ESP inertial sensor combination and testing method thereof

Abstract

The invention discloses an ESP inertial sensor combination and a testing method thereof. The ESP inertial sensor combination comprises a power supply provided with circuits connected with each other, and is characterized by consisting of an MEMS angular velocity sensor, an MEMS acceleration transducer, an excess voltage / counter voltage protective circuit, a singlechip and a D / A digital-analog conversion circuit; a signal output terminal of the MEMS angular velocity sensor as well as a transverse signal output terminal and a longitudinal signal output terminal of the MEMS acceleration transducer are connected with an input terminal of the singlechip, and one output terminal of the singlechip outputs a yaw velocity signal and a transverse acceleration signal through the D / A digital-analog conversion circuit and the excess voltage / counter voltage protective circuit. By adopting the structure, the invention has the advantages that (1) the MEMS angular velocity sensor and the MEMS acceleration transducer are adopted to provide information of angular speed and acceleration for an ESP system; compared with the traditional electromechanical sensor and piezoelectric sensor, the MEMS angular velocity sensor and the MEMS acceleration transducer have low cost, small volume and good environmental suitability; (2) the singlechip and the D / A digital-analog conversion output proposal can be adopted, so that batch compensation is convenient, and the consistence of performance is superior to 1% after calibration.

Description

technical field [0001] The invention belongs to the application field of automotive electronic products, and in particular relates to an ESP inertial sensor combination and a detection method. Background technique [0002] With the continuous improvement of people's requirements for vehicle safety performance, active safety devices play an increasingly important role. Energy-absorbing bodywork, airbags, and seat belts can only solve problems after accidents, so these systems are only passive safety systems. With the development of modern car technology, the active safety of vehicles has also been greatly improved, and a new market for automotive electronics has also been opened up. The role of active safety is to prevent accidents to the greatest extent possible. [0003] ESP (Electronic Stability Program) system is a "vehicle electronic stability system" introduced by Bosch in 1995. It includes ABS and TCS, so it can prevent the wheels from locking (ABS) during braking. ...

AI Technical Summary

Problems solved by technology

However, the performance of MEMS sensors (such as MEMS angular velocity sensors and MEMS acceleration sensors), especially the accuracy and batch consistency, are not as good as traditional mechanical sensors, which limits their application in high-performance occasions.

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