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| 型號(hào)： | AN238 |
| 廠商： | Microchip Technology Inc. |
| 英文描述： | Tire Pressure Monitoring (TPM) System |
| 中文描述： | 胎壓監(jiān)測(cè)（TPM）系統(tǒng) |
| 文件頁(yè)數(shù)： | 1/12頁(yè) |
| 文件大?。?/td> | 426K |
| 代理商： | AN238 |
2004 Microchip Technology Inc.
DS00238B-page 1
AN238
INTRODUCTION
This document explains a typical tire pressure monitor-
ing (TPM) system specifically intended for automotive
use. It serves as a reference to design a real-world
system based on various Microchip products. A TPM
system primarily monitors the internal temperature and
pressure of an automobile's tire. There is a variety of
system approaches to follow, although this one is a
rather comprehensive auto-location system.
An auto-location system can dynamically detect the
position of a specific sensor, which is useful when tires
are rotated. The heart of the TPM system is the
Sensor/Transmitter (S/TX) device and it is based on
Microchip's rfPIC12F675.
SYSTEM COMPONENTS
The TPM system consists of the following major
component.
Sensor/Transmitter Device
RF Receiver Module
Low Frequency (LF) Commander Device
Control Unit
Pressure Vessel (Tire)
FIGURE 1:
TIRE PRESSURE MONITORING (TPM) SYSTEM
Authors:
Ruan Lourens
Microchip Technology Inc.
Curtis Kell
Kell Laboratories
Tire Pressure Monitoring (TPM) System
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