JPH0648498B2 - Data recording device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a data recording device, particularly an unmanned observatory,
The present invention relates to a data recording device suitable for continuously collecting and recording long-term observation data at regular intervals.

(B) Conventional technology In general, in the case of continuously collecting and recording measurement data at predetermined time intervals over a long period of time, one or one set of recording media set in the data recording device should cover the entire period. However, the recording medium must be replaced several times during the measurement period.

Therefore, in the past, when a staff member came to replace the recording medium, he went to the observation site and replaced the recording medium. Of course, it is not necessary to lose the temporal continuity of the measurement data even during replacement, so a set of two recording media is provided, and the data is recorded in order from the first storage area of the first storage medium. , This first
When the second storage medium is full, data is recorded from the first storage area of the second storage medium, and the first storage medium is replaced with a new one during this period. Then, when the second storage medium becomes full, data is recorded again from the first first storage area, and the second storage medium is replaced during this period.

(C) Problems to be Solved by the Invention Like the above-mentioned conventional data recording apparatus, a method of using a pair of recording media and alternating the first and second recording media is Frequent replacement. Usually, the observatory where the data recording device is installed is often in a distant place,
Frequent replacement requires a lot of work, and it is better to replace it less frequently if possible.

Also, if there is a power outage during the measurement period, it is unavoidable that data will be lost during the power outage, but at least the data recorded before the power outage will not be destroyed, and data collection will continue smoothly after the power is restored. It is desirable to be able to.

In view of the above, the present invention, even when continuously collecting and recording data over a long period of time, the frequency of replacement of the recording medium is low, and a power failure occurs during the measurement period, and the data before the power failure is destroyed after the power failure is restored. It is an object of the present invention to provide a data recording device that can continue recording data without doing so.

(D) Means for Solving Problems The data recording apparatus of the present invention has a predetermined time T after the power is turned on.
_{When the} start command is input within 1, the first and second initialization signals are output, while when the start command is input after the elapse of a predetermined time T ₁ after the power is turned on, only the second initialization signal is output. Is output and a start command is input within a predetermined time T ₁ after the power is turned on, or a processing request signal is received every time a predetermined time T _{2 has} passed from the earlier time after the predetermined time T _{1 has} passed after the power is turned on. A time lapse monitoring device (4) for outputting
When the storage data of the first and second counters (6, 7), the first storage means (5) including the data storage area (8) and the data storage area become full, the data transfer is performed. When the first initialization signal is present, the first address of the data storage area is set in the first counter every time the second storage means (9, 10) for storing the data and the processing request signal are received. If the second initialization signal is present, the start address of the second storage means is set in the second counter, and each time the processing request signal is received, the first counter in the data storage area is set. Data is sequentially stored in the address corresponding to the contents of
Control means (ST1 to ST
8), it is determined whether or not the data in the data storage area has become full, and the data in the data storage area is transferred to the second storage means by a determination output of fullness, and the second Second control means (ST9, ST12) for incrementing the counter by the amount corresponding to the transfer amount and for resetting the first address of the data storage area in the first counter, and stored in the second storage means. And a third control means (ST13, ST14) for resetting the head address of the second storage means to the second counter by the determination output of fullness. Has been done.

(F) Action In this data recording device, when the start command is input within T ₁ time after the power is turned on, the time monitoring device outputs the first and second initialization signals, and the start command After the input, the processing request signal is output every time T ₂ has elapsed. Upon receiving this processing request signal, the first control means sets the first address of the data storage area in the first counter in the presence of the first initialization signal and the second initialization signal, and then the second counter. Is set to the start address of the second storage means. Then, each time the processing request signal is input, the fetched data is sequentially stored in the address of the data storage area designated by the first counter, and the first counter is incremented. The second control means determines whether or not the data in the data storage area is full, and when full, transfers the data in the data storage area to the second storage means and the second counter. The number of steps is incremented by the amount, and the first address of the data storage area is reset in the first counter. The third control means determines whether or not the second storage means is full, and if the second storage means is full, sets the start address of the second storage means in the second counter.

When a start command is input after a lapse of T ₁ hours after the power is turned on, only the second initialization signal is output from the time monitoring device, and processing is performed every time a T ₂ time elapses after the T ₁ hour has elapsed. A request signal is output. Upon receiving this processing request signal, the first control means confirms only the second initialization signal, and thereby sets the head address of the second storage means in the second counter. Therefore, in this case, the first address of the data storage area is not set in the first counter. Then, each time a processing request signal is input thereafter, the fetched data is sequentially stored in the address of the data storage area designated by the first counter, and the first counter is incremented. Subsequent operations of the second control means and the third control means are the same as when the start command is input within T ₁ time after the power is turned on.

(F) Examples Hereinafter, the present invention will be described in more detail with reference to Examples.

FIG. 1 is a block diagram of a weight measuring device showing an embodiment of the present invention.

In the figure, the measuring device 1 is a gravimeter, which detects the gravity at the observation location in an analog manner, converts it into a digital value by the data input device 2, and takes it in by the control device 3.

The control device 3 includes a microprocessor and the like, and
It is configured to execute the processing of the flowchart shown in the figure.

In the time monitoring device 4, when the start switch 12 is turned on within T ₁ hours after the power switch 11 is turned on,
When the initialization signal 1 and the initialization signal 2 are turned on, and when the start switch 12 is pressed after a lapse of T ₁ time after the power switch 11 is turned on, only the initialization signal 2 is turned on. The initialization signal 1 and the initialization signal 2 are input to the control device 3. Further, the time monitoring device 4 applies the processing request signal to the control device 3 every T ₂ hours after the time T ₁ has passed after the power switch 11 is turned on or when the start switch 12 is turned on. It has become. Further, when the time monitoring device 4 receives the processing end signal from the control device 3, the time monitoring device 4 turns off the initialization signal 1 and the initialization signal 3.

On the other hand, when the control device 3 receives the processing request signal from the time monitoring device 4, the control device 3 sequentially executes the processing of the flowchart shown in FIG.

The storage device 5 is composed of a non-volatile memory, and has a counter 16, a counter II 7, and a data storage area 8 inside.

The counter 16 stores the address of the data storage area when writing data to the data storage area 8, and the counter II7 is a counter for storing the address of writing data to the memory cassette 10 described later. The data recording device 9 stores the data stored in the data storage area of the storage device 5 according to a command from the control device 3 in the memory cassette 1.
The data is transferred to the address indicated by the counter II7 of 0.

The memory cassette 10 is also a non-volatile memory, has a larger capacity than the data storage area 8, and is configured to be attached to the data recording device 9.

Next, the operation of the above-described weight measuring device will be described with reference to the flowchart shown in FIG. 2 and the waveform diagram shown in FIG.

When the power switch 11 is turned on, the time monitoring device 4 becomes T
Start monitoring for ₁ hour. When you start observing gravity,
The measurer turns on the power switch 11 and immediately turns on the start switch 12 within a lapse of T ₁ time. As a result, the time monitoring device 4 turns on the initialization signal 1 and the initialization signal 2, and then starts monitoring the T ₂ time.

According to FIG. 3, the power switch 11 is turned on at a mark point Δ on the left end of the drawing, and the start switch 12 is turned on as indicated by a triangle mark within T ₁ time from this point. Accordingly, the initialization signal 1 and the initialization signal 2 are turned on, and thereafter, when T ₂ time elapses from the time when the start switch 12 of ▲ is turned on, the time monitoring device 4 causes the control device 3 to operate. The processing request signal is output to the controller 3, the control device 3 starts to operate, and the initialization signal 1 and the initialization signal 2 are turned off when the processing of the processing request signal is completed.

The control device 3 stays at step ST1 shown in FIG. 2 and waits for the processing request signal to be sent until it receives the processing request signal from the time monitoring device 4. Upon receiving the processing request signal from the time monitoring device 4, the control device 3 subsequently takes in the initialization signal 2 (ST2) and first determines whether or not the initialization signal 1 is 1 (ST3).

As described above, after the power switch 11 is turned on, when the start switch 12 is turned on within the lapse of T ₁ time, both the initialization signal 1 and the initialization signal 2 are turned on. "Initialization signal 1 =
The result is YES, and the start address of the data storage area is set in the counter 16 (ST4). Subsequently, in step ST5, it is determined whether the initialization signal 2 is 1 or not. Is also YES, and subsequently, in step ST6, the leading address of the memory cassette 10 is set in the counter II7.

As a result, the start address of the data storage area 8 and the start address of the memory cassette 10 are set in the counter 16 and the counter II 7, respectively. Then, the control device 3 first stores the observation data taken in via the data input device 2 in the data storage area 8 addressed by the counter 16. In this case, since the start address of the data storage area 8 is set in the counter 16,
The measurement data is stored at the beginning of the data storage area 8 by the length of the measurement data (ST7).

Next, the content of the counter 16 is counted up by a value corresponding to the data previously stored in the data storage 0 area 8 (ST8). Then, it is next determined whether or not the storage contents of the data storage area 8 are full (ST9). In this determination, it is determined whether or not the content of the counter 16 exceeds a value obtained by subtracting the length of one measurement data from the size of the data storage area 8. If it exceeds, it is determined that the counter 16 is full. . First first
In the case of the data storage for the second time, it can be considered that the data storage area is not full, so this determination is NO, and the process returns to step ST1 through "output a processing end signal" in step ST15.

The time monitoring device 4 which has received the termination processing signal from the control device 3
The initialization signal 1 and the initialization signal 2 are turned off. After that, the measurement is continued, and when the time T ₁ elapses, the time monitoring device 4 sends the processing request signal to the control device 3 again. In response to this, similarly to the previous time, the control device 3 takes in the initialization signal 1 and the initialization signal, and the initialization signal 1 and the initialization signal 2 become 1
Whether or not it is step ST3 and step ST, respectively.
However, since both the initialization signal 1 and the initialization signal 2 have already been turned off by the previous processing end signal, the determination in these steps ST3 and ST5 is N.
It becomes O, skips the processing of step ST4 and step ST6, respectively, and moves to step ST7. In other words, the contents of the counter 16 and the counter II7 are reset, and the start address is not reset respectively, and the process proceeds as it is. Then, the measurement data taken into the control device 3 through the data input device 2 is stored in the data storage area 8 in correspondence with the address stored in the counter 16. Also, the counter 16
A count-up corresponding to the area storing the measurement data is performed (ST8).

As described above, the measurement data is sequentially stored at each time T ₂ until the storage data is full in the data storage area 8. When the storage data in the data storage area 8 becomes full soon, the determination in step ST9 becomes YES, and subsequently, in step ST10, the measurement data stored in the data storage area 8 until then is stored in the memory via the data recording device 9. Transfer to cassette 10. In this case, since the start address of the memory cassette 10 is stored in the counter II7, the transferred measurement data is sequentially stored starting from the start address of the memory cassette 10. Then, the address corresponding to the transferred data amount is counted up by the counter II7 (ST1
1). Further, since all the data in the data storage area 8 is transferred to the memory cassette 10, the measurement data is newly stored in the data storage area 8 at the head address. The leading address of 8 is reset (ST12). Next, it is determined whether the memory cassette 10 is full (ST13). When the number of times the data in the data storage area 8 has been transferred to the memory cassette 10 is one, the memory cassette 10 is naturally not full, and this determination is NO, and in step ST15 a processing end signal is output and the control device The operation of 3 is also step S
It will return to T1.

The above process is repeated several times, that is, when the data in the data storage area 8 becomes full, the data is sequentially transferred to the memory cassette 10 through the data recording device 9, and when the data in the memory cassette 10 becomes full, step ST13.
Is YES, the counter II is returned in step ST14.
The contents of 7 are set in the head address of the memory cassette 10. Then, through step ST15 again, step S
Return to T1.

At this point, if the memory cassette 10 is replaced, it can be replaced without any trouble. That is, when the top address of the memory cassette 10 is set in the counter II7 and the memory cassette 10 is full,
Next, the memory cassette 10 may be replaced while sequentially storing the data in the data storage area 8.

For example, assuming that the data stored in the data storage area 8 starts to store data and becomes full, and the time required for transfer is 8 hours, the memory cassette 10 is filled at least within 8 hours. It is enough to replace 10.

Next, the operation when a power failure occurs during data measurement will be described.

