JP2000224324A - Radio type terminal network controller - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the consumption of a battery in a wireless automated metering system by turning a part between a power supply terminal and a power source terminal to the state of non-contact or high resistance in an initial state. SOLUTION: In the initial state, the part between the power supply terminal and the power source terminal is turned to the state of the non-contact or the high resistance. The built-in power source of the slave unit of this radio type terminal side network controller (NCU) is the batteries BAT1 and BAT2 and the positive side of the BAT1 and BAT2 is protected by a diode D2 and is not charged. A current from an external power source 49 is supplied to the inside of the slave unit of the radio type NCU when lead wires W2 and W3 are connected to a terminal base 51. The external power source 49 is also protected by the diode D1 and is not charged from the built-in batteries. The negative side of the built-in batteries is connected to a power supply line (power supply terminal) W1. No matter which terminal the power supply terminal W1 is brought into contact with, the batteries are not damaged by the protective diodes D1 and D2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wireless terminal network controller, and more particularly to an ISDN (Integrated Services).
Digital Network) and data communication between the center-side control device and a meter with communication function (using automatic meter reading with a meter or sensor such as LP gas, city gas, electric power, water, etc.) using a general public line. The present invention relates to a wireless terminal network control device used in an automatic meter reading system for performing data conversion.

[0002]

2. Description of the Related Art Conventionally, there has been an automatic meter reading system for sending data such as a result of automatically reading a meter such as gas, electric power, and water with a sensor or the like, and data such as gas leak to a center side control device via a telephone line network. Used. Recently, ISDN has been used in telephone networks, and higher-speed communication has been performed.

FIGS. 12 and 13 are block diagrams showing a configuration of a conventional automatic meter reading system using a public line or ISDN. FIG. 12 is a diagram showing an automatic meter reading system using a general public line and a no-ringing trunk for a telephone line.

[0004] Referring to FIG.
In FIG. 1, the host device 1 and the center-side network control device 2 are connected by wire. Terminal device 20 installed in the customer
0, the terminal side network controller (hereinafter referred to as “NCU”) 6
, Meter 8, home telephone 7, and security device 9
Are connected by wire. The meter 8 has an interface of a photocoupler. The security device 9 is of a photocoupler type or a contact input type.

[0005] Center device 100 and terminal device 2
Reference numeral 00 denotes a telephone line 10 which is a general public line, a center-side exchange 3 and a terminal-side exchange 4 provided with a no-ringing trunk 5.

When the meter reading is performed from the center apparatus 100, the NCU 6 can be activated by the no-ringing trunk 5 without reading the bell of the home telephone 7 to read the value of the meter 8.

FIG. 13 is a block diagram showing an automatic meter reading system using ISDN in a telephone network. Referring to the figure, in the center-side device 102, the host device 1
The SDN 13 and a terminal adapter (hereinafter referred to as “TA”) 11 for matching input / output conditions are connected.
TA11 includes a digital signal transmitting / receiving device, DSU.
(Digital Service Unit) 12 is connected.

On the other hand, the terminal device 20 installed at the customer
2, the DSU 14 connected to the ISDN 13 has the TA1
5 is connected. A general-purpose personal computer 17, a facsimile (FAX) 16, and the like are connected to the TA 15.
U6 is connected.

The NCU 6 includes an electronic meter 8 for LP gas, city gas, electric power, and water, and a security device 9.
And the home telephone 7 are connected. Where NCU6
Is basically a direct ISDN to handle analog signals.
13 cannot be connected. Therefore, by converting a digital signal into an analog signal in TA15, T15
NCU6 is ISDN via analog port of A15
13.

From the center-side device 102, the meter value can be read by designating the NCU 6 connected to the analog port. All of the above-described devices are wired.

FIG. 14 is a block diagram showing an internal configuration of NCU 6 shown in FIG. The NCU 6 includes a reciprocity detecting circuit 18 for detecting a reciprocal signal, a rectifier circuit 19, an off-hook control circuit 20, a PB transmitting and receiving circuit 21 for transmitting and receiving a PB (push button) signal, and a main controller 23 having a microcomputer. A connection switching circuit 26 for connecting or disconnecting the line, a modem 22 for a voice band signal, an off-hook detection circuit 25 for detecting the usage status of the home telephone 7, and an input / output for controlling the input / output of the meter 8. A circuit 24, an oscillation circuit 28 composed of a crystal oscillator or the like,
A reset circuit 30 resets the main controller 23 as necessary, an EEPROM 27 for storing data for operating the main controller 23, and a power supply circuit 29 (including a battery).

