JP3312156B2 - Measuring equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a measuring instrument having a display section such as a digital panel meter, and more particularly to an improvement in the display.

[0002]

2. Description of the Related Art Conventionally, the display unit of this type of measuring instrument, for example, a digital panel meter , is subject to variations in parts.
Display brightness may vary from one display digit to another, or
Even if it is difficult to see the display because it varies from device to device
There is a drawback.

[0003] In addition, the digital panel meter
Some digital values are displayed as they are,
Digital display of measurement values input in this way
In the case of sub-displays, subtle fluctuations in measured values
The difficulty is that the digits fluctuate and the displayed value is very difficult to read.
is there.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and has been made in consideration of the above-described problems, and is intended to address a problem that arises in a display device of a measuring instrument.
Main purpose of compensating for variations in brightness between devices and devices
In addition, changes in the lower digits due to subtle fluctuations in measured values
It is an object of the present invention to suppress movement and make the display easy to see .

[0005]

In order to achieve the above-mentioned object, the present invention is configured as follows.

[0006] Sunawa Chi, the present invention, the input of a plurality of display digits
In a measuring device for dynamically lighting and displaying a value, adjusting means operated to adjust the display brightness of each display digit, and control means for controlling the lighting time of each display digit according to the adjusting operation by the adjusting means. , The given lower digit
Input value that divides the range and the lower digit value belongs to the above-mentioned category
For the division, the lower digit
By displaying the lower digit as 2
Jump table with 5 jumps, 10 jumps, or 100 jumps
Indicating means, and jump indication by the jump indication means.
No jump display, 2 jumps, 5 jumps, 10 jumps, 100 jumps
A key input section for selecting and setting cyclically by jumping .

[0007]

According to the present invention, since the lighting time of each display digit is controlled in accordance with the adjustment operation, it is possible to eliminate the variation in display brightness for each display digit or for each device by the adjustment operation. In addition, the lower digits are jumped and displayed.
In this way, the display of low-order digits is suppressed and the display is easy to see.
Become.

[0009]

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a block diagram of a digital panel meter 1 according to an embodiment of the present invention. In FIG. 1, reference numeral 2 denotes an input circuit to which an output from a sensor (not shown) or the like is input as a measured value; 2, a key input unit including a function selection switch 4 and up / down keys 5 and 6 provided on the front surface of the digital panel meter 1, and a microcomputer 7 for controlling each unit in accordance with the setting by the key input unit 3. Reference numeral 8 denotes an output circuit for operating an alarm (not shown) according to the output from the microcomputer 7, and reference numeral 9 denotes four display digits which are provided on the front surface shown in FIG. 2 and display measured values and set values by dynamic lighting. The digital display 10 having 9a to 9d is a memory IC in which data such as jump values for jump display of measured values is stored as described later. FIG. 2 shows a state where the front panel is removed.

In the digital panel meter 1 of this embodiment, when the input measured value is displayed on the digital display 9, the lower digit of the display is prevented from changing due to a minute change of the measured value. In order to make the numerical values easy to see, the range of the numerical value of the predetermined lower digit is divided, and the numerical value of the lower digit is an input value belonging to the division, and a numerical value predetermined for each division is set as the numerical value of the lower digit. By displaying, the numerical value of the lower digit is jumped and displayed.

The jump display will be described with reference to FIG.
This will be specifically described. In FIG. 3, the measured value
The lower digit display numerical values in the case of 2 jumps, 5 jumps, 10 jumps and 100 jumps are shown.

For example, in the case of two jumps of the least significant digit, the numerical values 1 to 0 of the least significant digit are divided into five parts, and the display numerical value of each division is set to 2, 4, 6, 8, 0, and If the least significant digit of the value is 1 or 2, 2 is displayed. If the least significant digit of the measured value is 3 or 4, 4 is displayed, and the least significant digit of the measured value is If it is 5 or 6, 6 is displayed, and similarly, if the least significant digit of the measured value is 9 or 0, 0 is displayed.

In the jump of the least significant digit, the numerical values 1 to 0 of the least significant digit are divided into two, and the display numerical value of each division is set to 5, 0. If the numerical value is 1 to 5, 5 is displayed, and if the numerical value of the least significant digit of the measured value is 6 to 0, 0 is displayed.

The same applies to 10 jumps and 100 jumps.

In such a jump display, a change in the numerical value of the lower digit is suppressed so that the display is easy to see. In addition, there is an averaging process as a method of suppressing the change in the displayed numerical value. .

That is, for example, as shown in FIG. 4, in the case of the averaging process, a plurality of measurement data (four in FIG. 4) are required for averaging, and the responsiveness is reduced. In the case of the jump display, since one display data can be obtained for one measurement data, it is possible to suppress the variation of the display numerical value without lowering the responsiveness.

In this embodiment, jump values such as two jumps, five jumps, and ten jumps are set by the dip switches of the key input unit 3 and the up / down keys 5 and 6 as shown in FIG.

That is, the dip switch is turned on to set a mode for setting the jump value (step n1). Then, the up / down keys 5 and 6 are operated to display no jump and to set the jump values 2, 5, 10. Select one (Step n2)
The RUN mode is set by turning off the dip switch (step n3).

The microcomputer 7 as the display control means performs the above-mentioned jump display according to this setting.

As a result, the lower digits of the measured value are displayed by jumping, and the display numerical value is suppressed from fluctuating and the display is easy to see without lowering the response.

In this embodiment, the jump value is set by the setting operation of the key input section 3. However, as another embodiment of the present invention, for example, as shown in FIG. May be set automatically.

That is, data for n times is fetched (step n1), and it is determined whether or not the least significant digit has changed (step n2). It is determined whether or not there is a characteristic (step n3). If there is a periodicity, a jump value is determined from the width (amplitude) of fluctuation in a certain time so that the display changes within a certain number of times within the certain time. (Step n
4) Thereafter, jump display of the least significant digit is performed according to the determined jump value.

In the above-described embodiment, the jump of the input measured value is displayed. However, when the average value or the mode of the measured values is displayed, the average value or the mode is displayed. The present invention is applicable even when it fluctuates.

Further, as another embodiment of the present invention, when there is no input of a measured value, in order to suppress a change in the displayed numerical value and make the display easy to see, for example, as shown in FIG. A value that is greater than or equal to a constant value (-1) and less than or equal to a constant value (+1)
A partial jump display may be performed, such as displaying as 0.

Next, other functions of the digital panel meter 1 shown in FIG. 1 will be described.

The digital panel meter 1 of this embodiment is
In addition to the jump display function described above, the digital display 9
The following configuration is adopted to adjust the variation in the brightness of the three display digits 9a to 9d to provide a display that is easy to see.

That is, the digital display 9 having the four display digits 9a to 9d is dynamically turned on by the microcomputer 7 as the display control means, and the microcomputer 7 has a key input function as an adjustment means. The lighting time of each digit is controlled in accordance with the adjustment operation of the unit 3.

In this embodiment, as shown in FIG.
Each of the phases 1 to 4 is made to correspond to the LED of each of the display digits 9a to 9d, the first display digit 9a is turned on in phase 1, the second display digit 9b is turned on in phase 2, and the third display digit is turned on in phase 3. The display digit 9c is turned on, and the fourth
Is turned on, and the same lighting operation is repeated to make dynamic lighting.
The function selection switch 4 sets the brightness adjustment mode for each digit, and operates the up / down keys 5 and 6 to adjust the brightness of each of the display digits 9a to 9d. This adjustment operation need only be performed for display digits whose luminance is different from those of other display digits.

For this adjustment operation, the microcomputer 7
Is to adjust the brightness by adjusting the phase time, that is, the lighting time. When the adjustment operation is completed, the mode is released, and thereafter, the dynamic lighting is performed with the set phase time.

In FIG. 8, the third display digit 9c is shown.
In this example, the phase time (low-level period) of the phase 3 corresponding to the above is set to twice the time of the other phases, and the brightness of the third display digit 9c is increased.

As described above, when there is a variation in the brightness of each of the display digits 9a to 9d of the digital display 9, the lighting time is adjusted to correct the variation. The display is resolved and is easy to see.

In the above-described embodiment, the phase time corresponding to each of the display digits 9a to 9d is adjusted to correct the variation in luminance. However, as another embodiment of the present invention,
As shown in FIG. 9, the phase time may be fixed, and the number of phases assigned to each display digit may be adjusted.

That is, in FIG. 9, two phases are assigned to the first, third and fourth display digits 9a, 9c and 9d, and three phases are assigned only to the second display digit 9b. The first display digit 9a is turned on in phases 1 and 2, and in phase 3, none of the display digits is turned on.
Turns on the second display digit 9b, and turns on the third display in phases 7 and 8.
Is turned on, no display digits are turned on in phase 9, the fourth display digit 9d is turned on in phases 10 and 11, and no display digits are turned on in phase 12, The same lighting operation is repeated.

[0036]

Although the above embodiment has been described with reference to a digital panel meter, the present invention is not limited to a digital panel meter, but can be similarly applied to other measuring instruments for digital display.

[0038]

As described above, according to the present invention, since the lighting time of each digit is controlled in accordance with the adjustment operation, the variation in the display brightness for each digit or each device is corrected, and the display becomes easy to see. . Also, since the display jump a number of subordinate digit, the easy-to-read display fluctuations in the lower digits of the display numerical value is suppressed.

[Brief description of the drawings]

FIG. 1 is a block diagram of one embodiment of the present invention.

FIG. 2 is a view showing a front surface of the panel of the embodiment of FIG. 1;

FIG. 3 is a diagram illustrating a relationship between a measured value and a display value.

FIG. 4 is a diagram for explaining a difference between averaging processing and jump display.

FIG. 5 is a flowchart for explaining the operation.

FIG. 6 is a flowchart for explaining the operation.

FIG. 7 is a diagram illustrating an example of a partial jump display.

FIG. 8 is a diagram showing phases of an embodiment of the present invention.

FIG. 9 is a diagram showing phases of another embodiment of the present invention.

[Explanation of symbols]

 1 digital panel meter 3 key input section 7 microcomputer 9 digital display

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Claims (1)

(57) [Claims] 1. A measuring device for dynamically lighting and displaying an input value at a plurality of display digits, comprising: an adjusting unit operated to adjust the display brightness of each display digit; The control means for controlling the lighting time of the display digit and the range of the numerical value of the predetermined lower digit are divided, and the numerical value of the lower digit is
For the input values belonging to the category,
By displaying the lower value as the lower digit.
The lower digit can be changed by 2 jumps, 5 jumps, 10 jumps,
Means for displaying a jump in 100 jumps, and jump display by the means for displaying the jump,
Cycling with 2 jumps, 5 jumps, 10 jumps, 100 jumps
And a key input unit for selecting and setting the key in a measuring device.