JP3334847B2 - Automatic notification device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an interface and an automatic notifying device, and more particularly, to an automatic notifying device for a gas,
At least one or more meter reading means can be connected to collect meter reading information on the usage status of water supply, electricity, etc. via a communication line, and the meter reading information for each meter reading means is collected and automatically reported to an information center. To a device that

[0002] A specific automatic reporting device can be connected to at least one or more meter reading means for collecting meter reading information on the usage status of gas such as LP gas through a communication line. The present invention relates to a device for collecting information via a telephone line and automatically reporting the information to an information center.

[0003]

2. Description of the Related Art FIG. 6 is a circuit diagram for explaining an interface provided in a meter reading meter communication section in a conventional automatic notification device.

FIG. 7 is a timing chart for explaining the operation of the interface shown in FIG.
It is Ri wave Katachidea transmission request signal inputted to the connection point A,
FIG. 7B shows ON / OF of the first photocoupler PC1.
FIG. 7C shows the waveform of the transmission request signal output from the terminal DT.

Conventionally, as this type of interface, for example, an interface as shown in FIG. 6 has been disclosed.

An interface 9A shown in FIG. 6 is a meter reading means (specifically, a meter meter with a built-in microcomputer) for collecting meter reading information on the usage of gas such as LP gas through a communication line. (Microcomputer gas meter) Provided in a meter reading meter communication unit (not shown) in an automatic notification device that collects meter reading information (specifically, electronic message information) for each one via a telephone line and automatically notifies the information center. Had been.

[0007] A controller (specifically, a CPU) (not shown) provided in the automatic notification device transmits a transmission request signal (see FIG. 7A) for prompting transmission of meter reading information to the connection point A. /> To the meter reading communication section.

As shown in FIG. 7 (b), the meter reading communication section that has received the transmission request signal, as shown in FIG. 7 (b), provides a photocoupler PC1 (first A photodiode connected between the first power supply Vcc and the connection point A , and a second power supply VSUB-
By activating (that is, turning on) a photoelectric conversion element formed of a phototransistor connected between the terminals DT according to the LOW state of the transmission request signal, FIG.
As shown in (c), the transmission request signal has been transmitted to the meter reading means 1 via the terminal DT.

On the other hand, when the transmission request signal is received via the communication line, a capacitor C1 is provided at the input stage of the meter reading means 1 in order to remove noise superimposed on the transmission request signal.
And the resistor R are provided in parallel between the communication line and the ground potential.

Since such a capacitor C1 and a resistor R function as a noise cut filter, noise superimposed on the transmission request signal is removed and only the transmission request signal is transmitted to the CPU provided inside the meter reading means 1. We were able to.

However, the capacitor C1 and the resistor R
By providing a noise cut filter using
While the noise superimposed on the transmission request signal can be removed, the transmission request signal is also affected by the discharge characteristic of the capacitor C1, and as a result, as shown in FIG.
There is a technical problem that the waveform of the transmission request signal transmitted to the terminal DT is dull due to the influence of the discharge characteristics of the capacitor C1 and the resistor R.

FIG. 8 is a circuit diagram for explaining a conventional interface for improving the responsiveness of the meter reading communication unit in the automatic notification device of FIG.

FIG. 9 is a timing chart for explaining the operation of the interface shown in FIG.
It is Ri wave Katachidea transmission request signal inputted to the connection point A,
9 (b) is a wave form of the drive signal input to the connection point B
Ah is, FIG. 9 (c), ON / O of the photo coupler PC1
FIG. 9D shows the photocoupler PC2 in the FF state.
A of the ON / OFF state, FIG. 9 (e) Ru wave Katachidea of the drive signal output from the terminal DT.

For the purpose of preventing the waveform of the transmission request signal from becoming dull due to such discharge characteristics of the capacitor C1 and the resistor R, as shown in FIG.
Is connected to the ground potential for a predetermined time via the terminal DT to execute a control for promptly discharging the accumulated charge of the capacitor C1 and to provide a photo-electrical circuit provided for the purpose of electrically separating the telephone line from the ground potential. Coupler PC2 (first power supply Vc
An interface 9B provided with a photoelectric conversion element composed of a photodiode connected between c and a connection point b and a phototransistor connected between a ground potential and a terminal DT, and an automatic notification device using the interface 9B. It has been disclosed.

When a meter reading communication section having such an interface 9B receives a transmission request signal as shown in FIG. 9A, the communication between the telephone line and the ground potential is made as shown in FIG. 9C. As shown in FIG. 9 (e), by activating (ie, turning on) the photocoupler PC1 provided in the interface 9B for the purpose of electrically isolating the signal according to the LOW state of the transmission request signal, It had a function of transmitting the transmission request signal in the Hi state to the meter reading means 1 via the terminal DT.

Further, as shown in FIG. 9B, the meter reading meter communication unit deactivates the photocoupler PC1 in accordance with the Hi state of the transmission request signal, and at the same time, the photocoupler PC2 provided in the interface 9B. Is activated (that is, turned on), the capacitor C1 is connected to the terminal DT.
9 is connected to the ground potential for a predetermined period of time (specifically, the duration of the Hi state of the transmission request signal at this time) and the control for promptly discharging the accumulated charge of the capacitor C1 is executed. As shown in (e), from the Hi state to the Lo state
It had a function to avoid dulling of the transmission request signal described above when transitioning to the w state.

[0017]

However, in such a conventional interface 9B and an automatic notification device using the same, the interface 9B is connected to the connection point A- terminal DT.
In the case where the photocoupler PC2 is provided between the photocoupler PC1 and the photocoupler PC1 which is already provided in the interface 9A in the past.
There is a technical problem that a new connection point B is required to newly add a new connection point and to drive the photocoupler PC2.

Further, there is a technical problem that the addition of the photocoupler PC2 has a greater effect on the device cost than the addition of the transistor, the resistor, and the capacitor, and may cause a significant increase in cost. .

For the same purpose, the necessity of a new connection point b may cause a change in the number of terminals in an existing terminal plate or connector, or an increase in a new terminal plate or connector. There was a technical problem that it had a large impact and could cause a significant cost increase.

An object of the present invention is to solve such a conventional problem. In particular, the first transistor for generating a timing signal and the first transistor are activated in response to a transmission request command signal. A first driving unit having a photocoupler for promoting generation of a timing signal by
A discharge time setting circuit for generating a second drive signal for controlling the discharge time of the stored charge in synchronization with the timing signal; and activating the discharge time according to the second drive signal and discharging the stored charge. And the second driving means having the second transistor for controlling the photocoupler, it is not necessary to add a photocoupler, and as a result, a simple configuration that does not require a new terminal for driving the photocoupler is provided. It has an object to provide an automatic reporting device using br /> interface.

Further, depending on the possible expansion of such photo-coupler is not required, and an object of the invention to provide an automatic notification device using the interface of a simple structure which can reduce the influence of the apparatus cost.

For the same purpose, no new terminal is required,
Automatic extension of the number of terminals changes and a new terminal plate and connectors in existing terminal plate and connectors is not necessary, as a result, with Intafe <br/> over scan of a simple structure which can reduce the influence of the apparatus cost It is an object to provide a notification device.

[0023]

According to the first aspect of the present invention, meter reading information relating to the usage status of gas, water, electricity, etc. is stored.
Automatic reporting device with meter reading means for collection
The transmission request command signal to control the collection of meter reading information.
It is provided in the meter reading meter communication part of the controller that generates,
Sending a transmission signal in accordance with the transmission request command signal to the meter reading means
To the input stage and superimposed on the transmission signal
The input stage is configured to remove noise from the transmitted signal.
Charged to the capacitors that compose the time constant circuit
Execute control to discharge stored charge at a predetermined timing
Interface that is configured to
It consists of an ion and a phototransistor.
A photocoupler that is turned on / off by a request signal,
The base of the collector of the phototransistor of the photocoupler
To the ON state when the photocoupler is turned on.
A first transistor comprising:
The first transistor that is turned on while the data is on
And generating a first drive signal as the transmission signal.
In addition, when the phototransistor is switched from ON to OFF,
To the first transistor that keeps ON after
For controlling the discharge timing of the stored charge.
First driving means for generating an imaging signal;
Control that prompts the discharge of the stored charge in synchronization with the
A second drive signal for controlling the duration of the operation
And second driving means for generating the second driving means.
Has a capacitor and a resistor connected in series,
Differentiating the timing signal to generate the second drive signal
A discharge time setting circuit comprising a differentiating circuit,
Connected to the input of the stage in parallel with the meter reading means,
Activated by a signal and discharging the stored charge
And a second transistor for controlling
Automatic notification device .

