JP2001052223A - Recording method for operation data of vehicle using digital operation recorder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a recording method for vehicle operation data using a digital operation recorder. SOLUTION: This method includes a stage wherein while a header FF indicating the start of new operation is recorded on a recording medium each time the recording medium is set, information showing whether or not the recording medium is set on the operation recorder is recorded in the operation recorder and a characteristic number given previously to the recording medium is stored in the operation recorder when the recording medium is set, a stage wherein operation data begin to be recorded after a header FE indicating the start of the recording of the operation data is recorded, a stage wherein the operation data begins to be recorded after a header FE indicating the new recording start of the operation data is recorded on the recording medium when the CPU of the operation recorder due to a drop in the source voltage of the operation recorder and the source voltage recovers thereafter, and a stage wherein the characteristic number is read out of the recording medium and it is judged whether or no the read number is the same as the intrinsic number of a recording medium which was set before the resetting.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for recording vehicle operation data using a digital operation recorder.

[0002]

2. Description of the Related Art An operation recorder mounted on a vehicle is used to record operation data of a vehicle such as a truck on a recording medium such as a memory card in a digital manner. The operation data is composed of three elements: a traveling speed (vehicle speed) of the vehicle, a traveling distance, and a time. After the operation record is started when the memory card is set in the operation recorder, when the engine is started, the three elements are transferred to the memory card. Is started, and the three elements are automatically recorded on the memory card every 0.5 seconds, for example. Thereafter, the digital data recorded on the memory card is read by a card reader provided in, for example, an office of a transportation company, and the digital data received from the card reader by, for example, a personal computer connected to the card reader by a signal line for 24 hours. Record charts and the like are created.

[0003]

However, as shown in FIG.
As mentioned above, the three elements are recorded while the truck is running.
When the power supply voltage of the operation recorder drops, the operation
If the recorder CPU is reset, then the power supply voltage
Until it returns, that is, t₁~ T_TwoDuring the time
Although the above three factors are not recorded on the memory card,
The vehicle speed waveform shown by the solid line B as if it was zero
It will be created in the record chart. Actually t₀~
t_ThreeDuring the time, the truck is running continuously and t₁~ T
_TwoDuring the time, for example, the running corresponding to the vehicle speed waveform indicated by the dotted line E
It is expected that the line was going. This can happen
This is because the program used by the operation recorder has a low power supply voltage
Because it is not created to be compatible with the processing at the time
is there. Therefore, the memory card operates when the power supply voltage drops
It will be in the same state as set on the recorder, t₀~ T _Three
The operation record between the times will be interrupted. In this case,
Since the vehicle speed waveform B is created in the recorded chart,
The line record will be interrupted. The drop in power supply voltage
It also occurs when starting the engine. In addition, the description shown in FIG.
The recording chart is a 12-minute recording chart, of which the running time is 5 minutes
This is shown in a 24-hour record chart.
Sometimes. In FIG. 6, A is t₁Car before time
B shows a state where the vehicle speed waveform is zero, and C shows a state where the vehicle speed waveform is zero.
t_TwoIndicates the vehicle speed after the time.

In order to solve this problem, a comparator or the like is provided in the digital operation recorder, and before the CPU is reset, the memory card is mounted on the operation recorder, but the power supply voltage drops. Is detected as a voltage waveform and stored, and then returned to its original state when the power supply voltage is restored. While the voltage is falling, the operation record on the memory card is lost, and as a result, there is a disadvantage that the time section where no operation is recorded is lost.

SUMMARY OF THE INVENTION The present invention has been made in consideration of the above-mentioned problems, and has as its object to provide a digital operation recorder capable of accurately recording the operation of a digital operation recorder on a memory card when the power supply voltage drops. The present invention provides a method for recording vehicle operation data using a vehicle.

[0006]

In order to achieve the above object, a method for recording vehicle operation data using a digital operation recorder according to the present invention is detachable from a digital operation recorder mounted on a vehicle. In recording the operation data of vehicle speed, mileage, and time on the recording medium set in
(1) For each set of recording media, a header indicating the start of a new operation is recorded on the recording medium, while information on whether the recording medium is set on the operation recorder is recorded on the operation recorder, and the recording medium is A first step of storing, in the operation recorder, a unique number provided on the recording medium in advance when set, and (2) recording a header indicating the start of recording operation data separately from the header on the recording medium. (2) when the power supply voltage of the operation recorder decreases during the operation data recording and the CPU of the operation recorder is reset, and thereafter, the power supply voltage is restored. A third step of recording a header indicating a new start of recording of operation data on a recording medium and then starting recording of operation data; and (4) at the start of the new recording, the recording medium When set on the line recorder, read the unique number of this recording medium and check if the read unique number is the same as the unique number of the recording medium set before resetting. And a fourth step of making a determination.

