JP2001044843A - Text converter and data collection system utilizing the text converter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a text converter, that is used in common by various 8-bit text communication devices in the case of collecting data of a meter with a 5-bit text communication function. SOLUTION: This text converter 5 is provided with a 1st interface section 4 that sends/receivers a 1st transmission signal, a 2nd interface section 7 that sends/receives a 2nd transmission signal, and a main control section 6. The main control section 6 converts the 1st transmission signal received from a 1st communication device into a 2nd transmission signal, outputs it to a 2nd communication device 8, converts the 2nd transmission signal received from the 2nd communication device 8 into the 1st transmission signal, and outputs it to the 1st communication device 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a message converter and a data collection system using the message converter.

[0002]

2. Description of the Related Art Automatic meter reading and terminal call communication of meters with communication functions such as gas, water, and electricity using an analog public network or a dedicated line have already been put to practical use. Here, in the center device in the meter reading center,
A center device that performs transmission and reception of signals and information processing of collected data using an 8-bit code is mainly used. In a meter with a communication function, a 5-bit telegram-type meter with a communication function and an 8-bit telegram are used. Meters with a built-in communication function are used together. For example, in an LPG meter and the like, a meter with a 5-bit telegram communication function is still widely used at present, and a transmission device having a function of mutually converting a 5-bit telegram signal and an 8-bit telegram signal has been developed.

[0003] First, the configuration of a conventional 5-bit / 8-bit common transmission apparatus will be described with reference to FIGS. 8 and 9. Here, FIG. 8 shows not only the sign but also
FIG. 9 is a list showing main features of a 5-bit message signal and an 8-bit message signal which are different from each other in a communication speed, an error control method, and the like. FIG. 9 is a configuration diagram of a 5-bit / 8-bit common type transmission device in the related art. is there.

First, the configuration of a conventional 5-bit / 8-bit transmission device will be described with reference to FIG.

[0005] The center device 10 is a device installed in a meter reading center for transmitting and receiving an 8-bit message signal and information processing of collected data.

Meter 17 with 5-bit telegram communication function
Is a device provided in each house that can read data and transmit / receive a 5-bit electronic signal.

Meter 19 with 8-bit electronic communication function
Is a device provided in each house, which can read data and transmit / receive an 8-bit electronic signal.

5 bit / 8 bit common type transmission device 14
Is a device that performs mutual conversion between a 5-bit message signal and an 8-bit message signal. The 5-bit / 8-bit common transmission device 14 is interposed between the center device 10 and the meter 17 with a 5-bit electronic communication function or the meter 19 with an 8-bit electronic communication function provided in each house, It is connected to an analog public network 11. However, when using the meter 17 with the 5-bit message communication function, the meter 17 with the 5-bit message communication function is connected to the 5-bit message signal compatible interface unit 16 and the meter 19 with the 8-bit message communication function is connected. In use, the meter 19 with the 8-bit message type communication function is connected to the 8-bit message signal compatible interface unit 18 (in FIG. 9,
Both the meter 17 with the 5-bit message communication function and the meter 19 with the 8-bit message communication function are shown). The configuration of the 5-bit / 8-bit common transmission device 14 will be described in detail below.

[0009] The network control unit 12 includes an analog public line network 11.
In response to a call from the center device 10 or a call from the meter 17 with a 5-bit electronic communication function or the meter 19 with an 8-bit electronic communication function, the meter 17 or 8 with a 5-bit electronic communication function The meter 19 with the bit message type communication function is connected to the analog public network 1
1 and has a function of configuring a data communication circuit between the center apparatus 10 and the meter 17 with a 5-bit electronic communication function or the meter 19 with an 8-bit electronic communication function.

The modem unit 13 demodulates the 8-bit message signal output from the network control unit 12 and outputs it to the main control unit 15 as an 8-bit message digital signal. It has a modulation and demodulation circuit that can modulate the 8-bit electronic message digital signal and output it to the network control unit 12 as an 8-bit electronic signal.

The main control unit 15 controls the operation of each circuit, and outputs an 8-bit telegram-type digital signal output from the modem unit 13 to an 8-bit telegram signal-compatible interface unit 18. This is a part that outputs an 8-bit telegram-type digital signal output from the bit telegram signal correspondence interface unit 18 to the modem unit 13. Further, the main control unit 15 converts the 8-bit message digital signal output from the modem unit 13 into a 5-bit message digital signal and outputs it to the 5-bit message signal corresponding interface unit 16, and conversely, This is a portion that converts a 5-bit message digital signal output from the 5-bit message signal interface 16 into an 8-bit message digital signal and outputs the signal to the modem 13.

The 5-bit message signal interface unit 16 has an input / output terminal for a meter with a 5-bit message communication function, and is interposed between the meter 17 with a 5-bit message communication function and the main control unit 15. It is a part for inputting and outputting a 5-bit electronic digital signal.

The 8-bit message signal interface unit 18 has an input / output terminal for a meter with an 8-bit message communication function, and is interposed between the main unit 15 and the meter 19 with an 8-bit message communication function. This is a part for inputting and outputting an 8-bit electronic digital signal.

The operation of the conventional 5-bit / 8-bit common transmission device 14 having such a configuration will be described with reference to FIG.

First, through the analog public network 11,
A case where a call is received from the center device 10 will be described.

The network controller 12 disconnects the telephone set 20 from the analog public telephone network 11 in response to the incoming call from the center apparatus 10, and connects with the center apparatus 10 to a meter 17 having a 5-bit message communication function or an 8-bit message. A data communication circuit is formed between the meters 19 with the expression communication function. When the communication state is established, the modem unit 13 sets the center device 10
The demodulator 8 demodulates an 8-bit message signal transmitted from the network controller 12 and input through the network controller 12 and outputs the demodulated signal to the main controller 15 as an 8-bit message digital signal.

