JP2006203295A - Radio equipment and radio master unit used for the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide radio equipment capable of extending the lifetime of a battery used for a backup power supply with respect to an AC power supply and to provide a radio master unit used for the radio equipment. <P>SOLUTION: The radio equipment includes: the radio master unit 60 for carrying out information communication through a terminal network control unit connected to a host device 1 via a telephone line 13; and radio slave units 15, 16, 17 wirelessly connected to the radio master unit 60. The radio master unit 60 includes an AC adaptor unit 38 for supplying power of the AC power supply; and a DC power supply unit 35 for supplying the power of the battery. On the occurrence of a power failure when no power is supplied from the AC adaptor unit 38, the radio master unit 60 carries out backup operations by using the power supplied from the DC power supply unit 35 and stops the backup operations after a prescribed time elapses. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention generally relates to a wireless device and a wireless master device used therefor, and more particularly, to an automatic meter-reading wireless device and a wireless master device used therefor, and more specifically to a host device and a terminal network control device. In a data communication system that performs data transmission by means of no-ringing communication, a wireless device that transmits data from meters such as LP gas, city gas, water, and electricity to a terminal network control device and a wireless master device used therefor It is about.

  FIG. 7 is a block diagram showing an example of the entire configuration of a data communication system based on conventional no-ringing communication.

  As shown in FIG. 7, in the center side device, the host device 1 and the center side network control device 2 are connected. Moreover, in the terminal side apparatus installed in the consumer, the LP network 7, the city gas meter 8, the water meter 9, the power meter 10, the security device 11 and the home telephone 12 are connected to the terminal network control device 6.

  The center side device and the terminal side device are connected via the telephone line 13 (including information networks such as mobile phones and PHS) as an information network by the center side switching center 3 and the terminal side switching center 4 provided with a no-ringing trunk 5. Connected. In such a configuration, data transmission by no-ringing communication is performed between the center side device and the terminal side device, and for example, an automatic meter reading of the LP gas meter 7 from the host device 1 or an abnormality from the security device 11 due to a terminal call. Notification (for example, gas leak) is performed.

  During no-ring communication, the terminal network control device 6 performs communication without disconnecting the home telephone 12 from the telephone line 13 by detecting the off-hook of the home telephone 12 by the no-ringing trunk 5. On the other hand, in the case of a terminal call, the home phone 12 is normally disconnected from the telephone line to prevent the bell resonance of the home phone 12.

  The terminal-side device is installed in a consumer, for example, a general household, and it is necessary to install the terminal-side device for each home. In this case, for example, when the installation place is a condominium or an apartment house, it is necessary to make a hole in the wall in order to perform wiring between the terminal network control device and the meter.

  Therefore, if data is transmitted and received by radio waves instead of connecting the terminal network control device 6 and the meter by wire, wiring work between the terminal network control device 6 and the meter becomes unnecessary.

  FIG. 8 is a block diagram showing an example of the overall configuration of a conventional data communication system using a wireless device between the terminal network control device 6 and the meter.

  As shown in FIG. 8, the wireless device includes a wireless master device 14 connected to the terminal network control device 6 by wire and a wireless slave device 15 connected to a terminal device such as a meter. Although a single wireless slave device 15 is provided for one wireless master device 14, a configuration in which a plurality of wireless slave devices 16 and 17 are provided may be employed.

  An LP gas meter 7, a city gas meter 8, a water meter 9, a power meter 10, a security device 11, and the like are connected to the wireless slave device 15 by wire. In addition, a home phone 12 is connected to the terminal network control device 6 by wire. Other configurations are the same as those shown in FIG.

  The wireless master device 14 and the wireless slave device 15 can perform wireless communication between the two by performing an association for registering each other's identification number in the initial setting operation after shipment from the factory.

  By the way, a battery is used as a power source of the control device in the wireless master device 14 and the wireless slave device 15. Therefore, there is a problem that the control device in the wireless master device 14 and the wireless slave device 15 starts to operate after factory shipment, consumes the battery, and shortens the battery life. In addition, since a wireless device is built in, it is necessary to have a structure that cannot be modified under the Radio Law.