In the present invention, a header indicating the start of operation is recorded on the recording medium, a header indicating the start of recording of operation data is recorded, and the recording start time of the operation data, the operation start The recording end time of data and operation data is recorded, and a new header is recorded when the power supply voltage is restored,
Following the new header, the recording start time of the operation data, the operation data, and the recording end time of the operation data are recorded.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 shows a digital operation recording system. In FIG. 1, reference numeral 1 denotes a digital operation recorder, which is installed, for example, near the driver's seat of a truck 2 of a transportation company. Reference numeral 3 denotes a memory card (an example of a recording medium) composed of an IC card detachably mounted on the operation recorder 1. Reference numeral 4 denotes a card reader provided at a head office of a transportation company, for example.
For example, digital data recorded every 0.5 seconds is read. Reference numeral 5 denotes a personal computer connected to the card reader 4 by a signal line, for example, and a 24-hour recording chart is created based on the digital signal received from the card reader 4. Reference numeral 5a denotes a display unit of the personal computer 5, and 8 denotes a 24-hour record chart obtained from the printer 9. The operation recording device includes the operation recorder 1, the card reader 4, the personal computer 5, the printer 9, and the like.

FIG. 2 shows the principle of operation of the present invention. The crew sets the memory card 3 in the operation recorder 1, turns on the ignition key (IG.) Of the truck 2, and starts the engine (EG.). After that, the track 2 is moved to, for example, 5
A series of recording operations of the operation data (vehicle speed, traveling distance and time) on the memory card 3 when the truck 2 is stopped continuously and the ignition key (IG.) Is turned off after that is described. It is for.

FIG. 3 is a flowchart showing an example of a method for recording operation data. FIG. 4 is, for example, a 12-minute recording chart created by the personal computer 5, in which the upper part shows a change in vehicle speed and the lower part shows the mileage. From FIG.
The maximum speed is 120 km / h, the maximum continuous running time is 5 minutes,
It can be seen that the running distance is 5 km. FIG. 5 is a 24-hour record chart showing the change in the vehicle speed and the traveling distance in 24 hours.

First, a recording method for the memory card 3 according to the present invention will be described with reference to FIG. When the memory card 3 is set in the operation recorder 1, the memory card 3
The time when the memory card 3 was set while the header FF indicating the start of operation is recorded (IN time)
(See FIG. 2) is recorded. The header FF corresponds to the vehicle number (for example, the first car) of the truck 2 assigned to the crew. Further, information that the memory card 3 is set is recorded in the operation recorder 1, and a unique number previously provided in the memory card 3 when the memory card 3 is set in the operation recorder 1. Is also stored (read) in the operation recorder 1. This unique number is
This is, for example, a code number of the crew driving the truck 2.

Next, the ignition key (IG.) Is turned on.
Then, a header FE indicating the start of recording of operation data (vehicle speed, mileage, and time), which is a feature of the present invention, is recorded on the memory card 3,
Further, the ignition key (I
G. FIG. ) Is turned on, that is, the recording start time is recorded. That is, in the present invention, the recording of the header FE is performed in conjunction with the movement of the ignition key (IG.). When the ignition key (IG.) Is turned ON, the engine (EG. 3) Until the start time, three factors are recorded. In this case, when the engine (EG.) Starts, the memory card 3 records the engine (EG.) Start time, which is a feature of the present invention, that is, the recording end time. This is because when the engine starts, the power supply voltage of the operation recorder 1 drops and the memory card 3
Because no three elements are recorded.

As described above, the three elements are stored in the memory card 3 every 0.5 seconds between the recording start time (ignition key ON time) and the recording end time (engine start time).
Recorded and updated.

When the power supply voltage drops when the engine (EG.) Is started, the CPU of the operation recorder 1 is reset and the three elements are not recorded in the memory card 3 until the power supply voltage is restored. Therefore, according to the present invention, the recording chart is not created as in the conventional vehicle speed waveform B, and the data from the time when the power supply voltage is reduced to the time when the power supply voltage is restored remains interrupted. Appears.

Thereafter, when the power supply voltage returns, that is,
When the power is turned on, a new header FE indicating the start of recording is recorded in the memory card 3, and a return time, that is, a recording start time, which is a feature of the present invention, is recorded. That is, the three elements are recorded on the memory card 3 every 0.5 seconds from the return time, and are recorded until the ignition key (IG.) Is turned off. In this case, the time when the ignition key (IG.), Which is a feature of the present invention, is turned off, that is, the recording end time, is recorded on the memory card 3. This is because the new header FE contains an ignition key (I
G. FIG. ) Is turned off, the recording is performed in conjunction with the movement of the ignition key (IG.) So that the recording is completed.

As described above, three elements are recorded and updated in the memory card 3 every 0.5 seconds between the recording start time (return time) and the recording end time (ignition key OFF time).

In short, according to the present invention, the header F
E, the recording of a new header FE is performed in conjunction with the movement of an ignition key (IG.).
That is, in the present invention, the ignition key (IG.)
Is configured to start recording of three elements when is turned on,
In addition, the recording start time is recorded on the memory card 3, and the recording is terminated when the ignition key (IG.) Is turned off, and the recording end time is recorded on the memory card 3. The engine (E
G. FIG. ) Considering that the power supply voltage drops at the time of starting, this power supply voltage drop is considered to be the same as the OFF state of the ignition key (IG.), And the engine (EG.) Start time is stored in the memory as the recording end time. Record on card 3.
Further, in the present invention, the recovery time at which the power supply voltage has recovered is also recorded on the memory card 3 as the recording start time.