When the meter 19 with the 8-bit electronic message communication function is connected to the 8-bit electronic message signal compatible interface unit 18, the main control unit 15
When receiving the selected message designating the bit message signal-corresponding interface unit 18, it transmits a start message to the meter 19 with the 8-bit message communication function to start communication. After that, the main control unit 15 outputs the 8-bit electronic message digital signal output from the modulation / demodulation unit 13 to the 8-bit electronic message communication function-equipped meter 19 through the 8-bit electronic signal correspondence interface 18.

When the 5-bit telegram communication function-equipped meter 17 is connected to the 5-bit telegram signal compatible interface section 16, the main control section 15
When receiving the selected message designating the bit message signal-corresponding interface section 16, the communication device 10 starts communication by transmitting a start message to the meter 17 with the 5-bit message communication function. Thereafter, the main control unit 15 converts the 8-bit message digital signal output from the modem unit 13 into a 5-bit message digital signal, and transmits the 5-bit message signal through the 5-bit message signal compatible interface unit 16. Meter 1 with
7 is output.

In this manner, data transmission from the center device 10 to the meter 17 with the 5-bit electronic communication function or the meter 19 with the 8-bit electronic communication function is performed.

Conversely, data transmission from the meter 17 with the 5-bit electronic communication function or the meter 19 with the 8-bit electronic communication function to the center device 10 is performed as follows.

When the meter 19 with the 8-bit message communication function is connected, the meter 19 with the 8-bit message communication function transmits the 8-bit message digital signal for the start message from the main control unit 15 and the subsequent digital signal. Center device 1
An 8-bit telegram digital signal corresponding to the meter transmission telegram from 0 is output to the main control unit 15 through the 8-bit telegram signal corresponding interface unit 18. Then, the main control unit 15 controls the interface unit 1 corresponding to the 8-bit message signal.
The 8-bit electronic digital signal input through 8 is directly output to the modulation / demodulation unit 13.

When the meter 17 with the 5-bit telegram communication function is connected, the meter 17 with the 5-bit telegram communication function transmits the 5-bit telegram digital signal corresponding to the activation telegram from the main control unit 15 and the subsequent digital signal. Center device 1
A 5-bit telegram digital signal corresponding to the meter transmission telegram from 0 is output to the main control unit 15 through the 5-bit telegram signal corresponding interface unit 16. Then, the main control unit 15 controls the interface unit 1 corresponding to the 5-bit message signal.
The digital signal of the 5-bit telegram type input through 6 is converted into a digital signal of the 8-bit telegram type and output to the modulation / demodulation unit 13.

In any case, the modulation / demodulation unit 13 modulates the 8-bit digital signal output from the main control unit 15 and outputs it to the network control unit 12 as an 8-bit electronic signal. The network control unit 12 transmits the 8-bit message signal demodulated by the modem unit 13 to the center device 10 through the analog public network 11.

In this manner, data transmission from the meter 17 with the 5-bit electronic communication function or the meter 19 with the 8-bit electronic communication function to the center device 10 is performed.

Up to this point, data transmission / reception when a call from the center device 10 has been described has been described.
The transmission and reception of data when the meter 19 with the bit message communication function requests a call is almost the same.

That is, in the case of a call from the meter 17 with the 5-bit message communication function, the main control unit 15 performs individual processing on the meter 17 with the 5-bit message communication function.
In response to this request, the network control unit 12 dials a telephone number of the center device 10 stored in advance through the analog public network 11. Also, in the case of a call from the meter 19 with the 8-bit message communication function, the network control unit 12
Sends a telephone call of the telephone number of the center device 10 included in the call message through the analog public network 11. In response to such a dialing call, the center device 10 and the meter 17 with a 5-bit electronic communication function are communicated.
Alternatively, a data communication circuit is configured between the meters 19 having an 8-bit electronic message communication function. When the communication state is established, data transmission / reception is performed via the 5-bit / 8-bit common transmission device 14 as described above.

By using the 5-bit / 8-bit common transmission device 14 as described above, the analog public line of the meter 17 with the 5-bit electronic communication function and the meter 19 with the 8-bit electronic communication function can be used. Automatic meter reading and terminal call communication using the network 11 are enabled. In any case, the data information is transmitted as an 8-bit message signal that can be easily processed by a computer.

[0028]

By the way, the price of the communication method using a wireless public line network such as a PHS or a digital public line network such as an ISDN is reduced, so that the data collection of a meter with a communication function can be performed. It has become possible to use a network.

Here, a data collection system for a meter with an 8-bit telegram communication function utilizing a radio public network, or an 8-bit telegram digital public network, via an 8-bit telegram wireless public network controller. A data collection system for a meter with an 8-bit electronic message communication function using a digital public network via a control device has already been put into practical use. In addition, a data collection system of a meter with an 8-bit message communication function using wireless communication via an 8-bit message wireless device has already been put into practical use.

However, for example, in a joint meter reading,
When collecting data of a meter with a 5-bit message communication function together with a meter with an 8-bit message communication function, the communication specifications are different, so the 8-bit message communication device corresponding to various lines as described above is used as it is. It could not be used. Therefore, it is necessary to independently develop a transmission device corresponding to each line, such as a 5-bit / 8-bit common transmission device 14, for example.

In order to collect data from a meter with a communication function installed in a place where wiring is impossible, a radio system using specific low power must be used. The device could not be used as it was. Therefore, it was necessary to independently develop a wireless device supporting 5 bits and 8 bits.