  And since the radio | wireless main | base station 14 and the radio | wireless subunit | mobile_unit 15 are in the point which each left | separated, there exists a problem that operation confirmation is difficult and visual confirmation of the setting content cannot be performed easily on the spot. Since the power source is a battery, in order to operate for a long period of time, it is necessary to perform an intermittent transmission / reception operation, and it is necessary to extend the battery life and extend the life without flowing unnecessary current.

In order to solve these problems, Japanese Patent Laying-Open No. 2003-141671 (Patent Document 1) discloses a wireless master device including a power switch that performs an on / off operation according to the orientation of the main body and an LED display unit, and a wireless communication device. A child machine is disclosed. In the wireless master device and the wireless slave device, the power switch is turned off at the time of shipment from the factory, and the power switch is turned on when the wireless device is installed. Therefore, it is possible to prevent battery consumption. Further, the operation can be confirmed by the LED emitting light when the power is turned on, the frame is assembled, or the communication status is confirmed.
JP 2003-141671 A

  However, in order to ensure a long-term power supply, it is necessary to replace the batteries used in the wireless master device and the wireless slave device.

  Therefore, in order to use an AC power source as a long-term power source for the radio base unit, the radio base unit is configured so that power can be supplied through an AC adapter, and a battery is used as a backup power source in the event of a power failure of the AC power source. Can be considered.

  In this case, there is a problem that the battery is consumed by performing a backup operation with the battery for a long time at the time of a power failure, and the life of the battery is shortened.

  Moreover, even if it is not a power failure, accidentally leaving the AC adapter unplugged from the AC outlet and forgetting to insert the AC adapter into the AC outlet will shorten the battery life. .

  Furthermore, in the production line, a battery is inserted into the wireless master unit and tested as a power source. After the factory shipment, the battery as a backup power source is not consumed so that the backup operation with the battery is not performed for a long time before installation. It is necessary to remove the battery.

  In the case of a power failure or when the AC adapter is unplugged from the AC outlet, in order to operate the wireless device for a long time using a battery as a power source, it is necessary to perform an intermittent transmission / reception operation. In order to make the battery life as long as possible, it is necessary to prevent a wasteful current from flowing through the wireless device in the above case.

  Accordingly, an object of the present invention is to provide a wireless device capable of extending the life of a battery used as a backup power supply for an AC power supply and a wireless master device used therefor.

  A wireless device according to the present invention includes a wireless master device that performs information communication through a terminal network control device connected to a host device via an information network, and a wireless slave device that is wirelessly connected to the wireless master device. The wireless master device includes AC power supply means for supplying power from an AC power supply and DC power supply means for supplying power from a battery. In the event of a power failure in which no power is supplied from the AC power supply means, the wireless master unit performs a backup operation with the power supplied from the DC power supply means, and stops the backup operation after a predetermined time has elapsed.

  In the wireless device of the present invention, not only at the time of a power failure of a normal AC power supply but also when power is not supplied from the AC power supply means when the AC power supply means is not connected to the AC power supply. Since the backup operation is stopped when a predetermined time elapses after the backup operation is performed with the power supplied from the battery, battery consumption can be reduced, and the battery used as a backup power source for the AC power supply can be reduced. Life can be extended.

  In the wireless device according to the present invention, the wireless master device preferably includes a terminal network control device. In this case, the number of devices constituting the terminal device of the information communication system using the wireless device can be reduced.

  Further, in the wireless device according to the present invention, the wireless master transmits power outage information that informs the wireless slave in the event of a power outage, and when the power is restored from the power outage, It is preferable to transmit power failure recovery information informing that the system has recovered.

  In this case, it is preferable that the wireless slave device stores the communication information when receiving the power failure information from the wireless master device, and transmits the communication information to the wireless master device when receiving the power failure recovery information from the wireless master device.

  By doing so, since the wireless slave unit does not perform useless communication operation to the wireless master unit at the time of a power failure, it is possible to reduce the consumption of the battery used as the power source of the wireless slave unit, Battery life can be extended.

  Furthermore, in the wireless device according to the present invention, it is preferable that the wireless master device transmits power failure information notifying the host device of a power failure at the time of a power failure.

  By doing so, communication information of the wireless master device can be backed up by the host device.

  In the wireless device according to the present invention, the wireless master unit has a reset means for resetting the operation, and the power supply from the DC power supply means at the time of power failure is achieved by turning on the reset means. Is preferably stopped.

