JPS5824840B2 - Data display - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a data collection device that uses a power distribution system to call a terminal device from a solid device via a relay device to collect data on meter readings of customers.

Conventionally, when using a power distribution system, a solid device calls a terminal device via a relay device to collect data on meter readings from customers, first the desired relay device is called by a call signal from the solid device, and then the relay device There is a device that sequentially calls terminal devices and receives their data signals and sends them back to the solid device.3 However, in such conventional devices, even if there is a terminal device that does not require data return, only that data signal is sent back to the solid device. The only way to eliminate this data return is to set it on the relay device side in advance, and it is impossible to do it on the solid device side as needed.

The present invention has been made in view of the above circumstances, and is a data collection system that enables emergency control and data collection by using a solid device to eliminate data returns from a terminal device as necessary. The purpose is to provide a collection device.

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

That is, FIG. 1 shows a system configuration diagram according to the present invention, and CE in the figure is a solid device installed in a business office or the like, and includes a central processing unit and a transmitting/receiving device therein.

A relay device RFP installed on a utility pole or the like together with a pole-mounted transformer is connected to this solid device CE via a transmission line constituted by a communication line or a high-voltage distribution line of a power distribution system.

(Although only one relay device is shown in Figure 1, in reality,
A plurality of them are arranged radially when viewed from the solid device CE.

) In this case, each relay device REP operates as a simple amplifier, and outputs the calling signal of the solid device CE as its own signal B, as shown in (1) and (2) in Fig. 4. It is.

Further, a plurality of consumers, that is, a group of terminal devices SUB are connected to this relay device REP using a low-voltage power distribution line of a power distribution system as a transmission path.

In this case, each terminal device NULL/N (L2°-Nan) has a unique address of multiple digits, for example, 6 digits, as shown in FIG. 2 (1).

Among them, the upper four digits [A in Figure 2 (2)] are the common address corresponding to the paging signal of the solid equipment CE (terminal - general paging signal, special group address), and the remaining two digits (101st digit, 100
response data (second digit) as the terminal device individual address.
Since the common address of the calling signal has four digits (105 to 102) assigned to it, each relay device has an address from 0001 to 9999. An arbitrary address is assigned from among them.

In reality, all addresses from 0001 to 9999 are not assigned to each relay device, and the design is such that there are always empty addresses.

This address is assigned to the meter reading function stop message MD, which will be described later.

After receiving the paging signal, the terminal device SUB returns the terminal data in a time-sharing manner after a predetermined idle time (signal non-output time) to, and also returns the terminal data during the idle time t.

When the meter reading function stop signal ζf arrives from the solid device CE within the period ζf, the subsequent return of response data is forcibly blocked.

In other words, to explain a specific example of this terminal device SUB according to FIG. 3, CPL is a low voltage coupling circuit connected to the low voltage distribution line on the relay device REP side, and DEM is a low voltage coupling circuit connected to the low voltage distribution line on the side of the relay device REP. a demodulation circuit that demodulates;
TIM is a timing circuit that generates a timing clock signal for the logic circuit system based on the input code of the demodulation circuit DEM.

This timing circuit TIM is connected to each terminal device Nα1 to Nα(
The activation time (time from receiving signal A to returning each signal C) is set separately for each kn.

REGl is a storage circuit that temporarily stores the input code of the demodulation circuit DEM that corresponds to the calling signal (A);
G2 is a storage circuit that temporarily stores the input code of the demodulation circuit DEM that corresponds to the meter reading function stop signal (D);
DETl is a first decoding judgment circuit, in which a common address corresponding to the above-mentioned calling signal A signal (A) in Fig. 4 is set in advance, and this set address is compared with the calling signal stored in the memory circuit REG1. , generates an output if the contents of both do not match.

DET2 is a second decoding determination circuit, which receives the meter reading function stop signal signal (D) in FIG. 4 sent from the solid device CE;
An output is generated when the preset contents match.

RES is a decoding determination circuit DET1. The memory circuits REG, , REG2 and the scan circuit S are energized by the output of DET2 and a scan completion signal of the scan circuit SCN, which will be described later.
A reset circuit that provides a reset signal to CN, SCN, is a scanning circuit that is activated at a time preset in the timing side path TIM, and is encoded by the encoding circuit ENC on the condition that there is no reset signal from the reset circuit RES. The meter reading is scanned and sent to the modulation circuit MOD.

In this case, the activation timing of the scanning circuit SCN set in the timing circuit TIM is determined by a predetermined idle time between the data signals (C) sent back from each terminal device to the relay device REP side, as shown in FIG. 4 (3). (signal non-sending time).

MOD is a modulation circuit that modulates the code string of the meter reading value from the encoding circuit ENC and sends it as a data signal to the relay device side via the low voltage coupling circuit CPL.

Next, the operation of the present invention configured as described above will be described. Now, when a terminal paging signal as shown in FIG. 4 (1) (A) is generated from the solid equipment CE, the relay equipment REP
A calling signal as shown in FIG. 4(2) is sent from the terminal SUB to all terminal devices SUB.

