JPH08125767A - Terminal network controller - Google Patents

Abstract

PURPOSE: To obtain a terminal network controller where radio communication is possible and the mounting of a battery is unnecessary. CONSTITUTION: In a terminal network controller 1, a radio communication means 2 intermittently performs radio communication. As the power source for the radio communication, a line power storage means 22 stores the power of a line when the radio communication means 2 is suspended. A line power supply means 23 supplies the stored power when the radio communication means 2 operates. Also when the communication between a first terminal 100 and a second terminal 101 is performed, a data communication means 3 and a radio communication means 2 receive power supply from the line by a line power source means 18 and the means operate.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention wirelessly connects a first terminal such as a metering device such as a gas meter, a water meter, an alarm, or a security device, and a second terminal such as a gas supply company or a security company. By connecting to the (monitoring center) via a communication line and relaying communication between the second terminal and the first terminal, automatic remote meter reading from the second terminal or from the first terminal to the second terminal can be performed. The present invention relates to a terminal network control device for making a gas leak report to a terminal, and more particularly to a terminal network control device using a battery as a power source.

[0002]

2. Description of the Related Art A current terminal network control device has a means for connecting to a first terminal with a metal cable, but a means for communicating by wireless connection has been studied in order to save the labor of installation work. This terminal network control device connected by a metal cable is described as an old terminal network control device in order to distinguish it from the terminal network control device of the present invention.

Now, the old terminal network control device which is connected to the first terminal for automatic meter reading and reporting by a metal cable uses a lithium battery as a power source. The expiry date of a gas meter or the like is 7 years or 10 years, and the terminal network control device is designed so that it can be used with a battery for the same period.

Means for wirelessly connecting to the first terminal are currently
The old terminal network control device connected to the first terminal with a metal cable is used, and the first terminal and the old terminal network control device are provided with a wireless communication means (wireless adapter) for converting communication using the metal cable into wireless communication. The form of connection is adopted. Therefore, this wireless adapter is also equipped with a battery as a dedicated power source.

An old terminal network control device using such a battery as a power source is usually equipped with a battery voltage drop detecting means and is provided with means for notifying a second terminal when the voltage level of a predetermined battery falls. Has been. Similarly, the battery voltage drop detecting means is also mounted on the wireless adapter, and is provided with means for notifying the second terminal via the old terminal network control device. Further, the gas meter, which is one of the first terminals, also operates using a lithium battery as a power source.

As a power source for the old terminal network control device connected to the first terminal via a metal cable, a power source mode in which electric power supplied from an exchange through a telephone line and electric power from a battery are used together has already been put into practical use. Has been converted. For example, Japanese Patent Application Laid-Open No. 63-180262 discloses a means for using the power supplied from an exchange through a telephone line as a power source for an old terminal network control device using a DC / DC converter.
Further, Japanese Laid-Open Patent Publication No. 3-220850 discloses a means for operating in an old terminal network control device capable of connection with no-ringing communication by using electric power supplied from an exchange through a telephone line together.

The form in which the lithium battery is used as the power source of the wireless communication adapter has already been described. The current wireless technology is
In order to transmit and receive, a large power of about 40 mA is required at a power supply voltage of 3.5V.

[0008]

The conventional technique as described above has the following problems.

(1) Installation of two devices, the old terminal network control device and the wireless adapter, and a work for connecting the two devices with a metal cable are required, which is troublesome. The battery is separately mounted on the old terminal network control device and the wireless adapter, which is expensive. In addition, the old terminal network control device and the wireless adapter must be equipped with a communication protocol for individually grasping the battery voltage drop and a display function for the second terminal to grasp.

(2) When the battery voltage of the old terminal network control device drops, wireless communication with the first terminal is possible, but communication with the second terminal is not possible and there is a risk that the battery voltage drop cannot be reported. There is.

(3) A battery with a large capacity is required as a power source for the wireless adapter, and the cost is high.

(4) Management of battery voltage drop, and when battery voltage drop occurs, replacement work must be performed.