  By doing this, during the backup operation with the power supplied from the battery at the time of power failure, or by inserting the battery into the wireless master unit and performing a test as a power source, the operation confirmation was completed Thereafter, the power supply from the DC power supply means can be forcibly stopped by turning on the reset means.

  In this case, the wireless master device has display means for displaying the reset state, and the display means shifts from the display state to the non-display state as time elapses when the reset means is turned on. preferable.

  By doing this, during the backup operation with the power supplied from the battery at the time of power failure, or by inserting the battery into the wireless master unit and performing a test as a power source, the operation confirmation was completed By subsequently turning the reset unit on for a long time, it is possible to confirm in the state of the display unit whether the supply of power from the DC power supply unit is stopped and the operation of the wireless master unit is stopped.

  A wireless master device according to the present invention is a wireless master device used in a wireless device for performing information communication through a terminal network control device connected to a host device via an information network, and is supplied with power from an AC power source AC power supply means for performing power supply, DC power supply means for supplying power from the battery, power failure detection means connected to the AC power supply means for detecting a power failure state in which power is not supplied from the AC power supply means, and this power failure detection means The backup operation is performed by the power supply switching means that switches to the power supply from the DC power supply means in response to the detection of the power and the power supplied from the DC power supply means, and the backup operation is stopped after a predetermined time has elapsed. Control means for controlling.

  In the wireless master device of the present invention, a power failure state (including a case where power is not supplied from the AC power supply means when the AC power supply means is not connected to the AC power supply as well as during a normal AC power failure) Is detected by the power failure detection means, the backup operation is stopped after a predetermined time after performing the backup operation with the power supplied from the battery. The life of a battery used as a backup power source for the power source can be extended.

  As described above, according to the present invention, it is possible to extend the life of a battery used as a backup power source for an AC power source in a wireless master device.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 is a block diagram showing an example of the overall configuration of a data communication system using a wireless device of the present invention between a terminal network control device and a meter.

  As shown in FIG. 1, instead of the wireless master device 14 connected to the terminal network control device 6 as shown in FIG. 8, the wireless master device 60 with the terminal network control device provided with the terminal network control device is used as the wireless master device. Is used. Other configurations are the same as those shown in FIG.

  FIG. 2 is a block diagram showing an example of the overall configuration of the wireless master device 60 with a terminal network control device in FIG.

  As shown in FIG. 2, the wireless master device 60 with a terminal network control device includes a transmission / reception control unit 61 and a power supply control unit 62.

  In the transmission / reception control unit 61, the radio control circuit unit 20 performs radio wave transmission, reception, error control, and the like. The wireless module unit 19 performs amplification, modulation, demodulation, carrier sense, and the like of radio waves, controls transmission / reception of radio waves in accordance with the Radio Law, and transmits / receives to / from the wireless slave units 15 to 17 via the antenna 18. These operations are controlled by the microcomputer unit 21 as a control means. The display circuit unit 40 lights up the LED 39 as a display unit in order to display the operation state or reset state of the wireless master device 60 with the terminal network control device. Power is supplied to each unit of the transmission / reception control unit 61 from the AC adapter unit 38 connected to the AC power supply through the power supply circuit unit 36 as AC power supply means for supplying power from the AC power supply.

  According to a signal from a power failure detection circuit 37 serving as a power failure detection means for detecting a power failure state in which power is not supplied from the AC adapter unit 38 when the AC power source has a power failure or the AC adapter unit 38 has been disconnected from the AC outlet. The power switch 34 serving as the power switching unit of the DC power supply unit 35 serving as the DC power supply unit with the battery attached is turned on, and is connected to each part of the transmission / reception control unit 61 via the DC / DC power circuit unit 33. Power is supplied.

  Since the basic data content as communication information of the wireless master device 60 with the terminal network control device is stored in the nonvolatile memory (EEPROM) of the storage unit 41, the content of the communication data is retained even if the operation is terminated due to a power failure Has been.

  The telephone line 13 on the terminal side exchange 4 side is connected to a line modular jack 22. The home phone 12 is connected to a home modular jack 26. A lightning protection circuit portion 23 is connected to the line modular jack 22 in order to improve lightning resistance. In order to detect the off-hook operation of the home phone 12 and itself, the off-hook detection unit 24 is connected to the home modular jack 26 via the home phone busy detection unit 27, and the line is connected via the lightning protection circuit unit 23. Is connected to the modular jack 22.