Then, each terminal device (Nα1...
In N(,n), as shown in FIG. 3, the input signal demodulated by the demodulation circuit DEM via the low voltage coupling circuit CPL is once stored in the storage circuit REG, and then sent to the decoding determination circuit DET.

Since the two match, the scanning circuit SCN is activated at the time preset in the timing circuit TIM, and the encoded meter reading value from the encoding circuit ENC is sent to the modulation circuit. It is applied to the low voltage coupling circuit CPL via MOD and sent to the relay device REP side.

In other words, when each terminal device SUB determines the calling signal, it outputs Nll, N[L2'' as shown in FIG.
Data signals are generated in the order of Nan and sent back to the solid device CE via the relay device REP.

Of course, in this case it's a relay device. The time-divided data signals returned to the REP side have a predetermined idle time (signal non-transmission time) to between the signals, as shown in FIG. 3(3).

Next, if you want to stop returning data from the nth terminal device onwards from this state, the n1th terminal device.

Free time t after SUB take return.

Figure 4 (1) from the solid equipment CE at the same time as
When a meter reading function stop signal as shown in (D) is generated, in the n-th terminal device Nαn, as shown in FIG.

be remembered.

Then, the decoding determination circuit DET2 compares the contents with the preset contents, but in this case, since the two match, an output is issued to the reset circuit RES, and the reset circuit RES
A reset signal is issued from the memory circuit REG1. REG
2 and the scanning circuit SCN are also reset to prevent data return.

As described above, according to the present invention, in a system in which a solid device CE calls a terminal device SUB via a relay device REP using a power distribution system to collect meter reading data from a customer, the terminal device SUB is connected to the relay device REP. Each terminal device SU
B is a common address (
group address) and individual terminal address, and operate the terminal devices SUB all at once with a call signal from the solid device CE to send back data in a predetermined time division. A predetermined idle time t.

and secure this free time t. The solid device CE is
Since the meter reading function stop signal is given to the terminal device SUB independently of the calling signal and the response signal to prevent the data from being returned all at once, the solid device CE can send data from the terminal device SUB as necessary. Returns can be eliminated, and interrupt processing can be performed much more efficiently than in the past, where this type of operation was not possible.

As explained above, according to the present invention, it is possible to eliminate data return from a terminal device as necessary using a solid device, and to quickly perform control and data collection required in the event of an emergency situation. It is possible to provide a highly reliable data collection device that can perform

[Brief explanation of the drawing]

Fig. 1 is a system diagram showing an embodiment of a data collection device according to the present invention, Fig. 2 is a data format diagram used in the embodiment, and Fig. 3 is a specific example of a terminal device used in the embodiment. The block diagram and FIG. 4 are time charts for explaining the same embodiment. CE...Solid equipment, REP...Relay device, SUB...One terminal device, CPL...Low voltage coupling circuit, DEM...Demodulation circuit , TIM...
...timing circuit, REGl, REG2... river...
Memory circuit, DETl/DET2...Decoding judgment circuit, RES...Reset circuit, SCN...
-・Scanning circuit, ENC・・・Encoding circuit, MOD
...Modulation circuit.

Claims (1)

[Claims] 1 A solid device, a relay device, and a plurality of terminal devices are connected by a distribution line of a power distribution system as a transmission path, and a plurality of terminal devices are connected as a group from the solid device via the relay device. In a data collection device that collects customer meter reading data by calling a group of terminal devices for each group, a call signal common to each terminal device in the group of terminal devices, a call signal predetermined by each terminal device, Said transmitting a time-division signal consisting of a signal corresponding to the time when the meter reading data signal of each terminal device should be input and a meter reading function stop signal that is output in the vacant time between the times when the meter reading data signal should be input. For a solid device, a low voltage coupling circuit connected to a distribution line receives the time-sharing signal and sends the meter reading data signal to the distribution line within a time when the meter reading data signal is to be input; a demodulation circuit that is connected to the circuit and demodulates the received time-division signal; a first storage circuit that is connected to the output of the demodulation circuit and stores the call signal in the output signal; a first decoding determination circuit that is connected and sends a signal when the stored call signal does not match a preset content; and a meter reading function stop signal that is connected to the output of the demodulation circuit and is included in the output signal. a second memory circuit that stores a second memory circuit; a second decoding determination circuit that is connected to the second memory circuit and sends a signal when the stored meter reading function stop signal matches a preset content; a scanning circuit that scans the meter reading signal encoded by the encoding circuit; a modulation circuit that modulates the meter reading signal output from the scanning circuit into the meter reading data signal and inputting the meter reading data signal to the low voltage coupling circuit; a reset circuit that resets the first and second storage circuits and the scanning circuit by at least one of the signals from the first and second decoding determination circuits; Outputting an activation signal to the storage circuit of =1 during the call signal generation time, outputting an activation signal to the second storage circuit during the idle time, and activating the scanning circuit during the time when the meter reading data signal is to be input. A data collection device characterized in that each of the terminal devices includes a timing circuit for outputting a signal.