According to the first aspect of the present invention, it is possible to prevent the transmission signal 32a from being input to the device with a dull waveform due to the influence of the discharge characteristic of the input capacitor C1. Play. As a result, the transmission signal 32a
This makes it possible to transmit accurate timing information to the input stage to the device.

[0025]

[0026] an effect that it becomes possible to avoid that the transmit signal 32a under the influence of the discharge characteristics of the input capacitance C1 from being input to the apparatus by a waveform dulled. As a result, when the transmission signal 32a is transmitted to the device, there is an effect that accurate timing information using the transmission signal 32a can be transmitted to the input stage to the device.

[0027]

The transmission signal 32a to be transmitted to the meter reading unit 12 to request test needle information 12a_1 is the input capacitance C1
Thus, it is possible to prevent the waveform from being input to the meter reading means 12 with a dull waveform due to the influence of the discharge characteristics. As a result, the transmission signal 32 is sent to the meter reading means 12.
When a is transmitted, accurate timing information using the transmission signal 32a can be transmitted to the input stage of the meter reading means 12, and the meter reading means 12 automatically reads the meter reading information 12a_1 in a state of being accurately synchronized with the transmission signal 32a. This has the effect of enabling communication with the notification device 10.

[0029]

The transmission signal is transmitted via the communication line 4 to the needle means 12 to request test needle information 12A_1 32
This has the effect that it is possible to avoid that a is input to the meter reading means 12 with a dull waveform affected by the discharge characteristics of the input capacitance C1. As a result, when the transmission signal 32a is transmitted to the meter reading means 12, the transmission signal 32a
a, the accurate timing information can be transmitted to the input stage of the meter reading means 12, and the meter reading means 12 can communicate the meter reading information 12a_1 to the automatic reporting device 10 in a state of being accurately synchronized with the transmission signal 32a. It works.

[0031]

By providing the interface 30 as described above, the transmission signal 32a transmitted to the meter reading means 12 via the meter reading communication section 237 in order to request the meter reading information 12a_1 becomes the discharge characteristic of the input capacitance C1. There is an effect that it is possible to avoid input to the meter reading means 12 with a dull waveform affected by the influence. As a result, the transmission signal 32 is sent from the controller 20 to the meter reading means 12.
When a is transmitted, accurate timing information using the transmission signal 32a can be transmitted to the input stage of the meter reading means 12, and the meter reading means 12 automatically reads the meter reading information 12a_1 in a state of being accurately synchronized with the transmission signal 32a. There is an effect that communication with the controller 20 of the notification device 10 becomes possible.

[0033]

The meter reading at test first driving signal 32a to the needle information 12a_1 meter reading unit 12 in order to request is transmitted via the needle meter communication unit 237, dull under the influence of the discharge characteristics of the input capacitance C1 waveform There is an effect that the input to the means 12 can be avoided. As a result, when the first drive signal 32a is transmitted from the controller 20 to the meter reading means 12, accurate timing information using the first drive signal 32a can be transmitted to the input stage of the meter reading means 12, and the meter reading means 12 can read The automatic metering device 1 sends the meter reading information 12a_1 in a state where it is accurately synchronized with the first drive signal 32a.
This makes it possible to communicate with the 0 controller 20.

The first driving means 32 having the functions as described above .
By providing the second driving means 34 and the second driving means 34, there is an effect that it is not necessary to add a photocoupler.
As a result, there is an effect that the interface 30 having a simple configuration that does not require a new terminal for driving the photocoupler and the automatic notification device 10 using the same can be realized.

Also, since the need for additional photocouplers is eliminated, it is possible to realize an interface 30 having a simple configuration capable of reducing the influence on the device cost and an automatic notification device 10 using the interface. It works.

For the same purpose, no new terminal is required,
This has the effect of eliminating the need to change the number of terminals in an existing terminal plate or connector or to add a new terminal plate or connector. As a result, there is an effect that the interface 30 having a simple configuration that can reduce the influence on the device cost and the automatic notification device 10 using the interface 30 can be realized.

[0038]

[0039]

[0040]

The first driving means 32 having the functions as described above
By generating the timing signal 32b using
When transmitted to the meter reading means 12 via the meter reading communication section 237 in order to request the meter reading information 12a_1, the information is input to the meter reading means 12 with a dull waveform under the influence of the discharge characteristic of the input capacitance C1. Can be avoided at an accurate timing. As a result, the first drive signal 32a is sent from the controller 20 to the meter reading means 12.
Is transmitted, accurate timing information using the first drive signal 32a can be transmitted to the input stage of the meter reading means 12, and the meter reading information 12 is accurately synchronized with the first drive signal 32a. 12a_1 can be communicated to the controller 20 of the automatic notification device 10.

[0042]

By accurately setting the discharge time T using the discharge time setting circuit 342 as described above , the meter reading information 1
When transmitted to the meter reading means 12 via the meter reading communication section 237 to request 2a_1, the accumulated charge of the input capacitance C1 can be sufficiently discharged based on the discharge time T, and the discharge of the input capacitance C1 can be performed. There is an effect that it is possible to avoid being input to the meter reading means 12 with a dull waveform affected by the characteristics at an accurate timing and with good reproducibility. As a result, when the first drive signal 32a is transmitted from the controller 20 to the meter reading means 12, accurate timing information using the first drive signal 32a can be transmitted to the input stage of the meter reading means 12, and the meter reading means 12 can read The meter reading information 12a_1 is accurately synchronized with the first drive signal 32a.
Can be communicated to the controller 20 of the automatic notification device 10.

Further, the discharge time setting circuit 3 having such a configuration is used.
By providing 42, there is an effect that it is not necessary to add a photocoupler. As a result, there is an effect that the interface 30 having a simple configuration that does not require a new terminal for driving the photocoupler and the automatic notification device 10 using the same can be realized.

Further, since it is not necessary to increase the number of photocouplers, it is possible to realize the interface 30 having a simple configuration capable of reducing the influence on the device cost and the automatic notification device 10 using the same. It works.

For the same purpose, no new terminal is required.
This has the effect of eliminating the need to change the number of terminals in an existing terminal plate or connector or to add a new terminal plate or connector. As a result, there is an effect that the interface 30 having a simple configuration that can reduce the influence on the device cost and the automatic notification device 10 using the interface 30 can be realized.

[0047]

By accurately setting the discharge time T using the differentiating circuit 342 as described above , the meter reading information 12a_1
To the meter reading means 12 in order to request
7, the accumulated charge of the input capacitor C1 can be sufficiently discharged based on the second drive signal 34a generated by the differentiating circuit 342, and is affected by the discharge characteristics of the input capacitor C1. There is an effect that it is possible to avoid being input to the meter reading means 12 with a dull waveform at an accurate timing and with good reproducibility. As a result, the first drive signal 32a is sent from the controller 20 to the meter reading means 12.
Is transmitted, accurate timing information using the first drive signal 32a can be transmitted to the input stage of the meter reading means 12, and the meter reading information 12 is accurately synchronized with the first drive signal 32a. 12a_1 can be communicated to the controller 20 of the automatic notification device 10.

Further, by providing the differentiating circuit 342 having such a configuration, there is an effect that it is not necessary to add a photocoupler. As a result, the interface 30 having a simple configuration that does not require a new terminal for driving the photocoupler, and the automatic notification device 1 using the interface 30
0 is realized.

