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Electric vehicle tire pressure monitoring method and system

A technology for tire pressure monitoring and electric vehicles, applied in tire measurement, vehicle parts, tire parts, etc., can solve problems such as poor user experience, difficulty in popularization, and low precision, so as to improve safety, increase accuracy, and reduce errors The effect of rate of return

Inactive Publication Date: 2021-04-09
JIANGSU AIMA VEHICLE SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are two existing tire pressure monitoring solutions: direct tire pressure monitoring and indirect tire pressure monitoring: 1. Direct tire pressure monitoring, using built-in or external sensors based on Infineon SP37 or similar chips to monitor tire pressure Direct monitoring, but the cost of this solution is high, and it is difficult to popularize it on electric vehicles
2. Indirect tire pressure monitoring, using the Hall wheel speed sensor or magnetoelectric wheel speed sensor to obtain the tire speed, and compare the front and rear wheel speeds to determine whether the tire pressure is normal. However, this solution has low precision and is prone to false alarms. Difference

Method used

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  • Electric vehicle tire pressure monitoring method and system

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Embodiment 1

[0024] In this embodiment, the method for monitoring the tire pressure of an electric vehicle specifically includes:

[0025] The wheel speed signal of the front wheel of the electric vehicle is obtained through the wheel speed sensor installed on the front wheel of the electric vehicle, and the wheel speed signal of the rear wheel of the electric vehicle is obtained through the wheel speed sensor installed on the rear wheel of the electric vehicle.

[0026] The wheel speed signals of the front wheels of the electric vehicle and the wheel speed signals of the rear wheels of the electric vehicle are transmitted to the processing unit.

[0027] The signal processing unit processes the received wheel speed signal based on the frequency domain method and the wheel speed comparison method, and judges whether the tire pressure of the front and rear wheels of the electric vehicle is normal.

[0028] Specifically, in this embodiment, the wheel speed sensor installed on the rear wheel ...

Embodiment 2

[0037] This embodiment discloses an electric vehicle tire pressure monitoring system applying the electric vehicle tire pressure monitoring method provided in the first embodiment above. The system includes: a wheel speed sensor installed on the front wheel of the electric vehicle, a wheel speed sensor installed on the rear wheel, and Processing unit; the wheel speed sensor installed on the front wheel of the electric vehicle is used to obtain the wheel speed signal of the front wheel of the electric vehicle; the wheel speed sensor installed on the rear wheel of the electric vehicle is used to obtain the wheel speed signal of the rear wheel of the electric vehicle The processing unit is used to process the received wheel speed signal based on the frequency domain method and the wheel speed comparison method, and judge whether the tire pressure of the front and rear wheels of the electric vehicle is normal.

[0038]Specifically, in this embodiment, the wheel speed sensor install...

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Abstract

The invention discloses an electric vehicle tire pressure monitoring method and system, and the method comprises the steps: obtaining a wheel speed signal of a front wheel of an electric vehicle through a wheel speed sensor installed at the front wheel of the electric vehicle, and obtaining a wheel speed signal of a rear wheel of the electric vehicle through a wheel speed sensor installed at the rear wheel of the electric vehicle; transmitting the wheel speed signal of the front wheel of the electric vehicle and the wheel speed signal of the rear wheel of the electric vehicle to a processing unit; enabling the signal processing unit to process the received wheel speed signals based on a frequency domain method and a wheel speed comparison method and judging whether the tire pressure of front and rear wheels of the electric vehicle is normal or not. Wheel speed signals are processed and calibrated in a mode of combining a frequency domain method and a wheel speed comparison method, whether the tire pressure of the electric vehicle is normal or not is monitored, repeated proofreading is carried out before alarming to the maximum extent, the accuracy is effectively improved, and the false alarm rate is reduced. According to the invention, the riding safety of the electric vehicle is improved, the probability of accidents is reduced, and the intensified tire wear and the reduced endurance mileage caused by the pressure loss of the tire are avoided.

Description

technical field [0001] The invention relates to the technical field of tire pressure monitoring, in particular to a tire pressure monitoring method and system for an electric vehicle. Background technique [0002] An electric vehicle is a vehicle that uses a battery as an energy source, and converts electrical energy into mechanical energy through controllers, motors and other components to control the current and change the speed. When the tire pressure is low, the braking distance of the vehicle will be longer, the stability will be worse, the tire wear will be increased, and the cruising range will be reduced. There are two existing tire pressure monitoring solutions: direct tire pressure monitoring and indirect tire pressure monitoring: 1. Direct tire pressure monitoring, using built-in or external sensors based on Infineon SP37 or similar chips to monitor tire pressure Direct monitoring, but the cost of this solution is high, and it is difficult to popularize it on ele...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60C23/04B60C23/00
CPCB60C23/0488B60C23/00
Inventor 邱鹏
Owner JIANGSU AIMA VEHICLE SCI & TECH
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