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Electronic Standard Care Plans of Home-visit Nursing for Patients of Euronal Intractable Diseases Based on PCAPS

A microprocessor 214 obtains a vehicle travelled distance by multiplying the number of pulses by a distance factor R, the number of pulses having been outputted from a vehicle speed sensor 203 and having been counted by a counter 216. In addition, the microprocessor 214 estimates a current position on a road according to map data read out from a CD-ROM 205 via a driver 206, measured data from an angular velocity sensor 201 and a direction sensor 202 via A/D converters 209 and 210, and the obtained vehicle travelled distance. The road direction on the estimated current position and the vehicle direction obtained from the measured data of the angular velocity sensor 201 and the direction sensor 202, are compared, and in accordance with the angular difference therebetween and the information whether the driving road is a left turn or a right turn, it is determined whether the estimated current position is ahead or behind the actual position. With the result, the distance factor R can be dynamically modified. Therefore, it is possible to adequately correct the distance factor which is used for obtaining a travelled distance.