JP2538873B2 - Electricity measuring device - Google Patents

Description

TECHNICAL FIELD The present invention relates to an electric quantity measuring device for measuring the amount of electric power used by each electric device used at home.

[Conventional technology]

Electric appliances used in ordinary households include air conditioners,
There are many types of equipment, from large equipment such as electric refrigerators to small equipment such as tape recorders and dryers, but the amount of electricity used for these is measured collectively by a watt hour meter to calculate electricity charges. However, in recent years, there has been a demand for sampling-based grasp of the power usage status of each electric device in order to predict the power demand trend. Therefore, the 8th
The power consumption is grasped by the system shown in the figure. That is, this system measures the amount of electric power used by connecting the electric power consumption meter 3 to the electric power supply cord 2 of the electric refrigerator 1, for example, as an electric device. The power consumption measuring instrument 3 has a configuration as shown in FIG. 9, and the power supply cord 2 is provided with a W / F converter (power-frequency converter) 3-
1 is connected, and a frequency signal proportional to the amount of electric power used by the refrigerator is sent to the counter 3-2. Then, the time counting unit 3-3 sends a time signal to send the count value of the counter 3-2 to the memory 3-4 for storage. At this time, the counter 3-2 is cleared, so the memory 3-4
The count value corresponding to the amount of electric power used for each fixed time period is stored in order from the youngest address as the amount-of-use data. Then, a staff member carries the data collection device 4 for a certain period, for example, every month, and connects the data collection device 4 to the connector 3-5 of the power consumption measuring device 3 to operate the data transmission control unit 3-6. The usage data is transferred to the data collection device 4. Thus, the usage data of each electric device is collected.

[Problems to be solved by the invention]

However, the above system has the following problems. That is, in the above system, the power consumption measuring device 3
Is connected to each electric device on a one-to-one basis, so there is a difficulty in using the movable electric device such as a dryer or a cleaner. In other words, since these electric devices are used more often during the non-use time, even if the power consumption measuring instruments 3 are connected in a one-to-one manner, a large number of them are required, and most of the measuring instruments 3 are used. It has not been done.

Further, since it is difficult to reduce the size of the measuring instrument 3 itself beyond a certain limit, the presence of the measuring instrument 3 becomes troublesome when it is connected to an electric device. This is particularly relevant for mobile electrical equipment.

Therefore, an object of the present invention is to provide an electric quantity measuring device capable of efficiently measuring the electric quantity of a movable electric device in order to solve the above problems.

[Means for solving problems]

The present invention is realized by an identification element provided with an identification element of each electric device, and an identification attachment having a power plug receiving terminal of the electric device corresponding to the identification device and a power terminal for supplying electric power to the electric device, and the identification element. An electric quantity measuring device, which is provided with a measuring instrument that detects an identification electric signal and measures an electric quantity such as an electric power consumption amount for each electric equipment.

[Action]

According to the present invention, by providing each of the above means, the power plug of the electric device is connected to the identification attachment and power is supplied to the electric device through the identification attachment, and the identification electric signal appearing in the identification element in this state is transmitted. Upon receipt, the measuring instrument discriminates and judges the electric device and measures the amount of electricity.

〔Example〕

Hereinafter, a case where one embodiment of the present invention is applied to power amount measurement will be described with reference to the drawings.

FIG. 1 is an overall configuration diagram of the electricity quantity measuring device. In the figure, 10 is a data collector, and this data collector 10
Is connected to measuring instruments 12-1 to 12-n via a distribution line 11. The data collector 10 sends a synchronization signal to all the measuring instruments 12-1 to 12-n at every cycle according to the number of the measuring instruments 12-1 to 12-n.
To the measuring instruments 12-1 to 12-n and to receive the weighing signals returned from the respective measuring instruments 12-1 to 12-n. Specifically, it has a configuration as shown in FIG. 2, and a data injection transformer 101 and a power transformer 102 are connected to the distribution line 11. The data injection transformer 101 has a function of superimposing a synchronization signal on the power supply waveform of the distribution line 11 and a function of extracting a weighing signal superimposed on the power supply waveform. A weighing signal receiving unit 103 and a synchronization signal transmitting unit 104 are connected to the other side of the transformer 101, and the weighing signal receiving unit 103 and the synchronization signal transmitting unit 104 exchange signals with the main control unit 105. I am supposed to do it. Also, power transformer 10
A half-wave rectification diode 106 and a rectification circuit 107 are connected to 2, and a half-wave rectification signal S from the half-wave rectification diode 106 is connected.
Is shaped into a clock signal CP by the waveform shaping circuit 108 and sent to the main control unit 105. Further, the main control unit 105 is adapted to receive a timed signal from the timed time measuring unit 109, whereby the main control unit 105 can receive the clock signal C
According to P, the measuring signals from the measuring instruments 12-1 to 12-n are fetched and counted by the respective measuring instruments 12-1 to 12-n, and these count values are stored in the memory 110.

