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Wheel speed acquisition module, device and method

A technology of wheel speed acquisition and wheel speed, which is applied in measuring devices, linear/angular speed measurement, speed/acceleration/impact measurement, etc., can solve the problems of no time, no speed information in low speed segments, etc., and achieve good fusion positioning accuracy Effect

Pending Publication Date: 2022-08-05
北京斯年智驾科技有限公司
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Problems solved by technology

[0004] The purpose of the present invention is to provide a wheel speed acquisition module, device and method thereof, to solve the problem of no speed information and no time in low speed section

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  • Wheel speed acquisition module, device and method
  • Wheel speed acquisition module, device and method
  • Wheel speed acquisition module, device and method

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Embodiment Construction

[0020] The embodiments of the present application will be described in detail below with reference to the accompanying drawings and examples, so as to fully understand and implement the implementation process of how to apply technical means to solve technical problems and achieve technical effects in the present application.

[0021] According to the present invention, there is a wheel speed measuring device on the vehicle, but there is no way to measure the low speed section, and there is no current time information, so it is necessary to measure the wheel speed information at the low speed end and record the current data time without destroying the original system.

[0022] The method adopted is to separate an interface at the outer end of the sensor, and design a detection module to connect to this interface to detect the wheel speed information, and the data at the detection time can be time stamped inside the module.

[0023] like Figure 1-2 As shown, the present inventi...

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Abstract

The invention relates to a wheel speed acquisition module, which comprises a signal input end U1I, the signal input end U11 is connected with wheel speed input ports LSP and LSN, the wheel speed input ports LSP and LSN are connected with a common mode E3, the common mode E3 is connected with a capacitor C50 and a capacitor C51, the capacitor C50 and the capacitor C51 are connected with a comparator, the capacitor C50 and the capacitor C51 are respectively connected with a pin 3 and a pin 4 of the comparator, and the capacitor C50 and the capacitor C51 are respectively connected with a pin 5 and a pin 6 of the comparator. And the comparator is also connected with a DCDC power supply module and an LDO (Low Dropout Regulator). The method has the beneficial effects that speed information acquisition and time information printing in a low-speed section are realized, so that when the data are sent to an upper computer, the wheel speed and other sensors (IMU and GNSS) can be aligned to the same moment by the upper computer, and good fusion positioning precision is formed.

Description

technical field [0001] The invention relates to the technical field of automatic driving speed measurement, in particular to a wheel speed acquisition module, a device and a method thereof. Background technique [0002] With the development of autonomous driving, the requirements for positioning are becoming more and more demanding. The current positioning requires GNSS + wheel speed + IMU + laser SLAM + visual SLAM to achieve. [0003] The existing wheel speed sensor is a problem in the low speed section, as long as the speed is lower than 5Km / h, it is difficult to measure the corresponding speed information, and the measured data has no time information. SUMMARY OF THE INVENTION [0004] The purpose of the present invention is to provide a wheel speed acquisition module, device and method thereof to solve the problems of no speed information and no time in the low speed section. [0005] To achieve the above object, the present invention provides the following technical...

Claims

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Application Information

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IPC IPC(8): G01P3/481G01P1/00
CPCG01P3/481G01P1/00
Inventor 张慧松刘羿何贝刘鹤云张岩
Owner 北京斯年智驾科技有限公司
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