In view of the above, the present invention eliminates the need for the installation work of the wireless adapter and the old terminal network control device, and can centrally manage the management of the voltage drop of the battery which is the power source of the wireless adapter and the old terminal network control device. First to provide a control device
The purpose of.

A second object of the present invention is to provide a terminal network control device using a battery as a power source, which can reliably notify the battery voltage drop of the wireless adapter.

A third object is to provide an inexpensive terminal network control device capable of mounting a battery having a small capacity.

A fourth object is to provide a terminal network control device which does not use a battery as a power source.

[0017]

In order to achieve the above first object, a terminal network control device of the present invention comprises a wireless communication means for performing wireless communication with a first terminal, a second terminal and a data terminal. Data communication means for communication, shared battery power supply means for supplying electric power to wireless communication means and data communication means by using a battery, and request to detect abnormality of battery and report abnormality to data communication means It is provided with a power supply abnormality reporting means.

A first means for achieving the second object is a terminal provided with shared battery power supply means and provided with data communication means operating at a voltage lower than a minimum voltage value of a battery in which the wireless communication means can operate. It is a network controller.

A second means for achieving the second object is a battery power supply means for supplying battery power as a power supply and a line power supply means for powering the power supplied from the exchange through a telephone line. The terminal network control device is provided with a separate power supply unit that uses a battery power supply unit as a power supply for the wireless communication unit and a line power supply unit as a power supply for the data communication unit.

A first means for achieving the third object is a complementary type in which power is supplied from the line power supply means to the wireless communication means and the data communication means and the shortage of power is supplied from the battery power supply means. It is a terminal network control device provided with a power supply means.

The second means for achieving the third object is the third means.
As a line power supply means for a terminal network control device that achieves the above object, a line power storage means for drawing and storing power from a telephone line within a range in which the data communication means can make impedance matching with the line both during communication and during non-communication. And a stored power supply means that uses the stored power as a power source.

To achieve the fourth object, wireless communication means for intermittently performing wireless communication, line power storage means, and stored power supply means for supplying the stored power to the wireless communication means and data communication means. It is equipped with and.

[0023]

To achieve the first object, in the terminal network control device of the present invention, the shared battery power source means supplies the battery power to the data communication means and the wireless communication means. Then, the power supply abnormality reporting means reports the abnormality of the battery to the second terminal.

In order to achieve the second object, in the terminal network control device equipped with the first means, when the battery voltage at which the wireless communication means becomes inoperable decreases, the power supply abnormality notifying means detects and notifies the data communication means. Request. The data communication means informs the second terminal at a voltage level at which the wireless communication means is inoperable.

In order to achieve the second object, in the terminal network control device equipped with the second means, the separated power supply means supplies the electric power of the battery from the battery power supply means to the wireless communication means, and the data communication is performed. The means is supplied with power from the line from the line power supply means. Then, when the data communication unit receives the notification request from the power supply abnormality notification unit, the data communication unit notifies the second terminal by using the line power.

In order to achieve the third object, in the terminal network control device provided with the first means, the complementary power supply means supplies electric power from the line power supply means to the wireless communication means and the data communication means. The shortage of electric power is supplied from the battery power supply means.

In order to achieve the third object, in the terminal network control device provided with the second means, the telephone is provided within a range in which the line power storage means can achieve impedance matching with the line both during communication and during non-communication. It draws power from the line and stores it. The complementary power supply means supplies power from the stored power supply means and the battery power supply means to the data communication means and the wireless communication means.

In order to achieve the fourth object, in the terminal network control device of the present invention, the wireless communication means intermittently performs wireless communication. The line power storage means stores the power of the line when the wireless communication means is idle, and supplies the power stored by the line power supply means when the wireless communication means operates.

