JPS60208140A - Load survey system - Google Patents

Abstract

PURPOSE:To attain ease of data recovery of a terminal equipment by transmitting sequentially a standard time signal and a polling signal through a communication line from a central device to plural equipments, returning a timer data and a time signal from the terminal equipment and correcting the time. CONSTITUTION:The polling signal and the standard time signal are transmitted from a device main body 11 and a standard clock 12 of a central device 10 while an address of terminal equiments 20A, 20B... is added and modulated by an MODEM13 to a communication line 30. A terminal equipment 20i etecting the own address transmits a time signal of the clock provided to the terminal equipment and the number of pulses proportional to the value measured by the terminal equipment until that point of time to the central device 10. The central device 10 measures the pulse from the terminal equipment 20i, surveys the load and when the time signal is shifted from the standard time by a prescribed value or over, an alarm is raised and a maintenance personnel visits to the place for the repair of the terminal equipment 20i. Thus, the load is surveyed rationally. This system is suitable for metering job such as water supply or gas supply.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an improvement in a road survey system that collects timed data stored in a plurality of terminal bags flK.

[Technical background of the invention]

A road survey system is widely known as a system for investigating the amount of electricity, gas, water, etc. used within a predetermined period of time. This is a time-limited data (
Conventionally, these terminal devices include a power conversion circuit that converts the load power into an f pulse number proportional to the load power consumption, and a power conversion circuit that counts the output pulses of this power conversion circuit. It consists of a counting circuit for counting, a memory for storing count values for each fixed time period, an output control circuit for outputting the contents of this memory to the outside, and a clock circuit for ticking the time period.

The time-limited data of these terminal devices is collected by a data collector who visits each terminal device at regular intervals (for example, once every two months) by connecting a portable cassette recorder separate from the terminal device. The collected data is processed by a computer and used for an electric power load survey.

By the way, each of the above-mentioned terminal devices has a built-in clock circuit, but these clock circuits are often affected by temperature, electric power, etc. and the time becomes incorrect. There is a problem that cannot be grasped accurately. Therefore, when collecting data, the collecting staff supplies current time data from the cassette recorder to the terminal device to correct the time.

[Problems with background technology]

However, the system configured as described above has various drawbacks as follows.

(1) Data from each terminal device must be collected while carrying several cassette recorders, making the data collection work complicated and tiring.

(2) After storing the standard time by -1 in each cassette recorder, the procedure is to supply a time signal for time adjustment to each terminal device, so it is necessary to always carry a standard time adjustment clock. there were.

(3) Since the time of each terminal device is adjusted in the order of standard clock → cassette recorder → terminal device, if the clock accuracy of each device is not high, errors will occur when the time is adjusted.

(4) Since data collection is done by collection staff, as the number of terminals increases, labor costs increase and it is not efficient.

(5) Since data is collected every fixed period, once the clock goes out of order, the data from the data collection date to the next data collection date becomes invalid.

[Purpose of the invention]

The present invention has been made with attention to the above points, and it is possible to easily adjust the clock of each terminal device to an arbitrary time, and moreover, it is possible to select each terminal device and transfer data without any manual intervention. The purpose of the present invention is to provide a road survey system that can automatically collect data.

[Summary of the invention]

The present invention includes a standard clock in a solid device, which selects a desired terminal device by sending out a standard time signal and a polling signal, and also adjusts the time of the clock circuit of the terminal lid. , the selected terminal device uses the time signal before time adjustment as a return signal and sends the time limit data with time adjustment to the solid device, and this solid device uses the time signal before time adjustment from the terminal device and the standard This is a road survey system that grasps the difference with the time signal and takes necessary measures when necessary.

[Embodiments of the invention]

Hereinafter, one embodiment of the present invention will be described with reference to FIGS. 1 to 4. FIG. 1 is a schematic diagram of the entire system, FIG. 2 is a block diagram of a terminal device, and FIGS. 3 and 4 are diagrams of transmission procedures and transmission formats. This system consists of a solid device 10 and a plurality of terminal devices 201゜2.
These terminal devices 20A consist of 0B...

20B... are connected using communication lines 30 such as telephone lines and low-voltage distribution lines derived from the solid device 10.

The solid device 1o includes a device main body 1 that includes a built-in computer, etc., a standard clock 12 that clocks and outputs standard time, a modulation/demodulation circuit 13 that modulates and demodulates transmission signals (hereinafter referred to as a modem), etc. It is configured to send out terminal calling addresses, polling signals with control codes, standard time signals, etc.

