JP3077216B2 - Digital panel meter - 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 panel meter provided with a plurality of operation switches, a present value display, a set value display, and a set value confirmation lamp on a panel surface.

[0002]

2. Description of the Related Art As a digital panel meter of this kind,
Some have the panel surface shown in FIG. On the panel surface 2 shown in the figure, a current value display 4, a set value display 6, set value confirmation lamps 8a to 8d, an operation switch 1
0 is deployed.

The current value display 4 displays the current pressure measured and calculated by a built-in microcomputer in response to a sensor signal from a pressure sensor, for example.
Displays a set pressure arbitrarily set by the operation switch 10. When the set value confirmation lamp 8a described below with the HH mark is in a lighting state, the set value display 6 displays the maximum upper limit set pressure. The upper limit set pressure is displayed on the set value display 6 when the set value confirmation lamp 8b described below with the H mark is in a lighting state. The lower limit set pressure is displayed on the set value display 6 when the set value confirmation lamp 8c described below with the L mark is in a lighting state. When the set value confirmation lamp 8d described below with the LL mark is in a lighting state, the set value display 6 displays the lowest set pressure.

To explain each set value, when the present pressure displayed on the present value display 4 is within the set pressure range between the lower limit and the upper limit displayed on the set value display 6, Indicates that the pressure is normal, similarly, whether the current pressure is within the set pressure range of the lower limit and the lower limit,
Or, when the pressure is within the set pressure range between the upper limit and the upper limit, it indicates that the current pressure is not normal and is within the danger range.If the current pressure is larger than the upper limit or smaller than the lower limit, the current pressure is Indicates that it is abnormal. These set pressures are set by operating the operation switch 10 and stored in a microcomputer (not shown) with a built-in digital panel meter.

In the above-mentioned structure, the operation switch 10 is operated to set the corresponding set value confirmation lamps 8a to 8a.
By illuminating d and displaying the set pressure on the set value display 6 correspondingly, it is immediately known whether the displayed set pressure is the upper limit or the upper limit. .

[0006]

However, in the above digital panel meter, since one set value display is also used for displaying four set pressures, each of the digital panel meters has a narrow panel surface on the digital panel meter. 4 corresponding to the set pressure
The structure requires the provision of a single set value confirmation lamp, which poses a drawback to the effective arrangement of other components mounted on the panel surface.

In addition, the set values of the upper limit and the lower limit as the normal range are simultaneously displayed, the set values of the upper limit and the upper limit, and the lower limit and the lower limit of the dangerous range are simultaneously displayed, or the abnormal range is displayed. It is convenient to display the set value of a certain upper limit and lower limit at the same time, so that the current value range can be immediately determined.However, the above-mentioned conventional digital panel meter has a single set value display. Because of this, such simultaneous display is not possible.

Therefore, according to the present invention, the number of setting value confirmation lamps is set to half the number of conventional lamps, ie, two, so that other parts can be effectively arranged on a narrow panel surface. Confirmation lamp, maximum, maximum,
Instead of displaying the four types of set values such as the lower limit and the lower limit, it is now possible to display the four types of set values with two set value confirmation lamps, and to use two set value indicators. The purpose is to enable the simultaneous display described above.

[0009]

In order to achieve the above object, in the digital panel meter according to the first aspect of the present invention, the selective display of the two set values, the upper limit and the upper limit, is controlled. The first set value display and the first set value display are turned off in the display mode of one set value and turned on in the display mode of the other set value.
A set value confirmation lamp, a second set value display for selectively displaying two set values, a lower limit and a lower limit, and a second set value indicator.
Is provided with a second set value confirmation lamp which is turned off when the display mode for one set value is displayed and turned on when the display mode for the other set value is displayed.

In a digital panel meter according to a second aspect of the present invention, a first set value display for selectively displaying two set values, ie, an upper limit and an upper limit, is provided. A second set value display in which the selective display of the two set values is controlled, and the two set value displays being lit (or extinguished) when the display mode is the maximum and minimum, respectively, A single set value confirmation lamp that is turned off (or lit) in the display mode of the lower limit and the lower limit.

[0011]

According to the first aspect of the present invention, the first set value confirmation lamp is turned on or off, and the first set value indicator is turned on or off, and the second set value confirmation lamp is turned on or off. By simultaneously displaying the lower limit and the lower limit on the set value display, the range in which the current value is located can be immediately determined.