[0029]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIG.
It will be described based on. Reference numeral 1 denotes a terminal network control device of the present invention, which performs wireless communication with a first terminal 100 via a wireless transmission path 102 and a second terminal 101 with a data network via a telephone network 103. Data communication means 3
Then, the shared battery power source means 5 for supplying electric power to the wireless communication means 2 and the data communication means 3 using the battery 4 and the abnormality of the battery 4 are detected and the data communication means 3 is requested to report the abnormality. The power supply abnormality reporting means 6 is provided. FIG. 2 is a block diagram showing a more specific configuration example of the data communication means 3. Second terminal 10 via telephone network 103
1 and a network control unit 7 for connecting to V.1 of CCITT. 21 standard-compliant modem section 8 and wireless communication means 2
And a sequential circuit for controlling the network control unit 7, the modem unit 8 and the first interface unit 9 for realizing an interface with the second terminal and for controlling the connection and communication with the second terminal. The data communication control unit 10 is realized by a microcomputer or the like. The data communication control unit 10 also performs communication control for notifying the second terminal in response to the notification request from the power supply abnormality notifying means 6. When the telephone network 103 is a public telephone network that provides a no-ringing communication service, the network control unit 7 sends and receives various signals for responding to the no-ringing call connection from the second terminal and the telephone network 103. It is assumed to have an AC / DC impedance matching function and a dialing function for calling the second terminal 101 via the telephone network 103.

Further, the first interface means 9 is
A message received from the first terminal 100 via the wireless communication means 2 is transferred to the data communication control unit 10 or the modem unit 8 or a message from the modem unit 8 or the data communication control unit 10 is sent to the wireless communication control unit 12. To do.

FIG. 3 is a block diagram showing a concrete example of the wireless communication means 2. The wireless communication means 2 has an antenna,
For example, an interface between the wireless communication unit 11 that modulates a digital signal into an analog signal according to the low power wireless standard and transmits the analog signal through the antenna or demodulates the analog signal input through the antenna, and the data communication unit 3 is provided. Error detection and correction of wireless transmission between the second interface unit 13 to be realized and the first terminal 100 via the wireless transmission / reception unit 11 and a communication procedure in accordance with a low power wireless standard is realized by a sequential circuit, a microcomputer, or the like. And a wireless communication control unit 12 that operates. Now, the wireless transmission / reception unit 11 which realizes the wireless communication means 2 with the first terminal in the first embodiment is usually called an RF module and operates at a power supply voltage of about 3.5 to 5 V and consumes a current of about 40 mA. Suppose that current consumption is required. On the other hand, the modem unit 8 of the data communication means 3 uses the CCIIT
TV. It is usually realized by 21 modem LSIs. Such a modem LSI generally operates at a power supply voltage of about 4.5 V to 5 V and requires a current consumption of about 10 mA. These figures are almost at the current level of technology. Also,
The data communication unit 3 and the wireless communication unit 2 may operate at the same time, or only one of them may operate. Furthermore, the data communication control unit 10, the wireless communication control unit 12, and the power supply control unit 17 are all realized by a sequential circuit, a microcomputer, etc., but the power supply voltage and current consumption for these are, for example, at the time of operation from the current technical level. 2.
The power consumption is about 1 mA at 2 V and 10 microamperes (uA) or less at 2.2 V during STOP or clock operation, which is much smaller than the power consumption of the modem unit 8 and the wireless transmission / reception unit 11. The second interface unit 13 inputs / outputs a telegram exchanged between the data communication unit 3 and the wireless communication control unit 12.

FIG. 4 is a block diagram showing a specific example of the shared battery power source means 5 and the power source abnormality notifying means 6. The shared battery power supply means 5 is an example in which the battery 4 is realized by connecting three 3V lithium batteries in series, and a 5V power supply is supplied by the constant voltage regulator 14. The power control means 17
As another configuration method, a 3V lithium battery is used for DC / DC.
There is also a method of boosting with a converter and supplying a 5V power source.

The power supply abnormality notifying means 6 is a pseudo load so that the power supply control means 17, which is realized by a sequential circuit or a microcomputer, becomes equivalent to the load when the data communication means 3 and the wireless communication means 2 are operated simultaneously. 16 is applied to detect the output voltage of the constant voltage regulator 14 at that time.
It is assumed that the notification request is made to the data communication means 3 when the voltage is decreased to 4.5V which is 0.2V higher than the lower limit of the operating voltage of the modem unit 8 of 4.5V.

