JP2836099B2 - Digital instrument - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a digital instrument.

[Prior Art] Conventionally, there are various digital instruments, one of which is a digital tachograph. In this digital tachograph, these data are recorded while being sequentially sampled. As a storage medium for this data, a storage medium that can be inserted into and removed from the digital tachograph body, that is, a memory cassette, a memory cartridge, a memory card, an IC card, or the like has been considered.

In addition, since the content to be recorded is an electronic device such as a memory card as a storage medium, not only vehicle speed data but also operation management data can be recorded, and a function of an operation recorder is added in addition to a conventional tachograph function. It has become. When the vehicle is used as an operation recorder, the driver presses an operation switch when leaving and returning the vehicle, and the time at that time is set as the operation start and operation end time.

[Problems to be Solved by the Invention] However, when used as an operation recorder, there is a problem that if the driver is busy, the driver forgets to press the operation switch.

An object of the present invention is to provide a digital tachograph capable of preventing operation forgetting of an operation switch and reliably acquiring operation data when a digital instrument is used as an operation recorder.

[Means for Solving the Problems] As shown in FIG. 1, the first invention is mounted on a vehicle, samples vehicle speed data from a vehicle speed detecting means M1 at predetermined time intervals, and calculates a change in vehicle speed. In a digital instrument that stores digital values, a storage medium M2 that can be inserted into and removed from the digital instrument main body, an initialization determination unit M3 that determines whether the storage medium M2 has been initialized, and a time that detects the current time. Detection means M4
The initialization determination means M3 determines that the storage medium M2 has been initialized, and the vehicle speed detection means
When the stop of the vehicle is detected by M1, and when the ignition switch M5 is turned on, a digital instrument comprising control means M6 for storing the current time by the time detecting means M4 as the operation start time in the storage medium M2 is provided. This is the gist.

Further, as shown in FIG. 2, the second invention is a digital instrument which is mounted on a vehicle, samples vehicle speed data from vehicle speed detecting means at predetermined time intervals, and stores a transition of the vehicle speed as a digital value. A storage medium M7 that can be inserted into and removed from the digital instrument main body, a lock mechanism M8 that prevents the storage medium M7 from dropping from the digital instrument main body, a lock state detection unit M9 that detects a lock state of the lock mechanism M8, A time detecting means M10 for detecting the time of the time, and when the ignition switch M11 is off and the lock state detecting means M9 detects that the lock mechanism M8 has been unlocked, the time detecting means M10 And a control means M12 for storing the current time of the vehicle as the operation end time in the storage medium M7.

[Operation] In the first invention, the initialization determining means M3 determines that the storage medium M2 has been initialized, and the vehicle speed detecting means.
When the stop of the vehicle is detected by M1 and the ignition switch M5 is turned on, the control means M6 controls the time detection means M4.
Is stored in the storage medium M2 as the operation start time.

Further, in the second invention, the ignition switch M11 is turned off, and the lock mechanism M8 is detected by the lock state detecting means M9.
When the control unit M12 detects that the lock has been unlocked, the control unit M12 stores the current time of the time detection unit M10 in the storage medium M7 as the operation end time.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

FIG. 4 shows a digital tachograph 1 as an example of a digital instrument according to the present invention. A card insertion slot 3 is formed in the front of a digital tachograph main body 2 formed in a box shape. A lock pin 4 as a lock mechanism is rotatably arranged in the card insertion slot 3, and the lock pin 4 is set in a horizontal state shown by a dashed line in FIG. 4 to insert and remove a memory card 5 as a storage medium. By setting the lock pin 4 to a vertical state shown by a solid line in FIG. 4, the memory card 5 can be prevented from being removed. Further, a lock switch 6 as lock state detecting means is provided in the digital tachograph main body 2 at the support shaft portion of the lock pin 4, and the switch 6 is set when the lock pin 4 is set in a vertical state (lock state). Outputs ON signal.

Various operation switches 7a to 7f are arranged on the front of the digital tachograph main body 2, and data such as start / end of operation can be input by operating the operation switches 7a to 7f. A display device 8 is provided on the front surface of the digital tachograph main body 2, and the display device 8 displays data such as time and vehicle speed. Digital tachograph body 2
A green LED 9 and a red LED 10 are arranged in the center of the front of the camera.

FIG. 5 shows the electrical configuration of the digital tachograph 1. A microcomputer serving as an initialization determining unit, a time detecting unit, and a controlling unit;
The microcomputer 11 includes a vehicle speed detector as a vehicle speed detecting means via an interface 12.
13 is connected. The microcomputer 11 performs a time operation with a pulse signal from the oscillation circuit 14, displays the time on the display device 8, and samples the detection signal from the vehicle speed detector 13 at predetermined time intervals to obtain the vehicle speed. I have.

A card writing / reading buffer 15 is connected to the microcomputer 11, and the buffer 15
It is possible to write data (digital value) indicating a change in the vehicle speed and read the written data. The microcomputer 11 turns on the green LED 9 when writing data to the memory card 5, and when the storage capacity of the memory card 5 becomes low,
Turn on the red LED 10.

The microcomputer 11 inputs an ON / OFF signal of an ignition switch 17 via an interface 16, and the microcomputer 11 inputs signals from the operation switches 7a to 7f. Microcomputer 11 interface
A constant-voltage power supply is input from an external power supply device 19 via 18. Further, the lock switch 6 is connected to the microcomputer 11 and inputs a signal indicating the lock state of the lock pin 4.

Next, the operation of the digital tachograph thus configured will be described.

