JPS6275800A - Load surveying system - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a road survey system that measures the power consumption 6 etc. of each electrical device used at home, in buildings, factories, etc. at regular intervals.

[Technical background of the invention]

There are many types of electrical equipment used in general households, ranging from large equipment such as air conditioners and electric refrigerators to small equipment such as tape recorders and dryers. The amount is measured in bulk using an electric power daily meter. However, in recent years, there has been a demand for grasping the power usage status of each electrical device in a sampling manner in order to predict power demand trends. For this reason, conventionally, a system as shown in FIG. 7 is used to grasp the amount of power used. That is, in this system, a power usage meter 3 is connected to the power supply cord 2 of the electric refrigerator 1 as an electric device to measure the amount of power used. In addition, this power usage meter 3
has a configuration as shown in Fig. 8, in which a W/F converter (power-frequency converter) 3-1 is connected to the power supply cord 2, and from this a frequency signal proportional to the amount of electricity used by the refrigerator is output. It is sent to counter 3-2. Then, by sending out a time signal from the time clock section 3-3, the counter 3-
The count value of 2 is sent to the memory 3-4 and stored therein. At this time, counter 3-2 is cleared, so memory 3
-4, a count value corresponding to the amount of power used for each fixed time period is stored as usage data in order from the address with the smallest address. Then, for a certain period of time, for example, every month, the staff member carries the data collection 1ff4 and uses it as a power usage meter 3.
By connecting to the connector 3-5 of the data sending control unit 3-6, the usage data is transferred to the data collection device f1
Moved to 4. In this way, usage data for each electrical device is collected.

[Problems with background technology]

However, the above system has the following problems.

That is, ■The power usage meter 3 must include a W/F converter 3-1, a counter 3-2, a timer 3-3, a memory 3-4, and a data transmission controller 3-6. Therefore, it cannot be made small and inexpensive, and the cost becomes considerably high when data is collected from a large number of electrical devices.

(2) Furthermore, the data collection work must be performed for each power consumption meter 3, which is time-consuming.

(2) Furthermore, since the transmission timings of the time limit signals between the power usage 1ift measuring instruments 3 do not match, there is no temporal coincidence between the usage amount data of each electrical device.

[Purpose of the invention]

The present invention has been made based on the above-mentioned circumstances, and its purpose is to provide a compact and economical road survey system that can easily collect usage data with matching time limits.

[Summary of the invention]

The present invention has a function of sending a synchronization signal from 11 machines to each slave machine through a power distribution line, and sequentially receiving and counting each weighing signal from each slave machine, and each slave machine transmits a synchronization signal to each slave machine through a power distribution line, and sequentially receives and counts each weighing signal from each slave machine. This is a road survey system that has a function of receiving a signal and transmitting the measurement signal at different transmission timings determined for each power frequency cycle that arrives later.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is an overall configuration diagram of the road survey system.

In the figure, reference numeral 10 denotes a parent device, and slave devices 12-1 to 12-n are connected to this parent device 1110 via a power distribution 111. The master unit 10 sends a synchronization signal to the Kaneko units 19112-1 to 12-n at intervals according to the number of slave units 12-1 to 12-n.
A function that counts each slave unit 12-1 to 12-n while detecting the power frequency of the distribution line 11 by receiving the measurement signal sent back from each slave unit 12-1 to 12-n at the same time. It is something that has. Specifically, the configuration is as shown in FIG.
01 and a power transformer 102 are connected. The data injection transformer 101 has a function of superimposing a synchronization signal on the power waveform of the power distribution line 11 and extracting a measurement signal superimposed on the power waveform. A weighing signal receiving section 103 and a synchronizing signal transmitting section 104 are connected to the other side of the transformer 101, and these measuring signal receiving section 103 and synchronizing signal transmitting section 104 are
Signals are exchanged with 05.