Although the data communication control unit 10, the wireless communication control unit 12, and the power supply control unit 17 have been shown to be realized by a sequential circuit, a microcomputer, etc., these three control units are integrated into one microcomputer. You may make it implement | achieve by.

Next, the operation of the first embodiment will be described. The operation when the terminal network control device 1 is not communicating with the first terminal 100 and the second terminal 101 will be described. The wireless communication means 2 stands by for receiving the notification request from the first terminal. Further, the power supply abnormality reporting means 6
Detects whether or not the output voltage of the constant voltage regulator 14 has dropped to a voltage value of 4.7V. When the power supply abnormality reporting means 6 detects a voltage drop, it issues a reporting request to the data communication means 3. The data communication unit 3 calls the second terminal 101 via the telephone network 103 and notifies the second terminal 101 that the battery voltage has dropped.

Even if the power supply control means 17 operates to reduce the power consumption by applying the pseudo load 16 every predetermined period and detecting the voltage drop by the voltage detection IC. Good.

Now, the first terminal 100 is connected to the wireless transmission line 10
2, the wireless communication means 2 is activated, and as a result, the data communication means 3 calls the second terminal 102 via the telephone network 103, and the first terminal via the data communication means 3 and the wireless communication means 2. When the communication between 100 and the second terminal 101 is performed, and when the second terminal 101 connects the data communication means 3 through the telephone network 103 by no ringing call, the data communication means 3 and the wireless communication means 2 are connected. The first terminal 10
There is a case where communication between 0 and the second terminal 101 is performed. Also in this case, the power supply abnormality reporting means 6 uses the constant voltage regulator 14
The detection of whether or not the output voltage of has decreased to the voltage value of 4.7 V is detected. When the power supply abnormality reporting means 6 detects a voltage drop, it issues a reporting request to the data communication means 3. The data communication means 3 notifies the second terminal 101 that the voltage of the battery has dropped when the communication is completed or when the communication is interrupted.

Next, the second embodiment will be described with reference to FIGS. 1, 2 and 3 used in the first embodiment.

For example, in the shared type battery power source means 5 in the first embodiment, the modem section 8 of the data communication means 3 is 4.5.
A power supply voltage of V or higher is required. In the data communication means 3 in the second embodiment, the modem LSI of the modem section 8 operates at a power supply voltage of about 3V to 5V and a current consumption of about 10mA. The wireless communication unit 2 is realized by the same RF module as the wireless transmission / reception unit 11 in the first embodiment and operates at a power supply voltage of about 3.5 to 5 V and a current consumption of about 40 mA. Therefore, the operation guaranteed power supply voltage of the data communication unit 3 is lower than that of the wireless communication unit 2.

By doing so, communication can be performed until the battery consumes the lowest voltage at which the RF module can operate, and the battery voltage drop notification by the data communication means 3 can be surely performed.