  By configuring in this way, communication does not collide with the in-home telephone 12, or it is possible to confirm the own off-hook operation.

  The polar detection unit 25 detects a slow reverse of the telephone line 13 and operates together with the NRS detection circuit unit 30 to determine whether or not it has been selected. Moreover, the polar detection unit 25 also detects a ringer signal of the telephone line 13. A part of the detected signal is also supplied to the pre-ringer signal detection circuit unit 28 and can be used for an L-mode communication home telephone.

  The loop circuit unit 29 is a circuit for going off-hook when a terminal is called, and is also a circuit for a dial pulse. The half-loop circuit unit 31 is a circuit part for maintaining impedance during no-ringing communication.

  The modem circuit unit 32 is a modem circuit unit that generates a touch-tone dial signal using a DTMF signal and performs FM communication during terminal communication or no-ringing communication.

  The security interface unit 42 is an interface unit between the wireless master device 60 with a terminal network control device and an external device. Here, an external device in JIS 7 bit format is connected.

  FIG. 3 is a block diagram showing a schematic configuration mainly of the power supply control unit 62 in FIG. 2 partially using circuit components.

  As shown in FIGS. 2 and 3, the power necessary for the transmission / reception control unit 61 is supplied from an AC adapter unit 38 serving as an AC power supply unit or a DC power supply unit 35 serving as a DC power supply unit.

  Normally, the AC adapter unit 38 is inserted into the power jack J501, and an AC voltage is applied to the power circuit unit 36 and the power failure detection circuit unit 37. IC 502 is a three-terminal regulator IC. The output of the IC 502 becomes the power source Vccm of the microcomputer unit 21 via the diode D504.

  At the time of a power failure, the power Vccm of the microcomputer unit 21 is supplied from the DC power supply unit 35 via the power switch unit 34 and the DC / DC power circuit unit 33.

  A voltage from the AC adapter unit 38 is normally applied to the power failure detection circuit 37 as a power failure detection means from the cathode side of the diode D502. For this reason, a voltage determined by the forward voltage of the resistors R550 and R505 and the diode D505 is applied to the Vdd terminal of the IC 503 as the voltage detection IC. As a result, a voltage higher than the detection voltage of the IC is applied to the IC 503. Accordingly, since the output of the IC 503 is an open drain output type, the output of the OUT terminal does not become low level, and the resistor built-in digital transistor DT502 remains in an open state.

  When a power failure of the AC power source or a state where the AC adapter unit 38 is disconnected from the AC outlet occurs, a low voltage is applied to the Vdd terminal of the IC 503 as the voltage detection IC, and at the same time, the output of the OUT terminal becomes low level. Thus, since the low level is input to the input port X of the microcomputer unit 21, the microcomputer unit 21 detects the power failure state.

  In the power failure detection circuit 37, the low level output of the IC 503 turns on the resistor built-in digital transistor DT502. As a result, the transistor Q503 of the power switch 34 as the power supply switching unit is turned on, and the transistor Q502 is turned on. When the transistor Q502 of the power switch 34 is turned on, the DC power supply unit 35 applies a voltage to the emitter of the resistor built-in digital transistor DT502 in the power failure detection circuit 37 via the DC / DC power supply circuit unit 33. At the same time, a voltage is applied to the power source Vccm of the microcomputer unit 21. In this way, the power switch 34 as the power switching means switches to power supply from the DC power supply unit 35 in response to detection by the power failure detection circuit 37.

  With only the above operation, when a power failure of the AC power supply or a state in which the AC adapter unit 38 is disconnected from the AC outlet occurs, power supply from the battery continues through the DC power supply unit 35 without limitation. For this reason, the battery life may be shortened.

  4 and 5 are flowcharts showing operations at the time of power failure and at the time of power failure recovery in the data communication system using the wireless device of the present invention between the terminal network control device and the meter.

