JP3109343B2 - Cascade connection slave station device, data transmission method to cascade connection slave station device, and address recognition method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of counting gas, counted by each slave station device cascaded to one communication line from a station.
The present invention relates to a cascade connection slave station device, a data transmission method to the cascade connection slave station device, and an address recognition method of a count value transmission system for automatically transmitting a count value of a usage amount of electricity or the like to a center.

[0002] The usage of gas, electricity, etc. in each home is integrated by a meter, and the slave station device in each home automatically transmits the integrated data to the center via a communication line when the meter reading date is reached. In the count value transmission system, in the case of an apartment or an apartment complex, since the homes are dense and the time to use the communication line is short, to reduce the number of communication lines to use, the slave stations of each household The apparatus is connected in tandem to one communication line from the station, and the integrated data is automatically transmitted to the center via the communication line on the meter reading date.

[0003] However, changes in the meter reading date, center telephone number, communication format, etc., stored in the control unit of each slave station device.
If necessary , change the content stored in the control unit of each slave station from the center to reduce the trouble of changing.
It can be, also, to access the slave station apparatus from center
Address to identify each slave station device
When (1,... N) is detected by the number of pulses,
Even if the number of pulses fluctuates back and forth due to
It is desired that the dress can be detected.

[0004]

2. Description of the Related Art FIG. 8 is a block diagram of a conventional count value transmission system, and FIG. 9 is a sequence diagram of gas meter data transmission in the case of FIG.

FIG. 8 is a block diagram in the case of a count value transmission system for transmitting gas meter reading data. In a station 101, slave stations 11 to 1N are cascaded via a center 100 and one communication line 102. It is connected to the.

Gas meters 21 to 2N are connected to the slave station devices 11 to 1N, respectively, so that meter reading data is input to a meter communication unit 9.
Switch 6 is connected to the downstream slave station device side.

The control unit 14 of each of the slave station devices 11 to 1N stores a meter reading date, a telephone number of a center, a communication communication format, and the like. As shown in (1), the switch 6 is switched to the own device side, a dial signal of the telephone number of the center is sent to the station 101, the center 100 is called, and when there is a line connection response, the gas meter 21 read into the meter communication unit 9 is read. The data is transmitted in the stored communication format using the data transmission unit 13, the switch 6, the communication line 102, and the station 10.
1 to the center 100.

However, a setting value stored in the control unit 14, meter reading day, center telephone number, if the need to change, such as communication format occurs, human slave station apparatuses
Bring the setting device 16 to the installation location of the
And the changed data is sent from the setter 16 to the controller 14 via the setter communication unit 15 and changed.
Was .

In the event of a gas leak or fire,
I had to go to the main tap.

[0010]

Therefore, the conventional method for changing the set value has a problem that it takes time, and in the case of a fire at home, the gas is not supplied to the gas meter or the slave station. There is a problem that cannot be stopped
Was .

The present invention is any change of the set value stored in the control unit of the slave station devices, cascaded slave stations and gas when the fire, the supply stop of the electric or the like can from center It is an object of the present invention to provide a method of transmitting data to a cascade-connected slave station device and an address recognition method capable of widening an allowable range of the number of detected pulses when the slave station device detects an address by the number of pulses.

[0012]

Means for Solving the Problems] was to solve the above problems
According to a first aspect of the present invention, one communication line from a station is connected in tandem.
The first, second,... Nth slave station devices (1, 2,.
N) has a switch for switching the communication line on its own device side or on the downstream device side, and each of the slave station devices stores at least the count value transmission time and the telephone number of the center. And a control unit for controlling each unit. When the count value transmission time stored under the control of the control unit is reached, the switch is switched to the own device side, and the communication line and the station are switched. Connect to center via
In the count value transmission system for transmitting the meter count value to the center , each of the slave station devices (1, 2,... N) includes a call signal detection unit for notifying the control unit when a call signal from the station is detected. When provided a device communication unit which communicates with the connected by the signal line slave station apparatuses, call in the call out signal detector
In the slave station device that has detected the signal, the calling signal from the center is
After being detected by the call signal detection unit,
Signal of the desired slave station device via the inter-device communication unit.
A means for informing the inter-device communication unit of an incoming call;
In the device, the switch is set to its own device side under the control of the control unit.
Switching means and data from the center
Means for updating the storage content of the control unit received via
It has.