When the telephone line connected to the NCU 6 is a general public line, the NCU 6
Is connected to the terminal-side exchange 4 having. Telephone line is ISD
In the case of N, the NCU 6 is connected to the analog port of the TA 15 and can communicate with the center-side device.

[0013]

[0005] Due to housing conditions in urban areas, wiring problems in wired communication in an automatic meter reading system have become apparent. When constructing a new house, it is possible to perform wiring work from the beginning, but when performing wiring work in an existing house, it is necessary to make holes in the wall or permission is required. Or, when you move out, it may be necessary to restore it.
Therefore, it may not be possible to easily carry out facility construction of the automatic meter reading system, which may hinder meter reading.

Further, the trouble of wiring work between the NCU 6 and the meter 8 cannot be neglected especially in an apartment house. Furthermore, even in an existing house, if there is exposed wiring, the appearance will be poor and it will be annoying.

As described above, in the automatic meter reading system using the no-ringing trunk and the automatic meter reading system using the ISDN, wiring work by wire is a major obstacle. Further, when an analog port of ISDN is used, there is a problem that the communication speed is low, so that the high-speed digital communication characteristic is not utilized.

In order to solve such a problem, an automatic meter reading system using a wireless system is desired. However, in wireless reception and transmission, the current consumption is greater than the current consumption in meter reading.
6 greatly affects the battery life.

The present invention has been made to solve the above-mentioned problems, and has as its object to provide a wireless automatic meter reading system for reducing wiring work indoors and outdoors.

Another object of the present invention is to improve the power supply to the NCU.

[0019]

According to one aspect of the present invention to achieve the above object, a wireless terminal network control device is a device for transmitting a meter reading result of a meter to a device on a center side by wireless. A built-in battery having a power supply terminal, and a power supply terminal for supplying power to the device,
In the initial state, the power supply terminal and the power supply terminal can be brought into a non-contact or high-resistance state.

According to the present invention, the power supply terminal and the power supply terminal can be brought into a non-contact or high-resistance state in the initial state, so that the power supply can be improved in the wireless terminal network control device. Can be.

Preferably, in an initial state, the power supply terminal is covered with an insulator.

When the power supply terminal is covered with the insulator as described above, the power supply terminal and the power supply terminal can be easily brought into a non-contact state.

Preferably, the wireless terminal network control device further includes a meter connection terminal for connecting to a meter, and in an initial state, the power supply terminal is connected to the meter connection terminal to thereby load the internal battery. Is characterized by being maintained in a high resistance state.

With this configuration, it is possible to easily maintain the load of the built-in battery in a high resistance state, and it is possible to improve the power supply.

Preferably, the power supply terminal and the power supply terminal are covered by a removable lid.

With this configuration, it is possible to easily change the connection between the power supply terminal and the power supply terminal during construction.

According to another aspect of the present invention, a wireless terminal network control device wirelessly receives a signal from a slave unit connected to a meter, and sends a meter reading result of the meter to a center device using an ISDN line. A transmitting apparatus, wherein an ISDN line control unit and a wireless transmitting / receiving unit are integrally configured.

As described above, when the ISDN line control unit and the radio transmission / reception unit are integrally formed, wiring work indoors and outdoors can be reduced.

[0029]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A wireless terminal network controller (wireless NCU) according to an embodiment of the present invention will be described with reference to FIGS.

Wireless NCU according to an embodiment of the present invention
Consists of a wireless NCU master unit and a wireless NCU slave unit. The wireless NCU master unit includes a D-channel communication unit, an impedance matching circuit connected to the TA, a main controller for controlling the communication between them, a wireless circuit, and the like.

The wireless NCU slave unit has a meter input / output circuit,
It consists of a meter connection terminal, a wireless circuit, a power supply circuit, and the like. In the wireless NCU configured as described above, the state between the power supply terminal and the power supply terminal of the built-in battery can be set in a non-contact or high-resistance state. In addition, unnecessary consumption of the battery of the wireless NCU slave in the initial state can be eliminated.

