KR930006422B1 - Automatic remote checking circuit - Google Patents

Abstract

The method for telemetering from a remote measurement site comprises the following system scheme and circuits: data access center (DAC,200) gathering measuring data from intermediate data access center (IDAC,300) or remote meter modules (401-410), (411-420), and converting measured data to units and transmitting it to the central processing unit (100) through modem network (600) ; handler (500) for providing initial values to DAC (200), IDAC (300), and meter modules (401-420); the central processing unit (100) for initiating telemetering control command to sub- systems and receiving measured data from remote sites.

Description

Automatic remote meter reading circuit

1 is a block diagram of a conventional remote metering circuit.

2 is a block diagram of an automatic remote meter reading circuit of the present invention.

3 is an embodiment of the present invention.

4 is a detailed block diagram of the DC 200 in FIG.

5 is a detailed block diagram of the meter module 401 in FIG.

6 is a detailed block diagram of the handler 500 in FIG.

* Explanation of symbols for main parts of the drawings

41,502: Source 42,100,201,503: Central processing unit

43,209,507 Communication unit 44,203 Watchdog

45: pulse detection unit 200: Dee

202: power supply and reset unit 204: input / output control unit

205: System ROM 206: System RAM

207: non-volatile memory 208: real-time clock portion

210: handler communication unit 211: timer

212: serial data input and output unit 213: channel communication unit

300: IDA 401-420: meter module

500: handler 501: keypad

504: reset unit 505: recorder

506: display unit M1M2: meters

The present invention relates to a circuit for automatically reading a meter of a meter at a remote location, and more particularly to an automatic remote metering circuit adapted to quickly perform a remote meter reading at a small group of dwellings.

In general, there are several types of remote metering circuit, and the classification is mainly classified according to the means of securing the communication network. There are a telephone line, a power line, a wireless line, a power line, and a CA TV line.

1 is a block diagram of a remote metering circuit using a conventional telephone line, which includes an exchanger 1, an exchange matching unit 2, a central processing unit 3, a meter terminal 4, a meter ME1, and a telephone ( TE1) and its effects are as follows.

When the central processing unit 3 gives a meter reading command to the exchange matching unit 2, the exchange matching unit 2 captures the line of the meter terminal 4 to be read through the corresponding test line of the exchange unit 1, and then The meter terminal 4 reads the measured value of the meter ME1 that is being weighed and transmits it to the central processing unit 3. In this case, if the customer is using the telephone TE1, the caller is given priority to stop the meter reading operation, and when the exchange matching unit 2 calls the meter terminal 4, a test line is used so Does not ring

However, such a conventional circuit is convenient to read an unspecified number of meters distributed in a large area, but it is inconvenient when applied in a small group of residences or where it is necessary to read the reading from time to time. . In other words, if you use a regular telephone line for small group dwellings, you need to go through the exchange office every time you want to read the meter, so you can't read it immediately when you want it. Due to this, there was a problem that data management becomes difficult.

In order to solve the above problems, the present invention enables the remote meter reading in small group dwellings to be performed quickly, and the system can be easily changed and checked and installed by the central processing unit and interactive communication. It is intended to be carried out as will be described in detail with reference to the accompanying drawings.

2 is a block diagram of the automatic remote meter reading circuit of the present invention, as shown therein, a central processing unit 100 for controlling the whole system, and connected to the central processing unit 100 through an interface device a plurality of A data access center (DAC) having a channel of a terminal device and converting a unit of an input value from the terminal device and providing the same to the central processing unit 100, and through the interface device. IDC (Intermediate Data Access Center: IDAC) for processing intermediate data with the 200, and a meter module (401-410) for providing the measured value to the IDC 300 through the interface device and And meter modules 411-420 for providing the read measured values to the DC 200 through an interface device, and the DC 200, ID 300, and meter module 401 in the field when the system is installed. Vs. -420 It formed the initial value as a handler (Handler) (500) to be able to set without the use of a central processing unit (100).

3 is an exemplary embodiment of the present invention through a public telephone network, and the central processing unit 100 and the DC 200 are connected to each other through modems 600A and 600B and a public telephone network, as shown. .

FIG. 4 is a detailed block diagram of the DC 200. As shown in FIG. 4, the entirety of the DC 200 is controlled for data exchange with the CPU 100 through an interface device RS232C. The central processing unit 201, the power supply and reset unit 202 for supplying power and reset signals from each system part, and outputs a pulse of a predetermined period so as not to be reset to the central processing unit 201 A watch dog (203), an input / output controller (204) for controlling input / output data between the central processing unit (201), the IDC 300, and the meter modules (411-420), and the input / output controller ( A system ROM 205 for storing data read / written by 204, a system RAM 206, a nonvolatile memory 207, a real-time clock section 208 for providing a real-time clock to the system, and an interface Data communication with the CPU 201 via the device RS232C The communication unit 209 to perform, the handler communication unit 210 to perform data communication with the meter module (411-420) and IDC 300 through the interface device (RS485), and the timer 211 to check the time of the system ), A serial data input / output unit 212 for processing serial data input and output to the system, and the central processing unit 201 and the meter module (411-420) or IDC (300) through an interface device (RS485) And a channel communication unit 213 providing a data communication diagram.