Further, since it is not necessary to add such a photocoupler, it is possible to realize an interface 30 having a simple configuration capable of reducing the influence on the apparatus cost and the automatic notification apparatus 10 using the same. It works.

For the same purpose, no new terminal is required.
This has the effect of eliminating the need to change the number of terminals in an existing terminal plate or connector or to add a new terminal plate or connector. As a result, there is an effect that the interface 30 having a simple configuration that can reduce the influence on the device cost and the automatic notification device 10 using the interface 30 can be realized.

[0052]

[0053] Depending on the immobilizing input capacitance C1 with condensers C2, an effect that it becomes able improve the stability and reproducibility of the removal characteristics of the noise.

As a result, the discharge time T, the timing signal 3
2b and the second drive signal 34a can be set accurately, and the accumulated charge of the input capacitor C1 can be sufficiently discharged with good reproducibility.

[0055]

Embodiments of the present invention will be described below with reference to the drawings.

[0056] The interface 30 (specifically, the microcomputer gas meter 12 is a meter reading meter microcomputer built) metering means 12 for gathering the message information 12a according to the usage of a gas such as LP gas per Meter reading information 1
(Specifically, message information 12a) 2A_1 is provided on the needle meter communication unit 237 of the automatic reporting device 10 for automatically notifying the collect to the information center 1 (described later).

First, an embodiment of the interface 30 will be described.

FIG. 1 is a circuit diagram for explaining the basic configuration of the interface 30 of the present invention.

[0059] The microcomputer gas meter 12, as shown in FIG. 1, the first driving signal 3 is a transmission signal 32a to propagate
It is desirable to use a capacitor C2 as an input capacitor C1 constituting a time constant circuit provided in an input stage for removing noise superimposed on 2a (described later) from the first drive signal 32a.

As described above, by fixing the input capacitance C1 by using the capacitor C2, there is an effect that the stability and reproducibility of the noise removal characteristic can be improved.

As a result, the discharge time T, the timing signal 3
2b and the second drive signal 34a can be set accurately, and the accumulated charge of the input capacitor C1 can be sufficiently discharged with good reproducibility.

[0062] interface 30 shown in FIG. 1 is connected between the equalizing <br/> Ngasumeta 12, My conga Sumeta 12
When a signal is transmitted to the microcomputer gas meter 12, the accumulated charge charged in the input capacitance C1 of the input stage of the
It has a function of executing control for discharging at a predetermined timing with respect to the drive signal 32a.

[0063] Depending on the provision of such a feature, the microcomputer gas meter 12 to request the message information 12a
First drive signal 32a to be transmit is microcomputer gas meter 1 with dull under the influence of the discharge characteristics of the input capacitance C1 waveform
2 can be avoided. As a result, the microcomputer gas meter 12
When the first drive signal 32 a is transmitted to the microcomputer gas meter 12, accurate timing information using the first drive signal 32 a can be transmitted to the input stage of the microcomputer gas meter 12.
Has an effect that the electronic message information 12a can be communicated to the automatic notification device 10 in a state where the electronic message information 12a is accurately synchronized with the first drive signal 32a.

The embodiment of the interface 30 will be described in more detail.

The interface 30 includes a first driving unit 32
And a second driving unit 34.

The first driving means 32, as shown in FIG.
It has a function of generating a first drive signal 32a that is the first drive signal 32a in response to the transmission request command signal 20a.

The first drive means 32 has a function of generating a timing signal 32b for controlling the discharge timing of the accumulated charge at a predetermined timing with respect to the first drive signal 32a.

The first driving means 32 having such a function
Electrically separates the telephone line 4 from the ground potential in accordance with the first transistor TR1 for generating the timing signal 32b and the transmission request command signal 20a, and
Activate the transistor TR1 and set the timing signal 32b
The main part is a photocoupler PC that promotes the generation of the image.

The photocoupler PC includes a photodiode as a light emitting element connected between the first power supply Vcc and the connection point A , and a second power supply VSUB via the second transistor TR2.
-A photoelectric conversion element configured by combining a phototransistor as a light receiving element connected between the ground potentials.

The photodiode is activated in response to the LOW state of the transmission request command signal 20a input to the connection point A, and has a function of activating the phototransistor.

The phototransistor is an npn transistor and has a function of being activated in response to the activation of the photodiode to promote the activation of the first transistor TR1. The emitter is connected to the ground potential, and the collector is connected to the first transistor TR1. It is connected to the base of transistor TR1.

The first transistor TR1 is a pnp transistor, the emitter of which is connected to the second power supply VSUB,
The base is connected to the collector of the phototransistor,
The collector is connected to the collector of the second transistor TR2.

By generating the timing signal 32b using the first driving means 32, the electronic message information 12a
Is transmitted to the microcomputer gas meter 12 via the meter reading meter communication unit 237 in order to request that the signal is input to the microcomputer gas meter 12 with a dull waveform due to the influence of the discharge characteristic of the input capacitance C1. This has the effect of being able to avoid at the timing. as a result,
When the first drive signal 32 a is transmitted from the controller 20 to the microcomputer gas meter 12, accurate timing information using the first drive signal 32 a is transmitted to the microcomputer gas meter 12.
Can be transmitted to the input stage, and the microcomputer gas meter 12 can accurately transmit the message information 12 in synchronization with the first drive signal 32a.
a can be communicated to the controller 20 of the automatic notification device 10.

The second driving means 34, as shown in FIG.
It has a function of executing control for prompting the discharge of the stored charge at a predetermined timing with respect to the first drive signal 32a.

Further, the second drive means 34 has a function of generating a second drive signal 34a for controlling the discharge time T of the accumulated charge in synchronization with the timing signal 32b.

The second driving means 34 having such a function.
Is activated by a discharge time setting circuit 342 for generating a second drive signal 34a for controlling the discharge time T of the accumulated charge in synchronization with the timing signal 32b, and by a discharge time T corresponding to the second drive signal 34a. In addition, a second transistor TR2 for controlling the discharge of the stored charge is configured as a main part.

The specific discharge time setting circuit 342 is mainly composed of a differentiating circuit 342 for differentiating the timing signal 32b to generate the second drive signal 34a.

The differentiating circuit 342 generates the timing signal 32b
To differentiate the capacitor C2 and the resistance element R
1 and R2 are connected in series in this order between the collector of the phototransistor and the ground potential.

The second drive signal 34a is output from a connection point b between the resistance elements R1 and R2.

The second transistor TR2 is an npn transistor, the base of which is connected to the connection point b between the resistor R1 and the resistor R2, the emitter connected to the terminal TC5, and the collector connected to the first transistor TR2. TR
One collector (point a in FIG. 1) and TC4 are connected in parallel.

The second transistor TR2 having such a configuration
Is activated in accordance with the Hi state of the second drive signal 34a, and has a function of discharging the accumulated charge of the capacitor C1 to the ground point as the current I.

By accurately setting the discharge time T using such a differentiating circuit 34 2, when transmitted to the microcomputer gas meter 12 via the meter reading communication unit 237 in order to request the electronic message information 12 a, The accumulated charge of the input capacitance C1 can be sufficiently discharged based on the second drive signal 34a generated by the differentiating circuit 342, and is input to the microcomputer gas meter 12 with a dull waveform affected by the discharge characteristics of the input capacitance C1. This has the effect of avoiding the occurrence of an error at an accurate timing and with good reproducibility. As a result, when the first drive signal 32a is transmitted from the controller 20 to the microcomputer gas meter 12, accurate timing information using the first drive signal 32a can be transmitted to the input stage of the microcomputer gas meter 12, and the microcomputer gas meter 12 The electronic message information 12a is sent to the controller 2 of the automatic notification device 10 in a state where the electronic message information 12a is accurately synchronized with the drive signal 32a.
This has the effect of enabling communication to be performed to 0.

Further, by providing the differentiating circuit 342 having such a configuration, there is an effect that it is not necessary to add a photocoupler. As a result, the interface 30 having a simple configuration that does not require a new terminal for driving the photocoupler, and the automatic notification device 1 using the interface 30
0 is realized.

