JPH0644424A - Traveling recorder for vehicle - Google Patents

Abstract

PURPOSE:To realize the safe operation of a vehicle by providing a means for cutting off the transmission of data to an external input/output means from a vehicle running data storage means in the case a car speed is not zero. CONSTITUTION:A central processing unit 2 executes initialization for recording in accordance with a processing procedure stored in a ROM 3, calculates the car speed by measuring a signal from a car speed sensor 7 by an interruption processing and decides whether the car speed is higher than zero or not. When it is higher, that is, in the course of running, a communication interruption to an electronic notebook 10 is not permitted, and based on signals from sensors 7, 8, sampling of data of a car speed and an engine rotation is executed, and the data subjected to sampling is recorded in a RAM 4 and returned. On the other hand, in the case the car speed is zero, the communication interruption to the electronic notebook 10 is permitted. When the communication interruption is permitted, the interruption is generated by the operation of a communication shaft with the electronic notebook 10 and when a command from the electronic notebook 10 is a data command for receiving data from an on-vehicle device 1 by the electronic notebook 10 side, operation data are transmitted to the electronic notebook 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle operation recording device provided with vehicle running data storage means, external input / output means, and analysis means.

[0002]

2. Description of the Related Art Regarding such a device, the applicant of the present invention is
No. 14418 and Japanese Utility Model Application No. 3-15332.

In these devices, at the end of operation, the external input / output means is connected to the vehicle travel data storage means, the operation data recorded in the storage means is transmitted, and the vehicle travel data is transmitted from the external input / output means by the analysis means. It is designed to read and analyze.

[0004]

At this time, if the vehicle is traveling, incomplete vehicle traveling data is transmitted and the operation of the external input / output means is involved, which causes a problem in safe driving.

It is an object of the present invention to prevent the data from being transmitted from the vehicle traveling data storage means to the external input / output means while the vehicle is traveling and to ensure the safe operation of the vehicle.

[0006]

According to the present invention, in a vehicle operation recording apparatus provided with vehicle traveling data storage means, external input / output means, and analysis means, vehicle traveling is performed when the vehicle speed is not zero. Means are provided for blocking the transmission of data from the data storage means to the external input / output means.

The above means is preferably provided in the main processing program of the vehicle running data storage means.

[0008]

In the vehicle operation recording apparatus configured as described above, the main processing is performed even when the vehicle traveling data storage means and the external input / output means are connected while the vehicle is traveling, that is, when the vehicle speed is other than zero. The program determines that communication interrupts are not possible. This cuts off the transmission of data.
As a result, data transmission to the external input / output means is completely prevented.

[0009]

Embodiments of the present invention will be described below with reference to the drawings.

In FIG. 1, an operation recording device for a vehicle includes vehicle traveling data storage means, that is, an on-vehicle device indicated by reference numeral 1, and external input / output means selectively connected to the on-vehicle device 1, that is, a known electronic notebook. 10 and an analysis means provided in an office (not shown), that is, a personal computer.

The vehicle-mounted device 1 includes a central processing unit (CP
U) 2, ROM (ROM) 3 and RAM (RAM) 4 are provided in parallel. The central processing unit 2 has a vehicle speed sensor 7 and an engine rotation sensor 8 via an interface 5.
The electronic notebook 10 is selectively connected to the ram 4 via the communication interface 6.
A power source 9 is connected to these members 2 to 6.

Next, the control mode will be described.

FIG. 2 shows a main processing flow, in which the central processing unit 2 performs initialization for operation recording according to the processing procedure stored in the ROM 3 (step S
1), the signal from the vehicle speed sensor 7 is measured by interrupt processing to calculate the vehicle speed, and it is determined whether the vehicle speed is greater than zero (step S2). If YES, that is, while traveling, the communication interruption with the electronic notebook 10 is disabled (step S3), and the vehicle speed and engine rotation data are sampled based on the signals from the sensors 7 and 8 (step S3).
5) The sampled data is recorded in the RAM 4 (step S6) and the process returns. Also, step S2
When is NO, that is, when the vehicle speed is zero, the electronic notebook 1
The communication interruption with 0 is permitted (step S4).

FIG. 3 shows a flow of communication interruption. When the communication interruption is permitted, an interruption occurs due to the operation of starting communication in the electronic notebook 10, the command from the electronic notebook 10 is read (step S10), and the command is
The electronic notebook 10 side determines whether or not the command is a data reception command for receiving data from the vehicle-mounted device 1 (step S1).
1) If YES, the operation data is transmitted to the electronic notebook 10 (step S12), and the process returns. If NO, that is, if the electronic notebook is a command to transmit the processing condition data, the processing condition data is received, The data is stored in the RAM 4 (step S13) and the process returns.

[0015]

Since the present invention is configured as described above, it is possible to completely prevent data transmission from the vehicle-mounted device to the electronic notebook when the vehicle is traveling, and to achieve safe driving.

[Brief description of drawings]

FIG. 1 is a control block diagram showing an embodiment of the present invention.

FIG. 2 is a main processing flow chart.

FIG. 3 is an interrupt processing flowchart.

[Explanation of symbols]

 1 ... vehicle-mounted device 2 ... central processing unit 3 ... ROM 4 ... RAM 5 ... interface 6 ... communication interface 7 ... vehicle speed sensor 8 ... engine rotation sensor 9 ...・ Power supply 10 ・ ・ ・ Electronic notebook

Claims (1)

[Claims] 1. A vehicle operation recording apparatus comprising a vehicle travel data storage means, an external input / output means, and an analysis means, wherein the vehicle travel data storage means transfers to the external input / output means when the vehicle speed is not zero. An operation recording device for a vehicle, which is provided with means for cutting off data transmission.