FIG. 5 is a detailed block diagram of the meter modules 401-420 in FIG. 2 and a power supply unit 41 for supplying power required by each system unit, and the DC 200 or ID as shown in FIG. 2. A central processing unit 42 for controlling the entire system for communication with the AC 300, and provides a data communication path (RS485) between the channel communication unit 213 and the central processing unit 42 of the DC 200 The communication unit 43, the watchdog 44 for controlling the reset of the central processing unit 42, and the measured value measured by the meters (M1, M2) and provides it to the central processing unit (42) It consisted of the pulse detection part 45.

6 is a detailed block diagram of the handler 500 in FIG. 2, which is required by the keypad 501 for setting the input data of the meter modules 401-420, and the system parts. A power supply unit 502 for providing a voltage, a central processing unit 503 for controlling each system unit, a reset unit 504 for controlling a reset of the central processing unit 503, and the keypad 501 A decoder 505 that encodes a key signal of a key) and provides it to the central processing unit 503, a display unit 506 representing data processed by the central processing unit 503, and the central processing unit 503. And a communication unit 507 in charge of data transfer between the display unit and the display unit 506.

Referring to the operation and effect of the present invention configured as described above in detail. When the central processing unit 100 outputs an operation command signal including a metering command to the DC 200 through the interface device RS232C or through the modems 600A and 600B and the public telephone network PTN, the DC (200) analyzes the input command and finds a path in the conversion table in the nonvolatile memory 207 to find the corresponding register in which the measured value is stored. All the registers used in the present invention have a unique number. The unique number and the data actually for that register are recorded in the conversion table.

If the corresponding register is among the meter modules 411-420 directly connected to any one channel communication unit 213 of the DC 200, the DC 200 immediately gives a command to the corresponding meter module, If there is any one of the meter modules 401-410 directly connected to the channel communication unit 213 of the 300, the DC 200 gives the ID 300 the command to transfer a command to the corresponding register. The received IDC 300 analyzes this and delivers the command to the corresponding meter module.

Accordingly, the meter module receiving the command outputs the measured value stored in the register to the DC 200 or the ID 300 and the channel communication unit 213, and the DC 200 processes the inputted measured value in the central processing unit. Transmission to the device 100 ends the execution of the command.

Here, when the DC 200 performs the operation on a plurality of registers, if these registers are connected to the ID 300, while the ID 300 (300) performs the corresponding command while other meter module ( 411-412) or IDA. That is, the ID 300 performs a batch job.

The entire system is equipped with security devices such as passwords and case open monitoring devices to maintain security. The use of the handler 500 is possible only for the time allowed by the central processing unit 100 and may give the system a command to disable the handler 500 at the end of work.

The central processing unit 100 may interactively communicate with the DC 200 to use the system without special software.

As a result, a system distributed in several places in one central processing unit 100 can be connected through a dedicated line as shown in FIG. 2 or through modems 600A, 600B and a public telephone network (PTN) as shown in FIG. The management company can build a system to control the distributed management areas collectively.

As described in detail above, the present invention can implement a high communication speed by using a local dedicated line, unlike a telephone line using method of controlling a direct exchange, and can read a meter at any time. In addition, it is easy to establish a local and independent data management system, so that the system can be easily modified, installed, and checked for trouble spots.

In addition, by providing a password to the system, there is an advantage that can prevent the system from being changed by anyone other than the administrator.

Claims (5)

A central processing unit (100) for outputting a meter reading string for reading the reading of the terminal device, and provides a metering path to the central processing unit (100) and converts the reading unit of the terminal device input through the selected channel Decision 200 provided to the central processing unit 100, the ID 300 to process the intermediate data with the data 200, and read the measured value of the ID 300, Dei Meter modules 401-410 and 411-420 respectively provided to the seed 200, and initial values for the DC 200, IDC 300, and meter module 401-420 when the system is installed. Automatic remote meter reading circuit, characterized in that consisting of a handler 500 to set. According to claim 1, Central processing unit 201 for controlling the entire system for data exchange with the central processing unit 100, and outputs a pulse of a predetermined period so as not to be reset to the central processing unit (201) A watchdog 203, an input / output controller 204 for controlling input / output data between the IDC 300 and the meter modules 411-420, a nonvolatile memory 207 for storing a conversion table for the meter reading path, And a channel communication unit providing a data communication path between the central processing unit 201 and the communication unit 209 to communicate with the central processing unit 201 and the meter modules 411 to 420 or the ID 300. The automatic remote meter reading circuit, characterized in that the (DS) 200 configured to. According to claim 1, Central processing unit 42 for controlling the entire system for communication with the DC 200 or IDC 300, the channel communication unit 213 and the central processing of the DC 200 The meter is provided with a communication unit 43 which provides a data communication path between the devices 42 and a pulse detector 45 which senses the measured values measured by the meters M1 and M2 and provides them to the central processing unit 42. Automatic remote meter reading circuit comprising a module (400). According to claim 1, wherein the keypad 501 for setting the input data of the meter module (401-402), the initial value for the DC 200, the ID 300, the meter module (401-420) A central processing unit 503 for controlling the system for setting, a decoder 505 for encoding the key signal of the keypad 501 and providing it to the central processing unit 503, and the central processing unit 503 And a handler (500) comprising a display unit (506) indicating data to be processed by the system. The automatic remote meter reading circuit according to claim 1, wherein the central processing unit (100) and the DC (200) are connected through a modem (600A, 600B) and a public telephone network (PIN).