  As shown in FIG. 4, when it is detected in step S <b> 1 that a power failure has occurred, in step S <b> 2, the wireless master device with terminal network control device 60 is in a power failure with respect to the wireless slave devices 15-17. Send out power outage information to let you know. Specifically, information indicating that a power failure has occurred and that wireless transmission is to be stopped when a predetermined time has elapsed is transmitted. As a result, even if the wireless slave units 15 to 17 are operating normally with batteries, the wireless slave units 15 to 17 can be prevented from being wasted when the wireless master unit 60 is not operating. Battery consumption due to useless communication operations can be reduced.

  Next, in step S <b> 3, the wireless master device 60 transmits power failure information notifying the host device (host computer) 1 of a power failure through the telephone line 13.

  In step S4, when the power failure time has passed a predetermined time, in step S5, the wireless master device 60 transmits the communication information (data) to be transmitted from the wireless master device 60 through the telephone line 13 to the host device. 1 to send. In this case, the wireless master device 60 transmits only information that cannot be stored in the nonvolatile memory (EEPROM) of the storage unit 41 to the host device 1 and stores other information in the storage unit 41. Accordingly, the wireless master device 60 performs a backup operation by transmitting only the minimum information to the host device 1.

  The wireless master device 60 can perform a backup operation by transmitting all information to the host device 1. However, transmitting all information to the host device 1 increases the communication time and concentrates the lines. Therefore, it is preferable to transmit only the minimum information to the host device 1 as described above.

  In step S6, the wireless master device 60 stops the backup operation by the battery. Specifically, the supply of power from the DC power supply unit 35 is stopped by outputting a low level of the drive signal from the microcomputer unit 21 to the power supply off unit 44 and turning off the power switch 34. .

  In this way, at the time of a power failure (including not only when a normal AC power supply is interrupted, but also when the AC adapter unit 38 is not connected to the AC power source or the like, the power is not supplied from the AC adapter unit 38). After a backup operation is performed with the power supplied from the battery, the backup operation is stopped when a predetermined time elapses, so that battery consumption can be reduced and the life of the battery used as a backup power supply for the AC power supply can be reduced. Can be extended.

  On the other hand, in step S7, when receiving the power failure information from the wireless master device 60, the wireless slave devices 15 to 17 store a plurality of data as communication information to be transmitted to the wireless master device 60 in the storage unit, and It is not transmitted to the machine 60.

  Thereafter, when the power supply is restored from the power failure state in step S8, the power switch 34 as the power supply switching means switches to the power supply from the AC adapter unit 38 in response to the detection of the power failure recovery by the power failure detection circuit 37.

  In step S9, the wireless master device 60 transmits the power failure recovery information to the host device 1 and resumes the backup operation.

  As shown in FIG. 5, in step S <b> 10, the wireless master device 60 confirms backup data of the host device 1.

  In step S11, the wireless master device 60 transmits power failure recovery information to the wireless slave devices 15-17.

  In step S12, when the wireless slave units 15 to 17 receive the power failure recovery information from the wireless master device 60, if there is communication information (data) stored in the wireless slave devices 15 to 17 at the time of the power failure, the wireless master device 60 The communication information is transmitted to.

  In step S <b> 13, the wireless master device 60 transmits the communication information received from the wireless slave devices 15 to 17 to the host device 1.

  By doing in this way, since the wireless slave units 15 to 17 do not perform useless communication operation with the wireless master unit 60 at the time of a power failure, the consumption of the battery used as the power source of the wireless slave units 15 to 17 is reduced. The battery life can be extended.

  The predetermined time at the time of the power outage is preferably managed by the microcomputer unit 21 as a parameter so that it can be changed from the host device 1 of the center according to the power situation in Japan. Since there are more propane gas consumers in rural areas than in urban areas, there are some differences in the response of the electric power company to the above-mentioned consumers at a predetermined time at the time of power failure and at the time of power recovery.

  By the way, as shown in FIGS. 2 and 3, in the reset circuit unit 43 as the reset means, the IC 703 which is a voltage detection IC is connected to the power supply voltage Vccm of the microcomputer unit 21. When the power is turned on, a low level voltage is input to the input port Y of the microcomputer unit 21 from the OUT terminal of the IC 703. Further, when a reset switch SW702 as a specific reset means is turned on, a low level voltage is input from the OUT terminal of the IC 703 to the input port Y of the microcomputer unit 21. In this way, the reset operation is recognized.

