JPH0697809B2 - Demand power monitoring device - Google Patents

Description

TECHNICAL FIELD The present invention relates to a demand power monitoring device, and more particularly to a display device thereof.

[Prior Art] FIG. 3 is a perspective view showing a conventional demand power monitoring device disclosed in, for example, Japanese Utility Model Publication No. 55-35571, and FIG. 4 is a block diagram showing a display device of the device. In FIG. 3, on the display plate (1) provided on the front surface of the case of the power demand monitoring device, n lightning indicators (33L ₁ , 33L ₂ , 33L ₃ ,
························ 33L _n ) (hereinafter, referred to as a display device) is continuously adjacent to each other and is provided with a display device group (33L). This display group (33L) is for power demand, and it is sequentially turned on in the form of a bar graph corresponding to the power consumed by the load so that the power demand value at that time can be read by the scale value (34). Has become. In addition, in parallel with this display group (33L), the other n display units (43L ₁ , 43L _{1
L 2, 43L 3 ···· 43L n} ) continuously to adjacent display group arranged in a strip (43L) is provided. Display group (4
3L) is for a time period, and is sequentially turned on in the form of a bar graph corresponding to the elapsed time of the demand period, and the elapsed time at that time can be read by the scale value (44). The operation of these display groups (33L, 43L) will be described in more detail.

The demand power monitor receives a pulse signal transmitted from a power meter (not shown) corresponding to the amount of power consumed by the load. This pulse signal is integrated in the device, and when the specified unit power amount is reached, the leftmost display unit (33L ₁ ) of the demand power display unit (33L) is turned on and the next unit power amount is consumed. Turn on the display (33L ₂ ). In this way, the indicators of the indicator group (33L) are turned on sequentially from the left end each time the unit power consumption is consumed. Is the power demand consumed up to that point. On the other hand, when the unit time elapses, the leftmost display unit (43L ₁ ) of the time display unit group (43L) is turned on, and when the next unit time passes, the display unit (43L ₂ ) is turned on. In this way, each time the unit time elapses, the display group (43L) is lit up from the left end, so the lit up display is a bar graph as a whole, and the length of the lit up display is at that time. Indicates the time elapsed up to. The specified time limit for power demand, for example, 30
After a lapse of minutes, the indicator group for demand power (33L) and the indicator group for time limit (43L) that have been turned on are turned off, and the load from the leftmost indicator (33L ₁ , 43L ₁ ) is restarted in sequence. Lights up in response to power consumption and the passage of time. In addition, the length of both display unit groups (33L, 43L) is a predetermined value in the display unit group (33L), for example, the length to the display unit (33L _n ) corresponding to the contracted power value and the display unit group (43L). ), A predetermined value, for example, a length up to the display (43L _n ) corresponding to the demand time limit value is configured to match.

In the conventional demand power monitor configured in this way, the display unit for the time period (43L) lights up at a constant pace, so the length of the bar graph of the lit display unit group (43L) is consumed at that time. It corresponds to the target power demand that should be met. On the other hand, the length of the bar graph of the illuminated display unit of the power demand display group (33L) corresponds to the demand power actually consumed by the load up to that point. Therefore, comparing the lengths of both bar graphs, if the time bar graph is longer than the power demand bar graph, the power demand should be below the target value at the end of the time period, but conversely the time bar graph If it is shorter than the bar graph for power demand, it can be known visually that the power demand may exceed the target value at the end of the time period. In such a case, it is necessary to take measures to prevent the target value from being exceeded by adjusting the load.

In this way, the lengths of both bar graphs can be monitored, and the relative relationship between the lengths can be used to understand how the demand power is in relation to the target value.

