JP2005233662A - Measuring device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a measuring device capable of keeping continuity of time data, even when time change operation is performed independently of the start/stop operation state of data storage into a memory. <P>SOLUTION: This measuring device equipped with a time changing means and constituted so as to record and preserve measuring time data together with measurement data simultaneously in the memory is characterized by being provided with a memory state determination means for determining the operation state of the memory at the time changing time, and a time adjustment means for receiving a determination result during a data writing period into the memory by the memory state determination means, and performing time adjustment of the time difference between the present time and a time set by the time changing means based on a prescribed time correction resolution. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a measurement apparatus, and more particularly to improvement of time change in a measurement apparatus configured to simultaneously record and store time data measured together with measurement data in a memory.

Some measuring apparatuses have a clock function in order to simultaneously record and save measurement time data together with measurement data in a memory.
Patent Document 1 relates to a measuring device with a built-in clock, and discloses a technique for correcting the time of the built-in clock in synchronization with commercial alternating current.

  However, although Patent Document 1 is in common with the present invention in terms of a measuring device having a clock function, there is no description regarding a specific object, configuration, and effect of the present invention to improve inconvenience associated with time change. It is different from the invention.

JP 2000-292447 A

  FIG. 3 is a block diagram showing an example of a conventional measuring apparatus having a clock function. An input value such as a voltage is converted into measurement data of a digital value by the measurement unit 1. These measurement data are stored in the internal memory 3 together with the time data when measured from the memory start to the memory stop at a preset period via the control unit 2. The time data stored together with the measurement data is obtained from the time data RAM 4. Time data is sequentially written from the real-time clock unit 5 to the time data RAM 4.

  The measurement data stored in the internal memory 3 is stored in an external medium such as a magnetic disk, a semiconductor memory, or an optical disk in a predetermined file format via the control unit 2 when the memory is stopped after data storage is completed or at a preset cycle. 6 is transferred and saved.

  By the way, in such a configuration, the time data sequentially written from the real-time clock unit 5 to the time data RAM 4 depends on a reference frequency incorporated in each measuring device, so that the accuracy is generally relatively low. Misalignment is likely to occur. Therefore, the time setting unit 7 is operated at an arbitrary time point noticed by the user, and the contents of the time data RAM 4 are corrected and changed via the control unit 2.

  However, if the time change operation is performed regardless of the start / stop operation state of data storage in the memory, the time data stored in the time data RAM 4 is immediately changed.

  For this reason, if the measurement data is corrected so as to advance and delay the time during the memory start period in which the measurement data is stored in the internal memory 3 together with the time data, the time data may be stored in an overlapping state. On the other hand, if the correction is made so that the delay time is advanced, the time data may be stored in a state where it has been lost.

  If data is stored in the internal memory 3 in a state where duplication or omission occurs in these time data, the time continuity of the stored measurement data cannot be maintained.

  In order to ensure the time continuity of the measurement data stored together with the time data in the internal memory 3, for example, for the measurement data with overlapping time data, it is necessary not to temporarily store the data. For the time when data is missing, it is necessary to perform a process to supplement the measurement data.

  In addition, when there are a plurality of measurement value data files stored in the external medium 6, the time data is not continuous if the time is changed in the middle, and therefore these files cannot be combined into one file. .

  The problem to be solved by the present invention is a measurement capable of maintaining the continuity of time data even when the time change operation is performed regardless of the start / stop operation state of data storage in the memory. To implement the device.

In order to achieve such a problem, the invention according to claim 1 of the present invention is:
A measuring apparatus comprising a time changing means and configured to record and save measurement time data together with measurement data in a memory,
Memory state determination means for determining the operation state of the memory at the time change;
In response to the determination result during the data write period to the memory by the memory state determination means, a time adjustment means for adjusting the time difference between the current time and the set time by the time change means based on a predetermined time correction resolution;
Is provided.

  According to a second aspect of the present invention, in the measuring apparatus according to the first aspect, an SNTP client function is provided, and the time is set at a preset time period.

The invention according to claim 3 is the measuring apparatus according to claim 1 or 2, wherein
The time setting process is performed by the SNTP client function, and then data is written to the memory.

The invention of claim 4 is the measuring apparatus according to any one of claims 1 to 3,
A remote contact processing unit is provided, and time change processing is performed based on the remote contact signal.

The invention of claim 5 is the measuring apparatus according to any one of claims 1 to 4,
It is characterized in that the maximum value of the time lag for performing the time change process can be set arbitrarily.