According to a second aspect of the present invention, when the center transmits data to a desired slave station device, the center transmits the data to the desired slave station device via the station.
The slave station device is called, and the slave station device and the communication line are connected.
The device ID for identifying the slave station to which you want to send data.
The dress is transmitted to the slave station device and identified from the desired slave station device.
When the signal reception response signal is received, the data is transmitted to the desired slave station device.
Data to be sent.

A third aspect of the present invention provides a method for transmitting signals to N slave stations having addresses 1, 2,... N respectively connected in cascade to one signal line. Device address N × n + L (where n = 2 ^m , L <2 ^m , and L is
The allowable number of noise pulses when recognizing the device address, m is
It is a positive integer. ) The number of pulses is sent, and each slave station device divides the number of received pulses by n, and recognizes the address of its own device by the divided integer value.

[0015]

According to the present invention, in a count value transmission system in which slave stations 1, 2, ... N are cascade-connected to one communication line from the station, each slave station 1, 2,. 2, ...
The data is transmitted to N desired slave stations, and the desired slave station that has received the data is input to the control unit via a switch and data transmission / reception .

When a signal is sent to N slave stations whose addresses are 1, 2,... N respectively connected in cascade to one signal line, the address N of the slave station apparatus is transmitted from the transmitting side apparatus. × n +
L (where n = 2 ^m , L <2 ^m , and L is
Number of noise pulses when recognizing the noise, m is a positive integer
is there. ) Sends a number of pulses, the number of received pulses divided by n in該各Ko station apparatus, it is an address of its own apparatus is recognized by an integer value obtained by dividing.

[0017]

FIG. 1 is a block diagram of a count value transmission system according to an embodiment of the present invention, FIG. 2 is a sequence diagram in the case of changing a set value in FIG. 1, and FIG. 3 is a count value of another embodiment of the present invention. FIG. 4 is a block diagram of a count value transmitting system according to another embodiment of the present invention, FIG. 5 is a block diagram of an example of a pulse transmitting section and a pulse number detecting section, and FIG.
FIG. 7 is a time chart of the pulse sending unit and the pulse number detecting unit in the case where the above is set, and FIG. 7 is a diagram showing the pulse number of the pulse sending unit of one example and the pulse recognition range of the pulse number detecting unit.

FIG. 1 is different from the conventional example of FIG. 8 in that the data transmission unit 13 of the slave station device is a data transmission / reception unit 7, an inter-device communication unit 10 is provided, and the slave station device 1 is a master device. , The slave stations 2 to N as slaves, and the master 1
Is provided with a call signal detecting unit 5. On the meter reading date, sending the data read by the gas meters 21 to 2N to the center 100 is the same as the conventional example of FIG. A description will now be given of the transmission of data from the center 100 to the slave station device with reference to FIG.

When data is sent from the center 100 to the slave device 2, for example, as shown in FIG.
A dial signal of the slave station device is sent to the station 101 and the station 10
When 1 sends a call signal to the slave station device, the call signal detection unit 5 of the master device 1 detects this, switches the switch 6 to its own device side via the control unit 8, and performs line acquisition.

When the station 101 recognizes that the master device 1 has captured the line, it sends a line connection signal to the center 100. Then, the center 100 sends an identification signal of the slave device 2. This identification signal is sent to the control unit 8 via the switch 6 and the data transmission / reception unit 7 of the master device 1.

The control unit 8 recognizes that the slave device 2 is being called based on the identification signal, and transmits a line switching instruction to the slave device 2 via the inter-device communication unit 10. T1 time required to output a response signal for receiving the switching identification signal to the own device side, for example, 2
After a second, the switch 6 is switched to the downstream device side.

Then, the inter-device communication unit 10 of the slave device 2
Detects this signal, switches the switch 6 to its own device side via the control unit 8, and the control unit 8 sends the data transmission / reception unit 7,
The response signal for receiving the identification signal is sent to the center 1 via the switch 6.
Send to 00.

The center 100 receives the data and sends desired data, for example, data on a meter reading date change, or data on stopping gas supply to the home in case of fire. This data is sent to the control unit 8 via the switch 6 and the data transmission / reception unit 7 of the slave device 2.
In the case of changing the meter reading date stored in the storage unit, or in the case of data of gas supply stoppage to the home, the data is sent to the gas meter 22 via the meter communication unit 9 to stop the gas supply to the home.