<First Embodiment> A wireless NCU according to a first embodiment of the present invention will be described in detail with reference to FIGS.

FIG. 1 shows a wireless NC according to the present embodiment.
FIG. 2 is a diagram showing a system configuration of U. Referring to the figure, the wireless NCU includes a wireless NCU master unit 56 and a wireless NCU slave unit 55.

In FIG. 1, the wireless NCU slave unit 55 to which the meter 8 is connected transmits a signal from the meter 8 to the wireless circuit 3.
1b to the wireless NCU master unit 56.

The wireless NCU master unit 56 has a program storage unit, a data storage unit, and a digital signal processing unit, and has a main control unit 3 composed of a microcomputer for controlling the device.
4, a D-channel communication unit 33 for performing communication using an ISDN line, an impedance matching circuit 41 connected to the TA 15, and a modular input / output terminal 3 which is a terminal of the D-channel communication unit 33 and the impedance matching circuit 41.
9, a power supply unit 35 for supplying power from a commercial power supply 36,
Ground terminal 47 and EEPRO for recording programs, etc.
M27a, an oscillation circuit 28a, a power supply circuit 29a, a reset circuit 30a, a display circuit 42 for displaying an operation of the device, a wireless circuit 31a for performing communication via an antenna 50, and connection to the security device 9. And a security device terminal 9a.

The D-channel communication section 33 is connected to the DSU 14 via a modular input / output terminal 39.

The main controller 34 is connected to a setter terminal 37 for performing an initial setting from outside.

Since the telephone line input part is digital,
The analog circuit of the related art shown in FIG. 14, such as the polarity rejection detection circuit 18, the rectification circuit 19, the PB transmission / reception circuit 21, and the like are unnecessary, and the D-channel communication unit 33 and the impedance matching circuit 41 are replaced by the main control unit. 34 is connected.

By using the call control signal in ISDN, a device capable of only D-channel communication can be used as the wireless NCU master unit 56. Therefore, since there is no complicated B-channel control portion, the entire apparatus can be reduced in size, and a highly reliable product can be manufactured at low cost.

The wireless NCU slave unit 55 is installed near the meter 8. The wireless NCU slave unit 55 and the meter 8 are connected by wire. The main power supply of the wireless NCU slave unit 55 is a battery, and an external power supply 49 can be connected as a sub power supply.

The wireless NCU slave unit 55 stores a main controller 32 for controlling the entire apparatus, an input / output circuit 24 for inputting a signal from the meter 8 and transmitting a signal to the meter 8, a program and the like. It comprises an EEPROM 27b, an oscillation circuit 28b, a power supply circuit 29b capable of supplying power from an external power supply 49, a reset circuit 30b, and a radio circuit 31b for communicating via an antenna 40.

In the wireless NCU slave unit 55, when the battery is turned on, even if the microcomputer of the main control device 32 maintains the standby state (standby mode), wasteful power is consumed during the stock period. Consume it. Further, in an operation mode in which wireless transmission and reception are performed, a considerable amount of current consumption is increased as compared with a current when meter reading is performed. From a long-term perspective, battery life is limited, so anticipating external power supply will lead to an increase in the overall system operation rate.

On the other hand, the wireless NCU master unit 56
4, the commercial power supply 36 can be used. However, an analog connection with the TA 15 is required. The wireless NCU master unit 56 decodes the high-frequency signal and transmits data to the center-side host device 1 (see FIG. 13) via the ISDN.

FIG. 2 is a block diagram showing a more detailed circuit of the wireless NCU slave unit 55. For example, a city gas meter is connected to the terminal numbers (1) and (2) of the terminal block 51 (corresponding to a part of the input / output circuit 24 in FIG. 1). Although the city gas meter is a two-wire type, it has a polarity and must be connected to a predetermined terminal. For example, an orange signal line which is one of the polarities of the city gas meter is connected to the terminal of the terminal number (1), and a black signal line is connected to the terminal of the terminal number (2).

