JPS60111919A - Non-contact type memory cassette - Google Patents

Abstract

PURPOSE:To attain to reduce the number of signal wires, by transmitting a signal serially by optical communication and bringing the connector part of an operation recorder and a memory cassette to a non-contact system. CONSTITUTION:When data to be recorded is generated from an operation recorder 1 to a memory cassette 2, flag data 41, an address 42 and transmission data 43 are serially supplied to a serial communication interface 10 by the microprocessor 13 mounted in the recorder 1 and encoded. These serial encoded data are transmitted by optical communication through LED61 and the phototransistor 62 of a connector 6 and stored in IC memory 23 through the serial communication interface SCI21 and the microprocessor MPU22 of the cassette 2. The transmission of the data of the cassette 2 to the recorder 1 is also similarly performed. By this mechanism, the connector part of the operation recorder and the memory cassette is brought to a non-contact system and the number of signal transmitting wires are reduced while the environmental resistance and operability of the memory cassette are enhanced.

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a method for connecting a memory cassette for recording data in a driving record a1 for recording vehicle speed, engine speed, and driver information of an automobile. It is something.

[Background of the invention]

Special 1.11° as a conventionally devised driving recorder
LIIQ No. 82-3500 is mentioned, and the 41 development of the driving recorder disclosed therein will be explained based on FIG. Figure 1 is a block diagram of a driving recorder.The driving recorder is a data collection unit that collects and processes data.
, a memory cassette 1 to 2 for recording data, and a keyboard 3 for inputting data.The MPUI:3 receives vehicle speed and engine speed from a vehicle speed sensor 4 and an engine speed sensor 5 via an I10 circuit 11, and calculates them. Processed and compressed data is passed through the 110 circuit 18 to the controllers 1 to 1.
Data is recorded in the memory cassette 2 connected to the connector 6 by a roll & data bus 19. In addition, the time generated by the actual time occurrence time 'Jl'r], 4 is displayed on the display 17 via the 1.10 circuit 15, and the car number set on the car number switch 16 is also displayed as the vehicle speed. Recording is performed on the memory cassette 2 in a similar manner. Therefore, information from the driver inputted manually from the keyboard 3/J is also transmitted to the MPU via the I10 circuit 15, and the real time generating circuit 1/I
Both the time data obtained by 17070 circuit 18
The data is then recorded in the memory cassette 2 via the controller I to roll & data bus 19.

Here, the driving recorder 1 and the memory cassette 1-2 are connected by a connector 6, but since the number of signal lines of the control & data bus 19 is large, it is difficult to connect and disconnect the connector 6. be. In addition, contact-type connectors require mechanical strength, so there are also cases where the structure is large.

In order to improve these shortcomings, the connection part of the connector 6 and the non-contact force! It is conceivable that it would be better to use I+ and transmit/receive 43 optically, but if this was done with the current control and data bus 19, a drawback would arise, which is not shown in FIG. FIG. 2 shows the current connector 6 in which a photodiode 61 is optically connected by a bare phototransistor 62. Since control 1-roll lines 190 to 191 are unidirectional,
This can be done with one pair of port 1 header die A-driver 1 and phototransistor 62, but since the data buses 192 to 193 are bidirectional, two pairs of photodiode 61 and phototransistor 62 are required in each direction for transmission and reception. . In addition, a human output circuit vj163 for controlling the direction of the data bus is also required, and the connector 6 is more complicated than a contact type because it requires more human intervention.

[Purpose of the invention]

The present invention relates to a connector part that connects a driving recorder and a memory cassera 1 to 1, and the connector part is a non-contact type connector, and
The purpose is to improve the ring resistance and operability of memory cassettes by reducing the number of signal lines.

[Summary of the invention]

When connecting the driving recorder to the memory cassette 1-, the number of signal lines is reduced by serial transmission, and the connection is made non-contact by replacing the signal line with a pair of photodiodes and bottom transistors.

