience, and easy occurrence of danger, etc., to improve the user experience, improve the tilting situation, and prevent the effect of tipping over.

Active Publication Date: 2018-08-21
JERRY MEDICAL INSTR (SHANGHAI) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The electric wheelchair is easy to control and easy to use, but due to the independent operation, the road conditions outside the accessories are rough, and it is easy to overturn when going up and down.
In the process of wheelchair driving, the vehicle body is inclined due to road problems, which is prone to danger, and the inclination also causes the user's psychological fear, making the user experience very poor.

Method used

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  • An anti-tipping device and method for an electric wheelchair including an acceleration sensor
  • An anti-tipping device and method for an electric wheelchair including an acceleration sensor
  • An anti-tipping device and method for an electric wheelchair including an acceleration sensor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] An anti-rolling device for an electric wheelchair containing an acceleration sensor, including an acceleration sensor, an inclination monitoring module, a seat, a support platform, a horizontal frame, a motor system, and a wheel set. The support platform includes an upper platform composed of a moving platform And a lower platform composed of a fixed platform, the seat is arranged on the movable platform, the bottom of the fixed platform is connected with the horizontal frame, and the motor systems are all arranged below the horizontal frame.

[0040] The inclination monitoring module is arranged directly under the fixed platform of the wheelchair, such as figure 2 As shown, the inclination monitoring module 6 includes a first communication unit 61, a main control unit 62, a signal acquisition unit 63, a motor drive control unit 64, and an alarm unit 65. The signal acquisition unit 63 collects an acceleration sensor and converts acceleration into Analog voltage signal outp...

Embodiment 2

[0057] The difference from Example 1 is:

[0058] In the tilt monitoring module, the signal acquisition unit adopts the ADXL345 sensor chip. The ADXL345 sensor chip can not only measure the static acceleration of gravity of the object to be measured in tilt detection applications, but also measure the dynamic acceleration caused by motion or impact, with high resolution Significant advantage, can measure less than 1.0 ゜ tilt angle change, and the measurement range is large. The signal acquisition unit needs to use an IIC interface to access, and the output is a voltage signal with a linear relationship with the tilt angle.

[0059] The main control unit uses the STM32 chip as the main controller. This chip has high speed, low power consumption, and excellent performance of super anti-interference, and the instruction code is fully compatible with traditional single-chip microcomputers, and its operating speed is 8-12 times faster than single-chip microcomputers. There are MAX810 d...

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Abstract

The invention relates to an electric wheelchair rollover protection device containing an acceleration sensor and a method. The rollover protection device comprises the acceleration sensor, an inclination angle monitoring module, a seat, a supporting platform, a horizontal frame, a motor system and a wheel group; by detecting the acceleration sensor, the angles in the left and right rolling direction and the front-and-back trimming direction are obtained through calculation, a parallel robot is designed and used for improving the degree of freedom of a mobile platform, and therefore on the condition that a fixed platform is inclined, the wheelchair can improve the inclination situation of the mobile platform through posture adjustment of the parallel robot. A motor driving control unit is set to start a processing program, on the condition that inclination of the fixed platform reaches a first threshold value or a second threshold value, the electric wheelchair can automatically slow down and move slowly, and the maximum speed and the maximum acceleration are decreased; on the condition that the inclination of the fixed platform reaches a third threshold value or a fourth threshold value, the electric wheelchair starts an emergence program and stops going forwards, the parallel robot is started to work to compensate the inclination degree, rollover caused by too much inclination is prevented, the inclination sense of a user sitting on the seat is reduced, the user experience is improved, and the user security is guaranteed.

Description

Technical field [0001] The invention relates to the field of control, and in particular to an anti-rolling device and method for an electric wheelchair including an acceleration sensor. Background technique [0002] Wheelchairs are the main means of transportation for the elderly and the disabled to help them improve their freedom of movement and complete their daily work and life. The electric wheelchair is easy to control and easy to use. However, due to the independent operation, the road conditions outside the accessories are rugged, and it is prone to tipping accidents when going up and down. In the process of wheelchair driving, the vehicle body is tilted due to road problems, which is prone to danger, and the tilt also causes the user's psychological fear and makes the user experience very poor. In order to prevent the problems caused by the tilt of the car body, it is necessary to monitor the tilt angle in real time, and on the basis of the monitoring, improve the wheelc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61G5/10
CPCA61G5/10
Inventor 单新颖樊瑜波闫和平兰陟潘国新杨荣
Owner JERRY MEDICAL INSTR (SHANGHAI) CO LTD
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