The third embodiment will be described with reference to FIG. The terminal network control device 1 according to the third embodiment includes a wireless communication unit 2, a data communication unit 3, a power supply abnormality notification unit 6, a line power supply unit 18, and a battery power supply unit 19. Among them, the wireless communication means 2, the data communication means 3, and the power supply abnormality notification means 6 are the same as the means shown in the first embodiment. The terminal network control device 1 is the telephone network 1.
03 is connected via a telephone line (two lines L1 and L2). The line power supply means 18 is means for obtaining power from this telephone line. The voltage between the telephone lines L1 and L2 is about 48V when opened. The terminal network control device 1 connected to this telephone line must ensure an impedance of 1 MΩ or more with respect to the telephone line when not communicating. Also, it is necessary to secure a DC impedance of 4 KΩ or more for the telephone line during no ringing communication. Further, during the outgoing call communication in which the terminal network control device 1 calls the second terminal 101 by dialing and communicates, the DC impedance is 50Ω or more and 300Ω or less as measured by the current of 20 mA or more and 120 mA or less with respect to the telephone line. It is prescribed to be. Therefore, when not communicating from the telephone line, the voltage between the telephone lines L1 and L2 is about 48V and the current drawn is 4
It will be 8uA or less. During no ringing communication,
The voltage between the telephone lines L1 and L2 is slightly lower than that during non-communication (45V here), and the DC loop current is about 10
It becomes mA or less. At the time of calling communication, the voltage between the telephone lines L1 and L2 is about 10 V, and the DC loop current is several tens mA (here, 60 mA). Therefore, the maximum amount of power supplied via the telephone line is 480uW during non-communication and 450 during no-ringing communication.
mW, a maximum of 600 mW can be supplied during call communication. The means for supplying the electric power drawn from the telephone line as the power source for the data communication means 3 (modem section 8, data communication control section 10, etc.) is the line power supply means 18. It has been described in the first embodiment that the modem LSI that realizes the modem unit 8 of the data communication unit 3 generally operates at a power supply voltage of about 4.5 V to 5 V and consumes a current of about 10 mA. In addition, the data communication control unit 10 determines that the current is about 1 mA at 2.2 V and 10 uA or less at 2.2 V during STOP.
The above-mentioned example has been described. Therefore, it can be seen that the data communication means 3 can operate by supplying a power considerably smaller than the power that can be supplied via the telephone line (about 22 uW during non-communication and 52.2 mW during no-ringing communication or calling communication).

Specific means for realizing the battery power source means 19 will be described with reference to FIG. This is almost the same as the first embodiment. An example in which the battery 4 is realized by connecting two 3V lithium batteries in series and a 5V power source is supplied only to the wireless communication means 2 by the constant voltage regulator 14 is shown. The power supply abnormality reporting means 6 applies a pseudo load 16 so that the power supply control means 17 realized by a sequential circuit, a microcomputer or the like becomes equivalent to the load when the wireless communication means 2 is operated, and a constant voltage regulator at that time. Detection of output voltage of 14 by voltage detection IC
It is assumed that the data communication means 3 is requested to report when the voltage is reduced to 15 and the voltage drops to a voltage value of 3.7 V, which is 0.2 V higher than the lower limit of 3.5 V of the operating voltage of the wireless transceiver 11.

Next, the operation of the third embodiment will be described. The operation when the terminal network control device 1 is not communicating with the first terminal 100 and the second terminal 101 will be described. The wireless communication means 2 stands by for receiving the notification request from the first terminal. Further, the power supply abnormality reporting means 6
Detects whether or not the output voltage of the constant voltage regulator 14 has dropped to a voltage value of 3.7V. When the power supply abnormality reporting means 6 detects a voltage drop, it issues a reporting request to the data communication means 3. The data communication unit 3 calls the second terminal 101 via the telephone network 103 and notifies the second terminal 101 that the battery voltage has dropped.

Even if the power supply control means 17 operates so as to reduce the power consumption by applying the pseudo load 16 every predetermined period and detecting the voltage drop by the voltage detection IC. Good.

Now, the first terminal 100 is connected to the wireless transmission line 10
2, the wireless communication means 2 is activated, and as a result, the data communication means 3 calls the second terminal 102 via the telephone network 103, and the first terminal via the data communication means 3 and the wireless communication means 2. When the communication between 100 and the second terminal 101 is performed, and when the second terminal 101 connects the data communication means 3 through the telephone network 103 by no ringing call, the data communication means 3 and the wireless communication means 2 are connected. The first terminal 10
There is a case where communication between 0 and the second terminal 101 is performed. Also in this case, the power supply abnormality reporting means 6 uses the constant voltage regulator 14
The detection of whether or not the output voltage of 1 has decreased to the voltage value of 3.7 V is detected. When the power supply abnormality reporting means 6 detects a voltage drop, it issues a reporting request to the data communication means 3. The data communication means 3 notifies the second terminal 101 that the voltage of the battery has dropped when the communication is completed or when the communication is interrupted. Although the same as in the first and second embodiments, the data communication means 3 always receives the electric power supplied from the telephone network 103 through the telephone line from the line power supply means 18 and always operates. Therefore, the data communication unit 3 performs a notification operation in response to the notification request from the power supply abnormality notification unit 6, but the network control unit 7 calls the second terminal 101 but cannot connect or the connection cannot be established. However, a failure occurs during communication and the connection is interrupted. In response to such a situation, the data communication means 3 is usually equipped with a function of retrying the notification. Even in this case,
Since it is supplied with power from the line power supply means 18 to operate, it is possible to reliably report that the voltage has dropped.