The present invention, in consideration of such problems, provides a message conversion device which can be used in common by various 8-bit message communication devices and enables data collection of a meter with a 5-bit message communication function. It is intended to do so.

[0033]

Means for Solving the Problems The first invention (claim 1)
Corresponds to) a first interface unit for transmitting and receiving a first transmission signal, a second interface unit for transmitting and receiving a second transmission signal, and a mutual interface between the first transmission signal and the second transmission signal. A main control unit that performs conversion, the main control unit converts the first transmission signal input from the first communication device through the first interface unit to the second transmission signal. The second communication device outputs to the second communication device through the second interface unit, and the second communication device inputs the second transmission signal input through the second interface unit to the first communication device. , And outputs the transmission signal to a first communication device through the first interface unit.

According to a second aspect of the present invention (corresponding to claim 2), the main control unit receives a start signal for notifying the start of a call of the second communication device input from the second communication device. Responding and outputting a signal confirming the content of the call to the second communication device, and responding to the call of the second communication device included in the signal input from the second communication device. And the contents of the call are output to the first communication device.

According to a third aspect of the present invention (corresponding to claim 3), the first interface unit is an 8-bit message signal compatible interface unit for transmitting and receiving an 8-bit message signal, and the second interface unit is An interface unit corresponding to a 5-bit message signal for transmitting and receiving a 5-bit message signal, wherein the main control unit performs mutual conversion between the 5-bit message signal and the 8-bit message signal. It is a message conversion device.

The fourth invention (corresponding to claim 4) provides a message conversion device according to the first or second invention, a first communication device for transmitting and receiving a first transmission signal, and a second transmission signal. And a center device for transmitting and receiving signals to and from the first communication device.

According to a fifth aspect of the present invention (corresponding to claim 5), the message conversion device is the message conversion device of the third invention, and the first communication device transmits and receives an 8-bit message signal.
Bit telegram communication device, wherein the second communication device,
The data collection system according to a fourth aspect of the present invention is a meter with a 5-bit telegram communication function for transmitting and receiving a 5-bit telegram signal.

A sixth invention (corresponding to claim 6) is characterized in that the 8-bit electronic communication device is an 8-bit electronic analog network control device connected to an analog public network. A data collection system according to a fifth aspect of the present invention.

A seventh aspect of the present invention (corresponding to claim 7) is characterized in that the 8-bit telegram communication device is an 8-bit telegram digital public network controller connected to a digital public network. A data collection system according to a fifth aspect of the present invention.

According to an eighth aspect of the present invention (corresponding to claim 8), the 8-bit electronic communication device is an 8-bit electronic wireless network controller connected to a wireless public network. A data collection system according to a fifth aspect of the present invention.

According to a ninth aspect of the present invention (corresponding to claim 9), the 8-bit electronic communication device is an 8-bit electronic wireless device A, and the wireless device A is different from the 8-bit electronic wireless device. B is wirelessly connected, and the 8-bit electronic message type radio device B is a data collection system according to a fifth aspect of the present invention, which is connected to a public line network or a dedicated line.

According to a tenth aspect of the present invention (corresponding to claim 10), the 8-bit electronic message radio device A and the 8-bit electronic message radio device B are specific low-power radio devices. It is a data collection system of the invention of the invention.

The eleventh invention (corresponding to claim 11) provides:
The data collection system according to the fifth invention, wherein the 8-bit electronic message communication device is an 8-bit electronic message centralized transmission device connected to a public line network or a dedicated line.

[0044]

Embodiments of the present invention will be described below with reference to the drawings. In addition,
FIG. 1 is a configuration diagram of a message conversion device according to an embodiment of the present invention.

First, the configuration of the message conversion device according to the present embodiment will be described with reference to FIG.

The center device 1 is a device that performs transmission and reception of signals and information processing of collected data using an 8-bit code.

The 8-bit message type radio device A3 is a device for transmitting and receiving an 8-bit message type radio signal. Also, 8
The bit message type radio device A3 has an input / output terminal for a meter with an 8-bit message type communication function, and the message conversion device 5 is connected to the input / output terminal. Here, the 8-bit telegram-type wireless signal is, for example, a specific low-power radio signal, and its transmission speed is 7 to 8 times the transmission speed of the 8-bit telegram-type wired signal.

The 8-bit electronic message type radio device A3 includes the following radio signal input / output unit, central processing unit, and 8-bit electronic message type radio device A shown in FIG. It has an interface section X.

The radio signal input / output section is a section for transmitting and receiving an 8-bit electronic radio signal.

The central processing unit converts the 8-bit message type radio signal received by the radio signal input / output unit as an 8-bit message type digital signal into the 8-bit message type radio apparatus A side 8-bit message signal corresponding interface unit X. And conversely, 8
This is a section for outputting an 8-bit message digital signal input from the 8-bit message signal interface unit X of the bit message wireless device A to the wireless signal input / output unit as an 8-bit message signal.

The 8-bit message-type radio apparatus A side 8-bit message-signal-corresponding interface unit X can transmit and receive 8-bit message-type digital signals corresponding to photocoupler coupling. It is connected to the bit message signal corresponding interface unit 4. In addition, the 8-bit message-type signal-corresponding interface unit X and the 8-bit message-signal-corresponding interface unit 4 are connected by a signal line via the connection unit 21. , Can be freely detached from the connecting portion 21.

The 8-bit message radio device B9 is a device for transmitting and receiving an 8-bit message signal to and from the center device 1 through the public line network 2, and transmitting and receiving an 8-bit message radio signal.