DL is a data line, SL is a timed signal line, and 111 is a data transmission interface.
This is for sending the usage data to a recording device or data transmission means (not shown).

On the other hand, the measuring instruments 12-1 to 12-n detect the amount of electric power used by each electric device, for example, the other electric device 13-n such as the revision 13-1, the refrigerator 13-2, the dryer 13-3, and the cleaner. A metering signal proportional to this is transmitted.

By the way, each of the measuring instruments 12-1 to 12-n has an appearance as shown in FIG. 3 and has power outlets 14-1 to 14- in the house.
n, and these measuring instruments 12-1
The connection of each of the electric devices 13-1 to 13-n to ~ 12-n is as follows. That is, each electric device 13-1 to 13
-N power plugs 15-1 to 15-n are connected to external appearance attachments 16-1 to 16-n as shown in FIG. And these identification attachments 16-1 to 16-
n is connected to the plug terminals 16a of the respective measuring instruments 12-1 to 12-n, and by such a connection, the electric devices 13-1 to 13-n are connected.
Power is supplied to.

Now, the identification attachments 16-1 to 16-n are
An identification resistor RS having a predetermined resistance value is provided inside each of the electric devices 13-1 to 13-n. Therefore, these identification attachments 16-1 to 16-n are attached to the respective power plugs 15-1 to 15-n in a semi-fixed state, and are particularly movable such as the dryer 13-3 and the vacuum cleaner 13-n. In such electrical equipment, the power source plugs 15-3 and 15-n are integrated with the measuring instruments 12-3 and 12-n, and are withdrawn.

Therefore, in addition to the function of detecting the amount of electric power used by each of the electric devices 13-1 to 13-n, each of the measuring instruments 12-1 to 12-n has
It also has a function of receiving the identification voltage signal of the voltage drop appearing by the identification resistor RS and identifying the electric devices 13-1 to 13-n. Specifically, the structure is as shown in FIG. 5, and the plug 17 is inserted into the power outlets 14-1 to 14-n.
A current transformer (CT) 201, a voltage transformer (PT) 202, a data injection transformer 203 and a power transformer 204 are connected to the. The voltage signal proportional to the consumption current output from CT201 and the voltage signal proportional to the load voltage output from PT202 are sent to the W / F conversion unit 205 to obtain electric power, and a frequency signal proportional to this electric power is obtained. It is sent to the counter 206.

Further, the data injection transformer 203 is connected to the weighing signal transmitting unit 207 and the synchronization signal receiving unit 208, and the synchronization signal received by the synchronization signal receiving unit 208 passes through the integrating circuit 209 to the clear terminal clr of the counter 210. It will be sent. The clock signal CP 'is input to the ck terminal of the counter 210. The clock signal CP' is a half-wave rectification signal from the half-wave rectification diode 211 connected to the power transformer 204. Formatted by 212 and created.

Now, reference numeral 300 denotes an electric device identification section, which detects the voltage level of the identification voltage signal created by the identification resistor RS, and when the identification number based on this voltage level and the count value of the counter 210 match. It has a function of sending the frequency-divided output signal of the counter 206 to the data collector 10 as a weighing signal. Specifically, the reference voltage of the reference voltage generator 301 is supplied to the identification resistor RS through the resistor 302. Then, the identification voltage signal by this is sent to the A / D converter 303, and the identification voltage signal is converted by this A / D converter 303 into an identification number according to the voltage level and sent to the coincidence detection circuit 304. It has become. The match detection circuit 304 sends a high-level match signal H to the ck input terminal of the D-type flip-flop 215 when the identification number and the count value of the counter 210 match. The AND gate 305 detects that the high-order bit of the output value of the A / D converter 303 becomes high level when the electric devices 13-1 to 13-n are not connected and clears the counter 206. ing. This is each electric equipment 13-1 to 13-n
Electrical equipment that was connected before the replacement 13-1 to 13
This is to prevent the count value of -n from remaining.