Next, a fourth embodiment will be described with reference to FIG. 1 is a terminal network control device of the present invention, which is a wireless communication means 2, a data communication means 3, and a line power supply means 18.
A battery power source means 19 and a complementary power source means 21 for supplying the shortage of power supplied by the line power source power source 18 to the wireless communication means 2 and the data communication means 3 from the battery power source means 19. It is a thing. A specific example of the complementary power supply means 21 is shown in FIG. Other components are the same as those described in the third embodiment and the like. The complementary power supply means 21 wirelessly communicates with the data communication means 3 via a diode for preventing current backflow so that one of the power supply outputs of the battery power supply means 19 and the line power supply means 18 does not charge to the lower side even if the voltage is high. The means 2 is used as a power source. The battery power source means 19 outputs 5V, and the line power source means 18 outputs 5.5V. An example of the line power supply means 18 is shown in FIG. 8 (b). The line power supply unit 18 is a unit or a current for switching a plurality of constant current circuits so as not to exceed the pull-in current (DC loop current) specified during non-communication, no-ringing communication, and calling communication via the telephone line. It is assumed that a means for switching the resistance value for limiting is installed.

The operation of the fourth embodiment will be described. When the load of the data communication unit 3 and the wireless communication unit 2 is light, the line power supply unit 18 regulates a pull-in current (DC loop current) specified during non-communication, no ringing communication, and call communication via the telephone line. If the voltage does not exceed the limit, the power supply voltage of 5.5V is output. Further, the battery power source means 19 outputs 5V. Therefore, the data communication means 3 and the wireless communication means 2 are supplied with a power supply voltage of 5V, which is a voltage drop of about 0.5 minutes from the forward voltage of 5.5V output from the line power supply means 18. The battery power supply means 19 for outputting 5 V drops the forward voltage by about 0.5 V, so that the line power supply means 18 tries to supply 4.5 V to the data communication means 3 and the wireless communication means 2.
Is higher than the voltage supplied by. Therefore, the power supply required for the data communication unit 3 and the wireless communication unit 2 is supplied from the line power supply unit 18.

Now, the data communication means 3 and the wireless communication means 2
When the load becomes heavy and approaches the pull-in current (DC loop current) specified during non-communication, no-ringing communication, and calling communication via the telephone line, the line power supply means 18 supplies the power supply voltage of 5.5V. Can not be output and goes down.
If the power supply voltage output from the line power supply means 18 becomes 5V, the power supply voltage supplied from the battery power supply means 19 to the data communication means 3 and the wireless communication means 2 becomes equal to the line power supply means 18 and the battery power supply. Operates to supply from both means 19. Further, line power supply means 18
When the power supply voltage output by the device becomes 4.5 V, the power supply voltage supplied to the data communication means 3 and the wireless communication means 2 from the battery power supply means 19 becomes higher, so that the power supply power is supplied from the battery power supply means 19. Works like.

When the total power consumption required for the data communication means 3 and the wireless communication means 2 to operate is larger than the power consumption that can be supplied by the line power supply means 18, the data communication means 3 and the wireless communication means 2 simultaneously. Such operation is performed when there are cases where one or the other operates.

Next, a fifth embodiment will be described with reference to FIG. In the line power supply means 18 of FIG. 7 for explaining the fourth embodiment, a line for drawing power from the telephone line and storing it in the range where the data communication means 3 can make impedance matching with the line both during communication and during non-communication. The power storage means 22 and the stored power supply means 23 using the stored power as a power source are provided. Examples of the line power storage means 19 include capacitors and rechargeable batteries. Further, examples of the accumulated power supply means 23 include a constant voltage regulator and a DC / DC converter.