The power transformer 102 also includes a half-wave rectifier diode 1.
06 and a rectifier circuit 107 are connected, and the half-wave rectified signal from the half-wave rectifier diode 106 is shaped into a clock signal by the waveform shaping circuit 108 and sent to the main control section 105. The main control unit 105 also receives a time signal from a time clock unit 109.
As a result, the main control unit 105 transmits the weighing signals from each slave unit 12-1 to 12-n to each slave unit 12-1 according to the gel clock signal.
.about.12-n and counted, and each count value is stored in the memory 110. FIG. 3 is a specific configuration diagram of the main control section 105, in which the counter 1
05a and a shift register 105b are provided, and clock signals are input to the ck input terminals of each. After dividing the clock signal by a predetermined number, the counter 105a sends out a high level signal, that is, a synchronization signal, from the Qn output terminal, and sends this to the shift register 105b and the synchronization signal sending section 104. The shift register 105b sequentially sends high-level signals from the Q1 to Qn output terminals to each AND gate G1 every time it receives a clock signal.
-G8 to sequentially open the gate, and is cleared by a synchronization signal. Further, a data receiving section 103 is connected to other terminals of these AND gates G1 to G8. Counters 1 to 8 are connected to the output ends of the AND gates G1 to G8, respectively, and these counters 1 to 8 are connected to the memory 110 via data lines DL. Note that SL is a time signal line. Reference numeral 111 denotes a data sending interface, which is used to send unused data to a recording device or data transmission means (not shown).

On the other hand, the slave unit 12-1-12-n uses the power used by each night alarm, such as the television 13-L light 13-2, the refrigerator 13-3, and other electric start devices 13-4...13-n. This device detects the weight and sends out a weighing signal proportional to this.
, . . . The sending timing data is set in advance according to the order, and the sending timing is determined by detecting the power supply frequency from the time the synchronizing signal is received from the base unit 10, and the weighing signal is sent out at this sending timing. It has Specifically, the configuration is as shown in FIG. 4, in which a current transformer (CT) 201, a voltage transformer (PT) 202, a data injection transformer 203, and a power transformer 204 are connected to the distribution line 11. There is. A voltage signal proportional to the consumption current output from CT2O1 and Pr2O3
The voltage signal proportional to the ii power supply voltage output from is W,
/F converter 205 to obtain power, and a frequency signal proportional to this power is sent to counter 206.

Further, a measurement signal transmitting section 207 and a synchronizing signal receiving section 208 are connected to the data injection transformer 203, and the synchronizing signal received by the synchronizing signal receiving section 208 is transmitted to the integrating circuit 203.
9 and is sent to the clear terminal clr of the counter 210.

A clock signal is input to the ck terminal of this counter 210, and this clock signal is obtained by shaping a half-wave rectified signal from a half-wave rectifying diode 211 connected to a power transformer 204 by a waveform shaping circuit 212. Created.

Reference numeral 213 is a handset number setting section in which handset number data as transmission timing data is set. Note that this handset number data is “1” in the handset 12-1.
", r2J on handset 12-2, "3" on handset 12-3,
.... This child number data is stored in the match detection circuit 214.
This circuit 214 sends a high-level match signal to the ck input terminal of a D-type flip-flop 215 when the handset number data and the count value of the counter 210 match. Then, at the timing of sending this coincidence signal, the frequency-divided output signal of the counter 206 is sent to vAello as a measurement signal. That is, the frequency-divided output of the counter 206 is sent to the ck input terminal of the D-type flip-flop 216, and a signal of a corresponding level is output from the Q output terminal and input to the D input terminal of the D-type flip-flop 215. and,
The signal from the Q output terminal of this flip-flop 215 is sent as a trigger signal to the trigger terminal tg of the monostable multivibrator 217, and the output signal of this monostable multivibrator 217 is sent to the weighing signal transmitter 207. ing. In addition, monostable multivibrator 2
The output signal of the monostable multivibrator 217 is input as a trigger signal to each flip-flop 215.2.
It is supposed to clear 16. In addition, 219 is a rectifier circuit, and in FIG. 1, 14 is a distribution board, 15
is a filter that prevents leakage of used data to the outside.

