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Road surface condition estimation device

A technology for inferring the state of devices and road surfaces, applied in the direction of electrical devices, measuring devices, power devices, etc.

Inactive Publication Date: 2020-10-09
AISIN SEIKI KK +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the prior art as described above is based on the premise that the number and position of the driving wheel and the driven wheel are fixed, so it cannot be directly applied to the so-called Vehicles with independent four-wheel drive

Method used

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Embodiment Construction

[0024] Embodiments of the present disclosure will be described below based on the drawings. The configuration of the embodiment described below and the actions and effects brought about by the configuration are just examples, and are not limited to the following description.

[0025] figure 1 It is an exemplary and schematic block diagram showing the structure of the vehicle V according to the embodiment. Such as figure 1 As shown, the vehicle V according to the embodiment is configured as a four-wheeled vehicle including front wheels 10FL and 10FR and rear wheels 10RL and 10RR. In addition, hereinafter, the front wheels 10FL and 10FR and the rear wheels 10RL and 10RR may be collectively referred to as wheels 10 .

[0026] The vehicle V according to the embodiment is a so-called four-wheel independent drive type (electric) vehicle in which the number and positions of driving wheels and driven wheels can be arbitrarily set / changed.

[0027] That is, the vehicle V includes f...

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PUM

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Abstract

The invention provides a road surface condition estimation device. A road surface condition estimation device (200) includes a control circuit (201), an acquisition circuit (202) and an estimation circuit (203). The control circuit (201) is configured to control a driving device that is able to independently drive a plurality of wheels. The acquisition circuit (202) is configured to acquire detection results of a plurality of wheel speed sensors that detects rotation speeds of the plurality of wheels respectively. The estimation circuit (203) is configured to calculate a slip ratio for each driving wheel, based on a detection result of a first wheel speed sensor and a detection result of a second wheel sensor. The estimation circuit (203) is configured to estimate a friction coefficient for each region on a road surface that corresponds to the driving wheel, based on the slip ratio.

Description

technical field [0001] The present disclosure relates to a road surface state estimation device. Background technique [0002] A technique for calculating the coefficient of friction of a road surface on which a vehicle travels is studied. As such a technique, for example, in a vehicle of a two-wheel drive system in which two wheels to be driven as drive wheels and two wheels to be driven as driven wheels are predetermined, there is known a vehicle based on driving as a drive wheel. A technology that calculates the slip rate from the average value of the rotation speeds of the two wheels and the average value of the rotation speeds of the two driven wheels, and estimates the friction coefficient of the road surface based on the slip rate. [0003] However, the prior art as described above is based on the premise that the number and position of the driving wheel and the driven wheel are fixed, so it cannot be directly applied to the so-called A vehicle with four-wheel indep...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60W40/068G01N19/02
CPCB60W40/068G01N19/02B60K7/0007B60L3/102B60L15/2036B60L2220/42B60L2220/46B60L2240/24B60L2240/461B60L2240/465B60L2240/642B60L2260/28B60L2260/44B60W30/18172B60W50/14B60W2520/26B60W2520/28B60W2540/18B60W2720/403B60W2720/406B60Y2200/91B60W2552/15B60W2552/40Y02T10/64Y02T10/72Y02T90/16
Inventor 野间硕丹羽荣二川崎裕章前田悠辅小川文治加藤和广
Owner AISIN SEIKI KK