On the other hand, the frequency-divided output of the count 206 is sent to the ck input terminal of the D-type flip-flop 216, and a signal of a level corresponding to this is output from the Q output terminal and sent to the D-input terminal of the D-type flip-flop 215. It has become so. Then, the signal from the Q output terminal of the flip-flop 215 is sent as a trigger signal to the trigger terminal tg of the monostable multivibrator 217, and the monostable multivibrator is transmitted.
The output signal of 217 is sent to the weighing signal transmitting unit 207. The output signal of the monostable multivibrator 217 is input as a trigger signal to the monostable multivibrator 218 to clear the flip-flops 215 and 216. Reference numeral 219 is a rectifying circuit, 14 in FIG. 1 is a distribution board, and 15 is a filter for preventing leakage of usage data to the outside.

Next, the operation of the apparatus configured as described above will be described. It is assumed that eight measuring instruments 12-n are connected.
In the data collector 10, the power waveform is a half-wave rectifier diode
At 106, the half-wave rectified signal S as shown in FIG. 6 is sent to the waveform shaping circuit 108 and shaped into the clock signal CP. The clock signal CP is counted by the main control unit 105, and when the count value becomes "8", the synchronizing signal Z is output. This is because there are eight measuring instruments 12-1 to 12-n. The synchronization signal Z is superimposed on the radio wave waveform E from the data injection transformer 101 by the synchronization signal transmission unit 104. That is, as shown in FIG. 7, when the synchronization signal Z is output at time t1, this is superimposed on the power supply waveform E. When the synchronization signal Z is superimposed, it is superimposed for a period slightly longer than the (1/4) cycle. This synchronizing signal Z passes through the distribution line 11 and each measuring device 12
-1 to 12-n are transmitted to each measuring instrument 12-1 to 12-n.
In 12-n, the synchronization signal Z passes through the data injection transformer 203, the synchronization signal receiving unit 208, and the integrating circuit 209, and the counter 21.
Sent to clear terminal clr of 0. Therefore, at this time, the counters 210 of all the measuring instruments 12-1 to 12-n are cleared. After that, each counter 210 receives the clock signal CP ′ synchronized with the clock signal CP and starts counting. Then, this count value is sent to the coincidence detection circuit 304.

By the way, an identification number according to the voltage level of the identification voltage signal appearing by the identification resistor RS is added to the coincidence detection circuit 304. Here, for example, if the identification number by the identification resistance RS of the attachment 16-1 for identification is “3”, the coincidence detection circuit 304 of the measuring instrument 12-1 is the counter 210.
When the count value of 3 becomes "3", the high-level coincidence signal H is transmitted. That is, the coincidence signal H is transmitted during the C3 period shown in FIG. As a result, the weighing signal is sent to the data collector 10 in the C3 period. That is, counter 20
From the Qn output terminal 6, the high-level signal and the low-level signal are alternately output every time the frequency signal from the W / F conversion unit 205 is counted and becomes a constant value. When the coincidence signal H is input to the ck input terminal of the flip-flop 215 in this state, if a high-level signal is output from the Q output terminal of the flip-flop 216, the high-level signal is output from the Q output terminal of the flip-flop 215. Is sent to the trigger terminal of the monostable multivibrator 217 as a trigger signal.
As a result, a high level signal is sent to the weighing signal transmitting unit 207, and the weighing signal M3 as shown in FIG. 7 is superimposed on the period c3 from the data injection transformer 203. Since the high level signal is applied to the trigger terminal of the monostable multivibrator 218, the flip-flops 215 and 216 are cleared. If the output signal of the counter 206 is low level, superimposition is not performed.