  Furthermore, in one embodiment of the present invention, the terminal of the reset switch SW702 is connected to the base of the transistor Q503 of the power switch 34 via the diode D600.

  When a test is performed to temporarily check the operation with the AC adapter disconnected from the AC outlet, the base potential of the transistor Q503 is maintained at a high level by the resistor built-in digital transistor DT502. The transistor Q503 of the power switch 34 serving as a power switching unit is in an on state, and power is supplied from the DC power supply unit 35.

  At this time, in order to stop the power supply from the DC power supply unit 35, a low level voltage is applied to the base of the transistor Q503 via the diode D600 by turning on the reset switch SW702. Even when the resistor built-in digital transistor DT502 is turned on, the transistors Q503 and Q502 are turned off. For this reason, the self-holding circuit including the transistors DT502, Q503, and Q502 does not operate, and the transistor DT502 is turned off.

  As a result, the reset switch SW702 is turned on even if the backup operation is performed in a power failure state or the operation is performed by supplying power from the DC power supply unit 35 with the AC adapter unit 38 removed from the AC outlet. In this state, the power supply from the DC power supply unit 35 can be forcibly stopped.

  In the above operation, it is assumed that the reset switch SW702 is composed of a momentary switch and is turned on only while the switch is pressed. The reset operation is confirmed by pressing this switch for a short time.

  FIG. 6 is a timing chart showing the relationship between on / off of the reset switch as the reset means, the potential of the input port Y of the microcomputer unit 21, and the on / off of the LED 39 as the display means.

  As shown in FIG. 6A, when the reset switch SW702 is turned on for a short time, a short-time low-level voltage is applied to the input port Y of the microcomputer unit 21, and then a high-level potential is applied. Thus, a normal reset operation is performed.

  In this case, the LED 39 as a display means for displaying the reset state is forcibly turned on, that is, turned on (displayed) while the reset switch SW702 is in the on state. On the other hand, even if the reset switch SW702 is turned off, the LED 39 performs a short-time off, on, and off blinking operation by the microcomputer unit 21 to notify that it has been reset. The base potential of the transistor Q503 is kept on when the reset switch SW702 is turned on for a short time, and the transistor Q502 is also kept on. Therefore, the DC power supply unit 35 supplies power to the microcomputer unit 21. Continue to be supplied.

  Next, a case where the wireless master device 60 is intentionally stopped will be described. As shown in FIG. 6B, when the reset switch SW702 is intentionally turned on for a long time, a low level voltage is always input to the input port Y of the microcomputer unit 21. At this time, the electric charge of the capacitor CC706 is discharged, the transistor Q503 is turned off, and the transistor Q502 is also kept off. As a result, no power is supplied from the DC power supply unit 35 to the microcomputer unit 21, so that the LED 39 is turned on and then turned off. This unlit state means that backup of power from the DC power supply unit 35 is forcibly stopped.

  In this way, even if the backup operation is performed in a power failure state, or the operation is performed by supplying power from the DC power supply unit 35 with the AC adapter unit 38 removed from the AC outlet, the reset switch is By turning on the power source for a long time, it is possible to confirm in the state of the LED 39 that the supply of power from the DC power supply unit 35 is stopped and the operation of the wireless master device 60 is stopped. In other words, this operation is performed when the operation is manually shifted from the reset operation to the operation stop of the wireless master unit, but the operation stop is visually confirmed by the change from the lighting of the LED 39 to the turn-off. Can do.

  If the backup of the power from the DC power supply unit 35 is terminated after a certain time by the operation of the microcomputer unit 21 instead of the artificial operation of the reset switch, there may be no confirmer. Since there is no need to visually check whether the LED is turned on or off, the LED lighting operation can be omitted.

  In the wireless device of the present invention, the backup time by the battery can be freely set at the time of a power failure, and when the AC adapter is disconnected from the AC outlet, the backup by the battery is performed for a predetermined time. The operation can be performed, and thereafter the power supply from the battery can be cut off.

  According to the domestic power situation, the power outage time is within a few hours, and the time exceeding this time is extremely rare. Therefore, the power outage is assumed to be the state where the AC adapter is disconnected from the AC outlet. However, it does not deviate greatly from the actual situation. Regardless of which state occurs, the replacement of the battery as the backup power source can be reduced by suppressing the wasteful consumption of the battery.