The meter 8 with the 5-bit telegram communication function is
It is a device provided in each house that can read data and transmit and receive 5-bit message signals.

The message converter 5 includes a main controller 6 and an 8-bit message signal interface unit 4 shown below.
And an interface unit 7 corresponding to a 5-bit electronic message signal. The interface unit 7 is interposed between the 8-bit electronic wireless device A and the meter 8 with the 5-bit electronic communication function, and is configured to transmit the 5-bit electronic signal and the 8-bit electronic signal. This is a device that performs mutual conversion.

The main control unit 6 is a control circuit for controlling the operation of each circuit, and has a built-in memory for temporarily storing an 8-bit message signal and a 5-bit message signal. It has an 8-bit serial data input / output unit connected to the interface unit 4 and a 5-bit serial data input / output unit connected to the 5-bit message signal corresponding interface unit 7. As will be detailed later,
The main control unit 6 converts the 5-bit message digital signal input from the 5-bit message signal compatible interface unit 7 into
The digital signal is converted into an 8-bit message type digital signal and output to the 8-bit message type radio device A3 via the 8-bit message signal corresponding interface unit 4, and conversely, the 8-bit signal input from the 8-bit message signal corresponding interface unit 4 is output. It has a function of converting a digital signal of a telegram type into a digital signal of a five-bit telegram type and outputting it to the meter 8 with a five-bit telegram type communication function via the interface unit 7 corresponding to the five-bit telegram signal.

The 8-bit message signal compatible interface unit 4 is interposed between the main control unit 6 and the 8-bit message type radio device A3, and inputs and outputs an 8-bit message type digital signal corresponding to photocoupler coupling. Part. The circuit configuration of the 8-bit message signal corresponding interface unit 4 will be described later.

The 5-bit message signal interface unit 7 is interposed between the main control unit 6 and the meter 8 with a 5-bit message communication function to input / output 5-bit message digital signals corresponding to metallic coupling. This is the part to do. The circuit configuration of the 5-bit message signal corresponding interface unit 7 will be described later.

Here, referring to FIGS. 2 and 3,
The circuit configuration of the interface unit will be described.
However, FIG. 2 is a circuit diagram of the 8-bit message-signal-corresponding interface unit X and the 8-bit message-signal-signal-corresponding interface unit 4 of the 8-bit message-type wireless device A, and FIG.
5 shows a circuit diagram of the meter-side 5-bit electronic message signal compatible interface unit Y and the 5-bit electronic message signal compatible interface unit 7 with the 5-bit electronic message communication function.

First, referring to FIG. 2, the interface unit 4 corresponding to the 8-bit message signal and the interface unit X corresponding to the 8-bit message signal on the side of the 8-bit message-type radio apparatus A will be described.
Will be described.

In the 8-bit message signal corresponding interface unit 4, the interconnection point A1 between the 8-bit message signal corresponding interface unit 4 and the 8-bit message type radio device A side 8-bit message signal corresponding interface X is connected to the switch S.
It is connected to the movable contact of W2. Further, an interconnection point A2 between the 8-bit message signal corresponding interface unit 4 and the 8-bit message-type wireless device A side 8-bit message signal corresponding interface unit X is connected to the movable contact of the switch SW1. The make contact of the switch SW1 is connected to the power supply voltage Vh via the resistor R1. The break contact of the switch SW1 is grounded. Also, the switch SW2
Are connected to the power supply voltage Vh via the resistor R2 and also to the data input / output line L1. The break contact of the switch SW2 is grounded. The switches SW1 and SW2 are configured by semiconductor switches, and are controlled by a control circuit built in the main control unit 6. In a normal state (non-communication state), the switch SW1 is on the break contact side, and the switch SW2 is on the make contact side. One end of the data input / output line L1 is connected to a memory built in the main control unit 6 through an 8-bit serial data input / output unit.

In the 8-bit message type radio device A side 8-bit message signal corresponding interface section X, the collector of the phototransistor F1t of the photocoupler F1 is connected to the interconnection point A1, and the phototransistor F1t is connected.
Are connected to the interconnection point A2. The light emitting diode F2d of the photocoupler F2 is connected in parallel with the phototransistor F1t. Therefore, the 8-bit message type radio device A3 and the message conversion device 5
Are electrically insulated by the photocouplers F1 and F2. As will be described later, the phototransistor F1t of the photocoupler F1 is used for signal transmission from the 8-bit electronic radio device A3 to the electronic message conversion device 5;
The light-emitting diode F2d is used for signal transmission from the message conversion device 5 to the 8-bit message-type wireless device A3.

Next, the circuit configuration of the 5-bit electronic message signal compatible interface unit 7 and the 5-bit electronic message signal compatible interface unit Y with 5-bit electronic message communication function will be described with reference to FIG.

In the 5-bit message signal compatible interface unit 7, the switch SW3, the resistor R3, and the resistor Rh
It is connected in series to the power supply voltage Vh. One end of the resistor Rh is grounded via the switch SW4. One end of a resistor R4 connected in parallel with the resistor R3 is also grounded. The connection point between the resistors R3 and Rh and one end of the resistor R4 that is not grounded are connected by a data input / output line L2. One end of the data input / output line L2 is connected to a memory built in the main control unit 6 through a 5-bit serial data input / output unit. The other end of the data input / output line L2 is connected to the 5-bit message signal interface unit 7 and the 5-bit message signal interface unit Y with 5-bit message communication function.
Interconnect point DT. The switches SW3 and SW4 are configured by semiconductor switches, and are controlled by a control circuit built in the main control unit 6. In the normal state (non-communication state), the switch SW3
The switch SW4 is in the OFF state. 5
An interconnection point SG between the bit message signal corresponding interface unit 7 and the meter-side 5-bit message signal corresponding interface unit Y having the 5-bit message type communication function is grounded.
Note that the value of the resistor Rh is sufficiently smaller than the value of the resistor R4.

In the 5-bit electronic message signal compatible interface unit Y with 5-bit electronic message communication function, the switch SW5, the resistor R5, and the resistor Rm are connected in series to the power supply voltage Vm. One end of the resistor Rm is connected to a switch SW.
6 is grounded. One end of a resistor R6 connected in parallel with the resistor R4 is also grounded. One end of the data input / output line L3 is connected to a control circuit built in the meter 8 with a 5-bit electronic communication function. A connection point between the resistors R5 and Rm and one end of the resistor R6 that is not grounded are connected by a data input / output line L3. The other end of the data input / output line L3 is an interconnection point DT between the 5-bit message signal compatible interface unit 7 and the meter-side 5-bit message signal compatible interface unit Y with 5-bit message communication function. The switch SW5 and the switch SW6 are configured by semiconductor switches, and are controlled by a control circuit built in the meter 8 having a 5-bit electronic communication function. In the normal state (non-communication state), the switches SW5 and SW6 are both OFF. The interconnection point SG between the 5-bit message signal interface unit 7 and the meter-side 5-bit terminal interface unit Y with 5-bit message communication function is grounded. Note that the value of the resistor Rm is sufficiently smaller than the value of the resistor R6.

The operation of the message conversion device according to the present embodiment having such a configuration will be described with reference to FIG.

First, a case where a call is transmitted from the center apparatus 1 will be described. The center device 1 transmits a signal to the 8-bit electronic radio device B via the public line network 2. The 8-bit message-type radio device B receives the signal transmitted from the center device 1 and transmits the signal to the 8-bit message-type radio device A as a radio signal. The 8-bit message-type wireless device A receives the wireless signal transmitted from the 8-bit message-type wireless device B, and transmits the signal to the message conversion device 5 as a wired signal. The message conversion device 5 responds to the incoming signal of the signal transmitted from the 8-bit message-type wireless device A, and
A data communication circuit is formed between the data communication function and the meter 8 having a 5-bit electronic communication function.

When the communication state is established, the central processing unit of the 8-bit electronic radio system A3 converts the 8-bit electronic signal transmitted from the 8-bit electronic radio system B9 into an 8-bit electronic digital signal. , The 8-bit message type radio device A side 8-bit message signal compatible interface unit X
Output at a speed of 00 bps. The 8-bit message-type wireless device A side 8-bit message-signal-corresponding interface unit X converts the 8-bit message-type digital signal into the message
Side) 8-bit message signal compatible interface unit 4
Output at a speed of 300 bps.

The 8-bit message signal interface unit 4 transmits the 8-bit message type digital signal to the main control unit 6 through an 8-bit serial data input / output unit.
Serial transmission at a speed of 00 bps. The main control unit 6
The 8-bit message digital signal is subjected to horizontal / vertical parity check and converted into an 8-bit message signal by the main control unit 6.
Once stored in the built-in memory. Main controller 6
Converts the 8-bit message signal stored in the internal memory into
According to a sequence determined by a program stored in advance, the data is converted into a 5-bit message signal having equivalent contents, and converted into a 5-bit message digital signal as 5-bit serial data stored in the main control unit 6. The data is serially transmitted at a speed of 200 bps to the 5-bit message signal compatible interface unit 7 through the input / output unit. The 5-bit electronic message signal compatible interface unit 7 supplies a voltage to activate the 5-bit electronic message communication function-equipped meter 8 and converts the 5-bit electronic digital signal into a 5-bit electronic signal shown in FIG. The data is transmitted at a speed of 200 bps to the 5-bit electronic communication meter 8 through the 5-bit electronic message signal compatible interface section Y on the meter side with the electronic communication function.

When a call is received from the center device 1, data is transmitted from the meter 8 with 5-bit electronic message communication function to the center device 1 as follows. That is, a meter 8 with a 5-bit telegram communication function
Detects the start-up voltage supplied from the 5-bit message signal corresponding interface unit 7 of the message conversion device 5 and converts the 5-bit message digital signal from the center device 10 for the meter transmission message into the 5-bit message communication function. 5-bit message signal compatible interface unit 7 through the meter side 5-bit message signal compatible interface unit Y
At a speed of 200 bps. The 5-bit message signal compatible interface unit 7 serially transmits the 5-bit message type digital signal to the main control unit 6 at a speed of 200 bps through a 5-bit serial data input / output unit. The main control unit 6 checks the digital signal of the 5-bit telegram in reverse double transmission, and once stores it as a 5-bit telegram signal in a memory built in the main control unit 6. The main control unit 6 converts the 5-bit electronic message signal stored in the internal memory into an 8 having the same contents according to a sequence determined by a program stored in advance.
It is converted into a bit message signal and converted as an 8-bit message digital signal through an 8-bit serial data input / output unit built in the main control unit 6 to the 8-bit message signal compatible interface unit 4 at a speed of 300 bps. Serial transmission. 8-bit message signal interface unit 4
Outputs the 8-bit message type digital signal to the 8-bit message type radio device A-side 8-bit message signal compatible interface unit X at a speed of 300 bps.

The 8-bit message-type radio apparatus A side 8-bit message-signal-corresponding interface unit X outputs the 8-bit message-type digital signal to the central processing unit at a speed of 300 bps. The central processing unit transmits the 8-bit message digital signal to the 8-bit message wireless device B through the wireless signal input / output unit as an 8-bit message wireless signal.