Therefore, the data between the power supply voltage drop and the power supply voltage recovery is discarded, and the three element recording data after the power supply voltage recovery is replaced with the three element recording data before the power supply voltage reduction by the new header FE. Can be clearly distinguished from data. As a result, an inaccurate operation record, which has been conventionally performed, is not put on the record chart.

Next, a recording method after the return of the power supply voltage will be described with reference to FIG. When the power supply voltage is restored after the power supply voltage is lowered (see step 100), that is, when the power supply is turned on (see step 101), the new header F indicating the start of recording is stored in the memory card.
E is recorded in step 107, preceded by the following steps. This is because the power supply voltage drops at the start of the engine (EG.), The CPU of the operation recorder 1 is reset, and the three elements are not recorded on the memory card until the power supply voltage returns. This is because the state of the memory card before the start of the engine (EG.) Is not known.

In FIG. 3, after the power supply voltage is restored in step 101, if the memory card is still set in the operation recorder in step 102, the process proceeds to step 103. Here, when the crew changes to a truck having a different vehicle number, such as the first car to the third car, and starts new recording of three elements (see step 104), the operation recorder of the first car even after the power supply voltage is restored. Is selected when the memory card is capable of recording three-element recording data while still being set. In the latter case, in order to verify the number of the memory card, this number is read by an operation recorder mounted on the first car (see step 105). As a result, before the engine (EG.) Is started in step 106 If the number is the same as the number of the memory card set in step 100, the new header FE indicating the start of recording is recorded on this memory card (see step 107), and recording of the three elements is continued (step 107). See step 108).

On the other hand, if it is determined in step 106 that the memory card is of a different number, that is, if it is a memory card used in another vehicle instead of the first car, switch to the another vehicle and newly record three elements. At the start, a header FF indicating the start of the operation is recorded on the memory card (see step 104), and subsequently, step 109
Then, a header FE indicating the start of recording is recorded on the memory card, and recording of three elements is started.

[0022]

As described above, according to the present invention, a header indicating the start of operation is recorded on a memory card, and subsequently,
A header indicating the start of recording of operation data is recorded.Following this header, the recording start time of operation data, operation data and the recording end time of operation data are recorded, and when the power supply voltage is restored, a new header is recorded. Is recorded, and the recording start time of the operation data, the operation data and the recording end time of the operation data are recorded after the new header, so that the data is recorded on the memory card while the power supply voltage is low. It is possible to avoid the inconvenience that there is no unexisted time section, and to accurately record the operation of the digital operation recorder on the memory card when the power supply voltage drops.

[Brief description of the drawings]

FIG. 1 is an overall configuration explanatory diagram showing an operation recording device used in an embodiment of the present invention.

FIG. 2 is a diagram for explaining an operation principle in the embodiment.

FIG. 3 is a flowchart showing the embodiment.

FIG. 4 is a diagram showing a 12-minute recording chart created by a personal computer in the embodiment.

FIG. 5 is a diagram showing a 24-hour recording chart created by a personal computer in the embodiment.

FIG. 6 is a diagram showing a conventional problem.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Digital operation recorder, 2 ... Vehicle, 3 ... Memory card (recording medium), 4 ... Card reader, 5 ... Personal computer, FF ... Header showing start of operation
FE: Header indicating the start of recording of operation data.

Continued on the front page F term (reference) 2F070 AA04 BB01 CC04 CC06 CC11 DD15 FF06 FF12 GG07 GG08 GG09 3E038 AA01 AA07 BA01 BA12 BB04 CA05 CA06 CA07 CB02 CB05 GA01 HA04 9A001 BB06 JJ77 LL09

Claims (3)

[Claims] When recording operation data such as vehicle speed, mileage and time on a recording medium which is detachably set on a digital operation recorder mounted on a vehicle, (1) a new recording medium is set for each recording medium set. While recording the header indicating the start of the operation on the recording medium, the information on whether the recording medium is set on the operation recorder is recorded on the operation recorder, and when the recording medium is set, it is provided on the recording medium in advance. A first step of also storing the unique number assigned to the operation recorder, and (2) a step of recording the operation data after recording a header indicating the start of recording of operation data separately from the header on a recording medium. Step 2 and (3) When the power supply voltage of the operation recorder decreases during the operation data recording, the operation recorder C
A third step of, when the PU is reset and thereafter the power supply voltage is restored, recording a header indicating a new start of recording of operation data on a recording medium and then starting recording of operation data; When the recording medium is set in the operation recorder at the start of a proper recording, the unique number of this recording medium is read, and the unique number read is the unique number of the recording medium that was set before resetting. A method for recording operation data of a vehicle using a digital operation recorder, comprising a fourth step of determining whether or not the number is the same as the number. 2. A method for recording operation data of a vehicle using a digital operation recorder according to claim 1, wherein the header indicating the start of operation corresponds to the vehicle number, and the unique number indicates a crew code. . 3. A method for recording operation data of a vehicle using a digital operation recorder according to claim 1, wherein the method returns to the first step when it is determined in the fourth step that the determination is negative. .