In the case of FIG. 3, the call signal detecting section 5 is provided in each of the slave stations 1 ', 2', N ', and when a call signal of the slave station is sent from the station 101, the last communication with the previous center is made. When the calling signal detecting unit 5 of the slave station device, for example, 2 ′ detects this, the same operation as the master device in the case of FIG. 1 is performed, and when the identification signal of the slave station device 1 ′ is transmitted from the center 100, for example. The control unit 8 of the slave station device 2 ′ sends a line switching signal from the inter-device communication unit 10 to the inter-device communication unit 10 of the slave station device 1 ′, and switches the switch 6 to its own device. The station device 1 ′ becomes the master device, and switches the data sent from the center 100 to the switch 6 and the data transmitting / receiving unit 7.
For example, in the case of the meter reading date change data, the meter reading date stored in the control unit 8 is changed, and in the case of the gas supply stop data to the home, the meter communication unit 9 is input. To the gas meter 22 to stop the gas supply to the home.

FIG. 4 shows a configuration in which the inter-device communication unit 10 of the master device 1 in FIG. 1 is a pulse transmission unit 11 and the inter-device communication unit 10 of the slave devices 2 to N is a pulse number detection unit 12. FIG. 5 shows a block diagram of the unit 11 and a block diagram of the pulse number detecting unit 12, and FIG. 6 shows a time chart of the pulse transmitting unit and the pulse number detecting unit when the number of pulses is set to 5.

For example, from the master device 1 to the slave device 2
Assuming that the pulse number 5 is transmitted when communication is performed, the pulse number detection unit 12 of the slave device 2 detects this from the pulse transmission unit 11 when the data of the pulse number 5 is transmitted. Similarly, it switches the switch 6 to its own device side via the control unit 8 and sends out a response signal for receiving the identification signal.

Next, the pulse transmitting section will be described with reference to FIGS. 5 (A) and 6 (A). When the setting data of the pulse number 5 is input from the control unit 8, it is written into the register unit 30 by the write pulse shown in FIG. 6A, and the setting value of 5 is changed to the coincidence detection unit as shown in A of FIG. Send to 31.

On the other hand, in the counter section 32, D in FIG.
The clock shown in FIG. 6 is counted, and the count value is shown in FIG.
6B, a pulse output is output to the coincidence detection unit 31 as a pulse output, and a pulse indicated by the pulse output Q1 in FIG. 6A is output from the output Q1 of the counter unit 32 as a pulse output.

In the coincidence detecting section 31, the counter section 32 shown in FIG.
FIG. 6 shows that when the output indicated by B in FIG.
(A) As shown in C of FIG.
In step 3, the count operation of the feed count unit 32 is stopped.

Next, the pulse number detecting section will be described with reference to FIGS. 5B and 6B. The pulse output from the pulse transmitting unit shown in the pulse input of FIG.
When the counter unit 35 counts 5 as indicated by I in FIG. 6B, the counter unit 35 outputs the least significant three bits of the count value and inputs it to the coincidence detection unit 36.

On the other hand, a set value of 1 is written in the register section 34, and one level indicated by H in FIG. 6B is output and input to the coincidence detecting section 36.
5 is compared with the count value of the least significant 3 bits or more indicated by I in FIG. 6B. When the count value of the least significant 3 bits or more reaches the count value of the set value 1, the value of J in FIG. As shown, the H level is output and stored in the storage unit 37.

On the other hand, the pulse input is detected by the pulse number detecting section 38, and when the pulse input is lost, the timer 39 is notified. After a lapse of a specified time T3, for example, about 3 seconds, the timer 39 outputs a line from the master device. It recognizes that the output of the switching instruction pulse has been completed, outputs a pulse indicated by K in FIG. 6B, and changes the H level stored in the storage unit 37 to the level shown in FIG.
As shown in the line switching request of FIG.
To switch the switch 6 to the own device side.

Thereafter, when a clear signal shown in FIG. 6B is input to the counter section 35, the counter section 35 is cleared and the number of input pulses can be detected. The number of pulses for discriminating the slave devices 2 to N from the pulse detection unit 11 to the slave devices 2 to N is represented by the address N × n + L (where n = 2 ^m , L <2) of the slave device.
^m , and L is the noise pattern when recognizing the own device address.
The allowable number of looses, m, is a positive integer. ), Eg, FIG.
[N × 4 + 1] as shown in FIG.
In the case of .about.N, if the input pulse number is divided by 4 and the own station is recognized by an integer value divided by 4, the pulse number recognition range of the pulse number detection unit 12 is as shown in FIG. ,
Since an allowable range of -1 to +2 is given, malfunction due to external noise or the like can be prevented. The number of output pulses
= N × n + L, and n = 2 raised to a power
Calculate the number of pulses to determine the device address
This is because the circuit was downsized.