In addition, since it is not necessary to increase the number of photocouplers, it is possible to realize an interface 30 having a simple configuration that can reduce the influence on the apparatus cost and the automatic notification apparatus 10 using the interface 30. It works.

For the same purpose, no new terminal is required.
This has the effect of eliminating the need to change the number of terminals in an existing terminal plate or connector or to add a new terminal plate or connector. As a result, there is an effect that the interface 30 having a simple configuration that can reduce the influence on the device cost and the automatic notification device 10 using the interface 30 can be realized.

Next, an embodiment of an LP gas home security system using the automatic notification device 10 will be described.

FIG. 2 is a functional block diagram showing an LP gas home security system to which the automatic notification device 10 according to the present invention is applied.

In FIG. 2, 1 is an information center,
Host computer 1a, DTMF (dual tone multi-frequency) transceiver 1b, and subscriber telephone 1
c and is connected to a nearby telephone exchange (not shown) via a telephone line 4 which is a form of a communication line.

[0089] Each automatic reporting device 10, ..., 10, as shown in FIG. 2, the microcomputer gas meter 12 for gas, water, such message information 12a usage such as electricity collection
Are connected at least one. Each of the automatic notification devices 10,..., 10 has a controller 20 that collects the message information 12a for each microcomputer gas meter 12 and automatically notifies the information center 1.

Microcomputer gas meter 1 in this embodiment
2 means that the usage status of gas, water, electricity, etc. (for example, meter reading values at predetermined intervals) is measured, the electronic message information 12a in a predetermined format is generated, and the electronic message information is 12a means an apparatus that transmits 12a to the automatic notification device 10.

In particular, the microcomputer gas meter 1 of the present embodiment
2 means that the usage status of gas such as LP gas is measured, the electronic message information 12a in a predetermined format is generated,
0 means a microcomputer gas meter 12 that transmits message information 12a to the automatic notification device 10 in response to a message request from 0.

The microcomputer gas meter 12 of the present embodiment is
It is desirable to use a microcomputer gas meter for LP gas which incorporates a microcomputer for executing various controls (hereinafter, two microcomputer gas meters 121 and 122 for LP gas are used as the microcomputer gas meter 12).
Will be described.)

The information center 1 and the automatic reporting device 10
The communication between the server and the server includes a no-ringing communication service (No-ringing Communication Service).
Service, one of the supplementary services of NTT subscriber telephone
It is desirable to use the automatic notification function in (1).

Further, all the automatic notification devices 10,..., 10
Are connected in the same configuration to the nearest telephone exchange (not shown) via the telephone line 4. The information center 1 is located at an LPG distributor, such as an LPG delivery place,
Each of the controllers 20,..., 20 is installed at the LPG consumer.

FIG. 3 is a functional block diagram for explaining a basic configuration of the automatic notification device 10 provided in the LP gas home security system of FIG.

Each of the automatic notification devices 10,..., 10 has the controller 20 as described above.

The controller 20 has a function of generating a transmission request command signal 20a for controlling the collection of the electronic message information 12a for each microcomputer gas meter 12.

The controller 20 transmits the transmission request command signal 2
0a, the transmission signal 32 via the interface 30
a meter communication unit 237 for transmitting a to the microcomputer gas meter 12.

By providing such an interface 30, the transmission signal 32a transmitted to the microcomputer gas meter 12 via the meter reading communication section 237 to request the electronic message information 12a is affected by the discharge characteristics of the input capacitance C1. Accordingly, it is possible to avoid an input to the microcomputer gas meter 12 with a dull waveform. As a result, when the transmission signal 32 a is transmitted from the controller 20 to the microcomputer gas meter 12, accurate timing information using the transmission signal 32 a can be transmitted to the input stage of the microcomputer gas meter 12.
Has an effect that the electronic message information 12a can be communicated to the controller 20 of the automatic notification device 10 in a state of being accurately synchronized with the transmission signal 32a.

The telephone line 4 is connected to terminals L1 and L2 of the controller 20, and the subscriber telephone 3b is connected to terminals T1 and T2.
However, terminals TC2 and TC3 have gas leak sensors 3c, and terminals TC4 and TC5 have shut-off valves (not shown).
A flow rate sensor switch (not shown) of the P gas meter (microcomputer gas meter 12) is connected to terminals TB1 to TB3, and a controller 3e for controlling a shutoff valve of the LP gas meter (microcomputer gas meter 12) 3d is connected to terminals TB4 and TB5. TC
1 is connected to a cylinder exchange switch 3f and an indicator LED 3g built in the switch 3f.

The gas leak sensor 3c is supplied independently with AC 100 [V] through an outlet.
[V], 0 [V] when power is turned off, 12 when gas leak is detected
[V] is applied to terminals TC2 and T
Supply to C3.

The flow rate sensor switch of the microcomputer gas meter 12 outputs a constant flow rate L through the microcomputer gas meter 12.
Each time the P gas flows, it is turned on to generate a pulse.

The microcomputer gas meter 12 has a function of creating the electronic message information 12a using the pulse and transmitting the electronic message information 12a to the controller 20 in accordance with the first drive signal 32a.

The controller 3e is connected to an AC10 through an outlet.
0 [V] is independently supplied, generates a shut-off valve closing drive signal for closing the shut-off valve in the microcomputer gas meter 12 in response to a gas shut-off signal from the controller 20, and also supplies an AC 100 [V] power Is supplied, a power failure signal is supplied to the terminal TB3 of the controller 20.

FIG. 4 is a circuit diagram for explaining the basic configuration of controller 20 provided in automatic notification device 10 of FIG.

As shown in FIG. 4, the controller 20
It has a microcomputer (CPU) 231. CP
U231 incorporates a ROM 231a storing a control program, a RAM 231b storing various data, and the like.
It operates according to a flowchart described later based on the control program in the ROM 231a and the data in the RAM 231b. The CPU 231 also has a parallel data input / output port IO, input ports I1 to I8, output ports O1 to O4, and the like.

A DTMFMODEM (modulation / demodulation circuit) 232 and a clock and calendar 233 are connected to the parallel data input / output port IO via a data bus DB.

The DTMF MODEM 232 has a crystal oscillator 232 a and performs conversion between 4-bit parallel data representing numbers 0 to 9 that can be processed by the CPU 231 and DTMF signals transmitted through the telephone line 4.

The DTMF signal is a combination of two different frequency signals, representing the numbers 0-9. The clock and calendar 233 have a crystal oscillator 233a, count the clock by a counter, generate date data including year, month and day, and time data including hour and minute, and supply them to the CPU 231. The contents of the counter of the clock and the calendar 233 are rewritten by the data supplied from the CPU 231 so that the date and time data generated by the clock and the calendar 233 are corrected.

A terminal TB3 is connected to the input port I1 via a power failure detection I / F (interface) 234, and a power failure detection signal generated by the controller 3e (see FIG. 3) at the time of a power failure is input.

A switch I / F 23 is connected to the input port I2.
5, a terminal TB4 is connected, and a cylinder exchange signal generated by turning on a cylinder exchange switch 3f (see FIG. 3) is input.

A gas leak detection I / F is connected to the input port I3.
The terminal TC2 is connected via the 236 and the gas leak sensor 3c (see FIG. 3)
A gas leak detection signal is input according to the voltage of 2 [V].

The message information 12a transmitted from the microcomputer gas meter 12 (see FIG. 3) is input to the input port I4.

The output of the battery detection circuit 238 is connected to the input port I5.
When the battery detection circuit 238 detects that the voltage at 39 has dropped below a certain value, a detection signal is input.

A 16 Hz circuit 240 is connected to the input port I6.
Is connected, and when the 16 Hz detection circuit 240 detects that the incoming call is being received from the outside through the telephone line 4 by detecting the 16 Hz calling signal applied through the capacitor C1, the incoming call detection signal is input. You.