According to a second aspect of the present invention, when a single set value confirmation lamp is lit (or turned off), each set value indicator simultaneously displays the set values of the upper limit and the lower limit. When the set value confirmation lamp is turned off (or lit), each set value display unit simultaneously displays each set value of the upper limit and the lower limit.

[0013]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a front view of a panel surface of a digital panel meter according to an embodiment of the present invention. On the panel surface 2 of the figure, a present value display 4 and first and second set values are shown. Indicators 6A and 6B and first and second set value confirmation lamps 8A and 8
B and an operation switch 10 are provided. It should be noted that other components are also provided on the panel surface 2, but in the present invention, these components are not shown because they are not required to be described.

The first set value display 6A is also used for displaying two kinds of different set values, the upper limit and the upper limit, and these set values of the upper limit and the upper limit are selectively displayed. The second set value display 6B is also used for two types of display, a lower limit and a lower limit, and these set values of the lower limit and the lower limit are selectively displayed.

The first set value confirmation lamp 8A is controlled to be turned on in the maximum upper limit display mode HH, and is controlled to be turned off in the upper limit display mode H.
B is controlled to be turned on in the lowest display mode LL,
In the lower limit display mode L, the light-off control is performed.

In the first set value display 6A, the first set value
When the set value confirmation lamp 8A is turned on, the upper limit set value is displayed, and when the set value check lamp 8A is turned off, the upper limit set value is displayed. The second set value display 6B displays the second set value. When the value confirmation lamp 8B is turned on, the upper limit set value is displayed, and when the value check lamp 8B is turned off, the lower limit set value is displayed.

Next, the internal circuit of the digital panel meter will be described with reference to FIG. The digital panel meter of FIG. 1 has an input unit 12, a microcomputer 14, a storage unit 16, and an output unit 18.

The input unit 12 is supplied with an input signal from the object to be measured. The input unit 12 converts an analog input signal into a digital signal form that can be processed by the microcomputer 14 together with its level and outputs the signal to the microcomputer 14. .

The microcomputer 14 includes an input unit 12
In response to an input signal given via the, a physical quantity such as a voltage or a current is measured and calculated, and the present value display 4 is driven in accordance with the measured and calculated value to display the measured and calculated value. The set values of the upper limit, the upper limit, the lower limit, and the lower limit set in accordance with the operation input are stored in the storage unit 16, and the respective set values are displayed on the indicators 6 A and 6 B in accordance with the operation of the operation switch 10. Control of turning on and off the set value confirmation lamps 8A and 8B is performed. When the microcomputer 14 determines that the measured value is dangerous or abnormal with respect to the set value, the microcomputer 14 outputs the determination result to the output unit 18. The output unit 18 is connected to the microcomputer 14
Is output to an alarm (not shown).

Referring to the flowchart of FIG. 3, the display on the set value indicators 6A and 6B and the set value confirmation lamps 8A and 8B are provided.
The operation of turning on and off the LED will be described. In step n1, the microcomputer 14 controls the setting value display 6
The display contents of A and 6B are reset, and all the set value confirmation lamps 8A and 8B are turned off.

In step n2, when the microcomputer 14 determines from the operation input from the operation switch 10 that the display mode is the maximum display mode (HH), the microcomputer 14 turns on the first set value confirmation lamp 8A in step n3. The maximum set value set by operating the operation switch 10 on the first set value display 6A (however, when the maximum set value is already set and stored in the storage unit 16, the maximum set value is stored. The maximum set value is read from the unit 16 and the read maximum set value is displayed. The same applies hereinafter.), And if it is determined that the display mode is not the maximum display mode, the process proceeds to step n4. In step n4, when the microcomputer 14 determines that the display mode is the upper limit display mode (H) as in step n2, the microcomputer 14 proceeds to step n5.
Then, the first set value confirming lamp 8A is kept off and the first set value display 6A displays the upper limit set value. If it is determined that the display mode is not the upper limit display mode, the process proceeds to step n6.