The configuration and operation of the above conventional example will be described in more detail with reference to the block diagram of the circuit shown in FIG. In the figure, a pulse signal transmitted from the power meter with a transmitting device (51) corresponding to the amount of power consumed by a load is converted into a pulse signal for each unit amount of energy by a pulse conversion circuit (52). The unit power amount is a value obtained by dividing the target demand power value by the number of demand power indicators (33L _{1 to} 33L _n ) provided correspondingly. The pulse signal for each unit power amount is input as a clock signal to the shift registers (61S _{1 to} 61S _n ). That is, although all of them were initially at the L level, when the first pulse signal comes, the shift register (61S ₁ ) of the first stage becomes the H level, and by the next pulse signal, the first stage (61S ₁ ) and The two-stage (61S ₂ ) shift register becomes H level. The shift registers (61S _{1 to} 61S _n ) having the same number of stages as the number of pulse signals thus received are set to H level.
It becomes a level. Due to this level change, an indicator (33L ₁ ) for demand power is supplied through the driver circuits (71D _{1 to} 71D _n ) directly connected to the respective stages of the shift register (91S _{1 to} 61S _n ).
Controls turning on / off of ~ 33L _n ). That by previously shift register (61S ₁ ~61S _n) display corresponding to the H level and became stage in the (33L ₁ ~33L _n) to be illuminated, indicator (33L ₁ ~33L _n) The number that is lit indicates the demand power consumed up to that point. On the other hand, the clock pulse signal at a constant interval transmitted from the timepiece device (81) is converted into a pulse signal for each unit time by the pulse conversion circuit (82). The unit time is a value obtained by dividing the specified demand power time limit by the number of the demand power indicators (33L _{1 to} 33L _n ). The pulse signal for each unit time is input as a clock signal to the shift registers (62S _{1 to} 62S _n ).
That is, all of them were initially at the L level, but when the first pulse signal comes, the shift register (62S ₁ ) of the first stage becomes the H level, and by the next pulse signal, the first stage (62S ₁ ) and The 2-stage (62S ₂ ) shift register is H
It becomes a level. The shift registers (62S _{1 to} 62S _n ) having the same number of stages as the number of pulse signals received in this way become H level. Due to this level change, the time display (43L ₁ to 43L) is sent through the driver circuit (72D _{1 to} 72D _n ) directly connected to each stage of the shift register (62S _{1 to} 62S _n ).
Controls lighting and extinguishing of L _n ). That is, the shift register (62S ₁ ~62S _n) display corresponding to the H level and became stage in by previously so as to turn on the (43L ₁ ~43L _n), display (43L ₁ ~43L _n) The number of lights in indicates the time elapsed up to that point.

Indicators as described above (33L _{1 to} 33L _n and 43L _{1 to} 43L _n )
Are sequentially turned on in the form of a bar graph, and when the specified demand time period has elapsed, the corresponding device (43L _n ) is turned on to end the time period, and the reset signal (9) is transmitted from the shift register (62S _n ). By this reset signal (9),
All of the time shift registers (62S _{1 to} 62S _n ) and demand power shift registers (61S _{1 to} 61S _n ) have returned to the L level,
The time limit starts.

[Problems to be Solved by the Invention] In the conventional demand power monitoring apparatus as described above, all of the indicators corresponding to the demand power and the elapsed time from the start of the time period to an arbitrary time point must be turned on. Power consumption increases. When the amount of power consumption increases, the amount of heat generated also increases, which requires a countermeasure against the heat, resulting in a problem that the device becomes large.

Further, since the display group for power demand (33L) displays only up to a predetermined target value, there is a problem that it is difficult to determine whether the power demand has exceeded at the end of the time limit.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a demand power monitoring apparatus capable of downsizing the apparatus and determining how much the demand power exceeds a target value. To do.

[Means for Solving the Problem] A demand power monitoring apparatus according to the present invention displays elapsed time of a demand time period, and a time period display group provided substantially in a linear form and a power meter emit the time period. Displaying the amount of power used in the demand time period based on the number of pulses, the display start side end portion is aligned substantially linearly with the display start side end portion of the display unit for the time limit, and For each block, a display unit group for power demand, the other end portion of which is extended from a position corresponding to the other end portion of the same display group, and each block obtained by dividing each of the above display unit groups by a predetermined number And a display group driving means for driving.

[Operation] In the present invention, the display unit group for the time period and the display unit group for the power demand longer than the display unit group are driven for each block obtained by dividing the display unit group by the predetermined number.

[Embodiment] FIG. 1 is a block diagram showing an embodiment of the present invention.
Input interface (21) in the power demand monitoring device (1)
Receives a number of pulses corresponding to the amount of power consumed by the load from a power meter with a transmitter (51) outside the device. The output of the input interface (21) is sent to the arithmetic processing unit (24). The arithmetic processing section (24) further reads the data of the setting section (22) for setting the target value and the like and the clock section (23) for timing and performs arithmetic operation. The arithmetic processing section (24) drives the driver circuit (25) based on the arithmetic result, and lights the required power display unit group (33L) and the time display unit group (43L) as many as necessary. The arithmetic processing section (24) and the driver (25) form a display group driving means (26).

