JP2009085896A - Measuring device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a measuring device which can obtain reproducibility of the measuring data, by limiting available measurement range so set as to be capable of using it for only the measuring range which is suitable to user's target. <P>SOLUTION: The measuring device having a plurality of measuring ranges has the means for limiting the available measuring range installed. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a measurement apparatus, and more particularly to improvement of range selection in a measurement apparatus having a plurality of measurement ranges.

  In general, measurement devices such as voltmeters, wattmeters, digital multimeters, and digital oscilloscopes have multiple selectable measurement ranges that are appropriate for the magnitude of the input measurement signal value and the measurement purpose. The measurement range is selected and measured.

  For example, in a measurement apparatus having a measurement range of 15-30-60-100-150-300-600-1000V, the operation when changing from the 30V range to the 600V range is as follows.

  When the UP key 1, the DOWN key 2, and the range display unit 3 are configured as shown in FIG. 6A, the UP key 1 is pressed five times while checking the display of the range display unit 3. When changing the measurement range on the menu screen 4 as shown in FIG. 6B, the rotary knob 6 is rotated while checking the range display on the menu screen 4 displayed after the RANGE key 5 is pressed. Select the 600V range, press the SET key 7 to confirm, and press the RESET key 8 to cancel the confirmation.

  In addition, an effective input range is set for each measurement range as shown in FIG. 7 (for example, 10 to 130% with respect to the measurement range). It will overlap across the range.

  Note that Patent Document 1 describes a measuring apparatus having an auto range function configured to automatically select a desired measurement range from a plurality of measurement ranges according to the magnitude of a measurement value and perform measurement. ing.

JP 2007-205891 A

  However, in these conventional measuring apparatuses, when the user selects and sets a desired measurement range, it is necessary to pass through a measurement range that is not required, resulting in poor work efficiency.

  In FIG. 7, when the measured value is about 15V as indicated by the hatched portion, measurement in each measurement range of 15-30-60-100V is possible, but since the measurement tolerance varies depending on the measurement range, If the measurement range is different, the measured value will be different, and the reproducibility of the measured value will not be obtained.

  The present invention focuses on such problems, and its purpose is to enable the use of only the measurement range that meets the user's purpose and to reproduce the measurement data by limiting the usable measurement range. An object of the present invention is to provide a measuring apparatus capable of obtaining the characteristics.

  The invention according to claim 1 which achieves such a problem is characterized in that in a measuring apparatus having a plurality of measuring ranges, means for limiting the usable measuring ranges is provided.

  The invention of claim 2 is characterized in that, in a measuring apparatus having a plurality of measuring ranges, means for automatically limiting the measuring ranges that can be used based on the usage history of the measuring ranges is provided.

  According to a third aspect of the present invention, in the measurement apparatus according to the first or second aspect of the present invention, an automatic range function for automatically selecting an appropriate measurement range from usable measurement ranges is provided.

  As a result, it is possible to realize a measuring apparatus that can use only a measurement range suitable for the user's purpose and can obtain reproducibility of measurement data by limiting the usable measurement range.

  Hereinafter, the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of a measuring apparatus according to the present invention. The analog measurement signal is adjusted to an appropriate input range value of the A / D converter 14 via the path of the input terminal 11 → input unit 12 → range switching unit 13, and then input to the A / D converter 14 for measurement. It is converted into a digital signal as data. The digital signal converted and output as measurement data from the A / D converter 14 is stored in the data memory 20 via the arithmetic processing unit 15, and is subjected to arithmetic processing as necessary, and the result of the arithmetic operation is also data. Stored in the memory 20. Further, the arithmetic processing unit 15 performs display processing for displaying the measurement result on the display unit 16, but a display processing unit may be provided separately.

  The measurement condition setting unit 21 sets the measurement conditions of each unit such as the input unit 12, the range switching unit 13, the arithmetic processing unit 15, and the display unit 16 to desired conditions according to the measurement purpose. For example, input filter conditions are set for the input unit 12 according to the characteristics of the measurement signal to be observed, and the range switching unit 13 is set to an initial mode in which all ranges can be used, or the range is limited based on the present invention. Set whether to set the mode, set the calculation conditions according to the measurement purpose for the calculation processing unit 15, and display a display screen that is easy to observe according to the characteristics of the measurement signal on the display unit 16. Set the display conditions for

  The range designation unit 17 designates at least one measurement range used by the user according to the measurement purpose in the range limited mode. At least one measurement range information specified by the user from the range specifying unit 17 is stored in the range memory 19 via the range control unit 18 together with, for example, user information and measurement information. In the range limited mode, the range switching unit 13 can use only the measurement range designated by the user based on the measurement range information stored in the range memory 19 based on the control signal input from the range control unit 18. To do.

  FIG. 2 is a flowchart for explaining the flow of the preprocessing operation for limiting the use range based on the present invention. First, it moves from the initial mode in which all ranges can be used to a mode for limiting the measurement range to be used (step S1). Subsequently, the measurement range to be used is selected (step S2). Then, the measurement range information selected in step S2 is stored in the range memory 19 (step S3). When using a plurality of measurement ranges, steps S2 and S3 are repeated. When all the measurement ranges to be used are selected, the range limiting mode for limiting the measurement range is exited (step S4). Thereby, when the range limited mode is set, only the measurement range stored in the range memory 19 can be used (step S5).

  In addition, when the range limitation mode is exited without selecting any specific measurement range in the range limitation mode, the initial mode in which all ranges can be used is restored. In addition, if you want to cancel the selected measurement range in the range-limited mode, you can cancel the measurement without reflecting the measurement range information stored in the range memory 19 by pressing a conventional cancel key such as the ESC key. You can exit the range limited mode.

  FIG. 3 is an explanatory diagram of an operation for limiting the measurement range used by the UP key 1 and the DOWN key 2, and the same reference numerals are given to portions common to FIG. 6. First, the range select key 31 is pressed in order to set the range limited mode for limiting the measurement range to be used. The measurement range to be used can be selected in the period from when the range select key 31 is pressed to the active state until the next time the range select key 31 is pressed to the off state. The fact that the Range Select key 31 is in an active state is indicated to the user by causing the Range Select key 31 to emit light, for example, as shown in FIG.

  While the range select key 31 is in an active state, the UP key 1 is pressed to display the 30V range to be used on the range display unit 3 as shown in (B), and the select key 32 is pressed to select. The user can recognize that the selection key 32 has been selected by displaying the “◯” mark 33 on the range display unit 3. Similarly, for the 600 V range, the UP key 1 is pressed to display 600 V on the range display unit 3 as shown in (C), and the Select key 32 is pressed to select. When the selection of the measurement range to be used is completed, the range select key 31 is pressed to turn it off.

  FIG. 4 is an explanatory diagram of the state of the measurement range before and after the series of operations shown in FIG. 3. FIG. 4A shows that the entire measurement range before the operation can be used, but the shaded range is unnecessary. B) shows a state in which the 30V range and the 600V range are limited to a usable state by the operation.

  FIG. 5 is an explanatory diagram of an operation for limiting the measurement range to be used to the 30 V range and the 600 V range using the menu screen, and the same reference numerals are given to the portions common to FIG. To move to the menu for limiting the measurement range used, press the Range key 5 and then the Select key 9 as shown in (A), then use the rotary knob 6 to move to the measurement range 30V using the cursor. Let As shown in (B), with the cursor moved to the measurement range 30V, the Set key 7 is pressed to determine the measurement range to be used as the measurement range 30V. Similarly, the measurement range 600V is also selected and determined as the measurement range to be used as shown in (C).

  For measurement devices that change the measurement range by key operation, a menu for limiting the measurement range is called up on the dedicated screen by pressing the key for limiting the measurement range, so that the measurement range can be selected from the menu. It may be configured.

  In the above embodiment, the method of limiting the measurement range to be used has been described. However, the measurement range may be limited by disabling the measurement range. In this case, it suffices to select only the ones that are desired to be disabled from the measurement ranges that can be used in the limited menu of the used measurement ranges.

  Further, by applying the limitation of the measurement range to be used to a measuring apparatus having an auto range function, the measurement range that can be selected by the auto range function is limited, so that the auto range can be speeded up.

  Furthermore, by incorporating a learning function based on the usage history of the measurement range, an appropriate threshold is set for the usage frequency, and a measurement range with a certain usage frequency or more is limited to a measurement range that can be automatically used, or the usage frequency is constant. Less than the measurement range can also be automatically disabled.

  As described above, according to the present invention, by limiting the measurement range to be used, the unnecessary measurement range is not passed, so that work efficiency is improved.

  By limiting only the optimum range that suits the purpose of the user, it can be used as a dedicated measuring device, and different ranges are not used for each user, so that the reproducibility of measurement data is improved.

It is a block diagram which shows one Example of the measuring apparatus based on this invention. It is a flowchart explaining the flow of the pre-processing operation | movement for limiting a use range based on this invention. It is explanatory drawing example of operation which limits the measurement range used by UP key 1 and DOWN key 2. FIG. It is state explanatory drawing of the measurement range before and after a series of operation of FIG. It is an explanatory example figure of operation which limits the measurement range used by a menu screen. It is explanatory drawing of the conventional measurement range selection operation part. It is explanatory drawing of a measurement range and an effective input range.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Input terminal 12 Input part 13 Range switching part 14 A / D converter 15 Arithmetic processing part 16 Display part 17 Range designation part 18 Range control part 19 Range memory 20 Data memory 21 Measurement condition setting part

Claims (3)

In a measurement apparatus having a plurality of measurement ranges,
A measuring apparatus provided with means for limiting a usable measuring range. In a measurement apparatus having a plurality of measurement ranges,
A measuring apparatus provided with means for automatically limiting a usable measuring range based on a usage history of the measuring range.   3. The measuring apparatus according to claim 1, further comprising an auto range function for automatically selecting an appropriate measurement range from usable measurement ranges.

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