In each terminal device 20, 20B... are configured as shown in FIG. In FIG. 2, No. 2 is a power conversion circuit that obtains electric power by multiplying the load voltage vL and the consumption current ■, and this circuit 21 is a multiplication element that multiplies the load voltage ■1 and the consumption current IL, for example. , a power-frequency conversion circuit that converts the multiplied power into a number of pulses, and a frequency division circuit that converts the output of this conversion circuit into a number of pulses corresponding to the amount of power used. 22 is a counter that counts the output and pulse of the power conversion circuit 21, and this count value is calculated by the clock circuit 23.
The data is stored in the subsequent memory 25 at fixed time intervals based on designations input from the control circuit 24 at fixed time intervals. This clock circuit 23 always sends a current time signal and a time limit signal to a control circuit 24. Further, the control circuit 24
) from the solid device 10? - Receives the IJ signal and performs necessary control on each component, ie, the counter 22, the memory 25, the data conversion circuit 26, etc. This data conversion circuit 26 converts the parallel data from the memory 25 into serial data and transmits it to the communication line 30 via the modulation/demodulation circuit (hereinafter referred to as modem) 22. It has a function of converting input serial data into parallel data and inputting it to the control circuit 24. 28
is a terminal address setting section, which is the terminal address setting section of the terminal device 20A.
,,20B... each has a unique address,
The terminal address is read out upon receiving a command from the control circuit 24. Note that the terminal address setting section 28
The address setting means is a slide switch or jumper wire.

Next, the operation of the system configured as above will be explained. In the solid device 10, each terminal device 20A, 20B.
When collecting time-limited data stored in ..., the following procedure is used. First, the device main body 11 is
Calculator based on which sequence glodarum or oilator operation j? The standard time signal A from the IJ tongue S1 and the standard clock 12 is output, modulated by the modem 13, and then transmitted to the communication line 30 in the order shown in FIG. In fact, the data formatter from the solid device 10 is a standard data format including a transmission start code STX, a terminal calling address TAD, a control code CCD, for example, year, month, day, hour, minute, and second, as shown in FIG. It consists of a time signal A and a transmission completion code ETX.

When each terminal device 20 receives a signal with the above data format, JOB... is sent to the modem 27.
After demodulating in the data conversion circuit 26, the serial signal is further converted into a parallel signal, and the converted signal is sent to the control circuit 24
supply to.

Here, the control circuit 24 compares the terminal calling address and its own terminal address read from the terminal address setting section 28, and if they match, it sets its own terminal address TAD as shown in FIG. 3(b). The current time signal B of the clock circuit 23 is used as a return signal, and the data conversion circuit 26 performs a predetermined signal conversion, and the modem 27 modulates the signal and sends it to the solid device 1.
Transmit to 0.

Further, the terminal device selected by the solid device 1011C, for example 20A, sends out the current time signal B of the clock circuit 23 as described above, and then receives the standard time signal sent from the solid device 10 by the control circuit 24. A as clock circuit 23
The time is corrected by writing to .

On the other hand, when the solid device 10 receives the return signal from the terminal device 20A, it confirms that the terminal device 20k has been selected from the terminal address TAD, and also confirms that the terminal device 21) has the time signal B of A and the standard of the standard clock 12. It compares the time signal with the time signal, and if there is a time difference of more than a predetermined value, a warning signal is issued to notify the oiler. Here, a maintenance person goes to the installation location of the terminal device 20 and repairs or replaces the clock circuit 23.

Furthermore, when the first solid device 10 completes receiving the return signal, it sends the terminal calling address TAD and control code C to the terminal device 20k as shown in FIG.
A polling signal S2 consisting of OD is sent out.

Here, the terminal device 20 receives / from the solid device 10.
- Upon receiving the IJ signal S2, it is sent to the control circuit 24.
is input to the memory 25 under the control of the control circuit 24.
The time limit data (see FIG. 3(b)) is read out and transmitted to the solid device 10. Thereafter, the count value of the counter 22 for each time period is written into the memory 25 based on the standard time signal A sent from the terminal device 20AId and the solid device 10.
By the above procedure, each terminal device [20A, 20B,
Completed time adjustment and collection of timed data.