First, before the operation starts, a driver holding the initialized memory card 5 gets on the vehicle, sets the lock pin 4 in a horizontal state, inserts the memory card 5 from the card insertion slot 3, and sets the lock pin 4 in a vertical state. To lock. And
From this state, the driver turns on the ignition switch to start the engine, starts operation, and goes out of the garage to the destination.

FIG. 3 shows processing of the microcomputer 11 performed at predetermined time intervals by operating a power-on switch (not shown).

First, the microcomputer 11 determines whether or not the ignition switch 17 is on in step 101, and if the ignition switch 17 is on, determines in step 102 whether or not the memory card 5 is inserted. When the memory card 5 is inserted in step 102, the microcomputer 11 determines whether or not the lock switch 6 is turned on in step 103 and the lock pin 4 is locked. It is determined whether or not 5 has been initialized.

If the memory card 5 has been initialized in step 104, the microcomputer 11 determines in step 105 whether the vehicle speed is zero. If the vehicle speed is zero, the microcomputer 11 reads the time at that time in step 106. Then, the microcomputer 11 records the time on the memory card 5 as the operation start time in step 107.

During the subsequent traveling, the microcomputer 11 sequentially samples the traveling data, and
To record. During the operation of the tachograph at the time of traveling, the lock pin 4 is in the vertical state, so that the card insertion slot 3 is closed and the memory card 5 does not fall off.

Then, the operation of the vehicle is completed and the vehicle returns to the garage again to stop the vehicle. FIG. 6 shows the processing of the microcomputer 11 at this time.

First, the microcomputer 11 determines whether or not the ignition switch 17 is turned off in step 200, and if it is turned off, determines in step 201 whether or not the lock switch 6 is turned off. When the lock switch 6 is turned off and the lock of the lock pin 4 is released, the microcomputer 11 reads the time at step 202 and records it on the memory card 5 as the return time at step 203.

As described above, in this embodiment, the removable memory card 5 (storage medium) is provided in the digital tachograph main body 2, the memory card 5 is initialized by the microcomputer 11, the vehicle is stopped, and the ignition is stopped. When the switch 17 is turned on, the current time is stored in the memory card 5 as the operation start time.
Therefore, even if the occupant forgets to press the operation switch at the start of the operation, the operation data can be reliably acquired.

Also, a memory card 5 (storage medium) is provided by a lock pin 4.
Is prevented from falling off from the digital tachograph body 2, the lock state of the lock pin 4 is detected by the lock switch 6, the ignition switch 17 is turned off by the microcomputer 11, and the lock of the lock pin 4 is released. When the operation is performed, the current time is stored in the memory card 5 as the operation end time.
Therefore, even if the occupant forgets to press the operation switch at the end of the operation, the operation data can be reliably acquired.

Note that the present invention is not limited to the above-described embodiment. For example, the storage medium may be a memory cartridge, a memory cassette, an IC card, or the like in addition to the memory card.

[Effects of the Invention] As described in detail above, according to the present invention, when a digital instrument is used as an operation recorder, it is possible to prevent the operation switches from being forgotten to be operated and to reliably acquire operation data. Demonstrate.

[Brief description of the drawings]

1 is a claim correspondence diagram, FIG. 2 is a claim correspondence diagram, FIG. 3 is a flowchart of a digital tachograph of the present embodiment, FIG. 4 is a perspective view of the digital tachograph, FIG. 5 is an electric circuit diagram of the digital tachograph, FIG. 6 is a flowchart. 2 is a digital tachograph main body, 4 is a lock pin as a lock mechanism, 6 is a lock switch as lock state detecting means, 11 is a microcomputer as initialization determining means, time detecting means and control means, and 13 is a vehicle speed detecting means. The vehicle speed detector, 5 is a memory card as a storage medium, and 17 is an ignition switch.

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Shinichi Hori 1-1-1, Showa-cho, Kariya-shi, Aichi Japan Inside Denso Corporation (72) Inventor Mitsuhiko Yamada 1-1-1, Showa-cho, Kariya-shi, Aichi Japan Denso Corporation (72) Inventor Yukihiko Noda 1-1-1 Showa-cho, Kariya-shi, Aichi Japan Inside Denso Co., Ltd. (56) References JP-A-63-255663 (JP, A) JP-A-61-273690 (JP, A) 1-76659 (JP, U) 60-192059 (JP, U) JP 58-4390 (JP, B2) (58) Fields investigated (Int. Cl. ⁶ , DB name) G01P 1/16 G07C 5/00-5/12

Claims (2)

(57) [Claims] A digital instrument mounted on a vehicle, which samples vehicle speed data from a vehicle speed detecting means at predetermined time intervals and stores a change in vehicle speed as a digital value. An initialization determination unit that determines whether the storage medium has been initialized; a time detection unit that detects a current time; and the initialization determination unit determines that the storage medium has been initialized. And control means for storing the current time of the time detecting means in the storage medium as the operation start time when the vehicle speed is detected by the vehicle speed detecting means and the ignition switch is turned on. Digital instrument characterized by the following. 2. A digital instrument mounted on a vehicle, which samples vehicle speed data from a vehicle speed detecting means at predetermined time intervals and stores a transition of the vehicle speed as a digital value. A lock mechanism for preventing the storage medium from dropping from the digital instrument main body, a lock state detection means for detecting a lock state of the lock mechanism, a time detection means for detecting a current time, and an ignition switch being off, And control means for, when the lock state detecting means detects that the lock mechanism is unlocked, storing a current time by the time detecting means as an operation end time in the storage medium. A digital instrument characterized by that: