Browse Prior Art Database

GPS BASED, ANTI- TAMPERING TAXI METER

IP.com Disclosure Number: IPCOM000009796D
Original Publication Date: 2000-May-01
Included in the Prior Art Database: 2002-Sep-19
Document File: 2 page(s) / 117K

Publishing Venue

Motorola

Related People

Neoh Kim Koon: AUTHOR

Abstract

This article describes a new application based on the Global Positioning System (GPS). The application utilizes a taximeter which is GPS-based, instead of on which is based on an odometer. This application is intended to minimize the occurrence of taximeter tampering by unscrupulous operators. As the GPS system provides worldwide coverage, this application can be used virtually anywhere in the world.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 39% of the total text.

MOTOROLA

Technical Developments

GPS BASED, ANTI- TAMPERING TAXI METER

By Neoh Kim Koon

INTRODUCTION

This article describes a new application based on the Global Positioning System (GPS). The application utilizes a taximeter which is GPS-based, instead of on which is based on an odometer. This application is intended to minimize the occurrence of taximeter tampering by unscrupulous operators.

As the GPS system provides worldwide coverage, this application can be used virtually anywhere in the world.

DESCRIPTION: BLOCK DIAGRAM

The block diagram below shows the main components of this application:

GPS Antenna

'D.l:J~

D~DD'

Fig. 1 GPS-Based TaxiMeter

There are 4 major parts, namely:

. The GPS Receiver

Motorola, Inc. 2000

. User input keypad unit

. Display Unit

. The Micro-controller unit

THE GPS RECEIVER

The GPS receiver is coupled to a GPS antenna to receive signals from the GPS satellites. The GPS antenna may be placed on the boot (trunk) of the taxi. The receiver processes the received signals to determine positional infom1ation. The GPS receiver module could be an off the shelf, for example the Motorola Oncore GT series.

The positional information is then fed to the micro-controller unit. The GPS Receiver could be set to send positional information every second to the micro-controller unit. The positional information indicates the location of the taxi, and is used to update location information which is stored in the buffer of the micro~controller unit.

THE MICRO-CONTROLLER UNIT

The Micro-controller unit includes firmware that runs this application including:

. Initializing the GPS receiver module.

. Accepting the position update information from the GPS receiver.

. Accepting the inputs from the User Keypad (to start/stop/setup the meter)

. Determining if the taxi is in motion and charging the distance traveled.

107

May 2000

MOTOROLA

Technical Developments

. Determine if the taxi is stationary (for exampIe: after picking up a passenger, and caught in a traffic jam), then charge as per the amount of time that the taxi is stationary.

. Display driver to drive the LED display unit to present the total distance covered and associated charges.

THE USER KEYPAD INPUT UNIT

The User Keypad Unit is used by the taxi driver to start, stop and setup the meter. It could also be used to set and reset, and to initiate the self -diagnos.

tic program of the meter.

THE DISPLAY UNIT

The display unit will be used to display the fol, lowing information:

. Self-diagnostic results

. Time

. Fees/Charges

. Total distance covered

THE ANTI- TAMPERING FEATURE

Since there are no mechanical connections as in the case of the conventional odometer-taxi meter arrangement, tampering is more difficult. The whole unit could be sealed and the only external connection would be to the GPS antenna.

ADVANTAGES AND BENEFITS OF THE APPLICATION

The product could increase the public's coDfidence on the integrity of Taxi fare meters. There would also be less issues of 'wear and tear' comp...