In the above, transmission and reception of data when a call from center device 1 has been described. The transmission and reception of data when the meter 8 with the 5-bit electronic message communication function requests a terminal call is almost the same.

The meter 8 with a 5-bit electronic message communication function is
When outputting the activation signal for notifying the start of the terminal call, the main control unit 6 responds to the activation signal to the meter 8 with the 5-bit electronic communication function to confirm the contents of the terminal call. Output the message signal to be performed. When the 5-bit telegram communication function-equipped meter 8 outputs a telegram signal including the content of the terminal call in response to the telegram signal for confirming the same, the main control unit 6
Stores the contents of the terminal call once in a memory built in the main control unit 6. Thereafter, the main control unit 6 transmits the 8-bit call message including the telephone number of the center apparatus 1 stored in the main control unit 6 in advance through the 8-bit message signal corresponding interface unit 4 to the 8-bit message format. Transmit to the wireless device A3.

The 8-bit message type radio device A3 receives this 8-bit type call message and converts it into a radio signal.
The data is transmitted to the 8-bit electronic radio device B9. The 8-bit message-type radio device B9 receives the radio signal transmitted from the 8-bit message-type radio device A3, and transmits this to the center device 1 through the analog public network 2. Thereafter, the center device 1 transmits the call information request message to the main control unit 6 via the 8-bit message-type radio device B9 and the 8-bit message-type radio device A3.
Send to

The main control unit 6 receives the call information request message and converts the call information once stored in the memory incorporated in the main control unit 6 into a sequence determined by a program stored in advance. , The data is converted into an 8-bit message signal having the same contents and transmitted to the center device 1.

When the center apparatus 1 receives the call information transmitted from the main control unit 6, a data communication circuit is formed between the center apparatus 1 and the meter 8 with a 5-bit electronic communication function, and transmits and receives signals. Is performed as described above via the message conversion device 5. In other words, the center device 1
When the request message is further transmitted to the 5-bit message communication function-equipped meter 8, signals are transmitted and received in the same manner as in the case where a call from the center apparatus 1 as described above arrives.

Next, referring to FIGS. 2 and 3,
Circuit operation of 8-bit message signal interface 4 and 5-bit message signal interface 7
Will be described.

In the normal state (non-communication state), the light emitting diode F1d of the photocoupler F1 does not emit light,
The transistor F1t is in the OFF state. Also,
As described above, since the switch SW1 is on the break contact side and the switch SW2 is on the make contact side, the potential on the anode side of the light emitting diode F2d of the photocoupler F2 is at the ground level, and the light emitting diode F2d also emits light. Absent.

When the communication state is established as described above, the transmission of a signal from the 8-bit electronic radio device A3 to the meter 8 with the 5-bit electronic communication function is performed as follows.

First, in FIG. 2, when a 1/0 current signal flows through the light emitting diode F1d of the photocoupler F1, the phototransistor F1t receives the light of the light emitting diode F1d and is turned on / off. Therefore, from the power supply voltage Vh, the resistance R2, the switch SW2, the interconnection point A1, the phototransistor F1t, and the interconnection point A
2. A current flows through a ground path via the switch SW1, and by detecting this, the message converter 5 can receive a 1/0 current signal.

Next, in FIG. 3, the switch SW3 is turned on by the control operation of the main control unit 6 to turn on the interconnection point DT.
, The meter 8 with the 5-bit electronic communication function is activated. Further, the switch S
W4 is turned on / off, the voltage level of the interconnection point DT fluctuates, and a 1/0 voltage signal flows. By detecting this, it is possible to receive a 1/0 voltage signal on the side of the meter 8 with the 5-bit electronic communication function.

In this way, when a call from center device 1 arrives, 8-bit message-type radio device A3
Is transmitted to the meter 8 with a 5-bit electronic message communication function. Conversely, when a call from center device 1 arrives, meter 8 with a 5-bit electronic communication function
The transmission of the signal from to the 8-bit electronic message type radio device A3 is performed as follows.

First, in FIG. 3, the switch SW6 is turned ON / OFF by the operation of the control circuit built in the meter 8 with the 5-bit electronic communication function, and the interconnection point D
The voltage level of T fluctuates, and a 1/0 voltage signal flows (the switch SW3 is ON). By detecting this, it is possible to receive the 1/0 voltage signal on the 5-bit message signal interface unit 7 side.

Next, in FIG. 2, the switch SW2 is switched to the break contact side and grounded by the control operation of the main controller 6. The switch SW1 is turned on / off by the control operation of the main control unit 6, and is switched from the power supply voltage Vh through the resistor R1, the switch SW1, the interconnection point A2, the light emitting diode F2d, the interconnection point A1, and the switch SW2,
Current flows through the ground path. Accordingly, a current signal of 1/0 flows through the light emitting diode F2d of the photocoupler F2, and the phototransistor F2t receives light from the light emitting diode F2d and is turned on / off. By detecting this, the 8-bit electronic message type radio device A3 side
/ 0 current signal can be received. When the transmission of the current signal is completed, the switch SW2 is again switched to the make contact side by the control operation of the main control unit 6.

In this way, the transmission and reception of signals between the 8-bit message-type radio device A3 and the meter 8 with the 5-bit message-type communication function via the message conversion device 5 are performed.
At the end of the communication, the switch SW3 is turned off by the control operation of the main control unit 6, and the supply of the power supply voltage Vh to the meter 8 with the 5-bit electronic communication function is stopped. Return.

Up to now, the transmission and reception of signals when a call from the center apparatus 1 has been received has been described. The transmission and reception of signals when the meter 8 with a 5-bit electronic communication function requests a call is substantially the same. It is.

