Integrated sensing unit and method for determining the vehicle wheel speed and tire pressure

A wheel speed, tire pressure technology used in the use of acceleration for speed measurement, tire measurement, vehicle components, etc., to solve problems such as redundant sources of wheel speed readings, increasing the cost and complexity of vehicle systems

Inactive Publication Date: 2017-01-04
GM GLOBAL TECH OPERATIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the introduction of additional wheel speed sensors, which rely on their own circuitry, wiring and transmission mechanisms, can add cost and unnecessary complexity to existing vehicle

Method used

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  • Integrated sensing unit and method for determining the vehicle wheel speed and tire pressure
  • Integrated sensing unit and method for determining the vehicle wheel speed and tire pressure
  • Integrated sensing unit and method for determining the vehicle wheel speed and tire pressure

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Embodiment Construction

[0011] The integrated sensing systems and methods described herein can be used to provide wheel speed and tire pressure readings, and more specifically, can provide redundancy for wheel speed sensors that are already part of existing vehicle systems. The integrated sensing system and method utilizes an integrated sensing unit that includes a tire pressure sensor and an IMU that are mounted together on a vehicle wheel and can communicate wirelessly with the rest of the system. By integrating the IMU with the existing vehicle TPM system, cost and system complexity can be reduced because the IMU can use some of the TPM system's functions.

[0012] Typically, wheel speed is measured using wheel speed sensors such as figure 1 This is determined by the depicted wheel speed sensors 22 - 28 , which are fixedly mounted on the vehicle and evaluate nearby rotating wheels. In the illustrated embodiment, individual wheel speed sensors 22 - 28 are operably coupled to each of the four wheel...

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Abstract

An integrated sensing unit and method that involves wirelessly transmitting tire pressure sensor readings and wheel speed readings to a control module in a vehicle. Sensor circuitry for a tire pressure monitoring (TPM) system can be used with an inertial measurement unit (IMU) in an integrated sensing unit to facilitate the wireless transmittance of wheel speed data. In an exemplary embodiment, the wheel speed data from the integrated sensing unit provides a redundant measure of wheel speed that can prolong the availability of vehicle systems that rely upon wheel speed, despite a potential malfunction of one or more typical wheel speed sensors.

Description

technical field [0001] The present invention relates generally to determining vehicle wheel speed, and more particularly to an integrated sensing unit mounted on a vehicle wheel that combines a tire pressure monitoring (TPM) system and an inertial measurement unit (IMU) for Determine wheel speed. Background technique [0002] Various vehicle systems rely on accurate determination of vehicle wheel speed for proper operation. For example, autonomous driving systems often use redundant wheel speed readings to verify that determined wheel speeds are an accurate representation of actual wheel speeds. However, the introduction of additional wheel speed sensors, which rely on their own circuitry, wiring and transmission mechanisms, can add cost and unnecessary complexity to existing vehicle systems. Thus, by integrating an IMU into an existing vehicle system such as a TPM system, cost and system complexity can be reduced, but still provide a redundant source of wheel speed readin...

Claims

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Application Information

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IPC IPC(8): B60C23/04B60R16/023
CPCB60C23/0481B60C23/0488B60T2220/04G01P7/00B60C23/0433B60R16/023
Inventor W·M·拉扎尔二世J·A·雅各布
Owner GM GLOBAL TECH OPERATIONS LLC
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