JP3199435B2 - Remote control terminal - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a total power distribution automation system, and more particularly to a terminal device for a system in which a plurality of meters, such as electricity and gas, are installed in a customer's house and a remote automatic meter reading is performed.

[0002]

2. Description of the Related Art Conventionally, in a system of this type, when a terminal device including devices having different data transmission speeds transmits data, a plurality of modems, that is, modems are used, or a memory is temporarily stored in the terminal device. And then rearranged them and sent them out at the same data transmission rate.

[0003]

However, in the above-mentioned conventional method, the number of modems increases as the types of different devices increase, which causes a problem that the size of the terminal device becomes large and the price rises. was there. In addition, there is also a problem that a complicated communication procedure between terminals to be transmitted is required to grasp the regularity of the data contents and cannot be handled independently as a so-called black box.

An object of the present invention is to solve such a conventional problem, and an object of the present invention is to provide an excellent remote automatic meter reading system terminal device using a single modem.

[0005]

According to the present invention, in order to achieve the above object, one modem is installed in a terminal device to transmit start-stop synchronous data transmitted from a center terminal which is a main terminal. Other than the information data to be transmitted ,
Identification data indicating the multiple of the speed has a configuration that is added to the head. The receiving terminal specifies a constant to be oversampled by the identification data, and normally receives information data including control information following the identification data.

[0006]

Therefore, according to the present invention, a single modem having a transmission multiple of a common multiple thereof is installed for data of devices having different transmission speeds included in the terminal device, and the Since the data transmission is performed while identifying the selection of the transmission speed based on the information, it is possible to cope with many devices having different transmission speeds.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a system configuration diagram of this embodiment.
In FIG. 1, reference numeral 11 denotes a line controller for managing lines and giving line use permission to each terminal; 12 a workstation for managing operations such as generation, management and storage of information;
Reference numeral 3 denotes a center-side communication terminal as a main terminal disposed between the workstation 12 and the line, 14 denotes a line formed of a coaxial line, an optical fiber, or the like, and 15 denotes a dwelling unit reception as a sub-terminal installed in each dwelling unit. A terminal, 16 is a power meter for measuring used electric power, 17 is a gas meter for measuring used gas, and 18 is a water meter for measuring used water. The center communication terminal 13 and the dwelling unit reception terminal 15 employ a system in which multi-channel access is realized by wire, perform mutual communication with the line use permission of the line controller 11, and perform one-to-one individual communication, It is configured to perform group or all-at-a-glance sibling communication.

Next, the operation of the above configuration will be described.
As shown in FIG. 2, the information signal transmitted from the center communication terminal 13 to the dwelling unit terminal 15 includes an identification signal 21 and an information signal 22 that is control information for each device.

FIG. 3 shows the internal configuration of the dwelling unit side terminal 15. Reference numeral 31 denotes a detection circuit for detecting an information signal obtained from the line 14, 32 denotes a modem for converting the detected signal into a digital signal, and 33 denotes a modem. A code conversion unit for performing code conversion of the identification signal obtained from the microprocessor, a reception control unit configured to decode the identification signal, and a switching unit for switching the information signal obtained from the modem 32 to each meter and connecting them. is there.

The operation of the above configuration will be described. The identification signal 21 transmitted from the center side communication terminal 13, via the line 14, through the detection circuit 31, the modem 32, and the code conversion unit 33, and supplied to the reception control unit 34 is decoded, and is transmitted to the switching unit 35. A switching command signal is provided to control the destination of the information signal 22 supplied from the modem 32 to the switching unit 35.

FIG. 4 shows a signal format when the workstation 12 communicates with the gas meter 17 having a transmission rate of 300 bps. The identification signal 21 has a transmission rate of 1200 bps and an information code of 1010.
10101010, and the content of the information signal 22 indicates the timing when the transmission rate is 300 bps and the information code is 101010. The code conversion unit 33 extracts these information codes having different transmission rates by the same time-series sampling, and when the format of the signal 42 is 300 bps, the reception control unit 34 treats 3 bits as one data.

The signal 23 in FIG. 2 has a transmission speed of 300 bps.
Is meter data transmitted from the gas meter 17 to the workstation 12. When the workstation 12 communicates with the electric meter 16 having a transmission rate of 1200 bps, the transmission rates of the identification signal 21, the information signal 22, and the meter data 23 are all 1200 bps.

[0014]

According to the present invention, as it is clear in the above embodiment, with respect to transmission rate different devices of the data contained in the terminal apparatus, set up a one modem with a transmission speed of the Oyakebai number Thus, the following effects can be obtained by performing data transmission while identifying the selection of the transmission speed based on the advance information.

(1) The number of modems can be reduced, and the cost can be reduced. (2) The number of modems can be reduced and the size of the device can be reduced.

(3) Mutual data encoding can be operated in an informationally independent relationship.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of an embodiment of the present invention.

FIG. 2 is a format of an information signal according to an embodiment of the present invention.

FIG. 3 is a block diagram of a receiving unit on the dwelling unit side in FIG. 1;

FIG. 4 is a timing diagram of a transmitted signal.

[Explanation of symbols]

 REFERENCE SIGNS LIST 11 line controller 12 workstation 13 center side communication terminal 14 line 15 dwelling unit receiving terminal 16 power meter 17 gas meter 18 water meter 21 identification signal 22 information signal 23 meter data 31 detection circuit 32 modem 33 code conversion unit 34 reception control unit 35 Switching section

Continuation of the front page (72) Inventor Hiroyuki Fudo 3-3-22 Nakanoshima, Kita-ku, Osaka-shi, Osaka Kansai Electric Power Co., Inc. (56) References JP-A-2-233096 (JP, A) (58) Field (Int.Cl. ⁷ , DB name) G01R 11/00-11/66 G01R 21/00-22/04 G08C 15/00 H04Q 9/00 311

Claims (1)

(57) [Claims] 1. A remote device including an identification code having transmission speed information.
The main terminal that outputs the remote meter reading signal and the remote terminal that receives this remote meter reading signal
Sub terminal connected to multiple devices with different transmission speeds
The secondary terminal modulates and demodulates the remote meter reading signal.
Dem, a switching unit for selecting any of the plurality of devices,
Transmission speed information of the remote meter reading signal obtained from the modem
A reception control unit that controls the switching unit based on the notification.
A remote control terminal device characterized by the above-mentioned .