The TEL detection circuit 24 is connected to the input port I7.
1 is connected, and when the TEL detection circuit 241 detects that the subscriber telephone set 3b is in use, an in-use detection signal is input.

The data setting switch 42 is connected to the input port I8. When the data setting switch 42 is turned on, a data setting signal is input.

A clock pulse generator 243 is connected to the clock input port CK.
The clock pulse used for the operation 1 is input. A power supply circuit 244 is connected to the power supply input port VDD, and a power supply voltage required for the operation of the CPU 231 is supplied.

On the other hand, the output port O 1 is connected to the cut-off I / F 24.
5 connected to the terminal TB1 and outputs a shut-off valve ON signal when closing the shut-off valve built in the microcomputer gas meter 12 (see FIG. 3). Output port O2 is LE
It is connected to the terminal TC1 via the D output I / F 246, and outputs an LED ON signal when lighting the LED 3g (see FIG. 3).

The output port O3 is connected to the control input of the switch circuit 247 and outputs a switch-on signal for turning on the switch circuit 247.

The switch circuit 247 turns on the switching transistor Q by turning on the switch circuit 247, and the telephone line 4
Is connected to the primary winding L1 of the coupling transformer T via the full-wave rectifier 248 and the switching transistor Q.

The secondary winding L2 of the coupling transformer T acts as a dummy load on the telephone line 4. The secondary winding L2 is connected to the DTFM M via the capacitor C2 and the amplifier 249.
The output of ODEM 232 is connected to DT via capacitor C3.
The inputs of the MF MODEM 232 are connected to each other.

As described above, while the switch-on signal is being output to the output port O 3, the DTM is transmitted between the automatic reporting devices 10,.
It is possible to exchange data by the F signal.

The output port O4 is connected to the voltage converter 250
And outputs an ON signal when the power supply voltage V2 is supplied to the DTMF MODEM 232, the amplifier 249, and the like via the power supply converter 250.

The power supply converter 250 includes the power supply circuit 24.
4 is supplied.

The power supply circuit 244 is connected to the terminal TC2 via the resistor R and the diode D1, and is connected to the gas leak sensor 3c.
And the voltage of the lithium battery 239 is supplied via the diode D2.

Reference numeral 251 denotes a manual changeover switch, which connects the 16 Hz detection circuit 240, the TEL detection circuit 241 and the full-wave rectifier 248 to the telephone line 4 together with the subscriber's telephone 3b when the contact a is present as shown in the figure. The telephone line 4 is connected to the subscriber's telephone 3b
Only to connect. A relay circuit 252 functions to disconnect the subscriber telephone set 3b from the telephone line 4 when a switch-on signal is output to the output port O3.

Next, the controller 20 having the newly added connection state recognition function will be described.

The controller 20 has a predetermined recognition timing before communication with each microcomputer gas meter 12 in addition to the conventional meter reading processing function (described later).
Recognition of the connection state with the microcomputer gas meter 12 that generated the communication request is performed using communication, and the microcomputer gas meter 12 whose connection response has been confirmed is recognized as the microcomputer gas meter 12 in the connected state, and the connection state has been recognized. The feature is that the microcomputer gas meter 12 has a function of executing collection of the message information 12a (connection state recognition function).

CPU provided in controller 20
Reference numeral 231 has a function of recognizing a connection state with respect to the microcomputer gas meter 12 for which a communication request has occurred at a recognition timing at the time of reset.

Here, the reset means that the controller 20
And a process of directly resetting hardware in the automatic notification device 10 and a process of returning control software to an initial state.

By providing such a function, the controller 20 executes communication with the microcomputer gas meter 12 at the recognition timing at the time of resetting, and based on the connection response result, changes the connection state of the microcomputer gas meter 12 without manual operation. This makes it possible to execute the meter reading process more quickly and accurately than before.

In addition, the connection state of the microcomputer gas meter 12 can be recognized without human intervention based on the result of the electronic communication with the microcomputer gas meter 12, so that the meter reading process can be executed more quickly and accurately than in the past. Even if a connection change operation, an additional connection operation, a removal operation, or the like of the gas meter 12 occurs, the connection change operation, the additional connection operation, the removal operation, or the like of the microcomputer gas meter 12 is performed at the information recognition center at the time of resetting. There is an effect that recognition can be performed accurately and quickly using remote communication based on control from one side.

Further, the CPU 231 controls the automatic notification device 10
Has a function of recognizing the connection state with respect to the microcomputer gas meter 12 that has issued the communication request at the recognition timing when the power is turned on.

By providing such a function, the controller 20 communicates with the microcomputer gas meter 12 at the recognition timing when the power is turned on, and manually controls the connection state of the microcomputer gas meter 12 based on the connection response result. This makes it possible to execute the meter reading process more quickly and accurately than before.

Further, the connection state of the microcomputer gas meter 12 can be recognized without human intervention based on the result of the electronic communication with the microcomputer gas meter 12, so that the meter reading process can be executed more quickly and accurately than in the past. Even when a connection change operation, an additional connection operation, or a removal operation of the gas meter 12 occurs, the connection change operation, the additional connection operation, the removal operation, or the like of the microcomputer gas meter 12 is included in the recognition timing at power-on. There is an effect that recognition can be made accurately and quickly using remote communication based on control from the center 1.

The CPU 231 controls the microcomputer gas meter 12
Message information 12 having a predetermined format received from
It has a function (telegram communication function) of recognizing the connection state with respect to the microcomputer gas meter 12 that has transmitted the telegram information 12a using a.

Specifically, the CPU 231 transmits a communication request command to the microcomputer gas meter 12 that has issued the communication request, receives the electronic message information 12a from the microcomputer gas meter 12 that has received the communication request instruction, and receives the received electronic message information. 12a using the message information 12a included in the message information 12a.
The connection state is recognized for the microcomputer gas meter 12 that has transmitted “a”, and the above-described message communication function is executed.

By providing such a message communication function, the controller 20 receives the message information 12a from the microcomputer gas meter 12 at the time of resetting or at the time of power-on, and receives the message information 12a included in the message information 12a. By diverting the contents of (1), the connection state of the microcomputer gas meter 12 can be recognized without manual operation, and an effect is obtained that a more rapid and accurate meter reading process can be executed as compared with the related art.

By using the contents of the electronic message information 12a included in the result of the reception of the electronic message information 12a from the microcomputer gas meter 12, the connection state of the microcomputer gas meter 12 can be recognized without any manual operation. Even when the connection change work, the additional connection work, the removal work, or the like of the microcomputer gas meter 12 occurs as a result of the prompt and accurate meter reading processing being performed, the microcomputer gas meter 12 can be recognized at the power-on recognition timing. It is possible to recognize the connection change work, the additional connection work, the removal work, and the like accurately, efficiently, and quickly by using the remote communication based on the control from the information center 1.

Further, the controller 20 has a display means (not shown) for displaying the recognized connection status of the microcomputer gas meter 12 at the time of power-on or at the time of resetting.

As the display means (not shown), an LED for displaying the connection status of the microcomputer gas meter 12 by blinking is used.
It is desirable to use (Light Emitting Diode) (not shown). Note that the indicator LED 3g can also be used.

By providing an LED (not shown) that blinks at the recognition timing at the time of power-on or reset, communication with the microcomputer gas meter 12 is performed at the recognition timing at the time of reset or power-on.
Is executed, and the connection state of the microcomputer gas meter 12 recognized based on the connection response result can be visually displayed using a simple display form using an LED (not shown).

Even if a connection change operation, an additional connection operation, a detachment operation, or the like of the microcomputer gas meter 12 occurs, the connection change operation or the addition of the microcomputer gas meter 12 is performed at the recognition timing at the time of reset or power-on. There is an effect that recognition can be performed accurately and quickly using a simple display form using an LED (not shown) that visually indicates the connection work or the removal work.

The controller 20 has storage means 270 for storing the connection status of the microcomputer gas meter 12. In the present embodiment, R
It is desirable to use AM231b.