Next, the operation of the system configured as described above will be explained. It is assumed that eight slave devices are connected. Parent 11
At 0, the power supply waveform is sent by the half-wave rectifier diode 106 as a half-wave rectified signal S as shown in FIG. 5 to the waveform shaping circuit 108, where it is shaped into a lock signal CP. This clock signal CP is sent to a shift register 105a and a counter 105b, and when the counter 105b counts up to a predetermined value (here, there are 8 slave units), it outputs a synchronization signal 2. This synchronization signal Z is superimposed on the power waveform E from the data injection transformer 101 by the synchronization signal transmitter 104. In other words, as shown in FIG.
When Domeishin @Z is output, this is superimposed on the power supply waveform E. In addition, when the synchronization signal 2 is superimposed, it is superimposed for a period slightly longer than the (1/4) period. Therefore, in Kaneko 1112-1 to 12-n, the synchronization signal Z is transmitted to the data injection transformer 203 and the synchronization signal receiving section 2.
08 and the integrating circuit 209 to the clear terminal clr of the counter 210. Therefore, at this time, Kaneko 11
The counters 210 of 2-1 to 12-n are cleared. Thereafter, each counter 210 starts counting upon receiving a clock signal @CP synchronized with the clock signal CP. This count value is then sent to the coincidence detection circuit 214 and compared with the slave unit number data of the slave number setting section 213. Here, since the handset number data "1" is set in the handset 12-1, when the count value becomes "1", the match signal H
is sent out, and a weighing signal is sent out during the period C1 shown in FIG. In other words, from the Qn output terminal of the counter 206, W/
Count the frequency signal from the F conversion unit 205 and keep τ constant m
It outputs high-level and low-level signals alternately each time the signal changes. In this state, ck of 7 lip-flop 215
When a match signal H is input to the input terminal, if a high level signal is output from the Q output terminal of the flip knob 216, a high level signal is simply output from the Q output terminal of the flip knob 215 as a trigger signal. 1 of the stable multi-by-break 217 is sent to the trigger terminal. As a result, a high level signal is sent to the weighing signal transmitter 207,
As a result, a ^1m signal @M1 as shown in FIG. 6 from the data injection transformer 203 is superimposed on the period C1. and,
When a high level signal is applied to the trigger terminal of the monostable multivibrator 218, each of the seven lip flops 215.21
6 is cleared. Note that if the output signal of the counter 206 is at a low level, no superimposition is performed.

Next, the count value of the counter 210 of the handset 12-2 is “2”.
”, it matches the handset number data, so a match signal H is sent.
is sent out, and thus, similarly to the secondary operation, a metering signal M2 is sent out in period C2.

Therefore, for each cycle of the N source frequency, each slave unit 2-
1 to 12-n sequentially send out the metering messages @M1 to M8. In other words, during the period C3, the control signal M of the IJ slave unit 12-3
3. In the period C4, the measurement signal M4 of the child [12-4,...
It is.

On the other hand, the shift register 105b of the parent device 10 is cleared at time t1, and from this time on, it receives the clock signal CP again and sequentially outputs high-level signals from the Q1 to Qn output terminals. As a result, the AND gates G1 to G8 are sequentially closed. In other words, AND gate G1 opens during period C1,
The AND gate G2 opens during the period C2, the AND gate G3 opens during the period C3, and so on.

Therefore, when the measurement signal Mi''-M8 from -12-n is received by the measurement signal receiving unit 103 via the data injection transformer 101 to the child 112-1
The h-view signal M1 is sent to the counter 1, and the child gll 2
-2's weighing signal M2 is not sent to counter 2, . . . weighing signal M8 of slave unit 12-8 is sent to counter 8.

