An Intelligent Integrated Sensor Of Tire Pressure Monitoring System (TPMS)
First Claim
1. An integrated multi-functional sensing system for tire pressure monitor system (TPMS), comprising:
- a pressure sensor, an accelerometer that monitors vehicle motion, LF transistors for initiazation of tire locations, and an ASIC that implements signal conditioning and digitalizes pressure output.
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Accused Products
Abstract
A single integrated sensing chip with multi-functions for tire pressure monitor system (TPMS) comprises: a pressure sensor, an accelerometer, a temperature sensor, and an ASIC (Applied Specific Integrated Circuit) that implements signal conditioning and digitalizes pressure output. The accelerometer incorporated for vehicle motion is used to determine centrifugal acceleration or three-axial acceleration of the rotating wheel, and used for the TPMS sensor wake-up from “power down” mode, or when the velocity of the vehicle is higher than certain speed threshold, which is more robust and lower in cost than the mechanical vibration switch and is naturally integrated with the electronic control unit. The accelerometer can be used for regular motion sensing to monitor the dynamic stability. The integrated sensor system can be packaged into one plastic package first, and then surface mounted to the printed circuit board, or the multi-function single chip can be wafer bonded on the wafer level first and diced into many individual chips, with each chip being directly attached on to the printed circuit board by wire bonding or flip-chip assembly.
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Citations
18 Claims
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1. An integrated multi-functional sensing system for tire pressure monitor system (TPMS), comprising:
- a pressure sensor, an accelerometer that monitors vehicle motion, LF transistors for initiazation of tire locations, and an ASIC that implements signal conditioning and digitalizes pressure output.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
Specification