Therefore, by providing the complementary power supply means 21 described in the fourth embodiment with the line power storage means 22 and the stored power supply means 23, a battery that realizes the battery power supply means 19 as compared with the fourth embodiment. The capacity can be reduced.

Next, a sixth embodiment will be described with reference to FIG. Reference numeral 1 denotes a terminal network control device, which serves as a wireless communication means 2 for intermittently performing wireless communication, a data communication means 3, and a line power supply means 18, which is an impedance with the line when the data communication means 3 is communicating and not communicating. Line power storage means 19 for storing power by subtracting power from the telephone line within a range where matching can be achieved
And a stored power supply means 20 for supplying the stored power to the wireless communication means 2 and the data communication means 3. The wireless communication means 2 needs to perform the normal reception standby operation as described in the first embodiment. In this embodiment, as the method for waiting for reception, a means for waiting for reception for a short time every predetermined time is adopted. Then, in order to explain the embodiment in an easy-to-understand manner, it is assumed that the reception waits only for 25 ms every 30 seconds. Further, it is assumed that power is supplied to the wireless transmission / reception unit 11 only during standby for reception. Therefore, it is 2.2V during the time when it is not waiting for reception.
The power consumption is less than 10 uA. The power consumption during reception standby is 40 mA at 3.5V.

Now, as described in the third embodiment,
When there is no communication from the telephone line, the voltage between the telephone lines L1 and L2 is about 48 V, and the current drawn is 48 uA or less. During no-ringing communication, the voltage between the telephone lines L1 and L2 is slightly lower than that during non-communication (45 V here), and the DC loop current is about 10 mA or less. At the time of calling communication, the voltage between the telephone lines L1 and L2 is about 10 V, and the DC loop current is several tens mA (here, 60 mA).

Next, assuming that a current that can be drawn from the telephone line during non-communication is stored in the line power storage means 19, energy W1 stored when a capacitor is used as the line power storage means 19 is obtained.

First, the charge Q accumulated in a capacitor with no charge accumulated at a constant voltage of 48 uA for 29.75 seconds is Q = t.multidot.i = 29.75 × 48 × 10 ^-6 coulombs. The voltage V is such that the capacitance C of the capacitor is 220 uF. V = Q / C = 29.75 × 48 × 10 ⁻⁶ / (220 × 1
0 ^-6 ) = 6.49 V The amount W1 of energy stored is W1 = (C · V ² ) / 2 = (220 × 10 ^-6 × 6.49)
× 6.49) / 2 = 4633 × 10 ⁻⁶ J.

The energy W2 required to operate a load having a power consumption voltage (V2) of 3.5 V and a consumption current (I2) of 40 mA for 25 ms (t time) is W2 = V2 × I2 × t = 3.5 × 40. × 10 ^-3 × 25 /
It becomes 1000 = 3500 × 10 ⁻⁶ J.

In this way, the line power supply means 20 is set to W1.
Is converted into W2, and the energy necessary for driving the wireless communication unit 2 is efficiently converted into the line power storage unit 19.
You can see that it can be accumulated in.

[0058]

As described above, according to the terminal network control apparatus of the present invention, the following effects can be obtained.

(1) There is no need to attach two devices, the old terminal network control device and the wireless adapter, and the work for connecting the two devices with a metal cable is not required. Since the old terminal network control device and the wireless adapter are integrated, a shared battery is mounted, which is inexpensive. In addition, it is not necessary to separately grasp the battery voltage drop of the old terminal network control device and the wireless adapter, and it is not necessary to install a communication protocol for that purpose or to equip the second terminal with a display function for grasping the management. Will be easier.

(2) The power supply voltage required for communicating with the second terminal such as the center is lower than the power supply voltage required for wireless communication with the first terminal such as the meter of the terminal network control device. Therefore, it is possible to construct a system capable of notifying the second terminal of battery voltage drop.