FIG. 2 is a front view showing a display group provided on the front surface of the demand power monitoring apparatus according to the embodiment of the present invention. The casing of the device is the same as the conventional power demand monitoring device shown in FIG. 3, and therefore its illustration and description are omitted. In FIG.
The display group for power demand (33L) consists of nn display units (33L ₁ , 33
L ₂ , 33L ₃・ ・ ・ 33L _n , 33L _{n + 1} , ・ ・ ・ 33L _nn ) are continuously arranged adjacent to each other in a strip shape, and are sequentially lit up in a bar graph in accordance with the elapsed time. The power demand value at that time can be read by the scale value (34). In the example shown in the figure, the scale value (34) is 0 at the start of the time period and 100 (%) at the end of the time period. Meanwhile, timed indicator group for (43L) are those in which n display unit _{(43L 1, 43L 2, 43L} 3, ···· 43L n) are continuously adjacent to and disposed in a strip, the demand The bar graphs are sequentially lit according to the elapsed time, and the elapsed time at that time can be read by the scale value (44). In the example shown in the figure, the scale value (4
4) shows 0 at the start of the time limit and 30 (minutes) at the end of the time limit.

Next, the lighting order of these display device groups (33L, 43L) will be described in detail. In the display group for power demand (33L), from the leftmost display (33L ₁ ) to 33L ₂ , 33L ₃ , ... 33L _n-1 , 3,
Turn on 3L _n . Similarly, in the time display group (43L), the leftmost display group (43L ₁ ) is sequentially displayed 43L ₂ , 43L ₃ ... 43L _n-1 , 43
Turn on L _n . Furthermore, display group for demand power (33L)
In the case of 100 (%) of the scale value (34), that is, exceeding the target value, the display (33L _{n + 1} , 33L _{n + 2} , ... 3
3L _nn ) lights up one after another.

Once turned on, the indicator that lights in the above lighting order does not continue to light until the end of the time period, but turns off for each block. That is, in the power demand display group (33L), the display units (33L _{1 to} 33L ₅ ) are connected to the first block (33L ₆
~33L ₁₀₎ the second block _{··· (33L n-4 ~33L n} ) the n-th block, (a _{33L n + 1 ~33L n + 5} ) as the (n + 1) -th block, display of the first block (33l _{1 to} 33L ₅ ) are all turned on, and when the second block indicators (33L _{6 to} 33L ₁₀ ) start to be turned on, all the 1st block indicators (33L _{1 to} 33L ₅ ) are turned off. Similarly, the Invite display order upon n blocks (33L _n-4 ~33L _n) and lights all the (n + 1) th block indicator _{(33L n + 1 ~33L n +} 5) is starts to light up Turn off all the display devices (33L _{n-4 to} 33L _n ) of n blocks. In the display unit group (43L) for time period, the display unit (43L ₁ ~ 43L
₅ ) is the first block, (43L _{6 to} 43L ₁₀ ) is the second block,
Similarly, (43L _{n-4 to} 43L _n ) is set as the nth block,
As with the case of the power demand display group (33L), the display is turned on in block units.

In the above embodiment, the case where the blocks are turned on is described, but as an exception, the scale value (34) of 100
In the blocks before and after (%), even if you move to the block after 100 (%), the indicator (3
All of the 3L _{n-4 to} 33L _n ) may be left lit, and the display color may be changed for each block to call the attention of the monitor.

EFFECTS OF THE INVENTION As described above, according to the present invention, the end portion of the display unit group for demand power is extended from the end portion of the display unit group for time period, that is, the position corresponding to the expiration position of the demand time period. Since it is provided, there is an effect that it can be easily determined whether the demand power exceeds the target value. Further, since each display group is turned on for each block, there is an effect that power consumption and heat generation can be suppressed, and the entire apparatus can be downsized.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing a power demand monitoring device according to an embodiment of the present invention, FIG. 2 is a front view showing a display group of the device, and FIG. 3 is a conventional power demand monitor. FIG. 4 is a perspective view showing the monitoring device, and FIG. 4 is a block diagram showing the conventional device. In the figure, (26) is a display group driving means, (33L) is a power demand display group, (43L) is a time limit display group, (5
1) is a power meter with a transmitter. The same reference numerals in each figure indicate the same or corresponding parts.

Claims (1)

[Claims] 1. A display group for displaying the elapsed time of a demand time period, which is substantially linearly arranged, and a power consumption amount in the demand time period based on the number of pulses emitted from a watt hour meter. Is displayed, and the display start side end is aligned with the display start side end of the time display unit and is arranged substantially linearly, and the other end corresponds to the other end of the display unit. Demand power that includes a display group for demand power that is extended from the position where the display unit is driven, and display group driving means that drives each block obtained by dividing each display group into a predetermined number Monitoring equipment.