That is, in FIG. 3, when the meter 8 with the 5-bit electronic communication function requests calling, the switch SW5 is turned ON by the operation of the control circuit built in the meter 8 with the 5-bit communication function. / Meter 8 with 5-bit message communication function transmits a start signal based on the power supply voltage Vm to the message conversion device 5. With this start signal, the message conversion device 5 turns on the switch SW3.
Then, a communication state is established between the message conversion device 5 and the meter 8 with a 5-bit message communication function.

The message converter 5 turns the switch SW4 ON / OFF.
The signal is transmitted and received when the meter 8 with the 5-bit message communication function is turned off and the switch 8 is turned on / off by the meter 8 with the 5-bit message communication function, and the message conversion device 5 checks the call information with the meter 8 with the 5-bit message communication function. .

Thereafter, the switch SW3 is turned off by the control operation of the message conversion device 5, and the supply of the power supply voltage Vh to the meter 8 with the 5-bit message communication function is stopped. Then, transmission of the call information from the message conversion device 5 to the center device 1 is performed.

When the center device 1 further transmits the setting / request message to the meter 8 with the 5-bit message communication function, the message converter 5 turns on the switch SW3 again. In this manner, the data communication circuit is configured between the center device 1 and the meter 8 with the 5-bit electronic message communication function, and the transmission and reception of the signal is performed through the electronic message conversion device 5,
This is performed as described above.

At the end of the communication, the switch SW3 is turned off by the control operation of the message conversion device 5, and the supply of the power supply voltage Vh to the meter 8 with the 5-bit message communication function is stopped. Return to).

By using the above-described message conversion device, an 8-bit message-type wireless device A3 (having an input / output terminal for a meter with an 8-bit message-type communication function) can be used.
, Automatic meter reading and terminal calling communication of a meter with a communication function of a 5-bit message terminal are enabled, and signals are transmitted through wireless and public line networks.

Note that the 8-bit electronic radio device A and the 8-bit electronic radio device B in the above-described embodiment are used.
May be a specific low-power wireless device or another wireless device.

The 8-bit electronic message communication device used in the present invention does not need to be the 8-bit electronic message wireless device A as in the above-described embodiment, and as shown in FIG. It may be an 8-bit electronic message type analog public network controller 22 connected to the center device 1 through the analog public network 2.

Further, the 8-bit electronic communication device used in the present invention does not need to be the 8-bit electronic communication device A as in the above-described embodiment, and as shown in FIG. It may be an 8-bit digital public network controller 24 connected to the center device 1 through the digital public network 23.

The 8-bit electronic message communication device used in the present invention does not need to be the 8-bit electronic message device A as in the above-described embodiment, and as shown in FIG. Center device 1 through wireless public network 25
May be an 8-bit electronic radio network controller 26.

Also, the 8-bit electronic message communication device used in the present invention does not need to be the 8-bit electronic message wireless device A as in the above-described embodiment, and as shown in FIG. An 8-bit electronic centralized transmission device 28 connected to the center device 1 through the public network 27 may be used.

Further, the message conversion device used in the present invention does not need to be a device for mutually converting between a 5-bit message signal and an 8-bit message signal as in the above-described embodiment. That is, the telegram conversion device used in the present invention is a first interface unit for transmitting and receiving a first transmission signal, a second interface unit for transmitting and receiving a second transmission signal, and the first transmission signal. A main control unit that performs mutual conversion of the second transmission signal, the main control unit includes:
From the first communication device, the first transmission signal input through the first interface unit is converted into the second transmission signal, to the second communication device, through the second interface unit Output, and from the second communication device, the second transmission signal input through the second interface unit, to convert the first transmission signal, the first communication device, Any message conversion device characterized by outputting through the first interface unit may be used.

[0098]

As is apparent from the above description, the first invention corresponding to claim 1 provides a message conversion device that can be commonly used by various communication devices. Can be.

A second invention corresponding to claim 2 provides a message conversion device capable of transmitting a signal from a communication device to another communication device reliably and smoothly. can do.

A third invention corresponding to claim 3 provides a message conversion device for a 5-bit message communication device that can be commonly used by various 8-bit message communication devices. be able to.

A fourth invention corresponding to claim 4 can provide a data collection system that can be commonly used by various communication devices.

A fifth invention corresponding to claim 5 provides a data collection system for a meter with a 5-bit message communication function that can be used in common by various 8-bit message communication devices. can do.

A sixth invention corresponding to claim 6 is an automatic meter reading system for a meter with a 5-bit electronic communication function having an 8-bit electronic analog communication network controller so that an analog public network can be used. Can be provided.

A seventh invention corresponding to claim 7 is an automatic meter reading system for a meter with a 5-bit electronic communication function having an 8-bit electronic digital network control device so that a digital public network can be used. Can be provided.

An eighth invention corresponding to claim 8 is an automatic meter reading system for a meter with a 5-bit electronic communication system having an 8-bit electronic wireless communication network controller so that a wireless public network can be used. Can be provided.

A ninth invention corresponding to claim 9 has an 8-bit electronic radio device A and an 8-bit electronic radio device B such that a wireless and a public line network or a wireless and a dedicated line can be used. An automatic meter reading system for a meter with a 5-bit electronic communication system can be provided.

A tenth invention corresponding to claim 10 is the fifth invention, wherein the 8-bit electronic radio system A and the 8-bit electronic radio system B are provided with a 5-bit electronic communication function. An automatic meter reading system for a meter can be provided.