By providing such a storage means 270, the connection status of the microcomputer gas meter 12 recognized at the recognition timing at the time of reset or power-on is stored.
70, the connection status data held in the storage unit 270 can be used as long as no connection change work, additional connection work, or removal work of the microcomputer gas meter 12 occurs. This eliminates the need for communication with the microcomputer gas meter 12, thereby improving the throughput of the controller 20.

Next, a meter reading processing function executed by the CPU 231 according to a predetermined program will be described.

The meter reading processing function performed by the CPU 231 according to a predetermined program includes a gas meter reading function, a gas remaining amount management function, a gas cutoff logic function, a gas leak sensor monitoring function, a battery voltage detection function, a clock and calendar function, and a setting. There are functions, test functions, and transmission control functions.

Hereinafter, the outline of each function constituting the meter reading processing function will be described.

First, the gas metering function will be described.

The meter reading communication section 237 has a meter reading communication section 237 for transmitting the first drive signal 32a to the microcomputer gas meter 12 via the interface 30 in response to the transmission request command signal 20a.

By providing such an interface 30, the first drive signal 32a transmitted to the microcomputer gas meter 12 via the meter reading communication section 237 in order to request the electronic message information 12a is used as the discharge characteristic of the input capacitance C1. Thus, it is possible to avoid inputting to the microcomputer gas meter 12 with a dull waveform due to the influence of the above. As a result, when the first drive signal 32a is transmitted from the controller 20 to the microcomputer gas meter 12,
Accurate timing information using the first drive signal 32a can be transmitted to the input stage of the microcomputer gas meter 12, and the microcomputer gas meter 12 sends the electronic message information 12a to the automatic notification device 10 in a state of being accurately synchronized with the first drive signal 32a. This has the effect of enabling communication with the controller 20. The microcomputer gas meter 12 receives the message information 12a and stores it in the RAM 231b.

The above-mentioned message information 12a is automatically notified to the information center 1. There are two ways to report.

One is a regular notification which has been conventionally performed. The message information 12 is periodically sent to the information center 1 at a date (report period) and time (report time) set in the initial setting.
Send a.

The other one is that the latest message information 12a is sent to the information center 1 at the determined reporting time determined on the set date determined every month.
Is transmitted.

Next, the gas remaining amount management function will be described.

The electronic message information 12a transmitted from the microcomputer gas meter 12 is received. Based on the message information 12a,
When the remaining amount of LP gas reaches two remaining amount warning values set by the initial setting, the information center 1 is notified. LP
The remaining amount of gas is reset to the set cylinder capacity set by the initial setting when the cylinder replacement switch 3f is turned on or when the remaining amount becomes zero.

When the above-mentioned cylinder exchange switch 3f is turned on, a cylinder exchange notification is made to the information center 1, and at the same time, a confirmation LED 3g (built-in in the switch 3f) is turned on.

Next, the gas cutoff logic function will be described.

Message information 1 from microcomputer gas meter 12
The gas consumption is monitored by 2a, and the calculation is performed every unit time to judge whether the flow rate is abnormal. When it is determined that there is an abnormality, a shutoff signal is output to the shutoff valve in the microcomputer gas meter 12 via the controller 3e, and the information center 1 is notified of the same.

In order to judge the above-mentioned abnormality, the maximum total flow rate is set by the initial setting, and when the gas flows exceeding the set maximum total flow rate, the gas plug is erroneously opened or the rubber tube is disconnected. Judge. The above-described abnormality is determined when five consecutive pulses occur at intervals shorter than the pulse interval calculated from the maximum total flow rate set in the electronic message information 12a from the microcomputer gas meter 12. Also, when the maximum flow rate is exceeded, a gas shutoff signal is output to the shutoff valve via the controller 3e, and the information center 1 is notified of the signal.

Next, the gas leak sensor monitoring function will be described.

A voltage signal (0 to 6 to 12 [V]) generated by the gas leak sensor 3c is monitored. Gas leak sensor 3
45 when the input from c exceeds 9 ± 0.5 [V]
Check for seconds, and if it becomes less than 9 ± 0.5 [V] before 45 seconds elapse, return to the state of monitoring the input from the sensor again. If the state of 9 ± 0.5 [V] or more continues for 45 seconds or more, it is determined that there is a gas leak, and a gas shutoff signal is output via the controller 3e to notify the information center 1 of the gas leak.

When the input voltage becomes less than 2 ± 0.5 [V], the check is performed for 10 seconds. When the state of less than 2 ± 0.5 [V] continues for more than 10 seconds, the gas leak sensor 3c becomes inoperable. (Disconnection, disconnection of outlet, etc.) and inform the information center 1 of the abnormality of the gas leak sensor 3c. However, when the power failure detection signal is input from the controller 3e, the abnormality notification about the gas leak sensor 3c is not performed.

Next, the battery voltage detecting function will be described.

When the battery detection circuit 238 detects that the voltage of the built-in lithium battery 239 has dropped,
The information center 1 is notified of the battery voltage drop. This notification is made at a voltage of about one month before inoperability.

Next, the clock and calendar functions will be described.

A clock is used for the transmission time of the above-mentioned periodic report, and a clock and a calendar are used for the transmission time and the transmission date of the above-mentioned automatic meter reading report. Leap year correction is performed automatically.

The time data consists of hours and minutes (24 hours).
Date data consists of year, month and day. The time data and the date data are set by the initial setting, and thereafter are set and corrected for each notification.

Next, the setting function will be described.

The necessary message information 12a is set to R
It is set in a predetermined area in AM 231b. Message information 1
2a can be sequentially updated by the message information 12a transmitted from the information center 1 at the time of notification. The following are mainly set as the message information 12a.

[0172] 1. 1. User ID (user code number) 2. Report destination telephone number (maximum 11 digits) 3. Dial system (dial pulse / push button) 4. Report time (Regular report and automatic meter reading report time: hour and minute) 5. Reporting cycle (periodical reporting cycle: day [00-99]) 6. Report date (automatic meter reading report date: day [00-28]) 7. Gas meter reading (telegram information 12a, meter reading 6 digits) 8. Maximum total flow rate (3 digits [pulse / hour]) 9. Set cylinder capacity (Set cylinder capacity 6 digits [number of pulses]) 10. Warning remaining point 1 (first warning point [number of pulses]) 12. Warning remaining point 2 (second warning point [number of pulses]) 12. Warning remaining point 3 (third warning point [number of pulses]) 13. Current time (current time: hour and minute) 14. Current date (current date: Christian year) Extension number (1 digit (0 to 9) is used (however, a space code is added when an outside line is connected)) When the report cycle is set to 00, the periodic report function is not performed. When 00 is set as the report date, the automatic meter reading report does not operate.

Next, the test function will be described.

A function test can be performed with the information center 1 via the telephone line 4. Automatic reporting device 10
When an abnormal signal is input when is turned on, the line test information is transmitted to the information center 1. Except for the line test information, the current status is transmitted.

Next, the transmission control function will be described.

When transmitting information to the information center 1, it is checked whether the subscriber's telephone 3b is in use or an incoming call is in progress, and the system waits until the telephone line 4 becomes empty.

If the telephone line 4 is empty, automatic dialing is performed in accordance with a preset destination telephone number.

When the information center 1 is busy, erroneously connected, or there is no response from the information center 1, or when the transmission is not completed normally, the telephone line 4 is temporarily released, and
Redial after 0 seconds. For example, if the information cannot be transmitted by dialing three times in total, redialing is performed, for example, after five minutes. If the information cannot be transmitted even with three dials at regular time intervals in the redialing, the dialing is performed again, for example, five minutes later.

As described above, according to the present embodiment, the communication state with the microcomputer gas meter 12 is actually executed, and the connection state of the microcomputer gas meter 12 can be recognized based on the connection response result without human intervention. There is an effect that a more rapid and accurate meter reading process can be executed as compared with the related art.

Also, the meter connection switch can be omitted, and the initial setting of the ON / OFF state of the meter connection switch can be omitted. An erroneously recognized switch setting can be avoided, and even if the microcomputer gas meter 12 is not connected, a connection state and an erroneously recognized switch setting by an installer can be avoided, thereby improving the reliability.