The invention of claim 6 is the measuring apparatus according to any one of claims 1 to 5,
Means is provided for selecting and specifying whether or not to perform time change processing.

The invention of claim 7 is the measuring apparatus according to any one of claims 1 to 6,
Means is provided for displaying that the time change process is being executed.

The invention of claim 8 is the measuring apparatus according to any one of claims 1 to 7,
Means is provided for storing an execution history of the time change process.

  According to the present invention, when the time is changed during the memory start, the time data is gradually corrected over time based on the predetermined time correction resolution. This makes it possible to store measured data without temporarily storing data (removing data at the same time) or supplementing missing time data (eliminating lost time). Continuity can be maintained.

Hereinafter, the present invention will be described in detail with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of the present invention, and the same reference numerals are given to portions common to FIG.
An input value such as a voltage is converted into measurement data of a digital value by the measurement unit 1. These measurement data are stored in the internal memory 3 together with the time data when measured from the memory start to the memory stop at a preset period via the control unit 2.

  When the time setting unit 7 is operated to change the time, the memory state determination unit 8 determines the operation state (memory start / stop) of the internal memory 3 via the control unit 2.

  When the memory state determination unit 8 determines that it is during the memory start period during which data is written to the memory, the determination result is transmitted to the control unit 2. When the control unit 2 confirms the determination result that the memory start period is in progress, the time difference between the current time stored in the time data RAM 4 and the set time input from the time setting unit 7 is based on a predetermined time correction resolution. The time adjustment data value for adjusting the time gradually is calculated, and the calculation result is sequentially transferred and stored in the time adjustment data RAM 9.

  The time adjustment circuit 10 reads the time adjustment data from the time adjustment data RAM 9 when detecting a time signal output from the real-time clock unit 5 at a constant cycle interval, and performs the following predetermined time adjustment if necessary. Do.

  That is, in the time adjustment of the present invention, the time difference between the current time stored in the time data RAM 4 and the set time input from the time setting unit 7 is set to a predetermined time correction resolution, for example, 15.625 milliseconds (1 / 64 seconds), that is, in this case, the time difference of 1 second is gradually corrected over 64 seconds.

  The time data whose time is sequentially adjusted in this way by the time adjustment circuit 10 is transferred and stored in the time data RAM 4 via the control unit 2 and stored in the internal memory 3 together with the measurement data at that time.

  On the other hand, when the memory state determination unit 8 determines that it is during the memory stop period, the determination result is transmitted to the control unit 2. When the control unit 2 confirms the determination result that it is during the memory stop period, the time setting data value for gradually adjusting the time based on the predetermined time correction resolution as described above is not calculated, and the time setting unit 7 The time data set by is immediately transferred and stored in the time data RAM 4 as it is.

  Then, the control unit 2 transfers, stores and saves the data in the internal memory 3 to the external medium 6 in a predetermined file format when a memory stop or a preset cycle is reached.

  If the time setting is changed while the memory is starting, it is always necessary to adjust the time gradually based on the predetermined time correction resolution. If the time difference is large, it will take a considerable amount of time to complete. become. For example, if there is a deviation of 10 minutes, in the case of a time correction resolution of 15.625 milliseconds (1/64 seconds) per second, 600 * 64 = 3840 (seconds), which takes 1 hour or more. Therefore, if the time setting is changed while the memory is being written while the data is being written to the memory, the user can select whether to execute the operation of the present invention with the switch, or the time lag when the operation of the present invention is performed. May be set arbitrarily. Thereby, the user can arbitrarily set conditions for causing the operation of the present invention to be performed according to the application, and the time can be changed immediately as in the past.

  In addition, when the operation of the present invention is being executed, for example, the time display color is displayed on the display screen different from that during the normal operation, thereby prompting the user to note that the time data is being corrected. it can.

  Further, by recording the operation execution history of the present invention as one item of the operation history of the measuring device, it is possible to respond to the request for the operation history certification.

With this configuration, when the time is changed while the memory is starting, the memory operating state (memory start / stop) is determined. When the memory is starting, the time lag is gradually corrected with a predetermined time correction resolution. Since the time data is corrected, there is no need to temporarily store data (eliminate data at the same time) or to supplement missing time data (eliminate missing time). In addition, the continuity of measurement data can be maintained.
Further, when the time is changed while the memory is stopped, the time data is immediately changed as before, so that the time can be changed to the correct time immediately.

  FIG. 2 is a block diagram showing another embodiment of the present invention, and the same reference numerals are given to portions common to FIG. In the embodiment of FIG. 2, the SNTP (Simple Network Time Protocol) client function is implemented to enable time setting in a preset time period and to adjust the time by remote contact. Yes. Each of these time setting processes differs depending on the memory operation state.

  The SNTP request processing unit 11 issues a request to the SNTP client 12 to acquire time from an SNTP server (not shown) at a preset time interval. The SNTP client 12 accesses the SNTP server via the TCP / IP (Transmission Control Protocol / Internet Protocol) 13 and the network interface 14 of, for example, Ethernet (registered trademark).

  When the time can be normally acquired from the SNTP server, the control unit 2 determines the memory state by the memory state determination unit 8. When the memory is started, the time is gradually adjusted with a predetermined time correction resolution. When the memory is stopped, the time data is immediately changed.

  When there is a signal from the remote contact, the remote contact processing unit 15 determines whether it is a remote contact signal for changing the time or whether the time can be changed by the current remote contact. If the time can be changed, the time data is gradually corrected based on a predetermined time correction resolution for the time set and changed by the time setting unit 7 as described above.

  It is possible to start the memory after the time is immediately changed by the SNTP client 12 when the memory is started. As a result, the memory can be started after being matched with the current time, and the subsequent time error can be gradually changed with a predetermined time correction resolution by the SNTP client function.

  When the memory start is executed, the memory start process determination unit 16 determines whether or not to change the time when the memory is started. If the time is changed when the memory is started, the time is set by the SNTP client via the SNTP request processing unit 11. When the time setting is completed, the memory start process determination unit 16 requests the control unit 2 to perform a memory start operation.

  If time setting by the SNTP client function takes time, the memory may be started without waiting for the end of the time changing process.

As described above, according to the present invention, the following problems can be solved by determining the memory operation state (memory start / stop) and performing the time setting process.
If the time is changed while the memory is starting, the time data is gradually corrected over time with a predetermined time correction resolution, so that data is not temporarily stored (the data at the same time is lost). ) And the process of complementing the missing time data (to eliminate missing time), the time continuity of the measurement data can be maintained.

  In addition, by keeping the continuity of the measurement data even when the time is changed while the memory is starting, the user who is continuously collecting data without stopping the memory corrects the time error. However, it is now possible to refer to data collected by combining data from multiple files into one.

  If the time is changed while the memory is stopped, the time data can be changed immediately as before.

  Further, when the time is changed while the memory is started, if the time continuity of the measurement data in the internal memory is unnecessary, the time can be changed to the correct time immediately.

It is a block diagram which shows one Example of this invention. It is a block diagram which shows the other Example of this invention. It is a block diagram which shows a prior art example.

Explanation of symbols

1 Measurement unit 2 Control unit 3 Internal memory 4 Time data RAM
5 System Clock Generation Unit 6 Operation Unit 7 Time Setting Unit 8 Memory State Judgment Unit 9 Time Adjustment Data RAM
10 Time Adjustment Circuit 11 SNTP Request Processing Unit 12 SNTP Client 13 TCP / IP
14 Network interface 15 Remote contact processing unit 16 Memory start processing determination unit

Claims (8)

A measuring apparatus comprising a time changing means and configured to record and save measurement time data together with measurement data in a memory,
Memory state determination means for determining the operation state of the memory at the time change;
In response to the determination result during the data write period to the memory by the memory state determination means, a time adjustment means for adjusting the time difference between the current time and the set time by the time change means based on a predetermined time correction resolution;
A measuring apparatus characterized by comprising:   The measuring apparatus according to claim 1, wherein an SNTP client function is provided and the time is set at a preset time period.   3. The measuring apparatus according to claim 1, wherein after the time setting process is performed by the SNTP client function, data writing to the memory is started.   4. The measuring apparatus according to claim 1, wherein a remote contact processing unit is provided to perform time change processing based on a remote contact signal.   The measuring apparatus according to any one of claims 1 to 4, wherein a maximum value of a time lag for performing the time changing process can be arbitrarily set.   6. The measuring apparatus according to claim 1, further comprising means for selecting and specifying whether or not to perform time change processing.   7. A measuring apparatus according to claim 1, further comprising means for displaying that the time change process is being executed.   8. The measuring apparatus according to claim 1, further comprising means for storing an execution history of time change processing.

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