These two terminals are connected to photocouplers PC1 and PC2 built in the wireless NCU slave unit. The photocoupler PC2 is a photocoupler for transmitting from the wireless NCU slave to the meter. The light emission current is controlled by the resistor R1.

The photocoupler PC1 is a photocoupler for receiving a signal from the meter. The resistor R2 is a load of a photocoupler signal, and a signal from the photocoupler PC1 is input / output to a microcomputer as the main control device 32.

The built-in batteries of the wireless NCU slave unit 55 are batteries BAT1 and BAT2. These batteries BAT1, BAT
The positive side of 2 is protected by a diode D2 so that it is not charged. When the lead wires W2 and W3 are connected to the terminal block 51, the current from the external power supply 49
Supplied inside the wireless NCU slave unit. The external power supply 49 is also protected by the diode D1 and is not charged from the built-in battery.

The negative side of the internal battery is connected to a power supply line (power supply terminal) W1. This power supply line W
Even if 1 contacts any terminal of the terminal block 51, the battery will not be damaged by the protection diodes D1 and D2.

Since the terminals of the terminal numbers (1) and (2) are connected to the secondary side of the photocoupler, they have extremely high impedance. Therefore, even if the power supply line W1 is connected to these terminals, almost no current flows, and current consumption can be ignored.

Even if the power supply line W1 is connected to the terminal of the terminal number (4) of the terminal block 51, the protection diode D1 allows
Since the battery has an extremely high impedance when viewed from the battery side, current hardly flows and current consumption can be ignored.

The current is supplied to the regulator 52, which is a stabilized power supply IC, via the diodes D1 and D2, and the power of VCC is supplied to each circuit from the output.
Since the wireless circuit 31b has a built-in circuit for a stabilized power supply and a power supply transistor (not shown), the power supply can be directly turned on.

The EEPROM 27b stores a wireless password, a meter reading, and the like. At power on,
When the battery voltage drops, the IC serving as the reset circuit 30 operates, and a trigger signal is given to the main controller 32.

The signal transmitted from the meter is decoded by main controller 32, sent to radio circuit 31b, and transmitted as a high-frequency radio signal from antenna 40 to the radio NCU master unit.

FIG. 3 is a diagram showing the appearance of the wireless NCU master unit 56. 3A shows a right side view, FIG. 3B shows a rear view, and FIG. 3C shows a left side view.

Referring to FIG. 3, the main body 58 and the lid 59 are fixed with special screws 43a so that the internal radio circuit 31a cannot be easily disassembled from the outside based on the Radio Law.

As described above, the wireless NCU master unit 56
Are provided with a commercial power supply 36, an antenna 50, a modular input / output terminal 39, a security device terminal 9a, a setting device terminal 37, and a ground terminal 47.

The impedance matching circuit 41 (FIG. 1)
The impedance matching switch 41a included in the wireless NCU master unit 56 is attached to the wireless NCU master unit 56.

FIG. 4 is a rear view showing the appearance of the wireless NCU slave unit 55. As shown in FIG. 4, the lid is fixed with a special screw 43 so that the internal wireless circuit 31b cannot be easily disassembled from the outside based on the Radio Law.

FIG. 5 is a front view showing the appearance of the wireless NCU slave unit 55. As shown in FIG.
Is fixed with special screws and cannot be easily removed. An easily removable lid 46 is provided below the main body cabinet 45. Since the lid 46 is fixed by the general screw 44 for the lid, the lid can be easily removed.

FIG. 6 is a view showing a state where the lid 46 shown in FIG. 5 is removed. 6, only terminal block 51, power supply line W1, and part of substrate 48 are exposed when lid 46 is removed. The left side of the terminal block 51 is the main body cabinet 45.
It has the same structure as the above, and is hollow so that the components and patterns of the built-in substrate can be used effectively.

However, since the lid 46 can be easily opened, the cabinet is shielded by using this cabinet so that the electronic circuit is not affected by static electricity or the like. The portion surrounded by the dotted line in FIG. 2 corresponds to the circuit portion exposed in FIG.

In FIG. 6, the terminals of the terminal numbers (1) to (4) in FIG.

Internal battery BAT of wireless NCU slave unit 55
1. BAT2 is a long-life lithium battery. The negative side of this battery is connected to the power supply line W1 (FIG. 2).
reference).

The power supply line W1 also functions as a power switch. For example, when the wireless NCU slave unit 55 is shipped from the factory, the power supply line W1 is connected to the city gas meter terminal (terminal number (1) or (2)). As can be seen from the circuit diagram shown in FIG.
1 is the terminal number (1), (2) or (4) of the terminal block 51
No power is consumed by the internal battery.

This corresponds to a state where the power switch is turned off. When the wireless NCU slave unit 55 is installed, the power supply line W1 is connected to the terminal (the external power supply (-)) of the terminal number (3) of the terminal block 51. As a result, the power switch is turned on. By configuring the apparatus in this manner, it takes time and labor to replace the wiring of the power supply line W1 to the terminal block in the installation work, but this is not a problem when viewed from the wiring work at the meter terminal. Absent.

FIG. 7 is a diagram showing an initial setting sequence when a wireless NCU is installed. Referring to FIG. 7, center device 100, NCU master unit 56, and NCU slave unit 55
Communication is performed with the. First, the wireless NCU master unit 5
When the power is turned on to the LED 6, the LED serving as the power lamp included in the display circuit 42 blinks (S1). The blinking is also a signal for prompting the initial data since the initial data has not been set in the wireless NCU master unit 56 yet.

Center device (center-side control device) 10
From 0, initial data is transmitted to the wireless NCU master unit 56 via the telephone line (S5). Even when a setting device (not shown) is connected to the setting device terminal 37 provided on the terminal block 53 of the wireless NCU master device 56, data can be set in the same manner.

When the initial value is set in NCU master unit 56, a response is sent to center device 100 (S7).

When power is supplied to the wireless NCU slave unit 55 (S3), an initial value setting request message is transmitted to the wireless NCU master unit 56 (S9). Wireless NCU master unit 5
The above routine is repeated until the initial value setting from step 6 is completed.

Upon receiving the initial value setting request (S9) from wireless NCU slave unit 55, wireless NCU master unit 56 sets the initial values (S11). When the initial value is set, an initial value setting response is sent from the NCU slave unit 55 to the NCU master unit 56 (S13), and in response to this, the wireless NCU master unit 56 causes the wireless NCU slave unit 55 to respond. The initial value setting confirmation signal is transmitted to (S15).

When the initial value is set, the wireless NCU master unit 56 switches the LED from blinking to lighting (S17). Thereby, the synchronization setting is completed also in the NCU slave unit 55 (S19).

The wireless NCU slave unit 55 intermittently receives a signal from the wireless NCU master unit 56 at regular time intervals, for example, every 30 seconds, and transmits the signal between the wireless NCU master unit 56 and the wireless NCU slave unit 55. Confirm that the communication path has been established.

When a communication path has been established, the LED
Keeps lighting. If a communication channel cannot be established, LE
D shifts to blinking, and a communication operation is performed so that it can be established again.

FIG. 8 is a diagram showing a schematic sequence of communication when performing meter reading. FIG. 8 shows a sequence when meter reading is performed from the host device on the center side, and FIG. 9 shows a sequence when some information is communicated from the meter side to the center side.

Referring to FIG. 8, when a meter reading request is transmitted from center device 100 to wireless NCU master unit 56 via ISDN, the content is transmitted to wireless NCU slave unit 55, and further transmitted to meter. 8 is sent. A telegram is transmitted from the meter 8 in a direction opposite to the above-described flow. As a result, the center device 100 can acquire the meter reading from the meter.

As shown in the figure, when a request for meter reading is sent from the center device 100 to the wireless NCU master unit 56, a response signal is output from the wireless NCU master unit 56 to the center device 100. Also, the meter 8 and the NCU slave unit 5
When the meter reading value is output from 5, the meter reading end signal is returned as a response.

Referring to FIG. 9, when some information is communicated from the meter side to the center side, a message is first transmitted from meter 8 to wireless NCU slave unit 55. Thereafter, the message is transmitted from the wireless NCU slave unit 55 to the wireless NCU master unit 56. The message is transmitted from the wireless NCU master unit 56 to the center device 100 via the ISDN.

Signals are transmitted and received wirelessly between the wireless NCU master unit 56 and the wireless NCU slave unit 55. on the other hand,
I between the wireless NCU master unit 56 and the center device 100
Transmission / reception using SDN is performed.

<Second Embodiment> Subsequently, a second embodiment of the present invention will be described.
FIG. 10 shows a wireless NCU device according to the present embodiment.
This will be described in detail with reference to FIG.

Since the schematic configuration of the wireless NCU in this embodiment is the same as that of the first embodiment, description thereof will not be repeated, and only different portions will be described below.

FIG. 10 is a view showing a state where the cover 46 shown in FIG. 5 is removed. In FIG. 10, only a part of the terminal block 51, the power supply line W1, and the substrate 48 is exposed.

The power supply line W1 is covered with an insulating coating 61 made of resin. In this case, the power supply line W1
Can be kept free since there is no risk of short circuit with the terminal block 51. Thereby, the workability of the assembly in the factory and the workability of the on-site wiring work are improved.

That is, when the wireless NCU slave unit is installed at the site, the insulating coating 61 is peeled off, and the power supply line W1 is connected to the terminal of the terminal block 51 with the terminal number (3).

FIG. 11 is a view showing a state in which all external power lines, meter lines, and power supply lines W1 have been wired in installation work, with the lid 46 removed.

As described above, when the wireless NCU slave unit is installed, the power supply line W1 is connected to the terminal of the terminal block 51 with the terminal number (3). Also, terminal number (1)
A city gas meter is connected to the terminals of (2) and (2), and an external power supply is connected to the terminals of terminal numbers (3) and (4).

Further, since the power supply line W1 is fastened to the negative pole side of the cord from the external power supply, it is desirable that the length of the screw on the terminal block be set in consideration of this.

[Effects of Embodiment] According to the above-described embodiment, the following effects can be obtained.

First, according to the first embodiment, the wireless NC in the initial state is connected to the power supply line W1 of the internal battery.
Unnecessary consumption of the battery of the U slave unit can be completely eliminated. This has the economic effect of saving the internal battery.

Further, a single electric wire can serve as a switch for the built-in battery.
It is possible to provide an NCU that is less expensive than when it is provided in the slave unit. In addition, by using the power supply line W1, the area occupied by the substrate can be made much smaller than when a switch is employed, and the substrate can be used effectively.

According to the second embodiment, the power supply line W
1 employs a coating structure of an insulating resin, so that during the production in a factory, the work of applying the coating and the work of soldering to the board can be performed separately, so that efficient work is possible. .

Further, since the power supply line W1 can be shipped with the power supply line W1 free, the assembly work time can be reduced. Further, even if the power supply line W1 may come into contact with another component, the insulation property can be maintained.

[0092] Also, when performing installation work,
Since wiring work can be performed only by removing the coating, efficient work is possible.

In the first embodiment, since the power supply line W1 is connected to the secondary side of the photocoupler, for example, as shown in FIG. 6, the power supply line W1 is prevented from vibrating during transportation. Is done.

Further, in the above-described embodiment, the lid 46 is taken into consideration while improving the workability of wiring work and complying with the Radio Law.
Can be removed, thereby improving the efficiency of wiring work on site. Also, considering the outdoor installation conditions, the provision of the lid 46 is effective in preventing insulation deterioration and short-circuiting in the wiring work portion.

Further, in the above-described embodiment, since the external power supply terminal is provided in the wireless NCU slave unit, the wireless NCU can be supplied with power from the external power supply terminal even when the internal battery is exhausted. Can work. Therefore, it can be used almost permanently as equipment.

In the above-described embodiment, the ISD
Since the ISDN device and the wireless transmission / reception unit of the NCU are integrated so as to eliminate the TA in the wiring work between the N device and the NCU, the on-site wiring workability is improved. Further, since the terminal-side device can be configured only with a simple device that handles only the D-channel signal, the installation configuration is simplified.

Further, since data between the DSU 14 and the DSU 14 is digital, the S / N ratio can be improved in communication as compared with the case where analog data communication using the TA 15 is employed. Further, since the wiring is changed from analog to digital, the reliability of communication is improved. Further, since the communication speed is changed from a conventional analog modem to a digital one, it can be greatly improved.