(3) Since the battery is used for wireless communication with the first terminal such as a meter, and the communication with the second terminal such as the center operates only with electric power supplied from the telephone line, the present invention Is a battery for wireless communication as a multi-purpose terminal network control device capable of connecting not only wireless communication means with a first terminal such as a meter but also other sensors such as contact devices. It can be used without changing the life.

(4) It is possible to provide an inexpensive terminal network control device in which the battery capacity, which is a power supply for wireless communication, is reduced.

(5) The life of the battery can be extended by mounting the line power storage means.

(6) Since it is possible to provide a terminal network control device that connects by radio communication with the first terminal that operates using only the electric power supplied from the telephone line, the frequency of radio communication can be limited. Absent. In addition, there is no need for replacement work due to battery life. Further, it is possible to eliminate the management work of the battery voltage drop.

[Brief description of drawings]

FIG. 1 is a block diagram of a terminal network control device according to first and second embodiments of the present invention.

FIG. 2 is a block diagram illustrating data communication means of the device.

FIG. 3 is a block diagram illustrating wireless communication means of the device.

FIG. 4 is a block diagram illustrating a shared-type battery power supply unit of the device.

FIG. 5 is a block diagram of a terminal network controller according to a third embodiment of the present invention.

FIG. 6 is a block diagram illustrating a battery power supply unit of the device.

FIG. 7 is a block diagram for explaining complementary power supply means of a terminal network control device according to a fourth embodiment of the present invention.

FIG. 8 (a) is a block diagram for explaining a concrete example of the means. (B) is a circuit diagram for explaining a concrete case of the line power supply means of the device.

FIG. 9 is a circuit diagram illustrating complementary power supply means of a terminal network control device according to a fifth embodiment of the present invention.

FIG. 10 is a block diagram of a terminal network controller according to a sixth embodiment of the present invention.

[Explanation of reference numerals] 1 terminal network control device 2 wireless communication means 3 data communication means 4 battery 5 common type battery power supply means 6 power supply abnormality reporting means 7 network control section 8 modem section 9 first interface means 10 data communication control section 11 Wireless transmitter / receiver 12 Wireless communication controller 13 Second interface means 14 Constant voltage regulator 15 Voltage detection IC 16 Pseudo load 17 Power supply controller 18 Line power supply means 19 Battery power supply means 20 Separate power supply means 21 Complementary power supply means 22 Line power storage means 23 Stored power supply means

Claims (6)

[Claims] 1. A wireless communication means for performing wireless communication with a first terminal, and a data communication means for performing data communication with a second terminal.
A shared battery power supply means for supplying electric power to the wireless communication means and the data communication means by using a battery, and a power supply abnormality notification requesting to detect an abnormality of the battery and report the abnormality to the data communication means. And a terminal network control device having means. 2. The terminal network control device according to claim 1, wherein the wireless communication means is a data communication means operating at a voltage lower than a minimum operable voltage value. 3. A wireless communication means, a data communication means, a battery power supply means for supplying battery power as a power source, a line power supply means for supplying power supplied from an exchange through a telephone line, and The wireless communication means is equipped with the battery power supply means as the power supply, the data communication means as the power supply with the line power supply means, and the power supply abnormality reporting means for reporting when the power supply is abnormal. Terminal network control device. 4. A wireless communication means, a data communication means, a line power supply means, a battery power supply means, and a shortage of electric power supplied by the line power supply means to the wireless communication means and the data communication means. A terminal network control device comprising: a complementary power supply means supplied from the means. 5. A line power accumulating unit that draws power from a telephone line and stores the power as a line power source unit within a range in which the data communication unit can perform impedance matching with the line both during communication and during non-communication, and the stored power. The terminal network control device according to claim 4, further comprising a stored power supply unit that uses the power as a power source. 6. A wireless communication means for performing wireless communication intermittently,
The data communication means and the line power supply means, which is the line power storage means, draws power from the telephone line and stores the power within a range in which the data communication means can perform impedance matching with the line both during communication and during non-communication. A terminal network control device comprising: stored power supply means for supplying power to the wireless communication means and the data communication means.