Therefore, for example, the measuring instrument 12-1 has the identification number “3”, the measuring instrument 12-2 has the identification number “1”, the measuring instrument
If it is determined that the identification number is “2” in 12-3, the weighing signal is transmitted from the measuring instrument 12-2 in the c1 period, from the measuring instrument 12-3 in the c2 period, and from the measuring instrument 12-1 in the c3 period. Will be done.

On the other hand, from the time t1, the master device 10 first measures the measurement signal M2 of the measuring instrument 12-2, then measures the measurement signal M3 of the measuring instrument 12-3, and further measures
The weighing signal M1 of 12-1 ... The weighing signal M8 of the slave unit 12-8 is fetched every cycle and stored in the memory 110. Thus, the electric power consumption of each electric device 13-1 to 13-n is obtained. Then, the recording device is connected to the terminal 16 and the usage data is transferred at regular intervals.

As described above, in the above embodiment, the electric device 13-1
To 13-n power plugs 15-1 to 15-n are connected to the identification attachments 16-1 to 16-n, and the electrical device 13- is connected through the identification attachments 16-1 to 16-n.
1 to 13-n are supplied with electric power, and in this state, the measuring instruments 12-1 to 12-n discriminate and judge the electric devices 13-1 to 13-n by receiving the discriminating electric signal appearing in the discriminating element RS. Since the amount of power used is measured, the dryer 13-3 and vacuum cleaner 13
By connecting only when a movable electric device such as -n is used, the amount of electric power used can be easily measured. Moreover, since the measured power consumption is in the same state as being monitored by the synchronization signal Z from the data collector 10, the simultaneity of the power consumption data in grasping the actual power consumption is not lost. become. Furthermore, it does not interfere with the use of movable electric devices.

Further, the measuring instruments 12-1 to 12-n have a simple configuration, and since data transmission is also performed by power line carrier, there is no need for wiring and the like, and the cost can be reduced.

It should be noted that the present invention is not limited to the above-described embodiment, and can be modified without departing from the spirit of the invention. For example,
The power consumption data may be obtained by the measuring instruments 12-1 to 12-n and stored simultaneously.

Further, not only the amount of power used but also the amount of reactive power, the phase difference, the power factor, etc. may be obtained from each voltage signal from CT201, PT202.

〔The invention's effect〕

As described above in detail, according to the present invention, it is possible to provide an electric quantity measuring device capable of efficiently measuring the electric quantity of a movable electric device.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram showing an embodiment in which an electricity amount measuring device according to the present invention is applied to power consumption measurement, FIG. 2 is a configuration diagram of a data collector of the present invention device, and FIG. 3 is a measuring instrument. 4 is an external view of the attachment for identification, FIG. 5 is a specific configuration diagram of the measuring instrument, FIG. 6 is a diagram for explaining generation of a clock signal, and FIG. 7 is a device of the present invention. And FIG. 8 and FIG. 9 are views for explaining the conventional data collection system. 10 …… Data collector, 101 …… Data injection transformer, 1
02 …… Power transformer, 103 …… Weighing signal receiving unit, 104 ……
Synchronous signal transmission unit, 105 ... Main control unit, 108 ... Waveform shaping circuit, 109 ... Time measurement unit, 110 ... Memory, 111 ... Data transmission interface, 12-1 to 12-n ... Measuring instrument, 20
1 …… CT, 202 …… PT, 203 …… Data injection transformer, 2
05 …… W / F converter, 207 …… Weighing signal transmitter, 208 …… Synchronous signal receiver, 210 …… Counter, 212 …… Wave shaping circuit, 215,216 …… D flip-flop, 217,218 …… Monostable Multivibrator, 300 ... Electrical equipment identification part, 301
…… Reference voltage generator, 303 …… A / D converter, 304 ……
Match detection circuit, 305 ... AND gate, RS ... Identification resistor.

Claims (1)

(57) [Claims] 1. An identification attachment provided with an identification element of each electric device, and having a power plug receiving terminal of the electric device corresponding to the identification element and a power terminal for supplying electric power to the electric device, and the identification. An electric quantity measuring device comprising: a measuring instrument that detects an identification electric signal appearing by an element and measures an electric quantity such as a power consumption amount for each of the electric devices.