At step n6, the microcomputer 1
Step 4 is a step n7 when it is determined from the operation input from the operation switch 10 that the display mode is the lowest display mode (LL).
To turn on the second set value confirmation lamp 8B, display the lowest set value set by operating the operation switch 10 on the second set value display 6B, and determine that the mode is not the lowest display mode. Shifts to step n8. In step n8, when the microcomputer 14 determines that the display mode is the lower limit display mode (L) as in step n6, the microcomputer 14 determines in step n9 the second set value confirmation lamp 8B.
Is turned off, the second set value display 6B displays the lower limit set value, and when it is determined that the display mode is not the lower limit display mode, the process proceeds to step n10. At step n10, it is determined whether or not the set value displayed on the set value display has been changed. If the set value has been changed, the process returns to step n2. In this case, steps n2, n4, n
In steps 6 and n8, only the steps in which the set values are changed go to steps n3, n5, n7 and n9, respectively, and the set values corresponding to the changes are displayed.

FIG. 4 is a block diagram of a digital panel meter according to another embodiment of the present invention. Parts corresponding to those in FIG. 1 are denoted by the same reference numerals, and the detailed description of the same reference numerals is given. Is omitted. The characteristic feature of the digital panel meter shown in FIG. 4 is that a single set value confirmation lamp is indicated by reference numeral 8C. , And the lower limit of the set value, for example, when lit, the upper limit of the set value on the first set value display 6A,
The lower limit of the set value is displayed on the second set value display 6B, and when the light is off, the first set value display 6A
Indicates the upper limit of the set value, and the lower limit of the set value is displayed on the second set value display 6B. Therefore, the upper limit and the lower limit, and the upper limit and the lower limit are simultaneously displayed on both the set value indicators 6A and 6B.

[0025]

As is apparent from the above description,
The digital panel meter according to claim 1 of the present invention has first and second set value indicators, and first and second set value confirmation lamps, and the first set value indicator. Then, the selective display of the two set values of the upper limit and the upper limit is controlled, and the first set value confirmation lamp is turned off when the first set value display is in the display mode of one set value, In the display mode of the other set value, it is lit, and the second set value display controls the selective display of the two set values of the lower limit and the lower limit. When the second set value display is in the display mode of one set value, the light is turned off, and when the second set value display mode is in the display mode of the other set value, the light is turned on. The number is reduced, and other parts can be effectively arranged on a narrow panel surface. It is possible to simultaneously display the upper and lower setting values and the upper and lower limit values simultaneously, for example, with the set value display, and check how the current value is in relation to the set value. Is immediately possible.

In the digital panel meter according to a second aspect of the present invention, a single set value confirmation lamp is provided for each of the two set value indicators, for example, each set value indicator is lit when it is lit. The upper limit and the lower limit are displayed at the same time, and when they are off, the upper limit and the lower limit of the set value are displayed at the same time, so that other parts can be effectively deployed as in claim 1. , And it is possible to immediately confirm the set value of the current value.

[Brief description of the drawings]

FIG. 1 is a front view of a panel surface of a digital panel meter according to an embodiment of the present invention.

FIG. 2 is a block diagram of a digital panel meter according to the embodiment of the present invention.

FIG. 3 is a flowchart for explaining the operation of the embodiment.

FIG. 4 is a block diagram of a digital panel meter according to another embodiment of the present invention.

FIG. 5 is a front view of a panel surface of a conventional digital panel meter.

[Explanation of symbols]

 2 Panel surface 4 Current value display 6A, 6B Set value display 8A, 8B, 8C Set value confirmation lamp 10 Operation switch 14 Microcomputer

Claims (2)

(57) [Claims] 1. A first set value display (6A) in which selective display of two set values of a maximum limit and an upper limit is controlled, and a first set value display (6A) includes one set value. A first set value confirmation lamp (8A), which is turned off in the value display mode and turned on in the other set value display mode, and selectively displays two set values, a lower limit and a lower limit. A second set value display (6B) to be controlled, and a second set value display (6B)
A second set value confirmation lamp (8B), which is turned off when the display mode of one set value is displayed, and is turned on when the display mode of the other set value is displayed. Meter. 2. A first set value display (6A) in which selective display of two set values of a maximum and an upper limit is controlled, and a selective display of two set values of a minimum and a minimum is performed. Controlled second
Set value display (6B), and both set value displays (6B)
A, 6B) are lit (or extinguished) in the display mode of the uppermost and lowermost limits, respectively, and are extinguished (or lit) in the display mode of the upper and lower limits, respectively. (8C). A digital panel meter, comprising: