JP3322419B2 - Digital display - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a digital display device for determining the level of an analog input and digitally displaying the level.

[0002]

2. Description of the Related Art As a conventional digital display device, FIG.
As shown in (1), there is a type that determines whether the analog input exceeds the upper limit value, falls below the lower limit value, and falls between the upper and lower limit values, and outputs a determination signal corresponding to each case. In FIG. 5, a discrimination signal when the level of the analog inputs exceeds the upper limit value HI, a determination signal L O when the lower limit, a determination signal when it is in between the upper and lower limit values GO
It is shown as

[0003]

However, in this type of conventional digital display device, generally, the upper and lower limit values (in some cases, one discrimination value) for discriminating the level of the analog input are fixed. For this reason, there is a problem that it is not possible to perform more detailed level determination. SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and an object of the present invention is to provide a digital display device that can more precisely determine an analog input.

[0004]

According to the present invention, when the level of the analog input exceeds the upper limit value, when the level is lower than the lower limit value, and when the level is between the upper and lower limit values, a determination signal corresponding to each is determined. A plurality of discrimination blocks to be output are provided, and the upper and lower limits of each of these discrimination blocks are different. Within the range between the lower limits,
If the level of the analog input input to each of the plurality of determination blocks is outside the range between the upper and lower limits, the upper and lower limit values of the determination blocks whose analog input levels are outside the range between the upper and lower limits are set. A determination signal indicating that the value falls outside the range between the upper and lower limits is output only from the determination block having the widest range between the upper and lower limits, and if the level of the analog input falls within the range between the upper and lower limits, all determinations are performed. It is provided with control means for outputting a determination signal indicating that the level of the analog input is in the range between the upper and lower limit values of only the narrowest decision block ranging between among the lower limit of the block to decision block each.

[0005]

The present invention has the above-described structure,
Using the output of each determination block, level determination can be performed in a level range obtained by dividing the analog input into a plurality of parts, and the level of the analog input can be further finely determined.

[0006]

1 to 4 show an embodiment of the present invention. As shown in FIG. 1, the digital display device according to the present embodiment determines whether the analog input level exceeds the upper limit value, falls below the lower limit value, and falls between the upper and lower limit values. A plurality of discriminating blocks A that output discriminated discrimination signals. The output of each discriminating block A is used to determine the level of an analog input in a plurality of divided level ranges, thereby enabling a finer discrimination of the analog input level. It is. Incidentally, the discrimination signal when the level of the analog input in the case of this embodiment exceeds the upper limit value HI, a determination signal L O when the lower limit, a determination signal when it is in between the upper and lower limit values GO The following description will be made.

The discrimination block A includes an input unit 1 for receiving an analog input, an A / D converter 2 for converting the analog input input from the input unit 1 into a digital value, and an upper limit for setting an upper limit and a lower limit. And a lower limit setting unit 3, a comparing unit 4 for comparing the upper limit value and the lower limit value set by the upper limit / lower limit setting unit 3 with the conversion output of the A / D converter 2, and a comparing unit 4.
An output unit 5 that generates an output according to the comparison result of the output unit, a control signal output unit 6 that outputs a control signal corresponding to the comparison output of the output unit 5 to the preceding determination block A, and a subsequent determination block An output control unit 7 that controls the output of the output unit 5 in accordance with the control signal output from the control unit A, and a display unit 8 that displays a comparison result by the comparison unit 4 under the control of the output control unit 7.
And a buffer 9 provided to output an analog input input through the input unit 1 to the subsequent determination block A.
It is composed of The output unit 5 is configured by a plurality of contacts that generate an output according to the determination signal.

Hereinafter, a case where the analog input is finely determined by using the four determination blocks A will be described. The upper limit value and the lower limit value set by the upper / lower limit setting unit 3 of each of the discrimination blocks A _{1 to} A ₄ are set to different values as shown in FIG. Here, in decision block A _1,
The most width of the upper and lower limit values is narrow, determined in block A ₂ the upper and lower limit values of the form containing the upper and lower limit values are set, similarly decision block A ₃ is a lower limit on the form, including the upper and lower limit values of the discrimination block A ₂ The value is set, and the determination block A ₄ is determined by the determination block A ₃
The upper and lower limits of the largest range including the upper and lower limits are set. For example, when the absolute values of the analog input are determined by the determination blocks A _{1 to} A ₄ , the absolute values of the upper and lower limits are determined by the determination block A ₁ <the determination block A ₂ <the determination block A _3.
<It has a discrimination block A _4.

Each of the discrimination blocks A _{1 to} A ₄ is shown in FIG.
By respectively cascaded as shown in, the discriminating analog input inputted to the decision block A ₁ block A ₁
Send sequentially to each determination block A ₂ to A ₄ via the input unit 1 and the buffer 9 to A _3. The output GO when the analog input is a level between the upper and lower limit values, so as to use only the output of the decision block A _1, the output GO of another decision block A ₂ to A ₄ so as not to output is there. Then, the control signal output section 6 of the decision block A ₂ to A _4, the level of the analog input in the comparison section 4 outputs the respective control signals in response to the case below the case exceeding the upper limit.