Thus, each electrical device 13 is assigned 1 to 8 to each counter.
-1-13-n power consumption is calculated. Note that the count values of 1 to 8 on these counters are stored in the memory 110 as usage data in response to a time signal. Thus, the recording device is connected to the terminal 16 at regular intervals to transfer usage data.

In this way, in the above embodiment, the synchronization signal 7 is distributed from the master valve 10! Each slave unit 12-1 to 12- through the line 11
The slave units 12-1 to 12-n receive this synchronization signal Z.
Based on the detection of the power frequency of power distribution B11 from the time when the signal is received, the order of sending out the weighing signals of each Ryoiso is determined.
After determining whether the timing is right, the Kaneko 1fi 12-1 to 12-n sequentially send out weighing signals M1 to M8, and the parent R10 sequentially receives these weighing signals M1 to M8 to each device 13-1 to 12-n.
Since the in-use data is determined by counting each 1112-n, there is no need to use a power consumption measuring device as in the past, making it possible to downsize Kaneko 1112-1 to 12-n and further reduce costs. The reduction can be measured. In addition, each electrical equipment 13-1~
13-n usage data is collectively stored in the base unit 10, data collection work is facilitated, and usage data for each electrical device is stored in the base unit 10 and slave units 12-1 to 12-.
Since they are synchronized by detecting the power supply frequency, they can be assumed to coincide in time. Note that the synchronization signal Z and the measurement signals M1 to M8 have different periods of superimposition on the power supply waveform, so there is no possibility of false detection.

Note that the present invention is not limited to the above-mentioned embodiment, and may be modified without departing from the spirit thereof. For example, the synchronization signal and the measurement signal may be distinguished from each other by using different frequencies to be superimposed. Alternatively, the high level and low level of the measurement signal may be distinguished by different frequencies and superimposed on the power supply waveform. This results in child 111
2-1 to 12-n can be detected.

〔Effect of the invention〕

As described in detail above, according to the present invention, it is possible to easily collect usage data with matching time limits, and to provide a compact and economical road survey system.

[Brief explanation of drawings]

FIG. 1 is an overall configuration diagram showing an embodiment of the road survey system according to the present invention, FIG. 2 is a configuration diagram of the main unit of this system, and FIG. 3 is a specific configuration diagram of the main control unit in the MR. Fig. 4 is a block diagram of the handset of this system, Fig. 5 is a diagram for explaining the creation of a clock signal, Fig. 6 is a diagram for explaining the data transmission function in this system, Figs. FIG. 8 is a diagram for explaining a conventional data collection system. 10... Base unit, 101... Data injection transformer,
102...Power transformer, 103...Counter signal receiving section, 104...Synchronizing signal transmitting section, 105...Main i control section, 105a...Counter, 105b...Shift register, G1~ G8...and gate, 8 to K1-
...Counter, 108...Waveform shaping circuit, 109.
...Timer clock section, 110...Memory, 111...Data sending interface, 12-1 to 12-n-...Slave unit, 201-CT, 202...PT, 203...For data injection Transformer, 205... W/F conversion section, 20
7... Total signal transmitter, 208... Synchronous signal receiver, 210... Counter, 212... Waveform shaping circuit,
213... Handset number setting unit, 214... Coincidence detection circuit, 215.216... D type flip 70 tube, 21
7.218... Monostable multibibreak. Applicant's representative Patent attorney Takehiko Suzue 1 Figure 2 Figure 7

Claims (1)

[Claims] In a road survey system in which a master unit collects a measurement signal from a slave unit installed for each device through a power distribution line to measure the amount of electricity used by each device, the master unit transmits a synchronization signal to the power station through the distribution line. It has a function of transmitting to a slave unit and sequentially receiving and counting each weighing signal from each slave unit, and each slave unit receives and counts each measurement signal from each slave unit, and each slave unit receives and counts each measurement signal from each slave unit for each period of the power frequency that arrives after receiving the synchronization signal. 1. A road survey system characterized by having a function of transmitting the measurement signal at different transmission timings determined by the load survey system.