As shown in the center part of FIG. 3, when a power failure occurs, the power is turned on again after the power is restored, the time monitoring device 4 starts monitoring for T ₁ hours. since the start switch 12 is not turned on in ₁ hour in a T, the time T ₁ has elapsed, the time monitoring device 4 that point further measures a T ₂ hours. Then, after the elapse of T ₂ time, the time monitoring device 4 outputs a processing request signal to the control device 3. The control device 3, as shown in the flowchart of FIG. 2, has steps ST3 and ST5.
Then, it is determined whether or not both the initialization signal 1 and the initialization signal 2 are 1, but in the case of recovery after a power failure, the initialization signal 1 and the initialization signal 2 are not turned on, The processes of ST4 and ST6 are skipped, that is, the counter 16 and the counter II7 are not updated, and the process directly proceeds to the measurement data acquisition process of step ST7. Therefore, thereafter, each time a processing request signal is input, the data taken in from the data input device 2 is stored in the data storage area 8 at the address stored in the counter 16 at the time of power failure, and thereafter, the data is sequentially stored from that address. The memory cassette 10 is stored in the same manner. The memory cassette 10 is also stored in the area indicated by the counter II7. That is, the data during the power failure will be lost, but the subsequent data will be stored in the data storage area 8 and the memory cassette 10 as they are.

Further, in the apparatus of this embodiment, even if the memory cassette 10 is replaced before it is full, by pressing the start switch 12, the following data is transferred to the new memory cassette 1.
Writing is possible from the leading address of 0.

As shown in the waveform on the right side of FIG. 3, the power switch 11
When the start switch 12 is turned on after a considerable period of time T ₁ or more has elapsed after the switch has been turned on (marked by ▲ on the right side of FIG. 3), this causes only the initialization signal 2 to be output from the time monitoring device 4. Is generated. Therefore, when the processing request signal is input to the control device 3 from the time monitoring device 4 and the control device 3 starts to operate, the initialization signal 1 and the initialization signal 2 are taken in at step ST2 of FIG. Since the initialization signal 1 of 1 is NO and it is NO, step ST4 is skipped, but the initialization signal 2 of step ST5 is
If YES, the determination is YES, and the leading address of the memory cassette 10 is set in the counter II7. Therefore, in step ST7, the measurement data is stored in the data storage area 8, the data is sequentially stored in the data storage area 8, and when the data in the data storage area 8 becomes full, the data in the data storage area 8 is stored in the memory cassette 10. It will be transferred (ST10). Since the start address of the memory cassette 10 is set in the counter II7, this data is stored from the start area of the new memory cassette 10.

As described above, after the time T ₁ has elapsed after the power was turned on, the start switch 12 is turned on, so that the memory cassette 10 is stored from the beginning address. The memory cassette 10 can be exchanged immediately when it arrives at.

(F) Effect of the Invention According to the present invention, the frequency of replacement of the storage media is about half that of the conventional one in which two storage media are used alternately, so the device is installed far away. Even in this case, the labor and labor of the staff can be saved. In addition, when a power failure occurs and the system is restored, the storage area is automatically stored from the next area where data was stored until the time of power failure, so data before power failure is not destroyed by resetting, etc. Data can be recorded after a power failure.

[Brief description of drawings]

FIG. 1 is a block diagram of a gravity measuring device showing an embodiment of the present invention, FIG. 2 is a flow chart for explaining the operation of a control device of the device, and FIG. 3 is a flowchart for explaining the operation of the device. It is a signal time chart for doing. 3: Control device, 4: Time monitoring device, 5: Storage device, 6: Counter I, 7: Counter II, 8: Data storage area, 9: Data recording device, 10: Memory cassette, 11: Power switch, 12: Start switch.

Claims (1)

[Claims] _{1. When} a start command is input within a predetermined time T ₁ after the power is turned on, the first and second initialization signals are output, while the start command is issued after a predetermined time T ₁ after the power is turned on. is input, and outputs only the second initialization signal, and whether a start command to the predetermined time T ₁ after power is input, or any earlier after a predetermined time T ₁ elapses after power A time monitoring device that outputs a processing request signal each time a predetermined time T _{2 has} elapsed from the time point, first and second counters, and a first storage device including a data storage area.
Storage means, second storage means for storing and storing the data when the storage data in the data storage area is full, and a first initialization signal is present each time the processing request signal is received. If so, the first address of the data storage area is set in the first counter, and if the second initialization signal is present, the first address of the second storage means is set in the second counter. First control means for sequentially storing the fetched data at an address corresponding to the content of the first counter in the data storage area each time the processing request signal is received, and for incrementing the first counter, It is judged whether or not the data in the data storage area is full, and the data in the data storage area is transferred to the second storage means by a determination output of fullness, and the second counter is Second control means for incrementing by an amount corresponding to the sending amount and resetting the first address of the data storage area in the first counter, and whether the data stored in the second storage means is full Third, resetting the start address of the second storage means in the second counter with a full determination output
A data recording device consisting of the control means of and.