Further, in the above-described embodiment, since wireless communication is employed, the installation place is free, and the installation work is facilitated.

The embodiments disclosed this time are to be considered in all respects as illustrative and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

[Brief description of the drawings]

FIG. 1 shows a wireless NC according to a first embodiment of the present invention.
FIG. 2 is a block diagram showing a system configuration of U.

FIG. 2 is a block diagram showing a configuration of a wireless NCU slave unit 55 of FIG.

FIG. 3 is a diagram illustrating an appearance of a wireless NCU master unit.

FIG. 4 is a rear view showing the appearance of the wireless NCU slave unit.

FIG. 5 is a front view showing the appearance of the wireless NCU slave unit.

FIG. 6 is a view showing a state where a lid 46 of FIG. 5 is removed.

FIG. 7 is a diagram showing an initial value setting sequence when a wireless NCU is installed.

FIG. 8 is a diagram showing a schematic sequence when meter reading is performed from the center device 100.

FIG. 9 is a diagram showing a schematic sequence in a case where meter reading is performed from a meter 8.

FIG. 10 is a diagram showing a state in which a lid 46 is removed in the second embodiment.

FIG. 11 shows a cover 46 of a wireless NCU slave unit during installation work.
It is a figure which shows the state which removed.

FIG. 12 is a block diagram of a conventional automatic meter reading system using a telephone network.

FIG. 13 is a block diagram showing a configuration of a conventional automatic meter reading system using ISDN.

FIG. 14 is a block diagram showing the internal configuration of a conventional NCU 6.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Host apparatus 2 Center side network control unit 3 Center side switching center 4 Terminal side switching office 5 No ringing trunk 6 Terminal side network control unit 7 Home telephone 8 Meter 9 Security equipment 10 General telephone line 11 Center side TA 12 Center side DSU 13 ISDN 14 terminal side DSU 15 terminal side TA 16 facsimile 17 personal computer 18 polarity reversal detection circuit 19 rectifier circuit 20 off hook control circuit 21 PB transmission / reception circuit 22 modem 23 main controller 24 input / output circuit 25 off hook control circuit 26 connection switching circuit 27 EEPROM 28 Oscillation circuit 29 Power supply circuit 30 Reset circuit 31a, 31b Wireless circuit 32 Main controller of wireless NCU slave unit 33 D-channel controller 34 Main controller of wireless NCU master unit 35 Power supply unit 36 Commercial power supply 3 Setter terminal 39 Modular input / output terminal 40 Antenna 41 Impedance matching circuit 42 Display circuit 43a, 43b Special screw 44 General screw 45 Main body cabinet 46 Lid (lid) 47 FG (ground terminal) 48 Board 49 External power supply 51 Terminal block 52 Regulator 53 Terminal block 55 Wireless NCU slave unit 56 Wireless NCU master unit 58 Main body 59 Lid 61 Insulation coating

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2F073 AA07 AA08 AA09 AB05 BB01 BC02 EE11 5K067 AA41 AA43 BB27 GG01 HH05 KK05 5K101 KK12 LL03 LL11 MM07 NN45

Claims (5)

[Claims] 1. A wireless terminal network control device for transmitting a meter reading result of a meter to a device on a center side by wireless, comprising: a built-in battery having a power supply terminal; and a power terminal for supplying power to the device. A wireless terminal network control device, characterized in that, in an initial state, the power supply terminal and the power supply terminal can be brought into a non-contact or high-resistance state. 2. In the initial state, the power supply terminal is covered with an insulator.
3. The wireless terminal network control device according to claim 1. And a meter connection terminal for connecting to the meter, wherein in the initial state, the power supply terminal is connected to the meter connection terminal, so that a load of the built-in battery has a high resistance. The wireless terminal network control device according to claim 1, wherein the wireless terminal network control device is maintained in a state. 4. The power supply terminal and the power supply terminal are covered with a removable lid.
The wireless terminal network control device according to claim 1. 5. A wireless terminal network controller for wirelessly receiving a signal from a slave unit connected to a meter and transmitting a meter reading result of the meter to a device on the center side using an ISDN line. A wireless terminal network control device, wherein the unit and the wireless transmission / reception unit are integrally configured.