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High-precision vehicle-mounted road grade detection device and method

A technology of road slope and detection method, which is applied in the directions of measuring devices, surveying and navigation, and measuring inclination, etc., which can solve the problems of low detection accuracy, inability to meet the actual needs of high-precision vehicle navigation systems, and narrow application range

Inactive Publication Date: 2013-10-16
XI AN JIAOTONG UNIV
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Problems solved by technology

However, the existing vehicle-mounted inclination detection devices generally have the following problems: (1) The acceleration and inclination angle information of the vehicle body is obtained by differentiating the current vehicle speed or performing A / D sampling on the analog signal of the traditional two-axis acceleration sensor. Both have defects and deficiencies such as low detection accuracy and narrow application range; (2) Using a single sensor node for data detection, this method of data description is one-sided, and is easily affected by factors such as temperature, voltage, and electromagnetics, resulting in poor data reliability
Therefore, the current detection device cannot meet the actual needs of high-precision vehicle navigation systems

Method used

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  • High-precision vehicle-mounted road grade detection device and method
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  • High-precision vehicle-mounted road grade detection device and method

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Embodiment Construction

[0034] Further detailed description and explanation will be made below in conjunction with the accompanying drawings.

[0035] refer to figure 1 and figure 2 , a high-precision vehicle-mounted road gradient detection device, comprising a main control node 2 and detection nodes 1 distributed throughout the vehicle body, the detection node 1 communicates with the main control node 2 through a CAN bus; the plane where the detection node 1 is located and The chassis plane of the car body is parallel, and the detection node 1 includes a sensor detection module 3, a micro-control module 4, a CAN communication module 5 and a power management module 6; the sensor detection module 3 adopts a three-axis digital acceleration sensor; the micro-control module 4 adopts TI's Ultra-low power consumption MSP430F149 single-chip microcomputer; CAN communication module 5 is composed of bus control chip 7 and driver chip 8; bus control chip 7 is MCP2510 from Microchip Company, which has stable p...

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Abstract

The invention discloses a high-precision vehicle-mounted road grade detection device and method, which are applicable to the field of a car navigation system and smart car electronics. The device is composed of a mastering node and detection nodes, which are hooked on a vehicle-mounted CAN (controller area network) bus. Each detection node comprises a triaxial acceleration sensor, a microcontroller, a power supply and a CAN communication module. The detection method of the device comprises the following steps that: a dip angle of each detection node relative to a reference plane, namely a surface water plane, is calculated by the output value of the corresponding triaxial acceleration sensor and transmitted to the mastering node by the CAN bus; the mastering node acquires detection node data through polling and performs fusion processes including careless error elimination, least squares fit and Kalman filtering on the acquired data to obtain an optimal estimate value of the grade of a road on which a vehicle runs. According to the invention, the triaxial digital acceleration sensor is used to calculate the dip angle, and the fusion processes are performed on the data of the multiple sensors, so that the precision of the vehicle-mounted road grade detection can be improved to 0.5 degree.

Description

technical field [0001] The invention relates to the technical field of vehicle navigation systems and intelligent vehicle electronics, in particular to a high-precision vehicle-mounted road slope detection device and method. Background technique [0002] With the rapid development of automation technology, the car navigation system has become one of the important components in the field of smart car electronics. It can not only provide drivers with comprehensive geographic road condition information, but also help them make safe and reliable control strategies. Accurately detecting the slope of the road currently traveling on the vehicle body is one of the necessary functions of the vehicle navigation system. However, the existing vehicle-mounted inclination detection devices generally have the following problems: (1) The acceleration and inclination angle information of the vehicle body is obtained by differentiating the current vehicle speed or performing A / D sampling on t...

Claims

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Application Information

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IPC IPC(8): G01C9/00
Inventor 汪志伟李龙飞江申段泽能杜奕凡黄浪王晶
Owner XI AN JIAOTONG UNIV
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