  In addition, by configuring the wireless master device of the present invention as described above, even if a backup drive test is performed for a short time using a battery in a field installation work or the like, the reset switch is operated to operate the battery. Backup operation can be forcibly stopped. For this reason, after performing a driving test using a battery, it is not necessary to disconnect the battery connector and stop the backup operation by the battery.

  In addition, even in the production line, when performing an operation test or inspection with the battery mounted, the power supply by the battery can be forcibly stopped by operating the reset switch. It is possible to save the trouble of unplugging and inserting the battery again.

  The embodiment disclosed above should be considered as illustrative in all points and not restrictive. The scope of the present invention is shown not by the above embodiments but by the scope of claims, and includes all modifications and variations within the meaning and scope equivalent to the scope of claims.

It is a block diagram which shows an example of the whole structure of the data communication system using the radio | wireless apparatus of this invention between a terminal network control apparatus and a meter. It is a block diagram which shows an example of the whole structure of the wireless main | base station with a terminal network control apparatus in FIG. FIG. 3 is a block diagram showing a schematic configuration of a main power supply control unit in FIG. 2 partially using circuit components. It is a flowchart which shows the first half of the operation | movement at the time of a power failure and the time of a power failure recovery in the data communication system using the radio | wireless apparatus of this invention between a terminal network control apparatus and a meter. 6 is a flowchart showing the second half of the operation at the time of power failure and at the time of power failure recovery in the data communication system using the wireless device of the present invention between the terminal network control device and the meter. 3 is a timing chart showing the relationship between on / off of a reset switch, potential of an input port of a microcomputer unit, and on / off of an LED in the wireless master device with a terminal network control device of FIG. It is a block diagram which shows an example of the whole structure of the data communication system by the conventional no ringing communication. It is a block diagram which shows an example of the whole structure of the conventional data communication system which used the radio | wireless apparatus between the terminal network control apparatus and the meter.

Explanation of symbols

1: host device, 13: telephone line, 15, 16, 17: wireless slave unit, 34: power switch, 35: DC power supply unit, 37: power failure detection circuit, 38: AC adapter unit, 39: LED, 41: Storage unit, 43: reset circuit unit, 60: wireless master unit with terminal network control device.

Claims (8)

A wireless master device for performing information communication through a terminal network control device connected to a host device via an information network;
With a wireless slave connected wirelessly to this wireless master,
The wireless master unit includes AC power supply means for supplying power from an AC power supply, and DC power supply means for supplying power from a battery,
In the event of a power failure in which power is not supplied from the AC power supply means, the wireless master unit performs a backup operation with the power supplied from the DC power supply means, and stops the backup operation after a predetermined time has elapsed. .   The wireless device according to claim 1, wherein the wireless master device includes a terminal network control device.   The wireless master unit transmits power failure information that informs the wireless slave device that there is a power failure at the time of a power failure, and power failure recovery information that informs the wireless slave device that it has recovered from the power failure when the power is restored from the power failure. The radio apparatus according to claim 1 or 2, which transmits the radio apparatus.   The wireless slave device stores communication information when receiving power outage information from the wireless master device, and transmits communication information to the wireless master device when receiving power failure recovery information from the wireless master device. 3. The wireless device according to 3.   The wireless device according to any one of claims 1 to 4, wherein the wireless master device transmits power failure information notifying the host device of a power failure at the time of a power failure.   The wireless base unit includes a reset unit that resets an operation, and the power supply from the DC power supply unit during a power failure is stopped by turning on the reset unit. The wireless device according to any one of claims 1 to 5.   The wireless master device has display means for displaying a reset state, and the display means shifts from a display state to a non-display state as time elapses for turning the reset means on. Item 7. The wireless device according to Item 6. A wireless master device used in a wireless device for performing information communication through a terminal network control device connected to a host device via an information network,
AC power supply means for supplying power from an AC power supply,
DC power supply means for supplying power from the battery;
A power failure detection means that is connected to the AC power supply means and detects a power failure state in which power is not supplied from the AC power supply means;
Power switching means for switching to power supply from the DC power supply means according to the detection of the power failure detection means,
Control means for performing a backup operation with the power supplied from the DC power supply means, and controlling to stop the backup operation after a predetermined time has elapsed,
Wireless master unit equipped with.

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