Therefore, according to the above configuration, a pooling signal is sent from the solid device 10 via the communication line 30, and one of the plurality of terminal devices 20A, 20B, . . . is selected to transmit time-limited data. Since it is configured to be collected, there is no need for collection personnel as in the past, and the collection work can be made more efficient and personnel can be used more effectively. Further, since the standard time signal is sent simultaneously with the polling signal for terminal selection to directly adjust the time of the clock circuit 23 in the terminal device, there is no problem of time adjustment deviation as in the prior art, and the time can be adjusted accurately. Also,
If time-limited data is collected from the solid device 1o every one to two weeks, failures will occur sooner even if data is missing during that period due to failure of the terminal device, and data reliability and data quality will be reduced. Collection rate improves. In addition, the terminal device 20A
, 20B, even if the time of the clock circuit 23 of the clock circuit 20B is incorrect due to the influence of temperature, voltage, etc., the incorrect time is collected by the solid device 1011C when data is collected. K may take the necessary measures. In addition, from the solid device 1o to the terminal device @20, 2
It is also possible to only adjust the time to 0B every short period (for example, several days), and the time error can be greatly reduced.

In addition, in the system of the present invention, for example, as shown in FIG. 5, a telephone line 30' is used to connect a solid device 10' and a terminal device 20.
′ may also be connected. In the figure, 31 is an exchange. That is, the solid device 10' includes the component 11 shown in FIG.
13, a central network control device 14 and a telephone 15 are provided on the output side of the modem 13. Terminal installation gM
20' is the original terminal device main body 31 (device 20 in FIG.
(corresponding to A...K), the terminal-side network control device 32, the telephone 33, etc. In this system, when a subscriber is called by a subscriber number, the exchange 3 calls the subscriber and connects the solid device 10' and the terminal device 20' which is the subscriber. After the line is connected, the operation is exactly the same as in FIG.

In addition, in the present invention, upon receiving the standard time signal and the f-ring signal from the solid device 10, the terminal side may correct the time of the clock circuit 23 after transmitting the time limit data. Also,
Although two polling signals are used, it is also possible to control all terminals with one polling signal.

〔Effect of the invention〕

As described in detail above, according to the present invention, it is possible to easily select a terminal device from a solid device at any time and collect time-limited data, and when collecting data, a standard time signal is sent at the same time as a pooling signal to the terminal device. Since the time of the device's clock circuit is adjusted from time to time, time management can be performed accurately. In addition, since the return signal from the terminal device includes the time of the terminal side clock circuit, the solid device side can grasp the terminal time difference.
We can provide a road survey system that allows clock circuits to be repaired or replaced when necessary.

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration diagram showing an embodiment of the road survey system according to the present invention, FIG. 2 is a block diagram of each terminal device in FIG. 3, and FIGS. 3 and 4 are transmission procedures and transmission formats. FIG. 5 is a schematic configuration diagram showing another example of the system of the present invention. 10, 10'... solid device, 11... device main body,
12... Standard clock, 13... Modem, 20', 2
11)A. 20B...Terminal device, 22...Counter, 23...
・Clock circuit, 24... Control circuit, 25... Memory,
26... Signal conversion circuit, 27... Modem, 28...
- Terminal address setting section. Applicant's Representative Patent Attorney Takehiko Suzue Figure 1 Figure 5 Figure 4 Figure 5

Claims (4)

[Claims] (1) A solid device having a standard clock, and a plurality of terminal devices that generate a time signal from a clock section at predetermined time intervals and store counts of the Grus number proportional to the measured value as time data; A means for connecting these terminal devices and the solid device through a communication line, a means for transmitting a standard time signal read from a standard clock and a polling signal at a required time in the solid device, and a means for connecting the terminal device and the solid device to the solid device side. A through-road survey system, comprising: means for receiving a signal from a clock section and transmitting a time signal from a clock section and the time limit data to the solid device, and adjusting the time of the clock section. (2) 7t? - The road survey system according to claim 1, wherein the ring signal has a terminal calling address and a control code. (3) The load survey device according to claim 1, wherein the means for determining that the terminal device is a self-terminal compares an address previously owned by the terminal device with the polling signal, and determines that the terminal device is self-terminal when they match. (4) The solid device compares the time signal from the clock unit from the terminal device with the standard time signal from its own standard clock, and if the time difference is greater than a predetermined value, it generates a notification signal. A road survey system according to claim 1.