Further, since the connection state of the microcomputer gas meter 12 can be quickly and accurately recognized without human intervention based on the result of the electronic communication with the microcomputer gas meter 12, the meter connection switch can be eliminated from the automatic notification device 10. As a result, there is an effect that the work load of the above-mentioned initial setting from the installer of the automatic notification device 10 can be reduced.

Further, based on the result of the electronic communication with the microcomputer gas meter 12, the connection state of the microcomputer gas meter 12 can be recognized without manual operation, and the meter reading process can be executed more quickly and accurately than in the past. Even when a connection change operation, an additional connection operation, a removal operation, or the like of the gas meter 12 occurs, the microcomputer gas meter 1
There is an effect that it is possible to accurately and quickly recognize the connection change work, the additional connection work, the detachment work, and the like, using remote communication based on control from the information center 1.

Further, based on the result of the electronic communication with the microcomputer gas meter 12, the connection state of the microcomputer gas meter 12 can be recognized without manual operation, and the meter reading process can be executed more quickly and accurately than in the past. Since there is no need to reset the ON / OFF state of the meter connection switch in response to a connection change operation, an additional connection operation, or a removal operation of the gas meter 12, an artificial erroneous setting of the meter connection switch is newly performed when resetting. This has the effect of avoiding the occurrence and improving the reliability.

Further, the meter connection switch can be omitted from the automatic notification device 10, and as a result, there is an effect that the cost of the device can be reduced and the size of the device can be reduced.

Next, an embodiment of a connection state recognition method used in the automatic notification device 10 will be described.

This connection state recognition method uses a connection state for recognizing the connection state of the microcomputer gas meter 12 for collecting the message information 12a concerning the LP gas use state via the telephone line 4 using a remote communication operation. The connection state recognition processing step includes a recognition processing step.
At a predetermined recognition timing (specifically, at the time of reset or power-on) before performing communication with the microcomputer 2, using communication to recognize the connection state with the microcomputer gas meter 12 that generated the communication request; The microcomputer gas meter 1 in a connected state with the microcomputer gas meter 12 whose connection response has been confirmed.
2 for collecting the electronic message information 12a for the microcomputer gas meter 12 whose connection state has been recognized.

Next, the operation of the interface 30 provided in the meter reading meter communication section 237 in the controller 20 will be described.

[0188] Figure 5 is a timing chart for explaining the operation of the interface 30 provided on the needle meter communication unit 237 in the controller 20 of FIG. 4, FIG. 5 (a), the input to the connection point A Transmission request command signal 2
Ri wave Katachidea of 0a, FIG. 5 (b), photo coupler PC
FIG. 5C shows the ON / OFF state of the transistor TR1, and FIG. 5D shows the ON / OFF state of the transistor TR2.
(E) shows the first drive signal 32 output from the terminal TC4.
FIG. 5A is a waveform of a composite wave of the second drive signal 34a and FIG.
FIG. 5F shows the waveform of the second drive signal 34a input to the base of the transistor TR2 via the connection point b.
(G) is a waveform of the timing signal 32b output from the transistor TR1.

[0189] As shown in FIG.
0 inputs the transmission request command signal 20a via the connection point A.

As shown in FIG. 5B, the photodiode in the photocoupler PC receives the transmission request command signal 20a.
Is activated in response to the LOW state of the photo transistor, thereby activating the phototransistor.

As shown in FIG. 5B, the phototransistor is activated in response to the activation of the photodiode to promote the activation of the first transistor TR1.

When activated, the first transistor TR1 generates the first drive signal 32a in the Hi state as shown in FIG. 5C. When inactivated, the first drive signal 32a in a low state as shown in FIG. 5C is generated.

That is, as shown in FIGS. 5A and 5E,
The Low state of the first drive signal 32a is generated according to the Hi state of the transmission request command signal 20a, and the transmission request command signal 2a
The Hi state of the first drive signal 32a is generated according to the Low state of 0a, and is output to the terminal TC4.

A timing signal 32b as shown in FIG. 5G is generated at the connection point a in accordance with the active state / inactive state of the phototransistor. That is, a low-level timing signal 32b is generated according to the active state of the phototransistor, and a high-level timing signal 32b is generated according to the inactive state of the phototransistor.

The differentiating circuit 342 generates the timing signal 32b
The second drive signal 34a (FIG. 5)
(F) is output to the base of the transistor TR2 via the connection point b.

The second transistor TR2 is activated for a discharge time T (see FIG. 5D) in accordance with the Hi state of the second drive signal 34a, and discharges the charge stored in the capacitor C1 to the ground point as a current I. .

[0197]

According to the present onset light according to the present invention, an effect that it becomes possible to avoid that the transmit signal under the influence of the discharge characteristics of the input capacitance dulled waveform will be input to the device. As a result, there is an effect that accurate timing information using the transmission signal can be transmitted to the input stage to the device.

[0198] an effect that it becomes possible to avoid that the result is input to the device the waveform transmission signal under the influence of the discharge characteristics dull the input capacitance. As a result, when the transmission signal is transmitted to the device, there is an effect that accurate timing information using the transmission signal can be transmitted to the input stage to the device.

[0199] transmission signal transmitted to the meter reading means to request test needle information, said at affected blunt waveform of the discharge characteristics of the input capacitance so can be avoided that is input to the meter reading unit It works. As a result, when a transmission signal is transmitted to the meter reading means, accurate timing information using the transmission signal can be transmitted to the input stage to the meter reading means, and the meter reading information can be accurately synchronized with the transmission signal. Can be communicated to the automatic notification device.

[0200] avoid transmission signal transmitted via the communication line to the meter reading means to request test needle information, will be input to the meter reading means dull under the influence of the discharge characteristics of the input capacitance waveform It has the effect of being able to do so. As a result, when the transmission signal is transmitted to the meter reading means,
Accurate timing information using the transmission signal can be transmitted to the input stage to the meter reading means, so that the meter reading means can communicate the meter reading information to the automatic reporting device in a state of being accurately synchronized with the transmission signal.

[0202] the transmission signal transmitted via the needle meter communication unit to meter reading means to request test needle information, will be input to the meter reading means dull under the influence of the discharge characteristics of the input capacitance waveform Is achieved. As a result, when the transmission signal is transmitted from the controller to the meter reading means, accurate timing information using the transmission signal can be transmitted to the meter reading means to the input stage, and the meter reading means is accurately synchronized with the transmission signal. There is an effect that the meter reading information can be communicated to the controller of the automatic notification device.

[0203] test first driving signal needles information through the needle meter communication unit to meter reading means to request being transmitted is inputted to the meter reading unit in affected blunt waveform of the discharge characteristics of the input capacitance There is an effect that it is possible to avoid the situation. As a result, when the first drive signal is transmitted from the controller to the meter reading means, accurate timing information using the first drive signal can be transmitted to the meter reading means to the input stage,
The meter reading means has an effect that the meter reading information can be communicated to the controller of the automatic notification device in a state in which the meter reading means is accurately synchronized with the first drive signal.

By providing the first driving means and the second driving means 34 having such functions, there is an effect that it is not necessary to add a photocoupler.
As a result, it is possible to realize an interface having a simple configuration that does not require a new terminal for driving the photocoupler and an automatic notification device using the interface.

Further, since it is not necessary to add the photocoupler, there is an effect that an interface having a simple configuration capable of reducing the influence on the device cost and an automatic notification device using the interface can be realized. Play.

For the same purpose, no new terminal is required.
This has the effect of eliminating the need to change the number of terminals in an existing terminal plate or connector or to add a new terminal plate or connector. As a result, there is an effect that an interface having a simple configuration that can reduce the influence on the device cost and an automatic notification device using the interface can be realized.