[Embodiments of the invention]

Hereinafter, the present invention will be explained in detail using examples.

FIG. 3 is a block diagram of the present invention.
l) The controller 1-role and data bus 19 from U13 is connected to the serial communication interface circuit 1O.
Two signal lines, an output signal MIOJ and an input signal line 102, are connected to the connector 6. The connector 6 connects the phototransistor 2 to the output signal line 101, and the input signal line 102 connects the phototransistor 2 to perform optical transmission.

On the other hand, memory cassette l-2 also corresponds to data collector 1,
A serial communication interface circuit 21 and MPU 22 are newly installed, and these and IC memory 2
3, data is recorded. FIG. 4 does not show the transmission format during data transmission.

A detailed explanation of the operation will be given below based on the drawings.

When data to be recorded in the memory cassera 1 and 2 is generated, the M I) LJ 13 in the data collector l is connected to the controller I-a.
- transmission data 43 and address 42 in memory and '! :・Sends flag data 41 indicating that data is to be loaded to the serial communication/r interface circuit 1o. The serial communication interface circuit serially encodes this flag data 41, address 42, and transmission data 43, and sends it out as an output signal &'A 101.

This serial signal is sent to the photodiode 61 in the connector 6.
The signal is optically transmitted by the bare terminal 1-1 and 2, and is manually input to the serial communication interface circuit 21 in the memory cassette 1-2 via the input signal line 202. Then, the serial communication interface circuit 21 converts these serial signals into parallel signals and sends them to MI via the controller 1-roll wave data bus 14.
) Send to U22.

M I) U 22 determines that memory data will be written based on the flag data 41 from the series of information sent, and writes the IC memory 2 corresponding to the sent address 42.
Input the transmission data 43g, -, Ii to address 3.

On the other hand, when the MPtJ13 in the collector 1 wants to read the data in the memory cassette 2, it adds the address 42 in the memory of the data to be read and the read flag data 41,
Send data to serial communication interface circuit 10. Hereafter, in the same procedure as when writing data, this data is written to MI in memory cassera 1 to LJ 2.
Sent to 2. M I) LJ22 is flag data 41
It is determined that data is being read, and the sent address 4 is
The data stored in the address of the IC memory 23 corresponding to 2 is read out. Then, this data is set as transmission data 43, address 42 and read flag data 41.
Serial communication interface circuit 2
1, and the same procedure as in the case of collector 1, the collector l
Send it back to Il'U13 inside. M I) When U13 receives this data, it determines that the read data has returned,
Move on to the next process.

〔Effect of the invention〕

According to the present invention, the driving recorder is provided with a serial communication interface circuit, and the memory cassette 1- is provided with a serial communication interface circuit Ml).
By adding U, data transmission and reception can be serially transmitted, reducing the number of green signals to a large number [1], and by making the connector part optical transmission, there is no contact, simplifying the handling of memory cassettes. This has the effect of improving operability and ring resistance.

Wit, 'l'-explanation of the drawings: The first is a block diagram of the driving recorder, the second is a detailed diagram of the connector, the third is a serial transmission block diagram, and the fourth is a diagram of the transmission format 1. be.

l...Operation recorder, 2...Memory cassette, 4...
・Vehicle speed sensor, 5...Engine rotation sensor, 13...
・M ■) tJ, 10... Serial communication interface, 61... Photodiode, 62.
...Phototransistor, 21...Serial communication ink Fig. 1 Fig. 20

Claims (1)

[Claims] ■Vehicle speed detector and engine revolution speed detector to periodically capture the vehicle speed and engine speed, display circuit to display the time, keyboard etc. to input work information or cargo information from one hand, etc. In a motor vehicle operation recorder in which a microprocessor processes data sent from a microprocessor and records the data in a removable recording cell I-, an optical 'I' means that a serial transmission method using communication is used, a microprocessor is provided in the recording cell 1, and the microprocessor is provided with a control function for serial transmission. A non-contact type memory cassette with -r characteristics.