[0010] Now, when the level of the analog input is determined to exceed the upper limit by the comparing unit 4 of the decision block A _4,
As shown in section 5 in FIG. 4, and outputs a control signal corresponding to the discrimination block A _3, and stops the output of the HI in decision block A _3. Hereinafter, determination block A
₃ from the determination block A _2, determination similar control from the block A ₂ and the discrimination block A ₁ is performed, HI is output only from decision block A ₄ in this case.

Further, when the level of the analog input is determined to exceed the upper limit by the comparing unit 4 of the determination block A _3,
As shown in the section 3 in FIG. 4, and outputs a control signal corresponding to the discrimination block A _2, it stops the output of the HI in decision block A _2. Hereinafter, determination block A
Performed the same control from ₂ to decision block A _1, HI is output only from decision block A _3.

Although the above description has been made on the case where the level of the analog input exceeds the upper limit in the comparing section 4, the same applies to the case where the level of the analog input falls below the lower limit. output control ₁ to a ₄ is performed.
For example, the s husband 3 decision block A ₁ to A
The display in the case where the upper and lower limit values of ₄ are set will be described in summary. It should be noted that one frame in the figure corresponds to a digital step, and is referred to as respective ranges 1 to 9.

In the range 4 to 6, the determination block A₁Smell
The analog input level in the comparator 4 exceeds the upper limit.
Is below the lower limit and between the upper and lower limits
The determination result of the case is used. In addition, these ranges 4 to 6
Discrimination block A_TwoOf the analog input
The case between them is shown. In ranges 3 and 7, the discrimination block
Lock A_TwoOf the analog input in the comparison unit 4 at
Is above the upper limit and below the lower limit.
Different results are used. In the ranges 2 and 8, the discrimination block A
_ThreeThe level of the analog input in the comparison unit 4 at the upper limit
When the value exceeds the value and when the value falls below the lower limit,
In the range 1 and 9, the discrimination block A_FourIn the comparison section 4
If the analog input level exceeds the upper limit and
The determination result when the value is below the limit value is used. in this way
And display, divide the level of analog input into 9
Can be distinguished by the shape. The above display is for each discrimination block
A ₁~ A_FourMay be performed on the display unit 8 of
Determination block A₁~ A_FourOne using the output of
You can also use the display device to display the level results.
You.

[0014]

As described above, according to the present invention, when the level of the analog input exceeds the upper limit value or falls below the lower limit value,
And to determine when it is in between the upper limit value, it is provided a plurality of decision block for outputting a discrimination signal corresponding to the respective different respective upper and lower limits of these decision block, the range between the upper limit value of the maximum range Except for the above, the range between the upper and lower limits of each other is included in the range between the upper and lower limits of the other determination blocks, and the level of the analog input input to each of the plurality of determination blocks is the range between the upper and lower limits. If the analog input level is outside the range between the upper and lower limits, only the determination block having the widest range between the upper and lower limits among the determination blocks whose analog input level is outside the range between the upper and lower limits is out of the range between the upper and lower limits. while for outputting a discrimination signal indicating, when the level of the analog input is in the range between the upper limit value, the narrowest decision block only from the analog input levels ranging between among the lower limit of all the decision block Upper and lower limit Since control means for outputting a determination signal indicating that the signal is within the range is provided in each of the determination blocks, level determination can be performed in a level range obtained by dividing the analog input into a plurality using the output of each determination block, The level of the analog input can be determined more finely.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration of each determination block according to an embodiment of the present invention.

FIGS. 2 (a) and 2 (b) are a configuration diagram of a digital display device configured by using a plurality of devices, and an explanatory diagram of a level display state thereof.

FIGS. 3A and 3B are an explanatory diagram of an operation control state of each discrimination block and an explanatory diagram showing which discrimination block output is used in each level range.

FIG. 4 is a detailed explanatory diagram of a partial operation in FIG. 3;

FIG. 5 is an explanatory diagram of a conventional level display method.

[Explanation of symbols]

 A determination block 3 upper / lower limit setting unit 4 comparison unit 5 output unit 6 control signal output unit 7 output control unit

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-2-26217 (JP, A) JP-A-2-290569 (JP, A) JP-A-4-1799991 (JP, A) JP-A-61- 122574 (JP, A) Japanese Utility Model 56-122956 (JP, U) Japanese Utility Model 59-1949064 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) G09G 3/04 G01D 7 / 00 302 G01R 19/00

Claims (1)

(57) [Claims] 1. A plurality of discriminating blocks for discriminating whether the level of an analog input exceeds an upper limit value, falls below a lower limit value, and lies between an upper limit value and a lower limit value, and outputs a discrimination signal corresponding to each of them. The upper and lower limits of each of these discriminating blocks are different, and the range between the upper and lower limits of each other is included in the range between the upper and lower limits of the other discriminating blocks except for the range between the upper and lower limits of the maximum range. If the level of the analog input input to each of the plurality of determination blocks is out of the range between the upper and lower limits, the analog input level is out of the range between the upper and lower limits. From only the judgment block with the widest range between the lower and upper limits to the
While for outputting a discrimination signal indicating that become, when the level of the analog input is in the range between the upper and lower limits are all
Provided control means of the narrowest decision block only from the analog input levels ranging between among the lower limit of determination block to output a determination signal indicating that the range between the upper and lower limit values in decision block each A digital display device comprising: