JP5034440B2 - Data recording device - Google Patents

Description

  The present invention relates to a data recording apparatus, and more particularly to an operation advance notice function in a data recording apparatus configured to transfer and store data recorded in the apparatus main body on a removable external storage medium.

  A data recording device is used to record measurement data at a large number of measurement points over a relatively long period of time, such as operation measurement of industrial equipment, environmental measurement, weather observation, and various experiments.

FIG. 4 is a block diagram showing an example of such a data recording apparatus. The input unit 1 receives measurement data of various physical quantities such as pressure, rotation speed, vibration frequency, frequency, temperature, humidity, rainfall, and wind speed measured by a sensor (not shown). The measurement data is input as a digital signal or an analog signal according to the sensor configuration. When measurement data is input as an analog signal , an A / D converter is provided in the input unit 1 to convert it into a digital signal.

  The measurement data converted into the digital signal is temporarily stored in the measurement cycle set in the data storage unit 2 provided inside the apparatus main body. For example, the measurement cycle can be set to the fastest 10 ms when capturing 10-channel measurement data, and can be set to the fastest 100 ms when capturing 60-channel measurement data. The data length per data is set to 4 bytes, and the data length of calculation data based on the measurement data is set to 6 bytes. The data transfer control unit 3 includes a rewritable external storage medium 5 such as a semiconductor memory card that is detachably attached to the external storage medium interface 4 before the measurement data stored in the data storage unit 2 is full. Control to transfer and store the data. As the data storage unit 2, for example, a memory configured as a ring buffer and storing data in a FIFO format is used.

  By the way, when the operator takes the measurement data of the data recording device installed at the measurement site back to the measurement room or the like and analyzes it with a personal computer, the operator attaches the external storage medium 5 to the external storage medium interface 4 as necessary. May be detached. If an operator pulls out the external storage medium 5 in an access state where data is transferred and stored in the external storage medium 5, the measurement data may be lost or the external storage medium 5 may be damaged. Since the data transfer control unit 3 determines the timing for executing data transfer storage from the storage unit 2 to the external storage medium 5 according to the number of data, the operator cannot know it.

  Therefore, the display unit 6 performs a display for surely notifying and recognizing the worker that the external storage medium 5 is being accessed in a state in which data is being transferred and stored in the external storage medium 5. The external storage medium 5 is prevented from being attached / detached / replaced by an operator while the external storage medium 5 is being accessed.

  The operation unit 7 sets various operating conditions in the data recording apparatus such as measurement channel designation and measurement data collection cycle setting.

  The arithmetic control unit 8 comprehensively controls each unit constituting the data recording apparatus.

  FIG. 5 is a diagram for explaining the operation of a conventional data recording apparatus. (A) shows the time relationship of data transfer from the data storage unit 2 to the external storage medium 5, and (B) shows the display operation of the display unit synchronized with the data transfer. The data transfer access timing is determined by the data transfer control unit 3 based on the amount of data stored in the data storage unit 2. For example, if the storage capacity of the data storage unit 2 is 5 megabytes, data transfer to the external storage medium 5 is instructed when the stored data exceeds 2 megabytes. A period indicated by hatching is an access period for transferring data from the data storage unit 2 to the external storage medium 5, and during this period, the external storage medium 5 must be removed and replaced.

  Therefore, the display unit performs “status display” as shown in (C) in the non-access period and (D) in the access period so that the worker can visually identify the non-access period and the access period. ) “Operation display” as shown in FIG. If the display unit 6 is a flat display element such as an LCD capable of dot-displaying multi-digit character / symbol information, the operator can be alerted with a variety of display forms, but the display function at the installation site is not emphasized. In some devices, as shown in FIG. 5, two digits of a 7-segment display element with a decimal point are sufficient. In (C) “Status display”, the number “00” is displayed. In (D) “Operation display”, the 7-segment display element 2-digit display pattern is set so that it can be switched to 4 patterns. Rotate like animation.

Patent Document 1 discloses a specific example of a data recording apparatus, but there is no description about safely attaching and detaching an external storage medium as in the present invention.
JP 2004-028583 A

  However, according to such a conventional configuration, it is understood from the display contents of the display unit 6 that the data cannot be extracted because the data is being transferred to the external storage medium 5 when the operator replaces the external storage medium 5. Although there is a problem, there is a problem that it is difficult to determine the timing of the extraction. When the exchange of the external storage medium 5 during data collection is permitted, if the data transfer access timing comes immediately after the external storage medium 5 is removed, the data transfer control unit 3 relates to the presence or absence of the external storage medium 5. Since the data stored in the data storage unit 2 is forcibly transferred, data loss occurs.

  The present invention solves such problems, and an object of the present invention is to realize a data recording apparatus that can prevent data loss due to extraction of an external storage medium.

The invention according to claim 1 for solving the above-mentioned problem is as follows.
In a data recording apparatus configured to transfer and store data recorded in a data storage unit of the apparatus main body to a removable external storage medium,
A stored data confirmation unit that outputs a data confirmation result signal when the amount of data stored in the data storage unit exceeds a predetermined amount;
A data transfer instruction unit that outputs to the data storage unit a data transfer instruction signal that instructs data transfer to the external storage medium in response to the data confirmation result signal;
Display means for displaying a notice as a notice period for a time required to attach / detach the external storage medium from when the data transfer instruction part receives the confirmation result signal until the data transfer instruction signal is output to the data storage part ;
Is provided.

The invention according to claim 2 is the data recording apparatus according to claim 1,
The display unit may be displayed in a different display form and the notice period access period for executing the stored data transfer to the external storage medium.

The invention according to claim 3 is the data recording apparatus according to claim 1 or 2, wherein
The display unit may be displayed in a different display form and the operation state of the apparatus body said notice period and the access period.

  According to a fourth aspect of the present invention, in the data recording apparatus according to any one of the first to third aspects, the display means is a segment display element with a decimal point.

  According to the data recording apparatus of the present invention, since it is possible to visually grasp and confirm that the access period for data transfer will start soon from the notice period display form of the display means, when trying to extract the external storage medium If the external storage medium is removed and the external storage medium is removed, it can be inserted immediately, and data loss due to removal of the external storage medium can be prevented.

Embodiments of the present invention will be described below with reference to the drawings.
The basic configuration of the data recording apparatus of the present invention is the same as the block diagram of the conventional example, but the data transfer control unit 3 in the data recording apparatus of the present invention is configured as shown in FIG. In FIG. 1, the data transfer control unit 3 of the present invention includes a storage data confirmation unit 31 that confirms the amount of data stored in the data storage unit 2, and a storage data confirmation unit 31 that is input via a delay circuit 32. A data transfer instruction unit 33 for instructing data transfer from the data storage unit 2 to the external storage medium 5 according to the confirmation result signal, and a predetermined display from the display content storage unit 34 according to the confirmation result signal of the stored data confirmation unit 31 It comprises a display content selection unit 35 for selecting the content.

  For example, if the storage capacity of the data storage unit 2 is 5 megabytes, the stored data confirmation unit 31 instructs the data transfer to the external storage medium 5 when the stored data exceeds 2 megabytes as in the conventional case. In the present invention, the display content selection is instructed so that the display device constituting the display unit 6 performs a predetermined display according to the transition of the data transfer operation.

  The confirmation result signal of the stored data confirmation unit 31 is input to the data transfer instruction unit 33 via the delay circuit 32 and also input to the display content selection unit 35 without passing through the delay circuit 32. The set delay time of the delay circuit 32 is a time required for attaching / detaching the external storage medium 5 and is, for example, about 10 seconds. If the time until the data transfer instruction unit 33 receives the confirmation result signal from the stored data confirmation unit 31 and outputs the data transfer instruction signal to the data storage unit 2 is substantially 10 seconds. In this case, the delay circuit 32 becomes unnecessary.

  Upon receiving the confirmation result signal from the stored data confirmation unit 31, the display content selection unit 35 starts a timer and selectively outputs “preliminary display 1” or “preliminary display 2” as display content to the display content storage unit 34. Display content selection signal for output. The display content storage unit 34 outputs a “status display” that displays a device number, a status, and the like as display contents during a period in which data transfer is not performed.

  When the timer counts the set delay time 10 seconds of the delay circuit 32, it is determined that the period has shifted to the data transfer access period, and “operation display” is output from “preliminary display 1” or “preliminary display 2” as display contents. When the timer counts a predetermined access period (for example, 10 seconds) necessary for the data transfer process, it is determined that the data transfer process is completed, and “status display” is output again as the display content.

  FIG. 2 is a diagram for explaining the operation of the configuration of FIG. (A) shows the time relationship of data transfer from the data storage unit 2 to the external storage medium 5, and (B) shows the display operation of the display unit synchronized with the data transfer. The data transfer access timing is determined by the data transfer control unit 3 based on the amount of data stored in the data storage unit 2. For example, if the storage capacity of the data storage unit 2 is 5 megabytes, data transfer to the external storage medium 5 is instructed when the stored data exceeds 2 megabytes. A period indicated by hatching is an access period for transferring data from the data storage unit 2 to the external storage medium 5, and during this period, the external storage medium 5 must be removed and replaced. A period indicated by dots preceding the access timing is a notice period, and until the data transfer instruction unit 33 receives the confirmation result signal from the stored data confirmation unit 31 and outputs the data transfer instruction signal to the data storage unit 2 as described above. It is set based on the time. In this embodiment, it is 10 seconds.