[0034]

As described above in detail, according to the present invention, in a count value transmission system in which slave stations 1, 2, and N are cascaded to one communication line 102 from a station 101, a center transmission system is provided. 100, data can be transmitted to desired slave stations of each of the slave stations 1, 2, and N, change of set values stored in the control unit, and stoppage of supply of gas, electricity, and the like in case of fire. Has an effect that can be made possible from the center. Further, in the address recognition method of the present invention, when the slave station detects the number of pulses and detects the address of the own station, there is an effect that the allowable range of the number of pulses for detecting the address is widened.

[Brief description of the drawings]

FIG. 1 is a block diagram of a count value transmission system according to an embodiment of the present invention;

FIG. 2 is a sequence diagram in the case of changing a set value in FIG. 1,

FIG. 3 is a block diagram of a count value transmission system according to another embodiment of the present invention;

FIG. 4 is a block diagram of a count transmission system according to another embodiment of the present invention;

FIG. 5 is a block diagram of an example of a pulse transmission unit and a pulse number detection unit;

FIG. 6 is a time chart of a pulse transmission unit and a pulse number detection unit when the number of pulses is set to 5;

FIG. 7 is a diagram showing an example of the number of pulses of a pulse transmission unit and a pulse recognition range of a pulse number detection unit;

FIG. 8 is a block diagram of a conventional count value transmission system,

FIG. 9 is a sequence diagram of gas meter data transmission in the case of FIG.

[Explanation of symbols]

 1 is a slave station device, a master device, 2, N is a slave station device, a slave device, 1 ', 2', N ', 11, 12 are slave station devices, 5 is a call signal detector, 6 is a switch, and 7 is a switch. 8, 14 are control units, 9 is a meter communication unit, 10 is an inter-device communication unit, 11 is a pulse transmission unit, 12 is a pulse number detection unit, 13 is a data transmission unit, 15 is a setting unit communication unit, 16 is a setting device, 21, 22, 2N are gas meters, 20, 24 are register units, 32, 35 are counter units, 31 and 36 are coincidence detection units, 33 is an AND circuit, 37 is a storage unit, and 38 is a pulse detection unit. 39, a timer unit, 100, a center, 101, a station, and 102, a communication line.

Continuation of the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H04M 11/00-11/10 H04Q 5/00-5/26 H04Q 9/00-9/16 H04L 11/00 320- 321

Claims (3)

(57) [Claims] 1. A cascade connection to one communication line from a station.
The first, second,... Nth slave station device (1, 2,.
N) has a switch for switching the communication line on its own device side or on the downstream device side, and each of the slave station devices stores at least the count value transmission time and the telephone number of the center. It has a control unit for controlling each unit , and when the count value transmission time stored under the control of the control unit is reached , switches the switch to its own device side and connects to the center via the communication line and the station.
In the count value transmission system for transmitting the meter count value to the center , each of the slave station devices (1, 2,... N) includes a call signal detection unit for notifying the control unit when a call signal from the station is detected. When,
A device communication unit which communicates with the connected by the signal line slave station apparatuses provided in the slave station apparatus has detected the call signal in the call out signal detector
Detects the calling signal from the center with the calling signal detecting unit
After receiving the identification signal of the desired slave station device,
To the inter-device communication unit of the desired slave station device via the
Means for controlling the control unit in a desired slave station device.
Means for switching the switch to its own device side,
And receives data from the
Means for updating the storage content of the slave station. 2. A cascade connection to one communication line from a station.
The first, second,... Nth slave station device (1, 2,.
N) has a switch for switching the communication line on its own device side or on the downstream device side, and each of the slave station devices stores at least the count value transmission time and the telephone number of the center. It has a control unit for controlling each unit, and when the count value transmission time stored under the control of the control unit is reached , switches the switch to its own device side and connects to the center via the communication line and the station.
In a count value transmission system that transmits a meter count value to a center, when the center transmits data to a desired slave station device,
Calling a slave station device from the center via the station;
If the device and communication line were connected, data was sent
The device address for identification of the slave station device is transmitted to the slave station device.
And receives an identification signal reception response signal from the desired slave station device.
And transmitting data to a desired slave station device . 3. An address cascade-connected to one signal line.
Signals to N slave units of 1, 2,... N
When sending, the address of the slave station device N × n
+ L (where n = 2 ^m , L <2 ^m , and L is
Number of noise pulses when recognizing noise, m is a positive integer
It is. ) Send a number of pulses and receive
The number of pulses divided by n is divided by n, and the integer
The feature is to recognize that it is a dress
Address recognition method.