An eleventh invention corresponding to claim 11 is an automatic meter reading system for a meter with a 5-bit electronic communication function having an 8-bit electronic centralized transmission device so that a public network or a dedicated line can be used. Can be provided.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a message conversion device described in an embodiment of the present invention.

FIG. 2 is a circuit diagram of an 8-bit message-signal-corresponding interface unit on the 8-bit message-type wireless device A side and an 8-bit message signal-corresponding interface unit (on the message converter) described in an embodiment of the present invention; .

FIG. 3 is a circuit diagram of a 5-bit electronic message signal compatible interface unit with a 5-bit electronic message communication function and a 5-bit electronic signal signal compatible interface unit (on the electronic message conversion device side) described in an embodiment of the present invention. is there.

FIG. 4 is a conceptual diagram of a data collection system using an 8-bit electronic message type analog public network controller described in an embodiment of the present invention.

FIG. 5 is a conceptual diagram of a data collection system that uses an 8-bit electronic digital network controller described in an embodiment of the present invention.

FIG. 6 is a conceptual diagram of a data collection system using an 8-bit electronic message type wireless public network controller described in an embodiment of the present invention.

FIG. 7 is a conceptual diagram of a data collection system using an 8-bit electronic message centralized transmission device described in an embodiment of the present invention.

FIG. 8 is a list diagram in which features of a 5-bit message signal and an 8-bit message signal are described in comparison.

FIG. 9 is a configuration diagram of a conventional 5-bit / 8-bit transmission device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Center apparatus 2 Analog public circuit network 3 8-bit message type radio apparatus A 4 8-bit message signal corresponding interface unit 5 Message conversion device 6 Main control unit 7 5-bit message signal corresponding interface unit 8 Meter with 5-bit message type communication function 9 8-bit message-type wireless device B 10 Center device 11 Analog public line network 12 Network control unit 13 Modulation / demodulation unit 14 5-bit / 8-bit common transmission device 15 Main control unit 16 5-bit message-signal-compatible interface unit 17 5-bit message-type communication Meter with function 18 8-bit message signal interface unit 19 Meter with 8-bit message communication function 20 Telephone 21 Connection unit 22 8-bit message analog analog public network controller 23 Digital public circuit 24 Digital 8-bit digital public circuit Controller 25 Wireless public network 26 8-bit message type wireless public network controller 27 public line network 28 8-bit message centralized transmission device

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Shoji Yamaguchi 4-1-2, Hirano-cho, Chuo-ku, Osaka-shi, Osaka Inside Osaka Gas Co., Ltd. (72) Inventor Noriaki Iwamoto, Hirano-cho, Chuo-ku, Osaka-shi, Osaka Osaka Gas Co., Ltd. 4-72 1-2 Osaka Gas Co., Ltd. (72) Inventor Tatsuya Mitsui Osaka Gas Co., Ltd. 4-1-2 Hirano-cho, Chuo-ku, Osaka-shi, Osaka

Claims (11)

[Claims] 1. A first interface unit for transmitting and receiving a first transmission signal, a second interface unit for transmitting and receiving a second transmission signal, and an interface between the first transmission signal and the second transmission signal. A main control unit that performs conversion, the main control unit converts the first transmission signal input from the first communication device through the first interface unit to the second transmission signal. And outputting to the second communication device through the second interface unit, and transmitting the second transmission signal input from the second communication device through the second interface unit to the first communication device. The message conversion device according to claim 1, wherein the transmission signal is converted to a transmission signal and output to the first communication device through the first interface unit. 2. A signal for confirming the contents of the call in response to a start signal which is input from the second communication device and notifies the start of a call of the second communication device. Is output to the second communication device, and the content of the call of the second communication device included in the signal input thereto from the second communication device is stored, and the content of the call is 2. The message conversion device according to claim 1, wherein the message is output to the first communication device. 3. The first interface unit is an 8-bit message signal compatible interface unit for transmitting and receiving an 8-bit message signal, and the second interface unit is compatible with a 5-bit message signal for transmitting and receiving a 5-bit message signal. 3. The message conversion device according to claim 1, wherein the device is an interface unit, and the main control unit performs mutual conversion between a 5-bit message signal and an 8-bit message signal. 4. 4. The message conversion device according to claim 1 or 2, a first communication device for transmitting and receiving a first transmission signal; a second communication device for transmitting and receiving a second transmission signal; A data collection system comprising a communication device and a center device for transmitting and receiving signals. 5. The message conversion device according to claim 3, wherein the first communication device is an 8-bit message communication device that transmits and receives an 8-bit message signal, and The communication device transmits and receives a 5-bit message signal.
5. The data collection system according to claim 4, wherein the data collection system is a meter with a bit message communication function. 6. The data collection system according to claim 5, wherein said 8-bit telegram communication device is an 8-bit telegram analog public network controller connected to an analog public network. 7. The data collection system according to claim 5, wherein the 8-bit electronic message communication device is an 8-bit electronic digital network control device connected to a digital public network. 8. The data collection system according to claim 5, wherein said 8-bit message communication device is an 8-bit message wireless public network controller connected to a wireless public network. 9. The 8-bit message communication device is an 8-bit message wireless device A, and the wireless device A is wirelessly connected to a different 8-bit message wireless device B. 6. The data collection system according to claim 5, wherein the message-type wireless device B is connected to a public line network or a dedicated line. 10. The data collection system according to claim 9, wherein the 8-bit message-type radio device A and the 8-bit message-type radio device B are specific low-power radio devices. 11. The data collection system according to claim 5, wherein said 8-bit electronic message communication device is a centralized 8-bit electronic message transmission device connected to a public network or a dedicated line.