  In the non-access period, the display of the present embodiment displays “status display” as shown in (C) so that the worker can visually identify the three periods of the non-access period, the notice period, and the access period. In the access period, “operation display” as shown in (D) is performed, and in the notice period preceding the access period, “notice display 1” as shown in (E) or “notice” as shown in (F). Display 2 ”is performed.

  In (C) “Status display”, the number “00” is displayed. In (D) “Operation display”, the 7-segment display element 2-digit display pattern is set so that it can be switched to 4 patterns. Rotate like animation.

  In (E) “notice display 1”, the decimal point is blinked at a cycle of, for example, 500 ms so that the blinking and the passage of time are easily associated. In “Preliminary display 2” of (F), the preliminary notification period is counted down from 10 seconds to 1 second, for example. In order to improve the visibility of the operation, a turn-off time of 500 ms is inserted after the numerical display 500 ms and the next numerical value is displayed. Move to display. These notice displays are in a display form that avoids the influence on the “status display” as much as possible.

  By displaying the notice period preceding the access period in a display form different from the non-access period and the access period in this way, the operator can visually grasp and confirm that the access period for data transfer will start soon. If the external storage medium is to be extracted, it can be removed, and if the external storage medium is extracted, it can be inserted immediately, and data loss due to extraction of the external storage medium can be prevented.

  When the data recording apparatus of the present invention performs data collection in a single cycle, the access timing for transferring data to the external storage medium also has periodicity, and it is easy to predict the access timing. It can be said that the display has little utility. However, when there is no periodicity or when the periodicity is lost, the notice display functions effectively.

  The data recording apparatus of the present invention can also collect data at a plurality of cycles (referred to as multi-intervals). FIG. 3 is an explanatory diagram of the operation of such multi-interval driving, and shows an example of driving with two systems of period A and period B. FIG. In multi-interval driving, data is stored in the data storage unit 2 for each periodic system, so data transfer to the external storage medium 4 is also performed for each periodic system. As a result, access to the external storage medium 4 is performed irregularly and irregularly, and the access timings are unequal as shown in FIG. Even in such a case, the notice display of the present invention functions effectively.

  Specifically, in the notice periods A1, A2, and A3 in which the notice display period is sufficiently long, the notice display is performed by blinking the decimal point of the notice display 1, the notice display period is insufficient, and the access timing to the external storage medium 4 is set. In the impending notice period B1, by displaying the notice in the countdown of the notice display 2, the workable time for attaching / detaching the external storage medium 4 until the latest access timing can be accurately transmitted to the worker. .

  As described above, according to the present invention, it is possible to realize a data recording apparatus that can prevent data loss due to extraction of an external storage medium.

It is a block diagram which shows the Example of the data transfer control part 3 in the data recording device of this invention. It is operation | movement explanatory drawing of the structure of FIG. It is operation | movement explanatory drawing of multi-interval drive. It is a block diagram which shows an example of the conventional data recording device. It is operation | movement explanatory drawing of the conventional data recording device.

Explanation of symbols

3 Data transfer control unit 31 Stored data confirmation unit 32 Delay circuit 33 Data transfer instruction unit 34 Display content storage unit 35 Display content selection unit path

Claims (4)

In a data recording apparatus configured to transfer and store data recorded in a data storage unit of the apparatus main body to a removable external storage medium,
A stored data confirmation unit that outputs a data confirmation result signal when the amount of data stored in the data storage unit exceeds a predetermined amount;
A data transfer instruction unit that outputs to the data storage unit a data transfer instruction signal that instructs data transfer to the external storage medium in response to the data confirmation result signal;
Display means for displaying a notice as a notice period for a time required to attach / detach the external storage medium from when the data transfer instruction part receives the confirmation result signal until the data transfer instruction signal is output to the data storage part ;
A data recording apparatus comprising: The display means, the data recording apparatus according to claim 1, wherein the display in a different display form than the access period the notice period for executing the stored data transfer to the external storage medium. Said display means, said device data recording apparatus according to claim 1 or claim 2, wherein the display in different display forms and the notice period and the access time the operating state of the body.   4. The data recording apparatus according to claim 1, wherein the display means is a segment display element with a decimal point.

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