[0206]

By generating a timing signal using the first driving means, the influence of the discharge characteristics of the input capacity upon transmission to the meter reading means via the meter reading communication section in order to request the meter reading information. It is possible to prevent an input to the meter reading means with a dull waveform received at an accurate timing. As a result, when the first drive signal is transmitted from the controller to the meter reading means, accurate timing information using the first drive signal can be transmitted to the input means to the meter reading means, and the meter reading means can accurately communicate with the first drive signal. The meter reading information can be communicated to the controller of the automatic reporting device in a synchronized state.

[0208] Depending on the setting accurately the discharge time using the discharge charging time setting circuit, when sent over the needle meter communication unit to meter reading means to request meter reading information, the input capacitance accumulated charge Can be sufficiently discharged based on the discharge time, and input to the meter reading means with a dull waveform affected by the discharge characteristics of the input capacitance can be avoided with accurate timing and with good reproducibility. This has the effect. As a result, when the first drive signal is transmitted from the controller to the meter reading means, accurate timing information using the first drive signal can be transmitted to the input means to the meter reading means, and the meter reading means can accurately communicate with the first drive signal. The meter reading information can be communicated to the controller of the automatic reporting device in a synchronized state.

By providing the discharge time setting circuit having such a configuration, there is an effect that it is not necessary to add a photocoupler. As a result, it is possible to realize an interface having a simple configuration that does not require a new terminal for driving the photocoupler and an automatic notification device using the interface.

[0210] In addition, since it is not necessary to increase the number of photocouplers, it is possible to realize an interface having a simple configuration capable of reducing the influence on the apparatus cost and an automatic notification apparatus using the interface. Play.

With the same principle, no new terminal is required.
This has the effect of eliminating the need to change the number of terminals in an existing terminal plate or connector or to add a new terminal plate or connector. As a result, there is an effect that an interface having a simple configuration that can reduce the influence on the device cost and an automatic notification device using the interface can be realized.

[0212] Depending to accurately set the discharge time by using the finely divided circuit, when sent over the needle meter communication unit to meter reading means to request meter reading information, differentiating the accumulated charge of the input capacitance It is possible to discharge sufficiently based on the second drive signal generated by the circuit, and to input to the meter reading means with a dull waveform under the influence of the discharge characteristics of the input capacitance at accurate timing and with good reproducibility. This has the effect that it can be avoided. As a result, when the first drive signal is transmitted from the controller to the meter reading means, accurate timing information using the first drive signal can be transmitted to the input means to the meter reading means, and the meter reading means can accurately communicate with the first drive signal. The meter reading information can be communicated to the controller of the automatic reporting device in a synchronized state.

Further, by providing the differentiating circuit having such a configuration, there is an effect that it is not necessary to add a photocoupler. As a result, it is possible to realize an interface having a simple configuration that does not require a new terminal for driving the photocoupler and an automatic notification device using the interface.

[0214] In addition, since it is not necessary to increase the number of photocouplers, it is possible to realize an interface having a simple configuration capable of reducing the influence on the apparatus cost and an automatic notification apparatus using the interface. Play.

In the same manner, no new terminal is required.
This has the effect of eliminating the need to change the number of terminals in an existing terminal plate or connector or to add a new terminal plate or connector. As a result, there is an effect that an interface having a simple configuration that can reduce the influence on the device cost and an automatic notification device using the interface can be realized.

[0216] Depending on the immobilizing input capacitance with condensers, an effect that it becomes able improve the stability and reproducibility of the removal characteristics of the noise.

As a result, it is possible to accurately set the discharge time, the timing signal, and the second drive signal, and it is possible to sufficiently discharge the stored charge of the input capacitor with good reproducibility.

[Brief description of the drawings]

FIG. 1 is a circuit diagram for explaining a basic configuration of an interface according to the present invention.

FIG. 2 is a functional block diagram showing an LP gas home security system to which the automatic notification device according to the present invention is applied.

FIG. 3 is a functional block diagram for explaining a basic configuration of an automatic notification device provided in the LP gas home security system of FIG. 2;

FIG. 4 is a circuit diagram illustrating a basic configuration of a controller provided in the automatic notification device of FIG. 3;

5 is a timing chart for explaining the operation of an interface provided in a meter reading communication section in the controller shown in FIG. 4; FIG. 5A is a transmission request command signal input to a connection point A; FIG. 5B shows the ON / OFF state of the photocoupler PC, and FIG.
FIG. 5C shows the ON / OFF state of the transistor TR1, and FIG. 5D shows the ON / OFF state of the transistor TR2.
FIG. 5E shows a waveform of a composite wave of the first drive signal and the second drive signal output from the terminal TC4,
FIG. 5F shows the waveform of the second drive signal input to the base of the transistor TR2 via the connection point b.
(G) is a waveform of the timing signal output from the transistor TR1.

FIG. 6 is a circuit diagram for explaining an interface provided in a meter reading meter communication unit in a conventional automatic notification device.

[7] A timing chart for explaining the operation of the interface of FIG. 6, FIG. 7 (a), node A
Wave Katachidea transmission request signal input to Ri, and FIG. 7 (b)
7 shows the ON / OFF state of the first photocoupler PC1, and FIG. 7C shows the waveform of the drive signal output from the terminal DT.

8 is a circuit diagram for explaining a conventional interface for improving responsiveness of a meter reading meter communication unit in the automatic notification device of FIG.

[9] A timing chart for explaining the operation of the interface of FIG. 8, FIG. 9 (a), node A
Wave Katachidea transmission request signal inputted to Ri, and FIG. 9 (b)
9 shows the waveform of the drive signal input to the connection point b.
(C) is, at the ON / OFF state of the photo coupler PC1
Oh it is, Fig. 9 (d) is, ON / O of the photo coupler PC2
FIG. 9E shows the waveform of the transmission request signal output from the terminal DT in the FF state.

[Description of Signs] 1 Information center 4 Communication line 10 Automatic reporting device 12 Meter reading means (microcomputer gas meter) 12a Electronic message information 12a_1 Meter reading information 20 Controller 20a Transmission request command signal 237 Meter reading meter communication section 30 Interface 32 First driving means 32a First Drive signal (transmission signal) 32b Timing signal 34 Second drive means 34a Second drive signal 342 Discharge time setting circuit (differential circuit) C1 Input capacitance C2 Capacitor T Discharge time TR1 First transistor TR2 Second transistor PC Photocoupler

Continuation of the front page (56) References JP-A-8-162919 (JP, A) JP-A-7-162279 (JP, A) JP-A-3-62612 (JP, A) JP-A-54-52448 (JP) , A) (58) Field surveyed (Int. Cl. ⁷ , DB name) G08C 15/00

Claims (1)

(57) [Claims] (1) The usage status of gas, water, electricity, etc.
Automatic reporting device having meter reading means for collecting meter reading information
A transmission request command signal to control the collection of meter reading information
Provided in the meter reading communication section of the controller,
A transmission signal is input to the meter reading means in response to the transmission request command signal.
The noise transmitted to the power stage and superimposed on the transmission signal
Noise at the input stage to remove noise from the transmitted signal.
Accumulated in the capacitors that make up the time constant circuit
Execute control to discharge electric charge at a predetermined timing.
The interface comprises a photodiode and a phototransistor.
Photocap which is turned ON / OFF by transmission request command signal
And the collector of the phototransistor of the photocoupler.
Is connected to the base, and O
A first transistor to be in an N state;
The first transformer that is turned on while the transistor is on
A first drive signal which is the transmission signal is generated by a resistor.
And the phototransistor is turned from ON to OFF.
The first transaction which continues to be turned on at the
Discharge timing of the accumulated charge is controlled by a resistor.
Driving means for generating a timing signal for discharging the accumulated electric charge in synchronization with the timing signal.
To perform the prompting control and to control the time
Second driving means for generating a second driving signal, wherein the second driving means comprises a capacitor connected in series and
Having a resistance, differentiating the timing signal,
2 Discharge time setting times consisting of a differentiation circuit that generates a drive signal
Path and an input of the meter reading means connected in parallel with the meter reading means.
Activated by the second drive signal and
A second transistor for controlling the discharge of the stored charge.
An automatic notification device .